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Kwong A, Au CH, Shin VY, Ho DN, Wong EYL, Ho CYS, Chung Y, Chan TL, Ma ESK. Rapid Breakpoint Mapping of a Novel Germline PALB2 Duplication by PCR-Free Long-Read Sequencing for Interpretation of Its Pathogenicity. JCO Precis Oncol 2022; 5:1044-1047. [PMID: 34994627 DOI: 10.1200/po.20.00454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- Ava Kwong
- Department of Surgery, The University of Hong Kong and The University of Hong Kong-Shenzhen Hospital, Hong Kong, China.,Department of Surgery and Cancer Genetics Centre, Hong Kong Sanatorium and Hospital, Hong Kong, China.,Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong Sanatorium and Hospital, Hong Kong, China
| | - Chun Hang Au
- Division of Molecular Pathology, Department of Pathology, Hong Kong Sanatorium and Hospital, Hong Kong, China
| | - Vivian Y Shin
- Department of Surgery, The University of Hong Kong and The University of Hong Kong-Shenzhen Hospital, Hong Kong, China
| | - Dona N Ho
- Division of Molecular Pathology, Department of Pathology, Hong Kong Sanatorium and Hospital, Hong Kong, China
| | - Elaine Y L Wong
- Division of Molecular Pathology, Department of Pathology, Hong Kong Sanatorium and Hospital, Hong Kong, China
| | - Cecilia Y S Ho
- Division of Molecular Pathology, Department of Pathology, Hong Kong Sanatorium and Hospital, Hong Kong, China
| | - Yvonne Chung
- Division of Molecular Pathology, Department of Pathology, Hong Kong Sanatorium and Hospital, Hong Kong, China
| | - Tsun Leung Chan
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong Sanatorium and Hospital, Hong Kong, China.,Division of Molecular Pathology, Department of Pathology, Hong Kong Sanatorium and Hospital, Hong Kong, China
| | - Edmond S K Ma
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong Sanatorium and Hospital, Hong Kong, China.,Division of Molecular Pathology, Department of Pathology, Hong Kong Sanatorium and Hospital, Hong Kong, China
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Cheuk IW, Chen J, Siu M, Ho JC, Lam SS, Shin VY, Kwong A. Resveratrol enhanced chemosensitivity by reversing macrophage polarization in breast cancer. Clin Transl Oncol 2021; 24:854-863. [PMID: 34859370 DOI: 10.1007/s12094-021-02731-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 11/01/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND Resveratrol, a naturally occurring polyphenolic compound, has been shown to inhibit cancer growth by targeting several cancer-related signalling pathways. In the tumor microenvironment (TME), tumor-associated macrophages (TAMs) are the most abundant leukocyte population that are associated with poor prognosis in over 80% of breast cancer cases. However, little is known about the effect of resveratrol in the TME. METHODS In this study, MDA-MB-231(MB231), cisplatin resistance MDA-MB-231 (cisR), and T47D were used to examine the antitumor effect of resveratrol. The effectiveness of resveratrol, together with cisplatin as breast cancer treatment was investigated in vivo. Gene expressions of M1 (iNOS and CXCL10) and M2 (ARG1, CD163 and MRC1) markers in differentiated macrophages derived from THP-1 cells were examined to investigate the effect of resveratrol on TAM polarization in breast cancer progression. RESULTS Our results demonstrated that resveratrol significantly reduced cell proliferation and enhanced chemosensitivity in breast cancer cells by inhibiting production of IL-6 and STAT3 activation. Treatment of resveratrol increased CXCL10 (M1 marker) expression. Further, resveratrol decreased IL-6 levels in LPS-treated differentiated macrophages. The use of resveratrol with cisplatin inhibited suppressed tumor growth when compared with cisplatin alone. CONCLUSION This study revealed that resveratrol inhibited breast cancer cell proliferation by promoting M1/M2 macrophage polarization ratio and suppressing IL-6/pSTAT3 pathway.
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Affiliation(s)
- I W Cheuk
- Department of Surgery, The University of Hong Kong and The University of Hong Kong-Shenzhen Hospital, Hong Kong SAR, China
| | - J Chen
- Department of Surgery, The University of Hong Kong and The University of Hong Kong-Shenzhen Hospital, Hong Kong SAR, China
| | - M Siu
- Department of Surgery, The University of Hong Kong and The University of Hong Kong-Shenzhen Hospital, Hong Kong SAR, China
| | - J C Ho
- Department of Surgery, The University of Hong Kong and The University of Hong Kong-Shenzhen Hospital, Hong Kong SAR, China
| | - S S Lam
- Department of Surgery, The University of Hong Kong and The University of Hong Kong-Shenzhen Hospital, Hong Kong SAR, China
| | - V Y Shin
- Department of Surgery, The University of Hong Kong and The University of Hong Kong-Shenzhen Hospital, Hong Kong SAR, China
| | - A Kwong
- Department of Surgery, The University of Hong Kong and The University of Hong Kong-Shenzhen Hospital, Hong Kong SAR, China.
- Department of Surgery, The Hong Kong Sanatorium and Hospital, Hong Kong SAR, China.
- The Hong Kong Hereditary Breast Cancer Family Registry, Room K1401, Queen Mary Hospital, Pokfulam Road, Hong Kong SAR, China.
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Kwong A, Shin VY, Ho CYS, Khalid A, Au CH, Chan KKL, Ngan HYS, Chan TL, Ma ESK. Germline PALB2 Mutation in High-Risk Chinese Breast and/or Ovarian Cancer Patients. Cancers (Basel) 2021; 13:4195. [PMID: 34439348 PMCID: PMC8394494 DOI: 10.3390/cancers13164195] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/16/2021] [Accepted: 08/17/2021] [Indexed: 11/23/2022] Open
Abstract
The prevalence of the PALB2 mutation in breast cancer varies across different ethnic groups; hence, it is of intense interest to evaluate the cancer risk and clinical association of the PALB2 mutation in Chinese breast and/or ovarian cancer patients. We performed sequencing with a 6-gene test panel (BRCA1, BRCA2, TP53, PTEN, PALB2, and CDH1) to identify the prevalence of the PALB2 germline mutation among 2631 patients with breast and/or ovarian cancer. In this cohort, 39 mutations were identified with 24 types of mutation variants, where the majority of the mutations were frame-shift mutations and resulted in early termination. We also identified seven novel PALB2 mutations. Most of the PALB2 mutation carriers had breast cancer (36, 92.3%) and were more likely to have family history of breast cancer (19, 48.7%). The majority of the breast tumors were invasive ductal carcinoma (NOS type) (34, 81.0%) and hormonal positive (ER: 32, 84.2%; PR: 23, 60.5%). Pathogenic mutations of PALB2 were found in 39 probands with a mutation frequency of 1.6% and 1% in breast cancer and ovarian cancer patients, respectively. PALB2 mutation carriers were more likely have hormonal positive tumors and were likely to have familial aggregation of breast cancer.
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Affiliation(s)
- Ava Kwong
- Department of Surgery, The University of Hong Kong, Hong Kong, China; (V.Y.S.); (A.K.)
- University of Hong Kong-Shenzhen Hospital, Hong Kong, China
- Department of Surgery, Hong Kong Sanatorium & Hospital, Hong Kong, China
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong, China; (T.-L.C.); (E.S.K.M.)
| | - Vivian Y. Shin
- Department of Surgery, The University of Hong Kong, Hong Kong, China; (V.Y.S.); (A.K.)
- University of Hong Kong-Shenzhen Hospital, Hong Kong, China
| | - Cecilia Y. S. Ho
- Department of Pathology, Division of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, China; (C.Y.S.H.); (C.H.A.)
| | - Aleena Khalid
- Department of Surgery, The University of Hong Kong, Hong Kong, China; (V.Y.S.); (A.K.)
- University of Hong Kong-Shenzhen Hospital, Hong Kong, China
| | - Chun Hang Au
- Department of Pathology, Division of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, China; (C.Y.S.H.); (C.H.A.)
| | - Karen K. L. Chan
- Department of Obstetrics and Gynecology, The University of Hong Kong, Hong Kong, China; (K.K.L.C.); (H.Y.S.N.)
| | - Hextan Y. S. Ngan
- Department of Obstetrics and Gynecology, The University of Hong Kong, Hong Kong, China; (K.K.L.C.); (H.Y.S.N.)
| | - Tsun-Leung Chan
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong, China; (T.-L.C.); (E.S.K.M.)
- Department of Pathology, Division of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, China; (C.Y.S.H.); (C.H.A.)
| | - Edmond S. K. Ma
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong, China; (T.-L.C.); (E.S.K.M.)
- Department of Pathology, Division of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, China; (C.Y.S.H.); (C.H.A.)
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Kwong A, Shin VY, Chen J, Cheuk IWY, Ho CYS, Au CH, Chan KKL, Ngan HYS, Chan TL, Ford JM, Ma ESK. Germline Mutation in 1338 BRCA-Negative Chinese Hereditary Breast and/or Ovarian Cancer Patients: Clinical Testing with a Multigene Test Panel. J Mol Diagn 2020; 22:544-554. [PMID: 32068069 DOI: 10.1016/j.jmoldx.2020.01.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2019] [Revised: 12/16/2019] [Accepted: 01/14/2020] [Indexed: 12/23/2022] Open
Abstract
Differences in the mutation spectrum across ethnicities suggest the importance of identifying genes in addition to common high penetrant genes to estimate the associated breast cancer risk in China. A total of 1338 high-risk breast cancer patients who tested negative for germline BRCA1, BRCA2, TP53, and PTEN mutations between 2007 and 2017 were selected from the Hong Kong Hereditary Breast Cancer Family Registry. Patient samples were subjected to next-generation DNA sequencing using a multigene panel (Color Genomics). All detected pathogenic variants were validated by bidirectional DNA sequencing. The sequencing data were coanalyzed by a bioinformatics pipeline developed in-house. Sixty-one pathogenic variants (4.6%) were identified in this cohort in 11 cancer predisposition genes. Most carriers (77.1%) had early onset of breast cancer (age <45 years), 32.8% had family members with breast cancer, and 11.5% had triple-negative breast cancer. The most common mutated genes were PALB2 (1.4%), RAD51D (0.8%), and ATM (0.8%). A total of 612 variants of unknown significance were identified in 494 patients, and 87.4% of the variants of unknown significance were missense mutations. Pathogenic variants in cancer predisposition genes beyond BRCA1, BRCA2, TP53, and PTEN were detected in an additional 4.6% of patients using the multigene panel. PALB2 (1.4%) and RAD51D (0.8%) were the most commonly mutated genes in patients who tested mutation negative by a four-gene panel.
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Affiliation(s)
- Ava Kwong
- Department of Surgery, The University of Hong Kong and The University of Hong Kong-Shenzhen Hospital, Hong Kong Special Administrative Region; Department of Surgery, Hong Kong Sanatorium and Hospital, Hong Kong Special Administrative Region; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong Sanatorium and Hospital, Hong Kong Special Administrative Region.
| | - Vivian Y Shin
- Department of Surgery, The University of Hong Kong and The University of Hong Kong-Shenzhen Hospital, Hong Kong Special Administrative Region
| | - Jiawei Chen
- Department of Surgery, The University of Hong Kong and The University of Hong Kong-Shenzhen Hospital, Hong Kong Special Administrative Region
| | - Isabella W Y Cheuk
- Department of Surgery, The University of Hong Kong and The University of Hong Kong-Shenzhen Hospital, Hong Kong Special Administrative Region
| | - Cecilia Y S Ho
- Division of Molecular Pathology, Department of Pathology, Hong Kong Sanatorium and Hospital, Hong Kong Special Administrative Region
| | - Chun H Au
- Division of Molecular Pathology, Department of Pathology, Hong Kong Sanatorium and Hospital, Hong Kong Special Administrative Region
| | - Karen K L Chan
- Department of Obstetrics and Gynecology, The University of Hong Kong, Hong Kong Special Administrative Region
| | - Hextan Y S Ngan
- Department of Obstetrics and Gynecology, The University of Hong Kong, Hong Kong Special Administrative Region
| | - Tsun L Chan
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong Sanatorium and Hospital, Hong Kong Special Administrative Region; Division of Molecular Pathology, Department of Pathology, Hong Kong Sanatorium and Hospital, Hong Kong Special Administrative Region
| | - James M Ford
- Department of Medicine (Oncology), Stanford University School of Medicine, Stanford, California
| | - Edmond S K Ma
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong Sanatorium and Hospital, Hong Kong Special Administrative Region; Division of Molecular Pathology, Department of Pathology, Hong Kong Sanatorium and Hospital, Hong Kong Special Administrative Region
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Chen J, Shin VY, Cheuk I, Siu J, Kwong A. Abstract P1-07-01: Cholinergic receptor muscarinic 3 ( CHRM3) contributes to breast cancer tumorigenesis through angiogenesis regulation. Cancer Res 2020. [DOI: 10.1158/1538-7445.sabcs19-p1-07-01] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Objectives: Cholinergic muscarinic receptors are widely distributed in different human organs with various biological functionals such as synaptic transmission. Accumulating evidence revealed the overexpression of these receptors especially cholinergic receptor muscarinic 3 (CHRM3) with multiple roles in cancer behaviors such as proliferation, apoptosis, angiogenic phenotypes and even epithelial-mesenchymal transition (EMT) through various signaling pathways. However, its roles in breast cancer and angiogenesis still remain elusive.
Methods: Gene expression and patient survival data were from the TCGA and the GTEx projects database. Cells were transfected with scrambled shRNA or CHRM3 shRNA to knockdown gene expression. pcDNA1.3 empty expression vector or CHRM3 expressing vector was used for ectopic expression in the cells. Cell proliferation was examined in different treatment groups by MTT assay and further subjected to cell cycle and apoptosis assay. Expression levels of CHRM3 in paired breast cancer tissues and different cell lines as well as angiogenesis-related markers in cells with different treatments were investigated by qRT-PCR.
Results: CHRM3 expressions were significantly upregulated in triple negative breast cancer (TNBC) subtype, but not other subtypes of breast cancer, and was consistent with the data in TCGA database. Further investigation in different breast cancer cells revealed that CHRM3 expressions were higher in MDA-MB-231 and MDA-MB-468, which are both TNBC cell lines. After treatment with CHRM3-specific inhibitor, 4-DAMP, cell viability was significantly decreased in both MDA-MB-231 and MDA-MB-468 cells. G1-phase arrest and decreased S-phase cell populations and early apoptosis were increased upon 4-DAMP. Moreover, angiogenic markers such as ANG1 and VEGFD were significantly decreased upon CHRM3 knockdown in breast cancer cells or human umbilical vein endothelial cells (HUVEC). Gene correlation analysis from TCGA database indicated a significant positive correlation between CHRM3 and ANG1. Furthermore, CHRM3 shRNA or 4-DAMP treatment inhibited cell proliferation in both MDA-MB-231 and HUVEC.
Conclusions: We found that CHRM3 is upregulated in TNBC tissues and cell lines. CHRM3 confers tumor oncogenic roles, and for the first time, we identified a potential relationship between CHRM3 and angiogenesis in breast cancer. Further experiments are warranted to explore the underlying mechanism of CHRM3 in regulating angiogenesis.
Citation Format: Jiawei Chen, Vivian Y Shin, Isabella Cheuk, Jennifer Siu, Ava Kwong. Cholinergic receptor muscarinic 3 (CHRM3) contributes to breast cancer tumorigenesis through angiogenesis regulation [abstract]. In: Proceedings of the 2019 San Antonio Breast Cancer Symposium; 2019 Dec 10-14; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2020;80(4 Suppl):Abstract nr P1-07-01.
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Affiliation(s)
- Jiawei Chen
- The University of Hong Kong, Hong Kong, Hong Kong
| | | | | | - Jennifer Siu
- The University of Hong Kong, Hong Kong, Hong Kong
| | - Ava Kwong
- The University of Hong Kong, Hong Kong, Hong Kong
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Kwong A, Au CH, Ho DN, Wong EYL, Chung Y, Law FBF, Ho CYS, Chen J, Cheuk IW, Shin VY, Chan TL, Ngan HYS, Ma ESK. Abstract P6-08-13: Personalized and cost-effective detection of copy number variants by molecular-barcode next-generation sequencing and long-read nanopore sequencing. Cancer Res 2020. [DOI: 10.1158/1538-7445.sabcs19-p6-08-13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Germline copy number variants (CNV) of hereditary breast and ovarian cancer genes are a known class of clinically significant mutations. However, failure to detect CNV is a known limitation of Sanger sequencing and conventional amplicon next-generation sequencing (NGS). Multiplex ligation-dependent probe amplification (MLPA), while robust for CNV detection, is labor-intensive, costly to scale up and has limited breakpoint resolution at exon level only. We evaluated the clinical utility of molecular-barcode NGS and long-read nanopore sequencing in our genetic testing algorithm, specifically on CNV detection and breakpoint characterization of probands and family members. Methods: Both molecular-barcode NGS (BRCA1, BRCA2, TP53, PTEN, PALB2 and CDH1) and MLPA (BRCA1 and BRCA2) were performed in parallel on 200 high-risk breast and/or ovarian cancer probands and 11 CNV positive controls. CNV calling from MLPA and NGS data was performed by Coffalyser.Net and a novel in-house bioinformatics algorithm BAMClipper-SE, respectively. Nanopore amplicon or whole-genome sequencing was attempted to map the exact breakpoint of CNV controls and any newly identified CNV positive probands (up to May 2019). Personalized breakpoint PCR test for specific CNVs was designed and validated on probands and subsequently applied to corresponding family members for carrier testing. Results: Molecular-barcode NGS was 100% sensitive in detecting all BRCA1/2 CNVs from 11 positive controls. A total of 4 BRCA1/2 CNVs were detected by NGS from the 200 probands and matched the corresponding MLPA results. In addition, a PALB2 CNV (exons 4-6 deletion) was also detected by NGS during the parallel comparison. Up to May 2019, a total of 22 probands with detectable CNV in BRCA1, BRCA2, PALB2 or CHEK2 were accrued. Exact CNV breakpoint at nucleotide resolution was identified from 20 probands by nanopore and Sanger sequencing (BRCA1 n=12, BRCA2 n=5, PALB2 n=2 and CHEK2 n=1). High-resolution breakpoint mapping was applicable to inform variant pathogenicity and to enable recurrent CNV identification. Personalized breakpoint PCR designed for the 20 probands were applied to 42 family members, of whom 16 were CNV carriers and 26 were non-carriers. Breakpoint PCR results and any available MLPA results of these family members were 100% concordant. Conclusion: Molecular-barcode NGS allows a streamlined workflow to detect both sequence mutations and CNVs. It proves to be a reliable and cost-effective replacement of BRCA1/2 MLPA in genetic testing algorithm of new probands. Simultaneously the NGS workflow expands CNV detection coverage to additional genes (e.g. PALB2) without costly scale-up of MLPA gene panels. Nanopore sequencing is a practical alternative to MLPA in orthogonal validation of newly detected CNV. The high-resolution breakpoint mapping transforms CNV carrier testing to a personalized, simple and cost-effective breakpoint PCR.
Citation Format: Ava Kwong, Chun H Au, Dona N Ho, Elaine YL Wong, Yvonne Chung, Fian BF Law, Cecilia YS Ho, Jiawei Chen, Isabella W Cheuk, Vivian Y Shin, Tsun L Chan, Hextan YS Ngan, Edmond SK Ma. Personalized and cost-effective detection of copy number variants by molecular-barcode next-generation sequencing and long-read nanopore sequencing [abstract]. In: Proceedings of the 2019 San Antonio Breast Cancer Symposium; 2019 Dec 10-14; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2020;80(4 Suppl):Abstract nr P6-08-13.
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Affiliation(s)
- Ava Kwong
- 1The University of Hong Kong, Pokfulam, Hong Kong
| | - Chun H Au
- 2Hong Kong Sanatorium & Hospital, Happy Valley, Hong Kong
| | - Dona N Ho
- 2Hong Kong Sanatorium & Hospital, Happy Valley, Hong Kong
| | - Elaine YL Wong
- 2Hong Kong Sanatorium & Hospital, Happy Valley, Hong Kong
| | - Yvonne Chung
- 2Hong Kong Sanatorium & Hospital, Happy Valley, Hong Kong
| | - Fian BF Law
- 2Hong Kong Sanatorium & Hospital, Happy Valley, Hong Kong
| | - Cecilia YS Ho
- 2Hong Kong Sanatorium & Hospital, Happy Valley, Hong Kong
| | - Jiawei Chen
- 1The University of Hong Kong, Pokfulam, Hong Kong
| | | | | | - Tsun L Chan
- 2Hong Kong Sanatorium & Hospital, Happy Valley, Hong Kong
| | | | - Edmond SK Ma
- 2Hong Kong Sanatorium & Hospital, Happy Valley, Hong Kong
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Patel VL, Busch EL, Friebel TM, Cronin A, Leslie G, McGuffog L, Adlard J, Agata S, Agnarsson BA, Ahmed M, Aittomäki K, Alducci E, Andrulis IL, Arason A, Arnold N, Artioli G, Arver B, Auber B, Azzollini J, Balmaña J, Barkardottir RB, Barnes DR, Barroso A, Barrowdale D, Belotti M, Benitez J, Bertelsen B, Blok MJ, Bodrogi I, Bonadona V, Bonanni B, Bondavalli D, Boonen SE, Borde J, Borg A, Bradbury AR, Brady A, Brewer C, Brunet J, Buecher B, Buys SS, Cabezas-Camarero S, Caldés T, Caliebe A, Caligo MA, Calvello M, Campbell IG, Carnevali I, Carrasco E, Chan TL, Chu ATW, Chung WK, Claes KBM, Collaborators GS, Collaborators E, Cook J, Cortesi L, Couch FJ, Daly MB, Damante G, Darder E, Davidson R, de la Hoya M, Puppa LD, Dennis J, Díez O, Ding YC, Ditsch N, Domchek SM, Donaldson A, Dworniczak B, Easton DF, Eccles DM, Eeles RA, Ehrencrona H, Ejlertsen B, Engel C, Evans DG, Faivre L, Faust U, Feliubadaló L, Foretova L, Fostira F, Fountzilas G, Frost D, García-Barberán V, Garre P, Gauthier-Villars M, Géczi L, Gehrig A, Gerdes AM, Gesta P, Giannini G, Glendon G, Godwin AK, Goldgar DE, Greene MH, Gutierrez-Barrera AM, Hahnen E, Hamann U, Hauke J, Herold N, Hogervorst FBL, Honisch E, Hopper JL, Hulick PJ, Investigators KC, Investigators H, Izatt L, Jager A, James P, Janavicius R, Jensen UB, Jensen TD, Johannsson OT, John EM, Joseph V, Kang E, Kast K, Kiiski JI, Kim SW, Kim Z, Ko KP, Konstantopoulou I, Kramer G, Krogh L, Kruse TA, Kwong A, Larsen M, Lasset C, Lautrup C, Lazaro C, Lee J, Lee JW, Lee MH, Lemke J, Lesueur F, Liljegren A, Lindblom A, Llovet P, Lopez-Fernández A, Lopez-Perolio I, Lorca V, Loud JT, Ma ESK, Mai PL, Manoukian S, Mari V, Martin L, Matricardi L, Mebirouk N, Medici V, Meijers-Heijboer HEJ, Meindl A, Mensenkamp AR, Miller C, Gomes DM, Montagna M, Mooij TM, Moserle L, Mouret-Fourme E, Mulligan AM, Nathanson KL, Navratilova M, Nevanlinna H, Niederacher D, Nielsen FCC, Nikitina-Zake L, Offit K, Olah E, Olopade OI, Ong KR, Osorio A, Ott CE, Palli D, Park SK, Parsons MT, Pedersen IS, Peissel B, Peixoto A, Pérez-Segura P, Peterlongo P, Petersen AH, Porteous ME, Pujana MA, Radice P, Ramser J, Rantala J, Rashid MU, Rhiem K, Rizzolo P, Robson ME, Rookus MA, Rossing CM, Ruddy KJ, Santos C, Saule C, Scarpitta R, Schmutzler RK, Schuster H, Senter L, Seynaeve CM, Shah PD, Sharma P, Shin VY, Silvestri V, Simard J, Singer CF, Skytte AB, Snape K, Solano AR, Soucy P, Southey MC, Spurdle AB, Steele L, Steinemann D, Stoppa-Lyonnet D, Stradella A, Sunde L, Sutter C, Tan YY, Teixeira MR, Teo SH, Thomassen M, Tibiletti MG, Tischkowitz M, Tognazzo S, Toland AE, Tommasi S, Torres D, Toss A, Trainer AH, Tung N, van Asperen CJ, van der Baan FH, van der Kolk LE, van der Luijt RB, van Hest LP, Varesco L, Varon-Mateeva R, Viel A, Vierstraete J, Villa R, von Wachenfeldt A, Wagner P, Wang-Gohrke S, Wappenschmidt B, Weitzel JN, Wieme G, Yadav S, Yannoukakos D, Yoon SY, Zanzottera C, Zorn KK, D'Amico AV, Freedman ML, Pomerantz MM, Chenevix-Trench G, Antoniou AC, Neuhausen SL, Ottini L, Nielsen HR, Rebbeck TR. Association of Genomic Domains in BRCA1 and BRCA2 with Prostate Cancer Risk and Aggressiveness. Cancer Res 2020; 80:624-638. [PMID: 31723001 PMCID: PMC7553241 DOI: 10.1158/0008-5472.can-19-1840] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Revised: 08/07/2019] [Accepted: 11/08/2019] [Indexed: 12/15/2022]
Abstract
Pathogenic sequence variants (PSV) in BRCA1 or BRCA2 (BRCA1/2) are associated with increased risk and severity of prostate cancer. We evaluated whether PSVs in BRCA1/2 were associated with risk of overall prostate cancer or high grade (Gleason 8+) prostate cancer using an international sample of 65 BRCA1 and 171 BRCA2 male PSV carriers with prostate cancer, and 3,388 BRCA1 and 2,880 BRCA2 male PSV carriers without prostate cancer. PSVs in the 3' region of BRCA2 (c.7914+) were significantly associated with elevated risk of prostate cancer compared with reference bin c.1001-c.7913 [HR = 1.78; 95% confidence interval (CI), 1.25-2.52; P = 0.001], as well as elevated risk of Gleason 8+ prostate cancer (HR = 3.11; 95% CI, 1.63-5.95; P = 0.001). c.756-c.1000 was also associated with elevated prostate cancer risk (HR = 2.83; 95% CI, 1.71-4.68; P = 0.00004) and elevated risk of Gleason 8+ prostate cancer (HR = 4.95; 95% CI, 2.12-11.54; P = 0.0002). No genotype-phenotype associations were detected for PSVs in BRCA1. These results demonstrate that specific BRCA2 PSVs may be associated with elevated risk of developing aggressive prostate cancer. SIGNIFICANCE: Aggressive prostate cancer risk in BRCA2 mutation carriers may vary according to the specific BRCA2 mutation inherited by the at-risk individual.
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Affiliation(s)
- Vivek L Patel
- Department of Radiation Oncology, Dana-Farber Cancer Institute and Brigham and Women's Hospital, Boston, Massachusetts
| | - Evan L Busch
- Harvard T.H. Chan School of Public Health, Boston, Massachusetts
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Tara M Friebel
- Harvard T.H. Chan School of Public Health, Boston, Massachusetts
- Dana-Farber Cancer Institute. Boston, Massachusetts
| | - Angel Cronin
- Dana-Farber Cancer Institute. Boston, Massachusetts
| | - Goska Leslie
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom
| | - Lesley McGuffog
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom
| | - Julian Adlard
- Yorkshire Regional Genetics Service, Chapel Allerton Hospital, Leeds, United Kingdom
| | - Simona Agata
- Immunology and Molecular Oncology Unit, Veneto Institute of Oncology IOV - IRCCS, Padua, Italy
| | - Bjarni A Agnarsson
- Department of Pathology, Landspitali University Hospital, 101, Reykjavik, Iceland
- School of Medicine, University of Iceland, Reykjavik, Iceland
| | - Munaza Ahmed
- North East Thames Regional Genetics Service, Great Ormond Street Hospital for Children NHS Trust, London, United Kingdom
| | - Kristiina Aittomäki
- Department of Clinical Genetics, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
| | - Elisa Alducci
- Immunology and Molecular Oncology Unit, Veneto Institute of Oncology IOV - IRCCS, Padua, Italy
| | - Irene L Andrulis
- Fred A. Litwin Center for Cancer Genetics, Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, Ontario, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Adalgeir Arason
- Department of Pathology, Landspitali University Hospital, 101, Reykjavik, Iceland
- BMC (Biomedical Centre), Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - Norbert Arnold
- Department of Gynaecology and Obstetrics, University Hospital of Schleswig-Holstein, Campus Kiel, Christian-Albrechts University Kiel, Kiel, Germany
| | - Grazia Artioli
- ULSS 3 Serenissima, U.O.C. Oncologia ed Ematologia Oncologica, Mirano, Venice, Italy
| | - Brita Arver
- Department of Oncology, Karolinska Institutet, Stockholm, Sweden
| | - Bernd Auber
- Institute of Human Genetics, Hannover Medical School, Hannover, Germany
| | - Jacopo Azzollini
- Unit of Medical Genetics, Department of Medical Oncology and Hematology, Fondazione IRCCS (Istituto di Ricovero e Cura a Carattere Scientifico), Istituto Nazionale dei Tumori di Milano, Milan, Italy
| | - Judith Balmaña
- High Risk and Cancer Prevention Group, Vall d'Hebron Institute of Oncology, University Hospital Vall d'Hebron, Barcelona, Spain
| | - Rosa B Barkardottir
- Department of Pathology, Landspitali University Hospital, 101, Reykjavik, Iceland
- BMC (Biomedical Centre), Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - Daniel R Barnes
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom
| | - Alicia Barroso
- Human Genetics Group, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
| | - Daniel Barrowdale
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom
| | | | - Javier Benitez
- Human Cancer Genetics Programme, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
- Biomedical Network on Rare Diseases (CIBERER), Madrid, Spain
| | - Birgitte Bertelsen
- Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Marinus J Blok
- Department of Clinical Genetics, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Istvan Bodrogi
- Department of Chemotherapy, National Institute of Oncology, Budapest, Hungary
| | - Valérie Bonadona
- Unité de Prévention et d'Epidémiologie Génétique, Centre Léon Bérard, Lyon, France
| | - Bernardo Bonanni
- Division of Cancer Prevention and Genetics, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - Davide Bondavalli
- Division of Cancer Prevention and Genetics, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - Susanne E Boonen
- Clinical Genetic Unit, Department of Paediatrics, Zealand University Hospital, Roskilde, Denmark
| | - Julika Borde
- Center for Integrated Oncology (CIO), University Hospital of Cologne, Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
- Center for Hereditary Breast and Ovarian Cancer, University Hospital of Cologne, Cologne, Germany
| | - Ake Borg
- Department of Oncology, Lund University and Skåne University Hospital, Lund, Sweden
| | - Angela R Bradbury
- Department of Medicine, Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Angela Brady
- North West Thames Regional Genetics Service, Kennedy Galton Centre, The North West London Hospitals NHS Trust, Middlesex, United Kingdom
| | - Carole Brewer
- Department of Clinical Genetics, Royal Devon & Exeter Hospital, Exeter, United Kingdom
| | - Joan Brunet
- Genetic Counseling Unit, Hereditary Cancer Program, IDIBGI (Institut d'Investigació Biomèdica de Girona), Catalan Institute of Oncology, CIBERONC, Girona, Spain
| | | | - Saundra S Buys
- Department of Medicine, Huntsman Cancer Institute, Salt Lake City, Utah
| | | | - Trinidad Caldés
- Medical Oncology Department, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos (IdISSC), Centro Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
| | - Almuth Caliebe
- Institute of Human Genetics, University Hospital of Schleswig-Holstein, Campus Kiel, Christian-Albrechts University Kiel, Kiel, Germany
| | - Maria A Caligo
- Section of Molecular Genetics, Department of Laboratory Medicine, University Hospital of Pisa, Pisa, Italy
| | - Mariarosaria Calvello
- Division of Cancer Prevention and Genetics, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - Ian G Campbell
- Peter MacCallum Cancer Center, Melbourne, Victoria, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, Victoria, Australia
| | - Ileana Carnevali
- UO Anatomia Patologica, Ospedale di Circolo-Università dell'Insubria, Varese, Italy
| | - Estela Carrasco
- High Risk and Cancer Prevention Group, Vall d'Hebron Institute of Oncology, University Hospital Vall d'Hebron, Barcelona, Spain
| | - Tsun L Chan
- Hong Kong Hereditary Breast Cancer Family Registry, Cancer Genetics Centre, Happy Valley, Hong Kong
- Department of Pathology, Hong Kong Sanatorium and Hospital, Happy Valley, Hong Kong
| | - Annie T W Chu
- Hong Kong Hereditary Breast Cancer Family Registry, Cancer Genetics Centre, Happy Valley, Hong Kong
| | - Wendy K Chung
- Departments of Pediatrics and Medicine, Columbia University, New York, New York
| | | | | | - Embrace Collaborators
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom
| | - Jackie Cook
- Sheffield Clinical Genetics Service, Sheffield Children's Hospital, Sheffield, United Kingdom
| | - Laura Cortesi
- Department of Oncology and Haematology, University of Modena and Reggio Emilia, Modena, Italy
| | - Fergus J Couch
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota
| | - Mary B Daly
- Department of Clinical Genetics, Fox Chase Cancer Center, Philadelphia, Pennsylvania
| | - Giuseppe Damante
- Department of Medical and Biological Sciences, University of Udine, Udine, Italy
| | - Esther Darder
- Genetic Counseling Unit, Hereditary Cancer Program, IDIBGI (Institut d'Investigació Biomèdica de Girona), Catalan Institute of Oncology, CIBERONC, Girona, Spain
| | - Rosemarie Davidson
- Department of Clinical Genetics, South Glasgow University Hospitals, Glasgow, United Kingdom
| | - Miguel de la Hoya
- Medical Oncology Department, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos (IdISSC), Centro Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
| | - Lara Della Puppa
- Division of Functional Onco-genomics and Genetics, Centro di Riferimento Oncologico di Aviano (CRO), IRCCS, Aviano, Italy
| | - Joe Dennis
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom
| | - Orland Díez
- Oncogenetics Group, Clinical and Molecular Genetics Area, Vall d'Hebron Institute of Oncology (VHIO), University Hospital, Barcelona, Spain
| | - Yuan Chun Ding
- Department of Population Sciences, Beckman Research Institute of City of Hope, Duarte, California
| | - Nina Ditsch
- Department of Gynecology and Obstetrics, Ludwig Maximilian University of Munich, Munich, Germany
| | - Susan M Domchek
- Department of Medicine, Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Alan Donaldson
- Clinical Genetics Department, St Michael's Hospital, Bristol, United Kingdom
| | - Bernd Dworniczak
- Institute of Human Genetics, University of Münster, Münster, Germany
| | - Douglas F Easton
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom
- Centre for Cancer Genetic Epidemiology, Department of Oncology, University of Cambridge, Cambridge, United Kingdom
| | - Diana M Eccles
- Cancer Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Rosalind A Eeles
- Oncogenetics Team, The Institute of Cancer Research and Royal Marsden NHS Foundation Trust, Sutton, United Kingdom
| | - Hans Ehrencrona
- Department of Clinical Genetics, Lund University Hospital, Lund, Sweden
| | - Bent Ejlertsen
- Department of Oncology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Christoph Engel
- Institute for Medical Informatics, Statistics and Epidemiology, University of Leipzig, Leipzig, Germany
- LIFE - Leipzig Research Centre for Civilization Diseases, University of Leipzig, Leipzig, Germany
| | - D Gareth Evans
- Division of Evolution and Genomic Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health and Manchester Academic Health Science Centre, University of Manchester, Manchester, United Kingdom
- Manchester Centre for Genomic Medicine, St Mary's Hospital, Central Manchester University Hospitals NHS Foundation Trust and Manchester Academic Health Science Centre, Manchester, United Kingdom
| | - Laurence Faivre
- Unité d'oncogénétique, Centre de Lutte Contre le Cancer, Centre Georges-François Leclerc, Dijon, France
| | - Ulrike Faust
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
| | - Lídia Feliubadaló
- Molecular Diagnostic Unit, Hereditary Cancer Program, IDIBELL (Bellvitge Biomedical Research Institute), Catalan Institute of Oncology, CIBERONC, Barcelona, Spain
| | - Lenka Foretova
- Department of Cancer Epidemiology and Genetics, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - Florentia Fostira
- Molecular Diagnostics Laboratory, INRASTES, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - George Fountzilas
- Second Department of Medical Oncology, EUROMEDICA General Clinic of Thessaloniki, Aristotle University of Thessaloniki School of Medicine, Thessaloniki, Greece
| | - Debra Frost
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom
| | - Vanesa García-Barberán
- Medical Oncology Department, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos (IdISSC), Centro Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
| | - Pilar Garre
- Medical Oncology Department, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos (IdISSC), Centro Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
| | | | - Lajos Géczi
- Department of Chemotherapy, National Institute of Oncology, Budapest, Hungary
| | - Andrea Gehrig
- Centre of Familial Breast and Ovarian Cancer, Department of Medical Genetics, Institute of Human Genetics, University of Würzburg, Würzburg, Germany
| | - Anne-Marie Gerdes
- Department of Clinical Genetics, Rigshospitalet, Copenhagen, Denmark
| | - Paul Gesta
- Service Régional Oncogénétique Poitou-Charentes, CH Niort, Niort, France
| | - Giuseppe Giannini
- Department of Molecular Medicine, University La Sapienza, Rome, Italy
| | - Gord Glendon
- Fred A. Litwin Center for Cancer Genetics, Lunenfeld-Tanenbaum Research Institute of Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Andrew K Godwin
- Department of Pathology and Laboratory Medicine, Kansas University Medical Center, Kansas City, Kansas
| | - David E Goldgar
- Department of Dermatology, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, Utah
| | - Mark H Greene
- Clinical Genetics Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland
| | - Angelica M Gutierrez-Barrera
- Department of Breast Medical Oncology and Clinical Genetics Program, University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Eric Hahnen
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
- Center for Hereditary Breast and Ovarian Cancer, University Hospital of Cologne, Cologne, Germany
| | - Ute Hamann
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Jan Hauke
- Center for Integrated Oncology (CIO), University Hospital of Cologne, Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
- Center for Hereditary Breast and Ovarian Cancer, University Hospital of Cologne, Cologne, Germany
| | - Natalie Herold
- Center for Integrated Oncology (CIO), University Hospital of Cologne, Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
- Center for Hereditary Breast and Ovarian Cancer, University Hospital of Cologne, Cologne, Germany
| | - Frans B L Hogervorst
- Family Cancer Clinic, The Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital, Amsterdam, the Netherlands
| | - Ellen Honisch
- Department of Gynecology and Obstetrics, University Hospital Düsseldorf, Heinrich-Heine University Düsseldorf, Düsseldorf, Germany
| | - John L Hopper
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - Peter J Hulick
- Center for Medical Genetics, NorthShore University HealthSystem, Evanston, Illinois
- The University of Chicago Pritzker School of Medicine, Chicago, Illinois
| | - KConFab Investigators
- Peter MacCallum Cancer Center, Melbourne, Victoria, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, Victoria, Australia
| | - Hebon Investigators
- The Hereditary Breast and Ovarian Cancer Research Group Netherlands (HEBON), Coordinating center: The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Louise Izatt
- Clinical Genetics, Guy's and St Thomas' NHS Foundation Trust, London, United Kingdom
| | - Agnes Jager
- Department of Medical Oncology, Family Cancer Clinic, Erasmus MC Cancer Institute, Rotterdam, the Netherlands
| | - Paul James
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, Victoria, Australia
- Parkville Familial Cancer Centre, Peter MacCallum Cancer Center, Melbourne, Victoria, Australia
| | - Ramunas Janavicius
- Hematology, Oncology and Transfusion Medicine Center, Department of Molecular and Regenerative Medicine, Vilnius University Hospital Santariskiu Clinics, Vilnius, Lithuania
| | - Uffe Birk Jensen
- Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark
| | | | | | - Esther M John
- Division of Oncology, Department of Medicine, Stanford Cancer Institute, Stanford University School of Medicine, Stanford, California
| | - Vijai Joseph
- Clinical Genetics Research Lab, Department of Cancer Biology and Genetics, Memorial Sloan-Kettering Cancer Center, New York, New York
| | - Eunyoung Kang
- Department of Surgery, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Karin Kast
- Department of Gynecology and Obstetrics, Technical University of Dresden, Dresden, Germany
| | - Johanna I Kiiski
- Department of Obstetrics and Gynecology, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
| | - Sung-Won Kim
- Department of Surgery, Daerim Saint Mary's Hospital, Seoul, Korea
| | - Zisun Kim
- Department of Surgery, Soonchunhyang University Bucheon Hospital, Bucheon, Korea
| | - Kwang-Pil Ko
- Department of Preventive Medicine, Gacheon University College of Medicine, Incheon, Republic of Korea
| | - Irene Konstantopoulou
- Molecular Diagnostics Laboratory, INRASTES, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Gero Kramer
- Department of Urology, Medical University of Vienna, Vienna, Austria
| | - Lotte Krogh
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
| | - Torben A Kruse
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
| | - Ava Kwong
- Hong Kong Hereditary Breast Cancer Family Registry, Cancer Genetics Centre, Happy Valley, Hong Kong
- Department of Surgery, The University of Hong Kong, Pok Fu Lam, Hong Kong
- Department of Surgery, Hong Kong Sanatorium and Hospital, Happy Valley, Hong Kong
| | - Mirjam Larsen
- Center for Integrated Oncology (CIO), University Hospital of Cologne, Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
- Center for Hereditary Breast and Ovarian Cancer, University Hospital of Cologne, Cologne, Germany
| | - Christine Lasset
- Unité de Prévention et d'Epidémiologie Génétique, Centre Léon Bérard, Lyon, France
| | - Charlotte Lautrup
- Department of Clinical Genetics, Aalborg University Hospital, Aalborg, Denmark
| | - Conxi Lazaro
- Molecular Diagnostic Unit, Hereditary Cancer Program, IDIBELL (Bellvitge Biomedical Research Institute), Catalan Institute of Oncology, CIBERONC, Barcelona, Spain
| | - Jihyoun Lee
- Department of Surgery, Soonchunhyang University College of Medicine and Soonchunhyang University Hospital, Seoul, Korea
| | - Jong Won Lee
- Department of Surgery, Ulsan University College of Medicine and Asan Medical Center, Seoul, Korea
| | - Min Hyuk Lee
- Department of Surgery, Soonchunhyang University College of Medicine and Soonchunhyang University Hospital, Seoul, Korea
| | - Johannes Lemke
- Institute of Human Genetics, University Hospital Leipzig, Leipzig, Germany
| | - Fabienne Lesueur
- Service de Génétique, Institut Curie, Paris, France
- Genetic Epidemiology of Cancer Team, Inserm U900, Paris, France
- Institut Curie, Paris, France
- Mines ParisTech, Fontainebleau, France
| | | | - Annika Lindblom
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Genetics, Karolinska University Hospital, Stockholm, Sweden
| | - Patricia Llovet
- Medical Oncology Department, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos (IdISSC), Centro Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
| | - Adria Lopez-Fernández
- High Risk and Cancer Prevention Group, Vall d'Hebron Institute of Oncology, University Hospital Vall d'Hebron, Barcelona, Spain
| | - Irene Lopez-Perolio
- Medical Oncology Department, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos (IdISSC), Centro Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
| | - Victor Lorca
- Medical Oncology Department, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria San Carlos (IdISSC), Centro Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
| | - Jennifer T Loud
- Clinical Genetics Branch, Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland
| | - Edmond S K Ma
- Hong Kong Hereditary Breast Cancer Family Registry, Cancer Genetics Centre, Happy Valley, Hong Kong
- Department of Pathology, Hong Kong Sanatorium and Hospital, Happy Valley, Hong Kong
| | - Phuong L Mai
- Magee-Womens Hospital, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Siranoush Manoukian
- Unit of Medical Genetics, Department of Medical Oncology and Hematology, Fondazione IRCCS (Istituto di Ricovero e Cura a Carattere Scientifico), Istituto Nazionale dei Tumori di Milano, Milan, Italy
| | - Veronique Mari
- Département d'Hématologie-Oncologie Médicale, Centre Antoine Lacassagne, Nice, France
| | - Lynn Martin
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Laura Matricardi
- Immunology and Molecular Oncology Unit, Veneto Institute of Oncology IOV - IRCCS, Padua, Italy
| | - Noura Mebirouk
- Service de Génétique, Institut Curie, Paris, France
- Genetic Epidemiology of Cancer Team, Inserm U900, Paris, France
- Institut Curie, Paris, France
- Mines ParisTech, Fontainebleau, France
| | - Veronica Medici
- Department of Oncology and Haematology, University of Modena and Reggio Emilia, Modena, Italy
| | | | - Alfons Meindl
- Department of Gynecology and Obstetrics, Ludwig Maximilian University of Munich, Munich, Germany
| | - Arjen R Mensenkamp
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, the Netherlands
| | - Clare Miller
- Department of Clinical Genetics, Alder Hey Hospital, Liverpool, United Kingdom
| | - Denise Molina Gomes
- Service de Biologie de la Reproduction, Cytogénétique et Génétique Médicale, CHI Poissy - Saint Germain, Poissy, France
| | - Marco Montagna
- Immunology and Molecular Oncology Unit, Veneto Institute of Oncology IOV - IRCCS, Padua, Italy
| | - Thea M Mooij
- Department of Epidemiology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Lidia Moserle
- Immunology and Molecular Oncology Unit, Veneto Institute of Oncology IOV - IRCCS, Padua, Italy
| | | | - Anna Marie Mulligan
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
- Laboratory Medicine Program, University Health Network, Toronto, Ontario, Canada
| | - Katherine L Nathanson
- Department of Medicine, Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Marie Navratilova
- Department of Cancer Epidemiology and Genetics, Masaryk Memorial Cancer Institute, Brno, Czech Republic
| | - Heli Nevanlinna
- Department of Obstetrics and Gynecology, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
| | - Dieter Niederacher
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - Finn C Cilius Nielsen
- Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | | | - Kenneth Offit
- Department of Surgery, Seoul National University Bundang Hospital, Seongnam, Korea
- Clinical Genetics Service, Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, New York
| | - Edith Olah
- Department of Molecular Genetics, National Institute of Oncology, Budapest, Hungary
| | | | - Kai-Ren Ong
- West Midlands Regional Genetics Service, Birmingham Women's Hospital Healthcare NHS Trust, Birmingham, United Kingdom
| | - Ana Osorio
- Human Cancer Genetics Programme, Spanish National Cancer Research Centre (CNIO), Madrid, Spain
- Biomedical Network on Rare Diseases (CIBERER), Madrid, Spain
| | - Claus-Eric Ott
- Institute for Medical Genetics and Human Genetics, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Domenico Palli
- Cancer Risk Factors and Life-Style Epidemiology Unit, Institute for Cancer Research, Prevention and Clinical Network (ISPRO), Florence, Italy
| | - Sue K Park
- Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Korea
- Department of Biomedical Sciences, Seoul National University Graduate School, Seoul, Korea
- Cancer Research Institute, Seoul National University, Seoul, Korea
| | - Michael T Parsons
- Department of Genetics and Computational Biology, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Inge Sokilde Pedersen
- Section of Molecular Diagnostics, Clinical Biochemistry, Aalborg University Hospital, Aalborg, Denmark
| | - Bernard Peissel
- Unit of Medical Genetics, Department of Medical Oncology and Hematology, Fondazione IRCCS (Istituto di Ricovero e Cura a Carattere Scientifico), Istituto Nazionale dei Tumori di Milano, Milan, Italy
| | - Ana Peixoto
- Department of Genetics, Portuguese Oncology Institute, Porto, Portugal
| | - Pedro Pérez-Segura
- Department of Oncology, Hospital Clinico San Carlos, IdISSC, Madrid, Spain
| | - Paolo Peterlongo
- Genome Diagnostics Program, IFOM - the FIRC (Italian Foundation for Cancer Research) Institute of Molecular Oncology, Milan, Italy
| | | | - Mary E Porteous
- South East of Scotland Regional Genetics Service, Western General Hospital, Edinburgh, United Kingdom
| | - Miguel Angel Pujana
- Translational Research Laboratory, IDIBELL (Bellvitge Biomedical Research Institute), Catalan Institute of Oncology, CIBERONC, Barcelona, Spain
| | - Paolo Radice
- Unit of Molecular Bases of Genetic Risk and Genetic Testing, Department of Research, in Fondazione IRCCS (Istituto Di Ricovero e Cura a Carattere Scientifico) Istituto Nazionale dei Tumori (INT), Milan, Italy
| | - Juliane Ramser
- Division of Gynaecology and Obstetrics, Klinikum rechts der Isar der Technischen Universität München, Munich, Germany
| | | | - Muhammad U Rashid
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Department of Basic Sciences, Shaukat Khanum Memorial Cancer Hospital and Research Centre (SKMCH & RC), Lahore, Pakistan
| | - Kerstin Rhiem
- Center for Integrated Oncology (CIO), University Hospital of Cologne, Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
- Center for Hereditary Breast and Ovarian Cancer, University Hospital of Cologne, Cologne, Germany
| | - Piera Rizzolo
- Department of Molecular Medicine, University La Sapienza, Rome, Italy
| | - Mark E Robson
- Clinical Genetics Service, Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, New York
| | - Matti A Rookus
- Department of Epidemiology, The Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - Caroline M Rossing
- Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | | | - Catarina Santos
- Department of Genetics, Portuguese Oncology Institute, Porto, Portugal
| | - Claire Saule
- Service de Génétique, Institut Curie, Paris, France
| | - Rosa Scarpitta
- Section of Genetic Oncology, Department of Laboratory Medicine, University and University Hospital of Pisa, Pisa, Italy
| | - Rita K Schmutzler
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
- Center for Hereditary Breast and Ovarian Cancer, University Hospital of Cologne, Cologne, Germany
| | - Hélène Schuster
- Unité d'Oncogénétique, Centre de Lutte Contre le Cancer Paul Strauss, Strasbourg, France
| | - Leigha Senter
- Clinical Cancer Genetics Program, Division of Human Genetics, Department of Internal Medicine, The Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio
| | - Caroline M Seynaeve
- Department of Medical Oncology, Family Cancer Clinic, Erasmus MC Cancer Institute, Rotterdam, the Netherlands
| | - Payal D Shah
- Department of Medicine, Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania
| | - Priyanka Sharma
- Department of Internal Medicine, Division of Oncology, University of Kansas Medical Center, Westwood, Kansas
| | - Vivian Y Shin
- Department of Surgery, The University of Hong Kong, Pok Fu Lam, Hong Kong
| | | | - Jacques Simard
- Genomics Center, Centre Hospitalier Universitaire de Québec - Université Laval, Research Centre, Québec City, Québec, Canada
| | - Christian F Singer
- Dept of OB/GYN and Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | | | - Katie Snape
- Medical Genetics Unit, St George's, University of London, London, United Kingdom
| | - Angela R Solano
- INBIOMED, Faculty of Medicine/CONICET and CEMIC, Department of Clinical Chemistry, Medical Direction, University of Buenos Aires, Buenos Aires, Argentina
| | - Penny Soucy
- Department of Internal Medicine, Division of Oncology, University of Kansas Medical Center, Westwood, Kansas
| | - Melissa C Southey
- Precision Medicine, School of Clinical Sciences at Monash Health, Monash University, Clayton, Victoria, Australia
- Department of Clinical Pathology, The University of Melbourne, Melbourne, Victoria, Australia
| | - Amanda B Spurdle
- Department of Genetics and Computational Biology, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Linda Steele
- Department of Population Sciences, Beckman Research Institute of City of Hope, Duarte, California
| | - Doris Steinemann
- Institute of Cell and Molecular Pathology, Hannover Medical School, Hannover, Germany
| | - Dominique Stoppa-Lyonnet
- Service de Génétique, Institut Curie, Paris, France
- Department of Tumour Biology, INSERM U830, Paris, France
- Université Paris Descartes, Paris, France
| | - Agostina Stradella
- Genetic Counseling Unit, Hereditary Cancer Program, IDIBELL (Bellvitge Biomedical Research Institute), Catalan Institute of Oncology, CIBERONC, Barcelona, Spain
| | - Lone Sunde
- Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark
| | - Christian Sutter
- Institute of Human Genetics, University Hospital Heidelberg, Heidelberg, Germany
| | - Yen Y Tan
- Department of OB/GYN, Medical University of Vienna, Vienna, Austria
| | - Manuel R Teixeira
- Department of Genetics, Portuguese Oncology Institute, Porto, Portugal
- Biomedical Sciences Institute (ICBAS), University of Porto, Porto, Portugal
| | - Soo Hwang Teo
- Cancer Research Malaysia, Subang Jaya, Selangor, Malaysia
- Breast Cancer Research Unit, Cancer Research Institute, University Malaya Medical Centre, Kuala Lumpur, Malaysia
| | - Mads Thomassen
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
| | | | - Marc Tischkowitz
- Program in Cancer Genetics, Departments of Human Genetics and Oncology, McGill University, Montréal, Quebec, Canada
- Department of Medical Genetics, University of Cambridge, Cambridge, United Kingdom
| | - Silvia Tognazzo
- Immunology and Molecular Oncology Unit, Veneto Institute of Oncology IOV - IRCCS, Padua, Italy
| | - Amanda E Toland
- Department of Cancer Biology and Genetics, The Ohio State University, Columbus, Ohio
| | | | - Diana Torres
- Molecular Genetics of Breast Cancer, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Institute of Human Genetics, Pontificia Universidad Javeriana, Bogota, Colombia
| | - Angela Toss
- Department of Oncology and Haematology, University of Modena and Reggio Emilia, Modena, Italy
| | - Alison H Trainer
- Parkville Familial Cancer Centre, Peter MacCallum Cancer Center, Melbourne, Victoria, Australia
| | - Nadine Tung
- Department of Medical Oncology, Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - Christi J van Asperen
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, the Netherlands
| | | | - Lizet E van der Kolk
- Family Cancer Clinic, The Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital, Amsterdam, the Netherlands
| | - Rob B van der Luijt
- Department of Medical Genetics, University Medical Center, Utrecht, the Netherlands
| | - Liselotte P van Hest
- Clinical Genetics, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - Liliana Varesco
- Unit of Hereditary Cancer, Department of Epidemiology, Prevention and Special Functions, IRCCS (Istituto di Ricovero e Cura a Carattere Scientifico) AOU San Martino, IST Istituto Nazionale per la Ricerca sul Cancro, Genoa, Italy
| | - Raymonda Varon-Mateeva
- Institute for Medical Genetics and Human Genetics, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Alessandra Viel
- Division of Functional Onco-genomics and Genetics, Centro di Riferimento Oncologico di Aviano (CRO), IRCCS, Aviano, Italy
| | | | - Roberta Villa
- Unit of Medical Genetics, Department of Medical Oncology and Hematology, Fondazione IRCCS (Istituto di Ricovero e Cura a Carattere Scientifico), Istituto Nazionale dei Tumori di Milano, Milan, Italy
| | | | - Philipp Wagner
- Department of Women's Health, Tubingen University Hospital, Tubingen, Germany
| | - Shan Wang-Gohrke
- Department of Gynaecology and Obstetrics, University Hospital Ulm, Ulm, Germany
| | - Barbara Wappenschmidt
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
- Center for Hereditary Breast and Ovarian Cancer, University Hospital of Cologne, Cologne, Germany
| | | | - Greet Wieme
- Centre for Medical Genetics, Ghent University, Ghent, Belgium
| | | | - Drakoulis Yannoukakos
- Molecular Diagnostics Laboratory, INRASTES, National Centre for Scientific Research "Demokritos", Athens, Greece
| | - Sook-Yee Yoon
- Cancer Research Initiatives Foundation, Sime Darby Medical Centre, Subang Jaya, Selangor, Malaysia
| | - Cristina Zanzottera
- Unit of Medical Genetics, Department of Medical Oncology and Hematology, Fondazione IRCCS (Istituto di Ricovero e Cura a Carattere Scientifico), Istituto Nazionale dei Tumori di Milano, Milan, Italy
| | - Kristin K Zorn
- Magee-Womens Hospital, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Anthony V D'Amico
- Department of Radiation Oncology, Dana-Farber Cancer Institute and Brigham and Women's Hospital, Boston, Massachusetts
| | | | | | - Georgia Chenevix-Trench
- Department of Genetics and Computational Biology, QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia
| | - Antonis C Antoniou
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom
| | - Susan L Neuhausen
- Department of Population Sciences, Beckman Research Institute of City of Hope, Duarte, California
| | - Laura Ottini
- Department of Molecular Medicine, University La Sapienza, Rome, Italy
| | | | - Timothy R Rebbeck
- Harvard T.H. Chan School of Public Health, Boston, Massachusetts.
- Dana-Farber Cancer Institute. Boston, Massachusetts
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Dai D, Shi R, Wang Z, Zhong Y, Shin VY, Jin H, Wang X. Competing Risk Analyses of Medullary Carcinoma of Breast in Comparison to Infiltrating Ductal Carcinoma. Sci Rep 2020; 10:560. [PMID: 31953417 PMCID: PMC6969020 DOI: 10.1038/s41598-019-57168-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Accepted: 12/19/2019] [Indexed: 12/29/2022] Open
Abstract
The aim of current study was to use competing risk model to assess whether medullary carcinoma of the breast (MCB) has a better prognosis than invasive ductal carcinomas of breast cancer (IDC), and to build a competing risk nomogram for predicting the risk of death of MCB. We involved 3,580 MCB patients and 319,566 IDC patients from Surveillance, Epidemiology, and End Results (SEER) database. IDC was found to have a worse BCSS than MCB (Hazard ratio (HR) > 1, p < 0.001). The 5-year cumulative incidences of death (CID) was higher in IDC than MCB (p < 0.001). Larger tumor size, increasing number of positive lymph nodes and unmarried status were found to worsen the BCSS of MCB (HR > 1, p < 0.001). We found no association between ER, PR, radiotherapy or chemotherapy and MCB prognosis (p > 0.05). After a penalized variable selection process, the SH model-based nomogram showed moderate accuracy of prediction by internal validation of discrimination and calibration with 1,000 bootstraps. In summary, MCB patients had a better prognosis than IDC patients. Interestingly, unmarried status in addition to expected risk factors such as larger tumor size and increasing number of positive lymph nodes were found to worsen the BCSS of MCB. We also established a competing risk nomogram as an easy-to-use tool for prognostic estimation of MCB patients.
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Affiliation(s)
- Dongjun Dai
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Rongkai Shi
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Zhuo Wang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Yiming Zhong
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Vivian Y Shin
- Department of Surgery, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong SAR, China
| | - Hongchuan Jin
- Laboratory of Cancer Biology, Key Lab of Biotherapy, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Xian Wang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China.
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9
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Leung WK, Shin VY, Law WL. Detection of methylated septin 9 DNA in blood for diagnosis, prognosis, and surveillance of colorectal cancer. Hong Kong Med J 2019; 25 Suppl 9:32-34. [PMID: 31889033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023] Open
Affiliation(s)
- W K Leung
- Department of Medicine, Queen Mary Hospital, The University of Hong Kong
| | - V Y Shin
- Department of Surgery, Queen Mary Hospital, The University of Hong Kong
| | - W L Law
- Department of Surgery, Queen Mary Hospital, The University of Hong Kong
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10
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Zhu L, Zhu Y, Han S, Chen M, Song P, Dai D, Xu W, Jiang T, Feng L, Shin VY, Wang X, Jin H. Impaired autophagic degradation of lncRNA ARHGAP5-AS1 promotes chemoresistance in gastric cancer. Cell Death Dis 2019; 10:383. [PMID: 31097692 PMCID: PMC6522595 DOI: 10.1038/s41419-019-1585-2] [Citation(s) in RCA: 118] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 03/18/2019] [Accepted: 04/08/2019] [Indexed: 01/08/2023]
Abstract
Chemoresistance remains the uppermost disincentive for cancer treatment on account of many genetic and epigenetic alterations. Long non-coding RNAs (lncRNAs) are emerging players in promoting cancer initiation and progression. However, the regulation and function in chemoresistance are largely unknown. Herein, we identified ARHGAP5-AS1 as a lncRNA upregulated in chemoresistant gastric cancer cells and its knockdown reversed chemoresistance. Meanwhile, high ARHGAP5-AS1 expression was associated with poor prognosis of gastric cancer patients. Intriguingly, its abundance is affected by autophagy and SQSTM1 is responsible for transporting ARHGAP5-AS1 to autophagosomes. Inhibition of autophagy in chemoresistant cells, thus, resulted in the upregulation of ARHGAP5-AS1. In turn, it activated the transcription of ARHGAP5 in the nucleus by directly interacting with ARHGAP5 promoter. Interestingly, ARHGAP5-AS1 also stabilized ARHGAP5 mRNA in the cytoplasm by recruiting METTL3 to stimulate m6A modification of ARHGAP5 mRNA. As a result, ARHGAP5 was upregulated to promote chemoresistance and its upregulation was also associated with poor prognosis in gastric cancer. In summary, impaired autophagic degradation of lncRNA ARHGAP5-AS1 in chemoresistant cancer cells promoted chemoresistance. It can activate the transcription of ARHGAP5 in the nucleus and stimulate m6A modification of ARHGAP5 mRNA to stabilize ARHGAP5 mRNA in the cytoplasm by recruiting METTL3. Therefore, targeting ARHGAP5-AS1/ARHGAP5 axis might be a promising strategy to overcome chemoresistance in gastric cancer.
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Affiliation(s)
- Liyuan Zhu
- Laboratory of Cancer Biology, Key Laboratory of Biotherapy of Zhejiang Province, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Yiran Zhu
- Laboratory of Cancer Biology, Key Laboratory of Biotherapy of Zhejiang Province, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Shuting Han
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Miaoqin Chen
- Laboratory of Cancer Biology, Key Laboratory of Biotherapy of Zhejiang Province, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Ping Song
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Dongjun Dai
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Wenxia Xu
- Laboratory of Cancer Biology, Key Laboratory of Biotherapy of Zhejiang Province, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Tingting Jiang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Lifeng Feng
- Laboratory of Cancer Biology, Key Laboratory of Biotherapy of Zhejiang Province, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Vivian Y Shin
- Department of Surgery, the University of Hong Kong, Hong Kong SAR, China
| | - Xian Wang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Hongchuan Jin
- Laboratory of Cancer Biology, Key Laboratory of Biotherapy of Zhejiang Province, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China.
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11
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Shin VY, Siu MT, Cheuk I, Kwong A. Abstract 4415: Characterization of tumor-derived exosomes in BRCA-associated breast tumors. Cancer Res 2018. [DOI: 10.1158/1538-7445.am2018-4415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: BRCA-mutated tumors are usually with higher grade than sporadic tumors and the biology is poorly understood. Exosomes are small membrane-derived vesicles that function to mediate cell-cell communication via the transfer of tumor-promoting microRNAs (miRNAs), RNAs and proteins. Interestingly, different spectrum of miRNAs is released by cancer cells to promote tumor growth and metastasis in breast cancer. However, the selectivity of miRNA released from tumor-derived exosomes and its relevance in cancer treatment has not been widely studied. Hence, this study is sought to characterize the role of exosomal-miRNA (exo-miR) for the development of BRCA-associated tumors. Methods: Plasma samples from patients with BRCA-positive and non-BRCA carriers were recruited and selected from the Hong Kong Hereditary Breast Cancer Family Registry. By using miRCURY LNA array, the exosomal-miRNA expressions in plasma of patient with BRCA-positive (n=4) and non-carriers (n=4), as well as healthy controls (n=4) were profiled. Selected miRNAs were further validated in pre- and post-operative plasma and paired primary tissues (n=40) using real-time RT-PCR. Functional study of miRNA was also carried out in the cell lines. Results: LNA array data showed that differential expressed BRCA-associated exo-miRNAs were identified. Upregulated miRs (miR-106a, miR-20a, miR-23a, miR-451 and miR-486) were validated in BRCA-positive, BRCA-negative and healthy controls by real-time RT-PCR. In addition, the expression levels of miR-106a, miR-451 and miR-486 were significantly lower in post-operative plasma of BRCA-carriers than non-carriers. Importantly, the expression of miR-451 was reduced after tumor resection in BRCA mutation carriers. In parallel, high expression of exo-miR-106a, miR-20a, miR-23a, miR-451 and miR-486 were also seen in breast cancer cell lines (MB-231 and MB-468) relative to normal breast cells (MCF-10A). We found that cells transfected with miR-451 inhibitor significantly reduce cell proliferation. Conclusions: These preliminary results reveal differential exo-miRNA profiles between BRCA carriers and non-carriers with breast cancer, and identify potential targets of dysregulated miRNAs which is crucial in disease progression of BRCA-associated breast cancers.
Citation Format: Vivian Y. Shin, Man-Ting Siu, Isabella Cheuk, Ava Kwong. Characterization of tumor-derived exosomes in BRCA-associated breast tumors [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 4415.
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Affiliation(s)
| | | | | | - Ava Kwong
- University of Hong Kong, Pokfulam, Hong Kong
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12
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Kwong A, Shin VY, Ma ES, Chan CT, Ford JM, Kurian AW, Tai E. Screening for founder and recurrent BRCA mutations in Hong Kong and US Chinese populations. Hong Kong Med J 2018; 24 Suppl 3:4-6. [PMID: 29937436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023] Open
Affiliation(s)
- A Kwong
- Department of Surgery, The University of Hong Kong
| | - V Y Shin
- Department of Surgery, The University of Hong Kong
| | - E Sk Ma
- Department of Surgery, The University of Hong Kong
| | - C Tl Chan
- Department of Surgery, The University of Hong Kong
| | - J M Ford
- Department of Surgery, The University of Hong Kong
| | - A W Kurian
- Department of Surgery, The University of Hong Kong
| | - E Tai
- Department of Surgery, The University of Hong Kong
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13
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Zhang L, Shin VY, Chai X, Zhang A, Chan TL, Ma ES, Rebbeck TR, Chen J, Kwong A. Breast and ovarian cancer penetrance of BRCA1/2 mutations among Hong Kong women. Oncotarget 2018; 9:25025-25033. [PMID: 29861850 PMCID: PMC5982775 DOI: 10.18632/oncotarget.24382] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 01/03/2018] [Indexed: 11/25/2022] Open
Abstract
Germline mutations in BRCA1 and BRCA2 (BRCA1/2) are associated with increased risk of breast and ovarian cancer. The penetrance of breast and ovarian cancer in BRCA1/2 mutation carriers has been well characterized in Caucasian but not in Asian. Two studies have investigated the breast cancer risk in Asian women with BRCA1/2 mutations, and no published estimates are available for ovarian cancer. Therefore, we estimated the age-specific cumulative risk of BRCA1/2-associated breast and ovarian cancer in Chinese women. From Jan 2007 to Nov 2015, the Hong Kong Hereditary Breast Cancer Family Registry identified 1635 families with hereditary breast-ovarian cancer. Among probands in these families, 66 had BRCA1 mutations, 84 had BRCA2 mutations, and 1,485 tested negative for BRCA1/2 mutations. Using the female first-degree relatives of these probands, we estimated the risk of breast and ovarian cancer using a modified marginal likelihood approach. Estimates of breast cancer penetrance by age 70 were 53.7% (95% CI 34.5-71.6%) for BRCA1 mutation carriers and 48.3% (95% CI 31.8-68.5%) for BRCA2. The estimated risk of ovarian cancer by age 70 was 21.5% and 7.3% for Chinese women carrying BRCA1 or BRCA2 mutation respectively. A meta-analysis of available studies in Asian women revealed pooled estimates of breast cancer risk by age 70 of 44.8% (95% CI 33-57.2%) and 40.7% (95% CI 31.3-50.9%) for BRCA1 and BRCA2 mutation carriers respectively. These data suggest that BRCA1/2-associated breast cancer risk for Chinese women is similar to that for Caucasian women, although BRCA1/2-associated ovarian cancer risks are lower for Chinese women.
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Affiliation(s)
- LingJiao Zhang
- Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Vivian Y. Shin
- Department of Surgery, the University of Hong Kong, Hong Kong
| | - Xinglei Chai
- Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | | | - Tsun L. Chan
- Department of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong
| | - Edmond S. Ma
- Department of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong
| | - Timothy R. Rebbeck
- Dana Farber Cancer Institute and Harvard TH Chan School of Public Health, Boston, MA, USA
| | - Jinbo Chen
- Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Ava Kwong
- Department of Surgery, the University of Hong Kong, Hong Kong
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong
- Department of Surgery, Hong Kong Sanatorium & Hospital, Hong Kong
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14
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Li J, Song P, Jiang T, Dai D, Wang H, Sun J, Zhu L, Xu W, Feng L, Shin VY, Morrison H, Wang X, Jin H. Heat Shock Factor 1 Epigenetically Stimulates Glutaminase-1-Dependent mTOR Activation to Promote Colorectal Carcinogenesis. Mol Ther 2018; 26:1828-1839. [PMID: 29730197 DOI: 10.1016/j.ymthe.2018.04.014] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 04/01/2018] [Accepted: 04/10/2018] [Indexed: 01/05/2023] Open
Abstract
Heat shock factor 1 (HSF1) generally exhibits its properties under stress conditions. In tumors, HSF1 has a pleiotropic feature in regulating growth, survival, and aggressiveness of cancer cells. In this study, we found HSF1 was increased in colorectal cancer (CRC) and had a positive correlation with shorter disease-free survival (DFS). Knockdown of HSF1 in CRC cells attenuated their growth while inhibiting mTOR activation and glutamine metabolism. HSF1 inhibited the expression of microRNA137 (MIR137), which targeted GLS1 (glutaminase 1), thus stimulating GLS1 protein expression to promote glutaminolysis and mTOR activation. HSF1 bound DNA methyltransferase DNMT3a and recruited it to the promoter of lncRNA MIR137 host gene (MIR137HG), suppressing the generation of primary MIR137. The chemical inhibitor of HSF1 also reduced cell growth, increased apoptosis, and impaired glutamine metabolism in vitro. Moreover, both chemical inhibition and genetic knockout of HSF1 succeeded in increasing MIR137 expression, reducing GLS1 expression, and alleviating colorectal tumorigenesis in azoxymethane (AOM)/dextran sulfate sodium (DSS) mice. In conclusion, HSF1 expression was increased and associated with poor prognosis in CRC. By recruiting DNMT3a to suppress the expression of MIR137 that targets GLS1 mRNA, HSF1 stimulated GLS1-dependent mTOR activation to promote colorectal carcinogenesis. Therefore, targeting HSF1 to attenuate glutaminolysis and mTOR activation could be a promising approach for CRC treatment.
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Affiliation(s)
- Jiaqiu Li
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Ping Song
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Tingting Jiang
- Laboratory of Cancer Biology, Key Lab of Zhejiang Biotherapy, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Dongjun Dai
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Hanying Wang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Jie Sun
- Laboratory of Cancer Biology, Key Lab of Zhejiang Biotherapy, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Liyuan Zhu
- Laboratory of Cancer Biology, Key Lab of Zhejiang Biotherapy, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Wenxia Xu
- Laboratory of Cancer Biology, Key Lab of Zhejiang Biotherapy, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Lifeng Feng
- Laboratory of Cancer Biology, Key Lab of Zhejiang Biotherapy, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Vivian Y Shin
- Department of Surgery, Faculty of Medicine, The University of Hong Kong, Hong Kong
| | - Helen Morrison
- Leibniz Institute on Aging, Fritz Lipmann Institute (FLI), Jena, Germany
| | - Xian Wang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China.
| | - Hongchuan Jin
- Laboratory of Cancer Biology, Key Lab of Zhejiang Biotherapy, Sir Run Run Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China.
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15
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Ho JC, Shin VY, Chen J, Siu MT, Cheuk I, Kwong A. Abstract A046: miR-199a-3p induces BRCA1 dysfunction in triple-negative breast cancer. Mol Cancer Ther 2018. [DOI: 10.1158/1535-7163.targ-17-a046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: BRCA1 mutations are highly susceptible to familial breast and ovarian cancer, as well as the more aggressive triple-negative breast cancer (TNBC). However, DNA repair defects caused by BRCA dysfunction were reported to have better response to platinum-based chemotherapy and PARP inhibitors. Increasing evidence suggest the roles of miRNAs in regulating BRCA1 functions, with emphasis on cancer progression and therapeutic sensitivity. We previously identified miR-199a-3p as a potential TNBC biomarker, and BRCA1 is the putative downstream target based on in silico prediction. In this study, we aim to investigate the functionalities of miR-199a-3p in TNBC. Methods: The correlation between BRCA1 and miR-199a-3p was investigated through expression analysis of 32 TNBC tumor specimens, and further confirmed by dual-luciferase reporter assay. The functionalities of miR-199a-3p in TNBC cells were assessed by MTT cell proliferation, migration, and clonogenic assays. The effects of miR-199a-3p on cisplatin and PARP inhibitor veliparib sensitivities were determined by MTT assays, followed by apoptosis and cell cycle analyses. Results: An inverse correlation between miR-199a-3p and BRCA1 expressions was observed in TNBC tumor specimens. miR-199a-3p was demonstrated to directly target BRCA1, and caused downregulation of BRCA1 protein expression, and suppressed luciferase activity mediated by BRCA1-3’-UTR in reporter assays. Overexpression of miR-199a-3p in TNBC cell lines (MDA-MB-231 and MDA-MB-468) was shown to inhibit cell proliferation, migration, and clonogenic ability, suggesting tumor-suppressive functions. On the other hand, cisplatin treatment induced BRCA1 expression, concurrent with reduced miR-199a-3p, in TNBC cells. Restoration of miR-199a-3p expression sensitized the cells to cisplatin and PARP inhibitor veliparib. Ectopic expression of miR-199a-3p also suppressed aldehyde dehydrogenase (ALDH)-positive stem cell-like population in cisplatin-resistant TNBC cells. Conclusions: Our results suggest that miR-199a-3p is involved in TNBC progression and chemotherapeutic sensitivity, at least partially through regulation of BRCA1.
Citation Format: John C. Ho, Vivian Y. Shin, Jiawei Chen, Man T. Siu, Isabella Cheuk, Ava Kwong. miR-199a-3p induces BRCA1 dysfunction in triple-negative breast cancer [abstract]. In: Proceedings of the AACR-NCI-EORTC International Conference: Molecular Targets and Cancer Therapeutics; 2017 Oct 26-30; Philadelphia, PA. Philadelphia (PA): AACR; Mol Cancer Ther 2018;17(1 Suppl):Abstract nr A046.
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Affiliation(s)
- John C. Ho
- The University of Hong Kong, Hong Kong, Hong Kong
| | | | - Jiawei Chen
- The University of Hong Kong, Hong Kong, Hong Kong
| | - Man T. Siu
- The University of Hong Kong, Hong Kong, Hong Kong
| | | | - Ava Kwong
- The University of Hong Kong, Hong Kong, Hong Kong
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16
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Chen J, Shin VY, Siu MT, Ho JCW, Cheuk I, Kwong A. miR-199a-5p confers tumor-suppressive role in triple-negative breast cancer. BMC Cancer 2016; 16:887. [PMID: 27842518 PMCID: PMC5109692 DOI: 10.1186/s12885-016-2916-7] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 10/27/2016] [Indexed: 01/03/2023] Open
Abstract
Background Triple-negative breast cancer (TNBC) remains a poor prognostic factor for breast cancer since no effective targeted therapy is readily available. Our previous studies confirmed miR-199a-5p is a TNBC-specific circulating biomarker, however, its functional roles in breast cancer is largely unknown. Thus, we investigated the functional implication of miR-199a-5p in TNBC and its potential underlying mechanisms. Methods MTT assay was performed to investigate the cell proliferation after transient transfection of miR-199a-5p in MDA-MB-231 cell line, followed by cell cycle analysis. Transwell invasion assay and wound healing assay were used to study the invasion and migration ability respectively. To further investigate the stemness-related characteristics of miR-199a-5p in breast cancer cells, single-cell clonogenic assay and aldehyde dehydrogenase (ALDH) assay were performed. 32 normal and 100 breast cancer patients’ plasma were recruited to identify the potential circulating markers by qPCR. Results Cell proliferation assay revealed significant inhibition after miR-199a-5p ectopic expression (p < 0.0001), as a result of decreased S phase (p = 0.0284), increased G0/G1 phase (p = 0.0260) and apoptosis (p = 0.0374). Invasiveness (p = 0.0005) and wound healing ability were also decreased upon miR-199a-5p overexpression. It significantly altered EMT-related genes expression, namely CDH1, ZEB1 and TWIST. Single-cell clonogenic assay showed decreased colonies in miR-199a-5p (p = 0.0182). Significant downregulation (p = 0.0088) and inhibited activity (p = 0.0390) of ALDH was observed in miR-199a-5p. ALDH1A3, which is the dominant isoform of ALDH, is significantly upregulated in breast cancer plasma especially in TNBC (p = 0.0248). PIK3CD was identified as a potential downstream target of miR-199a-5p. Conclusions Taken together, we unraveled, for the first time, the tumor-suppressive role of miR-199a-5p in TNBC, which attributed to EMT and cancer stemness properties, providing a novel therapeutic options towards this aggressive disease.
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Affiliation(s)
- Jiawei Chen
- Breast Surgery Division, Department of Surgery, The University of Hong Kong, Hong Kong, SAR, China
| | - Vivian Y Shin
- Breast Surgery Division, Department of Surgery, The University of Hong Kong, Hong Kong, SAR, China
| | - Man T Siu
- Breast Surgery Division, Department of Surgery, The University of Hong Kong, Hong Kong, SAR, China
| | - John C W Ho
- Breast Surgery Division, Department of Surgery, The University of Hong Kong, Hong Kong, SAR, China
| | - Isabella Cheuk
- Breast Surgery Division, Department of Surgery, The University of Hong Kong, Hong Kong, SAR, China
| | - Ava Kwong
- Breast Surgery Division, Department of Surgery, The University of Hong Kong, Hong Kong, SAR, China. .,Hong Kong Hereditary Breast Cancer Family Registry, Queen Mary Hospital, Room K1401, Pokfulam Road, Pok Fu Lam, Hong Kong. .,Department of Surgery, Hong Kong Sanatorium and Hospital, Hong Kong, SAR, China.
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Kwong A, Shin VY, Au CH, Law FBF, Ho DN, Ip BK, Wong ATC, Lau SS, To RMY, Choy G, Ford JM, Ma ESK, Chan TL. Detection of Germline Mutation in Hereditary Breast and/or Ovarian Cancers by Next-Generation Sequencing on a Four-Gene Panel. J Mol Diagn 2016; 18:580-94. [PMID: 27157322 DOI: 10.1016/j.jmoldx.2016.03.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 03/01/2016] [Accepted: 03/21/2016] [Indexed: 10/21/2022] Open
Abstract
Mutation in BRCA1/BRCA2 genes accounts for 20% of familial breast cancers, 5% to 10% of which may be due to other less penetrant genes which are still incompletely studied. Herein, a four-gene panel was used to examine the prevalence of BRCA1, BRCA2, TP53, and PTEN in hereditary breast and ovarian cancers in Southern Chinese population. In this cohort, 948 high-risk breast and/or ovarian patients were recruited for genetic screening by next-generation sequencing (NGS). The performance of our NGS pipeline was evaluated with 80 Sanger-validated known mutations and eight negative cases. With appropriate bioinformatics analysis pipeline, the detection sensitivity of NGS is comparable with Sanger sequencing. The prevalence of BRCA1/BRCA2 germline mutations was 9.4% in our Chinese cohort, of which 48.8% of the mutations arose from hotspot mutations. With the use of a tailor-made algorithm, HomopolymerQZ, more mutations were detected compared with single mutation detection algorithm. The frequencies of PTEN and TP53 were 0.21% and 0.53%, respectively, in the Southern Chinese patients with breast and/or ovarian cancers. High-throughput NGS approach allows the incorporation of control cohort that provides an ethnicity-specific data for polymorphic variants. Our data suggest that hotspot mutations screening such as SNaPshot could be an effective preliminary screening alternative adopted in a standard clinical laboratory without NGS setup.
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Affiliation(s)
- Ava Kwong
- Department of Surgery, The University of Hong Kong, Hong Kong, People's Republic of China; Department of Surgery, Hong Kong Sanatorium & Hospital, Hong Kong, People's Republic of China; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong, People's Republic of China.
| | - Vivian Y Shin
- Department of Surgery, The University of Hong Kong, Hong Kong, People's Republic of China
| | - Chun H Au
- Department of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, People's Republic of China
| | - Fian B F Law
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong, People's Republic of China; Department of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, People's Republic of China
| | - Dona N Ho
- Department of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, People's Republic of China
| | - Bui K Ip
- Department of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, People's Republic of China
| | - Anthony T C Wong
- Department of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, People's Republic of China
| | - Silvia S Lau
- Department of Medical Physics and Research, Hong Kong Sanatorium & Hospital, Hong Kong, People's Republic of China
| | - Rene M Y To
- Department of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, People's Republic of China
| | - Gigi Choy
- Department of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, People's Republic of China
| | - James M Ford
- Department of Medicine (Oncology), Stanford University School of Medicine, Stanford, California
| | - Edmond S K Ma
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong, People's Republic of China; Department of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, People's Republic of China
| | - Tsun L Chan
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong, People's Republic of China; Department of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, People's Republic of China
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Affiliation(s)
- Vivian Y Shin
- Department of Surgery, The University of Hong Kong, Hong Kong, SAR
| | - Ava Kwong
- Department of Surgery, The University of Hong Kong, Hong Kong, SAR.,The Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong, SAR.,Department of Surgery, Hong Kong Sanatorium & Hospital, Hong Kong, SAR
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Tang W, Han M, Ruan B, Jin W, Lou J, Yuan X, Chen D, Chen Y, Shin VY, Jin H, Wang X. Overexpression of GOLPH3 is associated with poor survival in Non-small-cell lung cancer. Am J Transl Res 2016; 8:1756-1762. [PMID: 27186299 PMCID: PMC4859904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 02/04/2016] [Indexed: 06/05/2023]
Abstract
As a highly conserved protein of the Golgi apparatus, Golgi phosphoprotein 3 (GOLPH3) has been shown to be involved in tumorigenesis. This study aims to explore the expression and significance of GOLPH3 in non-small-cell lung cancer (NSCLC). We found that GOLPH3 expression was significantly elevated in NSCLC tissues when compared with adjacent lung tissues (p<0.01). Moreover, GOLPH3 expression was significantly associated with histological type (p<0.01), differentiation (p<0.01), and lymph node metastasis (p<0.05). Kaplan-Meier survival analysis showed that overall survival of patients with high expression of GOLPH3 was significantly shorter (n=100, p<0.05). In addition, GOLPH3 knock-down in two independent NSCLC cell lines inhibited cell viability through the induction of cell cycle arrest and apoptosis. In conclusion, GOLPH3 is closely related to the progression in NSCLC and could be served as a potential prognostic biomarker and therapeutic target for NSCLC.
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Affiliation(s)
- Wanfen Tang
- Department of Medical Oncology, Key Laboratory of Biotherapy in Zhejiang, Sir Runrun Shaw Hospital, Medical School of Zhejiang UniversityChina
- Department of Medical Oncology, Jinhua Guangfu HospitalJinhua, China
| | - Mengjiao Han
- Department of Medical Oncology, Key Laboratory of Biotherapy in Zhejiang, Sir Runrun Shaw Hospital, Medical School of Zhejiang UniversityChina
| | - Beihong Ruan
- Department of Medical Oncology, Key Laboratory of Biotherapy in Zhejiang, Sir Runrun Shaw Hospital, Medical School of Zhejiang UniversityChina
| | - Wei Jin
- Department of Medical Oncology, Key Laboratory of Biotherapy in Zhejiang, Sir Runrun Shaw Hospital, Medical School of Zhejiang UniversityChina
| | - Jun Lou
- Department of Medical Oncology, Jinhua Guangfu HospitalJinhua, China
| | - Xiamei Yuan
- Department of Medical Oncology, Jinhua Guangfu HospitalJinhua, China
| | - Dingwei Chen
- Department of General Surgery, Sir Runrun Shaw Hospital, Medical School of Zhejiang UniversityChina
| | - Yangchao Chen
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong KongChina
| | - Vivian Y Shin
- Department of Surgery, Faculty of Medicine, The University of Hong KongChina
| | - Hongchuan Jin
- Department of Medical Oncology, Key Laboratory of Biotherapy in Zhejiang, Sir Runrun Shaw Hospital, Medical School of Zhejiang UniversityChina
| | - Xian Wang
- Department of Medical Oncology, Key Laboratory of Biotherapy in Zhejiang, Sir Runrun Shaw Hospital, Medical School of Zhejiang UniversityChina
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Abstract
INTRODUCTION Genetic risk factors and family history play an important role in breast cancer development. This review aimed to summarise the current genetic testing approach to hereditary breast/ovarian cancer. METHODS A systematic literature review was performed by searching the PubMed database. Publications available online until January 2015 that addressed issues related to hereditary breast/ovarian cancer genetic counselling/testing were selected. The search terms used were "familial breast/ovarian cancer", "susceptibility genes", "genetic counselling", and "genetic testing". The data extracted for this review were analysed by the authors, with a focus on genetic testing for hereditary breast/ovarian cancer. RESULTS Although a greater proportion of inherited breast/ovarian cancers are due to the BRCA1 and BRCA2 mutations, a number of new genes have emerged as susceptibility candidates, including rare germline mutations in high penetrance genes, such as TP53 and PTEN, and more frequent mutations in moderate/low penetrance genes, such as PALB2, CHEK2 and ATM. Multi-gene testing, if used appropriately, is generally a more cost- and time-effective method than single-gene testing, and may increase the number of patients who can be offered personal surveillance, risk-reduction options, and testing of high-risk family members. CONCLUSIONS Recent advances in molecular genetics testing have identified a number of susceptibility genes related to hereditary breast and/or ovarian cancers other than BRCA1 and BRCA2. The introduction of multi-gene testing for hereditary cancer has revolutionised the clinical management of high-risk patients and their families. Individuals with hereditary breast/ovarian cancer will benefit from genetic counselling/testing.
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Affiliation(s)
- Ava Kwong
- Breast Surgery Division, The University of Hong Kong, Pokfulam, Hong Kong
| | - J W Chen
- Breast Surgery Division, The University of Hong Kong, Pokfulam, Hong Kong
| | - Vivian Y Shin
- Breast Surgery Division, The University of Hong Kong, Pokfulam, Hong Kong
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Kwong A, Siu MT, Cheuk I, Ho JC, Chen J, Shin VY. Abstract P1-05-04: A novel mechanism of epithelial-mesenchymal transition in breast cancer metastasis: Involvement of prostanoid receptor. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p1-05-04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Triple-negative breast cancer is associated with higher metastatic rate and poor prognosis than other subtypes of breast cancer due to lack of targeted therapy. Epithelial-mesenchymal transition (EMT) is linked with metastasis with phenotypic conversion of epithelial cells. However, the regulation of EMT in breast cancer metastasis remains largely unstudied. Recent attention has focused on targeting the downstream of COX-2 pathway, understanding the role of prostanoid receptors in breast cancer metastasis may help the development of effective therapeutic interventions for patients with metastasis.
Methods: A stable EP2-expression cell line (MB-231-EP2) was used to study tumorigenesis and distant metastasis in human breast cancer metastatic model. Localization of EP2 and EMT markers were examined by immunostaining and immunofluorescence. Profiles of drug transporters genes were compared between siEP2 and siControl cells. Functional role of EP2 on cell proliferation, invasion and apoptosis were assessed. Alteration of EMT markers were examined by real-time PCR and Western blot analysis.
Results: Expression of EP2 receptor were higher in human primary tumors than non-tumor tissues. EP2 receptor was predominantly expressed in metastatic tumors than primary tumors in human breast cancer metastatic mice model. The metastatic tumors showed a higher Ki67 (cell proliferation) and CD31 (angiogenesis) than primary tumors in the xenograft tissues. Larger tumors and poor survival were seen in MD-231-EP2 bearing mice when compared with control. Silencing of EP2 by siRNA markedly reduced cell proliferation and invasion, but increased apoptosis and expression of solute carrier family 19 member A3 (SLC19A3) gene. Interestingly, SLC19A3 had a lower expression in primary tumors and was inversely correlated with EP2 expression. Ectopic expression of SLC19A3 suppressed cell proliferation and invasion through the restoration of E-cadherin and other EMT markers (Twist, Zeb1 and Snai2). Immunofluorescence staining showed that the localization of Twist and E-cadherin were altered in siEP2 cells.
Conclusion: Our results showed that EP2 promoted EMT and breast cancer metastasis through the downregulation of SLC19A3 expression. Taken together, targeting EP2/SLC19A3 signaling pathway maybe a potential treatment for metastasis and adjuvant chemotherapy to reduce the metastatic risk.
Citation Format: Kwong A, Siu MT, Cheuk I, Ho JC, Chen J, Shin VY. A novel mechanism of epithelial-mesenchymal transition in breast cancer metastasis: Involvement of prostanoid receptor. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P1-05-04.
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Affiliation(s)
- A Kwong
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - MT Siu
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - I Cheuk
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - JC Ho
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - J Chen
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - VY Shin
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
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Kwong A, Shin VY, Au CH, Law FB, Ho DN, Ip BK, Wong AT, Lau SS, To RM, Choy G, Ford JM, Ma ES, Chan TL. Abstract P2-09-20: Evaluation on the mutation screening by next-generation sequencing in hereditary breast and ovarian cancer: Implementation of recurrent mutation panel. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p2-09-20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Hereditary disposition accounts for 10-15% in breast cancers and 20-25% in ovarian cancers, in which 5-10% of women have genomic alteration in breast cancer predisposition genes, BRCA1 and BRCA2, while the rest are likely due to less penetrant genes. In specific ethnicities such as Ashkenazi Jewish, three founder mutations have been identified which covers 95 % of all the BRCA mutations identified in this race. These genes are screened prior to the gold standard Sanger Sequencing in order to reduce cost. Sanger Sequencing, however, still has the limitation on the necessity of laborious processing and results interpretation. Moreover, it limits the number of genes that can be analyzed in one setting. With the use of next-generation sequencing (NGS), identification of hereditary breast and ovarian cancer (HBOC) syndrome associated genes, other than BRCA, can be sequenced at the same time but yet a faster turnover time. This allows more timely targeted risk-reducing strategies and interventions to be implemented for mutation positive carriers and their family members.
Methods: In this study cohort, 948 high-risk breast/ovarian patients who met the HBOC selection criteria were recruited for mutation screening by our NGS pipeline. With the inclusion of 90 Sanger-validated known mutation cases, the performance of the NGS pipeline were proven to be comparable to Sanger sequencing. PTEN and TP53, other than BRCA1 and BRCA2, a 4 gene sequencing panel were included in the mutation screening for high-risk patients.
Results: The prevalence of BRCA1/BRCA2 germline mutations was 7.28% in our Chinese cohort and 47.8% of the mutation were recurrent mutations. Based on this finding, we further adopted a new workflow by screening the recurrent mutations including founder mutations from Chinese cohort prior to NGS for those who tested negative. In a testing cohort of 343 cases, the recurrent mutation pick-up rate was 3.5%, this implicated a more cost-effective method for mutation screening in the clinical setting. Moreover, the frequencies of PTEN and TP53 were 0.21% and 0.53% respectively in our population with breast and ovarian cases.
Conclusion: Taken together, our data demonstrated a strategic upfront screening for recurrent mutations in Chinese population which is highly applicable in most of the diagnostic laboratories. Multi-gene sequencing using the NGS technology will be the upcoming strategies for mutation screening for HBOC patients.
Citation Format: Kwong A, Shin VY, Au CH, Law FB, Ho DN, Ip BK, Wong AT, Lau SS, To RM, Choy G, Ford JM, Ma ES, Chan TL. Evaluation on the mutation screening by next-generation sequencing in hereditary breast and ovarian cancer: Implementation of recurrent mutation panel. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P2-09-20.
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Affiliation(s)
- A Kwong
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - VY Shin
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - CH Au
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - FB Law
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - DN Ho
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - BK Ip
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - AT Wong
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - SS Lau
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - RM To
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - G Choy
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - JM Ford
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - ES Ma
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
| | - TL Chan
- The University of Hong Kong, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong; Stanford University School of Medicine
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Cheuk IW, Shin VY, Siu MT, Tsang JY, Ho JC, Chen J, Tse GM, Wang X, Kwong A. Association of EP2 receptor and SLC19A3 in regulating breast cancer metastasis. Am J Cancer Res 2015; 5:3389-3399. [PMID: 26807319 PMCID: PMC4697685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 09/16/2015] [Indexed: 06/05/2023] Open
Abstract
Breast cancer is the most common cancer in women worldwide. Triple-negative breast cancer patients have higher metastatic rate than patients with other breast cancer subtypes. Distant metastasis is one of the causes leading to the high mortality rates. Cyclooxygenase-2 (COX2) is associated with breast cancer metastasis and the downstream prostaglandin E2 (PGE2) exerted its effect through EP receptors (EP1-EP4). However, the exact molecular events of EP receptors in breast cancer metastasis remain undefined. Expressions of EP receptors were determined during cancer development in NOD-SCID mice inoculated with MB-231 and MB-231-EP2 clone. EP2 overexpressing stable clone was constructed to investigate the proliferation and invasion potentials in vivo and in vitro. Drug transporter array was used to identify EP2 receptor-associated drug transported genes in breast cancer metastasis. Localization of EP2 receptor in primary tissues and xenografts were examined by immunostaining. Stable EP2-expression cells formed larger tumors than parental cells in mice model and was highly expressed in both primary and metastatic tissues. Silencing of EP2 receptor by siRNA and antagonist (AH 6809) significantly decreased cell proliferation and invasion, concomitant with reduced MMP-2 and MMP-9 expressions. Results from array data showed that expression of SLC19A3 was markedly increased in EP2 siRNA transfected cells. Ectopic expression of SLC19A3 retarded cell proliferation, invasion and MMPs expressions. Notably, SLC19A3 had a lower expression in primary tissues and was negatively correlated with EP2 receptor expression. Our novel finding revealed that EP2 receptor regulated metastasis through downregulation of SLC19A3. Thus, targeting EP2-SLC19A3 signaling is a potential therapeutic therapy for treating metastatic breast cancer.
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Affiliation(s)
| | - Vivian Y Shin
- Department of Surgery, The University of Hong KongHong Kong
| | - Man T Siu
- Department of Surgery, The University of Hong KongHong Kong
| | - Julia Y Tsang
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong KongHong Kong
| | - John C Ho
- Department of Surgery, The University of Hong KongHong Kong
| | - Jiawei Chen
- Department of Surgery, The University of Hong KongHong Kong
| | - Gary M Tse
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong KongHong Kong
| | - Xian Wang
- Department of Medical Oncology, Biomedical Research Center, Sir Runrun Shaw Hospital, School of Medicine, Zhejiang UniversityChina
| | - Ava Kwong
- Department of Surgery, The University of Hong KongHong Kong
- Department of Surgery, The Hong Kong Sanatorium and HospitalHong Kong
- The Hong Kong Hereditary Breast Cancer Family RegistryHong Kong
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Kwong A, Shin VY, Ho JCW, Kang E, Nakamura S, Teo SH, Lee ASG, Sng JH, Ginsburg OM, Kurian AW, Weitzel JN, Siu MT, Law FBF, Chan TL, Narod SA, Ford JM, Ma ESK, Kim SW. Comprehensive spectrum of BRCA1 and BRCA2 deleterious mutations in breast cancer in Asian countries. J Med Genet 2015; 53:15-23. [PMID: 26187060 DOI: 10.1136/jmedgenet-2015-103132] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 07/02/2015] [Indexed: 12/20/2022]
Abstract
Approximately 5%-10% of breast cancers are due to genetic predisposition caused by germline mutations; the most commonly tested genes are BRCA1 and BRCA2 mutations. Some mutations are unique to one family and others are recurrent; the spectrum of BRCA1/BRCA2 mutations varies depending on the geographical origins, populations or ethnic groups. In this review, we compiled data from 11 participating Asian countries (Bangladesh, Mainland China, Hong Kong SAR, Indonesia, Japan, Korea, Malaysia, Philippines, Singapore, Thailand and Vietnam), and from ethnic Asians residing in Canada and the USA. We have additionally conducted a literature review to include other Asian countries mainly in Central and Western Asia. We present the current pathogenic mutation spectrum of BRCA1/BRCA2 genes in patients with breast cancer in various Asian populations. Understanding BRCA1/BRCA2 mutations in Asians will help provide better risk assessment and clinical management of breast cancer.
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Affiliation(s)
- Ava Kwong
- Department of Surgery, The University of Hong Kong, Hong Kong, Hong Kong Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong, Hong Kong Departments of Medicine (Oncology) and Genetics, Stanford University School of Medicine, Stanford, California, USA Department of Surgery, Hong Kong Sanatorium & Hospital, Hong Kong, Hong Kong
| | - Vivian Y Shin
- Department of Surgery, The University of Hong Kong, Hong Kong, Hong Kong
| | - John C W Ho
- Department of Surgery, The University of Hong Kong, Hong Kong, Hong Kong Department of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, Hong Kong
| | - Eunyoung Kang
- Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Seigo Nakamura
- Department of Surgery, Division of Breast Surgical Oncology, Showa University School of Medicine, Tokyo, Japan
| | - Soo-Hwang Teo
- Cancer Research Initiatives Foundation, Sime Darby Medical Centre, Subang Jaya, Selangor, Malaysia Faculty of Medicine, University Malaya Cancer Research Institute, University Malaya, Subang Jaya, Malaysia
| | - Ann S G Lee
- Division of Medical Sciences, National Cancer Centre, Singapore, Singapore Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore Office of Clinical & Academic Faculty Affairs, Duke-NUS Graduate Medical School, Singapore, Singapore
| | - Jen-Hwei Sng
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Ophira M Ginsburg
- Women's College Research Institute, University of Toronto, Toronto, Ontario, Canada
| | - Allison W Kurian
- Departments of Medicine (Oncology) and Genetics, Stanford University School of Medicine, Stanford, California, USA
| | - Jeffrey N Weitzel
- Division of Clinical Cancer Genetics, City of Hope National Medical Center, Duarte, California, USA
| | - Man-Ting Siu
- Department of Surgery, The University of Hong Kong, Hong Kong, Hong Kong
| | - Fian B F Law
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong, Hong Kong Department of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, Hong Kong
| | - Tsun-Leung Chan
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong, Hong Kong Department of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, Hong Kong
| | - Steven A Narod
- Women's College Research Institute, University of Toronto, Toronto, Ontario, Canada
| | - James M Ford
- Departments of Medicine (Oncology) and Genetics, Stanford University School of Medicine, Stanford, California, USA
| | - Edmond S K Ma
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong, Hong Kong Department of Molecular Pathology, Hong Kong Sanatorium & Hospital, Hong Kong, Hong Kong
| | - Sung-Won Kim
- Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
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Kwong A, Chen J, Shin VY, Ho JCW, Law FBF, Au CH, Chan TL, Ma ESK, Ford JM. The importance of analysis of long-range rearrangement of BRCA1 and BRCA2 in genetic diagnosis of familial breast cancer. Cancer Genet 2015; 208:448-54. [PMID: 26271414 DOI: 10.1016/j.cancergen.2015.05.031] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 05/11/2015] [Accepted: 05/12/2015] [Indexed: 12/30/2022]
Abstract
Germline BRCA gene mutations are reportedly associated with hereditary breast and ovarian cancers. Identification of BRCA mutations greatly improves the preventive strategies and management of breast cancer. Sanger sequencing has been the gold standard in identifying these mutations. However, 4-28% of inherited BRCA mutations may be due to large genomic rearrangements (LGRs), which could be missed by using Sanger sequencing alone. Our aim is to evaluate the pick-up rate of LGRs in our cohort. A total of 1,236 clinically high-risk patients with breast and/or ovarian cancers were recruited through The Hong Kong Hereditary Breast Cancer Family Registry from 2007 to 2014. Full gene sequencing (either Sanger or next generation sequencing) and multiplex ligation-dependent probe amplification (MLPA) were performed. We identified 120 deleterious BRCA mutations: 57 (4.61%) were in BRCA1 and 63 (5.10%) were in BRCA2. LGRs accounted for 6.67% (8 of 120) of all BRCA mutations, whereas 8.77 % (5 of 57) were BRCA1 mutations and 4.76% (3 of 63) were BRCA2 mutations. Through this integrated approach, both small nucleotide variations and LGRs could be detected. We suggest that MLPA should be incorporated into the standard practice for genetic testing to avoid false-negative results, which would greatly affect the management of these high-risk families.
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Affiliation(s)
- Ava Kwong
- Department of Surgery, The University of Hong Kong, Hong Kong SAR, China; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong Sanatorium and Hospital, Hong Kong SAR, China; Department of Oncology, Stanford University School of Medicine, Stanford, California, USA; Department of Surgery, Hong Kong Sanatorium and Hospital, Hong Kong SAR, China.
| | - Jiawei Chen
- Department of Surgery, The University of Hong Kong, Hong Kong SAR, China
| | - Vivian Y Shin
- Department of Surgery, The University of Hong Kong, Hong Kong SAR, China
| | - John C W Ho
- Department of Surgery, The University of Hong Kong, Hong Kong SAR, China; Department of Molecular Pathology, Hong Kong Sanatorium and Hospital, Hong Kong SAR, China
| | - Fian B F Law
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong Sanatorium and Hospital, Hong Kong SAR, China; Department of Molecular Pathology, Hong Kong Sanatorium and Hospital, Hong Kong SAR, China
| | - Chun Hang Au
- Department of Molecular Pathology, Hong Kong Sanatorium and Hospital, Hong Kong SAR, China
| | - Tsun-Leung Chan
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong Sanatorium and Hospital, Hong Kong SAR, China; Department of Molecular Pathology, Hong Kong Sanatorium and Hospital, Hong Kong SAR, China
| | - Edmond S K Ma
- Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong Sanatorium and Hospital, Hong Kong SAR, China; Department of Molecular Pathology, Hong Kong Sanatorium and Hospital, Hong Kong SAR, China
| | - James M Ford
- Department of Oncology, Stanford University School of Medicine, Stanford, California, USA
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Shin VY, Siu MT, Ho JC, Cheuk I, Chen J, Kwong A. Abstract P2-07-07: Prostaglandin E receptor 2 (EP2) regulates breast cancer stem-cell like property and promotes epithelial-mesenchymal transition. Cancer Res 2015. [DOI: 10.1158/1538-7445.sabcs14-p2-07-07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Presence of cancer stem-like cells (CSCs) is the main obstacle for poor treatment response and mortality in breast cancer patients. Prostaglandin E receptors have been reported to play a role in epithelial-mesenchymal transition (EMT) and metastasis, however, the contribution on cancer stem cell compartment remains unstudied.
Methods: Human xenograft breast cancer model was used to study the expression of EP receptors during cancer development. Construction of stable EP2-expression cells was used to study tumorigenesis and characterization of EP2 receptor. Functional role of EP2 receptor on cell proliferation, flow cyometry, invasion and EMT gene expression array were performed in transfected cells. Expression of EP2 receptor was compared in primary tumor tissues by immunostaining and real-time PCR.
Results: EP2 receptor was predominantly expressed in animal tissues during cancer development, as well as in human primary tumor tissues. In mouse xenograft model, MB-231-EP2 clone developed a more aggressive tumor with a larger tumor size and showed a significant increase in cancer stem cell marker aldehyde hydrogenase (ALDH1) expression. In vitro study, MB-231-EP2 clone increased colony formation capacity and S-phase entry by the regulation of E-cadherin, TWIST1 and ALDH1. Importantly, we found that Twist1 expression level was higher in breast cancer patients than healthy controls and was associated with ALDH1 expression.
Conclusions: These findings implicated that EP2 receptor was crucial to nurture CSC phenotype and promote tumorigenesis in breast cancer. Blocking of EP2 might be a potential therapeutic strategy to improve treatment response for breast cancer patients.
Citation Format: Vivian Y Shin, Man T Siu, John C Ho, Isabella Cheuk, Jiawei Chen, Ava Kwong. Prostaglandin E receptor 2 (EP2) regulates breast cancer stem-cell like property and promotes epithelial-mesenchymal transition [abstract]. In: Proceedings of the Thirty-Seventh Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2014 Dec 9-13; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2015;75(9 Suppl):Abstract nr P2-07-07.
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Affiliation(s)
| | | | | | | | | | - Ava Kwong
- 1University of Hong Kong
- 2Hong Kong Hereditary Breast Cancer Family Registry
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Shin VY, Siu JM, Cheuk I, Ng EKO, Kwong A. Circulating cell-free miRNAs as biomarker for triple-negative breast cancer. Br J Cancer 2015; 112:1751-9. [PMID: 25906045 PMCID: PMC4647231 DOI: 10.1038/bjc.2015.143] [Citation(s) in RCA: 109] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Revised: 03/10/2015] [Accepted: 03/16/2015] [Indexed: 02/06/2023] Open
Abstract
Background: Triple-negative breast cancer (TNBC) accounts for 15–20% of all breast cancer in women globally. This subtype often has early and high recurrence rates resulting in poor survival, partially due to lack of targeted therapies. Therefore, there is an urgent need to identify TNBC-specific biomarkers for early diagnosis and treatment monitoring, and to develop more effective targeted therapy. Methods: By using miRCURY LNA array platform, we compared the differential miRNA expressions in plasma of patient with TNBC (n=5) and non-TNBC (n=5), as well as healthy controls (n=5). Potential miRNAs were then validated in a large cohort of patients by real-time PCR. Results: Ten putative miRNAs from the microarray data that differentially expressed between non-TNBC and healthy controls were identified. In the screening phase (n=90), we selected five miRNAs (miR-92a-3p, miR-342-3p, miR-16, miR-21 and miR-199a-5p) that could discriminate TNBC from non-TNBC for further validation. Results showed that miR-16, miR-21 and miR-199a-5p were underexpressed in TNBC when compared with non-TNBC, and were further validated in a large cohort (n=252). In addition, post-operative plasma levels of miR-16, miR-21 and miR-199a-5p were significantly restored when compared with pre-operative plasma of TNBC. Plasma miR-199a-5p expression in TNBC had significant difference when compared with non-TNBC and healthy controls, the receiver-operator characteristics curve analysis revealed the highest area under curve (AUC=0.8838) among all. The expression levels were associated with TNM stage and tumour subtypes. Conclusions: Our data suggest that miR-199a-5p could be a TNBC-specific marker with diagnostic value and provide insights into targeted therapy in the treatment of TNBC.
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Affiliation(s)
- V Y Shin
- Department of Surgery, the University of Hong Kong, Hong Kong SAR, China
| | - J M Siu
- Department of Surgery, the University of Hong Kong, Hong Kong SAR, China
| | - I Cheuk
- Department of Surgery, the University of Hong Kong, Hong Kong SAR, China
| | - E K O Ng
- Department of Surgery, the University of Hong Kong, Hong Kong SAR, China
| | - A Kwong
- 1] Department of Surgery, the University of Hong Kong, Hong Kong SAR, China [2] The Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong SAR, China
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Tsang JYS, Ni YB, Ng EK, Shin VY, Mak KF, Go EML, Tawasil J, Chan SK, Ko CW, Kwong A, Tse GM. MicroRNAs are differentially deregulated in mammary malignant phyllodes tumour. Histopathology 2015; 67:294-305. [PMID: 25585495 DOI: 10.1111/his.12648] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 01/11/2015] [Indexed: 01/28/2023]
Abstract
AIMS MicroRNAs (miRs) have been shown to play important roles in tumour progression. Their expression pattern can be useful for cancer classification. However, little is known about miRs in mammary phyllodes tumours (PT). METHODS AND RESULTS In this study, polymerase chain reaction (PCR)-based miR profiling was performed in a small PT cohort to identify deregulated miRs in malignant PT. The purported roles and targets of these miRs were further validated. Unsupervised clustering of miR expression profiling segregated PT into different grades, implicating the miR profile in PT classification. Among the deregulated miRs, miR-21, miR-335 and miR-155 were validated to be higher in malignant than in lower-grade PT in the independent cohort by quantitative PCR (qPCR) (P ≤ 0.032). Their expression correlated with some of the malignant histological features, including high stromal cellularity, nuclear pleomorphism and mitosis. Subsequent analysis of their downstream proteins, namely PTEN for miR-21/miR-155 and Rb for miR-335, also showed an independent significant negative association between miR and protein expression. CONCLUSIONS Differential expression of miRs in PT could be useful in diagnosis and grading of PT. Their deregulated expression, together with the altered downstream targets, implicated their active involvement in PT malignant transformation.
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Affiliation(s)
- Julia Y S Tsang
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong
| | - Yun-Bi Ni
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong
| | - Enders Ko Ng
- Department of Biomedical Sciences, City University of Hong Kong, Hong Kong
| | - Vivian Y Shin
- Department of Surgery, The University of Hong Kong, Hong Kong
| | - Ko-Fung Mak
- Department of Pathology, Alice Ho Miu Ling Nethersole Hospital, Hong Kong
| | - Edna May L Go
- Department of Pathology, University of the Philippines, Manila, Philippines
| | - John Tawasil
- Department of Pathology, University of the Philippines, Manila, Philippines
| | - Siu-Ki Chan
- Departments of Pathology, Kwong Wah Hospital, Hong Kong
| | - Chun-Wai Ko
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong
| | - Ava Kwong
- Department of Surgery, The University of Hong Kong, Hong Kong
| | - Gary M Tse
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong
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Ma Y, Yue Y, Pan M, Sun J, Chu J, Lin X, Xu W, Feng L, Chen Y, Chen D, Shin VY, Wang X, Jin H. Histone deacetylase 3 inhibits new tumor suppressor gene DTWD1 in gastric cancer. Am J Cancer Res 2015; 5:663-673. [PMID: 25973305 PMCID: PMC4396045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 02/15/2015] [Indexed: 06/04/2023] Open
Abstract
Cancer epigenetics plays an important role in the pathogenesis of many cancers including gastric cancer. Histone deacetylases (HDACs) emerge as exciting therapeutic targets for cancer treatment and prevention. In this study, we identified DTWD1 as one of the 122 genes upregulated after treatment of trichostatin A (TSA) in two gastric cancer cell lines. Moreover, DTWD1 was downregulated in gastric cancer cell lines and primary gastric carcinoma tissues. It was further identified as the new target of p53. Then we revealed that HDAC3 downregulated DTWD1 by disrupting the interaction of p53 with DTWD1 promoter. Furthermore, DTWD1 functioned as a tumor suppressor by downregulating cyclin B1 expression to inhibit proliferation. In summary, as the new p53 target gene, DTWD1 was downregulated in gastric cancer by HDAC3 and acted as a novel tumor suppressor gene. Specific inhibitors of HDAC3 might be a new approach for gastric cancer treatment by activating DTWD1 expression.
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Affiliation(s)
- Yanning Ma
- Laboratory of Cancer Biology, Department of Medical Oncology, Key laboratory of Biotherapy in Zhejiang Province, Sir Runrun Shaw HospitalZhejiang University, China
| | - Yongfang Yue
- Laboratory of Cancer Biology, Department of Medical Oncology, Key laboratory of Biotherapy in Zhejiang Province, Sir Runrun Shaw HospitalZhejiang University, China
| | - Min Pan
- Laboratory of Cancer Biology, Department of Medical Oncology, Key laboratory of Biotherapy in Zhejiang Province, Sir Runrun Shaw HospitalZhejiang University, China
| | - Jie Sun
- Laboratory of Cancer Biology, Department of Medical Oncology, Key laboratory of Biotherapy in Zhejiang Province, Sir Runrun Shaw HospitalZhejiang University, China
| | - Jue Chu
- Laboratory of Cancer Biology, Department of Medical Oncology, Key laboratory of Biotherapy in Zhejiang Province, Sir Runrun Shaw HospitalZhejiang University, China
| | - Xiaoying Lin
- Laboratory of Cancer Biology, Department of Medical Oncology, Key laboratory of Biotherapy in Zhejiang Province, Sir Runrun Shaw HospitalZhejiang University, China
| | - Wenxia Xu
- Laboratory of Cancer Biology, Department of Medical Oncology, Key laboratory of Biotherapy in Zhejiang Province, Sir Runrun Shaw HospitalZhejiang University, China
| | - Lifeng Feng
- Laboratory of Cancer Biology, Department of Medical Oncology, Key laboratory of Biotherapy in Zhejiang Province, Sir Runrun Shaw HospitalZhejiang University, China
| | - Yan Chen
- Departrment of Gastroenterology, The 2nd Hospital of Zhejiang UniversityChina
| | - Dingwei Chen
- Laboratory of Cancer Biology, Department of Medical Oncology, Key laboratory of Biotherapy in Zhejiang Province, Sir Runrun Shaw HospitalZhejiang University, China
| | - Vivian Y Shin
- Departrment of Surgery, The University of Hong KongChina
| | - Xian Wang
- Laboratory of Cancer Biology, Department of Medical Oncology, Key laboratory of Biotherapy in Zhejiang Province, Sir Runrun Shaw HospitalZhejiang University, China
| | - Hongchuan Jin
- Laboratory of Cancer Biology, Department of Medical Oncology, Key laboratory of Biotherapy in Zhejiang Province, Sir Runrun Shaw HospitalZhejiang University, China
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Shen J, Xiao Z, Wu WKK, Wang MH, To KF, Chen Y, Yang W, Li MSM, Shin VY, Tong JH, Kang W, Zhang L, Li M, Wang L, Lu L, Chan RLY, Wong SH, Yu J, Chan MTV, Chan FKL, Sung JJY, Cheng ASL, Cho CH. Epigenetic silencing of miR-490-3p reactivates the chromatin remodeler SMARCD1 to promote Helicobacter pylori-induced gastric carcinogenesis. Cancer Res 2014; 75:754-65. [PMID: 25503559 DOI: 10.1158/0008-5472.can-14-1301] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Chromatin remodeling has emerged as a hallmark of gastric cancer, but the regulation of chromatin regulators other than genetic change is unknown. Helicobacter pylori causes epigenetic dysregulation to promote gastric carcinogenesis, but the roles and functions of microRNAs (miRNA) in this multistage cascade are not fully explored. In this study, miRNA expression in preneoplastic and neoplastic lesions in murine stomachs induced by H. pylori and N-methyl-N-nitrosourea (MNU) was profiled by miRNA expression array. miR-490-3p exhibited progressive downregulation in gastritis, intestinal metaplasia, and adenocarcinoma during H. pylori and MNU-induced gastric carcinogenesis. Significant downregulation of miR-490-3p was confirmed in human gastric cancer tissues in which its regulatory region was found to be hypermethylated. miR-490-3p exerted growth- and metastasis-suppressive effects on gastric cancer cells through directly targeting SMARCD1, a SWItch/Sucrose NonFermentable (SWI/SNF) chromatin remodeling complex subunit. Knockdown of SMARCD1 significantly attenuated the protumorigenic effects of miR-490-3p inhibitor, whereas enforced expression of SMARCD1 promoted in vitro and in vivo oncogenic phenotypes of gastric cancer cells. SMARCD1 was markedly upregulated in gastric cancer in which its high expression was associated with shortened patients' survival independent of TNM staging. In conclusion, hypermethylation-mediated silencing of miR-490-3p reactivates SMARCD1 to confer malignant phenotypes, mechanistically linking H. pylori, chromatin remodeling, and gastric carcinogenesis.
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Affiliation(s)
- Jing Shen
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong. Institute of Digestive Disease and State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong
| | - Zhangang Xiao
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong
| | - William K K Wu
- Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong. Institute of Digestive Disease and State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong. CUHK Shenzhen Research Institute, Shenzhen, China.
| | - Maggie H Wang
- The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong
| | - Ka F To
- Institute of Digestive Disease and State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong. Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong
| | - Yangchao Chen
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong. Institute of Digestive Disease and State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong
| | - Weiqin Yang
- Institute of Digestive Disease and State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong. Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong
| | - May S M Li
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong
| | - Vivian Y Shin
- Institute of Digestive Disease and State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong
| | - Joanna H Tong
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong
| | - Wei Kang
- Department of Anatomical and Cellular Pathology, The Chinese University of Hong Kong, Hong Kong
| | - Lin Zhang
- Institute of Digestive Disease and State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong. Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong
| | - Minxing Li
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong
| | - Lin Wang
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong
| | - Lan Lu
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong
| | - Ruby L Y Chan
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong
| | - Sunny H Wong
- Institute of Digestive Disease and State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong. Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong
| | - Jun Yu
- Institute of Digestive Disease and State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong. Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong. CUHK Shenzhen Research Institute, Shenzhen, China
| | - Matthew T V Chan
- Department of Anaesthesia and Intensive Care, The Chinese University of Hong Kong, Hong Kong
| | - Francis K L Chan
- Institute of Digestive Disease and State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong. Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong
| | - Joseph J Y Sung
- Institute of Digestive Disease and State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong. Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong
| | - Alfred S L Cheng
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong. Institute of Digestive Disease and State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong.
| | - Chi H Cho
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong. Institute of Digestive Disease and State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong
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Ng EK, Shin VY, Leung CP, Chan VW, Law FB, Siu MT, Lang BH, Ma ES, Kwong A. Elevation of methylated DNA in KILLIN/PTEN in the plasma of patients with thyroid and/or breast cancer. Onco Targets Ther 2014; 7:2085-92. [PMID: 25419146 PMCID: PMC4234161 DOI: 10.2147/ott.s53597] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Around 80% of mutations in the PTEN gene have been reported to be associated with diseases such as Cowden syndrome, which is an autosomal dominant disorder associated with an increased risk of developing breast, thyroid, and endometrial neoplasms. Recent studies have also demonstrated that KILLIN, which is located proximally to PTEN, shares the same transcription start site, and is assumed to be regulated by the same promoter, but is transcribed in the opposite direction. In this regard, we postulate that there may be a connection between KILLIN/PTEN genes and breast and thyroid cancers. Using real-time quantitative polymerase chain reaction (qPCR), we found that expression of KILLIN, but not PTEN, was significantly decreased in 23 Chinese women with a personal history of breast and thyroid cancer or a personal history of breast cancer and a family history of thyroid cancer, or vice versa, and at least two persons in the family with thyroid cancer or at a young age <40 years, when compared with healthy controls (P<0.0001). No PTEN mutations were found in these 23 patients. We then developed a simple methylation-sensitive restriction enzyme digestion followed by real-time quantitative assay to quantify plasma methylated KILLIN/PTEN DNA in these patients. Plasma levels of methylated KILLIN/PTEN DNA were significantly increased in these patients when compared with healthy controls (P<0.05). This study shows that plasma methylated KILLIN/PTEN DNA was significantly elevated, suggesting hypermethylation of the KILLIN/PTEN promoter in breast and thyroid cancer patients.
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Affiliation(s)
- Enders K Ng
- Department of Surgery, The University of Hong Kong, Hong Kong
| | - Vivian Y Shin
- Department of Surgery, The University of Hong Kong, Hong Kong
| | - Candy P Leung
- Department of Surgery, The University of Hong Kong, Hong Kong
| | - Vivian W Chan
- Department of Molecular Pathology and Department of Surgery, Hong Kong Sanatorium and Hospital, Hong Kong
| | - Fian B Law
- Department of Molecular Pathology and Department of Surgery, Hong Kong Sanatorium and Hospital, Hong Kong ; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong
| | - Man T Siu
- Department of Surgery, The University of Hong Kong, Hong Kong
| | - Brian H Lang
- Department of Surgery, The University of Hong Kong, Hong Kong
| | - Edmond S Ma
- Department of Molecular Pathology and Department of Surgery, Hong Kong Sanatorium and Hospital, Hong Kong ; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong
| | - Ava Kwong
- Department of Surgery, The University of Hong Kong, Hong Kong ; Hong Kong Hereditary Breast Cancer Family Registry, Hong Kong
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Shin VY, Siu MT, Ho JC, Kwong A. Abstract 531: MiR-199a-5p is a biomarker for and regulator of epithelial-mesenchymal transition in triple-negative breast cancer patients. Cancer Res 2014. [DOI: 10.1158/1538-7445.am2014-531] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Objectives: Triple-negative breast cancer (TNBC) accounts for 15-20% of all breast cancer, and is characterized by the absence of estrogen receptor, progesterone receptor and human epidermal growth factor receptor. The lack of targeted therapy is a major obstacle for treating against this aggressive subtype, hence the search of specific biomarkers may use as potential diagnostic marker and perhaps a therapeutic target for TNBC. Methods: Plasma samples from patients with TNBC and non-TNBC were recruited for miRNA profiling. By using miRCURY LNA array containing 730 miRNAs, we compared the differential miRNA expressions in plasma of patient with TNBC (n=5) and non-TNBC (n=5), as well as healthy controls (n=5). Selected miRNAs were further validated in an independent cohort (n=250) using real-time RT-PCR. Functional study of miRNA was also carried out in the cell lines. Results: Microarray data revealed miR-16, miR-21 and miR-199a-5p have differentially expression between TNBC and non-TNBC. We found that miR-16, miR-21 and miR-199a-5p were underexpressed in TNBC cases when compared with healthy controls. Moreover, post-operative expression levels of miR-16, miR-21 and miR-199a-5p were significantly increased than that of pre-operative plasma of TNBC. We then stratified the patients by TNM stage and associate with miRNA expression level. Plasma miR-199a-5p expression in TNBC patients had significant difference when compared with healthy controls (stage I, p<0.002; stage II, p<0.001; stage III, p<0.011). Transfection of miR-199a-5p mimic significantly reduced cell proliferation and restored the epithelial-mesenchymal transition (EMT) markers (E-cadherin, ZEB1 and TWIST2). Conclusions: Our data implicate that miR-199a-5p is a potential marker for discriminating TNBC cases and non-TNBC cases. The association of miR-199a-5p with EMT markers uncovers an important pathway in metastatic breast cancer. This study provides insights for the potential use of miRNA as diagnostic marker and targeted therapy for the treatment of TNBC.
Citation Format: Vivian Y. Shin, Man T. Siu, John C. Ho, Ava Kwong. MiR-199a-5p is a biomarker for and regulator of epithelial-mesenchymal transition in triple-negative breast cancer patients. [abstract]. In: Proceedings of the 105th Annual Meeting of the American Association for Cancer Research; 2014 Apr 5-9; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2014;74(19 Suppl):Abstract nr 531. doi:10.1158/1538-7445.AM2014-531
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Affiliation(s)
| | - Man T. Siu
- The University of Hong Kong, Pokfulam, Hong Kong
| | - John C. Ho
- The University of Hong Kong, Pokfulam, Hong Kong
| | - Ava Kwong
- The University of Hong Kong, Pokfulam, Hong Kong
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Lu L, Chan RLY, Luo XM, Wu WKK, Shin VY, Cho CH. Animal models of gastrointestinal inflammation and cancer. Life Sci 2014; 108:1-6. [PMID: 24825611 DOI: 10.1016/j.lfs.2014.04.036] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Revised: 04/20/2014] [Accepted: 04/29/2014] [Indexed: 02/06/2023]
Abstract
Inflammation and cancer are the two major disorders in the gastrointestinal tract. They are causally related in their pathogenesis. It is important to study animal models' causal relationship and, in particular, to discover new therapeutic agents for such diseases. There are several criteria for these models in order to make them useful in better understanding the etiology and treatment of the said diseases in humans. In this regard, animal models should be similar as possible to human diseases and also be easy to produce and reproducible and also economic to allow a continuous replication in different laboratories. In this review, we summarize the various animal models for inflammatory and cancerous disorders in the upper and lower gastrointestinal tract. Experimental approaches are as simple as by giving a single oral dose of alcohol or other noxious agents or by injections of multiple dosages of ulcer inducing agents or by parenteral administration or in drinking water of carcinogens or by modifying the genetic makeups of animals to produce relatively long-term pathological changes in particular organs. With these methods they could induce consistent inflammatory responses or tumorigenesis in the gastrointestinal mucosa. These animal models are widely used in laboratories in understanding the pathogenesis as well as the mechanisms of action for therapeutic agents in the treatment of gastrointestinal inflammation and cancer.
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Affiliation(s)
- L Lu
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Ruby L Y Chan
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - X M Luo
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - William K K Wu
- Institute of Digestive Disease, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Vivian Y Shin
- Department of Surgery, Faculty of Medicine, The University of Hong Kong, Hong Kong, China
| | - C H Cho
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China.
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Kwong A, Au CH, Law FB, Ho DN, Ip BK, Wong AT, Shin VY, Chan TL, Ma ES. Abstract P2-07-03: High-throughput germline mutation screening for hereditary breast cancer in southern Chinese patients by massively parallel DNA sequencing. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p2-07-03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Introduction: Breast cancer is the most common malignancy and 3rd leading cause of deaths among the female population in Hong Kong. Since the establishment of The Hong Kong Hereditary Breast Cancer Family Registry in 2007, 1344 patients with breast and/or ovarian cancer who met the selection criteria were recruited for genetic testing in Hong Kong. Since 2011 we started to employ next-generation DNA sequencing (NGS) to expedite the analysis workflow and expand the panel of genes for sequencing.
Aim: To evaluate the workflow of NGS in mutation screening of BRCA1, BRCA2, TP53 and PTEN genes, and compared with the sequence data obtained by Sanger sequencing.
Methods: We sequenced BRCA1, BRCA2, TP53 and PTEN genes in peripheral blood samples of 410 patients, 53 positive controls and 107 healthy local individuals using 454 GS Junior System. Generation of barcoded amplicon libraries was streamlined by microfluidic PCR using Fluidigm Access Array System. Sequencing data were analyzed by an in-house developed fully automatic bioinformatics pipeline, which mainly consists of GS Amplicon Variant Analyzer, SAMtools and Ensembl Variant Effect Predictor. All putative mutations identified were validated by Sanger sequencing. Furthermore, the frequency of BRCA1, BRCA2 and PTEN missense variants of unknown significance (VUS) identified in the cohort were compared among 107 healthy local individuals and 1000 Genomes project samples. The VUS were also subjected to a panel of in silico prediction methods including PolyPhen and SIFT.
Results: Among 410 patients, there were 7 in BRCA1, 6 in BRCA2 and 1 in TP53 mutations found, including 1 novel recurrent BRCA2 (c.7007G>T) and 1 novel founder BRCA2 (c.5164_5165delAG) mutations. Based on multiple criteria, 12 in BRCA1, 12 in BRCA2 and 1 in PTEN VUS could be prioritized for further investigation. The bioinformatics pipeline was extensively evaluated with Sanger-validated controls. The evaluation determined minimum sequencing coverage needed in this sequencing platform for accurate analysis. The pipeline accuracy was demonstrated by successful detecting mutations from 53 positive controls, including single nucleotide variants, insertions and deletions in different sequence context.
Conclusion: BRCA1, BRCA2, TP53 and PTEN mutation screening of 410 patients were expedited by high-throughput DNA sequencing. This method could detect 14 positive cases, including recurrent mutations, in a shorter period of time when compared with Sanger full gene sequencing. High-risk patients who are negative for the gene panel may need further investigation other than screening for BRCA1/2. The in-house developed bioinformatics pipeline was validated to detect various types of mutations and potentially become a conventional platform for genetic screening.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P2-07-03.
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Affiliation(s)
- A Kwong
- The University of Hong Kong; Hong Kong Sanatorium & Hospital; Hong Kong Hereditary Breast Cancer Family Registry
| | - CH Au
- The University of Hong Kong; Hong Kong Sanatorium & Hospital; Hong Kong Hereditary Breast Cancer Family Registry
| | - FB Law
- The University of Hong Kong; Hong Kong Sanatorium & Hospital; Hong Kong Hereditary Breast Cancer Family Registry
| | - DN Ho
- The University of Hong Kong; Hong Kong Sanatorium & Hospital; Hong Kong Hereditary Breast Cancer Family Registry
| | - BK Ip
- The University of Hong Kong; Hong Kong Sanatorium & Hospital; Hong Kong Hereditary Breast Cancer Family Registry
| | - AT Wong
- The University of Hong Kong; Hong Kong Sanatorium & Hospital; Hong Kong Hereditary Breast Cancer Family Registry
| | - VY Shin
- The University of Hong Kong; Hong Kong Sanatorium & Hospital; Hong Kong Hereditary Breast Cancer Family Registry
| | - TL Chan
- The University of Hong Kong; Hong Kong Sanatorium & Hospital; Hong Kong Hereditary Breast Cancer Family Registry
| | - ES Ma
- The University of Hong Kong; Hong Kong Sanatorium & Hospital; Hong Kong Hereditary Breast Cancer Family Registry
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Ng EKO, Li R, Shin VY, Siu JM, Ma ESK, Kwong A. MicroRNA-143 is downregulated in breast cancer and regulates DNA methyltransferases 3A in breast cancer cells. Tumour Biol 2013; 35:2591-8. [PMID: 24218337 DOI: 10.1007/s13277-013-1341-7] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Accepted: 10/16/2013] [Indexed: 12/12/2022] Open
Abstract
MicroRNAs (miRNAs) are small non-protein-coding RNAs that regulate expression of a wide variety of genes including those involved in cancer development. Here, we investigate the role of miR-143 in breast cancer. In this study, we showed that miR-143 was frequently downregulated in 80% of breast carcinoma tissues compared to their adjacent noncancerous tissues. Ectopic expression of miR-143 inhibited proliferation and soft agar colony formation of breast cancer cells and also downregulated DNA methyltransferase 3A (DNMT3A) expression on both mRNA and protein levels. Restoration of miR-143 expression in breast cancer cells reduces PTEN hypermethylation and increases TNFRSF10C methylation. DNMT3A was demonstrated to be a direct target of miR-143 by luciferase reporter assay. Furthermore, miR-143 expression was observed to be inversely correlated with DNMT3A mRNA and protein expression in breast cancer tissues. Our findings suggest that miR-143 regulates DNMT3A in breast cancer cells. These findings elucidated a tumor-suppressive role of miR-143 in epigenetic aberration of breast cancer, providing a potential development of miRNA-based treatment for breast cancer.
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Affiliation(s)
- Enders K O Ng
- Department of Surgery, The University of Hong Kong, Hong Kong SAR, Hong Kong
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Chu KM, Cho CH, Shin VY. Nicotine and gastrointestinal disorders: its role in ulceration and cancer development. Curr Pharm Des 2013; 19:5-10. [PMID: 22950507 DOI: 10.2174/13816128130103] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Accepted: 07/23/2012] [Indexed: 11/22/2022]
Abstract
Cigarette smoke has always been the single most preventive cause of death in the world. In 2011, over 460,000 died from cigarette smoke-related diseases in US. The detrimental effects of cigarette smoke on human beings are due to the presence of many carcinogens and other components (e.g. nicotine and tar). Nicotine is now accepted as one of the major components responsible for gastrointestinal disorders. Cigarette smoking, nicotine and a nicotine-derived nitrosamine, 4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) are considered as risk factors for gastrointestinal cancer, however, the underlying mechanism remains largely unknown. Previous studies reported that cigarette smoke and nicotine aggravated inflammation not only in the stomach, but also in the colon. The carcinogenic actions of cigarette smoke, nicotine and NNK on gastrointestinal cancers development have been widely studied. The strong association of cyclooxygenase-2 (COX-2) with gastrointestinal diseases has been extensively studied, however, due to the unresolved cardiovascular risk, it is of great importance to develop other new anti-cancer drugs for the treatment of cancers. This current review aims to provide an overview of the effects of cigarette smoke, nicotine and NNK on gastrointestinal inflammation, and also the carcinogenic properties in cancer development (tumor growth, angiogenesis and epithelial-mesenchymal transition). In addition, current studies on nicotinic acetylcholine receptors, adrenergic receptors and miRNAs in nicotine-related cancer pathogenesis are also highlighted.
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Affiliation(s)
- Kent-Man Chu
- Department of Surgery, Faculty of Medicine, The University of Hong Kong, Hong Kong
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Ng EKO, Li R, Shin VY, Jin HC, Leung CPH, Ma ESK, Pang R, Chua D, Chu KM, Law WL, Law SYK, Poon RTP, Kwong A. Circulating microRNAs as specific biomarkers for breast cancer detection. PLoS One 2013; 8:e53141. [PMID: 23301032 PMCID: PMC3536802 DOI: 10.1371/journal.pone.0053141] [Citation(s) in RCA: 195] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Accepted: 11/23/2012] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND We previously showed microRNAs (miRNAs) in plasma are potential biomarkers for colorectal cancer detection. Here, we aimed to develop specific blood-based miRNA assay for breast cancer detection. METHODOLOGY/PRINCIPAL FINDINGS TaqMan-based miRNA profiling was performed in tumor, adjacent non-tumor, corresponding plasma from breast cancer patients, and plasma from matched healthy controls. All putative markers identified were verified in a training set of breast cancer patients. Selected markers were validated in a case-control cohort of 170 breast cancer patients, 100 controls, and 95 other types of cancers and then blindly validated in an independent set of 70 breast cancer patients and 50 healthy controls. Profiling results showed 8 miRNAs were concordantly up-regulated and 1 miRNA was concordantly down-regulated in both plasma and tumor tissue of breast cancer patients. Of the 8 up-regulated miRNAs, only 3 were significantly elevated (p<0.0001) before surgery and reduced after surgery in the training set. Results from the validation cohort showed that a combination of miR-145 and miR-451 was the best biomarker (p<0.0001) in discriminating breast cancer from healthy controls and all other types of cancers. In the blind validation, these plasma markers yielded Receiver Operating Characteristic (ROC) curve area of 0.931. The positive predictive value was 88% and the negative predictive value was 92%. Altered levels of these miRNAs in plasma have been detected not only in advanced stages but also early stages of tumors. The positive predictive value for ductal carcinoma in situ (DCIS) cases was 96%. CONCLUSIONS These results suggested that these circulating miRNAs could be a potential specific biomarker for breast cancer screening.
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Affiliation(s)
- Enders K. O. Ng
- Department of Surgery, The University of Hong Kong, Hong Kong, China
- Department of Molecular Pathology, Hong Kong Sanatorium and Hospital, Hong Kong, China
| | - Rufina Li
- Department of Surgery, The University of Hong Kong, Hong Kong, China
| | - Vivian Y. Shin
- Department of Surgery, The University of Hong Kong, Hong Kong, China
| | - Hong Chuan Jin
- Biomedical Research Center, Sir Runrun Shaw Hospital, Medical School of Zhejiang University, Hangzhou, China
| | - Candy P. H. Leung
- Department of Surgery, The University of Hong Kong, Hong Kong, China
| | - Edmond S. K. Ma
- Department of Molecular Pathology, Hong Kong Sanatorium and Hospital, Hong Kong, China
| | - Roberta Pang
- Department of Surgery, The University of Hong Kong, Hong Kong, China
| | - Daniel Chua
- Department of Clinical Oncology, The University of Hong Kong, Hong Kong, China
| | - Kent-Man Chu
- Department of Surgery, The University of Hong Kong, Hong Kong, China
| | - W. L. Law
- Department of Surgery, The University of Hong Kong, Hong Kong, China
| | - Simon Y. K. Law
- Department of Surgery, The University of Hong Kong, Hong Kong, China
| | - Ronnie T. P. Poon
- Department of Surgery, The University of Hong Kong, Hong Kong, China
| | - Ava Kwong
- Department of Surgery, The University of Hong Kong, Hong Kong, China
- Department of Molecular Pathology, Hong Kong Sanatorium and Hospital, Hong Kong, China
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Wong HPS, Ho JWC, Koo MWL, Yu L, Wu WKK, Lam EKY, Tai EKK, Ko JKS, Shin VY, Chu KM, Cho CH. Effects of adrenaline in human colon adenocarcinoma HT-29 cells. Life Sci 2011; 88:1108-12. [PMID: 21565206 DOI: 10.1016/j.lfs.2011.04.007] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Revised: 03/24/2011] [Accepted: 04/02/2011] [Indexed: 12/18/2022]
Abstract
AIMS Stress has been implicated in the development of cancers. Adrenaline levels are increased in response to stress. The effects of adrenaline on colon cancer are largely unknown. The aims of the study are to determine the effects of adrenaline in human colon adenocarcinoma HT-29 cells and the possible underlying mechanisms involved. MAIN METHODS The effect of adrenaline on HT-29 cell proliferation was determined by [(3)H] thymidine incorporation assay. Expression of cyclooxygenase-2 (COX-2) and vascular endothelial growth factor (VEGF) were detected by Western blot. Matrix metalloproteinase-9 (MMP-9) activity and prostaglandin E(2) (PGE(2)) release were determined by zymography and enzyme immunoassay, respectively. KEY FINDINGS Adrenaline stimulated HT-29 cell proliferation. This was accompanied by the enhanced expression of COX-2 and VEGF in HT-29 cells. Adrenaline also upregulated MMP-9 activity and PGE(2) release. Adrenaline stimulated HT-29 cell proliferation which was reversed by COX-2 inhibitor sc-236. COX-2 inhibitor also reverted the action of adrenaline on VEGF expression and MMP-9 activity. Further study was performed to determine the involvement of β-adrenoceptors. The stimulatory action of adrenaline on colon cancer growth was blocked by atenolol and ICI 118,551, a β(1)- and β(2)-selective antagonist, respectively. This signified the role of β-adrenoceptors in this process. In addition, both antagonists also abrogated the stimulating actions of adrenaline on COX-2, VEGF expression, MMP-9 activity and PGE(2) release in HT-29 cells. SIGNIFICANCE These results suggest that adrenaline stimulates cell proliferation of HT-29 cells via both β(1)- and β(2)-adrenoceptors by a COX-2 dependent pathway.
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Affiliation(s)
- Helen P S Wong
- Department of Pharmacology and Pharmacy, The University of Hong Kong, Hong Kong, China
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Shin VY, Jin HC, Ng EKO, Cho CH, Leung WK, Sung JJY, Chu KM. 4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanone promoted gastric cancer growth through prostaglandin E receptor (EP2 and EP4) in vivo and in vitro. Cancer Sci 2011; 102:926-33. [DOI: 10.1111/j.1349-7006.2011.01885.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Abstract
Oncogenic Ras mutations are rare in gastric cancer, indicating that other mechanisms may be responsible for aberrant Ras activation in this type of cancer. Ezrin is critical to Ras activation by remodeling cortical actin cy-toskeleton. In this study, we aimed to illustrate the relevance and regulation of ezrin in gastric cancer. Ezrin was upregulated in gastric cancer cells. Ezrin siRNA inhibited Ras activation, cell growth and cell migration. Ezrin overex-pression was correlated with a poor outcome of gastric cancer patients (n=150, p<0.01). Cox regression analysis revealed a significant value of ezrin expression in prognosis prediction of gastric cancer (relative risk: 2.37, 95% confidence interval: 1.24-4.56, p<0.01). MiR-204, which was predicted to target ezrin, was downregulated in gastric cancer cells and gastric carcinomas (n=22, p<0.01). MiR-204 inhibited ezrin expression, Ras activation, cell growth and cell migration. Importantly, miR-204 suppressed the expression of luciferase controlled by wild-type but not mutated ezrin 3'-UTR. In conclusion, ezrin is important to Ras activation in gastric cancer. Its upregulation is an independent prognosis prediction factor for gastric cancer. By contributing to ezrin upregulation, miR-204 downregulation represents a novel mechanism for aberrant Ras activation in gastric carcinogenesis.
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Ng EKO, Leung C, Shin VY, Chan A, Wong CLPL, Ma ESK, Jin HC, Chu KM, Kwong A. Abstract P3-01-02: Quantitative Analysis and Diagnostic Significance of Methylated SLC19A3 DNA in the Plasma of Breast Cancer Patients. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-p3-01-02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Previously, we have examined the methylation status of SLC19A3 (solute carrier family 19, member 3) promoter and found that SLC19A3 was epigenetically down-regulated in gastric cancer. Here, we aim to develop a new biomarker for cancer diagnosis using methylated SLC19A3 DNA in plasma.
Methods: SLC19A3 gene expression was examined by RT-qPCR. Methylation status of SLC19A3 promoter was evaluated by methylation-specific qPCR. A robust and simple methylation-sensitive restriction enzyme digestion and real-time quantitative PCR assay was developed to quantify SLC19A3 DNA methylation in plasma. Results: Expression of SLC19A3 was significantly down-regulated in 80% (12/15) of breast tumors (P < 0.005). Breast tumors had significant increase in methylation percentage when compared to adjacent non-tumor tissues (P < 0.05). A total of 155 independent plasma samples from participants including 60 breast cancer, 45 gastric cancer patients and 60 healthy subjects were analyzed. Plasma methylated SLC19A3 DNA yielded a ROC curve area of 77%, sensitivity of 82% and specificity of 60% in discriminating breast cancer from control subjects. This marker yielded a ROC curve area of 87%, sensitivity of 90.0% and specificity of 62% in discriminating gastric cancer from control subjects. Elevated level in plasma has been detected not only in advanced stages but also early stages of tumors. Intriguingly, of all DCIS cases from breast cancer patients this plasma marker generated a ROC value of 92%, sensitivity of 100% and specificity of 78% in discriminating DCIS cases from controls. Conclusions: These results suggested that aberrant SLC19A3 promoter hypermethylation in plasma may be a novel biomarker for early breast cancer diagnosis.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr P3-01-02.
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Affiliation(s)
- EKO Ng
- The University of Hong Kong, Pokfulam, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Sir Runrun Shaw Hospital, Zhejiang University, China
| | - C Leung
- The University of Hong Kong, Pokfulam, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Sir Runrun Shaw Hospital, Zhejiang University, China
| | - VY Shin
- The University of Hong Kong, Pokfulam, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Sir Runrun Shaw Hospital, Zhejiang University, China
| | - A Chan
- The University of Hong Kong, Pokfulam, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Sir Runrun Shaw Hospital, Zhejiang University, China
| | - CLPL Wong
- The University of Hong Kong, Pokfulam, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Sir Runrun Shaw Hospital, Zhejiang University, China
| | - ESK Ma
- The University of Hong Kong, Pokfulam, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Sir Runrun Shaw Hospital, Zhejiang University, China
| | - HC Jin
- The University of Hong Kong, Pokfulam, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Sir Runrun Shaw Hospital, Zhejiang University, China
| | - KM Chu
- The University of Hong Kong, Pokfulam, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Sir Runrun Shaw Hospital, Zhejiang University, China
| | - A. Kwong
- The University of Hong Kong, Pokfulam, Hong Kong; Hong Kong Sanatorium & Hospital, Hong Kong; Sir Runrun Shaw Hospital, Zhejiang University, China
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Shin VY, Jin H, Ng EKO, Cheng ASL, Chong WWS, Wong CYP, Leung WK, Sung JJY, Chu KM. NF-κB targets miR-16 and miR-21 in gastric cancer: involvement of prostaglandin E receptors. Carcinogenesis 2010; 32:240-5. [PMID: 21081469 DOI: 10.1093/carcin/bgq240] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Cigarette smoke is one of the risk factors for gastric cancer and nicotine has been reported to promote tumor growth. Deregulation of microRNA (miRNA) and cyclooxygenase-2 (COX-2) expressions are hallmarks of many cancers including gastric cancer. Here, we used an miRNA array platform covering a panel of 95 human miRNAs to examine the expression profile in nicotine-treated gastric cancer cells. We found that miR-16 and miR-21 were upregulated upon nicotine stimulation, transfection with anti-miR-16 or anti-miR-21 significantly abrogated cell proliferation. In contrast, ectopic miR-16 or miR-21 expression exhibited a similar stimulatory effect on cell proliferation as nicotine. Nicotine-mediated IkappaBα degradation and nuclear factor-kappa B (NF-κB) translocation dose-dependently. Knockdown of NF-κB by short interfering RNA (siRNA) or specific inhibitor (Bay-11-7085) markedly suppressed nicotine-induced cell proliferation and upregulation of miR-16 and miR-21. Interestingly, NF-κB-binding sites were located in both miR-16 and miR-21 gene transcriptional elements and we showed that nicotine enhanced the binding of NF-κB to the promoters of miR-16 and miR-21. Furthermore, activation of COX-2/prostaglandin E₂ (PGE₂) signaling in response to nicotine was mediated by the action of prostaglandin E receptors (EP2 and EP4). EP2 or EP4 siRNA or antagonists impaired the nicotine-mediated NF-κB activity, upregulation of miR-16 and miR-21 and cell proliferation. Taken together, these results suggest that miR-16 and miR-21 are directly regulated by the transcription factor NF-κB and yet nicotine-promoted cell proliferation is mediated via EP2/4 receptors. Perhaps this study may shed light on the development of anticancer drugs to improve the chemosensitivity in smokers.
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Affiliation(s)
- Vivian Y Shin
- Department of Surgery, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong SAR, China.
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Liu X, Wang X, Zhang J, Lam EKY, Shin VY, Cheng ASL, Yu J, Chan FKL, Sung JJY, Jin HC. Warburg effect revisited: an epigenetic link between glycolysis and gastric carcinogenesis. Oncogene 2009; 29:442-50. [PMID: 19881551 DOI: 10.1038/onc.2009.332] [Citation(s) in RCA: 134] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In cancer cells, glucose is often converted into lactic acid, which is known as the 'Warburg effect'. The reason that cancer cells have a higher rate of aerobic glycolysis, but not oxidative phosphorylation, remains largely unclear. Herein, we proposed an epigenetic mechanism of the Warburg effect. Fructose-1,6-bisphosphatase-1 (FBP1), which functions to antagonize glycolysis was downregulated through NF-kappaB pathway in Ras-transformed NIH3T3 cells. Restoration of FBP1 expression suppressed anchorage-independent growth, indicating the relevance of FBP1 downregulation in carcinogenesis. Indeed, FBP1 was downregulated in gastric carcinomas (P<0.01, n=22) and gastric cancer cell lines (57%, 4/7). Restoration of FBP1 expression reduced growth and glycolysis in gastric cancer cells. Moreover, FBP1 downregulation was reversed by pharmacological demethylation. Its promoter was hypermethylated in gastric cancer cell lines (57%, 4/7) and gastric carcinomas (33%, 33/101). Inhibition of NF-kappaB restored FBP1 expression, partially through demethylation of FBP1 promoter. Notably, Cox regression analysis revealed FBP1 promoter methylation as an independent prognosis predicator for gastric cancer (hazard ratio: 3.60, P=0.010). In summary, we found that NF-kappaB functions downstream of Ras to promote epigenetic downregulation of FBP1. Promoter methylation of FBP1 can be used as a new biomarker for prognosis prediction of gastric cancer. Such an important epigenetic link between glycolysis and carcinogenesis partly explains the Warburg effect.
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Affiliation(s)
- X Liu
- Institute of Digestive Disease, The Chinese University of Hong Kong, Hong Kong, China
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Ng EKO, Chong WWS, Jin H, Lam EKY, Shin VY, Yu J, Poon TCW, Ng SSM, Sung JJY. Differential expression of microRNAs in plasma of patients with colorectal cancer: a potential marker for colorectal cancer screening. Gut 2009. [PMID: 19201770 DOI: 10.1136/gut.2008.167817;] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
OBJECTIVE MicroRNAs (miRNAs) have been shown to offer great potential in the diagnosis of cancer. We investigated whether plasma miRNAs could discriminate between patients with and without colorectal cancer (CRC). METHODS This study was divided into three phases: (1) marker discovery using real-time PCR-based miRNA profiling on plasma, corresponding cancerous and adjacent non-cancerous colonic tissues of five patients with CRC, along with plasma from five healthy individuals as controls; (2) marker selection and validation by real-time quantitative RT-PCR on a small set of plasma; and (3) independent validation on a large set of plasma from 90 patients with CRC, 20 patients with gastric cancer, 20 patients with inflammatory bowel disease (IBD) and 50 healthy controls. RESULTS Of the panel of 95 miRNAs analysed, five were upregulated both in plasma and tissue samples. All the five miRNAs were validated on the plasma of 25 patients with CRC and 20 healthy controls. Both miR-17-3p and miR-92 were significantly elevated in the patients with CRC (p<0.0005). The plasma levels of these markers were significantly reduced after surgery in 10 patients with CRC (p<0.05). Further validation with an independent set of plasma samples (n = 180) indicated that miR-92 differentiates CRC from gastric cancer, IBD and normal subjects. This marker yielded a receiver operating characteristic curve area of 88.5%. At a cut-off of 240 (relative expression in comparison to RNU6B snRNA), the sensitivity was 89% and the specificity was 70% in discriminating CRC from control subjects. CONCLUSION MiR-92 is significantly elevated in plasma of patients with CRC and can be a potential non-invasive molecular marker for CRC screening.
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Affiliation(s)
- E K O Ng
- Institute of Digestive Disease, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong SAR, China
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Ng EKO, Chong WWS, Jin H, Lam EKY, Shin VY, Yu J, Poon TCW, Ng SSM, Sung JJY. Differential expression of microRNAs in plasma of patients with colorectal cancer: a potential marker for colorectal cancer screening. Gut 2009; 58:1375-81. [PMID: 19201770 DOI: 10.1136/gut.2008.167817] [Citation(s) in RCA: 938] [Impact Index Per Article: 62.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE MicroRNAs (miRNAs) have been shown to offer great potential in the diagnosis of cancer. We investigated whether plasma miRNAs could discriminate between patients with and without colorectal cancer (CRC). METHODS This study was divided into three phases: (1) marker discovery using real-time PCR-based miRNA profiling on plasma, corresponding cancerous and adjacent non-cancerous colonic tissues of five patients with CRC, along with plasma from five healthy individuals as controls; (2) marker selection and validation by real-time quantitative RT-PCR on a small set of plasma; and (3) independent validation on a large set of plasma from 90 patients with CRC, 20 patients with gastric cancer, 20 patients with inflammatory bowel disease (IBD) and 50 healthy controls. RESULTS Of the panel of 95 miRNAs analysed, five were upregulated both in plasma and tissue samples. All the five miRNAs were validated on the plasma of 25 patients with CRC and 20 healthy controls. Both miR-17-3p and miR-92 were significantly elevated in the patients with CRC (p<0.0005). The plasma levels of these markers were significantly reduced after surgery in 10 patients with CRC (p<0.05). Further validation with an independent set of plasma samples (n = 180) indicated that miR-92 differentiates CRC from gastric cancer, IBD and normal subjects. This marker yielded a receiver operating characteristic curve area of 88.5%. At a cut-off of 240 (relative expression in comparison to RNU6B snRNA), the sensitivity was 89% and the specificity was 70% in discriminating CRC from control subjects. CONCLUSION MiR-92 is significantly elevated in plasma of patients with CRC and can be a potential non-invasive molecular marker for CRC screening.
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Affiliation(s)
- E K O Ng
- Institute of Digestive Disease, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong SAR, China
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Wu WKK, Wu WKK, Law PTY, Law PTY, Wong HPS, Wong HPS, Lam EKY, Lam EKY, Tai EKK, Tai EKK, Shin VY, Shin VY, Cho CH, Cho CH. Shift of homeostasis from parenchymal regeneration to fibroblast proliferation induced by lipopolysaccharide-activated macrophages in gastric mucosal healing in vitro. Wound Repair Regen 2007; 15:221-6. [PMID: 17352754 DOI: 10.1111/j.1524-475x.2007.00208.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Wound healing in the gastrointestinal tract is an orderly process involving orchestrated responses of various cell types. Lipopolysaccharides (LPS) are major components of the outer membrane of Gram-negative bacteria, which are known to impair gastric ulcer healing in animals. The influence of LPS on intercellular communication in wound healing, however, is unknown. We examined the effects of LPS-induced macrophage activation on the proliferative response in cultured rat gastric epithelial cells (RGM-1) and fibroblasts JHU-25. Rat peritoneal resident macrophages were activated with increasing doses of LPS. The supernatant from the activated macrophage preparation, designated as macrophage-conditioned medium, was then used to treat RGM-1 or JHU-25 cells. Cell proliferation and migration were determined by [(3)H]-thymidine incorporation and a monolayer wound-healing assay, respectively. Macrophage-conditioned medium significantly suppressed RGM-1 cell proliferation but had no effect on cell migration. The same medium, however, increased JHU-25 cell proliferation. LPS treatment alone suppressed JHU-25 cell proliferation while it had no effect on RGM-1 cell proliferation, indicating that the differential effects of the macrophage-conditioned medium on cell proliferation were elicited by the factors derived from macrophages. In this regard, tumor necrosis factor (TNF)-alpha stimulated while interleukin (IL)-1beta suppressed RGM-1 cell proliferation, suggesting that IL-1beta but not TNF-alpha may play a part in the mediation of the antiproliferative effect of macrophage-conditioned medium on gastric epithelial cells. In contrast, IL-1beta suppressed while TNF-alpha had no effect on JHU-25 cell proliferation. Collectively, LPS-activated macrophages delay gastric mucosal regeneration but promote fibroblast proliferation in vitro. Such changes may partly elucidate the detrimental effect of bacterial infection on tissue repair in the stomach.
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Affiliation(s)
- William K K Wu
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Shatin, Hong Kong
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Lam EKY, Yu L, Wong HPS, Wu WKK, Shin VY, Tai EKK, So WHL, Woo PCY, Cho CH. Probiotic Lactobacillus rhamnosus GG enhances gastric ulcer healing in rats. Eur J Pharmacol 2007; 565:171-9. [PMID: 17395175 DOI: 10.1016/j.ejphar.2007.02.050] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2006] [Revised: 02/09/2007] [Accepted: 02/13/2007] [Indexed: 12/19/2022]
Abstract
Probiotics are widely used as functional foods which have been advocated for the maintenance of gastrointestinal microflora equilibrium and treatment of gastrointestinal disorders. However, studying the role of probiotics in peptic ulcer disease is limited. The aim of the present study is to investigate the effect of a probiotic strain Lactobacillus rhamnosus GG on gastric ulcer and to elucidate the mechanisms involved. Gastric kissing ulcers were induced in rats by acetic acid (60% v/v). L. rhamnosus GG was given intragastrically at 10(8) cfu/day or 10(9) cfu/day for three consecutive days after ulcer induction. L. rhamnosus GG successfully colonized in the gastric mucosa especially at the ulcer margin. It also significantly and dose-dependently reduced gastric ulcer area. Cell apoptosis to cell proliferation ratio was strongly decreased and accompanied by significant up-regulation of ornithine decarboxylase (ODC) and B-cell lymphoma 2 (Bcl-2) protein expression at the ulcer margin. Angiogenesis was also significantly stimulated together with the induction of vascular endothelial growth factor (VEGF) expression. Furthermore, L. rhamnosus GG up-regulated the phosphorylation level of epidermal growth factor receptor (EGF receptor) without altering the total EGF receptor expression. These findings suggested that L. rhamnosus GG enhanced gastric ulcer healing via the attenuation of cell apoptosis to cell proliferation ratio and increase in angiogenesis. Regulators of these processes such as ODC, Bcl-2, VEGF and EGF receptor are likely to be involved in the healing action of L. rhamnosus GG for gastric ulcer.
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Affiliation(s)
- Emily K Y Lam
- Department of Pharmacology, The University of Hong Kong, China
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Yang YH, Wu WKK, Tai EKK, Wong HPS, Lam EKY, So WHL, Shin VY, Cho CH. The cationic host defense peptide rCRAMP promotes gastric ulcer healing in rats. J Pharmacol Exp Ther 2006; 318:547-54. [PMID: 16670350 DOI: 10.1124/jpet.106.102467] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Cathelicidin, a cationic host defense peptide, has been shown to promote cutaneous wound repair and reaches high levels in the gastric mucosa during infection and inflammation. Therefore, we investigated whether this peptide contributes to gastric ulcer healing in rats. Ulcer induction increased the expression of rat cathelicidin rCRAMP in the gastric mucosa. Further increase in expression of rCRAMP by local injection of rCRAMP-encoding plasmid promoted ulcer healing by enhancing cell proliferation and angiogenesis. rCRAMP directly stimulated proliferation of cultured rat gastric epithelial cells (RGM-1), which was abolished by inhibitors of matrix metalloproteinase (MMP), epidermal growth factor receptors (EGFR) tyrosine kinase, or mitogen-activated protein kinase/extracellular signal-regulated kinase (ERK) kinase. rCRAMP also increased EGFR and ERK1/2 phosphorylation via an MMP-dependent mechanism. Knockdown of transforming growth factor alpha (TGFalpha), which is a ligand of EGFR, by small interfering RNA completely nullified the mitogenic signals evoked by rCRAMP in RGM-1 cells. These findings suggest that rCRAMP exhibits prohealing activity in stomachs through TGFalpha-dependent transactivation of EGFR and its related signaling pathway to induce proliferation of gastric epithelial cells.
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Affiliation(s)
- Ying H Yang
- Department of Pharmacology, Faculty of Medicine, The University of Hong Kong, 21 Sassoon Road, Hong Kong, China
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Shin VY, Wu WKK, Chu KM, Wong HPS, Lam EKY, Tai EKK, Koo MWL, Cho CH. Nicotine induces cyclooxygenase-2 and vascular endothelial growth factor receptor-2 in association with tumor-associated invasion and angiogenesis in gastric cancer. Mol Cancer Res 2006; 3:607-15. [PMID: 16317086 DOI: 10.1158/1541-7786.mcr-05-0106] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Blockade of angiogenesis is a promising strategy to suppress tumor growth, invasion, and metastasis. Vascular endothelial growth factor (VEGF), which binds to tyrosine kinase receptors [VEGF receptors (VEGFR) 1 and 2], is the mediator of angiogenesis and mitogen for endothelial cells. Cyclooxygenase-2 (COX-2) plays an important role in the promoting action of nicotine on gastric cancer growth. However, the action of nicotine and the relationship between COX-2 and VEGF/VEGFR system in tumorigenesis remain undefined. In this study, the effects of nicotine in tumor angiogenesis, invasiveness, and metastasis were studied with sponge implantation and Matrigel membrane models. Nicotine (200 microg/mL) stimulated gastric cancer cell proliferation, which was blocked by SC-236 (a highly selective COX-2 inhibitor) and CBO-P11 (a VEGFR inhibitor). This was associated with decreased VEGF levels as well as VEGFR-2 but not VEGFR-1 expression. Topical injection of nicotine enhanced tumor-associated vascularization, with a concomitant increase in VEGF levels in sponge implants. Again, application of SC-236 (2 mg/kg) and CBO-P11 (0.4 mg/kg) partially attenuated vascularization by approximately 30%. Furthermore, nicotine enhanced tumor cell invasion through the Matrigel membrane by 4-fold and promoted migration of human umbilical vein endothelial cells in a cocultured system with gastric cancer cells. The activity of matrix metalloproteinases 2 and 9 and protein expressions of plasminogen activators (urokinase-type plasminogen activator and its receptor), which are the indicators of invasion and migration processes, were increased by nicotine but blocked by COX-2 and VEGFR inhibitors. Taken together, our results reveal that the promoting action of nicotine on angiogenesis, tumor invasion, and metastasis is COX-2/VEGF/VEGFR dependent.
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Affiliation(s)
- Vivian Y Shin
- Department of Pharmacology, Faculty of Medicine, The University of Hong Kong, 21 Sassoon Road, Hong Kong, Hong Kong
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