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Chan DW, Lam WY, Chen F, Yung MMH, Chan YS, Chan WS, He F, Liu SS, Chan KKL, Li B, Ngan HYS. Genome-wide DNA methylome analysis identifies methylation signatures associated with survival and drug resistance of ovarian cancers. Clin Epigenetics 2021; 13:142. [PMID: 34294135 PMCID: PMC8296615 DOI: 10.1186/s13148-021-01130-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 07/12/2021] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND In contrast to stable genetic events, epigenetic changes are highly plastic and play crucial roles in tumor evolution and development. Epithelial ovarian cancer (EOC) is a highly heterogeneous disease that is generally associated with poor prognosis and treatment failure. Profiling epigenome-wide DNA methylation status is therefore essential to better characterize the impact of epigenetic alterations on the heterogeneity of EOC. METHODS An epigenome-wide association study was conducted to evaluate global DNA methylation in a retrospective cohort of 80 mixed subtypes of primary ovarian cancers and 30 patients with high-grade serous ovarian carcinoma (HGSOC). Three demethylating agents, azacytidine, decitabine, and thioguanine, were tested their anti-cancer and anti-chemoresistant effects on HGSOC cells. RESULTS Global DNA hypermethylation was significantly associated with high-grade tumors, platinum resistance, and poor prognosis. We determined that 9313 differentially methylated probes (DMPs) were enriched in their relative gene regions of 4938 genes involved in small GTPases and were significantly correlated with the PI3K-AKT, MAPK, RAS, and WNT oncogenic pathways. On the other hand, global DNA hypermethylation was preferentially associated with recurrent HGSOC. A total of 2969 DMPs corresponding to 1471 genes were involved in olfactory transduction, and calcium and cAMP signaling. Co-treatment with demethylating agents showed significant growth retardation in ovarian cancer cells through differential inductions, such as cell apoptosis by azacytidine or G2/M cell cycle arrest by decitabine and thioguanine. Notably, azacytidine and decitabine, though not thioguanine, synergistically enhanced cisplatin-mediated cytotoxicity in HGSOC cells. CONCLUSIONS This study demonstrates the significant association of global hypermethylation with poor prognosis and drug resistance in high-grade EOC and highlights the potential of demethylating agents in cancer treatment.
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Affiliation(s)
- David W Chan
- Department of Obstetrics and Gynaecology, L747 Laboratory Block, LKS Faculty of Medicine, 21 Sassoon Road, Pokfulam, Hong Kong, SAR, People's Republic of China.
| | - Wai-Yip Lam
- Lee's Pharmaceutical (HK) Ltd, 1/F Building 20E, Phase 3, Hong Kong Science Park, Shatin, Hong Kong, People's Republic of China
| | - Fushun Chen
- Department of Obstetrics and Gynaecology, L747 Laboratory Block, LKS Faculty of Medicine, 21 Sassoon Road, Pokfulam, Hong Kong, SAR, People's Republic of China
| | - Mingo M H Yung
- Department of Obstetrics and Gynaecology, L747 Laboratory Block, LKS Faculty of Medicine, 21 Sassoon Road, Pokfulam, Hong Kong, SAR, People's Republic of China
| | - Yau-Sang Chan
- Department of Obstetrics and Gynaecology, L747 Laboratory Block, LKS Faculty of Medicine, 21 Sassoon Road, Pokfulam, Hong Kong, SAR, People's Republic of China
| | - Wai-Sun Chan
- Department of Obstetrics and Gynaecology, L747 Laboratory Block, LKS Faculty of Medicine, 21 Sassoon Road, Pokfulam, Hong Kong, SAR, People's Republic of China
| | - Fangfang He
- Department of Obstetrics and Gynaecology, L747 Laboratory Block, LKS Faculty of Medicine, 21 Sassoon Road, Pokfulam, Hong Kong, SAR, People's Republic of China
| | - Stephanie S Liu
- Department of Obstetrics and Gynaecology, L747 Laboratory Block, LKS Faculty of Medicine, 21 Sassoon Road, Pokfulam, Hong Kong, SAR, People's Republic of China
| | - Karen K L Chan
- Department of Obstetrics and Gynaecology, L747 Laboratory Block, LKS Faculty of Medicine, 21 Sassoon Road, Pokfulam, Hong Kong, SAR, People's Republic of China
| | - Benjamin Li
- Lee's Pharmaceutical (HK) Ltd, 1/F Building 20E, Phase 3, Hong Kong Science Park, Shatin, Hong Kong, People's Republic of China
| | - Hextan Y S Ngan
- Department of Obstetrics and Gynaecology, L747 Laboratory Block, LKS Faculty of Medicine, 21 Sassoon Road, Pokfulam, Hong Kong, SAR, People's Republic of China. .,Department of Obstetrics and Gynaecology, 6/F Professorial Block, Queen Mary Hospital, Pokfulam, Hong Kong, People's Republic of China.
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Mutational Aberrations Detected in Mucinous Epithelial Ovarian Cancer of Asian Women. Int J Gynecol Cancer 2018; 28:428-436. [PMID: 29465505 DOI: 10.1097/igc.0000000000001138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Mucinous epithelial ovarian cancers (mEOCs) respond poorly to conventional chemotherapy and have a poor prognosis in advanced stages. The genomic landscape for mEOC in the Asian settings is ill defined. We seek to identify various mutational aberrations present in mEOC and correlate them with clinical outcomes. METHODS A total of 199 cases of mEOC were identified from a prospectively maintained gynecologic oncology tumor database. DNA was extracted and analyzed for KRAS mutations by using Sanger sequencing. Further MassArray sequencing was performed on 45 samples. Clinicopathologic correlation was performed with the results obtained. FINDINGS KRAS mutation status was evaluable in 124 cases. Fifty-five percent (68/124) were KRAS negative, whereas 45% (56/124) harbored a KRAS mutation, lower than that in Western populations. Successful ascertainment of both KRAS and HER2 statuses by Sanger sequencing occurred for 105 cases. The proportion of the double-positive subtype (HER2+ and KRAS positive) was 8% (8/105); double-negative subtype (HER2- and KRAS negative), 34% (36/105); and cases with mutation in either KRAS or HER2, 58% (61/105). The KRAS mutation rate was 44%, 50%, and 29% among Chinese, Indians, and Malays, respectively. There was no significant difference in overall survival (P = 0.952) or progression-free survival (P = 0.635) between KRAS-positive and KRAS-negative patients. Similar results were observed for progression-free survival (P = 0.206) and overall survival (P = 0.440) when outcomes were examined between the 4 groups based on KRAS and HER2 mutation. Patients in the double-negative mutation subgroup had higher risk for death/progression compared with patients in the other 3 mutation subgroups. Further MassARRAY multiplexed profiling was performed in patients with sufficient DNA material (n = 45) and yielded KRAS mutations (n = 16), PDGFRA mutations (n = 3), PIK3CA (n = 1) and KIT (n = 1), and HRAS, FGFR, MET, and NRAS (n = 1 each). CONCLUSIONS Our study provides further knowledge about the mutational aberrations in mEOC in Asian populations. Neither the presence of KRAS mutation nor their correlation with HER2 mutations influenced outcomes.
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Ovarian Cancers: Genetic Abnormalities, Tumor Heterogeneity and Progression, Clonal Evolution and Cancer Stem Cells. MEDICINES 2018; 5:medicines5010016. [PMID: 29389895 PMCID: PMC5874581 DOI: 10.3390/medicines5010016] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 01/11/2018] [Accepted: 01/12/2018] [Indexed: 02/07/2023]
Abstract
Four main histological subtypes of ovarian cancer exist: serous (the most frequent), endometrioid, mucinous and clear cell; in each subtype, low and high grade. The large majority of ovarian cancers are diagnosed as high-grade serous ovarian cancers (HGS-OvCas). TP53 is the most frequently mutated gene in HGS-OvCas; about 50% of these tumors displayed defective homologous recombination due to germline and somatic BRCA mutations, epigenetic inactivation of BRCA and abnormalities of DNA repair genes; somatic copy number alterations are frequent in these tumors and some of them are associated with prognosis; defective NOTCH, RAS/MEK, PI3K and FOXM1 pathway signaling is frequent. Other histological subtypes were characterized by a different mutational spectrum: LGS-OvCas have increased frequency of BRAF and RAS mutations; mucinous cancers have mutation in ARID1A, PIK3CA, PTEN, CTNNB1 and RAS. Intensive research was focused to characterize ovarian cancer stem cells, based on positivity for some markers, including CD133, CD44, CD117, CD24, EpCAM, LY6A, ALDH1. Ovarian cancer cells have an intrinsic plasticity, thus explaining that in a single tumor more than one cell subpopulation, may exhibit tumor-initiating capacity. The improvements in our understanding of the molecular and cellular basis of ovarian cancers should lead to more efficacious treatments.
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Kim D, Kim SY, Lee JS, Hong YS, Kim JE, Kim KP, Kim J, Jang SJ, Yoon YK, Kim TW. Primary tumor location predicts poor clinical outcome with cetuximab in RAS wild-type metastatic colorectal cancer. BMC Gastroenterol 2017; 17:121. [PMID: 29169325 PMCID: PMC5701369 DOI: 10.1186/s12876-017-0694-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 11/17/2017] [Indexed: 12/24/2022] Open
Abstract
Background In metastatic colorectal cancer, the location of the primary tumor has been suggested to have biological significance. In this study, we investigated whether primary tumor location affects cetuximab efficacy in patients with RAS wild-type metastatic colorectal cancer. Methods Genotyping by the SequenomMassARRAY technology platform (OncoMap) targeting KRAS, NRAS, PIK3CA, and BRAF was performed in tumors from 307 patients who had been given cetuximab as salvage treatment. Tumors with mutated RAS (KRAS or NRAS; n = 127) and those with multiple primary location (n = 10) were excluded. Right colon cancer was defined as a tumor located in the proximal part to splenic flexure. Results A total of 170 patients were included in the study (right versus left, 23 and 147, respectively). Patients with right colon cancer showed more mutated BRAF (39.1% vs. 5.4%), mutated PIK3CA (13% vs. 1.4%), poorly differentiated tumor (17.4% vs. 3.4%), and peritoneal involvement (26.1% vs. 8.8%) than those with left colon and rectal cancer. Right colon cancer showed poorer progression-free survival (2.0 vs.5.0 months, P = 0.002) and overall survival (4.1 months and 13.0 months, P < 0.001) than the left colon and rectal cancer. By multivariable analysis, BRAF mutation, right colon primary, poorly differentiated histology, and peritoneal involvement were associated with risk of death. Conclusions In RAS wild-type colon cancer treated with cetuximab as salvage treatment, right colon primary was associated with poorer survival outcomes than left colon and rectal cancer.
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Affiliation(s)
- Dalyong Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea.,Department of Hematology/Oncology, Yuseong Sun Hospital, 93, Bugyuseong-daero, Yuseong-gu, Daejeon, 34084, South Korea
| | - Sun Young Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Ji Sung Lee
- Clinical Research Center, Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Yong Sang Hong
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Jeong Eun Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Kyu-Pyo Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Jihun Kim
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Se Jin Jang
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Young-Kwang Yoon
- Clinical Research Center, Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea
| | - Tae Won Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea. .,Clinical Research Center, Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.
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Excluding Lynch syndrome in a female patient with metachronous DNA mismatch repair deficient colon- and ovarian cancer. Fam Cancer 2017; 17:415-420. [PMID: 29124495 PMCID: PMC5999177 DOI: 10.1007/s10689-017-0055-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Patients synchronously or metachronously presenting with ovarian and colon cancer can pose diagnostic challenges. A primary colon carcinoma can metastasize to one or both ovaries, two independent primary tumors can arise or an ovarian carcinoma can metastasize to the colon. Clinical and immunohistochemical characterization can aid the diagnosis. Recently, we reported that in difficult cases finding pathogenic APC variants supports a colonic origin.In this case report we describe the clinical history of a female patient suspected for Lynch syndrome. She was diagnosed with a bilateral ovarian cancer at age 44, followed by the detection of a colon carcinoma 12.5 months later. Lesions of both sites showed a DNA mismatch repair deficiency with immunohistochemical loss of MLH1 and PMS2 expression without MLH1 promoter hypermethylation. In absence of germline MMR gene variants identical somatic MLH1 and CTNNB1 gene variants were found, indicating a clonal relation. MMR germline mosaicism was made unlikely by ultra deep sequencing of the MLH1 variant in DNA isolated from normal mucosa, blood, urine and saliva. Although initially being suspect for Lynch syndrome it was eventually concluded that a metachronously diagnosed colon carcinoma that metastasized to both ovaries was most likely.
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Jeong JH, Kim J, Hong YS, Kim D, Kim JE, Kim SY, Kim KP, Yoon YK, Kim D, Chun SM, Park Y, Jang SJ, Kim TW. HER2 Amplification and Cetuximab Efficacy in Patients With Metastatic Colorectal Cancer Harboring Wild-type RAS and BRAF. Clin Colorectal Cancer 2017; 16:e147-e152. [PMID: 28223103 DOI: 10.1016/j.clcc.2017.01.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Revised: 11/25/2016] [Accepted: 01/13/2017] [Indexed: 12/23/2022]
Abstract
BACKGROUND Cetuximab has shown clinical benefit in patients with metastatic colorectal cancer (mCRC) harboring wild-type RAS. Human epidermal growth factor receptor 2 (HER2) amplification may be a mechanism of cetuximab resistance. We evaluated the association between HER2 amplification and cetuximab efficacy in patients with mCRC harboring wild-type RAS and BRAF. PATIENTS AND METHODS Between December 2003 and June 2013, we identified 142 patients with mCRC whose tumors harbored both wild-type exons 2, 3, and 4 in KRAS and NRAS, and wild-type exon 15 in BRAF using high throughput sequencing (OncoMap version 4.0). All patients received cetuximab after oxaliplatin, irinotecan, and fluoropyrimidine failure. HER2 status was determined using immunohistochemistry and silver in situ hybridization (SISH) and correlated with cetuximab efficacy. RESULTS Of 142 RAS and BRAF wild-type tumors, we observed 7 cases (4.9%) of HER2 amplification by SISH. After a median follow-up of 13.2 months (range, 1.4-78.1 months), median progression-free survival (PFS) was significantly different according to HER2 status: 3.1 months in patients with HER2 amplification compared with 5.6 months in those with non-amplified HER2 (hazard ratio, 2.73; 95% confidence interval, 1.18-6.31; P = .019). Overall survival (OS) was not significantly different between groups, although there was a tendency towards shorter OS in patients with HER2-amplified tumors (hazard ratio, 1.31; 95% confidence interval, 0.61-2.82; 10.1 vs. 13.5 months; P = .488). CONCLUSIONS HER2 amplification is predictive of shorter PFS after cetuximab treatment in patients with mCRC harboring wild-type RAS and BRAF. Further study is warranted for this patient population.
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Affiliation(s)
- Jae Ho Jeong
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jihun Kim
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Yong Sang Hong
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Dalyong Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jeong Eun Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Sun Young Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Kyu-Pyo Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Young-Kwang Yoon
- Clinical Research Center, Asan Institute of Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Deokhoon Kim
- Center for Cancer Genome Discovery, Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Sung-Min Chun
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Yangsoon Park
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Se Jin Jang
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Tae Won Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.
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Abstract
Genomic sequencing analyses of a variety of human cancers have revealed that massive mutations of cancer-relevant genes are the major alterations in cancerous cells, and their mutation frequencies or rates are highly associated with the development, progression, metastasis, and drug resistance of cancers as well as their clinical outcomes and prognosis. One predominant genetic alternation in human epithelial ovarian cancer (EOC) is the mutation of TP53 that encodes the tumor suppressor p53 protein. This essay will review the most recent progress in understanding the role of TP53 mutations in development, progression, and metastasis of EOC, and discuss the potential of TP53 mutations as diagnostic and prognostic biomarkers as well as therapeutic targets for EOC.
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Affiliation(s)
- Yu Zhang
- Department of Gynecology and Obstetrics, Xiang-Ya Hospital, Central South University, Changsha 410008, China
| | - Lan Cao
- Department of Gynecology and Obstetrics, Xiang-Ya Hospital, Central South University, Changsha 410008, China
| | - Daniel Nguyen
- Department of Biochemistry and Molecular Biology, Tulane Cancer Center, Tulane University School of Medicine, New Orleans, LA, USA
| | - Hua Lu
- Department of Biochemistry and Molecular Biology, Tulane Cancer Center, Tulane University School of Medicine, New Orleans, LA, USA
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Kakarmath S, Heller HT, Alexander CA, Cibas ES, Krane JF, Barletta JA, Lindeman NI, Frates MC, Benson CB, Gawande AA, Cho NL, Nehs M, Moore FD, Marqusee E, Kim MI, Larsen PR, Kwong N, Angell TE, Alexander EK. Clinical, Sonographic, and Pathological Characteristics of RAS-Positive Versus BRAF-Positive Thyroid Carcinoma. J Clin Endocrinol Metab 2016; 101:4938-4944. [PMID: 27689252 PMCID: PMC5155682 DOI: 10.1210/jc.2016-2620] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Mutations in the BRAF and RAS oncogenes are responsible for most well-differentiated thyroid cancer. Yet, our clinical understanding of how BRAF-positive and RAS-positive thyroid cancers differ is incomplete. OBJECTIVE We correlated clinical, radiographic, and pathological findings from patients with thyroid cancer harboring a BRAF or RAS mutation. DESIGN Prospective cohort study. SETTING Academic, tertiary care hospital. PATIENTS A total of 101 consecutive patients with well-differentiated thyroid cancer. MAIN OUTCOME MEASURE We compared the clinical, sonographic, and pathological characteristics of patients with BRAF-positive cancer to those with RAS-positive cancer. RESULTS Of 101 patients harboring these mutations, 71 were BRAF-positive, whereas 30 were RAS-positive. Upon sonographic evaluation, RAS-positive nodules were significantly larger (P = .04), although BRAF-positive nodules were more likely to harbor concerning sonographic characteristics (hypoechogenicity [P < .001]; irregular margins [P = .04]). Cytologically, 70% of BRAF-positive nodules were classified positive for PTC, whereas 87% of RAS-positive nodules were indeterminate (P < .001). Histologically, 96% of RAS-positive PTC malignancies were follicular variants of PTC, whereas 70% of BRAF-positive malignancies were classical variants of PTC. BRAF-positive malignancies were more likely to demonstrate extrathyroidal extension (P = .003), lymphovascular invasion (P = .02), and lymph node metastasis (P < .001). CONCLUSIONS BRAF-positive malignant nodules most often demonstrate worrisome sonographic features and are frequently associated with positive or suspicious Bethesda cytology. In contrast, RAS-positive malignancy most often demonstrates indolent sonographic features and more commonly associates with lower risk, "indeterminate" cytology. Because BRAF and RAS mutations are the most common molecular perturbations associated with well-differentiated thyroid cancer, these findings may assist with improved preoperative risk assessment by suggesting the likely molecular profile of a thyroid cancer, even when postsurgical molecular analysis is unavailable.
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Affiliation(s)
- Sujay Kakarmath
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Howard T Heller
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Caroline A Alexander
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Edmund S Cibas
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Jeffrey F Krane
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Justine A Barletta
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Neal I Lindeman
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Mary C Frates
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Carol B Benson
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Atul A Gawande
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Nancy L Cho
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Matthew Nehs
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Francis D Moore
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Ellen Marqusee
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Mathew I Kim
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - P Reed Larsen
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Norra Kwong
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Trevor E Angell
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
| | - Erik K Alexander
- Thyroid Section, Division of Endocrinology, Hypertension, and Diabetes (S.K., T.E.A., N.K., C.A.A., E.M., M.I.K., P.R.L., E.K.A.), and Departments of Radiology (H.T.H., M.C.F., C.B.B.), Pathology (E.S.C., J.F.K., J.A.B., N.I.L.), and Surgery (A.A.G., N.L.C., M.N., F.D.M.), The Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115
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9
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Fleitas T, Ibarrola-Villava M, Ribas G, Cervantes A. MassARRAY determination of somatic oncogenic mutations in solid tumors: Moving forward to personalized medicine. Cancer Treat Rev 2016; 49:57-64. [DOI: 10.1016/j.ctrv.2016.07.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 07/22/2016] [Indexed: 12/11/2022]
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10
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Kim KP, Kim JE, Hong YS, Ahn SM, Chun SM, Hong SM, Jang SJ, Yu CS, Kim JC, Kim TW. Paired Primary and Metastatic Tumor Analysis of Somatic Mutations in Synchronous and Metachronous Colorectal Cancer. Cancer Res Treat 2016; 49:161-167. [PMID: 27384156 PMCID: PMC5266409 DOI: 10.4143/crt.2015.490] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 05/27/2016] [Indexed: 12/13/2022] Open
Abstract
Purpose Although the mutation status of KRAS is highly concordant in primary and metastatic lesions, it has not been generalized to other major pathway genes. Materials and Methods In this study, 41 genes were evaluated and the mutational profiles were compared in 46 colorectal cancer patients with paired surgical specimens of primary and metastatic lesions: synchronous (n=27) and metachronous (n=19) lesions. A high-throughput mass spectrometry-based genotyping platform validated by orthogonal chemistry, OncoMap v.4.4, was used to evaluate the formalin-fixed, paraffin-embedded surgical specimens. The patients’ demographics, tumor characteristics, and microsatellite instability status were analyzed by a retrospective chart review. Results In this study,with OncoMap, mutationswere identified in 80.4% of patientswith the following frequency: KRAS (39.1%), TP53 (28.3%), APC (28.3%), PIK3CA (6.5%), BRAF (6.5%), and NRAS (4.3%). Although 19.6% (9/46) of the patients showed no gene mutations, 43.5% (20/46) and 37.0% (17/46) had mutations in one and two or more genes, respectively. The synchronous and metachronous lesions showed similar mutational profiles. Paired samples between primary and metastatic tumors differed in 7.4% (2/27) and 10.5% (2/19) for synchronous and metachronous according to OncoMap. Conclusion These findings indicate the major pathway genes, including KRAS, TP53, APC, PIK3CA, BRAF, and NRAS, are often concordant between the primary and metastatic lesions regardless of the temporal relationship of metastasis.
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Affiliation(s)
- Kyu-Pyo Kim
- Division of Oncology, Department of Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jeong-Eun Kim
- Division of Oncology, Department of Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Yong Sang Hong
- Division of Oncology, Department of Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Sung-Min Ahn
- Division of Oncology, Department of Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Sung Min Chun
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Seung-Mo Hong
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Se Jin Jang
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Chang Sik Yu
- Department of Colorectal Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jin Cheon Kim
- Department of Colorectal Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Tae Won Kim
- Division of Oncology, Department of Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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11
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Kim D, Hong YS, Kim JE, Kim KP, Lee JL, Chun SM, Kim J, Jang SJ, Kim TW. Use of a High-Throughput Genotyping Platform (OncoMap) for RAS Mutational Analysis to Predict Cetuximab Efficacy in Patients with Metastatic Colorectal Cancer. Cancer Res Treat 2016; 49:37-43. [PMID: 27121720 PMCID: PMC5266405 DOI: 10.4143/crt.2016.069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Accepted: 03/29/2016] [Indexed: 12/22/2022] Open
Abstract
PURPOSE Cetuximab demonstrates improved efficacy outcomes in patients with metastatic colorectal cancer (mCRC) harboring wild-type KRAS exon 2. Resistance to cetuximab is mediated by activating less frequent mutations in the RAS genes beyond KRAS exon 2. We performed extended RAS Mutational analysis using a high-throughput genotyping platform (OncoMap) and evaluated extended RAS analysis for predicting cetuximab efficacy in patients harboring wild-type KRAS exon 2 tumors following Sanger sequencing. MATERIALS AND METHODS Extended RAS analysis was performed on 227 wild-type KRAS exon 2 mCRC patients who received cetuximab as salvage treatment using OncoMap ver. 4.0. Targeted genes included exon 2, exon 3, and exon 4, both in KRAS and NRAS, and included BRAF exon 15. We assessed efficacy by the new RAS mutation status. RESULTS The OncoMap detected 57 additional mutations (25.1%): 25 (11%) in KRAS exon 2 and 32 (14.1%) beyond KRAS exon 2. Survival differences were observed after dividing patients into the wild-type RAS group (n=170) and mutant RAS group (n=57) using OncoMap. Progression-free survival was 4.8 months versus 1.8 months (hazard ratio [HR], 0.44; 95% confidence interval [CI], 0.32 to 0.61), and overall survival was 11.9 months versus 8.4 months (HR, 0.65; 95% CI, 0.47 to 0.88). CONCLUSION Sanger sequencing is not sufficient for selecting candidates for cetuximab treatment. High-throughput extended RAS genotyping is a feasible approach for this purpose and identifies patients who might benefit from cetuximab treatment.
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Affiliation(s)
- Dalyong Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Yong Sang Hong
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jeong Eun Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Kyu-Pyo Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jae-Lyun Lee
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Sung-Min Chun
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jihun Kim
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Se Jin Jang
- Department of Pathology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Tae Won Kim
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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12
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Zhang N, Liu H, Yue G, Zhang Y, You J, Wang H. Molecular Heterogeneity of Ewing Sarcoma as Detected by Ion Torrent Sequencing. PLoS One 2016; 11:e0153546. [PMID: 27077911 PMCID: PMC4831808 DOI: 10.1371/journal.pone.0153546] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 03/31/2016] [Indexed: 12/26/2022] Open
Abstract
Ewing sarcoma (ES) is the second most common malignant bone and soft tissue tumor in children and adolescents. Despite advances in comprehensive treatment, patients with ES metastases still suffer poor outcomes, thus, emphasizing the need for detailed genetic profiles of ES patients to identify suitable molecular biomarkers for improved prognosis and development of effective and targeted therapies. In this study, the next generation sequencing Ion AmpliSeq™ Cancer Hotspot Panel v2 was used to identify cancer-related gene mutations in the tissue samples from 20 ES patients. This platform targeted 207 amplicons of 2800 loci in 50 cancer-related genes. Among the 20 tissue specimens, 62 nonsynonymous hotspot mutations were identified in 26 cancer-related genes, revealing the molecular heterogeneity of ES. Among these, five novel mutations in cancer-related genes (KDR, STK11, MLH1, KRAS, and PTPN11) were detected in ES, and these mutations were confirmed with traditional Sanger sequencing. ES patients with KDR, STK11, and MLH1 mutations had higher Ki-67 proliferation indices than the ES patients lacking such mutations. Notably, more than half of the ES patients harbored one or two possible ‘druggable’ mutations that have been previously linked to a clinical cancer treatment option. Our results provided the foundation to not only elucidate possible mechanisms involved in ES pathogenesis but also indicated the utility of Ion Torrent sequencing as a sensitive and cost-effective tool to screen key oncogenes and tumor suppressors in order to develop personalized therapy for ES patients.
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Affiliation(s)
- Nana Zhang
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China.,Department of Pathology, Peking University Third Hospital, Beijing, China
| | - Haijing Liu
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China.,Department of Pathology, Peking University Third Hospital, Beijing, China
| | - Guanjun Yue
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China.,Department of Pathology, Peking University Third Hospital, Beijing, China
| | - Yan Zhang
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China.,Department of Pathology, Peking University Third Hospital, Beijing, China
| | - Jiangfeng You
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China.,Department of Pathology, Peking University Third Hospital, Beijing, China
| | - Hua Wang
- Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China.,Department of Pathology, Peking University Third Hospital, Beijing, China
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13
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Pitt SC, Hernandez RA, Nehs MA, Gawande AA, Moore FD, Ruan DT, Cho NL. Identification of Novel Oncogenic Mutations in Thyroid Cancer. J Am Coll Surg 2016; 222:1036-1043.e2. [PMID: 27010584 DOI: 10.1016/j.jamcollsurg.2015.12.047] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 11/29/2015] [Accepted: 12/21/2015] [Indexed: 02/02/2023]
Abstract
BACKGROUND Thyroid cancer patients frequently have favorable outcomes. However, a small subset develops aggressive disease refractory to traditional treatments. Therefore, we sought to characterize oncogenic mutations in thyroid cancers to identify novel therapeutic targets that may benefit patients with advanced, refractory disease. STUDY DESIGN Data on 239 thyroid cancer specimens collected between January 2009 and September 2014 were obtained from the Dana Farber/Brigham and Women's Cancer Center. The tumors were analyzed with the OncoMap-4 or OncoPanel high-throughput genotyping platforms that survey up to 275 cancer genes and 91 introns for DNA rearrangement. RESULTS Of the 239 thyroid cancer specimens, 128 (54%) had oncogenic mutations detected. These 128 tumors had 351 different mutations detected in 129 oncogenes or tumor suppressors. Examination of the 128 specimens demonstrated that 55% (n = 70) had 1 oncogenic mutation, and 45% (n = 48) had more than 1 mutation. The 351 oncogenic mutations were in papillary (85%), follicular (4%), medullary (7%), and anaplastic (4%) thyroid cancers. Analysis revealed that 2.3% (n = 3 genes) of the somatic gene mutations were novel. These included AR (n = 1), MPL (n = 2), and EXT2 (n = 1), which were present in 4 different papillary thyroid cancer specimens. New mutations were found in an additional 13 genes known to have altered protein expression in thyroid cancer: BLM, CBL, CIITA, EP300, GSTM5, LMO2, PRAME, SBDS, SF1, TET2, TNFAIP3, XPO1, and ZRSR2. CONCLUSIONS This analysis revealed that several previously unreported oncogenic gene mutations exist in thyroid cancers and may be targets for the development of future therapies. Further investigation into the role of these genes is warranted.
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Affiliation(s)
- Susan C Pitt
- Department of Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI.
| | - Roland A Hernandez
- Department of Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Matthew A Nehs
- Department of Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Atul A Gawande
- Department of Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Francis D Moore
- Department of Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Daniel T Ruan
- Department of Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
| | - Nancy L Cho
- Department of Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
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14
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Lee SH, Hong JH, Park HK, Park JS, Kim BK, Lee JY, Jeong JY, Yoon GS, Inoue M, Choi GS, Lee IK. Colorectal cancer-derived tumor spheroids retain the characteristics of original tumors. Cancer Lett 2015; 367:34-42. [PMID: 26185002 DOI: 10.1016/j.canlet.2015.06.024] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 06/25/2015] [Accepted: 06/25/2015] [Indexed: 02/07/2023]
Abstract
Primary cultures of cancer cells are useful for developing personalized medicine. In this study, we characterized three lines of three-dimensional (3D) tumor spheroids established directly from tumor tissues of patients with colorectal cancers (CRCs). Each line mainly included EpCAM-positive cells and cells expressing putative cancer stem cell markers such as CD133, CD44, CD24, ALDH1, and LGR5. These characteristic stem cell markers remained identically for months in vitro. Short tandem repeat genotyping suggested that genetic fingerprints of these tumor spheroids were similar to those of the original tumor tissues from which they were derived. Mutational analysis showed that each line had the same mutation profile for APC, KRAS, MLH1, serine-threonine kinase 11, and TP53 as its parental tumor tissue. One line harboring an activating KRAS mutation was resistant to cetuximab while the remaining two lines harboring wild-type KRAS showed different responses to cetuximab. Immunohistochemical analysis showed that xenograft tumors derived from these lines retained the histopathological and mutational patterns of their parental tumors. Collectively, these results clearly showed that 3D tumor spheroids directly generated from tumor tissues of patients with CRCs preserved the characteristics of their parental tumor tissues and could be used for developing personalized medicines for CRCs.
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Affiliation(s)
- Sun-Hwa Lee
- New Drug Development Center, Daegu-Gyungbuk Medical Innovation Foundation, Daegu, Republic of Korea
| | - Jun Hwa Hong
- Leading-Edge Research Center for Drug Discovery and Development for Diabetes and Metabolic Disease, Kyungpook National University Medical Center, Daegu, Republic of Korea; Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Hwan Ki Park
- Leading-Edge Research Center for Drug Discovery and Development for Diabetes and Metabolic Disease, Kyungpook National University Medical Center, Daegu, Republic of Korea
| | - Jun Seok Park
- Colorectal Cancer Center, Kyungpook National University Medical Center, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Bo-Kyung Kim
- Leading-Edge Research Center for Drug Discovery and Development for Diabetes and Metabolic Disease, Kyungpook National University Medical Center, Daegu, Republic of Korea
| | - Jung-Yi Lee
- Leading-Edge Research Center for Drug Discovery and Development for Diabetes and Metabolic Disease, Kyungpook National University Medical Center, Daegu, Republic of Korea
| | - Ji Yun Jeong
- Department of Pathology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Ghil Suk Yoon
- Department of Pathology, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
| | - Masahiro Inoue
- Department of Biochemistry, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan
| | - Gyu-Seog Choi
- Colorectal Cancer Center, Kyungpook National University Medical Center, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
| | - In-Kyu Lee
- Leading-Edge Research Center for Drug Discovery and Development for Diabetes and Metabolic Disease, Kyungpook National University Medical Center, Daegu, Republic of Korea; Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu, Republic of Korea.
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