1
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Wang Z, Xie W, Guan H. The diagnostic, prognostic role and molecular mechanism of miR-328 in human cancer. Biomed Pharmacother 2023; 157:114031. [PMID: 36413837 DOI: 10.1016/j.biopha.2022.114031] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [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: 10/01/2022] [Revised: 11/06/2022] [Accepted: 11/17/2022] [Indexed: 11/20/2022] Open
Abstract
MicroRNA are non-coding small RNAs that bind to their target mRNA and cause mRNA degradation or translation inhibition. MiRNA dysregulation is linked to a variety of human cancers and has a role in the genesis and development of cancer pathology. MiR-328 has been reported to be involved in various human cancers. And miR-328 is considered a key regulator in human cancer. It participates in biological processes such as proliferation, apoptosis, invasion, migration, and EMT. The present review will combine the basic and clinical studies to find that miR-328 promotes tumorigenesis and metastasis in human cancer. And we will describe the diagnostic, prognostic, and therapeutic value of miR-328 in various human cancers.
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Affiliation(s)
- Zhichao Wang
- Department of Clinical Laboratory, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China.
| | - Wenjie Xie
- Department of Clinical Laboratory, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China.
| | - Hongzai Guan
- Department of Clinical Laboratory, The Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao 266003, China.
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2
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Lan X, Bao H, Ge X, Cao J, Fan X, Zhang Q, Liu K, Zhang X, Tan Z, Zheng C, Wang A, Chen C, Zhu X, Wang J, Xu J, Zhu X, Wu X, Wang X, Shao Y, Ge M. Genomic landscape of metastatic papillary thyroid carcinoma and novel biomarkers for predicting distant metastasis. Cancer Sci 2020; 111:2163-2173. [PMID: 32187423 PMCID: PMC7293069 DOI: 10.1111/cas.14389] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [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: 09/26/2019] [Revised: 02/28/2020] [Accepted: 03/01/2020] [Indexed: 12/19/2022] Open
Abstract
Papillary thyroid carcinoma (PTC) is the most common malignancy of the thyroid gland, with a relatively high cure rate. Distant metastasis (DM) of PTC is uncommon, but when it occurs, it significantly decreases the survival of PTC patients. The molecular mechanisms of DM in PTC have not been systematically studied. We performed whole exome sequencing and GeneseeqPrime (425 genes) panel sequencing of the primary tumor, plasma and matched white blood cell samples from 20 PTC with DM and 46 PTC without DM. We identified somatic mutations, gene fusions and copy number alterations and analyzed their relationships with DM of PTC. BRAF‐V600E was identified in 73% of PTC, followed by RET fusions (14%) in a mutually exclusive manner (P < 0.0001). We found that gene fusions (RET, ALK or NTRK1) (P < 0.01) and chromosome 22q loss (P < 0.01) were independently associated with DM in both univariate and multivariate analyses. A nomogram model consisting of chromosome 22q loss, gene fusions and three clinical variables was built for predicting DM in PTC (C‐index = 0.89). The plasma circulating tumor DNA (ctDNA) detection rate in PTC was only 38.9%; however, it was significantly associated with the metastatic status (P = 0.04), tumor size (P = 0.001) and invasiveness (P = 0.01). In conclusion, gene fusions and chromosome 22q loss were independently associated with DM in PTC and could serve as molecular biomarkers for predicting DM. The ctDNA detection rate was low in non–DM PTC but significantly higher in PTC with DM.
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Affiliation(s)
- Xiabin Lan
- Department of Head and Neck Surgery, Cancer Hospital of the University of Chinese Academy of Sciences, Zhejiang Cancer Hospital, Hangzhou, China.,Key Laboratory of Head & Neck Cancer Translational Research of Zhejiang Province, Institute of Cancer and Basic Medicine, Chinese Academy of Sciences, Hangzhou, China
| | - Hua Bao
- Translational Medicine Research Institute, Geneseeq Technology, Toronto, ON, Canada
| | - Xinyang Ge
- Key Laboratory of Head & Neck Cancer Translational Research of Zhejiang Province, Institute of Cancer and Basic Medicine, Chinese Academy of Sciences, Hangzhou, China.,Heartland Christian School, Columbiana, OH, USA
| | - Jun Cao
- Key Laboratory of Head & Neck Cancer Translational Research of Zhejiang Province, Institute of Cancer and Basic Medicine, Chinese Academy of Sciences, Hangzhou, China
| | - Xiaojun Fan
- Translational Medicine Research Institute, Geneseeq Technology, Toronto, ON, Canada
| | - Qihong Zhang
- Zhejiang Chinese Medical University, Hangzhou, China
| | - Kaihua Liu
- Nanjing Geneseeq Technology Inc., Nanjing, China
| | - Xian Zhang
- Nanjing Geneseeq Technology Inc., Nanjing, China
| | - Zhuo Tan
- Department of Head and Neck Surgery, Cancer Hospital of the University of Chinese Academy of Sciences, Zhejiang Cancer Hospital, Hangzhou, China.,Key Laboratory of Head & Neck Cancer Translational Research of Zhejiang Province, Institute of Cancer and Basic Medicine, Chinese Academy of Sciences, Hangzhou, China
| | - Chuanming Zheng
- Department of Head, Neck and Thyroid Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China
| | - Ao Wang
- Translational Medicine Research Institute, Geneseeq Technology, Toronto, ON, Canada
| | - Chao Chen
- Department of Head and Neck Surgery, Cancer Hospital of the University of Chinese Academy of Sciences, Zhejiang Cancer Hospital, Hangzhou, China.,Key Laboratory of Head & Neck Cancer Translational Research of Zhejiang Province, Institute of Cancer and Basic Medicine, Chinese Academy of Sciences, Hangzhou, China
| | - Xin Zhu
- Key Laboratory of Head & Neck Cancer Translational Research of Zhejiang Province, Institute of Cancer and Basic Medicine, Chinese Academy of Sciences, Hangzhou, China
| | - Jiafeng Wang
- Department of Head and Neck Surgery, Cancer Hospital of the University of Chinese Academy of Sciences, Zhejiang Cancer Hospital, Hangzhou, China.,Key Laboratory of Head & Neck Cancer Translational Research of Zhejiang Province, Institute of Cancer and Basic Medicine, Chinese Academy of Sciences, Hangzhou, China
| | - Jiajie Xu
- Department of Head, Neck and Thyroid Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China
| | - Xuhang Zhu
- Department of Head and Neck Surgery, Cancer Hospital of the University of Chinese Academy of Sciences, Zhejiang Cancer Hospital, Hangzhou, China.,Key Laboratory of Head & Neck Cancer Translational Research of Zhejiang Province, Institute of Cancer and Basic Medicine, Chinese Academy of Sciences, Hangzhou, China
| | - Xue Wu
- Translational Medicine Research Institute, Geneseeq Technology, Toronto, ON, Canada
| | - Xiaonan Wang
- Nanjing Geneseeq Technology Inc., Nanjing, China
| | - Yang Shao
- Nanjing Geneseeq Technology Inc., Nanjing, China.,School of Public Health, Nanjing Medical University, Nanjing, China
| | - Minghua Ge
- Department of Head, Neck and Thyroid Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, China
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3
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Giesing M, Austrup F, Böckmann B, Driesel G, Eder C, Kusiak I, Suchy B, Uciechowski P, Grill HJ. Independent Prognostication and Therapy Monitoring of Breast Cancer Patients by Dna/Rna Typing of Minimal Residual Cancer Cells. Int J Biol Markers 2018; 15:94-9. [PMID: 10763149 DOI: 10.1177/172460080001500118] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [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: 11/17/2022]
Abstract
Clinical relevance, purification techniques and molecular characterization of minimal residual cancer cells (MRCC) is a controversial topic in the literature. An analytical concept including a novel isolation procedure and a panel of tests for DNA and RNA typing of MRCCs is described and clinically evaluated in this paper. The purification procedure exploiting the physical characteristics of MRCCs shows superior performance leading to >50% pure and viable tumor cells. Proof of the presence and purity of MRCCs in an isolated sample is given by multiparametric DNA typing (amplifications, mutations, losses of heterozygosity). On the basis of the proven presence of MRCCs tumor-relevant mRNAs can be adequately analyzed by normalized quantitative real-time RT-PCR. The molecular characterization of MRCCs isolated from blood of breast cancer patients could have a strong clinical impact on prognostication, drug targeting and therapy monitoring.
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Affiliation(s)
- M Giesing
- Institute for Molecular NanoTechnology, Recklinghausen, Germany
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4
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Kluth M, Graunke M, Möller-Koop C, Hube-Magg C, Minner S, Michl U, Graefen M, Huland H, Pompe R, Jacobsen F, Hinsch A, Wittmer C, Lebok P, Steurer S, Büscheck F, Clauditz T, Wilczak W, Sauter G, Schlomm T, Simon R. Deletion of 18q is a strong and independent prognostic feature in prostate cancer. Oncotarget 2018; 7:86339-86349. [PMID: 27861151 PMCID: PMC5349918 DOI: 10.18632/oncotarget.13404] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [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: 09/27/2016] [Accepted: 11/02/2016] [Indexed: 11/25/2022] Open
Abstract
Deletion of 18q recurrently occurs in prostate cancer. To evaluate its clinical relevance, dual labeling fluorescence in-situ hybridization (FISH) using probes for 18q21 and centromere 18 was performed on a prostate cancer tissue microarray (TMA). An 18q deletion was found in 517 of 6,881 successfully analyzed cancers (7.5%). 18q deletion was linked to unfavorable tumor phenotype. An 18q deletion was seen in 6.4% of 4,360 pT2, 8.0% of 1,559 pT3a and 11.8% of 930 pT3b-pT4 cancers (P < 0.0001). Deletions of 18q were detected in 6.9% of 1,636 Gleason ≤ 3 + 3, 6.8% of 3,804 Gleason 3 + 4, 10.1% of 1,058 Gleason 4+3, and 9.9% of 344 Gleason ≥ 4 + 4 tumors (P = 0.0013). Deletions of 18q were slightly more frequent in ERG-fusion negative (8.2%) than in ERG-fusion positive cancers (6.4%, P = 0.0063). 18q deletions were also linked to biochemical recurrence (BCR, P < 0.0001). This was independent from established pre- and postoperative prognostic factors (P ≤ 0.0004). In summary, the results of our study identify 18q deletion as an independent prognostic parameter in prostate cancer. As it is easy to measure, 18q deletion may be a suitable component for multiparametric molecular prostate cancer prognosis tests.
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Affiliation(s)
- Martina Kluth
- Institute of Pathology, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Maximilian Graunke
- Institute of Pathology, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Christina Möller-Koop
- Institute of Pathology, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Claudia Hube-Magg
- Institute of Pathology, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Sarah Minner
- Institute of Pathology, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Uwe Michl
- Martini-Clinic, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Markus Graefen
- Martini-Clinic, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Hartwig Huland
- Martini-Clinic, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Raisa Pompe
- Martini-Clinic, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Frank Jacobsen
- Institute of Pathology, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Andrea Hinsch
- Institute of Pathology, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Corinna Wittmer
- Institute of Pathology, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Patrick Lebok
- Institute of Pathology, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Stefan Steurer
- Institute of Pathology, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Franziska Büscheck
- Institute of Pathology, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Till Clauditz
- Institute of Pathology, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Waldemar Wilczak
- Institute of Pathology, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Guido Sauter
- Institute of Pathology, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
| | - Thorsten Schlomm
- Martini-Clinic, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany.,Department of Urology, Section for prostate cancer research, University Medical Center Hamburg-Eppendorf, Germany
| | - Ronald Simon
- Institute of Pathology, Prostate Cancer Center at University Medical Center Hamburg-Eppendorf, Germany
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5
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Glover M, Soni S, Ren Q, Maclennan GT, Fu P, Gupta S. Influence of chronic inflammation on Bcl-2 and PCNA expression in prostate needle biopsy specimens. Oncol Lett 2017; 14:3927-3934. [PMID: 28943900 PMCID: PMC5604163 DOI: 10.3892/ol.2017.6668] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [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: 12/28/2016] [Accepted: 03/17/2017] [Indexed: 01/08/2023] Open
Abstract
The association between inflammation and cancer has been established in certain forms of human malignancies; however, its role in prostate cancer remains unclear. The present study investigates a possible association between chronic inflammation and the development of epithelial neoplasia in the prostate. Needle biopsy specimens were obtained from patients with serum prostate-specific antigen levels >4 ng/ml, evaluated for morphological findings, and immunostained for Bcl-2 and proliferating cell nuclear antigen (PCNA). Bcl-2 is a survival protein that appears to lie at a nodal point in pathways involved in cell survival, carcinogenesis, and development of therapeutic resistance in certain cancer types. Similarly, PCNA is a critical protein for DNA replication, repair of DNA damage, chromatin structure maintenance, chromosome segregation and cell-cycle progression. The association between these two proteins was examined in prostate tissues with and without chronic inflammation, as well as tissues with and without evidence of neoplastic changes. Of the 106 needle biopsies examined, 18% exhibited atrophy with inflammation. Proliferative inflammatory atrophy/post-atrophic hyperplasia were observed in 42%, high-grade prostatic intraepithelial neoplasia (HGPIN) in 8%, prostatic adenocarcinoma in 11%, and 2% had atypical acinar proliferation suspicious for malignancy. A total of 36 specimens were stained for Bcl-2 and PCNA. Bcl-2 was expressed widely in inflammatory and epithelial tissue; however, more intense expression was observed in the areas of chronic inflammation, predominantly in infiltrating immune cells. The highest proliferation index was observed in the epithelia of HGPIN and cancer. An inverse correlation between the expression of Bcl-2 and the expression of PCNA was observed in the epithelium. The areas of chronic inflammation were associated with increased Bcl-2 expression, whereas the highly proliferative epithelium minimally expressed Bcl-2. These results suggest that Bcl-2 alters the phenotype of particular epithelial cells with a gain in neoplastic characteristics, leading to a likely precursor that may later progress into HGPIN and cancer.
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Affiliation(s)
- Michael Glover
- Department of Urology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Shardul Soni
- Department of Urology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Qinghu Ren
- Department of Pathology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Gregory T Maclennan
- Department of Pathology, Case Western Reserve University, Cleveland, OH 44106, USA.,Division of General Medical Sciences, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Pingfu Fu
- Division of General Medical Sciences, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH 44106, USA.,Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Sanjay Gupta
- Department of Urology, Case Western Reserve University, Cleveland, OH 44106, USA.,Division of General Medical Sciences, Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH 44106, USA.,The Urology Institute, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA.,Department of Urology, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH 44106, USA
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6
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Abril J, de Heredia ML, González L, Clèries R, Nadal M, Condom E, Aguiló F, Gómez-Zaera M, Nunes V. Altered expression of 12S/MT-RNR1, MT-CO2/COX2, and MT-ATP6 mitochondrial genes in prostate cancer. Prostate 2008; 68:1086-96. [PMID: 18409190 DOI: 10.1002/pros.20771] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND Prostate cancer is one of the commonest cancers worldwide and is responsible for nearly 6% of all male cancer deaths. Despite this relevance, the mechanisms involved in the development and progression of this malignancy remain unknown. The involvement of polypeptides of the mitochondrial respiratory chain, the Krebs cycle and the glutathione antioxidant system in this type of cancer has been previously described, although no publication has focused on the expression of mitochondrial genes in the prostate of PCa patients. METHODS We have determined by reverse transcription-quantitative PCR (RT-qPCR) the relative amount of the transcripts of eight mitochondrial genes (MT-ND2, MT-ND4, MT-ND6, MT-CYB, 12S/MT-RNR1, 16S/MT-RNR2, MT-CO2/COX2, MT-ATP6), and four nuclear genes (COX11, GSR, CS, ACO2), all of them key players in the normal metabolism of mitochondria. Additionally we analyzed the expression of Cyclophilin A (PPIA). RESULTS We observed differential expression of mitochondrial 12S/MT-RNR1, MT-CO2/COX2, and MT-ATP6 transcripts in tumor samples when compared to their paired normal samples. CONCLUSIONS The amount of mitochondrial 12S/MT-RNR1, MT-CO2/COX2, and MT-ATP6 transcripts is significantly decreased in tumor samples when compared to their paired normal sample, suggesting that mitochondrial gene expression is altered in PCa.
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Affiliation(s)
- Jesús Abril
- Centre de Genètica Mèdica i Molecular-IDIBELL, Hospital Duran i Reynals, L'Hospitalet de Llobregat, Barcelona, Spain
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7
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Chaudhary J, Schmidt M. The impact of genomic alterations on the transcriptome: a prostate cancer cell line case study. Chromosome Res 2006; 14:567-86. [PMID: 16823619 DOI: 10.1007/s10577-006-1055-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2006] [Revised: 03/24/2006] [Accepted: 03/24/2006] [Indexed: 12/13/2022]
Abstract
Genetic instability may lead to the loss/gain of transcriptional control. Here we investigated the effect of genomic instability, that is loss/gain of chromosomal regions on the global transcriptome of prostate cancer cell line DU145. The genomic loss/gain map obtained through BAC array-based CGH was superimposed on the dynamic transcriptome of DU145 cells treated with serum for 0 h (serum starved), 2 h and 12 h. The genomic analysis suggested that in DU145 cells: (1) chromosomal gains are prominent than losses and (2) copy number changes are associated with chromosome-specific and dynamic gene expression regulatory mechanisms. A significant proportion of the genes in the stable regions of the chromosome were up-regulated whereas a higher proportion of genes were down-regulated at 2 and 12 h in the deleted regions of the chromosomes following serum treatment. No change in expression was observed for the genes in the gained regions over a period of time. This analysis led us to propose that loss of heterozygosity leads to an overall transcriptional down-regulation that may further lead to a decrease in the expression of putative tumor suppressors. The genomic profile of DU145 is similar to pathological specimens of prostate cancer, hence the genomic/transcriptomic signature of DU145 can be used to understand the pathology of prostate cancer. It is expected that this analysis will allow a better understanding of transcriptional regulatory mechanisms in the context of genomic loss and gain and may lead to the discovery of novel oncogenes and tumor suppressors and the underlying regulatory pathways.
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MESH Headings
- Cell Line, Tumor
- Chromosomal Instability/genetics
- Chromosomes, Human, Pair 1
- Chromosomes, Human, Pair 14
- Chromosomes, Human, Pair 18
- Chromosomes, Human, Pair 5
- Chromosomes, Human, Pair 8
- Gene Expression Regulation
- Genomic Instability/genetics
- Humans
- Loss of Heterozygosity
- Male
- Oligonucleotide Array Sequence Analysis
- Prostatic Neoplasms/genetics
- Transcription, Genetic/genetics
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Affiliation(s)
- J Chaudhary
- 4029D RCST, Department of Biological Sciences, Center for Cancer Research and Therapeutics Development, Clark Atlanta University, Atlanta, GA 30314, USA.
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8
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Jiao YF, Sugai T, Habano W, Uesugi N, Takagane A, Nakamura SI. Clinicopathological significance of loss of heterozygosity in intestinal- and solid-type gastric carcinomas: a comprehensive study using the crypt isolation technique. Mod Pathol 2006; 19:548-55. [PMID: 16474377 DOI: 10.1038/modpathol.3800561] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The clinicopathological significance of loss of heterozygosity (LOH) in gastric carcinoma remains poorly understood. We and other researchers have previously demonstrated that LOH is fairly common in intestinal- and solid-type gastric carcinomas, but rare in diffuse-type tumors. In this study, we investigated the relationship between clinicopathological variables and LOH status in intestinal- and solid-type gastric carcinomas. The crypt isolation technique was utilized to analyze LOH at 1p36, 3p14, 4p15, 5q21-22, 8p11-12, 9p21, 13q22, 17p13.1 18q21 and 22q13.31 in 113 intestinal- and solid-type gastric carcinomas using a polymerase chain reaction assay. Immunostaining with D2-40 and Elastica van Gieson staining were used to detect lymphatic invasion and vessel invasion, respectively. High LOH rates (49-71%) were observed in all chromosomal regions tested. 1p36 loss was significantly associated with advanced tumors and lymph node metastasis. 8p11-12 loss was significantly associated with lymph node metastasis, lymphatic invasion, and vessel invasion. 17p13.1 (TP53) loss was significantly associated with vessel invasion. 22q13.31 loss was significantly associated with advanced tumors, lymph node metastasis, lymphatic invasion, vessel invasion and late TNM stage. No significant associations were observed between LOH at other chromosomal regions and aggressive behaviors. In addition, significantly higher LOH rates at 1p36, 9p21, 18q21 and 22q13.31 were observed in cardiac tumors compared with noncardiac tumors. These results suggest that in intestinal- and solid-type gastric carcinomas, LOH on 3p14, 4p15, 5q21-22, 9p21, 13q22 and 18q21 is associated with carcinogenesis, while LOH on 1p36, 8p11-12, 17p31.1 and 22q13.31 is associated with tumor progression.
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Affiliation(s)
- Yu-Fei Jiao
- Division of Pathology, Central Clinical Laboratory, School of Medicine, Iwate Medical University, Uchimaru, Morioka, Japan
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9
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Adams J, Cuthbert-Heavens D, Bass S, Knowles MA. Infrequent mutation of TRAIL receptor 2 (TRAIL-R2/DR5) in transitional cell carcinoma of the bladder with 8p21 loss of heterozygosity. Cancer Lett 2005; 220:137-44. [PMID: 15766588 DOI: 10.1016/j.canlet.2004.06.052] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [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: 03/29/2004] [Revised: 06/28/2004] [Accepted: 06/30/2004] [Indexed: 10/26/2022]
Abstract
Loss of heterozygosity (LOH) on 8p is a frequent event in many cancers and is often associated with more aggressive disease. Tumour necrosis factor-related apoptosis inducing ligand (TRAIL) receptor 2 (TRAIL-R2) also known as TNFRSF10B (tumour necrosis factor receptor (TNFR) super family 10b) or KILLER/DR5, a member of the TNFR family, is a promising candidate tumour suppressor gene at 8p21-22. Mutations in this gene have been identified in non-small cell lung cancer, head and neck cancer, breast cancer and non-Hodgkin's lymphoma. We carried out mutation analysis of TRAIL-R2 in bladder cancer cell lines and in primary bladder tumours. One novel protein truncating mutation was identified in a bladder cancer cell line. Our results suggest that if TRAIL-R2 is the target of LOH events in these cancers, inactivation of the remaining allele is by a mechanism other than mutation.
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Affiliation(s)
- Jacqui Adams
- Cancer Research UK Clinical Centre, St James's University Hospital, Beckett Street, Leeds LS9 7TF, UK
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10
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Adams J, Williams SV, Aveyard JS, Knowles MA. Loss of Heterozygosity Analysis and DNA Copy Number Measurement on 8p in Bladder Cancer Reveals Two Mechanisms of Allelic Loss. Cancer Res 2005. [DOI: 10.1158/0008-5472.66.65.1] [Citation(s) in RCA: 3] [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
Many epithelial tumors show deletion of the short arm of chromosome 8 that is related to aggressive disease or adverse prognosis. In undissected samples of urothelial cell carcinoma of the bladder, at least two regions of loss of heterozygosity (LOH) were identified previously within a small region of 8p11-p12. LOH analysis on a panel of pure tumor DNA samples confirmed this and identified tumors with allelic imbalance, some with clear breakpoints in 8p12. This suggests either that these samples contained genetically distinct subclones or that breakpoints in 8p12 may confer a selective advantage without LOH. To assess the mechanism of LOH and to map breakpoints precisely, a panel of bladder cancer cell lines was examined. Microsatellite analysis of 8p markers identified regions of contiguous homozygosity that coincided with regions of LOH in tumors. Fluorescence in situ hybridization analysis was carried out on seven cell lines predicted to have 8p LOH using a chromosome 8 paint, a chromosome 8 centromeric probe, and a series of single-copy genomic probes. This revealed overall underrepresentation of 8p and overrepresentation of 8q. Several breakpoints and one interstitial deletion were identified in 8p12. Two cell lines with extensive interstitial regions of homozygosity showed no reduction in DNA copy number by fluorescence in situ hybridization analysis, indicating that, in addition to large deletions and rearrangements of 8p, small regions of interstitial LOH on 8p12 may be generated by mitotic recombination. This implicates both major DNA double-strand break repair mechanisms in the generation of 8p alterations.
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Affiliation(s)
- Jacqui Adams
- Cancer Research UK Clinical Centre, St. James' University Hospital, Leeds, United Kingdom
| | - Sarah V. Williams
- Cancer Research UK Clinical Centre, St. James' University Hospital, Leeds, United Kingdom
| | - Joanne S. Aveyard
- Cancer Research UK Clinical Centre, St. James' University Hospital, Leeds, United Kingdom
| | - Margaret A. Knowles
- Cancer Research UK Clinical Centre, St. James' University Hospital, Leeds, United Kingdom
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11
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von Knobloch R, Konrad L, Barth PJ, Brandt H, Wille S, Heidenreich A, Moll R, Hofmann R. Genetic pathways and new progression markers for prostate cancer suggested by microsatellite allelotyping. Clin Cancer Res 2004; 10:1064-73. [PMID: 14871986 DOI: 10.1158/1078-0432.ccr-03-0070] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE At diagnosis, the biological behavior of prostate cancer is uncertain, making the choice of an adequate therapy option difficult. Performing microsatellite allelotyping on a large series of consecutive prostate cancers procured during radical prostatectomy at our institution, we sought to identify molecular markers associated with disease progression. EXPERIMENTAL DESIGN A total of 156 consecutive fresh tumor samples was prospectively collected and macroscopically dissected from the whole prostatectomy specimen immediately after operation. Histologically 100 samples contained >75% tumor cells and were therefore enrolled in the microsatellite allelotyping, using a total of 24 polymorphic markers for the chromosomal regions 5p, 5q, 7q, 8p, 9p, 9q, 13q, 17p, 17q, and 18q. Fresh paired normal and tumor DNA was investigated in fluorescent microsatellite analysis with automated laser product detection. RESULTS The incidence of tumor-DNA alterations [loss of heterozygosity or allelic imbalance (AI)] was highest for chromosomal regions 13q and 8p with 72 and 71%, respectively, followed by chromosomes 7q, 18q, 5q, and 17p with 57, 53, 41, and 39%, respectively. Alterations at chromosomes 8p, 9p, 13q, and 17p were significantly (P < 0.05) associated with advanced tumor stage, whereas AI at 8p and 17p was also associated with high Gleason score (P < 0.05). AI at 5q and 9p was associated with regional lymph node metastasis (P < 0.05). The combination of AI at 8p and 13q was strongly associated with advanced tumor stage (P < 0.0001). CONCLUSIONS With the obtained results, we are able to postulate three distinct pathways in prostate carcinogenesis, and we identified microsatellite markers of prognostic value.
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Affiliation(s)
- Rolf von Knobloch
- Department of Urology, Philipps-University Marburg Medical School, Baldingerstrasse, D-35043 Marburg/Lahn, Germany.
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12
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Zhou W, Goodman M, Lyles RH, Lim SD, Williams TY, Rusthoven KE, Mandel JS, Amin MB, Petros JA. Surgical margin and Gleason score as predictors of postoperative recurrence in prostate cancer with or without chromosome 8p allelic imbalance. Prostate 2004; 61:81-91. [PMID: 15287096 DOI: 10.1002/pros.20086] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
BACKGROUND Identification of prostate cancer patients at risk for postoperative disease recurrence is an important clinical issue. Existing pathological markers can predict disease recurrence only to a certain extent, and there is a need for more accurate predictors. METHODS Using "counting alleles," a novel experimental method, we determined allelic status of chromosome 8p in 107 prostatectomy specimens. Statistical analyses examined the association between pathologic predictors (Gleason score, stage, surgical margin, etc.) and cancer recurrence in patients with and without 8p allelic imbalance (8p AI). RESULTS 8p AI cancers were more likely to recur in the presence of a positive surgical margin, whereas recurrence of 8p retaining tumors was associated with the Gleason score, but not with the surgical margin. CONCLUSIONS Our findings suggest that chromosome 8p allelic status affects the predictive value of "traditional" markers of prostate cancer recurrence. If confirmed by larger studies, these results may have important clinical implications.
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MESH Headings
- Age Factors
- Aged
- Aged, 80 and over
- Allelic Imbalance
- Biomarkers, Tumor
- Chromosomes, Human, Pair 18/genetics
- Chromosomes, Human, Pair 8/genetics
- DNA, Neoplasm/chemistry
- DNA, Neoplasm/genetics
- Humans
- Male
- Middle Aged
- Neoplasm Recurrence, Local/genetics
- Neoplasm Recurrence, Local/pathology
- Polymerase Chain Reaction
- Polymorphism, Single Nucleotide/genetics
- Predictive Value of Tests
- Proportional Hazards Models
- Prostatectomy
- Prostatic Neoplasms/genetics
- Prostatic Neoplasms/pathology
- Prostatic Neoplasms/surgery
- Retrospective Studies
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Affiliation(s)
- Wei Zhou
- Department of Hematology and Oncology, Winship Cancer Institute, Emory University School of Medicine, 1365 Clifton Road NE, Atlanta, GA 30322, USA.
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13
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Caldwell GM, Jones C, Gensberg K, Jan S, Hardy RG, Byrd P, Chughtai S, Wallis Y, Matthews GM, Morton DG. The Wnt antagonist sFRP1 in colorectal tumorigenesis. Cancer Res 2004; 64:883-8. [PMID: 14871816 DOI: 10.1158/0008-5472.can-03-1346] [Citation(s) in RCA: 226] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Regions of the short arm of chromosome 8 are deleted frequently in a range of solid tumors, indicating that tumor suppressor genes reside at these loci. In this study, we have examined the properties of the Wnt signaling antagonist secreted frizzled-related protein (sFRP) 1 as a candidate for this role at c8p11.2. An initial survey of 10 colorectal tumors, selected by the presence of isolated short deletions of the 8p11.2 region, identified three chain-terminating mutations, all within the first exon, which encodes the cysteine-rich domain. None of these tumors exhibited microsatellite instability, indicating intact mismatch repair gene function. The preserved sFRP1 alleles in the remaining seven tumors each contained a polymorphic three-base insertion in the signal sequence, but in a broader study, no association was found between this and the development of colorectal cancer. Epigenetic inhibition of sFRP1 transcription was investigated, and increased methylation of the promotor region was demonstrated in an additional cohort of 51 locally advanced colorectal cancers. Hypermethylation was identified in 40 of 49 (82%) cancers and in only 11 of 36 (30%) matched normal mucosal samples (P < 0.001). Semiquantitative analysis, by real-time PCR, of mRNA expression in 37 of the same cohort of 51 cancers revealed that sFRP1 mRNA expression was down-regulated in 28 (76%) cases compared with matched normal large bowel mucosa. The 3' end of the sFRP1 mRNA also was found to be alternatively spliced, compared with the prototype liver and lung forms, in the colon and a number of other tissues, yielding an extended COOH terminus, which may influence its activity in a tissue-specific manner. The inactivation and down-regulation of sFRP1 observed are consistent with it acting as a tumor suppressor gene in colorectal carcinogenesis. Because beta-catenin is constitutively active in the majority of colorectal tumors, it is unlikely that sFRP1 can act in the canonical Wnt response pathway. Therefore, we propose that the reduced activity or absence of sFRP1 allows the transduction of noncanonical Wnt signals, which contribute to tumor progression.
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Affiliation(s)
- Germaine M Caldwell
- Division of Medical Sciences, School of Medicine, The University of Birmingham, Birmingham, United Kingdom
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14
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Bostwick DG, Burke HB, Djakiew D, Euling S, Ho SM, Landolph J, Morrison H, Sonawane B, Shifflett T, Waters DJ, Timms B. Human prostate cancer risk factors. Cancer 2004; 101:2371-490. [PMID: 15495199 DOI: 10.1002/cncr.20408] [Citation(s) in RCA: 383] [Impact Index Per Article: 19.2] [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: 12/27/2022]
Abstract
Prostate cancer has the highest prevalence of any nonskin cancer in the human body, with similar likelihood of neoplastic foci found within the prostates of men around the world regardless of diet, occupation, lifestyle, or other factors. Essentially all men with circulating androgens will develop microscopic prostate cancer if they live long enough. This review is a contemporary and comprehensive, literature-based analysis of the putative risk factors for human prostate cancer, and the results were presented at a multidisciplinary consensus conference held in Crystal City, Virginia, in the fall of 2002. The objectives were to evaluate known environmental factors and mechanisms of prostatic carcinogenesis and to identify existing data gaps and future research needs. The review is divided into four sections, including 1) epidemiology (endogenous factors [family history, hormones, race, aging and oxidative stress] and exogenous factors [diet, environmental agents, occupation and other factors, including lifestyle factors]); 2) animal and cell culture models for prediction of human risk (rodent models, transgenic models, mouse reconstitution models, severe combined immunodeficiency syndrome mouse models, canine models, xenograft models, and cell culture models); 3) biomarkers in prostate cancer, most of which have been tested only as predictive factors for patient outcome after treatment rather than as risk factors; and 4) genotoxic and nongenotoxic mechanisms of carcinogenesis. The authors conclude that most of the data regarding risk relies, of necessity, on epidemiologic studies, but animal and cell culture models offer promise in confirming some important findings. The current understanding of biomarkers of disease and risk factors is limited. An understanding of the risk factors for prostate cancer has practical importance for public health research and policy, genetic and nutritional education and chemoprevention, and prevention strategies.
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15
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Padalecki SS, Weldon KS, Reveles XT, Buller CL, Grubbs B, Cui Y, Yin JJ, Hall DC, Hummer BT, Weissman BE, Dallas M, Guise TA, Leach RJ, Johnson-Pais TL. Chromosome 18 suppresses prostate cancer metastases. Urol Oncol 2003; 21:366-73. [PMID: 14670546 DOI: 10.1016/s1078-1439(03)00013-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Loss of heterozygosity and allelic imbalance data has shown that there are two distinct regions of loss on chromosome 18q associated with the progression of prostate cancer (CaP). To investigate the functional significance of chromosome 18q loci in CaP, we utilized the technique of microcell-mediated chromosome transfer to introduce an intact chromosome 18 into the human prostate cancer cell line, PC-3. Three of the resulting hybrid lines were compared to the PC-3 cells in vitro and in vivo. The hybrid cell lines, containing an intact copy of the introduced chromosome 18, exhibited a substantial reduction in anchorage-dependent and independent growth in vitro. These hybrid cell lines also made smaller tumors in nude mice following subcutaneous injection compared to PC-3 cells. Because tumor growth was not completely eliminated by introduction of chromosome 18, we assessed the ability of the hybrids to metastasize to bone after intra-cardiac inoculation in a nude mouse model. Mice inoculated with PC-3 hybrids containing intact copies of chromosome 18 had significantly fewer bone metastases and dramatically improved survival compared to PC-3 cells. In addition, the introduction of chromosome 18 significantly reduced tumor burden in extraskeletal sites. This was not because of differences in growth rates because mice bearing hybrids were monitored for metastases over twice as long as mice bearing PC-3 cells. Taken together, these data suggest that chromosome 18 has a functional role in CaP to suppress growth and metastases. Identification of the responsible gene(s) may lead to molecular targets for drug discovery.
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Affiliation(s)
- S S Padalecki
- Department of Cellular and Structural Biology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
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16
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Abstract
Prostate cancer is a common malignancy that has a heterogeneous etiology and a variable outcome. Nearly all prostatic adenocarcinoma results from androgen-dependent tumor promotion. However, the cause of prostate cancer initiation is not well understood and only a few of the target oncogenes activated during prostate cancer initiation have been identified. Prostate cancer risk is strongly influenced by family history. Several genetic loci have been found to cosegregate with prostate cancer occurrence in high-risk families. Some candidate oncogenes that map to these loci have been implicated by the identification of mutations in high-risk kindreds. However, the roles of the putative oncogene products in the biochemical pathways that mediate carcinogenesis remain obscure and their influence on cancer etiology has yet to be supported by gene targeting experiments in mice. Moreover, the genes that have been implicated in hereditary prostate cancers do not appear to be mutated in sporadic cancers. Karyotypic and loss of heterozygosity analysis of sporadic prostate cancers have identified 8p, 10q, and 17p as the loci most often disrupted. Candidate oncogenes have been identified at each of these regions. Additional genes with pathogenic significance in prostate cancer have been identified by analysis of cDNA microarrays comparing benign and malignant prostate tissue, by differential genetic analysis of benign and malignant prostatic epithelium, and by induction of experimental prostate cancer in genetically engineered mice.
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Affiliation(s)
- Edward P Gelmann
- Department of Oncology, Lombardi Cancer Center, Georgetown University School of Medicine, 3800 Reservoir Rd NW, 20007-2197, Washington, DC, USA.
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17
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Wharton SB, Wardle C, Ironside JW, Wallace WH, Royds JA, Hammond DW. Comparative genomic hybridization and pathological findings in atypical teratoid/rhabdoid tumour of the central nervous system. Neuropathol Appl Neurobiol 2003; 29:254-61. [PMID: 12787322 DOI: 10.1046/j.1365-2990.2003.00451.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The atypical teratoid/rhabdoid tumour (AT/RT) is an uncommon tumour of the central nervous system in children, characterized by the presence of a rhabdoid cell component associated with variable combinations of primitive neuroectodermal tumour, mesenchymal and epithelial differentiation. Immunohistochemistry reveals a complex pattern of antigen expression and cytogenetic studies have demonstrated losses from chromosome 22. We have performed comparative genomic hybridization (CGH) on paraffin-embedded material from three cases of AT/RT. Two cases showed losses from chromosome 22 associated with other chromosome imbalances including losses from 1p in both cases. The third case demonstrated a loss from 8p as the sole abnormality. While monosomy or deletion from chromosome 22 is a useful diagnostic marker for AT/RT, it is not present in all cases. The variation in cytogenetic patterns reported for this tumour type raises the possibility that different genetic pathways may underlie this tumour phenotype and warrants the further definition of the cytogenetic spectrum for this rare tumour.
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Affiliation(s)
- S B Wharton
- Academic Unit of Pathology, University of Sheffield, Medical School, Sheffield, UK.
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18
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Takahashi S, Suzuki S, Inaguma S, Ikeda Y, Cho YM, Hayashi N, Inoue T, Sugimura Y, Nishiyama N, Fujita T, Chao J, Ushijima T, Shirai T. Down-regulated expression of prostasin in high-grade or hormone-refractory human prostate cancers. Prostate 2003; 54:187-93. [PMID: 12518323 DOI: 10.1002/pros.10178] [Citation(s) in RCA: 41] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND We previously conducted a search for genes which are differentially expressed in hormone-refractory prostate cancers using cDNA-representational difference analysis (RDA). The prostasin gene was isolated as one showing down-regulation in hormone-refractory cancers. In the present study, linkage to the stage in prostate neoplasia was examined. METHODS Prostasin expressions in 54 prostate cancer cases were examined by mRNA in situ hybridization and immunohistochemistry as well as by northern blot analysis. RESULTS Expression levels of prostasin in hormone-refractory cancers were approximately one-sixth of those in organ-confined cancers by northern blotting. Glandular components in benign prostatic hyperplasia and high-grade prostatic intraepithelial neoplasias tended to exhibit mild to moderate and relatively strong intensities, respectively. Expression levels of both prostasin mRNA and protein were inversely correlated with histological differentiation but not associated with clinical stage of human prostate cancer. Almost all cases of metastatic and hormone-refractory cancers demonstrated down-regulation of prostasin expression. CONCLUSIONS These results suggest that prostasin cannot be regarded as a prognostic indicator for human prostate cancer although it may be a useful marker for tumor differentiation.
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Affiliation(s)
- Satoru Takahashi
- Department of Experimental Pathology and Tumor Biology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Japan.
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19
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Abstract
BACKGROUND In this study, we evaluate the pattern of allelic imbalance (AI) in both sporadic prostate cancer (SPC) and hereditary prostate cancer (HPC) at loci that frequently show allelic imbalance in sporadic prostate cancer, or are believed to have a putative role in the disease. METHODS DNA obtained from 35 sporadic tumors and 46 hereditary tumors were tested for AI, by using a panel of 35 microsatellite markers. RESULTS Chromosomal regions that display high frequencies of AI (>or=30%) in HPC include 1q, 5q, 7q, 8p, 13q, 16q, 17q, 18q, and 20q. In SPC, high frequencies of AI were found at 5q, 7q, 8p, 10q, 13q. Main differences (delta >or= 20%) in AI between HPC and SPC were at 1q, 10q, 17q, 18q, and 20q. CONCLUSION AI at the prostate cancer susceptibility loci HPC1, PCaP, and HPC20 was seen more often in HPC compared with SPC. It appears that there are marked differences in the pattern of AI between sporadic and hereditary PCa.
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Affiliation(s)
- Bas A J Verhage
- Department of Urology, University Medical Center Nijmegen, The Netherlands
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20
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Takahashi S, Suzuki S, Inaguma S, Cho YM, Ikeda Y, Hayashi N, Inoue T, Sugimura Y, Nishiyama N, Fujita T, Ushijima T, Shirai T. Down-regulation of Lsm1 is involved in human prostate cancer progression. Br J Cancer 2002; 86:940-6. [PMID: 11953827 PMCID: PMC2364150 DOI: 10.1038/sj.bjc.6600163] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2001] [Revised: 12/17/2001] [Accepted: 12/28/2001] [Indexed: 12/31/2022] Open
Abstract
Elucidation of genetic alterations is an approach to understanding the underlying molecular mechanisms of progression of human prostate cancers. We have searched for genes differentially expressed in advanced prostate cancers using cDNA-representational difference analysis, and thereby isolated the Lsm1 as one of down-regulated gene. An Lsm1 expression vector was transfected into PC3 cells, normally featuring down-regulated Lsm1, and four transfectants were established. No differences in morphology or cell proliferation were evident in comparison with parent PC3 or PC3/mock-transfectants. In contrast, significant suppression of invasive potential or metastatic ability of Lsm1 transfectants was observed in the Matrigel chemoinvasion assay and in nude mice, respectively. With human prostate cancers, almost all of informative prostatectomised cases without neoadjuvant therapy showed allelic retention in the Lsm1 region, whereas refractory cancers frequently showed allelic loss in this region. No critical gene mutations were found in open reading frame of Lsm1 in prostate cancers examined by PCR-SSCP analysis, including localised and refractory cancers. These results suggest that Lsm1 is deeply involved in prostate cancer progression through its down-regulation, independent of any gene mutation.
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Affiliation(s)
- S Takahashi
- First Department of Pathology, Nagoya City University Medical School, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan.
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21
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Takahashi S, Suzuki S, Inaguma S, Ikeda Y, Cho YM, Nishiyama N, Fujita T, Inoue T, Hioki T, Sugimura Y, Ushijima T, Shirai T. Down-regulation of human X-box binding protein 1 (hXBP-1) expression correlates with tumor progression in human prostate cancers. Prostate 2002; 50:154-61. [PMID: 11813207 DOI: 10.1002/pros.10044] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND In our previous study, the gene encoding the human X-box binding protein 1 (hXBP-1) was isolated as a down-regulated gene in advanced prostate cancers using cDNA-representational difference analysis (RDA). In the present investigation, we characterized alterations of hXBP-1 in prostate cancer specimens. METHODS Expression patterns of hXBP-1 in a series of human prostate cancers were examined by Northern blotting, mRNA in situ hybridization or immunohistochemistry. Loss of heterozygosity (LOH) analysis using microsatellite markers and gene mutation analysis in the hXBP-1 region were also performed. RESULTS Expression of hXBP-1 was localized in epithelial and adenocarcinoma cells of the prostate. An inverse correlation between hXBP-1 expression and histological differentiation was found in a series of prostate cancers without hormonal therapy. Majority of refractory cancer cases exhibited weak hXBP-1 expression. No allelic loss or gene mutations were found in the hXBP-1 region and its open reading frame, respectively, in the prostate cancer examined. CONCLUSIONS These results suggest that reduction of hXBP-1 expression may be a useful marker for prostate adenocarcinoma differentiation and progression.
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Affiliation(s)
- Satoru Takahashi
- First Department of Pathology, Nagoya City University Medical School, Mizuho-Cho, Mizuho-Ku, Nagoya, Japan.
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22
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Abstract
Inhibin and activin are members of the TGF beta superfamily of growth and differentiation factors. They were first identified as gonadal-derived regulators of pituitary FSH and were subsequently assigned multiple actions in a wide range of tissues. More recently, the inhibin alpha subunit was considered as a tumor suppressor based on functional studies employing transgenic mouse models. This review evaluates the functional and molecular evidence that the inhibin alpha subunit is a tumor suppressor in endocrine cancers. The evaluation highlights the discrepant results from the human and mouse studies, as well as the differences between endocrine tumor types. In addition, we examine the evidence that the activin-signaling pathway is tumor suppressive and identify organ-specific differences in the actions and putative roles of this pathway in endocrine tumors. In summary, there is a considerable body of evidence to support the role of inhibins and activins in endocrine-related tumors. Future studies will define the mechanisms by which inhibins and activins contribute to the process of initiation, promotion, or progression of endocrine-related cancers.
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Affiliation(s)
- G P Risbridger
- Centre for Urological Research, Institute of Reproduction and Development, Monash University, Melbourne, Victoria 3168, Australia.
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23
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Colombo P, Patriarca C, Alfano RM, Cassani B, Ceva Grimaldi G, Roncalli M, Bosari S, Coggi G, Campo B, Gould VE. Molecular disorders in transitional vs. peripheral zone prostate adenocarcinoma. Int J Cancer 2001; 94:383-9. [PMID: 11745418 DOI: 10.1002/ijc.1485] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [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: 11/09/2022]
Abstract
Loss of heterozygosity (LOH) and microsatellite instability (MSI) have been shown to be mechanisms for tumor-suppressor gene inactivation in human oncogenesis. In our study, we examined LOH and MSI using 16 polymorphic markers of DNA for chromosomes 1, 3, 7, 8, 10 and 11. Microdissected tumor samples were isolated from 32 patients, representing 11 foci of incidentally discovered prostate cancer of the transitional zone (TZ), 12 prostate cancer of the peripheral zone (PZ) and 10 of high-grade PIN. We found loss of heterozygosity in the TZ group in 91% of informative cases (10/11) with al least 1 marker compared to 58% of cases (7/12) in PZ group and 70% of cases (7/10) in the HGPIN group. Chromosome 7 showed the highest rate of allelic loss in all 3 categories, with loss of 43% of loci in PIN, 37% in TZ tumors and 31% in PZ tumors. At chromosome 11, LOH was detected in 26% of loci in the TZ group, in 7% of loci in the PZ group and in 13% of loci in the PIN group. On chromosome 8, the PZ and HGPIN group showed allelic loss in 22% and 21% of loci, respectively, compared to 10% detected in the TZ group. The TZ group showed a significant higher rate of allelic instability compared to that observed in tumor samples from the peripheral zone: 73% of cases (8/11) showed genetic alterations (RER+ phenotype) in at least 4 loci analyzed compared to 8% and 10% in the PZ and HGPIN groups, respectively (p = 0.0006). These data suggest that transitional zone carcinoma and peripheral zone carcinoma display distinct and specific genetic alterations in different chromosomes. This diversity may help explain biologic and clinical differences between carcinomas arising in these distinct zones of the prostate. Also our results strongly suggest that the RER+ mutator phenotype could be linked to early development of transitional zone prostate carcinoma.
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Affiliation(s)
- P Colombo
- Department of Pathology, Humanitas Clinical Institute of Rozzano, Milan, Italy.
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24
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Yin Z, Babaian RJ, Troncoso P, Strom SS, Spitz MR, Caudell JJ, Stein JD, Kagan J. Limiting the location of putative human prostate cancer tumor suppressor genes on chromosome 18q. Oncogene 2001; 20:2273-80. [PMID: 11402322 DOI: 10.1038/sj.onc.1204310] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2000] [Revised: 09/19/2000] [Accepted: 01/29/2001] [Indexed: 11/09/2022]
Abstract
We studied loss of heterozygosity (LOH) on the long arm of human chromosome 18 in prostate cancer to determine the location of a putative tumor suppressor gene (TSG) and to correlate these losses with the pathological grade and stage of the cancer. Of 48 specimens analysed 17 (35.4%) lost at least one allele on chromosome 18q. All the specimens with allelic losses lost at least one allele within chromosomal region 18q21. Allelic losses picked at D18S51 (19%) and D18S858 (17%). A 0.58 cM DNA segment that includes the D18S858 locus and is flanked by the microsatellite loci D18S41 and D18S381, was lost in eight (47%) of 17 specimens with allelic losses. This segment was designated as a LOH cluster region 1 (LCR 1). Although Smad2 resides within LCR 1, it was not mutated in any of the six prostate cell lines (five prostate cancer cell lines and one immortalized prostate epithelial cell line) analysed, suggesting that it is not a candidate TSG in prostate cancer. A second LCR at 18q21, LCR 2, includes the D18S51 locus and is flanked by the D18S1109 and D18S68 loci, which are separated by 7.64 cM. LCR 2 was lost in six (35%) of the 17 specimens with chromosome 18q losses. These results suggest that chromosome 18q21 may harbor two candidate prostate cancer TSGs. The candidate TSGs DCC and Smad4 are located centromeric to the LCRs. No alleles were lost within or in close proximity to these genes, suggesting that they are not targets for inactivation by allelic losses in prostate cancer. Although there was no obvious correlation between chromosome 18q LOH and the pathological grade or stage, three (37.5%) of eight low-grade cancers and nine (32.1%) of 28 organ-confined cancers lost alleles at 18q21, suggesting that allelic losses are relatively early events in the development of invasive prostate cancer.
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Affiliation(s)
- Z Yin
- Division of Pathology and Laboratory Medicine, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, TX 77030-4095, USA
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25
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Webber MM, Quader ST, Kleinman HK, Bello-DeOcampo D, Storto PD, Bice G, DeMendonca-Calaca W, Williams DE. Human cell lines as an in vitro/in vivo model for prostate carcinogenesis and progression. Prostate 2001; 47:1-13. [PMID: 11304724 DOI: 10.1002/pros.1041] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND The study of prostate carcinogenesis and tumor progression is made difficult by the lack of appropriate in vitro and in vivo models. High prevalence of prostatic intra-epithelial neoplasia and latent prostatic carcinoma, representing multiple steps in carcinogenesis to invasive carcinoma, are relevant targets for cancer prevention. From the RWPE-1, immortalized, non-tumorigenic, human prostate epithelial cell line, we have derived four tumorigenic cell lines with progressive malignant characteristics. METHODS Cell lines were derived by exposure of RWPE-1 to N-methyl-N-nitrosourea (MNU), selected and cloned in vivo and in vitro, and characterized by prostatic epithelial and differentiation markers, karyotype analysis, anchorage-independent growth, invasiveness, tumorigenicity, and pathology of the derived tumors. RESULTS Cytokeratins 8 and 18, androgen receptor, and prostate-specific antigen expression in response to androgen, confirm prostatic epithelial origin. RWPE-1 cells do not grow in agar and are not tumorigenic in mice, but the growth, tumorigenicity, and tumor pathology of the MNU cell lines correlate with their invasive ability. The WPE1-NA22 (least malignant) form small, well-differentiated, and WPE1-NB26 cells (most malignant) form large, poorly differentiated, invasive tumors. Overall, loss of heterozygosity for chromosomes 7q, 13q, 18q, and 22, and gain of 5, 9q, 11q, and 20, was observed. The MNU cell lines, in order of increasing malignancy are; WPE1-NA22, WPE1-NB14, WPE1-NB11, and WPE1-NB26. CONCLUSIONS This family of cell lines with a common lineage represents a unique and relevant model which mimics stages in prostatic intra-epithelial neoplasia (PIN) and progression to invasive cancer, and can be used to study carcinogenesis, progression, intervention, and chemoprevention.
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Affiliation(s)
- M M Webber
- Department of Zoology and Medicine, Michigan State University, East Lansing 48824-1312, USA.
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Abstract
Microcell-mediated chromosome transfer allows for the introduction of normal chromosomes into tumor cells in an effort to identify putative tumor suppressor genes. We have used this approach to introduce an intact copy of chromosome 18 into the prostate cancer cell line DU145, and independently to introduce human chromosomes 8 and 18 into the prostate cancer cell line TSU-PR1. Introduction of an extra copy of human chromosome 8 had no effect on the growth properties in vitro or the tumorigenicity in vivo of TSU-PR1 cells. However, microcell hybrids containing an introduced copy of human chromosome 18 exhibited a longer population doubling time, retarded growth in soft agar, and slowed tumor growth in athymic nude mice. These experiments provide functional evidence for the presence of one or more tumor suppressor genes on human chromosome 18 that are involved in prostate cancer.
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Affiliation(s)
- S S Padalecki
- Department of Medicine, Division of Endocrinology, University of Texas Health Science Center at San Antonio, San Antonio, Texas 78229, USA
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27
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Aurich-Costa J, Vannier A, Grégoire E, Nowak F, Cherif D. IPM-FISH, a new M-FISH approach using IRS-PCR painting probes: Application to the analysis of seven human prostate cell lines. Genes Chromosomes Cancer 2001. [DOI: 10.1002/1098-2264(2000)9999:9999<::aid-gcc1076>3.0.co;2-e] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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28
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Takimoto Y, Shimazui T, Akaza H, Sato N, Noguchi M. Genetic heterogeneity of surgically resected prostate carcinomas and their biopsy specimens is related to their histologic differentiation. Cancer 2001; 91:362-70. [DOI: 10.1002/1097-0142(20010115)91:2<362::aid-cncr1010>3.0.co;2-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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29
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Austrup F, Uciechowski P, Eder C, Böckmann B, Suchy B, Driesel G, Jäckel S, Kusiak I, Grill HJ, Giesing M. Prognostic value of genomic alterations in minimal residual cancer cells purified from the blood of breast cancer patients. Br J Cancer 2000; 83:1664-73. [PMID: 11104564 PMCID: PMC2363462 DOI: 10.1054/bjoc.2000.1501] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The prognostic value of disseminated tumour cells derived from 353 breast cancer patients was evaluated. Disseminated tumour cells were purified from blood using a newly established method and nucleic acids were subsequently isolated. We investigated genomic imbalances (GI) such as mutation, amplification and loss of heterozygosity of 13 tumour suppressor genes and 2 proto-oncogenes using DNA from isolated minimal residual cancer cells. Significant correlations were found between genomic alterations of the DCC - and c-erbB-2 genes in disseminated breast cancer cells and actuarial relapse-free survival. Furthermore, increasing numbers of genomic imbalances measured in disseminated tumour cells were significantly associated with worse prognosis of recurrent disease. Logistic regression and Cox multivariate analysis led to the identification of genomic imbalances as an independent prognostic factor. Determination of disseminated tumour cells by genotyping of oncogenes and tumour suppressor genes seems not only to be a useful adjunct in follow up of carcinoma patients but provides also valuable additional individualized prognostic and predictive information in breast cancer patients beyond the TNM system.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Breast Neoplasms/blood
- Breast Neoplasms/genetics
- Breast Neoplasms/pathology
- Cell Adhesion Molecules/genetics
- DCC Receptor
- DNA, Neoplasm/genetics
- Female
- Genes, ras/genetics
- Humans
- Loss of Heterozygosity
- Microsatellite Repeats
- Middle Aged
- Mutation
- Neoplasm, Residual/blood
- Neoplasm, Residual/genetics
- Neoplasm, Residual/pathology
- Neoplastic Cells, Circulating/metabolism
- Neoplastic Cells, Circulating/pathology
- Polymorphism, Restriction Fragment Length
- Predictive Value of Tests
- Prognosis
- Proto-Oncogene Proteins c-myc/genetics
- Receptor, ErbB-2/genetics
- Receptors, Cell Surface
- Retinoblastoma Protein/genetics
- Survival Analysis
- Tumor Cells, Cultured
- Tumor Suppressor Protein p53/genetics
- Tumor Suppressor Proteins
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Affiliation(s)
- F Austrup
- Institut für Molekulare NanoTechnologie, Berghäuser Str. 295, Recklinghausen, 45659, Germany
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30
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C.Stern1 M, Benavides F, A.Klingelberger E, J.Conti2 C. Allelotype analysis of chemically induced squamous cell carcinomas in F1 hybrids of two inbred mouse strains with different susceptibility to tumor progression. Carcinogenesis 2000. [DOI: 10.1093/carcin/21.5.297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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31
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C.Stern1 M, Benavides F, A.Klingelberger E, J.Conti2 C. Allelotype analysis of chemically induced squamous cell carcinomas in F 1 hybrids of two inbred mouse strains with different susceptibility to tumor progression. Carcinogenesis 2000. [DOI: 10.1093/carcin/21.7.1297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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32
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Abstract
Like most cancers, prostate cancer (CaP) is believed to be the result of the accumulation of genetic alterations within cells. Previous studies have implicated numerous chromosomal regions with elevated rates of allelic imbalance (AI), using mostly primary CaPs with an unknown disease outcome. These regions of AI are proposed sites for tumor suppressor genes. One of the regions previously implicated as coding for at least one tumor suppressor gene is the long arm of chromosome 18 (18q). To confirm this observation, as well as to narrow the critical region for this putative tumor suppressor, we analyzed 32 metastatic CaP specimens for AI on chromosome 18q. Thirty-one of these 32 specimens (96.8%) exhibited AI at one or more loci on chromosome 18q. Our analysis using 17 polymorphic markers revealed statistically significant AI on chromosome 18q at 3 markers, D18S35, D18S64 and D18S461. Using these markers as a guide, we have been able to identify 2 distinct minimum regions of AI on 18q. The first region is between the genetic markers D18S1119 and D18S64. The second region lies more distal on the long arm of the chromosome and is between the genetic markers D18S848 and D18S58. To determine if 18q loss is a late event in the progression of CaP, we also examined prostatic intraepithelial neoplasia (PIN) and primary prostate tumors from 17 patients for AI with a subset of 18q markers. We found significantly higher AI in the metastatic samples. Our results are consistent with 18q losses occurring late in CaP progression.
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Affiliation(s)
- S S Padalecki
- Department of Cellular and Structural Biology, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
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33
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Sato K, Qian J, Slezak JM, Lieber MM, Bostwick DG, Bergstralh EJ, Jenkins RB. Clinical significance of alterations of chromosome 8 in high-grade, advanced, nonmetastatic prostate carcinoma. J Natl Cancer Inst 1999; 91:1574-80. [PMID: 10491435 DOI: 10.1093/jnci/91.18.1574] [Citation(s) in RCA: 183] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Chromosome 8 alterations, including loss of 8p21-22 and gain of 8q24, are commonly observed in prostate carcinoma. We examined whether these alterations are associated with poor prognosis in prostate cancer. METHODS We used dual-probe fluorescence in situ hybridization and DNA probes for 8p22 (lipoprotein lipase gene), centromere 8 (8cen), and 8q24 (c-myc gene) to determine the corresponding copy numbers in tumor samples from 144 patients with high-grade, advanced (stage III) prostate carcinoma. Cox models were used for multivariate analysis of systemic progression or patient death from prostate cancer. All statistical tests are two-sided. RESULTS We classified the 8p22, 8cen, and c-myc copy number as normal, loss, and gain. An additional increase (AI) category of c-myc relative to the centromere copy number (i.e., overrepresentation and amplification of c-myc) was also used. Alterations of 8p22 were not statistically significantly associated with either systemic progression or patient death. Alterations of c-myc were associated with both systemic progression (P =.024) and patient death (P =.039); AI of c-myc showed the poorest outcome. We also evaluated the prognostic relevance of the combined 8p22-8cen-c-myc loci anomaly pattern for the following six patterns: normal-normal-normal, loss-any 8cen-normal, loss-gain-gain, gain-gain-gain, non-loss-any 8cen-AI, and loss-any 8cen-AI, where any 8cen is normal, loss, or gain of the chromosome 8 centromere. Patients with the loss-any 8cen-AI pattern had earlier systemic progression (P =.009) and earlier cause-specific death (P =.013) than did patients with other patterns. Multivariate analyses demonstrated that the loss-any 8cen-AI pattern was an independent risk factor for systemic progression (P<.001) and cause-specific death (P =.002). CONCLUSIONS Genetic alterations of chromosome 8 appear to accumulate in parallel with the progression of prostate carcinomas. AI of the c-myc gene, especially with loss of 8p22, appears to be associated with poor patient prognosis.
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Affiliation(s)
- K Sato
- Department of Urology, Mayo Clinic, Rochester, MN 55905, USA
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Abstract
BACKGROUND Loss of heterozygosity (LOH) on chromosome arm 18q is common in sporadic prostate cancer and may be involved in cancer development through inactivation of tumor-suppressor genes (TSG). Recent identification, at 18q21.1, of MADR2/Smad2, a key component in transforming growth factor beta (TGFbeta)-family signaling pathways, led us to investigate the role of this gene in prostate tumorigenesis. METHODS Sporadic primary prostate tumors from 25 patients with clinically localized tumors and 7 with metastatic forms were examined for MADR2/Smad2 mutations by using polymerase chain reaction-single-strand conformational polymorphism (PCR-SSCP) analysis of cDNA, and for gene expression by quantitative reverse transcription-polymerase chain reaction (RT-PCR). RESULTS We detected no mutation in MADR2/Smad2 and no abnormal mRNA expression. CONCLUSIONS Despite recent evidence indicating that MADR2/Smad2 acts as a tumor-suppressor gene, our findings suggest a limited role of this gene in prostate tumorigenesis, at least in the early stages. Another key tumor-suppressor gene may therefore be the main target of the observed LOH at 18q21.1.
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MESH Headings
- Biopsy, Needle
- Chromosomes, Human, Pair 18/genetics
- DNA Mutational Analysis
- DNA Primers/chemistry
- DNA, Complementary/chemistry
- DNA-Binding Proteins/chemistry
- DNA-Binding Proteins/genetics
- Electrophoresis, Agar Gel
- Electrophoresis, Polyacrylamide Gel
- Gene Expression Regulation, Neoplastic
- Genes, Tumor Suppressor/genetics
- Humans
- Loss of Heterozygosity/genetics
- Male
- Polymorphism, Single-Stranded Conformational
- Prostate/chemistry
- Prostate/physiopathology
- Prostatectomy
- Prostatic Neoplasms/chemistry
- Prostatic Neoplasms/genetics
- RNA, Messenger/metabolism
- RNA, Neoplasm/chemistry
- RNA, Neoplasm/isolation & purification
- Reverse Transcriptase Polymerase Chain Reaction
- Sequence Analysis, DNA
- Smad2 Protein
- Trans-Activators/chemistry
- Trans-Activators/genetics
- Transforming Growth Factor beta/chemistry
- Transforming Growth Factor beta/genetics
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Affiliation(s)
- A Latil
- Laboratoire d'Oncogénétique, Centre René Huguenin, St.-Cloud, France
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35
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Abstract
Genetic alterations in primary prostate cancer (CaP) have been extensively studied, yet little is known about the genetic mechanisms underlying progression of primary CaP to metastatic prostate cancer. As a result, it is not possible to distinguish clinically indolent localized disease from potentially life-threatening tumors with high metastatic potential. To address this question, we collected tissue from 34 autopsy-derived metastases, samples rarely analyzed in previous studies. These were compared to a separate set of 17 prostatectomy specimens containing 22 foci of CaP associated with 49 examples of high-grade prostatic intraepithelial neoplasia (PIN), a histological precursor of CaP. We compared the loss of heterozygosity (LOH) profiles of high-grade PIN, primary CaP and metastases by analyzing 33 microsatellite markers previously found to have high frequencies of LOH in primary CaP. These markers were on chromosomes 5q, 6q, 7q, 8p, 9p, 10q, 11p, 13q, 16q, 17, 18q and 21q. In addition, markers on chromosomes 4p, 11q, 14q and 20q with no reported LOH in primary CaP were analyzed to determine the frequency of background LOH. In PIN lesions, the rate of LOH was significant only at D5S806 (20%) and D16S422 (29%). In addition, different PIN lesions within the same prostate gland were genetically diverse, indicating divergent evolution of synchronous neoplastic precursor lesions. LOH frequency was progressively higher in primary CaP and metastatic lesions. In primary CaP, significant losses occurred at the 8p, 10q, 11p, 16q, 17p, 18q and 21q loci (range 17-43%). Distinct patterns of LOH frequencies were observed in primary CaP compared with metastases. Although some loci (D16S422, D17S960, D21S156) showed similar frequencies of LOH in primary CaP and metastatic CaP, most other loci showed up to 7-fold metastasis-related increases. The metastatic samples revealed previously unrecognized prostate cancer LOH at D5S806, D6S262, D9S157, D13S133 and D13S227. These significant stage-specific differences in LOH frequency specify genetic loci that may play key roles in CaP progression and could represent clinically useful biomarkers for CaP aggressiveness.
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Affiliation(s)
- T Saric
- Department of Pathology, University of Texas Health Science Center at San Antonio, 78284-7750, USA
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36
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Affiliation(s)
- E Ruijter
- Department of Urology, University Hospital Nijmegen, The Netherlands
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37
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Chughtai SA, Crundwell MC, Cruickshank NR, Affie E, Armstrong S, Knowles MA, Takle LA, Kuo M, Khan N, Phillips SM, Neoptolemos JP, Morton DG. Two novel regions of interstitial deletion on chromosome 8p in colorectal cancer. Oncogene 1999; 18:657-65. [PMID: 9989816 DOI: 10.1038/sj.onc.1202340] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [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: 12/30/2022]
Abstract
We have investigated interstitial deletions of chromosome 8 in 70 colorectal carcinomas and 11 colonic adenomas using 11 microsatellite markers, including eight spanning the centromeric region of chromosome 8p (p11.2-p12). Allelic loss or imbalance was observed in 38 (54%) cancers and four (36%) adenomas. Twenty-eight (40%) of the cancers had deletions of 8p11.2-p12. Two distinct and independent regions of interstitial loss were found within this region. Fluorescent in situ hybridization, using an alpha satellite repeat probe to the centromere of 8p and two probes to the P1 region, was performed in four tumours that demonstrated allelic imbalance. Localized heterozygous deletions were confirmed in all four tumours. Eleven (16%) cancers had localized deletion in the region ANK-1 to D8S255 (P1) and a further eleven (16%) cancers had a less well localized deletion in the region defined by the markers D8S87 to D8S259 (P2). Loss of both centromeric loci was identified in a further six (9%) tumours. A functional significance for these two deletion regions was sought by correlation with primary and secondary tumour characteristics. Isolated P2 deletion was associated with 'early' T1 cancers (2p=0.0002), and were also identified in 3/11 adenomas. Conversely, interstitial deletions of the P1 locus were more frequently seen in 'locally invasive' T3/4 cancers (2p=0.015), and isolated P1 deletions were also associated with the presence of liver metastases (2p=0.016). Our data provide evidence of at least two genes within the 8p11.2-p12 region, mutations in which may confer different and independent roles in the pathogenesis of colorectal cancer.
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Affiliation(s)
- S A Chughtai
- Department of Surgery, University of Birmingham, Edgbaston, UK
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38
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Watanabe M, Shiraishi T, Muneyuki T, Nagai M, Fukutome K, Murata M, Kawamura J, Yatani R. Allelic loss and microsatellite instability in prostate cancers in Japan. Oncology 1998; 55:569-74. [PMID: 9778625 DOI: 10.1159/000011914] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [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: 11/19/2022]
Abstract
A series of 25 primary prostate cancers in Japanese were screened for loss of heterozygosity and microsatellite instability using twelve microsatellite markers containing APC, DCC, TP53, BRCA1, and BRCA2. Frequent loss of heterozygosity was observed for D8S201 (48%), LPL (48%), and DCC (26%). In contrast, the incidence did not exceed 15% at BRCA1 and BRCA2 loci. Microsatellite instability was observed in 28% of stage B, C, and D cancers. These data suggest that microsatellite instability and loss of unidentified genes on chromosome 8p may be involved in carcinogenesis of the prostate; however, BRCA1 and BRCA2 may not be largely involved in the development of prostate cancer in the Japanese population.
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Affiliation(s)
- M Watanabe
- 2nd Department of Pathology, Mie University School of Medicine, Mie, Japan
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39
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Prasad MA, Trybus TM, Wojno KJ, Macoska JA. Homozygous and frequent deletion of proximal 8p sequences in human prostate cancers: Identification of a potential tumor suppressor gene site. Genes Chromosomes Cancer 1998. [DOI: 10.1002/(sici)1098-2264(199811)23:3<255::aid-gcc8>3.0.co;2-0] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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40
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Affiliation(s)
- M.C. Crundwell
- From the Department of Surgery, University of Birmingham, the Department of Urology, City Hospital NHS Trust, and the Department of Pathology, City Hospital NHS Trust, Birmingham, United Kingdom
| | - D.G. Arkell
- From the Department of Surgery, University of Birmingham, the Department of Urology, City Hospital NHS Trust, and the Department of Pathology, City Hospital NHS Trust, Birmingham, United Kingdom
| | - J. Gearty
- From the Department of Surgery, University of Birmingham, the Department of Urology, City Hospital NHS Trust, and the Department of Pathology, City Hospital NHS Trust, Birmingham, United Kingdom
| | - S.M.A. Phillips
- From the Department of Surgery, University of Birmingham, the Department of Urology, City Hospital NHS Trust, and the Department of Pathology, City Hospital NHS Trust, Birmingham, United Kingdom
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41
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Crundwell MC, Arkell DG, Gearty J, Phillips SMA. GENETIC ALTERATIONS IN INCIDENTALLY DIAGNOSED, TRANSITIONAL ZONE PROSTATE CANCER. J Urol 1997. [DOI: 10.1097/00005392-199710000-00077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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