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Ermis Akyuz E, Bell SM. The Diverse Role of CUB and Sushi Multiple Domains 1 (CSMD1) in Human Diseases. Genes (Basel) 2022; 13:genes13122332. [PMID: 36553598 PMCID: PMC9778380 DOI: 10.3390/genes13122332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/01/2022] [Accepted: 12/02/2022] [Indexed: 12/14/2022] Open
Abstract
CUB and Sushi Multiple Domains 1 (CSMD1), a tumour suppressor gene, encodes a large membrane-bound protein including a single transmembrane domain. This transmembrane region has a potential tyrosine phosphorylation site, suggesting that CSMD1 is involved in controlling cellular functions. Although the specific mechanisms of action for CSMD1 have not yet been uncovered, it has been linked to a number of processes including development, complement control, neurodevelopment, and cancer progression. In this review, we summarise CSMD1 functions in the cellular processes involved in the complement system, metastasis, and Epithelial mesenchymal transition (EMT) and also in the diseases schizophrenia, Parkinson's disease, and cancer. Clarifying the association between CSMD1 and the aforementioned diseases will contribute to the development of new diagnosis and treatment methods for these diseases. Recent studies in certain cancer types, e.g., gastric cancer, oesophageal cancer, and head and neck squamous cell carcinomas, have indicated the involvement of CSMD1 in response to immunotherapy.
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Jeon YJ, Kim T, Park D, Nuovo GJ, Rhee S, Joshi P, Lee BK, Jeong J, Suh SS, Grotzke JE, Kim SH, Song J, Sim H, Kim Y, Peng Y, Jeong Y, Garofalo M, Zanesi N, Kim J, Liang G, Nakano I, Cresswell P, Nana-Sinkam P, Cui R, Croce CM. miRNA-mediated TUSC3 deficiency enhances UPR and ERAD to promote metastatic potential of NSCLC. Nat Commun 2018; 9:5110. [PMID: 30504895 PMCID: PMC6269493 DOI: 10.1038/s41467-018-07561-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 11/09/2018] [Indexed: 02/05/2023] Open
Abstract
Non-small cell lung carcinoma (NSCLC) is leading cause of cancer-related deaths in the world. The Tumor Suppressor Candidate 3 (TUSC3) at chromosome 8p22 known to be frequently deleted in cancer is often found to be deleted in advanced stage of solid tumors. However, the role of TUSC3 still remains controversial in lung cancer and context-dependent in several cancers. Here we propose that miR-224/-520c-dependent TUSC3 deficiency enhances the metastatic potential of NSCLC through the alteration of three unfolded protein response pathways and HRD1-dependent ERAD. ATF6α-dependent UPR is enhanced whereas the affinity of HRD1 to its substrates, PERK, IRE1α and p53 is weakened. Consequently, the alteration of UPRs and the suppressed p53-NM23H1/2 pathway by TUSC3 deficiency is ultimately responsible for enhancing metastatic potential of lung cancer. These findings provide mechanistic insight of unrecognized roles of TUSC3 in cancer progression and the oncogenic role of HRD1-dependent ERAD in cancer metastasis.
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Affiliation(s)
- Young-Jun Jeon
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, 43210, USA
- Stanford Cancer Institute, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Taewan Kim
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, 43210, USA
| | - Dongju Park
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, 43210, USA
| | - Gerard J Nuovo
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, 43210, USA
| | - Siyeon Rhee
- Department of Biology, Stanford University, Stanford, CA, 94305, USA
| | - Pooja Joshi
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, 43210, USA
| | - Bum-Kyu Lee
- Institute for Cellular and Molecular Biology, Center for Systems and Synthetic Biology, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Johan Jeong
- Department of Pathology, Stanford University, Stanford, CA, 94305, USA
| | - Sung-Suk Suh
- Department of Biosciences, Mokpo National University, Muan, 58554, South Korea
| | - Jeff E Grotzke
- Departments of Immunobiology, Yale University School of Medicine, New Haven, CT, 06520, USA
| | - Sung-Hak Kim
- Department of Animal Science, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, 61186, Korea
- Gwangju Center, Korea Basic Science Institute, Gwangju, 61186, Korea
| | - Jieun Song
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, 43210, USA
| | - Hosung Sim
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, 43210, USA
| | - Yonghwan Kim
- Department of Life System, Sookmyung Woman's University, Seoul, 140-742, Republic of Korea
| | - Yong Peng
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, 43210, USA
- Department of Thoracic Surgery, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, 610041, Chengdu, China
| | - Youngtae Jeong
- Stanford Cancer Institute, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Michela Garofalo
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, 43210, USA
- Transcriptional Networks in Lung Cancer Group, Cancer Research United Kingdom Manchester Institute, University of Manchester, Manchester, M20 4BX, United Kingdom
| | - Nicola Zanesi
- Department of Cancer Biology and Genetics, The Ohio State University, Columbus, OH, 43210, USA
| | - Jonghwan Kim
- Institute for Cellular and Molecular Biology, Center for Systems and Synthetic Biology, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Guang Liang
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Ichiro Nakano
- Department of Neurosurgery UAB Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Peter Cresswell
- Departments of Immunobiology, Howard Hughes Medical Institute, Yale University School of Medicine, New Haven, CT, 06520, USA
| | - Patrick Nana-Sinkam
- Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Medical Oncology, The Ohio State University, Columbus, OH, 43210, USA
| | - Ri Cui
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, 43210, USA.
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China.
| | - Carlo M Croce
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH, 43210, USA.
- Department of Cancer Biology and Genetics, The Ohio State University, Columbus, OH, 43210, USA.
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Patel V, Leethanakul C, Gutkind JS. New Approaches To the Understanding of the Molecular Basis of Oral Cancer. ACTA ACUST UNITED AC 2016; 12:55-63. [PMID: 11349962 DOI: 10.1177/10454411010120010401] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Cancers of the oral cavity, salivary glands, larynx, and pharynx, collectively referred to as squamous cell carcinomas of the head and neck (HNSCC), are the sixth most common cancer among men in the developed world. The prognosis of HNSCC patients is still poor, which reflects the fact that although the risk factors for HNSCC are well-recognized, very little is known about the molecular mechanisms responsible for this malignancy. This review describes some of the current efforts and technological advances that have focused on the creation of a complete information infrastructure for genes expressed during squamous cell carcinogenesis. These include: the recently described HNSCC-specific chromosomal alterations (cCAP); the Head and Neck Cancer Genome Anatomy Project (HN-CGAP), whose goal is the systematic identification and cataloguing of known and novel genes expressed during tumor development; and the use of laser-capture microdissection (LCM), which is pivotal for the comprehensive molecular characterization of normal, pre-cancerous, and malignant cells by means of DNA-array technology. The latter provides the means for the analysis of expression patterns of thousands of genes simultaneously. The use of LCM for proteomics and DNA analysis is also included in this review. These revolutionary approaches are likely to have an unprecedented impact on cancer biology, and provide exciting opportunities to unravel the still-unknown mechanisms involved in squamous cell carcinogenesis. They are also expected to provide a molecular blueprint for HNSCC, thus helping to identify suitable markers for the early detection of pre-neoplastic lesions, as well as novel targets for pharmacological intervention in this disease.
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Affiliation(s)
- V Patel
- Oral & Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA
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Gao G, Johnson SH, Vasmatzis G, Pauley CE, Tombers NM, Kasperbauer JL, Smith DI. Common fragile sites (CFS) and extremely large CFS genes are targets for human papillomavirus integrations and chromosome rearrangements in oropharyngeal squamous cell carcinoma. Genes Chromosomes Cancer 2016; 56:59-74. [PMID: 27636103 DOI: 10.1002/gcc.22415] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 09/12/2016] [Accepted: 09/13/2016] [Indexed: 01/04/2023] Open
Abstract
Common fragile sites (CFS) are chromosome regions that are prone to form gaps or breaks in response to DNA replication stress. They are often found as hotspots for sister chromatid exchanges, deletions, and amplifications in different cancers. Many of the CFS regions are found to span genes whose genomic sequence is greater than 1 Mb, some of which have been demonstrated to function as important tumor suppressors. CFS regions are also hotspots for human papillomavirus (HPV) integrations in cervical cancer. We used mate-pair sequencing to examine HPV integration events and chromosomal structural variations in 34 oropharyngeal squamous cell carcinoma (OPSCC). We used endpoint PCR and Sanger sequencing to validate each HPV integration event and found HPV integrations preferentially occurred within CFS regions similar to what is observed in cervical cancer. We also found that many of the chromosomal alterations detected also occurred at or near the cytogenetic location of CFSs. Several large genes were also found to be recurrent targets of rearrangements, independent of HPV integrations, including CSMD1 (2.1Mb), LRP1B (1.9Mb), and LARGE1 (0.7Mb). Sanger sequencing revealed that the nucleotide sequences near to identified junction sites contained repetitive and AT-rich sequences that were shown to have the potential to form stem-loop DNA secondary structures that might stall DNA replication fork progression during replication stress. This could then cause increased instability in these regions which could lead to cancer development in human cells. Our findings suggest that CFSs and some specific large genes appear to play important roles in OPSCC. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Ge Gao
- Division of Experimental Pathology, Mayo Clinic, Rochester, MN
| | - Sarah H Johnson
- Biomarker Discovery Program, Center for Individualized Medicine, Mayo Clinic, Rochester, MN
| | - George Vasmatzis
- Biomarker Discovery Program, Center for Individualized Medicine, Mayo Clinic, Rochester, MN
| | | | | | | | - David I Smith
- Division of Experimental Pathology, Mayo Clinic, Rochester, MN
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5
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Park SW, Joo YH, Jung SH, Yim SH, Nam IC, Cho KJ, Kim MS, Chung YJ. Chromosomal aberrations and prognosis in patients with concomitant chemoradiotherapy for resected head and neck cancer. Oncol Rep 2016; 35:2207-15. [PMID: 26821349 DOI: 10.3892/or.2016.4595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 10/06/2015] [Indexed: 11/06/2022] Open
Abstract
Although concomitant chemoradiotherapy (CCRT) has recently become a mainstay of a primary treatment modality in advanced head and neck squamous cell carcinoma (HNSCC), some of the patients experience CCRT failure. If we can predict the CCRT outcomes, we can reduce unnecessary CCRT avoiding risk of CCRT‑related complication. We aimed to identify genetic alteration markers related to treatment failure in HNSCC patients who underwent radical surgery and CCRT. Genome‑wide copy number alterations (CNAs) were analyzed in 18 HNSCC patients with (n=9) or without (n=9) recurrence using oligoarray‑comparative genomic hybridization and candidate CNAs were validated by quantitative RT‑PCR. A total of 15 recurrently altered regions (RARs) were identified in the 18 HNSCC cases. Among them, two RARs were significantly associated with CCRT‑failure: copy number gained RARs of 7p11.2 harboring EGFR (P=0.029) and 18p11.32 harboring TYMS gene (P=0.029). Three RARs (7p11.2, 9p21.3 and 18p11.32) were significantly associated with poor disease‑specific survival in univariate analysis, and 7p11.2 was consistently significant in the multivariate analysis (HR 40.68, P=0.003). In conclusion, we defined novel genomic alterations associated with CCRT‑failure: 7p11.2 (EGFR) and 18p11.32 (TYMS). Our results provide useful clues for the elucidation of the molecular pathogenesis of HNSCC and to predict CCRT‑failure.
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Affiliation(s)
- Sung-Won Park
- Integrated Research Center for Genome Polymorphism College of Medicine, The Catholic University of Korea, Seocho-gu, Seoul 137‑701, Republic of Korea
| | - Young-Hoon Joo
- Department of Otolaryngology‑Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seocho-gu, Seoul 137‑040, Republic of Korea
| | - Seung-Hyun Jung
- Integrated Research Center for Genome Polymorphism College of Medicine, The Catholic University of Korea, Seocho-gu, Seoul 137‑701, Republic of Korea
| | - Seon-Hee Yim
- Integrated Research Center for Genome Polymorphism College of Medicine, The Catholic University of Korea, Seocho-gu, Seoul 137‑701, Republic of Korea
| | - In-Chul Nam
- Department of Otolaryngology‑Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seocho-gu, Seoul 137‑040, Republic of Korea
| | - Kwang-Jae Cho
- Department of Otolaryngology‑Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seocho-gu, Seoul 137‑040, Republic of Korea
| | - Min-Sik Kim
- Department of Otolaryngology‑Head and Neck Surgery, College of Medicine, The Catholic University of Korea, Seocho-gu, Seoul 137‑040, Republic of Korea
| | - Yeun-Jun Chung
- Integrated Research Center for Genome Polymorphism College of Medicine, The Catholic University of Korea, Seocho-gu, Seoul 137‑701, Republic of Korea
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Gollin SM. Cytogenetic alterations and their molecular genetic correlates in head and neck squamous cell carcinoma: a next generation window to the biology of disease. Genes Chromosomes Cancer 2014; 53:972-90. [PMID: 25183546 DOI: 10.1002/gcc.22214] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2014] [Accepted: 08/15/2014] [Indexed: 01/14/2023] Open
Abstract
Cytogenetic alterations underlie the development of head and neck squamous cell carcinoma (HNSCC), whether tobacco and alcohol use, betel nut chewing, snuff or human papillomavirus (HPV) causes the disease. Many of the molecular genetic aberrations in HNSCC result from these cytogenetic alterations. This review presents a brief introduction to the epidemiology of HNSCC, and discusses the role of HPV in the disease, cytogenetic alterations and their frequencies in HNSCC, their molecular genetic and The Cancer Genome Atlas (TCGA) correlates, prognostic implications, and possible therapeutic considerations. The most frequent cytogenetic alterations in HNSCC are gains of 5p14-15, 8q11-12, and 20q12-13, gains or amplifications of 3q26, 7p11, 8q24, and 11q13, and losses of 3p, 4q35, 5q12, 8p23, 9p21-24, 11q14-23, 13q12-14, 18q23, and 21q22. To understand their effects on tumor cell biology and response to therapy, the cytogenetic findings in HNSCC are increasingly being examined in the context of the biochemical pathways they disrupt. The goal is to minimize morbidity and mortality from HNSCC using cytogenetic abnormalities to identify valuable diagnostic biomarkers for HNSCC, prognostic biomarkers of tumor behavior, recurrence risk, and outcome, and predictive biomarkers of therapeutic response to identify the most efficacious treatment for each individual patient's tumor, all based on a detailed understanding of the next generation biology of HNSCC.
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Affiliation(s)
- Susanne M Gollin
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA; Departments of Otolaryngology and Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA; University of Pittsburgh Cancer Institute, Pittsburgh, PA
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7
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Erben P, Nowak D, Sauer C, Ströbel P, Hofmann WK, Hofheinz RD, Hohenberger P, Kasper B. Molecular analysis of desmoid tumors with a high-density single-nucleotide polymorphism array identifies new molecular candidate lesions. Oncol Res Treat 2012; 35:684-9. [PMID: 23147545 DOI: 10.1159/000343744] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Desmoid tumors are neoplastic proliferations of connective tissues. The mutation status of the gene coding for catenin (cadherin-associated protein) beta 1 (CTNNB1) and trisomy 8 on the chromosomal level have been described to have prognostic relevance. PATIENTS AND METHODS In order to elucidate new molecular mechanisms underlying these tumors, we carried out a molecular analysis with a genome-wide human high-density single-nucleotide polymorphism (SNP) array, in 9 patients. RESULTS Single samples showed numerical aberrations on chromosomes (Chrs) 20 and 6 with either trisomy 20 or monosomy 6. No trisomy 8 could be detected. Recurrent heterozygous deletions were found in Chr 5q (including the APC gene locus, n = 3) and Chr 8p23 (n = 4, containing coding regions for the potential tumor suppressor gene CSMD1). This novel deletion in 8p23 showed an association with local recurrence. In addition, structural chromosomal changes (gain of Chrs 8 and 20) were found in a minority of cases. CONCLUSION The genomic alteration affecting the candidate gene CSMD1 could be important in the development of desmoid tumors.
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Affiliation(s)
- Philipp Erben
- III. Medizinische Klinik, Sarkomzentrum, ITM - Interdisziplinäres Tumorzentrum, Universitätsmedizin Mannheim, Ruprecht-Karls-Universität Heidelberg, Mannheim, Germany
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8
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PATHARE SWAPNALIM, GERSTUNG MORITZ, BEERENWINKEL NIKO, SCHÄFFER ALEJANDROA, KANNAN SADHANA, PAI PRATHAMESH, PATHAK KALOK, BORGES ANITAM, MAHIMKAR MANOJB. Clinicopathological and prognostic implications of genetic alterations in oral cancers. Oncol Lett 2011; 2:445-451. [PMID: 21546976 PMCID: PMC3085881 DOI: 10.3892/ol.2011.271] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Accepted: 02/17/2011] [Indexed: 11/05/2022] Open
Abstract
This study evaluated the clinicopathological and prognostic implications of genetic alterations characterizing oral squamous cell carcinoma(OSCC). Comparative genomic hybridization(CGH) was used to identify chromosomal alterations present in primary OSCCs obtained from 97 pateints. In this population, tobacco use was a significant risk factor for OSCC. By contrast, all 97 of our samples are negative for human papillomavirus (HPV) DNA integration, which is another known risk factor for OSCC in certain populations. Results of the Fisher's exact test followed by Benjamini-Hochberg correction for multiple testing, showed a correlation of 7p gain and 8p loss with node-positive OSCC (p≤0.04 for both genetic alterations) and association of 11q13 gain with high-grade OSCC (p≤0.05). Univariate Cox-proportional hazard models, also corrected for multiple testing, showed significant association of 11q13 gain and 18q loss with decreased survival (p≤0.05). These findings were supported by multivariate analysis which revealed that 11q13 gain and 18q loss together serve as a strong bivariate predictor of poor prognosis. In conclusion, our study has identified genetic alterations that correlate significantly with nodal status, grade, and poor survival status of OSCC. These potential biomarkers may aid the current TNM system for better prediction of clinical outcome.
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Affiliation(s)
- SWAPNALI M. PATHARE
- Cancer Research Institute, Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre (TMC), Kharghar Node, Navi Mumbai 410210
| | - MORITZ GERSTUNG
- Department of Biosystems Science and Engineering, ETH Zurich, Basel, Switzerland
| | - NIKO BEERENWINKEL
- Department of Biosystems Science and Engineering, ETH Zurich, Basel, Switzerland
| | - ALEJANDRO A. SCHÄFFER
- Computational Biology Branch, National Center for Biotechnology Information, NIH, DHHS, Bethesda, MD, USA
| | - SADHANA KANNAN
- ECTU, Advanced Centre for Treatment, Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre (TMC), Kharghar Node, Navi Mumbai 410210
| | - PRATHAMESH PAI
- Tata Memorial Hospital, Tata Memorial Centre (TMC), Mumbai 400012
| | | | - ANITA M. BORGES
- Department of Pathology and Laboratory Medicine, S.L. Raheja Hospital, Mumbai 400016, India
| | - MANOJ B. MAHIMKAR
- Cancer Research Institute, Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre (TMC), Kharghar Node, Navi Mumbai 410210
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Joly S, Compton LM, Pujol C, Kurago ZB, Guthmiller JM. Loss of human β-defensin 1, 2, and 3 expression in oral squamous cell carcinoma. ACTA ACUST UNITED AC 2009; 24:353-60. [DOI: 10.1111/j.1399-302x.2009.00512.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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10
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Kamal M, Shaaban AM, Zhang L, Walker C, Gray S, Thakker N, Toomes C, Speirs V, Bell SM. Loss of CSMD1 expression is associated with high tumour grade and poor survival in invasive ductal breast carcinoma. Breast Cancer Res Treat 2009; 121:555-63. [PMID: 19669408 DOI: 10.1007/s10549-009-0500-4] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2009] [Accepted: 07/25/2009] [Indexed: 11/29/2022]
Abstract
CUB and SUSHI multiple domain protein 1 (CSMD1) is a candidate tumour suppressor gene that maps to chromosome 8p23, a region deleted in many tumour types including 50% of breast cancers. CSMD1 has homologies to proteins implicated in carcinogenesis. We aimed to study the expression pattern of the CSMD1 protein and evaluate its prognostic importance in invasive ductal carcinoma (IDC). An anti-CSMD1 antibody was developed and validated. The expression pattern of CSMD1 in normal breast and IDC samples was investigated by immunohistochemistry in 275 patients. Univariate and multivariate Cox regression analyses were performed. In normal breast duct epithelial cells, luminal, membranous and cytoplasmic CSMD1 staining was identified. Reduced expression of CSMD1 was detected in 79/275 (28.7%) of IDC cases. Low CSMD1 expression was significantly associated with high tumour grade (P = 0.003). CSMD1 expression was associated with overall survival (OS; HR = 0.607, 95%CI: 0.4-0.91, P = 0.018) but not with disease-free survival (DFS; HR = 0.81, 95%CI: 0.46-1.43, P = 0.48). Multivariate analysis showed that CSMD1, together with Nottingham Prognostic Index, was considered an independent predictor of OS (HR = 0.607, 95%CI: 0.4-0.91, P = 0.018) but not DFS (HR = 0.84, 95%CI: 0.46-1.5, P = 0.573). Reduction of CSMD1 expression was significantly associated with high tumour grade and decreased OS. Therefore, our results support the idea that CSMD1 is a tumour suppressor gene and suggest its possible use as a new prognostic biomarker. The membrane expression pattern of CSMD1 suggests that it may be a receptor or co-receptor involved in the process of signal transduction.
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Affiliation(s)
- Mohamed Kamal
- Leeds Institute of Molecular Medicine, University of Leeds, Wellcome Trust Brenner Building, Level 8, St James's University Hospital, Leeds LS9 7TF, UK
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11
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Alonso Guervós M, Alvarez Marcos C, Llorente JL, Sampedro Nuño A, Suárez C, Hermsen M. Genetic differences between primary larynx and pharynx carcinomas and their matched lymph node metastases by multiplex ligation-dependent probe amplification. Oral Oncol 2008; 45:600-4. [PMID: 18952489 DOI: 10.1016/j.oraloncology.2008.08.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2008] [Revised: 08/08/2008] [Accepted: 08/08/2008] [Indexed: 11/16/2022]
Abstract
Lymph nodes metastasis is a major risk factor related to poor survival in larynx and pharynx carcinomas. The aim of this study is to search for markers of lymph node involvement analyzing the genetic differences between primary larynx and pharynx squamous cell carcinomas and their corresponding lymph node metastases. Twenty-five primary tumors and their corresponding lymph node metastases were examined. DNA copy number changes of 37 genes were analyzed by multiplex ligation-dependent probe amplification (MLPA). Loss of CDKN2A (9p21) occurred in 14 out of 25 pairs (56%) of primary tumor and lymph node metastases. Loss of LMNA (1q21) was exclusively detected in 8 lymph node samples (32%). Loss of CTNNB1 (3p22) and gain of CDKN2D (19p13) were also significantly more frequent in lymph node metastases. Other aberrations related to lymph node metastases were loss of MFHAS1 (8p23), RECQL4 (8q24) and gain of N33 (8p22) and TP53 (17p13). Primary tumor and corresponding lymph node metastases showed common genetic changes. However, the lymph node metastases presented with a number of additional alterations. Acquisition of these alterations may play a role in lymphatic metastasis development.
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Affiliation(s)
- Marta Alonso Guervós
- Department of Otorhinolaryngology, IUOPA, Hospital Universitario Central de Asturias, Celestino Villamil s/n, 33006 Oviedo, Asturias, Spain.
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12
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Walsh JE, Lathers DMR, Chi AC, Gillespie MB, Day TA, Young MRI. Mechanisms of Tumor Growth and Metastasis in Head and Neck Squamous Cell Carcinoma. Curr Treat Options Oncol 2007; 8:227-38. [PMID: 17712533 DOI: 10.1007/s11864-007-0032-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The formation and progression of head and neck squamous cell carcinoma (HNSCC) is multisystemic and involves the immune system, vascularization, and dissemination. Immune involvement includes the subversion of anti-tumor defenses. Vascularization involves both angiogenesis and vasculogenesis. Dissemination involves local tumor invasion as well as distant metastasis through processes including angiogenesis and lymphangiogenesis. Current studies in the dysregulation of various processes, including genetic stability, angiogenesis, lymphangiogenesis, immune regulation, and immune function, are opening opportunities for the development of targeted tumor therapies. The interrelationship of these processes in HNSCC development will be explored in this review.
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Affiliation(s)
- Jarrett E Walsh
- Research Service, Ralph H. Johnson VA Medical Center, 109 Bee Street, Charleston, SC 29401-5799, USA
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13
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Lin CJ, Grandis JR, Carey TE, Gollin SM, Whiteside TL, Koch WM, Ferris RL, Lai SY. Head and neck squamous cell carcinoma cell lines: established models and rationale for selection. Head Neck 2007; 29:163-88. [PMID: 17312569 DOI: 10.1002/hed.20478] [Citation(s) in RCA: 199] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Head and neck squamous cell carcinoma (HNSCC) cell lines are important preclinical models in the search for novel and targeted therapies to treat head and neck cancer. Unlike many other cancer types, a wide variety of primary and metastatic HNSCC cell lines are available. An easily accessible guide that organizes important characteristics of HNSCC cell lines would be valuable for the selection of appropriate HNSCC cell lines for in vitro or in vivo studies. METHODS A literature search was performed. RESULTS Cell growth and culture parameters from HNSCC cell lines were catalogued into tables or lists of selected characteristics. Methods for establishing cancer cell lines and basic cell culture maintenance techniques were reviewed. CONCLUSIONS A compendium of HNSCC cell line characteristics is useful for organizing the accumulating information regarding cell line characteristics to assist investigators with the development of appropriate preclinical models.
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Affiliation(s)
- Charles J Lin
- Department of Otolaryngology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA.
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14
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Nakaya K, Yamagata HD, Arita N, Nakashiro KI, Nose M, Miki T, Hamakawa H. Identification of homozygous deletions of tumor suppressor gene FAT in oral cancer using CGH-array. Oncogene 2007; 26:5300-8. [PMID: 17325662 DOI: 10.1038/sj.onc.1210330] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Homozygous deletions (HD) provide an important resource for identifying the location of candidate tumor suppressor genes. To identify the tumor suppressor gene in oral cancer, we employed high-resolution comparative genomic hybridization (CGH)-array analysis. We identified a homozygous loss of FAT (4q35), a new member of the human cadherin superfamily, from genome-wide screening of copy number alterations in one primary oral cancer. This result was evaluated by genomic polymerase chain reaction in 13 oral cancer cell lines and 20 primary oral cancers and Southern blot in the cell lines. We found frequent exonic HD of FAT in the cell lines (3/13, 23%) and in primary oral cancers (16/20, 80%). FAT expression was absent in these cell lines. Homozygous deletion hot spots were observed in exon 1 (9/20, 45%) and exon 4 (7/20, 35%). Moreover, loss of gene expression was identified in other types of squamous cell carcinoma. The methylation status of the FAT CpG island in squamous cell carcinomas correlated negatively with its expression. Our results identify mutations in FAT as an important factor in the development of oral cancer and indicate the importance of FATs function in some squamous cell carcinomas.
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Affiliation(s)
- K Nakaya
- Department of Oral and Maxillofacial Surgery, Organ Function Regenerative and Reconstructive Surgery, Ehime University Graduate School of Medicine, Toon-city, Ehime, Japan
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15
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Tsantoulis PK, Kastrinakis NG, Tourvas AD, Laskaris G, Gorgoulis VG. Advances in the biology of oral cancer. Oral Oncol 2007; 43:523-34. [PMID: 17258495 DOI: 10.1016/j.oraloncology.2006.11.010] [Citation(s) in RCA: 131] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2006] [Revised: 09/30/2006] [Accepted: 11/02/2006] [Indexed: 12/13/2022]
Abstract
The incidence of oral cancer remains high and is associated with many deaths in both Western and Asian countries. Several risk factors for the development of oral cancer are now well known, including smoking, drinking and consumption of smokeless tobacco products. Genetic predisposition to oral cancer has been found in certain cases but its components are not yet entirely clear. In accordance with the multi-step theory of carcinogenesis, the natural history of oral cancer seems to gradually evolve through transitional precursor lesions from normal epithelium to a full-blown metastatic phenotype. A number of genomic lesions accompany this transformation and a wealth of related results has appeared in recent literature and is being summarized here. Furthermore, several key genes have been implicated, especially well-known tumor suppressors like the cyclin-dependent kinase inhibitors, TP53 and RB1 and oncogenes like the cyclin family, EGFR and ras. Viral infections, particularly with oncogenic HPV subtypes and EBV, can have a tumorigenic effect on oral epithelia and their role is discussed, along with potential therapeutic interventions. A brief explanatory theoretical model of oral carcinogenesis is provided and potential avenues for further research are highlighted.
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Affiliation(s)
- P K Tsantoulis
- Molecular Carcinogenesis Group, Laboratory of Histology and Embryology, Medical School, University of Athens, Antaiou 53 Str., Lamprini, Ano Patissia, GR-11146 Athens, Greece
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16
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White JS, Weissfeld JL, Ragin CCR, Rossie KM, Martin CL, Shuster M, Ishwad CS, Law JC, Myers EN, Johnson JT, Gollin SM. The influence of clinical and demographic risk factors on the establishment of head and neck squamous cell carcinoma cell lines. Oral Oncol 2006; 43:701-12. [PMID: 17112776 PMCID: PMC2025692 DOI: 10.1016/j.oraloncology.2006.09.001] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2006] [Revised: 09/08/2006] [Accepted: 09/11/2006] [Indexed: 01/15/2023]
Abstract
The purpose of this study was to generate stable cell cultures from head and neck squamous cell carcinomas (HNSCC), and retrospectively analyze the factors associated with successful cell line establishment. Fifty-two HNSCC cell lines were isolated from a series of 199 tumors collected between 1992 and 1997 at the University of Pittsburgh Medical Center. Cell lines were characterized at the molecular and cellular level to determine the features associated with cell line formation. Successful cell line formation was dependent on multiple factors, including gene amplification involving chromosomal band 11q13, local and/or regional involvement of lymph nodes, and alcohol usage. The establishment of HNSCC cell lines enriches the resources available for cancer research. Our findings indicate that generation of stable cell lines from HNSCC is biased towards tumors with a poor prognosis. Our 52 stable lines comprise one of the largest series of HNSCC cell lines in the literature, with complete demographic, histopathologic, clinical, and survival data.
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Affiliation(s)
- Jason S. White
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, School of Medicine and School of Dental Medicine, Pittsburgh, Pennsylvania
- Department of Epidemiology, University of Pittsburgh Graduate School of Public Health, School of Medicine and School of Dental Medicine, Pittsburgh, Pennsylvania
- University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania
| | - Joel L. Weissfeld
- Department of Epidemiology, University of Pittsburgh Graduate School of Public Health, School of Medicine and School of Dental Medicine, Pittsburgh, Pennsylvania
- University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania
| | - Camille C. R. Ragin
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, School of Medicine and School of Dental Medicine, Pittsburgh, Pennsylvania
- Department of Epidemiology, University of Pittsburgh Graduate School of Public Health, School of Medicine and School of Dental Medicine, Pittsburgh, Pennsylvania
- University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania
| | - Karen M. Rossie
- Department of Oral Medicine and Pathology, University of Pittsburgh Graduate School of Public Health, School of Medicine and School of Dental Medicine, Pittsburgh, Pennsylvania
| | - Christa Lese Martin
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, School of Medicine and School of Dental Medicine, Pittsburgh, Pennsylvania
| | - Michele Shuster
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, School of Medicine and School of Dental Medicine, Pittsburgh, Pennsylvania
| | - Chandramohan S. Ishwad
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, School of Medicine and School of Dental Medicine, Pittsburgh, Pennsylvania
| | - John C. Law
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, School of Medicine and School of Dental Medicine, Pittsburgh, Pennsylvania
| | - Eugene N. Myers
- Department of Otolaryngology, University of Pittsburgh Graduate School of Public Health, School of Medicine and School of Dental Medicine, Pittsburgh, Pennsylvania
| | - Jonas T. Johnson
- Department of Otolaryngology, University of Pittsburgh Graduate School of Public Health, School of Medicine and School of Dental Medicine, Pittsburgh, Pennsylvania
| | - Susanne M. Gollin
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, School of Medicine and School of Dental Medicine, Pittsburgh, Pennsylvania
- University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania
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17
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Kraus DM, Elliott GS, Chute H, Horan T, Pfenninger KH, Sanford SD, Foster S, Scully S, Welcher AA, Holers VM. CSMD1 is a novel multiple domain complement-regulatory protein highly expressed in the central nervous system and epithelial tissues. THE JOURNAL OF IMMUNOLOGY 2006; 176:4419-30. [PMID: 16547280 DOI: 10.4049/jimmunol.176.7.4419] [Citation(s) in RCA: 149] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
In this study, we describe the identification and in vitro functional activity of a novel multiple domain complement regulatory protein discovered based on its homology to short consensus repeat (SCR)-containing proteins of the regulators of complement activation (RCA) gene family. The rat cDNA encodes a predicted 388-kDa protein consisting of 14 N-terminal CUB domains that are separated from each other by a SCR followed by 15 tandem SCR domains, a transmembrane domain, and a short cytoplasmic tail. This protein is the homolog of the human protein of unknown function called the CUB and sushi multiple domains 1 (CSMD1) protein. A cloning strategy that incorporates the two C-terminal CUB-SCR domains and 12 of the tandem SCR repeats was used to produce a soluble rat CSMD1 protein. This protein blocked classical complement pathway activation in a comparable fashion with rat Crry but did not block alternative pathway activation. Analysis of CSMD1 mRNA expression by in situ hybridization and immunolabeling of neurons indicates that the primary sites of synthesis are the developing CNS and epithelial tissues. Of particular significance is the enrichment of CSMD1 in the nerve growth cone, the amoeboid-leading edge of the growing neuron. These results suggest that CSMD1 may be an important regulator of complement activation and inflammation in the developing CNS, and that it may also play a role in the context of growth cone function.
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Affiliation(s)
- Damian M Kraus
- Division of Rheumatology, University of Colorado Health Sciences Center, Denver, 80262, USA
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18
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Richter TM, Tong BD, Scholnick SB. Epigenetic inactivation and aberrant transcription of CSMD1 in squamous cell carcinoma cell lines. Cancer Cell Int 2005; 5:29. [PMID: 16153303 PMCID: PMC1239921 DOI: 10.1186/1475-2867-5-29] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2005] [Accepted: 09/09/2005] [Indexed: 01/17/2023] Open
Abstract
Background The p23.2 region of human chromosome 8 is frequently deleted in several types of epithelial cancer and those deletions appear to be associated with poor prognosis. Cub and Sushi Multiple Domains 1 (CSMD1) was positionally cloned as a candidate for the 8p23 suppressor but point mutations in this gene are rare relative to the frequency of allelic loss. In an effort to identify alternative mechanisms of inactivation, we have characterized CSMD1 expression and epigenetic modifications in head and neck squamous cell carcinoma cell lines. Results Only one of the 20 cell lines examined appears to express a structurally normal CSMD1 transcript. The rest express transcripts which either lack internal exons, terminate abnormally or initiate at cryptic promoters. None of these truncated transcripts is predicted to encode a functional CSMD1 protein. Cell lines that express little or no CSMD1 RNA exhibit DNA methylation of a specific region of the CpG island surrounding CSMD1's first exon. Conclusion Correlating methylation patterns and expression suggests that it is modification of the genomic DNA preceding the first exon that is associated with gene silencing and that methylation of CpG dinucleotides further 3' does not contribute to inactivation of the gene. Taken together, the cell line data suggest that epigenetic silencing and aberrant splicing rather than point mutations may be contributing to the reduction in CSMD1 expression in squamous cancers. These mechanisms can now serve as a focus for further analysis of primary squamous cancers.
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Affiliation(s)
- Toni M Richter
- Dept of Otolaryngology - Head and Neck Surgery, Washington University School of Medicine, Box 8115, 660 S. Euclid Ave., St. Louis, MO 63110, USA
| | - Benton D Tong
- Dept of Otolaryngology - Head and Neck Surgery, Washington University School of Medicine, Box 8115, 660 S. Euclid Ave., St. Louis, MO 63110, USA
| | - Steven B Scholnick
- Dept of Otolaryngology - Head and Neck Surgery, Washington University School of Medicine, Box 8115, 660 S. Euclid Ave., St. Louis, MO 63110, USA
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19
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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] [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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20
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Choi HR, Roberts DB, Johnigan RH, Sturgis EM, Rosenthal DI, Weber RS, Luna MA, Batsakis JG, El-Naggar AK. Molecular and clinicopathologic comparisons of head and neck squamous carcinoma variants: common and distinctive features of biological significance. Am J Surg Pathol 2004; 28:1299-310. [PMID: 15371945 DOI: 10.1097/01.pas.0000138003.46650.dc] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
To investigate, for the first time, the events associated with the phenotypic and clinical diversities of head and neck squamous carcinomas (HNSC), we performed molecular analyses on 92 primary tumors representing the entire spectrum of the morphologic subtypes using microsatellite markers at chromosome 3p, 4p, 8p, 9p, 11q, 17p, and 18q regions and correlated the results with the clinicopathologic features and patients' survival. Loss of heterozygosity (LOH) at D9S168 and D9S171 markers on chromosome 9p regions was commonly identified in all subtypes. Distinctive alterations in certain subtypes were noted at chromosomes 3p, 4p, 8p, and 11p regions. In general, less aggressive types (verrucous, papillary, and well-differentiated conventional) had a significantly lower LOH incidence than the more aggressive (basaloid, sarcomatoid, and high-grade conventional squamous carcinoma) categories. Significant association between LOH and age, stage, nodal status, and patient outcome was found. Survival analysis revealed that pathologic categorization (less versus more aggressive) and LOH at marker D11S4167 and D3S2432 are independent predictors of patients' survival. Our analysis also defined a set of limited markers that account for most of alterations within and across these tumor subtypes. Our study indicates that 1) certain genetic markers are common to all subtypes of HNSC supporting their early involvement in tumorigenesis, 2) inter- and intratumoral genetic differences evolve subsequently and may underlie their morphologic heterogeneity, 3) high incidence of LOH in certain regions characterizes aggressive tumors, 4) categorical classification and LOH at 11p and 3p regions independently correlated with patient survival, and 5) a limited set of markers identify the majority of genetic alterations in these tumors.
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Affiliation(s)
- Hong Ran Choi
- Department of Pathology, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA
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21
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Mattar R, Nonogaki S, Silva C, Alves V, Gama-Rodrigues JJ. P53 and Rb tumor suppressor gene alterations in gastric cancer. ACTA ACUST UNITED AC 2004; 59:172-80. [PMID: 15361981 DOI: 10.1590/s0041-87812004000400004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
UNLABELLED Inactivation of tumor suppressor genes has been frequently observed in gastric carcinogenesis. Our purpose was to study the involvement of p53, APC, DCC, and Rb genes in gastric carcinoma. METHOD Loss of heterozygosity of the p53, APC, DCC and Rb genes was studied in 22 gastric cancer tissues using polymerase chain reaction; single-strand conformation polymorphism of the p53 gene exons 5-6 and exons 7-8 was studied using 35S-dATP, and p53 expression was detected using a histological immunoperoxidase method with an anti-p53 clone. RESULTS AND DISCUSSION No loss of heterozygosity was observed in any of these tumor suppressor genes; homozygous deletion was detected in the Rb gene in 23% (3/13) of the cases of intestinal-type gastric carcinoma. Eighteen (81.8%) cases showed band mobility shifts in exons 5-6 and/or 7-8 of the p53 gene. The presence of the p53 protein was positive in gastric cancer cells in 14 cases (63.6%). Normal gastric mucosa showed negative staining for p53; thus, the immunoreactivity was likely to represent mutant forms. The correlation of band mobility shift and the immunoreactivity to anti-p53 was not significant (P =.90). There was no correlation of gene alterations with the disease severity. CONCLUSIONS The inactivation of Rb and p53 genes is involved in gastric carcinogenesis in our environment. Loss of the Rb gene observed only in the intestinal-type gastric cancer should be further evaluated in association with Helicobacter pylori infection. The p53 gene was affected in both intestinal and diffuse histological types of gastric cancer.
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Affiliation(s)
- Rejane Mattar
- Department of Gastroenterology, Hospital das Clínicas, Faculty of Medicine, University of São Paulo, São Paulo, SP, Brazil.
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22
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Hewitt C, Wilson P, McGlinn E, MacFarlane G, Papageorgiou A, Woodwards RTM, Sloan P, Gollin SM, Paterson I, Parkinson KK, Read AP, Thakker N. DLC1 is unlikely to be a primary target for deletions on chromosome arm 8p22 in head and neck squamous cell carcinoma. Cancer Lett 2004; 209:207-13. [PMID: 15159023 DOI: 10.1016/j.canlet.2003.12.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2003] [Revised: 11/30/2003] [Accepted: 12/12/2003] [Indexed: 01/01/2023]
Abstract
Allelic imbalance on chromosome arm 8p is common in head and neck squamous cell carcinoma (HNSCC). DLC1, a tumour suppressor gene inactivated in liver carcinogenesis and encoding a Rho GTPase activating protein (RhoGAP) maps to one of the deleted regions (8p21.3-22). In order to determine whether inactivation of DLC1 is involved in HNSCC, we have screened tumour cell lines for DLC1 mutations and expression. Pathological mutations were not identified in any of the 17 cell lines tested. Seven polymorphisms were identified; 13 of the 17 of cell lines were homozygous for all seven polymorphisms compared to only 2 of 17 controls suggesting a loss of heterozygosity in a majority of the cell lines. DLC1 expression was observed in all 11 HNSCC cell lines tested, thus excluding the possibility of transcriptional silencing of DLC1 by promoter hypermethylation. Overall, our data suggest that hemizygous deletions of the DLC1 locus are frequent in HNSCCs but this gene is unlikely to be primary target for inactivation on this chromosomal arm.
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Affiliation(s)
- Chelsee Hewitt
- Unit of Medical Genetics, University of Manchester, St Mary's Hospital, Hathersage Road, Manchester M13 0JH, UK
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23
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Scholnick SB, Richter TM. The role of CSMD1 in head and neck carcinogenesis. Genes Chromosomes Cancer 2003; 38:281-3. [PMID: 14506705 DOI: 10.1002/gcc.10279] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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24
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Wilson P, Cuthbert A, Marsh A, Arnold J, Flanagan J, Mulford C, Trott D, Baker E, Purdie D, Newbold R, Chenevix-Trench G. Transfer of chromosome 8 into two breast cancer cell lines: total exclusion of three regions indicates location of putative in vitro growth suppressor genes. CANCER GENETICS AND CYTOGENETICS 2003; 143:100-12. [PMID: 12781443 DOI: 10.1016/s0165-4608(02)00850-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Loss of heterozygosity (LOH) of the short arm of chromosome 8 occurs frequently in breast tumors. Fine mapping of the smallest regions of overlap of the deletions indicates that multiple tumor suppressor genes may be located in this region. We have performed microcell-mediated chromosome transfer of chromosome 8 into two breast cancer cell lines, 21MT-1 and T-47D. Twenty-two of the resulting hybrids were characterized extensively with chromosome 8 microsatellite markers and a subset were assayed for growth in vitro and soft agar clonicity. There was no evidence in any of the hybrids for suppression of growth or clonicity that could be attributed to the presence of particular regions of chromosome 8; however, none of the 22 hybrids examined had taken up all of the donor chromosome 8, and in fact there were three regions that contained only one allele of the markers genotyped in all 22 hybrids. These results are consistent with the presence of suppressor genes on the short arm of chromosome 8 causing strong growth suppression that is incompatible with growth in vitro; that is, multiple suppressor genes may exist on the short arm of chromosome 8.
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Affiliation(s)
- Peter Wilson
- Queensland Institute of Medical Research, RBH Post Office, Herston, Brisbane, QLD 4029, Australia
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25
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Arnold JM, Woollatt E, Chenevix-Trench G. Chromosome 8 genetic analysis and phenotypic characterization of 21 ovarian cancer cell lines. CANCER GENETICS AND CYTOGENETICS 2002; 139:109-14. [PMID: 12550770 DOI: 10.1016/s0165-4608(02)00617-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The short arm of chromosome 8 undergoes frequent loss of heterozygosity (LOH) in ovarian adenocarcinomas. Fine mapping has identified several distinct critical regions within 8p which undergo rates of LOH of 50% or greater, suggesting that there may be more than one tumor suppressor gene located on this chromosome arm. In an effort to refine the location of these putative tumor suppressor genes by homozygosity-mapping-of-deletion analysis, we have analyzed 21 ovarian cancer cell lines with 19 polymorphic microsatellite markers from 8p. Eleven of the cell lines (55%) were homozygous at every marker, indicating loss of an entire 8p arm. No smaller extended regions of hemizygosity were identified. Refinement of these 8p target regions was therefore not possible, but this analysis did identify the ovarian cancer cell lines that would be most appropriate for microcell-mediated chromosome transfer to complement the hypothesized mutation in the target tumor suppressor gene(s) on 8p. The 11 cell lines that had undergone 8p LOH were therefore characterized for colony formation in soft agar and tumor formation in nude mice. We identified four cell lines (JAM, OVCA4, OVCA5, and OVCA8) that were hemizygous for 8p and that formed colonies in soft agar and tumors in nude mice, making them ideal cell lines for chromosome 8 or candidate gene transfer.
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Affiliation(s)
- Jeremy M Arnold
- The Queensland Institute of Medical Research, Queensland 4029, Hernston, Australia.
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26
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Wistuba II, Maitra A, Carrasco R, Tang M, Troncoso P, Minna JD, Gazdar AF. High resolution chromosome 3p, 8p, 9q and 22q allelotyping analysis in the pathogenesis of gallbladder carcinoma. Br J Cancer 2002; 87:432-40. [PMID: 12177780 PMCID: PMC2376134 DOI: 10.1038/sj.bjc.6600490] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2002] [Revised: 04/29/2002] [Accepted: 06/07/2002] [Indexed: 12/15/2022] Open
Abstract
Our recent genome-wide allelotyping analysis of gallbladder carcinoma identified 3p, 8p, 9q and 22q as chromosomal regions with frequent loss of heterozygosity. The present study was undertaken to more precisely identify the presence and location of regions of frequent allele loss involving those chromosomes in gallbladder carcinoma. Microdissected tissue from 24 gallbladder carcinoma were analysed for PCR-based loss of heterozygosity using 81 microsatellite markers spanning chromosome 3p (n=26), 8p (n=14), 9q (n=29) and 22q (n=12) regions. We also studied the role of those allele losses in gallbladder carcinoma pathogenesis by examining 45 microdissected normal and dysplastic gallbladder epithelia accompanying gallbladder carcinoma, using 17 microsatellite markers. Overall frequencies of loss of heterozygosity at 3p (100%), 8p (100%), 9q (88%), and 22q (92%) sites were very high in gallbladder carcinoma, and we identified 13 distinct regions undergoing frequent loss of heterozygosity in tumours. Allele losses were frequently detected in normal and dysplastic gallbladder epithelia. There was a progressive increase of the overall loss of heterozygosity frequency with increasing severity of histopathological changes. Allele losses were not random and followed a sequence. This study refines several distinct chromosome 3p, 8p, 9q and 22q regions undergoing frequent allele loss in gallbladder carcinoma that will aid in the positional identification of tumour suppressor genes involved in gallbladder carcinoma pathogenesis.
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Affiliation(s)
- I I Wistuba
- Department of Anatomic Pathology, Pontificia Universidad Catolica de Chile, Marcoleta 367, P.O. Box 114-D, Santiago, Chile.
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27
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Tornillo L, Carafa V, Sauter G, Moch H, Minola E, Gambacorta M, Vecchione R, Bianchi L, Terracciano LM. Chromosomal alterations in hepatocellular nodules by comparative genomic hybridization: high-grade dysplastic nodules represent early stages of hepatocellular carcinoma. J Transl Med 2002; 82:547-53. [PMID: 12003995 DOI: 10.1038/labinvest.3780449] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Data from experimental hepatocarcinogenesis and recent studies in humans have suggested that the emergence of hepatocellular carcinoma (HCC) is a stepwise process. However, despite abundant experimental data, the precise molecular mechanisms and genetic alterations involved in human liver carcinogenesis are still unclear. Comparative genomic hybridization was used to analyze 26 hepatocellular nodules obtained from patients undergoing liver transplantation or surgical resection for HCC. According to the criteria proposed by the International Working Party, 16 nodules were classified as multiacinar regenerative nodules (MRN), 4 as low-grade dysplastic nodules (LG-DN), and 6 as high-grade dysplastic nodules (HG-DN). Our aim was to investigate the possible genetic differences between MRN, LG-DN, and HG-DN. The whole group of nodules showed only a few aberrations (mean 1.1/case), without any significant pattern. This finding is comparable to what happens in non-neoplastic tissue. On the contrary, in three of six HG-DN, we found deletions of 8p and gains of 1q. LG-DN and MRN did not show these chromosomal imbalances. These results confirm the important role of allelic losses on 8p as well as of gains of 1q in HCC. We conclude that the genes that are important in early stages of hepatocarcinogenesis are probably located on these chromosomal arms.
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Affiliation(s)
- Luigi Tornillo
- Institute of Pathology, University of Basel, Basel, Switzerland
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28
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Yin XL, Pang JCS, Ng HK. Identification of a region of homozygous deletion on 8p22-23.1 in medulloblastoma. Oncogene 2002; 21:1461-8. [PMID: 11857089 DOI: 10.1038/sj.onc.1205204] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2001] [Revised: 11/09/2001] [Accepted: 11/27/2001] [Indexed: 12/22/2022]
Abstract
To identify critical tumor suppressor loci that are associated with the development of medulloblastoma, we performed a comprehensive genome-wide allelotype analysis in a series of 12 medulloblastomas. Non-random allelic imbalances were identified on chromosomes 7q (58.3%), 8p (66.7%), 16q (58.3%), 17p (58.3%) and 17q (66.7%). Comparative genomic hybridization analysis confirmed that allelic imbalances on 8p, 16q and 17p were due to loss of genetic materials. Finer deletion mapping in an expanded series of 23 medulloblastomas localized the common deletion region on 8p to an interval of 18.14 cM on 8p22-23.2. We then searched within the region of loss on 8p for loci that might contain homozygous deletion using comparative duplex PCR. An overlapping homozygous deletion region was identified in a 1.8 cM interval on 8p22-23.1, between markers D8S520 and D8S1130, in two medulloblastomas. This region of homozygous deletion also encompasses the 1.4 cM minimal deletion region detected on 8p in ductal carcinoma in situ of breast. In conclusion, we reported for the first time a detailed deletion mapping on 8p in medulloblastoma and have identified a region of homozygous deletion on 8p22-23.1 that is likely to contain a critical tumor suppressor gene involved in the development of medulloblastoma.
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Affiliation(s)
- Xiao-lu Yin
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, China
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29
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Abstract
Telomerase activity is critical for normal and transformed human cells to escape from crisis and is implicated in oncogenesis. Here we describe a novel Pin2/TRF1 binding protein, PinX1 that inhibits telomerase activity and affects tumorigenicity. PinX1 and its small TID domain bind the telomerase catalytic subunit hTERT and potently inhibit its activity. Overexpression of PinX1 or its TID domain inhibits telomerase activity, shortens telomeres, and induces crisis, whereas depletion of endogenous PinX1 increases telomerase activity and elongates telomeres. Depletion of PinX1 also increases tumorigenicity in nude mice, consistent with its chromosome localization at 8p23, a region with frequent loss of heterozygosity in a number of human cancers. Thus, PinX1 is a potent telomerase inhibitor and a putative tumor suppressor.
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Affiliation(s)
- X Z Zhou
- Cancer Biology Program, Division of Hematology/Oncology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, HIM 1047, Boston, MA 02215, USA
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30
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Jin Y, Jin C, Wennerberg J, Höglund M, Mertens F. Cytogenetic and fluorescence in situ hybridization characterization of chromosome 8 rearrangements in head and neck squamous cell carcinomas. CANCER GENETICS AND CYTOGENETICS 2001; 130:111-7. [PMID: 11675131 DOI: 10.1016/s0165-4608(01)00476-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Structural rearrangements of chromosome 8 are frequently encountered in squamous cell carcinomas of the head and neck (HNSCC). These aberrations often affect the centromeric region, resulting in the formation of isochromosome i(8q) and whole arm translocations. Some tumors may display structural rearrangements of 8p23. To characterize further the localization of the breakpoints in such rearrangements, 12 HNSCC known to carry pericentromeric rearrangements of chromosome 8 and 8p23 abnormalities were investigated with fluorescence in situ hybridization (FISH) by the use of 15 YAC clones spanning 8p23 and 8p11 to 8q11. FISH confirmed that all, except one, aberrations cytogenetically interpreted to be i(8q) were true, monocentric i(8q). Similarly, all whole-arm translocations appeared as centric fusions. It could thus be concluded that the essential outcome of these rearrangements is genomic imbalances and not rearrangement of genes in the pericentromeric region. By the use of five YAC clones mapping to 8p23, different breakpoints at the molecular level were disclosed in cases with cytogenetically identical 8p23 rearrangements. An evaluation of the genomic imbalances detected in the present series revealed that overrepresentation of 8q material was present in 11 of the 12 tumors. The most commonly gained segment was 8q22 approximately qter, found in all cases with 8q overrepresentation. Loss of parts of or the entire 8p was seen in 10 tumors. The smallest overlapping deleted region was localized to the subtelomeric region of 8p.
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Affiliation(s)
- Y Jin
- Department of Clinical Genetics, University Hospital, S-221 85, Lund, Sweden.
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31
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Pribill I, Speiser P, Leary J, Leodolter S, Hacker NF, Friedlander ML, Birnbaum D, Zeillinger R, Krainer M. High frequency of allelic imbalance at regions of chromosome arm 8p in ovarian carcinoma. CANCER GENETICS AND CYTOGENETICS 2001; 129:23-9. [PMID: 11520561 DOI: 10.1016/s0165-4608(01)00419-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Progressive genetic changes such as the inactivation of tumor suppressor genes (TSG) are thought to play an important role in the initiation and progression of ovarian cancer. Frequent nonrandom allelic imbalance (AI) at 8p11-p21 and 8p22-pter suggests the existence of TSGs that may be involved in the carcinogenesis of several human malignancies. We investigated 70 ovarian tumors with 11 highly polymorphic markers spanning 8p12-p21 and 8p22-pter to produce an AI map of 8p in epithelial ovarian cancer. Allelic imbalance was demonstrated in 54 tumors (77%), most frequently occurring at D8S136 (54%) and at D8S1992 (55%). Poorly differentiated and advanced stage cancers were more often affected by AI (G1+G2 vs. G3; 20% vs. 66%; stage I+II vs. III+IV, 36% vs. 54%, P<.001; Kruskal-Wallis test) than well differentiated and early stage tumors. There was no relationship between histological subtype and AI. Smallest regions of overlap (SRO) were delineated by analyzing 38 tumors with partial AI. This study provides compelling evidence for the involvement of TSGs on the short arm of chromosome 8, at 8p12-p21 and at 8p23 in the development and progression of epithelial ovarian cancer.
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Affiliation(s)
- I Pribill
- Department of Medicine I, Clinical Division of Oncology, University Hospital, Molecular Oncology Group, Währingergürtel 18-20, A-1090 Vienna, Austria
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Sun PC, Uppaluri R, Schmidt AP, Pashia ME, Quant EC, Sunwoo JB, Gollin SM, Scholnick SB. Transcript map of the 8p23 putative tumor suppressor region. Genomics 2001; 75:17-25. [PMID: 11472063 DOI: 10.1006/geno.2001.6587] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Cancers of the head and neck, prostate, liver, and bladder exhibit minimal regions of deletion within chromosomal band 8p23 that either overlap or map very close to one another. We previously refined a minimal region of deletion in squamous cell carcinomas to a 112-kb interval within 8p23. There seems to be only a single gene within this region that is expressed in normal upper aerodigestive tract epithelium. This candidate for the squamous cancer suppressor, CUB and sushi multiple domains-1 (CSMD1), extends into the minimal regions of deletions defined for the other types of cancer with 8p23 deletions. RT-PCR and EST data indicate that CSMD1 is also expressed in those organs,making this gene a candidate for a suppressor of multiple types of cancer. Both the sequence of the gene and the organization of the protein are highly conserved in the mouse.
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Affiliation(s)
- P C Sun
- Department of Otolaryngology, Head and Neck Surgery, Washington University School of Medicine, 517 South Euclid Avenue, St. Louis, Missouri 63110, USA
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33
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Bockmühl U, Ishwad CS, Ferrell RE, Gollin SM. Association of 8p23 deletions with poor survival in head and neck cancer. Otolaryngol Head Neck Surg 2001; 124:451-5. [PMID: 11283506 DOI: 10.1067/mhn.2001.114794] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVE Allelic loss at 8p23 occurs frequently in head and neck squamous cell carcinoma. The objective of this study was to determine the prognostic importance of 8p23 loss. STUDY DESIGN AND SETTINGS We tested 51 primary tumors and 19 lymph node metastases for loss of heterozygosity with 7 microsatellite polymorphisms at 8p23 and correlated the results with disease-free interval and disease-specific survival. RESULTS The Kaplan-Meier analysis demonstrated statistically significant association of 8p23 allelic loss with both shorter disease-free interval and disease-specific survival. For the pN stage, the log-rank test indicated significance in correlation with the disease-free interval, whereas the pT stage showed a significant correlation with disease-specific survival. Multivariate analysis identified loss of heterozygosity at 8p23 as independent prognostic marker for disease-free interval. CONCLUSION Our data suggest that 8p23 allelic loss is associated with poor prognosis in head and neck squamous cell carcinoma and could be useful refining diagnosis of these tumors.
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Affiliation(s)
- U Bockmühl
- Department of Otorhinolaryngology, Humboldt University, Berlin, Germany.
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34
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Abstract
BACKGROUND Cytogenetic alterations underlie the development of squamous cell carcinomas of the head and neck (SCCHN). Because many of the molecular genetic changes in SCCHN result from chromosomal alterations, a complete perspective on the genetic changes in tumors requires a basic introduction to cytogenetics. This review presents a brief description of the latest cytogenetic techniques and a description of chromosomal alterations in SCCHN, their molecular correlates, and clinical implications. RESULTS The most frequent cytogenetic alterations in SCCHN are gains of 3q, 8q, 9q, 20q, 7p, 11q13, and 5p and losses of 3p, 9p, 21q, 5q, 13q, 18q, and 8p. The karyotypes often provide an explanation for the mechanism by which the molecular genetic alterations arose. For example, the coordinate gains and losses involving whole arms of chromosomes 3, 5, 7, 8, and 9 often result from isochromosome formation. In addition, apparent allelic imbalances may not represent loss of heterozygosity but gene amplification. These results suggest that cytogenetic analysis is valuable for placing the molecular genetic findings in perspective at the cellular level. CONCLUSIONS Cytogenetic endpoints may be useful tools for dissecting clinical differences in tumor behavior and response to therapy. Numerous studies are underway to examine the biology of and genetic alterations in SCCHN that will lead to additional markers for use as rapid, noninvasive screening methods for individuals at high risk for primary or recurrent SCCHN. Our goal is to minimize morbidity and mortality from SCCHN by identifying useful predictors of disease and recurrence risk and response to therapy to implement earlier detection and more effective prevention and/or treatment strategies.
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Affiliation(s)
- S M Gollin
- Department of Human Genetics, University of Pittsburgh Graduate School of Public Health, University of Pittsburgh, Pennsylvania 15261, USA.
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Marchio A, Pineau P, Meddeb M, Terris B, Tiollais P, Bernheim A, Dejean A. Distinct chromosomal abnormality pattern in primary liver cancer of non-B, non-C patients. Oncogene 2000; 19:3733-8. [PMID: 10949927 DOI: 10.1038/sj.onc.1203713] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
To discriminate among the chromosomal abnormalities associated with the etiology of hepatocellular carcinoma (HCC), we performed a comparative genomic hybridization (CGH) analysis on 34 HCCs resected on non-cirrhotic livers from patients serologically negative for both hepatitis B (HBV) and C (HCV) viruses. The results were compared to those of a previous analysis of 50 HCCs selected on the basis of their positivity for HBV infection. The majority of the abnormalities found in the HBV positive cases (losses of chromosome arms 1p, 8p, 6q, 13q and 14q and gains of 1q, 8q, 6p and 17q) were similarly detected in the virus negative specimens. In contrast, a significant decrease (40% on average) was observed for losses at 4q, 16q and 17p in non-viral HCC samples, suggesting that these abnormalities are tightly associated with HBV infection. Thus, in addition to a common pathway towards malignancy, a subset of alterations may preferentially contribute to virus-induced carcinogenesis. In a parallel CGH study of 10 fibrolamellar carcinomas, a rare subtype of HCC, we found in six out of the seven informative cases, gains of chromosome arm 1q. This region, which is also preferentially amplified in non fibrolamellar tumors (58%), may contain an essential proto-oncogene commonly implicated in liver carcinogenesis.
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Affiliation(s)
- A Marchio
- Unité de Recombinaison et Expression Génétique, INSERM U163, Institut Pasteur, Paris, France
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36
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Muscheck M, Sükösd F, Pesti T, Kovacs G. High density deletion mapping of bladder cancer localizes the putative tumor suppressor gene between loci D8S504 and D8S264 at chromosome 8p23.3. J Transl Med 2000; 80:1089-93. [PMID: 10908154 DOI: 10.1038/labinvest.3780114] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Deletion of chromosome 8p is associated with the progression of bladder cancer. To identify the putative tumor suppressor gene locus we have analyzed 145 bladder cancers with 12 microsatellite markers for allelic changes at the chromosome 8p23.3 region. We mapped the smallest overlapping deletion to approximately 0.7 cM genetic distance between loci D8S504 and D8S264. Allelic changes at this region occurred in 75 (52%) of the 145 tumors. We found a significant correlation between alterations at chromosome 8p23.3 and the tumor grade. The correlation between genetic changes and tumor stage reflected the distribution of tumors of different grades in each pathologic stage.
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Affiliation(s)
- M Muscheck
- Department of Urology, Ruprecht-Karls-University, Heidelberg, Germany
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37
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38
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Wilson PJ, McGlinn E, Marsh A, Evans T, Arnold J, Wright K, Biden K, Young J, Wainwright B, Wicking C, Chenevix-Trench G. Sequence variants of DLC1 in colorectal and ovarian tumours. Hum Mutat 2000; 15:156-65. [PMID: 10649492 DOI: 10.1002/(sici)1098-1004(200002)15:2<156::aid-humu4>3.0.co;2-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Loss of heterozygosity occurs frequently on the short arm of chromosome 8 in many neoplasms, including colorectal and ovarian cancer. Monochromosome transfer experiments into colorectal tumour cell lines have provided functional evidence for a tumour suppressor gene located at 8p22-23. One of the genes from this region that is expressed by our suppressed hybrids is a candidate tumour suppressor gene, DLC1 (deleted in liver cancer), which has homology to rat RhoGAP. We have delineated the structure of the DLC1 gene and used single-stranded conformation polymorphism analysis (SSCP) to look for sequence variants in 126 colorectal and 33 ovarian primary tumours and cell lines. One exonic missense mutation and three intronic insertions/deletions were identified in primary colorectal tumours, as well as many polymorphisms present in germline DNAs. The rarity of exonic missense mutations, and the absence of protein-truncating mutations, indicates that DLC1 is not the target of 8p LOH in colorectal or ovarian tumours. The delineation of the gene structure allows mutation analysis of DLC1 in other tumour types for which it remains a candidate tumour suppressor gene based on its location and homology to rhoGAP.
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Affiliation(s)
- P J Wilson
- Joint Experimental Oncology Programme, The Queensland Institute of Medical Research and the University of Queensland, Brisbane, Australia.
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Sun PC, Schmidt AP, Pashia ME, Sunwoo JB, Scholnick SB. Homozygous deletions define a region of 8p23.2 containing a putative tumor suppressor gene. Genomics 1999; 62:184-8. [PMID: 10610711 DOI: 10.1006/geno.1999.6020] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Loss of heterozygosity at microsatellite loci in chromosomal band 8p23.2 is a frequent event in squamous cell carcinomas of the head and neck, suggesting that this region contains a putative tumor suppressor. Allelic loss studies on laryngeal and oral/oropharyngeal tumors have restricted the size of this region to approximately 1 cM. A similar pattern of deletions is also observed in prostatic and ovarian adenocarcinomas. As part of an effort to identify this gene by positional cloning, we developed a physical contig consisting of 12 overlapping bacterial artificial chromosome (BAC) clones spanning this interval. We developed sequence-tagged sites from the ends of these BACs and used them, along with seven microsatellite loci, to detect and map homozygous deletions in four head and neck squamous cancer cell lines. Our mapping analysis further restricted the consensus minimal region of deletion to a <191-kb interval.
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Affiliation(s)
- P C Sun
- Department of Otolaryngology-Head and Neck Surgery, Washington University School of Medicine, St. Louis, Missouri 63110, USA
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40
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Wang JC, Radford DM, Holt MS, Helms C, Goate A, Brandt W, Parik M, Phillips NJ, DeSchryver K, Schuh ME, Fair KL, Ritter JH, Marshall P, Donis-Keller H. Sequence-ready contig for the 1.4-cM ductal carcinoma in situ loss of heterozygosity region on chromosome 8p22-p23. Genomics 1999; 60:1-11. [PMID: 10458905 DOI: 10.1006/geno.1999.5905] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We report the construction of an approximately 1.7-Mb sequence-ready YAC/BAC clone contig of 8p22-p23. This chromosomal region has been associated with frequent loss of heterozygosity (LOH) in breast, ovarian, prostate, head and neck, and liver cancer. We first constructed a meiotic linkage map for 8p to resolve previously reported conflicting map orders from the literature. The target region containing a putative tumor suppressor gene was defined by allelotyping 65 cases of sporadic ductal carcinoma in situ with 18 polymorphic markers from 8p. The minimal region of loss encompassed the interval between D8S520 and D8S261, and one tumor had loss of D8S550 only. We chose to begin physical mapping of this minimal LOH region by concentrating on the distal end, which includes D8S550. A fine-structure radiation hybrid map for the region that extends from D8S520 (distal) to D8S1759 (proximal) was prepared, followed by construction of a single, integrated YAC/BAC contig for the interval. The approximately 1730-kb contig consists of 13 YACs and 27 BACs. Fifty-four sequence-tagged sites (STSs) developed from BAC insert end-sequences and 11 expressed sequence tags were localized within the contig by STS content mapping. In addition, four unique cDNA clones from the region were isolated and fully sequenced. This integrated YAC/BAC resource provides the starting point for transcription mapping, genomic sequencing, and positional cloning of this region.
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Affiliation(s)
- J C Wang
- Division of Human Molecular Genetics, Washington University School of Medicine, St. Louis, Missouri, 63110, USA
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