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Guimarães LM, Diniz MG, Rogatto SR, Gomez RS, Gomes CC. The genetic basis of oral leukoplakia and its key role in understanding oral carcinogenesis. J Oral Pathol Med 2020; 50:632-638. [PMID: 33217066 DOI: 10.1111/jop.13140] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 09/22/2020] [Revised: 09/25/2020] [Accepted: 09/28/2020] [Indexed: 12/23/2022]
Abstract
Oral leukoplakia (OL) is the most common oral potentially malignant disorder, with a global prevalence of 2%-3%, variable malignant transformation rate and incompletely understood aetiology. Considering the subjectivity in oral dysplasia grading, other evaluation methods have been tested as predictors of malignant transformation. DNA ploidy status and loss of heterozygosity signatures have been shown to be good predictive markers of malignant transformation. However, effective markers to predict which lesions will progress to invasive carcinoma and by which mechanisms remain unclear. Recent evidence suggests that dysplasia progression to carcinoma occurs through neutral clonal evolution (i.e. randomly). We focus on the genetic basis of OL, encompassing the gross chromosomal alterations and single-gene mutations, and discuss such alterations in the context of aetiology, clinical presentation and progression. The deeper we understand the genetic basis of OL, the more we approach a better comprehension of the complex and poorly understood process of oral carcinogenesis.
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Affiliation(s)
- Letícia Martins Guimarães
- Department of Pathology, Biological Sciences Institute, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Marina Gonçalves Diniz
- Department of Pathology, Biological Sciences Institute, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Sílvia Regina Rogatto
- Department of Clinical Genetics, Vejle University Hospital, Institute of Regional Health Research, University of Southern Denmark, Vejle, Denmark
| | - Ricardo Santiago Gomez
- Department of Oral Surgery and Pathology, Faculty of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Carolina Cavalieri Gomes
- Department of Pathology, Biological Sciences Institute, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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2
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Santiago KM, Castro LP, Neto JPD, de Nóbrega AF, Pinto CAL, Ashton-Prolla P, Pinto E Vairo F, de Medeiros PFV, Ribeiro EM, Ribeiro BFR, do Valle FF, Doriqui MJR, Leite CHB, Rocha RM, Moura LMS, Munford V, Galante PAF, Menck CFM, Rogatto SR, Achatz MI. Comprehensive germline mutation analysis and clinical profile in a large cohort of Brazilian xeroderma pigmentosum patients. J Eur Acad Dermatol Venereol 2020; 34:2392-2401. [PMID: 32239545 DOI: 10.1111/jdv.16405] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 03/05/2020] [Indexed: 12/21/2022]
Abstract
BACKGROUND Xeroderma pigmentosum (XP) patients present a high risk of developing skin cancer and other complications at an early age. This disease is characterized by mutations in the genes related to the DNA repair system. OBJECTIVES To describe the clinical and molecular findings in a cohort of 32 Brazilian individuals who received a clinical diagnosis of XP. METHODS Twenty-seven families were screened for germline variants in eight XP-related genes. RESULTS All patients (N = 32) were diagnosed with bi-allelic germline pathogenic or potentially pathogenic variants, including nine variants previously undescribed. The c.2251-1G>C XPC pathogenic variant, reported as the founder mutation in Comorian and Pakistani patients, was observed in 15 cases in homozygous or compound heterozygous. Seven homozygous patients for POLH/XPV variants developed their symptoms by an average age of 7.7 years. ERCC2/XPD, DDB2/XPE and ERCC5/XPG variants were found in a few patients. Aside from melanoma and non-melanoma skin tumours, a set of patients developed skin sebaceous carcinoma, leiomyosarcoma, angiosarcoma, mucoepidermoid carcinoma, gastric adenocarcinoma and serous ovarian carcinoma. CONCLUSIONS We reported a high frequency of XPC variants in 32 XP Brazilian patients. Nine new variants in XP-related genes, unexpected non-skin cancer lesions and an anticipation of the clinical manifestation in POLH/XPV cases were also described.
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Affiliation(s)
- K M Santiago
- Department of Oncogenetics, A.C.Camargo Cancer Center, São Paulo, São Paulo, Brazil.,International Research Center (CIPE), A.C.Camargo Cancer Center, São Paulo, São Paulo, Brazil
| | - L P Castro
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, São Paulo, São Paulo, Brazil
| | - J P D Neto
- Department of Skin Cancer, A.C.Camargo Cancer Center, São Paulo, São Paulo, Brazil
| | - A F de Nóbrega
- Department of Oncogenetics, A.C.Camargo Cancer Center, São Paulo, São Paulo, Brazil.,International Research Center (CIPE), A.C.Camargo Cancer Center, São Paulo, São Paulo, Brazil
| | - C A L Pinto
- Department of Pathology, A.C.Camargo Cancer Center, São Paulo, São Paulo, Brazil
| | - P Ashton-Prolla
- Medical Genetics Service, Hospital de Clínicas de Porto Alegre, Porto Alegre, Rio Grande do Sul, Brazil.,Department of Genetics, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - F Pinto E Vairo
- Center for Individualized Medicine and Department of Clinical Genomics, Mayo Clinic, Rochester, MN, USA
| | - P F V de Medeiros
- University Hospital Alcides Carneiro, Federal University of Campina Grande, Campina Grande, Paraíba, Brazil
| | - E M Ribeiro
- Associação Cearense de Doenças Genéticas, Fortaleza, Ceará, Brazil
| | - B F R Ribeiro
- Children's Hospital, Secretaria de Estado de Saúde do Acre, Rio Branco, Acre, Brazil
| | - F F do Valle
- Amazonas Federal University, Manaus, Amazonas, Brazil
| | - M J R Doriqui
- Hospital Infantil Dr Juvêncio Mattos, São Luís, Maranhão, Brazil
| | - C H B Leite
- Department of Radiation Oncology, Instituto do Câncer do Ceará, Fortaleza, Ceará, Brazil
| | - R M Rocha
- Gynecology Department, Paulista Medicine School, Federal University of São Paulo (UNIFESP), São Paulo, São Paulo, Brazil
| | - L M S Moura
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, São Paulo, São Paulo, Brazil
| | - V Munford
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, São Paulo, São Paulo, Brazil
| | - P A F Galante
- Molecular Oncology Center, Hospital Sírio-Libanês, São Paulo, São Paulo, Brazil
| | - C F M Menck
- Department of Microbiology, Institute of Biomedical Sciences, University of Sao Paulo, São Paulo, São Paulo, Brazil
| | - S R Rogatto
- Department of Clinical Genetics, University Hospital, Institute of Regional Health Research, University of Southern Denmark, Vejle, Denmark
| | - M I Achatz
- Centro de Oncologia, Hospital Sírio-Libanês, São Paulo, São Paulo, Brazil
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3
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Mello JBH, Barros-Filho MC, Abreu FB, Cirilo PDR, Domingues MAC, Pontes A, Rogatto SR. MicroRNAs involved in the HMGA2 deregulation and its co-occurrence with MED12 mutation in uterine leiomyoma. Mol Hum Reprod 2019; 24:556-563. [PMID: 30376129 DOI: 10.1093/molehr/gay037] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 08/21/2018] [Indexed: 12/13/2022] Open
Abstract
STUDY QUESTION Can the mediator complex subunit 12 (MED12) mutation and high mobility group AT-hook 2 (HMGA2) overexpression co-occurrence be explained by the alternative mechanism of HMGA2 dysregulation in uterine leiomyomas (UL)? SUMMARY ANSWER The co-occurrence of MED12 mutation and HMGA2 overexpression, and a negative correlation of five validated or predicted microRNAs that target HMGA2 were reported. WHAT IS KNOWN ALREADY The recent stratification of UL, according to recurrent and mutually exclusive genomic alterations affecting HMGA2, MED12, fumarate hydratase (FH) and collagen type IV alpha 5-alpha 6 (COL4A5-COL4A6) pointed out the involvement of distinct molecular pathways. However, the mechanisms of regulation involving these drivers are poorly explored. STUDY DESIGN, SIZE, DURATION A total of 78 UL and 34 adjacent normal myometrium (NM) tissues was collected from 56 patients who underwent hysterectomies at a single institution. The patients were treated at the Department of Gynecology and Obstetrics, School of Medicine, Sao Paulo State University, Botucatu, SP, Brazil, from October 1995 to February 2004. PARTICIPANTS/MATERIALS, SETTING, METHODS Gene expression profiling was evaluated from fresh frozen tissues and compared with MED12 mutations at exon 2. In addition, RT-qPCR was applied to evaluate the expression levels of HMGA2 and their predictive miRNA regulators: hsa-let-7a, miR-26a, miR-26b, mir-93 and mir-106b. MAIN RESULTS AND THE ROLE OF CHANCE An unsupervised hierarchical clustering analysis revealed two main clusters with one of them (26 of 42 UL) showing an enrichment of MED12 mutated cases (18 of 26 UL). Increased expression levels of HMGA2 were observed in both clusters, including cases with MED12 mutation (cluster 1:18 UL). A significant HMGA2 overexpression (P < 0.001) in UL in comparison with NM was found. Five miRNAs predicted to regulate HMGA2 were significantly downregulated (P < 0.001) and negatively correlated to HMGA2 expression levels (P < 0.05) in UL. LIMITATIONS REASONS FOR CAUTION An in vivo functional study was not performed to validate the microRNAs and HMGA2 interaction due to technical limitations. WIDER IMPLICATIONS OF THE FINDINGS HMGA2 overexpression was detected in a significant number of MED12 mutated ULs, suggesting that these alterations coexist. Furthermore, five miRNAs were described as potential regulators of HMGA2 expression in UL. LARGE-SCALE DATA Data available in the Gene Expression Omnibus GSE42939. STUDY FUNDING AND COMPETING INTEREST(S) This study was supported by grants from Fundação de Amparo a Pesquisa do Estado de São Paulo (# 2008/58835-2) and Conselho Nacional de Pesquisa (# 485032/2007-4), Brazil. The authors declared having no conflicts of interest.
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Affiliation(s)
- J B H Mello
- CIPE-International Research Center-AC Camargo Cancer Center, Sao Paulo, SP, Brazil
| | - M C Barros-Filho
- CIPE-International Research Center-AC Camargo Cancer Center, Sao Paulo, SP, Brazil
| | - F B Abreu
- Department of Pathology and Laboratory Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
| | - P D R Cirilo
- Hermes Pardini Institute, Research & Development Department, Belo Horizonte, MG, Brazil
| | - M A C Domingues
- Department of Pathology, School of Medicine, University of Sao Paulo State-UNESP, Botucatu-SP, Brazil
| | - A Pontes
- Department of Gynecology and Obstetrics, School of Medicine, University of Sao Paulo State-UNESP, Botucatu-SP, Brazil
| | - S R Rogatto
- Department of Clinical Genetics, Vejle Hospital, Institute of Regional Health Research, University of Southern Denmark, DK, Denmark
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4
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Fortes FP, Kuasne H, Marchi FA, Miranda PM, Rogatto SR, Achatz MI. DNA methylation patterns of candidate genes regulated by thymine DNA glycosylase in patients with TP53 germline mutations. ACTA ACUST UNITED AC 2015; 48:610-5. [PMID: 25945745 PMCID: PMC4512099 DOI: 10.1590/1414-431x20154026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Accepted: 02/05/2015] [Indexed: 01/07/2023]
Abstract
Li-Fraumeni syndrome (LFS) is a rare, autosomal dominant, hereditary cancer predisposition disorder. In Brazil, the p.R337H TP53 founder mutation causes the variant form of LFS, Li-Fraumeni-like syndrome. The occurrence of cancer and age of disease onset are known to vary, even in patients carrying the same mutation, and several mechanisms such as genetic and epigenetic alterations may be involved in this variability. However, the extent of involvement of such events has not been clarified. It is well established that p53 regulates several pathways, including the thymine DNA glycosylase (TDG) pathway, which regulates the DNA methylation of several genes. This study aimed to identify the DNA methylation pattern of genes potentially related to the TDG pathway (CDKN2A, FOXA1, HOXD8, OCT4, SOX2, and SOX17) in 30 patients with germline TP53 mutations, 10 patients with wild-type TP53, and 10 healthy individuals. We also evaluated TDG expression in patients with adrenocortical tumors (ADR) with and without the p.R337H TP53 mutation. Gene methylation patterns of peripheral blood DNA samples assessed by pyrosequencing revealed no significant differences between the three groups. However, increased TDG expression was observed by quantitative reverse transcription PCR in p.R337H carriers with ADR. Considering the rarity of this phenotype and the relevance of these findings, further studies using a larger sample set are necessary to confirm our results.
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Affiliation(s)
- F P Fortes
- CIPE, Laboratrio de Oncogentica Molecular, A.C. Camargo Cancer Center, São Paulo, SP, Brasil
| | - H Kuasne
- CIPE, Laboratrio NeoGene, A.C. Camargo Cancer Center, São Paulo, SP, Brasil
| | - F A Marchi
- CIPE, Laboratrio NeoGene, A.C. Camargo Cancer Center, São Paulo, SP, Brasil
| | - P M Miranda
- CIPE, Laboratrio NeoGene, A.C. Camargo Cancer Center, São Paulo, SP, Brasil
| | - S R Rogatto
- CIPE, Laboratrio NeoGene, A.C. Camargo Cancer Center, São Paulo, SP, Brasil
| | - M I Achatz
- CIPE, Laboratrio de Oncogentica Molecular, A.C. Camargo Cancer Center, São Paulo, SP, Brasil
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5
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Sales KU, Friis S, Konkel JE, Godiksen S, Hatakeyama M, Hansen KK, Rogatto SR, Szabo R, Vogel LK, Chen W, Gutkind JS, Bugge TH. Non-hematopoietic PAR-2 is essential for matriptase-driven pre-malignant progression and potentiation of ras-mediated squamous cell carcinogenesis. Oncogene 2014; 34:346-56. [PMID: 24469043 PMCID: PMC4112178 DOI: 10.1038/onc.2013.563] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 12/06/2013] [Accepted: 12/10/2013] [Indexed: 01/27/2023]
Abstract
The membrane-anchored serine protease, matriptase, is consistently dysregulated in a range of human carcinomas, and high matriptase activity correlates with poor prognosis. Furthermore, matriptase is unique among tumor-associated proteases in that epithelial stem cell expression of the protease suffices to induce malignant transformation. Here, we use genetic epistasis analysis to identify proteinase-activated receptor (PAR)-2-dependent inflammatory signaling as an essential component of matriptase-mediated oncogenesis. In cell-based assays, matriptase was a potent activator of PAR-2, and PAR-2 activation by matriptase caused robust induction of nuclear factor (NF)κB through Gαi. Importantly, genetic elimination of PAR-2 from mice completely prevented matriptase-induced pre-malignant progression, including inflammatory cytokine production, inflammatory cell recruitment, epidermal hyperplasia and dermal fibrosis. Selective ablation of PAR-2 from bone marrow-derived cells did not prevent matriptase-driven pre-malignant progression, indicating that matriptase activates keratinocyte stem cell PAR-2 to elicit its pro-inflammatory and pro-tumorigenic effects. When combined with previous studies, our data suggest that dual induction of PAR-2-NFκB inflammatory signaling and PI3K-Akt-mTor survival/proliferative signaling underlies the transforming potential of matriptase and may contribute to pro-tumorigenic signaling in human epithelial carcinogenesis.
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Affiliation(s)
- K U Sales
- 1] Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA [2] Clinical Research Core, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - S Friis
- 1] Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA [2] Department of Cellular and Molecular Medicine, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen, Denmark
| | - J E Konkel
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - S Godiksen
- 1] Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA [2] Department of Cellular and Molecular Medicine, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen, Denmark [3] Department of Biology, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - M Hatakeyama
- 1] Department of Urology, Faculty of Medicine, Sao Paulo State University (UNESP), Botucatu, Sao Paulo, Brazil [2] AC Camargo Cancer Center, Sao Paulo, Brazil
| | - K K Hansen
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - S R Rogatto
- 1] Department of Urology, Faculty of Medicine, Sao Paulo State University (UNESP), Botucatu, Sao Paulo, Brazil [2] AC Camargo Cancer Center, Sao Paulo, Brazil
| | - R Szabo
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - L K Vogel
- Department of Cellular and Molecular Medicine, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen, Denmark
| | - W Chen
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - J S Gutkind
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
| | - T H Bugge
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD, USA
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6
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Bueno RC, Canevari RA, Villacis RAR, Domingues MAC, Caldeira JRF, Rocha RM, Drigo SA, Rogatto SR. ATM down-regulation is associated with poor prognosis in sporadic breast carcinomas. Ann Oncol 2013; 25:69-75. [PMID: 24285016 DOI: 10.1093/annonc/mdt421] [Citation(s) in RCA: 42] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Ataxia telangiectasia-mutated (ATM) gene downexpression has been reported in sporadic breast carcinomas (BC); however, the prognostic value and mechanisms of ATM deregulation remain unclear. PATIENTS AND METHODS ATM and miRNAs (miR-26a, miR-26b, miR-203, miR-421, miR-664, miR-576-5p and miR-18a) expression levels were evaluated by quantitative real-time PCR (RT-qPCR) in 52 BC and 3 normal breast samples. ATM protein expression was assessed by immunohistochemistry in 968 BC and 35 adjacent normal breast tissues. ATM copy number alteration was detected by array comparative genomic hybridization (aCGH) in 42 tumours. RESULTS Low ATM levels were associated with tumour grade. Absence of ATM protein expression was associated with distant metastasis (P < 0.001), reduced disease-free survival (DFS, P < 0.001) and cancer-specific survival (CSS, P < 0.001). Multivariate analysis indicated ATM protein expression as an independent prognostic marker for DFS (P = 0.001, HR = 0.579) and CSS (P = 0.001, HR = 0.554). ATM copy number loss was detected in 12% of tumours and associated with lower mRNA levels. miR-421 over-expression was detected in 36.5% of cases which exhibit lower ATM transcript levels (P = 0.075, r = -0.249). CONCLUSIONS The data suggest that ATM protein expression is an independent prognostic marker in sporadic BC. Gene copy number loss and miR-421 over-expression may be involved in ATM deregulation in BC.
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Affiliation(s)
- R C Bueno
- NeoGene Laboratory, Department of Urology, São Paulo State University, Botucatu
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7
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Rosa FE, Santos RM, Rogatto SR, Domingues MAC. Chromogenic in situ hybridization compared with other approaches to evaluate HER2/neu status in breast carcinomas. Braz J Med Biol Res 2013; 46:207-16. [PMID: 23558859 PMCID: PMC3854374 DOI: 10.1590/1414-431x20132483] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Accepted: 12/03/2012] [Indexed: 12/12/2022] Open
Abstract
Human epidermal growth factor receptor 2 (HER2) has been evaluated in breast
cancer patients to identify those most likely to benefit from herceptin-targeted
therapy. HER2 amplification, detected in 20-30% of invasive breast tumors, is
associated with reduced survival and metastasis. The most frequently used
technique for evaluating HER2 protein status as a routine procedure is
immunohistochemistry (IHC). HER2 copy number alterations have
also been evaluated by fluorescence in situ hybridization
(FISH) in moderate immunoexpression (IHC 2+) cases. An alternative procedure to
evaluate gene amplification is chromogenic in situ
hybridization (CISH), which has some advantages over FISH, including the
correlation between HER2 status and morphological features.
Other methodologies have also been used, such as silver-enhanced in
situ hybridization (SISH) and quantitative real-time RT-PCR, to
determine the number of HER2 gene copies and expression,
respectively. Here we will present a short and comprehensive review of the
current advances concerning HER2 evaluation in human breast
cancer.
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Affiliation(s)
- F E Rosa
- Departamento de Patologia, Hospital das Clínicas, Faculdade de Medicina, Universidade Estadual Paulista, Botucatu, SP, Brasil.
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8
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Veiga LCS, Bérgamo NA, Reis PP, Kowalski LP, Rogatto SR. Loss of Y-chromosome does not correlate with age at onset of head and neck carcinoma: a case-control study. Braz J Med Biol Res 2012; 45:172-8. [PMID: 22249426 PMCID: PMC3854262 DOI: 10.1590/s0100-879x2012007500004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2011] [Accepted: 12/20/2011] [Indexed: 11/22/2022] Open
Abstract
Loss of Y-chromosome has been correlated with older age in males. Furthermore, current evidence indicates that Y-chromosome loss also occurs in several human tumors, including head and neck carcinomas. However, the association between Y nullisomy and the occurrence of neoplasias in elderly men has not been well established. In the present study, the association between Y-chromosome loss and head and neck carcinomas was evaluated by comparison to cells from peripheral blood lymphocytes and normal mucosa of cancer-free individuals matched for age using dual-color fluorescence in situ hybridization. Twenty-one patients ranging in age from 28 to 68 years were divided into five-year groups for comparison with 16 cancer-free individuals matched for age. The medical records of all patients were examined to obtain clinical and histopathological data. None of the patients had undergone radiotherapy or chemotherapy before surgery. In all groups, the frequency of Y-chromosome loss was higher among patients than among normal reference subjects (P < 0.0001) and was not age-dependent. These data suggest that Y-chromosome loss is a tumor-specific alteration not associated with advanced age in head and neck carcinomas.
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Affiliation(s)
- L C Silva Veiga
- Departamento de Genética, Instituto de Biociências, Universidade Estadual Paulista, Botucatu, SP, Brasil
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9
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Rodrigues MMP, Rema A, Gärtner F, Soares FA, Rogatto SR, De Mour VMBD, Laufer-Amorim R. Overexpression of vimentin in canine prostatic carcinoma. J Comp Pathol 2010; 144:308-11. [PMID: 20961558 DOI: 10.1016/j.jcpa.2010.08.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Revised: 06/29/2010] [Accepted: 08/30/2010] [Indexed: 10/18/2022]
Abstract
Canine prostatic tumours exhibit similarities to those of man and may represent a useful model system to explore the mechanisms of cancer progression. Tumour progression to malignancy requires a change from an epithelial phenotype to a fibroblastic or mesenchymal phenotype. Vimentin expression is associated with the invasive phenotype of human prostate cancer cells. The aim of the present study was to characterize immunohistochemically the expression of vimentin by canine prostatic carcinomas. Primary carcinomas and metastatic tumour foci both showed vimentin expression. This finding suggests that the acquisition of the epithelial-mesenchymal transition phenotype in canine prostatic carcinoma may be characterized by the presence of mesenchymal intermediate filament (vimentin) that could lead to a higher likelihood of metastasis.
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Affiliation(s)
- M M P Rodrigues
- Department of Clinical Veterinary Medicine, São Paulo State University (UNESP), Botucatu, Brazil
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10
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Paiva CE, Drigo SA, Rosa FE, Moraes Neto FA, Caldeira JRF, Soares FA, Domingues MAC, Rogatto SR. Absence of transforming growth factor-beta type II receptor is associated with poorer prognosis in HER2-negative breast tumours. Ann Oncol 2009; 21:734-740. [PMID: 19914962 DOI: 10.1093/annonc/mdp518] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND The clinical relevance of transforming growth factor-beta (TGF-beta)-signalling pathway in breast carcinomas (BCs) remained elusive. This study aimed to evaluate the prognostic value of TGF-beta1 and transforming growth factor-beta type II receptor (TGF-betaRII) expression levels in tumour cells and their association with the established biomarkers in BC. PATIENTS AND METHODS In 324 BC from patients with long-term follow-up, the TGF-beta1 and TGF-betaRII transcript and protein expression levels were assessed. RESULTS TGF-beta1 and TGF-betaRII down-expression was significantly associated with BC. Negative TGF-beta1 and TGF-betaRII protein status was associated with the development of distant metastasis (P = 0.003 and P = 0.029, respectively). In multivariate analysis, TGF-beta1-positive tumours were associated with increased disease-free survival (DFS) [hazard ratio (HR) = 0.489, P = 0.003]. TGF-betaRII positivity was an independent prognostic factor for DFS (HR = 0.439, P = 0.001) and overall survival (OS) (HR = 0.409, P = 0.003) in human epidermal growth factor receptor-2 (HER2)-negative patients. Absence of TGF-beta1 and TGF-betaRII proteins in breast tumour cells was significantly associated with metastasis development. CONCLUSIONS To the best of our knowledge, this is the first report indicating the relevance of HER2 status in discriminating TGF-betaRII as a prognostic marker for DFS and OS in human BC. These data indicate that TGF-betaRII protein analysis in tumour cells could be introduced in clinical practice as additional prognostic biomarker in HER2-negative BC.
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Affiliation(s)
- C E Paiva
- Oncological and Hemato-oncological Center, São Paulo State University, Botucatu
| | - S A Drigo
- NeoGene Laboratory, Department of Urology, São Paulo State University, Botucatu and A. C. Camargo Cancer Treatment and Research Center
| | - F E Rosa
- NeoGene Laboratory, Department of Urology, São Paulo State University, Botucatu and A. C. Camargo Cancer Treatment and Research Center
| | | | | | - F A Soares
- Department of Pathology, A. C. Camargo Cancer Treatment and Research Center
| | - M A C Domingues
- Department of Pathology, São Paulo State University, Botucatu, São Paulo, Brazil
| | - S R Rogatto
- NeoGene Laboratory, Department of Urology, São Paulo State University, Botucatu and A. C. Camargo Cancer Treatment and Research Center.
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Abreu e Lima RS, Baruffi MR, de Lima ASG, de Oliveira FM, de Figueiredo-Pontes LL, Tone LG, Rogatto SR, Falcao RP, Ferrari Chauffaille MDLL, Rego EM. The co-expression of PML/RAR alpha and AML1/ETO fusion genes is associated with ATRA resistance. Br J Haematol 2005; 128:407-9. [PMID: 15667548 DOI: 10.1111/j.1365-2141.2004.05343.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Bérgamo NA, da Silva Veiga LC, dos Reis PP, Nishimoto IN, Magrin J, Kowalski LP, Squire JA, Rogatto SR. Classic and molecular cytogenetic analyses reveal chromosomal gains and losses correlated with survival in head and neck cancer patients. Clin Cancer Res 2005; 11:621-31. [PMID: 15701849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
PURPOSE Genetic biomarkers of head and neck tumors could be useful for distinguishing among patients with similar clinical and histopathologic characteristics but having differential probabilities of survival. The purpose of this study was to investigate chromosomal alterations in head and neck carcinomas and to correlate the results with clinical and epidemiologic variables. EXPERIMENTAL DESIGN Cytogenetic analysis of short-term cultures from 64 primary untreated head and neck squamous cell carcinomas was used to determine the overall pattern of chromosome aberrations. A representative subset of tumors was analyzed in detail by spectral karyotyping and/or confirmatory fluorescence in situ hybridization analysis. RESULTS Recurrent losses of chromosomes Y (26 cases) and 19 (14 cases), and gains of chromosomes 22 (23 cases), 8 and 20 (11 cases each) were observed. The most frequent structural aberration was del(22)(q13.1) followed by rearrangements involving 6q and 12p. The presence of specific cytogenetic aberrations was found to correlate significantly with an unfavorable outcome. There was a significant association between survival and gains in chromosomes 10 (P = 0.008) and 20 (P = 0.002) and losses of chromosomes 15 (P = 0.005) and 22 (P = 0.021). Univariate analysis indicated that acquisition of monosomy 17 was a significant (P = 0.0012) factor for patients with a previous family history of cancer. CONCLUSIONS The significant associations found in this study emphasize that alterations of distinct regions of the genome may be genetic biomarkers for a poor prognosis. Losses of chromosomes 17 and 22 can be associated with a family history of cancer.
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Affiliation(s)
- Nádia Aparecida Bérgamo
- Department of Genetics, Institute of Biosciences and NeoGene Laboratory, Department of Urology, Faculty of Medicine, São Paulo State University, CEP 18618-999, Rua Botucatu, São Paulo, Brazil
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13
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Cavalli LR, Cornélio DA, Wuicik L, Bras AT, Ribeiro EM, Lima RS, Urban CA, Rogatto SR, Cavalli IJ. Clonal chromosomal alterations in fibroadenomas of the breast. Cancer Genet Cytogenet 2001; 131:120-4. [PMID: 11750051 DOI: 10.1016/s0165-4608(01)00502-7] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
A cytogenetic study on short-term cell cultures from 10 fibroadenomas of the breast is reported. Clonal chromosomal alterations were observed in all cases analyzed, involving preferentially chromosomes X, 12, 14, 20, and 22. Normal karyotypes were found in 34.9% of the cells. The present findings are discussed together with the reports on fibroadenomas and other benign lesions of the breast described in the literature. Although no specific chromosome abnormality to date can be attributed to a particular type of benign breast pathology, some recurrent alterations are starting to emerge and may characterize these benign breast lesions, differentiating them from their malignant counterparts.
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Affiliation(s)
- L R Cavalli
- Departamento de Genética, Universidade Federal do Paraná, Caixa Postal 19071, CEP 81531-970, Curitiba, Paraná, Brazil.
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14
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Camargo AA, Samaia HP, Dias-Neto E, Simão DF, Migotto IA, Briones MR, Costa FF, Nagai MA, Verjovski-Almeida S, Zago MA, Andrade LE, Carrer H, El-Dorry HF, Espreafico EM, Habr-Gama A, Giannella-Neto D, Goldman GH, Gruber A, Hackel C, Kimura ET, Maciel RM, Marie SK, Martins EA, Nobrega MP, Paco-Larson ML, Pardini MI, Pereira GG, Pesquero JB, Rodrigues V, Rogatto SR, da Silva ID, Sogayar MC, Sonati MF, Tajara EH, Valentini SR, Alberto FL, Amaral ME, Aneas I, Arnaldi LA, de Assis AM, Bengtson MH, Bergamo NA, Bombonato V, de Camargo ME, Canevari RA, Carraro DM, Cerutti JM, Correa ML, Correa RF, Costa MC, Curcio C, Hokama PO, Ferreira AJ, Furuzawa GK, Gushiken T, Ho PL, Kimura E, Krieger JE, Leite LC, Majumder P, Marins M, Marques ER, Melo AS, Melo MB, Mestriner CA, Miracca EC, Miranda DC, Nascimento AL, Nobrega FG, Ojopi EP, Pandolfi JR, Pessoa LG, Prevedel AC, Rahal P, Rainho CA, Reis EM, Ribeiro ML, da Ros N, de Sa RG, Sales MM, Sant'anna SC, dos Santos ML, da Silva AM, da Silva NP, Silva WA, da Silveira RA, Sousa JF, Stecconi D, Tsukumo F, Valente V, Soares F, Moreira ES, Nunes DN, Correa RG, Zalcberg H, Carvalho AF, Reis LF, Brentani RR, Simpson AJ, de Souza SJ, Melo M. The contribution of 700,000 ORF sequence tags to the definition of the human transcriptome. Proc Natl Acad Sci U S A 2001; 98:12103-8. [PMID: 11593022 PMCID: PMC59775 DOI: 10.1073/pnas.201182798] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Open reading frame expressed sequences tags (ORESTES) differ from conventional ESTs by providing sequence data from the central protein coding portion of transcripts. We generated a total of 696,745 ORESTES sequences from 24 human tissues and used a subset of the data that correspond to a set of 15,095 full-length mRNAs as a means of assessing the efficiency of the strategy and its potential contribution to the definition of the human transcriptome. We estimate that ORESTES sampled over 80% of all highly and moderately expressed, and between 40% and 50% of rarely expressed, human genes. In our most thoroughly sequenced tissue, the breast, the 130,000 ORESTES generated are derived from transcripts from an estimated 70% of all genes expressed in that tissue, with an equally efficient representation of both highly and poorly expressed genes. In this respect, we find that the capacity of the ORESTES strategy both for gene discovery and shotgun transcript sequence generation significantly exceeds that of conventional ESTs. The distribution of ORESTES is such that many human transcripts are now represented by a scaffold of partial sequences distributed along the length of each gene product. The experimental joining of the scaffold components, by reverse transcription-PCR, represents a direct route to transcript finishing that may represent a useful alternative to full-length cDNA cloning.
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Affiliation(s)
- A A Camargo
- Ludwig Institute for Cancer Research, 01509-010, São Paulo, Brazil
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Abstract
BACKGROUND IGF2 and H19 are reciprocal imprinted genes with paternal and maternal monoallelic expression, respectively. This is interesting, because IGF2 is known as a growth factor, and H19 encodes a RNA with putative tumor suppressor action. Furthermore, IGF2 and H19 are linked genes located on chromosome 11p15.5, a common site of loss of heterozygosity in human cancers. METHODS We performed an allelic-typing assay using a PCR-RFLP-based method for identification of heterozygous informative cases in head and neck squamous cell carcinomas. Tumoral total RNA was extracted from each of the heterozygotes and further studied by RT-PCR analysis. RESULTS We detected the expression of the IGF2 gene in 10 of 10 informative cases. Two cases exhibited LOI of the IGF2 gene as evidenced by biallelic expression, and in another case, LOH was coupled with monoallelic expression of this growth factor. LOI for the H19 gene was observed in 1 of 14 informative samples analyzed. In this case, we also detected parallel monoallelic expression of the IGF2 gene. Down-regulation of the H19 gene was observed in 10 of 14 cases. CONCLUSION These findings support the hypothesis that H19 may be a tumor suppressor gene involved in head and neck carcinogenesis. Furthermore, our data showed that genetic and epigenetic changes at 11p15.5 could lead to abnormal expression of imprinted genes in HNSCC.
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Affiliation(s)
- C A Rainho
- Department of Genetics, IB, UNESP, Botucatu, São Paulo, 18618-000, Brazil
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16
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Abstract
Comparative genomic hybridization analysis was performed for identification of chromosomal imbalances in 23 samples of fibroadenomas of the breast. Chromosomal gains rather than losses were a feature of these lesions. Only two cases with a familial and/or previous history of breast lesions had gain of 1q or 16q as the sole abnormality. The most frequently overrepresented segments were 5p14 (10/23 cases), 5q34-qter (6/23 cases), 13q32-qter (6/23 cases), 10q25-qter (5/23 cases), and 18q22 (4/23 cases). Some of these regions have previously been associated with breast carcinoma, but this study indicates that gain of these regions can also occur in benign breast lesions. Our findings may provide a basis for conducting further investigations to locate and identify genes associated with proliferation that may be involved in the early steps of tumorigenesis of the breast.
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Affiliation(s)
- E P Ojopi
- Department of Genetics, IB-UNESP-Botucatu, São Paulo, Brazil
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17
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de Souza SJ, Camargo AA, Briones MR, Costa FF, Nagai MA, Verjovski-Almeida S, Zago MA, Andrade LE, Carrer H, El-Dorry HF, Espreafico EM, Habr-Gama A, Giannella-Neto D, Goldman GH, Gruber A, Hackel C, Kimura ET, Maciel RM, Marie SK, Martins EA, Nobrega MP, Paco-Larson ML, Pardini MI, Pereira GG, Pesquero JB, Rodrigues V, Rogatto SR, da Silva ID, Sogayar MC, de Fátima Sonati M, Tajara EH, Valentini SR, Acencio M, Alberto FL, Amaral ME, Aneas I, Bengtson MH, Carraro DM, Carvalho AF, Carvalho LH, Cerutti JM, Corrêa ML, Costa MC, Curcio C, Gushiken T, Ho PL, Kimura E, Leite LC, Maia G, Majumder P, Marins M, Matsukuma A, Melo AS, Mestriner CA, Miracca EC, Miranda DC, Nascimento AN, Nóbrega FG, Ojopi EP, Pandolfi JR, Pessoa LG, Rahal P, Rainho CA, da Rós N, de Sá RG, Sales MM, da Silva NP, Silva TC, da Silva W, Simão DF, Sousa JF, Stecconi D, Tsukumo F, Valente V, Zalcbeg H, Brentani RR, Reis FL, Dias-Neto E, Simpson AJ. Identification of human chromosome 22 transcribed sequences with ORF expressed sequence tags. Proc Natl Acad Sci U S A 2000; 97:12690-3. [PMID: 11070084 PMCID: PMC18825 DOI: 10.1073/pnas.97.23.12690] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Transcribed sequences in the human genome can be identified with confidence only by alignment with sequences derived from cDNAs synthesized from naturally occurring mRNAs. We constructed a set of 250,000 cDNAs that represent partial expressed gene sequences and that are biased toward the central coding regions of the resulting transcripts. They are termed ORF expressed sequence tags (ORESTES). The 250,000 ORESTES were assembled into 81,429 contigs. Of these, 1, 181 (1.45%) were found to match sequences in chromosome 22 with at least one ORESTES contig for 162 (65.6%) of the 247 known genes, for 67 (44.6%) of the 150 related genes, and for 45 of the 148 (30.4%) EST-predicted genes on this chromosome. Using a set of stringent criteria to validate our sequences, we identified a further 219 previously unannotated transcribed sequences on chromosome 22. Of these, 171 were in fact also defined by EST or full length cDNA sequences available in GenBank but not utilized in the initial annotation of the first human chromosome sequence. Thus despite representing less than 15% of all expressed human sequences in the public databases at the time of the present analysis, ORESTES sequences defined 48 transcribed sequences on chromosome 22 not defined by other sequences. All of the transcribed sequences defined by ORESTES coincided with DNA regions predicted as encoding exons by genscan. (http://genes.mit.edu/GENSCAN.html).
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Affiliation(s)
- S J de Souza
- Ludwig Institute for Cancer Research, São Paulo 01509-010, SP, Brazil
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18
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Abstract
BACKGROUND Loss of heterozygosity (LOH) correlates with inactivated tumor suppressor genes. LOH at chromosome arm 22q has been found in a variety of human neoplasms, suggesting that this region contains a tumor suppressor gene(s) other than NF2 important to tumorigenesis. The aim of this study was to evaluate the presence of LOH on chromosome 22q11.2-13 and determine whether there was a relationship between loss in this genomic region and tumor histologic parameters, anatomic site, and survival in patients with squamous cell carcinoma of the head and neck (HNSCC). METHODS Fifty matched blood and HNSCC tumor samples taken at the time of surgical treatment were evaluated for LOH by use of four microsatellite markers mapping to 22q11.2-q13. Clinical information was available for all patients. The frequency and distribution of LOH was correlated with clinical (age, sex, use of tobacco and alcohol, site of primary tumor, clinical stage, adjuvant therapy and overall survival) and histologic parameters (histopathologic stage, tumor differentiation). RESULTS LOH at 22q was found in 19 of 50 (38%) informative tumors. The respective incidence of allelic loss for the patients was as follows: 28% at D22S421, 10% at D22S277, 8% at D22S446, and 4% at D22S280. No statistical differences were apparent with a mean follow-up of 30 months. Laryngeal tumors showed a higher incidence of LOH compared with oral tumors. CONCLUSIONS These results suggest that the D22S277 locus may be closely linked to a tumor suppressor gene (TSG) and involved in upper aerodigestive tract carcinogenesis. In particular, laryngeal tumors may harbor another putative TSG on 22q11.2-q12.3 that may play a role in aggressive stage III/IV disease.
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19
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Abstract
BACKGROUND Loss of heterozygosity (LOH) correlates with inactivated tumor suppressor genes. LOH at chromosome arm 22q has been found in a variety of human neoplasms, suggesting that this region contains a tumor suppressor gene(s) other than NF2 important to tumorigenesis. The aim of this study was to evaluate the presence of LOH on chromosome 22q11.2-13 and determine whether there was a relationship between loss in this genomic region and tumor histologic parameters, anatomic site, and survival in patients with squamous cell carcinoma of the head and neck (HNSCC). METHODS Fifty matched blood and HNSCC tumor samples taken at the time of surgical treatment were evaluated for LOH by use of four microsatellite markers mapping to 22q11.2-q13. Clinical information was available for all patients. The frequency and distribution of LOH was correlated with clinical (age, sex, use of tobacco and alcohol, site of primary tumor, clinical stage, adjuvant therapy and overall survival) and histologic parameters (histopathologic stage, tumor differentiation). RESULTS LOH at 22q was found in 19 of 50 (38%) informative tumors. The respective incidence of allelic loss for the patients was as follows: 28% at D22S421, 10% at D22S277, 8% at D22S446, and 4% at D22S280. No statistical differences were apparent with a mean follow-up of 30 months. Laryngeal tumors showed a higher incidence of LOH compared with oral tumors. CONCLUSIONS These results suggest that the D22S277 locus may be closely linked to a tumor suppressor gene (TSG) and involved in upper aerodigestive tract carcinogenesis. In particular, laryngeal tumors may harbor another putative TSG on 22q11.2-q12.3 that may play a role in aggressive stage III/IV disease.
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20
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Bergamo NA, Rogatto SR, Poli-Frederico RC, Reis PP, Kowalski LP, Zielenska M, Squire JA. Comparative genomic hybridization analysis detects frequent over-representation of DNA sequences at 3q, 7p, and 8q in head and neck carcinomas. Cancer Genet Cytogenet 2000; 119:48-55. [PMID: 10812171 DOI: 10.1016/s0165-4608(99)00213-7] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
Comparative genomic hybridization (CGH) was used to identify chromosomal imbalances in 19 samples of squamous cell carcinoma of the head and neck (HNSCC). The chromosome arms most often over-represented were 3q (48%), 8q (42%), and 7p (32%); in many cases, these changes were observed at high copy number. Other commonly over-represented sites were 1q, 2q, 6p, 6q, and 18q. The most frequently under-represented segments were 3p and 22q. Loss of heterozygosity of two polymorphic microsatellite loci from chromosome 22 was observed in two tongue tumors, in agreement with the CGH analysis. Gains of 1q and 2q material were detected in patients exhibiting a clinical history of recurrence and/or metastasis followed by terminal disease. This association suggests that gain of 1q and 2q may be a new marker of head and neck tumors with a refractory clinical response.
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Affiliation(s)
- N A Bergamo
- Department of Genetics, IB, UNESP, Botucatu, São Paulo, Brazil
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21
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Abstract
Genomic imprinting is defined as a gamete of origin-specific epigenetic modification of DNA leading to differential gene expression in the zygote. Several imprinted genes have been identified and some of them are associated with tumor development. We investigated the expression and the imprinting status of IGF2 and H19 genes in 47 uterine leiomyomas. Using allelic transcription assay, we detected the expression of the IGF2 gene in 10 of a total of 15 informative cases. No loss of imprinting, as determined by the finding of biallelic expression, was detected in any case. The expression of H19 gene was detected in 10 of 20 informative cases and the imprinting pattern was also maintained in all of them. Our data suggest that alterations in IGF2 and H19 genes expression by loss of imprinting do not occur in uterine leiomyomas.
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Affiliation(s)
- C A Rainho
- Department of Genetics, IB, UNESP, Botucatu, São Paulo, Brazil
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22
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Rogatto SR, Rainho CA, Zhang ZM, Figueiredo F, Barbieri-Neto J, Georgetto SM, Squire JA. Hemangioendothelioma of bone in a patient with a constitutional supernumerary marker. Cancer Genet Cytogenet 1999; 110:23-7. [PMID: 10198618 DOI: 10.1016/s0165-4608(98)00192-7] [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] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A 13-year old girl was diagnosed as having a bone hemangioendothelioma. Cytogenetic studies identified the presence of a small supernumerary marker chromosome in this patient. Classical cytogenetic methods using G-, C-, Ag-NOR-banding were supplemented by spectral karyotyping (SKY) and fluorescence in situ hybridization to reveal a karyotype 47,XX,+mar.ish der(22)(D22S543+) karyotype in cells derived from the tumor and lymphocytes. These findings suggest that the supernumerary marker chromosome originated from the proximal centromeric region of chromosome 22, and that trisomy of the region 22q11 was not associated with adverse phenotypic effects, but that the presence of trisomy 22q11 may be related to the development of this tumor.
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Affiliation(s)
- S R Rogatto
- Department of Genetics, UNESP, Botucatu, São Paulo, Brazil
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Abstract
Chromosome analysis was performed on samples from 20 Brazilian patients with breast cancer. All the samples were from untreated patients who presented the clinical symptoms for months or years before surgical intervention. Six cases showed axillary lymph node metastases. Clonal chromosome abnormalities were detected in all cases. The numerical alterations most frequently observed involved the loss of chromosomes X, 19, 20, and 22 followed by gain of chromosomes 9 and 8. Among the structural anomalies observed, there was preferential involvement of chromosomes 11, 6, 1, 7, 3, and 12, supporting previous reports that these chromosomes may harbour genes of importance in the development of breast tumors. Two cases with a family history of breast cancer had in common total or partial trisomy 1.
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Affiliation(s)
- L R Cavalli
- Department of Genetics, Universidade Federal do Paraná, Curitiba, PR
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Abstract
The cytogenetic findings on G-banding in an infiltrating ductal breast carcinoma in a 69-year-old man are reported. The main abnormalities observed were trisomy of chromosomes 8 and 9 and structural rearrangement in the long arm of chromosome 17 (add(17)(q25)). Our results confirm the trisomy of chromosome 8 in the characterization of the subtype of ductal breast carcinomas and demonstrate that chromosome 17, which is frequently involved in female breast cancers, is also responsible for the development or progression of primary breast cancers in males.
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Affiliation(s)
- L R Cavalli
- Departamento de Genética, Universidade Federal do Paraná, Curitiba, Pr, Brazil
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25
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Abstract
Cytogenetic analysis was performed on cultures of primary ependymal tumors with different degrees of malignancy (I-IV) obtained from four patients, none of whom had received therapy before karyotypic evaluation. The most common abnormalities were monosomy 17 and 22 in four cases and losses of sex chromosomes in three cases. Structural rearrangements of chromosome 2 were a finding for all cases and involved loss of material at 2q32-34. Other structural chromosome abnormalities detected involved chromosomes 4, 6, 10, 11, 12, and X. We also reviewed data on 22 cases previously reported.
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Affiliation(s)
- S R Rogatto
- Departamento de Biologia Geral, CCB, Universidade Estadual de Londrina, Brazil
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Abstract
The cytogenetic findings based on G-banding in a pineocytoma detected in a 29-year-old woman are reported. The chromosomal study showed numerical alterations involving chromosomes X, 5, 8, 11, 14, and 22, structural alterations of chromosomes 1, 3, 12, and 22, as well as various markers. Tumors of the pineal region are infrequent, and this is the first report of a pineocytoma studied cytogenetically.
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Affiliation(s)
- C A Rainho
- Departamento de Biologia Geral, Universidade Estadual de Londrina, PR, Brazil
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Abstract
Cytogenetic analysis of an untreated sarcomatous meningioma from a patient submitted to two surgeries separated by 1 year are reported. The material from the first surgery was mostly hypodiploid, with a modal chromosome number of 42. Alterations of chromosome 22 were found in 80.6% of the cells. Four chromosome markers were found involving chromosomes 1, 2, 6, and 22, and numerical alterations involving chromosomes 8, 9, 10, 13, 14, 15, 18, 19, 20, 21, and Y. Although the modal chromosome number of the material from the second surgery was 45 (17.9% of the cells), 43.1% of its cells were hyperdiploid, 73% of these being in the triploid-tetraploid range. Dicentric and ring chromosomes were very frequent. Alterations involving chromosome 22 were still present. There was a recurrent trisomy of chromosome 3. To our knowledge, this is the first cytogenetic description, with banding techniques, of a malignant meningioma.
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Affiliation(s)
- C Casartelli
- Department of Genetics, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Brazil
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Casartelli C, Rogatto SR, Ferrari I. Cytogenetic analysis of some Brazilian marsupials (Didelphidae: Marsupialia). Can J Genet Cytol 1986; 28:21-9. [PMID: 3697826 DOI: 10.1139/g86-005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Three species of marsupials from the Amazon region (Marmosa cinerea, Caluromys lanatus, and Didelphis marsupialis) and two from the region of São Paulo (Didelphis marsupialis and Didelphis albiventris) were studied. The G-banding pattern of the species with 2n = 14 (M. cinerea and C. lanatus) was very similar, as well as the pattern of G-bands in the species with 22 chromosomes (Didelphis). All of the autosomes of M. cinerea and D. albiventris have centromeric C-bands and the Y chromosome is totally C-band positive. The long arm of the M. cinerea X chromosome is completely C-band positive except for a negative band close to the centromeric region. In D. albiventris the long arm of the X chromosome is C-band positive except for a negative band close to the telomeric region. In M. cinerea the silver-stained nucleolar organizer regions (Ag-NORs) are found in the acrocentric chromosomes, being located in the telomeric region of one pair and in the centromeric region of the other pair. Caluromys lanatus has centromeric Ag-NORs in one acrocentric and in one submetacentric chromosome pairs. Didelphis marsupialis has three chromosome pairs with telomeric Ag-NORs. In D. albiventris the Ag-NORs are terminal and located in both arms of one pair and in the long arm of two pairs of chromosomes.
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