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Wei S, Peng L, Yang J, Sang H, Jin D, Li X, Chen M, Zhang W, Dang Y, Zhang G. Exosomal transfer of miR-15b-3p enhances tumorigenesis and malignant transformation through the DYNLT1/Caspase-3/Caspase-9 signaling pathway in gastric cancer. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2020; 39:32. [PMID: 32039741 PMCID: PMC7011526 DOI: 10.1186/s13046-019-1511-6] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 12/17/2019] [Indexed: 02/10/2023]
Abstract
Background Exosomes are essential for tumor growth, metastasis, and are used as novel signaling molecules in targeted therapies. Therefore, exosomal miRNAs can be used in new diagnostic and therapeutic approaches due to their involvement in the development of cancers. However, the detailed biological function, potential molecular mechanism and clinical application of exo-miR-15b-3p in gastric cancer (GC) remains unclear. Methods miR-15b-3p mRNA levels in tissues, serum, cells and exosomes were analyzed using qRT-PCR assays. qRT-PCR, immunohistochemical and western blotting analyses were utilized for the determination of DYNLT1 expression. The interrelationship connecting miR-15b-3p with DYNLT1 was verified using Dual-luciferase report, western blotting and qRT-PCR assays. Fluorescent PKH-26 or GFP-Lv-CD63 labeled exosomes, as well as Cy3-miR-15b-3p, were utilized to determine the efficacy of the transfer of exo-miR-15b-3p between BGC-823 and recipient cells. Several in vitro assays and xenograft tumor models were conducted to determine exo-miR-15b-3p impact on GC progression. Results This is the first study to confirm high miR-15b-3p expression in GC cell lines, tissues and serum. Exosomes obtained from 108 GC patient serum samples and GC cell-conditioned medium were found to show upregulation of exo-miR-15b-3p, with the area under the ROC curve (AUC) being 0.820 [0.763–0.876], which is superior to the AUC of tissues and serum miR-15b-3p (0.674 [0.600–0.748] and 0.642 [0.499–0.786], respectively). In addition, high exo-miR-15b-3p expression in serum was found to accurately predict worse overall survival. SGC-7901 and GES-1 cells are capable of internalizing BGC-823 cell-derived exosomes, allowing the transfer of miR-15b-3p. Migration, invasion, proliferation and inhibition of apoptosis in vitro and in vivo were enhanced by exo-miR-15b-3p, by restraining DYNLT1, Cleaved Caspase-9 and Caspase-3 expression. Conclusions This study identified a previously unknown regulatory pathway, exo-miR-15b-3p/DYNLT1/Caspase-3/Caspase-9, which promotes GC development and GES-1 cell malignant transformation. Therefore, serum exo-miR-15b-3p may be a potential GC diagnosis and prognosis biomarker, which can be used in precise targeted GC therapy.
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Affiliation(s)
- Shuchun Wei
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Lei Peng
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Jiajia Yang
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Huaiming Sang
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Duochen Jin
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Xuan Li
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Meihong Chen
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Weifeng Zhang
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China
| | - Yini Dang
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China.
| | - Guoxin Zhang
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, China.
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2
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Das K, Tan P. Molecular cytogenetics: recent developments and applications in cancer. Clin Genet 2013; 84:315-25. [DOI: 10.1111/cge.12229] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 07/02/2013] [Accepted: 07/02/2013] [Indexed: 12/13/2022]
Affiliation(s)
- K Das
- Cancer and Stem Cell Biology; Duke-NUS Graduate Medical School; Singapore Singapore
| | - P Tan
- Cancer and Stem Cell Biology; Duke-NUS Graduate Medical School; Singapore Singapore
- Cancer Science Institute of Singapore, Yong Loo Lin School of Medicine; National University of Singapore; Singapore Singapore
- Genome Institute of Singapore; Singapore Singapore
- Cellular and Molecular Research; National Cancer Centre of Singapore; Singapore Singapore
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3
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de Souza CRT, Leal MF, Calcagno DQ, Costa Sozinho EK, Borges BDN, Montenegro RC, Dos Santos AKCR, Dos Santos SEB, Ribeiro HF, Assumpção PP, de Arruda Cardoso Smith M, Burbano RR. MYC deregulation in gastric cancer and its clinicopathological implications. PLoS One 2013; 8:e64420. [PMID: 23717612 PMCID: PMC3661519 DOI: 10.1371/journal.pone.0064420] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Accepted: 04/12/2013] [Indexed: 12/13/2022] Open
Abstract
Our study investigated the relationship between MYC alterations and clinicopathological features in gastric cancers. We evaluated the effect of MYC mRNA expression and its protein immunoreactivity, as well as copy number variation, promoter DNA methylation, and point mutations, in 125 gastric adenocarcinoma and 67 paried non-neoplastic tissues. We observed that 77% of the tumors presented MYC immunoreactivity which was significantly associated with increased mRNA expression (p<0.05). These observations were associated with deeper tumor extension and the presence of metastasis (p<0.05). MYC protein expression was also more frequently observed in intestinal-type than in diffuse-type tumors (p<0.001). Additionally, MYC mRNA and protein expression were significantly associated with its copy number (p<0.05). The gain of MYC copies was associated with late-onset, intestinal-type, advanced tumor stage, and the presence of distant metastasis (p<0.05). A hypomethylated MYC promoter was detected in 86.4% of tumor samples. MYC hypomethylation was associated with diffuse-type, advanced tumor stage, deeper tumor extension, and the presence of lymph node metastasis (p<0.05). Moreover, eighteen tumor samples presented at least one known mutation. The presence of MYC mutations was associated with diffuse-type tumor (p<0.001). Our results showed that MYC deregulation was mainly associated with poor prognostic features and also reinforced the presence of different pathways involved in intestinal-type and diffuse-type gastric carcinogenesis. Thus, our findings suggest that MYC may be a useful marker for clinical stratification and prognosis.
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4
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Zhang Y, Yan G, Zhai L, Xu S, Shen H, Yao J, Wu F, Xie L, Tang H, Yu H, Liu M, Yang P, Xu P, Zhang C, Li L, Chang C, Li N, Wu S, Zhu Y, Wang Q, Wen B, Lin L, Wang Y, Zheng G, Zhou L, Lu H, Liu S, He F, Zhong F. Proteome Atlas of Human Chromosome 8 and Its Multiple 8p Deficiencies in Tumorigenesis of the Stomach, Colon, and Liver. J Proteome Res 2012; 12:81-8. [PMID: 23256868 DOI: 10.1021/pr300834r] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Yang Zhang
- Institutes of Biomedical Sciences
and Department of Chemistry, Fudan University, Shanghai 200032, China
| | - Guoquan Yan
- Institutes of Biomedical Sciences
and Department of Chemistry, Fudan University, Shanghai 200032, China
| | - Linhui Zhai
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing 102206,
China
- National Engineering Research Center for Protein Drugs, Beijing
102206, China
| | | | - Huali Shen
- Institutes of Biomedical Sciences
and Department of Chemistry, Fudan University, Shanghai 200032, China
| | - Jun Yao
- Institutes of Biomedical Sciences
and Department of Chemistry, Fudan University, Shanghai 200032, China
| | - Feifei Wu
- Institutes of Biomedical Sciences
and Department of Chemistry, Fudan University, Shanghai 200032, China
| | - Liqi Xie
- Institutes of Biomedical Sciences
and Department of Chemistry, Fudan University, Shanghai 200032, China
| | - Hailin Tang
- College of Mechanical & Electronic Engineering and Automatization, National University of Defense Technology, Changsha 410073, China
| | - Hongxiu Yu
- Institutes of Biomedical Sciences
and Department of Chemistry, Fudan University, Shanghai 200032, China
| | - Mingqi Liu
- Institutes of Biomedical Sciences
and Department of Chemistry, Fudan University, Shanghai 200032, China
| | - Pengyuan Yang
- Institutes of Biomedical Sciences
and Department of Chemistry, Fudan University, Shanghai 200032, China
| | - Ping Xu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing 102206,
China
- National Engineering Research Center for Protein Drugs, Beijing
102206, China
| | - Chengpu Zhang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing 102206,
China
- National Engineering Research Center for Protein Drugs, Beijing
102206, China
| | - Liwei Li
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing 102206,
China
- National Engineering Research Center for Protein Drugs, Beijing
102206, China
| | - Cheng Chang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing 102206,
China
- National Engineering Research Center for Protein Drugs, Beijing
102206, China
| | - Ning Li
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing 102206,
China
- National Engineering Research Center for Protein Drugs, Beijing
102206, China
| | - Songfeng Wu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing 102206,
China
- National Engineering Research Center for Protein Drugs, Beijing
102206, China
| | - Yunping Zhu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing 102206,
China
- National Engineering Research Center for Protein Drugs, Beijing
102206, China
| | - Quanhui Wang
- BGI-Shenzhen,
Shenzhen 518083, China
- Beijing Institute of Genomics, Chinese
Academy of Sciences, Beijing 100029, China
| | - Bo Wen
- BGI-Shenzhen,
Shenzhen 518083, China
| | - Liang Lin
- BGI-Shenzhen,
Shenzhen 518083, China
| | | | | | - Lanping Zhou
- State Key Laboratory of Molecular Oncology, Cancer Institute & Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100021, China
| | - Haojie Lu
- Institutes of Biomedical Sciences
and Department of Chemistry, Fudan University, Shanghai 200032, China
| | - Siqi Liu
- BGI-Shenzhen,
Shenzhen 518083, China
- Beijing Institute of Genomics, Chinese
Academy of Sciences, Beijing 100029, China
| | - Fuchu He
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing 102206,
China
- National Engineering Research Center for Protein Drugs, Beijing
102206, China
| | - Fan Zhong
- Institutes of Biomedical Sciences
and Department of Chemistry, Fudan University, Shanghai 200032, China
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MYC, TP53, and chromosome 17 copy-number alterations in multiple gastric cancer cell lines and in their parental primary tumors. J Biomed Biotechnol 2011; 2011:631268. [PMID: 21528007 PMCID: PMC3082130 DOI: 10.1155/2011/631268] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2010] [Revised: 12/23/2010] [Accepted: 01/08/2011] [Indexed: 02/06/2023] Open
Abstract
We evaluated whether MYC, TP53, and chromosome 17 copy-number alterations occur in ACP02, ACP03, and AGP01 gastric cancer cell lines and in their tumor counterpart. Fluorescence in situ hybridization for MYC and TP53 genes and for chromosome 17 was applied in the 6th, 12th, 60th, and 85th passages of the cell lines and in their parental primary tumors. We observed that three and four MYC signals were the most common alterations in gastric cell lines and tumors. ACP02 presented cells with two copies of chr17 and loss of one copy of TP53 more frequently than ACP03 and AGP01. Only ACP03 and AGP01 presented clonal chr17 trisomy with three or two TP53 copies. The frequency of MYC gain, TP53 loss, and chromosome 17 trisomy seems to increase in gastric cell lines compared to their parental tumors. Our findings reveal that these cell lines retain, in vitro, the genetic alterations presented in their parental primary tumors.
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Ribeiro H, Alcântara D, Matos L, Sousa J, Leal M, Smith M, Burbano R, Bahia M. Cytogenetic characterization and evaluation of c-MYC gene amplification in PG100, a new Brazilian gastric cancer cell line. Braz J Med Biol Res 2010; 43:717-21. [DOI: 10.1590/s0100-879x2010007500068] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2010] [Accepted: 07/05/2010] [Indexed: 12/18/2022] Open
Affiliation(s)
| | | | | | | | - M.F. Leal
- Universidade Federal de São Paulo, Brasil
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7
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Costa Raiol LC, Figueira Silva EC, Mendes da Fonseca D, Leal MF, Guimarães AC, Calcagno DQ, Khayat AS, Assumpção PP, de Arruda Cardoso Smith M, Burbano RR. Interrelationship between MYC gene numerical aberrations and protein expression in individuals from northern Brazil with early gastric adenocarcinoma. ACTA ACUST UNITED AC 2008; 181:31-5. [PMID: 18262050 DOI: 10.1016/j.cancergencyto.2007.10.011] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2007] [Accepted: 10/22/2007] [Indexed: 12/16/2022]
Abstract
Gastric cancer is the second leading cause of death by cancer in Brazil. Early gastric cancer represents approximately 10% of gastric cancer cases in some services of Brazil, which underscores the need for early gastric cancer diagnosis that could lead to better prognosis. There are few published studies of cytogenetic alterations in early gastric cancer. To evaluate MYC copy number and its protein expression, we performed fluorescence in situ hybridization and immunohistochemical analyses in five early gastric adenocarcinomas in individuals from northern Brazil. Three signals of MYC and MYC immunoreactivity were observed in all five samples, regardless of histologic type, tumor extension, or lymph nodal status. These novel findings concerning MYC copy number alteration in early gastric cancer suggest that MYC alteration is observed in the beginning of gastric carcinogenesis and could be used as a therapeutic target.
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Affiliation(s)
- Láuren Cláudia Costa Raiol
- Human Cytogenetics and Toxicological Genetics Laboratory, Institute of Biological Sciences, Federal University of Pará, Campus Universitário do Guamá, Av. Augusto Correa, 01, CEP 66075-900, Belém, PA, Brazil
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8
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Panani AD. Cytogenetic and molecular aspects of gastric cancer: clinical implications. Cancer Lett 2008; 266:99-115. [PMID: 18381231 DOI: 10.1016/j.canlet.2008.02.053] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2007] [Revised: 02/05/2008] [Accepted: 02/22/2008] [Indexed: 12/13/2022]
Abstract
Gastric cancer is of major importance world-wide being the second most common cause of cancer-related death in the world. According to Lauren's histological classification gastric cancer is divided in two groups, the better differentiated intestinal carcinomas and the poorly differentiated diffuse-type cancers. The genetic changes underlying the initiation and progression of gastric cancer are not well defined. Gastric carcinogenesis is a multistep process involving a number of genetic and epigenetic factors. Although it has been proposed that different genetic pathways exist for differentiated and undifferentiated carcinomas, the two histological subtypes of gastric cancer share some common genetic alterations. Currently, tumor histology and pathologic stage are the major prognostic variables used in the clinical practice for gastric cancer patients. However, it is known that tumors with similar morphology may differ in biological aggressiveness, prognosis and response to treatment. Molecular genetic analysis of gastric cancer revealed a number of associations of certain genetic changes with pathological features, tumor biological behavior and prognosis of gastric cancer patients, suggesting that these genetic abnormalities might play an important role in gastric tumorigenesis. Increasing evidence suggests that the molecular genetic changes could be helpful in the clinical setting, contributing to prognosis and management of patients. Regarding epigenetic events in gastric tumorigenesis, a number of methylating markers have been proposed for risk assessment, prognostic evaluation and as therapeutic targets. However, further research is required in order to systematically investigate the genetic changes in gastric cancer estimating also their usefulness in the clinical practice. A good understanding of the genetic changes underlying gastric carcinogenesis may provide new perspectives for prognosis and screening of high risk individuals. Some of the genetic alterations could definitely improve tumor classification and management of gastric cancer patients. Also, based on molecular data identified in gastric cancer novel therapeutics might help to improve the treatment of this disease.
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Affiliation(s)
- Anna D Panani
- Critical Care Department, Medical School of Athens University, Cytogenetics Unit, Evangelismos Hospital, Ipsilandou 45-47, Athens 10676, Greece
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9
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Cho YG, Choi BJ, Kim CJ, Song JH, Zhang C, Nam SW, Lee JY, Park WS. Genetic analysis of the DBC2 gene in gastric cancer. Acta Oncol 2007; 47:366-71. [PMID: 17906984 DOI: 10.1080/02841860701644094] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The DBC2 (Deleted in breast cancer, RhoBTB2) has been identified as a tumor suppressor gene that has growth inhibitory function. To investigate whether genetic alterations of the DBC2 gene are involved in the development of gastric cancer, we analyzed mutations and allelic loss in the DBC2 gene in 95 primary gastric cancers by PCR-SSCP, sequencing and LOH analysis. In the mutational analysis, we found one missense somatic mutation (CGG-->TGG, R275W) in the BTB/POZ domain of the gene in a patient with advanced gastric cancer and lymph node metastasis. In addition, we found one known polymorphism and three novel polymorphisms in the coding region of DBC2, which showed an amino acid change, and was detected in both the cancer cells and corresponding normal cells. On LOH analysis, 62 cases were heterozygous for at least one marker and 18 cases (29.0%) showed allelic loss at these markers. In conclusion, the mutations and allelic loss in the DBC2 gene are uncommon in gastric cancers in Korean patients. Further studies to identify the target gene at 8q21 responsible for the development of gastric cancer should be explored.
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Affiliation(s)
- Yong Gu Cho
- Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea
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10
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Calcagno DQ, Leal MF, Seabra AD, Khayat AS, Chen ES, Demachki S, Assumpção PP, Faria MHG, Rabenhorst SHB, Ferreira MVP, de Arruda Cardoso Smith M, Burbano RR. Interrelationship between chromosome 8 aneuploidy, C-MYC amplification and increased expression in individuals from northern Brazil with gastric adenocarcinoma. World J Gastroenterol 2006; 12:6207-11. [PMID: 17036397 PMCID: PMC4088119 DOI: 10.3748/wjg.v12.i38.6207] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate chromosome 8 numerical aberrations, C-MYC oncogene alterations and its expression in gastric cancer and to correlate these findings with histopathological characteristics of gastric tumors.
METHODS: Specimens were collected surgically from seven patients with gastric adenocarcinomas. Immunostaining for C-MYC and dual-color fluorescence in situ hybridization (FISH) for C-MYC gene and chromosome 8 centromere were performed.
RESULTS: All the cases showed chromosome 8 aneuploidy and C-MYC amplification, in both the diffuse and intestinal histopathological types of Lauren. No significant difference (P < 0.05) was observed between the level of chromosome 8 ploidy and the site, stage or histological type of the adenocarcinomas. C-MYC high amplification, like homogeneously stained regions (HSRs) and double minutes (DMs), was observed only in the intestinal-type. Structural rearrangement of C-MYC, like translocation, was observed only in the diffuse type. Regarding C-MYC gene, a significant difference (P < 0.05) was observed between the two histological types. The C-MYC protein was expressed in all the studied cases. In the intestinal-type the C-MYC immunoreactivity was localized only in the nucleus and in the diffuse type in the nucleus and cytoplasm.
CONCLUSION: Distinct patterns of alterations between intestinal and diffuse types of gastric tumors support the hypothesis that these types follow different genetic pathways.
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Affiliation(s)
- Danielle-Queiroz Calcagno
- Human Cytogenetics and Toxicological Genetics Laboratory, Department of Biology, Center of Biological Sciences, Federal University of Pará, Belém, PA, Brazil
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11
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Assumpção PP, Ishak G, Chen ES, Takeno SS, Leal MF, Guimarães AC, Calcagno DQ, Khayat AS, Demachki S, Smith MDAC, Burbano RR. Numerical aberrations of chromosome 8 detected by conventional cytogenetics and fluorescence in situ hybridization in individuals from northern Brazil with gastric adenocarcinoma. ACTA ACUST UNITED AC 2006; 169:45-9. [PMID: 16875936 DOI: 10.1016/j.cancergencyto.2006.03.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2005] [Revised: 03/29/2006] [Accepted: 03/30/2006] [Indexed: 11/25/2022]
Abstract
Gastric cancer is the third most frequent type of neoplasia and the second most important cause of cancer-related death in the world. In northern Brazil, the state of Pará shows a high incidence of this disease and the capital ranks among cities with the highest incidence of stomach cancer in the world. To evaluate chromosomal aberrations implicated in gastric carcinogenesis, we analyzed 16 samples of gastric adenocarcinoma by fluorescence in situ hybridization using a chromosome 8 alpha-satellite probe and by direct chromosomal analysis techniques. All lesions were classified as at advanced stages according to the recommendations of the Union Internationale Contre le Cancer (UICC). Trisomy 8 was the main finding of this study, observed in all cases. There was no significant difference between chromosome 8 ploidy and localization, stage, or histological type of adenocarcinoma in our sample. The high incidence of alterations we found in chromosome 8 may be a regional characteristic, related to the high incidence of this neoplasm in Pará state and a strong influence of external factors, such as eating habits. This aberration may comprise a cytogenetic subgroup of this neoplasm. Additional investigations are necessary to confirm the involvement of chromosome 8 and to identify genes in this chromosome related to gastric carcinogenesis.
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Affiliation(s)
- Paulo Pimentel Assumpção
- Department of Pathology and Surgery Service, João de Barros Barreto University Hospital, Federal University of Pará, Belém, PA, Brazil
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12
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Yamashita Y, Nishida K, Okuda T, Nomura K, Matsumoto Y, Mitsufuji S, Horiike S, Hata H, Sakakura C, Hagiwara A, Yamagishi H, Taniwaki M. Recurrent chromosomal rearrangements at bands 8q24 and 11q13 in gastric cancer as detected by multicolor spectral karyotyping. World J Gastroenterol 2005; 11:5129-35. [PMID: 16127741 PMCID: PMC4320384 DOI: 10.3748/wjg.v11.i33.5129] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To identify chromosomal translocations specific to gastric cancer (GC), spectral karyotyping (SKY) analysis was performed on established cell lines and cancerous ascitic fluids.
METHODS: SKY analysis of 10 established cell lines and seven cancerous ascitic fluid samples identified recurrent chromosomal breakpoints and translocations in GC, several of which involved chromosomal loci of oncogenes or tumor suppressor genes.
RESULTS: A total of 630 chromosomal breaks were identified. Chromosome no.8 was the most frequently involved in rearrangements (65 breaks), followed by chromosomes no.11 (53), no. 1 (49), no. 7 (46), no. 13 (37), no. 3 (36), no. 17 (33), and no. 20 (29). Frequent breakpoints were detected in 8q24.1 (30 breaks), 11q13 (29), 13q14 (16), 20q11.2 (14), 7q32 (13), 17q11.2 (13), 18q21 (12), 17q23 (9), 18q11.2 (9). SKY analysis identified a total of 242 chromosomal rearrangements including 190 reciprocal and non-reciprocal translocations. The recurrent combinations of chromosomal bands involved in translocations were 8q24.1 and 13q14 (3 cases), 8q24.1 and 11q13 (3), 11q13 and 17q11.2 (2), and 18q11.2 and 20q11.2 (2). Our study validated the ability of SKY to characterize in detail the chromosomal rearrangements in solid tumors and derived cell lines. Moreover, fluorescence in situ hybridization helped to identify the insertions, translocations, and homogeneously staining regions of MYC and CCND1 gene loci.
CONCLUSION: The non-random co-localization of certain cytogenetic bands suggests the importance of chromosomal translocations in gastric carcinogenesis, by serving as landmarks for the cloning of GC causing genes.
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Affiliation(s)
- Yasuhide Yamashita
- Department of Gastroenterology and Hepatology, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan
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13
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Panani AD, Roussos C. Non-random structural chromosomal changes in primary gastric cancer. Cancer Lett 2005; 225:291-5. [PMID: 15978333 DOI: 10.1016/j.canlet.2004.12.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2004] [Revised: 11/30/2004] [Accepted: 12/01/2004] [Indexed: 11/27/2022]
Abstract
Gastric cancer is of major importance world-wide representing the second most common cause of cancer related death in the world. Data concerning the chromosomal changes in gastric cancer are limited and no specific change has been identified to date. We have studied cytogenetically 15 cases of primary gastric cancer by direct culture of tumors cells and G-banding technique. We focused on structural aberrations observed in order to identify non-random aberrations presenting common chromosomal breakpoints. Chromosomes most commonly involved were according to frequency 1,11,14,7,17,6,8 and 13. Chromosome 11 was involved as add(11)(p15), while the pericentromeric area of chromosome 14 was constantly participated in aberrations. Isochromosomes i(1q), i(8q), i(13q), i(14q) and i(17q) were constantly found. Furthermore translocations t(1;7), t(7;14), t(6;17) and t(5;14) were identified. Conventional cytogenetics continues to be valuable in cancer study detecting genomic areas potentially candidate for the isolation of genes related to carcinogenesis.
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Affiliation(s)
- Anna D Panani
- Critical Care Department, Research Unit, Medical School of Athens University, Evangelismos Hospital, Ipsilandou 45-47, Athens 10676, Greece.
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14
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Barkan GA, Caraway NP, Jiang F, Zaidi TM, Fernandez R, Vaporcyin A, Morice R, Zhou X, Bekele BN, Katz RL. Comparison of molecular abnormalities in bronchial brushings and tumor touch preparations. Cancer 2005; 105:35-43. [PMID: 15605362 DOI: 10.1002/cncr.20800] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Preneoplastic lung lesions and early-stage lung carcinomas are associated with molecular abnormalities. The authors performed a pilot study to evaluate the use of DNA fluorescence in situ hybridization (FISH) probes to ascertain whether these biomarkers can predict nonsmall cell lung carcinoma (NSCLC). METHODS Fourteen bronchial brushings ipsilateral to the tumor (BB/Ts), tumor touch imprints, and touch imprints of the bronchus adjacent to the tumor obtained from 15 patients with early-stage NSCLC were analyzed. The LAVysion multicolor probe set consisting of probes to 5p15, 6, 7p12, and 8q2 and the in-house probes 3p22.1 and 10q22 was used. Using the LAVysion multicolor probe set, 25 epithelial cells were counted and considered positive if > 5 cells were abnormal. Using 3p22.1 and 10q22, > or = 100 nuclei per slide were scored. The results were tabulated as the percentage of cells with deletions compared with the centromeric probes 3 and 10. Greater than 2% of the deletions were positive for 3p22.1 and 10q22. Bronchial washings from patients without lung tumors were used as controls. RESULTS The BB/Ts were negative for malignant cells by cytologic evaluation and the LAVysion probe set; however, the combined in-house probes for 3p22.1 and 10q22 tested on BB/Ts predicted cancer in 100% of cancer patients. FISH positivity in the lung cancers was 100% for 3p22.1 deletions, 79% for 10q22 deletions, and 57% for LAVysion probes. When compared with the bronchial epithelium, tumor cells showed a 3.7-fold excess of 3p22.1 deletions, a 2-fold excess of 10q22 deletions, and a 12.6-fold excess of abnormal cells. CONCLUSIONS The current study indicated that detection of molecular abnormalities in bronchial epithelial cells via FISH was very useful in identifying patients at high risk for developing lung carcinoma. The molecular abnormalities identified in the BB/Ts were detected at elevated levels in the tumor specimens.
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Affiliation(s)
- Güliz A Barkan
- Department of Pathology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030, USA
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15
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Ferti AD, Panani AD, Stamouli MI, Rondogianni DP, Raptis SA, Young BD. M-FISH in gastric lymphoma. ACTA ACUST UNITED AC 2004; 155:63-6. [PMID: 15527904 DOI: 10.1016/j.cancergencyto.2004.02.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2003] [Accepted: 02/17/2004] [Indexed: 11/16/2022]
Abstract
The majority of gastric B-cell lymphomas histologically are classified as low grade mucosa-associated lymphoid tissue (MALT lymphoma) and diffuse large B-cell lymphomas (DLBCL). There is evidence that the different histologic types are genetically heterogeneous, evolving through different pathogenetic pathways. Recurrent cytogenetic aberrations have been found in MALT lymphoma, whereas in DLBCL, limited cytogenetic data are available. We report here a DLBCL and a Burkitt-like gastric lymphoma case, cytogenetically studied by G-banding and M-FISH technique. In the first case, gains of chromosome 3, 7, 13, and 18 were found. An additional ring chromosome 1 identified as a clonal abnormality suggested clonal evolution. In the second case, trisomy 8, del(6)(q13), as well as t(8;14), t(1;5), and t(1;7), were observed. To our knowledge, cytogenetic data for gastric Burkitt-like lymphoma have not been reported, and M-FISH has not previously been used in the study of gastric lymphomas.
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Affiliation(s)
- Angeliki D Ferti
- Department of Internal Medicine, Sotiria Hospital, Messogion 152, Athens 11527, Greece.
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16
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Ferti AD, Stamouli MJ, Panani AD, Raptis SA, Young BD. Molecular cytogenetic analysis of breast cancer: a combined multicolor fluorescence in situ hybridization and G-banding study of uncultured tumor cells. ACTA ACUST UNITED AC 2004; 149:28-37. [PMID: 15104280 DOI: 10.1016/s0165-4608(03)00270-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2003] [Revised: 06/03/2003] [Accepted: 06/11/2003] [Indexed: 10/26/2022]
Abstract
In six patients with breast cancer, uncultured tumor cells were investigated with G-banding and multicolor fluorescence in situ hybridization (M-FISH). A large number of numerical and structural aberrations could be analyzed. Among other structural abnormalities, reciprocal, hidden and complex translocations were found. Recurrent t(1;10) and t(6;16), not previously described, were identified, as well as t(15;22). The latter was also found in additional cases among our unpublished breast carcinomas. The significance of t(15;22) for breast cancer is discussed, taking into account also data drawn from the literature. Reciprocal translocations were a prominent feature in a pseudodiploid lobular carcinoma. Hidden translocations on 6p22-p24 were detected with M-FISH. Involvement of 6p22-p24 was observed in five cases. The analysis of various other translocations and different structural abnormalities revealed the following common breakpoints (according to frequency of involvement): 1p34-p36, 3p12-p13, 4p13-->q11, 14p11-->q11, 1q42, 8p11, 8q24, 10q22, 11q13, 11q23-q24, 13q13, and 18p10-p11. Loss of 3p and 1p34-p36-->pter and complete or partial loss of 13q and chromosome 17 were also found. With the combination of G-banding and M-FISH techniques, chromosome misclassification is avoided and the characterization of complex tumor karyotypes is more effective.
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Affiliation(s)
- Angeliki D Ferti
- Department of Internal Medicine, Sotiria Hospital, Messogion 152, Athens 11527, Greece.
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Stamouli MI, Panani AD, Ferti AD, Petraki C, Oliver RTD, Raptis SA, Young BD. Detection of genetic alterations in primary bladder carcinoma with dual-color and multiplex fluorescence in situ hybridization. ACTA ACUST UNITED AC 2004; 149:107-13. [PMID: 15036885 DOI: 10.1016/s0165-4608(03)00303-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2003] [Revised: 07/02/2003] [Accepted: 07/14/2003] [Indexed: 12/22/2022]
Abstract
Cytogenetic studies of bladder cancer have shown several nonrandom aberrations. Numerical aberrations of both sex chromosomes were investigated in 32 primary bladder tumors with bicolor fluorescence in situ hybridization (FISH). Loss of chromosome Y and overrepresentation of chromosome X were observed in subgroups of male patients. Chromosome X was represented normally in female patients. Two of the above primary bladder tumors, a transitional cell carcinoma (TCC) and an adenocarcinoma, were further analyzed with both multiplex FISH (24-color M-FISH) and G-banding. Both cases exhibited 1) common breakpoints on 5q11 approximately q12 and 15q24; 2) involvement of the pericentromeric area of chromosome 13; 3) structural abnormalities of chromosomes 8 and 17, with loss of material on the short arm; 4) structural abnormalities involving chromosome 11; and 5) loss of chromosome Y. The TCC case also exhibited structural abnormalities of chromosome 9, resulting in loss of 9q. The combined G-banding and M-FISH findings could help reveal regions potentially involved in bladder tumorigenesis.
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Affiliation(s)
- Maria I Stamouli
- Second Department of Internal Medicine-Propaedeutic, Research Unit, University of Athens, Evangelismos Hospital, Ipsilantou 45-47, Athens 10676, Greece
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