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Assumpção PB, Canelas EC, Ramos AC, Anaissi A, Acioli JF, Ishak G, Santos S, Demachki S, Assumpção P. Lymph nodes may be a source for immunetherapy in gastric cancer. Oncotarget 2020; 11:1729-1736. [PMID: 32477462 PMCID: PMC7233812 DOI: 10.18632/oncotarget.27578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 04/10/2020] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND adoptive immunotherapy is a promising cancer therapy. Immune cells are capable of recognizing and destroying cancer cells and represent a powerful strategy, however, this approach remains technically complicated, due to the need to select and isolate immune cells from these, present cancer antigens to those cells, expanding and reinjecting them. Lymph nodes recovered during gastric cancer surgery may represent an option for immunotherapy, since they harbor an enormous amount of immune cells, which have already been presented to cancer antigens. The advantage of selecting only cancer-negative lymph has not been determined yet. The status of immune checkpoints in the immune cells within the lymph nodes was analyzed in order to try to solve this problem. MATERIALS AND METHODS Tissue microarrays were constructed and automated immunostaining for PD-1 and PD-L1 was performed on 143 lymph nodes from 70 patients with gastric adenocarcinoma. RESULTS In positive nodes, PD-L1 was only positivity in cancer cells (6%) and PD-1 was positive for B lymphocytes (60%), T lymphocytes (70%) and one case in cancer cells (2.5%). In negative nodes, most cases were positive for PD-1 in B (73.1%) and T (71.65%) lymphocytes. CONCLUSIONS Expression of PD-1 and PD-L1 in gastric cancer lymph nodes was demonstrated for the first time. PD-1 is expressed in positive and negative nodes, which could activate the PD-1 pathway. Lymphocytes from tumor-free lymph nodes were negative for PD-L1, and this might represent an advantage for selecting these lymph nodes as a potential source of immune cells for adoptive immunotherapy.
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Affiliation(s)
- Paula Baraúna Assumpção
- Laboratório Genética Humana e Médica, Universidade Federal do Pará, Belém-PA, Brasil.,Núcleo de Pesquisas em Oncologia, Hospital Universitário João de Barros Barreto, Belém-PA, Brasil
| | - Erika Couto Canelas
- Núcleo de Pesquisas em Oncologia, Hospital Universitário João de Barros Barreto, Belém-PA, Brasil
| | - Aline Cruz Ramos
- Núcleo de Pesquisas em Oncologia, Hospital Universitário João de Barros Barreto, Belém-PA, Brasil
| | - Ana Anaissi
- Núcleo de Pesquisas em Oncologia, Hospital Universitário João de Barros Barreto, Belém-PA, Brasil.,Instituto de Ciências da Saúde, Universidade Federal do Pará, Belém-PA, Brasil
| | - João Felipe Acioli
- Núcleo de Pesquisas em Oncologia, Hospital Universitário João de Barros Barreto, Belém-PA, Brasil.,Serviço de Cirurgia do Hospital Universitário João do Barros Barreto, Belém-PA, Brasil
| | - Geraldo Ishak
- Núcleo de Pesquisas em Oncologia, Hospital Universitário João de Barros Barreto, Belém-PA, Brasil.,Serviço de Cirurgia do Hospital Universitário João do Barros Barreto, Belém-PA, Brasil
| | - Sidney Santos
- Laboratório Genética Humana e Médica, Universidade Federal do Pará, Belém-PA, Brasil.,Núcleo de Pesquisas em Oncologia, Hospital Universitário João de Barros Barreto, Belém-PA, Brasil
| | - Samia Demachki
- Núcleo de Pesquisas em Oncologia, Hospital Universitário João de Barros Barreto, Belém-PA, Brasil.,Instituto de Ciências da Saúde, Universidade Federal do Pará, Belém-PA, Brasil
| | - Paulo Assumpção
- Núcleo de Pesquisas em Oncologia, Hospital Universitário João de Barros Barreto, Belém-PA, Brasil
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Assumpção P, Araújo T, Khayat A, Ishak G, Santos S, Barra W, Acioli JF, Rossi B, Assumpção P. Hereditary gastric cancer: Three rules to reduce missed diagnoses. World J Gastroenterol 2020; 26:1382-1393. [PMID: 32308342 PMCID: PMC7152522 DOI: 10.3748/wjg.v26.i13.1382] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 02/17/2020] [Accepted: 03/09/2020] [Indexed: 02/06/2023] Open
Abstract
Gastric cancer remains one of the most lethal cancers. The incidence and mortality rates are quite similar. The main reason for the high mortality is diagnosis at advanced stages of disease, when treatment options are poor. One of the supposed strategies to overcome late-stage diagnosis is identifying people at high risk with the aim of establishing rigorous clinical control, including routine endoscopy and biopsies. Hereditary gastric cancer (HGC) syndromes, though representing a sizeable group to monitor for prevention or, at least, for early diagnosis, are apparently extremely rare. The low rate of HGC diagnosis might be related to the low rates of suspicion, insufficient familiarity about clinical diagnosis criteria, and the supposed conditional necessity of a molecular diagnosis. In this review, we will discuss simple measures to increase HGC diagnosis by applying three rules that might provide an opportunity for precision care to benefit the families affected by this disease.
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Affiliation(s)
- Paula Assumpção
- Programa de Pós-Graduação em Genética e Biologia Molecular, Universidade Federal do Pará, Belém 66075-110, Brazil
| | - Taíssa Araújo
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém 66073-000, Brazil
| | - André Khayat
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém 66073-000, Brazil
| | - Geraldo Ishak
- Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém 66073-000, Brazil
| | - Sidney Santos
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém 66073-000, Brazil
| | - Williams Barra
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém 66073-000, Brazil
| | - João Felipe Acioli
- Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém 66073-000, Brazil
| | - Benedito Rossi
- Centro de Oncologia e Aconselhamento Genético, Hospital Sírio Libanês, São Paulo 01308-050, Brazil
| | - Paulo Assumpção
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém 66073-000, Brazil
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Pereira A, Moreira F, Vinasco-Sandoval T, Cunha A, Vidal A, Ribeiro-dos-Santos AM, Pinto P, Magalhães L, Assumpção M, Demachki S, Santos S, Assumpção P, Ribeiro-dos-Santos Â. miRNome Reveals New Insights Into the Molecular Biology of Field Cancerization in Gastric Cancer. Front Genet 2019; 10:592. [PMID: 31275362 PMCID: PMC6593062 DOI: 10.3389/fgene.2019.00592] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 06/04/2019] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND MicroRNAs (miRNAs) play an important role in gastric carcinogenesis and have been associated with gastric field cancerization; however, their role is not fully understood in this process. We performed the miRNome sequencing of non-cancerous, adjacent to tumor and gastric cancer samples to understand the involvement of these small RNAs in gastric field cancerization. METHODS We analyzed samples of patients without cancer as control (non-cancerous gastric samples) and adjacent to cancer and gastric cancer paired samples, and considered miRNAs with |log2(fold change)| > 2 and Padj < 0.05 to be statistically significant. The identification of target genes, functional analysis and enrichment in KEGG pathways were realized in the TargetCompare, miRTargetLink, and DAVID tools. We also performed receiver operating characteristic (ROC) curves and miRNAs that had an AUC > 0.85 were considered to be potential biomarkers. RESULTS We found 14 miRNAs exclusively deregulated in gastric cancer, of which six have potential diagnostic value for advanced disease. Nine miRNAs with known tumor suppressor activities (TS-miRs) were deregulated exclusively in adjacent tissue. Of these, five have potential diagnostic value for the early stages of gastric cancer. Functional analysis of these TS-miRs revealed that they regulate important cellular signaling pathways (PI3K-Akt, HIF-1, Ras, Rap1, ErbB, and MAPK signaling pathways), that are involved in gastric carcinogenesis. Seven miRNAs were differentially expressed in both gastric cancer and adjacent regarding to non-cancerous tissues; among them, hsa-miR-200a-3p and hsa-miR-873-5p have potential diagnostic value for early and advanced stages of the disease. Only hsa-miR-196a-5p was differentially expressed between adjacent to cancer and gastric cancer tissues. In addition, the other miRNAs identified in this study were not differentially expressed between adjacent to cancer and gastric cancer, suggesting that these tissues are very similar and that share these molecular changes. CONCLUSION Our results show that gastric cancer and adjacent tissues have a similar miRNA expression profile, indicating that studied miRNAs are intimately associated with field cancerization in gastric cancer. The overexpression of TS-miRs in adjacent tissues may be a barrier against tumorigenesis within these pre-cancerous conditions prior to the eventual formation or relapse of a tumor. Additionally, these miRNAs have a great accuracy in discriminating non-cancerous from adjacent to tumor and cancer tissues and can be potentially useful as biomarkers for gastric cancer.
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Affiliation(s)
- Adenilson Pereira
- Laboratory of Human and Medical Genetics, Institute of Biological Sciences, Graduate Program of Genetics and Molecular Biology, Federal University of Pará, Belém, Brazil
- Research Center on Oncology, Graduate Program of Oncology and Medical Science, Federal University of Pará, Belém, Brazil
| | - Fabiano Moreira
- Laboratory of Human and Medical Genetics, Institute of Biological Sciences, Graduate Program of Genetics and Molecular Biology, Federal University of Pará, Belém, Brazil
- Research Center on Oncology, Graduate Program of Oncology and Medical Science, Federal University of Pará, Belém, Brazil
| | - Tatiana Vinasco-Sandoval
- Research Center on Oncology, Graduate Program of Oncology and Medical Science, Federal University of Pará, Belém, Brazil
| | - Adenard Cunha
- Research Center on Oncology, Graduate Program of Oncology and Medical Science, Federal University of Pará, Belém, Brazil
| | - Amanda Vidal
- Research Center on Oncology, Graduate Program of Oncology and Medical Science, Federal University of Pará, Belém, Brazil
| | - André M. Ribeiro-dos-Santos
- Laboratory of Human and Medical Genetics, Institute of Biological Sciences, Graduate Program of Genetics and Molecular Biology, Federal University of Pará, Belém, Brazil
| | - Pablo Pinto
- Laboratory of Human and Medical Genetics, Institute of Biological Sciences, Graduate Program of Genetics and Molecular Biology, Federal University of Pará, Belém, Brazil
| | - Leandro Magalhães
- Laboratory of Human and Medical Genetics, Institute of Biological Sciences, Graduate Program of Genetics and Molecular Biology, Federal University of Pará, Belém, Brazil
| | - Mônica Assumpção
- Research Center on Oncology, Graduate Program of Oncology and Medical Science, Federal University of Pará, Belém, Brazil
| | - Samia Demachki
- Research Center on Oncology, Graduate Program of Oncology and Medical Science, Federal University of Pará, Belém, Brazil
| | - Sidney Santos
- Laboratory of Human and Medical Genetics, Institute of Biological Sciences, Graduate Program of Genetics and Molecular Biology, Federal University of Pará, Belém, Brazil
- Research Center on Oncology, Graduate Program of Oncology and Medical Science, Federal University of Pará, Belém, Brazil
| | - Paulo Assumpção
- Research Center on Oncology, Graduate Program of Oncology and Medical Science, Federal University of Pará, Belém, Brazil
| | - Ândrea Ribeiro-dos-Santos
- Laboratory of Human and Medical Genetics, Institute of Biological Sciences, Graduate Program of Genetics and Molecular Biology, Federal University of Pará, Belém, Brazil
- Research Center on Oncology, Graduate Program of Oncology and Medical Science, Federal University of Pará, Belém, Brazil
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4
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Assumpção P, Khayat A, Araújo T, Barra W, Ishak G, Cruz A, Santos S, Santos Â, Demachki S, Assumpção P, Calcagno D, Santos N, Assumpção M, Moreira F, Santos A, Assumpção C, Riggins G, Burbano R. The Small Bowel Cancer Incidence Enigma. Pathol Oncol Res 2019; 26:635-639. [PMID: 31165996 DOI: 10.1007/s12253-019-00682-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 05/31/2019] [Indexed: 11/30/2022]
Abstract
Although the small bowel is a vast organ with a highly proliferative epithelium, the incidence of small bowel cancers is surprisingly low. Many factors could be involved in this unexpected cancer incidence, including difficult access to the exploration of the small bowel mucosa, which might lead to missed diagnoses of non-obstructive and non-bleeding small tumours. Moreover, possible factors that influence the low incidence include more efficient machinery of DNA replication and DNA repair enzymes, peculiarities in microbiota components, competence of the immune system, and the speed of intestinal transit. Importantly, the answer for the enigmatic risk of driver mutations caused by replication errors may be hidden in the small bowel, which is an obscure part of digestive tract that is usually inaccessible by endoscopic or colonoscopic conventional investigations. These observations warrant the necessity of an urgent exploration of small bowel features, including the evaluation of DNA replication controls and expression of DNA repair genes, in order to shed light on these obscure events.
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Affiliation(s)
- Paulo Assumpção
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém, 66073-000, Brazil. .,Programa de Pós-Graduação em Genética e Biologia Molecular, Universidade Federal do Pará, Belém, 66075-110, Brazil.
| | - André Khayat
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém, 66073-000, Brazil
| | - Taíssa Araújo
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém, 66073-000, Brazil
| | - Williams Barra
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém, 66073-000, Brazil
| | - Geraldo Ishak
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém, 66073-000, Brazil
| | - Aline Cruz
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém, 66073-000, Brazil
| | - Sidney Santos
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém, 66073-000, Brazil
| | - Ândrea Santos
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém, 66073-000, Brazil
| | - Samia Demachki
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém, 66073-000, Brazil
| | - Paula Assumpção
- Programa de Pós-Graduação em Genética e Biologia Molecular, Universidade Federal do Pará, Belém, 66075-110, Brazil
| | - Danielle Calcagno
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém, 66073-000, Brazil
| | - Ney Santos
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém, 66073-000, Brazil
| | - Mônica Assumpção
- Serviço de Endoscopia Digestiva, Hospital Universitário João de Barros Barreto, Belém, 66073-000, Brazil
| | - Fabiano Moreira
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém, 66073-000, Brazil
| | - André Santos
- Programa de Pós-Graduação em Genética e Biologia Molecular, Universidade Federal do Pará, Belém, 66075-110, Brazil
| | - Carolina Assumpção
- Serviço de Cirurgia Oncológica, Hospital Alemão Oswaldo Cruz, São Paulo, 01327-001, Brazil
| | - Gregory Riggins
- Department of Neurosurgery, Johns Hopkins Hospital, Baltimore, MD, 21287, USA
| | - Rommel Burbano
- Laboratório de Biologia Molecular, Hospital Ophir Loyola, Belém, 66060-281, Brazil
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5
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Araújo T, Khayat A, Quintana L, Calcagno D, Mourão R, Modesto A, Paiva J, Lima A, Moreira F, Oliveira E, Souza M, Othman M, Liehr T, Abdelhay E, Gomes R, Santos S, Assumpção P. Piwi like RNA-mediated gene silencing 1 gene as a possible major player in gastric cancer. World J Gastroenterol 2018; 24:5338-5350. [PMID: 30598579 PMCID: PMC6305533 DOI: 10.3748/wjg.v24.i47.5338] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 09/07/2018] [Accepted: 10/05/2018] [Indexed: 02/06/2023] Open
Abstract
AIM To establish a permanent piwi like RNA-mediated gene silencing 1 (PIWIL1) gene knockout in AGP01 gastric cancer cell line using CRISPR-Cas9 system and analyze phenotypic modifications as well as gene expression alterations.
METHODS CRISPR-Cas9 system used was purchased from Dharmacon GE Life Sciences (Lafayette, CO, United States) and permanent knockout was performed according to manufacturer’s recommendations. Wound-healing assay was performed to investigate the effect of PIWIL1 knockout on migration capability of cells and Boyden chamber invasion assay was performed to investigate the effect on invasion capability. For the gene expression analysis, a one-color microarray-based gene expression analysis kit (Agilent Technologies, Santa Clara, CA, United States) was used according to the protocol provided by the manufacturer.
RESULTS PIWIL1 gene knockout caused a significant decrease in AGP01 migration capacity as well as a significant decrease in cell invasiveness. Moreover, functional analysis based on grouping of all differentially expressed mRNAs identified a total of 35 genes (5 up-regulated and 30 down-regulated) encoding proteins involved in cellular invasion and migration. According to current literature, 9 of these 35 genes (DOCK2, ZNF503, PDE4D, ABL1, ABL2, LPAR1, SMAD2, WASF3 and DACH1) are possibly related to the mechanisms used by PIWIL1 to promote carcinogenic effects related to migration and invasion, since their functions are consistent with the changes observed (being up- or down-regulated after knockout).
CONCLUSION Taken together, these data reinforce the idea that PIWIL1 plays a crucial role in the signaling pathway of gastric cancer, regulating several genes involved in migration and invasion processes; therefore, its use as a therapeutic target may generate promising results in the treatment of gastric cancer.
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Affiliation(s)
- Taíssa Araújo
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém 66073-000, Brazil
| | - André Khayat
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém 66073-000, Brazil
| | - Luciana Quintana
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém 66073-000, Brazil
| | - Danielle Calcagno
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém 66073-000, Brazil
| | - Ronald Mourão
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém 66073-000, Brazil
| | - Antônio Modesto
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém 66073-000, Brazil
| | - Juliana Paiva
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém 66073-000, Brazil
| | - Adhara Lima
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém 66073-000, Brazil
| | - Fabiano Moreira
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém 66073-000, Brazil
| | - Edivaldo Oliveira
- Laboratório de Cultura de Tecidos e Citogenética, Instituto Evandro Chagas, Belém 66087-082, Brazil
| | - Michel Souza
- Laboratório de Cultura de Tecidos e Citogenética, Instituto Evandro Chagas, Belém 66087-082, Brazil
| | - Moneeb Othman
- Institute of Human Genetics, Universitätsklinikum Jena, Jena 07747, Germany
| | - Thomas Liehr
- Institute of Human Genetics, Universitätsklinikum Jena, Jena 07747, Germany
| | - Eliana Abdelhay
- Laboratório de Célula Tronco, Centro de Transplante de Medula Óssea, Instituto Nacional de Câncer José Alencar Gomes da Silva, Rio de Janeiro 20230-130, Brazil
| | - Renata Gomes
- Laboratório de Célula Tronco, Centro de Transplante de Medula Óssea, Instituto Nacional de Câncer José Alencar Gomes da Silva, Rio de Janeiro 20230-130, Brazil
| | - Sidney Santos
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém 66073-000, Brazil
| | - Paulo Assumpção
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará, Belém 66073-000, Brazil
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6
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Binato R, Santos EC, Boroni M, Demachki S, Assumpção P, Abdelhay E. A common molecular signature of intestinal-type gastric carcinoma indicates processes related to gastric carcinogenesis. Oncotarget 2018; 9:7359-7371. [PMID: 29484116 PMCID: PMC5800908 DOI: 10.18632/oncotarget.23670] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 12/11/2017] [Indexed: 12/11/2022] Open
Abstract
Gastric carcinoma (GC) is one of the most aggressive cancers and the second leading cause of cancer death in the world. According to the Lauren classification, this adenocarcinoma is divided into two subtypes, intestinal and diffuse, which differ in their clinical, epidemiological and molecular features. Several studies have attempted to delineate the molecular signature of gastric cancer to develop new and non-invasive screening tests that improve diagnosis and lead to new treatment strategies. However, a consensus signature has not yet been identified for each condition. Thus, this work aimed to analyze the gene expression profile of Brazilian intestinal-type GC tissues using microarrays and compare the results to those of non-tumor tissue samples. Moreover, we compared our intestinal-type gastric carcinoma profile with those obtained from populations worldwide to assess their similarity. The results identified a molecular signature for intestinal-type GC and revealed that 38 genes differentially expressed in Brazilian intestinal-type gastric carcinoma samples can successfully distinguish gastric tumors from non-tumor tissue in the global population. These differentially expressed genes participate in biological processes important to cell homeostasis. Furthermore, Kaplan-Meier analysis suggested that 7 of these genes could individually be able to predict overall survival in intestinal-type gastric cancer patients.
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Affiliation(s)
- Renata Binato
- Laboratório de Célula tronco, Centro de Transplante de Medula Óssea (CEMO), Instituto Nacional de Câncer (INCA), Rio de Janeiro, RJ, Brazil
- Instituto Nacional de Ciência e Tecnologia Para o Controle do Câncer (INCT), Rio de Janeiro, RJ, Brazil
| | - Everton Cruz Santos
- Laboratório de Célula tronco, Centro de Transplante de Medula Óssea (CEMO), Instituto Nacional de Câncer (INCA), Rio de Janeiro, RJ, Brazil
- Instituto Nacional de Ciência e Tecnologia Para o Controle do Câncer (INCT), Rio de Janeiro, RJ, Brazil
| | - Mariana Boroni
- Laboratório de Bioinformática e Biologia Computacional, Instituto Nacional de Câncer (INCA), Rio de Janeiro, RJ, Brazil
| | - Samia Demachki
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará (UFPA), Belém, PA, Brazil
| | - Paulo Assumpção
- Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará (UFPA), Belém, PA, Brazil
| | - Eliana Abdelhay
- Laboratório de Célula tronco, Centro de Transplante de Medula Óssea (CEMO), Instituto Nacional de Câncer (INCA), Rio de Janeiro, RJ, Brazil
- Instituto Nacional de Ciência e Tecnologia Para o Controle do Câncer (INCT), Rio de Janeiro, RJ, Brazil
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7
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El-Husny A, Raiol-Moraes M, Amador M, Ribeiro-Dos-Santos AM, Montagnini A, Barbosa S, Silva A, Assumpção P, Ishak G, Santos S, Pinto P, Cruz A, Ribeiro-Dos-Santos Â. CDH1 mutations in gastric cancer patients from northern Brazil identified by Next- Generation Sequencing (NGS). Genet Mol Biol 2016; 39:189-98. [PMID: 27192129 PMCID: PMC4910547 DOI: 10.1590/1678-4685-gmb-2014-0342] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [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: 11/30/2014] [Accepted: 07/23/2015] [Indexed: 12/20/2022] Open
Abstract
Gastric cancer is considered to be the fifth highest incident tumor worldwide and the third leading cause of cancer deaths. Developing regions report a higher number of sporadic cases, but there are only a few local studies related to hereditary cases of gastric cancer in Brazil to confirm this fact. CDH1 germline mutations have been described both in familial and sporadic cases, but there is only one recent molecular description of individuals from Brazil. In this study we performed Next Generation Sequencing (NGS) to assess CDH1 germline mutations in individuals who match the clinical criteria for Hereditary Diffuse Gastric Cancer (HDGC), or who exhibit very early diagnosis of gastric cancer. Among five probands we detected CDH1 germline mutations in two cases (40%). The mutation c.1023T > G was found in a HDGC family and the mutation c.1849G > A, which is nearly exclusive to African populations, was found in an early-onset case of gastric adenocarcinoma. The mutations described highlight the existence of gastric cancer cases caused by CDH1 germline mutations in northern Brazil, although such information is frequently ignored due to the existence of a large number of environmental factors locally. Our report represent the first CDH1 mutations in HDGC described from Brazil by an NGS platform.
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Affiliation(s)
- Antonette El-Husny
- Laboratório de Genética Humana e Médica (LGHM), Instituto de Ciências Biológicas, Universidade Federal do Pará (UFPA), Belém, PA, Brazil.,Rede de Pesquisa em Genômica Populacional Humana, Universidade Federal do Pará (UFPA), Belém, PA, Brazil
| | - Milene Raiol-Moraes
- Laboratório de Genética Humana e Médica (LGHM), Instituto de Ciências Biológicas, Universidade Federal do Pará (UFPA), Belém, PA, Brazil.,Rede de Pesquisa em Genômica Populacional Humana, Universidade Federal do Pará (UFPA), Belém, PA, Brazil
| | - Marcos Amador
- Laboratório de Genética Humana e Médica (LGHM), Instituto de Ciências Biológicas, Universidade Federal do Pará (UFPA), Belém, PA, Brazil.,Rede de Pesquisa em Genômica Populacional Humana, Universidade Federal do Pará (UFPA), Belém, PA, Brazil
| | - André M Ribeiro-Dos-Santos
- Laboratório de Genética Humana e Médica (LGHM), Instituto de Ciências Biológicas, Universidade Federal do Pará (UFPA), Belém, PA, Brazil.,Rede de Pesquisa em Genômica Populacional Humana, Universidade Federal do Pará (UFPA), Belém, PA, Brazil
| | - André Montagnini
- Instituto Sírio-Libanês de Ensino e Pesquisa, Hospital Sírio-Libanês, São Paulo, SP, Brazil
| | - Silvanira Barbosa
- Laboratório de Polimorfismo de DNA - Instituto de Ciências Biológicas, Universidade Federal do Pará (UFPA), Belém, PA, Brazil
| | - Artur Silva
- Rede de Pesquisa em Genômica Populacional Humana, Universidade Federal do Pará (UFPA), Belém, PA, Brazil.,Laboratório de Polimorfismo de DNA - Instituto de Ciências Biológicas, Universidade Federal do Pará (UFPA), Belém, PA, Brazil
| | - Paulo Assumpção
- Rede de Pesquisa em Genômica Populacional Humana, Universidade Federal do Pará (UFPA), Belém, PA, Brazil.,Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará (UFPA), Belém, PA, Brazil
| | - Geraldo Ishak
- Rede de Pesquisa em Genômica Populacional Humana, Universidade Federal do Pará (UFPA), Belém, PA, Brazil.,Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará (UFPA), Belém, PA, Brazil.,Hospital Universitário João de Barros Barreto, Universidade Federal do Pará (UFPA), Belém, PA, Brazil
| | - Sidney Santos
- Laboratório de Genética Humana e Médica (LGHM), Instituto de Ciências Biológicas, Universidade Federal do Pará (UFPA), Belém, PA, Brazil.,Rede de Pesquisa em Genômica Populacional Humana, Universidade Federal do Pará (UFPA), Belém, PA, Brazil.,Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará (UFPA), Belém, PA, Brazil
| | - Pablo Pinto
- Laboratório de Genética Humana e Médica (LGHM), Instituto de Ciências Biológicas, Universidade Federal do Pará (UFPA), Belém, PA, Brazil.,Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará (UFPA), Belém, PA, Brazil
| | - Aline Cruz
- Laboratório de Genética Humana e Médica (LGHM), Instituto de Ciências Biológicas, Universidade Federal do Pará (UFPA), Belém, PA, Brazil.,Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará (UFPA), Belém, PA, Brazil
| | - Ândrea Ribeiro-Dos-Santos
- Laboratório de Genética Humana e Médica (LGHM), Instituto de Ciências Biológicas, Universidade Federal do Pará (UFPA), Belém, PA, Brazil.,Rede de Pesquisa em Genômica Populacional Humana, Universidade Federal do Pará (UFPA), Belém, PA, Brazil.,Núcleo de Pesquisas em Oncologia, Universidade Federal do Pará (UFPA), Belém, PA, Brazil
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8
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Assumpção MB, Moreira FC, Hamoy IG, Magalhães L, Vidal A, Pereira A, Burbano R, Khayat A, Silva A, Santos S, Demachki S, Ribeiro-Dos-Santos Â, Assumpção P. High-Throughput miRNA Sequencing Reveals a Field Effect in Gastric Cancer and Suggests an Epigenetic Network Mechanism. Bioinform Biol Insights 2015; 9:111-7. [PMID: 26244015 PMCID: PMC4496000 DOI: 10.4137/bbi.s24066] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 03/29/2015] [Accepted: 04/02/2015] [Indexed: 02/06/2023] Open
Abstract
Field effect in cancer, also called "field cancerization", attempts to explain the development of multiple primary tumors and locally recurrent cancer. The concept of field effect in cancer has been reinforced, since molecular alterations were found in tumor-adjacent tissues with normal histopatho-logical appearances. With the aim of investigating field effects in gastric cancer (GC), we conducted a high-throughput sequencing of the miRnome of four GC samples and their respective tumor-adjacent tissues and compared them with the miRnome of a gastric antrum sample from patients without GC, assuming that tumor-adjacent tissues could not be considered as normal tissues. The global number of miRNAs and read counts was highest in tumor samples, followed by tumor-adjacent and normal samples. Analyzing the miRNA expression profile of tumor-adjacent miRNA, hsa-miR-3131, hsa-miR-664, hsa-miR-483, and hsa-miR-150 were significantly downregulated compared with the antrum without tumor tissue (P-value < 0.01; fold-change <5). Additionally, hsa-miR-3131, hsa-miR-664, and hsa-miR-150 were downregulated (P-value < 0.001) in all paired samples of tumor and tumor-adjacent tissues, compared with antrum without tumor mucosa. The field effect was clearly demonstrated in gastric carcinogenesis by an epigenetics-based approach, and potential biomarkers of the GC field effect were identified. The elevated expression of miRNAs in adjacent tissues and tumors tissues may indicate that a cascade of events takes place during gastric carcinogenesis, reinforcing the notion of field effects. This phenomenon seems to be linked to DNA methylation patterns in cancer and suggests the involvement of an epigenetic network mechanism.
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Affiliation(s)
- Monica B Assumpção
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, PA, Brazil
| | - Fabiano C Moreira
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Centro Universitário do Estado do Pará, Belém, Pará, Brazil
| | - Igor G Hamoy
- Universidade Federal Rural da Amazônia, Capanema, PA, Brazil
| | - Leandro Magalhães
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Amanda Vidal
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Adenilson Pereira
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Rommel Burbano
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil
| | - André Khayat
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil
| | - Artur Silva
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Sidney Santos
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil
| | - Samia Demachki
- Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil. ; Instituto de Ciências da Saúde, Universidade Federal do Pará, Belém, PA, Brazil
| | - Ândrea Ribeiro-Dos-Santos
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil
| | - Paulo Assumpção
- Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, PA, Brazil. ; Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil
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9
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Darnet S, Moreira FC, Hamoy IG, Burbano R, Khayat A, Cruz A, Magalhães L, Silva A, Santos S, Demachki S, Assumpção M, Assumpção P, Ribeiro-Dos-Santos Â. High-Throughput Sequencing of miRNAs Reveals a Tissue Signature in Gastric Cancer and Suggests Novel Potential Biomarkers. Bioinform Biol Insights 2015; 9:1-8. [PMID: 26157332 PMCID: PMC4485834 DOI: 10.4137/bbi.s23773] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 03/29/2015] [Accepted: 04/01/2015] [Indexed: 12/14/2022] Open
Abstract
Gastric cancer has a high incidence and mortality rate worldwide; however, the use of biomarkers for its clinical diagnosis remains limited. The microRNAs (miRNAs) are biomarkers with the potential to identify the risk and prognosis as well as therapeutic targets. We performed the ultradeep miRnomes sequencing of gastric adenocarcinoma and gastric antrum without tumor samples. We observed that a small set of those samples were responsible for approximately 80% of the total miRNAs expression, which might represent a miRNA tissue signature. Additionally, we identified seven miRNAs exhibiting significant differences, and, of these, hsa-miR-135b and hsa-miR-29c were able to discriminate antrum without tumor from gastric cancer regardless of the histological type. These findings were validated by quantitative real-time polymerase chain reaction. The results revealed that hsa-miR-135b and hsa-miR-29c are potential gastric adenocarcinoma occurrence biomarkers with the ability to identify individuals at a higher risk of developing this cancer, and could even be used as therapeutic targets to allow individualized clinical management.
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Affiliation(s)
- Sylvain Darnet
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Fabiano C Moreira
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Área de Ciências Exatas e Tecnológicas, Centro Universitário do Pará, Belém, PA, Brazil
| | - Igor G Hamoy
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Universidade Federal Rural da Amazônia, Campus de Capanema, PA, Brazil
| | - Rommel Burbano
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil
| | - André Khayat
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil
| | - Aline Cruz
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Leandro Magalhães
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Artur Silva
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Sidney Santos
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil
| | - Samia Demachki
- Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil. ; Instituto de Ciências da Saúde, Universidade Federal do Pará, Belém, PA, Brazil
| | - Monica Assumpção
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, PA, Brazil
| | - Paulo Assumpção
- Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil. ; Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, PA, Brazil
| | - Ândrea Ribeiro-Dos-Santos
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil. ; Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brazil
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Gomes LL, Moreira FC, Hamoy IG, Santos S, Assumpção P, Santana ÁL, Ribeiro-dos-Santos Â. Identification of miRNAs Expression Profile in Gastric Cancer Using Self-Organizing Maps (SOM). Bioinformation 2014; 10:246-50. [PMID: 24966529 PMCID: PMC4070031 DOI: 10.6026/97320630010246] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 04/15/2014] [Indexed: 12/13/2022] Open
Abstract
In this paper, an unsupervised artificial neural network was implemented to identify the patters of specific signatures. The network was based on the differential expression of miRNAs (under or over expression) found in healthy or cancerous gastric tissues. Among the tissues analyzes, the neural network evaluated 514 miRNAs of gastric tissue that exhibited significant differential expression. The result suggested a specific expression signature nine miRNAs (hsa-mir-21, hsa-mir-29a, hsa-mir-29c, hsa-mir-148a, hsa-mir-141, hsa-let-7b, hsa-mir-31, hsa-mir-451, and hsa-mir-192), all with significant values (p-value < 0.01 and fold change > 5) that clustered the samples into two groups: healthy tissue and gastric cancer tissue. The results obtained "in silico" must be validated in a molecular biology laboratory; if confirmed, this method may be used in the future as a risk marker for gastric cancer development.
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Affiliation(s)
- Larissa Luz Gomes
- Laboratório de Genética Humana e Médica, Universidade Federal do Pará, Belém, Pará, Brasil
- Instituto de Estudos Superiores da Amazônia, Belém, Pará, Brasil
| | - Fabiano Cordeiro Moreira
- Laboratório de Genética Humana e Médica, Universidade Federal do Pará, Belém, Pará, Brasil
- Centro Universitário do Estado do Pará, Belém, Pará, Brasil
| | - Igor Guerreiro Hamoy
- Laboratório de Genética Humana e Médica, Universidade Federal do Pará, Belém, Pará, Brasil
- Universidade Federal Rural da Amazônia, Campus de Capanema, Pará, Brasil
| | - Sidney Santos
- Laboratório de Genética Humana e Médica, Universidade Federal do Pará, Belém, Pará, Brasil
- Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, Pará, Brasil
| | - Paulo Assumpção
- Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, Pará, Brasil
- Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, PA, Brazil
| | - Ádamo L. Santana
- Laboratory of High Performance Networks Planning, Federal University of Pará, Belém, Pará, Brazil
| | - Ândrea Ribeiro-dos-Santos
- Laboratório de Genética Humana e Médica, Universidade Federal do Pará, Belém, Pará, Brasil
- Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, Pará, Brasil
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11
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Moreira FC, Assumpção M, Hamoy IG, Darnet S, Burbano R, Khayat A, Gonçalves AN, Alencar DO, Cruz A, Magalhães L, Araújo Jr. W, Silva A, Santos S, Demachki S, Assumpção P, Ribeiro-dos-Santos Â. MiRNA expression profile for the human gastric antrum region using ultra-deep sequencing. PLoS One 2014; 9:e92300. [PMID: 24647245 PMCID: PMC3960242 DOI: 10.1371/journal.pone.0092300] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 02/20/2014] [Indexed: 12/25/2022] Open
Abstract
Background MicroRNAs are small non-coding nucleotide sequences that regulate gene expression. These structures are fundamental to several biological processes, including cell proliferation, development, differentiation and apoptosis. Identifying the expression profile of microRNAs in healthy human gastric antrum mucosa may help elucidate the miRNA regulatory mechanisms of the human stomach. Methodology/Principal Findings A small RNA library of stomach antrum tissue was sequenced using high-throughput SOLiD sequencing technology. The total read count for the gastric mucosa antrum region was greater than 618,000. After filtering and aligning using with MirBase, 148 mature miRNAs were identified in the gastric antrum tissue, totaling 3,181 quality reads; 63.5% (2,021) of the reads were concentrated in the eight most highly expressed miRNAs (hsa-mir-145, hsa-mir-29a, hsa-mir-29c, hsa-mir-21, hsa-mir-451a, hsa-mir-192, hsa-mir-191 and hsa-mir-148a). RT-PCR validated the expression profiles of seven of these highly expressed miRNAs and confirmed the sequencing results obtained using the SOLiD platform. Conclusions/Significance In comparison with other tissues, the antrum’s expression profile was unique with respect to the most highly expressed miRNAs, suggesting that this expression profile is specific to stomach antrum tissue. The current study provides a starting point for a more comprehensive understanding of the role of miRNAs in the regulation of the molecular processes of the human stomach.
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Affiliation(s)
| | - Monica Assumpção
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
- Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, PA, Brasil
| | - Igor G. Hamoy
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
- Universidade Federal Rural da Amazônia, Capanema, PA, Brasil
| | - Sylvain Darnet
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
| | - Rommel Burbano
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
- Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brasil
| | - André Khayat
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
- Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brasil
| | | | - Dayse O. Alencar
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
| | - Aline Cruz
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
- Secretaria Estadual de Saúde do Estado do Pará, Belém, PA, Brasil
| | - Leandro Magalhães
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
| | - Wilson Araújo Jr.
- Centro Regional de Hemoterapia, Faculdade Medicina Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brasil
| | - Artur Silva
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
| | - Sidney Santos
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
- Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brasil
| | - Samia Demachki
- Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brasil
- Instituto de Ciências da Saúde, Universidade Federal do Pará, Belém, PA, Brasil
| | - Paulo Assumpção
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
- Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, PA, Brasil
| | - Ândrea Ribeiro-dos-Santos
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brasil
- Núcleo de Pesquisa em Oncologia, Universidade Federal do Pará, Belém, PA, Brasil
- * E-mail:
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Zilberstein B, Malheiros C, Lourenço LG, Kassab P, Jacob CE, Weston AC, Bresciani CJC, Castro O, Gama-Rodrigues J, Borin AA, Buchpiegel C, Montagnini A, Leite CV, Deutsch CR, Kruel CDP, Mucerino D, Wohnrath D, Ilias E, Mrué F, Maluf-Filho F, Rocha F, de Souza F, Tomasich FS, Ishak G, Laporte G, de Souza HP, Cecconello I, Eisig J, Ohana J, Sabagga J, del Grande JC, de Jesus JP, Soares J, Dias LAN, Moreira LF, Correa M, Carvalho M, Andreollo NA, Áquila ND, Czeczko NG, Kruel N, Forones NM, da Motta OM, Malafaia O, Assumpção P, Leonardi P, Sakai P, Rocha PRS, Colleoni R, Gurgel R, Coral RP, Chalub S, Ribeiro- Junior U, Alves VAF, Vasquez VDL, Nadalin V. Brazilian consensus in gastric cancer: guidelines for gastric cancer in Brazil. Arq Bras Cir Dig 2014; 26:2-6. [PMID: 23702862 DOI: 10.1590/s0102-67202013000100002] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Accepted: 11/16/2012] [Indexed: 12/18/2022]
Abstract
BACKGROUND In Brazil, gastric cancer is the fourth most common malignancy among men and sixth among women. The cause is multivariate and the risks are well known. It has prognosis and treatment defined by the location and staging of the tumor and number of lymph nodes resected and involved. AIM The Brazilian Consensus on Gastric Cancer promoted by ABCG was designed with the intention to issue guidelines that can guide medical professionals to care for patients with this disease. METHODS Were summarized and answered 43 questions reflecting consensus or not on diagnosis and treatment that may be used as guidance for its multidisciplinary approach. The method involved three steps. Initially, 56 digestive surgeons and related medical specialties met to formulate the questions that were sent to participants for answers on scientific evidence and personal experience. Summaries were presented, discussed and voted in plenary in two other meetings. They covered 53 questions involving: diagnosis and staging (six questions); surgical treatment (35 questions); chemotherapy and radiotherapy (seven questions) and anatomopathology, immunohistochemistry and perspective (five questions). It was considered consensus agreement on more than 70% of the votes in each item. RESULTS All the answers were presented and voted upon, and in 42 there was consensus. CONCLUSION It could be developed consensus on most issues that come with the care of patients with gastric cancer and they can be transformed in guidelines.
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Ribeiro-dos-Santos Â, Khayat AS, Silva A, Alencar DO, Lobato J, Luz L, Pinheiro DG, Varuzza L, Assumpção M, Assumpção P, Santos S, Zanette DL, Silva WA, Burbano R, Darnet S. Ultra-deep sequencing reveals the microRNA expression pattern of the human stomach. PLoS One 2010; 5:e13205. [PMID: 20949028 PMCID: PMC2951895 DOI: 10.1371/journal.pone.0013205] [Citation(s) in RCA: 56] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2010] [Accepted: 09/08/2010] [Indexed: 02/06/2023] Open
Abstract
Background While microRNAs (miRNAs) play important roles in tissue differentiation and in maintaining basal physiology, little is known about the miRNA expression levels in stomach tissue. Alterations in the miRNA profile can lead to cell deregulation, which can induce neoplasia. Methodology/Principal Findings A small RNA library of stomach tissue was sequenced using high-throughput SOLiD sequencing technology. We obtained 261,274 quality reads with perfect matches to the human miRnome, and 42% of known miRNAs were identified. Digital Gene Expression profiling (DGE) was performed based on read abundance and showed that fifteen miRNAs were highly expressed in gastric tissue. Subsequently, the expression of these miRNAs was validated in 10 healthy individuals by RT-PCR showed a significant correlation of 83.97% (P<0.05). Six miRNAs showed a low variable pattern of expression (miR-29b, miR-29c, miR-19b, miR-31, miR-148a, miR-451) and could be considered part of the expression pattern of the healthy gastric tissue. Conclusions/Significance This study aimed to validate normal miRNA profiles of human gastric tissue to establish a reference profile for healthy individuals. Determining the regulatory processes acting in the stomach will be important in the fight against gastric cancer, which is the second-leading cause of cancer mortality worldwide.
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Assumpção P. [Role of the dental surgeon in the process of health education]. Arq Cent Estud Fac Odontol UFMG (Belo Horiz) 1966; 3:7-12. [PMID: 5221712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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