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Wang FR, Wei YC, Han ZJ, He WT, Guan XY, Chen H, Li YM. Aberrant DNA-PKcs and ERGIC1 expression may be involved in initiation of gastric cancer. World J Gastroenterol 2017; 23:6119-6127. [PMID: 28970727 PMCID: PMC5597503 DOI: 10.3748/wjg.v23.i33.6119] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 06/14/2017] [Accepted: 08/02/2017] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the molecular mechanisms of gastric carcinogenesis.
METHODS We used label-free quantification technology integrated with liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis to identify differentially expressed proteins in 160 specimens of normal gastric mucosa, gastric mucosa with mild dysplasia, moderate dysplasia, severe dysplasia, and early mucosal gastric cancer (GC) collected at the Second Hospital of Lanzhou University from 2010 to 2015. Immunohistochemistry was used to verify the differentially expressed proteins detected by LC-MS/MS.
RESULTS With a threshold of a 1.2-fold change and a P-value < 0.05 between mild dysplasia, moderate dysplasia, severe dysplasia or early mucosal GC and matched normal gastric mucosa tissues, proteomic analysis identified 365 significantly differentially expressed proteins. ERGIC1 expression decreased, while DNA-PKcs expression increased gradually along with different stages of GC initiation based on the tendency of fold change. The expression patterns of ERGIC1 and DNA-PKcs revealed by immunohistochemistry were consistent with the LC-MS/MS results.
CONCLUSION The results suggest that aberrant ERGIC1 and DNA-PKcs expression may be involved in GC initiation.
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Affiliation(s)
- Fu-Rong Wang
- School of Life Sciences, Lanzhou University, Lanzhou 730000, Gansu Province, China
- Department of Pathology, Second Hospital of Lanzhou University, Lanzhou 730000, Gansu Province, China
| | - Yu-Cai Wei
- Department of General Surgery, Second Hospital of Lanzhou University, Lanzhou 730000, Gansu Province, China
| | - Zhi-Jian Han
- The Key Laboratory of the Digestive System Tumors of Gansu Province, Second Hospital of Lanzhou University, Lanzhou 730000, Gansu Province, China
| | - Wen-Ting He
- The Key Laboratory of the Digestive System Tumors of Gansu Province, Second Hospital of Lanzhou University, Lanzhou 730000, Gansu Province, China
| | - Xiao-Ying Guan
- Department of Pathology, Second Hospital of Lanzhou University, Lanzhou 730000, Gansu Province, China
| | - Hao Chen
- Department of General Surgery, Second Hospital of Lanzhou University, Lanzhou 730000, Gansu Province, China
| | - Yu-Min Li
- School of Life Sciences, Lanzhou University, Lanzhou 730000, Gansu Province, China
- Department of General Surgery, Second Hospital of Lanzhou University, Lanzhou 730000, Gansu Province, China
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Camargo M, Intasqui P, Bertolla RP. Proteomic profile of seminal plasma in adolescents and adults with treated and untreated varicocele. Asian J Androl 2016; 18:194-201. [PMID: 26643563 PMCID: PMC4770485 DOI: 10.4103/1008-682x.168788] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Varicocele, the most important treatable cause of male infertility, is present in 15% of adult males, 35% of men with primary infertility, and 80% of men with secondary infertility. On the other hand, 80% of these men will not present infertility. Therefore, there is a need to differentiate a varicocele that is exerting a deleterious effect that is treatable from a “silent” varicocele. Despite the growing evidence of the cellular effects of varicocele, its underlying molecular mechanisms are still eluding. Proteomics has become a promising area to determine the reproductive biology of semen as well as to improve diagnosis of male infertility. This review aims to discuss the state-of-art in seminal plasma proteomics in patients with varicocele to discuss the challenges in undertaking these studies, as well as the future outlook derived from the growing body of evidence on the seminal proteome.
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Affiliation(s)
| | | | - Ricardo Pimenta Bertolla
- Department of Surgery, Division of Urology, Human Reproduction Section, Sao Paulo Federal University, R. Embau, 231, 04039-060; Sao Paulo Hospital, Sao Paulo, Brazil
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Leal MF, Wisnieski F, de Oliveira Gigek C, do Santos LC, Calcagno DQ, Burbano RR, Smith MC. What gastric cancer proteomic studies show about gastric carcinogenesis? Tumour Biol 2016; 37:9991-10010. [PMID: 27126070 DOI: 10.1007/s13277-016-5043-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 03/28/2016] [Indexed: 12/26/2022] Open
Abstract
Gastric cancer is a complex, heterogeneous, and multistep disease. Over the past decades, several studies have aimed to determine the molecular factors that lead to gastric cancer development and progression. After completing the human genome sequencing, proteomic technologies have presented rapid progress. Differently from the relative static state of genome, the cell proteome is dynamic and changes in pathologic conditions. Proteomic approaches have been used to determine proteome profiles and identify differentially expressed proteins between groups of samples, such as neoplastic and nonneoplastic samples or between samples of different cancer subtypes or stages. Therefore, proteomic technologies are a useful tool toward improving the knowledge of gastric cancer molecular pathogenesis and the understanding of tumor heterogeneity. This review aimed to summarize the proteins or protein families that are frequently identified by using high-throughput screening methods and which thus may have a key role in gastric carcinogenesis. The increased knowledge of gastric carcinogenesis will clearly help in the development of new anticancer treatments. Although the studies are still in their infancy, the reviewed proteins may be useful for gastric cancer diagnosis, prognosis, and patient management.
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Affiliation(s)
- Mariana Ferreira Leal
- Departamento de Ortopedia e Traumatologia, Universidade Federal de São Paulo, 04038-032, São Paulo, São Paulo, Brazil. .,Disciplina de Genética, Universidade Federal de São Paulo (UNIFESP), Rua Botucatu, 740, Edifício Leitão da Cunha - 1° andar, CEP 04023-900, São Paulo, Brazil.
| | - Fernanda Wisnieski
- Disciplina de Genética, Universidade Federal de São Paulo (UNIFESP), Rua Botucatu, 740, Edifício Leitão da Cunha - 1° andar, CEP 04023-900, São Paulo, Brazil
| | - Carolina de Oliveira Gigek
- Disciplina de Genética, Universidade Federal de São Paulo (UNIFESP), Rua Botucatu, 740, Edifício Leitão da Cunha - 1° andar, CEP 04023-900, São Paulo, Brazil
| | - Leonardo Caires do Santos
- Disciplina de Genética, Universidade Federal de São Paulo (UNIFESP), Rua Botucatu, 740, Edifício Leitão da Cunha - 1° andar, CEP 04023-900, São Paulo, Brazil
| | - Danielle Queiroz Calcagno
- Núcleo de Pesquisas em Oncologia, Hospital Universitário João de Barros Barreto, 66073-000, Belém, Pará, Brazil
| | - Rommel Rodriguez Burbano
- Laboratório de Citogenética Humana, Instituto de Ciências Biológicas, Universidade Federal do Pará, 66075-110, Belém, Pará, Brazil
| | - Marilia Cardoso Smith
- Disciplina de Genética, Universidade Federal de São Paulo (UNIFESP), Rua Botucatu, 740, Edifício Leitão da Cunha - 1° andar, CEP 04023-900, São Paulo, Brazil
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Zhou J, Wang W, Xie Y, Zhao Y, Chen X, Xu W, Wang Y, Guan Z. Proteomics-Based Identification and Analysis of Proteins Associated with Helicobacter pylori in Gastric Cancer. PLoS One 2016; 11:e0146521. [PMID: 26745502 PMCID: PMC4706351 DOI: 10.1371/journal.pone.0146521] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 12/19/2015] [Indexed: 01/22/2023] Open
Abstract
Helicobacter pylori (H. pylori) is a spiral-shaped Gram-negative bacterium that causes the most common chronic infection in the human stomach. Approximately 1%-3% of infected individuals develop gastric cancer. However, the mechanisms by which H. pylori induces gastric cancer are not completely understood. The available evidence indicates a strong link between the virulence factor of H. pylori, cytotoxin-associated gene A (CagA), and gastric cancer. To further characterize H. pylori virulence, we established three cell lines by infecting the gastric cancer cell lines SGC-7901 and AGS with cagA+H. pylori and transfecting SGC-7901 with a vector carrying the full-length cagA gene. We detected 135 differently expressed proteins from the three cell lines using proteome technology, and 10 differential proteins common to the three cell lines were selected and identified by LC-MS/MS as well as verified by western blot: β-actin, L-lactate dehydrogenase (LDH), dihydrolipoamide dehydrogenase (DLD), pre-mRNA-processing factor 19 homolog (PRPF19), ATP synthase, calmodulin (CaM), p64 CLCP, Ran-specific GTPase-activating protein (RanGAP), P43 and calreticulin. Detection of the expression of these proteins and genes encoding these proteins in human gastric cancer tissues by real-time PCR (RT-qPCR) and western blot revealed that the expression of β-ACTIN, LDH, DLD, PRPF19 and CaM genes were up-regulated and RanGAP was down-regulated in gastric cancer tissues and/or metastatic lymph nodes compared to peri-cancerous tissues. High gene expression was observed for H. pylori infection in gastric cancer tissues. Furthermore, the LDH, DLD and CaM genes were demethylated at the promoter -2325, -1885 and -276 sites, respectively, and the RanGAP gene was highly methylated at the promoter -570 and -170 sites in H. pylori-infected and cagA-overexpressing cells. These results provide new insights into the molecular pathogenesis and treatment targets for gastric cancer with H. pylori infection.
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Affiliation(s)
- Jianjiang Zhou
- Molecular Biology Key Laboratory, Guizhou Medical University, Guiyang, Guizhou, China
- Department of Clinical Laboratory, Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, China
- * E-mail:
| | - Wenling Wang
- Department of Oncology, Guizhou Cancer Hospital, Guiyang, Guizhou, China
| | - Yuan Xie
- Molecular Biology Key Laboratory, Guizhou Medical University, Guiyang, Guizhou, China
| | - Yan Zhao
- Molecular Biology Key Laboratory, Guizhou Medical University, Guiyang, Guizhou, China
| | - Xian Chen
- Molecular Biology Key Laboratory, Guizhou Medical University, Guiyang, Guizhou, China
| | - Wenjie Xu
- Molecular Biology Key Laboratory, Guizhou Medical University, Guiyang, Guizhou, China
| | - Yan Wang
- Molecular Biology Key Laboratory, Guizhou Medical University, Guiyang, Guizhou, China
| | - Zhizhong Guan
- Molecular Biology Key Laboratory, Guizhou Medical University, Guiyang, Guizhou, China
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Camargo M, Intasqui P, Bertolla RP. Proteomic profile of seminal plasma in adolescents and adults with treated and untreated varicocele. Asian J Androl 2015. [PMID: 26643563 DOI: 10.4103/1008-682χ.168788] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Varicocele, the most important treatable cause of male infertility, is present in 15% of adult males, 35% of men with primary infertility, and 80% of men with secondary infertility. On the other hand, 80% of these men will not present infertility. Therefore, there is a need to differentiate a varicocele that is exerting a deleterious effect that is treatable from a "silent" varicocele. Despite the growing evidence of the cellular effects of varicocele, its underlying molecular mechanisms are still eluding. Proteomics has become a promising area to determine the reproductive biology of semen as well as to improve diagnosis of male infertility. This review aims to discuss the state-of-art in seminal plasma proteomics in patients with varicocele to discuss the challenges in undertaking these studies, as well as the future outlook derived from the growing body of evidence on the seminal proteome.
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Affiliation(s)
| | | | - Ricardo Pimenta Bertolla
- Department of Surgery, Division of Urology, Human Reproduction Section, Sao Paulo Federal University, R. Embau, 231, 04039-060; Sao Paulo Hospital, Sao Paulo, Brazil
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Serum peptidome profiling in patients with gastric cancer. Clin Exp Med 2011; 12:79-87. [PMID: 21739109 DOI: 10.1007/s10238-011-0149-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Accepted: 06/13/2011] [Indexed: 12/16/2022]
Abstract
To identify discriminating protein patterns in serum samples between gastric cancer patients (early and advanced stages) and healthy controls. We used magnetic bead-based separation followed by matrix-assisted laser desorption ionization (MALDI) time-of-flight (TOF) mass spectrometry (MS) to identify patients with gastric cancer. In total, serum samples from 62 gastric cancer patients (32 in the training set and 30 in the test set; 19 of which had early-stage tumors and 43 of which had advanced-stage tumors) and 64 healthy controls (32 in the training set and 32 in the test set) were analyzed. The mass spectra, analyzed using ClinProTools software, distinguished between cancer patients and healthy individuals based on three different algorithm models. In the training set, patients with gastric cancer could be identified with a mean sensitivity of 94.7% and a mean specificity of 99%. Similar results were obtained with the test set, showing 79.3% sensitivity and 86.5% specificity. Our study demonstrates the high sensitivity and specificity of screening serum protein patterns using MALDI-TOF MS for the identification of patients with gastric cancer.
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Paulo JA, Lee LS, Wu B, Repas K, Banks PA, Conwell DL, Steen H. Proteomic analysis of endoscopically (endoscopic pancreatic function test) collected gastroduodenal fluid using in-gel tryptic digestion followed by LC-MS/MS. Proteomics Clin Appl 2011; 4:715-25. [PMID: 21137089 DOI: 10.1002/prca.201000018] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
PURPOSE Proteomic analysis of gastroduodenal fluid offers an alternative strategy to study diseases, such as peptic ulcer disease and gastric cancer. We use in-gel tryptic digestion followed by LC-MS/MS (GeLC-MS/MS) to profile the proteome of gastroduodenal fluid collected during the endoscopic pancreatic function test (ePFT). EXPERIMENTAL DESIGN Gastroduodenal fluid specimens collected during ePFT from six patients with upper abdominal pain were subjected to proteomic analysis. We extracted proteins using three chemical precipitation reagents (acetone, ethanol, and trichloroacetic acid) and analyzed each sample by SDS-PAGE and GeLC-MS/MS for protein identification. Cellular origin and molecular function of the identified proteins were determined via gene ontology analysis. RESULTS All three precipitation techniques successfully extracted protein from gastroduodenal fluid, with acetone resulting in excellent resolution and minimal protein degradation compared with the other methods. A total of 134 unique proteins were found in our GeLC-MS/MS analysis of ePFT-collected gastroduodenal fluid samples. Sixty-seven proteins were identified in at least two of the three samples. Gene ontology analysis classified these proteins mainly as being peptidases and localized extracellularly. CONCLUSIONS AND CLINICAL RELEVANCE ePFT, followed by acetone precipitation, and coupled with LC-MS/MS, can be used to safely collect gastroduodenal fluid from the upper gastrointestinal tract for MS-based proteomic analysis.
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Affiliation(s)
- Joao A Paulo
- Department of Pathology, Children's Hospital Boston, Boston, MA, USA
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From Our Sister Journal: Proteomics 6/2009. Proteomics 2009. [DOI: 10.1002/pmic.200990018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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