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Zhang X, Qiu X, Zhao W, Song L, Zhang X, Yang L, Tao M. Over-Expression of ARID3B Suppresses Tumor Progression and Predicts Better Prognosis in Patients With Gastric Cancer. Cancer Control 2023; 30:10732748231169403. [PMID: 37071790 PMCID: PMC10126794 DOI: 10.1177/10732748231169403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2023] Open
Abstract
BACKGROUND ARID3B (AT-rich interaction domain 3B) has been demonstrated to be associated with the progression and patient prognosis of several human tumors. We conducted the present study to investigate the biological behavior and clinical relevance of ARID3B in gastric cancer (GC). METHODS Detection of the expression level in GC tissues and cell lines were performed by Western blot and immunohistochemistry. We also retrospectively analyzed the correlation of ARID3B with clinicopathological characteristics and patient prognosis in gastric cancer. The biological functions of ARID3B in GC cells were further explored by transwell migration assays, wound healing assays and cell proliferation assay. RESULTS The present study suggested that the expression of ARID3B was significantly lower in GC tissues than in adjacent normal tissues. IHC staining in tissues of 406 GC patients from training and validation sets verified that ARID3B over-expression correlated with clinicopathological features, such as degree of differentiation and clinical stage. Meanwhile, ARID3B was proved to be an independent prognostic factor for GC prognosis. Furthermore, over-expression of ARID3B suppressed proliferation in GC cells according CCK8 assay. We found that over-expression of ARID3B inhibited GC cell migration by transwell assay and wound healing assay. Furthermore, EMT markers were detected in ARID3B over-expression GC cells, which showed that ARID3B may inhibit metastasis of GC cells. CONCLUSION Our results firstly revealed that the expression level of ARID3B was closely correlated with clinicopathological features and may serve as an independent prognostic factor for GC patients. More importantly, ARID3B could suppress GC progression, including cell proliferation, migration and metastasis.
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Affiliation(s)
- Xunlei Zhang
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
- Department of Oncology, Affiliated Tumor Hospital of Nantong University, Nantong, Jiangsu, China
| | - Xinyue Qiu
- Department of Oncology, Affiliated Tumor Hospital of Nantong University, Nantong, Jiangsu, China
| | - Wenjing Zhao
- Cancer Research Center, Affiliated Tumor Hospital of Nantong University, Nantong, Jiangsu, China
| | - Li Song
- Department of Oncology, Affiliated Tumor Hospital of Nantong University, Nantong, Jiangsu, China
| | - Xingsong Zhang
- Department of Pathology, Affiliated Tumor Hospital of Nantong University, Nantong Jiangsu, China
| | - Lei Yang
- Department of Oncology, Affiliated Tumor Hospital of Nantong University, Nantong, Jiangsu, China
| | - Min Tao
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
- Department of Oncology, Dushu Lake Hospital Affiliated to Soochow University, Suzhou, Jiangsu, China
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Swargiary P, Boruah N, Singh CS, Chatterjee A. Genome-wide analysis of DNaseI hypersensitivity unveils open chromatin associated with histone H3 modifications after areca nut with lime exposure. Mutagenesis 2022; 37:182-190. [DOI: 10.1093/mutage/geac015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Accepted: 09/01/2022] [Indexed: 11/13/2022] Open
Abstract
Abstract
Research over the years revealed that precocious anaphase, securin overexpression, and genome instability in both target and nontarget cells are significantly associated with the increased risk of areca nut (AN) and lime-induced oral, esophageal, and gastric cancers. Further, hyperphosphorylation of Rb and histone H3 epigenetic modifications both globally and in the promoter region of the securin gene were demonstrated after AN + lime exposure. This study aims whether the extract of raw AN + lime relaxes chromatin structure which further facilitates the histone H3 epigenetic modifications during the initial phase of carcinogenesis. Three groups of mice (10 in each group) were used. The treated group consumed 1 mg/day/mice of AN extract with lime ad libitum in the drinking water for 60 days. The dose was increased by 1 mg every 60 days. Isolated nuclei were digested with DNaseI and 2 kb and below DNA was eluted from the agarose gel, purified and PCR amplified by using securin and GAPDH primers. Securin and E2F1 expression, pRb phosphorylation, and histone epigenetic modifications were analyzed by immunohistochemistry. The number of DNA fragments within 2 kb in size after DNaseI treatment was higher significantly in AN + lime exposed tissue samples than in the untreated one. The PCR result showed that the number of fragments bearing securin gene promoter and GAPDH gene was significantly higher in AN + lime exposed DNaseI-treated samples. Immunohistochemistry data revealed increased Rb hyperphosphorylation, upregulation of E2F1, and securin in the AN + lime-treated samples. Increased trimethylation of histone H3 lysine 4 and acetylation of H3 lysine 9 and 18 were observed globally in the treated samples. Therefore, the results of this study have led to the hypothesis that AN + lime exposure relaxes the chromatin, changes the epigenetic landscape, and deregulates the Rb–E2F1 circuit which might be involved in the upregulation of securin and some other proto-oncogenes that might play an important role in the initial phases of AN + lime mediated carcinogenesis.
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Affiliation(s)
- Pooja Swargiary
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University , Shillong, Meghalaya 793022 , India
| | - Nabamita Boruah
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University , Shillong, Meghalaya 793022 , India
| | - Chongtham Sovachandra Singh
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University , Shillong, Meghalaya 793022 , India
| | - Anupam Chatterjee
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University , Shillong, Meghalaya 793022 , India
- Department of Biotechnology, Royal School of Biosciences, The Assam Royal Global University , Guwahati, Assam 781035 , India
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Boruah N, Singh CS, Swargiary P, Dkhar H, Chatterjee A. Securin overexpression correlates with the activated Rb/E2F1 pathway and histone H3 epigenetic modifications in raw areca nut-induced carcinogenesis in mice. Cancer Cell Int 2022; 22:30. [PMID: 35033090 PMCID: PMC8761315 DOI: 10.1186/s12935-022-02442-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 01/01/2022] [Indexed: 12/22/2022] Open
Abstract
Background Raw areca nut (RAN) consumption induces oral, esophageal and gastric cancers, which are significantly associated with the overexpression of pituitary tumor transforming gene 1/securin and chromosomal instability (CIN). An association of Securin/PTTG1 upregulation and gastric cancer in human was also demonstrated earlier. Since the molecular mechanism underlying securin upregulation remains unclear, this study intended to investigate the association of securin upregulation with the Rb-E2F1 circuit and epigenetic histone (H3) modification patterns both globally and in the promoter region of the securin gene. Methods Six groups of mice were used, and in the treated group, each mouse consumed 1 mg of RAN extract with lime per day ad libitum in the drinking water for 60 days, after which the dose was increased by 1 mg every 60 days. Histopathological evaluation of stomach tissues was performed and securin expression was analysed by immunoblotting as well as by immunohistochemistry. ChIP-qPCR assays were performed to evaluate the recruitment of different histone modifications in the core promoter region of securin gene as well as its upstream and downstream regions. Results All mice developed gastric cancer with securin overexpression after 300 days of feeding. Immunohistochemistry data revealed hyperphosphorylation of Rb and upregulation of E2F1 in the RAN-treated samples. Increased trimethylation of H3 lysine 4 and acetylation of H3 lysine 9 and 18 both globally and in the promoter region of the securin gene were observed by increasing the levels of lysine-N-methyltransferase 2A, lysine-acetyltransferase, EP-300 and PCAF after RAN treatment. ChIP-qPCR data revealed that the quantity of DNA fragments retrieved from the immunoprecipitated samples was maximum in the -83 to -192 region than further upstream and the downstream of the promoter for H3K4Me3, H3K9ac, H3K18ac and H3K9me3. Conclusions RAN-mediated pRb-inactivation induced securin upregulation, a putative E2F1 target, by inducing misregulation in chromatin remodeling in its promoter region, which led to transcriptional activation and subsequent development of chromosomal instability. Therefore, present results have led to the hypothesis that RAN-induced changes in the epigenetic landscape, securin overexpression and subsequent elevation of chromosomal instability is probably byproducts of inactivation of the pRb pathway. Supplementary Information The online version contains supplementary material available at 10.1186/s12935-022-02442-z.
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Affiliation(s)
- Nabamita Boruah
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya, 793022, India
| | - Chongtham Sovachandra Singh
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya, 793022, India
| | - Pooja Swargiary
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya, 793022, India
| | - Hughbert Dkhar
- Histopathology Division, Nazareth Hospital, Laitumkhrah, Shillong, 793003, India
| | - Anupam Chatterjee
- Molecular Genetics Laboratory, Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong, Meghalaya, 793022, India.
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Shin CM, Park K, Kim N, Won S, Ohn JH, Lee S, Park JH, Kang SJ, Kim JS, Lee DH. rs2671655 single nucleotide polymorphism modulates the risk for gastric cancer in Helicobacter pylori-infected individuals: a genome-wide association study in the Korean population. Gastric Cancer 2022; 25:573-585. [PMID: 35325318 PMCID: PMC8943788 DOI: 10.1007/s10120-022-01285-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Accepted: 02/04/2022] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To identify genetic variations which is associated with gastric cancer (GC) risk according to Helicobacter pylori infection. METHODS This study incorporated 527 GC patients and 441 controls from a cohort at Seoul National University Bundang Hospital. The associations between GC risk and single nucleotide polymorphisms were calculated, stratified by H. pylori status, adjusting for age, sex, and smoking. mRNA expression from non-cancerous gastric mucosae was evaluated using reverse transcription quantitative polymerase chain reaction. RESULTS In the entire cohort, genome-wide association study showed no significant variants reached the genome-wide significance level. In the H. pylori-positive group, rs2671655 (chr17:47,468,020;hg19, GH17J049387 enhancer region) was identified at a genome-wide significance level, which was more pronounced in diffuse type GC. There was no significant variant in the H. pylori-negative group, indicating the effect modification of rs2671655 by H. pylori. Among the target genes of GH17J049387 enhancer (PHB1, ZNF652 and SPOP), PHB1 mRNA was expressed more in cases than in controls, who were not affected by H. pylori. By contrast, an increase in ZNF652 and SPOP in GC was observed only in the H. pylori-negative group (P < 0.05). Mediation analysis showed that PHB1 (P = 0.0238) and SPOP (P = 0.0328) mediated the effect of rs2671655 on GC risk. The polygenic risk score was associated with the number of rs2671655 risk alleles only in the H. pylori-positive group (P = 0.0112). CONCLUSION After H. pylori infection, rs2671655 may increase GC risk, especially in diffuse-type GC, by regulating the expression of several genes that consequently modify susceptibility to GC.
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Affiliation(s)
- Cheol Min Shin
- grid.412480.b0000 0004 0647 3378Department of Internal Medicine, Seoul National University Bundang Hospital,, 173-82, Gumi-ro, Bundang-gu, Seongnam, Gyeonggi-do 13620 South Korea
| | - Kyungtaek Park
- grid.31501.360000 0004 0470 5905Interdisciplinary Program of Bioinformatics, Seoul National University, Seoul, Korea
| | - Nayoung Kim
- grid.412480.b0000 0004 0647 3378Department of Internal Medicine, Seoul National University Bundang Hospital,, 173-82, Gumi-ro, Bundang-gu, Seongnam, Gyeonggi-do 13620 South Korea ,grid.31501.360000 0004 0470 5905Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Sungho Won
- grid.31501.360000 0004 0470 5905Interdisciplinary Program of Bioinformatics, Seoul National University, Seoul, Korea ,grid.31501.360000 0004 0470 5905Department of Public Health Sciences, Seoul National University, Seoul, South Korea
| | - Jung Hun Ohn
- grid.412480.b0000 0004 0647 3378Department of Internal Medicine, Seoul National University Bundang Hospital,, 173-82, Gumi-ro, Bundang-gu, Seongnam, Gyeonggi-do 13620 South Korea
| | - Sejoon Lee
- grid.412480.b0000 0004 0647 3378Department of Pathology, Seoul National University Bundang Hospital, Seongnam, South Korea
| | - Ji Hyun Park
- grid.31501.360000 0004 0470 5905Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, South Korea
| | - Seung Joo Kang
- grid.412484.f0000 0001 0302 820XDepartment of Internal Medicine and Healthcare Research Institute, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Korea
| | - Joo Sung Kim
- grid.31501.360000 0004 0470 5905Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, South Korea ,grid.412484.f0000 0001 0302 820XDepartment of Internal Medicine and Healthcare Research Institute, Healthcare System Gangnam Center, Seoul National University Hospital, Seoul, Korea
| | - Dong Ho Lee
- grid.412480.b0000 0004 0647 3378Department of Internal Medicine, Seoul National University Bundang Hospital,, 173-82, Gumi-ro, Bundang-gu, Seongnam, Gyeonggi-do 13620 South Korea ,grid.31501.360000 0004 0470 5905Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, South Korea
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Liu J, Feng W, Liu M, Rao H, Li X, Teng Y, Yang X, Xu J, Gao W, Li L. Stomach-specific c-Myc overexpression drives gastric adenoma in mice through AKT/mammalian target of rapamycin signaling. Bosn J Basic Med Sci 2021; 21:434-446. [PMID: 33259779 PMCID: PMC8292868 DOI: 10.17305/bjbms.2020.4978] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Accepted: 11/16/2020] [Indexed: 12/30/2022] Open
Abstract
Gastric cancer (GC) is one of the most common malignant cancers in the world. c-Myc, a well-known oncogene, is commonly amplified in many cancers, including gastric cancer. However, it is still not completely understood how c-Myc functions in GC. Here, we generated a stomach-specific c-Myc transgenic mouse model to investigate its role in GC. We found that overexpression of c-Myc in Atp4b+ gastric parietal cells could induce gastric adenoma in mice. Mechanistically, c-Myc promoted tumorigenesis via the AKT/mTOR pathway. Furthermore, AKT inhibitor (MK-2206) or mTOR inhibitor (Rapamycin) inhibited the proliferation of c-Myc overexpressing gastric cancer cell lines. Thus, our findings highlight that gastric tumorigenesis can be induced by c-Myc overexpression through activation of the AKT/mTOR pathway.
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Affiliation(s)
- Jing Liu
- State Key Laboratory of Oncogenes and Related Genes, Renji Med-X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China; School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, China
| | - Wenxin Feng
- State Key Laboratory of Oncogenes and Related Genes, Renji Med-X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China; School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, China
| | - Min Liu
- State Key Laboratory of Oncogenes and Related Genes, Renji Med-X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China; School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, China
| | - Hanyu Rao
- State Key Laboratory of Oncogenes and Related Genes, Renji Med-X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China; School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaoxue Li
- State Key Laboratory of Oncogenes and Related Genes, Renji Med-X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China; School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, China
| | - Yan Teng
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing, China
| | - Xiao Yang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences, Beijing Institute of Lifeomics, Beijing, China
| | - Jin Xu
- School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, China
| | - Weiqiang Gao
- State Key Laboratory of Oncogenes and Related Genes, Renji Med-X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China; School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, China
| | - Li Li
- State Key Laboratory of Oncogenes and Related Genes, Renji Med-X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China; School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, China
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Statin Use Decreases the Risk of Metachronous Gastric Cancer in Patients without Helicobacter pylori Infection. Cancers (Basel) 2021; 13:cancers13051020. [PMID: 33804425 PMCID: PMC7957799 DOI: 10.3390/cancers13051020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 02/20/2021] [Accepted: 02/22/2021] [Indexed: 12/24/2022] Open
Abstract
Previous studies have shown that statins reduce the risk of gastric cancer; however, their role has not been adequately studied in patients without Helicobacterpylori infection. We aimed to investigate whether statins reduced the risk of metachronous gastric cancer (GC) in H. pylori-negative patients who underwent endoscopic resection for early gastric cancer (EGC). Retrospective data of 2153 patients recruited between January 2007 and December 2016, with no H. pylori infection at baseline, who underwent resection for EGC, were analyzed. Metachronous GC was defined as a newly developed GC at least 1 year after endoscopic resection. Patients who used statins for at least 28 days during the follow-up period were considered as statin users. During a median follow-up of 5 years (interquartile range, 3.5-6.2), metachronous GC developed in 165 (7.6%) patients. In the multivariate Cox regression analysis, statin use was an independent factor associated with GC recurrence (adjusted hazard ratio (HR), 0.46; 95% confidence interval (CI), 0.26-0.82). Moreover, the risk of GC reduced with increasing duration (<3 years: HR 0.40, 95% CI 0.14-1.13; ≥3 years: HR 0.21, 95% CI 0.05-0.90; p trend = 0.011) and the dose of statin (cumulative defined daily dose (cDDD) < 500: HR 0.45, 95% CI 0.16-1.28; cDDD ≥ 500: HR 0.19, 95% CI 0.04-0.80; p trend = 0.008) in the propensity score-matched cohort. Statin use was associated with a lower risk of GC recurrence in H. pylori-negative patients with resected EGC in a dose-response relationship.
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Abstract
PURPOSE One of the most important serious malignancies is gastric cancer (GC) with a high mortality globally. In this way, beside the environmental factors, genetic parameter has a remarkable effective fluctuation in GC. Correspondingly, telomeres are nucleoprotein structures measuring the length of telomeres and they have special potential in diagnosis of various types of cancers. Defect protection of the telomeric length initiates the instability of the genome during cancer, including gastric cancer. The most common way of maintaining telomere length is the function of the telomerase enzyme that replicates the TTAGGG to the end of the 3' chromosome. METHODS In this review, we want to discuss the alterations of hTERT repression on the modification of TERRA gene expression in conjunction with the importance of telomere and telomerase in GC. RESULTS The telomerase enzyme contains two essential components called telomerase reverse transcriptase (hTERT) and RNA telomerase (hTR, hTERC). Deregulation of hTERT plays a key role in the multistage process of tumorigenicity and anticancer drug resistance. The direct relationship between telomerase activity and hTERT has led to hTERT to be considered a key target for cancer treatment. Recent results show that telomeres are transcribed into telomeric repeat-containing RNA (TERRA) in mammalian cells and are long noncoding RNAs (lncRNAs) identified in different tissues. In addition, most chemotherapy methods have a lot of side effects on normal cells. CONCLUSION Telomere and telomerase are useful therapeutic goal. According to the main roles of hTERT in tumorigenesis, growth, migration, and cancer invasion, hTERT and regulatory mechanisms that control the expression of hTERT are attractive therapeutic targets for cancer treatment.
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Downregulated genes by silencing MYC pathway identified with RNA-SEQ analysis as potential prognostic biomarkers in gastric adenocarcinoma. Aging (Albany NY) 2020; 12:24651-24670. [PMID: 33351778 PMCID: PMC7803532 DOI: 10.18632/aging.202260] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Accepted: 10/31/2020] [Indexed: 12/24/2022]
Abstract
MYC overexpression is a common phenomenon in gastric carcinogenesis. In this study, we identified genes differentially expressed with a downregulated profile in gastric cancer (GC) cell lines with silenced MYC. The TTLL12, CDKN3, CDC16, PTPRA, MZT2B, UBE2T genes were validated using qRT-PCR, western blot and immunohistochemistry in tissues of 213 patients with diffuse and intestinal GC. We identified high levels of TTLL12, MZT2B, CDC16, UBE2T, associated with early and advanced stages, lymph nodes, distant metastases and risk factors such as H. pylori. Our results show that in the diffuse GC the overexpression of CDC16 and UBE2T indicate markers of poor prognosis higher than TTLL12. That is, patients with overexpression of these two genes live less than patients with overexpression of TTLL12. In the intestinal GC, patients who overexpressed CDC16 had a significantly lower survival rate than patients who overexpressed MZT2B and UBE2T, indicating in our data a worse prognostic value of CDC16 compared to the other two genes. PTPRA and CDKN3 proved to be important for assessing tumor progression in the early and advanced stages. In summary, in this study, we identified diagnostic and prognostic biomarkers of GC under the control of MYC, related to the cell cycle and the neoplastic process.
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A decade in unravelling the etiology of gastric carcinogenesis in Kashmir, India – A high risk region. GENE REPORTS 2020. [DOI: 10.1016/j.genrep.2020.100832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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10
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Chung Nien Chin S, O’Connor L, Scurr M, Busada JT, Graham AN, Alipour Talesh G, Tran CP, Sarkar S, Minamoto T, Giraud AS, Cidlowski JA, Sutton P, Menheniott TR. Coordinate expression loss of GKN1 and GKN2 in gastric cancer via impairment of a glucocorticoid-responsive enhancer. Am J Physiol Gastrointest Liver Physiol 2020; 319:G175-G188. [PMID: 32538140 PMCID: PMC9373792 DOI: 10.1152/ajpgi.00019.2020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Gastrokines (GKNs) are anti-inflammatory proteins secreted by gastric epithelial (surface mucous and pit) cells, with their aberrant loss of expression causally linked to premalignant inflammation and gastric cancer (GC). Transcriptional mechanisms accounting for GKN expression loss have not been elucidated. Using human clinical cohorts, mouse transgenics, bioinformatics, and transfection/reporter assays, we report a novel mechanism of GKN gene transcriptional regulation and its impairment in GC. GKN1/GKN2 loss is highly coordinated, with both genes showing parallel downregulation during human and mouse GC development, suggesting joint transcriptional control. In BAC transgenic studies, we defined a 152-kb genomic region surrounding the human GKN1/GKN2 genes sufficient to direct their tissue- and lineage-restricted expression. A screen of the 152-kb region for candidate regulatory elements identified a DNase I hypersensitive site (CR2) located 4 kb upstream of the GKN1 gene. CR2 showed overlapping enrichment of enhancer-related histone marks (H3K27Ac), a consensus binding site (GRE) for the glucocorticoid receptor (GR), strong GR occupancy in ChIP-seq data sets and, critically, exhibited dexamethasone-sensitive enhancer activity in reporter assays. Strikingly, GR showed progressive expression loss, paralleling that of GKN1/2, in human and mouse GC, suggesting desensitized glucocorticoid signaling as a mechanism underlying GKN loss. Finally, mouse adrenalectomy studies revealed a critical role for endogenous glucocorticoids in sustaining correct expression (and anti-inflammatory restraint) of GKNs in vivo. Together, these data link the coordinate expression of GKNs to a glucocorticoid-responsive and likely shared transcriptional enhancer mechanism, with its compromised activation contributing to dual GKN loss during GC progression.NEW & NOTEWORTHY Gastrokine 2 (GKN2) is an anti-inflammatory protein produced by the gastric epithelium. GKN2 expression is progressively lost during gastric cancer (GC), which is believed to play a casual role in GC development. Here, we use bacterial artificial chromosome transgenic studies to identify a glucocorticoid-responsive enhancer element that likely governs expression of GKN1/GKN2, which, via parallel expression loss of the anti-inflammatory glucocorticoid receptor, reveals a novel mechanism to explain the loss of GKN2 during GC pathogenesis.
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Affiliation(s)
| | - Louise O’Connor
- 1Murdoch Children’s Research Institute, Melbourne, Victoria, Australia
| | - Michelle Scurr
- 1Murdoch Children’s Research Institute, Melbourne, Victoria, Australia
| | - Jonathan T. Busada
- 2Molecular Endocrinology Group, Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina
| | - Alison N. Graham
- 1Murdoch Children’s Research Institute, Melbourne, Victoria, Australia
| | - Ghazal Alipour Talesh
- 1Murdoch Children’s Research Institute, Melbourne, Victoria, Australia,3Division of Translational and Clinical Oncology, Cancer Research Institute, Kanazawa University, Kanazawa, Japan
| | - Chau P. Tran
- 1Murdoch Children’s Research Institute, Melbourne, Victoria, Australia
| | - Sohinee Sarkar
- 1Murdoch Children’s Research Institute, Melbourne, Victoria, Australia
| | - Toshinari Minamoto
- 3Division of Translational and Clinical Oncology, Cancer Research Institute, Kanazawa University, Kanazawa, Japan
| | - Andrew S. Giraud
- 1Murdoch Children’s Research Institute, Melbourne, Victoria, Australia,4Department of Pediatrics, University of Melbourne, Melbourne, Victoria, Australia
| | - John A. Cidlowski
- 2Molecular Endocrinology Group, Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina
| | - Philip Sutton
- 1Murdoch Children’s Research Institute, Melbourne, Victoria, Australia,4Department of Pediatrics, University of Melbourne, Melbourne, Victoria, Australia
| | - Trevelyan R. Menheniott
- 1Murdoch Children’s Research Institute, Melbourne, Victoria, Australia,4Department of Pediatrics, University of Melbourne, Melbourne, Victoria, Australia
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Kwong MLM, Denham L, Selleck MJ, Kim C, Kunihira K, Kubba R, Rojas R, Garberoglio C, Senthil M. Response to Neoadjuvant Treatment is Influenced by Grade in Gastric Cancer. Am Surg 2020. [DOI: 10.1177/000313481908501241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Neoadjuvant therapy is commonly used in the management of gastric cancer. Primary tumor response to treatment correlates with prognosis. Published studies have compared efficacy of neoadjuvant therapy based on stage but not grade. The objective of this study was to determine the change in staging of gastric cancer after neoadjuvant therapy and resection based on grade. A retrospective analysis of gastric cancer patients treated at our institution between 2005 and 2017 was performed. Patient demographics, tumor characteristics, clinical and pathological stage, and microscopic treatment response were analyzed based on grade. Of the 269 patients identified during this period, 82 patients underwent definitive surgical resection, of which 38 patients received neoadjuvant therapy (low grade (grades 1 and 2), n = 17; high grade (grade 3), n = 18; and unknown grade, n = 3). Pathologic downstaging was observed in 52.9 per cent (9/17) of low-grade tumors compared with 22.2 per cent (4/18) of high-grade tumors. Majority of high-grade tumors (77.8%, 14/18) had either upstaging or unchanged stage. High-grade gastric cancers often lack response to neoadjuvant therapy. Novel targeted therapies based on biologic behavior should be evaluated and incorporated into neoadjuvant treatment. Neoadjuvant studies should stratify patients based on grade and report response by grade.
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Affiliation(s)
| | - Laura Denham
- Loma Linda University Health, Loma Linda, California and
| | | | - Candice Kim
- Loma Linda University School of Medicine, Loma Linda, California
| | - Karissa Kunihira
- Loma Linda University School of Medicine, Loma Linda, California
| | - Rohan Kubba
- Loma Linda University School of Medicine, Loma Linda, California
| | - Rachel Rojas
- Loma Linda University School of Medicine, Loma Linda, California
| | - Carlos Garberoglio
- Loma Linda University Health, Loma Linda, California and
- Loma Linda University School of Medicine, Loma Linda, California
| | - Maheswari Senthil
- Loma Linda University Health, Loma Linda, California and
- Loma Linda University School of Medicine, Loma Linda, California
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12
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Yuan QH, Liu G, Hu Q, Wang J, Leng K. Identification of lapatinib sensitivity-related genes by integrative functional module analysis. Transl Cancer Res 2020; 9:1351-1360. [PMID: 35117483 PMCID: PMC8799157 DOI: 10.21037/tcr.2020.01.30] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 12/24/2019] [Indexed: 12/17/2022]
Abstract
Background Globally, gastric carcinoma (GC) is one of the most commonly encountered malignancies and is the second highest contributor to cancer mortality. Lapatinib is a potent, orally-bioavailable small-molecule inhibitor of both epidermal growth factor receptor and human epidermal growth factor receptor-2 tyrosine kinases, and is administered to treat GC. However, a large proportion of patients either develop resistance to or do not respond to lapatinib, often because the treatment activates alternative signaling pathways. It is, therefore, vital to identify the key pathways which mediate resistance to lapatinib treatment. Methods The lapatinib sensitivity-related genes were extracted from the CellMiner database (version 2.2) using “NCI-60 Analysis Tools”. The differentially expressed genes (DEGs) in gastric cancer were derived from The Cancer Genome Atlas (TCGA) database, the protein-protein interaction (PPI) network was derived from the Human Protein Reference Database (HPRD), and the Database for Annotation, Visualization and Integrated Discovery (DAVID) facilitated the functional analysis. The cell function was tested by CCK-8 cell viability assay, colony formation assay, acridine orange/ethidium bromide (AO/EB) staining, and Transwell assay. Results The functional linkage networks of lapatinib sensitivity were constructed. Two modules were identified, and pathway analysis indicated that these modules were involved in several pathways, including the neuroactive ligand-receptor interaction network and the Rap1 signaling pathway. Finally, the breast cancer anti-estrogen resistance 1 (BCAR1) gene was selected for further study with lapatinib-resistant SUN216 cells (SUN216/LR). We found the expression of BCAR1 was upregulated in SUN216/LR cells compared to SUN216 cells. The IC50 of lapatinib in SUN216/LR cells was reduced upon BCAR1 knockdown, as measured by a CCK-8 assay. A clonogenic assay showed fewer SUN216/LR colonies with BCAR1 knockdown and lapatinib treatment. Conclusions In brief, we efficiently identified those crucial modules highly related to lapatinib sensitivity in GC by using a topological network method. BCAR1 was identified as a potentially critical gene that plays a role in lapatinib sensitivity, and experiments confirmed that BCAR1 might contribute to lapatinib resistance in GC. These results provide further insight into the molecular basis of lapatinib sensitivity and may offer novel strategies for the future treatment of GC.
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Affiliation(s)
- Qi-Hua Yuan
- Department of Gastrointestinal Surgery, Yidu Central Hospital Affiliated to Weifang Medical University, Qingzhou 262500, China
| | - Guodong Liu
- Department of Gastrointestinal Surgery, Yidu Central Hospital Affiliated to Weifang Medical University, Qingzhou 262500, China
| | - Qiuhui Hu
- Department of Hepatobiliary Surgery, Heilongjiang Province Second Cancer Hospital, Harbin 150000, China
| | - Jingwen Wang
- Department of Gastrointestinal Surgery, Yidu Central Hospital Affiliated to Weifang Medical University, Qingzhou 262500, China
| | - Kaiming Leng
- Department of Hepatobiliary Surgery, Qingdao Municipal Hospital, Qingdao 266071, China
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13
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Zhang ZL, Li ZR, Li JS, Wang SR. Calcium-sensing receptor antagonist NPS-2143 suppresses proliferation and invasion of gastric cancer cells. Cancer Gene Ther 2019; 27:548-557. [PMID: 31391530 DOI: 10.1038/s41417-019-0128-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 07/15/2019] [Accepted: 07/20/2019] [Indexed: 12/13/2022]
Abstract
NPS-2143 is a calcium-sensing receptor (CaSR) antagonist that has been demonstrated to possess anticancer activity. To date, the effects of NPS-2143 on gastric cancer (GC) cell growth, motility, and apoptosis have not been investigated. In the present study, we firstly investigated the expression of CaSR in GC tissues using immunohistochemistry and western blotting. Then Cell Counting Kit-8 and colony formation assays were conducted to explore the effect of the NPS-2143 on the proliferation of GC cell line AGS. Transwell invasion and migration assays were performed to test the effect of NPS-2143 on AGS cell motility. We determined the percentage of apoptotic cells by flow cytometry and explored the changes of apoptosis-related protein by western blotting. Furthermore, we constructed a CaSR knockdown AGS cell line to determine whether NPS-2143 acted via inhibition of CaSR. We found that the protein expression level of CaSR was higher in GC tissues compared with the paired adjacent normal tissues. In addition, NPS-2143 treatment caused an inhibitory effect on the proliferation, invasion, and migration of AGS cells and a promoting effect on AGS apoptosis. The expression of Bcl-2 was decreased while the levels of Bax and active caspase 3 were enhanced in AGS cells after NPS-2143 treatment. Mechanistically, NPS-2143 lead to a significant decrease in the expression of phosphorylated (p)-AKT, phosphorylated mechanistic target of rapamycin (p-mTOR), p70, and cyclin D1. Knockdown of CaSR also suppressed cell proliferation, invasion, and migration and promoted cell apoptosis. No significant difference was observed between CaSR-silenced AGS cells with and without NPS-2143 treatment. These results confirmed that NPS-2143 has an inhibitory influence on AGS cell growth via inhibiting CaSR, which then suppresses the PI3K/Akt signaling pathway.
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Affiliation(s)
- Zong-Lin Zhang
- Department of Pharmacy, Linyi People's Hospital, Linyi, 276003, Shandong, PR China
| | - Zheng-Rong Li
- Department of Pharmacy, Linyi People's Hospital, Linyi, 276003, Shandong, PR China
| | - Jun-Sheng Li
- Department of Pharmacy, Linyi People's Hospital, Linyi, 276003, Shandong, PR China
| | - Su-Rong Wang
- Department of Gynecology, Linyi People's Hospital, Linyi, 276003, Shandong, PR China.
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14
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Alarcón-Millán J, Martínez-Carrillo DN, Peralta-Zaragoza O, Fernández-Tilapa G. Regulation of GKN1 expression in gastric carcinogenesis: A problem to resolve (Review). Int J Oncol 2019; 55:555-569. [PMID: 31322194 DOI: 10.3892/ijo.2019.4843] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 07/04/2019] [Indexed: 11/05/2022] Open
Abstract
Gastrokine 1 (GKN1) is a protein expressed on the surface mucosa cells of the gastric antrum and fundus, which contributes to maintaining gastric homeostasis, inhibits inflammation and is a tumor suppressor. The expression of GKN1 decreases in mucosa that are either inflamed or infected by Helicobacter pylori, and is absent in gastric cancer. The measurement of circulating GKN1 concentration, the protein itself, or the mRNA in gastric tissue may be of use for the early diagnosis of cancer. The mechanisms that modulate the deregulation or silencing of GKN1 expression have not been completely described. The modification of histones, methylation of the GKN1 promoter, or proteasomal degradation of the protein have been detected in some patients; however, these mechanisms do not completely explain the absence of GKN1 or the reduction in GKN1 levels. Only NKX6.3 transcription factor has been shown to be a positive modulator of GKN1 transcription, although others also have an affinity with sequences in the promoter of this gene. While microRNAs (miRNAs) are able to directly or indirectly regulate the expression of genes at the post‑transcriptional level, the involvement of miRNAs in the regulation of GKN1 has not been reported. The present review analyzes the information reported on the determination of GKN1 expression and the regulation of its expression at the transcriptional, post‑transcriptional and post‑translational levels; it proposes an integrated model that incorporates the regulation of GKN1 expression via transcription factors and miRNAs in H. pylori infection.
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Affiliation(s)
- Judit Alarcón-Millán
- Clinical Research Laboratory, Faculty of Biological Chemical Sciences, Guerrero Autonomous University, Chilpancingo, Guerrero 39070, México
| | - Dinorah Nashely Martínez-Carrillo
- Clinical Research Laboratory, Faculty of Biological Chemical Sciences, Guerrero Autonomous University, Chilpancingo, Guerrero 39070, México
| | - Oscar Peralta-Zaragoza
- Direction of Chronic Infections and Cancer, Research Center in Infection Diseases, National Institute of Public Health, Cuernavaca, Morelos 62100, México
| | - Gloria Fernández-Tilapa
- Clinical Research Laboratory, Faculty of Biological Chemical Sciences, Guerrero Autonomous University, Chilpancingo, Guerrero 39070, México
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15
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Balusamy SR, Ramani S, Natarajan S, Kim YJ, Perumalsamy H. Integrated transcriptome and in vitro analysis revealed anti-proliferative effect of citral in human stomach cancer through apoptosis. Sci Rep 2019; 9:4883. [PMID: 30890753 PMCID: PMC6425008 DOI: 10.1038/s41598-019-41406-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 03/05/2019] [Indexed: 12/13/2022] Open
Abstract
Cancer is the second leading cause of death globally, particularly stomach cancer is third most common causes of cancer death worldwide. Citral possesses anti-tumor activity in various cancer cell lines, However its effect toward stomach cancer and its mechanism of action is have yet to be elucidated. The goal of the present study is to elucidate the role of citral in stomach cancer using transcriptome and in vitro approaches. We performed transcriptome analysis using RNA-seq and explored its capability to persuade apoptosis in AGS human stomach cancer cell lines in vitro. Furthermore, the enrichment and KEGG pathway results suggested that there are several genes involved to induce apoptosis pathway. Furthermore, our study also demonstrated that citral arrested colony formation and migration of cancer cells significantly than that of untreated cells. RNA-seq revealed a total of 125 million trimmed reads obtained from both control and citral treated groups respectively. A total number of 612 differentially expressed genes (DEGs) were identified which includes 216 genes up-regulated and 396 genes down-regulated genes after treatment. The enrichment analysis identified DEGs genes from transcriptome libraries including cell death, cell cycle, apoptosis and cell growth. The present study showed the significant inhibition effect upon citral by regulating various genes involved in signaling pathways, inhibits metastasis, colony formation and induced apoptosis both in silico and in vitro.
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Affiliation(s)
- Sri Renukadevi Balusamy
- Department of Food Science and Biotechnology Sejong University, Gwangjin-gu, Seoul, Republic of Korea.
| | - Sivasubramanian Ramani
- Department of Food Science and Biotechnology Sejong University, Gwangjin-gu, Seoul, Republic of Korea
| | | | - Yeon Ju Kim
- Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Yongin, 446- 701, Republic of Korea.
| | - Haribalan Perumalsamy
- Graduate School of Biotechnology, College of Life Science, Kyung Hee University, Yongin, 446- 701, Republic of Korea.
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16
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Rahman MM, Sarker MAK, Hossain MM, Alam MS, Islam MM, Shirin L, Sultana R, Sultana GNN. Association of p53 Gene Mutation With Helicobacter pylori Infection in Gastric Cancer Patients and Its Correlation With Clinicopathological and Environmental Factors. World J Oncol 2019; 10:46-54. [PMID: 30834051 PMCID: PMC6396778 DOI: 10.14740/wjon1087] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Accepted: 02/11/2019] [Indexed: 12/19/2022] Open
Abstract
Background Gastric cancer is also a leading cancer in Bangladesh like that of the global incidences. It is speculated that environmental, bacterial infection and molecular factors might have been carrying the key role of rising trend of the disease. This study was aimed to investigate the association of mutated p53 gene with of Helicobacter pylori (H. pylori) infection, clinicopathological and some environmental factors of the gastric cancer patients. Methods This cross-sectional study was carried out from January 2015 to December 2016 in a specialized cancer hospital of Bangladesh. Patients were selected randomly who were admitted for surgical intervention after diagnosis as adenocarcinoma of the stomach and physically fit for surgery. After admission proper evaluation of the patients was done. Tissue sample from the gastrectomy specimen along with the blood sample was sent to the related laboratories. After DNA extraction for p53, exons 5 and 6, they were adjusted for proper primer designing. Appropriate sequencing analysis of the result was done. Status of p53 was investigated to see their association with the result of the H. pylori, age and sex, tumor status, smoking and extra salt intake of the patients. Result of the study was calculated and analyzed by Chi-square and binomial logistic regression to find the association amongst them. Results Among the 71 patients, mean age was 52.96 years old, male: female ratio were 48:23, age group above 41 years were 53 (74.6%), proliferative and ulceroproliferative group of the tumor dominated (87.3%). There were 52 cases with (73.2%) p53 mutation. Among the 51 H. pylori positive cases, 41 (80%) had p53 mutation (P = 0.033). Tumor size and lymph node status were found to be associated with the gene mutation (P = 0.05). Age also had strong correlation with the mutation (P = 0.015). Gene mutation was found mostly among the younger (≤ 40 years) group of patients (94.4%). Patient with extra salt intake was also found related with the mutation (P = 0.03). Conclusions Environmental and genetic factors seem to be risk factors for gastric cancer in Bangladesh. Nationwide anti H. pylori drive and further molecular research could elicit the other risk factors which might help to reduce the gastric cancer incidences in the country after taking appropriate measures.
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Affiliation(s)
- M Mizanur Rahman
- Department of Surgical Oncology, National Institute of Cancer Research and Hospital, Mohakhali, Dhaka, Bangladesh
| | | | | | - Mohd Sahajadul Alam
- National Institute of Cancer Research and Hospital, Mohakhali, Dhaka, Bangladesh
| | - Md Monzurul Islam
- National Institute of Cancer Research and Hospital, Mohakhali, Dhaka, Bangladesh
| | - Laila Shirin
- National Institute of Cancer Research and Hospital, Mohakhali, Dhaka, Bangladesh
| | - Rokeya Sultana
- Centre for Advanced Research in Sciences (CARS), University of Dhaka, Dhaka, Bangladesh
| | - Gazi Nurun Nahar Sultana
- Genetic Engineering and Biotechnology Research Centre for Advanced Research in Sciences (CARS), University of Dhaka, Dhaka, Bangladesh
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17
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Li Y, Guo D, Sun R, Chen P, Qian Q, Fan H. Methylation Patterns of Lys9 and Lys27 on Histone H3 Correlate with Patient Outcome in Gastric Cancer. Dig Dis Sci 2019; 64:439-446. [PMID: 30350241 DOI: 10.1007/s10620-018-5341-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Accepted: 10/16/2018] [Indexed: 02/06/2023]
Abstract
BACKGROUND Histone methylation has been considered as one of the epigenetic mechanisms of carcinogenesis and progression. Researches on the correlation between histone lysine methylation and gastric cancer (GC) will help in finding novel epigenetic biomarkers for monitoring cancers. AIMS The study detected the expression patterns of histone 3 lysine 9 dimethylation (H3K9me2), histone 3 lysine 9 trimethylation (H3K9me3), and histone 3 lysine 27 trimethylation (H3K27me3) in GC tissues and evaluated their clinical merit for GC patients. METHODS One hundred thirty-three paraffin-embedded GC samples were examined by immunohistochemistry for the histone markers: H3K9me2, H3K9me3, and H3K27me3. The relationship and clinicopathological significance of the three lysine methylations on histone H3 with GC were assessed by Paired t test, Chi-square test, Kaplan-Meier analysis with log-rank test, and Cox proportional hazard analyses. RESULTS Strong positive immunostaining of H3K9me2, H3K9me3, and H3K27me3 was observed in cancerous tissues than in their counterpart non-cancer tissues. Higher expression patterns of H3K9me2, H3K9me3, and H3K27me3 significantly related to differentiation degree, lymph nodes metastases, and pathological TNM staging in GC. The GC patients with low scoring of the three markers implied long survival period and best prognosis. In contrast, the patients' survival time was significantly shorter if their cancerous tissues presented high expression of the three markers. CONCLUSIONS H3K9me2, H3K9me3, and H3K27me3 expression patterns closely relate to clinicopathological features and may be the independent risk factors for the survival of GC patients. The combined pattern of the three markers rather than an individual marker is considered to more accurately evaluate the outcome of GC patients.
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Affiliation(s)
- Yiping Li
- Department of Medical Genetics and Developmental Biology, Medical School, The Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, Southeast University, Nanjing, 210009, China.,Department of Pathology, Medical School, Southeast University, Nanjing, 210009, China
| | - Didi Guo
- Institute of Life Science, The Key Laboratory of Developmental Genes and Human Diseases, Southeast University, Nanjing, 210018, China
| | - Rui Sun
- Department of Medical Genetics and Developmental Biology, Medical School, The Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, Southeast University, Nanjing, 210009, China
| | - Ping Chen
- Department of Oncology, Yancheng First People's Hospital, Yancheng, 224005, China
| | - Qi Qian
- Department of Oncology, Yancheng First People's Hospital, Yancheng, 224005, China
| | - Hong Fan
- Department of Medical Genetics and Developmental Biology, Medical School, The Key Laboratory of Developmental Genes and Human Diseases, Ministry of Education, Southeast University, Nanjing, 210009, China.
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18
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Gastric Cancer Cell Lines Have Different MYC-Regulated Expression Patterns but Share a Common Core of Altered Genes. Can J Gastroenterol Hepatol 2018; 2018:5804376. [PMID: 30410872 PMCID: PMC6206580 DOI: 10.1155/2018/5804376] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 09/12/2018] [Accepted: 09/23/2018] [Indexed: 12/15/2022] Open
Abstract
MYC is an oncogene responsible for excessive cell growth in cancer, enabling transcriptional activation of genes involved in cell cycle regulation, metabolism, and apoptosis, and is usually overexpressed in gastric cancer (GC). By using siRNA and Next-Generation Sequencing (NGS), we identified MYC-regulated differentially expressed Genes (DEGs) in three Brazilian gastric cancer cell lines representing the histological subtypes of GC (diffuse, intestinal, and metastasis). The DEGs were picked using Sailfish software, followed by Gene Set Enrichment Analysis (GSEA) and Kyoto Encyclopedia of Gene and Genome (KEGG) pathway analysis using KEGG. We found 11 significantly enriched gene sets by using enrichment score (ES), False Discovery Rate (FDR), and nominal P-values. We identified a total of 5.471 DEGs with correlation over (80%). In diffuse-type and in metastatic GC cell lines, MYC-silencing caused DEGs downregulation, while the intestinal-type GC cells presented overall DEGs upregulation after MYC siRNA depletion. We were able to detect 11 significant gene sets when comparing our samples to the hallmark collection of gene expression, enriched mostly for the following hallmarks: proliferation, pathway, signaling, metabolic, and DNA damage response. When we analyzed our DEGs considering KEGG metabolic pathways, we found 12 common branches covering a wide range of biological functions, and three of them were common to all three cell lines: ubiquitin-mediated proteolysis, ribosomes, and system and epithelial cell signaling in Helicobacter pylori infection. The GC cell lines used in this study share 14 MYC-regulated genes, but their gene expression profile is different for each histological subtype of GC. Our results present a computational analysis of MYC-related signatures in GC, and we present evidence that GC cell lines representing distinct histological subtypes of this disease have different MYC-regulated expression profiles but share a common core of altered genes. This is an important step towards the understanding of MYC's role in gastric carcinogenesis and an indication of probable new drug targets in stomach cancer.
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Role of vascular endothelial growth factor receptor in the pro-proliferation activity of CD40-CD40L in AGS gastric cancer cells. ASIAN BIOMED 2018. [DOI: 10.2478/abm-2010-0104] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Background: CD40 is a type α-membrane protein of the tumor necrosis factor receptor super-family, and CD40- induced responses may mediate growth and angiogenesis in carcinoma cells. Objectives: Define the effect of CD40 ligation on AGS gastric cancer cell line and the role of vascular endothelial growth factor/vascular endothelial growth factor receptor (VEGF/VEGFR) signals in this process. Methods: We treated AGS cells with 1 μg/mL soluble CD40 ligand (sCD40L) with or without pre-incubation of either anti-VEGF mAb (MAB293) or VEGFR tyrosine kinase inhibitor (SU5416). We determined the growth effects by cell counts or [3H]-thymidine incorporation assay and VEGF levels in cell-free supernatant using enzymelinked immunosorbent assays. Results: The engagement of CD40-induced AGS cells proliferation accompanied by a significant increase autocrine VEGF through PI3K activation (p <0.05), and exogenous VEGF alone had no effect on spontaneous cell growth. SU5416 with a concentration of 8 μM lead to a dramatic decrease in cell survival induced by sCD40L (p <0.05), whereas MAB293 did not have the similar effect (p >0.05). Conclusion: CD40-CD40L interaction promoted AGS cancer cell line proliferation through a VEGFR-dependent signal pathway in the presence of an internal autocrine loop.
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20
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Puneet, Kazmi HR, Kumari S, Tiwari S, Khanna A, Narayan G. Epigenetic Mechanisms and Events in Gastric Cancer-Emerging Novel Biomarkers. Pathol Oncol Res 2018; 24:757-770. [PMID: 29552712 DOI: 10.1007/s12253-018-0410-z] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 03/07/2018] [Indexed: 12/12/2022]
Abstract
Gastric cancer is one of the most common malignancy worldwide. The various genetic and epigenetic events have been found to be associated with its carcinogenesis. The epigenetic is a heritable and transient/reversible change in the gene expression that is not accompanied by modification in the DNA sequence. This event is characterized by the alteration in the promoter CpG island of the gene or histone modification. These events are associated with silencing of critical tumor suppressor gene and activation of oncogenes leading to carcinogenesis. The DNA methylation is a chemical change in the DNA sequence that most commonly occurs at cytosine moiety of CpG dinucleotide and histone, primarily on N- terminal tail that ultimately effect the interaction of DNA with chromatin modifying protein.Hypermethylation of tumor suppressor genes and global hypomethylation of oncogenes are widely studied epigenetic modifications. There are large number of publish reports regarding epigenetic events involving gastric cancer. These changes are potentially useful in identifying markers for early diagnosis and management of this lethal malignancy. Also, role of specific miRNAs and long non coding RNAs in regulation of gene expression is gaining interest and is a matter of further investigation. In this review, we aimed to summarize major epigenetic events (DNA methylation) in gastric cancer along with alteration in miRNAs and long non coding RNAs which plays an important role in pathology of this poorly understood malignancy.
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Affiliation(s)
- Puneet
- Department of Surgery, Institute of Medical Science, Banaras Hindu University, Varanasi, 221005, India.
| | - Hasan Raza Kazmi
- Cancer Genetics Laboratory, Department of Molecular and Human Genetics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Soni Kumari
- Cancer Genetics Laboratory, Department of Molecular and Human Genetics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Satendra Tiwari
- Department of Surgery, Institute of Medical Science, Banaras Hindu University, Varanasi, 221005, India
| | - A Khanna
- Department of Surgery, Institute of Medical Science, Banaras Hindu University, Varanasi, 221005, India
| | - Gopeshwar Narayan
- Cancer Genetics Laboratory, Department of Molecular and Human Genetics, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
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Zhou Y, Wang Y, Wen J, Zhao H, Dong X, Zhang Z, Wang S, Shen L. Aquaporin 3 promotes the stem-like properties of gastric cancer cells via Wnt/GSK-3β/β-catenin pathway. Oncotarget 2017; 7:16529-41. [PMID: 26918728 PMCID: PMC4941333 DOI: 10.18632/oncotarget.7664] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 02/11/2016] [Indexed: 12/13/2022] Open
Abstract
Cancer stem cells (CSCs) are believed to contribute to the tumor growth in gastric carcinoma (GC), a common lethal malignancy. This study investigated the effect of aquaporin 3 (AQP3) on stem-like properties of human GC cells. Elevated AQP3 expression was associated with CD44 expression in human GC specimens. Expression of AQP3 and that of CD44 positively correlated with Lauren classification, lymph node metastasis, and lymphovascular invasion. Altering the AQP3 expression had pronounced effects on the tumorigenic potential and self-renewal capacity of the gastric cancer cell lines SGC7901, MGC803, and AGS, both in vitro and in vivo. Overexpression of AQP3 induced CD44 expression and activation of the β-catenin signaling pathway, whereas silencing AQP3 expression using short hairpin RNA had the opposite effect. Furthermore, pharmacological inhibition of GSK-3β using LiCl impaired the effect of AQP3 knockdown in CSCs, whereas the inhibition of the Wnt/β-catenin pathway by XAV939 blocked the effect of AQP3 overexpression. These results demonstrate that AQP3 promotes stem-like properties of human GC cells by activating the Wnt/GSK-3β/β-catenin signaling pathway.
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Affiliation(s)
- Yangchun Zhou
- Division of Gastrointestinal Surgery, Department of General Surgery, First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China.,Department of General Surgery, Sir Run Run Shaw Hospital, Third Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yao Wang
- Division of Gastrointestinal Surgery, Department of General Surgery, First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Jianfei Wen
- Division of Gastrointestinal Surgery, Department of General Surgery, First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Haijian Zhao
- Division of Gastrointestinal Surgery, Department of General Surgery, First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China.,Division of Gastrointestinal Surgery, Department of General Surgery, Affiliated Huai'an Hospital, Xuzhou Medical College, Huai'an, Jiangsu, China
| | - Xuqiang Dong
- Division of Gastrointestinal Surgery, Department of General Surgery, First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Zhihong Zhang
- Department of Pathology, First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Shoulin Wang
- School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Lizong Shen
- Division of Gastrointestinal Surgery, Department of General Surgery, First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu, China
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22
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Triki M, Ben Ayed-Guerfali D, Saguem I, Charfi S, Ayedi L, Sellami-Boudawara T, Cavailles V, Mokdad-Gargouri R. RIP140 and LCoR expression in gastrointestinal cancers. Oncotarget 2017; 8:111161-111175. [PMID: 29340045 PMCID: PMC5762313 DOI: 10.18632/oncotarget.22686] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 11/05/2017] [Indexed: 12/11/2022] Open
Abstract
The transcription coregulators RIP140 and LCoR are part of a same complex which controls the activity of various transcription factors and cancer cell proliferation. In this study, we have investigated the expression of these two genes in human colorectal and gastric cancers by immunohistochemistry. In both types of tumors, the levels of RIP140 and LCoR appeared highly correlated. Their expression tended to decrease in colorectal cancer as compared to adjacent normal tissues but was found higher in gastric cancer as compared to normal stomach. RIP140 and LCoR expression correlated with TNM and tumor differentiation. Significant correlations were observed with expression levels of key proteins involved in tumor progression and invasion namely E-cadherin and Cyclooxygenase-2. Survival analysis showed that patients with LCoRlow/RIP140high colorectal tumors have a significant prolonged overall and disease-free survival. In gastric cancer, high LCoR expression was identified as an independent marker of poor prognosis suggesting a key role in this malignancy. Altogether, these results demonstrate that RIP140 and LCoR have a prognostic relevance in gastrointestinal cancers and could represent new potential biomarkers in these tumors.
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Affiliation(s)
- Mouna Triki
- IRCM (Institute of Cancer Research of Montpellier), INSERM U1194, Montpellier University, Montpellier, France.,Center of Biotechnology of Sfax, Laboratory of Eukaryotic Molecular Biotechnology, Sfax University, Sfax, Tunisia
| | - Dorra Ben Ayed-Guerfali
- Center of Biotechnology of Sfax, Laboratory of Eukaryotic Molecular Biotechnology, Sfax University, Sfax, Tunisia
| | - Ines Saguem
- Department of Anatomopathology, Habib Bourguiba Hospital, Sfax, Tunisia
| | - Slim Charfi
- Department of Anatomopathology, Habib Bourguiba Hospital, Sfax, Tunisia
| | - Lobna Ayedi
- Department of Anatomopathology, Habib Bourguiba Hospital, Sfax, Tunisia
| | | | - Vincent Cavailles
- IRCM (Institute of Cancer Research of Montpellier), INSERM U1194, Montpellier University, Montpellier, France
| | - Raja Mokdad-Gargouri
- Center of Biotechnology of Sfax, Laboratory of Eukaryotic Molecular Biotechnology, Sfax University, Sfax, Tunisia
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Dai Z, Wang S, Zhang W, Yang Y. Elevated Expression of RPA3 Is Involved in Gastric Cancer Tumorigenesis and Associated with Poor Patient Survival. Dig Dis Sci 2017; 62:2369-2375. [PMID: 28766245 DOI: 10.1007/s10620-017-4696-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 07/26/2017] [Indexed: 12/09/2022]
Abstract
BACKGROUND The replication protein A3 (RPA3) is a component of the RPA protein complex, which plays an essential role in multiple processes of DNA metabolism. AIMS However, the involvement of RPA3 in gastric cancer tumorigenesis has not yet been investigated. METHODS We stably knocked down RPA3 expression using short hairpin RNA in AGS cell line, and performed cell growth, colony formation and soft agar assays. Xenograft experiments were performed to examine tumor promoting properties of RPA3 in vivo. The qRT-PCR and immunohistochemistry were performed to evaluate RPA3 expression levels in 37 and 12 pairs of gastric cancer patient samples, respectively. Association between RPA3 expression and survival was evaluated in an independent cohort of 85 gastric cancer patients. RESULTS Downregulation of RPA3 inhibited cell growth, clonogenicity and soft agar growth in AGS cells. Decreased expression of RPA3 significantly reduced tumor growth rate in AGS xenografts. In addition, RPA3 was upregulated in cancerous tissues compared with matched noncancerous adjacent tissues in gastric cancer patients. High expression of RPA3 was associated with poor patient survival. CONCLUSION Upregulation of RPA3 is involved in gastric cancer tumorigenesis and is associated with poorer patient survival. RPA3 represents a new therapeutic target of gastric cancer and serves as a potential prognostic biomarker for patient survival in gastric cancer.
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Affiliation(s)
- Zhongming Dai
- Department of Digestive Disease, PLA General Hospital, Beijing, 100853, People's Republic of China.,Department of Digestive Disease, Xinjiang Military Region General Hospital, Urumuqi, 830000, Xinjiang Province, People's Republic of China
| | - Shufang Wang
- Department of Digestive Disease, PLA General Hospital, Beijing, 100853, People's Republic of China
| | - Weiping Zhang
- Department of Digestive Disease, Suzhou BenQ Hospital, Suzhou, 215000, Jiangsu Province, People's Republic of China
| | - Yunsheng Yang
- Department of Digestive Disease, PLA General Hospital, Beijing, 100853, People's Republic of China.
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Liu S, Fei W, Shi Q, Li Q, Kuang Y, Wang C, He C, Hu X. CHAC2, downregulated in gastric and colorectal cancers, acted as a tumor suppressor inducing apoptosis and autophagy through unfolded protein response. Cell Death Dis 2017; 8:e3009. [PMID: 28837156 PMCID: PMC5596586 DOI: 10.1038/cddis.2017.405] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 07/14/2017] [Accepted: 07/16/2017] [Indexed: 12/13/2022]
Abstract
Tumor suppressor genes play a key role in cancer pathogenesis. Through massive expression profiling we identified CHAC2 as a frequently downregulated gene in gastric and colorectal cancers. Immunohistochemistry and western blot revealed that CHAC2 was downregulated in most tumor tissues, and 3-year survival rate of patients with high CHAC2 expression was significantly higher than that of patients with low CHAC2 expression (P<0.001 and P=0.001, respectively). The data of univariate analysis and multivariate analysis suggested that CHAC2 could serve as an independent prognostic marker. Our results showed for the first time that CHAC2 was degraded by the ubiquitin-proteasome pathway and CHAC2 expression inhibited tumor cell growth, proliferation, migration in vitro and in vivo. Mechanistic study showed that CHAC2 induced mitochondrial apoptosis and autophagy through unfolded protein response. So in gastric and colorectal cancer CHAC2 acted as a tumor suppressor and might have therapeutic implication for patients.
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Affiliation(s)
- Shuiping Liu
- Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China
| | - Weiqiang Fei
- Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China
| | - Qinglan Shi
- Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China
| | - Qiang Li
- Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China
| | - Yeye Kuang
- Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China
| | - Chan Wang
- Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China
| | - Chao He
- Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China
| | - Xiaotong Hu
- Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China
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25
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Zhang Z, Xin S, Gao M, Cai Y. Promoter hypermethylation of MGMT gene may contribute to the pathogenesis of gastric cancer: A PRISMA-compliant meta-analysis. Medicine (Baltimore) 2017; 96:e6708. [PMID: 28445279 PMCID: PMC5413244 DOI: 10.1097/md.0000000000006708] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
BECKGROUND The association of MGMT (O-methyguanine deoxyribonucleic acid methyltransferase) promoter hypermethylation with gastric cancer (GC) risk has been studied extensively, but the results remained unclear. Here, we performed a meta-analysis to evaluate whether promoter hypermethylation of the MGMT gene contributed to gastric pathogenesis. METHODS Relevant studies were identified by retrieving the PubMed, Web of Science, Embase, and China National Knowledge Infrastructure (CNKI) databases. The Newcastle-Ottawa Scale was applied to assess methodological quality of the included studies. Pooled odds ratios (ORs) and 95% confidence intervals (95% CIs) were calculated to evaluate the association of MGMT promoter hypermethylation with gastric pathogenesis. Moreover, STATA 12.0 software was used to summarize the extracted data in this meta-analysis. RESULTS Seventeen studies, comprising 1736 cases and 1291 controls, were included in this meta-analysis. The frequency of MGMT promoter hypermethylation in the GC group (32.97%) was significantly higher than those in the control group (18.00%) (OR = 2.83, CI = 1.93-4.15, P < .05). When stratified by cancer subtype, the results indicated that the frequency of MGMT promoter hypermethylation was significantly higher in gastric adenocarcinoma than in control group (OR = 3.47, CI = 1.06-11.35, P < .05). In addition, MGMT promoter hypermethylation significantly promoted distant metastasis and lymph node (LN) metastasis of gastric tumor (for distant metastasis, OR = 4.22, CI = 2.42-7.37, P < .05; for LN metastasis, OR = 1.56, CI = 1.14-2.13, P < .05). A significant association between MGMT promoter hypermethylation and TNM-stage was also found in the present meta-analysis (OR = 2.70, CI = 1.79-4.08, P < .05). CONCLUSION The results of this meta-analysis suggested that MGMT gene-promoter hypermethylation was significantly associated with an increased risk of GC, especially in Asians. Furthermore, MGMT gene-promoter hypermethylation might be correlated with the distant metastasis and LN metastasis of GC.
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Affiliation(s)
- Zongxin Zhang
- Department of Clinical Laboratory, Huzhou Central Hospital
| | - Shaojun Xin
- Department of Clinical Laboratory, Huzhou Central Hospital
| | - Min Gao
- Department of Clinical Laboratory, Huzhou Central Hospital
| | - Yunxiang Cai
- Department of Clinical Laboratory, The First People's Hospital of Huzhou, Huzhou, Zhejiang, China
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Calcagno DQ, Takeno SS, Gigek CO, Leal MF, Wisnieski F, Chen ES, Araújo TMT, Lima EM, Melaragno MI, Demachki S, Assumpção PP, Burbano RR, Smith MC. Identification of IL11RA and MELK amplification in gastric cancer by comprehensive genomic profiling of gastric cancer cell lines. World J Gastroenterol 2016; 22:9506-9514. [PMID: 27920471 PMCID: PMC5116594 DOI: 10.3748/wjg.v22.i43.9506] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 09/10/2016] [Accepted: 10/10/2016] [Indexed: 02/06/2023] Open
Abstract
AIM To identify common copy number alterations on gastric cancer cell lines.
METHODS Four gastric cancer cell lines (ACP02, ACP03, AGP01 and PG100) underwent chromosomal comparative genome hybridization and array comparative genome hybridization. We also confirmed the results by fluorescence in situ hybridization analysis using the bacterial artificial chromosome clone and quantitative real time PCR analysis.
RESULTS The amplification of 9p13.3 was detected in all cell lines by both methodologies. An increase in the copy number of 9p13.3 was also confirmed by fluorescence in situ hybridization analysis. Moreover, the interleukin 11 receptor alpha (IL11RA) and maternal embryonic leucine zipper kinase (MELK) genes, which are present in the 9p13.3 amplicon, revealed gains of the MELK gene in all the cell lines studied. Additionally, a gain in the copy number of IL11RA and MELK was observed in 19.1% (13/68) and 55.9% (38/68) of primary gastric adenocarcinoma samples, respectively.
CONCLUSION The characterization of a small gain region at 9p13.3 in gastric cancer cell lines and primary gastric adenocarcinoma samples has revealed MELK as a candidate target gene that is possibly related to the development of gastric cancer.
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Yu Q, Wang X, Wang L, Zheng J, Wang J, Wang B. Knockdown of asparagine synthetase (ASNS) suppresses cell proliferation and inhibits tumor growth in gastric cancer cells. Scand J Gastroenterol 2016; 51:1220-6. [PMID: 27251594 DOI: 10.1080/00365521.2016.1190399] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE Asparagine synthetase (ASNS) gene encodes an enzyme that catalyzes the glutamine- and ATP-dependent conversion of aspartic acid to asparagine. ASNS is deemed as a promising therapeutic target and its expression is associated with the chemotherapy resistance in several human cancers. However, its role in gastric cancer tumorigenesis has not been investigated. METHODS In this study, we employed small interfering RNA (siRNA) to transiently knockdown ASNS in two gastric cancer cell lines, AGS and MKN-45, followed by growth rate assay and colony formation assay. Dose response curve analysis was performed in AGS and MKN-45 cells with stable ASNS knockdown to assess sensitivity to cisplatin. Xenograft experiment was performed to examine in vivo synergistic effects of ASNS depletion and cisplatin on tumor growth. Expression level of ASNS was evaluated in human patient samples using quantitative PCR. Kaplan-Meier curve analysis was performed to evaluate association between ASNS expression and patient survival. RESULTS Transient knockdown of ASNS inhibited cell proliferation and colony formation in AGS and MKN-45 cells. Stable knockdown of ASNS conferred sensitivity to cisplatin in these cells. Depletion of ASNS and cisplatin treatment exerted synergistic effects on tumor growth in AGS xenografts. Moreover, ASNS was found to be up-regulated in human gastric cancer tissues compared with matched normal colon tissues. Low expression of ASNS was significantly associated with better survival in gastric cancer patients. CONCLUSION ASNS may contribute to gastric cancer tumorigenesis and may represent a novel therapeutic target for prevention or intervention of gastric cancer.
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Affiliation(s)
- Qingxiang Yu
- a Department of Gastroenterology and Hepatology , General Hospital, Tianjin Medical University , Tianjin , PR China
| | - Xiaoyu Wang
- a Department of Gastroenterology and Hepatology , General Hospital, Tianjin Medical University , Tianjin , PR China
| | - Li Wang
- a Department of Gastroenterology and Hepatology , General Hospital, Tianjin Medical University , Tianjin , PR China
| | - Jia Zheng
- a Department of Gastroenterology and Hepatology , General Hospital, Tianjin Medical University , Tianjin , PR China
| | - Jiang Wang
- a Department of Gastroenterology and Hepatology , General Hospital, Tianjin Medical University , Tianjin , PR China
| | - Bangmao Wang
- a Department of Gastroenterology and Hepatology , General Hospital, Tianjin Medical University , Tianjin , PR China
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Zeng Y, Fu M, Wu GW, Zhang AZ, Chen JP, Lin HY, Fu YA, Jia J, Cai ZD, Wu XJ, Lan P. Upregulation of microRNA-370 promotes cell apoptosis and inhibits proliferation by targeting PTEN in human gastric cancer. Int J Oncol 2016; 49:1589-99. [DOI: 10.3892/ijo.2016.3642] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 07/06/2016] [Indexed: 11/06/2022] Open
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29
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Montenegro RC, Clark PG, Howarth A, Wan X, Ceroni A, Siejka P, Nunez-Alonso GA, Monteiro O, Rogers C, Gamble V, Burbano R, Brennan PE, Tallant C, Ebner D, Fedorov O, O'Neill E, Knapp S, Dixon D, Müller S. BET inhibition as a new strategy for the treatment of gastric cancer. Oncotarget 2016; 7:43997-44012. [PMID: 27259267 PMCID: PMC5190074 DOI: 10.18632/oncotarget.9766] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 05/04/2016] [Indexed: 12/22/2022] Open
Abstract
Gastric cancer is one of the most common malignancies and a leading cause of cancer death worldwide. The prognosis of stomach cancer is generally poor as this cancer is not very sensitive to commonly used chemotherapies. Epigenetic modifications play a key role in gastric cancer and contribute to the development and progression of this malignancy. In order to explore new treatment options in this target area we have screened a library of epigenetic inhibitors against gastric cancer cell lines and identified inhibitors for the BET family of bromodomains as potent inhibitors of gastric cancer cell proliferations. Here we show that both the pan-BET inhibitor (+)-JQ1 as well as a newly developed specific isoxazole inhibitor, PNZ5, showed potent inhibition of gastric cancer cell growth. Intriguingly, we found differences in the antiproliferative response between gastric cancer cells tested derived from Brazilian patients as compared to those from Asian patients, the latter being largely resistant to BET inhibition. As BET inhibitors are entering clinical trials these findings provide the first starting point for future therapies targeting gastric cancer.
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Affiliation(s)
- Raquel C. Montenegro
- The Structural Genomics Consortium, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7DQ, UK
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7FZ, UK
- Federal University of Pará, Institute of Biological Sciences, Belém, Pará 66075-110, Brazil
| | - Peter G.K. Clark
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, UK
| | - Alison Howarth
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7FZ, UK
| | - Xiao Wan
- CRUK/MRC Oxford Institute of Radiation Biology, University of Oxford, Headington OX3 7DQ, UK
| | - Alessandro Ceroni
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7FZ, UK
| | - Paulina Siejka
- The Structural Genomics Consortium, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7DQ, UK
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7FZ, UK
| | - Graciela A. Nunez-Alonso
- The Structural Genomics Consortium, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7DQ, UK
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7FZ, UK
| | - Octovia Monteiro
- The Structural Genomics Consortium, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7DQ, UK
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7FZ, UK
| | - Catherine Rogers
- The Structural Genomics Consortium, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7DQ, UK
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7FZ, UK
| | - Vicki Gamble
- The Structural Genomics Consortium, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7DQ, UK
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7FZ, UK
| | - Rommel Burbano
- Federal University of Pará, Institute of Biological Sciences, Belém, Pará 66075-110, Brazil
| | - Paul E. Brennan
- The Structural Genomics Consortium, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7DQ, UK
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7FZ, UK
| | - Cynthia Tallant
- The Structural Genomics Consortium, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7DQ, UK
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7FZ, UK
| | - Daniel Ebner
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7FZ, UK
| | - Oleg Fedorov
- The Structural Genomics Consortium, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7DQ, UK
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7FZ, UK
| | - Eric O'Neill
- CRUK/MRC Oxford Institute of Radiation Biology, University of Oxford, Headington OX3 7DQ, UK
| | - Stefan Knapp
- The Structural Genomics Consortium, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7DQ, UK
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7FZ, UK
- Institute for Pharmaceutical Chemistry and Buchmann Institute for Life Sciences, Frankfurt am Main D-60438, Germany
| | - Darren Dixon
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, UK
| | - Susanne Müller
- The Structural Genomics Consortium, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7DQ, UK
- Target Discovery Institute, Nuffield Department of Medicine, University of Oxford, Headington, Oxford OX3 7FZ, UK
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Menheniott TR, O'Connor L, Chionh YT, Däbritz J, Scurr M, Rollo BN, Ng GZ, Jacobs S, Catubig A, Kurklu B, Mercer S, Minamoto T, Ong DE, Ferrero RL, Fox JG, Wang TC, Sutton P, Judd LM, Giraud AS. Loss of gastrokine-2 drives premalignant gastric inflammation and tumor progression. J Clin Invest 2016; 126:1383-400. [PMID: 26974160 DOI: 10.1172/jci82655] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 02/04/2016] [Indexed: 12/11/2022] Open
Abstract
Chronic mucosal inflammation is associated with a greater risk of gastric cancer (GC) and, therefore, requires tight control by suppressive counter mechanisms. Gastrokine-2 (GKN2) belongs to a family of secreted proteins expressed within normal gastric mucosal cells. GKN2 expression is frequently lost during GC progression, suggesting an inhibitory role; however, a causal link remains unsubstantiated. Here, we developed Gkn2 knockout and transgenic overexpressing mice to investigate the functional impact of GKN2 loss in GC pathogenesis. In mouse models of GC, decreased GKN2 expression correlated with gastric pathology that paralleled human GC progression. At baseline, Gkn2 knockout mice exhibited defective gastric epithelial differentiation but not malignant progression. Conversely, Gkn2 knockout in the IL-11/STAT3-dependent gp130F/F GC model caused tumorigenesis of the proximal stomach. Additionally, gastric immunopathology was accelerated in Helicobacter pylori-infected Gkn2 knockout mice and was associated with augmented T helper cell type 1 (Th1) but not Th17 immunity. Heightened Th1 responses in Gkn2 knockout mice were linked to deregulated mucosal innate immunity and impaired myeloid-derived suppressor cell activation. Finally, transgenic overexpression of human gastrokines (GKNs) attenuated gastric tumor growth in gp130F/F mice. Together, these results reveal an antiinflammatory role for GKN2, provide in vivo evidence that links GKN2 loss to GC pathogenesis, and suggest GKN restoration as a strategy to restrain GC progression.
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31
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Dziegiel P, Pula B, Kobierzycki C, Stasiolek M, Podhorska-Okolow M. The Role of Metallothioneins in Carcinogenesis. ADVANCES IN ANATOMY EMBRYOLOGY AND CELL BIOLOGY 2016. [DOI: 10.1007/978-3-319-27472-0_4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Figura N, Marano L, Moretti E, Ponzetto A. Helicobacter pylori infection and gastric carcinoma: Not all the strains and patients are alike. World J Gastrointest Oncol 2016; 8:40-54. [PMID: 26798436 PMCID: PMC4714145 DOI: 10.4251/wjgo.v8.i1.40] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Revised: 10/06/2015] [Accepted: 11/03/2015] [Indexed: 02/05/2023] Open
Abstract
Gastric carcinoma (GC) develops in only 1%-3% of Helicobacter pylori (H. pylori) infected people. The role in GC formation of the bacterial genotypes, gene polymorphisms and host's factors may therefore be important. The risk of GC is enhanced when individuals are infected by strains expressing the oncoprotein CagA, in particular if CagA has a high number of repeats containing the EPIYA sequence in its C'-terminal variable region or particular amino acid sequences flank the EPIYA motifs. H. pylori infection triggers an inflammatory response characterised by an increased secretion of some chemokines by immunocytes and colonised gastric epithelial cells; these molecules are especially constituted by proteins composing the interleukin-1beta (IL-1β) group and tumour necrosis factor-alpha (TNF-α). Polymorphisms in the promoter regions of genes encoding these molecules, could account for high concentrations of IL-1β and TNF-α in the gastric mucosa, which may cause hypochlorhydria and eventually GC. Inconsistent results have been attained with other haplotypes of inflammatory and anti-inflammatory cytokines. Genomic mechanisms of GC development are mainly based on chromosomal or microsatellite instability (MSI) and deregulation of signalling transduction pathways. H. pylori infection may induce DNA instability and breaks of double-strand DNA in gastric mucocytes. Different H. pylori strains seem to differently increase the risk of cancer development run by the host. Certain H. pylori genotypes (such as the cagA positive) induce high degrees of chronic inflammation and determine an increase of mutagenesis rate, oxidative-stress, mismatch repair mechanisms, down-regulation of base excision and genetic instability, as well as generation of reactive oxygen species that modulate apoptosis; these phenomena may end to trigger or concur to GC development.
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Huang J, Bai Y, Huo L, Xiao J, Fan X, Yang Z, Chen H, Yang Z. Upregulation of a disintegrin and metalloprotease 8 is associated with progression and prognosis of patients with gastric cancer. Transl Res 2015; 166:602-13. [PMID: 26024798 DOI: 10.1016/j.trsl.2015.05.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 04/29/2015] [Accepted: 05/01/2015] [Indexed: 02/04/2023]
Abstract
A disintegrin and metalloprotease 8 (ADAM8) is involved in the tumorigenesis of several types of solid tumors. However, its exact role in gastric cancer (GC) remains unclear. The aim of this study was to evaluate the clinical significance of ADAM8 in GC and to explore its biological effects on gastric carcinogenesis. In this study, quantitative reverse transcription-polymerase chain reaction, Western blotting, and immunohistochemical staining analysis revealed that ADAM8 messenger RNA expression was significantly upregulated in GC tissues compared with noncancerous tissues (P = 0.004), and that positive ADAM8 expression is much more common in tumor tissues compared with normal tissues (P < 0.001) and is correlated with T stage (P = 0.036), N stage (P = 0.048), vessel invasion (P = 0.002), and a shorter patient overall survival (P = 0.024). In vitro assay indicated that ADAM8 overexpression promoted cell growth and increased migration and invasion abilities by decreasing the p-p38/p-extracellular regulated protein kinases (p-ERK) ratio. In conclusion, ADAM8 promotes GC cell proliferation and invasion, and its expression is positively correlated with poor survival, indicating that it might be a promising target in GC therapy.
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Affiliation(s)
- Jintuan Huang
- Department of Gastrointestinal Surgery, The Sixth Affiliated Hospital of Sun Yat-Sen University (Guangdong Gastrointestinal and Anal Hospital), Sun Yat-Sen University, Guangzhou, PR China; Guangdong Institute of Gastroenterology, Guangzhou, PR China
| | - Yang Bai
- Department of Gastrointestinal Surgery, The Sixth Affiliated Hospital of Sun Yat-Sen University (Guangdong Gastrointestinal and Anal Hospital), Sun Yat-Sen University, Guangzhou, PR China; Guangdong Institute of Gastroenterology, Guangzhou, PR China; Department of Colorectal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou, PR China
| | - Lijun Huo
- Department of Ophthalmology, The First Affiliated Hospital of Sun Yat-Sen University, Sun Yat-Sen University, Guangzhou, PR China
| | - Jian Xiao
- Department of Medical Oncology, The Sixth Affiliated Hospital of Sun Yat-Sen University (Guangdong Gastrointestinal and Anal Hospital), Sun Yat-Sen University, Guangzhou, PR China
| | - Xinjuan Fan
- Guangdong Institute of Gastroenterology, Guangzhou, PR China
| | - Zihuan Yang
- Guangdong Institute of Gastroenterology, Guangzhou, PR China
| | - Hao Chen
- Department of Gastrointestinal Surgery, The Sixth Affiliated Hospital of Sun Yat-Sen University (Guangdong Gastrointestinal and Anal Hospital), Sun Yat-Sen University, Guangzhou, PR China
| | - Zuli Yang
- Department of Gastrointestinal Surgery, The Sixth Affiliated Hospital of Sun Yat-Sen University (Guangdong Gastrointestinal and Anal Hospital), Sun Yat-Sen University, Guangzhou, PR China; Guangdong Institute of Gastroenterology, Guangzhou, PR China.
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Mello AA, Leal MF, Rey JA, Pinto GR, Lamarão LM, Montenegro RC, Alves APNN, Assumpção PP, Borges BDN, Smith MC, Burbano RR. Deregulated Expression of SRC, LYN and CKB Kinases by DNA Methylation and Its Potential Role in Gastric Cancer Invasiveness and Metastasis. PLoS One 2015; 10:e0140492. [PMID: 26460485 PMCID: PMC4604160 DOI: 10.1371/journal.pone.0140492] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 09/25/2015] [Indexed: 12/29/2022] Open
Abstract
Kinases are downstream modulators and effectors of several cellular signaling cascades and play key roles in the development of neoplastic disease. In this study, we aimed to evaluate SRC, LYN and CKB protein and mRNA expression, as well as their promoter methylation, in gastric cancer. We found elevated expression of SRC and LYN kinase mRNA and protein but decreased levels of CKB kinase, alterations that may have a role in the invasiveness and metastasis of gastric tumors. Expression of the three studied kinases was also associated with MYC oncogene expression, a possible biomarker for gastric cancer. To understand the mechanisms that regulate the expression of these genes, we evaluated the DNA promoter methylation of the three kinases. We found that reduced SRC and LYN methylation and increased CKB methylation was associated with gastric cancer. The reduced SRC and LYN methylation was associated with increased levels of mRNA and protein expression, suggesting that DNA methylation is involved in regulating the expression of these kinases. Conversely, reduced CKB methylation was observed in samples with reduced mRNA and protein expression, suggesting CKB expression was found to be only partly regulated by DNA methylation. Additionally, we found that alterations in the DNA methylation pattern of the three studied kinases were also associated with the gastric cancer onset, advanced gastric cancer, deeper tumor invasion and the presence of metastasis. Therefore, SRC, LYN and CKB expression or DNA methylation could be useful markers for predicting tumor progression and targeting in anti-cancer strategies.
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Affiliation(s)
- Adriano Azevedo Mello
- Centro de Ciências Biológicas e da Saúde, Universidade Federal de Campina Grande, Campina Grande, PB, Brazil
| | - Mariana Ferreira Leal
- Disciplina de Genética, Departamento de Morfologia e Genética, Universidade Federal de São Paulo, São Paulo, SP, Brazil
- Departamento de Ortopedia e Traumatologia, Universidade Federal de São Paulo, São Paulo, SP, Brazil
- * E-mail:
| | - Juan Antonio Rey
- Laboratorio de Oncogenética Molecular, Hospital Universitario La Paz, Madrid, Madrid, Spain
| | | | - Leticia Martins Lamarão
- Laboratório de Testes de Ácidos Nucleicos, Fundação Centro de Hemoterapia e Hematologia do Pará, Belém, PA, Brazil
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | | | | | - Paulo Pimentel Assumpção
- Núcleo de Pesquisa em Oncologia, Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, PA, Brazil
| | - Barbara do Nascimento Borges
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
- Centro de Tecnologia Agropecuária, Instituto Socioambiental e dos Recursos Hídricos, Universidade Federal Rural da Amazônia, Belém, PA, Brazil
| | - Marília Cardoso Smith
- Disciplina de Genética, Departamento de Morfologia e Genética, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Rommel Rodriguez Burbano
- Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
- Núcleo de Pesquisa em Oncologia, Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, PA, Brazil
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Kit OI, Vodolazhsky DI, Kutilin DS, Gudueva EN. Changes in the number of copies of genetic loci in gastric cancer. Mol Biol 2015. [DOI: 10.1134/s0026893315040093] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Fu DG. Epigenetic alterations in gastric cancer (Review). Mol Med Rep 2015; 12:3223-3230. [PMID: 25997695 PMCID: PMC4526033 DOI: 10.3892/mmr.2015.3816] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 05/22/2015] [Indexed: 12/21/2022] Open
Abstract
Gastric cancer is one of the most common types of cancer and the second most common cause of cancer-related mortality worldwide. An increasing number of recent studies have confirmed that gastric cancer is a multistage pathological state that arises from environmental factors; dietary factors in particulary are considered to play an important role in the etiology of gastric cancer. Improper dietary habits are one of the primary concerns as they influence key molecular events associated with the onset of gastric carcinogenesis. In the field of genetics, anticancer research has mainly focused on the various genetic markers and genetic molecular mechanisms responsible for the development of this of this disease. Some of this research has proven to be very fruitful, providing insight into the possible mechamisms repsonsible for this disease and into possible treatment modalities. However, the mortality rate associated with gastric cancer remains relatively high. Thus, epigenetics has become a hot topic for research, whereby genetic markers are bypassed and this research is directed towards reversible epigenetic events, such as methylation and histone modifications that play a crucial role in carcinogenesis. The present review focuses on the epigenetic events which play an important role in the development and progression of this deadly disease, gastric cancer.
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Affiliation(s)
- Du-Guan Fu
- Department of Cardiology, Xiangyang Hospital Affiliated to Hubei University of Medicine, Xiangyang, Hubei 441000, P.R. China
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Liu X, Cao K, Xu C, Hu T, Zhou L, Cao D, Xiao J, Luo L, Guo Y, Qi Y. GATA-3 augmentation down-regulates Connexin43 in Helicobacter pylori associated gastric carcinogenesis. Cancer Biol Ther 2015; 16:987-96. [PMID: 25901741 DOI: 10.1080/15384047.2015.1030552] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Helicobacter pylori (H. pylori) is a risk factor of gastric carcinoma, and inflammation with H.pylori infection has widely been suggested to trigger gastric carcinogenesis through "inflammation-carcinoma chain" (non-atrophic gastritis (NAG) → chronic atrophic gastritis (CAG) → intestinal metaplasia (IM) → dysplasia (DYS) and gastric carcinoma (GC)). Connexin43 (Cx43) is a major constituent of gap junction in normal gastric mucosa (NGM) and it is continuously down-regulated from normal gastric mucosa to precancerous lesions or ultimate gastric carcinoma, which shows novel target against gastric carcinoma by preventing the Cx43 decline. Our previous studies demonstrated that H. pylori infection in gastric mucosa down-regulates Cx43 expression, but its mechanism remains unknown. The transcriptional factor, GATA binding protein 3 (GATA-3) is the key to regulate adaptive immune response, which possibly relates to inflammation toward malignant transformation. Here the substantial rising of GATA-3 was screened by transcriptional factor microarray along the developmental stages of H. pylori associated gastric carcinoma. Moreover, the increased GATA-3 and inhibited Cx43 were confirmed in clinical specimens, Mongolian gerbils and normal gastric epithelial cell line GES-1 with H. pylori infection. GATA-3 silencing generated the Cx43 restoration both in intermediate differentiation gastric cancer cells BGC-803 and in H. pylori infected GES-1 cells. Dual-luciferase reporter assay further revealed the GATA-3 as one of Cx43 down-regulators by directly binding to its promoters. Together, the incremental GATA-3 is found in H. pylori associated gastric carcinogenesis, which is responsible for Cx43 inhibition as well.
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Key Words
- CAG, chronic atrophic gastritis
- CagA, cytotoxin-associated gene A
- Connexin43
- Cx43, connexin43
- DYS, dysplasia
- GATA-3
- GATA-3, GATA binding protein 3
- GC, gastric carcinoma
- GJ, gap junction
- H. pylori, Helicobacter pylori
- Helicobacter pylori
- IFN-γ, interferon-gamma
- ILC, innate lymphoid cell
- IM, intestinal metaplasia
- NAG, non-atrophic gastritis
- NGM, normal gastric mucosa.
- PBMC, peripheral blood mononuclear cell
- PBS, phosphate buffered saline
- TF, transcriptional factor
- Th1/Th2 cell, type 1/2 T helper cell
- VacA, vacuolating cytotoxin gene A
- carcinogenesis
- gastric carcinoma
- inflammation-carcinoma chain
- transcription factor
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Affiliation(s)
- Xiaoming Liu
- a Department of Gastroenterology ; Third Xiangya Hospital ; Central South University ; Changsha , PR China
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Cui Y, Gao D, Linghu E, Zhan Q, Chen R, Brock MV, Herman JG, Guo M. Epigenetic changes and functional study of HOXA11 in human gastric cancer. Epigenomics 2015; 7:201-13. [PMID: 25590359 DOI: 10.2217/epi.14.92] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
AIM To examine epigenetic changes and the function of HOXA11 in human gastric cancer (GC). MATERIALS & METHODS Seven GC cell lines, five cases of normal gastric mucosa and 112 cases primary GC samples were used in this study. RESULTS Expression of HOXA11 and lack of promoter region methylation were found in NCI-N87, MKN45, BGC823 and HGC27 cells. Loss of expression and complete methylation were found in AGS gastric cancer cells. Reduced expression and partial methylation were found in MGC803 and SGC7901 cells. Restoration of HOXA11 expression was induced by 5-aza-2'-deoxycytidine. HOXA11 was methylated in 81.25% (91/112) of primary GCs. The presence of methylation was associated with male gender, tumor size, tumor differentiation and lymph node metastasis (all p < 0.05). Restoration of HOXA11 expression reduced cell proliferation, invasion, migration and induced apoptosis and G2/M phase arrest. HOXA11 was found to inhibit Wnt signaling by upregulating NKD1 expression. CONCLUSION Epigenetic silencing of HOXA11 promotes GC proliferation, migration and invasion through activation of Wnt signaling.
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Affiliation(s)
- Yingying Cui
- Department of Gastroenterology & Hepatology, Chinese PLA General Hospital, Beijing, China
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Associations of NR5A2 gene polymorphisms with the clinicopathological characteristics and survival of gastric cancer. Int J Mol Sci 2014; 15:22902-17. [PMID: 25514243 PMCID: PMC4284745 DOI: 10.3390/ijms151222902] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 10/15/2014] [Accepted: 11/16/2014] [Indexed: 02/07/2023] Open
Abstract
The orphan nuclear receptor (NR5A2), which belongs to the NR5A subfamily of nuclear receptors, is expressed in developing and adult tissues of endodermal origin, and can contribute to the development of several cancers through regulating cell proliferation. NR5A2 (rs3790843 and rs3790844) single nucleotide polymorphisms (SNPs) genotyping were examined in DNA samples, extracted from paraffin-embedded cancer tissue. Clinicopathologic and follow-up data were collected from 944 patients with gastric cancer (GC). Associations of the 2 SNPs with the progression and prognosis in gastric cancer patients were analyzed using the SPSS version 18.0. We found that NR5A2 rs3790843 polymorphism was significantly associated with the risk of GC which had regional lymph node metastasis (p = 0.044) or distant metastasis (p = 0.020). Our results also indicated that rs3790844 polymorphism was associated with the increased overall survival (OS) of GC patients in the dominant model (GG vs. GA/AA, HR (hazard ratio) = 0.823, 95% CI (confidence interval) = 0.679–0.997), suggesting a potential protective role of the variant A allele. Additionally, in the stratified analysis, both NR5A2 rs3790843 and rs3790844 polymorphism were associated with significantly lower risk of death in the groups of female, tumor size >5 cm in a dominant model. Our results represent the first demonstration that the NR5A2 rs3790844 polymorphism is associated with increased OS of GC patients in the dominant model, and similar results were found among the female group and tumor size >5 cm group for NR5A2 rs3790843 polymorphism. Further validation in other larger studies with different ethnic populations and functional evaluations are needed.
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Park JW, Park DM, Choi BK, Kwon BS, Seong JK, Green JE, Kim DY, Kim HK. Establishment and characterization of metastatic gastric cancer cell lines from murine gastric adenocarcinoma lacking Smad4, p53, and E-cadherin. Mol Carcinog 2014; 54:1521-7. [DOI: 10.1002/mc.22226] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2014] [Revised: 08/06/2014] [Accepted: 08/13/2014] [Indexed: 02/04/2023]
Affiliation(s)
- Jun Won Park
- National Cancer Center; Goyang Gyeonggi Republic of Korea
- College of Veterinary Medicine; Seoul National University; Seoul Republic of Korea
| | - Dong Min Park
- National Cancer Center; Goyang Gyeonggi Republic of Korea
| | - Beom K. Choi
- National Cancer Center; Goyang Gyeonggi Republic of Korea
| | - Byoung S. Kwon
- National Cancer Center; Goyang Gyeonggi Republic of Korea
| | - Je Kyung Seong
- College of Veterinary Medicine; Seoul National University; Seoul Republic of Korea
| | - Jeffrey E. Green
- Laboratory of Cancer Biology and Genetics; National Cancer Institute; Bethesda Maryland
| | - Dae-Yong Kim
- College of Veterinary Medicine; Seoul National University; Seoul Republic of Korea
| | - Hark Kyun Kim
- National Cancer Center; Goyang Gyeonggi Republic of Korea
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Yang M, Kim HS, Cho MY. Different methylation profiles between intestinal and diffuse sporadic gastric carcinogenesis. Clin Res Hepatol Gastroenterol 2014; 38:613-20. [PMID: 24953529 DOI: 10.1016/j.clinre.2014.03.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 02/25/2014] [Accepted: 03/28/2014] [Indexed: 02/08/2023]
Abstract
OBJECTIVE Gastric cancer (GC) is histologically classified into intestinal type and diffuse type, and diffuse type cancer can be further subdivided into poorly differentiated carcinoma (PDC) and signet ring cell carcinoma (SRCC). Recent evidence suggests that early SRCC is an initial, differentiated form of diffuse GC that may evolve into PDC. This study aimed at identifying the molecular features of epigenetic methylation changes in histologic differentiation status of GC. METHODS Included in this study are 149 samples of paraffin-embedded tissues and 115 fresh endoscopically biopsied tissues. Multiple paraffin tissues involving normal (n=22), dysplasias (GDs, n=39), differentiated cancers (DCs, n=35), PDCs (n=33) and SRCCs (n=20) were included as an experimental group. For the validation group, endoscopically biopsied tissues of DCs (n=50), PDCs (n=31), and SRCs (n=34) were analyzed. DNAs, isolated from each group were analyzed to determine the methylation status of 6 genes (GDNF, RORA, MINT25, KLF7, CDH1, LINE-1) using pyrosequencing. RESULTS LINE-1 was hypomethylated in GCs compared to normal and GD. GDNF, RORA and MINT25 were more hypermethylated in intestinal type GCs than those of diffuse type GCs, whereas CDH1 showed opposite patterns of methylation. Among diffuse type GCs, SRCCs showed lower level of methylation for GDNF, RORA, MINT25 and KLF7, and higher level for CDH1 compared to PDCs. CONCLUSIONS In conclusion, intestinal type of GCs shows different epigenetic methylation profiles compared to the diffuse one. Moreover, SRCCs have different methylation profiles compared with PDCs, suggesting a unique molecular pathway in the gastric carcinogenesis.
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Affiliation(s)
- Misuk Yang
- Division of Gastroenterology, Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
| | - Hyun-Soo Kim
- Division of Gastroenterology, Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea.
| | - Mee Yon Cho
- Department of Pathology, Yonsei University Wonju College of Medicine, Wonju, Republic of Korea
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Ayed DB, Khabir A, Abid M, Bayrouti MI, Gargouri A, Sellami-Boudawara T, Mokdad-Gargouri R. Clinicopathological and prognostic significance of p53, Ki-67, and Bcl-2 expression in Tunisian gastric adenocarcinomas. Acta Histochem 2014; 116:1244-50. [PMID: 25095748 DOI: 10.1016/j.acthis.2014.07.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Revised: 07/14/2014] [Accepted: 07/15/2014] [Indexed: 02/04/2023]
Abstract
Gastric carcinoma (GC) is a highly aggressive malignancy with poor prognosis. It is widely accepted that malignancy results from abnormal cell growth due to dysregulation of the balance between cell proliferation and apoptosis. Our study aimed to investigate the clinicopathological and prognostic significance of p53, Ki-67, and Bcl-2 in Tunisian GC patients by immunohistochemistry. It was observed that the older patients showed p53 overexpression compared with the younger patients (p<0.05). There was higher p53 expression in the intestinal-type compared with the diffuse-type (p<0.05), and in well/moderate differentiated than in poor differentiated tumors. The expression of Ki-67 was positively associated with tumor size and venous invasion (p<0.05). Bcl2 expression occurred in male patients and correlated with depth of invasion (p=0.02). A Kaplan-Meier analysis indicated an inverse correlation between p53 and Ki-67 expression and the overall survival. Multivariate analysis revealed that the tumor site, Ki-67 and p53 expression were independent prognostic factors for gastric carcinomas (p<0.05). Finally, combined expression of p53, Ki-67 and Bcl-2 showed that the group of patients with tumors p53+/Ki-67+/Bcl2- had aggressive behavior and poor prognosis (p log rank=0.000). In summary, our data indicated that the expression of p53, Ki-67, and Bcl-2 may provide useful information for identifying patients with aggressive behavior and poor prognosis of GC.
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Affiliation(s)
- Dorra Ben Ayed
- Center of Biotechnology of Sfax, University of Sfax, BP K 3018, Sfax, Tunisia; Department of Anatomy-Pathology, Habib Bourguiba Hospital, Sfax, Tunisia.
| | - Abdelmajid Khabir
- Department of Anatomy-Pathology, Habib Bourguiba Hospital, Sfax, Tunisia
| | - Mohamed Abid
- Department of Surgery, Habib Bourguiba Hospital, Sfax, Tunisia
| | | | - Ali Gargouri
- Center of Biotechnology of Sfax, University of Sfax, BP K 3018, Sfax, Tunisia
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Yoon JH, Choi WS, Kim O, Park WS. The role of gastrokine 1 in gastric cancer. J Gastric Cancer 2014; 14:147-55. [PMID: 25328759 PMCID: PMC4199881 DOI: 10.5230/jgc.2014.14.3.147] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 09/12/2014] [Accepted: 09/13/2014] [Indexed: 12/18/2022] Open
Abstract
Homeostatic imbalance between cell proliferation and death in gastric mucosal epithelia may lead to gastritis and gastric cancer. Despite abundant gastrokine 1 (GKN1) expression in the normal stomach, the loss of GKN1 expression is frequently detected in gastric mucosa infected with Helicobacter pylori, as well as in intestinal metaplasia and gastric cancer tissues, suggesting that GKN1 plays an important role in gastric mucosal defense, and the gene functions as a gastric tumor suppressor. In the stomach, GKN1 is involved in gastric mucosal inflammation by regulating cytokine production, the nuclear factor-κB signaling pathway, and cyclooxygenase-2 expression. GKN1 also inhibits the carcinogenic potential of H. pylori protein CagA by binding to it, and up-regulates antioxidant enzymes. In addition, GKN1 reduces cell viability, proliferation, and colony formation by inhibiting cell cycle progression and epigenetic modification by down-regulating the expression levels of DNMT1 and EZH2, and DNMT1 activity, and inducing apoptosis through the death receptor-dependent pathway. Furthermore, GKN1 also inhibits gastric cancer cell invasion and metastasis via coordinated regulation of epithelial mesenchymal transition-related protein expression, reactive oxygen species production, and PI3K/Akt signaling pathway activation. Although the modes of action of GKN1 have not been clearly described, recent limited evidence suggests that GKN1 acts as a gastric-specific tumor suppressor. This review aims to discuss, comment, and summarize the recent progress in the understanding of the role of GKN1 in gastric cancer development and progression.
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Affiliation(s)
- Jung Hwan Yoon
- Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Won Suk Choi
- Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Olga Kim
- Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Won Sang Park
- Department of Pathology, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Association between TLR2, MTR, MTRR, XPC, TP73, TP53 genetic polymorphisms and gastric cancer: a meta-analysis. Clin Res Hepatol Gastroenterol 2014; 38:346-59. [PMID: 24534481 DOI: 10.1016/j.clinre.2013.12.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 12/06/2013] [Accepted: 12/24/2013] [Indexed: 02/06/2023]
Abstract
OBJECTIVE The aim of our meta-analyses is to test the association between six genetic polymorphisms and gastric cancer. METHODS A systematic search was performed for all the available candidate genes and gastric cancer among several online databases including PubMed, Embase, Web of Science, the Cochrane Library, CNKI and Wanfang online libraries. After a comprehensive screening, a total of six genes were harvested for the current meta-analyses. These genes include TLR2 (-196 to -174 ins>del), MTR (rs1805087), MTRR (rs1801394), XPC (rs2228001), TP73 (G4C14-A4T14), and TP53 (rs1042522). RESULTS Altogether 49 comparative studies among 11 776 cases and 18 633 controls were involved in our meta-analyses. TP53 rs1042522 polymorphism was shown to be associated with gastric cancer risk under the dominant model (P=0.02, OR=1.03, 95% CI=1.00-1.05). A subgroup meta-analysis indicated a significant association under dominant model between TP53 rs1042522 and gastric cancer in the Eastern Asians (P=0.03, OR=1.17, 95%=1.02-1.34). CONCLUSIONS These results suggest that TP53 rs1042522 polymorphism might contribute to the susceptibility of gastric cancer under the dominant model, especially in Eastern Asians.
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Leal MF, Cirilo PDR, Mazzotti TKF, Calcagno DQ, Wisnieski F, Demachki S, Martinez MC, Assumpção PP, Chammas R, Burbano RR, Smith MC. Prohibitin expression deregulation in gastric cancer is associated with the 3' untranslated region 1630 C>T polymorphism and copy number variation. PLoS One 2014; 9:e98583. [PMID: 24879411 PMCID: PMC4039508 DOI: 10.1371/journal.pone.0098583] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Accepted: 05/05/2014] [Indexed: 01/03/2023] Open
Abstract
PHB is a reported oncogene and tumor suppressor in gastric cancer. Here, we evaluated whether the PHB copy number and the rs6917 polymorphism affect its expression in gastric cancer. Down-regulation and up-regulation of PHB were observed in the evaluated tumors. Reduced expression was associated with tumor dedifferentiation and cancer initiation. The T allele of the rs6917 polymorphism was associated with reduced PHB mRNA levels. Moreover, the up-regulation of PHB appeared to be regulated by the gain of additional gene copies. Thus, PHB copy number variation and differential expression of the rs6917 polymorphism may play a role in PHB transcriptional regulation.
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Affiliation(s)
- Mariana Ferreira Leal
- Disciplina de Genética, Departamento de Morfologia e Genética, Universidade Federal de São Paulo, São Paulo, SP, Brazil
- Departamento de Ortopedia e Traumatologia, Universidade Federal de São Paulo, São Paulo, SP, Brazil
- * E-mail:
| | - Priscila Daniele Ramos Cirilo
- Laboratório de Oncologia Experimental, Departamento de Radiologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
- Centro de Investigação Translacional em Oncologia, Instituto do Câncer do Estado de São Paulo, São Paulo, SP, Brazil
| | - Tatiane Katsue Furuya Mazzotti
- Laboratório de Oncologia Experimental, Departamento de Radiologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
- Centro de Investigação Translacional em Oncologia, Instituto do Câncer do Estado de São Paulo, São Paulo, SP, Brazil
| | - Danielle Queiroz Calcagno
- Disciplina de Genética, Departamento de Morfologia e Genética, Universidade Federal de São Paulo, São Paulo, SP, Brazil
- Núcleo de Pesquisa em Oncologia, Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, PA, Brazil
| | - Fernanda Wisnieski
- Disciplina de Genética, Departamento de Morfologia e Genética, Universidade Federal de São Paulo, São Paulo, SP, Brazil
| | - Samia Demachki
- Núcleo de Pesquisa em Oncologia, Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, PA, Brazil
| | - Margarita Cortes Martinez
- Laboratório de Oncologia Experimental, Departamento de Radiologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
- Centro de Investigação Translacional em Oncologia, Instituto do Câncer do Estado de São Paulo, São Paulo, SP, Brazil
| | - Paulo Pimentel Assumpção
- Núcleo de Pesquisa em Oncologia, Hospital Universitário João de Barros Barreto, Universidade Federal do Pará, Belém, PA, Brazil
| | - Roger Chammas
- Laboratório de Oncologia Experimental, Departamento de Radiologia, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
- Centro de Investigação Translacional em Oncologia, Instituto do Câncer do Estado de São Paulo, São Paulo, SP, Brazil
| | - Rommel Rodríguez Burbano
- Laboratório de Citogenética Humana, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil
| | - Marília Cardoso Smith
- Disciplina de Genética, Departamento de Morfologia e Genética, Universidade Federal de São Paulo, São Paulo, SP, Brazil
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Palacio-Rúa KA, Isaza-Jiménez LF, Ahumada-Rodríguez E, Muñetón-Peña CM. Genetic analysis in APC, KRAS, and TP53 in patients with stomach and colon cancer. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO 2014; 79:79-89. [PMID: 24861525 DOI: 10.1016/j.rgmx.2014.05.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 03/10/2014] [Indexed: 02/07/2023]
Abstract
BACKGROUND Stomach cancer (SC) and colorectal cancer (CRC) present with high rates of incidence and mortality in the worldwide population. These 2 tumors are characterized by great genetic heterogeneity. Up to now, there have been no molecular studies that analyze the mutations in the APC, KRAS, and TP53 genes in the Colombian/Latin American population. OBJECTIVES To analyze mutations in the APC, KRAS, and TP53 genes through direct sequencing in 59 patients with SC and CRC. PATIENTS AND METHODS Twenty-nine patients with SC and 30 with CRC were studied. An analysis of the mutations of the 3 genes was carried out using polymerase chain reaction and direct sequencing techniques. RESULTS A 30.5% total mutation frequency was found. The most frequently mutated gene was APC (15.3%), followed by KRAS (10.1%) and TP53 (5.1%). The CRC samples had a mutation frequency of 46.7% and it was 13.3% in the SC samples (P=.006). No mutations occurred simultaneously in the 3 genes. Mutations in 2 genes were found in only 6 tumor samples (10%). There was also a high frequency of polymorphisms in both types of cancer, the most common of which was the rs41115 polymorphism, located on the APC gene. CONCLUSION The APC, KRAS, and TP53 gene mutations were more common in CRC than in SC. Our results suggest the existence of different genetic pathways in the carcinogenesis of SC and CRC and they also reveal a particular mutation frequency in the Colombian patients studied; this could be influenced by factors related to the environment, ethnicity, and lifestyle of this population.
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Affiliation(s)
- K A Palacio-Rúa
- Unidad de Genética Médica, Departamento de Pediatría, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - L F Isaza-Jiménez
- Departamento de Cirugía, Facultad de Medicina, Universidad de Antioquia, Hospital San Vicente de Paúl, Medellín, Colombia
| | - E Ahumada-Rodríguez
- Departamento de Patología, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - C M Muñetón-Peña
- Unidad de Genética Médica, Departamento de Pediatría, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.
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Malhotra A, Nair P, Dhawan DK. Study to evaluate molecular mechanics behind synergistic chemo-preventive effects of curcumin and resveratrol during lung carcinogenesis. PLoS One 2014; 9:e93820. [PMID: 24705375 PMCID: PMC3976304 DOI: 10.1371/journal.pone.0093820] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2013] [Accepted: 03/06/2014] [Indexed: 01/30/2023] Open
Abstract
Background The combination approach is the future of the war against cancer and the present study evaluated molecular mechanics behind the synergistic effects of curcumin and resveratrol during lung carcinogenesis. Methods The mice were segregated into five groups which included normal control, Benzo[a]pyrene[BP] treated, BP+curcumin treated, BP+resveratrol treated and BP+curcumin+resveratrol treated. Results The morphological analyses of tumor nodules confirmed lung carcinogenesis in mice after 22 weeks of single intra-peritoneal[i.p] injection of BP at a dose of 100 mg/Kg body weight. The BP treatment resulted in a significant increase in the protein expressions of p53 in the BP treated mice. Also, a significant increase in the protein expression of phosphorylated p53[ser15] confirmed p53 hyper-phosphorylation in BP treated mice. On the other hand, enzyme activities of caspase 3 and caspase 9 were noticed to be significantly decreased following BP treatment. Further, radiorespirometric studies showed a significant increase in the 14C-glucose turnover as well as 14C-gulcose uptake in the lung slices of BP treated mice. Moreover, a significant rise in the cell proliferation was confirmed indirectly by enhanced uptake of 3H-thymidine in the lung slices of BP treated mice. Interestingly, combined treatment of curcumin and resveratrol to BP treated animals resulted in a significant decrease in p53 hyper-phosphorylation, 14C glucose uptakes/turnover and 3H-thymidine uptake in the BP treated mice. However, the enzyme activities of caspase 3 and caspase 9 showed a significant increase upon treatment with curcumin and resveratrol. Conclusion The study, therefore, concludes that molecular mechanics behind chemo-preventive synergism involved modulation of p53 hyper-phosphorylation, regulation of caspases and cellular metabolism enzymes.
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Affiliation(s)
- Anshoo Malhotra
- Department of Biophysics, Post Graduate Institute of Medical Education and Research [PGIMER], Chandigarh, India
| | - Praveen Nair
- Department of Biophysics, Panjab University, Chandigarh, India
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Genetic analysis in APC, KRAS, and TP53 in patients with stomach and colon cancer. REVISTA DE GASTROENTEROLOGÍA DE MÉXICO 2014. [DOI: 10.1016/j.rgmxen.2014.06.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Park KW, Kim SJ, Oh SY. Clinicopathologic significance of nuclear factor-κB and vascular endothelial growth factor expression in advanced gastric cancer patients. Oncol Res Treat 2014; 37:183-90. [PMID: 24732642 DOI: 10.1159/000360777] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Accepted: 02/04/2014] [Indexed: 11/19/2022]
Abstract
BACKGROUND Nuclear factor-κB (NF-κB) and vascular endothelial growth factor (VEGF) are involved in cell proliferation, invasion, angiogenesis, and metastasis. The principal objective of this study was to assess the prognostic significance of NF-κB and VEGF expression in gastric cancer. METHODS Tumor tissues of 154 patients with gastric cancer, all of whom underwent potentially curative resection, were immunohistochemically evaluated using monoclonal antibodies against NF-κB and VEGF. RESULTS The positivity rates of NF-κB and VEGF staining were 44.2% and 39.6%, respectively. NF-κB expression in tumor tissues was significantly correlated with VEGF expression (p < 0.001). VEGF expression was related to Lauren's classification (p = 0.002), differentiation (p = 0.043), depth of invasion (p = 0.005), carcinoembryonic antigen expression (p = 0.032), and stage (p = 0.026). Univariate analysis demonstrated that NF-κB expression was significantly related to both the 5-year disease-free survival (65.2% vs. 46.4%, p = 0.007) and the 5-year overall survival (60.0% vs. 42.5%, p = 0.014). Multivariate analysis verified that NF-κB was independently associated with disease-free survival (hazard ratio: 2.082, p = 0.005) and overall survival (hazard ratio: 1.841, p = 0.008). CONCLUSION NF-κB expression in tumor tissue is associated with poor survival in gastric cancer patients.
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Affiliation(s)
- Keon Woo Park
- Division of Hematology-Oncology, Department of Medicine, Dankook University Hospital, Cheonan, Korea
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Liu X, Yu H, Cai H, Wang Y. The expression and clinical significance of miR-132 in gastric cancer patients. Diagn Pathol 2014; 9:57. [PMID: 24621117 PMCID: PMC3975191 DOI: 10.1186/1746-1596-9-57] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Accepted: 03/03/2014] [Indexed: 01/06/2023] Open
Abstract
Background and objective miR-132 plays a role in regulating neuronal morphology and cellular excitability. Little is known about the effects of miR-132 in cancer. The aim of this study is to evaluate the expression of miR-132 and its clinical significance in gastric cancer. Methods Cancerous tissues and corresponding normal tissues from 79 patients with gastric cancer were examined for the expression of miR-132 using quantitative PCR and the association between miR-132 expression levels and clinicopathological factors and prognosis was analyzed. Results In 79 clinical samples of gastric cancer patients, miR-132 expression levels in cancer tissues were significantly higher than those in the corresponding normal tissues (P = 0.001). Higher expression levels of miR-132 were associated with more frequent lymph node metastasis (P = 0.033), more lymphatic tumor emboli (P = 0.007), and more advanced stage (P = 0.016). Additionally, expression of miR-132 was an independent prognostic factor for overall survival (P = 0.020). Conclusion miR-132 could serve as an efficient prognostic factor for gastric cancer patients. Virtual slides The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/8168577241196050
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Affiliation(s)
| | | | | | - Yanong Wang
- Department of Gastric Cancer and Soft Tissue Sarcoma, Fudan University Shanghai Cancer Center, 270 Dong An Road, Shanghai 200032, People's Republic of China.
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