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Correlation of Helicobacter pylori and interleukin-8 mRNA expression in high risk gastric cancer population prediction

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World Journal of Gastrointestinal Oncology 2016年第2期8卷 215-221页

作者： Wilaiwan Chongruksut Sirikan Limpakan(Yamada) bandhuphat chakrabandhu Chidchanok Ruengorn Sirisak Nanta department of surgery faculty of medicinechiang mai universityChiang Mai 50200Thailand faculty of pharmacy chiang mai universityChiang Mai 50200Thailand mae sai district hospital Chiang Rai 50200Thailand

AIM:To evaluate(1) the association of the Helicobacter pylori(***) test and interleukin-8(IL-8) m RNA expression alone and the severity of gastric cancer(GC);(2) the association of both tests were added to patients' characteristics to identifli Thai suspected patients of gastric cancer who would receive the most benefit; and(3) diagnostic value of levels of IL-8 m RNA expression for gastric ***: A cross-sectional analytical study was completed with 220 patients with 86 GC patients who underwent endoscopy with gastric surgery divided into non-metastasis and metastasis groups,and 134 patients with benign lesions who underwent endoscopic examination,at the Gastrointestinal Surgery and Endoscopy Unit,Chiang Mai University Hospital between 2006 and 2010. Of 220 patients,86 cases of diagnosed gastric adenocarcinoma were in an advanced stage and 134 cases were non-cancer patients. RESULTS: The IL-8 m RNA expression showed predominant association with advanced GC when compared to H. pylori infection alone [OR(95%CI); 0.86(0.49-1.53) vs 5.44(3.08-9.62)] when including the patients' characteristics the highest of the area under the receiver operating characteristic curves(Au ROC) of the model were males older than 40 years of age [AuROC(95%CI); 0.81(0.75-0.86)]. However,preliminary testing for diagnostic indices of four cut-off points of IL-8 m RNA expression to predict the severity of GC cases found an increasing suboptimal trend from the likelihood ratio of positive to differentiate the severity in the GC group. The IL-8 mRNA expression showed a predominant association with GC when compared to H. pylori infection,especially in males older than 40 years of age who may benefit most from this test. CONCLUSION:The future research of IL-8 mRNA expression to predict severity in the gastric cancer group should be warranted.

关键词： Helicobacter pylori Interleukin-8 mRNA expression Gastric cancer

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Predominant mucosal IL-8 mRNA expression in non-cagA Thais is risk for gastric cancer

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World Journal of Gastroenterology 2013年第19期19卷 2941-2949页

作者： Sirikan Yamada Shunji Kato Takeshi Matsuhisa Luksana Makonkawkeyoon Masaru Yoshida Thiraphat chakrabandhu Nirush Lertprasertsuk Pawit Suttharat bandhuphat chakrabandhu Shin Nishiumi Wilaiwan Chongraksut Takeshi Azuma Division of Gastrointestinal Surgery and Endoscopy Department of SurgeryChiang Mai UniversityChiang Mai 50200Thailand Department of Surgery Nippon Medical SchoolSendagiBunkyo-kuTokyo 113-8603Japan Department of Gastroenterology and Endoscopy Tama-Nagayama HospitalNippon Medical SchoolNagayamaTama-shiTokyo 206-8512Japan Department of Biochemistry Faculty of MedicineChiang Mai UniversityChiang Mai 50200Thailand Department of Gastroenterology International Center for Medical Research and treatmentKobe University School of MedicineKobeHyogo 650-0017Japan Department of Pathology Faculty of MedicineChiang Mai UniversityChiang Mai 50200Thailand

AIM: To study gastric mucosal interleukine-8 (IL-8) mRNA expression, the cytotoxin-associated gene A (cagA) mutation, and serum pepsinogen (PG)?I/II ratio related risk in Thai gastric cancer.METHODS: There were consent 134 Thai non-cancer volunteers who underwent endoscopic narrow band imaging examination, and 86 Thais advance gastric cancer patients who underwent endoscopic mucosal biopsies and gastric surgery. Tissue samples were taken by endoscopy with 3 points biopsies. The serum PG?I, II, and Helicobacter pylori (H. pylori) immunoglobulin G (IgG) antibody for H. pylori were tested by enzyme-linked immunosorbent assay technique. The histopathology description of gastric cancer and non-cancer with H. pylori detection was defined with modified Sydney Score System. Gastric mucosal tissue H. pylori DNA was extracted and genotyped for cagA mutation. Tissue IL-8 and cyclooxygenase-2 (COX-2) mRNA expression were conducted by real time relative quantitation polymerase chain reaction. From 17 Japanese advance gastric cancer and 12 benign gastric tissue samples, all were tested for genetic expression with same methods as well as Thai gastric mucosal tissue samples. The multivariate analysis was used for the risk study. Correlation and standardized t-test were done for quantitative data, P value < 0.05 was considered as a statistically significant.RESULTS: There is a high non cagA gene of 86.8 per cent in Thai gastric cancer although there are high yields of the East Asian type in the positive cagA. The H. pylori infection prevalence in this study is reported by combined histopathology and H. pylori IgG antibody test with 77.1% and 97.4% of sensitivity and specificity, respectively. The serum PG?I/II ratio in gastric cancer is significantly lower than in the non-cancer group, P = 0.045. The serum PG?I/II ratio of less than 3.0 and IL-8 mRNA expression ≥ 100 or log10 ≥ 2 are significant cut off risk differences between Thai cancer and non-cancer, P = 0.03 and P < 0.001,

关键词： Gastric cancer CagA mutation Interleukine-8 mRNA expression Helicobacter pylori Pepsinogen I/II ratio

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