Impact of Helicobacter pylori virulence markers on clinical outcomes in adult populations  

作　　者：Halim Roshrosh Hanan Rohana Maya Azrad Tamar Leshem Segula Masaphy Avi Peretz 

机构地区：[1]Applied Mycology and Microbiology,Migal,Kiryat Shemona 1101202,Israel [2]Department of Microbiology,Padeh Poriya Medical Center,Tiberias 111508,Israel

出　　处：《World Journal of Gastroenterology》2023年第1期190-199,共10页世界胃肠病学杂志（英文版）

基　　金：The study was reviewed and approved by the Helsinki Committee of the Baruch Padeh Medical Center,Poriya(Approval No.POR 0007-20).

摘　　要：BACKGROUND In recent years,associations between specific virulence markers of Helicobacter pylori(H.pylori)and gastrointestinal disorders have been suggested.AIM To investigate the presence of virulence factors including vacuolating cytotoxin A genotypes(s1m1,s1m2,s2m1,and s2m2),cytotoxin-associated gene A(CagA),and urease activity in H.pylori strains isolated from Arab and Jewish populations in northern Israel and to assess associations between these factors and patients’demographics and clinical outcomes.METHODS Patients(n=108)who underwent gastroscopy at the Baruch Padeh Medical Center,Poriya due to symptomatic gastroduodenal pathologies as part of H.pylori diagnosis were enrolled in the study.Gastric biopsy specimens were collected from the antrum of the stomach.Clinical condition was assessed by clinical pathology tests.Bacteria were isolated on modified BD Helicobacter Agar(BD Diagnostics,Sparks,MD,United States).Bacterial DNA was extracted,and PCR was performed to detect CagA and vacuolating cytotoxin A genes.Urease activity was assessed using a rapid urease test.RESULTS A significant correlation was found between disease severity and patient ethnicity(P=0.002).A significant correlation was found between CagA presence and the s1m1 genotype(P=0.02),which is considered the most virulent genotype.Further,a higher level of urease activity was associated with isolates originating from the Jewish population.Moreover,higher urease activity levels were measured among CagA-/s1m1 and CagA-/s2m2 isolates.CONCLUSION Our study highlights the importance of incorporating molecular methods for detection of virulence markers of H.pylori in order to tailor optimal treatments for each patient.Further investigation should be performed regarding associations between H.pylori virulence factors and ethnicity.

关 键 词：Helicobacter pylori Virulence factors Vacuolating cytotoxin A Cytotoxin-associated gene A Urease activity 

分 类 号：R573[医药卫生—消化系统]