GUO Gang,TONG Wen-de,ZOU Quan-ming,WU Chao,LIU Kai-yun.Role of HP0318 gene for adaptive colonization of H. pylori in Mongolian gerbils[J].J Amry Med Univ (J Third Mil Med Univ),2007,29(11):1006-1009.
GUO Gang,TONG Wen-de,ZOU Quan-ming,WU Chao,LIU Kai-yun.Role of HP0318 gene for adaptive colonization of H. pylori in Mongolian gerbils[J].J Amry Med Univ (J Third Mil Med Univ),2007,29(11):1006-1009.DOI:
Objective To construct and identify a deficiency mutant of H. pylori strains without HP0318 gene. Methods Two cloning PCR fragments containing two-end regions of HP0318 and a selectable chloramphenicol resistance marker between them were engineered into pBluescript plasmid. Then the HP0318-deleted derivative plasmid was electrotransformed into adaptive strain M
13
and constructed a HP0318-negative mutant of H. pylori via homologous recombination resulting in allelic exchange. M
13
and the mutant were inoculated to Mongolian gerbils
respectively. The level of colonization and pathological change were assessed at 4 weeks after infection. Results A
n HP0318 negative mutant of H. pylori strain has been constructed successfully. The infectious rate and colonization levels of the HP0318 mutant in Mongolian gerbils were significantly lower as compared with M
13
(P0.05). Conclusion These results demonstrate the importance of HP0318 gene for adaptive colonization of H. pylori in Mongolian gerbils.