Virulence genes and neutral DNA markers of Helicobacter pylori isolates from different ethnic communities of West Bengal,India |
| |
| Authors: | Datta Simanti Chattopadhyay Santanu Balakrish Nair G Mukhopadhyay Asish K Hembram Jabaranjan Berg Douglas E Rani Saha Dhira Khan Asis Santra Amal Bhattacharya S K Chowdhury Abhijit |
| |
| Affiliation: | National Institute of Cholera and Enteric Diseases, Beliaghata, Calcutta 700010, India. |
| |
| Abstract: | Virulence-associated genes and neutral DNA markers of Helicobacter pylori strains from the Santhal and Oroan ethnic minorities of West Bengal, India, were studied. These people have traditionally been quite separate from other Indians and differ culturally, genetically, and linguistically from mainstream Bengalis, whose H. pylori strains have been characterized previously. H. pylori was found in each of 49 study participants, although none had peptic ulcer disease, and was cultured from 31 of them. All strains carried the cag pathogenicity island and potentially toxigenic s1 alleles of vacuolating cytotoxin gene (vacA) and were resistant to at least 8 micro g of metronidazole per ml. DNA sequence motifs in vacA mid-region m1 alleles, cagA, and an informative insertion or deletion motif next to cagA from these strains were similar to those of strains from ethnic Bengalis. Three mobile elements, IS605, IS607, and ISHp608, were present in 29, 19, and 10%, respectively, of Santhal and Oroan strains, which is similar to their prevalence in Bengali H. pylori. Thus, there is no evidence that the gene pools of H. pylori of these ethnic minorities differ from those of Bengalis from the same region. This relatedness of strains from persons of different ethnicities bears on our understanding of H. pylori transmission between communities and genome evolution. |
| |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ |
|
