Comparative study between Helicobacter pylori and host human genetics in the Dominican Republic

BMC Evolutionary Biology

Phawinee Subsomwong¹  Hiroyuki Nagashima¹  Seiji Shiota¹  Yoshio Yamaoka¹  Takaaki Ono¹  Rumiko Suzuki¹  José A. Jiménez Abreu²  Celso Hosking³  Modesto Cruz³ 

[1] Department of Environmental and Preventive Medicine, Faculty of Medicine, Oita University;Dominican-Japanese Digestive Disease Center, Dr Luis E. Aybar Health and Hygiene City;Institute of Microbiology and Parasitology, Faculty of Science, Autonomous University of Santo Domingo;

关键词: Helicobacter pylori;    Population structure;    Dominican Republic;    Phylogeography;    Genetic diversity;    Human mitochondrial DNA;   

DOI  :  10.1186/s12862-019-1526-9

来源: DOAJ

【 摘 要 】

Abstract Background Helicobacter pylori, a bacterium that infects the human stomach, has high genetic diversity. Because its evolution is parallel to human, H. pylori is used as a tool to trace human migration. However, there are few studies about the relationship between phylogeography of H. pylori and its host human. Methods We examined both H. pylori DNA and the host mitochondrial DNA and Y-chromosome DNA obtained from a total 119 patients in the Dominican Republic, where human demography consists of various ancestries. DNA extracted from cultured H. pylori were analyzed by multi locus sequence typing. Mitochondrial DNA and Y-chromosome DNA were evaluated by haplogroup analyses. Results H. pylori strains were divided into 2 populations; 68 strains with African group (hpAfrica1) and 51 strains with European group (hpEurope). In Y-chromosomal haplogroup, European origin was dominant, whereas African origin was dominant both in H. pylori and in mtDNA haplogroup. These results supported the hypothesis that mother-to-child infection is predominant in H. pylori infection. The Amerindian type of mtDNA haplogroup was observed in 11.8% of the patients; however, Amerindian type (hspAmerind) of H. pylori was not observed. Although subpopulation type of most hpAfrica1 strains in Central America and South America were hybrid (hspWAfrica/hpEurope), most Dominican Republic hpAfrica1 strains were similar to those of African continent. Conclusions Genetic features of H. pylori, mtDNA, and Y haplogroups reflect the history of colonial migration and slave trade in the Dominican Republic. Discrepancy between H. pylori and the host human genotypes support the hypothesis that adaptability of hspAmerind H. pylori strains are weaker than hpEurope strains. H. pylori strains in the Dominican Republic seem to contain larger proportion of African ancestry compared to other American continent strains.

【 授权许可】

Unknown