4.6 Article

Mitochondrial DNA Haplogroup Related to the Prevalence of Helicobacter pylori

期刊

CELLS
卷 10, 期 9, 页码 -

出版社

MDPI
DOI: 10.3390/cells10092482

关键词

Helicobacter pylori; mitochondrial genome; mutation; haplogroup; susceptibility

资金

  1. National Research Foundation of Korea (NRF) [NRF-2018R1D1A1B07047581, 2019M3A9H1103582, 2020M3A9E4036527]
  2. National Research Foundation of Korea [2019M3A9H1103582, 2020M3A9E4036527] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

向作者/读者索取更多资源

The study revealed that different mitochondrial haplogroups may be associated with Helicobacter pylori infection and gastric disease, with individuals carrying specific haplogroups showing higher apoptotic rates and impaired mitochondrial function following infection. Mitochondrial DNA mutations were also found to accumulate more in the H. pylori-positive population, with a higher percentage of mutations in RNA genes or nonsynonymous protein-coding regions compared to the H. pylori-negative population.
Mitochondria are essential organelles that are not only responsible for energy production but are also involved in cell metabolism, calcium homeostasis, and apoptosis. Targeting mitochondria is a key strategy for bacteria to subvert host cells' physiology and promote infection. Helicobacter (H.) pylori targets mitochondria directly. However, mitochondrial genome (mtDNA) polymorphism (haplogroup) is not yet considered an important factor for H. pylori infection. Here, we clarified the association of mitochondrial haplogroups with H. pylori prevalence and the ability to perform damage. Seven mtDNA haplogroups were identified among 28 H. pylori-positive subjects. Haplogroup B was present at a higher frequency and haplotype D at a lower one in the H. pylori population than in that of the H. pylori-negative one. The fibroblasts carrying high-frequency haplogroup displayed a higher apoptotic rate and diminished mitochondrial respiration following H. pylori infection. mtDNA mutations were accumulated more in the H. pylori-positive population than in that of the H. pylori-negative one in old age. Among the mutations, 57% were located in RNA genes or nonsynonymous protein-coding regions in the H. pylori-positive population, while 35% were in the H. pylori-negative one. We concluded that gastric disease caused by Helicobacter virulence could be associated with haplogroups and mtDNA mutations.

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