Helicobacter pylori, the most common etiologic agent of gastric diseases including gastric cancer, is auxotrophic for cholesterol and has to hijack it from gastric epithelia. Upon uptake, the bacteria convert cholesterol to cholesteryl 6'-O-acyl-α-D-glucopyranoside (CAG) to promote lipid raft clustering in the host cell membranes. However, how CAG appears in the host to exert the pathogenesis still remains ambiguous. Herein we identified hp0499 to be the gene of cholesteryl α-D-glucopyranoside acyltransferase (CGAT). Together with cholesteryl glucosyltransferase (catalyzing the prior step), CGAT is secreted via outer membrane vesicles to the host cells for direct synthesis of CAG. This significantly enhances lipid rafts clustering, gathers adhesion molecules (including Lewis antigens and integrins α5, β1), and promotes more bacterial adhesion. Furthermore, the clinically used drug amiodarone was shown as a potent inhibitor of CGAT to effectively reduce the bacterial adhesion, indicating that CGAT is a potential target of therapeutic intervention.
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http://dx.doi.org/10.1038/s42003-020-0855-y | DOI Listing |
Helicobacter
January 2025
Department of Public Health, University of Otago, Wellington, South, New Zealand.
Background: As seen globally, there are up to sixfold differences in gastric cancer mortality by ethnicity in Aotearoa New Zealand, and H. pylori is the major modifiable risk factor. This study investigates whether current H.
View Article and Find Full Text PDFJ Cancer Prev
December 2024
Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
Serological tests for needs local validation as the diagnostic accuracy may vary depending on the prevalence of . . This study examined the diagnostic performance of two ELISA, GastroPanel (GastroPanel ELISA; Biohit Oyj) and GENEDIA (GENEDIA .
View Article and Find Full Text PDFCancer Prev Res (Phila)
January 2025
West Virginia University, Morgantown, United States.
Gastric cancer is the fifth most common cancer and the fifth leading cause of cancer deaths worldwide. Chronic infection by the bacterium Helicobacter pylori is the most prominent gastric cancer risk factor, but only 1-3% of infected individuals will develop gastric cancer. Cigarette smoking is another independent gastric cancer risk factor, and H.
View Article and Find Full Text PDFSci Rep
January 2025
Department of Gastroenterology, Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou Medical Center, Nanjing Medical University, 68 Gehu Middle Road, Wujing District, Changzhou, 213000, Jiangsu, China.
Patients with diabetes have a high risk of failure of H. pylori eradication therapy. The present study aims to evaluate the efficacy and safety of vonoprazan-amoxicillin (VA) dual therapy for the treatment of H.
View Article and Find Full Text PDFAgeing Res Rev
January 2025
Center for Global Health Research, Saveetha Medical College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India; Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, The Islamic Republic of Iran; Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, The Islamic Republic of Iran. Electronic address:
Cellular senescence, a complex biological process resulting in permanent cell-cycle arrest, is central to aging and age-related diseases. A key concept in understanding cellular senescence is the Hayflick Limit, which refers to the limited capacity of normal human cells to divide, after which they become senescent. Senescent cells (SC) accumulate with age, releasing pro-inflammatory and tissue-remodeling factors collectively known as the senescence-associated secretory phenotype (SASP).
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