miR-125a-5p regulates the sialyltransferase ST3GAL1 in murine model of human intestinal campylobacteriosis

Gut Pathogens

Research

Thomas Alter¹  Greta Gölz¹  Markus M. Heimesaat²  Soraya Mousavi²  Stefan Bereswill²  Ralf Einspanier³  Soroush Sharbati³  Angelina Kraski³ 

[1] Institute of Food Safety and Food Hygiene, Freie Universität Berlin, Berlin, Germany;Institute of Microbiology, Infectious Diseases and Immunology, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Berlin, Germany;Institute of Veterinary Biochemistry, Freie Universität Berlin, Berlin, Germany;

关键词: Campylobacter jejuni;    O;    microRNA;    Mucin;    Infection;    Colonisation;   

DOI  :  10.1186/s13099-023-00577-6

 received in 2023-07-10, accepted in 2023-10-08,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundZoonotic microorganisms are increasingly impacting human health worldwide. Due to the development of the global population, humans and animals live in shared and progressively crowded ecosystems, which enhances the risk of zoonoses. Although Campylobacter species are among the most important bacterial zoonotic agents worldwide, the molecular mechanisms of many host and pathogen factors involved in colonisation and infection are poorly understood. Campylobacter jejuni colonises the crypts of the human colon and causes acute inflammatory processes. The mucus and associated proteins play a central host-protective role in this process. The aim of this study was to explore the regulation of specific glycosyltransferase genes relevant to differential mucin-type O-glycosylation that could influence host colonisation and infection by C. jejuni.ResultsSince microRNAs are known to be important regulators of the mammalian host cell response to bacterial infections, we focussed on the role of miR-125a-5p in C. jejuni infection. Combining in vitro and in vivo approaches, we show that miR-125a-5p regulates the expression of the sialyltransferase ST3GAL1 in an infection-dependent manner. The protein ST3GAL1 shows markedly increased intestinal levels in infected mice, with enhanced distribution in the mucosal epithelial layer in contrast to naïve mice.ConclusionFrom our previous studies and the data presented here, we conclude that miR-125a-5p and the previously reported miR-615-3p are involved in regulating the glycosylation patterns of relevant host cell response proteins during C. jejuni infection. The miRNA-dependent modulation of mucin-type O-glycosylation could be part of the mucosal immune response, but also a pathogen-driven modification that allows colonisation and infection of the mammalian host.

【 授权许可】

CC BY   
© BioMed Central Ltd., part of Springer Nature 2023

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