Abstract
Intestinal epithelial tight junction disruption is a primary contributing factor in alcohol-associated endotoxemia, systemic inflammation, and multiple organ damage. Ethanol and acetaldehyde disrupt tight junctions by elevating intracellular Ca2+. Here we identify TRPV6, a Ca2+-permeable channel, as a target to improve alcohol-induced intestinal barrier dysfunction and systemic inflammation. Ethanol and acetaldehyde elicit TRPV6 ionic currents in Caco-2 cells. Studies in Caco-2 cell monolayers and mouse intestinal organoids show that TRPV6 deficiency or inhibition attenuates ethanol and acetaldehyde-induced Ca2+ influx, tight junction disruption, and barrier dysfunction. Moreover, Trpv6-/- mice are resistant to alcohol-induced intestinal barrier dysfunction. Photoaffinity labeling of 3-Azibutanol identifies a conserved histidine as a potential alcohol-binding site in TRPV6, and its substitution for alanine in rat TRPV6 reduces ethanol-activated TRPV6 currents. Our findings reveal that TRPV6 is required for alcohol-induced gut barrier dysfunction and inflammation. Thus, molecules that decrease TRPV6 function have the potential to attenuate alcohol-associated endotoxemia and systemic inflammation.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
