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The present study was performed to investigate whether hydrogen sulfide (H<jats:sub>2<\/jats:sub>S) was involved in high choline\u2010induced cardiac dysfunction and explore the potential mechanisms. We found that ejection fraction (EF) and fractional shortening (FS), the indicators of cardiac function measured by echocardiography, were significantly decreased in mice fed a diet containing 1.3% choline for 4 months as compared to the control, while applying 3,3\u2010dimethyl\u20101\u2010butanol (DMB) to suppress trimethylamine N\u2010oxide (TMAO, a metabolite of choline) generation ameliorated the cardiac function. Subsequently, we found that feeding choline or TMAO significantly increased the protein levels of cyclic GMP\u2010AMP (cGAMP) synthase (cGAS), stimulator of interferon genes (STING), NOD\u2010like receptor protein 3 (NLRP3), caspase\u20101, and interleukin\u20101<jats:italic>\u03b2<\/jats:italic> (IL\u20101<jats:italic>\u03b2<\/jats:italic>) as compared to the control, which indicated the activation of cGAS\u2010STING\u2010NLRP3 inflammasome axis. Moreover, the protein expression of cystathionine <jats:italic>\u03b3<\/jats:italic>\u2010lyase (CSE), the main enzyme for H<jats:sub>2<\/jats:sub>S production in the cardiovascular system, was significantly increased after dietary supplementation with choline, but the plasma H<jats:sub>2<\/jats:sub>S levels were significantly decreased. To observe the effect of endogenous H<jats:sub>2<\/jats:sub>S, CSE knockout (KO) mice were used, and we found that the EF, FS, and plasma H<jats:sub>2<\/jats:sub>S levels in WT mice were significantly decreased after dietary supplementation with choline, while there was no difference between CSE KO\u2009+\u2009control and CSE KO\u2009+\u2009choline group. To observe the effect of exogenous H<jats:sub>2<\/jats:sub>S, mice were intraperitoneally injected with sodium hydrosulfide (NaHS, a H<jats:sub>2<\/jats:sub>S donor) for 4 months, and we found that NaHS improved the cardiac function and reduced the protein levels of cGAS, STING, NLRP3, caspase\u20101, and IL\u20101<jats:italic>\u03b2<\/jats:italic> in mice receiving dietary choline. In conclusion, our studies revealed that high choline diet decreased plasma H<jats:sub>2<\/jats:sub>S levels and induced cardiac dysfunction via cGAS\u2010STING\u2010NLRP3 inflammasome axis while H<jats:sub>2<\/jats:sub>S treatment could restore the cardiac function by inhibiting cGAS\u2010STING\u2010NLRP3 inflammasome axis.<\/jats:p>","DOI":"10.1155\/2022\/1392896","type":"journal-article","created":{"date-parts":[[2022,7,22]],"date-time":"2022-07-22T23:20:05Z","timestamp":1658532005000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Hydrogen Sulfide Ameliorated High Choline\u2010Induced Cardiac Dysfunction by Inhibiting cGAS\u2010STING\u2010NLRP3 Inflammasome 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