Journal
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
Volume 13, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fcimb.2023.1116335
Keywords
Chlamydia trachomatis; GSDMD; pyroptosis; macrophage; caspase-1; caspase-11
Categories
Ask authors/readers for more resources
We found that C. trachomatis L2 infection induced pyroptosis in mouse macrophages, which was accompanied by activation of caspase-1 and caspase-11 as well as gasdermin D (GSDMD) activation. Inhibition of these inflammatory caspases suppressed GSDMD activation. Importantly, the pyroptosis response significantly inhibited the intracellular growth of C. trachomatis, suggesting it can be utilized as an intrinsic mechanism to restrict C. trachomatis infection.
Pyroptosis, a type of programmed necrosis associated with inflammatory, is a host defense mechanism against microbial infections. Although Chlamydia has been shown to induce pyroptosis, whether pyroptosis directly impacts the growth of Chlamydia has not been demonstrated. In this study, we found that C. trachomatis L2 infection of the mouse macrophage RAW 264.7 cells induced pyroptosis by monitoring the ultrastructural changes under transmission electron microscopy and the release of LDH and IL-1 beta. More importantly, this C. trachomatis-triggered pyroptosis with activation of caspase-1 and caspase-11 was also accompanied by gasdermin D (GSDMD) activation. Suppression of these two inflammatory caspases inhibited GSDMD activation. Interestingly, the C. trachomatis-triggered pyroptosis significantly inhibited the intracellular growth of C. trachomatis since inactivation of either GSDMD or caspase-1/11 significantly rescued infectious C. trachomatis yields, which suggests pyroptosis response can be utilized as an intrinsic mechanism to restrict C. trachomatis intracellular infection in addition to the well- documented extrinsic mechanisms by recruiting and enhancing inflammatory responses. This study may reveal novel targets for attenuating C. trachomatis infectivity and/or pathogenicity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available