Microbiota of MR1 deficient mice confer resistance against Clostridium difficile infection
This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication. Clostridium difficile (Cd) infection (CDI) typically occurs after antibiotic usage perturbs the gut microbiota. Mucosa-associated invariant T cells (MAIT) are found in the gut and their development is dependent on Major histocompatibility complex-related protein 1 (MR1) and the host microbiome. Here we were interested in determining whether the absence of MR1 impacts resistance to CDI. To this end, wild-type (WT) and MR1-/- mice were treated with antibiotics and then infected with Cd spores. Surprisingly, MR1-/- mice exhibited resistance to Cd colonization. 16S rRNA gene sequencing of feces revealed inherent differences in microbial composition. This colonization resistance was transferred from MR1-/- to WT mice via fecal microbiota transplantation, suggesting that MR1-dependent factors influence the microbiota, leading to CDI susceptibility.
Smith, A., Foss, E., Zhang, I., Hastie, J., Giordano, N., Gasparyan, L., VinhNguyen, L., Schubert, A., Prasad, D., McMichael, H., Sun, J., Beger, R., Simonyan, V., Cowley, S., & Carlson, P. (2019). Microbiota of MR1 deficient mice confer resistance against Clostridium difficile infection. PLoS ONE, 14 (9). http://dx.doi.org/10.1371/journal.pone.0223025