Mast cells at the crossroads of microbiota and IBD

The human gut harbours a wide range of microorganisms that play a fundamental role in the well‐being of their host. A dysregulation of the microbial composition can lead to the development or exacerbation of gastrointestinal disorders. Emerging evidence supports the hypothesis that mast cells (MCs) play a role in host‐microbiota communication, modulating the mutual influence between the host and its microbiota through changes in their activation state. The ability of some bacteria to specifically affect MC functions and activation has been extensively studied, with different and sometimes conflicting results, while only little is known about MC‐fungi interactions. In this review, the most recent advances in the field of MC‐bacteria and MC‐fungi interactions will be discussed, with a particular focus on the role of these interactions in the onset of gastrointestinal disorders such as inflammatory bowel diseases (IBD). Moreover, the connection between some MC‐targeting drugs and IBD were discussed, suggesting probiotics as reasonable and promising therapy in the management of IBD patients.

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