Focal adhesion kinase: A promising regulator of colitis-associated healing

Although the etiology of inflammatory bowel disease (IBD) remains unclear, compromised epithelial barrier integrity is believed to promote susceptibility to IBD and be associated with disease severity, suggesting that improving gut barrier integrity may palliate or treat IBD. Such a notion gets support from the clinical findings that mucosal healing in IBD patients is associated with improved prognosis, and reduced risk of relapse or colitis-associated cancer. It therefore becomes critical to understand the intracellular signals that regulate mucosal healing and gut barrier integrity. Focal adhesion kinase (FAK) is a non-receptor tyrosine kinase that critically modulates epithelial cell growth and mobility and has been associated with carcinogenesis. However, studies also suggest that FAK activation may promote mucosal healing under conditions of colitis, which should reduce the risk of colitis-associated cancer. These findings highlight a potentially transformative role for FAK in the context of IBD. Understanding the molecular mechanisms by which FAK influences gut barrier repair and mucosal integrity could offer novel therapeutic avenues for treating IBD and preventing its long-term complications. This review focuses on the potential role of FAK in promoting colitis-associated mucosal healing and the underlying molecular mechanisms driving these processes, offering critical insights into IBD pathogenesis and therapy.