期刊
CELLULAR AND MOLECULAR GASTROENTEROLOGY AND HEPATOLOGY
卷 10, 期 2, 页码 327-340出版社
ELSEVIER INC
DOI: 10.1016/j.jcmgh.2020.04.001
关键词
Intestinal Permeability; Barrier; Myosin Light Chain Kinase; Enteric Infection; Inflammatory Bowel Disease; Graft-Versus-Host Disease; Pore Pathway; Leak Pathway; Claudin
资金
- NIH [R01DK61931, R01DK68271, R24DK099803]
- Harvard Digestive Disease Center [P30DK034854]
- Department of Defense [CDMRP PR181271]
- National Natural Science Foundation of China [81800464]
Defective epithelial barrier function is present in maladies including epidermal burn injury, environmental lung damage, renal tubular disease, and a range of immune-mediated and infectious intestinal disorders. When the epithelial surface is intact, the paracellular pathway be-tween cells is sealed by the tight junction. However, permeability of tight junctions varies widely across tissues and can be markedly impacted by disease. For example, tight junctions within the skin and urinary bladder are largely impermeant and their permeability is not regulated. In contrast, tight junctions of the proximal renal tubule and intestine are selectively permeable to water and solutes on the basis of their biophysical characteristics and, in the gut, can be regulated by the immune system with remarkable specificity. Conversely, modulation of tight junction barrier conductance, especially within the gastrointestinal tract, can impact immune homeostasis and diverse pathologies. Thus, tight junctions are both effectors and targets of immune regulation. Using the gastrointestinal tract as an example, this review explores current understanding of this complex interplay between tight junctions and immunity.
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