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- W18337245 abstract "The tight junctions are narrow belts that circumferentially surround the upper part of the lateral surfaces of the adjacent epithelial cells to create fusion points or kisses. They are involved in maintaining the cellular polarity and in the establishment of compositionally distinct fluid compartments in the body. Tight junctions are formed by many specific proteins and are connected with the cytoskeleton. In contrast to what might be expected, the intestinal tight junctions are highly dynamic areas and their permeability can change in response to both external and intracellular stimuli. In fact, the tight junctions play an important role in the regulation of the passive transepithelial movement of molecules. A number of signalling molecules have been implicated in the regulation of tight junction function, including Ca++, protein kinase C, G proteins, phospholipase A2 and C. In many intestinal and systemic diseases, changes in intestinal permeability are related to alteration of tight junctions as an expression of intestinal barrier damage. Moreover, permeability of the tight junctions can be modified by bacterial toxins, cytokines, hormones and drugs. A better understanding of tight junction structure, biogenesis and regulation mechanisms should throw further light on the intestinal barrier functions and suggest innovative therapeutic strategies." @default.
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- W18337245 date "1999-11-27" @default.
- W18337245 modified "2023-10-03" @default.
- W18337245 title "Structure and function of tight junctions. Role in intestinal barrier." @default.
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