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A lipid-protein hybrid model for tight junction Lee DB; Jamgotchian N; Allen SG; Abeles MB; Ward HJAm J Physiol Renal Physiol 2008[Dec]; 295 (6): F1601-12The epithelial tight junction (TJ) was first described ultrastructurally as a fusion of the outer lipid leaflets of the adjoining cell membrane bilayers (hemifusion). The discovery of an increasing number of integral TJ and TJ-associated proteins has eclipsed the original lipid-based model with the wide acceptance of a protein-centric model for the TJ. In this review, we stress the importance of lipids in TJ structure and function. A lipid-protein hybrid model accommodates a large body of information supporting the lipidic characteristics of the TJ, harmonizes with the accumulating evidence supporting the TJ as an assembly of lipid rafts, and focuses on an important, but relatively unexplored, field of lipid-protein interactions in the morphology, physiology, and pathophysiology of the TJ.|Animals[MESH]|Cell Membrane/physiology[MESH]|Epithelial Cells/physiology[MESH]|Humans[MESH]|Lipid Bilayers[MESH]|Lipids/*physiology[MESH]|Membrane Proteins/physiology[MESH]|Micelles[MESH]|Models, Biological[MESH]|Proteins/*physiology[MESH]|Tight Junctions/*physiology[MESH] |
