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Endothelial glycocalyx and the peritoneal barrier Flessner MFPerit Dial Int 2008[Jan]; 28 (1): 6-12Recent advances in the study of the microcirculation have demonstrated the critical role of the endothelial glycocalyx in transcapillary transport from the plasma to the tissue interstitium. Since the capillary wall represents the initial resistance to solute transfer from the plasma through the tissue to the dialysate, the glycocalyx is potentially of major importance to peritoneal dialysis. Inadvertently removed in early histological studies, this thin, delicate layer of glycosaminoglycans and proteoglycans is now recognized as a primary barrier in transendothelial solute and water transport. Subperitoneal endothelia are exposed to inflammation, angiogenesis, and hyperglycemia, which have been shown to affect the layer by increasing permeability. This entity permits new hypotheses concerning the factors that influence the transport characteristics of peritoneal dialysis patients and provides new avenues of basic research into the fundamental mechanisms of alteration of the peritoneal barrier.|*Peritoneal Dialysis[MESH]|Animals[MESH]|Ascitic Fluid/*physiology[MESH]|Cell Membrane Permeability[MESH]|Endothelium, Vascular/*ultrastructure[MESH]|Glycocalyx/*metabolism[MESH]|Humans[MESH]|Models, Biological[MESH]|Peritoneum/*metabolism/*ultrastructure[MESH] |
