Effect of prostaglandin E2 and hyaluronan on mesangial cell proliferation. A potential contribution to glomerular hypercellularity in diabetes.
Proliferation of mesangial cells is a feature of several forms of human and experimental glomerulopathy, including that seen in diabetes. The nonsulfated glycosaminoglycan hyaluronan participates in the regulation of pericellular matrix assembly and is a mitogen in some cell types. We have shown previously that hyaluronan production is increased in the glomerulus in a glucose- and prostaglandin-dependent manner. We have investigated the effect of diabetes and of addition of hyaluronan and prostaglandin E2 (PGE2) on the uptake of [3H]thymidine by glomerular core preparations enriched in mesangial cells. When compared with nondiabetic controls, it was shown that [3H]thymidine uptake was significantly increased in glomerular core preparations from streptozotocin-induced diabetic rats (to 169 +/- 5%, P < 0.001). In glomerular cores from both experimental groups, hyaluronan (50-250 ng/ml) or PGE2 (10(-12) to 10(-8) mol/l) increased the uptake of [3H]thymidine. Further, mesangial cells from nondiabetic control glomerular cores, when maintained in culture in early passage, responded with increased [3H]thymidine uptake to raised glucose (5.6-25 mmol/l) and to added hyaluronan and PGE2. We propose that prostaglandin and hyaluronan production in response to a raised glucose environment in diabetes can contribute to mesangial hypercellularity.
Mahadevan
P
P
Department of Medicine, University of Melbourne, Royal Melbourne Hospital, Parkville, Victoria, Australia.
Larkins
R G
RG
Fraser
J R
JR
Dunlop
M E
ME
D000818:Animals; D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured; D016861:Cyclooxygenase Inhibitors / Q000494:pharmacology; D004247:DNA / Q000096:biosynthesis; D004261:DNA Replication / Q000187:drug effects; D003921:Diabetes Mellitus, Experimental / Q000378:metabolism* / Q000473:pathology; D015232:Dinoprostone / Q000494:pharmacology*; D005920:Glomerular Mesangium / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology; D005947:Glucose / Q000494:pharmacology; D006820:Hyaluronic Acid / Q000494:pharmacology*; D006984:Hypertrophy; D007213:Indomethacin / Q000494:pharmacology; D007678:Kidney Glomerulus / Q000378:metabolism / Q000473:pathology; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D013311:Streptozocin; D013936:Thymidine / Q000378:metabolism
D016861:Cyclooxygenase Inhibitors; D013311:Streptozocin; D006820:Hyaluronic Acid; D004247:DNA; D005947:Glucose; D015232:Dinoprostone; D013936:Thymidine; D007213:Indomethacin