Abstract:
:Cyclosporin (CsA) is widely used in the treatment of renal disease and transplantation, which are often complicated by alterations of lipid metabolism. Both chronic administration of CsA and hyperlipidaemia have been shown to evoke an early macrophage influx and have progressively led to glomerular and interstitial sclerosis. MCP-1 is the major monocyte chemoattractant secreted by stimulated mesangial cells and TGF-beta 1 is a key mediator of fibrogenesis in chronic progressive renal fibrosis. Thus, the combined effect of CsA and low-density lipoprotein (LDL) on the gene and protein expression of MCP-1 and TGF-beta 1 in cultured human mesangial cells (HMC) was explored. Both agents induced an early and persistent increase of MCP-1 and TGF-beta 1 mRNA levels and protein release. The simultaneous addition of CsA and LDL did not display any additive effect on target gene expression, but it caused a synergistic effect on MCP-1 and TGF-beta 1 protein secretion into culture medium. On the other hand, CsA and LDL had different effects on cell proliferation: the latter increased DNA synthesis, whereas CsA inhibited both spontaneous and mitogen-stimulated mesangial cell growth. The study concludes that CsA and LDL display an additive effect on TGF-beta 1 and MCP-1 synthesis and release by HMC, thus possibly co-operating to induce an early macrophage influx and the subsequent mesangial expansion and increased extracellular matrix deposition. However, in contrast they seem to modulate HMC proliferation differently, which is a further critical event intimately involved in the development of glomerulosclerosis.
journal_name
Clin Exp Immunoljournal_title
Clinical and experimental immunologyauthors
Di Paolo S,Grandaliano G,Gesualdo L,Ranieri E,Schena FPdoi
10.1046/j.1365-2249.1999.00965.xsubject
Has Abstractpub_date
1999-08-01 00:00:00pages
355-60issue
2eissn
0009-9104issn
1365-2249pii
cei965journal_volume
117pub_type
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