title: FK506, transforming growth factor-beta1 and mesangial matrix synthesis: parallels and differences compared with cyclosporine A.
abstract: Cyclosporine A (CsA)-induced glomerulosclerosis is a well-described side effect of CsA treatment. Current evidence indicates that FK506 causes similar morphologic changes. Recently, we demonstrated that CsA up-regulates the expression of transforming growth factor-beta1 (TGF-beta1), its receptors type I (TbetaR-I) and type II (TbetaR-II), as well as related matrix protein synthesis in mesangial cells (MCs). Here, we assessed the effect of FK506 on the expression of TGF-beta1, TbetaR-I, TbetaR-II, fibronectin (FN) and plasminogen activator inhibitor type-1 (PAI-1) in MCs. Resting MCs were incubated with/without FK506. Time- and concentration-dependent expression was measured at the mRNA and protein level. Compared to untreated controls, FK506 stimulated TGF-beta1 mRNA (maximum at 8 h, 100 ng/mL: 2.13+/-0.15-fold, P<0.005) and protein expression (maximum at 96 h, 100 ng/mL: 1.96+/-0.29-fold, P<0.005). In contrast, TbetaR-I and TbetaR-II protein expression remained unchanged. Concerning matrix protein synthesis, FK506 slightly increased FN production (96 h, 100 ng/mL: 1.38+/-0.28-fold, P<0.05), but not PAI-1 production. These results indicate that, comparable to CsA, FK506 induced glomerulosclerosis is also due to a direct effect on mesangial matrix production, which is at least in part mediated via up-regulation of TGF-beta1 expression. The fact that, unlike CsA, FK506 does not increase the expression of TbetaR-I, TbetaR-II, and PAI-1, deserves further investigation.
authors.affiliation: Department of Internal Medicine-Nephrology, University Hospital Charité, Campus Mitte, Schumannstrasse 20/21, 10117 Berlin, Germany. johannes.waiser@charite.de
authors.forename: Johannes
authors.initials: J
authors.lastname: Waiser
authors.forename: Kerstin
authors.initials: K
authors.lastname: Dell
authors.forename: Jan
authors.initials: J
authors.lastname: Kreutzkamp
authors.forename: Torsten
authors.initials: T
authors.lastname: Böhler
authors.forename: Klemens
authors.initials: K
authors.lastname: Budde
authors.forename: Harm
authors.initials: H
authors.lastname: Peters
authors.forename: Hans-Hellmut
authors.initials: HH
authors.lastname: Neumayer
mesh_terms: D030201:Activin Receptors, Type I / Q000096:biosynthesis; D000818:Animals; D002478:Cells, Cultured; D016572:Cyclosporine / Q000494:pharmacology*; D004797:Enzyme-Linked Immunosorbent Assay; D005353:Fibronectins / Q000096:biosynthesis; D005786:Gene Expression Regulation / Q000187:drug effects; D005920:Glomerular Mesangium / Q000187:drug effects* / Q000378:metabolism*; D010958:Plasminogen / Q000378:metabolism; D017395:Plasminogen Activator Inhibitor 1 / Q000096:biosynthesis; D017346:Protein Serine-Threonine Kinases; D051381:Rats; D000077293:Receptor, Transforming Growth Factor-beta Type I; D000077294:Receptor, Transforming Growth Factor-beta Type II; D018125:Receptors, Transforming Growth Factor beta / Q000096:biosynthesis; D016559:Tacrolimus / Q000494:pharmacology*; D053773:Transforming Growth Factor beta1 / Q000096:biosynthesis* / Q000378:metabolism
chemical_list: D005353:Fibronectins; D017395:Plasminogen Activator Inhibitor 1; D018125:Receptors, Transforming Growth Factor beta; D053773:Transforming Growth Factor beta1; D016572:Cyclosporine; D010958:Plasminogen; D017346:Protein Serine-Threonine Kinases; D030201:Activin Receptors, Type I; D000077293:Receptor, Transforming Growth Factor-beta Type I; D000077294:Receptor, Transforming Growth Factor-beta Type II; C000625843:Tgfbr1 protein, rat; D016559:Tacrolimus