Selective estrogen receptor modulators suppress mesangial cell collagen synthesis.
Estrogen receptor modulators (SERMs) are "designer drugs" that exert estrogen-like actions in some cells but not in others. We examined the effects of the SERMs LY-117018 (an analog of raloxifene) and tamoxifen on mesangial cells synthesis of type I and type IV collagen. We found that LY-117018 and tamoxifen suppressed mesangial cell type IV collagen gene transcription and type IV collagen protein synthesis in a dose-dependent manner, with a potency identical to that of estradiol. Type I collagen synthesis was also suppressed by LY-117018 in a dose-dependent manner with a potency identical to that of estradiol but greater than that of tamoxifen. Genistein, which selectively binds to estrogen receptor-beta in nanomolar concentrations, suppressed type I and type IV collagen synthesis, suggesting that estrogen receptor-beta mediates the effects of estrogen on collagen synthesis. Because matrix accumulation is central to the development of glomerulosclerosis, second-generation SERMs may prove clinically useful in ameliorating progressive renal disease without the adverse effects of estrogen on reproductive tissues.
Nephrology Division, Department of Medicine, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, New York 10467, USA.
J
J
Neugarten
A
A
Acharya
J
J
Lei
S
S
Silbiger
D000804:Angiotensin II / Q000494:pharmacology; D000818:Animals; D002461:Cell Line, Transformed; D003094:Collagen / Q000037:antagonists & inhibitors* / Q000096:biosynthesis; D019332:Endothelin-1 / Q000494:pharmacology; D047629:Estrogen Receptor beta; D004967:Estrogens / Q000494:pharmacology; D005920:Glomerular Mesangium / Q000166:cytology / Q000378:metabolism*; D051379:Mice; D008815:Mice, Inbred Strains; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism; D011759:Pyrrolidines / Q000494:pharmacology*; D011960:Receptors, Estrogen / Q000378:metabolism / Q000502:physiology; D020845:Selective Estrogen Receptor Modulators / Q000494:pharmacology*; D013629:Tamoxifen / Q000494:pharmacology*; D013876:Thiophenes / Q000494:pharmacology*; D018808:Transcription Factor AP-1 / Q000378:metabolism; D014158:Transcription, Genetic / Q000187:drug effects; D016212:Transforming Growth Factor beta / Q000494:pharmacology; D015854:Up-Regulation
D019332:Endothelin-1; D047629:Estrogen Receptor beta; D004967:Estrogens; D011759:Pyrrolidines; D011960:Receptors, Estrogen; D020845:Selective Estrogen Receptor Modulators; D013876:Thiophenes; D018808:Transcription Factor AP-1; D016212:Transforming Growth Factor beta; D013629:Tamoxifen; D000804:Angiotensin II; C025430:LY 117018; D003094:Collagen; D020928:Mitogen-Activated Protein Kinases