Dec
3
Stimulation of collagen synthesis by stanozolol
December 3, 2005 |
Researchers: Falanga V, Greenberg AS, Zhou L, Ochoa SM, Roberts AB, Falabella A, Yamaguchi Y; University of Miami School of Medicine, Department of Dermatology, Miami, Veterans Affairs Medical Center, Florida, USA.
Source: J Invest Dermatol 1998 Dec;111(6):1193-7
Summary: In this report, we measured the effect of the anabolic steroid stanozolol on cell replication and collagen synthesis in cultures of adult human dermal fibroblasts. Stanozolol (0.625-5 micrograms per ml) had no effect on fibroblast replication and cell viability but enhanced collagen synthesis in a dose-dependent manner. Stanozolol also increased (by 2-fold) the mRNA levels of alpha1 (I) and alpha1 (III) procollagen and, to a similar extent, upregulated transforming growth factor-beta1 (TGF-beta1) mRNA and peptide levels. There was no stimulation of collagen synthesis by testosterone. The stimulatory effects of stanozolol on collagen synthesis were blocked by a TGF-beta1 anti-sense oligonucleotide, by antibodies to TGF-beta, and in dermal fibroblast cultures derived from TGF-beta-1 knockout mice. We conclude that collagen synthesis is increased by the anabolic steroid stanozolol and that, for the most part, this effect is due to TGF-beta-1. These findings point to a novel mechanism of action of anabolic steroids.
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