Senior Member mmhce Posted August 17, 2009 Senior Member Share Posted August 17, 2009 The effects of zinc sulphate and azelaic acid on 5?±-reductase activity in human skin were studied using an in vitro assay with 1,2[3H]-testosterone as substrate. When added at concentrations of 3 or 9 mmol/1, zinc was a potent inhibitor of 5?±-reductase activity. At high concentrations, zinc could completely inhibit the enzyme activity. Azelaic acid was also a potent inhibitor of 5?±-reductase; inhibition was detectable at concentrations as low as 0.2 mmol/l and was complete at 3 mmol/l. An additive effect of the two inhibitors was observed. Vitamin B6 potentiated the inhibitory effect of zinc, but not of azelaic acid, suggesting that two different mechanisms are involved. When the three substances were added together at very low concentrations which had been shown to be ineffective alone, 90% inhibition of 5?±-reductase activity was obtained. If this inhibition is confirmed in vivo, zinc sulphate combined with azelaic acid could be an effective agent in the treatment of androgen related pathology of human skin. take care... Link to comment Share on other sites More sharing options...
Senior Member splitting hairs Posted August 17, 2009 Senior Member Share Posted August 17, 2009 Sounds interesting. But an in vitro study is on a bit of tissue in a test tube. There are far more issues regarding drug delivery and effectiveness in vivo, that is, in the human body. It still however shows potential, but I take it in vitro appication would be equivalent to applying the compounds topically? _________________________________________________ Propecia since July 2008 2201 Grafts with Dr Lorenzo on 19.10.22 - See my write up here: Link to comment Share on other sites More sharing options...
Senior Member mmhce Posted August 17, 2009 Author Senior Member Share Posted August 17, 2009 but I take it in vitro appication would be equivalent to applying the compounds topically? I should think so. take care... Link to comment Share on other sites More sharing options...
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