Biocatalytic synthesis of 4-pregnen-20,21-diol-3-one, a selective inhibitor of human 5α-reductase type II
作者:Frank Hannemann、Rita Bernhardt、Joachim Jose
DOI:10.1080/14756360701425311
日期:2007.1
Biocatalysis, the conversion of substrates into valuable products by the use of enzymes, has some striking advantages in comparison to standard organic chemistry for drug synthesis. By biocatalysis, substrates that contain several identical reactive groups at different positions can be converted with high regio-selectivity and enantio-selectivity. In this study, an E. coli isolate (E132) was identified which was able to convert the steroid desoxycorticosterone into the product 4-pregnen-20,21-diol-3-one in real terms. The product was purified from the cell culture supernatant by HPLC and its structure was demonstrated by mass spectrometry and NMR spectroscopy. It was tested on inhibition of human 5 alpha-reductases type I and type II. At a concentration of 10 mu M, inhibition was 49.0% for type I and 81.8% for type II, whereas there was no inhibition of human aromatase (CYP19) at 20 mM and human 17 alpha-hydroxylase-C-17,C-20- lyase (CYP17) at 2.5 mu M detectable. The IC50 value of 4-pregnen-20,21-diol-3-one for human 5 alpha-reductase type II was determined to be 1.56 mu M.
COMPOSITIONS FOR PROLIFERATION OF CELLS AND RELATED METHODS
申请人:The Hospital For Sick Children
公开号:EP2598150A2
公开(公告)日:2013-06-05
US8748177B2
申请人:——
公开号:US8748177B2
公开(公告)日:2014-06-10
[EN] COMPOSITIONS FOR PROLIFERATION OF CELLS AND RELATED METHODS<br/>[FR] COMPOSITIONS POUR LA PROLIFÉRATION DE CELLULES ET PROCÉDÉS ASSOCIÉS
申请人:HOSPITAL FOR SICK CHILDREN
公开号:WO2010039679A1
公开(公告)日:2010-04-08
We have discovered that p63 inhibition results in increased cellular proliferation. We have also performed a screen for agents capable of increasing cellular proliferation, (e.g., of stem cells such as skin-derived precursors (SKPs)). The invention therefore invention provides compositions, methods, and kits for increasing proliferation of cells, using compounds that decrease p63 expression or activity or using the compounds described herein. The invention also features methods of using these compounds for increasing hair growth, improving skin health, or promoting skin repair in a subject.