Re: DHEA-S refs./PCOS defn.

From: Jeffrey W. Clemens (clemens@duq.edu)
Mon Apr 23 08:11:52 2001


Betsy,

Thanks for the article. I believe the flow diagram SUGGESTS how insulin could alter steroid biosynthesis. My very quick read of this and the literature is that there are a lot of proposed mechanisms, but the molecular evidence for any one of them is not there yet. Of course, confounding all of these studies is the distinct possibility that this is a polygenic disorder and doing the "traditional" genetics approach is not going to find the multiple targets. Insulin certainly does have effects on steroidogenic enzyme expression in vitro and metformin is effective, but my question still remains unanswered.

> At 8:52 AM 4/20/01, Jeffrey W. Clemens wrote:
>>
>> Poll part two- So metformin seems to work. Any real evidence of what it
>> does? At the level of the granulosa cell and/or thecal cell, what is it
>> doing? What gene's expression pattern/activity is being modified when you
>> get increased insulin/IGF signaling?
>
> you might want to look at the following article
>
> http://www.womenshealthpc.com/1_00/pdf/55PCOS.pdf
>
> There is a quite nice discussion/flow diagram which explains how increased
> insulin causes alterations in steroid biosynthesis.
>
> Betsy Hyde CNM
> Branford, CT
>

--
Jeffrey W. Clemens, Ph.D.
Assistant Professor, Biological Sciences
Duquesne University
Pittsburgh, PA 15282
412-396-4597
fax-5907
http://www.home.cc.duq.edu/~clemens/




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