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- From: nyeda@cnsvax.uwec.edu (David Nye)
- Newsgroups: sci.med
- Subject: Re: Deprenyl
- Message-ID: <1992Nov17.202906.2411@cnsvax.uwec.edu>
- Date: 17 Nov 92 20:29:06 -0600
- References: <1992Nov16.235730.2369@cnsvax.uwec.edu> <1992Nov17.181034.13282@spdcc.com>
- Organization: University of Wisconsin Eau Claire
- Lines: 32
-
- In article <1992Nov17.181034.13282@spdcc.com>, dyer@spdcc.com (Steve Dyer) writes:
- >
- > Isn't there an ongoing study (whatitsname? DATATOP?) which is looking
- > at the efficacy of l-deprenyl (selegiline) and Vitamin E in slowing the
- > progression of the disease? I understood that intermediate analysis of
- > the data showed a modest difference in the selegiline group, but that
- > it wasn't obvious yet whether this was due to a therapeutic effect as
- > opposed to a disease-modifying effect. Gordon is probably undoubtedly
- > more up to date on this than I would ever be.
-
- Yes, the DATATOP study is ongoing, with more results to be presented in
- the near future, I understand. The trouble is that the results could
- well have represented a mild dopaminergic effect. The researchers just
- assumed that it didn't have any symptomatic effects, even though one
- would expect this (MAO-B blocade should raise levels of endogenous
- dopamine), and didn't provide a sufficient washout period.
-
- > There are a couple of issues here. _Which_ has a 1/2 life of over a
- > month? MAO-B? I'm pretty sure that selegiline is metabolized and
- > excreted much more quickly. Still, it is common even in antidepressant
-
- I meant that the effect of selegiline has a half-life of over a month
- because it is an irreversible inhibitor, and MAO-B turnover is slow.
-
- Selegiline is only one of several new medications of dubious or marginal
- worth which are likely to be promoted heavily, demanded by patients, and
- very expensive. Tacrine (sp?) for Alzheimer's is another. This raises
- some troubling ethical issues as healthcare costs continue to increase,
- particularly as regards rationing.
-
- David Nye
- nyeda@cnsvax.uwec.edu
-