What is AI again?
: Mol Cell Endocrinol. 2003 May 30;203(1-2):13-23. Links
Evidence that dehydroepiandrosterone, DHEA, directly inhibits GnRH gene expression in GT1-7 hypothalamic neurons.Cui H, Lin SY, Belsham DD.
Department of Physiology, Toronto General Hospital Research Institute, University Health Network, University of Toronto, Medical Sciences Building 3247A, 1 King's College Circle, Toronto, ON, Canada M5S 1A8.
Dehydroepiandrosterone (DHEA) has been reported to have diverse effects on overall physiology, although its mechanism of action and specific receptor are not yet known. We have used the immortalized, clonal GT1-7 hypothalamic neurons to study DHEA effects on gonadotropin-releasing hormone (GnRH) gene expression. DHEA (10(-4) M) downregulates GnRH transcription by 39, 70 and 83% at 24, 36, and 48 h, respectively, while DHEA-sulphate had no effect. Hydroxyflutamide a specific androgen receptor (AR) antagonist, and cyproterone acetate or trilostane, both inhibitors of 3 beta-hydroxysteroid dehydrogenase/delta 4,5 isomerase, the rate-limiting enzyme for the conversion of DHEA to sex steroids, did not affect the ability of DHEA to downregulate GnRH gene expression. We found that GT1-7 cells did not express aromatase, thereby precluding conversion to estrogen. Analysis of [(14)C] DHEA metabolism by thin layer chromatography indicates that the main metabolites produced are 7 alpha- and 7 beta-hydroxy DHEA, and 7-oxo DHEA, although these steroids were not able to repress GnRH gene expression alone. Cell viability studies indicated that the transcriptional repression observed is not due to GT1-7 cell death. Interestingly, SV40 T-antigen mRNA levels, under the control of 2.3 kb of the rat GnRH gene 5' regulatory region, are also repressed by DHEA. Our studies indicate that DHEA has direct effects on GnRH transcription that appear to be unique from those observed after conversion to other steroidogenic compounds.
PMID: 12782399 [PubMed - indexed for MEDLINE]
Dr. Lats,
DHEA and Preg can eventually suppress T production just like any other pro-hormone/steroid product... so we say to limit the usage time to 4 weeks. Dermacine would stack well with just about any other pro-hormone product on the market too. Only difference is that Dermacrine only has naturally occurring hormones so you probably would notice less sides compared to running the exotic drol-tren-winny-halo type pro-hormone supps.
Id say the 3 main benefits with Dermacrine are strength, fat-loss, and immune system function.
-Pp
DHEA and pregnenolone. Is it harmful or supressive for someone to take these compounds? Any one have experience?
What is the logic behind putting these into one's supplement?
I've been looking into a company's supp, and these two are in it, along side some anti-estrogens..
I know Reset-ad has preg, made to help restore adrenals. I know preg is also a precursor of a lot of hormones..
Pregnenolone steriod hormone and is a precursor to other naturally occurring hormones in the body, including dehydroepiandrosterone (DHEA), progesterone, estrogen, testosterone, and cortisol. Synthesized directly from cholesterol, pregnenolone is responsible for countless functions in our bodies. Benefits of pregnenolone supplementation may include enhancement of memory and cognitive function, fighting fatigue and stress, alleviating symptoms of arthritis, reduction of excess cholesterol, and fighting depression, amongst others. Pregnenolone is said to be the most potent memory enhancer known to science.
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Looks like it would suppress gnrh.
what is the logic behind pregnenolone restoring the adrenals? It is completely non-sensical
its like saying you are giving someone androstenedione to restore the testes
Is it going to suppress the adrenals?
DHEA and pregnenolone. Is it harmful or supressive for someone to take these compounds? Any one have experience?
What is the logic behind putting these into one's supplement?
I've been looking into a company's supp, and these two are in it, along side some anti-estrogens..
I used Dermacrine in my last post cycle therapy and I was truly impressed with the product
pregenolone plays the exact same role in the testes as it does in the adrenals. its a early intermediate in the steroidogenic pathway
not much of it gets released into the blood however. most that is manufactured in the body happens in the glands themselves as part of steroidogenesis. so it does not stick around
its physiological activity in the body is not significant enough to shut down either the testes or the adrenals at normal concentrations
The logic of putting pregnenolone into our topical Dermacrine was not only for the neuro-steroid benefits but to help balance out the dose of DHEA. The metabolite progesterone (from pregnenolone) will help reduce the amount of 5a-reduced metabolites from the DHEA, thus helping to limit hair loss.
-Pp