01-10-2015, 09:51 AM
Hi Lotus!
I'm a big fan of your work here.
I'd read research on Forscolin, white peony and Genistein, but quercetin surprised me. Is there any more research on quercetin and aromatase? it's a fairly easy to find element in many foods, after all. It looks like capers are the big one for that.
Do you think quercetin would be useful for NBE, or are there other effects that limit it's effectiveness?
I'm a big fan of your work here.
Quote:Posted by Lotus - 09-05-2015 10:39 PM
So I've been looking into forskolin, cAMP and other aromatase ideas. When the afore mentioned items are exposed to E2 I think these levels mentioned below will see increased expression.
To further investigate the mechanism of induction of aromatase in H295R cells by the flavonoid quercetin and isoflavone genistein, their effect on intracellular cAMP production and the promoter-specific expression of mRNA coding for CYP19 was examined. Quercetin and genistein increased intracellular cAMP levels about 1.7-fold and 1.4-fold, respectively, after a 4 h exposure. In comparison, the positive control forskolin elevated cAMP levels over 5-fold. Initial RT-PCR experiments performed to detect cAMP promoter-specific transcript for CYP19 demonstrated that the cAMP analog 8Br-cAMP significantly increased pII and I.3 transcripts in a RNA concentration range between 0.1 and 100 ng (Fig. 4). The relative expression level of pII appeared to be greater than that of I.3, as did its inducibility by 8Br-cAMP, although we emphasize that the RT-PCR method was semiquantitative. Forskolin (data not shown), 8Br-cAMP, genistein and quercetin (Fig. 5) increased CYP19 mRNA levels that were specific for the aromatase promoters pII and I.3 after a 24 h exposure. Quercetin increased pII and I.3-specific transcript about 2.6-fold and 2-fold, respectively; genistein 2.3-fold and 1.8-fold, respectively (Fig. 5). The positive control 8Br-cAMP increased pII and I.3-specific transcript about 2.7-fold and 2.3-fold, respectively (Fig. 5).
Induction and Inhibition of Aromatase (CYP19) Activity by Natural and Synthetic Flavonoid Compounds in H295R Human Adrenocortical Carcinoma Cells
http://toxsci.oxfordjournals.org/content/82/1/70.long
Forskolin promotes aromatase 5 fold
Quercetin promotes aromatase 2-3 fold
White peony promotes aromatase 2 fold
Genistein increased intracellular cAMP levels about 1.7-fold and 1.4-fold,
Inhibition of 5α-reductase results in decreased conversion of testosterone to DHT, leading to increased testosterone and estradiol. Other enzymes compensate to a degree for the absent conversion, spec voifically with local expression at the skin of reductive 17b-hydroxysteroid dehydrogenase, oxidative 3a-hydroxysteroid dehydrogenase, and 3b-hydroxysteroid dehydrogenase enzymes. Inhibition of the enzyme can be classified into two categories: steroidal, which are irreversible, and nonsteroidal. 5-α reductase 2 is the one we're interested in.
I'd read research on Forscolin, white peony and Genistein, but quercetin surprised me. Is there any more research on quercetin and aromatase? it's a fairly easy to find element in many foods, after all. It looks like capers are the big one for that.
Do you think quercetin would be useful for NBE, or are there other effects that limit it's effectiveness?