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Possible Interaction: Trilostane and Pregnenolone



Research Papers that Mention the Interaction

Trilostane (0.1-1 muM) completely blocked conversion of pregnenolone to progesterone and OH-progesterone; the release of androstenedione was at most only halved, whereas the release of dehydroepiandrosterone and testosterone was greatly enhanced.
Toxicology in vitro : an international journal published in association with BIBRA  •  1996  |  View Paper
In the presence of a 3β-hydroxysteroid dehydrogenase inhibitor, trilostane , FGF9 also decreased (P < 0.05) pregnenolone production.
Endocrinology  •  2012  |  View Paper
Trilostane competitively inhibits the enzyme 3-beta hydroxysteroid dehydrogenase (3β-HSD), which converts pregnenolone (P5) to progesterone (P4) and dehydroepiandrosterone (DHEA) to androstendione (A4).
Veterinary Research Communications  •  2011  |  View Paper
Trilostane caused a potent inhibition of the rate of conversion of PREG to PROG.
The Journal of Steroid Biochemistry and Molecular Biology  •  2003  |  View Paper
Trilostane , a competitive inhibitor of the 3beta-HSD caused a potent inhibition of the rate of conversion of PREG to PROG (IC50 = 4.06 +/- 2.58 microm).
Journal of neurochemistry  •  2003  |  View Paper
The conversions of 25-OH-cholesterol into pregnenolone in the presence of trilostane (an inhibitor of 3beta-hydroxysteroid dehydrogenase) and corticosterone into aldosterone, as well as the expression of the steroidogenic acute regulatory protein in ZG cells, were greater in AP-grafted rats than in CX-grafted rats.
Journal of Investigative Medicine  •  2002  |  View Paper
Trilostane , a 3beta-hydroxysteroid-deshydrogenase inhibitor, blocks the pregnenolone to progesterone conversion and leads to a decrease of progesterone.
The European journal of neuroscience  •  1999  |  View Paper
The addition of pregnenolone (a precursor of P biosynthesis) to the culture medium caused an increase in the luteal and placental P levels, whereas the addition of trilostane (an inhibitor of 3beta-HSDH) reduced them.
General and comparative endocrinology  •  1998  |  View Paper
Trilostane inhibited the conversion of pregnenolone to progesterone in vitro (P < 0.001) while mediating an increase (P < 0.05) in concentrations of 5 alpha-pregnane-3,20-dione and 3 beta-hydroxy-5 alpha-pregnan-20-one.
Journal of reproduction and fertility  •  1996  |  View Paper
Trilostane significantly (P < 0.05) elevated pregnenolone levels within 1 h of treatment compared to those in vehicle-treated animals; after 1 day of treatment, the mean pregnenolone level (173 nmol/L) was 86-fold greater than the control value.
The Journal of clinical endocrinology and metabolism  •  1994  |  View Paper
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