steroidogenesis

Suramin Sodium Salt (BAY-205) is a sodium salt form of suramin, a polysulphonated naphthylurea with potential antineoplastic activity. Suramin blocks the binding of various growth factors, including insulin-like growth factor I (IGF-I), epidermal growth factor (EGF), platelet-derived growth factor (PDGF), and tumor growth factor-beta (TGF-beta), to their receptors, thereby inhibiting endothelial cell proliferation and migration. This agent also inhibits vascular endothelial growth factor (VEGF)- and basic fibroblast growth factor (bFGF)-induced angiogenesis; retroviral reverse transcriptase; uncoupling of G-proteins from receptors; topoisomerases; cellular folate transport; and steroidogenesis.

Phthalic acid mono-2-ethylhexyl ester (Phthalic Acid Monooctyl Ester) is a major bioactive metabolite of diethylhexyl phthalate (DEHP), which inhibits the 17,20 lyase activity of CYP17. The Cyp17a1 gene is specifically targeted by MEHP, explaining the MEHP-induced suppression of steroidogenesis observed.

Diethylumbelliferyl phosphate (DEUP) is a potent and selective inhibitor of cholesterol esterase that does not inhibit protein kinase A activity in vitro. It disrupts steroidogenesis by blocking cholesterol transport to mitochondria in steroidogenic cells, with an IC50 of 11.6 μM. This compound may also limit the absorption of dietary cholesterol.

Gibberellic acid (GA3) is a hormone found in plants and fungi.

Pregnanetriol is a metabolite of 17α-hydroxyprogesterone .1,2It is formed from 17α-hydroxyprogesterone by reduction of the C-20 ketone.2Urinary levels of pregnanetriol are elevated in patients with 21-hydroxylase deficiency and congenital adrenal hyperplasia.3,4 1.Kamrath, C., Hartmann, M.F., Boettcher, C., et al.Diagnosis of 21-hydroxylase deficiency by urinary metabolite ratios using gas chromatography-mass spectrometry analysis: Reference values for neonates and infantsJ. Steroid Biochem. Mol. Biol.15610-16(2016) 2.Schiffer, L., Barnard, L., Baranowski, E.S., et al.Human steroid biosynthesis, metabolism and excretion are differentially reflected by serum and urine steroid metabolomes: A comprehensive reviewJ. Steroid Biochem. Mol. Biol.194105439(2019) 3.Disorders of steroidogenesis guide to steroid profiling and biochemical diagnosis1(2019) 4.Shackleton, C.H.L.Role of a disordered steroid metabolome in the elucidation of sterol and steroid biosynthesisLipids47(1)1-12(2012)

Propylparaben sodium (propyl parahydroxybenzoate) is a naturally occurring antimicrobial preservative found in plants and bacteria. Widely utilized in cosmetics, pharmaceuticals, and foods, this compound impairs antral follicle growth and steroidogenic function by modifying the cell-cycle, apoptosis, and steroidogenesis pathways. Additionally, propylparaben sodium reduces sperm count and motility in rats.

Azastene is a progesterone antagonist that has been shown to inhibit ovarian & adrenal steroidogenesis in rats.

Adrenocorticotropic hormone (6-24) (ACTH (6-24) (human)) is a fragment of ACTH that acts as a competitive inhibitor of steroidogenesis prompted by full-length ACTH (1-39) and the shortened ACTH (5-24), with dissociation constants (Kd) of 13.4 nM and 3.4 nM, respectively. It also impedes the production of corticosterone and the accumulation of cyclic AMP (cAMP) triggered by human parathyroid hormone (hPTH 1-34) [1] [2].