Pharmaceutical grade on hot selling 17α-estradiol 57-91-0 Good Supplier In China CAS NO.57-91-0

α-Estradiol is an endogenous ligand for estrogen receptors ERα (K_i = 0.2 nM) and ERβ (K_i = 1.2 nM). Studies indicate that α-Estradiol is a short acting estrogen which only forms complexes with estrogen ligand receptors for a short period of time. These studies suggest that α-estradiol is beneficial in studying the affects caused by the MAPK signaling cascade such as cell division, neuronal differentiation, and neuronal survival in the developing brain. Furthermore, α-estradiol inhibits the influx of calcium in human aortic smooth muscle cells.

17alpha-estradiol is an estradiol that is estra-1,3,5(10)-triene substituted by hydroxy groups at positions 3 and 17 (the 17alpha stereoisomer). It is a 17alpha-hydroxy steroid, a 3-hydroxy steroid and an estradiol.

17α-Estradiol is the natural optical isomer of 17β-estradiol, the major estrogen secreted by the premenopausal ovary. 17α-Estradiol is a less active isomer than its counterpart, displaying 100-fold lower estrogenic activity relative to 17β-estradiol. It can inhibit 5α-reductase, which plays a role in regulating hair growth. 17α -estradiol is reported to activate the MAPK/ERK and PI3K-Akt signaling pathways via activation of the estrogen receptor-X and has been shown to be neuroprotective after an ischemic stroke and oxidative stress and in transgenic mice with Alzheimer’s disease.