Home Endocrinology & Hormones Estrogen/progestogen Receptor

Estrogen/progestogen Receptor agonists/modulators

Estrogens receptors, steroid hormones, play a key role in many cell processes such as cell growth and cell differentiation. A number of cellular signaling pathways influence the ER-dependent gene expression modulating ER conformational changes or co-regulators recruitment. ER alpha not only can be activated by EGF, but can be activated by other growth factors including insulin, insulin-like growth factor-1 (IGF-1) and TGF-beta. In addition, heregulin, interleukin-2, and dopamine can also modulate ER activity. The phosphorylation of co-activators (SRC-1 and SRC-2) by MAPK pathway results in a general reduction in ER alpha transcriptional activity.

Other Endocrinology & Hormones Related Inhibitors

Adrenergic Receptor Androgen Receptor Aromatase 5-alpha Reductase RAAS Glucocorticoid Receptor ACE Mineralocorticoid Receptor PGDS Progesterone Receptor

Isoform-selective Products

Cat.No. Product Name Information Product Use Citations Product Validations
S1191 Fulvestrant (ICI-182780) Fulvestrant is an estrogen receptor (ER) antagonist with IC50 of 0.94 nM in a cell-free assay. Fulvestrant also induces autophagy and apoptosis and has antitumor activity.
Nat Genet, 2025, 57(6):1452-1462
J Clin Invest, 2025, e188839
Cell Rep Med, 2025, 6(7):102192
Verified customer review of Fulvestrant (ICI-182780)
S7827 4-Hydroxytamoxifen (Afimoxifene) 4-Hydroxytamoxifen (Afimoxifene) is the active metabolite of tamoxifen and a selective estrogen receptor (ER) modulator that is widely used in the therapeutic and chemopreventive treatment of breast cancer. It activates on-target modification frequency for intein-Cas9 variants.
Signal Transduct Target Ther, 2025, 10(1):97
Cell Death Differ, 2025, 10.1038/s41418-025-01514-7
Cell Rep, 2025, 44(5):115652
Verified customer review of 4-Hydroxytamoxifen (Afimoxifene)
S8956 (Z)-4-Hydroxytamoxifen (Z)-4-Hydroxytamoxifen ((Z)-4-OHT, trans-4-Hydroxytamoxifen, 4-Monohydroxytamoxifen) is a selective modulator of estrogen receptor (SERM) with IC50 of 3.3 nM for the [3H]oestradiol binding to oestrogen receptor.
Mol Syst Biol, 2025, 10.1038/s44320-025-00104-6
Oncogene, 2025, 10.1038/s41388-025-03367-3
bioRxiv, 2025, 2024.12.19.629395
S8687 MPP dihydrochloride Methyl-piperidino-pyrazole (MPP) dihydrochloride is a highly selective antagonist for estrogen receptor alpha (ERα), with an affinity 200 times greater than for estrogen receptor beta (ERβ). It inhibits 17β-estradiol binding to ERα by inducing conformational changes that alter the receptor’s binding site and also increases the energy required for genistein's interaction with ERα.
Drug Des Devel Ther, 2024, 18:4943-4960
S9629 Elacestrant (RAD1901) Dihydrochloride Elacestrant (RAD1901) Dihydrochloride is an orally available selective estrogen receptor degrader (SERD) with IC50 of 48 nM and 870 nM for ERα and ERβ, respectively.
Front Oncol, 2022, 12:857590
S9862 Vepdegestrant (ARV-471) Vepdegestrant (ARV471) is an orally bioavailable estrogen receptor-targeting (ER-targeting) PROTAC for the treatment of patients with locally advanced or metastatic ER+/HER2- breast cancer.
S1238 Tamoxifen Tamoxifen is an orally active, selective estrogen receptor modulator (SERM) which exhibits both estrogenic agonist and antagonist effects. It blocks estrogen action in breast cells and can activate estrogen activity in other cells, such as bone, liver, and uterine cells. Tamoxifen is a potent Hsp90 activator and enhances the Hsp90 molecular chaperone ATPase activity.
Cell Discov, 2025, 11(1):89
Nat Genet, 2025, 57(9):2192-2202
Cell Metab, 2025, 37(8):1715-1731.e11
Verified customer review of Tamoxifen
S1709 17β-Estradiol Estradiol (17β-estradiol, β-Estradiol, E2, 17β-Oestradiol) is a human sex hormone and steroid, and the primary female sex hormone. Estradiol upregulates IL-6 expression through the estrogen receptor β (ERβ) pathway.
Cancer Cell, 2025, 43(5):891-904.e10
Nat Commun, 2025, 16(1):758
Cell Rep Med, 2025, 6(7):102192
S2606 Mifepristone (RU-486) Mifepristone is a remarkably active antagonist of progesterone receptor and glucocorticoid receptor with IC50 of 0.2 nM and 2.6 nM, respectively. Mifepristone promotes cell autophagy and apoptosis, decreases Bcl-2 level and increases Beclin1 level, accompanied by weakened interaction between Bcl-2 and Beclin1.Mifepristone (RU486) can be used to induce animal models of Spontaneous Abortion.
Pharmacol Res, 2025, 215:107696
Cell Death Dis, 2025, 16(1):237
J Virol, 2025, 99(2):e0147224
Verified customer review of Mifepristone (RU-486)
S1972 Tamoxifen Citrate Tamoxifen Citrate is a selective estrogen receptor modulator (SERM). This compound is also a potent Hsp90 activator and enhances the Hsp90 molecular chaperone ATPase activity. It induces apoptosis and autophagy.
bioRxiv, 2025, 2025.07.21.666025
bioRxiv, 2024, 2023.05.10.540211
EMBO Rep, 2023, 24(5):e55835
Verified customer review of Tamoxifen Citrate

Signaling Pathway Map