Estrogen Receptor/ERR Antagonist

Fulvestrant (ICI 182780) is a pure antiestrogen and a potent estrogen receptor (ER) antagonist with an IC₅₀ of 9.4 nM. Fulvestrant is also a GPR30 agonist. Fulvestrant effectively inhibits the growth of ER-positive MCF-7 cells with an IC₅₀ of 0.29 nM. Fulvestrant also induces autophagy and has antitumor efficacy.

hFSH-β-(33-53) is a polypeptide corresponding to residues 33-53 of hFSH-β, and also a follicle-stimulating hormone (FSH) antagonist. hFSH-β-(33-53) stimulates basal estradiol synthesis in cells. hFSH-β-(33-53) prolongs vaginal estrus in mice with normal estrous cycles.

PHTPP is a selective estrogen receptor β (ERβ) antagonist with 36-fold selectivity over ERα.

G15 is a high affinity and selective G-protein-coupled estrogen receptor (GPER/GPR30) antagonist with a K_i of 20 nM.

Giredestrant (GDC-9545), a non-steroidal estrogen receptor (ER) ligand, is an orally active and selective ER antagonist. Giredestrant potently competes with Estradiol for binding and induces a conformational change within the ER ligand binding domain. Giredestrant has anti-tumor activity.

Raloxifene hydrochloride (Keoxifene hydrochloride) is a second generation selective and orally active estrogen receptor modulator. Raloxifene hydrochloride produces estrogen-agonistic effects on bone and lipid metabolism and estrogen-antagonistic effects on uterine endometrium and breast tissue.

XCT-790 is a potent and selective inverse agonist for ERRα with an IC₅₀ value of 0.37 μM. XCT-790 induces cell death in chemotherapeutic resistant cancer cells. XCT-790 (Compound 12) is inactive against ERRγ and the estrogen receptors ERα and ERβ.

G-36 is a cell-permeable nonsteroidal antagonist of the G protein-coupled estrogen receptor (GPER/GPR30), which selectively inhibits estrogen-mediated PI3K activation through GPER, rather than Erα. G-36 also inhibits estrogen-mediated calcium mobilization (IC₅₀=112 nM). G-36 is promising for research in the field of cancer.

4,4'-Sulfonyldiphenol (Bisphenol S; Bis(4-hydroxyphenyl) sulfone), a substitute for Bisphenol A (HY-18260), is widely used in industrial and consumer products. 4,4'-Sulfonyldiphenol is an oally ative estrogen receptor (ER) agonist and can competitively bind to thyroid hormone receptors (TR) with IC₅₀ values for TRα and TRβ are 2650 μM and 2294 μM respectively, thereby affecting breast development and reducing the expression of androgen receptor (AR) in fetal testes. 4,4'-Sulfonyldiphenol promotes the progression of glioblastoma by upregulating the EZH2 mediated PI3K/AKT/mTOR pathway. Under chronic exposure, 4,4'-Sulfonyldiphenol can cause significant lipid deposition and dyslipidemia in the mouse liver by upregulating JunB and Atf3, and has a role in causing obesity at low doses. 4,4'-Sulfonyldiphenol induces intestinal inflammation by altering the intestinal microbiome. 4,4'-Sulfonyldiphenol accelerates the progression of atherosclerosis in zebrafish embryo larvae.

Palazestrant is an antiestrogen and antineoplastic agent. Palazestrant can completely inhibit the activity of 17b-estradiol (E2) with IC₅₀ value of 6.4 nM, and inhibit the proliferation of MCF7 and CAMA-1 cells with IC₅₀ value of 1.4-1.6 nM. Palazestrant can inhibit ER⁺/HER2⁺ cancer.

Phthalic acid is the final common metabolite of phthalic acid esters (PAEs). Phthalic acid can be used for the synthesis of synthetic agents, such as isophthalic acid (IPA), and terephthalic acid (TPA). Phthalic acid has applications in the preparation of phthalate ester plasticizers. Phthalic acid exhibits mutagenic effect and causes genetic damage in mammalian germ cells.

ERRα antagonist-1 (Compound A) is a selective and high affinity agonist for estrogen-related receptor α (ERRα). ERRα antagonist-1 inhibits interaction of ERRα with Proliferator-activated Receptor γ Coactivator-1α (PGC-1α) and PGC-1β, the IC₅₀ values are 170 nM and 180 nM, respectively.

Fulvestrant (Standard) is the analytical standard of Fulvestrant. This product is intended for research and analytical applications. Fulvestrant (ICI 182780) is a pure antiestrogen and a potent estrogen receptor (ER) antagonist with an IC₅₀ of 9.4 nM. Fulvestrant is also a GPR30 agonist. Fulvestrant effectively inhibits the growth of ER-positive MCF-7 cells with an IC₅₀ of 0.29 nM. Fulvestrant also induces autophagy and has antitumor efficacy.

Prochloraz is an imidazole antifungal. Prochloraz is as an estrogen receptor (ER) and androgen receptor (AR) antagonist and an aromatase inhibitor with IC₅₀ values of 25 μM, 4 μM and 0.3 μM, respectively. Prochloraz is able to activate the aryl hydrocarbon receptor (AhR) having an EC₅₀ of 1 μM.

Enclomiphene ((E)-Clomiphene) citrate is a potent and orally active non-steroidal estrogen receptor antagonist, with antioestrogenic property. Enclomiphene citrate can be used for the research of ovarian dysfunction, testosterone deficiency, male hypogonadism and type 2 diabetes.

hFSH-β-(33-53) TFA is a polypeptide corresponding to residues 33-53 of hFSH-β, and also a follicle-stimulating hormone (FSH) antagonist. hFSH-β-(33-53) stimulates basal estradiol synthesis in cells. hFSH-β-(33-53) TFA prolongs vaginal estrus in mice with normal estrous cycles.

H3B-6545 is an oral, selective estrogen receptor covalent antagonist (SERCA) for the research of metastatic ER-positive, HER2-negative breast cancer.

Avobenzone, a dibenzoylmethane compound, is one of the most widely used filters in sunscreens for skin photoprotection in the UVA band. Avobenzone is an endocrine disruptor that directly binds to estrogen receptor β and acts as an estrogen agonist.

N-Desmethyltamoxifen hydrochloride is the major metabolite of tamoxifen in humans. N-Desmethyltamoxifen, a poor antiestrogen, is a ten-fold more potent protein kinase C (PKC) inhibitor than Tamoxifen. N-Desmethyltamoxifen hydrochloride is also a potent regulator of ceramide metabolism in human AML cells, limiting ceramide glycosylation, hydrolysis, and sphingosine phosphorylation.

Estriol (Standard) is the analytical standard of Estriol. This product is intended for research and analytical applications.