All Photos(1)
Synonym(s):
4-Hydroxy-N-desmethyl-tamoxifen, Endoxifen, Metabolite BX, N-Desmethyl-4-hydroxytamoxifen, Z-Endoxifen
Empirical Formula (Hill Notation):
C25H27NO2
CAS Number:
Molecular Weight:
373.49
MDL number:
UNSPSC Code:
12352200
NACRES:
NA.77
Recommended Products
assay
≥98% (HPLC)
form
powder
color
white to beige
solubility
DMSO: 2 mg/mL, clear
storage temp.
2-8°C
Application
(Z)-Endoxifen has been used to demonstrate the lack of contribution of subventricular zone and leptomeningeal cells in a study determining the generation of neuroblasts from astrocytes.
Biochem/physiol Actions
(Z)-Endoxifen (endoxifen) is an active tamoxifen metabolite generated via actions of cytochrome P450 (CYP) enzymes CYP3A4/5 and CYP2D6. Endoxifen is more potent than tamoxifen as a selective estrogen receptor modulator (SERM) both in vitro and in vivo with good pharmacokinetics and oral availability (∼80% MCF-7 tumor growth inhibition with 4-8 mg/kg/day endoxifen or 20 mg/kg/day tamoxifen in mice via p.o.). Endoxifen also exhibits 4-fold higher PKC inhibitory potency than tamoxifen and can overcome tamoxifen resistance due to cytochrome CYP2D6 polymorphism.
signalword
Danger
hcodes
Hazard Classifications
Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1A - Repr. 1B
wgk_germany
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
Certificates of Analysis (COA)
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Ateeq Ahmad et al.
Breast cancer research and treatment, 122(2), 579-584 (2010-01-07)
Endoxifen is the key active metabolite of tamoxifen, a widely used breast cancer drug. Orally administered tamoxifen, is extensively metabolized by cytochrome P450 (CYP) enzymes, namely CYP3A4 and CYP2D6, into active metabolites, especially endoxifen. Due to genetic polymorphism of CYP2D6
Shagufta et al.
European journal of medicinal chemistry, 143, 515-531 (2017-12-06)
Tamoxifen (ICI 46 474), trans-1-(4-β-dimethylaminoethoxyphenyl)-1,2-diphenylbut-1-ene, is the most commonly used drug for the treatment of estrogen receptor positive breast cancer and has been saving lives worldwide for the past four decades. Tamoxifen is considered a pioneering drug due to its ubiquitous
Todd C Skaar et al.
Clinical pharmacology and therapeutics, 103(5), 755-757 (2018-02-24)
This issue of Clinical Pharmacology & Therapeutics (CPT) includes the Clinical Pharmacogenetics Implementation Consortium (CPIC) guideline for using CYP2D6 genotyping to guide tamoxifen therapy for breast cancer patients. CYP2D6 metabolizes tamoxifen to its more active metabolite, endoxifen, and patients with
Janina Johänning et al.
Archives of toxicology, 92(3), 1099-1112 (2017-12-30)
Tamoxifen, a standard therapy for breast cancer, is metabolized to compounds with anti-estrogenic as well as estrogen-like action at the estrogen receptor. Little is known about the formation of estrogen-like metabolites and their biological impact. Thus, we characterized the estrogen-like
Paul Chen et al.
Cellular & molecular biology letters, 23, 3-3 (2018-01-09)
Endoxifen, an active metabolite of tamoxifen, has been shown to be an effective anti-estrogenic agent in estrogen receptor-positive breast cancer patients. In melanoma, estrogen receptor expression is shown to be associated with disease progression. However, the therapeutic benefit of endoxifen
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