他莫昔芬

属性

无菌性

(Not packaged in a sterile environment)

检测方案

≥99%

mp

97-98 °C (lit.)

溶解性

H₂O: insoluble <0.1% at 20 °C
chloroform: soluble 50 mg/mL, clear, colorless to faintly yellow
2-propanol: soluble
DMSO: soluble
ethanol: soluble
methanol: soluble
propylene glycol: soluble

抗生素抗菌谱

neoplastics

作用机制

enzyme | inhibits

创始人

AstraZeneca

储存温度

2-8°C

SMILES字符串

CC\C(c1ccccc1)=C(/c2ccccc2)c3ccc(OCCN(C)C)cc3

InChI

1S/C26H29NO/c1-4-25(21-11-7-5-8-12-21)26(22-13-9-6-10-14-22)23-15-17-24(18-16-23)28-20-19-27(2)3/h5-18H,4,19-20H2,1-3H3/b26-25-

一般描述

Tamoxifen (TC), a selective estrogen receptor modulator (SERM), is used against breast cancer in both men and women. It also acts as a prophylactic agent against breast cancer in women.[1] This protein kinase C inhibitor and anti-angiogenetic factor is a prodrug that is metabolized to active metabolites 4-hydroxytamoxifen (4-OHT) and endoxifen by cytochrome P450 isoforms CYP2D6 and CYP3A4. In breast cancer, the gene repressor activity of tamoxifen against ERBB2 is dependent upon PAX2. TC blocks estradiol-stimulated vascular endothelial growth factor (VEGF) production in breast tumor cells. Patients with estrogen receptor-positive tumors are more likely to benefit from tamoxifen. It exhibits both estrogenic agonist and antagonist effects by selectively binding to estrogen receptors in different parts of the body.

This nonsteroidal triphenylethylene derivative suppresses tumor growth and has been reported to be a carcinogen and teratogen in animals. Additionally, TC may also protect bone from estrogen-deficiency bone loss, lower plasma cholesterol, and have been implicated in liver carcinogenesis in rats. Other actions of TC include the reduction of plasma levels of insulin-like growth factor, induction of cells surrounding cancer cells to secrete transforming growth factor β, and inhibition of membrane lipid peroxidation, likely by decreasing membrane fluidity.

应用

他莫昔芬已用于：

· MTS (3-(4,5-二甲基噻唑-2-基)-5-(3-羧基甲*基苯基)-2-(4-磺酸苯基)-2H-四唑) 试验和结晶紫染色试验，以评估细胞活力。

· 诱导Dicer条件性敲除小鼠中的Dicer消融，以研究Dicer缺乏对脂肪细胞分化和功能的作用。

· 研究其对来源于T细胞急性成淋巴细胞性白血病（T-ALL）的耐糖皮质激素（GC）细胞系Jurkat的生物学作用。

· 研究他莫昔芬治疗对小鼠中雌激素受体α（ERα）介导的下丘脑-POA的生理学作用。

· 诱导Cre重组酶活性进行基因操控。

· 促进ect2^flox等位基因在小鼠器官中的重组。

· 研究其对脂多糖（LPS）诱导的小胶质细胞激活的影响。

生化/生理作用

蛋白激酶 C 抑制剂。诱发人类恶性神经胶质瘤细胞系的细胞凋亡。他莫昔芬及其代谢产物 4-羟基他莫昔芬是选择性雌激素反应调节剂 (SERM)，在乳腺中用作雌激素拮抗剂。阻止乳腺肿瘤细胞中雌二醇刺激的 VEGF 的产生。

制备说明

他莫昔芬可以50 mg/ml溶于*仿并产生一种透明无色至淡黄色的溶液。它还可溶于甲醇、乙醇、2-丙醇和丙二醇。他莫昔芬的储备溶液可按10 mM制备于DMSO中。然而，它几乎不溶于水（溶解度是<0.01%, 20° C）。溶液对紫外光敏感，而DMSO溶液可避光稳定储存在 -20° C。