4-Hydroxytamoxifen(4-OHT,AbMole,M10252)是一種選擇性雌激素受體調(diào)節(jié)劑(SERM),在研究中主要作為雌激素受體拮抗劑發(fā)揮作用,其作用機(jī)制涉及抑制雌激素受體活性并影響轉(zhuǎn)錄因子的招募[1, 2]。4-Hydroxytamoxifen在細(xì)胞實(shí)驗(yàn)中,常用于人乳腺癌細(xì)胞系(如MCF-7、MDA-MB 231、T-47D)的研究,例如通過(guò)濃度梯度誘導(dǎo)細(xì)胞以(100-1000 nM)建立耐藥細(xì)胞模型(如MCF-7-TamR)[3]。4-Hydroxytamoxifen在MCF-7細(xì)胞中,可顯著抑制細(xì)胞增殖并調(diào)控凋亡相關(guān)基因的表達(dá)[3]。4-Hydroxytamoxifen( CAS No.:68047-06-3)在分子與細(xì)胞生物學(xué)中還是一種可以調(diào)控外源基因表達(dá)的常用化合物,例如4-Hydroxytamoxifen通過(guò)激活CreER-T2酶,介導(dǎo)loxP位點(diǎn)特異性重組,實(shí)現(xiàn)外源基因在轉(zhuǎn)基因小鼠模型中的條件性敲除或表達(dá)。
在動(dòng)物實(shí)驗(yàn)中,4-Hydroxytamoxifen通過(guò)腹腔注射用于雙轉(zhuǎn)基因Cspg4-cre/Esr1/ROSA26Sortm14(CAG-tdTomato)小鼠模型,誘導(dǎo)重組并觸發(fā)紅色熒光蛋白表達(dá)[4]。4-Hydroxytamoxifen還可用于動(dòng)物腫瘤模型和某些病毒模型,常見(jiàn)于小鼠實(shí)驗(yàn)。例如
4-Hydroxytamoxifen(4-OHT,AbMole,M10252)在異種移植或同種移植腫瘤模型中,被用于評(píng)估抗腫瘤效果。在VSV(水皰性口炎病毒)模型中,4-Hydroxytamoxifen作為小分子誘導(dǎo)劑,可激活I(lǐng)ntein剪接以調(diào)節(jié)病毒復(fù)制[5]。
參考文獻(xiàn)及鳴謝
[1] Shtaiwi, A.; Adnan, R.; Khairuddean, M.; et al. Computational investigations of the binding mechanism of novel benzophenone imine inhibitors for the treatment of breast cancer.
RSC advances 2019,
9 (61), 35401-35416.
[2] Somsen, B. A.; Sijbesma, E.; Leysen, S.; et al. Molecular basis and dual ligand regulation of tetrameric estrogen receptor alpha/14-3-3zeta protein complex.
The Journal of biological chemistry 2023,
299 (7), 104855.
[3] Cheng, S.; Castillo, V.; Welty, M.; et al. BreastDefend enhances effect of tamoxifen in estrogen receptor-positive human breast cancer in vitro and in vivo.
BMC complementary and alternative medicine 2017,
17 (1), 115.
[4] Valny, M.; Honsa, P.; Kirdajova, D.; et al. Tamoxifen in the Mouse Brain: Implications for Fate-Mapping Studies Using the Tamoxifen-Inducible Cre-loxP System.
Frontiers in cellular neuroscience 2016,
10, 243.
[5] Zhao, Z.; Wang, B.; Wu, S.; et al. Regulated control of virus replication by 4-hydroxytamoxifen-induced splicing.
Frontiers in microbiology 2023,
14, 1112580.