目錄:MedChemExpress LLC>>抗體抑制劑>> Lactacystin蛋白酶體抑制劑-MCE
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Lactacystin 是一種有效的、口服活性、不可逆的、細胞滲透性的,選擇性的 20S 蛋白酶體 (proteasome) 抑制劑 (IC50 = 4.8 μM)。Lactacystin 還能抑制溶酶體酶組織蛋白酶 A (cathepsin A)。Lactacystin 抑制細胞生長,誘導細胞凋亡 (apoptosis) 和周期阻滯,并具有抗病毒和抗氧化活性。Lactacystin 誘導神經突生長,誘發高血壓。Lactacystin 在癌癥、神經系統疾病、高血壓和瘧疾等方面具有研究潛力。
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生物活性
體外研究
Lactacystin (高達 25.6 µM, 1 h) 對 HeLa 和 SH-SY5Y 細胞無細胞毒性,可使 HeLa 細胞和 SH-SY5Y 細胞的 RVP 感染率分別降低 63.8% 和 74.5%[2]。
Lactacystin (2.5 μM) 聯合 Parthenolide (HY-N0141) (5 μM) 可協同增加耐藥 L1210 細胞的凋亡比例[3]。
Lactacystin (2.5, 5 和 10 µM, 24 h) 抑制 C6 細胞的增殖 (IC50 值為 10 μM),增加凋亡[4]。
Lactacystin (10μM, 24 h) 增加 Hela 細胞內 Cisplatin (HY-17394) 誘導的內質網應激相關的凋亡[5]。
Lactacystin (7.5 μM, 4-48 h) 可提高 HT-29 細胞的活性氧水平[6]。
Lactacystin (1, 2.5, 5 μM, 24 h) 誘導新生大鼠皮質星形膠質細胞星性化[7]。
Lactacystin (10 μM, 8-24 h) 誘導 PC12 細胞凋亡,G2/M 細胞周期阻滯[10]。
細胞活力測定[4]
細胞系:C6細胞
濃度:0, 2.5, 5, 10 µM
孵育時間:24小時
結果:抑制了C6細胞的生長和活力至28.9%,并增加了細胞凋亡。
體內研究
Lactacystin (2 μg, ICV) 在注射后 5-7 天誘導年輕和成年小鼠帕金森病樣運動表型[8]。
Lactacystin (1.0 ug或5.0µg/20g,連續7天) 導致 C6 原位異種移植腫瘤模型腫瘤明顯縮小,并促進組織凋亡[4]。
Lactacystin (5 mg/kg/每天,溶解在水中,給藥6周) 誘導成年雄性 Wistar 大鼠高血壓模型[9]。
動物模型:8-9周(幼年)和12-14個月(成年)的雄性C57Bl/6RccHsd小鼠[2]
劑量:2 µg
給藥方式:微注射
結果:在注射后5-7天內,在幼年和成年小鼠中誘導了類似帕金森病的運動表型
參考文獻
[1]. Csizmadia V, et al. Effect of proteasome inhibitors with different chemical structures on the ubiquitin-proteasomesystem in vitro. Vet Pathol. 2010 Mar;47(2):358-67.
[2]. Shaobo Wang, et al. The ubiquitin-proteasome system is essential for the productive entry of Japanese encephalitis virus. Virology. 2016 Nov;498:116-127.
[3]. Ann H Cory, et al. Lactacystin, a proteasome inhibitor, potentiates the apoptotic effect of parthenolide, an inhibitor of NFkappaB activation, on drug-resistant mouse leukemia L1210 cells. Anticancer Res 2002 Nov-Dec;22(6C):3805-9.
[4]. Haifeng Wang, et al. The proteasome inhibitor lactacystin exerts its therapeutic effects on glioma via apoptosis: an in vitro and in vivo study. J Int Med Res. 2013 Feb;41(1):72-81.
[5]. Ye Xu, et al. Proteasome inhibitor lactacystin enhances cisplatin cytotoxicity by increasing endoplasmic reticulum stress-associated apoptosis in HeLa cells. Mol Med Rep. 2015 Jan;11(1):189-95.
[6]. Nils-Erik Huseby, et al. The proteasome inhibitor lactacystin enhances GSH synthesis capacity by increased expression of antioxidant components in an Nrf2-independent, but p38 MAPK-dependent manner in rat colorectal carcinoma cells. Free Radic Res. 2016;50(1):1-13.
[7]. Qing-Guo Ren, et al. Lactacystin stimulates stellation of cultured rat cortical astrocytes. Neurochem Res. 2009 May;34(5):859-66.
[8]. Savolainen MH, et al. Nigral injection of a proteasomal inhibitor, lactacystin, induces widespread glial cell activationand shows various phenotypes of Parkinson's disease in young and adult mouse. Exp Brain Res. 2017 Jul;235(7):2189-2202.
[9]. Fedor Simko, et al. Lactacystin-Induced Model of Hypertension in Rats: Effects of Melatonin and Captopril. Int J Mol Sci. 2017 Jul 25;18(8):1612.
[10]. Zhentao Zhang, et al. Cell cycle events mediate lactacystin-induced apoptotic death of neuronal PC12 cells. Cell Biol Int. 2010 Dec;34(12):1181-7.