在B16-F10细胞中激发黑色素的含义,对乌比奎丁-蛋白酶体系统的影响
Dainesy Santos Martins1, Marilene Demasi2, Daniel de Lima Bellan3
1Postgraduate Program in Biochemistry Sciences, Department of Biochemistry and Molecular Biology, Federal University of Paraná (UFPR), Curitiba, PR, Brazil.
耐BTZ等蛋白酶体抑制剂的黑色素瘤细胞可以通过向泛化过程来克服. 使用PYZD-4409抑制E1酶有效诱导黑色素瘤细胞的亡,提供了一个有前途的治疗策略.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 生物化学 生化学
背景情况:
- 瘤细胞对癌症疗法 (化疗,免疫疗法,向疗法) 的耐药性是一个重大的临床挑战.
- 无素-蛋白酶体系统 (UPS) 对于细胞蛋白质降解至关重要,使得蛋白酶体成为一个有前途的治疗点.
- 黑色素生成,黑色素的生产过程,可能与黑色素瘤对癌症治疗的抵抗有关.
研究的目的:
- 为了研究黑色素瘤细胞的反应,与或没有黑色素生成刺激,到无素蛋白酶体系统 (UPS) 抑制剂.
- 在黑色素瘤模型中评估蛋白酶体抑制剂 (BTZ) 和E1无化抑制剂 (PYZD-4409) 的疗效,这些蛋白质酶体抑制剂具有不同的黑色素生成活性.
主要方法:
- 利用小鼠黑色素瘤细胞系B16-F10,有或没有刺激的黑色素生.
- 使用UPS抑制剂Bortezomib (BTZ) 和PYZD-4409来评估细胞活力,细胞亡和蛋白质酶抑制.
- 量化细胞活力,粘附性和细胞亡标记 (活性卡斯巴-3).
主要成果:
- 色生成刺激的B16-F10细胞对BTZ表现出耐药性,蛋白质酶抑制减少,对细胞活力和细胞亡的影响减弱.
- 在非刺激的B16-F10细胞中BTZ治疗有效抑制了蛋白酶体,降低了细胞活力,并诱导了亡.
- 治疗PYZD-4409,抑制E1酶在无处不在,减少细胞活力和诱导细胞亡,不论是黑色素发生的刺激.
结论:
- 抑制蛋白质无化,而不是蛋白酶体抑制,为黑色素瘤治疗提供了一个可行的替代方案,特别是在高度黑色素的瘤中.
- 像BTZ这样的蛋白质酶抑制剂可能在由黑色素发育刺激的黑色素瘤中效果较差,原因是获得了耐药性.
- 针对泛化途径的初始步骤提供了一个有希望的策略,以克服黑色素瘤的治疗耐药性.
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