针对细胞选择性和向性降解激活的STAT3的Oligo-PROTAC战略
Jeremy Hall1, Zhuoran Zhang1, Supriyo Bhattacharya2
1Department of Immuno-Oncology, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA.
Molecular therapy. Nucleic acids
|February 22, 2024
概括
这项研究开发了一种新型的蛋白质分解向化母 (PROTAC) 策略,以向癌症中的关键蛋白质STAT3. 这种新化合物C-STAT3DPROTAC有效地降低了淋巴瘤细胞中的STAT3水平,并导致小鼠的瘤回归.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 药物开发 药物开发
背景情况:
- 诱性寡度氧核酸 (ODN) 可以准像STAT3这样的转录因子,但在效力和传递方面存在局限性.
- STAT3 是一种关键的转录因子,与各种癌症有关,使其成为一个有吸引力的治疗点.
研究的目的:
- 开发一种强大且对细胞有选择性的方法,使用蛋白质解离向嵌合体 (PROTAC) 方法向STAT3.
- 为STAT3向的PROTAC创建一个有针对性的传递系统,以提高其在癌症治疗中的有效性.
主要方法:
- 将STAT3特定的诱ODN与thalidomide结合在一起,以创建STAT3DPROTAC.
- 进一步将STAT3DPROTAC与向托尔类受体9 (TLR9) 的CpG寡核酸结合以进行向性传递 (C-STAT3DPROTAC).
- 在细胞系和淋巴瘤小鼠模型中进行体外和体内研究以评估疗效.
主要成果:
- STAT3DPROTAC有效降低了目标细胞中的STAT3蛋白水平,但没有影响STAT1或STAT5.
- C-STAT3DPROTAC证明了TLR9表达性髓状细胞,B细胞和淋巴瘤细胞的选择性吸收.
- C-STAT3DPROTAC减少了对淋巴瘤细胞存活和增殖至关重要的STAT3调节基因,导致小鼠的瘤回归.
结论:
- 与诱ODN相结合的PROTAC策略为癌症治疗中细胞选择性STAT3向提供了一种可行的方法.
- 这种方法有可能针对其他瘤性转录因子,以改善癌症治疗.
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