鉴定了一种新型蛋白酸酶2A激活剂,PPA24,作为FOLFOX抗性结肠直肠癌的潜在治疗药物
Hannah Johnson1, Amandeep Singh1, Asif Raza1
1Department of Pharmacology, Penn State Cancer Institute, The Pennsylvania State University College of Medicine, Hershey, Pennsylvania 17033, United States.
Journal of medicinal chemistry
|July 15, 2024
概括
一种新型化合物,PPA24,有效向结直肠癌 (CRC) 细胞,包括耐药类型. 这种蛋白酸酶2A (PP2A) 激活剂显示出作为新型治疗CRC的前景.
科学领域:
- 药用化学 医学化学
- 癌症生物学 癌症生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 结肠直肠癌 (CRC) 是一个重大的健康挑战,对抗性形式的治疗选择有限.
- 蛋白酸酶2A (PP2A) 是细胞过程的关键调节剂,其失调与癌症有关.
- 现有的PP2A激活剂如NSC49L和iHAP1为开发更强大的治疗剂提供了基础.
研究的目的:
- 设计和合成针对PP2A的新型化合物,用于结直肠癌 (CRC) 治疗.
- 评估这些化合物对标准和耐药CRC细胞系的疗效.
- 为了研究化合物的作用机制和治疗潜力,PPA24.
主要方法:
- 用分子建模和基于碎片的设计来创建新的化学实体.
- 实验室试验用于确定细胞毒性 (IC50值) 和PP2A激活.
- 分子对接和表面等离子体共振 (SPR) 评估了与PP2A的结合亲和力.
- 分析了亡,氧化应激和c-Myc表达.
- 使用CRC异种移植的体内研究评估了治疗疗效和毒性.
- 研究了与标准化疗药物 (gemcitabine,cisplatin) 的联合治疗.
主要成果:
- PPA24 (19a) 成为最有效的化合物,在CRC和FOLFOX耐药细胞中显示IC50值在2.36-6.75μM之间.
- 与现有的激活剂相比,PPA24显示了增强的PP2A激活,优越的结合亲和力和较低的结合能.
- 该化合物诱导了细胞亡和氧化应激,降低了c-Myc水平,并与凝胺和西斯胺协同作用.
- 一种带有PPA24的纳米配方有效地抑制了CRC异种植的生长,没有观察到系统性毒性.
结论:
- PPA24是一种高效的新型PP2A激活剂,对结直肠癌细胞具有显著的细胞毒性作用.
- 它克服FOLFOX耐药性的能力和在体内证明有效性的能力突显了其治疗潜力.
- PPA24是开发结直肠癌新疗法的有希望的候选者,包括耐药亚型.
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