紧结的小分子氧化酶2抑制剂 降低细胞内虹素激活
Karishma Kailass1, Dominick Casalena2, Lina Jenane1
1Department of Chemical and Physical Sciences, University of Toronto Mississauga, Mississauga, Ontario, Canada L5L 1C6.
研究人员确定了新型的小分子抑制剂,用于激活二氧化碳聚酶2 (CES2),这是一种关键的酶,用于激活氨酸 (CPT-11). 这些CES2抑制剂在胰腺癌治疗中显示出控制CPT-11毒性的潜力.
科学领域:
- 生物化学 生化学
- 药理学 药理学是指药理学的学科.
- 在瘤学瘤学.
背景情况:
- 碳氧乙酶2 (CES2) 是转化氨酸 (CPT-11) 到其活性形式SN-38.8的关键.
- 高CES2活性可导致有毒的SN-38水平和严重的副作用,如腹,在胰腺管腺癌 (PDAC) 患者.
- 抑制CES2提供了一种控制CPT-11药理动力学和SN-38生产的策略.
研究的目的:
- 发现和验证CES2的小分子抑制剂.
- 通过调节SN-38生成,确定可以减轻CPT-11毒性的化合物.
- 探索CES2抑制作为PDAC治疗的治疗方法.
主要方法:
- 高通量查以确定CES2抑制剂.
- 剂量反应测定和反查以验证和选择性.
- 基于细胞的测定以确认CES2抑制和细胞透性.
- 用纯化的CES2和CPT-11进行酶抑制测定.
- 评估抑制剂在预防PDAC细胞中CPT-11诱导的细胞死亡方面的疗效.
主要成果:
- 通过高通量查发现了18种小分子CES2抑制剂.
- 16种抑制剂对CES2表现出选择性,并在细胞测试中抑制了酶.
- 抑制剂成功地通过纯化的CES2阻止了CPT-11转化.
- 前五种抑制剂保护了PDAC细胞免受CPT-11介导的细胞死亡.
- 三种抑制剂表现出具有高亲和力的紧密结合机制.
结论:
- 已经确定了新的选择性小分子CES2抑制剂.
- 这些抑制剂在体外和细胞内有效地阻止CPT-11转化为SN-38.
- 已识别的抑制剂在保护CPT-11毒性方面表现有前途,并且需要对PDAC治疗进行进一步的研究.
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