Blood:水杨酸盐可增强CRM1抑制剂的抗肿瘤活性

2020-11-16 MedSci原创 MedSci原创

染色体区域维持蛋白1(CRM1)介导蛋白质从细胞核输出,是抗癌治疗的新靶点。KPT-330(Selinexor)是CRM1的第一类抑制剂,最近被批准用于复发性多发性骨髓瘤和弥漫性大B细胞淋巴瘤,但其广

染色体区域维持蛋白1(CRM1)介导蛋白质从细胞核输出,是抗癌治疗的新靶点。KPT-330(Selinexor)是CRM1的第一类抑制剂,最近被批准用于复发性多发性骨髓瘤和弥漫性大B细胞淋巴瘤,但其广泛应用受到它的巨大毒性的限制。

KPT-330+CS增强CRM1抑制剂的抗肿瘤作用

Abeykoon等发现水杨酸盐通过将作用机制扩展到抑制CRM1之外,显著增强了CRM1抑制剂的抗肿瘤活性。Selinexor与水杨酸盐联合使用时,能够以更低的剂量靶向治疗一系列的血液肿瘤,而且还能减轻临床不良反应。

KPT-330+CS显示出抗肿瘤活性且无明显器官毒性

水杨酸胆碱(CS)和低剂量KPT-330(K+CS)在体内/外对高危血液恶性肿瘤和实体肿瘤均有较强的广谱活性。与恶性细胞相比,K+CS组合对非恶性细胞无毒性,对小鼠正常器官无毒性。

KPT-330+CS显著改善在患者样本中的抗肿瘤活性

在机制上,与单独使用KPT-330相比,K+CS可抑制CRM1、RAD51和胸苷酸合成酶蛋白的表达,从而能够更有效地抑制CRM1介导的核输出、DNA损伤修复,减少嘧啶合成,使细胞周期停滞于S期,最终导致细胞凋亡。此外,加用PARP抑制剂可进一步增强K+CS的抗肿瘤作用。

综上,K+CS代表了治疗多种类型血液癌症的一种新的疗法,并将促进未来的研究,以利用DNA损伤修复和核质转运来治疗癌症。

原始出处:

Abeykoon Jithma,Wu Xiaosheng,Nowakowski Kevin Edward et al. CRM1 inhibitor anti-tumor activity is enhanced with salicylates by S-phase arrest and impaired DNA-damage repair. Blood, 2020, undefined: undefined.

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    2021-01-20 jklm09
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    2020-11-17 ms1000001586038468

    👍

    0

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    2020-11-16 147a80d2m04暂无昵称

    学习了

    0

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