Nat Commun:双重靶向多胺合成和摄取:弥漫性内生性脑桥胶质瘤的潜在治疗策略

2021-02-14 xiaozeng MedSci原创

弥漫性内生性脑桥胶质瘤(DIPG)是一种不可治愈的侵袭性极强的恶性脑肿瘤,患者的中位生存期不到一年,5年生存率不到1%,是儿童中最常见的高级别神经胶质瘤。

弥漫性内生性脑桥胶质瘤(DIPG)是一种不可治愈的侵袭性极强的恶性脑肿瘤,患者的中位生存期不到一年,5年生存率不到1%,是儿童中最常见的高级别神经胶质瘤。该疾病是致命的,目前并没有有效的治疗方法,且仍是儿童期脑瘤相关死亡的主要原因。

尽管关于该疾病目前已开展了采用不同治疗策略的250多次临床试验,但DIPG的不良预后并未得到改善,局部放疗仍是该病的标准治疗策略。既往研究显示,具有低毒性和穿越血脑屏障能力的新疗法的发展将为DIPG患者提供新的治疗选择。

脑肿瘤中的多胺合成及代谢的相关基因

多胺是一种小的有机阳离子聚合物,由于其在包括DNA复制、翻译和细胞增殖在内的多种细胞过程中发挥着至关重要的作用,因此也目前也有许多研究探索其在侵袭性肿瘤中的功能。ODC1(鸟氨酸脱羧酶1)是多胺合成中的限速酶,且能够被DFMO(二氟甲基鸟氨酸)不可逆地抑制。

DFMO和AMXT 1501联合治疗的疗效分析

在该研究中,研究人员发现在DIPG中多胺的合成被上调,并导致DFMO敏感性的升高。研究显示,DIPG细胞能够通过上调多胺转运蛋白SLC3A2的表达来补偿对ODC1的抑制作用。采用多胺转运蛋白抑制剂AMXT 1501进行治疗可降低DIPG细胞对多胺的摄取,且AMXT 1501和DFMO的联合给药可产生有效的体外活性,并在三种侵袭性DIPG原位动物模型中显示出显著延长生存期的作用。


总而言之,以上的这些研究结果证明了双重靶向多胺合成和摄取或可成为DIPG的潜在的治疗策略。


原始出处:

Khan, A., Gamble, L.D., Upton, D.H. et al. Dual targeting of polyamine synthesis and uptake in diffuse intrinsic pontine gliomas. Nat Commun 12, 971 (12 February 2021).

 

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    2021-05-10 waiwai3043
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    2021-08-18 amy0560
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    2021-03-25 liuli5079
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    2021-02-15 carrotlyl

    好消息

    0

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