在T细胞急性淋巴细胞白血病中,PTEN损失使人对酸盐合成酶IMPDH产生依赖

在T细胞急性淋巴细胞白血病中,PTEN损失使人对酸盐合成酶IMPDH产生依赖

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Updated: Jan 13, 2026

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Rayees A Padder¹, Thu Le Le², Emily Hyde³

¹Center for Advanced Biotechnology and Medicine, Piscataway, NJ 08854.

bioRxiv : the preprint server for biology

|January 7, 2026

概括

在T细胞急性淋巴细胞白血病 (T-ALL) 中失去PTEN会造成代谢脆弱性. 用已批准的药物向IMPDH可以选择性地杀死T-ALL细胞,并改善小鼠模型中的存活率.

科学领域:

在瘤学瘤学.
分子生物学分子生物学
代谢途径代谢途径

背景情况:

在T细胞急性淋巴细胞白血病 (T-ALL) 中,PTEN瘤抑制剂的丧失是常见的,并且与预后不佳相关.
失去PTEN会激活AKT/mTORC1信号,从而推动白血病细胞的增殖.

研究的目的:

为了确定PTEN缺乏T-ALL的治疗漏洞.
调查因诺辛5'-单酸脱酶 (IMPDH) 在PTEN损失T-ALL中的作用.
在T-ALL模型中评估IMPDH抑制剂的疗效.

主要方法:

评估了PTEN缺乏的T-ALL细胞在生长和活力方面对IMPDH的依赖.
利用了T-ALL.的遗传和异种移植小鼠模型.
使用临床批准的IMPDH抑制剂.
分析了DNA复制压力和DNA损伤诱导.

主要成果:

失去PTEN的T-ALL细胞对IMPDH的生存依赖,这与持续的mTORC1信号传递有关.
IMPDH抑制剂在体外和体内选择性地杀死PTEN缺乏的T-ALL细胞.
用IMPDH抑制剂治疗导致DNA复制压力和DNA损伤.
与mTORC1抑制剂相比,IMPDH抑制在PTEN缺乏T-ALL.ALL中表现出更高的疗效.

结论:

缺乏PTEN的T-ALL呈现了一个可向的代谢脆弱性,以IMPDH为中心.
临床批准的IMPDH抑制剂在治疗PTEN损失T-ALL方面表现有前途.
重用IMPDH抑制剂可能为T-ALL.提供一种新的治疗策略.

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