PRPS1-mediated purine biosynthesis is critical for pluripotent stem cell survival and stemness.

PRPS1-mediated purine biosynthesis is critical for pluripotent stem cell survival and stemness.
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PRPS1介导的嘌呤生物合成对于多能干细胞的存活和干性至关重要

DOI:
10.18632/aging.202372
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发表时间:
2021-01-20
期刊:
Aging
影响因子:
--
通讯作者:
Li Y
Li Y
中科院分区:
其他
文献类型:
--
作者:
Yang Y;Song L;Huang X;Feng Y;Zhang Y;Liu Y;Li S;Zhan Z;Zheng L;Feng H;Li Y

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多能干细胞(PSCs)与典型分化细胞相比,具有独特的能量和生物合成代谢。然而,PSCs的代谢谱及其潜在机制仍不清楚。在此,我们报道了PSCs的代谢谱,并确定嘌呤合成酶——磷酸核糖焦磷酸合成酶1/2(PRPS1/2)对PSCs的干性和存活至关重要。超高效液相色谱/质谱(UHPLC - MS)分析显示,PSCs中嘌呤合成中间代谢物水平高于体细胞。PRPS1/2的异位表达并未改善PSCs中的嘌呤生物合成、耐药性或干性。然而,PRPS1的敲除导致PSCs的DNA损伤和细胞凋亡。PRPS2的缺失减弱了PSCs的干性并促进了PSCs的分化。我们的研究结果表明,PRPS1/2介导的嘌呤生物合成对多能干细胞的干性和存活至关重要。
Pluripotent stem cells (PSCs) have a unique energetic and biosynthetic metabolism compared with typically differentiated cells. However, the metabolism profiling of PSCs and its underlying mechanism are still unclear. Here, we report PSCs metabolism profiling and identify the purine synthesis enzymes, phosphoribosyl pyrophosphate synthetase 1/2 (PRPS1/2), are critical for PSCs stemness and survival. Ultra-high performance liquid chromatography/mass spectroscopy (UHPLC-MS) analysis revealed that purine synthesis intermediate metabolite levels in PSCs are higher than that in somatic cells. Ectopic expression of PRPS1/2 did not improve purine biosynthesis, drug resistance, or stemness in PSCs. However, knockout of PRPS1 caused PSCs DNA damage and apoptosis. Depletion of PRPS2 attenuated PSCs stemness and assisted PSCs differentiation. Our finding demonstrates that PRPS1/2-mediated purine biosynthesis is critical for pluripotent stem cell stemness and survival.
DOI: 10.1016/j.stem.2009.07.003
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