PI(3,4)P2-mediated cytokinetic abscission prevents early senescence and cataract formation.

PI(3,4)P2-mediated cytokinetic abscission prevents early senescence and cataract formation.
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DOI:
10.1126/science.abk0410
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发表时间:
2021-12-10
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Hirsch E
Hirsch E
中科院分区:
其他
文献类型:
--
作者:
Gulluni F;Prever L;Li H;Krafcikova P;Corrado I;Lo WT;Margaria JP;Chen A;De Santis MC;Cnudde SJ;Fogerty J;Yuan A;Massarotti A;Sarijalo NT;Vadas O;Williams RL;Thelen M;Powell DR;Schueler M;Wiesener MS;Balla T;Baris HN;Tiosano D;McDermott BM Jr;Perkins BD;Ghigo A;Martini M;Haucke V;Boura E;Merlo GR;Buchner DA;Hirsch E

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细胞动力学膜分裂是一个空间和时间调节的过程,需要ESCRT(内体分选复合物运输所需的)-依赖性控制膜重塑的中间体,亚细胞器,确定切割位点。ESCRT功能的改变可导致白内障的发生,但其机制及其与胞质分裂的关系尚不清楚。我们发现晶状体特异性细胞动力学过程需要磷脂酰肌醇-4-磷酸3-激酶催化亚基2α(PI 3 K-C2 α)、其脂质产物PI(3,4)P2(磷脂酰肌醇3,4-二磷酸)和PI(3,4)P2-结合ESCRT-II亚基VPS 36(空泡蛋白分选相关蛋白36)。这些成分的缺失都会导致胞质分裂受损,从而引发鱼类、小鼠和人类的透镜过早衰老。因此,一个进化上保守的途径是细胞类型特异性控制胞质分裂的基础,这有助于通过防止衰老来预防早发性白内障。
Cytokinetic membrane abscission is a spatially and temporally regulated process that requires ESCRT (endosomal sorting complexes required for transport)-–dependent control of membrane remodeling at the midbody, a subcellular organelle that defines the cleavage site. Alteration of ESCRT function can lead to cataract, but the underlying mechanism and its relation to cytokinesis are unclear. We found a lens-specific cytokinetic process that required phosphatidylinositol-4-phosphate 3-kinase catalytic subunit type 2α (PI3K-C2α), its lipid product PI(3,4)P2 (phosphatidylinositol 3,4-bisphosphate), and the PI(3,4)P2-–binding ESCRT-II subunit VPS36 (vacuolar protein-sorting-–associated protein 36). Loss of each of these components led to impaired cytokinesis, triggering premature senescence in the lens of fish, mice, and humans. Thus, an evolutionarily conserved pathway underlies the cell type-–specific control of cytokinesis that helps to prevent early onset cataract by protecting from senescence.
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