Poly(ADP-ribose) drives pathologic α-synuclein neurodegeneration in Parkinson's disease.

Poly(ADP-ribose) drives pathologic α-synuclein neurodegeneration in Parkinson's disease.
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DOI:
10.1126/science.aat8407
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发表时间:
2018-11-02
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Dawson VL
Dawson VL
中科院分区:
其他
文献类型:
--
作者:
Kam TI;Mao X;Park H;Chou SC;Karuppagounder SS;Umanah GE;Yun SP;Brahmachari S;Panicker N;Chen R;Andrabi SA;Qi C;Poirier GG;Pletnikova O;Troncoso JC;Bekris LM;Leverenz JB;Pantelyat A;Ko HS;Rosenthal LS;Dawson TM;Dawson VL

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α-突触核蛋白(α-synuclein,α-syn)的病理性积聚和聚集是帕金森病(Parkinson's disease,PD)的基础。病理性α-syn引起PD神经变性的分子机制尚不清楚。我们发现,病理性α-syn激活聚腺苷二磷酸核糖(PAR)聚合酶-1(PARP-1),PAR的产生加速了病理性α-syn的形成,导致细胞通过假死而死亡。PARP抑制剂或PARP-1基因缺失可预防病理性α-syn毒性。在前馈回路中,PAR将病理性α-syn转化为毒性更强的菌株。帕金森病患者的脑脊液和大脑中PAR水平升高,表明PARP激活在帕金森病发病机制中起作用。因此,旨在抑制PARP-1激活的策略有望作为疾病修饰疗法,以防止PD中多巴胺(DA)神经元的损失。聚(ADP-核糖)(PAR)介导并加速帕金森病的神经变性。
The pathologic accumulation and aggregation of α-synuclein (α-syn) underlies Parkinson’s disease (PD). The molecular mechanisms by which pathologic α-syn causes neurodegeneration in PD is not known. Here we found that pathologic α-syn activates poly (ADP-ribose) (PAR) polymerase-1 (PARP-1) and PAR generation accelerates the formation of pathologic α-syn resulting in cell death via parthanatos. PARP inhibitors or genetic deletion of PARP-1 prevented pathologic α-syn toxicity. In a feed-forward loop, PAR converted pathologic α-syn to a more toxic strain. PAR levels were increased in the cerebral spinal fluid and brains of PD patients suggesting that PARP activation plays a role in PD pathogenesis. Thus, strategies aimed at inhibiting PARP-1 activation could hold promise as a disease modifying therapy to prevent the loss of dopamine (DA) neurons in PD. Poly (ADP-ribose) (PAR) mediates and accelerates neurodegeneration in Parkinson’s disease.
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