Pigment Epithelium-Derived Factor Plays a Role in Alzheimer's Disease by Negatively Regulating Aβ42.

Pigment Epithelium-Derived Factor Plays a Role in Alzheimer's Disease by Negatively Regulating Aβ42.
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色素上皮衍生因子通过负向调节 A beta 42 在阿尔茨海默病中发挥作用

DOI:
10.1007/s13311-018-0628-1
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发表时间:
2018-07
期刊:
Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics
影响因子:
--
通讯作者:
Gao G
Gao G
中科院分区:
其他
文献类型:
--
作者:
Huang M;Qi W;Fang S;Jiang P;Yang C;Mo Y;Dong C;Li Y;Zhong J;Cai W;Yang Z;Zhou T;Wang Q;Yang X;Gao G

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阿尔茨海默病(AD)是痴呆症最常见的原因。色素上皮衍生因子(PEDF)是一种独特的神经营养蛋白,随着年龄的增长而减少。之前的报道对于 AD 患者中 PEDF 浓度是否发生改变存在争议。此外,PEDF 对 AD 的影响尚未有记录。在这里,我们测试了 31 名 AD 患者和 271 名正常对照者的血清样本。我们发现,与中青年对照组的 PEDF 水平相比,老年对照组的 PEDF 水平降低,AD 患者的 PEDF 水平更低。此外,我们还证实,与衰老加速小鼠抵抗 1 (SAMR1) 对照品系小鼠相比,衰老加速小鼠易感 8 (SAMP8) 品系小鼠中的 PEDF 表达要低得多,β 淀粉样蛋白 (Aβ)42 表达要高得多。因此,在 PEDF 敲除 (KO) 小鼠中也观察到高水平的 Aβ42。 PEDF 显着降低了 Morris 水迷宫 (MWM) 中的认知障碍,并显着下调了 SAMP8 小鼠中的 Aβ42。从机制上讲,PEDF 通过抑制 c-Jun N 末端激酶 (JNK) 途径下调早老素-1 (PS1) 表达。总而言之,我们的研究结果首次证明 PEDF 对 Aβ42 负向调节,并且随着衰老而出现的 PEDF 缺乏可能在 AD 的发展中发挥着至关重要的作用。本文的在线版本 (10.1007/s13311-018-0628-1) 包含补充材料,可供授权用户使用。
Alzheimer’s disease (AD) is the most common cause of dementia. Pigment epithelium-derived factor (PEDF), a unique neurotrophic protein, decreases with aging. Previous reports have conflicted regarding whether the PEDF concentration is altered in AD patients. In addition, the effect of PEDF on AD has not been documented. Here, we tested serum samples of 31 AD patients and 271 normal controls. We found that compared to PEDF levels in young and middle-aged control subjects, PEDF levels were reduced in old-aged controls and even more so in AD patients. Furthermore, we verified that PEDF expression was much lower and amyloid β-protein (Aβ)42 expression was much higher in senescence-accelerated mouse prone 8 (SAMP8) strain mice than in senescence-accelerated mouse resistant 1 (SAMR1) control strain mice. Accordingly, high levels of Aβ42 were also observed in PEDF knockout (KO) mice. PEDF notably reduced cognitive impairment in the Morris water maze (MWM) and significantly downregulated Aβ42 in SAMP8 mice. Mechanistically, PEDF downregulated presenilin-1 (PS1) expression by inhibiting the c-Jun N-terminal kinase (JNK) pathway. Taken together, our findings demonstrate for the first time that PEDF negatively regulates Aβ42 and that PEDF deficiency with aging might play a crucial role in the development of AD. The online version of this article (10.1007/s13311-018-0628-1) contains supplementary material, which is available to authorized users.
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