Hippocampal subfield vulnerability to α-synuclein pathology precedes neurodegeneration and cognitive dysfunction.
Hippocampal subfield vulnerability to α-synuclein pathology precedes neurodegeneration and cognitive dysfunction.
复制标题
海马亚区对α-突触核蛋白病理学的脆弱性先于神经变性和认知功能障碍。
DOI:
10.1101/2023.04.12.536572
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Moore,DarrenJ
中科院分区:
文献类型:
--
作者:
Dues,DylanJ;Nguyen,AnPhuTran;Becker,Katelyn;Ma,Jiyan;Moore,DarrenJ
Cognitive dysfunction is a salient feature of Parkinson’s disease (PD) and Dementia with Lewy bodies (DLB). The onset of dementia reflects the spread of Lewy pathology throughout forebrain structures. The mere presence of Lewy pathology, however, provides limited indication of cognitive status. Thus, it remains unclear whether Lewy pathology is the de facto substrate driving cognitive dysfunction in PD and DLB. Through application of α-synuclein fibrils in vivo, we sought to examine the influence of pathologic inclusions on cognition. Following stereotactic injection of α-synuclein fibrils within the mouse forebrain, we measured the burden of α-synuclein pathology at 1-, 3-, and 6-months post-injection within subregions of the hippocampus and cortex. Under this paradigm, the hippocampal CA2/3 subfield was especially susceptible to α-synuclein pathology. Strikingly, we observed a drastic reduction of pathology in the CA2/3 subfield across time-points, consistent with the consolidation of α-synuclein pathology into dense somatic inclusions followed by neurodegeneration. Silver-positive degenerating neurites were observed prior to neuronal loss, suggesting that this might be an early feature of fibril-induced neurotoxicity and a precursor to neurodegeneration. Critically, mice injected with α-synuclein fibrils developed progressive deficits in spatial learning and memory. These findings support that the formation of α-synuclein inclusions in the mouse forebrain precipitate neurodegenerative changes that recapitulate features of Lewy-related cognitive dysfunction.
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影响因子:
19.6
作者:
ARIEFF, AI;GUISADO, R
通讯作者:
GUISADO, R
影响因子:
15.9
作者:
LIEN, YHH;SHAPIRO, JI;CHAN, L
通讯作者:
CHAN, L
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作者:
A. Lockwood
通讯作者:
A. Lockwood
影响因子:
2.9
作者:
Difat E. Jakubovicz;S. Grinstein;A. Klip
通讯作者:
A. Klip
影响因子:
6.1
作者:
LOHR, JW;MCREYNOLDS, J;ACARA, M
通讯作者:
ACARA, M