Brain injury accelerates the onset of a reversible age-related microglial phenotype associated with inflammatory neurodegeneration.
Brain injury accelerates the onset of a reversible age-related microglial phenotype associated with inflammatory neurodegeneration.
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脑损伤加速了与炎症性神经退行性相关的可逆年龄相关的小胶质细胞表型的发作。
DOI:
10.1126/sciadv.add1101
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发表时间:
2023-03-10
期刊:
影响因子:
13.6
通讯作者:
中科院分区:
文献类型:
--
作者:
Lipofuscin is an autofluorescent (AF) pigment formed by lipids and misfolded proteins, which accumulates in postmitotic cells with advanced age. Here, we immunophenotyped microglia in the brain of old C57BL/6 mice (>18 months old) and demonstrate that in comparison to young mice, one-third of old microglia are AF, characterized by profound changes in lipid and iron content, phagocytic activity, and oxidative stress. Pharmacological depletion of microglia in old mice eliminated the AF microglia following repopulation and reversed microglial dysfunction. Age-related neurological deficits and neurodegeneration after traumatic brain injury (TBI) were attenuated in old mice lacking AF microglia. Furthermore, increased phagocytic activity, lysosomal burden, and lipid accumulation in microglia persisted for up to 1 year after TBI, were modified by APOE4 genotype, and chronically driven by phagocyte-mediated oxidative stress. Thus, AF may reflect a pathological state in aging microglia associated with increased phagocytosis of neurons and myelin and inflammatory neurodegeneration that can be further accelerated by TBI. Traumatic brain injury-induced oxidative stress accelerates onset of a microglial phenotype seen in old age.
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影响因子:
9
作者:
Fu B;Yin S;Lin X;Shi L;Wang Y;Zhang S;Zhao Q;Li Z;Yang Y;Wu H
通讯作者:
Wu H
DOI:
10.1073/pnas.1922788117
发表时间:
2020-09-22
影响因子:
11.1
作者:
Lei F;Cui N;Zhou C;Chodosh J;Vavvas DG;Paschalis EI
通讯作者:
Paschalis EI
影响因子:
9.3
作者:
通讯作者:
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影响因子:
8.8
作者:
Hu Y;Fryatt GL;Ghorbani M;Obst J;Menassa DA;Martin-Estebane M;Muntslag TAO;Olmos-Alonso A;Guerrero-Carrasco M;Thomas D;Cragg MS;Gomez-Nicola D
通讯作者:
Gomez-Nicola D
影响因子:
4.2
作者:
Doran, Sarah J.;Ritzel, Rodney M.;Loane, David J.
通讯作者:
Loane, David J.