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Войти в исследования Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
Microglial CLEC7A restrains amyloid beta plaque pathology in a mouse model of Alzheimer's disease.
СтатьяПоддержка NIH: внешняя программаНазвание и аннотация: Перевод пока не подготовлен
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Mangalmurti Aman, Zengeler Kristine E, Hollis Ava, Golden Emily, Riddlemoser Gabrielle, Lukens John R
Аннотация
INTRODUCTION: CLEC7A is a surface receptor that is highly upregulated on microglia in many Alzheimer's disease (AD) models. Little is known about the role that microglial CLEC7A signaling plays in AD-related pathogenesis.
METHODS: We utilized an inducible, central nervous system (CNS) macrophage-specific knockout of Clec7a to evaluate the role of CLEC7A in the 5xFAD mouse model of AD at 5 months of age. We used immunofluorescence microscopy, single-nuclei RNA sequencing, along with biochemical assays, to evaluate plaque burden, microglial activity, and neuronal health.
RESULTS: CNS macrophage-targeted deletion of CLEC7A in 5xFAD mice led to a twofold increase in plaque burden, exacerbated neuritic dystrophy, and altered the expression of neuronal health genes, but did not appreciably impact microglial activation, plaque engulfment, or disease-associated microglia acquisition.
DISCUSSION: These findings identify protective roles for CLEC7A in AD-related amyloidosis and suggest that CLEC7A-targeting therapeutics may offer promising strategies for treatment of AD.
HIGHLIGHTS: Conditional loss of CLEC7A in central nervous system (CNS) macrophages of 5xFAD mice results in increased amyloid beta deposition. Loss of CLEC7A does not alter the disease-associated microglia transcriptional program or affect the recruitment of microglia to plaque surfaces. Exacerbation of amyloid deposition with loss of CNS-macrophage CLEC7A is associated with worsened neuronal health highlighted by increased neuritic dystrophy.
METHODS: We utilized an inducible, central nervous system (CNS) macrophage-specific knockout of Clec7a to evaluate the role of CLEC7A in the 5xFAD mouse model of AD at 5 months of age. We used immunofluorescence microscopy, single-nuclei RNA sequencing, along with biochemical assays, to evaluate plaque burden, microglial activity, and neuronal health.
RESULTS: CNS macrophage-targeted deletion of CLEC7A in 5xFAD mice led to a twofold increase in plaque burden, exacerbated neuritic dystrophy, and altered the expression of neuronal health genes, but did not appreciably impact microglial activation, plaque engulfment, or disease-associated microglia acquisition.
DISCUSSION: These findings identify protective roles for CLEC7A in AD-related amyloidosis and suggest that CLEC7A-targeting therapeutics may offer promising strategies for treatment of AD.
HIGHLIGHTS: Conditional loss of CLEC7A in central nervous system (CNS) macrophages of 5xFAD mice results in increased amyloid beta deposition. Loss of CLEC7A does not alter the disease-associated microglia transcriptional program or affect the recruitment of microglia to plaque surfaces. Exacerbation of amyloid deposition with loss of CNS-macrophage CLEC7A is associated with worsened neuronal health highlighted by increased neuritic dystrophy.