detalle del documento
IDENTIFICACIÓN

doi:10.1186/s40478-021-01239-x...

Autor
Hunter, Mandana Spiller, Krista J. Dominique, Myrna A. Xu, Hong Hunter, Francis W. Fang, Terry C. Canter, Rebecca G. Roberts, Christopher J. Ransohoff, Richard M. Trojanowski, John Q. Lee, Virginia M.-Y.
Langue
en
Editor

BioMed Central

Categoría

Neurology

Año

2021

fecha de cotización

8/12/2022

Palabras clave
microglia amyotrophic lateral sclerosis als tdp-43 proteinopathy neuroinflammation neurodegeneration rnls8 phagocytosis recovery spinal cord expression associated genes differentially expressed progression microglia tdp-43 recovery microglial
Métrico

Resumen

The microglial reaction is a hallmark of neurodegenerative conditions, and elements thereof may exert differential effects on disease progression, either worsening or ameliorating severity.

In amyotrophic lateral sclerosis (ALS), a syndrome characterized by cytoplasmic aggregation of TDP-43 protein and atrophy of motor neurons in the cortex and spinal cord, the transcriptomic signatures of microglia during disease progression are incompletely understood.

Here, we performed longitudinal RNAseq analysis of cortical and spinal cord microglia from rNLS8 mice, in which doxycycline-regulatable expression of human TDP-43 (hTDP-43) in the cytoplasm of neurons recapitulates many features of ALS.

Transgene suppression in rNLS8 mice leads to functional, anatomical and electrophysiological resolution that is dependent on a microglial reaction that is concurrent with recovery rather than disease onset.

We identified basal differences between the gene expression profiles of microglia dependent on localization in spinal cord or cortex.

Microglia subjected to chronic hTDP-43 overexpression demonstrated transcriptomic changes in both locations.

We noted strong upregulation of Apoe , Axl , Cd63 , Clec7a , Csf1 , Cst7 , Igf1 , Itgax , Lgals3 , Lilrb4 , Lpl and Spp1 during late disease and recovery.

Importantly, we identified a distinct suite of differentially expressed genes associated with each phase of disease progression and recovery.

Differentially expressed genes were associated with chemotaxis, phagocytosis, inflammation, and production of neuroprotective factors.

These data provide new insights into the microglial reaction in TDP-43 proteinopathy.

Genes differentially expressed during progression and recovery may provide insight into a unique instance in which the microglial reaction promotes functional recovery after neuronal insult.

Hunter, Mandana,Spiller, Krista J.,Dominique, Myrna A.,Xu, Hong,Hunter, Francis W.,Fang, Terry C.,Canter, Rebecca G.,Roberts, Christopher J.,Ransohoff, Richard M.,Trojanowski, John Q.,Lee, Virginia M.-Y., 2021, Microglial transcriptome analysis in the rNLS8 mouse model of TDP-43 proteinopathy reveals discrete expression profiles associated with neurodegenerative progression and recovery, BioMed Central

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