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2015 ; 10
(10
): e0140248
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Inflammation Induces TDP-43 Mislocalization and Aggregation
#MMPMID26444430
Correia AS
; Patel P
; Dutta K
; Julien JP
PLoS One
2015[]; 10
(10
): e0140248
PMID26444430
show ga
TAR DNA-binding protein 43 (TDP-43) is a major component in aggregates of
ubiquitinated proteins in amyotrophic lateral sclerosis (ALS) and frontotemporal
lobar degeneration (FTLD). Here we report that lipopolysaccharide (LPS)-induced
inflammation can promote TDP-43 mislocalization and aggregation. In culture,
microglia and astrocytes exhibited TDP-43 mislocalization after exposure to LPS.
Likewise, treatment of the motoneuron-like NSC-34 cells with TNF-alpha (TNF-?)
increased the cytoplasmic levels of TDP-43. In addition, the chronic
intraperitoneal injection of LPS at a dose of 1mg/kg in TDP-43(A315T) transgenic
mice exacerbated the pathological TDP-43 accumulation in the cytoplasm of spinal
motor neurons and it enhanced the levels of TDP-43 aggregation. These results
suggest that inflammation may contribute to development or exacerbation of TDP-43
proteinopathies in neurodegenerative disorders.