RT Journal Article
T1 Complement component 3 (C3) expression in the hippocampus after excitotoxic injury: role of C/EBPβ.
A1 Hernandez-Encinas, Elena
A1 Aguilar-Morante, Diana
A1 Morales-Garcia, Jose A
A1 Gine, Elena
A1 Sanz-SanCristobal, Marina
A1 Santos, Angel
A1 Perez-Castillo, Ana
K1 C/EBPβ
K1 C3
K1 Excitotoxicity
K1 Neurodegeneration
K1 Neuroinflammation
AB The CCAAT/enhancer-binding protein β (C/EBPβ) is a transcription factor implicated in the control of proliferation, differentiation, and inflammatory processes mainly in adipose tissue and liver; although more recent results have revealed an important role for this transcription factor in the brain. Previous studies from our laboratory indicated that CCAAT/enhancer-binding protein β is implicated in inflammatory process and brain injury, since mice lacking this gene were less susceptible to kainic acid-induced injury. More recently, we have shown that the complement component 3 gene (C3) is a downstream target of CCAAT/enhancer-binding protein β and it could be a mediator of the proinflammatory effects of this transcription factor in neural cells. Adult male Wistar rats (8-12 weeks old) were used throughout the study. C/EBPβ+/+ and C/EBPβ-/- mice were generated from heterozygous breeding pairs. Animals were injected or not with kainic acid, brains removed, and brain slices containing the hippocampus analyzed for the expression of both CCAAT/enhancer-binding protein β and C3. In the present work, we have further extended these studies and show that CCAAT/enhancer-binding protein β and C3 co-express in the CA1 and CA3 regions of the hippocampus after an excitotoxic injury. Studies using CCAAT/enhancer-binding protein β knockout mice demonstrate a marked reduction in C3 expression after kainic acid injection in these animals, suggesting that indeed this protein is regulated by C/EBPβ in the hippocampus in vivo. Altogether these results suggest that CCAAT/enhancer-binding protein β could regulate brain disorders, in which excitotoxic and inflammatory processes are involved, at least in part through the direct regulation of C3.
YR 2016
FD 2016-10-21
LK http://hdl.handle.net/10668/10553
UL http://hdl.handle.net/10668/10553
LA en
DS RISalud
RD Apr 4, 2025