Glutathione Peroxidase 4 is associated with Neuromelanin in Substantia Nigra and Dystrophic Axons in Putamen of Parkinson's brain |
| |
Authors: | Frederick P Bellinger Miyoko T Bellinger Lucia A Seale Andrea S Takemoto Arjun V Raman Takanori Miki Amy B Manning-Boğ Marla J Berry Lon R White G Webster Ross |
| |
Institution: | 1. Center for Translational Research in Neurodegenerative Disease, College of Medicine, University of Florida, 1275 Center Drive, PO Box #100159, FL-32610, Gainesville, USA 2. Department of Neuroscience, Mayo Clinic College of Medicine, 4500 San Pablo Rd S, 32224, Jacksonville, FL, USA
|
| |
Abstract: | Fibrillar amyloid β (fAβ) peptide is the major component of Aβ plaques in the brains of Alzheimer's disease (AD) patients. Inflammatory mediators have previously been proposed to be drivers of Aβ pathology in AD patients by increasing amyloidogenic processing of APP and promoting Aβ accumulation, but recent data have shown that expression of various inflammatory cytokines attenuates Aβ pathology in mouse models. In an effort to further study the role of different inflammatory cytokines on Aβ pathology in vivo, we explored the effect of murine Tumor Necrosis Factor α (mTNFα) in regulating Aβ accumulation. Recombinant adeno-associated virus serotype 1 (AAV2/1) mediated expression of mTNFα in the hippocampus of 4 month old APP transgenic TgCRND8 mice resulted in significant reduction in hippocampal Aβ burden. No changes in APP levels or APP processing were observed in either mTNFα expressing APP transgenic mice or in non-transgenic littermates. Analysis of Aβ plaque burden in mTNFα expressing mice showed that even after substantial reduction compared to EGFP expressing age-matched controls, the Aβ plaque burden levels of the former do not decrease to the levels of 4 month old unmanipulated mice. Taken together, our data suggests that proinflammatory cytokine expression induced robust glial activation can attenuate plaque deposition. Whether such an enhanced microglial response actually clears preexisting deposits without causing bystander neurotoxicity remains an open question. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|