TY - JOUR T1 - Neurodegeneration in a Transgenic Mouse Model of Multiple System Atrophy Is Associated with Altered Expression of Oligodendroglial-Derived Neurotrophic Factors JF - The Journal of Neuroscience JO - J. Neurosci. SP - 6236 LP - 6246 DO - 10.1523/JNEUROSCI.0567-10.2010 VL - 30 IS - 18 AU - Kiren Ubhi AU - Edward Rockenstein AU - Michael Mante AU - Chandra Inglis AU - Anthony Adame AU - Christina Patrick AU - Kristen Whitney AU - Eliezer Masliah Y1 - 2010/05/05 UR - http://www.jneurosci.org/content/30/18/6236.abstract N2 - Multiple system atrophy (MSA) is a neurodegenerative disorder characterized by striatonigral degeneration and olivo-pontocerebellar atrophy. Neuronal degeneration is accompanied by primarily oligodendrocytic accumulation of α-synuclein (αsyn) as opposed to the neuronal inclusions more commonly found in other α-synucleinopathies such as Parkinson's disease. It is unclear how αsyn accumulation in oligodendrocytes may lead to the extensive neurodegeneration observed in MSA; we hypothesize that the altered expression of oligodendrocyte-derived neurotrophic factors by αsyn may be involved. In this context, the expression of a number neurotrophic factors reportedly expressed by oligodendrocytes [glial-derived neurotrophic factor (GDNF), brain-derived neurotrophic factor (BDNF), and insulin-like growth factor 1 (IGF-1), as well as basic fibroblast growth factor 2 (bFGF2), reportedly astrocyte derived] were examined in transgenic mouse models expressing human αsyn (hαsyn) under the control of either neuronal (PDGFβ or mThy1) or oligodendrocytic (MBP) promoters. Although protein levels of BDNF and IGF-1 were altered in all the αsyn transgenic mice regardless of promoter type, a specific decrease in GDNF protein expression was observed in the MBP-hαsyn transgenic mice. Intracerebroventricular infusion of GDNF improved behavioral deficits and ameliorated neurodegenerative pathology in the MBP-hαsyn transgenic mice. Consistent with the studies in the MBP-hαsyn transgenic mice, analysis of GDNF expression levels in human MSA samples demonstrated a decrease in the white frontal cortex and to a lesser degree in the cerebellum compared with controls. These results suggest a mechanism in which αsyn expression in oligodendrocytes impacts on the trophic support provided by these cells for neurons, perhaps contributing to neurodegeneration. ER -