Neuroprotective Properties of a Novel Non-Thiazoledinedione Partial PPAR-γAgonist against MPTP

Christine R. Swanson, Eric Du, Delinda A. Johnson, Jeffrey A. Johnson, Marina E. Emborg
2013 PPAR Research  
Activation of the peroxisome proliferator activated receptor-gamma (PPAR)-γis proposed as a neuroprotective strategy to treat neurodegenerative disorders. In this study, we examined if LSN862 (LSN), a novel non-thiazoledinedione partial PPAR-γagonist, was neuroprotective in a mouse model of Parkinson's disease (PD) and assessed possible mechanisms of action. LSN (3, 10, or 30 mg/kg) or vehicle was orally administered daily to C57BL/6 and antioxidant response element-human placental alkaline
more » ... phatase (ARE-hPAP) reporter mice 3 days prior to 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP; 30 mg/kg, i.p. × 5 days) or PBS administration. LSN elicited a dose-dependent preservation of dopaminergic nigrostriatal innervation that was not associated with inhibition of MPTP metabolism or activation of Nrf2-ARE, although changes in NQO1 and SOD2 mRNA were observed. A significant dose-dependent downregulation in MAC-1 and GFAP positive cells was observed in MPTP + LSN-treated mice as well as significant downregulation of mRNA expression levels of these inflammatory markers. MPTP-induced increases in PPAR-γand PGC1αexpression were ameliorated by LSN dosing. Our results demonstrate that oral administration of LSN is neuroprotective against MPTP-induced neurodegeneration, and this effect is associated with downregulation of neuroinflammation, decreased oxidative stress, and modulation of PPAR-γand PGC1αexpression. These results suggest that LSN can be a candidate alternative non-thiazoledinedione partial PPAR-γagonist for neuroprotective treatment of PD.
doi:10.1155/2013/582809 pmid:24223584 pmcid:PMC3808726 fatcat:4uue7wc4lvdw5j5vqjgixvjb3a