Abstract
Peroxisome proliferator-activated receptor-γ (PPAR-γ) is one of the most studied nuclear receptor since its identification as a target to treat metabolic and neurological diseases. In addition to exerting anti-inflammatory and neuroprotective effects, PPAR-γ agonists, such as the insulin-sensitizing drug pioglitazone, promote the differentiation of oligodendrocytes (OLs), the myelin-forming cells of the central nervous system (CNS). In addition, PPAR-γ agonists increase OL mitochondrial respiratory chain activity and OL's ability to respond to environmental signals with oscillatory Ca2+ waves. Both OL maturation and oscillatory Ca2+ waves are prevented by the mitochondrial inhibitor rotenone and restored by PPAR-γ agonists, suggesting that PPAR-γ promotes myelination through mechanisms involving mitochondria.
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