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Why does PGC-1α overexpression paradoxically increase MPTP toxicity despite enhancing antioxidant defenses?
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neurodegeneration
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PGC-1α is known to enhance mitochondrial function and antioxidant responses, yet overexpression increased susceptibility to MPTP-induced neuronal death. This contradicts the expected neuroprotective role and challenges PGC-1α as a therapeutic target in PD.
Gap type: contradiction
Source paper: Pgc-1α overexpression downregulates Pitx3 and increases susceptibility to MPTP toxicity associated with decreased Bdnf. (2012, PloS one, PMID:23145024)