101. Promethazine protects against 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine neurotoxicity
- Author
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Carine Cleren, Anatoly A. Starkov, Noel Y. Calingasan, Beverly J. Lorenzo, Junya Chen, and M. Flint Beal
- Subjects
Promethazine ,MPTP ,MPP+ ,Parkinson ,Neuroprotection ,Mitochondria ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Promethazine (PMZ) is an FDA-approved antihistaminergic drug that was identified as a potentially neuroprotective compound in the NINDS screening program. PMZ accumulates in brain mitochondria in vivo and inhibits Ca2+-induced mitochondrial permeability transition pore (PTP) in rat liver mitochondria in vitro. We hypothesized that PMZ may have a protective effect in a mitochondrial toxin model of Parkinson's disease (PD). Mice treated with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) sustained a significant loss of dopaminergic neurons within the SNpc that was strongly attenuated by PMZ treatment. However, neither striatal MPP+ concentrations nor MPTP-induced inhibition of mitochondrial complex I were affected by PMZ treatment. In isolated mouse brain mitochondria, PMZ partially prevented and reversed MPP+-induced depolarization of membrane potential and inhibited the Ca2+-induced PTP in brain mitochondria. The sum of data indicates that PMZ is a strong neuroprotective agent capable of protecting dopaminergic neurons against MPTP toxicity in vivo.
- Published
- 2005
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