Abstract
The authors investigated the protective effects of a novel astrocyte-modulating agent, arundic acid, in a 1-methyl-4-phenyl-1,2,3,6-tetrahyropyridine (MPTP) mouse model of Parkinson’s disease. Male mice received four intraperitoneal (i.p.) injections of MPTP (20 mg/kg) at 2 h intervals. The content of dopamine and its metabolites in the striatum was reduced markedly 7 days after MPTP treatment. The delayed treatment with arundic acid (30 mg/kg, i.p.) administered 3, 4, 5 and 6 days after MPTP treatment did not affect the depletion of dopamine and its metabolites in the striatum. Our immunohistochemical study with anti-tyrosine hydroxylase antibody, anti-neuronal nuclei antibody, anti-glial fibrillary acidic protein antibody, anti-S100β antibody and anti-nestin antibody showed that the delayed treatment with arundic acid had a protective effect against MPTP-induced neuronal damage in the striatum and the substantia nigra of mice. Furthermore, this agent ameliorated the severe reductions in number of isolectin reactive microglia in the striatum and the substantia nigra 7 days after MPTP treatment. These results demonstrate that the inhibition of S100β synthesis in astrocytes may be the major component of the beneficial effect of arundic acid. Thus, our present findings provide that the therapeutic strategies targeted to astrocytic modulation with arundic acid offers a great potential for restoring the functional capacity of the surviving dopaminergic neurons in individuals affected with Parkinson’s disease.
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This study was supported in part by the Grant-in-Aid for Scientific Research (12877163, 13671095 and 13670627) from the Ministry of Science and Education in Japan.
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Oki, C., Watanabe, Y., Yokoyama, H. et al. Delayed Treatment with Arundic Acid Reduces the MPTP-induced Neurotoxicity in Mice. Cell Mol Neurobiol 28, 417–430 (2008). https://doi.org/10.1007/s10571-007-9241-2
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DOI: https://doi.org/10.1007/s10571-007-9241-2