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- W2023277574 abstract "In previous studies we found that intrastriatal DCG-IV administration, an agonist for group II metabotropic glutamate receptor: (i) protected striatal dopaminergic terminals against MPP(+)-induced neurotoxicity (Matarredona et al., 2001); (ii) selectively destroyed striatal GABAergic neurons (Venero et al., 2002) and (iii) induced early robust up-regulation of brain-derived neurotrophic factor (BDNF) in nigral dopaminergic neurons afferents in a target-dependent manner (Rite et al., 2005). Considering that BDNF protein is anterogradely transported to dopaminergic nerve endings, an autocrine role of BDNF could account for the neuroprotective effect of DCG-IV against the MPP(+)-induced toxicity of dopaminergic terminals. To test this possibility, we first performed a previous insult with quinolinic acid (QA) to specifically damage the striatal GABAergic neuronal cell bodies in order to remove the nigral BDNF target. Fourteen days later, we explored the potential in vivo neuroprotective action of DCG-IV against MPP(+)-induced toxicity on striatal dopaminergic nerve terminals by in vivo microdialysis. Integrity of GABAergic system was evaluated by glutamic acid decarboxylase (GAD) in situ hybridization. We demonstrate that previous striatal target ablation with QA prevented the neuroprotective effect of DCG-IV perfusion against the MPP(+)-induced neurotoxicity on dopaminergic terminals. Our results strongly suggest an important autocrine neuroprotective role of BDNF on striatal dopaminergic nerve terminals. In addition, we found an unexpected regulatory response of surviving striatal GABAergic neurons in terms of high levels of GAD mRNA expression." @default.
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- W2023277574 date "2010-12-01" @default.
- W2023277574 modified "2023-09-30" @default.
- W2023277574 title "Striatal ablation of GABAergic neurons prevents the in vivo neuroprotective effect of DCG-IV against the MPP+-induced neurotoxicity on dopaminergic nerve terminals" @default.
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- W2023277574 doi "https://doi.org/10.1016/j.neuint.2010.10.009" @default.
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