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Excitotoxic damage, disrupted energy metabolism, and oxidative stress in the rat brain: antioxidant and neuroprotective effects of L-carnitine.
J Neurochem. 2008 May; 105(3):677-89.JN

Abstract

Excitotoxicity and disrupted energy metabolism are major events leading to nerve cell death in neurodegenerative disorders. These cooperative pathways share one common aspect: triggering of oxidative stress by free radical formation. In this work, we evaluated the effects of the antioxidant and energy precursor, levocarnitine (L-CAR), on the oxidative damage and the behavioral, morphological, and neurochemical alterations produced in nerve tissue by the excitotoxin and free radical precursor, quinolinic acid (2,3-pyrindin dicarboxylic acid; QUIN), and the mitochondrial toxin, 3-nitropropionic acid (3-NP). Oxidative damage was assessed by the estimation of reactive oxygen species formation, lipid peroxidation, and mitochondrial dysfunction in synaptosomal fractions. Behavioral, morphological, and neurochemical alterations were evaluated as markers of neurotoxicity in animals systemically administered with L-CAR, chronically injected with 3-NP and/or intrastriatally infused with QUIN. At micromolar concentrations, L-CAR reduced the three markers of oxidative stress stimulated by both toxins alone or in combination. L-CAR also prevented the rotation behavior evoked by QUIN and the hypokinetic pattern induced by 3-NP in rats. Morphological alterations produced by both toxins (increased striatal glial fibrillary acidic protein-immunoreactivity for QUIN and enhanced neuronal damage in different brain regions for 3-NP) were reduced by L-CAR. In addition, L-CAR prevented the synergistic action of 3-NP and QUIN to increase motor asymmetry and depleted striatal GABA levels. Our results suggest that the protective properties of L-CAR in the neurotoxic models tested are mostly mediated by its characteristics as an antioxidant agent.

Authors+Show Affiliations

Laboratorio de Aminoácidos Excitadores, Instituto Nacional de Neurología y Neurocirugía Manuel Velasco Suárez, México, Mexico.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18194214

Citation

Silva-Adaya, Daniela, et al. "Excitotoxic Damage, Disrupted Energy Metabolism, and Oxidative Stress in the Rat Brain: Antioxidant and Neuroprotective Effects of L-carnitine." Journal of Neurochemistry, vol. 105, no. 3, 2008, pp. 677-89.
Silva-Adaya D, Pérez-De La Cruz V, Herrera-Mundo MN, et al. Excitotoxic damage, disrupted energy metabolism, and oxidative stress in the rat brain: antioxidant and neuroprotective effects of L-carnitine. J Neurochem. 2008;105(3):677-89.
Silva-Adaya, D., Pérez-De La Cruz, V., Herrera-Mundo, M. N., Mendoza-Macedo, K., Villeda-Hernández, J., Binienda, Z., Ali, S. F., & Santamaría, A. (2008). Excitotoxic damage, disrupted energy metabolism, and oxidative stress in the rat brain: antioxidant and neuroprotective effects of L-carnitine. Journal of Neurochemistry, 105(3), 677-89. https://doi.org/10.1111/j.1471-4159.2007.05174.x
Silva-Adaya D, et al. Excitotoxic Damage, Disrupted Energy Metabolism, and Oxidative Stress in the Rat Brain: Antioxidant and Neuroprotective Effects of L-carnitine. J Neurochem. 2008;105(3):677-89. PubMed PMID: 18194214.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Excitotoxic damage, disrupted energy metabolism, and oxidative stress in the rat brain: antioxidant and neuroprotective effects of L-carnitine. AU - Silva-Adaya,Daniela, AU - Pérez-De La Cruz,Verónica, AU - Herrera-Mundo,María Nieves, AU - Mendoza-Macedo,Karina, AU - Villeda-Hernández,Juana, AU - Binienda,Zbigniew, AU - Ali,Syed F, AU - Santamaría,Abel, Y1 - 2008/01/10/ PY - 2008/1/16/pubmed PY - 2008/5/23/medline PY - 2008/1/16/entrez SP - 677 EP - 89 JF - Journal of neurochemistry JO - J Neurochem VL - 105 IS - 3 N2 - Excitotoxicity and disrupted energy metabolism are major events leading to nerve cell death in neurodegenerative disorders. These cooperative pathways share one common aspect: triggering of oxidative stress by free radical formation. In this work, we evaluated the effects of the antioxidant and energy precursor, levocarnitine (L-CAR), on the oxidative damage and the behavioral, morphological, and neurochemical alterations produced in nerve tissue by the excitotoxin and free radical precursor, quinolinic acid (2,3-pyrindin dicarboxylic acid; QUIN), and the mitochondrial toxin, 3-nitropropionic acid (3-NP). Oxidative damage was assessed by the estimation of reactive oxygen species formation, lipid peroxidation, and mitochondrial dysfunction in synaptosomal fractions. Behavioral, morphological, and neurochemical alterations were evaluated as markers of neurotoxicity in animals systemically administered with L-CAR, chronically injected with 3-NP and/or intrastriatally infused with QUIN. At micromolar concentrations, L-CAR reduced the three markers of oxidative stress stimulated by both toxins alone or in combination. L-CAR also prevented the rotation behavior evoked by QUIN and the hypokinetic pattern induced by 3-NP in rats. Morphological alterations produced by both toxins (increased striatal glial fibrillary acidic protein-immunoreactivity for QUIN and enhanced neuronal damage in different brain regions for 3-NP) were reduced by L-CAR. In addition, L-CAR prevented the synergistic action of 3-NP and QUIN to increase motor asymmetry and depleted striatal GABA levels. Our results suggest that the protective properties of L-CAR in the neurotoxic models tested are mostly mediated by its characteristics as an antioxidant agent. SN - 1471-4159 UR - https://www.unboundmedicine.com/medline/citation/18194214/Excitotoxic_damage_disrupted_energy_metabolism_and_oxidative_stress_in_the_rat_brain:_antioxidant_and_neuroprotective_effects_of_L_carnitine_ L2 - https://doi.org/10.1111/j.1471-4159.2007.05174.x DB - PRIME DP - Unbound Medicine ER -