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1.
Rev Neurol ; 34(12): 1112-8, 2002.
Article in Spanish | MEDLINE | ID: mdl-12134273

ABSTRACT

INTRODUCTION: Glia conditioned medium (GCM) is neurotrophic for dopaminergic (DA) neurons and protects against MPP+ toxicity in vitro. We present the data from the first study in vivo of the effects of GCM. MATERIAL AND METHODS: The restorative effects were examined in rats with lesions produced by 6-hydroxy-dopamine (6-OH-DA) in the medial longitudinal fasciculus. At four weeks, animals with an apomorphine induced rotation rate above three per minute were randomised for infusion with GCM, defined medium (DM) or saline through a striatal cannula for two weeks. To investigate the protective effects of GCM, the animals received a striatal injection of GCM or vehicle at the same time as the lesion was induced by 6-OH-DA and were sacrificed three weeks later. RESULTS: In the experiments on the restorative effect, the GCM infusion produced a significant increase in dopamine (DA) levels on the side with the lesion, in the limbic system (455.8 108.4 ng/g of tissue) and in the striatum (242.1 69.2 ng/g of tissue), as compared with the controls (110.8 36,4 and 108.4 22 ng/g). In the experiments on the protective effect, GCM induced higher levels of DA, 3,4-dihydroxyphenylacetic acid and 3 methoxytyramine (3-MT). In both models, the apomorphine induced rotation in animals with lesions caused by 6-OH-DA and treated with GCM was lower than that of the animals infused with DM or saline. CONCLUSIONS: These experiments show that GCM has protective and restorative effects in an experimental model of Parkinson's disease.


Subject(s)
Culture Media, Conditioned , Neuroglia/metabolism , Neurons/drug effects , Neuroprotective Agents/pharmacology , Oxidopamine/toxicity , Animals , Apomorphine/pharmacology , Brain/anatomy & histology , Brain/drug effects , Brain/pathology , Brain Chemistry , Cells, Cultured , Disease Models, Animal , Dopamine Agonists/pharmacology , Male , Neuroglia/cytology , Neurons/cytology , Neuroprotective Agents/chemistry , Parkinson Disease/pathology , Parkinson Disease/physiopathology , Random Allocation , Rats , Rats, Wistar
2.
Rev. neurol. (Ed. impr.) ; 34(12): 1112-1118, 16 jun., 2002.
Article in Es | IBECS | ID: ibc-27778

ABSTRACT

Introducción. El medio condicionado por glía (MCG) es neurotrófico para las neuronas dopaminérgicas (DA) y protege de la toxicidad inducida por MPP+ in vitro. Presentamos los datos del primer estudio in vivo de los efectos del MCG. Material y métodos. El efecto `restaurador' se investigó en ratas lesionadas con 6-hidroxi-dopamina (6-OH-DA) en el fascículo longitudinal medial. A las cuatro semanas, los animales con una tasa de rotación inducida por apomorfina mayor de tres vueltas por minuto se aleatorizaron para la infusión de MCG, medio definido (MD) o salino durante dos semanas a través de una cánula estriatal. Para investigar los efectos `protectores' del MCG, los animales recibieron una inyección estriatal de MCG o vehículo simultánea a la lesión por 6-OH-DA y se sacrificaron tres semanas después. Resultados. La infusión de MCG produjo en los experimentos de efecto `restaurador' un incremento significativo en los niveles de dopamina (DA) en el lado lesionado, en el sistema límbico (455,8ñ 108,4 ng/g de tejido) y en el estriado (242,1ñ 69,2 ng/g de tejido), comparado con los controles (110,8ñ 36,4 y 108,4ñ 22 ng/g). En los experimentos de efecto `protector', el MCG indujo niveles más altos de DA, ácido 3,4dihidroxifenilacético (DOPAC) y 3-metoxitiramina (3-MT). En ambos modelos, la rotación que se indujo mediante apomorfina en los animales lesionados con 6-OH-DA y tratados con MCG fue menor que en los infundidos con MD o salino. Conclusiones. Estos experimentos demuestran que el MCG tiene efectos protectores y restauradores en un modelo experimental de la enfermedad de Parkinson (AU)


Subject(s)
Middle Aged , Rats , Animals , Male , Humans , Culture Media, Conditioned , Tomography, X-Ray Computed , Oxidopamine , Rats, Wistar , Neuroprotective Agents , Dopamine Agonists , Nerve Tissue Proteins , Neuroglia , Parkinson Disease , Neurons , Random Allocation , Paraneoplastic Cerebellar Degeneration , Antibodies , Apomorphine , Cells, Cultured , Disease Models, Animal , RNA-Binding Proteins , Carcinoma, Small Cell , Pancreatic Neoplasms , Telencephalon , Brain Chemistry
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