2008, Número 2
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Cir Plast 2008; 18 (2)
Cambios histológicos y electrofisiológicos en lesiones de nervio periférico tratadas con glicina. Estudio experimental
Padilla-Martin K, Baltazar-Rendon JB, Priego-Blancas RB, Uribe-Escamilla R, Alfaro-Rodriguez A
Idioma: Español
Referencias bibliográficas: 27
Paginas: 50-55
Archivo PDF: 153.44 Kb.
RESUMEN
El tratamiento de las lesiones de nervio periférico se enfoca principalmente en el tipo de daño. Se han utilizado múltiples factores para mejorar el crecimiento del cono axonal: NGF, GABA, etc. El flujo de una cantidad significativa de glicina abre los canales iónicos del receptor NMDA, altamente permeables al calcio, regulando el magnesio extracelular bajo la influencia del voltaje. En este estudio se utilizaron ratas Wistar. El nervio ciático se disecó en ambas patas para realizar estudios electrofisiológicos; posteriormente se seccionó el izquierdo, reparándolo con técnica epineural. Después se realizó otro estudio electrofisiológico para asegurar que no existían fibras colaterales. Se trataron de la siguiente manera: Grupo 1 por 15 días, Grupo 2 por 30 días y Grupo 3 por 60 días; se administró glicina a dosis de 40 mM/kg/d/ip; los Grupos 4, 5 y 6 con solución salina. Al término se realizó electrofisiología y se resecó el nervio para histología. Los resultados mostraron regeneración morfológica un mes después de la lesión del nervio, así como una recuperación funcional progresiva; aunque no estaba completamente recuperada era mayor en las ratas con glicina. Histológicamente, existen diferencias: el nervio tratado con glicina es similar a los cortes de nervios no lesionados.
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