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A Piglet Model of Neonatal Hypoxic-Ischemic Encephalopathy
Published on: May 16, 2015
Bajas concentraciones plasmáticas de arginina en niños con malaria cerebral y disminución de la producción de óxido
Bert K Lopansri1, Nicholas M Anstey, J Brice Weinberg
1Division of Infectious Diseases, VA and University of Utah Medical Centers, Salt Lake City, UT, USA.
Lancet (London, England)
|February 28, 2003
Resumen
Los niños con malaria cerebral tienen bajos niveles de L-arginina, una condición llamada hipoargininaemia. Esta deficiencia está relacionada con enfermedades graves y puede afectar la producción de óxido nítrico (NO), lo que afecta los resultados de la malaria.
Área de la Ciencia:
- Inmunología Inmunología.
- Bioquímica nutricional y nutrición.
- Enfermedades Infecciosas Pediátricas
Sus antecedentes:
- La producción de óxido nítrico (NO) y la expresión de NO sintasa 2 (NOS2) se reducen en niños tanzanos con malaria cerebral.
- Los factores que regulan NOS2 también afectan la absorción y síntesis de L-arginina, el sustrato para la producción de NO.
Objetivo del estudio:
- Investigar las concentraciones de L-arginina en niños tanzanos con y sin malaria cerebral.
- Determinar la asociación entre los niveles de L-arginina y la gravedad de la malaria cerebral y la fatalidad de los casos.
Principales métodos:
- Se analizaron muestras de plasma de niños tanzanos con malaria cerebral, malaria sin complicaciones y controles sanos.
- Las concentraciones de L-arginina se midieron mediante ensayos bioquímicos.
- El análisis de regresión logística se empleó para evaluar las asociaciones con la letalidad del caso.
Principales resultados:
- Las concentraciones de L-arginina fueron significativamente más bajas en los niños con malaria cerebral (46 micromol/L) en comparación con la malaria sin complicaciones (70 micromol/L) y los controles sanos (122 micromol/L).
- La hipoargininaemia (baja L-arginina) se asoció fuertemente con la fatalidad de casos de malaria cerebral.
- Los niveles reducidos de L-arginina se correlacionan con la disminución de la producción de NO en la malaria severa.
Conclusiones:
- La hipoargininaemia es prevalente en niños tanzanos con malaria cerebral.
- Los bajos niveles de L-arginina pueden contribuir a la enfermedad grave y al aumento de la mortalidad en la malaria cerebral.
- La restauración de los niveles de L-arginina podría ser una estrategia terapéutica potencial para la malaria severa.
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