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La adaptación de las células linfoides innatas a una deficiencia de micronutrientes promueve la inmunidad tipo 2 de
S P Spencer1, C Wilhelm, Q Yang
1Immunity at Barrier Sites Initiative, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Disease, NIH, Bethesda 20892, USA.
Science (New York, N.Y.)
|January 25, 2014
Resumen
La desnutrición afecta a las células inmunes. La deficiencia de vitamina A debilita las células linfoides innatas tipo 3 (ILC3s) pero expande las ILC2s, mejorando la resistencia a ciertas infecciones.
Área de la Ciencia:
- Inmunología Inmunología.
- Ciencias de la Nutrición Ciencias de la Nutrición
- Microbiología Microbiología.
Sus antecedentes:
- La adaptación del sistema inmunológico a la desnutrición en las superficies de barrera es poco conocida.
- La deficiencia de vitamina A perjudica la inmunidad adaptativa.
- Las células linfoides innatas (CLI) juegan un papel crucial en la inmunidad de la mucosa.
Objetivo del estudio:
- Investigar cómo el sistema inmunológico se adapta a la desnutrición, específicamente a la deficiencia de vitamina A.
- Determinar el papel de las ILC en las respuestas inmunes durante la privación de nutrientes.
- Comprender las implicaciones para la defensa del huésped en las superficies de barrera.
Principales métodos:
- Análisis de las poblaciones de ILC (ILC3s e ILC2s) en ratones con deficiencia de vitamina A.
- Evaluación de las respuestas inmunes a las infecciones bacterianas y de nematodos.
- Evaluación de la producción de interleucina-13 (IL-13) por el ILC2s.
Principales resultados:
- La deficiencia de vitamina A condujo a una reducción significativa en ILC3s, comprometiendo la inmunidad a las infecciones bacterianas.
- Paradójicamente, la privación de vitamina A causó una marcada expansión de las ILC2s productoras de IL-13.
- Esta expansión confirió resistencia a las infecciones de nematodos en ratones.
Conclusiones:
- Los ILC son sensores clave del estrés dietético y la desnutrición.
- La desnutrición induce un cambio hacia la inmunidad innata de tipo 2.
- Esta adaptación inmune puede mejorar la supervivencia del huésped durante deficiencias de nutrientes y desafíos de barrera.
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