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The Cell-based L-Glutathione Protection Assays to Study Endocytosis and Recycling of Plasma Membrane Proteins
Published on: December 13, 2013
El eritrocito Glut1 desencadena la absorción de ácido deshidroascorbico en mamíferos que no pueden sintetizar
Amélie Montel-Hagen1, Sandrina Kinet, Nicolas Manel
1Institut de Génétique Moléculaire de Montpellier, CNRS, Université Montpellier I and II, Montpellier, France.
Cell
|March 25, 2008
Resumen
Los glóbulos rojos humanos transportan únicamente el precursor de vitamina C (DHA) a través de Glut1, no de glucosa, durante el desarrollo. Esto compensa la incapacidad para sintetizar la vitamina C, que implica la regulación de la estomatina.
Área de la Ciencia:
- Biología celular Biología celular.
- La bioquímica es la bioquímica.
- Fisiología Humana Fisiología Humana.
Sus antecedentes:
- Los eritrocitos humanos exhiben los niveles más altos del transportador de glucosa Glut1.
- El papel y la regulación de Glut1 durante el desarrollo de glóbulos rojos (eritropoiesis) siguen sin estar claros.
Objetivo del estudio:
- Investigar la función y regulación de Glut1 durante la eritropoiesis humana.
- Determinar el mecanismo detrás del transporte alterado de nutrientes en el desarrollo de los eritrocitos.
Principales métodos:
- Análisis de los niveles de transcripción de Glut1 y el transporte de glucosa/DHA durante la eritropoiesis.
- Identificación de las proteínas reguladoras involucradas en el transporte de eritrocitos.
Principales resultados:
- El transporte de glucosa disminuye durante la eritropoyesis a pesar del aumento de las transcripciones de Glut1.
- El transporte de ácido L-dehidroascorbico (DHA) se mejora significativamente, regulado por la estomatina.
- Los eritrocitos Glut1 y la absorción de DHA son específicos para los seres humanos y los mamíferos deficientes en la síntesis de vitamina C.
Conclusiones:
- La coexpresión de eritrocitos Glut1 y estomatina es un mecanismo compensatorio para la deficiencia de síntesis de vitamina C.
- Esto pone de relieve una adaptación única en los glóbulos rojos humanos para el transporte de nutrientes.
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