La Captación de radicales libres y la inhibición de α-glucosidasa, dos posibles mecanismos involucrados en la actividad antidiabética del ácido oleanólico

Autores/as

  • J. M. Castellano Instituto de la Grasa. CSIC. Food and Health Department. Campus of University Pablo de Olavide
  • A. Guinda Instituto de la Grasa. CSIC. Food and Health Department. Campus of University Pablo de Olavide
  • L. Macías Instituto de la Grasa. CSIC. Food and Health Department. Campus of University Pablo de Olavide
  • J. M. Santos-Lozano CIBER Physiopathology of Obesity and Nutrition (ciberobn). Instituto de Salud Carlos III - Department of Family Medicine. Primary Care Health District Seville. Primary Care Center San Pablo
  • J. Lapetra CIBER Physiopathology of Obesity and Nutrition (ciberobn). Instituto de Salud Carlos III - Department of Family Medicine. Research Unit. Primary Care Health District Seville
  • M. Rada Instituto de la Grasa. CSIC. Food and Health Department. Campus of University Pablo de Olavide

DOI:

https://doi.org/10.3989/gya.1237153

Palabras clave:

Acción antidiabética, Ácido oleanólico, Antioxidante, Inhibidor de α-glucosidasa, Olea europea

Resumen


Este trabajo estudia el papel del ácido oleanólico (OA), aislado de la hoja de olivo, como secuestrador de radicales libres e inhibidor de enzimas implicados en la hidrolisis de los carbohidratos de la dieta, dos mecanismos por los que el triterpeno podría mitigar la hiperglicemia postprandial y el estrés oxidativo. Se aportan nuevas evidencias que muestran que el OA puede capturar radicales ácido 2,2’-azino-bis-(3-etilbenzotiazolín)-6-sulfónico y peroxilo, y que ejerce una potente inhibición no-competitiva de α-glucosidasa (IC50 10.11±0.30 μM). El análisis cinético y espectrométrico llevado a cabo indica que OA interacciona con este enzima en el interior de un bolsillo hidrofóbico, mediante un proceso endotérmico no espontáneo, de naturaleza hidrofóbica. Estos son dos posibles mecanismos por los cuales el OA puede facilitar un mejor control de la hiperglucemia postprandial y el estrés oxidativo, lo que contribuye a preservar la señalización de la insulina. La obesidad, la resistencia a la insulina y la diabetes mellitus tipo 2 se consideran la primera pandemia del siglo XXI. En este sentido, el OA podría ser utilizado en futuras estrategias preventivas y terapéuticas, como ingrediente de nuevos fármacos y alimentos funcionales.

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Citas

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Publicado

2016-09-30

Cómo citar

1.
Castellano JM, Guinda A, Macías L, Santos-Lozano JM, Lapetra J, Rada M. La Captación de radicales libres y la inhibición de α-glucosidasa, dos posibles mecanismos involucrados en la actividad antidiabética del ácido oleanólico. Grasas aceites [Internet]. 30 de septiembre de 2016 [citado 18 de mayo de 2024];67(3):e142. Disponible en: https://grasasyaceites.revistas.csic.es/index.php/grasasyaceites/article/view/1608

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Sección

Investigación

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