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Nano-bioactivos proteicos contra la disfunción endotelial inducida por microgravedad

Anisha Kabir1, Mukilarasi B1, Anagha Manohar1

  • 1Department of Applied Mechanics and Biomedical Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India.

NPJ microgravity
|February 2, 2026
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Resumen

Los astronautas sufren disfunción vascular en el espacio debido a la microgravedad. Una nueva formulación terapéutica de nanocaja de zeína (ZNT) combate eficazmente el estrés oxidativo y protege la salud cardiovascular en condiciones espaciales simuladas.

Palabras clave:
medicina espacialnanotecnologíasalud cardiovasculardisfunción endotelialmicrogravedadestrés oxidativoterapéutica de nanocaja de zeína

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Área de la Ciencia:

  • Medicina espacial
  • Nanotecnología
  • Investigación cardiovascular

Sus antecedentes:

  • Las misiones espaciales prolongadas inducen microgravedad y exposición a la radiación cósmica, causando disfunción vascular en los astronautas a través del estrés oxidativo y el desacondicionamiento cardíaco.
  • Las terapias actuales para problemas inducidos por vuelos espaciales están limitadas por efectos secundarios y falta de eficacia contra el daño oxidativo y endotelial.

Objetivo del estudio:

  • Desarrollar y evaluar una formulación terapéutica multifuncional basada en nanocajas de zeína (ZNT) para mitigar el estrés oxidativo y proteger la salud cardiovascular en condiciones de microgravedad simulada.

Principales métodos:

  • Estudios in vitro en células endoteliales expuestas a microgravedad simulada para evaluar marcadores de estrés oxidativo, función mitocondrial, daño del ADN, apoptosis y expresión génica angiogénica.
  • Validación in vivo utilizando larvas de pez cebra y modelos de embrión de pollo para confirmar los efectos terapéuticos de ZNT.
  • Formulación de ZNT que encapsula un cóctel remedial dirigido a la protección contra el estrés oxidativo y endotelial.

Principales resultados:

  • La microgravedad indujo una generación significativa de especies reactivas de oxígeno, disfunción mitocondrial, daño del ADN y apoptosis en células endoteliales.
  • El tratamiento con ZNT restauró eficazmente el equilibrio redox, preservó la integridad mitocondrial, previno el daño del ADN y la apoptosis, y normalizó la expresión de genes angiogénicos clave (VEGFA, HIF-1α, eNOS, iNOS, FGF-2, ANG1).
  • Los efectos protectores de ZNT se confirmaron in vivo, lo que demuestra su eficacia en sistemas biológicos complejos.

Conclusiones:

  • La formulación terapéutica multifuncional basada en nanocajas de zeína (ZNT) muestra una promesa significativa para contrarrestar el daño cardiovascular inducido por la microgravedad.
  • ZNT aborda tanto el estrés oxidativo como la angiogénesis patológica, ofreciendo una nueva estrategia nanoterapéutica para la atención médica de los astronautas.
  • Esta formulación podría llenar un vacío crítico en la protección de la función cardiovascular de los astronautas durante y después del vuelo espacial.