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Huella radical en sangre humana completa
Mingming Zhao1, Lyle Tobin1, Sandeep K Misra1
1Department of BioMolecular Sciences, University of Mississippi, Oxford, MS, USA.
Nature communications
|February 7, 2026
Resumen
La huella proteica radical (RPF) ahora es aplicable en sangre viva de mamíferos. Esta técnica revela cambios estructurales en proteínas asociados con enfermedades, como los que se encuentran en la diabetes mellitus tipo 2 (T2DM).
Área de la Ciencia:
- Bioquímica
- Biología Estructural
- Proteómica
Sus antecedentes:
- La huella proteica radical (RPF) es un método clave para estudiar la estructura e interacciones de las proteínas.
- Las aplicaciones actuales de la RPF son principalmente in vitro, lo que limita su uso en sistemas biológicos complejos.
- La RPF no se había aplicado previamente a tejidos vivos de mamíferos.
Objetivo del estudio:
- Establecer y validar la huella proteica radical (RPF) en sangre completa de mamíferos.
- Investigar los cambios estructurales de las proteínas en sangre de ratones de tipo salvaje y con diabetes mellitus tipo 2 (T2DM).
- Explorar el potencial de la RPF para la proteómica estructural clínica y preclínica.
Principales métodos:
- Se utilizó persulfato fotoactivado con el sistema de fotólisis FOX para el marcado de proteínas en sangre de ratón.
- Se implementó un protocolo optimizado de inactivación para minimizar el marcado de fondo.
- Se analizaron las modificaciones oxidativas en las once proteínas más abundantes utilizando RPF.
Principales resultados:
- Se aplicó con éxito la RPF en sangre completa de mamíferos sin alterar la morfología celular.
- Se detectaron cambios conformacionales asociados a enfermedades en múltiples proteínas en ratones con T2DM.
- Se validó la capacidad de la RPF para identificar cambios estructurales relacionados con la activación del complemento y el aumento de la saturación de hierro de la transferrina.
Conclusiones:
- Se demostró la viabilidad y eficacia de la RPF en sangre de mamíferos.
- La RPF ofrece un enfoque novedoso para la proteómica estructural in vivo en modelos preclínicos y muestras clínicas.
- Este método puede revelar información crítica sobre los mecanismos de las enfermedades a nivel de la estructura de las proteínas.
Palabras clave:
huella proteica radicalsangre de mamíferosproteómica estructuraldiabetes mellitus tipo 2cambios conformacionalesactivación del complementosaturación de hierro de la transferrinaMás Videos Relacionados
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