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Quitosano cargado de estroncio/hidrogel de madera con arquitectura celular anisotrópica para mejorar la regeneración
Man Zhang1,2,3, Jingxi Yang1,2,3, Junyuan Zhang1,2,3
1Department of Stomatology Union Hospital Tongji Medical College Huazhong University of Science and Technology, Wuhan 430022, China.
ACS applied materials & interfaces
|August 27, 2025
Resumen
Este estudio introduce un hidrogel de madera totalmente natural que imita la estructura ósea, mejorando significativamente la resistencia mecánica y promoviendo la reparación de defectos óseos. El nuevo biomaterial mejora la actividad celular, apoyando la regeneración ósea para aplicaciones clínicas.
Área de la Ciencia:
- Ciencia de los biomateriales
- La Medicina Regenerativa
- Ingeniería de tejidos
Sus antecedentes:
- Los defectos óseos de tamaño crítico plantean desafíos clínicos significativos.
- Los polímeros naturales ofrecen biocompatibilidad pero carecen de resistencia mecánica y propiedades biomiméticas para la regeneración ósea.
- Los tratamientos existentes para los defectos óseos requieren biomateriales mejorados con un potencial mecánico y osteogénico mejorado.
Objetivo del estudio:
- Desarrollar un hidrogel de madera totalmente natural que imite la estructura ósea para mejorar la reparación de defectos óseos.
- Mejorar las propiedades mecánicas y el potencial osteogénico de los polímeros naturales para la regeneración ósea.
- Investigar la eficacia in vitro e in vivo del hidrogel de madera en la promoción de la cicatrización ósea.
Principales métodos:
- Fabricación de un hidrogel de madera totalmente natural mediante deslignificación y impregnación al vacío de nanofibras lignocelulósicas en hidrogeles de quitosano.
- Incorporación de iones de estroncio y WW para imitar los componentes minerales y estructurales del hueso.
- Evaluación de las propiedades mecánicas (resistencia a la tracción), biocompatibilidad in vitro, proliferación celular, migración y expresión génica (análisis transcriptómico).
- Evaluación in vivo de la adaptabilidad y eficacia del hidrogel en la reparación de defectos óseos craneales de tamaño crítico.
Principales resultados:
- El hidrogel de madera desarrollado imita la estructura ósea natural con una resistencia a la tracción de aproximadamente 12 MPa.
- Los estudios in vitro demostraron una excelente biocompatibilidad, promoviendo la proliferación celular y la migración.
- La liberación de iones de estroncio apoyó la angiogénesis y la osteogénesis, y el análisis transcriptómico reveló genes angiogénicos y osteogénicos regulados al alza.
- Los experimentos in vivo mostraron la adaptabilidad del hidrogel y la reparación acelerada de defectos óseos de tamaño crítico.
Conclusiones:
- El hidrogel de madera totalmente natural presenta un biomaterial prometedor para la reconstrucción de defectos óseos.
- Su estructura biomimética, su mayor resistencia mecánica y su potencial osteogénico facilitan la regeneración ósea.
- Este hidrogel de madera ofrece una nueva estrategia para desarrollar rellenos de hueco óseo avanzados en medicina regenerativa.
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