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Modulación impulsada por astrocitos de las redes funcionales del cerebro entero y señales BOLD reveladas por fMRI
Zhuang Liu1, Li Wang2, Tiangang Lou3
1Department of Ultrasonography, Songjiang Research Institute, Shanghai Key Laboratory of Emotions and Affective Disorders, Songjiang Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
Neuroscience bulletin
|February 11, 2026
Resumen
Los astrocitos influyen activamente en la actividad cerebral, modulando las señales neuronales y el flujo sanguíneo cerebral. Este estudio revela su papel fundamental en el acoplamiento neurovascular, desafiando las visiones tradicionales de la función cerebral.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Biología celular Biología celular.
Sus antecedentes:
- Los astrocitos fueron tradicionalmente vistos como células de apoyo pasivo en el cerebro.
- La evidencia emergente destaca su papel activo en la modulación de la actividad neuronal y la transmisión de señales.
Objetivo del estudio:
- Investigar el impacto de la activación de los astrocitos en los potenciales de campo locales (LFP) y las señales dependientes del nivel de oxígeno en la sangre (BOLD).
- Para explorar la influencia de los astrocitos en las respuestas electrofisiológicas y el acoplamiento neurovascular utilizando neuroimagen multimodal.
Principales métodos:
- Quimogenética y optogenética combinadas con imágenes de resonancia magnética funcional (fMRI).
- Utilizó un enfoque de neuroimagen multimodal para evaluar los efectos de activación de los astrocitos en regiones específicas del cerebro como la corteza prefrontal (PFC).
Principales resultados:
- La activación de los astrocitos condujo a aumentos significativos en la energía LFP dentro de las bandas de frecuencia Theta y Delta.
- La reactivación de los astrocitos optogenéticos evocó respuestas audaces incluso después de la inhibición neuronal, lo que indica un papel en la regulación del flujo sanguíneo cerebral.
Conclusiones:
- Los astrocitos modulan activamente la dinámica neuronal y el acoplamiento neurovascular.
- Los hallazgos desafían la comprensión convencional de los orígenes de la señal BOLD y enfatizan la importancia de los astrocitos en la conectividad y función del cerebro.
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