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El perfil espacio-temporal revela el impacto de la restricción calórica en el envejecimiento del cerebro de los

Zehao Zhang¹, Alexander Epstein¹, Chloe Schaefer²

¹Laboratory of Single-Cell Genomics and Population Dynamics, The Rockefeller University, New York, NY, USA; The David Rockefeller Graduate Program in Bioscience, The Rockefeller University, New York, NY, USA.

|August 20, 2025

Resumen

La restricción calórica (CR) extiende la vida útil y preserva la función cognitiva al retrasar la inflamación y preservar los precursores neuronales en el cerebro de ratón envejecido. Este estudio traza los mecanismos neuroprotectores celulares y moleculares precisos de CR.

Área de la Ciencia:

La neurociencia
Investigación sobre el envejecimiento
Biología molecular

Sus antecedentes:

Se sabe que la restricción calórica (CR) extiende la vida útil y ralentiza el deterioro cognitivo.
Los mecanismos celulares y moleculares específicos que subyacen a los efectos neuroprotectores de la CR no se comprenden completamente.

Objetivo del estudio:

Investigar el impacto de la CR en las poblaciones celulares y las vías moleculares en el cerebro de ratón envejecido.
Para crear un mapa espacio-temporal de alta resolución de los efectos de la CR en el envejecimiento del cerebro.

Principales métodos:

Transcriptómica de un solo núcleo (EasySci) en más de 500,000 células de cerebros de ratones de control y CR en tres grupos de edad.
Transcriptómica espacial IRISeq sin imágenes en secciones de cerebro de ratones envejecidos.
Análisis del impacto de la CR en más de 300 estados celulares y 11 regiones cerebrales.

Principales resultados:

CR retrasó la expansión de las poblaciones de células inflamatorias.
La CR preservó las células precursoras neurales y redujo los genes asociados con el envejecimiento (estrés, senescencia, inflamación, daño al ADN).
CR restauró genes específicos de la región relacionados con la función cognitiva, el mantenimiento de la mielina y el ritmo circadiano.

Conclusiones:

La CR ejerce amplios efectos neuroprotectores mediante la modulación de vías celulares y moleculares específicas en el cerebro envejecido.
Este estudio proporciona un mapa detallado de los mecanismos beneficiosos de la CR, ofreciendo información sobre el envejecimiento cognitivo y las posibles intervenciones.

Palabras clave:

CP: genómica CP: Metabolismo Envejecimiento del cerebro restricción calórica Envejecimiento celular neurogénesis La neuroinflamación el rejuvenecimiento transcriptómica de una sola célula Transcriptómica espacial y sus aplicaciones

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