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Arquitectura molecular del cerebro en desarrollo del ratón
Gioele La Manno1,2, Kimberly Siletti3, Alessandro Furlan3,4
1Division of Molecular Neurobiology, Department of Medical Biochemistry and Biophysics, Karolinska Institute, Stockholm, Sweden. gioele.lamanno@epfl.ch.
Nature
|July 29, 2021
Resumen
Los investigadores crearon un atlas molecular completo del cerebro embrionario del ratón, identificando casi 800 estados celulares y mapeando la expresión génica para comprender el desarrollo del cerebro desde la gastrulación hasta el nacimiento.
Área de la Ciencia:
- La neurociencia
- Biología del desarrollo
- La genómica
Sus antecedentes:
- El desarrollo del cerebro de los mamíferos implica interacciones complejas de señales espaciales, señalización celular y programas genéticos, que conducen a más de mil tipos celulares distintos.
- La comprensión de este proceso requiere una caracterización sistemática de los estados celulares en todo el rango espacial-temporal de desarrollo.
- La secuenciación de ARN de una sola célula y la transcriptómica espacial son herramientas poderosas para revelar la heterogeneidad molecular en el sistema nervioso.
Objetivo del estudio:
- Para crear un atlas transcriptómico completo de una sola célula del cerebro embrionario del ratón.
- Identificar y caracterizar los estados celulares durante el desarrollo del cerebro embrionario.
- Mapear los patrones de expresión espacial de los genes clave del desarrollo e integrar esto con los datos de una sola célula.
Principales métodos:
- Secuenciación completa de ARN de una sola célula del cerebro embrionario de ratón desde la gastrulación hasta el nacimiento.
- Secuenciación in situ del ARNm para determinar los patrones de expresión génica espacial.
- Integración de datos transcriptómicos de una sola célula con datos de expresión espacial.
Principales resultados:
- Identificación de casi 800 estados celulares distintos durante el desarrollo del cerebro embrionario del ratón.
- Caracterización de los programas de desarrollo para los elementos funcionales del cerebro, incluido el neuroepitelio, los organizadores secundarios y las células progenitoras.
- Mapeo preciso de la organización espacial de los progenitores neuronales durante el patrón del sistema nervioso a través del análisis de datos integrados.
Conclusiones:
- El estudio proporciona un atlas molecular detallado del desarrollo del cerebro embrionario del ratón.
- Los hallazgos aclaran las trayectorias de desarrollo y la organización espacial de los progenitores neuronales.
- Este recurso hará avanzar nuestra comprensión de la formación del cerebro de los mamíferos y la diversidad celular.
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