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Un estudio de secuencia de ARN de una sola célula del paisaje de desarrollo de la corteza prefrontal humana
Suijuan Zhong1,2, Shu Zhang3, Xiaoying Fan3
1State Key Laboratory of Brain and Cognitive Science, CAS Center for Excellence in Brain Science and Intelligence Technology (Shanghai), Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
Nature
|March 15, 2018
Resumen
Este estudio traza el desarrollo de la corteza prefrontal humana mediante el análisis de más de 2.300 células individuales, identificando 35 subtipos celulares y sus vías de desarrollo. Esta investigación proporciona un plan para comprender la formación temprana del cerebro y los trastornos del desarrollo neurológico.
Área de la Ciencia:
- La neurociencia
- Biología del desarrollo
- La genómica
Sus antecedentes:
- La corteza prefrontal humana (PFC) es crucial para la cognición de orden superior, pero su desarrollo es complejo.
- La disfunción en el desarrollo de la PFC está relacionada con trastornos del desarrollo neurológico.
- Identificar los tipos de células y las características de desarrollo en el PFC embrionario es un desafío.
Objetivo del estudio:
- Trazar un mapa exhaustivo de los tipos de células y las trayectorias de desarrollo en el PFC humano de principios a mediados de la gestación.
- Identificar nuevos genes marcadores y características de desarrollo de las células progenitoras neurales.
- Comprender la regulación molecular de la generación de neuronas y la formación de circuitos en el PFC humano en desarrollo.
Principales métodos:
- Secuenciación de ARN de más de 2.300 células individuales de PFC humano (semanas gestacionales 8-26).
- Análisis de datos transcriptómicos de una sola célula para identificar subtipos celulares y trayectorias de desarrollo.
- Análisis bioinformático para examinar y caracterizar las poblaciones celulares y las señales reguladoras.
Principales resultados:
- Identificación de 35 subtipos celulares distintos dentro de seis clases principales en el PFC humano en desarrollo.
- Caracterización detallada de las células progenitoras neurales, incluidas las células progenitoras intermedias, con nuevos genes marcadores.
- Mapeo de la línea de tiempo de neurogénesis para las neuronas excitatorias y detección de progenitores de interneuronas.
- Descubrimiento de señales intrínsecas dependientes del desarrollo que regulan la generación de neuronas y la formación de circuitos.
Conclusiones:
- Este estudio proporciona un plan celular y molecular detallado del desarrollo de la PFC humana durante la gestación temprana y media.
- Los hallazgos ofrecen información sobre la base celular de los trastornos del desarrollo neurológico.
- Este recurso facilita la investigación futura sobre la función de los PFC y su regulación.
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