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La entrada geniculocortical impulsa las distinciones genéticas entre las áreas visuales primarias y de orden superior
Shen-Ju Chou1, Zoila Babot, Axel Leingärtner
1Molecular Neurobiology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA, USA.
Science (New York, N.Y.)
|June 8, 2013
Resumen
Los factores de transcripción especifican la corteza visual temprana. Los axones talamocorticales luego refinan estas áreas, distinguiendo las regiones visuales de orden superior de V1 y permitiendo funciones específicas.
Área de la Ciencia:
- La neurociencia es la neurociencia.
- Biología del desarrollo Biología del desarrollo.
- Desarrollo cortical Desarrollo cortical.
Sus antecedentes:
- El patrón del área neocortical se entiende para las áreas visuales primarias (V1) a través de factores de transcripción progenitoras.
- Todavía no están claros los mecanismos que distinguen las áreas visuales de orden superior (V(HO)) de V1.
Objetivo del estudio:
- Para investigar el papel de la entrada del axón talamocortical (TCA) en la diferenciación entre V1 y V{HO).
- Para dilucidar el proceso en varias etapas del patrón del área cortical visual.
Principales métodos:
- Los TCA geniculocorticales genéticamente eliminados en vivo.
- Se analizaron las diferencias de expresión génica de patrón entre V1 y V ((HO).).
Principales resultados:
- Se requiere la entrada geniculocortical TCA para distinguir entre V1 y V (HO).
- La entrada de TCA impulsa la expresión génica patronizada en todas las capas.
- Esta entrada es crucial para establecer las propiedades funcionales específicas del área.
Conclusiones:
- El patrón del área cortical visual implica un proceso de dos etapas.
- La especificación inicial por los factores de transcripción progenitor crea un campo occipital.
- La posterior diferenciación en V1 y V ((HO) requiere la entrada de TCA para la especialización genética y funcional.
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