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Dev Dyn. 2005 Nov;234(3):718-25.

Comparative analysis of Six 3 and Six 6 distribution in the developing and adult mouse brain.

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  • 1Departamento de Neurobiolog√≠a del Desarrollo, Instituto Cajal, CSIC, Madrid, Spain.


Six 3 and Six 6 genes are two closely related members of the Six/sine oculis family of homeobox containing transcription factors. Their expression and function at early stages of embryonic development has been widely addressed in a variety of species. However, their mRNA distribution during late embryonic, postnatal, and adult brain barely has been analyzed. Here, we show that despite their initial overlap in the anterior neural plate, the expression of Six 3 and Six 6 progressively segregates to different regions during mammalian brain development, maintaining only few areas of partial overlap in the thalamic and hypothalamic regions. Six 3, but not Six 6, is additionally expressed in the olfactory bulb, cerebral cortex, hippocampus, midbrain, and cerebellum. These distinct patterns support the idea that Six 3 and Six 6 are differentially required during forebrain development.

Developmental Dynamics 234:718-725, 2005. (c) 2005 Wiley-Liss, Inc.

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