Mice carrying a humanized Foxp2 knock-in allele show region-specific shifts of striatal Foxp2 expression levels

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
C SchreiweisMatthias Groszer

Abstract

Genetic and clinical studies of speech and language disorders are providing starting points to unravel underlying neurobiological mechanisms. The gene encoding the transcription factor FOXP2 has been the first example of a gene involved in the development and evolution of this human-specific trait. A number of autosomal-dominant FOXP2 mutations are associated with developmental speech and language deficits indicating that gene dosage plays an important role in the disorder. Comparative genomics studies suggest that two human-specific amino acid substitutions in FOXP2 might have been positively selected during human evolution. A knock-in mouse model carrying these two amino acid changes in the endogenous mouse Foxp2 gene (Foxp2hum/hum) shows profound changes in striatum-dependent behaviour and neurophysiology, supporting a functional role for these changes. However, how this affects Foxp2 expression patterns in different striatal regions and compartments has not been assessed. Here, we characterized Foxp2 protein expression patterns in adult striatal tissue in Foxp2hum/hum mice. Consistent with prior reports in wildtype mice, we find that striatal neurons in Foxp2hum/hum mice and wildtype littermates express Foxp2 in a range fro...Continue Reading

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Jul 8, 2019·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Michel Thiebaut de Schotten, Karl Zilles
Aug 4, 2021·Genes, Brain, and Behavior·Sophie von MertenDiethard Tautz

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