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Foxp2 Regulates Identities and Projection Patterns of Thalamic Nuclei During Development
Haruka Ebisu1,2,3,4, Lena Iwai-Takekoshi4, Eriko Fujita-Jimbo5
1Department of Medical Neuroscience, Graduate School of Medical Sciences, Kanazawa University, Ishikawa 920-8640, Japan.
Cerebral Cortex (New York, N.Y. : 1991)
|July 8, 2016
Summary
Forkhead box protein 2 (Foxp2) is crucial for developing the brain's thalamus. Loss of Foxp2 function in mice disrupts thalamic patterning and alters connections to the cortex.
Area of Science:
- Developmental Neuroscience
- Molecular Biology
- Genetics
Background:
- Thalamus development is critical for brain function.
- Transcription factors guiding internal thalamic patterning remain largely unknown.
- Previous research identified factors distinguishing the thalamic primordium.
Purpose of the Study:
- To investigate the role of the transcription factor Foxp2 in thalamic development.
- To understand Foxp2's function in regulating the spatial organization of thalamic nuclei.
- To examine the impact of Foxp2 on thalamocortical projections.
Main Methods:
- Analyzed the expression pattern of Foxp2 in mouse embryonic thalamic primordia.
- Utilized Foxp2 (R552H) knockin mice with a loss-of-function mutation.
- Assessed changes in thalamic nuclei size and thalamocortical projection patterns in mutant mice.
Main Results:
- Foxp2 exhibits a graded expression pattern within the developing thalamus, high posteriorly and low anteriorly.
- Loss of Foxp2 function led to shrunken posterior thalamic nuclei and expanded intermediate nuclei.
- Mutant mice displayed altered thalamocortical projection patterns, indicating disrupted connectivity.
Conclusions:
- Foxp2 plays a significant role in the internal patterning of the developing thalamus.
- Foxp2 is essential for establishing correct thalamic nuclei organization and thalamocortical connections.
- These findings reveal novel insights into the molecular mechanisms of thalamic development.
