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FGF9 is required for Purkinje cell development and function in the cerebellum
Ping He1, Shuting Zhong1, Shuaijun Lin1
1School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325030, Zhejiang, China.
Iscience
|February 14, 2024
Summary
Fibroblast growth factor 9 (FGF9) is crucial for cerebellum development and Purkinje cell function. Its absence causes ataxia and disrupts neuron migration and scaffold formation.
Area of Science:
- Neuroscience
- Developmental Biology
- Genetics
Background:
- Fibroblast growth factor 9 (FGF9) is expressed in the central nervous system (CNS).
- FGF9 is implicated in cerebellum development, with its absence linked to Purkinje cell defects.
- The precise mechanisms by which FGF9 regulates cerebellar development are not fully understood.
Purpose of the Study:
- To elucidate the role of neuronal FGF9 in cerebellar development and Purkinje cell function.
- To investigate the molecular mechanisms underlying FGF9's influence on cerebellar development.
Main Methods:
- Analysis of FGF9 deletion effects on cerebellum development.
- Assessment of Purkinje cell development and function.
- Measurement of neurotransmitter levels and signaling pathway activity (ERK).
Main Results:
- Neuronal FGF9 deletion disrupted Bergmann fiber scaffold formation and granule neuron migration.
- FGF9 deficiency led to ataxia, affecting Purkinje cell development and function, including altered action potential thresholds and excitation frequencies.
- FGF9 depletion resulted in altered neurotransmitter content, increased inflammation, and downregulated ERK signaling in Purkinje cells.
Conclusions:
- Neuronal FGF9 is essential for the proper development and function of Purkinje cells in the cerebellum.
- Insufficient FGF9 during cerebellar development leads to ataxia defects.
