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Published on: April 22, 2015
KLF7 orchestrates hippocampal development through neurogenesis and Draxin-mediated neuronal migration
Yitong Liu1, Wentong Hong2, Yuyan Zhou1
1Department of Neurology, Shanghai Pudong Hospital and Department of Histoembryology, School of Basic Medical Sciences, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Fudan University, Shanghai, 200032, China.
Krüppel-like factor 7 (KLF7) is vital for hippocampal development, controlling neurogenesis and neuronal migration. Its absence causes brain shrinkage and cognitive deficits, offering insights into neurodevelopmental disorders.
Area of Science:
- Neuroscience
- Developmental Biology
- Genetics
Background:
- The hippocampus is crucial for learning, memory, and emotion, developing primarily during early life.
- Krüppel-like factor 7 (KLF7), a transcription factor, is implicated in neurodevelopmental disorders like autism spectrum disorder and intellectual disability.
Purpose of the Study:
- To investigate the role of KLF7 in hippocampal development using a conditional knockout mouse model.
- To elucidate the molecular mechanisms by which KLF7 influences hippocampal structure and function.
Main Methods:
- Utilized conditional knockout mice (Emx1-Cre;Klf7Flox(F)/F) to delete KLF7 in hippocampal progenitors.
- Performed transcriptomic profiling to identify downstream targets of KLF7.
- Assessed hippocampal development, neurogenesis, neuronal migration, and behavioral phenotypes.
Main Results:
- KLF7 deletion led to significant hippocampal shrinkage, impaired neurogenesis, differentiation, and migration.
- KLF7 mutant mice displayed abnormal neuronal projections, anxiety- and depression-like behaviors, and memory deficits.
- Draxin, a neural chemorepellent, was identified as a key downstream target, and its overexpression rescued migration defects.
Conclusions:
- KLF7 is essential for normal hippocampal development and function, regulating neuronal migration via Draxin.
- Pathogenic KLF7 variants may underlie neurological deficits observed in neurodevelopmental disorders.
- KLF7 and its downstream targets represent potential therapeutic targets for treating neurodevelopmental disorders.
