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Insm1a Is Required for Zebrafish Posterior Lateral Line Development
Yingzi He1,2, Xiaoling Lu1, Fuping Qian3
1ENT Institute and Otorhinolaryngology Department of Affiliated Eye and ENT Hospital, State Key Laboratory of Medical Neurobiology, Fudan UniversityShanghai, China.
Frontiers in Molecular Neuroscience
|August 22, 2017
Summary
Insulinoma-associated 1 (Insm1) is crucial for zebrafish sensory system development. Loss of Insm1a disrupts posterior lateral line (pLL) development by affecting cell proliferation and signaling pathways.
Area of Science:
- Developmental Biology
- Neuroscience
- Genetics
Background:
- Insulinoma-associated 1 (Insm1) is a transcription factor vital for nervous system development.
- Its role in sensory system development and molecular mechanisms are not well understood.
Purpose of the Study:
- To investigate the function of Insm1a in zebrafish posterior lateral line (pLL) development.
- To elucidate the molecular mechanisms underlying Insm1a's role in sensory system embryogenesis.
Main Methods:
- Whole-mount in situ hybridization to detect gene expression.
- Morpholino knockdown to inhibit insm1a expression in zebrafish embryos.
- Analysis of pLL primordium migration, neuromast formation, and cell proliferation.
Main Results:
- insm1a is expressed in the developing zebrafish pLL system.
- insm1a knockdown caused defects in primordium migration and reduced neuromast and hair cell numbers.
- Loss of insm1a led to decreased cell proliferation and altered Wnt/β-catenin and Fgf signaling pathways.
Conclusions:
- Insm1a plays a critical role in zebrafish pLL development.
- It regulates pLL primordium migration, cell proliferation, and key signaling pathways.
- These findings highlight Insm1a's importance in sensory system embryogenesis.
