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CXCL12/CXCR4 signaling pathway regulates cochlear development in neonatal mice
Wen Zhang1, Ji-Zhou Sun2, Yu Han3
1Department of Otolaryngology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi 710068, P.R. China.
Molecular Medicine Reports
|April 8, 2016
Summary
The CXCL12/CXCR4 signaling pathway is vital for cochlear development. This pathway promotes spiral ganglion neuron survival and neurite growth in neonatal mice.
Area of Science:
- Neuroscience
- Developmental Biology
- Cell Signaling
Background:
- Chemokine signaling regulates cellular processes.
- The CXCL12/CXCR4 pathway is crucial for neural network formation.
- Its role in cochlear development remains unclear.
Purpose of the Study:
- Investigate the CXCL12/CXCR4 pathway's role in neonatal mouse cochlear development.
- Determine its impact on spiral ganglion neuron survival and neurite outgrowth.
Main Methods:
- Immunofluorescence, RT-qPCR, and Western blot to detect CXCL12 and CXCR4 expression.
- In vitro treatment of spiral ganglion neurons with CXCL12 and CXCR4 antagonist AMD100.
- In vivo inhibition of the CXCL12/CXCR4 pathway in neonatal mice.
Main Results:
- CXCL12 and CXCR4 expression increased during cochlear development.
- CXCL12 enhanced spiral ganglion neuron survival by reducing apoptosis.
- CXCL12 promoted neurite outgrowth, an effect blocked by AMD100.
- In vivo pathway inhibition reduced spiral ganglion neuron number and altered morphology.
Conclusions:
- The CXCL12/CXCR4 signaling pathway is essential for cochlear development.
- It plays a critical role in spiral ganglion neuron survival and neurite formation.
- This pathway represents a potential target for auditory system development research.
