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Stereotactically-guided Ablation of the Rat Auditory Cortex, and Localization of the Lesion in the Brain
Published on: October 11, 2017
Gene expression and plasticity in the rat auditory cortex after bilateral cochlear ablation.
Seung-Ha Oh1, Chong-Sun Kim, Jae-Jun Song
1Department of Otolaryngology-Head and Neck Surgery, College of Medicine, Seoul National University, Seoul, Korea.
Acta Oto-Laryngologica
|April 25, 2007
Summary
Bilateral cochlear ablation in rats alters auditory cortex gene expression, particularly immediate early genes and neural plasticity genes. Cross-modal plasticity may contribute to these early changes.
Area of Science:
- Neuroscience
- Auditory System Research
- Molecular Biology
Background:
- The auditory cortex undergoes significant development during critical periods.
- Sensory deafferentation, such as bilateral cochlear ablation, can induce profound changes in neural circuits.
Purpose of the Study:
- To identify genes involved in normal auditory cortex development.
- To investigate gene expression changes in the auditory cortex following bilateral cochlear ablation.
Main Methods:
- A rat model of bilateral cochlear ablation was created.
- DNA microarray technology was used to analyze differential gene expression.
- Real-time PCR confirmed gene expression changes.
Main Results:
- Expression of immediate early genes and neural plasticity genes initially decreased then increased post-ablation.
- Neurotransmission-related gene expression decreased at 12 weeks.
Conclusions:
- Auditory cortex plasticity after cochlear ablation involves immediate early and neural plasticity genes.
- Cross-modal plasticity likely plays a role in early auditory cortex changes.
