[The changes of GABA and GABAergic neurons in inferior colliculus of unilateral cochlear damage rats].
OBJECTIVE
To observe the changes of GABA and GABAergic neurons in rat inferior colliculus following unilateral cochlear damage and explore the function and significance of GABA in reorganization of auditory center after deafferentation.


METHODS
Twenty sprague dawley rats were divided into four groups randomly. The technique of direct anti-GABA immunocytochemistry (SP) was used in this study. The quantity of GABA was measured by 835-50 type Amino Acid Automatism Analyzer and compared at one week, two weeks and one month after unilateral cochlear ablation, respectively.


RESULTS
Compared with controlled groups, the quantity levels of GABA decreased and the number of GABAergic neurons also reduced one week after unilateral cochlear damage and there was a significant difference in GABA between two groups( P <0. 05); after one month, the quantity of GABA and the number of GABAergic neurons almost reached the normal level, the differences were no significant.


CONCLUSIONS
The dynamic change of GABA in rat inferior colliculus reflected the neuronal activity, which implied that GABA may play an important role in reorganization of auditory center after unilateral cochlear damage.
Wang
Qinying
Q
Department of Otolaryngology, the First Affiliated Hospital,Medical College of Zhejiang University, Hangzhou, 310003, China.
Hua
Qingquan
Q
Wang
Shenqing
S
Xiao
Bokui
B
Liao
Hua
H
D000818:Animals; D003051:Cochlea / Q000378:metabolism / Q000473:pathology*; D007245:Inferior Colliculi / Q000378:metabolism*; D009474:Neurons / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D005680:gamma-Aminobutyric Acid / Q000378:metabolism*
D005680:gamma-Aminobutyric Acid