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Zhonghua Yi Xue Za Zhi. 2014 Feb 11;94(5):382-5.

[Effects of low-frequency electrical stimulation of hippocampus on the expression of GABAA receptor α1 and β2 subunits in kainate-kindled rats].

[Article in Chinese]

Author information

1
Ningxia Medical University, Incubation Base of National Key Laboratory for Cerebrocranical Disease, Yinchuan 750004, China.
2
Ningxia Medical University, Incubation Base of National Key Laboratory for Cerebrocranical Disease, Yinchuan 750004, China. Email: suntao@nxmu.edu.cn.

Abstract

OBJECTIVE:

To explore the effects of low-frequency electrical stimulation (LFS) of hippocampus on the expression of GABAA receptor α1 and β2 subunits in the kainite (KA)-kindled rats and explore its underlying rescue mechanism for temporal lobe epilepsy.

METHODS:

The SD rats were divided into 4 groups (n = 10):control group:no operation; epilepsy group:KA was stereotactically injected into rat hippocampus to establish KA-kindled model; sham-LFS group:only implanting of electrodes into hippocampus without LFS; LFS group:KA-kindled model with LFS. Then hippocampal tissues were collected and their expressions of GABAA receptor α1 and β2 subunits measured by immunohistochemistry, quantitative-polymerase chain reaction (q-PCR) and Western blot.Nissl staining was performed to detect the number of damaged hippocampal neurons.

RESULTS:

There were significant decreases of GABAA receptor α1 and β2 subunits in kindled hippocampus (P < 0.01). LFS resulted in an effective rescue, but failed to reach normal levels. The damaged neurons could not be reversed according to Nissl staining.

CONCLUSION:

The hippocampal application of LFS may protect against seizures by modulating the expressions of α1 and β2 GABAA receptor subunits.

PMID:
24746089
[Indexed for MEDLINE]

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