[Effects of Baixiangdan capsule on location and expression levels of GABA(A) receptor beta2 subunit in hippocampus of PMS model rats with liver-qi invasion]

Abstract

Objective: To explore the effects of Baixiangdan capsule(BXD), a Chinese herbal compound, on the location and expression levels of GABA(A) receptor beta2 subunit (GABA(A)Rbeta2) in hippocampus of PMS model rats with liver-qi invasion.

Method: After vaginal smear examination and open field test, the selected SD rats were randomly divided into 3 groups Normal group, PMS model group with liver-qi invasion and PMS BXD-administration group with liver-qi invasion (BXD was administered with oral dosage of 10 g x kg(-1) body weight every day for 5 days). PMS model rats with liver-qi invasion were induced by electric stimulating, and evaluated by macro-behavior observation and open-field test. The location and expression of GABA(A) receptor in hippocampus were measured by fluorescence microscopy and western blot respectively.

Result: Compared with the normal group, the open field scores and GABA(A) Rbeta2 expression of PMS model rats with liver-qi invasion were increased significantly, and the distribution of GABA(A) receptor is more concentrated. However, the scores and GABA(A) beta2 expression of PMS BXD-administration group with liver-qi invasion were decreased markedly. Compared with the PMS model group the location had no significant change.

Conclusion: One of micro-mechanisms of PMS model rats with liver-qi invasion may be related with the high expression of GABA(A) Receptor beta2 subunit in hippocampus, and the Chinese medicinal formula, BXD granule, had an adjust on the above abnormal changes.