[Effect of qihuang decoction on mRNA expressions of Bcl-2, Bax, and Caspase-3, 9 in intestinal mucosa epithelium of ischemia/reperfusion injured rats].

Objective: To observe the effect of Qihuang Decoction (QHD) on mRNA expression of apoptosis genes Bcl-2, Bax, and signal transduction molecules Caspase-3, 9 in intestinal mucosa epithelium of ischemia/ reperfusion (I/R) injured rats.

Methods: Forty Wistar rats were randomized equally into 4 groups, the control group, the model group, the glutamine group, and the QHD group. Rats in the latter two groups were gastric infused with glutamine and QHD respectively for 3 days, but saline was infused instead to rats in the control group and model group. After then, except those in the control group intervened only by sham operation, rats were made into I/R injured model by 45 min occlusion of superior mesenteric artery followed by 1 h reperfusion. Immediately after modeling, mRNA expressions of Bcl-2, Bax, Caspase-3, and Caspase-9 in intestinal mucosa epithelium of rats were detected by reverse transcription-polymerase chain reaction (RT-PCR).

Results: Compared with the control group, mRNA expressions of Bcl-2, Bax, Caspase-3 and Caspase-9 were higher in the other three groups (P < 0.05). Compared with the model group, Bcl-2 mRNA expression was higher, while the expressions of the other three indices were lower in both the glutamine group and the QHD group (P < 0.05); and comparisons between the glutamine group and the QHD group showed a more depressed Bax mRNA expression (0.281 +/- 0.087 vs 0.350 +/- 0.053) and higher Bcl-2/Bax ratio (1.648 vs 1. 374) in the QHD group.

Conclusions: QHD can reduce the I/R injury in the intestinal mucosa epithelium by inhibiting the cell apoptosis. The mechanism may be correlated with increased Bcl-2 mRNA expressions and decreased mRNA expressions of Bax, Caspase-3 and Caspase-9.