RESUMO
In this study, extraction yield of Eucommia ulmoides polysaccharides was optimized by the utilization of response surface methodology (RSM). Based on contour plots and variance analysis, optimum operational conditions for maximizing extraction yield were found to be extraction time 80 min, ratio of water to raw material 3, and extraction number 3. Then, we investigated the protective effect of the E. ulmoides polysaccharides on the tissue peroxidative damage and abnormal antioxidant levels in ischemia reperfusion (IR) induced renal toxicity in male albino rabbits. Decrease in all the enzymes (superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px), glutathione reductase (GR)) and non-enzymatic antioxidant (glutathione (GSH)), along with an increase in the lipid peroxidative index (malondialdehyde) was found in all the renal ischemia reperfusion (RIR) rabbits as compared with normal controls. The findings indicate that the extract of E. ulmoides polysaccharides can protect the kidney against IR induced oxidative damage in rabbits.
Assuntos
Antioxidantes/isolamento & purificação , Antioxidantes/farmacologia , Fracionamento Químico/métodos , Eucommiaceae/química , Polissacarídeos/isolamento & purificação , Polissacarídeos/farmacologia , Animais , Citoproteção/efeitos dos fármacos , Rim/citologia , Rim/efeitos dos fármacos , Rim/metabolismo , Masculino , Estresse Oxidativo/efeitos dos fármacos , Coelhos , Traumatismo por Reperfusão/metabolismo , Traumatismo por Reperfusão/patologiaRESUMO
OBJECTIVE: To study the effect of varicocel (VC) on expression of apoptosis associated gene Bcl-2 and Bax in spermatogenic cells of adolescent rats, and investigate the mechanism of the infertility resulting from varicocele. METHODS: The varicocele model was created by partial ligation of the left renal vein in the adolescent rats, two and four and eight weeks after creation of the varicocele model, the expressions of Bcl-2 and Bax were detected by immunohistochemical method. RESULTS: With the duration of varicocele model, the Bcl-2 expression in experiment group was decreased as compared with that in control group. And in experiment group, the Bcl-2 expression level was lower in left testis than in right testis. But Bax expression in experiment group was increased as compared with that in control group, and in experiment group, the Bax expression level was higher in left testis than in right testis. CONCLUSION: Experimental varicocele could change obviously expression of apoptosis associated gene Bcl-2 and Bax in spermatogenic cells of adolescent rats.
