RESUMEN
This study is to investigate the protective effects of the SB203580 against radiation induced mortality and intestinal injury of mice. A total of 67 male C57BL/6 mice (20.0-22.0 g) were matched according to body weight and randomly assigned to one of three groups: control, total body irradiation exposure (IR, 7.2 Gy) only, and IR (7.2 Gy) + SB203580 (15 mg x kg(-1)). 30 days survival rate was observed in the experiment. In intestinal injury experiment, the expression levels of caspase-3, Ki67, p53 and p-p38 were assayed in the mice intestine crypts. The results showed that the 30 days survival rate was 100% (control), 0 (IR) and 40% (IR+ SB203580), separately. Compared to the IR groups, the positive cells of caspase-3, p53 and p-p38 in crypt cells decreased 33.00%, 21.78% and 34.63%, respectively. The rate of positive cells of Ki67 increased 37.96%. Significant difference was found between all of them (P < 0.01). SB203580 potently protected against radiation-induced lethal and intestinal injury in mice, and it may be a potential radio protector.
Asunto(s)
Animales , Masculino , Ratones , Apoptosis , Efectos de la Radiación , Caspasa 3 , Metabolismo , Inhibidores Enzimáticos , Farmacología , Imidazoles , Farmacología , Intestinos , Metabolismo , Patología , Antígeno Ki-67 , Metabolismo , Ratones Endogámicos C57BL , Piridinas , Farmacología , Traumatismos Experimentales por Radiación , Metabolismo , Mortalidad , Patología , Protectores contra Radiación , Farmacología , Distribución Aleatoria , Proteína p53 Supresora de Tumor , Metabolismo , Irradiación Corporal Total , Proteínas Quinasas p38 Activadas por Mitógenos , MetabolismoRESUMEN
<p><b>OBJECTIVE</b>To extract and analysis the active components of Se-protein polysaccharide from Se-rich Cordyceps militaris, and to discuss the anti-tumor effect of Se-protein polysaccharide.</p><p><b>METHOD</b>Protein, polysaccharides and selenium content were determined by the methods of Folin-phenol reagent (lowry), phenol-sulfate and DAN fluorescence, respectively. Tumor-bearing mouse model was established and divided into the model group, cyclophosphamide group, cordyceps high and low dosage group (200, 100 mg x kg(-1)). Then the Se-protein polysaccharide's anti-tumor activity and immune function in vivo were observed by compare with model group in the weight of mice, inhibitory rate, conversion rate of peripheral blood lymphocytes, dissection index K, swallowed factor alpha, liver and spleen factor coefficient, GSH-Px and SOD activity and the content of MDA.</p><p><b>RESULT</b>Se-protein polysaccharides from Se-rich Cordyceps militaris had a significant anti-tumor action with the inhibitory rate 46.92% and could avoid toxic effect of chemotherapy drug like cyclophosphamide. It also could enhance immune function and body antioxidant capacity by inhibiting the decline of tumor-bearing mouse liver coefficient and spleen coefficient in tumor-bearing mice caused by cyclophosphamide.</p><p><b>CONCLUSION</b>Se-protein polysaccharide, the extraction of Se-rich Cordyceps militaris's can inhibit tumor grouth of tumor-bearing mouse.</p>