Objective:To examine the downregulalion of proinflammatory cytokines in a time dependant manner on carbon tetrachloride induced toxicity in experimental animals.Methods:CCl<sub>4</sub>(150μL/100 g) was ...Objective:To examine the downregulalion of proinflammatory cytokines in a time dependant manner on carbon tetrachloride induced toxicity in experimental animals.Methods:CCl<sub>4</sub>(150μL/100 g) was dissolved in com oil(1:1 v/v%) and administered orally,GroupⅠwas treated as normal control and received corn oil on 8th day.GroupⅡwas toxic control and was given a single dose of CCl<sub>4</sub> on 8th days.GroupⅢwas treated with Lygodium flexuosum(L.flexuosum) n-hexane extract(200 mg/kg) for 8 days and on 8th day a single dose of CCl<sub>4</sub> was received.GroupⅣ(negative contnil) received L.flexuosiim n-hexane extract(200 mg/kg) alone for 8 days.Results:Treatment with n-hexane extract prior to the administration of CCl<sub>4</sub> significantly prevented an increase in serum AST,ALT,LDH activity and lipid peroxidation and prevented the depletion of glutathione (GSH).Rats treated with L.flexuosum had reduced mRNA levels of TGF-β1,TNF-αand IL-1βgenes in liver of CCl<sub>4</sub> intoxicated rats when compared to CCl<sub>4</sub> control as evidenced by RT-PCR. Conclusions:The data suggest that L.flexuosum,a widely available fem,significantly reduces CCl<sub>4</sub> induced acute hepatotoxicily by down-regulating the expression of pro-inflammatory cytokines in rats.展开更多
以文心兰Oncidium flexuosum无菌苗叶片为外植体,1/2MS(Murashige and Skoog)为基本培养基,对不同叶位、叶片大小(叶龄)、不同植物生长调节物质处理诱导体胚的效果进行了研究。结果表明:①幼苗的叶尖、叶基部切口、叶面切口、叶面和叶...以文心兰Oncidium flexuosum无菌苗叶片为外植体,1/2MS(Murashige and Skoog)为基本培养基,对不同叶位、叶片大小(叶龄)、不同植物生长调节物质处理诱导体胚的效果进行了研究。结果表明:①幼苗的叶尖、叶基部切口、叶面切口、叶面和叶缘均能诱导出体胚,绝大部分体胚能形成二次体胚并能分化成多个类原球茎(PLBs)。②诱导体胚的最佳外植体材料是取自带根幼苗15mm长叶片。③诱导体胚的适宜培养基组成如下:1/2MS培养基(其中微量元素和有机添加物为全量,铁盐减半),磷酸二氢钠170.00mg·L-1,谷胺酰胺1000.00mg·L-1,蛋白胨1000.00mg·L-1,噻苯隆(TDZ)0.50mg·L-1,聚乙烯聚吡咯烷酮(PVPP)250.00mg·L-1,蔗糖20000.00mg·L-1,固化剂(gelrite)2800.00mg·L-1,pH5.2。叶片体胚诱导率为90.00%以上,叶片基部切口和中切口体胚诱导率分别达74.56%和66.91%。展开更多
基金supported by grants from kerala Forest Department, kerala India Financial assistance from Council of Scientific and Industrial Research(CSIR),New Delhi as Senior Research Fellowship to PJ Wills
文摘Objective:To examine the downregulalion of proinflammatory cytokines in a time dependant manner on carbon tetrachloride induced toxicity in experimental animals.Methods:CCl<sub>4</sub>(150μL/100 g) was dissolved in com oil(1:1 v/v%) and administered orally,GroupⅠwas treated as normal control and received corn oil on 8th day.GroupⅡwas toxic control and was given a single dose of CCl<sub>4</sub> on 8th days.GroupⅢwas treated with Lygodium flexuosum(L.flexuosum) n-hexane extract(200 mg/kg) for 8 days and on 8th day a single dose of CCl<sub>4</sub> was received.GroupⅣ(negative contnil) received L.flexuosiim n-hexane extract(200 mg/kg) alone for 8 days.Results:Treatment with n-hexane extract prior to the administration of CCl<sub>4</sub> significantly prevented an increase in serum AST,ALT,LDH activity and lipid peroxidation and prevented the depletion of glutathione (GSH).Rats treated with L.flexuosum had reduced mRNA levels of TGF-β1,TNF-αand IL-1βgenes in liver of CCl<sub>4</sub> intoxicated rats when compared to CCl<sub>4</sub> control as evidenced by RT-PCR. Conclusions:The data suggest that L.flexuosum,a widely available fem,significantly reduces CCl<sub>4</sub> induced acute hepatotoxicily by down-regulating the expression of pro-inflammatory cytokines in rats.
文摘以文心兰Oncidium flexuosum无菌苗叶片为外植体,1/2MS(Murashige and Skoog)为基本培养基,对不同叶位、叶片大小(叶龄)、不同植物生长调节物质处理诱导体胚的效果进行了研究。结果表明:①幼苗的叶尖、叶基部切口、叶面切口、叶面和叶缘均能诱导出体胚,绝大部分体胚能形成二次体胚并能分化成多个类原球茎(PLBs)。②诱导体胚的最佳外植体材料是取自带根幼苗15mm长叶片。③诱导体胚的适宜培养基组成如下:1/2MS培养基(其中微量元素和有机添加物为全量,铁盐减半),磷酸二氢钠170.00mg·L-1,谷胺酰胺1000.00mg·L-1,蛋白胨1000.00mg·L-1,噻苯隆(TDZ)0.50mg·L-1,聚乙烯聚吡咯烷酮(PVPP)250.00mg·L-1,蔗糖20000.00mg·L-1,固化剂(gelrite)2800.00mg·L-1,pH5.2。叶片体胚诱导率为90.00%以上,叶片基部切口和中切口体胚诱导率分别达74.56%和66.91%。