OBJECTIVE Rheumatoid arthritis(RA)is the most common inflammatory autoimmune disease,affecting around 1% of the world population.Toll-like receptor 4(TLR4)signalling has been found to be involved in the pathogenesis o...OBJECTIVE Rheumatoid arthritis(RA)is the most common inflammatory autoimmune disease,affecting around 1% of the world population.Toll-like receptor 4(TLR4)signalling has been found to be involved in the pathogenesis of RA.It is a potential therapeutic target for RA treatment.A herbal formula(RL)consisting of Rosae Multiflorae Fructus and Lonicerae Japonicae Flos has traditionally been used in treating various inflammatory disorders.In this study,we would evaluate the anti-arthritic effect of RL on collagen-induced arthritis(CIA)in rats and investigate the involvement of TLR4 signaling in the mode of action of RL in vivo and in vitro.METHODS In vivo anti-arthritic efficacy was evaluated using CIA rats induced by bovine typeⅡ collagen.The treatment groups were treated with various concentrations of RL or positive control indomethacin for 35 d.Clinical signs(hind paw volume and arthritis severity scores),changes in serum inflammatory mediators,histological and radiographic changes of joints were investigated.Spleens and peritoneal macrophages were used to determine the effects of RL on innate and adaptive immune responses in CIA rats.The involvement of TLR4 signalling pathways in the anti-arthritic effect of RL was examined in cartilage tissue of CIA rats,murine RAW264.7macrophages and human THP-1 monocytic cells.RESULTS The severity of arthritis in the CIA rats was significantly attenuated by RL.Histological score and radiographic score were efficiently improved by RL.RL could also dose-dependently inhibit pro-inflammatory cytokines in serum of CIA rats.RL significantly inhibited the production of various pro-inflammatory mediators,the expression and/or activity of the components of TLR4 signalling pathways in animal tissue and cell lines.CONCLUSION RL possesses anti-arthritic effect on collagen-induced arthritis in rats.The therapeutic effect of RL may be related to its inhibition on pro-inflammatory cytokines in serum.The inhibition of the TLR4/TAK1/NF-κB and TLR4/TAK1/MAPK pathways participate in the anti-arthritic effects of RL.This provides a pharmacological justification for the use of RL in the control of various arthritic diseases.Further investigation should be done to develop RL into a modern anti-arthritic agent.展开更多
根据总RNA完整性、纯度和得率筛选出适合多花蔷薇幼嫩根、叶总RNA的提取方法.结果表明,以CTAB/酸酚法提取的扦插苗根系总RNA、以LiCl-尿素法提取的扦插苗根、叶总RNA以及采用RNeasy Plant Mini Kit试剂盒的改进方法提取的组培苗嫩叶总RN...根据总RNA完整性、纯度和得率筛选出适合多花蔷薇幼嫩根、叶总RNA的提取方法.结果表明,以CTAB/酸酚法提取的扦插苗根系总RNA、以LiCl-尿素法提取的扦插苗根、叶总RNA以及采用RNeasy Plant Mini Kit试剂盒的改进方法提取的组培苗嫩叶总RNA电泳有清晰明亮的28S、18S条带,无降解;其A260/A280值为1.73～2.04,表明总RNA质量好.RT-PCR结果进一步证实所提取的总RNA能够用于分子生物学的各种下游实验.RNA得率分别为:根系和组培苗嫩叶120-140μg/g(fw),扦插苗嫩叶190-230μg/g(fw).CTAB/酸酚法提取的嫩叶总RNA、SDS/酸酚法提取的根、叶总RNA有多糖污染,且有明显降解.Total RNA isolation system(Z5111,Promega)试剂盒不适合提取多花蔷薇各组织总RNA.展开更多
目的:优化野蔷薇根总黄酮提取及纯化工艺。方法:L9(34)正交试验回流提取确定最适提取剂乙醇浓度、料液比、提取时间组合;从静态吸附-解吸、动态吸附-解吸两方面筛选最佳树脂型号,单因素考察最佳纯化条件。结果:UV 508 nm检测波长下,最...目的:优化野蔷薇根总黄酮提取及纯化工艺。方法:L9(34)正交试验回流提取确定最适提取剂乙醇浓度、料液比、提取时间组合;从静态吸附-解吸、动态吸附-解吸两方面筛选最佳树脂型号,单因素考察最佳纯化条件。结果:UV 508 nm检测波长下,最佳提取条件为50%乙醇溶剂,料液比1∶10,进行90℃、90 min回流提取;14种大孔树脂中,HPD-400型大孔树脂对野蔷薇根总黄酮的吸附-解吸能力最好,树脂纯化最佳上样浓度为浸膏母液稀释1.5倍;上样量35 m L,流速3 s/滴;除杂用水量40 m L,流速1 s/滴;50%乙醇32 m L洗脱,流速2 s/滴。结论:最优提取纯化条件下,总黄酮回收率达50%以上。展开更多
基金The project supported by Science,Technology and Innovation Commission of Shenzhen(JCYJ20120829154222473and JCYJ20140807091945050)Research Grants Council of Hong Kong(HKBU 262512)+1 种基金Food and Health Bureau of Hong Kong(HMRF 11122521)Hong Kong Baptist University(FRG2/14-15/056,FRG1/14-15/061)
文摘OBJECTIVE Rheumatoid arthritis(RA)is the most common inflammatory autoimmune disease,affecting around 1% of the world population.Toll-like receptor 4(TLR4)signalling has been found to be involved in the pathogenesis of RA.It is a potential therapeutic target for RA treatment.A herbal formula(RL)consisting of Rosae Multiflorae Fructus and Lonicerae Japonicae Flos has traditionally been used in treating various inflammatory disorders.In this study,we would evaluate the anti-arthritic effect of RL on collagen-induced arthritis(CIA)in rats and investigate the involvement of TLR4 signaling in the mode of action of RL in vivo and in vitro.METHODS In vivo anti-arthritic efficacy was evaluated using CIA rats induced by bovine typeⅡ collagen.The treatment groups were treated with various concentrations of RL or positive control indomethacin for 35 d.Clinical signs(hind paw volume and arthritis severity scores),changes in serum inflammatory mediators,histological and radiographic changes of joints were investigated.Spleens and peritoneal macrophages were used to determine the effects of RL on innate and adaptive immune responses in CIA rats.The involvement of TLR4 signalling pathways in the anti-arthritic effect of RL was examined in cartilage tissue of CIA rats,murine RAW264.7macrophages and human THP-1 monocytic cells.RESULTS The severity of arthritis in the CIA rats was significantly attenuated by RL.Histological score and radiographic score were efficiently improved by RL.RL could also dose-dependently inhibit pro-inflammatory cytokines in serum of CIA rats.RL significantly inhibited the production of various pro-inflammatory mediators,the expression and/or activity of the components of TLR4 signalling pathways in animal tissue and cell lines.CONCLUSION RL possesses anti-arthritic effect on collagen-induced arthritis in rats.The therapeutic effect of RL may be related to its inhibition on pro-inflammatory cytokines in serum.The inhibition of the TLR4/TAK1/NF-κB and TLR4/TAK1/MAPK pathways participate in the anti-arthritic effects of RL.This provides a pharmacological justification for the use of RL in the control of various arthritic diseases.Further investigation should be done to develop RL into a modern anti-arthritic agent.
文摘目的:优化野蔷薇根总黄酮提取及纯化工艺。方法:L9(34)正交试验回流提取确定最适提取剂乙醇浓度、料液比、提取时间组合;从静态吸附-解吸、动态吸附-解吸两方面筛选最佳树脂型号,单因素考察最佳纯化条件。结果:UV 508 nm检测波长下,最佳提取条件为50%乙醇溶剂,料液比1∶10,进行90℃、90 min回流提取;14种大孔树脂中,HPD-400型大孔树脂对野蔷薇根总黄酮的吸附-解吸能力最好,树脂纯化最佳上样浓度为浸膏母液稀释1.5倍;上样量35 m L,流速3 s/滴;除杂用水量40 m L,流速1 s/滴;50%乙醇32 m L洗脱,流速2 s/滴。结论:最优提取纯化条件下,总黄酮回收率达50%以上。
