目的探讨地鳖纤溶活性蛋白(fibrinolytic protein from Eupolyphaga sinensis Walker,EFP)对H22荷瘤小鼠的抑瘤功效。方法采用水提取法对地鳖进行成分分离;皮下接种肿瘤细胞建立荷瘤小鼠动物模型;灌胃和皮下注射法观察EFP的抑瘤作用;EL...目的探讨地鳖纤溶活性蛋白(fibrinolytic protein from Eupolyphaga sinensis Walker,EFP)对H22荷瘤小鼠的抑瘤功效。方法采用水提取法对地鳖进行成分分离;皮下接种肿瘤细胞建立荷瘤小鼠动物模型;灌胃和皮下注射法观察EFP的抑瘤作用;ELISA法检测血清抗H22抗体水平;记录各组体重变化、脾脏和胸腺等免疫器官的器官系数,检测肝脏丙二醛(MDA)水平、肝脏超氧化物歧化酶(SOD)活性、肝脏谷丙转氨酶(GPT)和谷草转氨酶(GOT)以及血清谷丙转氨酶(GPT)活力等生理生化指标。结果EFP具有明显的抑瘤活性。经EFP灌胃和皮下注射后的荷瘤小鼠,与对照组荷瘤小鼠相比其胸腺指数、脾指数明显增加;抗H22抗体水平以及MDA、SOD、GPT、GOT活性明显增加;肿瘤生长缓慢。结论EFP是地鳖抗肿瘤作用的主要有效成分,EFP在动物体内具有抗肿瘤作用,能通过增强荷瘤小鼠参与免疫抗体以及相关酶的活性而发挥抗肿瘤作用。展开更多
To study the changes of the expression of growth-associated protein-43 (GAP-43) and pathology in temporal infarction of rats photochemically induced and the effects of batroxobin. METHODS: Immunohistochemical techniqu...To study the changes of the expression of growth-associated protein-43 (GAP-43) and pathology in temporal infarction of rats photochemically induced and the effects of batroxobin. METHODS: Immunohistochemical technique and hematoxylin-eosin stain was used to show the changes of the expression of GAP-43 and pathology. RESULTS: In infarction group, GAP-43 expression was markedly increased on the infarction and surrounding tissues at 24 h cerebral infarction. The expression reached peak level at 72 h after cerebral infarction and was decreased at 7 d after cerebral infarction. However, in batroxobin-treated group, GAP-43 expression was increased and the pathological changes were much slight as compared with infarction group. CONCLUSION: The expression of GAP-43 increases in infarction of temporal neocortex and batroxobin promotes the expression of GAP-43 and ameliorates the pathological changes in infarction of temporal neocortex.展开更多
Plant endophytes are among the most important resources of biologically active metabolites. Twenty-three endophyte strains residing in Trachelospermum jasminoides were cultivated in vitro with the cultures assayed for...Plant endophytes are among the most important resources of biologically active metabolites. Twenty-three endophyte strains residing in Trachelospermum jasminoides were cultivated in vitro with the cultures assayed for the fibrinolytic substance production. As a result, the culture of VerticUlium sp. Tj33 was shown to be the most active. A fibrinolytic enzyme designated as verticase was subsequently purified from the supernatant of Verticillium sp. culture broth by a combination of DEAE-52, Sephadex G-75 and hydrophobic column chromatographies. Verticase, with its molecular mass of 31 kDa and pl of 8.5, was demonstrated to be homogeneous by sodium dodecyl suIfate-polyacrylamide gel electrophoresis and isoelectric focusing electrophoresis. Verticase is an enzyme that hydrolyzes fibrin directly without activation of plaminogen. It was stable in a broad pH range from 4 through to 11 with the optimal reaction pH value and temperature shown to be around 9-10 and 50-60℃, respectively. The fibrinolytic activity of verticase was severely inhibited by phenylmethylsulfony fluoride, indicating that verticase was a serine protease.展开更多
BACKGROUND：Pancreatic stellate cells（PSCs）play a critical role in the development of pancreatic fibrosis.In this study we used a novel method to isolate and culture rat PSCs and then investigated the inhibitory eff...BACKGROUND：Pancreatic stellate cells（PSCs）play a critical role in the development of pancreatic fibrosis.In this study we used a novel method to isolate and culture rat PSCs and then investigated the inhibitory effects of adipose-derived stem cells（ADSCs）on activation and proliferation of PSCs.METHODS：Pancreatic tissue was obtained from SpragueDawley rats for PSCs isolation.Transwell cell cultures were adopted for co-culture of ADSCs and PSCs. PSCs prolifera- tion and apoptosis were determined using CCK-8 and flow cytometry, respectively, a-SMA expressions were analyzed using Western blotting. The levels of cytokines [nerve growth factor （NGF）, interleukin-10 （IL-10） and transforming growth factor-ill （TGF-[31）] in conditioned medium were detected by ELISA. Gene expression （MMP-2, MMP-9 and TIMP-1） was analyzed using qRT-PCR. RESULTS： This method produced 17.6_＋6.5 ~ 103 ceils per gram of the body weight with a purity of 90%-95% and a viability of 92%-97%. Co-culture of PSCs with ADSCs significantly inhib- ited PSCs proliferation and induced PSCs apoptosis. Moreover, a-SMA expression was significantly reduced in PSCs＋ADSCs compared with that in PSC-only cultures, while expression of fibrinolytic proteins （e.g., MMP-2 and MMP-9） was upregulated and anti-fibrinolytic protein （TIMP-1） was downregulated. In addition, NGF expression was up-regulated, but IL-10 and TGF-β1 expressions were down-regulated in the coculture conditioned medium compared with those in the PSC- only culture medium. CONCLUSIONS： This study provided an easy and reliable technique to isolate PSCs. The data demonstrated the inhibitory effects of ADSCs on the activation and proliferation of PSCs in vitro.展开更多
文摘目的探讨地鳖纤溶活性蛋白(fibrinolytic protein from Eupolyphaga sinensis Walker,EFP)对H22荷瘤小鼠的抑瘤功效。方法采用水提取法对地鳖进行成分分离;皮下接种肿瘤细胞建立荷瘤小鼠动物模型;灌胃和皮下注射法观察EFP的抑瘤作用;ELISA法检测血清抗H22抗体水平;记录各组体重变化、脾脏和胸腺等免疫器官的器官系数,检测肝脏丙二醛(MDA)水平、肝脏超氧化物歧化酶(SOD)活性、肝脏谷丙转氨酶(GPT)和谷草转氨酶(GOT)以及血清谷丙转氨酶(GPT)活力等生理生化指标。结果EFP具有明显的抑瘤活性。经EFP灌胃和皮下注射后的荷瘤小鼠,与对照组荷瘤小鼠相比其胸腺指数、脾指数明显增加;抗H22抗体水平以及MDA、SOD、GPT、GOT活性明显增加;肿瘤生长缓慢。结论EFP是地鳖抗肿瘤作用的主要有效成分,EFP在动物体内具有抗肿瘤作用,能通过增强荷瘤小鼠参与免疫抗体以及相关酶的活性而发挥抗肿瘤作用。
文摘To study the changes of the expression of growth-associated protein-43 (GAP-43) and pathology in temporal infarction of rats photochemically induced and the effects of batroxobin. METHODS: Immunohistochemical technique and hematoxylin-eosin stain was used to show the changes of the expression of GAP-43 and pathology. RESULTS: In infarction group, GAP-43 expression was markedly increased on the infarction and surrounding tissues at 24 h cerebral infarction. The expression reached peak level at 72 h after cerebral infarction and was decreased at 7 d after cerebral infarction. However, in batroxobin-treated group, GAP-43 expression was increased and the pathological changes were much slight as compared with infarction group. CONCLUSION: The expression of GAP-43 increases in infarction of temporal neocortex and batroxobin promotes the expression of GAP-43 and ameliorates the pathological changes in infarction of temporal neocortex.
基金Supported by a Key Grant from the Ministry of Education(104195)a Grant from China Postdoctoral Science Foundation(2003033482).
文摘Plant endophytes are among the most important resources of biologically active metabolites. Twenty-three endophyte strains residing in Trachelospermum jasminoides were cultivated in vitro with the cultures assayed for the fibrinolytic substance production. As a result, the culture of VerticUlium sp. Tj33 was shown to be the most active. A fibrinolytic enzyme designated as verticase was subsequently purified from the supernatant of Verticillium sp. culture broth by a combination of DEAE-52, Sephadex G-75 and hydrophobic column chromatographies. Verticase, with its molecular mass of 31 kDa and pl of 8.5, was demonstrated to be homogeneous by sodium dodecyl suIfate-polyacrylamide gel electrophoresis and isoelectric focusing electrophoresis. Verticase is an enzyme that hydrolyzes fibrin directly without activation of plaminogen. It was stable in a broad pH range from 4 through to 11 with the optimal reaction pH value and temperature shown to be around 9-10 and 50-60℃, respectively. The fibrinolytic activity of verticase was severely inhibited by phenylmethylsulfony fluoride, indicating that verticase was a serine protease.
基金supported in part by a grant from Zhejiang Province Key Surgery Projects(Zhejiang High-Tech 2008-255)
文摘BACKGROUND：Pancreatic stellate cells（PSCs）play a critical role in the development of pancreatic fibrosis.In this study we used a novel method to isolate and culture rat PSCs and then investigated the inhibitory effects of adipose-derived stem cells（ADSCs）on activation and proliferation of PSCs.METHODS：Pancreatic tissue was obtained from SpragueDawley rats for PSCs isolation.Transwell cell cultures were adopted for co-culture of ADSCs and PSCs. PSCs prolifera- tion and apoptosis were determined using CCK-8 and flow cytometry, respectively, a-SMA expressions were analyzed using Western blotting. The levels of cytokines [nerve growth factor （NGF）, interleukin-10 （IL-10） and transforming growth factor-ill （TGF-[31）] in conditioned medium were detected by ELISA. Gene expression （MMP-2, MMP-9 and TIMP-1） was analyzed using qRT-PCR. RESULTS： This method produced 17.6_＋6.5 ~ 103 ceils per gram of the body weight with a purity of 90%-95% and a viability of 92%-97%. Co-culture of PSCs with ADSCs significantly inhib- ited PSCs proliferation and induced PSCs apoptosis. Moreover, a-SMA expression was significantly reduced in PSCs＋ADSCs compared with that in PSC-only cultures, while expression of fibrinolytic proteins （e.g., MMP-2 and MMP-9） was upregulated and anti-fibrinolytic protein （TIMP-1） was downregulated. In addition, NGF expression was up-regulated, but IL-10 and TGF-β1 expressions were down-regulated in the coculture conditioned medium compared with those in the PSC- only culture medium. CONCLUSIONS： This study provided an easy and reliable technique to isolate PSCs. The data demonstrated the inhibitory effects of ADSCs on the activation and proliferation of PSCs in vitro.
