Aim To investigate the anticancer activity of two new cytotoxins from thevenom of Agkistrodon acutus. Methods The venom was isolated by FPLC column chromatography consistingof DEAE Sepharose FF and Source 30S. The cyt...Aim To investigate the anticancer activity of two new cytotoxins from thevenom of Agkistrodon acutus. Methods The venom was isolated by FPLC column chromatography consistingof DEAE Sepharose FF and Source 30S. The cytotoxic activity on tumor cells was detected by MITmethod. Purity and molecular weight were determined by SDS-PAGE (silver staining). Their stabilitiesto temperature and pH were also detected. Results Two pure cytotoxins named ACTX-6 and ACTX-8 wereobtained. Their molecular weights are 98 kDa and 27 kDa, respectively. ACTX-6 consists of twosubunits bonded together by disulfide bonds. Conclusion ACTX-6 and ATCX-8 have highest inhibitoryactivity on lung cancer cell A549. ACTX-6 is stable to heat while ACTX-8 not. ACTX-6 is stablebetween pH 7-9 and ACTX-8 between pH 6 - 9.展开更多
目的:探讨皖南产蝮蛇毒(AHV)蛋白C激活物(protein C activator,PCA)改善急性心肌梗死大鼠心功能作用与机制。方法:Sprague-Daw-ly大鼠60只,随机分为假手术(SH)组、心肌梗死模型(MI)组、PCA低、中、高剂量组(0.5、2、8mg/kg)、阳性对照组...目的:探讨皖南产蝮蛇毒(AHV)蛋白C激活物(protein C activator,PCA)改善急性心肌梗死大鼠心功能作用与机制。方法:Sprague-Daw-ly大鼠60只,随机分为假手术(SH)组、心肌梗死模型(MI)组、PCA低、中、高剂量组(0.5、2、8mg/kg)、阳性对照组(阿司匹林5mg/kg),每组10只。通过结扎冠状动脉前降支建立急性心肌梗死(AMI)模型,采用Medlab生物信号处理系统监测大鼠心脏血流动力学变化。Westernblot检测心肌基质金属蛋白酶-9(MMP-9)蛋白表达;光镜观察心肌组织学改变。结果:与心肌梗死组比较,PCA高、中剂量大鼠左室内压最低值(LVDP)、左心室舒张末期压(LVEDP)、左心室压力最大上升速率(+dp/dtmax)、左心室压力最大下降速率(-dp/dtmax)明显升高(P<0.05),MMP-9的蛋白表达下降(P<0.05)。病理观察显示PCA干预组较梗死模型组炎症细胞浸润显著减轻,梗死面积缩小。结论:蝮蛇毒PCA组分可以限制急性心肌梗死早期心肌梗死扩大,有效改善心脏血液动力学,抑制MMP-9表达,对急性心肌梗死后心室重构有一定的干预作用。展开更多
Anticoagulant activity was examined by activated partial thromboplastin time assay, and the activatedprotein C-specific amidolytic activity was examined with chromogenic peptide substrate (Pefachrome? PCa). After scre...Anticoagulant activity was examined by activated partial thromboplastin time assay, and the activatedprotein C-specific amidolytic activity was examined with chromogenic peptide substrate (Pefachrome? PCa). After screening8 species of Chinese snake venoms for the above two activities, it was found that Agkistrodon halys venom might containthe activated protein C like enzyme.展开更多
文摘Aim To investigate the anticancer activity of two new cytotoxins from thevenom of Agkistrodon acutus. Methods The venom was isolated by FPLC column chromatography consistingof DEAE Sepharose FF and Source 30S. The cytotoxic activity on tumor cells was detected by MITmethod. Purity and molecular weight were determined by SDS-PAGE (silver staining). Their stabilitiesto temperature and pH were also detected. Results Two pure cytotoxins named ACTX-6 and ACTX-8 wereobtained. Their molecular weights are 98 kDa and 27 kDa, respectively. ACTX-6 consists of twosubunits bonded together by disulfide bonds. Conclusion ACTX-6 and ATCX-8 have highest inhibitoryactivity on lung cancer cell A549. ACTX-6 is stable to heat while ACTX-8 not. ACTX-6 is stablebetween pH 7-9 and ACTX-8 between pH 6 - 9.
文摘目的:探讨皖南产蝮蛇毒(AHV)蛋白C激活物(protein C activator,PCA)改善急性心肌梗死大鼠心功能作用与机制。方法:Sprague-Daw-ly大鼠60只,随机分为假手术(SH)组、心肌梗死模型(MI)组、PCA低、中、高剂量组(0.5、2、8mg/kg)、阳性对照组(阿司匹林5mg/kg),每组10只。通过结扎冠状动脉前降支建立急性心肌梗死(AMI)模型,采用Medlab生物信号处理系统监测大鼠心脏血流动力学变化。Westernblot检测心肌基质金属蛋白酶-9(MMP-9)蛋白表达;光镜观察心肌组织学改变。结果:与心肌梗死组比较,PCA高、中剂量大鼠左室内压最低值(LVDP)、左心室舒张末期压(LVEDP)、左心室压力最大上升速率(+dp/dtmax)、左心室压力最大下降速率(-dp/dtmax)明显升高(P<0.05),MMP-9的蛋白表达下降(P<0.05)。病理观察显示PCA干预组较梗死模型组炎症细胞浸润显著减轻,梗死面积缩小。结论:蝮蛇毒PCA组分可以限制急性心肌梗死早期心肌梗死扩大,有效改善心脏血液动力学,抑制MMP-9表达,对急性心肌梗死后心室重构有一定的干预作用。
文摘Anticoagulant activity was examined by activated partial thromboplastin time assay, and the activatedprotein C-specific amidolytic activity was examined with chromogenic peptide substrate (Pefachrome? PCa). After screening8 species of Chinese snake venoms for the above two activities, it was found that Agkistrodon halys venom might containthe activated protein C like enzyme.
