کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2065424 1076921 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Individual venom variability in the South American rattlesnake Crotalus durissus cumanensis
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیوشیمی، ژنتیک و زیست شناسی مولکولی (عمومی)
پیش نمایش صفحه اول مقاله
Individual venom variability in the South American rattlesnake Crotalus durissus cumanensis
چکیده انگلیسی

Crotalus durissus cumanensis snake venoms from different Venezuelan regions, showed biochemical and hemostatic variations. Fibrino(geno)lytic, hemorrhagic and procoagulant activities and gel-filtration chromatography and SDS-PAGE profiles were analyzed. Differences were observed in fibrinolytic activity: kallikrein-like amidolytic activity was highest in venoms of Santa Teresa, and Margarita. Lagunetica and Carrizales venoms showed the maximum fibrin lysis. The highest hemorrhagic activity was seen in Lagunetica venom. Margarita had the lowest LD50 of 0.18. Lagunetica, Carrizales and Anzoátegui induced a rapid degradation of fibrinogen α chains and slower degradation on β chains, which could possibly due to a higher content of α fibrinogenases in these venoms. This fibrinogenolytic activity is decreased by metalloprotease inhibitors. All venoms, except Carrizales, presented thrombin-like activity. Anzoátegui, Carrizales and Lagunetica, in which fibrinolytic activity was present, showed the largest concentration of high molecular mass components. These results represent a new finding, not previously described, of fibrinolytic activity in South American C. durissus venoms. Santa Teresa and Margarita had fibrinolytic activity, and lack of hemorrhagic activity, representing an important finding in Venezuelan venoms since the description of a fibrinolytic molecule without hemorrhagic activity can have valuable potential in thrombolytic therapy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Toxicon - Volume 50, Issue 2, August 2007, Pages 214–224
نویسندگان
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