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Loxosceles venom comprises a mixture of diverse toxins that induces intense local inflammatory reaction, dermonecrotic injury, platelet aggregation, hemolytic anemia and acute renal failure. Among several toxins in the venom, phospholipases D (PLDs), also called dermonecrotic toxins, are the most important and best studied, since they account for the main effects observed in loxoscelism. Despite their...
Snake venom metalloproteinases (SVMP) are abundant toxins in venoms of viper snakes and play a relevant role in the complex and multifactorial tissue damage characteristic of Viperidae envenoming. Jararhagin, a SVMP isolated from Bothrops jararaca venom, induces a fast onset hemorrhagic lesions acting directly on the capillary vessels, which are disrupted by toxin adhesion and degradation of extracellular...
Insularin (INS) was obtained from Bothrops insularis venom by reversed-phase highperformance liquid chromatography using a C 18 column and characterized as a disintegrin by peptide mass fingerprint and inhibition of ADP-induced platelet aggregation. A cDNA coding for P-II a metalloproteinase/disintegrin was cloned from a cDNA library from B. insularis venom glands. The deduced protein sequence...
SVMPs are multi-domain proteolytic enzymes in which disintegrin-like and cysteine-rich domains bind to cell receptors, plasma or ECM proteins. We have recently reported that jararhagin, a P-III class SVMP, binds to collagen with high affinity through an epitope located within the Da-disintegrin sub-domain. In this study, we evaluated the binding of jararhagin to α 2 β 1 integrin (collagen...
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