Venom toxins from Echis ocellatus, Bitis arietans, and Naja nigricollis

The target 'Other venom toxins from Echis ocellatus, Bitis arietans, and Naja nigricollis' refers to the complex mixture of bioactive proteins and peptides found in the venoms of three medically significant African snakes: the West African carpet viper, the puff adder, and the black-necked spitting cobra [WHO Snakebite Fact Sheet]. These venoms contain several major molecular classes, including snake venom metalloproteinases (SVMPs), serine proteases, phospholipases A2 (PLA2s), and three-finger toxins (3FTxs) [UniProt]. Biologically, these toxins act synergistically to immobilize prey and initiate digestion by causing systemic hemorrhage, consumptive coagulopathy, and extensive local tissue necrosis [PubMed: 25463111]. In a clinical context, these toxins are the primary targets for polyvalent antivenoms, such as EchiTAb-Plus-ICP, which utilize purified antibodies to bind and neutralize the venom's pathological effects [The Lancet]. The therapeutic challenge in treating envenomation from these species lies in the high degree of venom variability and the need for rapid administration of potent, cross-reactive antivenoms to prevent permanent disability or death [Toxins Journal].

Other names

Echis ocellatus venomBitis arietans venomNaja nigricollis venomWest African carpet viper toxinsPuff adder toxinsBlack-necked spitting cobra toxinsAfrican snake venom proteins

Antivenom antibodies bind to specific epitopes on the venom toxins, sterically hindering their interaction with physiological substrates or receptors and facilitating their clearance from circulation [PubMed: 28946615].