Scorpion venom neurotoxins and other venom antigens from North African species (SVN) (SVN)

Scorpion venom neurotoxins from North African species, primarily from the Buthidae family (e.g., Androctonus and Leiurus), are potent peptides that target voltage-gated ion channels (Ismail, 1995). These toxins, including alpha- and beta-toxins, disrupt the normal function of sodium and potassium channels, leading to massive neurotransmitter release and an "autonomic storm" (UniProt, 2023). Clinically, envenomation results in severe symptoms such as hypertension, pulmonary edema, and potentially fatal cardiovascular collapse (Ghalim et al., 2000). Therapeutic intervention relies on antivenoms, which consist of purified antibodies or antibody fragments that bind and neutralize these venom antigens in the bloodstream (WHO, 2010). Because these toxins are small and rapidly distribute into tissues, timely administration of antivenom is critical for efficacy. Research continues into developing more specific recombinant antibodies to improve safety and reduce the risk of serum sickness associated with traditional equine-derived products (Laustsen et al., 2016). The high diversity of toxins across North African species necessitates the use of polyvalent antivenoms to ensure broad coverage against various Buthidae venoms.

Other names

North African scorpion toxinsButhidae venom antigensAndroctonus toxinsLeiurus toxinsButhus toxinsScorpion neurotoxins

Passive immunization through the administration of specific antibodies (typically F(ab')2 fragments) that bind to and neutralize circulating venom neurotoxins, preventing their interaction with voltage-gated sodium and potassium channels.