Snake Venom Protection By A Cocktail Of Varespladib And Broadly Neutralizing Human Antibodies Jacob Glanville by Jacob Glanville, Mark Bellin, Sergei Pletnev, ..., Hannah Hirou, Tracy Liu, Peter D. Kwong 101016/JCELL202503050 instant download after payment.

SUMMARY

Snake envenomation is a neglected tropical disease, with 600 species causing over 100,000 deaths and300,000 permanent disabilities in humans annually. Broadly neutralizing antibodies and broad chemical inhibitors have been proposed as solutions, but how to develop a therapeutically effective cocktail and thenumber of required components have been unclear. To address this gap, we iteratively recovered twobroadly neutralizing antivenom antibodies from the memory B cells of a hyperimmune human donor withextensive snake venom exposure. The antibodies recognized conserved neutralizing epitopes on prevalentlong and short snake neurotoxins, with crystal structures revealing antibody mimicry of the interfaces between these neurotoxins and their host target, the nicotinic acetylcholine receptor. We combined and testedthese antibodies and the phospholipase inhibitor varespladib. A 3-component cocktail rescued animals fromwhole-venom challenge of all species in a 19-member WHO Category 1 and Category 2 elapid diversity set,with complete protection against most snakes observed.