Snake and scorpion venom toxins

Snake and scorpion venom toxins represent a complex mixture of bioactive molecules, primarily proteins and peptides, designed to disrupt the physiological processes of prey or predators (UniProt, 2024). These toxins are categorized into several major families based on their structure and function, such as phospholipase A2 (PLA2), three-finger toxins (3FTx), snake venom metalloproteinases (SVMP), and various ion channel-modulating peptides in scorpions (PubMed, PMID: 30114410). Their biological roles involve the induction of neurotoxicity, hemotoxicity, and cytotoxicity, leading to symptoms ranging from paralysis and respiratory failure to systemic hemorrhage and local tissue necrosis (WHO, 2023). In clinical medicine, these toxins are the direct targets of antivenoms—immunoglobulins or fragments thereof that neutralize toxic activity (FDA, 2021). Furthermore, research into small-molecule inhibitors, such as varespladib for PLA2, aims to provide more stable and accessible treatments for envenomation (PubMed, PMID: 27573643). Beyond their role as targets, these toxins have historically served as invaluable templates for the design of cardiovascular and hematological drugs (StatPearls, 2023).

Other names

Venom proteinsZootoxinsOphitoxinsScorpiotoxinsVenom components

Antivenoms function by binding to and neutralizing the circulating toxins, preventing their interaction with physiological targets. Small molecule inhibitors like varespladib competitively inhibit the active sites of specific venom enzymes such as phospholipase A2.