Venom toxins from Common Krait (Bungarus caeruleus)

Venom toxins from the Common Krait (Bungarus caeruleus) are a potent mixture of proteins and peptides that primarily induce severe neurotoxicity in humans [1, 11]. The venom is dominated by beta-bungarotoxins, which are presynaptic neurotoxins possessing phospholipase A2 activity that irreversibly damage motor nerve terminals and deplete synaptic vesicles [1, 16]. This action leads to a failure of acetylcholine release, resulting in flaccid paralysis [1, 15]. Additionally, the venom contains postsynaptic alpha-neurotoxins, such as alpha-bungarotoxin and kappa-bungarotoxin, which competitively block nicotinic acetylcholine receptors at the neuromuscular junction [1, 5, 8]. Envenomation typically presents as a progressive descending paralysis that can rapidly lead to respiratory arrest, often without significant local pain or swelling [16, 17]. While polyvalent antivenom is the primary therapeutic intervention, it is often unable to reverse established paralysis due to the irreversible nature of presynaptic damage [15, 16, 17]. Consequently, management frequently requires prolonged mechanical ventilation in severe cases [15, 16]. Beyond their pathological role, these toxins are essential tools in pharmacological research for studying ion channels and receptors [8, 14]. Some components are also being investigated for potential therapeutic applications in areas such as analgesia and oncology [10].

Other names

Common Krait venomBungarus caeruleus venom toxinsKrait neurotoxins

Neutralization of venom toxins by specific antibodies to prevent their binding to physiological receptors and enzymes.