Brown snake venom neurotoxins

Brown snake venom neurotoxins are a group of highly potent proteins found in the venom of the genus Pseudonaja, which includes the Eastern Brown Snake (Pseudonaja textilis), one of the world's most venomous land snakes [1]. These toxins are primarily categorized into presynaptic and postsynaptic neurotoxins. The most significant component is textilotoxin, a complex presynaptic phospholipase A2 that prevents the release of acetylcholine from motor nerve terminals, leading to profound neuromuscular blockade [2]. Postsynaptic neurotoxins, such as pseudonajatoxin, act by binding to nicotinic acetylcholine receptors at the neuromuscular junction, further inhibiting muscle contraction [3]. Clinically, envenomation by these toxins results in progressive paralysis and potentially fatal respiratory failure [4]. Therapeutic intervention relies on the administration of specific antivenoms, which contain antibodies that neutralize these toxins before they can bind to their physiological targets [5].

Other names

Pseudonaja neurotoxinsTextilotoxinPseudonajatoxinBrown snake presynaptic neurotoxinsBrown snake postsynaptic neurotoxins

Antivenoms contain specific polyclonal antibodies that bind to and neutralize the venom neurotoxins, preventing their interaction with presynaptic nerve terminals or postsynaptic nicotinic acetylcholine receptors [5].