title: Monoclonal antibodies against noxiustoxin.
abstract: Noxiustoxin, a 39-amino acid residue peptide isolated from the venom of the Mexican scorpion Centruroides noxius, has previously been shown to affect voltage-dependent K+ channels. Here we describe the isolation and characterization of monoclonal antibodies (MAbs) against this toxin and their use in structure-function relationship studies. Six hybridoma clones (BNTX4, -12, -14, -16, -18, and -21) producing MAbs against noxiustoxin were isolated. The epitopes defined by the MAbs are overlapping or in close proximity because no MAb pair could bind simultaneously to the toxin. All the MAbs inhibited to various degrees the binding of the toxin to its receptor sites on rat brain synaptosomal membranes. The venom from other Centruroides species was shown to contain components cross-reacting with the MAbs, suggesting the existence of other NTX-like toxins.
authors.affiliation: Departamento de Immunología, Universidad Nacional Autónoma de México, Mexico.
authors.forename: P
authors.initials: P
authors.lastname: Hérion
authors.forename: G
authors.initials: G
authors.lastname: Gurrola-Briones
authors.forename: M
authors.initials: M
authors.lastname: Del Rocío Sánchez
authors.forename: R
authors.initials: R
authors.lastname: Saavedra
authors.forename: L D
authors.initials: LD
authors.lastname: Possani
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000096:biosynthesis* / Q000737:chemistry / Q000494:pharmacology; D001666:Binding Sites, Antibody; D001667:Binding, Competitive; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D007074:Immunoglobulin G / Q000145:classification; D051379:Mice; D008807:Mice, Inbred BALB C; D051381:Rats; D011971:Receptors, Immunologic / Q000737:chemistry / Q000187:drug effects; D012604:Scorpion Venoms / Q000276:immunology* / Q000378:metabolism; D013045:Species Specificity; D013574:Synaptosomes / Q000276:immunology
chemical_list: D000911:Antibodies, Monoclonal; D007074:Immunoglobulin G; D011971:Receptors, Immunologic; D012604:Scorpion Venoms; C052567:noxiustoxin