title: The use of polysiloxane/polyvinyl alcohol beads as solid phase in IgG anti-Toxocara canis detection using a recombinant antigen.
abstract: Immunodetection of human IgG anti-Toxocara canis was developed based on ELISA and on the use of polysiloxane/polyvinyl alcohol (POS/PVA) beads. A recombinant antigen was covalently immobilized, via glutaraldehyde, onto this hybrid inorganic-organic composite, which was prepared by the sol-gel technique. Using only 31.2 ng antigen per bead, a peroxidase conjugate dilution of 1:10,000 and a serum dilution of 1:200 were adequate for the establishment of the procedure. This procedure is comparable to that which utilizes the adsorption of the antigen to conventional PVC plates. However, the difference between positive and negative sera mean absorbances was larger for this new glass based assay. In addition to the performance of the POS/PVA bead as a matrix for immunodetection, its easy synthesis and low cost are additional advantages for commercial application.
authors.affiliation: Laboratório de Imunopatologia Keizo Asami, Departamento de Bioquímica, Universidade Federal de Pernambuco, Recife, PE, Brasil. lbcj@hotlink.com.br
authors.forename: Raquel de Andrade Lima
authors.initials: Rde A
authors.lastname: Coêlho
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yamasaki
authors.forename: Emília
authors.initials: E
authors.lastname: Perez
authors.forename: Luiz Bezerra
authors.initials: LB
authors.lastname: de Carvalho
mesh_terms: D000042:Absorption; D000818:Animals; D000909:Antibodies, Helminth / Q000032:analysis*; D000947:Antigens, Helminth / Q000032:analysis; D002648:Child; D004797:Enzyme-Linked Immunosorbent Assay / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis*; D011142:Polyvinyl Alcohol; D012833:Siloxanes; D017166:Toxocara canis / Q000276:immunology*; D014120:Toxocariasis / Q000175:diagnosis
chemical_list: D000909:Antibodies, Helminth; D000947:Antigens, Helminth; D007074:Immunoglobulin G; D012833:Siloxanes; D011142:Polyvinyl Alcohol