title: Gnathostoma binucleatum: excretion-secretion antigen analysis obtained from advanced third-stage larvae in in vitro culture.
abstract: The paper describes an introductory characterization of antigenic stimulation of excretion-secretion products (ESP) of Gnathostoma binucleatum advanced third-stage larvae cultured in vitro and proteinases present in this products. Excretory and secretory proteins were obtained after 10 larvae were maintained in 5% CO(2) RPMI medium. The supernatant was collected each week for two months. The proteins were dialyzed, concentrated, and separated in 10% SDS-PAGE gels under reducing conditions and transferred to nitrocellulose paper for immunoblot analyses. G. binucleatum immunized mice serum was used to determine protein antigenicity. Four proteins of 40, 80, 120, and 208 kDa persisted for two months and three proteins, 80, 120, and 208 kDa were recognized for antibodies of mice. In SDS-PAGE gelatin substrate gels ESP resolved as two proteins with molecular weight of 80 and 208 kDa that were sensitive to a metalloproteinase inhibitor, and thus it may be inferred that they might be used for diagnosis of gnathostomiasis.
authors.affiliation: Laboratorio de Investigación en Parasitología, Hospital Infantil de México "Federico Gómez," Dr. Márquez No. 162, Col. Doctores, Deleg, Cuauhtémoc, Mexico.
authors.forename: María de Lourdes
authors.initials: Mde L
authors.lastname: Caballero-García
authors.forename: Roberto Javier
authors.initials: RJ
authors.lastname: Almeyda-Artigas
authors.forename: Miguel Angel
authors.initials: MA
authors.lastname: Mosqueda-Cabrera
authors.forename: Enedina
authors.initials: E
authors.lastname: Jiménez-Cardoso
mesh_terms: D000818:Animals; D000909:Antibodies, Helminth / Q000276:immunology; D000947:Antigens, Helminth / Q000032:analysis* / Q000737:chemistry / Q000276:immunology; D015153:Blotting, Western; D004285:Dogs; D004591:Electrophoresis, Polyacrylamide Gel; D005260:Female; D006039:Gnathostoma / Q000201:enzymology / Q000276:immunology*; D006801:Humans; D007106:Immune Sera / Q000276:immunology; D007814:Larva / Q000201:enzymology / Q000276:immunology; D051379:Mice; D008970:Molecular Weight; D010447:Peptide Hydrolases / Q000032:analysis* / Q000737:chemistry; D017205:Spirurida Infections / Q000276:immunology / Q000469:parasitology*
chemical_list: D000909:Antibodies, Helminth; D000947:Antigens, Helminth; D007106:Immune Sera; D010447:Peptide Hydrolases