title: Antibody response to a protease secreted by Trichinella spiralis muscle larvae.
abstract: In the present study we analyzed the humoral response of Trichinella spiralis-infected mice to a 35-kDa protease (purified from the excretory-secretory products of T. spiralis muscle larvae) by a Western-blot procedure and an enzyme-linked immunosorbent assay (ELISA) technique using a panel of postinfection mouse anti-Trichinella sera. The results demonstrated that this response was time-dependent and that infected mice could be distinguished from controls. In addition, inhibition assays demonstrated that these antisera were capable of abolishing the proteinase activity of the 35-kDa protease in vitro. The occurrence of proteases seems to be a very common feature in parasite crude extracts and excretory-secretory products (McKerrow 1989). It is also known that these enzymes are implicated in important host-parasite interactions, and for this reason, recent reports have proposed the use of parasite proteases both as alternative targets for an induced immune response and as a rich source of antigenic material for diagnostic testing (Hotez et al. 1985; Yamasaki et al. 1989; Song et al. 1990; Frank and Grieve 1991; Britton et al. 1992; Song and Chappell 1993). We have recently purified a protease (mol. wt., 35 kDa) from the excretory-secretory (ES) products of Trichinella spiralis (GM-1 strain) muscle larvae and established some of the biochemical properties of this protease (Armas-Serra et al. 1994).(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Laboratory of Parasitology, Faculty of Pharmacy, University of Alcalá de Henares, Spain.
authors.forename: C
authors.initials: C
authors.lastname: de Armas-Serra
authors.forename: C
authors.initials: C
authors.lastname: Gimenez-Pardo
authors.forename: W E
authors.initials: WE
authors.lastname: Bernadina
authors.forename: F
authors.initials: F
authors.lastname: Rodriguez-Caabeiro
mesh_terms: D000818:Animals; D000909:Antibodies, Helminth / Q000097:blood* / Q000494:pharmacology; D000947:Antigens, Helminth / Q000276:immunology*; D010450:Endopeptidases / Q000187:drug effects / Q000276:immunology* / Q000378:metabolism; D015151:Immunoblotting; D007814:Larva / Q000201:enzymology / Q000276:immunology; D051379:Mice; D009132:Muscles / Q000469:parasitology*; D017160:Trichinella spiralis / Q000201:enzymology / Q000276:immunology*
chemical_list: D000909:Antibodies, Helminth; D000947:Antigens, Helminth; D010450:Endopeptidases