title: In-depth proteomic and glycomic analysis of the adult-stage Cooperia oncophora excretome/secretome.
abstract: Cooperia oncophora is one of the most common intestinal parasitic nematodes in cattle worldwide. To date, C. oncophora infections are treated using broad-spectrum anthelmintics. However, during the past decade, reports of anthelmintic resistance in this parasite species have emerged worldwide, necessitating new avenues for its control, possibly through vaccination. In this frame, we analyzed the adult-stage C. oncophora excretome/secretome (ES), covering both the protein and glycan components, since this fraction constitutes the primary interface between parasite and host and may hold potential vaccine candidates. Two-dimensional gel electrophoretic separation of the ES material enabled the MALDI-TOF mass spectrometry (MS)-directed identification of 12 distinct proteins, grouped in three separate molecular weight fractions: (i) a high molecular weight fraction consisting of a double-domain activation-associated secreted protein (ASP), (ii) a midmolecular weight fraction predominantly containing a single-domain ASP, a thioredoxin peroxidase and innexin, and (iii) a low molecular weight protein pool essentially holding two distinct low molecular weight antigens. Further MS-driven glycan analysis mapped a variety of N-glycans to the midmolecular weight single-domain ASP, with Man6GlcNAc2 oligomannosyl glycans as the major species. The predominance of the nonglycosylated double-domain ASP in the high-molecular weight fraction renders it ideal for advancement toward vaccine trials and development.
authors.affiliation: Laboratory of Parasitology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, Merelbeke B-9820, Belgium. jimmyborloo@hotmail.com
authors.forename: Jimmy
authors.initials: J
authors.lastname: Borloo
authors.forename: Jessie
authors.initials: J
authors.lastname: De Graef
authors.forename: Iris
authors.initials: I
authors.lastname: Peelaers
authors.forename: D Linh
authors.initials: DL
authors.lastname: Nguyen
authors.forename: Makedonka
authors.initials: M
authors.lastname: Mitreva
authors.forename: Bart
authors.initials: B
authors.lastname: Devreese
authors.forename: Cornelis H
authors.initials: CH
authors.lastname: Hokke
authors.forename: Jozef
authors.initials: J
authors.lastname: Vercruysse
authors.forename: Edwin
authors.initials: E
authors.lastname: Claerebout
authors.forename: Peter
authors.initials: P
authors.lastname: Geldhof
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D005260:Female; D006023:Glycoproteins / Q000737:chemistry / Q000378:metabolism*; D015801:Helminth Proteins / Q000737:chemistry / Q000378:metabolism*; D008018:Life Cycle Stages; D008297:Male; D008969:Molecular Sequence Data; D011134:Polysaccharides / Q000737:chemistry / Q000378:metabolism; D020543:Proteome / Q000737:chemistry / Q000378:metabolism*; D040901:Proteomics; D014251:Trichostrongyloidea / Q000378:metabolism*
chemical_list: D006023:Glycoproteins; D015801:Helminth Proteins; D011134:Polysaccharides; D020543:Proteome
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