title: Staphylococcus aureus Efb protein expression in Nicotiana tabacum and immune response to oral administration.
abstract: Staphylococcus aureus (S. aureus) is one of the most widespread agent of diseases in humans and animals. In dairy cows, S. aureus is the most frequently isolated contagious pathogens in mastitis cases and vaccines are one of the potential tools to control the infections, thus decreasing the use of antibiotics. Among all the virulence factors produced by S. aureus, extra cellular fibrinogen binding protein (Efb) is an important one in the pathogenesis of mastitis. Plants are useful bioreactors to produce antigens and the aim of the study was the production of Efb in two cultivars of Nicotiana tabacum as a mean to produce vaccine against S. aureus in plants. A matrix attachment region (MAR) sequence was inserted near the two borders of transfer-DNA in the transformation vector in the two possible orientations. The presence of MAR elements in the transformation system significantly improved transformation efficiency and Efb protein yield up to a 2% level on total soluble protein (TSP). Mice orally immunized with transgenic lyophilized leaves produced an antigen-specific immune response.
authors.affiliation: Institute of Biophysics CNR-Dept. Life Sciences, Università degli Studi di Milano, Via Celoria 26, 20133 Milano, Italy.
authors.forename: Margherita
authors.initials: M
authors.lastname: Festa
authors.forename: Paola
authors.initials: P
authors.lastname: Brun
authors.forename: Renata
authors.initials: R
authors.lastname: Piccinini
authors.forename: Ignazio
authors.initials: I
authors.lastname: Castagliuolo
authors.forename: Barbara
authors.initials: B
authors.lastname: Basso
authors.forename: Alfonso
authors.initials: A
authors.lastname: Zecconi
mesh_terms: D000284:Administration, Oral; D000818:Animals; D001426:Bacterial Proteins / Q000032:analysis / Q000235:genetics* / Q000378:metabolism / Q000494:pharmacology; D004797:Enzyme-Linked Immunosorbent Assay; D056724:Immunity, Humoral / Q000276:immunology; D008297:Male; D045170:Matrix Attachment Regions / Q000235:genetics; D051379:Mice; D008807:Mice, Inbred BALB C; D018515:Plant Leaves / Q000737:chemistry; D030821:Plants, Genetically Modified / Q000235:genetics / Q000378:metabolism; D013203:Staphylococcal Infections / Q000276:immunology* / Q000517:prevention & control; D013209:Staphylococcal Vaccines / Q000008:administration & dosage / Q000494:pharmacology*; D014026:Nicotiana / Q000235:genetics* / Q000378:metabolism
chemical_list: D001426:Bacterial Proteins; C114014:Efb protein, Staphylococcus aureus; D013209:Staphylococcal Vaccines