title: Induction of a protective immune response to murine coronavirus with non-internal image anti-idiotypic antibodies.
abstract: Neurotropic murine coronaviruses (MHV) provide an excellent animal model to study experimental modulation of the immune response to a viral pathogen with anti-idiotypic antibodies. It is known that among the various types of anti-idiotypic antibodies (anti-Id), those designated beta (beta) or internal image can molecularly mimic the antigen and induce biological activities such as anti-viral protection and neutralization. We have recently shown that polyclonal non-internal image anti-idiotypic antibodies of the gamma-type could induce protective anti-coronavirus immunity. In the present study, a polyclonal anti-Id (Ab2) was induced against a neutralizing murine monoclonal antibody (MAb1), designated 5B170.11. Mice immunized with this affinity-purified rabbit Ab2 alpha, a non-internal image antibody, were partially protected against lethal infection by the JHM strain of MHV. However, other polyclonal and monoclonal non-internal image Ab2 induced against another neutralizing Mab1, designated 4-11G.6, were not able to protect mice against lethal infection with the A59 strain of MHV. These results demonstrate that anti-viral protection by altering the idiotypic network with non-internal image-bearing anti-idiotype reagents can be achieved even with some anti-Id of the alpha-type.
authors.affiliation: Laboratory of Neuroimmunovirology, Institut Armand-Frappier, Université Du Québec, Laval, Canada.
authors.forename: M
authors.initials: M
authors.lastname: Yu
authors.forename: P J
authors.initials: PJ
authors.lastname: Talbot
mesh_terms: D000818:Animals; D000906:Antibodies; D000888:Antibodies, Anti-Idiotypic / Q000096:biosynthesis*; D000911:Antibodies, Monoclonal; D000917:Antibody Formation; D018352:Coronavirus Infections / Q000276:immunology* / Q000473:pathology; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D008562:Membrane Glycoproteins / Q000032:analysis / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D006517:Murine hepatitis virus / Q000276:immunology* / Q000302:isolation & purification / Q000502:physiology; D009500:Neutralization Tests; D011817:Rabbits / Q000276:immunology; D064370:Spike Glycoprotein, Coronavirus; D014759:Viral Envelope Proteins / Q000032:analysis / Q000276:immunology; D010948:Viral Plaque Assay; D014779:Virus Replication
chemical_list: D000906:Antibodies; D000888:Antibodies, Anti-Idiotypic; D000911:Antibodies, Monoclonal; D008562:Membrane Glycoproteins; D064370:Spike Glycoprotein, Coronavirus; D014759:Viral Envelope Proteins