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Fc-Mediated Functions of Porcine IgG Subclasses.
Paudyal, Basudev; Mwangi, William; Rijal, Pramila; Schwartz, John C; Noble, Alistair; Shaw, Andrew; Sealy, Joshua E; Bonnet-Di Placido, Marie; Graham, Simon P; Townsend, Alain; Hammond, John A; Tchilian, Elma.
  • Paudyal B; Host Responses, The Pirbright Institute, Woking, United Kingdom.
  • Mwangi W; Host Responses, The Pirbright Institute, Woking, United Kingdom.
  • Rijal P; Medical Research Council (MRC) Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom.
  • Schwartz JC; Host Responses, The Pirbright Institute, Woking, United Kingdom.
  • Noble A; Host Responses, The Pirbright Institute, Woking, United Kingdom.
  • Shaw A; Host Responses, The Pirbright Institute, Woking, United Kingdom.
  • Sealy JE; Host Responses, The Pirbright Institute, Woking, United Kingdom.
  • Bonnet-Di Placido M; Host Responses, The Pirbright Institute, Woking, United Kingdom.
  • Graham SP; Host Responses, The Pirbright Institute, Woking, United Kingdom.
  • Townsend A; Medical Research Council (MRC) Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom.
  • Hammond JA; Host Responses, The Pirbright Institute, Woking, United Kingdom.
  • Tchilian E; Host Responses, The Pirbright Institute, Woking, United Kingdom.
Front Immunol ; 13: 903755, 2022.
Article en En | MEDLINE | ID: mdl-35757698
ABSTRACT
The pig is an important agricultural species and powerful biomedical model. We have established the pig, a large natural host animal for influenza with many physiological similarities to humans, as a robust model for testing the therapeutic potential of monoclonal antibodies. Antibodies provide protection through neutralization and recruitment of innate effector functions through the Fc domain. However very little is known about the Fc-mediated functions of porcine IgG subclasses. We have generated 8 subclasses of two porcine monoclonal anti influenza hemagglutinin antibodies. We characterized their ability to activate complement, trigger cytotoxicity and phagocytosis by immune cells and assayed their binding to monocytes, macrophages, and natural killer cells. We show that IgG1, IgG2a, IgG2b, IgG2c and IgG4 bind well to targeted cell types and mediate complement mediated cellular cytotoxicity (CDCC), antibody dependent cellular cytotoxicity (ADCC) and antibody mediated cell phagocytosis (ADCP). IgG5b and IgG5c exhibited weak binding and variable and poor functional activity. Immune complexes of porcine IgG3 did not show any Fc-mediated functions except for binding to monocytes and macrophages and weak binding to NK cells. Interestingly, functionally similar porcine IgG subclasses clustered together in the genome. These novel findings will enhance the utility of the pig model for investigation of therapeutic antibodies.
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Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Inmunoglobulina G / Citotoxicidad Celular Dependiente de Anticuerpos Tipo de estudio: Prognostic_studies Límite: Animals Idioma: En Año: 2022 Tipo del documento: Article

Texto completo: 1 Banco de datos: MEDLINE Asunto principal: Inmunoglobulina G / Citotoxicidad Celular Dependiente de Anticuerpos Tipo de estudio: Prognostic_studies Límite: Animals Idioma: En Año: 2022 Tipo del documento: Article