Andrew J. MacPherson is Professor of Medicine and Director of Gastroenterology at the University Hospital of Bern, Switzerland. He studied Biochemistry and Medicine at Cambridge University and did his PhD on sugar-proton symport systems in the laboratory of Sir Hans Kornberg and Peter Henderson. His clinical medical studies and clinical speciality training in Gastroenterology were in Cambridge and London. In 1997 he moved to work with Rolf Zinkernagel at the Institute of Experimental Immunology in Zürich. Between 2004 and 2008 he was Farncombe Professor of Medicine and a Canada Research Chair holder at McMaster University in Hamilton.His work has shown that there are different pathways of induction of immunoglobulin (Ig)A in the intestinal mucosa by commensal intestinal microbes, with and without help from T cells. He has investigated compartmentalisation between the mucosal and systemic Ig responses to commensals with mucosal immune responses are driven locally by dendritic cells that have sampled commensals at the epithelial surface. His lab has developed methods of reversible colonisation of germ-free mice to allow intestinal colonisation with commensals and mucosal immune priming to be experimentally uncoupled, to address mucosal immune memory and the functional consequences of mucosal immune responses in host-microbial mutualism.
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