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Chapter category: MHC

Identifying T Cell-Defined Histocompatibility Antigens by Expression Cloning

This chapter appears in the following book:

Minor Histocompatibility Antigens: From the Laboratory to the Clinic

Edited by: Derry C. Roopenian
ISBN: 1-57059-599-2
» Get more information about this book at landesbioscience.com «

Chapter authors:
Lisa M. Mendoza, Pedro Paz, Aamir Zuberi, Gregory Christianson, Derry Roopenian, Nilabh Shastri


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Minor histocompatibility (H) antigens were first defined at the cellular level approxi-mately 50 years ago.1,2 Since then, over 50 distinct H loci have been identified based upon their inheritance and segregation patterns in recombinant and congenic mouse strains. Polymorphisms in the H antigens account for the immunological responses that lead to graft rejection and graft versus host disease (GVHD) when tissue is transplanted between MHC identical individuals.3 The gene products of H loci serve as precursors of processed peptides which are presented by MHC molecules to T cells.4 The graft rejection phenotype resulting from differences between H loci, therefore, is the result of T–cell responses elicited by either qualitative or quantitative differences in the antigenic peptides displayed by the MHC molecules on the donor versus the host cell surface. Identification of H antigens at the molecular level is thus critical for defining the basis of these genetic polymorphisms and is important for understanding the mechanisms by which graft rejection occurs.

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