Biomaterial Database

Alloreactive cytotoxic T cells recognize minor transplantation antigens presented by major histocompatibility complex class Ib molecules. 1998

D E Speiser, and M F Bachmann, and M J Soloski, and J Forman, and P S Ohashi

Ludwig Institute for Cancer Research, University of Lausanne, Switzerland.

BACKGROUND Cytotoxic T lymphocytes (CTLs) contribute to the rejection of transplanted tissues through two pathways: first, by direct recognition of foreign graft major histocompatibility complex (MHC) class I molecules; and second, by recognition of foreign graft-derived peptides presented by classical MHC class Ia molecules that are matched between graft and donor. However, a number of observations suggest that additional categories of CTL recognition patterns may exist, but they remain to be defined molecularly. METHODS Previous studies showed that the murine nonclassical MHC molecule H2 M3 may be involved in allorecognition. We investigated whether other members of nonclassical MHC class Ib, namely Qa1 and Qa2, may be recognized. Alloreactive CTLs were generated from mice mismatched for non-MHC and/or MHC genetic backgrounds and tested using various target cells, including cells transfected with Qa1 or Qa2. Furthermore, candidate peptides were synthesized and used to generate CTLs specific for peptide presented by Qa1 or Qa2. RESULTS The experiments demonstrate that allogeneic and xenogeneic peptides were recognized by CTLs when presented on shared nonclassical MHC class Ib Qa1 and Qa2 molecules. CONCLUSIONS The results confirm that MHC class Ib molecules present peptides to CTLs. This potentially important alloreactivity pathway may be functional between most individuals because sharing of MHC class Ib alleles is frequent.

UI	MeSH Term	Description	Entries
D008807	Mice, Inbred BALB C	An inbred strain of mouse that is widely used in IMMUNOLOGY studies and cancer research.	BALB C Mice, Inbred,BALB C Mouse, Inbred,Inbred BALB C Mice,Inbred BALB C Mouse,Mice, BALB C,Mouse, BALB C,Mouse, Inbred BALB C,BALB C Mice,BALB C Mouse
D008810	Mice, Inbred C57BL	One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases.	Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D013602	T-Lymphocytes, Cytotoxic	Immunized T-lymphocytes which can directly destroy appropriate target cells. These cytotoxic lymphocytes may be generated in vitro in mixed lymphocyte cultures (MLC), in vivo during a graft-versus-host (GVH) reaction, or after immunization with an allograft, tumor cell or virally transformed or chemically modified target cell. The lytic phenomenon is sometimes referred to as cell-mediated lympholysis (CML). These CD8-positive cells are distinct from NATURAL KILLER CELLS and NATURAL KILLER T-CELLS. There are two effector phenotypes: TC1 and TC2.	Cell-Mediated Lympholytic Cells,Cytotoxic T Cells,Cytotoxic T Lymphocyte,Cytotoxic T-Lymphocytes,TC1 Cell,TC1 Cells,TC2 Cell,TC2 Cells,Cell Mediated Lympholytic Cells,Cell, Cell-Mediated Lympholytic,Cell, TC1,Cell, TC2,Cell-Mediated Lympholytic Cell,Cytotoxic T Cell,Cytotoxic T Lymphocytes,Cytotoxic T-Lymphocyte,Lymphocyte, Cytotoxic T,Lympholytic Cell, Cell-Mediated,Lympholytic Cells, Cell-Mediated,T Cell, Cytotoxic,T Lymphocyte, Cytotoxic,T Lymphocytes, Cytotoxic,T-Lymphocyte, Cytotoxic
D015395	Histocompatibility Antigens Class I	Membrane glycoproteins consisting of an alpha subunit and a BETA 2-MICROGLOBULIN beta subunit. In humans, highly polymorphic genes on CHROMOSOME 6 encode the alpha subunits of class I antigens and play an important role in determining the serological specificity of the surface antigen. Class I antigens are found on most nucleated cells and are generally detected by their reactivity with alloantisera. These antigens are recognized during GRAFT REJECTION and restrict cell-mediated lysis of virus-infected cells.	Class I Antigen,Class I Antigens,Class I Histocompatibility Antigen,Class I MHC Protein,Class I Major Histocompatibility Antigen,MHC Class I Molecule,MHC-I Peptide,Class I Histocompatibility Antigens,Class I Human Antigens,Class I MHC Proteins,Class I Major Histocompatibility Antigens,Class I Major Histocompatibility Molecules,Human Class I Antigens,MHC Class I Molecules,MHC-I Molecules,MHC-I Peptides,Antigen, Class I,Antigens, Class I,I Antigen, Class,MHC I Molecules,MHC I Peptide,MHC I Peptides,Molecules, MHC-I,Peptide, MHC-I,Peptides, MHC-I
D015778	Minor Histocompatibility Antigens	Allelic alloantigens often responsible for weak graft rejection in cases when (major) histocompatibility has been established by standard tests. In the mouse they are coded by more than 500 genes at up to 30 minor histocompatibility loci. The most well-known minor histocompatibility antigen in mammals is the H-Y antigen.	Histocompatibility Antigens, Minor,Minor Histocompatibility Antigen,Minor Histocompatibility Peptide,Minor Histocompatibility Peptides,Antigen, Minor Histocompatibility,Histocompatibility Antigen, Minor,Histocompatibility Peptide, Minor,Histocompatibility Peptides, Minor,Peptide, Minor Histocompatibility
D051379	Mice	The common name for the genus Mus.	Mice, House,Mus,Mus musculus,Mice, Laboratory,Mouse,Mouse, House,Mouse, Laboratory,Mouse, Swiss,Mus domesticus,Mus musculus domesticus,Swiss Mice,House Mice,House Mouse,Laboratory Mice,Laboratory Mouse,Mice, Swiss,Swiss Mouse,domesticus, Mus musculus