title: The target minor H antigen for F1 cytotoxic T lymphocytes induced by Igh-congenic parental spleen cells is coded for by gene linked to H-2.
abstract: Graft-vs-host reaction (GvHR) induced in (B10.BR X CWB)F1 (BWF1; H-2k/b, Ighb/b) by i.v. injection with CWB (H-2b, Ighb) spleen cells resulted in complete suppression of cytotoxic T lymphocyte (CTL) responsiveness of the F1 host spleen cells (GvHR-associated immunosuppression). In contrast, GvHR induced in BWF1 mice with CSW (H-2b, Ighj; Igh-congenic to CWB) spleen cells did not affect CTL responsiveness of the F1 host spleen cells at all. The BWF1 hosts undergoing the CSW-induced GvHR generated anti-CSW CTL in their spleens, and the subsequent culture of such BWF1 spleen cells with CSW stimulator cells, augmented the CTL activity. The BWF1 anti-CSW CTL lysed both Con A- and LPS-induced splenic blasts from mouse strains carrying the Ighj allele in the context of self H-2Kb. However, determination of the Igh haplotype in the serum IgG and of the susceptibility of the splenic lymphocytes to the BWF1 anti-CSW CTL on backcross mice, which carry either Ighb/j or Ighb/b in the context of H-2b/b or H-2b/k, showed clearly that Ighj and the gene coding for the target antigen for the BWF1 anti-CSW CTL segregated at ratios close to 1:1. The study in which linkage between the gene(s) coding for the target antigen for the BWF1 anti-CSW CTL and H-2 was examined on CWB X (C3H X CWB)F1 backcross mice and (B10.BR X CSW)F1 X B10 mice demonstrated that the gene, most likely a single gene, coding for the target antigen for the BWF1 anti-CSW CTL is located at 8.5 +/- 4.3 cross-over units to the right or left of the H-2 complex. We designated the minor H antigen to be recognized by the BWF1 anti-CSW CTL as H-X+, and we discuss the distinction between the H-X+ locus and the other minor H loci on chromosome 17.
authors.forename: H
authors.initials: H
authors.lastname: Ishikawa
authors.forename: E
authors.initials: E
authors.lastname: Kubota
authors.forename: H
authors.initials: H
authors.lastname: Suzuki
authors.forename: K
authors.initials: K
authors.lastname: Saito
mesh_terms: D000818:Animals; D003433:Crosses, Genetic; D003602:Cytotoxicity, Immunologic; D000939:Epitopes; D005815:Genetic Code; D008040:Genetic Linkage; D006087:Graft vs Host Reaction; D006183:H-2 Antigens / Q000235:genetics*; D007113:Immunity, Innate; D007143:Immunoglobulin Heavy Chains / Q000235:genetics*; D007519:Isoantigens / Q000235:genetics*; D008213:Lymphocyte Activation; D051379:Mice; D008806:Mice, Inbred AKR; D008809:Mice, Inbred C3H; D008808:Mice, Inbred CBA; D008811:Mice, Inbred DBA; D008912:Minor Histocompatibility Loci; D013154:Spleen / Q000166:cytology*; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*
chemical_list: D000939:Epitopes; D006183:H-2 Antigens; D007143:Immunoglobulin Heavy Chains; D007519:Isoantigens