Thymic selection of H-2-incompatible bone marrow cells in SCID mice. Differences in T help for induction of B cell IgG responses versus cytotoxic T cells.
Mice with congenital severe combined immunodeficiency disease (SCID) failed to mount either a T cell-independent IgM or T cell-dependent IgG anti-vesicular stomatitis virus (VSV) Indiana (IND) response. They did not generate cytotoxic T cells against lymphocytic choriomeningitis virus (LCMV) or vaccinia virus, but exhibited NK cell-like activities. When SCID mice were given bone marrow from syngeneic BALB/c (H-2d) nu/nu mice, all immune responses were expressed at control levels. If SCID mice were reconstituted with allogeneic H-2b C57BL/6 nu/nu bone marrow, the following primary anti-viral immune responses were measured. T-independent IgM anti-VSV-IND were normal, but T-dependent IgG anti-VSV-IND responses were absent. Cytotoxic T cell responses to LCMV and vaccinia virus were within normal ranges, were donor cell mediated, and were specific exclusively for the recipient SCID H-2d type. Since antigen presentation by spleen cells was functional in these chimaeras, the presented results indicate that (a) thymic selection of T cell restriction is strict; and (b) the type of T help necessary for B cells depends upon H-2-restricted contact between T and B cells, whereas, such contact-dependent help is not mandatory for the induction of virus-specific cytotoxic T cells.
Zinkernagel
R M
RM
Institut of Pathology, University Hospital, Zürich, Switzerland.
Rüedi
E
E
Althage
A
A
Hengartner
H
H
Reimann
G
G
D000818:Animals; D000914:Antibodies, Viral / Q000096:biosynthesis; D001402:B-Lymphocytes / Q000276:immunology; D001853:Bone Marrow / Q000276:immunology*; D001854:Bone Marrow Cells; D003602:Cytotoxicity, Immunologic; D006183:H-2 Antigens / Q000276:immunology*; D007111:Immunity, Cellular; D007153:Immunologic Deficiency Syndromes / Q000276:immunology*; D051379:Mice; D008817:Mice, Mutant Strains; D008819:Mice, Nude; D009500:Neutralization Tests; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology*; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology*; D013950:Thymus Gland / Q000276:immunology*; D014616:Vaccinia virus / Q000276:immunology*
D000914:Antibodies, Viral; D006183:H-2 Antigens