Natural resistance of lethally irradiated F1 hybrid mice to parental marrow grafts is a function of H-2/Hh-restricted effectors

Journal Article · Sun Apr 01 00:00:00 EST 1984 · J. Exp. Med.; (United States)

DOI:https://doi.org/10.1084/jem.159.4.1132· OSTI ID:6904635

Daley, J P; Nakamura, I

The natural resistance of F1 hybrid mice against parental bone marrow grafts is thought to be mediated by natural killer (NK)-like effector cells. However, unlike the NK cell activity against a wide range of tumors and normal cells, hybrid resistance is characterized by the immunogenetic specificity controlled by a set of unique noncodominant genes denoted as Hh. Two alternative hypotheses can account for the specificity. Thus, the specificity may reflect either the Hh restriction of effectors or the Hh gene control of mechanisms regulating non-Hh-restricted effector activity. In this study, therefore, we tested the recognition specificity of putative effectors mediating hybrid resistance in lethally irradiated H-2b/d and H-2b/k F1 hybrid mice to the engraftment of parental H-2b bone marrow. As a direct means of defining the effector specificity, rejection of parental bone marrow grafts was subjected to competitive inhibition in situ by irradiated tumor cells. Of the 16 independent lines of lymphoma and other hemopoietic tumor cells tested, the ability to inhibit hybrid resistance was the exclusive property of all tumors derived from mice homozygous for the H-2Db region, regardless of whether the tumor cells were susceptible or resistant to NK cell-mediated cytotoxicity in vitro. Four cell lines heterozygous for the H-2Db were noninhibitory, including one that is susceptible to natural killing. Pretreatment of the F1 hosts with an interferon inducer augmented the resistance with no alteration in the recognition specificity of effector cells. Therefore, natural resistance to parental H-2b bone marrow grafts was mediated by effectors restricted by the H-2Db/Hh-1b gene(s), and not by the nonrestricted NK cells detectable in conventional in vitro assays.

• Research Organization: Department of Pathology, School of Medicine, State University of New York, Buffalo
• OSTI ID: 6904635
• Journal Information: J. Exp. Med.; (United States), Vol. 159:4
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BONE MARROW
TRANSPLANTS
GRAFT-HOST REACTION
BIOLOGICAL PATHWAYS
IMMUNE REACTIONS
LETHAL IRRADIATION
MICE
RADIATION CHIMERAS
SPECIFICITY
ANIMAL TISSUES
ANIMALS
BODY
CHIMERAS
HEMATOPOIETIC SYSTEM
IRRADIATION
MAMMALS
MOSAICISM
ORGANS
RODENTS
TISSUES
VERTEBRATES
560152* - Radiation Effects on Animals- Animals