Abstract
Murine NK cells can reject allogenic or parental-strain bone marrow cells (BMC) in vivo and can lyse T lymphobasts in vitro. The ‗missing self‘ hypothesis states that absence or presence of ‗negative signals‘ from target cell class I antigens (Ag) to NK receptors determines whether or not lysis occurs. Indeed, lysis of parental-strain basts by purified F1 NK cell subsets occurred only in the presence of anti-receptor antibodies. Evidence for ‗positive signaling‘ to NK cells by class I Ag indudes rejection of D8 (Dd) transgene to B6) BMC by B6 hosts. The outcome of other BMC transplants ccntradict the missing self idea, because donors with identical class I Ag differ in compatibility with certain hosts. Perhaps class I Ag-NK cell receptor interactions dominate over other target-NK cell interactions. These interactions are usually ‗negative‘ but can be ‗positive‘.
Original language | English (US) |
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Pages (from-to) | 121-127 |
Number of pages | 7 |
Journal | Seminars in Immunology |
Volume | 7 |
Issue number | 2 |
DOIs | |
State | Published - 1995 |
Keywords
- Class I molecules
- Lysis of lymphoblasts
- Marrow grafts
- NK receptors
ASJC Scopus subject areas
- Immunology and Allergy
- Immunology