Abstract
Alloactivated human lymphocytes were cloned by limiting dilution. After 1 month in culture with T-cell growth factor several clones incorporated tritiated thymidine when stimulated with the appropriate allogeneic cells. Specificity of restimulation of two primed lymphocyte clones, designated 12-2 and 12-8, was studied in detail after varying periods of culture (up to 50 days). Clone 12-2 cells were stimulated only by cells expressing the HLA-Dw antigens of the original priming cells (Dw3); furthermore, this primed lymphocyte reagent specifically recognized antigens associated with only one of the three distinct Dw3-bearing haplotypes from an informative family (KOH). Clone 12-8 cells, on the other hand, failed to recognize Dw3 antigens in the random panel or on homozygous typing cells (including the original priming cell), but were strongly restimulated by certain cells expressing Dw4 antigens. In addition, within family KOH, these restimulating products segregated with another one of the three Dw3-bearing haplotypes but with none of the three Dw4-bearing haplotypes. These two clones exemplify a hitherto unknown precision in cellular typing of theHLA-D region. Clone 12-2 allows the discrimination of a probably rare and as yet undetected HLA-Dw3 subtypic specificity. Clone 12-8, on the other hand, apparently identifies an allelic system segregating withHLA but distinct from the HLA-D determinants definable by HTC-typing.
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Abbreviations
- MHC:
-
major histocompatibility complex
- HLA:
-
human leukocyte antigens
- PBL:
-
peripheral blood leukocytes
- HTC:
-
homozygous typing cells
- MLC:
-
mixed leukocyte culture
- PLT:
-
primed lymphocyte testing
- TCGF:
-
T-cell growth factor
- CTC:
-
cultured T cells
- Tdr:
-
tritiated thymidine
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Pawelec, G., Wernet, P. Restimulation properties of human alloreactive cloned t-cell lines. Dissection ofHLA-D-Region alleles in population studies and in family segregation analysis. Immunogenetics 11, 507–519 (1980). https://doi.org/10.1007/BF01567819
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DOI: https://doi.org/10.1007/BF01567819