title: Different characteristics of allogeneic and trinitrophenyl-modified H-2-restricted cell-mediated lympholysis: analysis of differences in interleukin-2 dependency using an ontogenical approach.
abstract: Ontogenical development of in vitro allogeneic cell-mediated lympholysis (CML) and in vitro trinitrophenyl (TNP)-modified CML was studied mainly in correlation with helper cell activity, using C3H/HeN and C57BL/6 mice. Allogeneic and TNP-modified CML were not detected in the spleen of these mice at 1 week after birth. Allogeneic CML was detectable, in parallel with increases in age. This activity in 5-week-old mice was much the same as in the 8-week-old mice but the TNP-modified CML did not appear until 8 weeks after birth. Exogenous interleukin-2 (IL-2) induced sufficient activity of TNP-modified CML, even in spleen cells from 1-week-old mice, while the same treatment had a weak but significant effect on the induction of allogeneic CML in these same cells. Experiments on the mixed lymphocyte reaction (MLR) in the presence of exogenous IL-2 showed that lymphocyte proliferation in response to TNP-modified cells was higher than that in response to allogeneic cells. These results suggest different dependencies on IL-2 between allogeneic and TNP-modified killer precursor cells. Endogenous IL-2 production and proliferative response in MLR showed that helper cells contributing to the TNP-modified CML matured later, compared to allogeneic CML. Different sensitivities to IL-2 in two types of CML, in addition to different ontogenical developments, suggest that cytotoxic T lymphocytes to allogeneic cells differ quantitatively and qualitatively from TNP-modified H-2-restricted killer cells.
mesh_terms: D000375:Aging; D000818:Animals; D006183:H-2 Antigens / Q000276:immunology*; D007376:Interleukin-2 / Q000494:pharmacology / Q000502:physiology*; D007519:Isoantigens / Q000276:immunology; D007694:Killer Cells, Natural / Q000502:physiology; D008213:Lymphocyte Activation / Q000187:drug effects; D007959:Lymphocyte Culture Test, Mixed; D008297:Male; D051379:Mice; D008809:Mice, Inbred C3H; D008810:Mice, Inbred C57BL; D009578:Nitrobenzenes / Q000494:pharmacology*; D013154:Spleen / Q000166:cytology; D013602:T-Lymphocytes, Cytotoxic / Q000187:drug effects* / Q000502:physiology; D050378:T-Lymphocytes, Regulatory / Q000187:drug effects / Q000502:physiology; D014301:Trinitrobenzenes / Q000494:pharmacology*
chemical_list: D006183:H-2 Antigens; D007376:Interleukin-2; D007519:Isoantigens; D009578:Nitrobenzenes; D014301:Trinitrobenzenes