PMID- 3871359 OWN - NLM STAT- MEDLINE DCOM- 19850228 LR - 20190720 IS - 0008-8749 (Print) IS - 0008-8749 (Linking) VI - 90 IP - 1 DP - 1985 Jan TI - Characterization of cell lines enhancing IL-2 production by human phytohemagglutinin-stimulated lymphocytes. PG - 142-53 AB - Certain cell lines were found to significantly enhance IL-2 production by phytohemagglutinin-stimulated T lymphocytes, and the mechanisms involved in mediating such an enhancement have been studied. All B-lymphoblastoid cell lines (B-CL) tested had an enhancing capability, even lines which were immature, surface immunoglobulin negative, or negative for EBV-associated antigens or Fc receptors. Furthermore, a B-CL lacking HLA-A, B, and C, antigens as well as a HLA-DR-deficient mutant line enhanced IL-2 production. Autologous B-CL as well as allogeneic lines were able to augment IL-2 production. Cell lines from patients with T-cell acute lymphoblastic leukemia did not stimulate, while more mature, DR-positive T-cell lines did. Although all HLA-DR positive cell lines, regardless of their derivation, provided enhancement, several lines of evidence, including blocking experiments with anti-DR antibodies, indicated that the reaction was not HLA-DR mediated. The enhancing determinant(s) appeared to be cell associated since CL supernatants were ineffective, and it may serve as an important additional signal to the preactivated IL-2-producer T-cell. FAU - Gramatzki, M AU - Gramatzki M FAU - Bonnard, G D AU - Bonnard GD FAU - Herberman, R B AU - Herberman RB FAU - Strong, D M AU - Strong DM LA - eng GR - Y 01-CP-00319/CP/NCI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - Cell Immunol JT - Cellular immunology JID - 1246405 RN - 0 (HLA-DR Antigens) RN - 0 (Histocompatibility Antigens Class II) RN - 0 (Interleukin-2) RN - 0 (Isoantigens) RN - 0 (Lymphokines) RN - 0 (Phytohemagglutinins) SB - IM MH - B-Lymphocytes/immunology MH - Cell Line MH - HLA-DR Antigens MH - Histocompatibility Antigens Class II/immunology MH - Humans MH - Immune Tolerance MH - Interleukin-2/*biosynthesis MH - Isoantigens/immunology MH - *Lymphocyte Activation/*drug effects MH - Lymphocytes/*metabolism MH - Lymphokines/immunology MH - Phytohemagglutinins/*pharmacology EDAT- 1985/01/01 00:00 MHDA- 1985/01/01 00:01 CRDT- 1985/01/01 00:00 PHST- 1985/01/01 00:00 [pubmed] PHST- 1985/01/01 00:01 [medline] PHST- 1985/01/01 00:00 [entrez] AID - 0008-8749(85)90176-5 [pii] AID - 10.1016/0008-8749(85)90176-5 [doi] PST - ppublish SO - Cell Immunol. 1985 Jan;90(1):142-53. doi: 10.1016/0008-8749(85)90176-5.