IL2- and IL4-dependent proliferation of T-cell clones derived early after allogeneic bone marrow transplantation: studies of patients with chronic myelogenous leukaemia.
In an attempt to explore T-cell functions shortly after allogeneic bone marrow transplantation more fully, IL2- and IL4-dependent proliferation was assessed on CD4+ TCR alpha beta+ T-cell clones derived 4-6 weeks after transplantation. Both allogeneic pooled peripheral blood mononuclear cells and Epstein-Barr virus-transformed B-cell lines (BCL) could function as accessory cells (AC) for PHA activation of T-cell clones. Although minimal clonal proliferation was seen when the T-cell activation signal was BCL+PHA+IL4, a majority of the clones could undergo IL4-dependent proliferation after previous activation with AC+PHA+IL2. For certain clones, IL4 also showed an additive effect with IL2. Thus, IL4 was a growth factor for a majority of the investigated posttransplant T-cell clones, and in vivo modulation of IL4-dependent T-cell functions may thus become a future therapeutic possibility to enhance graft-versus-leukaemia effects in bone marrow transplant recipients.
Second Department of Internal Medicine, University of Tübingen, Federal Republic of Germany.
O
O
Bruserud
W
W
Hamann
S
S
Patel
G
G
Ehninger
G
G
Pawelec
D000938:Antigen-Presenting Cells / Q000502:physiology; D016026:Bone Marrow Transplantation; D015496:CD4-Positive T-Lymphocytes / Q000502:physiology*; D002999:Clone Cells; D004305:Dose-Response Relationship, Drug; D006801:Humans; D007371:Interferon-gamma / Q000096:biosynthesis; D007376:Interleukin-2 / Q000494:pharmacology*; D015847:Interleukin-4 / Q000494:pharmacology*; D015470:Leukemia, Myeloid, Acute / Q000473:pathology* / Q000601:surgery*; D008213:Lymphocyte Activation / Q000187:drug effects*; D010835:Phytohemagglutinins; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000096:biosynthesis; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis / Q000494:pharmacology
D007376:Interleukin-2; D010835:Phytohemagglutinins; D016693:Receptors, Antigen, T-Cell, alpha-beta; D014409:Tumor Necrosis Factor-alpha; D015847:Interleukin-4; D007371:Interferon-gamma