Abstract：
:Co-stimulation of highly purified peripheral T lymphocytes from healthy blood donors with the adhesion molecules CD2 and CD28 in association with recombinant interleukin-7 (rIL-7) induced T-cell proliferation, multiple cytokine secretion and IL-2 receptivity. We demonstrated that rIL-7 is as potent as rIL-2 in inducing the proliferation of unseparated, CD4+ and CD8+ T cells. In contrast to low or undetectable levels of IL-1 alpha, IL-6 and IL-2, high levels of tumour necrosis factor-alpha (TNF-alpha), IL-4 and granulocyte-macrophage colony-stimulating factor (GM-CSF) were secreted. Experiments using blocking antibodies suggested a direct mechanism for rIL-7 co-stimulatory effect, although induction of the CD25/IL-2 receptor alpha-chain (CD25/IL-2R alpha) was observed. Monoclonal antibodies (mAb) against the adhesion molecules CD2 and CD28 are likely to mimic the interaction with their respective physiological ligands [lymphocyte function-associated antigen-3 (LFA-3)/CD58, CD59 and CD48 for CD2, B7/BB1 for CD28]. Taken together, these in vitro data suggest that IL-7 could participate in paracrine interactions between T lymphocytes and thymic stromal cells or dendritic cells, via its potent co-stimulatory activity with CD2 and CD28 adhesion molecules.
journal_name
Immunologyjournal_title
Immunologyauthors
Costello R,Brailly H,Mallet F,Mawas C,Olive Dsubject
Has Abstractpub_date
1993-11-01 00:00:00pages
451-7issue
3eissn
0019-2805issn
1365-2567journal_volume
80pub_type
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