Abstract:
:Most studies have shown that interleukin-1 (IL-1) acts as a helper or co-stimulator in T-lymphocyte activation and proliferation by mitogens or antigens. We describe here a stable subclone (D10S) of the murine D10.G4.1 helper T-cell which proliferates to subfemtomolar (attomolar) concentrations of IL-1 beta or alpha in the absence of mitogens. D10S cells have been maintained in culture for over two years without splenic cell feeder layers nor antigen stimulation. Detection of proliferation can be made by either uptake of tritiated thymidine at 72 h or in 48 h by a colorimetric assay which measures mitochondrial dehydrogenases; the latter assay is rapid and inexpensive. D10S cells are distinct from the parent clone D10.G4., which requires mitogens for IL-1 activity. IL-1-induced proliferation is independent of the elaboration of IL-2, IL-4, or IL-6, although these cells proliferate to these lymphokines at considerably higher concentrations when compared to IL-1. The D10S cells proliferate in direct correlation to the duration of IL-1 presence in the culture. We found no evidence that IL-1 induced more IL-1 in these cells. The subclone is highly specific for IL-1: proliferation was not observed to endotoxin, human or murine interferon-gamma (IFN gamma), tumor necrosis factor (TNF), lymphotoxin, or granulocyte-macrophage colony stimulating factor (GM-CSF). There was no suppressive effect of transforming growth factor (TGF beta). Only at high concentrations (100 ng/ml) did IL-6 induce proliferation. We conclude that this stable, feeder layer-free cell line is highly sensitive to IL-1 which acts as a direct stimulant for these cells; they are also useful for bioassays as well as the study of IL-1 receptors as described in the accompanying paper.
journal_name
Cytokinejournal_title
Cytokineauthors
Orencole SF,Dinarello CAdoi
10.1016/1043-4666(89)91044-2subject
Has Abstractpub_date
1989-11-01 00:00:00pages
14-22issue
1eissn
1043-4666issn
1096-0023pii
1043-4666(89)91044-2journal_volume
1pub_type
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