A B cell lymphoma line, BALL-1 stimulates T cells to produce a unique eosinophil chemotactic factor.
Human mononuclear leukocytes (MNL), probably OKT4-positive T cells, produced an eosinophil chemotactic factor (ECF) when they were cocultured with irradiated BALL-1, a B cell lymphoma line. Treatment of MNL, with anti-IL-2 antibody failed to suppress BALL-1-induced ECF production. Periodate-lysine-paraformaldehyde-fixed but not acetone- and ethanol-fixed BCLL induced evident ECF production. These results suggested that some cell surface molecules play a role in the induction of ECF production. Isoelectric point of BALL-1-induced ECF was around pH7, whereas that of IL-2-induced ECF was around pH 5. The molecular weight of BALL-1-induced ECF was between 10 and 30 kD. Although a combination of MoAb against IL-3, IL-5, and GM, CSF suppressed the activity of IL-2-induced ECF, it failed to suppress that of BALL-1-induced ECF. Furthermore, BALL-1-induced ECF suppressed fMLP-induced respiratory bursts of eosinophils, while IL-2-induced ECF failed. We propose that at least one reason for eosinophil infiltrate into the stroma of tumors is that the tumor cells stimulate T cells to produce BALL-1-induced ECF, and the eosinophils attracted by the ECF exhibit different functions from those by other ECF.
Yoshida
N
N
Department of Pathology, Kumamoto University Medical School, Japan.
Ueno
M
M
Saita
N
N
Hirashima
M
M
D002631:Chemotactic Factors, Eosinophil / Q000096:biosynthesis* / Q000737:chemistry; D006801:Humans; D007963:Leukocytes, Mononuclear / Q000166:cytology / Q000378:metabolism; D008212:Lymphocyte Depletion; D016393:Lymphoma, B-Cell / Q000503:physiopathology; D013601:T-Lymphocytes / Q000378:metabolism*; D014407:Tumor Cells, Cultured
D002631:Chemotactic Factors, Eosinophil