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  • Title: Coordinate production by a T cell hybridoma of gamma interferon and three other lymphokine activities: multiple activities of a single lymphokine?
    Author: Zlotnik A, Roberts WK, Vasil A, Blumenthal E, Larosa F, Leibson HJ, Endres RO, Graham SD, White J, Hill J, Henson P, Klein JR, Bevan MJ, Marrack P, Kappler JW.
    Journal: J Immunol; 1983 Aug; 131(2):794-800. PubMed ID: 6223094.
    Abstract:
    The T cell hybridoma FS7-20, produced by the fusion of normal B10.BR T cells to the AKR thymoma BW5147, was found when stimulated with concanavalin A (Con A) to produce the lymphokines: interleukin 2 (IL 2), interferon-gamma (IFN gamma), macrophage-activating factor (MAF), Ia induction factor IaIF), and the B cell helper factor interleukin X (IL X). The clones and subclones of FS7-20 varied dramatically in their ability to produce these lymphokines, presumably because of karyotypic variations. The ability to produce IL 2 segregated independently from the ability to produce the four other lymphokine activities; however, production of the latter activities showed a strong correlation. This coordinate production of IFN gamma, MAF, IaIF, and IL X was also observed with a cloned normal cytotoxic T cell line, cr15. These results suggest either that IFN gamma, MAF, IaIF, and IL X are all manifestations of a single molecular species or that, although these activities are different structurally, their production is controlled by a common genetic mechanism. In support of the first possibility, the IFN gamma, MAF, IaIF, and IL X activity produced by FS7-20 were all found to be equally sensitive to inactivation at pH 2. These results illustrate the usefulness of using T cell hybridomas for the study of lymphokines.
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