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  • Title: T cells with FC receptors in myeloma; suppression of growth and secretion of MOPC-315 by T alpha cells.
    Author: Müller S, Hoover RG.
    Journal: J Immunol; 1985 Jan; 134(1):644-7. PubMed ID: 3871117.
    Abstract:
    We have previously demonstrated that 1) BALB/c mice and patients with IgA myeloma developed a marked expansion of T cells with surface IgA-Fc receptors (T alpha cells), 2) the FcR alpha were induced by direct interaction of soluble myeloma IgA with T cells, and 3) the T alpha cells induced in IgA myeloma were Lyt-1-2+, IgA isotype-specific suppressor cells in normal immune responses. These findings established that the host with IgA myeloma responds to the large amounts of Ig produced by the tumor by activating an otherwise normal IgA isotype-specific suppressor circuit. In the present studies, we extend our previous observations and show that T alpha cells can suppress both the growth and secretion of MOPC-315 myeloma tumor cells. Thus, the isotype-specific immunoregulatory circuit activated in myeloma is capable of suppressing tumor cells as well as normal cells.
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