title: Lymphoblastoid B cell lines produce an interleukin-1-like activity that can be serologically distinct from macrophage interleukin-1.
abstract: Antigen presentation by macrophages is accompanied by the production of interleukin-1 (IL-1) for successful T cell triggering. We have described EBV infected B cell lines that served as antigen presenting cells (APC) and now report the ability of these cells and their supernates, as well as EBV negative B cell lines, to support IL-2 production by a T cell line JM in the presence of the monoclonal antibody that recognizes the CD3 complex. Both EBV-transformed B cell lines and EBV-negative lines, and their supernates, exhibited IL-1-like activity in two different IL-1 dependent assays. These IL-1-like molecules were released constitutively from five of six EBV positive lines and three of five non-infected B cell lines. The activity from both, one virally infected and one non-infected B cell line, eluted from Sephadex G-75 in two peaks at 15-18K and 30-35K and could not be neutralized by antibody specific for macrophage IL-1. Supernates having IL-1-like molecules also contained a higher molecular weight inhibitor of proliferation. These data indicate that: both EBV-positive and EBV-negative B cell lines are capable of elaborating the IL-1-like activity; and the IL-1-like activity from these cells can be serologically distinct from macrophage IL-1. This suggests the presence of a family of molecules with IL-1 activity that derive from different cell types.
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000276:immunology; D000938:Antigen-Presenting Cells / Q000378:metabolism; D001402:B-Lymphocytes / Q000378:metabolism*; D002460:Cell Line; D002472:Cell Transformation, Viral; D002850:Chromatography, Gel; D003470:Culture Media / Q000032:analysis; D004854:Herpesvirus 4, Human; D007370:Interferon Type I / Q000032:analysis / Q000096:biosynthesis* / Q000276:immunology / Q000302:isolation & purification / Q000378:metabolism; D008213:Lymphocyte Activation / Q000187:drug effects; D008214:Lymphocytes / Q000276:immunology; D008264:Macrophages / Q000378:metabolism*; D008970:Molecular Weight; D051381:Rats; D013950:Thymus Gland / Q000166:cytology
chemical_list: D000914:Antibodies, Viral; D003470:Culture Media; D007370:Interferon Type I