title: Circulating malignant precursors in monoclonal gammopathies.
abstract: Peripheral blood mononuclear cells (PBMC) from 14 patients with multiple myeloma (MM), 3 patients with benign monoclonal gammopathy, 3 patients with Waldenstrom's macroglobulinaemia (WM) and 2 patients with B-cell chronic lymphocytic leukemia (B-CLL) were cultured in vitro in the presence of IL-3 and IL-6. After 3 days, actively proliferating immunoblast-like B cells were apparent in 12/14 cases of MM, 0/3 BMG, 3/3 WM and 0/2 B-CLL. After 6 d, B blasts had evolved into morphologically evident plasma cells expressing the specific monoclonal light and heavy chains. The data indicate that the concerted action of IL-3 and IL-6 synergistically promotes the proliferation and differentiation of circulating plasmacell precursors in malignant monoclonal gammopathies.
authors.forename: F
authors.initials: F
authors.lastname: Caligaris-Cappio
authors.forename: L
authors.initials: L
authors.lastname: Bergui
authors.forename: G L
authors.initials: GL
authors.lastname: Gaidano
authors.forename: M
authors.initials: M
authors.lastname: Schena
authors.forename: P
authors.initials: P
authors.lastname: Putto
authors.forename: F
authors.initials: F
authors.lastname: Merico
authors.forename: M
authors.initials: M
authors.lastname: Riva
mesh_terms: D002454:Cell Differentiation / Q000187:drug effects; D002455:Cell Division / Q000187:drug effects; D004357:Drug Synergism; D006801:Humans; D007377:Interleukin-3 / Q000494:pharmacology; D015850:Interleukin-6 / Q000494:pharmacology; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000097:blood* / Q000473:pathology; D009360:Neoplastic Cells, Circulating / Q000187:drug effects / Q000473:pathology; D014411:Neoplastic Stem Cells / Q000187:drug effects; D010265:Paraproteinemias / Q000097:blood* / Q000473:pathology; D014407:Tumor Cells, Cultured / Q000187:drug effects
chemical_list: D007377:Interleukin-3; D015850:Interleukin-6