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Selective growth response to IL‐3 of a human leukaemic cell line with megakaryoblastic features
Author(s) -
Avanzi Gian Carlo,
Lista Patrizia,
Giovinazzo Bruna,
Miniero Roberto,
Saglio Giuseppe,
Benetton Gabriella,
Coda Renato,
Cattoretti Giorgio,
Pegoraro Luigi
Publication year - 1988
Publication title -
british journal of haematology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.907
H-Index - 186
eISSN - 1365-2141
pISSN - 0007-1048
DOI - 10.1111/j.1365-2141.1988.tb02374.x
Subject(s) - antigen , biology , cell culture , population , microbiology and biotechnology , progenitor cell , growth factor , epitope , immunology , stem cell , biochemistry , medicine , genetics , receptor , environmental health
A new human leukaemic cell line (M‐O7) with the phenotypic characteristics of CFU‐mega is described. Its cells are positive for T200 leucocyte common antigen (LCA) and negative with MAbs recognizing T and B cells and mature myelomonocytic antigens. In contrast, they react with MAbs recognizing antigenic determinants common to multilineage (CD13, CD33, CD34) and to bipotent erythromegakaryoblastic (CD36, H25) haemopoietic precursors, and with MAbs specific for platelet glycoproteins (CD41w, CD42w). A small proportion (10%) of the cells were large and multinucleated, and on electron microscopy examination showed peripheral splitting of platelet‐like cytoplasm particles. When transferred to a serum‐free Iscove modified Dulbecco's medium supplemented with human insulin and transferrin, M‐O7 cells stop proliferating. Of the haemopoietic growth factors tested for their ability to restore the proliferative activity of this quiescent population, only rH IL‐3 proved effective. Moreover, it also increased the cloning efficiency in methylcellulose more than any other CSFs. The M‐O7 cell line may provide a valuable tool for the biological assay of IL‐3, and a model for biochemical studies of the megakaryocytic lineage.