In August, 1992, we established a leukemic cell line (NS-Meg) from a patient in megakaryoblastic transformation of Philadelphia chromosome- positive chronic myeloid leukemia. The NS-Meg cells were positive for α- naphthyl acetate esterase and periodic acid-Schiff (PAS) staining and for surface CD4, CD7, CD13, CD34, CD41a, and glycophorin A antigens. Ultrastructurally, the cells had α-granules, demarcation membranes, and platelet peroxidase activity. The NS-Meg cells spontaneously produced platelet-like particles which contained α-granules, mitochondria and dense bodies, strongly suggesting platelet production. Erythropoietin (Epo), granulocyte/macrophage colony stimulating factor(GM-CSF), and interleukin 3 (IL-3) promoted the growth of NS-Meg cells. Phorbol-12-myristate-13-acetate increased the expression of both CD41a and CD61 antigens. Ten-day exposure to Epo induced mature erythroblasts and red cells. These benzidine-positive cells were positive for hemoglobin F staining. Untreated NS-Meg cells expressed mRNA for the Epo receptor (EpoR), for GATA-1, and for α1, α2 and γ globin genes. These results indicate that NS-Meg cells undergo terminal differentiation of both megakaryocytic and erythroid lineages. This cell line should be a very useful tool for the investigation of both megakaryocytic and erythroid maturation.
|Number of pages||11|
|Publication status||Published - 1995|
ASJC Scopus subject areas
- Cell Biology