Leukemic cells from a child with acute lymphoblastic leukemia (ALL) had high natural killer (NK) activity against K562 as determined by the 51Cr release assay at a 40:1 effector:target ratio: percent lysis was 76.8% (147.4% of normal lymphocyte value) and higher than that of control leukemic cells from 12 childhood ALL (0.1% ± 0.3%). Two leukemic cell lines (SPI-801 and SPI-802) were establishe...

Activation of cytosolic phospholipase A2 (cPLA2) by TNF has been shown to be an important component of the signaling pathway leading to cell death. The role of cPLA2 in the cytotoxic action of TNF was investigated in a panel of human leukemic cell lines. TNF could activate cPLA2 only in U937 and HL60 TNF-sensitive leukemic cells, but not in KG1a, CEM, and CEM/VLB100 cells that are relatively re...

Dibutyltin(IV) (2-methoxyethyl) methyldithiocarbamate (Compound 1) and tricyclohexyltin(IV) (2-methoxyethyl) methyldithiocarbamate (Compound 2) were used to evaluate their cytotoxicity against three human leukemic cell lines namely Jurkat E6.1, K562, and HL-60. The cytotoxicity of these compounds was assessed using MTT assay for treatment duration of 24 hours. The morphological changes were als...

A novel hematopoietic growth factor, the stem cell factor (SCF), for primitive hematopoietic progenitor cells has recently been purified and its gene has been cloned. In this study we tested the mitogenic activity of recombinant human SCF on myeloid leukemia cells as well as the expression of its receptor. We have investigated the proliferation of 31 myeloid leukemia cell lines as well as fresh...

Different derivatives of imatinib were synthesized by a 3-step reaction method. The structures the new compounds characterized spectroscopic methods. For quantitative evaluation biological activity compounds, MTT assays performed, where four BCR-ABL negative leukemic cell lines (Jurkat, Reh, Nalm-6 and Molt-4), one positive line (K562), non-leukemic (Hek293T) incubated with various concentratio...

Background and Objective: Peganum harmala is a medicinal plant that has been used for treatment of numerous diseases including viral, bacterial and parasitic infections. Anti-proliferative and anti-tumor effects of Peganum harmala extracts and its derivatives have been reported. In the present study, cytotoxic effect of Peganum harmala seeds aquaous extract on leukemic U937 and Molt-4 cells was...