Abstract Seven novel azo dyes with 2-pyridone and dihydropyrimidinone moieties have been synthesized thoroughly characterized. The azo-hydrazone tautomerism has investigated by experimental theoretical approaches. optimizations of geometries performed density functional theory (DFT). vibrational NMR spectra were calculated correlated ones. Furthermore, quantum chemical descriptors MEP maps plot...

Apoptosis is a programmed cellular process that occurs in pathological and physiological pathways it one of the most studied topics cell biology. To understand underlying mechanism apoptosis plays an important role molecular pathogenesis many diseases including cancers. Chronic myeloid leukemia (CML) clonal myeloproliferative malignancy arising from neoplastic transformation hematopoietic stem ...

Tescalcin (TESC) has been shown to be essential in mammalian cells as a regulator of intracellular Ca2+. Ca2+ is second messenger functioning many metabolic pathways well cell differentiation, size and the cycle. K562 over-expressing TESC change their morphology adopt adherent properties. Considering differences may have reflected changes cytoskeleton, we focused on expression levels keratins, ...

In this article, reversal activities of Euphorbia factor L1 (EFL1) against ABCB1-mediated multidrug resistance (MDR) and apoptosis sensitization in K562/ADR cells are reported. EFL1 decreased the IC50 values of anticancer agents in K562/ADR cells over-expressing ABCB1. However, EFL1 did not affect the IC50 values of anticancer agents in sensitive K562 cells. Additionally, EFL1 increased the int...

Problem statement: Cellular drug resistance to anticancer agents is major obstacle in cancer chemotherapy and the mechanisms by which these MDR cells possess for protecting themselves to survive prolonged exposure to cytotoxic agents still debating. The study aimed to clarify the role of P-glycoprotein (Pgp) and enhanced drug sequestration in lysosomes to confer the multidrug resistance K562 ce...

Human chronic myelogenous leukemia-blast crisis K562 cells have been demonstrated to be relatively resistant to antileukemic drug-induced apoptosis. This has been attributed to the activity of p210bcr-abl tyrosine kinase present in the K562 cells, which is known to suppress drug-induced apoptosis. Recently, K562 cells have been shown to express the antiapoptosis Bcl-xL but not Bcl-2 proteins. T...

This study was purposed to investigate the effect of phycocyanin at different concentration on proliferation of K562 cells, to detect the changes of integrin beta1 expression and intracellular focal adhesion kinase (FAK) gene expression on the surface K562 cells treated with phycocyanin, and to explore the possible mechanism of integrin beta1 effect on phycocyanin inhibiting proliferation of K5...

We have investigated the molecular basis of the 100-fold resistance of mutant human erythroleukemia K562/PMEA-1 cells to the antiproliferative potential of 9-(2-phosphonylmethoxyethyl)adenine (PMEA). Upon exposure to high PMEA concentrations, comparable intracellular PMEA levels were initially observed in mutant K562/PMEA-1 and wild-type K562/0 cells, indicating that PMEA influx was unaltered. ...

Membrane currents were examined in a drug-sensitive human leukemia cell line (K562) and its multidrug-resistant cell line (K562/ADM) under the whole-cell variation of the patch electrode voltage clamp technique. Most K562 cells showed only the outward current, which was completely suppressed by internal Cs* ions and 20 HIMethyleneglycol bis(0-aminoethyl ctht-r)-.V..V..V. V'-tetraacelkacid. In c...

BACKGROUND Leukemia seriously threatens human life and health. MicroRNAs can regulate cell growth, proliferation, and death. This article investigated the role of miR-29 on regulating leukemia cell growth, proliferation, and apoptosis. MATERIAL AND METHODS miR-29 and scramble miRNA were transfected to K562 cells. MTT assay, colony formation assay, caspase-3 activity detection, and flow cytome...