We investigated the effects of a benzoate of an estradiol-chlorambucil conjugate (KM2210) and chlorambucil on growth, estrogen receptor, and secretion of transforming growth factor (TGF)-a in the hormone-depend ent human breast cancer cell line MCF-7. In the presence of 10"'°-10~' M KM2210, the estrogen-induced growth of MCF-7 was completely inhibited. Inhibited growth of MCF-7 treated with 10...

This study was designed to investigate the role of protein kinase C (PKC) and extracellular signal-regulated kinase 1/2 (ERK1/2) signaling in tamoxifen (TAM)-induced apoptosis and drug resistance in human breast cancer cells. Drug-sensitive, or estrogen receptor (ER)-positive human breast carcinoma cells (MCF-7) and the multi-drug-resistant variant (ER-negative) MCF-7/ADR cells were treated wit...

Cancer is a disease that invades the lives of millions people each year. Chemotherapy currently most effective treatment however resulting in many adverse effects to human body. Alternative treatments are being explored overcome this obstacle. Peptides possess radical scavenging activity and bioactive properties can be advantageous prevention chronic diseases. In study, Lablab purpureus isolate...

Bisphenol A (BPA) is a monomer use in manufacturing a wide range of chemical products which include epoxy resins and polycarbonate. It has been reported that BPA increases the cell proliferation activity of human breast cancer MCF-7 cells as well as 17-beta estradiol (E2) and diethylstilbestrol (DES). However, BPA induces target genes through ER-dependent and ER-independent manners which are di...

Widespread use of MCF-7 human breast carcinoma cells as a model system for breast cancer has led to variations in these cells between different laboratories. Although several reports have addressed these differences in terms of proliferation and estrogenic response, variations in sensitivity to apoptosis have not yet been described. Tumor necrosis factor alpha (TNF-alpha) has been shown to both...

Paclitaxel (PTX) is one of the most effective drugs used in treatment breast cancer. Nonetheless, appearance MDR1 (multidrug resistance 1) tumor cells has become a significant hindrance for efficacious chemotherapy. In this study, we show that expression level Egr-1 (early growth response gene-1) cancer tissues (from paclitaxel chemotherapy failure patients) and MCF-7/PTX (the cell line was res...

the aim of this study was to develop a novel multifunctional nanoparticle, which encapsulates spion and gemcitabine in plga±peg to form multifunctional drug delivery system. for this aim, super paramagnetic iron oxide nanoparticles (spions) were synthesized and encapsulated simultaneously with gemcitabine (gem) in plga±peg copolymers via w/o/w double emulsification method. optimum size and enca...

A novel series of 2-methyl-3-phenylquinazolin-4-one derivatives were synthesized and biologically evaluated for their cytotoxic potential against MCF-7, HepG2, PC-3 cancer cells. Most the tested compounds showed reasonable safety in normal human skin melanocyte HFB4 cell line. Compound 4 potent cytotoxicity on Hep-G2 lines, while compound 9 MCF-7 line, whereas 10 12 lines using 5-fluorouracil a...

Pharmacological inhibitors of the human ether-a-go-go (hEAG) potassium channel, astemizole and imipramine, have been used to demonstrate that hEAG plays a role in cancer cell proliferation. Astemizole and imipramine are, however, relatively non-specific ion channel blockers, as astemizole can also block the related potassium channel, human ether-a-go-go-related (hERG). Therefore, we aimed to de...

This study tries to elucidate the anti-proliferative and apoptotic effects of methanolic lichen extracts from Cladonia rangiformis and Cladonia convolute in MCF-7 human breast cancer cells. Lichen extracts (0-2 mg/ml) were added to MCF-7 cells for 24 h. Cell viability was tested using 3-(4,5-dimethylthiazol- 2-yl)-2,5 diphenyltetrazolium bromide (MTT) assay. Cell proliferation was observed usin...