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A selected ion flow tube-chemical ionization mass spectrometric method is presented for the first determination of acrolein metabolically produced in biological tissues. Acrolein in aqueous samples (2.5 ml) is preconcentrated by distillation and directly analyzed using gas-phase proton transfer from
Tetramethylrhodamine (TAMRA)-phenyl azide is a chemical probe used to detect intracellular acrolein directly in live cells. Herein, we demonstrated that TAMRA is the optimum fluorophore for the probe. TAMRA-phenyl azide was used to reveal that high levels of acrolein are generated in a variety of
Clean operating margins in breast cancer surgery are important for preventing recurrence. However, the current methods for determining margins such as intraoperative frozen section analysis or imprint cytology are not satisfactory since they are time-consuming and cause a burden on the patient and
Reactive oxygen species regulate protein functionality. Cell cycle CDC25 phosphatases are targets of such oxidative regulation in vitro. We sought to evaluate if a thioredoxin (trx)-dependent redox regulation of CDC25 exists in cancer cells. For that purpose, we used MCF7 and MDA-MB 231 breast
OBJECTIVE
MetXia-P450 is a novel recombinant retroviral vector that encodes the human cytochrome P450 type 2B6 gene (CYP2B6), Escherichia coli lacZ, and neomycin resistance marker genes. Cytochrome P450 enzymes are primarily expressed in the liver and convert the prodrug cyclophosphamide to an
Activated phagocytes employ myeloperoxidase to generate glycolaldehyde, 2-hydroxypropanal, and acrolein. Because alpha-hydroxy and alpha,beta-unsaturated aldehydes are highly reactive, phagocyte-mediated formation of these products may play a role in killing bacteria and tumor cells. Using breast
The alkylating agent cyclophosphamide is used in chemotherapy regimens for various type of cancer. However, cyclophosphamide may lead to toxic side effects on the bladder, namely hemorrhagic cystitis, which can cause hematuria and, potentially, bladder cancer. These effects are caused Most of breast cancer patients are treated with CMF, which is a combination of three anticancer agents, cyclophosphamide, methotrexate and 5-fluorouracil. Metabolites of CMF induce lipid peroxidation by inactivating the antioxidant enzymes, thereby rendering the system inefficient in management of
Efficiency of routine and modified Cuper procedures was studied after evaluation in saliva and urine of women with mammary gland tumor of the following parametres: alterations in dynamics of acrolein excretion with saliva, dynamics of alterations in calculated therapeutic doses of cyclophosphane
Pyruvate kinase catalyses the last step in glycolysis and has been suggested to contribute to the regulation of aerobic glycolysis in cancer cells. It can be inhibited by oxidation of cysteine residues in vitro and in vivo, which is relevant to the more pro-oxidant state in cancer and proliferating
Haemorrhagic Cystitis (HC) is defined as diffuse inflammatory bladder bleeding due to many aetiologies. Massive HC often arises from anticancer chemotherapy or radiotherapy for the treatment of pelvic malignancies. Phosphamides are the anti-cancer drugs used for treating breast cancer, B-cell
Cyclophosphamide is used for liver cancer, breast cancer and multiple myeloma, and the pretreatment of hematopoietic stem cell transplantation. A medium to high dose of cyclophosphamide is known to cause irreversible heart failure in some cases, and recently cardiac tamponade and pericarditis have
A number of investigators have observed that the use of 4-hydroperoxycyclophosphamide (4-HC) in multiwell plate cytotoxicity assays can be associated with toxicity to cells in wells that contain no drug. Previous reports have implicated diffusion of 4-HC decomposition products, and acrolein in
Gene directed-enzyme prodrug therapy (GDEPT) is an approach for sensitization of tumor cells to an enzymatically activated, otherwise nontoxic, prodrug. Cytochrome P450 2B1 (CYP2B1) metabolizes the prodrugs cyclophosphamide (CPA) and ifosfamide (IFA) to produce the cytotoxic substances phosphoramide
Abundant complex DNA adducts can be detected in human tissues by a combined 32P-postlabelling and high-performance liquid chromatography (HPLC) method. The HPLC profiles reveal a panorama of nuclease P1-resistant human adducts, which are not among the known human DNA adducts and are suspected of