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Chemical ionization mass spectrometric determination of acrolein in human breast cancer cells.

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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 is an essential scaffold of azide probe in detecting cellular acrolein.

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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

Cascade Reaction in Human Live Tissue Allows Clinically Applicable Diagnosis of Breast Cancer Morphology.

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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

Protection of CDC25 phosphatases against oxidative stress in breast cancer cells: evaluation of the implication of the thioredoxin system.

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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

Phase I study of MetXia-P450 gene therapy and oral cyclophosphamide for patients with advanced breast cancer or melanoma.

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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

Glycolaldehyde induces apoptosis in a human breast cancer cell line.

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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

QUANTIFICATION OF 3-HYDROXYPROPYL MERCAPTURIC ACID IN THE URINE OF PATIENTS WITH BREAST CANCER TO MONITOR CYCLOPHOSPHAMIDE TOXICITY.

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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

Erythrocyte antioxidant enzyme activity in CMF treated breast cancer patients.

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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

[Comparative study of the effectiveness of the classical and modified Cooper protocol for breast cancer chemotherapy].

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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

Short-chain lipid peroxidation products form covalent adducts with pyruvate kinase and inhibit its activity in vitro and in breast cancer cells.

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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

Treatment of Resıstant Cyclophosphamide Induced Haemorrhagic Cystıtıs: Revıew of Literature and Three Case Reports.

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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

[Analysis of cardiac toxicity caused by cyclophosphamide in the H9c2 cell line and isolated and perfused rat hearts].

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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

Evidence for a role of chloroethylaziridine in the cytotoxicity of cyclophosphamide.

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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

Mouse mammary tumor virus promoter-containing retroviral promoter conversion vectors for gene-directed enzyme prodrug therapy are functional in vitro and in vivo.

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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

32P-postlabelling with high-performance liquid chromatography for analysis of abundant DNA adducts in human tissues.

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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

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