glutathione/neoplasms

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Association between glutathione-S-transferase GSTP1 genotypes, GSTP1 over-expression, and outcome in epithelial ovarian cancer.

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Ovarian cancer accounts for the majority of deaths from gynaecological malignancy, and polymorphisms in genes encoding the glutathione-S-transferase (GST) GSTP1 detoxifying enzymes may lead to variation in detoxification of carcinogens. We describe a study involving 81 women with invasive epithelial

Expression of glutathione S-transferase-pi and sensitivity of human gastric cancer cells to cisplatin.

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BACKGROUND The authors examined the correlation between the expression of glutathione S-transferase-pi (GST pi) and the sensitivity of gastric cancer to anticancer agents. METHODS In 62 human gastric carcinomas, the expression of GST pi was immunohistochemically evaluated, and sensitivity to the

Genetic polymorphisms of human cytosol glutathione S-transferases and prostate cancer.

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Glutathione S-transferases (GSTs) are involved in the metabolism of a wide range of carcinogenic chemicals. In humans, cytosol GSTs are divided into eight classes: alpha (GSTA), mu (GSTM), pi (GSTP), theta (GSTT), tau (GSTZ), sigma (GSTS), omicron (GSTO) and kappa (GSTK). The allelic polymorphism of

2-Acetylamino-3-[4-(2-acetylamino-2-carboxyethylsulfanylcarbonylamino) phenyl carbamoylsulfanyl] propionic acid, a glutathione reductase inhibitor, induces G2/M cell cycle arrest through generation of thiol oxidative stress in human esophageal cancer cells.

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Esophageal squamous cell carcinoma (ESCC) is a highly malignant cancer with poor response to both of chemotherapy and radiotherapy. 2-Acetylamino-3-[4-(2-acetylamino-2-carboxyethylsulfanylcarbonylamino) phenyl carbamoylsulfanyl] propionic acid (2-AAPA), an irreversible inhibitor of glutathione

The role of thioredoxin reductase and glutathione reductase in plumbagin-induced, reactive oxygen species-mediated apoptosis in cancer cell lines.

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Plumbagin is a secondary metabolite that was first identified in the Plumbago genus of plants. It is a naphthoquinone compound with anti-atherosclerosis, anticancer, anti-inflammatory, antimicrobial, contraceptive, cardiotonic, immunosuppressive, and neuroprotective activities. However, the

The gut fermentation product butyrate, a chemopreventive agent, suppresses glutathione S-transferase theta (hGSTT1) and cell growth more in human colon adenoma (LT97) than tumor (HT29) cells.

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OBJECTIVE The gut fermentation product of dietary fiber, butyrate, inhibits growth of HT29, an established tumor cell line. It also induces detoxifying enzymes belonging to the glutathione S-transferase family (GSTs), namely hGSTM2, hGSTP1, hGSTA4, but not of hGSTT1 . Here we investigated kinetics

Evidence for functionally significant polymorphism of human glutamate cysteine ligase catalytic subunit: association with glutathione levels and drug resistance in the National Cancer Institute tumor cell line panel.

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Glutamate-cysteine ligase (GCL) is the first and rate-limiting enzyme involved in the biosynthesis of glutathione (GSH). The GCL heterodimer is encoded by two genes: GLCLC, which directs synthesis of the catalytic subunit, and GLCLR, which encodes the regulatory subunit. We have previously

Novel oxadiazole analogues derived from ethacrynic acid: design, synthesis, and structure-activity relationships in inhibiting the activity of glutathione S-transferase P1-1 and cancer cell proliferation.

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Ethacrynic acid (EA) is a glutathione S-transferase P1-1 (GST P1-1) inhibitor with weak antiproliferative ability in tumor cells. By use of the principle of bioisosterism, a series of novel EA oxadiazole analogues were designed and synthesized. The structure-activity relationships of inhibiting GST

Effects of garlic and onion oils on glutathione peroxidase activity, the ratio of reduced/oxidized glutathione and ornithine decarboxylase induction in isolated mouse epidermal cells treated with tumor promoters.

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Garlic oil, onion oil and one of its constituents, dipropenyl sulfide, all increase, to diverse degrees, glutathione (GSH) peroxidase (GSH:H2O2 oxidoreductase, EC 1.11.1.9) activity in isolated epidermal cells incubated in the presence or absence of the potent tumor promoter

Effects of allyl methyl trisulfide on glutathione S-transferase activity and BP-induced neoplasia in the mouse.

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Allyl methyl trisulfide (AMT), a constituent of garlic oil, was studied for its effects on glutathione S-transferase (GST) activity and on benzo[a]pyrene (BP)-induced neoplasia of the forestomach and lungs of female A/J mice. AMT induced increased GST activity in the forestomach, small bowel mucosa,

Effects of organosulfur compounds from garlic and onions on benzo[a]pyrene-induced neoplasia and glutathione S-transferase activity in the mouse.

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In the present study, eight organosulfur compounds from garlic and onions were studied for their inhibitory effects on benzo[a]pyrene (BP)-induced neoplasia of forestomach and lung of female A/J mice when administered 96 and 48 h prior to carcinogen challenge. These compounds had one, two or three

Reversal of hypermethylation and reactivation of glutathione S-transferase pi 1 gene by curcumin in breast cancer cell line.

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One of the mechanisms for epigenetic silencing of tumor suppressor genes is hypermethylation of cytosine residue at CpG islands at their promoter region that contributes to malignant progression of tumor. Therefore, activation of tumor suppressor genes that have been silenced by promoter methylation

Noninvasive in vivo detection of glutathione metabolism in tumors.

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Magnetic resonance spectroscopic imaging has been used to follow glutathione metabolism and evaluate glutathione heterogeneity in intact tumor tissue. Stable isotope-labeled glutathione was detected in s.c. implanted fibrosarcoma tumors in anesthetized rats following infusion of [2-13C]glycine.

Isozyme-specific glutathione S-transferase inhibitors potentiate drug sensitivity in cultured human tumor cell lines.

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Novel glutathione (GSH) analogs, previously shown to inhibit glutathione S-transferase (GST) activity at about 1 microM in vitro, were tested for their ability to potentiate the killing of cultured tumor cells by chemotherapeutic drugs. When tested at doses up to 200 microM, the analogs were neither

Cancer-targeted and glutathione-responsive micellar carriers for controlled delivery of cabazitaxel.

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Novel type of multifunctional polymeric micelles (PMs) designated as HM-PMss/CTX micelles were developed in the present study for tumor-targeted and glutathione (GSH)-responsive delivery of cabazitaxel (CTX). The surface of the vehicles was modified with piloting molecules (HM-3 peptide), which

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