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Página 1 desde 3731 resultados
Inhibition of lung carcinogenesis and critical cancer-related signaling pathways by N-acetyl-S-(N-2-phenethylthiocarbamoyl)-l-cysteine, indole-3-carbinol and myo-inositol, alone and in combination.
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In an extension of our earlier studies, we examined the inhibitory effects of N-acetyl-S-(N-2-phenethylthiocarbamoyl)-l-cysteine (PEITC-NAC), myo-inositol (MI) and indole-3-carbinol (I3C) or 3,3'-diindolylmethane (DIM), alone and in combination, on 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone
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
Cysteine boosters the evolutionary adaptation to CoCl2 mimicked hypoxia conditions, favouring carboplatin resistance in ovarian cancer.
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Ovarian cancer is the second most common gynaecologic malignancy and the most common cause of death from gynaecologic cancer, especially due to diagnosis at an advanced stage, when a cure is rare. As ovarian tumour grows, cancer cells are exposed to regions of hypoxia. Hypoxia is known to be
Cysteine Aminotransferase (CAT): A Pivotal Sponsor in Metabolic Remodeling and an Ally of 3-Mercaptopyruvate Sulfurtransferase (MST) in Cancer
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Metabolic remodeling is a critical skill of malignant cells, allowing their survival and spread. The metabolic dynamics and adaptation capacity of cancer cells allow them to escape from damaging stimuli, including breakage or cross-links in DNA strands and increased reactive oxygen species (ROS)
Restoration of functional defects in peripheral blood mononuclear cells isolated from cancer patients by thiol antioxidants alpha-lipoic acid and N-acetyl cysteine.
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The ability of Alpha-Lipoic Acid (ALA) and N-Acetyl Cysteine (NAC), two active antioxidant agents, to correct in vitro the most significant functional defects of peripheral blood mononuclear cells (PBMC) isolated from advanced stage cancer patients was studied. The proliferative response of PBMC
Lysosomal cysteine peptidases - Molecules signaling tumor cell death and survival.
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Lysosomal cysteine peptidases - cysteine cathepsins - are general intracellular protein-degrading enzymes that control also a variety of specific physiological processes. They can trigger irreversible events leading to signal transduction and activation of signaling pathways, resulting in cell
A prospective study of plasma total cysteine and risk of breast cancer.
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Cysteine is the precursor of glutathione, a powerful intracellular antioxidant and an important detoxifying agent of carcinogens. However, data relating plasma total cysteine to breast cancer risk are sparse. We conducted a prospective nested case-control study among 32826 women in the Nurses'
L-cysteine and poly-L-arginine grafted carboxymethyl cellulose/Ag-In-S quantum dot fluorescent nanohybrids for in vitro bioimaging of brain cancer cells.
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Although noticeable scientific and technological progress, cancer remains one of the deadliest diseases worldwide and advancements in diagnosis, targeting and treating cancer cells are an urgency. In this study, we designed and synthesized novel amino acid and polypeptide modified polysaccharide
Facile synthesis of biocompatible L-cysteine-modified MoS 2 nanospheres with high photothermal conversion efficiency for photothermal therapy of tumor
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Photothermal therapy (PTT) can take advantage of the photothermal effects of photothermal agents to acquire the energy from laser irradiation and convert it into heat. This can intensively elevate the temperature of the surrounding environment to directly destroy the cancer cells. It is expected
Irreversible kinase inhibitors targeting to cysteine residues and their applications in cancer therapy.
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Protein kinases are the conserved enzymes that catalyze the phosphorilation process in cells and recognized as the targets for many diseases. FDA has approved many kinase inhibitors for the treatment of cancer and confirmed kinases as the relevant targets for drug discovery. Major approved drugs are
Non-invasive imaging of cysteine cathepsin activity in solid tumors using a 64Cu-labeled activity-based probe.
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The papain family of cysteine cathepsins are actively involved in multiple stages of tumorigenesis. Because elevated cathepsin activity can be found in many types of human cancers, they are promising biomarkers that can be used to target radiological contrast agents for tumor detection. However,
Increasing time on target: utilization of inhibitors of cysteine cathepsins to enhance the tumor retention of receptor-targeted agents.
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We report a strategy of utilizing irreversible cysteine cathepsin inhibitor as trapping agent to increase the tumor residence time of receptor-targeted agents. The targeted constructs incorporating these cysteine cathepsin trapping agents were able to form high molecular weight adducts with
Cysteine 230 modulates tumor necrosis factor-related apoptosis-inducing ligand activity.
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Biologically active tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) protein is known to form a homotrimer in solution. Unexpectedly, the recombinant active human TRAIL protein purified from bacteria produced two bands (a Mr 21,000 monomer derived from the disruption of the trimer in
Pteroyl-gamma-glutamate-cysteine synthesis and its application in folate receptor-mediated cancer cell targeting using folate-tethered liposomes.
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Cell membrane-associated folate receptors are selectively overexpressed in certain human tumors. The high affinity of folic acid for folate receptors provides a unique opportunity to use folic acid as a targeting ligand to deliver chemotherapeutic agents to cancer cells. Folate-tethered liposomes
Essential cysteine-alkylation strategies to monitor structurally altered estrogen receptor as found in oxidant-stressed breast cancers.
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Oxidant-induced structural modifications within the cysteine-rich DNA-binding domain (DBD) of the overexpressed estrogen receptor (ER) likely contribute to its loss of DNA-binding function and altered transcriptional activity during human breast cancer development. Using recombinant ER protein as a
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