l arginine/cáncer

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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

Induction of hypoxia in experimental murine tumors by the nitric oxide synthase inhibitor, NG-nitro-L-arginine.

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The nitric oxide synthase inhibitor NG-nitro-L-arginine (NOARG) was examined for its ability to alter energy metabolism in three murine tumors using 31P magnetic resonance spectroscopy. NOARG (10 mg/kg, i.v.) increased the inorganic phosphate:total phosphate ratio (Pi:total) 2-3-fold in the KHT,

The comparative effects of the NOS inhibitor, Nomega-nitro-L-arginine, and the haemoxygenase inhibitor, zinc protoporphyrin IX, on tumour blood flow.

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OBJECTIVE To determine the relative effects of inhibiting nitric oxide synthase (NOS) and haemoxygenase (HO) on blood flow to the rat P22 carcinosarcoma. METHODS HO is the enzyme responsible for in vivo production of carbon monoxide (CO). The vascular effects of zinc protoporphyrin IX (ZnPP), a

Effect of nitro-L-arginine on blood flow, oxygenation and the activity of hypoxic cell cytotoxins in murine tumours.

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This study was an investigation into the ability of nitro-L-arginine to change blood flow, oxygenation status and the activity of hypoxic cell cytotoxic agents in two different transplanted murine tumours. The tumour models were the C3H mammary carcinoma grown in the feet of female CDF1 mice and the

Dietary supplementation with L-arginine in patients with breast cancer (> 4 cm) receiving multimodality treatment: report of a feasibility study.

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L-Arginine has been shown, in human breast cancers, to increase protein synthesis and the number of cells in the growth phase of the cell cycle. L-Arginine, therefore, may potentiate the response of breast cancers to cell cycle-specific cytotoxic agents. This phase II pilot study assessed the

Tumor-infiltrating regulatory dendritic cells inhibit CD8+ T cell function via L-arginine metabolism.

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Dendritic cells (DC) have a critical effect on the outcome of adaptive immune responses against growing tumors. Whereas it is generally assumed that the presence of phenotypically mature DCs should promote protective antitumor immunity, evidence to the contrary does exist. We describe here a novel

Targeting the L-arginine-nitric oxide pathway for cancer treatment.

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The action of L-arginine is mainly dependent on its end-product, nitric oxide (NO). The L-arginine/NO pathway has been confirmed to play an important role in tumor development. Recent findings indicate that NO derived from L-arginine could influence angiogenesis factors, vascular permeability,

Natural cytotoxicity in breast cancer patients receiving neoadjuvant chemotherapy: effects of L-arginine supplementation.

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Certain cytotoxic drugs have been shown to suppress host anti-cancer defence mechanisms. The amino acid L-arginine can significantly enhance natural killer (NK) and lymphokine-activated killer (LAK) cell cytotoxicity in patients with locally advanced breast cancer. In this study, the effect of

The L-arginine/asymmetric dimethylarginine ratio is improved by anti-tumor necrosis factor-α therapy in inflammatory arthropathies. Associations with aortic stiffness.

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BACKGROUND Anti-Tumor Necrosis Factor (TNF)-α therapy improves vascular pathology in inflammatory arthropathies such as rheumatoid arthritis, ankylosing spondylitis and psoriatic arthritis. The l-arginine/ADMA ratio is important for modulation of the nitric oxide synthase activity. We examined the

Relaxin activates the L-arginine-nitric oxide pathway in human breast cancer cells.

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Recently, we demonstrated that relaxin (RLX), a peptide hormone of ovarian origin, inhibits growth and promotes differentiation of MCF-7 breast adenocarcinoma cells. We also showed that RLX stimulates the production of nitric oxide (NO) in several cell types. NO has been reported to have antitumor

The potential therapeutic effect of NG-hydroxy-nor-L-arginine in 7,12-dimethylbenz(a)anthracene-induced breast cancer in rats.

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Advances in our understanding of the metabolism and molecular functions of arginine and their alterations in cancer have led to resurgence in the interest of targeting arginine catabolism as an anticancer strategy. Therefore, arginase inhibitors have been proposed as a way to treat cancer. In this

Regulation of apoptosis in human gastric cancer cell line SGC-7901 by L-arginine.

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Aim: L-arginine (LArg) is an amino acid that has immunomodulating and anti-tumor effects. It is possible that anti-tumor effects of L-Arg are due to induction of apoptosis in tumor cells. The present study assessed anti-proliferating and pro-apoptotic effects of L-Arg in human gastric cancer cell

Nitric oxide synthase inhibition by N(G)-nitro-L-arginine methyl ester inhibits tumor-induced angiogenesis in mammary tumors.

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Using a murine breast cancer model, we earlier found a positive correlation between the expression of nitric oxide synthase (NOS) and tumor progression; treatment with inhibitors of NOS, N(G)-methyl-L-arginine (NMMA) and N(G)-nitro-L-arginine methyl ester (L-NAME), had antitumor and antimetastatic

Poly-L-arginine and dextran sulfate-based nanocomplex for epidermal growth factor receptor (EGFR) siRNA delivery: its application for head and neck cancer treatment.

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OBJECTIVE A poly-L-arginine (PLR) and dextran sulfate (DEX)-based nano-sized polyelectrolyte complex (nanocomplex) was developed for epidermal growth factor receptor (EGFR) siRNA delivery for the treatment of head and neck cancer. METHODS PLR and DEX-based nanocomplex including EGFR siRNA was

Effects of N(g)-methyl-L-arginine, an inhibitor of nitric oxide synthesis, on interleukin-2-induced capillary leakage and antitumor responses in healthy and tumor-bearing mice.

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We tested whether treatment with an inhibitor of nitric oxide synthesis (Ng-methyl-L-arginine, MeArg) can ameliorate interleukin-2(IL-2)-therapy-induced capillary leak syndrome in healthy or tumor-bearing mice without compromising the antitumor effects of IL-2 therapy. Healthy or

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