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Does l-glutamine-supplemented diet extenuate NO-mediated damage on myenteric plexus of Walker 256 tumor-bearing rats?

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This study was designed to appraise the relationship between enteric neuropathy and oxidative stress in cancer cachexia under l-glutamine-supplemented diet. Total and nitrergic neuronal populations were investigated in jejunum and ileum in four experimental groups: control (C); control

L-glutamine: a major substrate for tumor cells in vivo?

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From 65 human breast cancer xenografts investigated, a net glutamine uptake was found in 13 tumors (mean +/- SE: 15.7 +/- 4.5 nmol/g per min) whereas a net release (22.5 +/- 3.3 nmol/g per min) was observed in 40 tumors. In 12 tumors neither a significant net uptake nor a net release was obvious.

The efficacy of sodium azulene sulfonate L-glutamine for managing chemotherapy-induced oral mucositis in cancer patients: a prospective comparative study.

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UNASSIGNED The efficacy of sodium azulene sulfonate L-glutamine (GA) in treating oral mucositis caused by the administration of anticancer agents has not been previously elucidated. Therefore, this prospective comparative study was conducted to evaluate the efficacy of GA in treating oral mucositis

Facile synthesis [5-(13)C-4-(2)H(2)]-L-glutamine for hyperpolarized MRS imaging of cancer cell metabolism.

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OBJECTIVE Recent reports suggest that cancer cells may use glutamine, instead of glucose, as an alternative source of metabolic energy. This suggests that hyperpolarized (13)C glutamine may be useful as a magnetic resonance spectroscopy (MRS) imaging agent for detecting changes in glutamine

L-glutamine Schiff base copper complex as a proteasome inhibitor and an apoptosis inducer in human cancer cells.

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Interest in the use of metallic compounds for cancer treatment has been increasing since the discovery of cisplatin. Clinical studies suggest the use of proteasome inhibitors as potential novel anticancer agents. L-glutamine is the most abundant free amino acid in the body, and has been shown to

Imaging of spontaneous canine tumours with ammonia and L-glutamine labeled with N-13.

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Ammonia and 6-glutamine, labeled with N-13, were tested as imaging agents for a variety of spontaneous canine tumors. The imaging capabilities of these compounds were compared with each other, with other scanning agents, and with radiologic and pathologic procedures. Good agreement between positive

Role of protein dissociation in the transport of acidic amino acids by the Ehrlich ascites tumor cell.

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The pH profile for the uptake of L-glutamic acid by the Ehrlich ascites tumor cell arises largely as a sum of the decline with falling pH of a slow, Na+-dependent uptake by System A, and an increasing uptake by Na+-independent System L. The latter maximizes at about pH 4.5, following approximately

Tumor cell culture survival following glucose and glutamine deprivation at typical physiological concentrations.

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OBJECTIVE Most glucose (and glutamine)-deprivation studies of cancer cell cultures focus on total depletion, and are conducted over at least 24 h. It is difficult to extrapolate findings from such experiments to practical anti-glycolytic treatments, such as with insulin-inhibiting diets (with

Dietary L-glutamine supplementation reduces the growth of the Morris Hepatoma 7777 in exercise-trained and sedentary rats.

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Dietary glutamine supplementation and exercise have been reported independently to enhance immune function and reduce tumor growth. We study the effect of both of these interventions on the growth of the Morris Hepatoma 7777, implanted in 59 female Sprague-Dawley Buffalo rats. Rats were fed a

Differential effects of metformin on reductive activity and energy production in pituitary tumor cells compared to myogenic precursors

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Purpose: Given the multiple targets of metformin within cells, the mechanism by which it may exert a growth-inhibitory action on pituitary tumor cells in vitro remains to be explored. Previous research stressed metformin-induced changes

Mitochondrial glutathione depletion by glutamine in growing tumor cells.

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The effect of L-glutamine (Gln) on mitochondrial glutathione (mtGSH) levels in tumor cells was studied in vivo in Ehrlich ascites tumor (EAT)-bearing mice. Tumor growth was similar in mice fed a Gln-enriched diet (GED; where 30% of the total dietary nitrogen was from Gln) or a nutritionally complete

VER-246608, a novel pan-isoform ATP competitive inhibitor of pyruvate dehydrogenase kinase, disrupts Warburg metabolism and induces context-dependent cytostasis in cancer cells.

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Pyruvate dehydrogenase kinase (PDK) is a pivotal enzyme in cellular energy metabolism that has previously been implicated in cancer through both RNAi based studies and clinical correlations with poor prognosis in several cancer types. Here, we report the discovery of a novel and selective ATP

Augmentation of the intracellular levels of polyglutamyl derivatives of methotrexate by vincristine and probenecid in Ehrlich ascites tumor cells.

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The intracellular accumulation of poly-gamma-glutamyl derivatives of methotrexate was evaluated in the presence of vincristine or probenecid (agents which raise the intracellular level of free methotrexate) in Ehrlich ascites tumor cells. The results show that both intracellular methotrexate and its

Characteristics of the accumulation of methotrexate polyglutamate derivatives in Ehrlich ascites tumor cells and isolated rat hepatocytes.

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The intracellular synthesis and retention of polygammaglutamyl derivatives of methotrexate and their interactions with H2 folate reductase was evaluated in the Ehrlich ascites tumor cell and the isolated rat hepatocyte. Methotrexate polyglutamates were detected within 15 minutes in hepatocytes

Anti-tumor efficacy evaluation of a novel monoclonal antibody targeting neutral amino acid transporter ASCT2 using patient-derived xenograft mouse models of gastric cancer.

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ASC amino acid transporter 2 (ASCT2), also known as solute linked carrier family 1 member A5 (SLC1A5) is a Na+-dependent glutamine/neutral amino acid transporter. ASCT2 acts as a high-affinity transporter of L-glutamine (Gln) and has been reported to be up-regulated in a variety of cancerous tissues

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