acetic acid/hypoxia

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Effect of hypoxia on acetic acid ulcer of the stomach in rats with or without coenzyme Q10.

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As one of the factors contributing to the intractability of chronic gastric ulcer, the effect of hypoxia is examined in this paper, based upon the experimental acetic acid ulcer in the stomach of Wistar rats. Results indicate that hypoxia has a harmful influence on the healing process of chronic,

Scintigraphic imaging of the hypoxia marker (99m)technetium-labeled 2,2'-(1,4-diaminobutane)bis(2-methyl-3-butanone) dioxime (99mTc-labeled HL-91; prognox): noninvasive detection of tumor response to the antivascular agent 5,6-dimethylxanthenone-4-acetic acid.

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5,6-Dimethylxanthenone-4-acetic acid (DMXAA) and combretastatin A4 phosphate (CA-4-P) markedly inhibit tumor blood flow in mice and are both currently in clinical trial. One of the challenges in clinical evaluation of antivascular agents is the monitoring of tumor blood flow inhibition in individual

Induction of hypoxia in the KHT sarcoma by tumour necrosis factor and flavone acetic acid.

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The interaction of FAA or TNF with radiation was studied in the murine KHT sarcoma. When used alone both agents showed a dose- and time-dependent toxicity towards the tumour cells and significantly reduced tumour blood flow within 1 h of treatment. When used in combination with radiation, both TNF

Synthesis of [18F]fluoroetanidazole: a potential new tracer for imaging hypoxia.

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A method has been developed for the synthesis of [18F]fluoroetanidazole, a potential tracer for imaging hypoxia with positron emission tomography. The compound is prepared by an active ester coupling reaction between the 2,3,5,6-tetrafluorophenyl ester of 2-nitroimidazole acetic acid and

Preconditioning of Cardiosphere-Derived Cells With Hypoxia or Prolyl-4-Hydroxylase Inhibitors Increases Stemness and Decreases Reliance on Oxidative Metabolism.

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Cardiosphere-derived cells (CDCs), which can be isolated from heart explants, are a promising candidate cell source for infarcted myocardium regeneration. However, current protocols used to expand CDCs require at least 1 month in vitro to obtain sufficient cells for transplantation. We report that

Anoxia promotes gravitropic curvature in rice pulvini but inhibits it in wheat and oat pulvini.

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Gravitropic curvature of pulvini of wheat and oat stem segments gradually declined with decreasing atmospheric O₂ concentration and was almost completely blocked under anoxia, whereas that of rice stem segments was enhanced under hypoxia and anoxia. Anoxia substantially increased the ethanol content

Oxygen sensitivity of reporter genes: implications for preclinical imaging of tumor hypoxia.

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Reporter gene techniques have been applied toward studying the physiologic phenomena associated with tumor hypoxia, a negative prognostic indicator. The purpose of this study was to assess the potential adverse effects of hypoxic conditions on the effectiveness of four commonly used reporter genes:

Synthesis and biological evaluation of a 99mTc-labelled sulfonamide conjugate for in vivo visualization of carbonic anhydrase IX expression in tumor hypoxia.

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BACKGROUND Carbonic anhydrase (CA) IX is a transmembrane protein overexpressed in many frequently occurring tumors associated with tumor hypoxia. Sulfonamides and their bioisosteres are known to inhibit CA IX activity. In this study, 4-(2-aminoethyl)benzenesulfonamide was conjugated to a tridentate

Therapeutic effects of Choreito, a traditional Japanese (Kampo) medicine, on detrusor overactivity induced by acetic acid in rats.

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Choreito (CRT), a traditional Japanese (Kampo) medicine, is widely used for the treatment of overactive bladder (OAB) and other lower urinary tract symptoms in Japan. This study aimed to identify the effects and therapeutic mechanism of CRT on the improvement of detrusor overactivity (DO) using an

18F-fluromisonidazole PET imaging as a biomarker for the response to 5,6-dimethylxanthenone-4-acetic acid in colorectal xenograft tumors.

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The aim of this study was to evaluate (18)F-fluromisonidazole ((18)F-FMISO) PET for monitoring the tumor response to the antivascular compound 5,6-dimethylxanthenone-4-acetic acid (DMXAA; vadimezan). METHODS (18)F-FMISO PET was performed 3 h before and 24 h after treatment with DMXAA (20 mg/kg) in

Endothelial cell phospholipid distribution and phospholipase activity during acute and chronic hypoxia.

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We have previously reported alterations in cyclooxygenase metabolism in cultured aortic and pulmonary arterial endothelial cells exposed to acute and chronic hypoxia. These alterations depended on the duration and degree of the hypoxic exposure, on the vascular bed from which the endothelial cells

[The effect of pyrazidole on monoamine level in hypobaric hypoxia].

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Increase of serotonin content and decrease in 5-hydroxyindolyl acetic acid (5-HIAA) were observed under hypoxic conditions (9,000 m, 3 hrs) which correlated with inhibition of monoamine oxidase A. Administration of the monoamine oxidase inhibitor pyrazidole caused the more pronounced increase of

Cerebral and adrenal monoamine metabolism in the growth-retarded rat fetus under normoxia and hypoxia.

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The effect of intrauterine growth retardation (IUGR) on cerebral and adrenal monoamine metabolism was studied in the fetuses of eight nulliparous rat dams after unilateral uterine artery ligation on d 18 of gestation. On d 22 (term = 23 d), four dams were subjected to normoxia and four to hypoxia

Serotonin uptake by bovine pulmonary artery endothelial cells in culture. II. Stimulation by hypoxia.

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Exposure of bovine pulmonary artery endothelial cells to 3% O2 resulted in approximately twofold stimulation of serotonin (5-HT) uptake after 24-48 h when compared with cells exposed to 20% O2. The enhanced uptake was reversed after 48 h when cells were again placed in 20% O2. The stimulation was

Effect of anoxia on striatal monoamine metabolism in immature rat brain compared with that of hypoxia: an in vivo microdialysis study.

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We examined in 5-day-old rats the effects of either anoxia or 8% hypoxia on extracellular monoamines such as dopamine (DA), 3,4-dihydroxyphenylacetic acid (DOPAC), homovanillic acid (HVA), norepinephrine (NE), 5-hydroxytryptamine (5-HT), and 5-hydroxyindole-3-acetic acid (5-HIAA) using in vivo

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