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9 Sonuçlar
Pharmacokinetics of EF5 [2-(2-nitro-1-H-imidazol-1-yl)-N-(2,2,3,3,3-pentafluoropropyl) acetamide] in human patients: implications for hypoxia measurements in vivo by 2-nitroimidazoles.
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OBJECTIVE
Pharmacokinetic studies were performed on the first 28 patients enrolled in a phase I trial to determine the ability of EF5 [2-(2-nitro-1-H-imidazolI-yl)-N-(2,2,3,3,3-pentafluoropropyl) acetamide] to detect hypoxia in human tumors in the absence of patient toxicity.
METHODS
EF5 was made in
In vivo evaluation of [18F]fluoroetanidazole as a new marker for imaging tumour hypoxia with positron emission tomography.
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Development of hypoxia-targeted therapies has stimulated the search for clinically applicable noninvasive markers of tumour hypoxia. Here, we describe the validation of [(18)F]fluoroetanidazole ([(18)F]FETA) as a tumour hypoxia marker by positron emission tomography (PET). Cellular transport and
Preclinical development and current status of the fluorinated 2-nitroimidazole hypoxia probe N-(2-hydroxy-3,3,3-trifluoropropyl)-2-(2-nitro-1-imidazolyl) acetamide (SR 4554, CRC 94/17): a non-invasive diagnostic probe for the measurement of tumor hypoxia by magnetic resonance spectroscopy and imaging, and by positron emission tomography.
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Hypoxia occurs to a variable extent in a vast majority of rodent and human solid tumors. It results from an inadequate and disorganized tumor vasculature, and hence an impaired oxygen delivery. A probe for the non-invasive detection of tumor hypoxia could find important utility in the selection of
Synthesis and characterization of lipophilic 1-[18F]fluoroalkyl-2-nitroimidazoles for imaging hypoxia.
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In order to develop new imaging markers for brain hypoxia, two lipophilic nitroimidazoles, 1-(3-fluoropropyl)-2-nitroimidazole (FPN) and 1-(8-fluorooctyl)-2-nitroimidazole (FON) were synthesized and labeled with fluorine-18. The octanol/water partition coefficients were measured as an indication of
Targeting hypoxia in tumors using 2-nitroimidazoles with peptidic chelators for technetium-99m: effect of lipophilicity.
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Tumor hypoxia is an important prognostic factor for response to therapy. Radiolabeled 2-nitroimidazoles have been used for imaging hypoxia, and the octanol/water partition coefficient (P) of these compounds appears to play a crucial role in their suitability for imaging. A series of 11
The preparation and biological characterization of a new HL91-derivative for hypoxic imaging on stroke mice.
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OBJECTIVE
(99m)Tc-HL91 (Prognox, GE-Healthcare) was the first nonnitro-aryl-based radiotracer for evaluating hypoxic fraction in neoplasm, stroke and myocardium infarction regions. However, the high hydrophilicity of (99m)Tc-HL91 might hamper its penetration into cells. In this study, we prepared a
Actual survey on TLm (median tolerance limit) values of environmental pollutants, especially on amines, nitriles, aromatic nitrogen compounds and artificial dyes.
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Forty-four kinds of organic nitrogen compounds as well as 37 kinds of dyes which contained nitrogen were subjected to TLm test by use of Himedaka (Oryzias latipes) and the results were compared with their partition coefficients between n-octanol and water. Concerning organic nitrogen compounds, such
9-[3-(2-Nitro-1-imidazolyl)propylamino]-1,2,3,4-tetrahydroacridine hydrochloride. A novel DNA-affinic hypoxic cell cytotoxin and radiosensitizer. Comparison with NLA-1.
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Electron-affinic compounds with strong DNA intercalating properties have demonstrated less than the expected radiosensitization due to restriction of their mobility along the DNA backbone and their lower extravascular diffusion in tumors. A 2-nitroimidazole linked 1,2,3,4-tetrahydroacridine
The effects of general anesthetics on P2X7 and P2Y receptors in a rat microglial cell line.
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BACKGROUND
Microglial cells play important roles in coordinating the inflammatory brain responses to hypoxia and trauma. Ionotropic P2X receptors and metabotropic P2Y receptors (P2YRs) expressed in microglia can be activated by extracellular adenosine triphosphate (ATP) derived from damaged cells or
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