High-performance liquid chromatography (HPLC) determination of inosine, a potential biomarker for initial cardiac ischaemia, using isolated mouse hearts
Autor: | Don Farthing, Terri Larus, Domenic D. Sica, Lynne Gehr, Lei Xi, H. T. Karnes |
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Rok vydání: | 2006 |
Předmět: |
Free Radicals
Health Toxicology and Mutagenesis Clinical Biochemistry Myocardial Ischemia Ischemia In Vitro Techniques Chest pain Biochemistry High-performance liquid chromatography Mice chemistry.chemical_compound Trifluoroacetic acid Animals Medicine Inosine Chromatography High Pressure Liquid Mice Inbred ICR Chromatography business.industry Myocardium Body Weight Reproducibility of Results Organ Size medicine.disease chemistry Circulatory system Biomarker (medicine) medicine.symptom business Quantitative analysis (chemistry) Biomarkers medicine.drug |
Zdroj: | Biomarkers. 11:449-459 |
ISSN: | 1366-5804 1354-750X |
Popis: | Each year in the USA approximately 7-8 million patients with non-traumatic chest pain come to hospital emergency rooms. It is estimated that approximately 2-5% of these patients are experiencing cardiac ischaemia, but due to the shortcomings of the available testing methods they are incorrectly diagnosed and discharged without appropriate therapy having been provided. Preliminary data with a globally ischaemic mouse heart model has demonstrated that endogenous inosine might be a potential biomarker of initial cardiac ischaemia before cardiac tissue necrosis. A high-performance liquid chromatographic diode array detection (HPLC-DAD) method was utilized for the detection and quantification of inosine in Krebs-Henseleit (Krebs) buffer solution perfusing from surgically removed and isolated mouse hearts undergoing global cardiac ischaemia. A C18 column at a flow rate of 0.6 ml min-1 with an aqueous mobile phase of trifluoroacetic acid (0.05% trifluoroacetic acid in deionized water, pH 2.2, v/v) and methanol gradient was used for component separation. The assay detection limit for inosine in Krebs buffer solution was 500 ng ml-1 using a 100-microl neat injection. The HPLC results were used to determine total cardiac effluxed inosine into the Krebs effluent for each mouse during oxidative stress and compared with the per cent cardiac ventricular functional recovery rate to determine if a relationship exists amongst this cardiovascular parameter during periods of cardiac oxidative stress. |
Databáze: | OpenAIRE |
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