This study aimed to investigate changes in postmortem urotensin Ⅱ receptor(UTR)levels in brain and kidney tissues in a rat model of cardiac ischemia.The rats were divided into two groups:a control group and a cardiac...This study aimed to investigate changes in postmortem urotensin Ⅱ receptor(UTR)levels in brain and kidney tissues in a rat model of cardiac ischemia.The rats were divided into two groups:a control group and a cardiac ischemia-induced group.Cardiac ischemia was created by an intraperitoneal injection of a single lethal dose of isoproterenol(ISO;850 mg/kg).Plasma UT,blood urea nitrogen,and creatinine levels were determined 0 h postmortem.Brain and kidney UTR mRNA expression levels were determined 0,1,3,6,12,24,4&and 72 h postmortem.The histopathological appearance of brain and kidney tissues was also evaluated.Plasma UT and plasma creatinine levels were increased in the cardiac ischemia-induced group as compared with those in the control group(P<0.001).Ischemia resulted in histopathological changes in brain and cerebellum tissue.The morphological evaluation revealed Purkinje cell degeneration(P=0.037)and dark neurons(P=0.004).The UTR expression level decreased after 1 h postmortem in the brain and after 3 h postmortem in the kidneys in the cardiac ischemia-induced group as compared with that in the control group(P<0.001).The observed changes in UTR expression levels may be valuable in clinical practice in the field of forensic medicine.These changes may be used as a marker in postmortem evaluations of sudden death caused by ischemia-induced cardiac shock.展开更多
基金This study was part of a dissertation titled^Investigation of postmortem UTR and endothelin 1 levels in brain and kidney tissues in rats that died of ISO toxicity,"which was supported by the Ataturk University Scientific Research Project(BAP 2014/036).
文摘This study aimed to investigate changes in postmortem urotensin Ⅱ receptor(UTR)levels in brain and kidney tissues in a rat model of cardiac ischemia.The rats were divided into two groups:a control group and a cardiac ischemia-induced group.Cardiac ischemia was created by an intraperitoneal injection of a single lethal dose of isoproterenol(ISO;850 mg/kg).Plasma UT,blood urea nitrogen,and creatinine levels were determined 0 h postmortem.Brain and kidney UTR mRNA expression levels were determined 0,1,3,6,12,24,4&and 72 h postmortem.The histopathological appearance of brain and kidney tissues was also evaluated.Plasma UT and plasma creatinine levels were increased in the cardiac ischemia-induced group as compared with those in the control group(P<0.001).Ischemia resulted in histopathological changes in brain and cerebellum tissue.The morphological evaluation revealed Purkinje cell degeneration(P=0.037)and dark neurons(P=0.004).The UTR expression level decreased after 1 h postmortem in the brain and after 3 h postmortem in the kidneys in the cardiac ischemia-induced group as compared with that in the control group(P<0.001).The observed changes in UTR expression levels may be valuable in clinical practice in the field of forensic medicine.These changes may be used as a marker in postmortem evaluations of sudden death caused by ischemia-induced cardiac shock.
