In a previous experiment,male Ross 308 broiler chickens were offered dietary treatments with 3 levels of crude protein(222,193,165 g/kg)and 3 feed grains(ground maize,ground wheat,whole wheat)from 7 to 35 d post-hatch...In a previous experiment,male Ross 308 broiler chickens were offered dietary treatments with 3 levels of crude protein(222,193,165 g/kg)and 3 feed grains(ground maize,ground wheat,whole wheat)from 7 to 35 d post-hatch.Maize-based diets supported superior growth performance in comparison to wheatbased diets.Uric acid concentrations in excreta were retrospectively determined and related to total nitrogen(N)excreta concentrations.Uric acid concentrations ranged from 28.5 to 69.4 mg/g and proportions of uric acid-N to total excreta-N ranged from 27.4%to 42.6%in broiler chickens offered the 3×3 factorial array of dietary treatments.Proportions of uric acid-N to total N in excreta in birds offered the165 g/kg CP,maize-based diet were significantly lower by 10.6 percentage units(27.4%versus 38.0%;P=0.00057)than their wheat-based counterparts.Total excreta analysed had been collected from 35 to37 d post-hatch when feed intakes and excreta outputs were monitored.There were linear relationships between proportions of uric acid-N to total N in excreta in birds offered the three 165 g/kg CP diets with weight gain(r=-0.587;P=0.010),feed intake(r=-0.526;P=0.025)and feed conversion ratios(r=0.635;P=0.005).The possibility that increasing uric acid-N proportions in excreta is indicative of excessive ammonia accumulations compromising growth performance is discussed.The mean proportion of dietary glycine involved in uric acid excretion was 49.2%across all dietary treatments but ranged from 25.0%to 80.9%.Thus,the appropriate amount of dietary glycine is variable and largely dependent on the volume of uric acid synthesised and excreted.展开更多
目的探讨H型高血压(HHT)患者血尿酸水平与主动脉顺应性的关系。方法以102例HHT为观察组,106例非HHT高血压患者为对照组,比较两组的病史、血脂、肾功能、肝功能等指标差异,测量肱动脉血压并通过超声心动图测量左室功能与主动脉顺应性,并...目的探讨H型高血压(HHT)患者血尿酸水平与主动脉顺应性的关系。方法以102例HHT为观察组,106例非HHT高血压患者为对照组,比较两组的病史、血脂、肾功能、肝功能等指标差异,测量肱动脉血压并通过超声心动图测量左室功能与主动脉顺应性,并分析各指标相关性。结果观察组高频进食海鲜(>1000 g/d,20 vs 11)、高血压家族史例数(21 vs 10)、尿酸水平(437.28±129.32μmol/L vs 339.58±117.89μmol/L)、同型半胱氨酸水平(19.65±4.82μmol/L vs 10.38±3.19μmol/L)高于对照组(P<0.05)。观察组的左室收缩及舒张末期直径射血分数均小于对照组(P<0.05)。观察组收缩压、主动脉僵硬指数高于对照组,但舒张压、主动脉张力及膨胀指数低于对照组(P<0.05)。相关性分析显示海鲜摄入量及尿酸与主动脉张力及膨胀性指数均呈负相关,而前两者与僵硬指数正相关(P<0.05)。结论 H型高血压患者尿酸水平高于非H型高血压患者,且尿酸及海鲜摄入量与主动脉顺应性下降相关。展开更多
Background Recently, it has been suggested that the serum uric acid （SUA） level decreased in diabetic patients. The aim of this study was to explore the association between SUA level and different state of glucose m...Background Recently, it has been suggested that the serum uric acid （SUA） level decreased in diabetic patients. The aim of this study was to explore the association between SUA level and different state of glucose metabolism and glomerular filtration rate （GFR） reflected by the simplified Modification of Diet in Renal Disease （MDRD） equation and to test the hypothesis that high MDRD is one of the determinants of SUA level.Methods This cross-sectional study included 2373 subjects in Beijing who underwent a 75 g oral glucose tolerance test （OGTT） for screening of diabetes. According to the states of glucose metabolism, they were divided into normal glucose tolerance, impaired glucose regulation and diabetes.Results Multiple stepwise linear regression analysis showed that adjusted by gender, SUA was positively correlated with body mass index （BMI）, waist/hippo ratio, systolic blood pressure （SBP） and triglyceride, meanwhile negatively correlated with age, hemoglobin A1c, fasting insulin and MDRD. There was an increasing trend in SUA concentration and a decreasing trend in MDRD when the levels of fasting plasma glucose （FPG） increased from low to high up to the FPG level of 8.0 mmol/L; thereafter, the SUA concentration started to decrease with further increases in FPG levels, and the MDRD started to increase with further increases in FPG levels.Conclusion This study confirmed the previous finding that SUA decreased in diabetes and provided the supporting evidence that the increased MDRD might contribute to the fall of SUA.展开更多
文摘In a previous experiment,male Ross 308 broiler chickens were offered dietary treatments with 3 levels of crude protein(222,193,165 g/kg)and 3 feed grains(ground maize,ground wheat,whole wheat)from 7 to 35 d post-hatch.Maize-based diets supported superior growth performance in comparison to wheatbased diets.Uric acid concentrations in excreta were retrospectively determined and related to total nitrogen(N)excreta concentrations.Uric acid concentrations ranged from 28.5 to 69.4 mg/g and proportions of uric acid-N to total excreta-N ranged from 27.4%to 42.6%in broiler chickens offered the 3×3 factorial array of dietary treatments.Proportions of uric acid-N to total N in excreta in birds offered the165 g/kg CP,maize-based diet were significantly lower by 10.6 percentage units(27.4%versus 38.0%;P=0.00057)than their wheat-based counterparts.Total excreta analysed had been collected from 35 to37 d post-hatch when feed intakes and excreta outputs were monitored.There were linear relationships between proportions of uric acid-N to total N in excreta in birds offered the three 165 g/kg CP diets with weight gain(r=-0.587;P=0.010),feed intake(r=-0.526;P=0.025)and feed conversion ratios(r=0.635;P=0.005).The possibility that increasing uric acid-N proportions in excreta is indicative of excessive ammonia accumulations compromising growth performance is discussed.The mean proportion of dietary glycine involved in uric acid excretion was 49.2%across all dietary treatments but ranged from 25.0%to 80.9%.Thus,the appropriate amount of dietary glycine is variable and largely dependent on the volume of uric acid synthesised and excreted.
文摘目的探讨H型高血压(HHT)患者血尿酸水平与主动脉顺应性的关系。方法以102例HHT为观察组,106例非HHT高血压患者为对照组,比较两组的病史、血脂、肾功能、肝功能等指标差异,测量肱动脉血压并通过超声心动图测量左室功能与主动脉顺应性,并分析各指标相关性。结果观察组高频进食海鲜(>1000 g/d,20 vs 11)、高血压家族史例数(21 vs 10)、尿酸水平(437.28±129.32μmol/L vs 339.58±117.89μmol/L)、同型半胱氨酸水平(19.65±4.82μmol/L vs 10.38±3.19μmol/L)高于对照组(P<0.05)。观察组的左室收缩及舒张末期直径射血分数均小于对照组(P<0.05)。观察组收缩压、主动脉僵硬指数高于对照组,但舒张压、主动脉张力及膨胀指数低于对照组(P<0.05)。相关性分析显示海鲜摄入量及尿酸与主动脉张力及膨胀性指数均呈负相关,而前两者与僵硬指数正相关(P<0.05)。结论 H型高血压患者尿酸水平高于非H型高血压患者,且尿酸及海鲜摄入量与主动脉顺应性下降相关。
文摘Background Recently, it has been suggested that the serum uric acid （SUA） level decreased in diabetic patients. The aim of this study was to explore the association between SUA level and different state of glucose metabolism and glomerular filtration rate （GFR） reflected by the simplified Modification of Diet in Renal Disease （MDRD） equation and to test the hypothesis that high MDRD is one of the determinants of SUA level.Methods This cross-sectional study included 2373 subjects in Beijing who underwent a 75 g oral glucose tolerance test （OGTT） for screening of diabetes. According to the states of glucose metabolism, they were divided into normal glucose tolerance, impaired glucose regulation and diabetes.Results Multiple stepwise linear regression analysis showed that adjusted by gender, SUA was positively correlated with body mass index （BMI）, waist/hippo ratio, systolic blood pressure （SBP） and triglyceride, meanwhile negatively correlated with age, hemoglobin A1c, fasting insulin and MDRD. There was an increasing trend in SUA concentration and a decreasing trend in MDRD when the levels of fasting plasma glucose （FPG） increased from low to high up to the FPG level of 8.0 mmol/L; thereafter, the SUA concentration started to decrease with further increases in FPG levels, and the MDRD started to increase with further increases in FPG levels.Conclusion This study confirmed the previous finding that SUA decreased in diabetes and provided the supporting evidence that the increased MDRD might contribute to the fall of SUA.
