同位素示踪法测定125I -NGF在小鼠体内的血药浓度变化

姜国华 北京师范大学分析测试中心
黄建华
刘忠敏
摘 要:本文涉及应用Idogn法对神经生长因子(NGF)进行125I标记并利用同位素示踪与电泳分离相结合的方法测定125I -NGF在小鼠体内的血药浓度与时间变化关系。结果显示,静脉注射125I-NGF在小鼠体内的代谢规律符合二房室开放模型。分布相半衰期为0.13h,消除相半衰期为3.68h,125I -NGF在小鼠体内分布和消除均较快,清除率为0.125L/h/Kg,表观分布容积为0.697L/kg,曲线所围面积为16.01μg·h/L。
关键词:神经生长因子,125I标记,同位素示踪法,十二烷基硫酸钠-聚丙烯酰胺凝胶电泳

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Determination of the change of 125I -NGF concentration in plasma in mouse

Abstract:The study concerns in the label of nerve growth factor(NGF)by 125I with Idogn method.The change of 125I -NGF Concentration in Plasma in Mouse with time was determinated using the method of sodium dodecylsilfate-poly-accrylamide gel electrophoresis(SDS PAGE)after iv 125I -NGF.Result demonstrate the time 125I -NGF concentration in plasma curve after iv fit a two compartment open model.Distribution phase half life is 0.13h,elimination phase half life is 3.68h,the mean plasma clearance is 0.125L/(h·Kg),apparent volume of distribution is 0.697L/kg,area under curve is 16.012μg·h/L.
Key words:Nerve growth factor(NGF),Isotope tracing method,SDS
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