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Establishing albumin levels in sheep serum by a specific fluoroimmunoassay

机译:通过特定的荧光免疫分析法确定绵羊血清中的白蛋白水平

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A rapid and sensitive fluoroimmunoassay (FIA) was developed to measure albumin levels in sheep serum. The assay employed ovine albumin labelled with fluorescein as the tracer and a rabbit antiserum raised against sheep albumin. Separation of antibody-bound from free albumin was achieved using a second antiserum directed against the Fc component of rabbit IgG. Assay procedures were simplified by mixing the two antisera prior to use. Satisfactory assay validation parameters were demonstrated and the reagents were stable for at least 1 year at 4 degrees C. In contrast to the bromocresol green dye binding method, the accuracy of the FIA was unaffected by contaminating immunoglobulins. The FIA was used to establish reference ranges for serum albumin levels in lambs, in normal ewes and in ewes undergoing a prolonged course of immunisation. Mean serum albumin levels for these three groups were 38.8, 51.3 and 37.8 g L-1 respectively. The sensitivity of the assay makes it suitable to monitor albumin levels in therapeutic products derived from sheep blood or serum.
机译:开发了一种快速灵敏的荧光免疫测定法(FIA)以测量绵羊血清中的白蛋白水平。该测定采用标记有荧光素的绵羊白蛋白作为示踪剂,以及针对绵羊白蛋白的兔抗血清。使用针对兔IgG Fc成分的第二种抗血清,可将与游离白蛋白结合的抗体分离出来。通过在使用前混合两种抗血清,简化了测定程序。令人满意的分析验证参数得到证实,并且试剂在4摄氏度下稳定至少1年。与溴甲酚绿色染料结合方法相比,FIA的准确性不受污染的免疫球蛋白的影响。 FIA用于确定羔羊,正常母羊和经过长时间免疫的母羊的血清白蛋白水平参考范围。这三组的平均血清白蛋白水平分别为38.8、51.3和37.8 g L-1。该测定法的灵敏度使其适合监测源自绵羊血液或血清的治疗产品中的白蛋白水平。

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