CLIN CHEM LAB MED:高分子维生素B12:被低估的威胁

2020-03-21 MedSci原创 MedSci原创

对于避免潜在的错误临床决策,正确识别高分子B12干扰(高分子形态)至关重要。我们的目的是确定免疫检测是否受到高分子B12存在的影响,并验证聚乙二醇(PEG)沉淀程序来检测它。

对于避免潜在的错误临床决策,正确识别高分子B12干扰(高分子形态)至关重要。我们的目的是确定免疫检测是否受到高分子B12存在的影响,并验证聚乙二醇(PEG)沉淀程序来检测它。

研究人员分析了62份来自健康志愿者的血清样本,以确定PEG沉淀后的回收率和参考区间(RIs)。此后,随机选择50个B12水平极高的血清样本(>1476 pmol/L),以分析高分子B12的干扰。在Cobas®免疫分析中分析从健康志愿者和相关聚乙二醇aliquots中提取的血清样本。使用Cobas®和Architect®免疫分析患者样本。最后,对怀疑含有高分子B12的样本进行大小排除色谱(SEC)分析,以确认高分子B12的存在。

研究结果显示,在健康志愿者中,在Cobas8000®上测定的回收率和PEG后RI分别为68.3%至108.4%和122.1至514.4 pmol / L。 使用恢复标准时,发现15个样本(占30%)显示出Macro-B12,而使用后PEG RI时则发现了9个样本(占18%)。 在Architecti2000®上进行的其他免疫测定也受到macro-B12的影响。 Size-exclusion色谱研究证实了高分子B12(免疫球蛋白-B12复合物)的存在。

研究结果表明,B12高浓度样本中高分子B12的流行病率很高。我们建议在B12水平升高的样本中采用PEG沉淀法系统地筛选高分子B12,以避免潜在的误诊或有害的临床后果。

原始出处:

Reza Soleimani,Julien Favresse,Macro vitamin B12: an underestimated threat

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    2020-03-23 马龙
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