JCEM:干血点采样技术检测甲状腺球蛋白,可作为孕期碘营养状况的标志物

2016-10-17 MedSci MedSci原创

甲状腺球蛋白(Tg)可能是孕妇(PW)在孕期,关于碘营养状况的敏感生物标志物。 我们的目的是:1)建立干血点采样(DBS)技术检测Tg时的碘充足PW的参考范围;2)对一些列不同碘摄入量PW进行参考范围测试;3)确定是否有联合Tg抗体(Ab)测量人群碘营养状况的必要。 本项标准横断面研究,纳入了来自11个国家的3870例PW,碘摄入量从缺乏到足够多。为了定义DBS-Tg参考范围,我们纳入

甲状腺球蛋白(Tg)可能是孕期孕妇(PW)的碘营养状况的敏感生物标志物。

我们的目的是:1)建立干血点采样(DBS)技术检测Tg时的碘充足PW的参考范围;2)对一些列不同碘摄入量PW进行参考范围测试;3)确定是否有联合Tg抗体(Ab)测量人群碘营养状况的必要。

本项标准横断面研究,纳入了来自11个国家的3870例PW,碘摄入量从缺乏到足够多。为了定义DBS-Tg参考范围,我们纳入了甲状腺机能正常的、TgAb阴性PW(n=599),来自3个碘摄入量充足的国家。

主要测量值为尿碘浓度(UIC)和DBS TSH、总T4、Tg和TgAb。

数据显示,在参考PW人群中,中位数DBS-Tg (95%CI)值为9.2 (8.7-9.8) μg/L;不同妊娠期之间没有差异;参考范围为0.3-43.5 μg/L。

Tg浓度与一系列碘摄入量呈U形关系;碘缺乏PW与碘足够PW相比,中位Tg值更高(P<.001);碘缺乏PW或超过适宜摄入量PW的Tg升高的比例更高(P<.05)。在国家内,中位数DBS-Tg和DBS-Tg的升高,在所有PW中没有差异,在TgAb阴性PW中也没有差异。

结果表明,DBS-Tg是PW孕期碘营养状况的敏感生物标志物。根据我们的测量,中位数DBS-Tg ≈10 μg/L时,且低于3%的值≥44μg/L,表明人群碘营养充足。评估人群碘营养状况时,没有必要去测量TgAb。

原始出处:

Stinca S.et al.Dried blood spot thyroglobulin as a biomarker of iodine status in pregnant women.J Clin Endocrinol Metab. 2016 Oct 12:jc20162829. [Epub ahead of print]

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    2017-05-11 achengzhao
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    2017-05-14 xzw113
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    2017-01-11 smallant2015
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