An ELISA Assay for Quantifying Monomeric C-Reactive Protein in Plasma.

An ELISA Assay for Quantifying Monomeric C-Reactive Protein in Plasma.
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用于定量血浆中单体 C 反应蛋白的 ELISA 测定

DOI:
10.3389/fimmu.2018.00511
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发表时间:
2018
影响因子:
7.3
通讯作者:
Wu Y
Wu Y
中科院分区:
医学2区
文献类型:
--
作者:
Zhang L;Li HY;Li W;Shen ZY;Wang YD;Ji SR;Wu Y

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天然C反应蛋白(nCRP)是一种炎症的非特异性标志物,在多种慢性疾病中被认为是旁观者。越来越多的证据表明,nCRP会解离,主要以单体构象(mCRP)在炎症部位发挥作用。这表明mCRP可能是一种更优的疾病标志物,对潜在发病机制具有更高的特异性和明确的因果关系。然而,由于缺乏一种可行的检测方法来量化临床样本中的mCRP,无法对这一观点进行评估。在此我们报道了一种利用市售试剂定量检测血浆mCRP的夹心酶联免疫吸附测定(ELISA)方法的开发。我们的检测方法具有可重复性且高度构象特异性,可靠的检测限为1纳克/毫升。我们进一步表明,在几种皮肤相关的自身免疫性疾病中,mCRP似乎是比nCRP更好的标志物。因此,该检测方法为检验mCRP的临床意义和实用性提供了一种有用的工具。
Native C-reactive protein (nCRP) is a non-specific marker of inflammation being claimed as a bystander in several chronic disorders. Accumulating evidence indicates that nCRP dissociates to and acts primarily as the monomeric conformation (mCRP) at inflammatory loci. This suggests that mCRP may be a superior disease marker with improved specificity and clear causality to the underlying pathogenesis. However, the lack of a feasible assay to quantify mCRP in clinical samples precludes the assessment of that suggestion. Here we report the development of a sandwich ELISA assay for quantification of plasma mCRP using commercially available reagents. Our assay is reproducible and highly conformation-specific showing a reliable detection limit of 1 ng/mL. We further show that mCRP appears to be a better marker than nCRP in several skin-related autoimmune disorders. This assay thus provides a useful tool to examine the clinical significance and utility of mCRP.
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