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Clinical Application of Surface Plasmon Resonance-Based Biosensors for Fetal Fibronectin Detection

机译:基于表面等离子共振的生物传感器在胎儿纤连蛋白检测中的临床应用

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摘要

Preterm birth is the leading cause of perinatal morbidity and mortality. Fetal fibronectin (fFN), a glycoprotein in the extracellular matrix of the amniotic membranes, is the most powerful biomarker for predicting the risk of preterm birth. Biosensors using the surface plasmon resonance (SPR) response are potentially useful in quantitatively measuring molecules. We established a standard calibration curve of SPR intensity against fFN concentration and used the SPR-based biosensor to detect fFN concentrations in the cervicovaginal secretions of pregnant women between 22 and 34 weeks of gestation. The calibration curve extends from 0.5 ng/mL to 100 ng/mL with an excellent correlation (R2 = 0.985) based on standard fFN samples. A cutoff value of 50 ng/mL fFN concentration in commercial ELISA kits corresponds to a relative intensity of 17 arbitrary units (a.u.) in SPR. Thirty-two pregnant women were analyzed in our study. In 11 women, the SPR relative intensity was greater than or equal to 17 a.u., and in 21 women, the SPR relative intensity was less than 17 a.u. There were significant differences between the two groups in regular uterine contractions (p = 0.040), hospitalization for tocolysis (p = 0.049), and delivery weeks (p = 0.043). Our prospective study concluded that SPR-based biosensors can quantitatively measure fFN concentrations. These results reveal the potential utility of SPR-based biosensors in predicting the risk of preterm birth.
机译:早产是围产期发病率和死亡率的主要原因。胎儿纤连蛋白(fFN)是羊膜细胞外基质中的一种糖蛋白,是预测早产风险的最有力的生物标记。使用表面等离振子共振(SPR)反应的生物传感器可能在定量测量分子方面很有用。我们建立了SPR强度相对于fFN浓度的标准校准曲线,并使用基于SPR的生物传感器检测了妊娠22至34周之间孕妇宫颈阴道分泌物中的fFN浓度。基于标准fFN样品,校正曲线从0.5 ng / mL延伸至100 ng / mL,具有极好的相关性(R 2 = 0.985)。商业ELISA试剂盒中fFN浓度的临界值为50 ng / mL,对应于SPR中17个任意单位(a.u.)的相对强度。在我们的研究中分析了32名孕妇。在11位女性中,SPR相对强度大于或等于17 a.u .;在21位女性中,SPR相对强度小于17 a.u.。两组之间的规律性子宫收缩(p = 0.040),宫缩术住院(p = 0.049)和分娩周(p = 0.043)有显着差异。我们的前瞻性研究得出结论,基于SPR的生物传感器可以定量测量fFN浓度。这些结果揭示了基于SPR的生物传感器在预测早产风险中的潜在实用性。

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