水溶性硼酸亲和富集材料的制备及基于酶联免疫吸附法检测人肝微粒体糖蛋白的应用

Synthesis of Boronic Acid-functionalized Soluble Dendrimers and Its Application in Detection of Human Liver Microsomal Glycoprotein Based on Enzyme-linked Immunosorbent Assay

生物样品中的糖蛋白丰度低,且在检测中易受到其它非糖蛋白的抑制和干扰,需在分析检测前对糖蛋白进行富集,但常规的基于固相材料的糖蛋白富集方法不易与生物技术中最经典的酶联免疫吸附法(ELISA)兼容。本研究以树枝状聚合物PAMAM 4.0为载体,结合硼酸亲和技术,制备了新型水溶性硼酸亲和富集材料(DBC),并将其应用于基于ELISA的人肝微粒体中糖蛋白的检测。采用标准糖蛋白对DBC富集条件进行优化,然后考察其灵敏度和抗干扰能力,将优化后的方法应用于复杂样品人肝微粒体糖蛋白富集。结果表明,DBC对糖蛋白的富集选择性可高达100000倍,可将糖蛋白的富集信号提高100倍。以DBC为富集材料,与ELISA分析技术相结合,只需一步简单的孵育,即可实现生物样品中糖蛋白的高灵敏度、高选择性检测,为疾病相关的糖蛋白组学研究提供了一种有效的检测手段。

The glycoproteins in the biological sample are low abundance and are susceptible to be inhibited and interfered by other non-glycoproteins. An enrichment step is usually required before the glycoprotein analysis,but the operation steps of conventional solid-phase-based glycoprotein enrichment methods are difficult to be compatible with the most classical enzyme-linked immune sorbent assay（ ELISA） technique. In this study,a novel water-soluble dendrimer based boronic acid capture（ DBC） material was developed using PAMAM 4. 0 as the carrier and boronic acid as the affinity group. The method was applied to the detection of glycoproteins in human liver microsomes using ELISA. In this study,the DBC enrichment conditions were optimized by model glycoprotein,and then its sensitivity and anti-interference ability were investigated. This method was applied to the enrichment of glycoproteinsin human liver microsomal. The results showed that the enrichment selectivity of DBC for glycoprotein could be up to 100000 folds,and the enrichment signal of glycoprotein could be increased by 100 times. Therefore,the ELISA method using DBC as a novel enrichment material for glycoprotein had high sensitivity and selectivity in detection of biological samples with only one simple incubation step,which was useful for glycoproteins researches.