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Fabrication of gelatin functionalized silver nanoparticles for blood group profiling

机译:明胶官能化银纳米粒子的制备用于血型分析

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We report the fabrication of silver nanoparticles (AgNPs) surface functionalized with gelatin at different concentrations (G10/G20/G40 AgNPs) with an average particle size of similar to 200 nm, bioconjugated with antisera antibodies (AsAbs) of the major and clinically significant blood groups (CSBGs) at different titres from neat to 1:128. Bioconjugation using ionic interaction at pH 7.4 enabled 'end-on' configuration, with the -NH2 group of the antibody free for interaction with the red blood cell antigen, as confirmed by Fourier transform infrared spectroscopy. The tube agglutination test (TAT) revealed optimum agglutination with G20NPs, while SDS PAGE confirmed the optimal titre as 1:8 for the major blood groups A, B, AB and O. Bioconjugated AgNPs coated onto microtitre assay plates with the major blood groups and CSBGs to enable simultaneous identification, were validated against the TAT on 400 random blood samples for the major blood groups and revealed high accuracy (95%). While similar accuracy was seen for most of the CSBGs with only false negatives, the method was not found to be suitable for the Kell, Kidd and Duffy groups. The absence of false positives reflects high safety, and eliminates the risk of a mismatched blood transfusion. The method uses diluted blood and hence could enable point-of-care detection. The significantly lower AsAb requirement also provides a cost advantage.
机译:我们在不同浓度(G10 / G20 / G40 AgNP)上用明胶官能化的银纳米颗粒(AgNP)表面的制备,其平均粒度与200nm的平均粒度相似,生物缀合物与主要和临床显着的血液的抗血清抗体(AAB)进行生物缀合在整齐至1:128的不同滴度的群体(CSBG)。使用pH7.4的离子相互作用的生物谐波使能“结束”构型,用傅里叶变换红外光谱证实,与红细胞抗原的相互作用的-NH2抗体组。管凝集试验(TAT)显示出与G20NPS的最佳凝集,而SDS PAGE确认主要血液组A,B,AB和O.用主要血液组涂覆在微调测定板上的生物血压agnps的最佳滴度为1:8。 CSBGS为了能够同时识别,对主要血液组的400种随机血液样品进行验证,并显示出高精度(95%)。虽然只有类似的CSBG被视为类似的CSBG,但没有发现该方法是适合Kell,Kidd和Duffy群体的方法。没有假阳性反映了高安全性,并消除了失配的输血的风险。该方法使用稀释的血液,因此可以实现护理点检测。显着较低的ASAB要求也提供了成本优势。

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