Abstract:
:Interleukin (IL)-6, a multifunctional cytokine, is widely used as an index for illnesses such as inflammatory and autoimmune disorders, coronary artery disease, neurological disease, and gestational problems. It is thus very important to be able to precisely quantify the level of IL-6 for disease diagnosis and any subsequent therapy. Surface plasmon resonance (SPR) biosensors are sensitive in detecting the interaction between biomolecules by sensing the changes in the refractive index on the sensor chip. This study investigated the SPR technique to determine the IL-6 secretion of human fibroblast MRC5-CVI cells induced by lipopolysaccharide (LPS). To reduce non-specific binding, a mixed self-assembled monolayer of mercaptoundecanoic acid (MUA) and mercaptohexanol (MCH) was attached to the sensor, and then used for IL-6 determination using a sandwich type immunoassay. In addition, two antibody immobilization methods were applied to the sensor surface-direct immobilization and indirect immobilization via protein G affinity. The results demonstrated that the direct immobilization method had a better antibody binding capacity on the sensor surface. The level of cellular IL-6 secretion detected by the SPR biosensor showed a consistent correlation with the commercial kit of IL-6 enzyme-linked immunosorbent assay.
journal_name
Cytokinejournal_title
Cytokineauthors
Chou TH,Chuang CY,Wu CMdoi
10.1016/j.cyto.2010.04.004subject
Has Abstractpub_date
2010-07-01 00:00:00pages
107-11issue
1eissn
1043-4666issn
1096-0023pii
S1043-4666(10)00099-2journal_volume
51pub_type
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