Sensitive identification of prostate ‐specific antigen by iron oxide nanoparticle antibody conjugates on the gap‐finger electrode surface
Identification of prostate specific antigen by iron oxide nanoparticle antibody conjugates. AbstractResearches have proved that increasing level of prostate ‐specific antigen (PSA) is an indicator for the progression of prostate cancer. The present study was focused to determine the PSA level by using anti‐PSA antibody conjugated iron oxide nanoparticles, as the probe immobilized on the gap‐fingered electrode sensing surface. The detection limit a nd sensitivity were found at the level of 1.9 pg/mL on the linear regression curve (y = 1.6939x− 0.5671;R² = 0.9878). A dose‐dependent liner range was found from 1.9 until 60 pg/mL. Further, PSA was spiked in human serum and did not affect the interaction of PSA and its antibody. This method of detection quantifies the level of PSA, which helps to diagnose prostate cancer at its earlier stage.
Source: Biotechnology and Applied Biochemistry - Category: Biochemistry Authors: Wei Zhang,
Kai Li,
Jingyang Guo,
Tao Ma,
Dongqing Wang,
Sumei Shi,
Subash C. B. Gopinath,
Deqiang Gu Tags: Original Article Source Type: research
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