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Cortisol is a steroidal hormone and an important stress marker. Free serum cortisol concentration has been identified to correlate well with free salivary cortisol. In this present work an electrochemical immunosensor was developed to determine cortisol concentration within the physiological concentration range found in human saliva. The immunosensor is based on a direct competitive enzyme linked...
Prostate cancer (PCa) is a leading cause of cancer-related death among males globally. To date, prostate-specific antigen (PSA), as a typical tumour marker, has been widely used in the early diagnosis of PCa. However, in practical clinical tests, high serum levels of PSA show a high probability for false-positive results, leading to misdiagnoses. In this study, we developed a new classification system...
Accurate and quantitative analysis of breast cancer biomarkers is a particularly requisite in the early diagnosis of breast cancers, especially in real samples. Here, we develop a surface enhanced Raman scattering (SERS) immunoassay biosensor based on a microfluidic chip for the simultaneous detection of multiple breast cancer biomarkers in real samples. In such an immunoassay, immuno-Ag aggregates...
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