Sensitive and non-invasive cholesterol determination in saliva via optimization of enzyme loading and platinum nano-cluster composition
| Autor: | Hye Won Seo, Ji Yoon Kang, Soo Hyun Lee, Yi Jae Lee, Joon S. Shim, Kyu Shik Eom |
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| Rok vydání: | 2020 |
| Předmět: |
Saliva
Hyperlipidemias Ascorbic Acid Biosensing Techniques 02 engineering and technology 01 natural sciences Biochemistry Analytical Chemistry chemistry.chemical_compound Limit of Detection Hyperlipidemia Electrochemistry medicine Humans Environmental Chemistry Spectroscopy Platinum Detection limit Chromatography Cholesterol Oxidase Cholesterol 010401 analytical chemistry Electrochemical Techniques Enzymes Immobilized 021001 nanoscience & nanotechnology medicine.disease Ascorbic acid Nanostructures Uric Acid 0104 chemical sciences Glucose chemistry Linear range Uric acid 0210 nano-technology Biosensor |
| Zdroj: | The Analyst. 145:908-916 |
| ISSN: | 1364-5528 0003-2654 |
| Popis: | An excessive cholesterol level can lead to cardiovascular diseases, such as stroke, hypertension, and myocardial infarction. A non-invasive, painless method of determining the cholesterol level in blood would improve the user's convenience. To provide rapid and accurate determination of cholesterol, we have developed a simple, disposable, enzyme-based electrochemical biosensor that can detect salivary cholesterol. It is possible to detect low concentrations of cholesterol in saliva using the optimized vertical structure of the platinum nano-cluster (Pt-NC) and the immobilization of a proper volume of an enzyme. The biosensor exhibited a linear range from 2 to 486 μM, the limit of detection was about 2 μM, and the sensitivity of the sensor was calculated to be 132 μA mM-1 cm-2. It also showed good specificity for ascorbic acid, uric acid, dopamine, glucose, and lactate. In a test with an actual sample, the performance of the biosensor was confirmed by measuring total cholesterol in the saliva of a patient with hyperlipidemia. The cholesterol levels measured in the saliva of three patients with hyperlipidemia were 520, 460, and 290 μM. Therefore, the Pt-NC based enzyme sensor is a promising candidate for the detection of cholesterol in human saliva. |
| Databáze: | OpenAIRE |
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