Direct Detection of Uranyl in Urine by Dissociation from Aptamer-Modified Nanosensor Arrays
| Autor: | Marina Zverzhinetsky, Nimrod Harpak, Fernando Patolsky, Larisa Burstein, Offer Zeiri, Vadim Krivitsky, Ella Borberg, Reut Meir |
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| Rok vydání: | 2020 |
| Předmět: |
Silicon
Transistors Electronic Aptamer Population chemistry.chemical_element Biosensing Techniques Urine 010402 general chemistry 01 natural sciences Analytical Chemistry chemistry.chemical_compound Lab-On-A-Chip Devices Depleted uranium Humans Dimethylpolysiloxanes education Detection limit education.field_of_study Chromatography Nanowires Chemistry 010401 analytical chemistry technology industry and agriculture Aptamers Nucleotide Uranium Uranyl 0104 chemical sciences Biosensor |
| Zdroj: | Analytical Chemistry. 92:12528-12537 |
| ISSN: | 1520-6882 0003-2700 |
| Popis: | An ever-growing demand for uranium in various industries raises concern for human health of both occupationally exposed personnel and the general population. Toxicological effects related to uranium (natural, enriched, or depleted uranium) intake involve renal, pulmonary, neurological, skeletal, and hepatic damage. Absorbed uranium is filtered by the kidneys and excreted in the urine, thus making uranium detection in urine a primary indication for exposure and body burden assessment. Therefore, the detection of uranium contamination in bio-samples (urine, blood, saliva, etc.,) is of crucial importance in the field of occupational exposure and human health-related applications, as well as in nuclear forensics. However, the direct determination of uranium in bio-samples is challenging because of "ultra-low" concentrations of uranium, inherent matrix complexity, and sample diversity, which pose a great analytical challenge to existing detection methods. Here, we report on the direct, real-time, sensitive, and selective detection of uranyl ions in unprocessed and undiluted urine samples using a uranyl-binding aptamer-modified silicon nanowire-based field-effect transistor (SiNW-FET) biosensor, with a detection limit in the picomolar concentration range. The aptamer-modified SiNW-FET presented in this work enables the simple and sensitive detection of uranyl in urine samples. The experimental approach has a straight-forward implementation to other metals and toxic elements, given the availability of target-specific aptamers. Combining the high surface-to-volume ratio of SiNWs, the high affinity and selectivity of the uranyl-binding aptamer, and the distinctive sensing methodology gives rise to a practical platform, offering simple and straightforward sensing of uranyl levels in urine, suitable for field deployment and point-of-care applications. |
| Databáze: | OpenAIRE |
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