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Gavrilović I, Musenga A, Cowan D, Woffendin A, Smart A, Gong F, Harding D, Wolff K. Artificial oral fluid characterisation: Potential for use as a reference matrix in drug testing. Drug Test Anal 2020; 13:709-719. [PMID: 33025712 DOI: 10.1002/dta.2938] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 09/22/2020] [Accepted: 09/24/2020] [Indexed: 12/29/2022]
Abstract
Quality assurance schemes for drug-screening programmes require access to large quantities of biological matrices for reference or control samples. This presents problems when the availability of a matrix, such as oral fluid (OF) for screening or for confirmatory purposes, limits the collection of large volumes. In such cases, synthetic alternatives of OF may provide a solution. The preparation of an artificial (synthetic) oral fluid (AOF) was conducted by dissolving its components (salts, surfactant, antimicrobial agent and mucin) in water. We characterised the physical properties of AOF to determine its suitability as a matrix for quality assurance purposes. The evaluation of pH, specific gravity (SG), conductivity (mS cm-1 ), freezing point depression (°C), light-scattering and kinematic viscosity (mm2 s-1 ) showed AOF to be a stable, reliable matrix. Synthetic OF was prepared using components (mucin, surfactants and so on) obtained from different suppliers and a comparison was performed. Our results suggest that AOF is a feasible matrix for the preparation of quality assurance samples for confirmatory or drug screening programmes.
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Affiliation(s)
- Ivana Gavrilović
- Drug Control Centre, King's Forensics, King's College London, London, UK
| | - Alessandro Musenga
- Drug Control Centre, King's Forensics, King's College London, London, UK.,Laboratoire Suisse d'Analyse du Dopage, Centre Hospitalier Universitaire Vaudois et Université de Lausanne, Lausanne, Switzerland
| | - David Cowan
- Drug Control Centre, King's Forensics, King's College London, London, UK.,Department of Analytical, Environmental and Forensic Sciences, King's College London, London, UK
| | - Alison Woffendin
- Drug Control Centre, King's Forensics, King's College London, London, UK
| | - Andrew Smart
- Drug Control Centre, King's Forensics, King's College London, London, UK
| | - Fan Gong
- Home Office, Centre for Applied Science and Technology (CAST), London, UK
| | - Duncan Harding
- Home Office, Centre for Applied Science and Technology (CAST), London, UK
| | - Kim Wolff
- Drug Control Centre, King's Forensics, King's College London, London, UK.,Department of Analytical, Environmental and Forensic Sciences, King's College London, London, UK
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Li Y, Uddayasankar U, He B, Wang P, Qin L. Fast, Sensitive, and Quantitative Point-of-Care Platform for the Assessment of Drugs of Abuse in Urine, Serum, and Whole Blood. Anal Chem 2017; 89:8273-8281. [PMID: 28700829 PMCID: PMC6398168 DOI: 10.1021/acs.analchem.7b01288] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Drug abuse is a major public health problem in many countries in Europe and North America. Currently available platforms for drug abuse assessment are facing technical challenges of nonquantitation, inaccuracy, low throughput, incompatibility with diverse complex specimens, long assay times, and requirement of instrument and/or expertise for readout. Here, we report an integrated competitive volumetric-bar-chart chip (CV-Chip) to assay multiple drug targets at the point-of-care (POC). To the best of our knowledge, it is the first time that a POC platform has been demonstrated to fully address the above-mentioned limitations. We applied this integrated CV-chip platform to assay multiple drugs in 38 patient urine and serum samples and validated the on-chip results with an LC-MS/MS method, indicating a clinical sensitivity and specificity of 0.94 and 1.00, respectively. We further demonstrated that the combination of an on-chip blood separator with the CV-Chip enabled the platform to directly assay finger-prick whole blood samples, which have always been recognized as an ideal biospecimen for POC detections. In summary, this integrated CV-Chip is able to serve as a sensitive, accurate, fast, portable, readout visible, and minimally invasive platform for drug abuse assessment.
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Affiliation(s)
- Ying Li
- Department of Nanomedicine, Houston Methodist Research Institute, 6670 Bertner Ave, Houston, TX 77030, USA
- Department of Cell and Developmental Biology, Weill Medical College of Cornell University, New York, NY 10065, USA
| | - Uvaraj Uddayasankar
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, 6670 Bertner Ave, Houston, TX 77030, USA
| | - Bangshun He
- Department of Nanomedicine, Houston Methodist Research Institute, 6670 Bertner Ave, Houston, TX 77030, USA
- Department of Cell and Developmental Biology, Weill Medical College of Cornell University, New York, NY 10065, USA
- Central Laboratory, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
| | - Ping Wang
- Department of Pathology and Genomic Medicine, Houston Methodist Hospital, 6670 Bertner Ave, Houston, TX 77030, USA
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, 3400 Spruce St, Philadelphia, PA 19104, USA
| | - Lidong Qin
- Department of Nanomedicine, Houston Methodist Research Institute, 6670 Bertner Ave, Houston, TX 77030, USA
- Department of Cell and Developmental Biology, Weill Medical College of Cornell University, New York, NY 10065, USA
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