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Iyer JK, Otvos RA, Kool J, Kini RM. Microfluidic Chip–Based Online Screening Coupled to Mass Spectrometry. ACTA ACUST UNITED AC 2015; 21:212-20. [DOI: 10.1177/1087057115602648] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 08/04/2015] [Indexed: 11/17/2022]
Abstract
Thrombin and factor Xa (FXa) are critical enzymes of the blood coagulation cascade and are excellent targets of anticoagulant agents. Natural sources present an array of anticoagulants that can be developed as antithrombotic drugs. High-resolution, online screening techniques have been developed for the identification of drug leads from complex mixtures. In this study, we have developed and optimized a microfluidic online screening technique coupled to nano–liquid chromatography (LC) and in parallel with a mass spectrometer for the identification of thrombin and FXa inhibitors in mixtures. Inhibitors eluting from the nano-LC were split postcolumn in a 1:1 ratio; half was fed into a mass spectrometer (where its mass is detected), and the other half was fed into a microfluidic chip (which acts as a microreactor for the online assays). With our platform, thrombin and FXa inhibitors were detected in the assay in parallel with their mass identification. These methods are suitable for the identification of inhibitors from sample amounts as low as sub-microliter volumes.
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Affiliation(s)
| | - Reka A. Otvos
- AIMMS Division of BioAnalytical Chemistry, Faculty of Sciences, VU University Amsterdam, Amsterdam, Netherlands
| | - Jeroen Kool
- AIMMS Division of BioAnalytical Chemistry, Faculty of Sciences, VU University Amsterdam, Amsterdam, Netherlands
| | - R. Manjunatha Kini
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore
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Giera M, Heus F, Janssen L, Kool J, Lingeman H, Irth H. Microfractionation Revisited: A 1536 Well High Resolution Screening Assay. Anal Chem 2009; 81:5460-6. [DOI: 10.1021/ac900622b] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Martin Giera
- Biomolecular Analysis group, Department of Chemistry, Faculty of Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Ferry Heus
- Biomolecular Analysis group, Department of Chemistry, Faculty of Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Laura Janssen
- Biomolecular Analysis group, Department of Chemistry, Faculty of Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Jeroen Kool
- Biomolecular Analysis group, Department of Chemistry, Faculty of Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Henk Lingeman
- Biomolecular Analysis group, Department of Chemistry, Faculty of Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
| | - Hubertus Irth
- Biomolecular Analysis group, Department of Chemistry, Faculty of Sciences, VU University Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
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