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Talanta. 2018 Oct 1;188:516-521. doi: 10.1016/j.talanta.2018.06.014. Epub 2018 Jun 7.

Transverse diffusion of laminar flow profiles as a generic capillary electrophoresis method for in-line nanoreactor mixing: Application to the investigation of antithrombotic activity.

Author information

1
Laboratory for the Analysis of Medicines (LAM), Department of Pharmacy, CIRM, University of Liege, Belgium.
2
Namur Medicine & Drug Innovation Center (NAMEDIC - NARILIS), University of Namur, Belgium.
3
Laboratory for the Analysis of Medicines (LAM), Department of Pharmacy, CIRM, University of Liege, Belgium. Electronic address: Marianne.fillet@ulg.ac.be.

Abstract

Capillary electrophoresis (CE) instrument was used for the generation of a robust and reliable nanoreactor for enzymatic assays in the context of antithrombotic drug screening. The activity of the screened molecules was monitored in a quick and fully automated fashion using only few nanoliters of reactants. To achieve this goal, the targeted enzyme (thrombin) and the chromogenic substrate with or without the screened inhibitor were injected as separate plugs. The mixing of the reactants was then realized using electrophoretically mediated microanalysis (EMMA) or fast transverse diffusion of laminar flow profiles (TDLFP) procedure. The latest provided better mixing performance and was chosen to investigate the inhibitory potency of a fragment library. This very straightforward and fast CE activity assay showed results in good accordance with a previously developed CE affinity assay that confirms the potential of CE at the early stages of drug discovery, providing not only an efficient nanoscale bioreactor but also a selective and integrated separation device.

KEYWORDS:

Activity assay; Capillary electrophoresis; Nanoreactor; TDLFP; Thrombin

PMID:
30029407
DOI:
10.1016/j.talanta.2018.06.014
[Indexed for MEDLINE]

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