Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 239, Issue -, Pages 235-242Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.08.018
Keywords
Isothermal amplification; Lab-on-a-Disc(LoaD); tmRNA; IR heating; Fluorescence detection
Funding
- Science Foundation Ireland, Biomedical Diagnostics Institute Centre for Science Excellence and Technology [10/CE/B1821]
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We present a centrifugal microfluidic Lab-on-a-Disc (LoaD) system capable of implementing nucleic acid in vitro amplification using non-contact heating and fluorescence detection. The system functionality is verified by implementing a Nucleic Acid Sequence Based Amplification (NASBA) reaction, targeting the tmRNA transcript of Haemophilus influenzae. The NASBA assay incorporates fluorescent molecular beacon probes reporting target tmRNA amplification for endpoint detection. The system implements non contact IR heating to heat the NASBA reaction to the required target temperatures during denaturation and amplification steps. The LoaD control system facilitates spin speed and chamber positioning for heating and fluorescence detection. The LoaD alignment system uses magnetic fields to locate and lock the chamber in the required position (heating or detection). The NASBA assay was implemented on the system using Haemophilus influenzae tmRNA over the range 10(2)-10(4) cell equivalent (CE) units. For comparison, identical qNASBA assays were implemented on a Roche LightCycler 2.0 over this concentration range. (C) 2016 Elsevier B.V. All rights reserved.
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