Medically relevant assays with a simple smartphone and tablet based fluorescence detection system

Piotr Wargocki, Wei Deng, Ayad G. Anwer, Ewa M. Goldys

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Cell phones and smart phones can be reconfigured as biomedical sensor devices but this requires specialized add-ons. In this paper we present a simple cell phone-based portable bioassay platform, which can be used with fluorescent assays in solution. The system consists of a tablet, a polarizer, a smart phone (camera) and a box that provides dark readout conditions. The assay in a well plate is placed on the tablet screen acting as an excitation source. A polarizer on top of the well plate separates excitation light from assay fluorescence emission enabling assay readout with a smartphone camera. The assay result is obtained by analysing the intensity of image pixels in an appropriate colour channel. With this device we carried out two assays, for collagenase and trypsin using fluorescein as the detected fluorophore. The results of collagenase assay with the lowest measured concentration of 3.75 μg/mL and 0.938 μg in total in the sample were comparable to those obtained by a microplate reader. The lowest measured amount of trypsin was 930 pg, which is comparable to the low detection limit of 400 pg for this assay obtained in a microplate reader. The device is sensitive enough to be used in point-of-care medical diagnostics of clinically relevant conditions, including arthritis, cystic fibrosis and acute pancreatitis.

LanguageEnglish
Pages11653-11664
Number of pages12
JournalSensors (Switzerland)
Volume15
Issue number5
DOIs
Publication statusPublished - 20 May 2015

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tablets
Smartphones
Tablets
trypsin
Assays
Cell Phones
Fluorescence
Collagenases
readers
polarizers
Equipment and Supplies
fluorescence
Trypsin
readout
cystic fibrosis
Point-of-Care Systems
cameras
arthritis
bioassay
cells

Bibliographical note

Copyright 2015 by the authors; licensee MDPI, Basel, Switzerland. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Cite this

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Medically relevant assays with a simple smartphone and tablet based fluorescence detection system. / Wargocki, Piotr; Deng, Wei; Anwer, Ayad G.; Goldys, Ewa M.

In: Sensors (Switzerland), Vol. 15, No. 5, 20.05.2015, p. 11653-11664.

Research output: Contribution to journalArticleResearchpeer-review

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