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Tanniche I, Behkam B. Engineered live bacteria as disease detection and diagnosis tools. J Biol Eng 2023; 17:65. [PMID: 37875910 PMCID: PMC10598922 DOI: 10.1186/s13036-023-00379-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 09/18/2023] [Indexed: 10/26/2023] Open
Abstract
Sensitive and minimally invasive medical diagnostics are essential to the early detection of diseases, monitoring their progression and response to treatment. Engineered bacteria as live sensors are being developed as a new class of biosensors for sensitive, robust, noninvasive, and in situ detection of disease onset at low cost. Akin to microrobotic systems, a combination of simple genetic rules, basic logic gates, and complex synthetic bioengineering principles are used to program bacterial vectors as living machines for detecting biomarkers of diseases, some of which cannot be detected with other sensing technologies. Bacterial whole-cell biosensors (BWCBs) can have wide-ranging functions from detection only, to detection and recording, to closed-loop detection-regulated treatment. In this review article, we first summarize the unique benefits of bacteria as living sensors. We then describe the different bacteria-based diagnosis approaches and provide examples of diagnosing various diseases and disorders. We also discuss the use of bacteria as imaging vectors for disease detection and image-guided surgery. We conclude by highlighting current challenges and opportunities for further exploration toward clinical translation of these bacteria-based systems.
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Affiliation(s)
- Imen Tanniche
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Bahareh Behkam
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, VA, 24061, USA.
- School of Biomedical Engineered and Sciences, Virginia Tech, Blacksburg, VA, 24061, USA.
- Center for Engineered Health, Institute for Critical Technology and Applied Science, Virginia Tech, Blacksburg, VA, 24061, USA.
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Lakshmi Devi A, Resmi PE, Pradeep A, Suneesh PV, Nair BG, Satheesh Babu TG. A paper-based point-of-care testing device for the colourimetric estimation of bilirubin in blood sample. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 287:122045. [PMID: 36327811 DOI: 10.1016/j.saa.2022.122045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 10/09/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
A paper-based colourimetric assay for the Point-of-Care Testing (PoCT) of bilirubin has been developed based on the formation of a green-coloured copper-bilirubin complex from a blue-coloured tetraamminecopper(II) sulphate complex. The reaction was studied and optimized by UV-Visible absorption spectroscopy and translated onto a paper strip. Hydrophobic circular well patterns on Whatman chromatography paper were created by wax printing. The tetraamminecopper(II) sulphate complex was drop cast and dried on the reagent zones in the wax-patterned paper. The images of reagent zones captured using a scanner were analyzed using ImageJ software. Bilirubin spiked blood serum was tested in the concentration range of 1.2 to 950 µM. The PAD exhibited sensitivities of 0.4197 a.u/μM and 0.1040 a.u/μM for concentration ranges of bilirubin 1.2 to 96 μM and 105 to 950 μM respectively and a low detection limit of 0.799 µM. The method is highly selective to bilirubin, even in the presence of other biomarkers in serum. A plasma separation membrane incorporated PAD was fabricated for the final testing and quantification of bilirubin from whole blood.
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Affiliation(s)
- A Lakshmi Devi
- Department of Sciences, Amrita School of Physical Sciences, Amrita Vishwa Vidyapeetham, Coimbatore 641 112, India; Amrita Biosensor Research Lab, Amrita School of Physical Sciences, Amrita Vishwa Vidyapeetham, Coimbatore 641 112, India.
| | - P E Resmi
- Department of Sciences, Amrita School of Physical Sciences, Amrita Vishwa Vidyapeetham, Coimbatore 641 112, India; Amrita Biosensor Research Lab, Amrita School of Physical Sciences, Amrita Vishwa Vidyapeetham, Coimbatore 641 112, India.
| | - Aarathi Pradeep
- Department of Sciences, Amrita School of Physical Sciences, Amrita Vishwa Vidyapeetham, Coimbatore 641 112, India; Amrita Biosensor Research Lab, Amrita School of Physical Sciences, Amrita Vishwa Vidyapeetham, Coimbatore 641 112, India.
| | - P V Suneesh
- Department of Sciences, Amrita School of Physical Sciences, Amrita Vishwa Vidyapeetham, Coimbatore 641 112, India; Amrita Biosensor Research Lab, Amrita School of Physical Sciences, Amrita Vishwa Vidyapeetham, Coimbatore 641 112, India.
| | - Bipin G Nair
- Amrita Biomedical Engineering Centre, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore 641 112, India; Amrita School of Biotechnology, Amrita Vishwa Vidyapeetham, Amritapuri 690 525, India.
| | - T G Satheesh Babu
- Department of Sciences, Amrita School of Physical Sciences, Amrita Vishwa Vidyapeetham, Coimbatore 641 112, India; Amrita Biosensor Research Lab, Amrita School of Physical Sciences, Amrita Vishwa Vidyapeetham, Coimbatore 641 112, India; Amrita Biomedical Engineering Centre, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore 641 112, India.
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Manasa G, Mascarenhas RJ, Shetti NP, Malode SJ, Mishra A, Basu S, Aminabhavi TM. Skin Patchable Sensor Surveillance for Continuous Glucose Monitoring. ACS APPLIED BIO MATERIALS 2022; 5:945-970. [PMID: 35170319 DOI: 10.1021/acsabm.1c01289] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Diabetes mellitus is a physiological and metabolic disorder affecting millions of people worldwide, associated with global morbidity, mortality, and financial expenses. Long-term complications can be avoided by frequent, continuous self-monitoring of blood glucose. Therefore, this review summarizes the current state-of-art glycemic control regimes involving measurement approaches and basic concepts. Following an introduction to the significance of continuous glucose sensing, we have tracked the evolution of glucose monitoring devices from minimally invasive to non-invasive methods to present an overview of the spectrum of continuous glucose monitoring (CGM) technologies. The conveniences, accuracy, and cost-effectiveness of the real-time CGM systems (rt-CGMs) are the factors considered for discussion. Transdermal biosensing and drug delivery routes have recently emerged as an innovative approach to substitute hypodermal needles. This work reviews skin-patchable glucose monitoring sensors for the first time, providing specifics of all the major findings in the past 6 years. Skin patch sensors and their progressive form, i.e., microneedle (MN) array sensory and delivery systems, are elaborated, covering self-powered, enzymatic, and non-enzymatic devices. The critical aspects reviewed are material design and assembly techniques focusing on flexibility, sensitivity, selectivity, biocompatibility, and user-end comfort. The review highlights the advantages of patchable MNs' multi-sensor technology designed to maintain precise blood glucose levels and administer diabetes drugs or insulin through a "sense and act" feedback loop. Subsequently, the limitations and potential challenges encountered from the MN array as rt-CGMs are listed. Furthermore, the current statuses of working prototype glucose-responsive "closed-loop" insulin delivery systems are discussed. Finally, the expected future developments and outlooks in clinical applications are discussed.
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Affiliation(s)
- G Manasa
- Electrochemistry Research Group, Department of Chemistry, St. Joseph's College (Autonomous), Lalbagh Road, Bangalore, Karnataka 560027, India
| | - Ronald J Mascarenhas
- Electrochemistry Research Group, Department of Chemistry, St. Joseph's College (Autonomous), Lalbagh Road, Bangalore, Karnataka 560027, India
| | - Nagaraj P Shetti
- Department of Chemistry, School of Advanced Sciences, KLE Technological University, Vidyanagar, Hubballi, Karnataka 580031, India
| | - Shweta J Malode
- Department of Chemistry, School of Advanced Sciences, KLE Technological University, Vidyanagar, Hubballi, Karnataka 580031, India
| | - Amit Mishra
- Department of Chemical Engineering, Inha University, Incheon 22212, South Korea
| | - Soumen Basu
- School of Chemistry and Biochemistry, Thapar Institute of Engineering & Technology, Patiala, Punjab 147004, India
| | - Tejraj M Aminabhavi
- Department of Chemistry, School of Advanced Sciences, KLE Technological University, Vidyanagar, Hubballi, Karnataka 580031, India
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Kwak J, Lee SS. Highly sensitive piezoelectric immunosensors employing signal amplification with gold nanoparticles. NANOTECHNOLOGY 2019; 30:445502. [PMID: 31362281 DOI: 10.1088/1361-6528/ab36c9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We present a quartz crystal microbalance (QCM) immunosensor for highly sensitive detection of prostate-specific antigen (PSA) in a human serum immunoassay. In particular, in this study, we employed signal amplification using and enlarging gold nanoparticles. Because QCM measures the change of resonance frequency according to the mass change occurring on the sensor surface, we could quantitatively analyze PSA based on a tremendous increase in mass by sandwich immunoassay using AuNP-conjugated anti-PSA-detecting antibody enhanced with subsequent gold staining. The limit of detection of the PSA immunoassay in human serum without gold staining enhancement was 687 pg ml-1 but was 48 pg ml-1 with the gold staining-mediated signal amplification. That is, amplifying the signal resulted in increased sensitivity and reproducibility of immunoassay in a human serum.
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Affiliation(s)
- Jiwon Kwak
- Department of Pharmaceutical Engineering, Soonchunhyang University, Asan, Republic of Korea
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Kuupiel D, Bawontuo V, Drain PK, Gwala N, Mashamba-Thompson TP. Supply chain management and accessibility to point-of-care testing in resource-limited settings: a systematic scoping review. BMC Health Serv Res 2019; 19:519. [PMID: 31340833 PMCID: PMC6657084 DOI: 10.1186/s12913-019-4351-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 07/16/2019] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND World Health Organization (WHO) has created an essential list of in-vitro diagnostics. Supply chain management (SCM) is said to be the vehicle that ensures that developed point-of-care (POC) tests reach their targeted settings for use. We therefore, mapped evidence on SCM of and accessibility to POC testing (availability and use of POC tests) in low- and middle-income countries (LMICs). METHODS We conducted a systematic scoping review using Arksey and O'Malley's framework as a guide. We searched PubMed; CINAHL; MEDLINE; WEB of Science; Science Direct; and Google Scholar databases for studies that focused on POC diagnostic tests and SCM. The review included studies that were undertaken in 140 countries defined by the World Bank as LMICs published up to August 2017. Two reviewers independently screened the abstracts and full articles against the eligibility criteria. The study used the mixed methods appraisal tool version 2011 to assess the risk of bias for the included studies. NVivo version 11 was employed to extract themes from all included studies and results presented using a narrative approach. RESULTS Of 292 studies identified in this review, only 15 published between 2009 and 2017 included evidence on POC diagnostics and SCM. Of the 15 studies, three were conducted in Zambia, one each in Mozambique, Uganda, Guatemala; South Africa, one in Burkina Faso, Zimbabwe, and one multi-country study (Tanzania, Uganda, China, Peru and Zambia and Brazil). Six studies were not country specific since they were not primary studies. Majority of the studies reported stock-outs of HIV, syphilis, and malaria POC tests. There was a moderate to substantial level of agreement between the reviewers' responses at full article screening stage (Kappa statistic = 0.80, p < 0.01). Nine studies underwent methodological quality appraisal and all, scored between 90 and 100%. CONCLUSIONS The results demonstrated limited published research on SCM of and accessibility to POC testing in LMICs. Further studies aimed at investigating SCM of POC tests in resource-limited settings to identify the barriers/challenges and provide a context-specific evidence-based solutions for policy/decision makers, implementers, and POC developers, funders, and development partners would be essential. PROSPERO REGISTRATION NUMBER CRD42016043711.
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Affiliation(s)
- Desmond Kuupiel
- Department of Public Health Medicine, School of Nursing and Public Health, University of KwaZulu-Natal, Durban, South Africa
| | - Vitalis Bawontuo
- Faculty of Health and Allied Sciences, Catholic University College of Ghana, Fiapre, Sunyani, Ghana
| | - Paul K. Drain
- International Clinical Research Center, Department of Global Health, University of Washington, Seattle, USA
- Division of Infectious Diseases, Department of Medicine, University of Washington, Seattle, USA
- Department of Epidemiology, University of Washington, Seattle, USA
| | - Nonjabulo Gwala
- Department of Public Health Medicine, School of Nursing and Public Health, University of KwaZulu-Natal, Durban, South Africa
| | - Tivani P. Mashamba-Thompson
- Department of Public Health Medicine, School of Nursing and Public Health, University of KwaZulu-Natal, Durban, South Africa
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Wolfe MG, Ali MM, Brennan JD. Enzymatic Litmus Test for Selective Colorimetric Detection of C-C Single Nucleotide Polymorphisms. Anal Chem 2019; 91:4735-4740. [PMID: 30869875 DOI: 10.1021/acs.analchem.9b00235] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A paper based litmus test has been developed using modulation of urease enzyme activity for detection of C-C mismatch single nucleotide polymorphisms (SNPs) by the naked eye. Urease is first inactivated with silver ions and printed onto paper microzones. Addition of DNA containing C-C mismatches reactivates urease via binding of Ag(I), allowing restoration of urease activity, hydrolysis of urea to produce ammonia, and an increase in pH, which is monitored colorimetrically using a pH indicator with a limit of detection of 11 nM DNA in 40 min. The assay system is easy to use, portable, and stable for at least 30 days at ambient temperature. To assess the versatility and practical application of the paper sensor, we used it to identify a G > C transversion present in human genomic DNA from a ductal carcinoma cell line, a mutation commonly found in breast cancer. We believe this new assay system has the potential to be a low-cost method for rapidly identifying DNA with the C-C mismatch SNP as a means of cancer screening in resource-limited areas.
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Affiliation(s)
- Michael G Wolfe
- Biointerfaces Institute , McMaster University , 1280 Main Street West , Hamilton , ON L8S 4O3 , Canada
| | - M Monsur Ali
- Biointerfaces Institute , McMaster University , 1280 Main Street West , Hamilton , ON L8S 4O3 , Canada
| | - John D Brennan
- Biointerfaces Institute , McMaster University , 1280 Main Street West , Hamilton , ON L8S 4O3 , Canada
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Fu E. Paper Microfluidics for POC Testing in Low-Resource Settings. Bioanalysis 2019. [DOI: 10.1007/978-981-13-6229-3_12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Montes-Cebrián Y, Del Torno-de Román L, Álvarez-Carulla A, Colomer-Farrarons J, Minteer SD, Sabaté N, Miribel-Català PL, Esquivel JP. 'Plug-and-Power' Point-of-Care diagnostics: A novel approach for self-powered electronic reader-based portable analytical devices. Biosens Bioelectron 2018; 118:88-96. [PMID: 30056304 DOI: 10.1016/j.bios.2018.07.034] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 07/13/2018] [Accepted: 07/16/2018] [Indexed: 12/27/2022]
Abstract
This paper presents an innovative approach in the portable Point-of-Care diagnostics field, the Plug-and-Power concept. In this new disposable sensor and plug-and-play reader paradigm, the energy required to perform a measurement is always available within the disposable test component. The reader unit contains all the required electronic modules to run the test, process data and display the result, but does not include any battery or power source. Instead, the disposable part acts as both the sensor and the power source. Additionally, this approach provides environmental benefits related to battery usage and disposal, as the paper-based power source has non-toxic redox chemistry that makes it eco-friendly and safe to follow the same waste stream as disposable test strips. The feasibility of this Plug-and-Power approach is demonstrated in this work with the development of a self-powered portable glucometer consisting of two parts: a test strip including a paper-based power source and a paper-based biofuel cell as a glucose sensor; and an application-specific battery-less electronic reader designed to extract the energy from the test strip, process the signal provided and show the glucose concentration on a display. The device was tested with human serum samples with glucose concentrations between 5 and 30 mM, providing quantitative results in good agreement with commercial measuring instruments. The advantages of the present approach can be extended to any kind of biosensors measuring different analytes and biological matrices, and in this way, strengthen the goals of Point-of-Care diagnostics towards laboratory decentralization, personalized medicine and improving patient compliance.
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Affiliation(s)
- Yaiza Montes-Cebrián
- Discrete-to-Integrated (D2In) Research Group, Department of Electronic and Biomedical Engineering, Faculty of Physics, University of Barcelona (UB), 1st Martí i Franquès St., 08028 Barcelona, Spain.
| | - Lorena Del Torno-de Román
- Instituto de Microelectrónica de Barcelona IMB-CNM (CSIC), C/ del Til·lers, Campus Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Barcelona, Spain.
| | - Albert Álvarez-Carulla
- Discrete-to-Integrated (D2In) Research Group, Department of Electronic and Biomedical Engineering, Faculty of Physics, University of Barcelona (UB), 1st Martí i Franquès St., 08028 Barcelona, Spain.
| | - Jordi Colomer-Farrarons
- Discrete-to-Integrated (D2In) Research Group, Department of Electronic and Biomedical Engineering, Faculty of Physics, University of Barcelona (UB), 1st Martí i Franquès St., 08028 Barcelona, Spain.
| | - Shelley D Minteer
- Department of Chemistry, University of Utah, 315 S 1400 E Room 2020, Salt Lake City, UT 84112, USA.
| | - Neus Sabaté
- Instituto de Microelectrónica de Barcelona IMB-CNM (CSIC), C/ del Til·lers, Campus Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Barcelona, Spain; Catalan Institution for Research and Advanced Studies (ICREA), Passeig Lluís Companys 23, 08010 Barcelona, Spain; Fuelium, Av. De Can Domenech - Edifici Eureka, Campus de la UAB, 08193 Bellaterra, Barcelona, Spain.
| | - Pere Ll Miribel-Català
- Discrete-to-Integrated (D2In) Research Group, Department of Electronic and Biomedical Engineering, Faculty of Physics, University of Barcelona (UB), 1st Martí i Franquès St., 08028 Barcelona, Spain.
| | - Juan Pablo Esquivel
- Instituto de Microelectrónica de Barcelona IMB-CNM (CSIC), C/ del Til·lers, Campus Universitat Autònoma de Barcelona (UAB), 08193 Bellaterra, Barcelona, Spain.
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Phillips EA, Young AK, Albarran N, Butler J, Lujan K, Hamad-Schifferli K, Gomez-Marquez J. Ampli: A Construction Set for Paperfluidic Systems. Adv Healthc Mater 2018; 7:e1800104. [PMID: 29766658 DOI: 10.1002/adhm.201800104] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Revised: 03/30/2018] [Indexed: 12/16/2022]
Abstract
The design and fabrication of reconfigurable, modular paperfluidics driven by a prefabricated reusable block library, asynchronous modular paperfluidic linear instrument-free (Ampli) block, are reported. The blocks are inspired by the plug-and-play modularity of electronic breadboards that lower prototyping barriers in circuit design. The resulting biochemical breadboard is a paperfluidic construction set that can be functionalized with chemical, biological, and electrical elements. Ampli blocks can form standard paperfluidic devices without any external instrumentation. Furthermore, their modular nature enhances fluidics in ways that fixed devices cannot. The blocks' ability to start, stop, modify, and reverse reaction flows, reagents, and rates in real time is demonstrated. These enhancements allow users to increase colorimetric signals, fine tune reaction times, and counter check multiplexed diagnostics for false positives or negatives. The modular construction demonstrates that field-ready, distributed fabrication of paper analytical systems can be standardized without requiring the "black box" of craft and technique inherent in paper-based systems. Ampli assembly and point-of-care redesign extends the usability of paper analytical systems and invites user-driven prototyping beyond the lab setting demonstrating "Design for Hack" in diagnostics.
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Affiliation(s)
- Elizabeth A. Phillips
- Institute for Medical Engineering and Science; Massachusetts Institute of Technology; Cambridge MA 02139 USA
- MIT International Design Centre; Massachusetts Institute of Technology; Cambridge MA 02139 USA
| | - Anna K. Young
- Institute for Medical Engineering and Science; Massachusetts Institute of Technology; Cambridge MA 02139 USA
- MIT International Design Centre; Massachusetts Institute of Technology; Cambridge MA 02139 USA
| | - Nikolas Albarran
- MIT International Design Centre; Massachusetts Institute of Technology; Cambridge MA 02139 USA
| | - Jonah Butler
- Institute for Medical Engineering and Science; Massachusetts Institute of Technology; Cambridge MA 02139 USA
- MIT International Design Centre; Massachusetts Institute of Technology; Cambridge MA 02139 USA
| | - Kaira Lujan
- Thayer School of Engineering; Dartmouth College; Hanover NH 03755 USA
| | | | - Jose Gomez-Marquez
- Institute for Medical Engineering and Science; Massachusetts Institute of Technology; Cambridge MA 02139 USA
- MIT International Design Centre; Massachusetts Institute of Technology; Cambridge MA 02139 USA
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Ng AHC, Fobel R, Fobel C, Lamanna J, Rackus DG, Summers A, Dixon C, Dryden MDM, Lam C, Ho M, Mufti NS, Lee V, Asri MAM, Sykes EA, Chamberlain MD, Joseph R, Ope M, Scobie HM, Knipes A, Rota PA, Marano N, Chege PM, Njuguna M, Nzunza R, Kisangau N, Kiogora J, Karuingi M, Burton JW, Borus P, Lam E, Wheeler AR. A digital microfluidic system for serological immunoassays in remote settings. Sci Transl Med 2018; 10:10/438/eaar6076. [DOI: 10.1126/scitranslmed.aar6076] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 04/06/2018] [Indexed: 12/29/2022]
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11
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Hu X, Li C, Feng C, Mao X, Xiang Y, Li G. One-step colorimetric detection of an antibody based on protein-induced unfolding of a G-quadruplex switch. Chem Commun (Camb) 2018; 53:4692-4694. [PMID: 28401205 DOI: 10.1039/c7cc00687j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple colorimetric assay is developed for the sensitive and selective detection of an antibody, which combines a protein binding-induced signaling approach with a novel DNAzyme-based conformational switching strategy.
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Affiliation(s)
- Xiaolu Hu
- State Key Laboratory of Pharmaceutical Biotechnology and Collaborative Innovation Center of Chemistry for Life Sciences, Department of Biochemistry, Nanjing University, Nanjing 210093, P. R. China.
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12
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Mauk MG, Song J, Liu C, Bau HH. Simple Approaches to Minimally-Instrumented, Microfluidic-Based Point-of-Care Nucleic Acid Amplification Tests. BIOSENSORS 2018; 8:E17. [PMID: 29495424 PMCID: PMC5872065 DOI: 10.3390/bios8010017] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 01/29/2018] [Accepted: 02/09/2018] [Indexed: 01/10/2023]
Abstract
Designs and applications of microfluidics-based devices for molecular diagnostics (Nucleic Acid Amplification Tests, NAATs) in infectious disease testing are reviewed, with emphasis on minimally instrumented, point-of-care (POC) tests for resource-limited settings. Microfluidic cartridges ('chips') that combine solid-phase nucleic acid extraction; isothermal enzymatic nucleic acid amplification; pre-stored, paraffin-encapsulated lyophilized reagents; and real-time or endpoint optical detection are described. These chips can be used with a companion module for separating plasma from blood through a combined sedimentation-filtration effect. Three reporter types: Fluorescence, colorimetric dyes, and bioluminescence; and a new paradigm for end-point detection based on a diffusion-reaction column are compared. Multiplexing (parallel amplification and detection of multiple targets) is demonstrated. Low-cost detection and added functionality (data analysis, control, communication) can be realized using a cellphone platform with the chip. Some related and similar-purposed approaches by others are surveyed.
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Affiliation(s)
- Michael G Mauk
- Mechanical Engineering and Applied Mechanics (MEAM), School of Engineering and Applied Science, University of Pennsylvania, Towne Building, 220 33rd Street, Philadelphia, PA 19104, USA.
| | - Jinzhao Song
- Mechanical Engineering and Applied Mechanics (MEAM), School of Engineering and Applied Science, University of Pennsylvania, Towne Building, 220 33rd Street, Philadelphia, PA 19104, USA.
| | - Changchun Liu
- Mechanical Engineering and Applied Mechanics (MEAM), School of Engineering and Applied Science, University of Pennsylvania, Towne Building, 220 33rd Street, Philadelphia, PA 19104, USA.
| | - Haim H Bau
- Mechanical Engineering and Applied Mechanics (MEAM), School of Engineering and Applied Science, University of Pennsylvania, Towne Building, 220 33rd Street, Philadelphia, PA 19104, USA.
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Bruch R, Kling A, Urban GA, Dincer C. Dry Film Photoresist-based Electrochemical Microfluidic Biosensor Platform: Device Fabrication, On-chip Assay Preparation, and System Operation. J Vis Exp 2017:56105. [PMID: 28994807 PMCID: PMC5752260 DOI: 10.3791/56105] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
In recent years, biomarker diagnostics became an indispensable tool for the diagnosis of human disease, especially for the point-of-care diagnostics. An easy-to-use and low-cost sensor platform is highly desired to measure various types of analytes (e.g., biomarkers, hormones, and drugs) quantitatively and specifically. For this reason, dry film photoresist technology - enabling cheap, facile, and high-throughput fabrication - was used to manufacture the microfluidic biosensor presented here. Depending on the bioassay used afterwards, the versatile platform is capable of detecting various types of biomolecules. For the fabrication of the device, platinum electrodes are structured on a flexible polyimide (PI) foil in the only clean-room process step. The PI foil serves as a substrate for the electrodes, which are insulated with an epoxy-based photoresist. The microfluidic channel is subsequently generated by the development and lamination of dry film photoresist (DFR) foils onto the PI wafer. By using a hydrophobic stopping barrier in the channel, the channel is separated into two specific areas: an immobilization section for the enzyme-linked assay and an electrochemical measurement cell for the amperometric signal readout. The on-chip bioassay immobilization is performed by the adsorption of the biomolecules to the channel surface. The glucose oxidase enzyme is used as a transducer for electrochemical signal generation. In the presence of the substrate, glucose, hydrogen peroxide is produced, which is detected at the platinum working electrode. The stop-flow technique is applied to obtain signal amplification along with rapid detection. Different biomolecules can quantitatively be measured by means of the introduced microfluidic system, giving an indication of different types of diseases, or, in regard to therapeutic drug monitoring, facilitating a personalized therapy.
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Affiliation(s)
- Richard Bruch
- Department of Microsystems Engineering, University of Freiburg
| | - André Kling
- Department of Microsystems Engineering, University of Freiburg; Department of Biosystems Science and Engineering, ETH Zurich
| | - Gerald A Urban
- Department of Microsystems Engineering, University of Freiburg; Freiburg Materials Research Center, University of Freiburg
| | - Can Dincer
- Department of Microsystems Engineering, University of Freiburg; Freiburg Materials Research Center, University of Freiburg;
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Chang HJ, Voyvodic PL, Zúñiga A, Bonnet J. Microbially derived biosensors for diagnosis, monitoring and epidemiology. Microb Biotechnol 2017; 10:1031-1035. [PMID: 28771944 PMCID: PMC5609271 DOI: 10.1111/1751-7915.12791] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Accepted: 07/04/2017] [Indexed: 11/27/2022] Open
Abstract
Living cells have evolved to detect and process various signals and can self-replicate, presenting an attractive platform for engineering scalable and affordable biosensing devices. Microbes are perfect candidates: they are inexpensive and easy to manipulate and store. Recent advances in synthetic biology promise to streamline the engineering of microbial biosensors with unprecedented capabilities. Here we review the applications of microbially-derived biosensors with a focus on environmental monitoring and healthcare applications. We also identify critical challenges that need to be addressed in order to translate the potential of synthetic microbial biosensors into large-scale, real-world applications.
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Affiliation(s)
- Hung-Ju Chang
- Centre de Biochimie Structurale, INSERM U1054, CNRS UMR5048, University of Montpellier, Montpellier, France
| | - Peter L Voyvodic
- Centre de Biochimie Structurale, INSERM U1054, CNRS UMR5048, University of Montpellier, Montpellier, France
| | - Ana Zúñiga
- Centre de Biochimie Structurale, INSERM U1054, CNRS UMR5048, University of Montpellier, Montpellier, France
| | - Jérôme Bonnet
- Centre de Biochimie Structurale, INSERM U1054, CNRS UMR5048, University of Montpellier, Montpellier, France
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15
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Lim WY, Goh BT, Khor SM. Microfluidic paper-based analytical devices for potential use in quantitative and direct detection of disease biomarkers in clinical analysis. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1060:424-442. [PMID: 28683395 DOI: 10.1016/j.jchromb.2017.06.040] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 06/19/2017] [Accepted: 06/21/2017] [Indexed: 12/11/2022]
Abstract
Clinicians, working in the health-care diagnostic systems of developing countries, currently face the challenges of rising costs, increased number of patient visits, and limited resources. A significant trend is using low-cost substrates to develop microfluidic devices for diagnostic purposes. Various fabrication techniques, materials, and detection methods have been explored to develop these devices. Microfluidic paper-based analytical devices (μPADs) have gained attention for sensing multiplex analytes, confirming diagnostic test results, rapid sample analysis, and reducing the volume of samples and analytical reagents. μPADs, which can provide accurate and reliable direct measurement without sample pretreatment, can reduce patient medical burden and yield rapid test results, aiding physicians in choosing appropriate treatment. The objectives of this review are to provide an overview of the strategies used for developing paper-based sensors with enhanced analytical performances and to discuss the current challenges, limitations, advantages, disadvantages, and future prospects of paper-based microfluidic platforms in clinical diagnostics. μPADs, with validated and justified analytical performances, can potentially improve the quality of life by providing inexpensive, rapid, portable, biodegradable, and reliable diagnostics.
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Affiliation(s)
- Wei Yin Lim
- Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Boon Tong Goh
- Low Dimensional Materials Research Centre, Department of Physics, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Sook Mei Khor
- Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia; University Malaya Centre for Ionic Liquids (UMCiL), University of Malaya, 50603 Kuala Lumpur, Malaysia.
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16
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Roche PJR, Najih M, Lee SS, Beitel LK, Carnevale ML, Paliouras M, Kirk AG, Trifiro MA. Real time plasmonic qPCR: how fast is ultra-fast? 30 cycles in 54 seconds. Analyst 2017; 142:1746-1755. [PMID: 28443837 DOI: 10.1039/c7an00304h] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polymerase Chain Reaction (PCR) is a critical tool for biological research investigators but recently it also has been making a significant impact in clinical, veterinary and agricultural applications. Plasmonic PCR, which employs the very efficient heat transfer of optically irradiated metallic nanoparticles, is a simple and powerful methodology to drive PCR reactions. The scalability of next generation plasmonic PCR technology will introduce various forms of PCR applications ranging from small footprint portable point of care diagnostic devices to large footprint central laboratory multiplexing devices. In a significant advance, we have introduced a real time plasmonic PCR and explored the ability of ultra-fast cycling compatible with both label-free and fluorescence-based monitoring of amplicon production. Furthermore, plasmonic PCR has been substantially optimized to now deliver a 30 cycle PCR in 54 seconds, with a detectable product. The advances described here will have an immediate impact on the further development of the use of plasmonic PCR playing a critical role in rapid point of care diagnostics.
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Affiliation(s)
- Philip J R Roche
- Lady Davis Institute for Medical Research - Jewish General Hospital, Montreal, QC, Canada.
| | - Mohamed Najih
- Department of Electrical and Computer Engineering, McGill University, Montreal, Quebec, Canada.
| | - Seung S Lee
- Lady Davis Institute for Medical Research - Jewish General Hospital, Montreal, QC, Canada.
| | - Lenore K Beitel
- Lady Davis Institute for Medical Research - Jewish General Hospital, Montreal, QC, Canada.
| | - Matthew L Carnevale
- Lady Davis Institute for Medical Research - Jewish General Hospital, Montreal, QC, Canada.
| | - Miltiadis Paliouras
- Lady Davis Institute for Medical Research - Jewish General Hospital, Montreal, QC, Canada. and Department of Medicine, McGill University, Montreal, QC, Canada
| | - Andrew G Kirk
- Department of Electrical and Computer Engineering, McGill University, Montreal, Quebec, Canada.
| | - Mark A Trifiro
- Lady Davis Institute for Medical Research - Jewish General Hospital, Montreal, QC, Canada. and Department of Medicine, McGill University, Montreal, QC, Canada
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17
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Narahari T, Dendukuri D, Murthy SK. Electrically-Actuated Valves for Woven Fabric Lateral Flow Devices. Anal Chem 2017; 89:4671-4679. [DOI: 10.1021/acs.analchem.7b00275] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tanya Narahari
- Department
of Chemical Engineering, Northeastern University, 360 Huntington Avenue, 313 Snell
Engineering Center, Boston, Massachusetts 02115, United States
| | - Dhananjaya Dendukuri
- Achira Labs Private Limited, 66B, 13th Cross Road, 2nd Main Road, J.P Nagar Phase III, Bangalore 560078, Karnataka, India
| | - Shashi K. Murthy
- Department
of Chemical Engineering, Northeastern University, 360 Huntington Avenue, 313 Snell
Engineering Center, Boston, Massachusetts 02115, United States
- Barnett
Institute of Chemical and Biological Analysis, Northeastern University, Boston, Massachusetts 02115, United States
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18
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Eggimann S, Mutzner L, Wani O, Schneider MY, Spuhler D, Moy de Vitry M, Beutler P, Maurer M. The Potential of Knowing More: A Review of Data-Driven Urban Water Management. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:2538-2553. [PMID: 28125222 DOI: 10.1021/acs.est.6b04267] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The promise of collecting and utilizing large amounts of data has never been greater in the history of urban water management (UWM). This paper reviews several data-driven approaches which play a key role in bringing forward a sea change. It critically investigates whether data-driven UWM offers a promising foundation for addressing current challenges and supporting fundamental changes in UWM. We discuss the examples of better rain-data management, urban pluvial flood-risk management and forecasting, drinking water and sewer network operation and management, integrated design and management, increasing water productivity, wastewater-based epidemiology and on-site water and wastewater treatment. The accumulated evidence from literature points toward a future UWM that offers significant potential benefits thanks to increased collection and utilization of data. The findings show that data-driven UWM allows us to develop and apply novel methods, to optimize the efficiency of the current network-based approach, and to extend functionality of today's systems. However, generic challenges related to data-driven approaches (e.g., data processing, data availability, data quality, data costs) and the specific challenges of data-driven UWM need to be addressed, namely data access and ownership, current engineering practices and the difficulty of assessing the cost benefits of data-driven UWM.
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Affiliation(s)
- Sven Eggimann
- Eawag, Swiss Federal Institute of Aquatic Science and Technology , 8600 Dübendorf, Switzerland
- Institute of Civil, Environmental and Geomatic Engineering, ETH Zürich , 8093 Zurich, Switzerland
| | - Lena Mutzner
- Eawag, Swiss Federal Institute of Aquatic Science and Technology , 8600 Dübendorf, Switzerland
- Institute of Civil, Environmental and Geomatic Engineering, ETH Zürich , 8093 Zurich, Switzerland
| | - Omar Wani
- Eawag, Swiss Federal Institute of Aquatic Science and Technology , 8600 Dübendorf, Switzerland
- Institute of Civil, Environmental and Geomatic Engineering, ETH Zürich , 8093 Zurich, Switzerland
| | - Mariane Yvonne Schneider
- Eawag, Swiss Federal Institute of Aquatic Science and Technology , 8600 Dübendorf, Switzerland
- Institute of Civil, Environmental and Geomatic Engineering, ETH Zürich , 8093 Zurich, Switzerland
| | - Dorothee Spuhler
- Eawag, Swiss Federal Institute of Aquatic Science and Technology , 8600 Dübendorf, Switzerland
- Institute of Civil, Environmental and Geomatic Engineering, ETH Zürich , 8093 Zurich, Switzerland
| | - Matthew Moy de Vitry
- Eawag, Swiss Federal Institute of Aquatic Science and Technology , 8600 Dübendorf, Switzerland
- Institute of Civil, Environmental and Geomatic Engineering, ETH Zürich , 8093 Zurich, Switzerland
| | - Philipp Beutler
- Eawag, Swiss Federal Institute of Aquatic Science and Technology , 8600 Dübendorf, Switzerland
- Institute of Civil, Environmental and Geomatic Engineering, ETH Zürich , 8093 Zurich, Switzerland
| | - Max Maurer
- Eawag, Swiss Federal Institute of Aquatic Science and Technology , 8600 Dübendorf, Switzerland
- Institute of Civil, Environmental and Geomatic Engineering, ETH Zürich , 8093 Zurich, Switzerland
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Anany H, Chou Y, Cucic S, Derda R, Evoy S, Griffiths M. From Bits and Pieces to Whole Phage to Nanomachines: Pathogen Detection Using Bacteriophages. Annu Rev Food Sci Technol 2017; 8:305-329. [DOI: 10.1146/annurev-food-041715-033235] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- H. Anany
- Canadian Institute for Food Safety, University of Guelph, Guelph, Ontario, Canada N1G 2W1;, ,
- Department of Microbiology, Faculty of Science, Ain Shams University, Cairo, Egypt 11566
| | - Y. Chou
- Department of Chemistry and Alberta Glycomics Centre, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - S. Cucic
- Canadian Institute for Food Safety, University of Guelph, Guelph, Ontario, Canada N1G 2W1;, ,
| | - R. Derda
- Department of Chemistry and Alberta Glycomics Centre, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - S. Evoy
- Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - M.W. Griffiths
- Canadian Institute for Food Safety, University of Guelph, Guelph, Ontario, Canada N1G 2W1;, ,
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20
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Fu E, Downs C. Progress in the development and integration of fluid flow control tools in paper microfluidics. LAB ON A CHIP 2017; 17:614-628. [PMID: 28119982 DOI: 10.1039/c6lc01451h] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Paper microfluidics is a rapidly growing subfield of microfluidics in which paper-like porous materials are used to create analytical devices. There is a need for higher performance field-use tests for many application domains including human disease diagnosis, environmental monitoring, and veterinary medicine. A key factor in creating high performance paper-based devices is the ability to manipulate fluid flow within the devices. This critical review is focused on the progress that has been made in (i) the development of fluid flow control tools and (ii) the integration of those tools into paper microfluidic devices. Further, we strive to be comprehensive in our presentation and provide historical context through discussion and performance comparisons, when possible, of both relevant earlier work and recent work. Finally, we discuss the major areas of focus for fluid flow methods development to advance the potential of paper microfluidics for high-performance field applications.
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Affiliation(s)
- Elain Fu
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, USA.
| | - Corey Downs
- School of Chemical, Biological, and Environmental Engineering, Oregon State University, USA.
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21
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Introduction to Electrochemical Point-of-Care Devices. Bioanalysis 2017. [DOI: 10.1007/978-3-319-64801-9_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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22
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Kong T, Flanigan S, Weinstein M, Kalwa U, Legner C, Pandey S. A fast, reconfigurable flow switch for paper microfluidics based on selective wetting of folded paper actuator strips. LAB ON A CHIP 2017; 17:3621-3633. [PMID: 28945259 DOI: 10.1039/c7lc00620a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In paper microfluidics, the development of smart and versatile switches is critical for the regulation of fluid flow across multiple channels.
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Affiliation(s)
- Taejoon Kong
- Department of Electrical and Computer Engineering
- Iowa State University
- Ames
- USA
| | - Shawn Flanigan
- Department of Mechanical Engineering
- Iowa State University
- Ames
- USA
| | - Matthew Weinstein
- Department of Electrical and Computer Engineering
- Iowa State University
- Ames
- USA
| | - Upender Kalwa
- Department of Electrical and Computer Engineering
- Iowa State University
- Ames
- USA
| | - Christopher Legner
- Department of Electrical and Computer Engineering
- Iowa State University
- Ames
- USA
| | - Santosh Pandey
- Department of Electrical and Computer Engineering
- Iowa State University
- Ames
- USA
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23
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Páez-Avilés C, Juanola-Feliu E, Punter-Villagrasa J, Del Moral Zamora B, Homs-Corbera A, Colomer-Farrarons J, Miribel-Català PL, Samitier J. Combined Dielectrophoresis and Impedance Systems for Bacteria Analysis in Microfluidic On-Chip Platforms. SENSORS (BASEL, SWITZERLAND) 2016; 16:E1514. [PMID: 27649201 PMCID: PMC5038787 DOI: 10.3390/s16091514] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 08/12/2016] [Accepted: 09/09/2016] [Indexed: 12/13/2022]
Abstract
Bacteria concentration and detection is time-consuming in regular microbiology procedures aimed to facilitate the detection and analysis of these cells at very low concentrations. Traditional methods are effective but often require several days to complete. This scenario results in low bioanalytical and diagnostic methodologies with associated increased costs and complexity. In recent years, the exploitation of the intrinsic electrical properties of cells has emerged as an appealing alternative approach for concentrating and detecting bacteria. The combination of dielectrophoresis (DEP) and impedance analysis (IA) in microfluidic on-chip platforms could be key to develop rapid, accurate, portable, simple-to-use and cost-effective microfluidic devices with a promising impact in medicine, public health, agricultural, food control and environmental areas. The present document reviews recent DEP and IA combined approaches and the latest relevant improvements focusing on bacteria concentration and detection, including selectivity, sensitivity, detection time, and conductivity variation enhancements. Furthermore, this review analyses future trends and challenges which need to be addressed in order to successfully commercialize these platforms resulting in an adequate social return of public-funded investments.
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Affiliation(s)
- Cristina Páez-Avilés
- Department of Electronics, Bioelectronics and Nanobioengineering Research Group (SIC-BIO), University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
| | - Esteve Juanola-Feliu
- Department of Electronics, Bioelectronics and Nanobioengineering Research Group (SIC-BIO), University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
| | - Jaime Punter-Villagrasa
- Department of Electronics, Bioelectronics and Nanobioengineering Research Group (SIC-BIO), University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
| | - Beatriz Del Moral Zamora
- Department of Electronics, Bioelectronics and Nanobioengineering Research Group (SIC-BIO), University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
| | - Antoni Homs-Corbera
- Department of Electronics, Bioelectronics and Nanobioengineering Research Group (SIC-BIO), University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
- IBEC-Institute of Bioengineering of Catalonia, Nanobioengineering Research Group, Baldiri Reixac 10-12, 08028 Barcelona, Spain.
- CIBER-BBN-Biomedical Research Networking Centre for Bioengineering, Biomaterials and Nanomedicine, María de Luna 11, Edificio CEEI, 50018 Zaragoza, Spain.
| | - Jordi Colomer-Farrarons
- Department of Electronics, Bioelectronics and Nanobioengineering Research Group (SIC-BIO), University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
| | - Pere Lluís Miribel-Català
- Department of Electronics, Bioelectronics and Nanobioengineering Research Group (SIC-BIO), University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
| | - Josep Samitier
- Department of Electronics, Bioelectronics and Nanobioengineering Research Group (SIC-BIO), University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
- IBEC-Institute of Bioengineering of Catalonia, Nanobioengineering Research Group, Baldiri Reixac 10-12, 08028 Barcelona, Spain.
- CIBER-BBN-Biomedical Research Networking Centre for Bioengineering, Biomaterials and Nanomedicine, María de Luna 11, Edificio CEEI, 50018 Zaragoza, Spain.
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Ndihokubwayo JB, Maruta T, Ndlovu N, Moyo S, Yahaya AA, Coulibaly SO, Kasolo F, Turgeon D, Abrol AP. Implementation of the World Health Organization Regional Office for Africa Stepwise Laboratory Quality Improvement Process Towards Accreditation. Afr J Lab Med 2016; 5:280. [PMID: 28879103 PMCID: PMC5436392 DOI: 10.4102/ajlm.v5i1.280] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 12/03/2015] [Indexed: 11/21/2022] Open
Abstract
Background The increase in disease burden has continued to weigh upon health systems in Africa. The role of the laboratory has become increasingly critical in the improvement of health for diagnosis, management and treatment of diseases. In response, the World Health Organization Regional Office for Africa (WHO AFRO) and its partners created the WHO AFRO Stepwise Laboratory (Quality) Improvement Process Towards Accreditation (SLIPTA) program. SLIPTA implementation process WHO AFRO defined a governance structure with roles and responsibilities for six main stakeholders. Laboratories were evaluated by auditors trained and certified by the African Society for Laboratory Medicine. Laboratory performance was measured using the WHO AFRO SLIPTA scoring checklist and recognition certificates rated with 1–5 stars were issued. Preliminary results By March 2015, 27 of the 47 (57%) WHO AFRO member states had appointed a SLIPTA focal point and 14 Ministers of Health had endorsed SLIPTA as the desired programme for continuous quality improvement. Ninety-eight auditors from 17 African countries, competent in the Portuguese (3), French (12) and English (83) languages, were trained and certified. The mean score for the 159 laboratories audited between May 2013 and March 2015 was 69% (median 70%; SD 11.5; interquartile range 62–77). Of these audited laboratories, 70% achieved 55% compliance or higher (2 or more stars) and 1% scored at least 95% (5 stars). The lowest scoring sections of the WHO AFRO SLIPTA checklist were sections 6 (Internal Audit) and 10 (Corrective Action), which both had mean scores below 50%. Conclusion The WHO AFRO SLIPTA is a process that countries with limited resources can adopt for effective implementation of quality management systems. Political commitment, ownership and investment in continuous quality improvement are integral components of the process.
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Affiliation(s)
| | - Talkmore Maruta
- African Society for Laboratory Medicine, Addis Ababa, Ethiopia
| | - Nqobile Ndlovu
- African Society for Laboratory Medicine, Addis Ababa, Ethiopia
| | - Sikhulile Moyo
- Botswana-Harvard AIDS Institute Partnerships, Gaborone, Botswana
| | - Ali Ahmed Yahaya
- World Health Organization, Regional Office for Africa, Brazzaville, Congo
| | | | - Francis Kasolo
- World Health Organization, Regional Office for Africa, Brazzaville, Congo
| | - David Turgeon
- United States Centers for Disease Control and Prevention, Center for Global Health, Division of Global HIV and Tuberculosis, Atlanta, Georgia, United States
| | - Angelii P Abrol
- United States Centers for Disease Control and Prevention, Center for Global Health, Division of Global HIV and Tuberculosis, Atlanta, Georgia, United States
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Courbet A, Endy D, Renard E, Molina F, Bonnet J. Detection of pathological biomarkers in human clinical samples via amplifying genetic switches and logic gates. Sci Transl Med 2016; 7:289ra83. [PMID: 26019219 DOI: 10.1126/scitranslmed.aaa3601] [Citation(s) in RCA: 143] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Whole-cell biosensors have several advantages for the detection of biological substances and have proven to be useful analytical tools. However, several hurdles have limited whole-cell biosensor application in the clinic, primarily their unreliable operation in complex media and low signal-to-noise ratio. We report that bacterial biosensors with genetically encoded digital amplifying genetic switches can detect clinically relevant biomarkers in human urine and serum. These bactosensors perform signal digitization and amplification, multiplexed signal processing with the use of Boolean logic gates, and data storage. In addition, we provide a framework with which to quantify whole-cell biosensor robustness in clinical samples together with a method for easily reprogramming the sensor module for distinct medical detection agendas. Last, we demonstrate that bactosensors can be used to detect pathological glycosuria in urine from diabetic patients. These next-generation whole-cell biosensors with improved computing and amplification capacity could meet clinical requirements and should enable new approaches for medical diagnosis.
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Affiliation(s)
- Alexis Courbet
- Sys2Diag FRE3690-CNRS/ALCEDIAG, Cap Delta, 34090 Montpellier, France
| | - Drew Endy
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA
| | - Eric Renard
- Sys2Diag FRE3690-CNRS/ALCEDIAG, Cap Delta, 34090 Montpellier, France. Department of Bioengineering, Stanford University, Stanford, CA 94305, USA. Department of Endocrinology, Diabetes, Nutrition, Montpellier University Hospital; INSERM 1411 Clinical Investigation Center; Institute of Functional Genomics, CNRS UMR 5203, INSERM U661, University of Montpellier, 34090 Montpellier, France. Centre de Biochimie Structurale, INSERM U1054, CNRS UMR5048, University of Montpellier, 29 Rue de Navacelles, 34090 Montpellier, France
| | - Franck Molina
- Sys2Diag FRE3690-CNRS/ALCEDIAG, Cap Delta, 34090 Montpellier, France.
| | - Jérôme Bonnet
- Sys2Diag FRE3690-CNRS/ALCEDIAG, Cap Delta, 34090 Montpellier, France. Department of Bioengineering, Stanford University, Stanford, CA 94305, USA. Department of Endocrinology, Diabetes, Nutrition, Montpellier University Hospital; INSERM 1411 Clinical Investigation Center; Institute of Functional Genomics, CNRS UMR 5203, INSERM U661, University of Montpellier, 34090 Montpellier, France. Centre de Biochimie Structurale, INSERM U1054, CNRS UMR5048, University of Montpellier, 29 Rue de Navacelles, 34090 Montpellier, France.
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PÁEZ-AVILÉS CRISTINA, JUANOLA-FELIU ESTEVE, BOGACHAN-TAHIRBEGI ISLAM, MIR MÓNICA, GONZÁLEZ-PIÑERO MANEL, SAMITIER JOSEP. INNOVATION AND TECHNOLOGY TRANSFER OF MEDICAL DEVICES FOSTERED BY CROSS-DISCIPLINARY COMMUNITIES OF PRACTITIONERS. INTERNATIONAL JOURNAL OF INNOVATION MANAGEMENT 2015. [DOI: 10.1142/s1363919615400125] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Commercialisation of emerging technological innovations such as medical devices can be a time-consuming and lengthy process resulting in a market entrance failure. To tackle this general problem, major challenges are being analysed, principally focusing on the role of Communities of Practitioners (CoPs) in the process of effective transfer of high-value emerging technologies from academia to market. Taking a case study approach, this document describes the role of a cross-disciplinary CoP in the technology transfer process within a convergence scenario. The case presented is a sensor array for ischemia detection developed by different practitioners from diverse organisations: university, research institution, hospital, and a scientific park. The analysis also involves the innovation ecosystem where all stakeholders are taken into account. This study contributes to a better understanding of the managerial implications of CoP fostering technology transfer and innovation, principally focused on the current need for new biomedical technologies and tools.
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Affiliation(s)
- CRISTINA PÁEZ-AVILÉS
- Department of Electronics, Faculty of Physics, Bioelectronics and Nano Bioengineering Research Group, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
| | - ESTEVE JUANOLA-FELIU
- Department of Electronics, Faculty of Physics, Bioelectronics and Nano Bioengineering Research Group, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
| | - ISLAM BOGACHAN-TAHIRBEGI
- Department of Electronics, Faculty of Physics, Bioelectronics and Nano Bioengineering Research Group, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
- Nano Bioengineering Laboratory, Institute for Bioengineering of Catalonia (IBEC), Baldiri Reixac, 10–12, 08028 Barcelona, Spain
| | - MÓNICA MIR
- Nano Bioengineering Laboratory, Institute for Bioengineering of Catalonia (IBEC), Baldiri Reixac, 10–12, 08028 Barcelona, Spain
- The Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER–BBN), Maria de Luna 11, 50018 Zaragoza, Spain
| | - MANEL GONZÁLEZ-PIÑERO
- Department of Public Economy, Political Economy and Spanish Economy, University of Barcelona, Av. Diagonal 690–696, 08034 Barcelona, Spain
- CREB-Biomedical Engineering Research Centre, Technical University of Catalonia, Pau Gargallo 5 08028, Barcelona, Spain
| | - JOSEP SAMITIER
- Department of Electronics, Faculty of Physics, Bioelectronics and Nano Bioengineering Research Group, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
- Nano Bioengineering Laboratory, Institute for Bioengineering of Catalonia (IBEC), Baldiri Reixac, 10–12, 08028 Barcelona, Spain
- The Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER–BBN), Maria de Luna 11, 50018 Zaragoza, Spain
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Ranallo S, Rossetti M, Plaxco KW, Vallée-Bélisle A, Ricci F. A Modular, DNA-Based Beacon for Single-Step Fluorescence Detection of Antibodies and Other Proteins. Angew Chem Int Ed Engl 2015; 54:13214-8. [PMID: 26337144 PMCID: PMC4757636 DOI: 10.1002/anie.201505179] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Revised: 07/20/2015] [Indexed: 12/17/2022]
Abstract
A versatile platform for the one-step fluorescence detection of both monovalent and multivalent proteins has been developed. This system is based on a conformation-switching stem-loop DNA scaffold that presents a small-molecule, polypeptide, or nucleic-acid recognition element on each of its two stem strands. The steric strain associated with the binding of one (multivalent) or two (monovalent) target molecules to these elements opens the stem, enhancing the emission of an attached fluorophore/quencher pair. The sensors respond rapidly (<10 min) and selectively, enabling the facile detection of specific proteins even in complex samples, such as blood serum. The versatility of the platform was demonstrated by detecting five bivalent proteins (four antibodies and the chemokine platelet-derived growth factor) and two monovalent proteins (a Fab fragment and the transcription factor TBP) with low nanomolar detection limits and no detectable cross-reactivity.
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Affiliation(s)
- Simona Ranallo
- Dipartimento di Scienze e Tecnologie Chimiche, University of Rome Tor Vergata, Via della Ricerca Scientifica, Rome 00133 (Italy)
| | - Marianna Rossetti
- Dipartimento di Scienze e Tecnologie Chimiche, University of Rome Tor Vergata, Via della Ricerca Scientifica, Rome 00133 (Italy)
| | - Kevin W Plaxco
- Center for Bioengineering & Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106 (USA)
| | - Alexis Vallée-Bélisle
- Laboratory of Biosensors & Nanomachines, Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre-ville, Montréal, Québec H3C 3J7 (Canada).
| | - Francesco Ricci
- Dipartimento di Scienze e Tecnologie Chimiche, University of Rome Tor Vergata, Via della Ricerca Scientifica, Rome 00133 (Italy).
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Brooks AD, Yeung K, Lewis GG, Phillips ST. A Strategy for Minimizing Background Signal in Autoinductive Signal Amplification Reactions for Point-of-Need Assays. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2015; 7:7186-7192. [PMID: 26604988 PMCID: PMC4654960 DOI: 10.1039/c5ay00508f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Rapid point-of-need assays are used to detect abundant biomarkers. The development of in situ signal amplification reactions could extend these assays to screening and triaging of patients for trace levels of biomarkers, even in resource-limited settings. We, and others, have developed small molecule-based in situ signal amplification reactions that eventually may be useful in this context. Herein we describe a design strategy for minimizing background signal that may occur in the absence of the target analyte, thus moving this in situ signal amplification approach one step closer to practical applications. Specifically, we describe allylic ethers as privileged connectors for linking detection and propagating functionality in a small molecule signal amplification reagent. Allylic ethers minimize background reactions while still enabling controlled release of a propagating signal in order to continue the signal amplification reaction. This paper characterizes the ability of allylic ethers to provide an amplified response, and offers insight into additional design considerations that are needed before in situ small molecule-based signal amplification becomes a viable strategy for point-of-need diagnostics.
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Ranallo S, Rossetti M, Plaxco KW, Vallée‐Bélisle A, Ricci F. A Modular, DNA‐Based Beacon for Single‐Step Fluorescence Detection of Antibodies and Other Proteins. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505179] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Simona Ranallo
- Dipartimento di Scienze e Tecnologie Chimiche, University of Rome Tor Vergata, Via della Ricerca Scientifica, Rome 00133 (Italy)
| | - Marianna Rossetti
- Dipartimento di Scienze e Tecnologie Chimiche, University of Rome Tor Vergata, Via della Ricerca Scientifica, Rome 00133 (Italy)
| | - Kevin W. Plaxco
- Center for Bioengineering & Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106 (USA)
| | - Alexis Vallée‐Bélisle
- Laboratory of Biosensors & Nanomachines, Département de Chimie, Université de Montréal, C.P. 6128, Succursale Centre‐ville, Montréal, Québec H3C 3J7 (Canada)
| | - Francesco Ricci
- Dipartimento di Scienze e Tecnologie Chimiche, University of Rome Tor Vergata, Via della Ricerca Scientifica, Rome 00133 (Italy)
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Toley BJ, Wang JA, Gupta M, Buser JR, Lafleur LK, Lutz BR, Fu E, Yager P. A versatile valving toolkit for automating fluidic operations in paper microfluidic devices. LAB ON A CHIP 2015; 15:1432-44. [PMID: 25606810 PMCID: PMC4391506 DOI: 10.1039/c4lc01155d] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Failure to utilize valving and automation techniques has restricted the complexity of fluidic operations that can be performed in paper microfluidic devices. We developed a toolkit of paper microfluidic valves and methods for automatic valve actuation using movable paper strips and fluid-triggered expanding elements. To the best of our knowledge, this is the first functional demonstration of this valving strategy in paper microfluidics. After introduction of fluids on devices, valves can actuate automatically after a) a certain period of time, or b) the passage of a certain volume of fluid. Timing of valve actuation can be tuned with greater than 8.5% accuracy by changing lengths of timing wicks, and we present timed on-valves, off-valves, and diversion (channel-switching) valves. The actuators require ~30 μl fluid to actuate and the time required to switch from one state to another ranges from ~5 s for short to ~50 s for longer wicks. For volume-metered actuation, the size of a metering pad can be adjusted to tune actuation volume, and we present two methods - both methods can achieve greater than 9% accuracy. Finally, we demonstrate the use of these valves in a device that conducts a multi-step assay for the detection of the malaria protein PfHRP2. Although slightly more complex than devices that do not have moving parts, this valving and automation toolkit considerably expands the capabilities of paper microfluidic devices. Components of this toolkit can be used to conduct arbitrarily complex, multi-step fluidic operations on paper-based devices, as demonstrated in the malaria assay device.
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Affiliation(s)
- Bhushan J Toley
- Department of Bioengineering, University of Washington, Seattle, WA 98195-5061, USA.
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31
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An instantaneous low-cost point-of-care anemia detection device. SENSORS 2015; 15:4564-77. [PMID: 25690552 PMCID: PMC4367425 DOI: 10.3390/s150204564] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 01/23/2015] [Accepted: 02/09/2015] [Indexed: 11/28/2022]
Abstract
We present a small, compact and portable device for point-of-care instantaneous early detection of anemia. The method used is based on direct hematocrit measurement from whole blood samples by means of impedance analysis. This device consists of a custom electronic instrumentation and a plug-and-play disposable sensor. The designed electronics rely on straightforward standards for low power consumption, resulting in a robust and low consumption device making it completely mobile with a long battery life. Another approach could be powering the system based on other solutions like indoor solar cells, or applying energy-harvesting solutions in order to remove the batteries. The sensing system is based on a disposable low-cost label-free three gold electrode commercial sensor for 50 μL blood samples. The device capability for anemia detection has been validated through 24 blood samples, obtained from four hospitalized patients at Hospital Clínic. As a result, the response, effectiveness and robustness of the portable point-of-care device to detect anemia has been proved with an accuracy error of 2.83% and a mean coefficient of variation of 2.57% without any particular case above 5%.
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Mauk MG, Liu C, Sadik M, Bau HH. Microfluidic devices for nucleic acid (NA) isolation, isothermal NA amplification, and real-time detection. Methods Mol Biol 2015; 1256:15-40. [PMID: 25626529 PMCID: PMC6540113 DOI: 10.1007/978-1-4939-2172-0_2] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Molecular (nucleic acid)-based diagnostics tests have many advantages over immunoassays, particularly with regard to sensitivity and specificity. Most on-site diagnostic tests, however, are immunoassay-based because conventional nucleic acid-based tests (NATs) require extensive sample processing, trained operators, and specialized equipment. To make NATs more convenient, especially for point-of-care diagnostics and on-site testing, a simple plastic microfluidic cassette ("chip") has been developed for nucleic acid-based testing of blood, other clinical specimens, food, water, and environmental samples. The chip combines nucleic acid isolation by solid-phase extraction; isothermal enzymatic amplification such as LAMP (Loop-mediated AMPlification), NASBA (Nucleic Acid Sequence Based Amplification), and RPA (Recombinase Polymerase Amplification); and real-time optical detection of DNA or RNA analytes. The microfluidic cassette incorporates an embedded nucleic acid binding membrane in the amplification reaction chamber. Target nucleic acids extracted from a lysate are captured on the membrane and amplified at a constant incubation temperature. The amplification product, labeled with a fluorophore reporter, is excited with a LED light source and monitored in situ in real time with a photodiode or a CCD detector (such as available in a smartphone). For blood analysis, a companion filtration device that separates plasma from whole blood to provide cell-free samples for virus and bacterial lysis and nucleic acid testing in the microfluidic chip has also been developed. For HIV virus detection in blood, the microfluidic NAT chip achieves a sensitivity and specificity that are nearly comparable to conventional benchtop protocols using spin columns and thermal cyclers.
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Affiliation(s)
- Michael G Mauk
- Department of Mechanical Engineering and Applied Mechanics, School of Engineering and Applied Science, University of Pennsylvania, 220 South 33rd Street, 107 towne building, Philadelphia, PA, 19104-6315, USA
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Ng AHC, Lee M, Choi K, Fischer AT, Robinson JM, Wheeler AR. Digital microfluidic platform for the detection of rubella infection and immunity: a proof of concept. Clin Chem 2014; 61:420-9. [PMID: 25512641 DOI: 10.1373/clinchem.2014.232181] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Whereas disease surveillance for infectious diseases such as rubella is important, it is critical to identify pregnant women at risk of passing rubella to their offspring, which can be fatal and can result in congenital rubella syndrome (CRS). The traditional centralized model for diagnosing rubella is cost-prohibitive in resource-limited settings, representing a major obstacle to the prevention of CRS. As a step toward decentralized diagnostic systems, we developed a proof-of-concept digital microfluidic (DMF) diagnostic platform that possesses the flexibility and performance of automated immunoassay platforms used in central facilities, but with a form factor the size of a shoebox. METHODS DMF immunoassays were developed with integrated sample preparation for the detection of rubella virus (RV) IgG and IgM. The performance (sensitivity and specificity) of the assays was evaluated with serum and plasma samples from a commercial antirubella mixed-titer performance panel. RESULTS The new platform performed the essential processing steps, including sample aliquoting for 4 parallel assays, sample dilution, and IgG blocking. Testing of performance panel samples yielded diagnostic sensitivity and specificity of 100% and 100% for both RV IgG and RV IgM. With 1.8 μL sample per assay, 4 parallel assays were performed in approximately 30 min with <10% mean CV. CONCLUSIONS This proof of concept establishes DMF-powered immunoassays as being potentially useful for the diagnosis of infectious disease.
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Affiliation(s)
- Alphonsus H C Ng
- Institute of Biomaterials and Biomedical Engineering, Donnelly Centre for Cellular and Biomolecular Research, Toronto, ON, Canada
| | - Misan Lee
- Innis College, and Donnelly Centre for Cellular and Biomolecular Research, Toronto, ON, Canada
| | - Kihwan Choi
- Donnelly Centre for Cellular and Biomolecular Research, Toronto, ON, Canada; Department of Chemistry, University of Toronto, Toronto, ON, Canada
| | | | | | - Aaron R Wheeler
- Institute of Biomaterials and Biomedical Engineering, Donnelly Centre for Cellular and Biomolecular Research, Toronto, ON, Canada; Department of Chemistry, University of Toronto, Toronto, ON, Canada;
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Walker FM, Ahmad KM, Eisenstein M, Soh HT. Transformation of personal computers and mobile phones into genetic diagnostic systems. Anal Chem 2014; 86:9236-41. [PMID: 25223929 PMCID: PMC4165218 DOI: 10.1021/ac5022419] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 08/06/2014] [Indexed: 12/15/2022]
Abstract
Molecular diagnostics based on the polymerase chain reaction (PCR) offer rapid and sensitive means for detecting infectious disease, but prohibitive costs have impeded their use in resource-limited settings where such diseases are endemic. In this work, we report an innovative method for transforming a desktop computer and a mobile camera phone--devices that have become readily accessible in developing countries--into a highly sensitive DNA detection system. This transformation was achieved by converting a desktop computer into a de facto thermal cycler with software that controls the temperature of the central processing unit (CPU), allowing for highly efficient PCR. Next, we reconfigured the mobile phone into a fluorescence imager by adding a low-cost filter, which enabled us to quantitatively measure the resulting PCR amplicons. Our system is highly sensitive, achieving quantitative detection of as little as 9.6 attograms of target DNA, and we show that its performance is comparable to advanced laboratory instruments at approximately 1/500th of the cost. Finally, in order to demonstrate clinical utility, we have used our platform for the successful detection of genomic DNA from the parasite that causes Chagas disease, Trypanosoma cruzi, directly in whole, unprocessed human blood at concentrations 4-fold below the clinical titer of the parasite.
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Affiliation(s)
- Faye M. Walker
- Department
of Chemistry and Biochemistry, University
of California, Santa Barbara, California 93106, United States
| | - Kareem M. Ahmad
- Interdepartmental
Program in Biomolecular Science and Engineering, University of California, Santa
Barbara, California 93106, United States
| | - Michael Eisenstein
- Department
of Materials, University of California, Santa Barbara, California 93106, United States
- Department
of Mechanical Engineering, University of
California, Santa Barbara, California 93106, United States
| | - H. Tom Soh
- Interdepartmental
Program in Biomolecular Science and Engineering, University of California, Santa
Barbara, California 93106, United States
- Department
of Materials, University of California, Santa Barbara, California 93106, United States
- Department
of Mechanical Engineering, University of
California, Santa Barbara, California 93106, United States
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Thom NK, Lewis GG, Yeung K, Phillips ST. Quantitative Fluorescence Assays Using a Self-Powered Paper-Based Microfluidic Device and a Camera-Equipped Cellular Phone. RSC Adv 2014; 4:1334-1340. [PMID: 24490035 PMCID: PMC3904390 DOI: 10.1039/c3ra44717k] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Fluorescence assays often require specialized equipment and, therefore, are not easily implemented in resource-limited environments. Herein we describe a point-of-care assay strategy in which fluorescence in the visible region is used as a readout, while a camera-equipped cellular phone is used to capture the fluorescent response and quantify the assay. The fluorescence assay is made possible using a paper-based microfluidic device that contains an internal fluidic battery, a surface-mount LED, a 2-mm section of a clear straw as a cuvette, and an appropriately-designed small molecule reagent that transforms from weakly fluorescent to highly fluorescent when exposed to a specific enzyme biomarker. The resulting visible fluorescence is digitized by photographing the assay region using a camera-equipped cellular phone. The digital images are then quantified using image processing software to provide sensitive as well as quantitative results. In a model 30 min assay, the enzyme β-D-galactosidase was measured quantitatively down to 700 pM levels. This Communication describes the design of these types of assays in paper-based microfluidic devices and characterizes the key parameters that affect the sensitivity and reproducibility of the technique.
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Affiliation(s)
- Nicole K. Thom
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA; Fax: 814 865 5235; Tel: 814 867 2502
| | - Gregory G. Lewis
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA; Fax: 814 865 5235; Tel: 814 867 2502
| | - Kimy Yeung
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA; Fax: 814 865 5235; Tel: 814 867 2502
| | - Scott T. Phillips
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA; Fax: 814 865 5235; Tel: 814 867 2502
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Lewis GG, Robbins JS, Phillips ST. Point-of-care assay platform for quantifying active enzymes to femtomolar levels using measurements of time as the readout. Anal Chem 2013; 85:10432-9. [PMID: 24074247 DOI: 10.1021/ac402415v] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
This Article describes a strategy for quantifying active enzyme analytes in a paper-based device by measuring the time for a reference region in the paper to turn green relative to an assay region. The assay requires a single step by the user, yet accounts for variations in sample volume, assay temperature, humidity, and contaminants in a sample that would otherwise prevent a quantitative measurement. The assay is capable of measuring enzymes in the low to mid femtomolar range with measurement times that range from ~30 s to ~15 min (lower measurement times correspond to lower quantities of the analyte). Different targets can be selected in the assay by changing a small molecule reagent within the paper-based device, and the sensitivity and dynamic range of the assays can be tuned easily by changing the composition and quantity of a signal amplification reagent or by modifying the configuration of the paper-based microfluidic device. By tuning these parameters, limits-of-detection for assays can be adjusted over an analyte concentration range of low femtomolar to low nanomolar, with dynamic ranges for the assays of at least 1 order of magnitude. Furthermore, the assay strategy is compatible with complex fluids such as serum.
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Affiliation(s)
- Gregory G Lewis
- Department of Chemistry, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
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Granger JH, Granger MC, Firpo MA, Mulvihill SJ, Porter MD. Toward development of a surface-enhanced Raman scattering (SERS)-based cancer diagnostic immunoassay panel. Analyst 2013; 138:410-6. [PMID: 23150876 PMCID: PMC3519366 DOI: 10.1039/c2an36128k] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Proteomic analyses of readily obtained human fluids (e.g., serum, urine, and saliva) indicate that the diagnosis of complex diseases will be enhanced by the simultaneous measurement of multiple biomarkers from such samples. This paper describes the development of a nanoparticle-based multiplexed platform that has the potential for simultaneous read-out of large numbers of biomolecules. For this purpose, we have chosen pancreatic adenocarcinoma (PA) as a test bed for diagnosis and prognosis. PA is a devastating form of cancer in which an estimated 86% of diagnoses resulted in death in the United States in 2010. The high mortality rate is due, in part, to the asymptomatic development of the disease and the dearth of sensitive diagnostics available for early detection. One promising route lies in the development of a serum biomarker panel that can generate a signature unique to early stage PA. We describe the design and development of a proof-of-concept PA biomarker immunoassay array coupled with surface-enhanced Raman scattering (SERS) as a sensitive readout method.
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Affiliation(s)
- Jennifer H Granger
- Department of Chemistry, University of Utah, Salt Lake City, UT 84112, USA.
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Chou J, Wong J, Christodoulides N, Floriano PN, Sanchez X, McDevitt J. Porous bead-based diagnostic platforms: bridging the gaps in healthcare. SENSORS (BASEL, SWITZERLAND) 2012; 12:15467-99. [PMID: 23202219 PMCID: PMC3522972 DOI: 10.3390/s121115467] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Revised: 10/25/2012] [Accepted: 11/01/2012] [Indexed: 01/11/2023]
Abstract
Advances in lab-on-a-chip systems have strong potential for multiplexed detection of a wide range of analytes with reduced sample and reagent volume; lower costs and shorter analysis times. The completion of high-fidelity multiplexed and multiclass assays remains a challenge for the medical microdevice field; as it struggles to achieve and expand upon at the point-of-care the quality of results that are achieved now routinely in remote laboratory settings. This review article serves to explore for the first time the key intersection of multiplexed bead-based detection systems with integrated microfluidic structures alongside porous capture elements together with biomarker validation studies. These strategically important elements are evaluated here in the context of platform generation as suitable for near-patient testing. Essential issues related to the scalability of these modular sensor ensembles are explored as are attempts to move such multiplexed and multiclass platforms into large-scale clinical trials. Recent efforts in these bead sensors have shown advantages over planar microarrays in terms of their capacity to generate multiplexed test results with shorter analysis times. Through high surface-to-volume ratios and encoding capabilities; porous bead-based ensembles; when combined with microfluidic elements; allow for high-throughput testing for enzymatic assays; general chemistries; protein; antibody and oligonucleotide applications.
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Affiliation(s)
- Jie Chou
- Department of Bioengineering, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA; E-Mails: (J.C.); (N.C.); (P.N.F.); (X.S.)
| | - Jorge Wong
- Department of Chemistry, University of Texas at Austin, 1 University Station A5300, Austin, TX 78712, USA; E-Mail:
| | - Nicolaos Christodoulides
- Department of Bioengineering, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA; E-Mails: (J.C.); (N.C.); (P.N.F.); (X.S.)
- Department of Chemistry, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA
| | - Pierre N. Floriano
- Department of Bioengineering, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA; E-Mails: (J.C.); (N.C.); (P.N.F.); (X.S.)
- Department of Chemistry, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA
| | - Ximena Sanchez
- Department of Bioengineering, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA; E-Mails: (J.C.); (N.C.); (P.N.F.); (X.S.)
- Department of Chemistry, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA
| | - John McDevitt
- Department of Bioengineering, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA; E-Mails: (J.C.); (N.C.); (P.N.F.); (X.S.)
- Department of Chemistry, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA
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Opportunities for improved serodiagnosis of human tuberculosis, bovine tuberculosis, and paratuberculosis. Vet Med Int 2012; 2012:674238. [PMID: 22720192 PMCID: PMC3375143 DOI: 10.1155/2012/674238] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2012] [Accepted: 04/02/2012] [Indexed: 11/21/2022] Open
Abstract
Mycobacterial infections—tuberculosis (TB), bovine tuberculosis (bTB), and Johne's disease (JD)—are major infectious diseases of both human and animals. Methods presently in use for diagnosis of mycobacterial infections include bacterial culture, nucleic acid amplification, tuberculin skin test, interferon-γ assay, and serology. Serological tests have several advantages over other methods, including short turn-around time, relatively simple procedures, and low cost. However, current serodiagnostic methods for TB, bTB and JD exhibit low sensitivity and/or specificity. Recent studies that have aimed to develop improved serodiagnostic tests have mostly focused on identifying useful species-specific protein antigens. A review of recent attempts to improve diagnostic test performance indicates that the use of multiple antigens can improve the accuracy of serodiagnosis of these mycobacterial diseases. Mycobacteria also produce a variety of species-specific nonprotein molecules; however, only a few such molecules (e.g., cord factor and lipoarabinomannan) have so far been evaluated for their effectiveness as diagnostic antigens. For TB and bTB, there has been recent progress in developing laboratory-free diagnostic methods. New technologies such as microfluidics and “Lab-on-Chip” are examples of promising new technologies that can underpin development of laboratory-free diagnostic devices for these mycobacterial infections.
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