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Electrochemical Detection of Genomic DNA Utilizing Recombinase Polymerase Amplification and Stem-Loop Probe
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology.ORCID iD: 0000-0003-0788-5107
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology.ORCID iD: 0000-0001-9656-5521
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2020 (English)In: ACS Omega, E-ISSN 2470-1343, Vol. 5, no 21, p. 12103-12109Article in journal (Refereed) Published
Abstract [en]

Nucleic acid tests integrated into digital point-of-care (POC) diagnostic systems have great potential for the future of health care. However, current methods of DNA amplification and detection require bulky and expensive equipment, many steps, and long process times, which complicate their integration into POC devices. We have combined an isothermal DNA amplification method, recombinase polymerase amplification, with an electrochemical stem-loop (S-L) probe DNA detection technique. By combining these methods, we have created a system that is able to specifically amplify and detect as few as 10 copies/mu L Staphylococcus epidermidis DNA with a total time to result of 70-75 min.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC , 2020. Vol. 5, no 21, p. 12103-12109
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:kth:diva-277660DOI: 10.1021/acsomega.0c00341ISI: 000538419300024PubMedID: 32548389Scopus ID: 2-s2.0-85085747680OAI: oai:DiVA.org:kth-277660DiVA, id: diva2:1450039
Note

QC 20200630

Available from: 2020-06-30 Created: 2020-06-30 Last updated: 2022-12-07Bibliographically approved
In thesis
1. Textile and Paper Microfluidic Platforms for Electroanalytical Nucleic Acid Testing
Open this publication in new window or tab >>Textile and Paper Microfluidic Platforms for Electroanalytical Nucleic Acid Testing
2021 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Rapid and accurate near-patient diagnostic tests outside well-equipped laboratories are essential in the fight against outbreaks of infectious diseases, especially when these can turn into pandemics. As severe acute respiratory syndrome CoV 2 (SARS-CoV-2) is the latest but probably not the last pandemic of the 21st century. Nucleic acid amplification tests (NAATs) identify pathogens at the molecular level by targeting specific gene sequences. NAATs are currently the gold standard of molecular diagnostics, given their reliability, sensitivity, and specificity. In addition, NAATs can provide quantitative results with a short turnaround time compared to conventional immunoassays or culturing methods. However, most NAATs necessitate centralized laboratories and trained health professionals and, to a large extend, fail to be point-of-care(POC).The biosensing field was inspired by the micro electronics revolution in the1980s, which led to the emergence of the micro-total analysis systems (μTAS)concept. μTAS was envisioned to miniaturized laboratory-based tests in single microfluidic devices. The combination of POC NAATs with μTAS can offer rapid, sensitive, and specific diagnostic tools of great importance in tackling diseases.In this thesis, we have utilized paper and textile materials as a platform for developing μTAS. These materials possess many features necessary for advanced μTAS, such as the ability to transport liquids, store reagents and embed electronic functions, making them ideal for integrating affordable, portable, and easy to manufacture μTAS for NAATs.We have specially developed NAATs with paper-based and thread-based electrochemical readout to provide quantitative responses with high sensitivity, specificity, and the possibility to connect to portable digital electronics. This work paves the way for robust sample-to-answer digital POC NAATs.

Abstract [sv]

Snabba och noggranna diagnostiska tester som utförs nära patienten utanför välutrustade laboratorier är det mest avgörande sättet att ta itu med smittsamma sjukdomar, som i värsta fall kan förvandlas till en pandemi.Severe acute respiratory syndrome coronavirus 2 (SARS-CoV2) är den senaste men förmodligen inte den sista pandemin under 2000-talet.Nukleinsyraamplifieringstest (NAAT) identifierar patogener på en molekylär nivå genom att rikta in på specifika gensekvenser. NAAT är för tillfället den gyllene standarden för molekylär diagnostisk teknik med tanke på desstillförlitlighet, känslighet, och specificitet Utöver detta ger NAAT kvantitativa resultat med en kort behandlingstid i motsats till konventionella immunanalyser eller odlingsmetoder. De flesta NAAT-metoder kräver dock centraliserade laboratorier och utbildad personal och är därmed inte anpassade för självtest nära patienten.Biosensorsfältet var inspirerat av mikroelektronikrevolutionen på 1980-talet, vilket ledde till uppkomsten av konceptet mikrototalanalyssystem(μTAS). Dessa system har som syfte att miniatyrisera laboratoriebaserade tester genom att utföra alla steg i enstaka mikrofluidanordningar.Kombineringen av patientnära NAAT-tester med μTAS kan därför erbjuda snabba, känsliga och specifika diagnostikverktyg och därmed ha stor påverkan för att förhindra överföring av infektionssjukdomar. I den här avhandlingen har vi använt papper och textila material som en platform utveckling av μTAS.Dessa material har många egenskaper som är nödvändiga för μTAS såsom förmågan att transportera vätskor, lagra reagenser och att integrera elektroniska funktioner, vilket gör dem ideala för att integrera prisvärda, bärbara och lättillverkade μTAS för NAAT-tester. Vi har speciellt utvecklat NAAT-tekniker med papper- och trådbaserad elektrokemisk avläsning som ger kvantitativa svar med hög känslighet,specificitet och möjlighet att ansluta till bärbara elektroniska enheter. Detta arbete banar vägen för robusta, digitala och patientnära prov-till-svar-tester som baseras på NAAT-teknik.

Place, publisher, year, edition, pages
Stockholm, Sweden: KTH Royal Institute of Technology, 2021. p. 61
Series
TRITA-CBH-FOU ; 2021:33
National Category
Medical Biotechnology (with a focus on Cell Biology (including Stem Cell Biology), Molecular Biology, Microbiology, Biochemistry or Biopharmacy)
Research subject
Fibre and Polymer Science
Identifiers
urn:nbn:se:kth:diva-302471 (URN)
Public defence
2021-10-18, Kollegiesalen, Brinellvägen 8, KTH, Stockholm, 14:00 (English)
Opponent
Supervisors
Funder
EU, European Research Council, 715268
Note

QC 2021-09-24

Available from: 2021-09-24 Created: 2021-09-24 Last updated: 2022-10-31Bibliographically approved

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Khaliliazar, ShirinOuyang, LiangqiPiper, AndrewChondrogiannis, GeorgiosHanze, MartinHerland, AnnaHamedi, Mahiar

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