kth.sePublications KTH
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Textile and Paper Microfluidic Platforms for Electroanalytical Nucleic Acid Testing
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Fibre Technology. KTH.ORCID iD: 0000-0001-7002-1382
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: urn:nbn:se:kth:diva-302471OAI: oai:DiVA.org:kth-302471DiVA, id: diva2:1597084
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
List of papers
1. Nitrocellulose-bound achromopeptidase for point-of-care nucleic acid tests
Open this publication in new window or tab >>Nitrocellulose-bound achromopeptidase for point-of-care nucleic acid tests
Show others...
2021 (English)In: Scientific Reports, E-ISSN 2045-2322, Vol. 11, no 1, article id 6140Article in journal (Refereed) Published
Abstract [en]

Enzymes are the cornerstone of modern biotechnology. Achromopeptidase (ACP) is a well-known enzyme that hydrolyzes a number of proteins, notably proteins on the surface of Gram-positive bacteria. It is therefore used for sample preparation in nucleic acid tests. However, ACP inhibits DNA amplification which makes its integration difficult. Heat is commonly used to inactivate ACP, but it can be challenging to integrate heating into point-of-care devices. Here, we use recombinase polymerase amplification (RPA) together with ACP, and show that when ACP is immobilized on nitrocellulose paper, it retains its enzymatic function and can easily and rapidly be activated using agitation. The nitrocellulose-bound ACP does, however, not leak into the solution, preventing the need for deactivation through heat or by other means. Nitrocellulose-bound ACP thus opens new possibilities for paper-based Point-of-Care (POC) devices.

Place, publisher, year, edition, pages
Springer Nature, 2021
National Category
Biological Sciences
Identifiers
urn:nbn:se:kth:diva-292300 (URN)10.1038/s41598-021-85481-2 (DOI)000630510600002 ()33731748 (PubMedID)2-s2.0-85102733962 (Scopus ID)
Note

QC 20210406

Available from: 2021-04-06 Created: 2021-04-06 Last updated: 2022-11-03Bibliographically approved
2. Electrochemical Detection of Genomic DNA Utilizing Recombinase Polymerase Amplification and Stem-Loop Probe
Open this publication in new window or tab >>Electrochemical Detection of Genomic DNA Utilizing Recombinase Polymerase Amplification and Stem-Loop Probe
Show others...
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
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:kth:diva-277660 (URN)10.1021/acsomega.0c00341 (DOI)000538419300024 ()32548389 (PubMedID)2-s2.0-85085747680 (Scopus ID)
Note

QC 20200630

Available from: 2020-06-30 Created: 2020-06-30 Last updated: 2022-12-07Bibliographically approved
3. Woven Electroanalytical Biosensor for Nucleic AcidAmplification Tests
Open this publication in new window or tab >>Woven Electroanalytical Biosensor for Nucleic AcidAmplification Tests
Show others...
2021 (English)In: Advanced Healthcare Materials, ISSN 2192-2640, E-ISSN 2192-2659, Vol. 10, no 11, p. 2100034-Article in journal (Refereed) [Artistic work] Published
Abstract [en]

Fiber-based biosensors enable a new approach in analytical diagnosticdevices. The majority of textile-based biosensors, however, rely oncolorimetric detection. Here a woven biosensor that integrates microfluidicsstructures in combination with an electroanalytical readout based on athiol-self-assembled monolayer (SAM) for Nucleic Acid Amplification Testing,NAATs is shown. Two types of fiber-based electrodes are systematicallycharacterized: pure gold microwires (bond wire) and off-the-shelf plasmagold-coated polyester multifilament threads to evaluate their potential to formSAMs on their surface and their electrochemical performance in woven textile.A woven electrochemical DNA (E-DNA) sensor using a SAM-based stem-loopprobe-modified gold microwire is fabricated. These sensors can specificallydetect unpurified, isothermally amplified genomic DNA of Staphylococcusepidermidis (10 copies/μL) by recombinase polymerase amplification (RPA).This work demonstrates that textile-based biosensors have the potential forintegrating and being employed as automated, sample-to-answer analyticaldevices for point-of-care (POC) diagnostics.

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2021
Keywords
Woven electroanalytical microfluidic devices, DNA biosensors, Fiber electrodes, Self assembled monolayers (SAM)
National Category
Analytical Chemistry
Identifiers
urn:nbn:se:kth:diva-301909 (URN)10.1002/adhm.202100034 (DOI)000645682300001 ()33930257 (PubMedID)2-s2.0-85105138834 (Scopus ID)
Funder
EU, European Research Council
Note

QC 20210917

Available from: 2021-09-14 Created: 2021-09-14 Last updated: 2022-12-07Bibliographically approved
4. Electroanalytical Paper based Nucleic Acid Amplification Tests with Integrated Thread Electrodes
Open this publication in new window or tab >>Electroanalytical Paper based Nucleic Acid Amplification Tests with Integrated Thread Electrodes
(English)Article in journal (Refereed) [Artistic work] Submitted
National Category
Natural Sciences
Identifiers
urn:nbn:se:kth:diva-302112 (URN)
Funder
EU, European Research Council
Note

QC 20210923

Available from: 2021-09-16 Created: 2021-09-16 Last updated: 2022-11-03Bibliographically approved

Open Access in DiVA

fulltext(4058 kB)296 downloads
File information
File name FULLTEXT01.pdfFile size 4058 kBChecksum SHA-512
bf01a05e53dde198ad1625f13358c8ec92a297a01b280907940408572a4473189ce7219074a0bfe5e43a918a58cddcaa41ce1b994f789c5cf5961c0ae21d04cd
Type fulltextMimetype application/pdf

Authority records

Khaliliazar, Shirin

Search in DiVA

By author/editor
Khaliliazar, Shirin
By organisation
Fibre Technology
Medical Biotechnology (with a focus on Cell Biology (including Stem Cell Biology), Molecular Biology, Microbiology, Biochemistry or Biopharmacy)

Search outside of DiVA

GoogleGoogle Scholar
Total: 296 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 701 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf