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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Nanoporous silk films with capillary action and size-exclusion capacity for sensitive glucose determination in whole blood

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Marquez, Augusto [1] ; Santos, Moliria V. [2] ; Guirado, Gonzalo [3] ; Moreno, Alex [1] ; Aznar-Cervantes, Salvador D. [4] ; Cenis, Jose Luis [4] ; Santagneli, Silvia H. [5] ; Dominguez, Carlos [1] ; Omenetto, Fiorenzo G. [6, 7, 8, 9] ; Munoz-Berbel, Xavier [1]
Total Authors: 10
[1] CSIC, CNM, Inst Microelect Barcelona IMB, Barcelona 08193 - Spain
[2] Univ Sao Paulo, Sao Carlos Inst Phys, Sao Carlos, SP - Brazil
[3] Univ Autonoma Barcelona, Dept Quim, Bellaterra 08193, Barcelona - Spain
[4] Inst Murciano Invest & Desarrollo Agr & Alimentar, La Alberca 30150, Murcia - Spain
[5] Sao Paulo State Univ UNESP, Inst Chem, BR-14801970 Araraquara, SP - Brazil
[6] Tufts Univ, Dept Phys, Medford, MA 02155 - USA
[7] Tufts Univ, Dept Biomed Engn, Silklab, Medford, MA 02155 - USA
[8] Tufts Univ, Dept Elect & Comp Engn, Medford, MA 02155 - USA
[9] Tufts Univ, Lab Living Devices, Medford, MA 02155 - USA
Total Affiliations: 9
Document type: Journal article
Source: LAB ON A CHIP; v. 21, n. 3, p. 608-615, FEB 7 2021.
Web of Science Citations: 0

In optical biosensing, silk fibroin (SF) appears as a promising alternative where other materials, such as paper, find limitations. Besides its excellent optical properties and unmet capacity to stabilize biomacromolecules, SF in test strips exhibits additional functions, i.e. capillary pumping activity of 1.5 mm s(-1), capacity to filter blood cells thanks to its small, but tuneable, porosity and enhanced biosensing sensitivity. The bulk functionalization of SF with the enzymes glucose oxidase and peroxidase and the mediator ABTS produces colourless and transparent SF films that respond to blood glucose increasing 2.5 times the sensitivity of conventional ABTS-based assays. This enhanced sensitivity results from the formation of SF-ABTS complexes, where SF becomes part of the bioassay. Additionally, SF films triple the durability of most stable cellulose-based sensors. Although demonstrated for glucose, SF microfluidic test strips may incorporate other optical bioassays, e.g. immunoassays, with the aim of transferring them from central laboratories to the place of patient's care. (AU)

FAPESP's process: 18/11039-9 - 3D printing of regenerated silk fibroin via multiphoton lithography for microfabrication of photonic devices
Grantee:Moliria Vieira dos Santos
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 16/11591-8 - Femtosecond laser micro-structuring in biopolymers of celulose and fibroin: fabrication of photonic devices
Grantee:Moliria Vieira dos Santos
Support type: Scholarships in Brazil - Post-Doctorate