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Patterned Carboxymethyl-Dextran Functionalized Surfaces Using Organic Mixed Monolayers for Biosensing Applications.

Elena Ambrosetti1, Martina Conti2, Ana I Teixeira1

  • 1Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm 171 77, Sweden.

ACS Applied Bio Materials
|June 27, 2022
PubMed
Summary
This summary is machine-generated.

We developed a cost-effective method for creating patterned carboxymethyl-dextran (CMD) surfaces for biomolecule immobilization. These surfaces enhance biosensing by improving molecular recognition and assay performance.

Keywords:
binding bioassaycarboxymethyl-dextranpatterned surfacesprotein anchoringsurface plasmon resonance

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Area of Science:

  • Biomaterials Science
  • Surface Chemistry
  • Bioanalytical Chemistry

Background:

  • Biomolecule deposition is crucial for biosensor sensitivity and selectivity.
  • Controlling surface-biomolecule interactions optimizes assay performance.
  • Carboxymethyl-dextran (CMD) coatings offer hydrophilic, bioinert surfaces for protein immobilization.

Purpose of the Study:

  • To develop and optimize a cost-effective technique for producing CMD-based patterned surfaces.
  • To enable efficient biomolecule immobilization for bioanalytical platforms.
  • To validate the patterned surfaces using a chemiluminescence assay.

Main Methods:

  • Fabrication of silicon or glass substrates with patterned bioactive CMD areas using hydrophilic/hydrophobic patterning.
  • Utilizing low-cost instruments and techniques compatible with large-scale production.
  • Validation via a chemiluminescence assay for DNA nanoassembly binding to immobilized proteins.

Main Results:

  • Demonstrated high reproducibility and selectivity in molecular recognition.
  • Characterized protein reactivity on patterned CMD surfaces and compared it to surface plasmon resonance (SPR) surfaces.
  • Achieved results consistent with those obtained on model CMD-based SPR sensor surfaces.

Conclusions:

  • The developed approach is straightforward, cost-effective, and suitable for large-scale production.
  • Patterned CMD surfaces provide efficient biomolecule confinement and immobilization.
  • This method enables the assessment of functionalized surfaces for advanced bioanalytical platforms.