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Related Concept Videos

DNA Microarrays02:34

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...

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A Guided Materials Screening Approach for Developing Quantitative Sol-gel Derived Protein Microarrays
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Published on: August 26, 2013

Quantification of protein immobilization on substrates for cellular microarray applications.

Santiago A Rodríguez-Seguí1, José Ignacio Pons Ximénez, Lídia Sevilla

  • 1Nanobioengineering group, Institute for Bioengineering of Catalonia, Baldiri i Reixac 10-12, 08028 Barcelona, Spain. sarodris@clinic.ub.es

Journal of Biomedical Materials Research. Part A
|June 1, 2011
PubMed
Summary
This summary is machine-generated.

Chemically activated surfaces are best for immobilizing proteins in cellular microarrays, outperforming nonfouling surfaces like Poly ethylene oxide (PEO) films. Glycerol addition negatively impacts protein retention on all tested substrates.

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Area of Science:

  • Biotechnology
  • Surface Chemistry
  • Cellular Microarrays

Background:

  • Cellular microarrays represent an advancement over DNA and protein microarrays.
  • Selecting appropriate surface chemistry is crucial for effective protein immobilization and preventing unwanted cell adhesion.
  • A key challenge lies in balancing nonfouling properties with sufficient protein retention.

Purpose of the Study:

  • To quantitatively assess protein immobilization on various substrates for cellular microarrays.
  • To evaluate the impact of surface chemistry and glycerol on protein retention.
  • To identify optimal surface conditions for immobilizing extracellular matrix (ECM) proteins and other factors.

Main Methods:

  • Microspotting of fluorescently labeled fibronectin (Fn*) and streptavidin (SA*) on chemically activated surfaces and Poly ethylene oxide (PEO) films.
  • Assaying protein immobilization with and without glycerol in the printing buffer.
  • Quantitative assessment of retained protein amounts on different substrates.

Main Results:

  • Fibronectin (Fn*) was retained by all tested surfaces, with PEO films showing lower immobilization.
  • Streptavidin (SA*) was primarily retained by chemically activated surfaces.
  • Glycerol significantly decreased the immobilization of both Fn* and SA* across all surfaces.
  • Chemically activated surfaces demonstrated superior retention of immobilized proteins.

Conclusions:

  • Chemically activated surfaces are recommended for protein immobilization in cellular microarray applications.
  • These surfaces are particularly advantageous when co-spotting ECM proteins with smaller, less retentive factors.
  • Surface chemistry plays a critical role in the success of cellular microarray fabrication and function.