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Related Concept Videos

Preparation of Samples for Electron Microscopy01:20

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To be visualized by an electron microscope, either transmission or scanning, biological samples need to be fixed (stabilized) so the electron beam does not destroy them and dried thoroughly (desiccated/dehydrated) so the vacuum does not affect them. Fixation needs to be done as quickly as possible because the sample properties will start changing as soon as it is removed from its natural environment. For example, in a tissue sample, the oxygen levels begin decreasing, causing an altered...
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Sample preparation is an essential step in the analytical process. It involves preparing a sample so that it can be analyzed accurately. The goal is to extract the analyte, the substance you want to measure, from the sample while removing any components that may interfere with the analysis. Sample preparation techniques vary depending on the physical state of the sample.
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Nanodiamond for Sample Preparation in Proteomics.

Felipe Perona Martinez1, Andreas Nagl1, Sona Guluzade1

  • 1Groningen University, University Medical Center Groningen , Antonius Deusinglaan 1 , 9713 AW Groningen , The Netherlands.

Analytical Chemistry
|July 11, 2019
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Summary

This study introduces a simple nanodiamond-based method to deplete high-abundance proteins in blood plasma. This technique significantly improves the detection of low-abundance disease biomarkers, even those missed by advanced chromatography.

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Area of Science:

  • Biochemistry
  • Proteomics
  • Nanotechnology

Background:

  • Protein analysis in blood plasma is hindered by vast differences in protein abundance.
  • High-abundance proteins can mask the detection of low-abundance disease markers.

Purpose of the Study:

  • To develop a simple method for depleting high-abundance proteins in serum.
  • To enhance the detection sensitivity of low-abundance disease biomarkers.

Main Methods:

  • Utilized selective binding of serum proteins to nanodiamond surfaces for depletion.
  • Performed proof-of-principle experiments to validate the method's efficacy.

Main Results:

  • Achieved detection of proteins at concentrations as low as 400 pg/mL after a single depletion step.
  • Identified numerous disease biomarkers, including those for cancer, cardiovascular diseases, and Alzheimer's disease.
  • The nanodiamond method detected biomarkers missed by state-of-the-art ultrahigh-performance liquid chromatography.

Conclusions:

  • Nanodiamond-based protein depletion offers a simple yet powerful approach for biomarker discovery.
  • This method significantly enhances the detection of low-abundance proteins in complex biological samples.
  • The technique shows promise for improving early disease diagnosis through more comprehensive proteomic analysis.