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Low Molecular Weight Protein Enrichment on Mesoporous Silica Thin Films for Biomarker Discovery

Low Molecular Weight Protein Enrichment on Mesoporous Silica Thin Films for Biomarker Discovery

Published on: April 17, 2012

Two-dimensional nitrosylated protein fingerprinting by using poly (methyl methacrylate) microchips.

Siyang Wang¹, Samuel K Njoroge, Katrina Battle

¹Department of Biomedical Engineering, Louisiana Tech University, Ruston, USA.

|July 7, 2012

Summary

This study introduces a novel microfluidic technique for separating nitrosylated proteins, crucial biomarkers for aging and Alzheimer

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Last Updated: May 20, 2026

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Nitropeptide Profiling and Identification Illustrated by Angiotensin II

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Published on: June 16, 2019

Area of Science:

Biochemistry
Analytical Chemistry
Neuroscience

Background:

S-nitrosylation is a critical post-translational modification of cysteine involved in cellular signaling.
Nitrosylated proteins serve as biomarkers for aging and Alzheimer's disease (AD).
Microfluidics offers advanced tools for complex protein mixture separations.

Purpose of the Study:

To develop and demonstrate a two-dimensional micro-electrophoresis (2D μ-CE) method for separating nitrosylated proteins.
To profile nitrosylated proteins in human cells and AD mouse models for biomarker discovery.

Main Methods:

Utilized two-dimensional micro-electrophoresis (2D μ-CE) combining SDS micro-capillary gel electrophoresis (SDS μ-CGE) and microemulsion electrokinetic chromatography (MEEKC).
Separated nitrosylated proteins from HT-29 cells and AD transgenic mice brain tissues.
Generated 3D landscape images and protein fingerprints for biomarker profiling.

Main Results:

Successfully resolved five standard proteins by molecular weight using the 2D μ-CE system.
Presented high peak capacity 3D landscape of nitrosylated proteins in HT-29 cells, showing changes after oxidative stress induction.
Generated nitrosylated protein fingerprints from AD transgenic mice brains, differentiating from controls.

Conclusions:

This 2D μ-CE method provides a novel approach for the 2D profiling of nitrosylated proteins on a microchip.
The technique demonstrates potential for rapid screening and early detection of Alzheimer's disease biomarkers.
This microfluidic approach advances the analysis of post-translational modifications in complex biological samples.