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Enrichment of Extracellular Matrix Proteins from Tissues and Digestion into Peptides for Mass Spectrometry Analysis
Published on: July 23, 2015
Proteomic analysis of exfoliation deposits
Boris Ovodenko1, Agueda Rostagno, Thomas A Neubert
1Department of Ophthalmology, New York Eye and Ear Infirmary, New York, NY, USA.
Investigative Ophthalmology & Visual Science
|March 29, 2007
Summary
Proteomic analysis reveals novel components in exfoliation material (XFM), enhancing understanding of exfoliation syndrome (XFS) pathogenesis. This study identifies new molecules contributing to the complex XFM deposits.
Area of Science:
- Ophthalmology
- Biochemistry
- Proteomics
Background:
- Exfoliation syndrome (XFS) is characterized by the accumulation of exfoliation material (XFM) in the anterior eye.
- The precise biochemical composition of XFM is not fully understood, hindering insights into XFS pathogenesis.
Purpose of the Study:
- To elucidate the comprehensive biochemical makeup of lenticular exfoliation material (XFM).
- To identify novel protein and molecular components within XFM using advanced proteomic techniques.
Main Methods:
- Utilized proteomic approaches, including mass spectrometry (MS), on anterior lens capsules from XFS and control patients.
- Employed cyanogen bromide (CNBr) cleavage, trypsin and elastase digestion, and liquid chromatography-tandem MS for peptide analysis.
- Performed immunohistochemistry to confirm the localization of identified components in XFM.
Main Results:
- Identified known extracellular matrix components (e.g., fibronectin, laminin) and novel molecules in XFM.
- Discovered clusterin, TIMP-3, fibulin-2, desmocollin-2, syndecan-3, versican, ADAM metalloproteases, and C1q within XFM.
- Immunohistochemistry confirmed the presence and location of these identified components in XFM.
Conclusions:
- The study highlights the intricate composition of XFM, revealing previously unrecognized molecular constituents.
- The novel solubilization and proteomic strategy provides new avenues for investigating XFS molecular mechanisms.
- Findings contribute to a deeper understanding of XFS pathogenesis and disease progression.
