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Optimized Protocol for the Extraction of Proteins from the Human Mitral Valve
Published on: June 14, 2017
Proteomic Profiling of RHD-Related Mitral Annulus Calcification Enabled by Magnetic Carbon Nanomaterial-Supported
Zhichao Yan1, Junyu Zhai2, Qiyue Ge3
1Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China.
Insights
This study introduces a rapid enzymatic digestion method for proteomic analysis of rheumatic heart disease (RHD) with mitral annulus calcification (MAC). It identified key genes and pathways involved in RHD progression, aiding in diagnosis and therapy.
Area of Science:
- Cardiovascular Proteomics
- Biomaterial-Assisted Enzymatic Digestion
- Rheumatic Heart Disease Pathogenesis
Background:
- Rheumatic heart disease (RHD) with mitral annulus calcification (MAC) requires understanding its mechanisms for biomarker discovery and targeted therapies.
- Proteomic analysis is crucial for clarifying RHD and cardiac valve calcification pathogenesis by examining protein expression.
- Efficient enzymatic digestion methods are essential for high-performance proteomic analysis.
Purpose of the Study:
- To develop a rapid and efficient enzymatic digestion technology for proteomic analysis.
- To investigate the molecular mechanisms and pathological progression of RHD with MAC.
- To identify potential diagnostic biomarkers and therapeutic targets for RHD complicated with MAC.
Main Methods:
- Development of quasi-immobilized enzyme digestion (QIED) technology using honeycomb-like magnetic carbon material (Fe3C@C-650).
- Application of QIED for rapid enzymatic digestion (5 minutes) of mitral valve tissue samples.
- Proteomic analysis of 7 patient mitral valve tissues to identify proteins and pathways.
Main Results:
- Identified 3128 proteins from mitral valve tissues.
- Clarified the three-phase pathological progression (calcified, thickened, normal) of RHD-related calcification.
- Revealed core hub genes (e.g., CXCL12, SRC, VCAM1) and the synergistic pathway of 'inflammation regulation-protein translation-cell remodeling'.
Conclusions:
- The developed QIED technology offers a time-saving and high-efficiency method for proteomic analysis.
- The study provides insights into the molecular mechanisms and pathological progression of RHD with MAC.
- Identified molecular targets and methodological support for precise diagnosis and targeted therapy of RHD complicated with MAC.
Abstract:
Elucidating the mechanisms underlying rheumatic heart disease (RHD) accompanied by mitral annulus calcification (MAC) facilitates the identification of sensitive diagnostic biomarkers and the development of targeted therapeutic strategies. Proteomic analysis offers an approach to characterizing protein expression changes, thereby contributing to the clarification of pathogenesis in both RHD and cardiac valve calcification. Time-saving and high-efficiency enzymatic digestion methods are thus highly desirable for reliable and high-performance proteomic analysis. This study developed a quasi-immobilized enzyme digestion (QIED) technology based on honeycomb-like magnetic carbon material (Fe3C@C-650) with a pore size of 100-150 nm, which enables rapid enzymatic digestion in 5 min (200-fold faster than traditional methods) by ultrahigh enzyme adsorption capability. The developed method was applied to proteomic analysis of mitral valve tissues from 7 patients, and 3128 proteins were identified, which clarified the three-phase pathological progression (calcified, thickened, and normal tissues) of RHD-related calcification and revealed core hub genes (e.g., CXCL12, SRC, VCAM1) and the synergistic pathway of "inflammation regulation-protein translation-cell remodeling". This study provides methodological support and molecular targets for the precise diagnosis and targeted therapy of RHD complicated with MAC.
