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Physiological proteomics: cells, organs, biological fluids, and biomarkers
1Department of Cell and Developmental Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC 29208, USA. blake@med.sc.edu
Experimental Biology and Medicine (Maywood, N.J.)
|December 13, 2005
Summary
Proteomic research uses advanced techniques like mass spectrometry to identify and quantify protein changes in various biological states. This enables the discovery of disease causes and biomarkers for clinical applications.
Area of Science:
- Biochemistry
- Molecular Biology
- Proteomics
Background:
- Proteomic research is rapidly advancing due to innovations in protein labeling, mass spectrometry (MS), and bioinformatics.
- Techniques like two-dimensional difference gel electrophoresis (2D-DIGE) coupled with MS (LC-MS/MS, MALDI-ToF MS) allow for precise quantification of protein level changes between samples.
- Current methodologies enable the identification and quantification of numerous proteins and their post-translational modifications in diverse biological samples within a single study.
Purpose of the Study:
- To compare the erythrocyte plasma membrane proteome in normal versus sickle cell states.
- To evaluate the anterior pituitary gland proteome in ovariectomized rats following estrogen treatment.
- To assess proteomic methodologies for identifying potential biomarkers in human cells and fluids for clinical medicine.
Main Methods:
- Utilizing two-dimensional difference gel electrophoresis (2D-DIGE).
- Employing liquid chromatography tandem mass spectrometry (LC-MS/MS) and/or matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-ToF MS).
- Applying database search software for protein identification and quantification.
Main Results:
- Enabled comparison of protein expression between different physiological states or experimental treatments.
- Facilitated identification of causative factors for diseases by comparing normal and diseased states.
- Demonstrated the potential for identifying biomarkers in human cells and fluids for clinical applications.
Conclusions:
- Proteomic advancements significantly enhance the ability to study biological systems and disease mechanisms.
- Comparative proteomic analyses are crucial for understanding disease pathology and discovering diagnostic biomarkers.
- Cross-disciplinary collaboration in proteomics can accelerate biological and biomedical discoveries.