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Quantitative PCR-based approach for rapid phage display analysis: a foundation for high throughput vascular proteomic
Victoria L T Ballard1, Jacquelyne M Holm, Jay M Edelberg
1Department of Medicine and Department of Cell and Developmental Biology, Weill Medical College of Cornell University, New York, New York 10021, USA.
Physiological Genomics
|May 18, 2006
Summary
This study introduces quantitative PCR (Q-PCR) for rapid phage binding quantification in vivo. This method identifies age-associated cardiac vascular epitopes, offering a faster alternative to traditional proteomic profiling.
Area of Science:
- Proteomics
- Molecular Biology
- Cardiovascular Research
Background:
- Functional proteomic strategies identify bioactive peptides, surpassing current molecular array limitations.
- In vivo phage display is suitable for vascular endothelium proteomic assessment but is hindered by slow enrichment and sequencing.
- High-throughput molecular profiling requires faster, more efficient methods for analyzing phage-tissue interactions.
Purpose of the Study:
- To develop a quantitative PCR (Q-PCR) strategy for rapid quantification of in vivo phage binding.
- To assess age-associated changes in cardiac vascular epitopes using Q-PCR.
- To establish a high-throughput method for analyzing phage binding in proteomic applications.
Main Methods:
- Designed Q-PCR primers for specific phage clones selected from a defined pool.
- Tested and confirmed primer sensitivity and specificity in vitro.
- Quantified in vivo phage binding to cardiac vasculature in young versus old subjects.
Main Results:
- Q-PCR successfully quantified in vivo phage binding within hours of injection.
- Phage clones showed preferential homing to young cardiac vasculature over old.
- Q-PCR results strongly correlated with traditional bacterial-based titration methods.
Conclusions:
- Q-PCR offers a rapid, high-throughput method for quantifying in vivo phage binding.
- This approach facilitates the proteomic mapping of vascular beds and other tissues.
- The Q-PCR strategy complements nonbiased phage display methods for molecular profiling.
