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Laryngeal muscle surface receptors identified using random phage library
Paul W Flint1, Zhao Bo Li, Mohamed Lehar
1Department of Otolaryngology-Head and Neck Surgery Johns Hopkins University, Baltimore, Maryland, USA. pflint@jhmi.edu
The Laryngoscope
|December 2, 2005
Summary
Researchers identified specific peptides targeting skeletal and laryngeal muscles using phage biopanning. These findings advance targeted gene therapy by enabling modified adenoviral vectors for improved muscle gene transfer efficiency.
Area of Science:
- Molecular Biology
- Virology
- Biotechnology
Background:
- Gene transfer efficiency in mammalian muscle is crucial for therapeutic applications.
- Adenoviral vectors are promising tools for gene therapy but require targeted delivery.
- Modifying viral tropism to recognize tissue-specific antigens is a key strategy for targeted gene delivery.
Purpose of the Study:
- To identify cell-surface receptors on rat skeletal and laryngeal muscle.
- To develop targeted adenoviral vectors for improved gene transfer efficiency in mammalian muscle.
- To identify specific peptide sequences for targeting distinct muscle groups.
Main Methods:
- Utilized M-13 phage biopanning on cultured rat skeletal and laryngeal muscle cells.
- Screened phage for binding to muscle-specific surface peptides.
- Performed in vivo studies using muscle-specific phage for validation.
Main Results:
- Identified a specific peptide (YASTNPM) showing skeletal muscle binding via in vivo immunostaining.
- Achieved a 10(9)-fold increase in skeletal muscle binding with targeted phage.
- Discovered a laryngeal muscle-specific peptide (NPSQVKH) yielding a 10(7)-fold increase in laryngeal muscle phage titer.
Conclusions:
- Identified novel muscle cell-surface receptors as potential targets for adenovirus tropism modification.
- Demonstrated phage specificity for skeletal and laryngeal muscles, indicating potential for targeted gene therapy in specific muscle groups.