Related Experiment Video
Updated: Aug 14, 2026
07:32
Screening and Identification of Small Peptides Targeting Fibroblast Growth Factor Receptor2 using a Phage Display Peptide Library
Published on: September 30, 2019
Characterization of prostate-specific antigen binding peptides selected by phage display technology
Catherine Ferrieu-Weisbuch1, Sandrine Michel, Emilie Collomb-Clerc
1Unité Mixte de Recherche UMR 2714 CNRS-bioMérieux, IFR 128 BioSciences Lyon-Gerland, 21 Avenue Tony Garnier, 69365 LYON Cedex 07, France.
Journal of Molecular Recognition : JMR
|November 29, 2005
Summary
Researchers developed new peptides that specifically recognize prostate-specific antigen (PSA) forms linked to prostate cancer. These PSA-binding peptides show potential for improved diagnosis and management of prostate cancer.
Area of Science:
- Biochemistry
- Molecular Biology
- Oncology
Background:
- Prostate-specific antigen (PSA) is a key biomarker for prostate cancer diagnosis and management.
- Free PSA cleavage patterns differ between benign prostatic hyperplasia and prostate cancer.
- Previous studies identified enzymatically activatable PSA in prostate cancer patients' sera.
Purpose of the Study:
- To develop novel ligands for specific recognition of different PSA forms, including active PSA.
- To identify peptides that can differentiate between PSA forms associated with prostate cancer.
Main Methods:
- Screening of phage-displayed peptide libraries against PSA.
- Selection and synthesis of PSA-recognizing peptides.
- Characterization of peptide-PSA interactions using alanine scanning and Spotscan analysis.
- Assessment of peptide effects on PSA enzymatic activity.
Main Results:
- Four phage clones yielding PSA-specific peptides were selected.
- Synthesized peptides specifically capture and detect free PSA in biological samples.
- Peptide binding involves aromatic and hydrophobic residues, with one peptide targeting the kallikrein loop (residues 82-87).
- Peptides modulate PSA enzymatic activity differently depending on immobilization or solution state.
Conclusions:
- Developed PSA-specific peptides can recognize unique PSA forms.
- These peptides show potential as diagnostic tools for prostate cancer.
- Further research may lead to improved methods for prostate cancer detection and management.
