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Split-and-pool Synthesis and Characterization of Peptide Tertiary Amide Library
Published on: June 20, 2014
Short pseudopeptides containing turn scaffolds with high AT2 receptor affinity
Jennie Georgsson1, Ulrika Rosenström, Charlotta Wallinder
1Department of Medicinal Chemistry, Division of Organic Pharmaceutical Chemistry, Uppsala University, PO Box 574, SE-751 23 Uppsala, Sweden.
Bioorganic & Medicinal Chemistry
|June 7, 2006
Summary
Researchers developed novel pseudopeptides targeting the angiotensin II AT2 receptor. These compounds show high affinity, suggesting potential for new therapeutic strategies in cardiovascular conditions.
Area of Science:
- Medicinal Chemistry
- Pharmacology
- Cardiovascular Research
Background:
- The angiotensin II AT2 receptor is a key target for cardiovascular therapies.
- Existing truncated Angiotensin II analogues show promise but require optimization.
- Understanding structure-activity relationships is crucial for developing potent ligands.
Purpose of the Study:
- To synthesize and characterize novel pseudopeptides based on known AT2 receptor ligands.
- To investigate the impact of structural modifications, specifically turn scaffolds and C-terminal substitutions, on AT2 receptor affinity.
- To identify potent AT2 receptor agonists for potential therapeutic applications.
Main Methods:
- Synthesis of two initial pentapeptides with AT2 receptor affinity.
- Design and synthesis of 13 pseudopeptides incorporating five different turn scaffolds.
- Pharmacological evaluation of synthesized compounds for AT2 receptor binding affinity.
- Structure-activity relationship analysis, including the effect of C-terminal amino acid substitution (Phe to Ile).
Main Results:
- Initial pentapeptides demonstrated angiotensin II AT2 receptor affinity and agonistic activity.
- Several novel pseudopeptides exhibited subnanomolar affinities for the AT2 receptor.
- Substitution of phenylalanine (Phe) with isoleucine (Ile) at the C-terminus significantly enhanced AT2 receptor affinity across the series.
- The introduction of turn scaffolds modulated receptor interactions.
Conclusions:
- The study successfully generated pseudopeptides with high affinity for the angiotensin II AT2 receptor.
- Structural modifications, particularly C-terminal elaboration, are effective strategies for enhancing AT2 receptor affinity in truncated Ang II analogues.
- These findings provide a foundation for the development of novel AT2 receptor-targeting therapeutics.
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