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Shifting Towards αV β6 Integrin Ligands Using Novel Aminoproline-Based Cyclic Peptidomimetics
Kelly Bugatti1, Agostino Bruno1, Daniela Arosio2
1Dipartimento di Scienze degli Alimenti e del Farmaco, Università di Parma, Parco Area delle Scienze 27A, 43124, Parma, Italy.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|July 8, 2020
Summary
Researchers developed new small-molecule probes targeting alpha-V beta-6 (αV β6) integrins, crucial in various diseases. Four promising candidates showed high selectivity for αV β6 over αV β3 integrins, advancing targeted therapies.
Area of Science:
- Medicinal Chemistry
- Molecular Biology
- Drug Discovery
Background:
- Integrins, particularly αV β3 and αV β6, are implicated in critical physiological and pathological processes.
- Selective small-molecule probes for integrins are essential for understanding their roles and developing targeted therapeutics.
- Previous aminoproline (Amp)-RGD cyclopeptidomimetics showed promise for αV β3 integrin targeting.
Purpose of the Study:
- To design and synthesize novel aminoproline (Amp)-RGD chemotypes for selective targeting of αV β6 integrins.
- To evaluate the binding affinity and selectivity of new compounds against αV β6 and αV β3 integrins.
- To identify key structural features contributing to the observed activity and selectivity through structure-activity relationship (SAR) studies and docking simulations.
Main Methods:
- Synthesis of 18 new AmpRGD chemotypes with structural variations.
- Evaluation of ligand competence using competitive binding assays on isolated receptors.
- Determination of αV β6 /αV β3 integrin selectivity for selected compounds.
- Structure-activity relationship (SAR) analysis and molecular docking simulations.
Main Results:
- Successful synthesis of 18 novel AmpRGD-based compounds.
- Identification of four highly promising candidates with significant αV β6 integrin binding.
- Demonstrated high selectivity of these candidates for αV β6 over αV β3 integrins.
- SAR and docking studies elucidated critical structural determinants for activity and selectivity.
Conclusions:
- The developed AmpRGD chemotypes represent a significant advancement in the pursuit of selective αV β6 integrin-targeted binders.
- The identified lead compounds hold potential for further development as therapeutic agents for diseases involving αV β6 integrin dysregulation.
- The study provides valuable insights into the molecular interactions governing integrin recognition by small molecules.
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