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Updated: May 31, 2025

Static Adhesion Assay for the Study of Integrin Activation in T Lymphocytes
Published on: June 13, 2014
Importance of integrin transmembrane helical interactions for antagonistic versus agonistic ligand behavior:
Ute Reuning1, Vincenzo Maria D'Amore2, Kairbaan Hodivala-Dilke3
1TUM University Hospital, Klinikum Rechts der Isar, School of Medicine and Health, Technical University of Munich, Department of Gynecology and Obstetrics, Clinical Research Unit, Ismaninger Strasse 22, 81675 Munich, Germany.
Abstract:
Integrins are well-characterized receptors involved in cell adhesion and signaling. With six approved drugs, they are recognized as valuable therapeutic targets. Here, we explore potential activation mechanisms that may clarify the agonist versus antagonist behavior of integrin ligands. The reorganization of the transmembrane domain (TMD) in the integrin receptor, forming homooligomers within focal adhesions, could be key to the understanding of the agonistic properties of integrin ligands at substoichiometric concentrations. This has significant implications for medical applications. While we focus on the RGD peptide-recognizing integrin subfamily, we propose that these mechanistic insights may also apply to other integrin subtypes. For application of integrin ligands in medicine it is essential to consider this mechanism and its consequences for affinity and bioavailability.
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