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Dagher MC, Ersayin A, Seyve L, Castellan M, Moreau C, Choisnard L, Thielens N, Marlu R, Polack B, Thomas A. Toward non-factor therapy in hemophilia: an antithrombin insensitive Gla-domainless factor Xa as tissue factor pathway inhibitor bait. Res Pract Thromb Haemost 2023; 7:102175. [PMID: 37841511 PMCID: PMC10568284 DOI: 10.1016/j.rpth.2023.102175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 07/24/2023] [Accepted: 08/06/2023] [Indexed: 10/17/2023] Open
Abstract
Background Gla-domainless factor (F) Xa (GD-FXa) was proposed as a trap to endogenous anticoagulant tissue factor pathway inhibitor (TFPI) to restore thrombin generation in hemophilia. Using computational chemistry and experimental approaches, we previously showed that S195A GD-FXa also binds TFPI and restores ex vivo coagulation in plasma obtained from person(s) with hemophilia. Methods To design a GD-FXa variant with improved anti-TFPI affinity, we performed molecular dynamics simulations and identified suitable sites for mutagenesis. The calculations identified residues R150FXa and K96Fxa as cold-spots of interaction between GD-FXa and the K2 domain of TFPI. In the three-dimensional model, both residues face toward TFPI hydrophobic residues and are thus potential candidates for mutagenesis into hydrophobic residues to favor an improved protein-protein interaction. Results Catalytically inactive GD-FXa variants containing the S195A mutation and the additional mutations K96Y, R150I, R150G, R150F, and K96YR150F, were produced to experimentally confirm these computational hypotheses. Among these mutants, the R150FFXa and the K96YR150FFXa were slightly more effective than S195A GD-FXa in restoring coagulation in FVIII deficient plasmas. However, in surface plasmon resonance experiments, they showed TFPI binding affinities in the same range and acted similarly as S195A GD-FXa in FXa/TFPI competition assays. In contrast, the R150 mutants completely lost their interactions with antithrombin as observed in the surface plasmon resonance experiments. Conclusions We therefore conclude that their antithrombin resistance is responsible for their improved thrombin generation, through an extension of their half-lives.
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Affiliation(s)
- Marie-Claire Dagher
- Univ. Grenoble Alpes, UMR5525, CNRS, TIMC, Grenoble, France
- Univ. Grenoble Alpes, UMR5075, CEA, CNRS, IBS, Grenoble, France
| | - Atanur Ersayin
- Univ. Grenoble Alpes, UMR5525, CNRS, TIMC, Grenoble, France
| | - Landry Seyve
- Haemostasis Unit, Hematology Laboratory, University Grenoble Hospital, Grenoble Alpes University, Grenoble, France
| | | | - Cyril Moreau
- Univ. Grenoble Alpes, UMR5525, CNRS, TIMC, Grenoble, France
| | - Luc Choisnard
- Univ. Grenoble Alpes, UMR5063, ICMG FR 2607, CNRS, Département de Pharmacochimie Moléculaire, Grenoble, France
| | - Nicole Thielens
- Univ. Grenoble Alpes, UMR5075, CEA, CNRS, IBS, Grenoble, France
| | - Raphaël Marlu
- Univ. Grenoble Alpes, UMR5525, CNRS, TIMC, Grenoble, France
- Haemostasis Unit, Hematology Laboratory, University Grenoble Hospital, Grenoble Alpes University, Grenoble, France
| | - Benoît Polack
- Univ. Grenoble Alpes, UMR5525, CNRS, TIMC, Grenoble, France
| | - Aline Thomas
- Univ. Grenoble Alpes, UMR5063, ICMG FR 2607, CNRS, Département de Pharmacochimie Moléculaire, Grenoble, France
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Ersayin A, Thomas A, Seyve L, Thielens N, Castellan M, Marlu R, Polack B, Dagher MC. Catalytically inactive Gla-domainless factor Xa binds to TFPI and restores ex vivo coagulation in hemophilia plasma. Haematologica 2017; 102:e483-e485. [PMID: 28983056 DOI: 10.3324/haematol.2017.174037] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Atanur Ersayin
- University of Grenoble Alpes, CNRS, CHU Grenoble Alpes, Grenoble INP, TIMC-IMAG, Institute of Engineering, University Grenoble Alpes, Grenoble, France
| | - Aline Thomas
- University of Grenoble Alpes, CNRS, DPM, Grenoble, France
| | - Landry Seyve
- University of Grenoble Alpes, CNRS, CHU Grenoble Alpes, Grenoble INP, TIMC-IMAG, Institute of Engineering, University Grenoble Alpes, Grenoble, France
| | - Nicole Thielens
- University of Grenoble Alpes, CEA, CNRS, IBS, Grenoble, France
| | - Mathieu Castellan
- University of Grenoble Alpes, CNRS, CHU Grenoble Alpes, Grenoble INP, TIMC-IMAG, Institute of Engineering, University Grenoble Alpes, Grenoble, France
| | - Raphaël Marlu
- University of Grenoble Alpes, CNRS, CHU Grenoble Alpes, Grenoble INP, TIMC-IMAG, Institute of Engineering, University Grenoble Alpes, Grenoble, France
| | - Benoît Polack
- University of Grenoble Alpes, CNRS, CHU Grenoble Alpes, Grenoble INP, TIMC-IMAG, Institute of Engineering, University Grenoble Alpes, Grenoble, France
| | - Marie-Claire Dagher
- University of Grenoble Alpes, CNRS, CHU Grenoble Alpes, Grenoble INP, TIMC-IMAG, Institute of Engineering, University Grenoble Alpes, Grenoble, France
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