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Characterization of binding, functional activity, and contractile responses of the selective 5-HT1F receptor agonist lasmiditan
- Source :
- British Journal of Pharmacology, British Journal of Pharmacology, 176(24), 4681-4695. Wiley-Blackwell
- Publication Year :
- 2019
-
Abstract
- Background and Purpose: Triptans are 5-HT1B/1D receptor agonists (that also display 5-HT1F receptor affinity) with antimigraine action, contraindicated in patients with coronary artery disease due to their vasoconstrictor properties. Conversely, lasmiditan was developed as an antimigraine 5-HT1F receptor agonist. To assess the selectivity and cardiovascular effects of lasmiditan, we investigated the binding, functional activity, and in vitro/in vivo vascular effects of lasmiditan and compared it to sumatriptan. Experimental Approach: Binding and second messenger activity assays of lasmiditan and other serotoninergic agonists were performed for human 5-HT1A, 5-HT1B, 5-HT1D, 5-ht1E, 5-HT1F, 5-HT2A, 5-HT2B, and 5-HT7 receptors, and the results were correlated with their potency to constrict isolated human coronary arteries (HCAs). Furthermore, concentration–response curves to lasmiditan and sumatriptan were performed in proximal and distal HCA, internal mammary, and middle meningeal arteries. Finally, anaesthetized female beagle dogs received i.v. infusions of lasmiditan or sumatriptan in escalating cumulative doses, and carotid and coronary artery diameters were measured. Key Results: Lasmiditan showed high selectivity for 5-HT1F receptors. Moreover, the functional potency of the analysed compounds to inhibit cAMP increase through 5-HT1B receptor activation positively correlated with their potency to contract HCA. In isolated human arteries, sumatriptan, but not lasmiditan, induced contractions. Likewise, in vivo, sumatriptan decreased coronary and carotid artery diameters at clinically relevant doses, while lasmiditan was devoid of vasoconstrictor activity at all doses tested. Conclusions and Implications: Lasmiditan is a selective 5-HT1F receptor agonist devoid of vasoconstrictor activity. This may represent a cardiovascular safety advantage when compared to the triptans.
- Subjects :
- 0301 basic medicine
Agonist
Male
medicine.drug_class
Pyridines
Triptans
CHO Cells
Pharmacology
In Vitro Techniques
Binding, Competitive
03 medical and health sciences
chemistry.chemical_compound
Radioligand Assay
0302 clinical medicine
Cricetulus
Dogs
Piperidines
In vivo
medicine
Potency
Animals
Humans
Receptor
Dose-Response Relationship, Drug
business.industry
Sumatriptan
Cell Membrane
5-HT1F receptor
Research Papers
Coronary Vessels
Meningeal Arteries
Lasmiditan
Serotonin Receptor Agonists
030104 developmental biology
chemistry
Vasoconstriction
Receptors, Serotonin
Benzamides
cardiovascular system
Female
business
030217 neurology & neurosurgery
medicine.drug
Research Paper
Muscle Contraction
Protein Binding
Subjects
Details
- ISSN :
- 00071188
- Volume :
- 176
- Issue :
- 24
- Database :
- OpenAIRE
- Journal :
- British Journal of Pharmacology
- Accession number :
- edsair.doi.dedup.....45db3763c959ce78f9ceaf2dbf6f5759