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Your search keyword '"Theofanous, Stavroula"' showing total 2 results
Start Over Author "Theofanous, Stavroula" Topic trpv cation channels
2 results on '"Theofanous, Stavroula"'

1. Effect of resolvins on sensitisation of TRPV1 and visceral hypersensitivity in IBS.

Author

Perna E, Aguilera-Lizarraga J, Florens MV, Jain P, Theofanous SA, Hanning N, De Man JG, Berg M, De Winter B, Alpizar YA, Talavera K, Vanden Berghe P, Wouters M, and Boeckxstaens G

Subjects
Adult, Animals, Capsaicin pharmacology, Disease Models, Animal, Docosahexaenoic Acids pharmacology, Eicosapentaenoic Acid analogs & derivatives, Eicosapentaenoic Acid pharmacology, Enterobacteriaceae Infections complications, Female, Ganglia, Spinal, Histamine, Humans, Hypersensitivity etiology, Hypersensitivity metabolism, Inflammation chemically induced, Inflammation complications, Irritable Bowel Syndrome drug therapy, Male, Mice, Middle Aged, Neurons metabolism, Rats, Hypersensitivity drug therapy, Irritable Bowel Syndrome metabolism, Receptors, Cannabinoid metabolism, TRPV Cation Channels metabolism
Abstract

Objective: Resolvins (RvD1, RvD2 and RvE1) are endogenous anti-inflammatory lipid mediators that display potent analgesic properties in somatic pain by modulating transient receptor potential vanilloid 1 (TRPV1) activation. To what extent these molecules could also have a beneficial effect on TRPV1 sensitisation and visceral hypersensitivity (VHS), mechanisms involved in IBS, remains unknown., Design: The effect of RvD1, RvD2 and RvE1 on TRPV1 activation and sensitisation by histamine or IBS supernatants was assessed on murine dorsal root ganglion (DRG) neurons using live Ca 2+ imaging. Based on the results obtained in vitro, we further studied the effect of RvD2 in vivo using a murine model of post-infectious IBS and a rat model of post-inflammatory VHS. Finally, we also tested the effect of RvD2 on submucosal neurons in rectal biopsies of patients with IBS., Results: RvD1, RvD2 and RvE1 prevented histamine-induced TRPV1 sensitisation in DRG neurons at doses devoid of an analgesic effect. Of note, RvD2 also reversed TRPV1 sensitisation by histamine and IBS supernatant. This effect was blocked by the G protein receptor 18 (GPR18) antagonist O-1918 (3-30 µM) and by pertussis toxin. In addition, RvD2 reduced the capsaicin-induced Ca 2+ response of rectal submucosal neurons of patients with IBS. Finally, treatment with RvD2 normalised pain responses to colorectal distention in both preclinical models of VHS., Conclusions: Our data suggest that RvD2 and GPR18 agonists may represent interesting novel compounds to be further evaluated as treatment for IBS., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2021. No commercial re-use. See rights and permissions. Published by BMJ.)

Published
2021
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2. Effect of resolvins on sensitisation of TRPV1 and visceral hypersensitivity in IBS

Author

Piyush Jain, Morgane Florens, Mira M. Wouters, Javier Aguilera-Lizarraga, Yeranddy A. Alpizar, Pieter Vanden Berghe, Maya Berg, Guy E. Boeckxstaens, Joris G. De Man, Karel Talavera, Nikita Hanning, Benedicte Y. De Winter, Eluisa Perna, Stavroula Theofanous, Perna, Eluisa, Aguilera-Lizarraga, Javier, Florens, Morgane V, Jain, Piyush, Theofanous, Stavroula A, Hanning, Nikita, De Man, Joris G, Berg, Maya, De Winter, Benedicte, AGUIAR ALPIZAR, Yeranddy, Talavera, Karel, Vanden Berghe, Pieter, Wouters, Mira, and Boeckxstaens, Guy

Subjects
Adult, Male, Docosahexaenoic Acids, TRPV1, TRPV Cation Channels, Pharmacology, Pertussis toxin, Mice, Transient receptor potential channel, chemistry.chemical_compound, Dorsal root ganglion, neurogastroenterology, In vivo, Ganglia, Spinal, Hypersensitivity, medicine, Animals, Humans, Receptors, Cannabinoid, Biology, Irritable bowel syndrome, Inflammation, Neurons, irritable bowel syndrome, business.industry, Enterobacteriaceae Infections, Gastroenterology, Antagonist, abdominal pain, Middle Aged, medicine.disease, Rats, Disease Models, Animal, ION channels, medicine.anatomical_structure, Eicosapentaenoic Acid, chemistry, nervous system, visceral hypersensitivity, Female, Human medicine, Capsaicin, business, Histamine
Abstract

ObjectiveResolvins (RvD1, RvD2 and RvE1) are endogenous anti-inflammatory lipid mediators that display potent analgesic properties in somatic pain by modulating transient receptor potential vanilloid 1 (TRPV1) activation. To what extent these molecules could also have a beneficial effect on TRPV1 sensitisation and visceral hypersensitivity (VHS), mechanisms involved in IBS, remains unknown.DesignThe effect of RvD1, RvD2 and RvE1 on TRPV1 activation and sensitisation by histamine or IBS supernatants was assessed on murine dorsal root ganglion (DRG) neurons using live Ca2+ imaging. Based on the results obtained in vitro, we further studied the effect of RvD2 in vivo using a murine model of post-infectious IBS and a rat model of post-inflammatory VHS. Finally, we also tested the effect of RvD2 on submucosal neurons in rectal biopsies of patients with IBS.ResultsRvD1, RvD2 and RvE1 prevented histamine-induced TRPV1 sensitisation in DRG neurons at doses devoid of an analgesic effect. Of note, RvD2 also reversed TRPV1 sensitisation by histamine and IBS supernatant. This effect was blocked by the G protein receptor 18 (GPR18) antagonist O-1918 (3–30 µM) and by pertussis toxin. In addition, RvD2 reduced the capsaicin-induced Ca2+ response of rectal submucosal neurons of patients with IBS. Finally, treatment with RvD2 normalised pain responses to colorectal distention in both preclinical models of VHS.ConclusionsOur data suggest that RvD2 and GPR18 agonists may represent interesting novel compounds to be further evaluated as treatment for IBS.

Published
2021

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