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001-es BibID:	BIBFORM116427
Első szerző:	Tóth Kinga Fanni (molekuláris biológus, élettanász)
Cím:	Fluoxetine exerts anti-inflammatory effects on human epidermal keratinocytes, and suppresses their endothelin release / Tóth K. F., Ádám D., Arany J., Ramirez Y. A., Bíró T., Drake J. I., O'Mahony A., Szöllősi A. G., Kilic A., Soeberdt M., Abels C., Oláh A.
Dátum:	2023
ISSN:	0022-202X 1523-1747
Megjegyzések:	Pathological activity Toll-like receptor (TLR)-3 plays an important role in the pathogenesis of pruritic dermatoses and in the development of itch. Fluoxetine is a safe antidepressant with remarkable anti-inflammatory actions in various systems, including the skin. Thus, we aimed to investigate the effects of fluoxetine in a TLR3-activator induced inflammatory model by using immortalized (HaCaT) as well as primary human epidermal keratinocytes. When applied at a non-cytotoxic concentration (MTT-assay, CyQUANT-assay), fluoxetine significantly suppressed polyinosinic-polycytidylic acid (p(I:C))-induced expression and release of several proinflammatory cytokines, and it decreased the release of the itch mediator endothelins (Q-PCR, cytokine array, ELISA). Fluoxetine did not interfere with the p(I:C)-induced activation of the p38 MAPK cascade, and did not inhibit phosphorylation (and hence inactivation) of IkBa, an important inhibitor of the NF-kB pathway (western blot). Moreover, co-administration of fluoxetine failed to significantly suppress p(I:C)-induced elevation ofmitochondrial ROS production (MitoSOX Red). Instead, the anti-inflammatory effects of fluoxetine were most likely mediated via the inhibition of the phosphoinositide 3-kinase (PI3K)-pathway (unbiased activity profiling). Importantly, the PI3K-inhibitor GDC0941 fully mimicked the effects of fluoxetine. Although fluoxetine was found to be able to occupy the binding site of GDC0941 (in silico molecular docking), and to exert direct inhibitory effect on PI3K, it exhibited much lower potency and efficacy as compared to GDC0941 (cell-free PI3K activity assay). Collectively, our findings demonstrate that fluoxetine exerts potent anti-inflammatory effects, and suppresses the release of the endogenous itch mediator endothelins in human keratinocytes, most likely via indirect inhibition of PI3K. Thus, clinical studies are encouraged to explore whether the currently reported beneficial effects translate in vivo following its topical administration in inflammatory and pruritic dermatoses. Supported by: NRDIO (125055, 134235, 134993, GINOP-2.3.2-15-2016-00015, GINOP-2.3.3-15-2016-00020, EFOP-3.6.3-VEKOP-16-2017-00009); János Bolyai Research Scholarship; ÚNKP-23-5-DE-477; "Deutscher Akademischer Austauschdienst" (DAAD); Dr. AugustWolff GmbH & Co. KG Arzneimittel.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idézhető absztrakt folyóiratcikk fluoxetine itch inflammation skin keratinocyte endothelin Toll-like receptor 3
Megjelenés:	Journal Of Investigative Dermatology. - 143 : 11 (2023), p. S361. -
További szerzők:	Ádám Dorottya (1991-) (molekuláris biológus) Arany József (1990-) (klinikai laboratóriumi kutató, vegyész) Ramirez, Yesid A. Bíró Tamás (1968-) (élettanász) (absztraktok) Drake, Jennifer I. O'Mahony, Alison Szöllősi Attila Gábor (1982-) (élettanász) Kilic, Ana Soeberdt, Michael Abels, Christoph Oláh Attila (1984-) (élettanász)
Pályázati támogatás:	125055 OTKA 134235 OTKA 134993 OTKA GINOP-2.3.2-15-2016-00015 GINOP GINOP-2.3.3-15-2016-00020 GINOP EFOP-3.6.3-VEKOP-16-2017-00009 EFOP János Bolyai Research Scholarship MTA ÚNKP-23-5-DE-477 Egyéb Deutscher Akademischer Austauschdienst Egyéb Dr. AugustWolff GmbH & Co. KG Arzneimittel Egyéb
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