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001-es BibID:BIBFORM076862
035-os BibID:(cikkazonosító)e0211433 (WOS)000457037500170 (Scopus)85060512660
Első szerző:Ivic, Ivan
Cím:VPAC1 receptors play a dominant role in PACAP-induced vasorelaxation in female mice / Ivan Ivic, Marta Balasko, Balazs D. Fulop, Hitoshi Hashimoto, Gabor Toth, Andrea Tamas, Tamas Juhasz, Akos Koller, Dora Reglodi, Margit Solymár
Dátum:2019
ISSN:1932-6203
Megjegyzések:PACAP and VIP are closely related neuropeptides with wide distribution and potent effect in the vasculature. We previously reported vasomotor activity in peripheral vasculature of male wild type (WT) and PACAP-deficient (KO) mice. However, female vascular responses are still unexplored. We hypothesized that PACAP-like activity is maintained in female PACAP KO mice and the mechanism through which it is regulated differs from that of male PACAP KO animals. METHODS: We investigated the vasomotor effects of VIP and PACAP isoforms and their selective blockers in WT and PACAP KO female mice in carotid and femoral arteries. The expression and level of different PACAP receptors in the vessels were measured by RT-PCR and Western blot. RESULTS: In both carotid and femoral arteries of WT mice, PACAP1-38, PACAP1-27 or VIP induced relaxation, without pronounced differences between them. Reduced relaxation was recorded only in the carotid arteries of KO mice as compared to their WT controls. The specific VPAC1R antagonist completely blocked the PACAP/VIP-induced relaxation in both arteries of all mice, while PAC1R antagonist affected relaxation only in their femoral arteries. CONCLUSION: In female WT mice, VPAC1 receptors appear to play a dominant role in PACAP-induced vasorelaxation both in carotid and in femoral arteries. In the PACAP KO group PAC1R activation exerts vasorelaxation in the femoral arteries but in carotid arteries there is no significant effect of the activation of this receptor. In the background of this regional difference, decreased PAC1R and increased VPAC1R availability in the carotid arteries was found.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Plos One. - 14 : 1 (2019), p. e0211433. -
További szerzők:Balaskó Márta Fülöp Balázs Dániel (Orvosi alapkutatások) Hashimoto, Hitoshi Tóth Gábor (Szeged) Tamás Andrea (Idegtudomány) (Pécs) Juhász Tamás (1976-) (biológus, orvosbiológus) Koller Ákos Reglődi Dóra (Idegtudományok) Solymár Margit
Pályázati támogatás:EFOP-3.6.3-VEKOP-16-15 2017-00008
EFOP
EFOP-3.6.3-VEKOP-16-2017-00009
EFOP
K115874
OTKA
K104984
OTKA
K119759
OTKA
KTIA_13_NAP-A-III/5
Egyéb
GINOP-2.3.2-15-2016-00050 "PEPSYS"
GINOP
TÁMOP-4.2.4.A/2-11-1-2012-0001
TÁMOP
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DOI
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001-es BibID:BIBFORM069486
Első szerző:Ivic, Ivan
Cím:Backup Mechanisms Maintain PACAP/VIP-Induced Arterial Relaxations in Pituitary Adenylate Cyclase-Activating Polypeptide-Deficient Mice / Ivic I., Fulop B. D., Juhasz T., Reglodi D., Toth G., Hashimoto H., Tamas A., Koller A.
Dátum:2017
Megjegyzések:Pituitary adenylate cyclase-activating polypeptide (PACAP) is a multifunctional neuropeptide in the VIP/secretin/glucagon peptide superfamily. Two active forms, PACAP1-38 and PACAP1-27, act through G protein-coupled receptors, the PAC1 and VPAC1/2 receptors. Effects of PACAP include potent vasomotor activity. Vasomotor activity and organ-specific vasomotor effects of PACAP-deficient mice have not yet been investigated; thus, the assessment of its physiological importance in vasomotor functions is still missing. We hypothesized that backup mechanisms exist to maintain PACAP pathway activity in PACAP knockout (KO) mice. Thus, we investigated the vasomotor effects of exogenous vasoactive intestinal peptide (VIP) and PACAP polypeptides in PACAP wild-type (WT) and PACAP-deficient (KO) male mice.METHODS:Carotid and femoral arteries were isolated from 8- to 12-week-old male WT and PACAP-KO mice. Vasomotor responses were measured with isometric myography.RESULTS:In the arteries of WT mice the peptides induced relaxations, which were significantly greater to PACAP1-38 than to PACAP1-27 and VIP. In KO mice, PACAP1-38 did not elicit relaxation, whereas PACAP1-27 and VIP elicited significantly greater relaxation in KO mice than in WT mice. The specific PAC1R and VPAC1R antagonist completely blocked the PACAP-induced relaxations.CONCLUSION:Our data suggest that in PACAP deficiency, backup mechanisms maintain arterial relaxations to polypeptides, indicating an important physiological role for the PACAP pathway in the regulation of vascular tone.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Carotid arteries
Femoral arteries
PAC1 receptor
PACAP-KO mice
Pituitary adenylate cyclase-activating polypeptide
VPAC1/VPAC2 receptors
Vasoactive intestinal peptide
Vasomotor responses
Megjelenés:Journal of Vascular Research 54 : 3 (2017), p. 180-192. -
További szerzők:Fülöp Balázs Dániel (Orvosi alapkutatások) Juhász Tamás (1976-) (biológus, orvosbiológus) Reglődi Dóra (Idegtudományok) Tóth Gábor (Szeged) Hashimoto, Hitoshi Tamás Andrea (Idegtudomány) (Pécs) Koller Ákos
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
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