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dc.contributor.author
Jerez, Susana Josefina
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Scachi, Fabricio
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Sierra, Liliana
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Karbiner, María Sofía
dc.contributor.author
Peral, Maria de Los Angeles
dc.date.available
2018-10-04T22:11:00Z
dc.date.issued
2012-01
dc.identifier.citation
Jerez, Susana Josefina; Scachi, Fabricio; Sierra, Liliana; Karbiner, María Sofía; Peral, Maria de Los Angeles; Vascular hyporeactivity to angiotensin II and noradrenaline in a rabbit model of obesity; Lippincott Williams; Journal Of Cardiovascular Pharmacology; 59; 1; 1-2012; 49-57
dc.identifier.issn
0160-2446
dc.identifier.uri
http://hdl.handle.net/11336/61742
dc.description.abstract
This study was conducted to explore the vascular reactivity of angiotensin II and noradrenaline and their relationship with endothelial function in rabbits fed a high-fat diet (HFD). The animals were fed either an HFD or regular chow [control diet (CD)]. After 12 weeks, the rabbits fed the HFD showed higher blood pressure, body weight, and insulin levels. Glucose tolerance was impaired and positively related to blood pressure. An endothelium-independent decrease of the sensitivity to angiotensin II [pD 2 endothelium-intact aortic rings (E+) in CD: 8.02 ± 0.07 vs. HFD: 7.60 ± 0.01; pD 2 endothelium-removed aortic rings (E-) in CD: 8.16 ± 0.11 vs. HFD: 7.83 ± 0.16] and noradrenaline (pD 2 E+ in CD: 6.36 ± 0.06 vs. HFD: 5.29 ± 0.06; pD 2 E- in CD: 6.11 ± 0.08 vs. HFD: 5.80 ± 0.08) was found. Noradrenaline desensitized the angiotensin II response (pD 2 with noradrenaline pretreatment in E+: 7.03 ± 0.16; in E-: 7.10 ± 0.02), but angiotensin II did not change the noradrenaline response. Acetylcholine maximal relaxation and basal nitric oxide (NO) release were comparable in both diet groups. The efficacy of angiotensin II (R max CD: 4604 ± 574 mg vs. HFD: 3251 ± 533 mg) and noradrenaline (R max CD: 11,675 ± 804 mg vs. HFD: 7975 ± 960 mg) was reduced in E+. L-N G-nitroarginine methyl ester (L-NAME) recovered the efficacy of noradrenaline (R max L-NAME: 12,015 ± 317 mg). In contrast, L-NAME had no effect on the angiotensin II response. Noradrenaline enhanced NO levels, but angiotensin II did not. Therefore, NO was associated with hyporeactivity to noradrenaline. The resting potential was more negative in E+, and the endothelium diminished the angiotensin II-induced depolarization. These findings demonstrated that the crosstalk and the endothelium may induce hyporeactivity to angiotensin II and noradrenaline as a mechanism to compensate the increase in the blood pressure in HFD-induced obesity.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Lippincott Williams
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Angiotensin Ii
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Endothelium
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Noradrenaline
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Obesity
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Rabbit Aortae
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Vascular Reactivity
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Fisiología
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Medicina Básica
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CIENCIAS MÉDICAS Y DE LA SALUD
dc.title
Vascular hyporeactivity to angiotensin II and noradrenaline in a rabbit model of obesity
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-10-01T15:55:43Z
dc.journal.volume
59
dc.journal.number
1
dc.journal.pagination
49-57
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Philadelphia
dc.description.fil
Fil: Jerez, Susana Josefina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Investigaciones Biológicas. Universidad Nacional de Tucumán. Instituto Superior de Investigaciones Biológicas; Argentina
dc.description.fil
Fil: Scachi, Fabricio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Investigaciones Biológicas. Universidad Nacional de Tucumán. Instituto Superior de Investigaciones Biológicas; Argentina
dc.description.fil
Fil: Sierra, Liliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Investigaciones Biológicas. Universidad Nacional de Tucumán. Instituto Superior de Investigaciones Biológicas; Argentina
dc.description.fil
Fil: Karbiner, María Sofía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Investigaciones Biológicas. Universidad Nacional de Tucumán. Instituto Superior de Investigaciones Biológicas; Argentina
dc.description.fil
Fil: Peral, Maria de Los Angeles. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Investigaciones Biológicas. Universidad Nacional de Tucumán. Instituto Superior de Investigaciones Biológicas; Argentina
dc.journal.title
Journal Of Cardiovascular Pharmacology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://journals.lww.com/cardiovascularpharm/Abstract/2012/01000/Vascular_Hyporeactivity_to_Angiotensin_II_and.7.aspx
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://dx.doi.org/10.1097/FJC.0b013e318235156a