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Effects of Rut-bpy (Cis-[Ru(bpy)2(SO3)(NO)]PF 6), a novel nitric oxide donor, in L-NAME-induced hypertension in rats / Efeitos do Rut-bpy (Cis-[Ru(bpy)2(SO3)(NO)]PF 6), um novo doador de óxido nítrico, na hipertensão induzida com L-NAME em ratos
Campelo, Marcio Wilker Soares; Campelo, Ana Paula Bomfim Soares; Lopes, Luiz Gonzaga de França; Santos, Armenio Aguiar dos; Guimarães, Sergio Botelho; Vasconcelos, Paulo Roberto Leitão de.
  • Campelo, Marcio Wilker Soares; UFC. Department of Surgery. BR
  • Campelo, Ana Paula Bomfim Soares; UFC. Department of Surgery. BR
  • Lopes, Luiz Gonzaga de França; UFC. Department of Organic and Inorganic Chemistry. BR
  • Santos, Armenio Aguiar dos; University de Fortaleza. Faculty of Medicine.
  • Guimarães, Sergio Botelho; UFC. LABCEX. Department of Surgery. BR
  • Vasconcelos, Paulo Roberto Leitão de; UFC. Department of Surgery. BR
Acta cir. bras ; 26(supl.1): 57-59, 2011. graf
Article in English | LILACS | ID: lil-600659
ABSTRACT

PURPOSE:

To evaluate the effect of Rut-bpy (Cis-[Ru(bpy)2(SO3)(NO)]PF 6), a novel nitric oxide donor in Nω-nitro-L-arginine methyl ester (L-NAME)-induced hypertensive rats.

METHODS:

Twenty-four male Wistar rats were randomly assigned to four groups (n=6), named according to the treatment applied (G1-Saline, G2-Rut-bpy, G3-L-NAME and G4-L-NAME+Rut-bpy). L-NAME (30 mg/Kg) was injected intraperitoneally 30 minutes before the administration of Rut-bpy (100 mg/Kg). Mean abdominal aorta arterial blood pressure (MAP) was continuously monitored.

RESULTS:

Mean arterial blood pressure (MAP) in G3 rats rose progressively, reaching 147±16 mmHg compared with 100±19 mm Hg in G1 rats (p<0.05). In G4 rats, treated with L-NAME+Rut-bpy, MAP reached 149+11 mm Hg while in G2 rats, treated with Rut-bpy, MAP values were 106±11 mm Hg. In G1 rats these values decreased progressively reaching 87+14 mm Hg after 30 minutes. An important finding was the maintenance of the MAP throughout the experiment in G2 rats.

CONCLUSION:

Rut-bpy does not decrease the MAP in L-Name induced hypertensive rats. However, when it is used in anesthetized hypotensive rats a stable blood pressure is obtained.
RESUMO

OBJETIVO:

Avaliar o efeitos do Rut-bpy (Cis-[Ru (bpy)2(SO3)(NO)] PF6), um novo doador de óxido nítrico, em ratos hipertensos induzidos pelo éster metílico de N-nitro-L-arginina (L-NAME).

MÉTODOS:

Vinte e quatro ratos Wistar machos foram distribuídos aleatoriamente em quatro grupos (n = 6), nomeados de acordo com o tratamento aplicado (G1-Salina, G2-Rut-bpy, G3-L-NAME e G4-L-NAME+Rut -bpy). L-NAME (30 mg / Kg) foi injetado por via intraperitoneal 30 minutos antes da administração de Rut-bpy (100 mg / kg). A pressão arterial média (PAM) da aorta abdominal foi monitorada continuamente.

RESULTADOS:

A pressão arterial média (PAM) em ratos do grupo G3 subiu progressivamente, chegando a 147 ±16 mm Hg, em comparação com 100 ±19 mm Hg em ratos do G1 (p <0,05). Em ratos G4, tratados com L-NAME + Rut-bpy, a PAM atingiu 149±11 milímetros de Hg, enquanto no G2 (ratos tratados com Rut bpy) os valores da PAM foram 106 ±11 mm Hg. No G1 esses valores decresceram progressivamente, atingindo 87±14 mm Hg após 30 minutos. Um achado importante foi a manutenção da PAM durante todo o experimento em ratos do grupo G2.

CONCLUSÃO:

O uso de Rut bpy não diminui a PAM em ratos hipertensos por L-NAME. No entanto, quando ele é usado em ratos anestesiados, hipotensos, uma pressão arterial estável é obtida.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Organometallic Compounds / Ruthenium / Vasodilator Agents / Blood Pressure / Nitric Oxide Donors / Coordination Complexes / Hypertension Type of study: Prognostic study / Systematic reviews Limits: Animals Language: English Journal: Acta cir. bras Journal subject: General Surgery / Procedimentos Cir£rgicos Operat¢rios Year: 2011 Type: Article Affiliation country: Brazil Institution/Affiliation country: UFC/BR

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Full text: Available Index: LILACS (Americas) Main subject: Organometallic Compounds / Ruthenium / Vasodilator Agents / Blood Pressure / Nitric Oxide Donors / Coordination Complexes / Hypertension Type of study: Prognostic study / Systematic reviews Limits: Animals Language: English Journal: Acta cir. bras Journal subject: General Surgery / Procedimentos Cir£rgicos Operat¢rios Year: 2011 Type: Article Affiliation country: Brazil Institution/Affiliation country: UFC/BR