Endothelinergic Contractile Hyperreactivity in Rat Contralateral Carotid to Balloon Injury: Integrated Role for ETB Receptors and Superoxide Anion

Author(s)

Pernomian, Larissa ; Gimenes, Lilian R. ; Gomes, Mayara S. ; do Vale, Bruno N. ; Cardoso, Cristina R. B. ; de Oliveira, Ana M. ; Moreira, Josimar D.

• Document type: Journal article
• Source: BIOMED RESEARCH INTERNATIONAL; v. 2017, p. 13-pg., 2017-01-01.

Abstract

Temporal consequences of neurocompensation to balloon injury on endothelinergic functionality in rat contralateral carotid were evaluated. Rats underwent balloon injury in left carotid and were treated with CP-96345 (NK1 antagonist). Concentration-response curves for endothelin-1 were obtained in contralateral (right) carotid at 2, 8, 16, 30, or 45 days after surgery in the absence or presence of BQ-123 (ETA antagonist), BQ-788 (ETB antagonist), or Tempol (superoxide-dismutase mimic). Endothelin-1-induced calcium mobilization was evaluated in functional assays carried out with BQ-123, BQ-788, or Tempol. Endothelin-1-induced NADPH oxidase-driven superoxide generation was measured by lucigenin chemiluminescence assays performed with BQ-123 or BQ-788. Endothelin-1-induced contraction was increased in contralateral carotid from the sixteenth day after surgery. This response was restored in CP-96345-treated rats. Endotheliumremoval or BQ-123 did not change endothelin-1-induced contraction in contralateral carotid. This response was restored by BQ-788 or Tempol. Contralateral carotid exhibited an increased endothelin-1-induced calcium mobilization, which was restored by BQ-788 or Tempol. Contralateral carotid exhibited an increased endothelin-1-induced lucigenin chemiluminescence, which was restored by BQ-788. We conclude that the NK1-mediated neurocompensatory response to balloon injury elicits a contractile hyperreactivity to endothelin-1 in rat contralateral carotid by enhancing the muscular ETB-mediated NADPH oxidase-driven generation of superoxide, which activates calcium channels. (AU)

• FAPESP's process: 12/00640-7 - Study of the consequences of the inflammatory process induced by AT1 receptors during atherosclerosis on the ACE2 - angiotensin-(1-7) - Mas axis in mouse aorta and the involvement of Mas receptors in the vaso- and atheroprotective effects of losartan
• Grantee: Larissa Pernomian
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 14/17740-0 - Planning, development and pharmacological evaluation of new aryl hydrocarbon receptors (AhR) antagonists that are candidates for atheroprotective drugs
• Grantee: Larissa Pernomian
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/08216-2 - CRID - Center for Research in Inflammatory Diseases
• Grantee: Fernando de Queiroz Cunha
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 12/09019-3 - Consequences of dyslipidemia on the ACE - Ang II - AT1 and ACE2 - Ang-(1-7) - mas axes from the angiotensinergic system in aorta from young and adult LDLr knockout mice
• Grantee: Ana Maria de Oliveira
• Support Opportunities: Regular Research Grants
• FAPESP's process: 09/01005-0 - Influence of oxidative stress on the response to angiotensin II in contralateral carotid of diabetic rat after balloon-catheter injury
• Grantee: Larissa Pernomian
• Support Opportunities: Scholarships in Brazil - Doctorate