Pharmacological characterization of 6-Nitrodopamine in the systemic and renal hemodynamics of mammals and reptiles

• Grant number: 22/08232-7
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: November 01, 2022
• End date: October 31, 2025
• Field of knowledge: Biological Sciences - Pharmacology - Autonomic Pharmacology
• Principal Investigator: Gilberto de Nucci
• Grantee: Rafael de Morais Campos
• Host Institution: Faculdade de Ciências Médicas (FCM). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated research grant: 19/16805-4 - Evaluation of the pathophysiological role of endothelial catecholamines, AP.TEM
• Associated scholarship(s): 23/15350-9 - 6-Nitrodopamine and the respiratory system, BE.EP.PD

Abstract

The endothelium is capable of producing and secreting contracting substances (endothelin-1 and prostanoid-PGH2) and relaxing substances (nitric oxide and prostacyclin) that regulate vascular tone. Although historically catecholamines are strongly associated with neural origin, the group led by Prof. Gilberto De Nucci demonstrated the production of these substances by the vascular endothelium of reptiles and mammals. 6-Nitrodopamine, a new endothelial mediator, formed from the availability of nitric oxide and dopamine, had its effect characterized in vascular preparations (in vitro) of reptiles and mammals. However, investigations regarding its role in systemic and renal hemodynamics, as well as the purification and sequencing of its receptor have not yet been carried out. This investigation will represent an advance in cardiovascular physiopharmacology. Purification and sequencing of the 6-ND receptor in rat atria will be critical for pharmacodynamic studies and future development of agonists/antagonists for 6-ND receptors. The present grant application aims to evaluate the in vivo effect of 6-ND on reptiles (Chelonoidis carbonaria, Trachemys scripta and Tupinambis teguxim), to investigate systemic hemodynamics in rats (telemetry) and to investigate renal effects (perfused kidneys and renal hemodynamics), as well as sequencing and purifying and sequencing 6-ND receptors.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BRITTO-JUNIOR, JOSE; LIMA, ANTONIO TIAGO; CAMPOS, RAFAEL; GIAO, ALEXANDRE ASTURIANO; MENDES, GUSTAVO DUARTE; SILVA, LUIZA P. FERREIRA-NOVAES P.; FREGONESI, ADRIANO; PUPO, ANDRE SAMPAIO; ANTUNES, EDSON; DE NUCCI, GILBERTO. 6-Nitrodopamine potentiates contractions of rat isolated vas deferens induced by noradrenaline, adrenaline, dopamine and electric field stimulation. NAUNYN-SCHMIEDEBERGS ARCHIVES OF PHARMACOLOGY, v. N/A, p. 16-pg., 2023-04-04. (21/14414-8, 17/15175-1, 19/16805-4, 22/08232-7, 22/06644-6, 21/13593-6)

CAMPOS, RAFAEL; NIEDERAUER, ANA JULIA SCHMIDT; BRITTO-JUNIOR, JOSE; DE SOUZA, VALERIA B.; SCHENKA, ANDRE A.; MONICA, FABIOLA Z.; MORAES, MANOEL ODORICO; MORAES, MARIA ELISABETE A.; ANTUNES, EDSON; DE NUCCI, GILBERTO. Basal release and relaxation responses to 6-nitrodopamine in swine carotid, coronary, femoral, and renal arteries. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY, v. 285, p. 13-pg., 2024-08-17. (21/13726-6, 22/08232-7, 17/15175-1, 19/16805-4, 21/14414-8, 23/15350-9, 23/14557-9)

QUIRINO JUNIOR, GILBERTO; BRITTO-JUNIOR, JOSE; MAGALHAES, TAINAH BABADOPULOS; CAMPOS, RAFAEL; NYAMKONDIWA, KUDZAI L.; KLUGH, KAMERON L.; PETERSON, LARRYN W.; CORVINO, ANGELA; SPARACO, ROSA; FRECENTESE, FRANCESCO; et al. Measurement of 6-cyanodopamine, 6-nitrodopa, 6-nitrodopamine and 6-nitroadrenaline by LC-MS/MS in Krebs-Henseleit solution. Assessment of basal release from rabbit isolated right atrium and ventricles. BIOMEDICAL CHROMATOGRAPHY, v. N/A, p. 14-pg., 2023-07-10. (21/14414-8, 22/08022-2, 19/16805-4, 22/08232-7)