1
|
Azurmendi PJ, Toro AR, Celía AF, Guevara D, Solerno MR, Di Ciano LA, Toledo JE, Ibarra FR, Arrizurieta EE, Oddo EM. Behavior of the renal kallikrein in spontaneously hypertensive rats: Influence of sexual hormones and aldosterone-sensitive distal nephron ion channels. Peptides 2023; 160:170925. [PMID: 36549423 DOI: 10.1016/j.peptides.2022.170925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 12/01/2022] [Accepted: 12/15/2022] [Indexed: 12/24/2022]
Abstract
The renal kallikrein-kinin system (RKKS) has been related to blood pressure control and sodium and water balance. We have previously shown that female spontaneously hypertensive rats (SHR) have high urinary kallikrein activity (UKa) and lower blood pressure (BP) than males whereas ovariectomy stimulates UKa and diminishes BP. We also showed that high K+ intake and prepuberal gonadectomy (Gx) diminish BP with a concomitant increase in UKa and plasma aldosterone levels. Since kallikrein co-localize in the same distal nephron segments of aldosterone effectors, we explored the effect of pharmacological blockage of aldosterone receptor, epithelial Na+ (ENaC) and the rectifying outer medulla K+ (ROMK) channels in different gonad contexts on the gene expression, renal tissue content and urine release of kallikrein. Klk1 gene expression was determined by real-time PCR and enzymatic activity of kallikrein by the amidolytic method. We found that the inhibition of the aldosterone receptor by spironolactone increases kallikrein renal tissue storage and decreases its urinary activity, especially in Gx rats. Moreover, ENaC blockade by benzamil increases the renal content of kallikrein without affecting synthesis or excretion, especially in females and Gx animals, while the inhibition of ROMK by glibenclamide increases the synthesis and renal content of kallikrein only in intact male animals. We concluded that RKKS regulation showed sexual dimorphism and seemed to be modulated by sex hormones throughout a process involving aldosterone and the aldosterone-sensitive ion channels..
Collapse
Affiliation(s)
- Pablo Javier Azurmendi
- Universidad de Buenos Aires, Laboratorio de Nefrología Experimental y Bioquímica Molecular, Instituto de Investigaciones Médicas A. Lanari, Buenos Aires, Argentina.
| | - Ayelén Rayen Toro
- Universidad de Buenos Aires, Laboratorio de Nefrología Experimental y Bioquímica Molecular, Instituto de Investigaciones Médicas A. Lanari, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Alejandro Fabián Celía
- Universidad de Buenos Aires, Laboratorio de Nefrología Experimental y Bioquímica Molecular, Instituto de Investigaciones Médicas A. Lanari, Buenos Aires, Argentina
| | - Darío Guevara
- Universidad de Buenos Aires, Laboratorio de Nefrología Experimental y Bioquímica Molecular, Instituto de Investigaciones Médicas A. Lanari, Buenos Aires, Argentina
| | - Martín Rogelio Solerno
- Universidad de Buenos Aires, Laboratorio de Nefrología Experimental y Bioquímica Molecular, Instituto de Investigaciones Médicas A. Lanari, Buenos Aires, Argentina
| | - Luis Alberto Di Ciano
- Universidad de Buenos Aires, Laboratorio de Nefrología Experimental y Bioquímica Molecular, Instituto de Investigaciones Médicas A. Lanari, Buenos Aires, Argentina
| | - Jorge Eduardo Toledo
- Universidad de Buenos Aires, Laboratorio de Nefrología Experimental y Bioquímica Molecular, Instituto de Investigaciones Médicas A. Lanari, Buenos Aires, Argentina
| | - Fernando Raúl Ibarra
- Universidad de Buenos Aires, Laboratorio de Nefrología Experimental y Bioquímica Molecular, Instituto de Investigaciones Médicas A. Lanari, Buenos Aires, Argentina; Universidad de Buenos Aires, Departamento de Ciencias Fisiológicas, Instituto de Fisiología y Biofísica Bernardo Houssay (IFIBIO Houssay)-CONICET, Facultad de Medicina, Buenos Aires, Argentina
| | - Elvira Emilia Arrizurieta
- Universidad de Buenos Aires, Laboratorio de Nefrología Experimental y Bioquímica Molecular, Instituto de Investigaciones Médicas A. Lanari, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Elisabet Mónica Oddo
- Universidad de Buenos Aires, Laboratorio de Nefrología Experimental y Bioquímica Molecular, Instituto de Investigaciones Médicas A. Lanari, Buenos Aires, Argentina
| |
Collapse
|