1
|
Romero Caimi G, Gorzalczany S, Bonazzola P, Deza Z, Rosón MI, Alvarez L, Castilla R. Angiotensin II type 1 receptor is involved in hypertension and vascular alterations caused by environmental toxicant hexachlorobenzene. Toxicol Rep 2021; 8:1599-1606. [PMID: 34522623 PMCID: PMC8424126 DOI: 10.1016/j.toxrep.2021.08.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 07/04/2021] [Accepted: 08/28/2021] [Indexed: 11/30/2022] Open
Abstract
Environmental hexachlorobenzene (HCB) increases blood pressure (BP) in female rats, causing alterations in arterial structure and function. Here we study the role of Angiotensin II receptor type 1 (AT1) in HCB-induced hypertension through the use of AT1 antagonist losartan. HCB-treated male rats showed a 22.7% increase in BP which was prevented by losartan. Losartan blocked HCB-induced changes in arterial morphology (decreased aorta cell number and increased wall thickness). Losartan also prevented HCB-induced alterations in artery relaxation by acetylcholine and nitroprusside but not the reduction in the maximum contraction by phenylephrine. Losartan rescued arterial molecular alterations caused by HCB (i.e. an increase in TGF-β1 and AT1 expression and a decrease in eNOS expression and nitrite levels) and reduced hydrogen sulfide plasma concentration. In conclusion: in this work we demonstrate that AT1 activity is involved in HCB effects on the vascular system leading to hypertension.
Collapse
Key Words
- AT1
- AT1, angiotensin II receptor type 1
- Ach, acetylcholine
- AhR, aryl hydrocarbon receptor
- Ang II, angiotensin II
- Aorta
- BP, systolic blood pressure
- H&E, hematoxylin and eosin
- HCB, hexachlorobenzene
- Hexachlorobenzene
- Hypertension
- Losartan
- NO, nitric oxide
- PCBs, polychlorinated biphenyls
- POPs, persistent organic pollutant
- Phe, phenylephrine
- SNP, nitroprusside
- TGF-β1, Transforming Growth Factor-β1
- eNOS, endothelial nitric oxide synthase
Collapse
Affiliation(s)
- Giselle Romero Caimi
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Laboratorio de Efectos Biológicos de Contaminantes Ambientales, Paraguay 2155, C1121ABG Ciudad Autónoma de Buenos Aires, Argentina
| | - Susana Gorzalczany
- Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Departamento de Farmacología, Cátedra de Farmacología, Junín 956, C1113AAD, Ciudad Autónoma de Buenos Aires, Argentina
| | - Patricia Bonazzola
- Universidad de Buenos Aires, CONICET, Instituto Alberto C. Taquini de Investigaciones en Medicina Traslacional (IATIMET), Marcelo T. de Alvear 2270, C1122AAJ, Ciudad Autónoma de Buenos Aires, Argentina
| | - Zahira Deza
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Laboratorio de Efectos Biológicos de Contaminantes Ambientales, Paraguay 2155, C1121ABG Ciudad Autónoma de Buenos Aires, Argentina
| | - María Inés Rosón
- Universidad de Buenos Aires, CONICET, Instituto Alberto C. Taquini de Investigaciones en Medicina Traslacional (IATIMET), Marcelo T. de Alvear 2270, C1122AAJ, Ciudad Autónoma de Buenos Aires, Argentina
| | - Laura Alvarez
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Laboratorio de Efectos Biológicos de Contaminantes Ambientales, Paraguay 2155, C1121ABG Ciudad Autónoma de Buenos Aires, Argentina
| | - Rocío Castilla
- Universidad de Buenos Aires, CONICET, Instituto Alberto C. Taquini de Investigaciones en Medicina Traslacional (IATIMET), Marcelo T. de Alvear 2270, C1122AAJ, Ciudad Autónoma de Buenos Aires, Argentina
| |
Collapse
|
2
|
Castilla R, Gutierrez CPA, Azzato F, Ambrosio G, Milei J. Coronary Intimal Thickening: Once Again. Angiology 2019; 71:90-91. [PMID: 31462064 DOI: 10.1177/0003319719872625] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Rocío Castilla
- Universidad de Buenos Aires, CONICET, Instituto de Investigaciones Cardiológicas (ININCA), Buenos Aires, Argentina
| | - Christopher P A Gutierrez
- Universidad de Buenos Aires, CONICET, Instituto de Investigaciones Cardiológicas (ININCA), Buenos Aires, Argentina
| | - Francisco Azzato
- Universidad de Buenos Aires, CONICET, Instituto de Investigaciones Cardiológicas (ININCA), Buenos Aires, Argentina
| | - Giuseppe Ambrosio
- Division of Cardiology, School of Medicine, University of Perugia, Perugia, Italy
| | - José Milei
- Universidad de Buenos Aires, CONICET, Instituto de Investigaciones Cardiológicas (ININCA), Buenos Aires, Argentina
| |
Collapse
|
3
|
Castilla R, Asuaje A, Rivière S, Romero CG, Martín P, Cao G, Kleiman de Pisarev D, Milesi V, Alvarez L. Environmental pollutant hexachlorobenzene induces hypertension in a rat model. CHEMOSPHERE 2018; 195:576-584. [PMID: 29277037 DOI: 10.1016/j.chemosphere.2017.11.117] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 10/27/2017] [Accepted: 11/21/2017] [Indexed: 05/10/2023]
Abstract
Hexachlorobenzene (HCB) is a dioxin-like environmental pollutant, widely distributed in the environment. New research links exposure to high levels of persistent organic environmental toxicants to cardiovascular disease, however little is known about the effect of HCB on vascular function and on blood pressure. The purpose of the present study was to evaluate biochemical and cardiovascular changes resulting from subchronic HCB exposure. Adult female Sprague-Dawley rats were treated with vehicle or HCB (5 or 500 mg/kg b.w) for 45 days. Systolic blood pressure (BP), recorded by tail cuff plethysmography, was significantly increased at 35, 40 and 45 days of 500 mg/kg HCB-treatment. HCB (500 mg/kg) increased arterial thickness, while both 5 and 500 mg/kg HCB decreased proliferating cell nuclear antigen (PCNA) protein levels and cellular nuclei in abdominal aortas indicating a hypertrophic process. Also, aortas from both groups of HCB-treated rats presented higher sensitivity to noradrenalin (NA) and a significant decrease in maximum contractile response. Arteries from 500 mg/kg HCB-treated rats showed a significant increase in the levels of transforming growth factor-β1 (TGF-β1) mRNA and angiotensin II type1 receptor (AT1), and a significant decrease in estrogen receptor alpha (ERα), endothelial nitric oxidide synthase (eNOS) protein expression and deiodinase II (DII) mRNA levels. In conclusion, we have demonstrated for the first time that subchronic HCB administration significantly increases BP and alters associated cardiovascular parameters in rats. In addition, HCB alters the expression of key vascular tissue molecules involved in BP regulation, such as TGF-β1, AT1, ERα, eNOS and DII.
Collapse
Affiliation(s)
- Rocío Castilla
- Universidad de Buenos Aires, CONICET, Instituto de Investigaciones Cardiológicas (ININCA), C1122AAJ Buenos Aires, Argentina.
| | - Agustín Asuaje
- Universidad Nacional de La Plata, Facultad de Ciencias Exactas, CONICET, Instituto de Estudios Inmunológicos y Fisiopatológicos (IIFP), 1900, La Plata, Buenos Aires, Argentina.
| | - Stéphanie Rivière
- Universidad de Buenos Aires, CONICET, Instituto de Investigaciones Cardiológicas (ININCA), C1122AAJ Buenos Aires, Argentina.
| | - Caimi Giselle Romero
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Laboratorio de Efectos Biológicos de Contaminantes Ambientales, C1121ABG, Buenos Aires, Argentina.
| | - Pedro Martín
- Universidad Nacional de La Plata, Facultad de Ciencias Exactas, CONICET, Instituto de Estudios Inmunológicos y Fisiopatológicos (IIFP), 1900, La Plata, Buenos Aires, Argentina.
| | - Gabriel Cao
- Universidad de Buenos Aires, CONICET, Instituto de Investigaciones Cardiológicas (ININCA), C1122AAJ Buenos Aires, Argentina.
| | - Diana Kleiman de Pisarev
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Laboratorio de Efectos Biológicos de Contaminantes Ambientales, C1121ABG, Buenos Aires, Argentina.
| | - Verónica Milesi
- Universidad Nacional de La Plata, Facultad de Ciencias Exactas, CONICET, Instituto de Estudios Inmunológicos y Fisiopatológicos (IIFP), 1900, La Plata, Buenos Aires, Argentina.
| | - Laura Alvarez
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Laboratorio de Efectos Biológicos de Contaminantes Ambientales, C1121ABG, Buenos Aires, Argentina.
| |
Collapse
|