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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.
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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
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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
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Otero-Losada M, Etchegoyen M. Re: Zhou Y, Zhang R, Wang G, et al. Coexistence effect of hypertension and angiotensin II on the risk of coronary heart disease: a population-based prospective cohort study among Inner Mongolians in China. Curr Med Res Opin. 2019;35:1473-1478. Curr Med Res Opin 2020; 36:1417. [PMID: 31364877 DOI: 10.1080/03007995.2019.1651131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 07/25/2019] [Indexed: 10/26/2022]
Affiliation(s)
- Matilde Otero-Losada
- Institute of Cardiological Research, National Research Council ININCA.UBA.CONICET, University of Buenos Aires, Buenos Aires, Argentina
| | - Melisa Etchegoyen
- Institute of Cardiological Research, National Research Council ININCA.UBA.CONICET, University of Buenos Aires, Buenos Aires, Argentina
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