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Therapeutic effects of angiotensin II type 1 receptor blocker at an advanced stage of hypertensive diastolic heart failure.
J Hypertens. 2007 Feb; 25(2):455-61.JH

Abstract

OBJECTIVE

Angiotensin II type 1 receptor blocker (ARB) is increasingly prescribed for the treatment of systolic heart failure with a growing body of clinical evidence. The roles of ARB, however, remain to be clarified in the treatment of diastolic heart failure (DHF), particularly at its advanced stage. This experimental study investigated the effects of ARB administered at an advanced stage of hypertensive DHF.

METHODS

Dahl salt-sensitive rats fed an 8% NaCl diet from age 7 weeks represent overt DHF at age 20 weeks, as noted in previous studies (hypertensive DHF model). The DHF model rats were randomly divided into two groups at age 17 weeks when left ventricular diastolic dysfunction, hypertrophy, fibrosis, macrophage infiltration and reactive oxygen species generation were already augmented; six rats treated for 3 weeks with a subdepressor dose of ARB (olmesartan 0.6 mg/kg per day), and six untreated rats.

RESULTS

The 3-week administration of ARB significantly decreased the left ventricular end-diastolic pressure in association with attenuation of left ventricular hypertrophy, fibrosis and diastolic dysfunction. Macrophage infiltration was attenuated with decreased gene expression of transforming growth factor-beta1 and monocyte chemoattractant protein-1 in the left ventricular myocardium of the ARB-treated rats. The production of reactive oxygen species also decreased with NADPH oxidase activity.

CONCLUSIONS

ARB provides beneficial effects in hypertensive DHF independent of its antihypertensive effects even if initiated at an advanced stage. The beneficial effects are at least partly attributed to the attenuation of inflammatory changes and oxidative stress through the suppression of cytokine and chemokine production and of NADPH oxidase activity.

Authors+Show Affiliations

Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Suita, Japan.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17211254

Citation

Nishio, Mayu, et al. "Therapeutic Effects of Angiotensin II Type 1 Receptor Blocker at an Advanced Stage of Hypertensive Diastolic Heart Failure." Journal of Hypertension, vol. 25, no. 2, 2007, pp. 455-61.
Nishio M, Sakata Y, Mano T, et al. Therapeutic effects of angiotensin II type 1 receptor blocker at an advanced stage of hypertensive diastolic heart failure. J Hypertens. 2007;25(2):455-61.
Nishio, M., Sakata, Y., Mano, T., Yoshida, J., Ohtani, T., Takeda, Y., Miwa, T., Masuyama, T., Yamamoto, K., & Hori, M. (2007). Therapeutic effects of angiotensin II type 1 receptor blocker at an advanced stage of hypertensive diastolic heart failure. Journal of Hypertension, 25(2), 455-61.
Nishio M, et al. Therapeutic Effects of Angiotensin II Type 1 Receptor Blocker at an Advanced Stage of Hypertensive Diastolic Heart Failure. J Hypertens. 2007;25(2):455-61. PubMed PMID: 17211254.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Therapeutic effects of angiotensin II type 1 receptor blocker at an advanced stage of hypertensive diastolic heart failure. AU - Nishio,Mayu, AU - Sakata,Yasushi, AU - Mano,Toshiaki, AU - Yoshida,Junichi, AU - Ohtani,Tomohito, AU - Takeda,Yasuharu, AU - Miwa,Takeshi, AU - Masuyama,Tohru, AU - Yamamoto,Kazuhiro, AU - Hori,Masatsugu, PY - 2007/1/11/pubmed PY - 2007/3/3/medline PY - 2007/1/11/entrez SP - 455 EP - 61 JF - Journal of hypertension JO - J. Hypertens. VL - 25 IS - 2 N2 - OBJECTIVE: Angiotensin II type 1 receptor blocker (ARB) is increasingly prescribed for the treatment of systolic heart failure with a growing body of clinical evidence. The roles of ARB, however, remain to be clarified in the treatment of diastolic heart failure (DHF), particularly at its advanced stage. This experimental study investigated the effects of ARB administered at an advanced stage of hypertensive DHF. METHODS: Dahl salt-sensitive rats fed an 8% NaCl diet from age 7 weeks represent overt DHF at age 20 weeks, as noted in previous studies (hypertensive DHF model). The DHF model rats were randomly divided into two groups at age 17 weeks when left ventricular diastolic dysfunction, hypertrophy, fibrosis, macrophage infiltration and reactive oxygen species generation were already augmented; six rats treated for 3 weeks with a subdepressor dose of ARB (olmesartan 0.6 mg/kg per day), and six untreated rats. RESULTS: The 3-week administration of ARB significantly decreased the left ventricular end-diastolic pressure in association with attenuation of left ventricular hypertrophy, fibrosis and diastolic dysfunction. Macrophage infiltration was attenuated with decreased gene expression of transforming growth factor-beta1 and monocyte chemoattractant protein-1 in the left ventricular myocardium of the ARB-treated rats. The production of reactive oxygen species also decreased with NADPH oxidase activity. CONCLUSIONS: ARB provides beneficial effects in hypertensive DHF independent of its antihypertensive effects even if initiated at an advanced stage. The beneficial effects are at least partly attributed to the attenuation of inflammatory changes and oxidative stress through the suppression of cytokine and chemokine production and of NADPH oxidase activity. SN - 0263-6352 UR - https://www.unboundmedicine.com/medline/citation/17211254/Therapeutic_effects_of_angiotensin_II_type_1_receptor_blocker_at_an_advanced_stage_of_hypertensive_diastolic_heart_failure_ L2 - http://dx.doi.org/10.1097/HJH.0b013e328010d635 DB - PRIME DP - Unbound Medicine ER -