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Effect of polyphenol-containing azuki bean (Vigna angularis) extract on blood pressure elevation and macrophage infiltration in the heart and kidney of spontaneously hypertensive rats.
Clin Exp Pharmacol Physiol. 2008 Jan; 35(1):43-9.CE

Abstract

1. Hypertension is a major risk factor for myocardial infarction and renal damage, and it has also been shown to have pro-inflammatory actions that increase the formation of reactive oxygen species. Macrophage infiltration has been suggested to play a role in the pathogenesis of hypertension. Azuki beans are known to contain pro-anthocyanidins, a group of polyphenolic bioflavonoids with remarkable radical-scavenging activities in vitro. Therefore, the aim of the present study was to investigate the effect of polyphenol-containing azuki bean extract (ABE) on systolic blood pressure (SBP) and macrophage infiltration in the heart and kidney of spontaneously hypertensive rats (SHR). 2. Spontaneously hypertensive rats and control normotensive Wistar-Kyoto (WKY) rats were divided into two groups fed either 0 or 0.8% ABE in their diets. Tail SBP and macrophage kinetics in the heart and kidney were examined. 3. The SBP of the SHR group was higher than that of age-matched WKY rats throughout the treatment period. After 8 weeks of treatment, the increased SBP in ABE-treated SHR was significantly less than that in untreated SHR. 4. Nicotinamide adenine dinucleotide (NADH) or nicotinamide adenine dinucleotide phosphate (NADPH)-stimulated superoxide (O2-) production was enhanced in the kidney and heart in SHR and WKY rats compared with levels in the absence of NADH or NADPH. The NADPH-stimulated superoxide (O2-) levels in the kidney in untreated SHR was significantly higher than that in untreated WKY rats. The (O2-) levels in ABE-treated SHR were significantly decreased compared with the untreated SHR group. 5. In immunohistochemical analyses, the number of macrophages in the heart and in the glomeruli and tubulointerstitium of the kidney was significantly higher in ABE-untreated SHR than in ABE-untreated WKY rats. Conversely, there was a significant decrease in the number of macrophages in ABE-treated SHR compared with the untreated SHR. There were significant positive correlations between SBP and the number of ED1-positive macrophages in the heart and tubulointerstitial and glomerular areas of the kidney in WKY rats and SHR. 6. In conclusion, the results of the present study suggest that ABE attenuates the elevation of SBP and macrophage infiltration in the heart, as well as in the glomeruli and tubulointerstitium of the kidney, in our SHR model.

Authors+Show Affiliations

Department of Life Sciences, Graduate School of Health Sciences, Aomori University of Health and Welfare, Aomori, Japan. s_sato3@auhw.ac.jpNo 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

18047626

Citation

Sato, Shin, et al. "Effect of Polyphenol-containing Azuki Bean (Vigna Angularis) Extract On Blood Pressure Elevation and Macrophage Infiltration in the Heart and Kidney of Spontaneously Hypertensive Rats." Clinical and Experimental Pharmacology & Physiology, vol. 35, no. 1, 2008, pp. 43-9.
Sato S, Mukai Y, Yamate J, et al. Effect of polyphenol-containing azuki bean (Vigna angularis) extract on blood pressure elevation and macrophage infiltration in the heart and kidney of spontaneously hypertensive rats. Clin Exp Pharmacol Physiol. 2008;35(1):43-9.
Sato, S., Mukai, Y., Yamate, J., Kato, J., Kurasaki, M., Hatai, A., & Sagai, M. (2008). Effect of polyphenol-containing azuki bean (Vigna angularis) extract on blood pressure elevation and macrophage infiltration in the heart and kidney of spontaneously hypertensive rats. Clinical and Experimental Pharmacology & Physiology, 35(1), 43-9.
Sato S, et al. Effect of Polyphenol-containing Azuki Bean (Vigna Angularis) Extract On Blood Pressure Elevation and Macrophage Infiltration in the Heart and Kidney of Spontaneously Hypertensive Rats. Clin Exp Pharmacol Physiol. 2008;35(1):43-9. PubMed PMID: 18047626.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of polyphenol-containing azuki bean (Vigna angularis) extract on blood pressure elevation and macrophage infiltration in the heart and kidney of spontaneously hypertensive rats. AU - Sato,Shin, AU - Mukai,Yuuka, AU - Yamate,Jyoji, AU - Kato,Jun, AU - Kurasaki,Masaaki, AU - Hatai,Asako, AU - Sagai,Masaru, PY - 2007/12/1/pubmed PY - 2008/1/25/medline PY - 2007/12/1/entrez SP - 43 EP - 9 JF - Clinical and experimental pharmacology & physiology JO - Clin Exp Pharmacol Physiol VL - 35 IS - 1 N2 - 1. Hypertension is a major risk factor for myocardial infarction and renal damage, and it has also been shown to have pro-inflammatory actions that increase the formation of reactive oxygen species. Macrophage infiltration has been suggested to play a role in the pathogenesis of hypertension. Azuki beans are known to contain pro-anthocyanidins, a group of polyphenolic bioflavonoids with remarkable radical-scavenging activities in vitro. Therefore, the aim of the present study was to investigate the effect of polyphenol-containing azuki bean extract (ABE) on systolic blood pressure (SBP) and macrophage infiltration in the heart and kidney of spontaneously hypertensive rats (SHR). 2. Spontaneously hypertensive rats and control normotensive Wistar-Kyoto (WKY) rats were divided into two groups fed either 0 or 0.8% ABE in their diets. Tail SBP and macrophage kinetics in the heart and kidney were examined. 3. The SBP of the SHR group was higher than that of age-matched WKY rats throughout the treatment period. After 8 weeks of treatment, the increased SBP in ABE-treated SHR was significantly less than that in untreated SHR. 4. Nicotinamide adenine dinucleotide (NADH) or nicotinamide adenine dinucleotide phosphate (NADPH)-stimulated superoxide (O2-) production was enhanced in the kidney and heart in SHR and WKY rats compared with levels in the absence of NADH or NADPH. The NADPH-stimulated superoxide (O2-) levels in the kidney in untreated SHR was significantly higher than that in untreated WKY rats. The (O2-) levels in ABE-treated SHR were significantly decreased compared with the untreated SHR group. 5. In immunohistochemical analyses, the number of macrophages in the heart and in the glomeruli and tubulointerstitium of the kidney was significantly higher in ABE-untreated SHR than in ABE-untreated WKY rats. Conversely, there was a significant decrease in the number of macrophages in ABE-treated SHR compared with the untreated SHR. There were significant positive correlations between SBP and the number of ED1-positive macrophages in the heart and tubulointerstitial and glomerular areas of the kidney in WKY rats and SHR. 6. In conclusion, the results of the present study suggest that ABE attenuates the elevation of SBP and macrophage infiltration in the heart, as well as in the glomeruli and tubulointerstitium of the kidney, in our SHR model. SN - 1440-1681 UR - https://www.unboundmedicine.com/medline/citation/18047626/Effect_of_polyphenol_containing_azuki_bean__Vigna_angularis__extract_on_blood_pressure_elevation_and_macrophage_infiltration_in_the_heart_and_kidney_of_spontaneously_hypertensive_rats_ L2 - https://doi.org/10.1111/j.1440-1681.2007.04743.x DB - PRIME DP - Unbound Medicine ER -