論文

査読有り 国際誌
2017年11月1日

Heart-bound adiponectin, not serum adiponectin, inversely correlates with cardiac hypertrophy in stroke-prone spontaneously hypertensive rats.

Experimental physiology
  • Takao Inoue
  • Kumiko Takemori
  • Nobuyuki Mizuguchi
  • Masatomo Kimura
  • Takaaki Chikugo
  • Man Hagiyama
  • Azusa Yoneshige
  • Tatsufumi Mori
  • Osamu Maenishi
  • Takashi Kometani
  • Tatsuki Itoh
  • Takao Satou
  • Akihiko Ito
  • 全て表示

102
11
開始ページ
1435
終了ページ
1447
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1113/EP086407

NEW FINDINGS: What is the central question of this study? An inverse correlation between circulating adiponectin and many diseases has been reported, but some studies have found no correlation. To evaluate this controversy, we investigated the relationship between heart-bound adiponectin and hypertension or cardiac hypertrophy, compared with serum adiponectin. What is the main finding and its importance? Using hypertensive and normotensive rats, we found that heart-bound adiponectin was inversely correlated with cardiac hypertrophy, suggesting that heart-bound adiponectin has a more important function in preventing cardiac hypertrophy than circulating adiponectin. Our study provides new insights regarding the role of adiponectin in diseases. The inverse correlation between circulating adiponectin concentration and hypertension or cardiac hypertrophy is still controversial. In addition to circulating adiponectin, adiponectin is also bound to tissues such as the heart and skeletal muscle. In this study, we investigated the relationship of serum adiponectin and heart-bound adiponectin with hypertension and cardiac hypertrophy. Four types of hypertensive rats presenting different blood pressure levels were used at different ages, as follows: normotensive Wistar-Kyoto rats (WKYs); two sub-strains (strains C and B2, having low and high blood pressure, respectively) of spontaneously hypertensive rats (SHRs); and stroke-prone SHRs (SHRSPs). Blood pressure, heart-to-body weight ratio, serum adiponectin and heart-bound adiponectin were determined. Histopathological analysis of the heart was carried out to evaluate the relationship with heart-bound adiponectin. Serum adiponectin concentration was not inversely correlated with blood pressure or heart-to-body weight ratio. In contrast, heart-bound adiponectin levels were significantly lower in SHRSPs than in other strains at respective ages. This resulted from a decrease in T-cadherin expression, which induced adiponectin binding to tissues. No significant difference in heart-bound adiponectin among WKYs and SHRs (C and B2) was detected, indicating that heart-bound adiponectin is not related to hypertension. In addition, differences in heart-bound adiponectin did not affect AMP-activated protein kinase in the traditional adiponectin activation cascade. Histopathological analysis revealed that heart-bound adiponectin was inversely correlated with cardiomyocyte hypertrophy and left ventricular wall thickness and, in part, with cardiac fibrosis. These results suggest that the decreased level of heart-bound adiponectin in SHRSPs is more related to their cardiac hypertrophy than circulating adiponectin.

リンク情報
DOI
https://doi.org/10.1113/EP086407
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/28841247
ID情報
  • DOI : 10.1113/EP086407
  • ISSN : 0958-0670
  • PubMed ID : 28841247

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