論文

基本情報

氏名 兒玉 朋子
氏名(カナ) コダマ トモコ
氏名(英語) Kodama Tomoko
所属 獣医学部 獣医学科
職名 助教
researchmap研究者コード R000034570
researchmap機関 岡山理科大学

題名

Human omentin-1 reduces vascular insulin resistance and hypertension in Otsuka Long-Evans Tokushima Fatty rats

単著・共著の別

著者

Yuta Okamura, Ko Adachi, Ryo Niijima, Tomoko Kodama, Kosuke Otani, Muneyoshi Okada, Hideyuki Yamawaki

概要

PURPOSE: Hypertension is one of the major risk factors for renal failure and cardiovascular diseases, and is caused by various abnormalities including the contractility of blood vessels. Otsuka Long-Evans Tokushima Fatty (OLETF) rats, which mimic human type 2 diabetes, are frequently used to study obesity-induced insulin resistance (IR) and hypertension. Human omentin-1 is one of the recently identified adipocytokines. We previously demonstrated that human omentin-1 not only caused vasodilation in rat isolated blood vessels, but also prevented inflammatory responses, a possible mechanism relating IR, in human vascular endothelial cells. Taken together, we hypothesized that human omentin-1 may reduce obesity-induced IR and hypertension in OLETF rats. METHODS: OLETF rats were intraperitoneally administered with human omentin-1 for 7 days. RESULTS: Human omentin-1 had no influence on overweight, hyperglycemia, urinary glucose extraction, hyperinsulinemia, and systemic IR in OLETF rats. Human omentin-1 decreased systolic blood pressure in OLETF rats. The measurement of isometric contraction revealed that human omentin-1 had no influence on the agonist-induced contractile and relaxant responses in isolated thoracic aorta from OLETF rats. However, the relaxant response mediated by human insulin was converted into the contractile response in thoracic aorta from OLETF rats, which was prevented by human omentin-1. The Western blotting revealed that human omentin-1 improved the decrease in endothelial nitric oxide synthase activation in isolated thoracic aorta from OLETF rats. CONCLUSION: In summary, we for the first time revealed that human omentin-1 partly reduces vascular IR and thereby inhibits hypertension in OLETF rats.

発表雑誌等の名称

Naunyn-Schmiedeberg's archives of pharmacology

出版者

397

5

開始ページ

3379

終了ページ

3387

発行又は発表の年月

2024/03

査読の有無

有り

招待の有無

無し

記述言語

英語

掲載種別

研究論文(学術雑誌)

ISSN

ID:DOI

10.1007/s00210-023-02795-w

ID:NAID(CiNiiのID)

ID:PMID

37955693

JGlobalID

arXiv ID

ORCIDのPut Code

DBLP ID