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Erschienen in: Diabetologia 6/2017

28.03.2017 | Article

Long-term dietary nitrite and nitrate deficiency causes the metabolic syndrome, endothelial dysfunction and cardiovascular death in mice

verfasst von: Mika Kina-Tanada, Mayuko Sakanashi, Akihide Tanimoto, Tadashi Kaname, Toshihiro Matsuzaki, Katsuhiko Noguchi, Taro Uchida, Junko Nakasone, Chisayo Kozuka, Masayoshi Ishida, Haruaki Kubota, Yuji Taira, Yuichi Totsuka, Shin-ichiro Kina, Hajime Sunakawa, Junichi Omura, Kimio Satoh, Hiroaki Shimokawa, Nobuyuki Yanagihara, Shiro Maeda, Yusuke Ohya, Masayuki Matsushita, Hiroaki Masuzaki, Akira Arasaki, Masato Tsutsui

Erschienen in: Diabetologia | Ausgabe 6/2017

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Abstract

Aims/hypothesis

Nitric oxide (NO) is synthesised not only from l-arginine by NO synthases (NOSs), but also from its inert metabolites, nitrite and nitrate. Green leafy vegetables are abundant in nitrate, but whether or not a deficiency in dietary nitrite/nitrate spontaneously causes disease remains to be clarified. In this study, we tested our hypothesis that long-term dietary nitrite/nitrate deficiency would induce the metabolic syndrome in mice.

Methods

To this end, we prepared a low-nitrite/nitrate diet (LND) consisting of an amino acid-based low-nitrite/nitrate chow, in which the contents of l-arginine, fat, carbohydrates, protein and energy were identical with a regular chow, and potable ultrapure water. Nitrite and nitrate were undetectable in both the chow and the water.

Results

Three months of the LND did not affect food or water intake in wild-type C57BL/6J mice compared with a regular diet (RD). However, in comparison with the RD, 3 months of the LND significantly elicited visceral adiposity, dyslipidaemia and glucose intolerance. Eighteen months of the LND significantly provoked increased body weight, hypertension, insulin resistance and impaired endothelium-dependent relaxations to acetylcholine, while 22 months of the LND significantly led to death mainly due to cardiovascular disease, including acute myocardial infarction. These abnormalities were reversed by simultaneous treatment with sodium nitrate, and were significantly associated with endothelial NOS downregulation, adiponectin insufficiency and dysbiosis of the gut microbiota.

Conclusions/interpretation

These results provide the first evidence that long-term dietary nitrite/nitrate deficiency gives rise to the metabolic syndrome, endothelial dysfunction and cardiovascular death in mice, indicating a novel pathogenetic role of the exogenous NO production system in the metabolic syndrome and its vascular complications.
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Metadaten
Titel
Long-term dietary nitrite and nitrate deficiency causes the metabolic syndrome, endothelial dysfunction and cardiovascular death in mice
verfasst von
Mika Kina-Tanada
Mayuko Sakanashi
Akihide Tanimoto
Tadashi Kaname
Toshihiro Matsuzaki
Katsuhiko Noguchi
Taro Uchida
Junko Nakasone
Chisayo Kozuka
Masayoshi Ishida
Haruaki Kubota
Yuji Taira
Yuichi Totsuka
Shin-ichiro Kina
Hajime Sunakawa
Junichi Omura
Kimio Satoh
Hiroaki Shimokawa
Nobuyuki Yanagihara
Shiro Maeda
Yusuke Ohya
Masayuki Matsushita
Hiroaki Masuzaki
Akira Arasaki
Masato Tsutsui
Publikationsdatum
28.03.2017
Verlag
Springer Berlin Heidelberg
Erschienen in
Diabetologia / Ausgabe 6/2017
Print ISSN: 0012-186X
Elektronische ISSN: 1432-0428
DOI
https://doi.org/10.1007/s00125-017-4259-6

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