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Dietary Cocoa Prevents Aortic Remodeling and Vascular Oxidative Stress in Diabetic Rats
Author(s) -
ÁlvarezCilleros David,
LópezOliva Maria Elvira,
MoralesCano Daniel,
Barreira Bianca,
PérezVizcaíno Francisco,
Goya Luis,
Ramos Sonia,
Martín María Ángeles
Publication year - 2019
Publication title -
molecular nutrition and food research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.495
H-Index - 131
eISSN - 1613-4133
pISSN - 1613-4125
DOI - 10.1002/mnfr.201900044
Subject(s) - oxidative stress , medicine , diabetes mellitus , endocrinology , reactive oxygen species , nadph oxidase , pulse wave velocity , chemistry , blood pressure , biochemistry
Scope The aim of the present study is to investigate the potential protective effect of a cocoa‐rich diet on functional and structural vascular alterations in diabetes and the mechanism involved. Methods and results Male Zucker diabetic fatty (ZDF) rats are fed on a standard (ZDF‐C) or cocoa‐rich diet (ZDF‐Co) from week 10 to 20 of life. Diabetic ZDF‐C rats showed increased blood pressure and enhanced aortic stiffness, as demonstrated by the increased pulse pressure and the augmented aortic medial thickness with loss and disruption of elastic fibres. Interestingly, cocoa intake strongly avoided all these adverse effects and reduced aortic oxidative stress. Mechanistically, cocoa diet prevented sirtuin‐1 (SIRT‐1) depletion and increased NADPH oxidases (NOXs) and reactive oxygen species production as well as reduced active nuclear factor E2 related factor 2 (Nrf2) and their antioxidant products. Conclusion The results demonstrate for the first time that a cocoa‐rich diet strongly prevents aortic stiffening and remodeling in diabetic animals and avoids aortic oxidative stress. It is suggested that this effect could be mediated via its effects on SIRT‐1, NOXs, and Nrf2.