Effect of heat-moisture treated brown rice crackers on postprandial flow-mediated dilation in adults with mild endothelial dysfunction

Kenichi Watanabe, Masao Hirayama, Somasundaram Arumugam, Masayoshi Sugawara, Hisanori Kato, Sumiko Nakamura, Ken'ichi Ohtsubo, Hitoshi Matsumoto, Yuri Nomi, Noriyuki Homma, Yoshifumi Fujii, Naoto Murohashi, Rajarajan A Thandavarayan, Hiroshi Suzuki, Kazuya Fujihara, Satoru Kodama, Hirohito Sone

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Endothelial dysfunction is an early pathophysiological feature and independent predictor of a poor prognosis in most forms of cardiovascular disease. We evaluated the effect of brown rice crackers (BR-C) on endothelial function. Methods: Effect of heat-moisture treated (HMT) -BR-C on postprandial flow-mediated dilation (FMD) in adults with mild endothelial dysfunction was compared with that of BR-C and white rice crackers (WR-C) in 12 adults with mild endothelial dysfunction (less than 7.0% of FMD) by a randomized, single-blind, three-treatment three-period crossover trial (UMIN 000034898). Since we considered that the FMD increase was associated with the treatment of HMT-BR-C, we examined the effect of three possible factors: postprandial glucose levels, polyphenol content, and polyphenol release from the food matrix. Results: Mean pre-intake baseline FMD values of HMT-BR-C, BR-C, and WR-C were 4.9%, 5.1%, and 4.9%, respectively, and those values 1 h post-intake were 6.3%, 5.1%, and 4.8%, respectively. There was no difference in intergroup comparisons of FMD using Dunnett's multiple comparison test. There was a significant increase in FMD only in HMT-BR-C in intragroup comparisons (P = 0.042 by paired-t test). In comparison with BR-C, no significant difference was noted in the postprandial glucose level nor in the content of total polyphenols and ferulic acid derivatives in HMT-BR-C. However, the 70% ethanol extracted from HMT-BR-C contained a significantly larger amount of free and bound ferulic acids than from BR-C. Conclusion: HMT-BR-C intake increased the postprandial FMD response.

Original languageEnglish (US)
Article numbere10284
JournalHeliyon
Volume8
Issue number8
DOIs
StatePublished - Aug 2022

Keywords

  • Blood glucose
  • Crossover trial
  • Flow-mediated dilation (FMD)
  • Heat-moisture treated (HMT) brown rice cracker
  • Polyphenols

ASJC Scopus subject areas

  • General

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