Calorie restriction improves cognitive decline via up-regulation of brain-derived neurotrophic factor: Tropomyosin-related kinase B in hippocampus of obesity-induced hypertensive rats

Takuya Kishi, Yoshitaka Hirooka, Tomomi Nagayama, Kengo Isegawa, Masato Katsuki, Ko Takesue, Kenji Sunagawa

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

In metabolic syndrome (MetS), previous studies have suggested that cognitive decline is worsened. Among the factors associated with cognition, decreased brain-derived neurotrophic factor (BDNF) in the hippocampus causes cognitive decline. We previously reported that exercise training with calorie restriction yielded protection against cognitive decline via BDNF in the hippocampus of hypertensive rats. The aim of the present study was to determine whether or not calorie restriction results in protection against cognitive decline via BDNF and its receptor tropomyosin-related kinase B (TrkB) in the hippocampus of MetS model rats. We divided dietary-induced obesity-prone and hypertensive rats (OP), as metabolic syndrome model rats, into three groups, fed with a high fat diet (HF), treated with calorie restriction (CR) plus vehicle, and treated with CR and ANA-12 (a TrkB antagonist) (CR+A). After treatment for 28 days, body weight, insulin, fasting blood glucose, adiponectin, systolic blood pressure, and oxidative stress in the hippocampus were signifcantly lower, and BDNF expression in the hippocampus was signifcantly higher in CR and CR+A than in HF. Cognitive performance determined by the Morris water maze test was signifcantly higher in CR than in HF, whereas the beneft was attenuated in CR+A. In conclusion, calorie restriction protects against cognitive decline via up-regulation of BDNF/TrkB through an antioxidant effect in the hippocampus of dietary-induced obesity rats.

Original languageEnglish
Pages (from-to)110-115
Number of pages6
JournalInternational heart journal
Volume56
Issue number1
DOIs
Publication statusPublished - 2015

All Science Journal Classification (ASJC) codes

  • Cardiology and Cardiovascular Medicine

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