著者

Song-Gyu RA Hironari NAKAGAWA Yuki TOMIGA Hiroki IIZAWA Shihoko NAKASHIMA Yasuki HIGAKI Kentaro KAWANAKA

出版者

Center for Academic Publications Japan

雑誌

Journal of Nutritional Science and Vitaminology (ISSN:03014800)

巻号頁・発行日

vol.68, no.4, pp.243-249, 2022-08-31 (Released:2022-08-31)

参考文献数

32

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We examined the effects of dietary vitamin D deficiency on markers of mitochondrial biogenesis and dynamics in rat soleus muscle. Male Wistar rats were fed a chow with no vitamin D (No-D; 0 IU/kg) or a moderate dose (Mod-D; 2,000 IU/kg) of vitamin D chow for 8 wk. Compared to the Mod-D group, at 8 wk the No-D group showed significantly lower serum 25(OH)D levels. Although vitamin D deficiency had no effect on body composition, the No-D rats showed significantly decreased levels of PGC-1α, a marker of skeletal muscle mitochondrial biogenesis, and DRP1, a marker of skeletal muscle mitochondrial fission. The change in the PGC-1α protein expression and the serum 25(OH)D concentrations were significantly correlated. The change in DRP1 protein expression and the serum 25(OH)D concentrations tended to be correlated. There was no significant between-group difference in markers of mitochondrial fusion (MFN2 and OPA1) and mitophagy (PARKIN) in soleus muscle, and no relationship with serum 25(OH)D concentrations. Collectively our findings suggest that dietary vitamin D deficiency decreased PGC-1α and DRP1 protein expression in rat soleus muscle.

著者

Megumi Hara Yuichiro Nishida Keitaro Tanaka Chisato Shimanoe Kayoko Koga Takuma Furukawa Yasuki Higaki Koichi Shinchi Hiroaki Ikezaki Masayuki Murata Kenji Takeuchi Takashi Tamura Asahi Hishida Mineko Tsukamoto Yuka Kadomatsu Keitaro Matsuo Isao Oze Mikami Haruo Kusakabe Miho Toshiro Takezaki Rie Ibusuki Sadao Suzuki Hiroko Nakagawa-Senda Daisuke Matsui Teruhide Koyama Kiyonori Kuriki Naoyuki Takashima Yasuyuki Nakamura Kokichi Arisawa Sakurako Katsuura-Kamano Kenji Wakai

出版者

Japan Epidemiological Association

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

pp.JE20210155, (Released:2021-10-16)

参考文献数

49

被引用文献数

6

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Background: Little is known about whether insufficient moderate-to-vigorous physical activity (MVPA) and longer sedentary behavior (SB) are independently associated with estimated glomerular filtration rate (eGFR) and CKD, whether they interact with known risk factors for CKD, and the effect of replacing sedentary time with an equivalent duration of physical activity on kidney function.Methods: We examined the cross-sectional association of MVPA and SB with eGFR and CKD in 66,603 Japanese cohort study in 14 areas from 2004 to 2013. MVPA and SB were estimated using a self-reported questionnaire, and CKD was defined as eGFR<60 mL/min/1.73 m2. Multiple linear regression analyses, logistic regression analyses, and an isotemporal substitution model were applied.Results: After adjusting for potential confounders, higher MVPA and longer SB were independently associated with higher eGFR (Pfor trend MVPA<0.0001) and lower eGFR (Pfor trend SB<0.0001), and a lower odds ratio (OR) of CKD (adjusted OR of MVPA≥20 MET·h/day: 0.76 [95%CI: 0.68–0.85] compared to MVPA<5 MET·h/day) and a higher OR of CKD (adjusted OR of SB≥16 h/day: 1.81 [95%CI: 1.52–2.15] compared to SB<7 h/day), respectively. The negative association between MVPA and CKD was stronger in men, and significant interactions between sex and MVPA were detected. Replacing 1 hour of SB with 1 hour of physical activity was associated with about 3 to 4% lower OR of CKD.Conclusions: These findings indicate that replacing SB with physical activity may benefit kidney function, especially in men, adding to the possible evidence on CKD prevention.

著者

Ryoma Michishita Takuro Matsuda Shotaro Kawakami Akira Kiyonaga Hiroaki Tanaka Natsumi Morito Yasuki Higaki

出版者

日本疫学会

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

vol.26, no.7, pp.378-385, 2016-07-05 (Released:2016-07-05)

参考文献数

36

被引用文献数

1 30

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Background: This cross-sectional study evaluated the association between unhealthy lifestyle behaviors and the prevalence of chronic kidney disease (CKD) in middle-aged and older men.Methods: The subjects included 445 men without a history of cardiovascular disease, stroke, or dialysis treatment, who were not taking medications. Unhealthy lifestyle behaviors were evaluated using a standardized self-administered questionnaire and were defined as follows: 1) lack of habitual moderate exercise, 2) lack of daily physical activity, 3) slow walking speed, 4) fast eating speed, 5) late-night dinner, 6) bedtime snacking, and 7) skipping breakfast. The participants were divided into four categories, which were classified into quartile distributions based on the number of unhealthy lifestyle behaviors (0–1, 2, 3, and ≥4 unhealthy behaviors).Results: According to a multivariate analysis, the odds ratio (OR) for CKD (defined as estimated glomerular filtration rate [eGFR] <60 mL/min/1.73 m2 and/or proteinuria) was found to be significantly higher in the ≥4 group than in the 0–1 group (OR 4.67; 95% confidence interval [CI], 1.51–14.40). Moreover, subjects’ lack of habitual moderate exercise (OR 3.06; 95% CI, 1.13–8.32) and presence of late-night dinner (OR 2.84; 95% CI, 1.40–5.75) and bedtime snacking behaviors (OR 2.87; 95% CI, 1.27–6.45) were found to be significantly associated with the prevalence of CKD.Conclusions: These results suggest that an accumulation of unhealthy lifestyle behaviors, especially those related to lack of habitual moderate exercise and presence of late-night dinner and bedtime snacking may be associated with the prevalence of CKD.

著者

Yuichiro Nishida Minako Iyadomi Yasuki Higaki Hiroaki Tanaka Yoshiaki Kondo Hiromi Otsubo Mikako Horita Megumi Hara Keitaro Tanaka

出版者

The Japanese Society of Internal Medicine

雑誌

Internal Medicine (ISSN:09182918)

巻号頁・発行日

vol.54, no.4, pp.359-366, 2015 (Released:2015-02-15)

参考文献数

45

被引用文献数

10 10

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Objective A lower frequency for the peroxisome proliferator-activated receptor γ coactivator 1α (PPARGC1A) Ser482 allele has been reported in elite-level endurance athletes among Caucasians, although this gene polymorphism has not been found to be associated with aerobic capacity in German, Dutch or Chinese populations. The purpose of the current study was to examine the associations between the Gly482Ser polymorphism and aerobic fitness in 112 Japanese middle-aged men. Methods The PPARGC1AGly482Ser polymorphism was identified according to a TaqMan® SNP genotyping assay. Habitual physical activity was objectively measured using an accelerometer. The lactate threshold (LT), an index of aerobic fitness, was measured based on a submaximal graded exercise test performed on an electric cycle ergometer. The association between the LT and the Gly482Ser polymorphism was assessed according to a multiple regression analysis and analysis of covariance, with adjustment for potential confounders (age, body mass index, cigarette smoking, physical activity level and regular exercise). Results A significant association was observed between the PPARGC1AGly482Ser polymorphism and LT, as carriers of the Ser482 had higher LT values than the Gly482 carriers. Conclusion The current results suggest that the PPARGC1ASer482 allele is associated with a higher aerobic capacity in Japanese middle-aged men.

著者

Megumi Hara Yuichiro Nishida Keitaro Tanaka Chisato Shimanoe Kayoko Koga Takuma Furukawa Yasuki Higaki Koichi Shinchi Hiroaki Ikezaki Masayuki Murata Kenji Takeuchi Takashi Tamura Asahi Hishida Mineko Tsukamoto Yuka Kadomatsu Keitaro Matsuo Isao Oze Haruo Mikami Miho Kusakabe Toshiro Takezaki Rie Ibusuki Sadao Suzuki Hiroko Nakagawa-Senda Daisuke Matsui Teruhide Koyama Kiyonori Kuriki Naoyuki Takashima Yasuyuki Nakamura Kokichi Arisawa Sakurako Katsuura-Kamano Kenji Wakai

出版者

Japan Epidemiological Association

雑誌

Journal of Epidemiology (ISSN:09175040)

巻号頁・発行日

vol.33, no.6, pp.285-293, 2023-06-05 (Released:2023-06-05)

参考文献数

49

被引用文献数

6

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Background: Little is known about whether insufficient moderate-to-vigorous physical activity (MVPA) and longer sedentary behavior (SB) are independently associated with estimated glomerular filtration rate (eGFR) and chronic kidney disease (CKD), whether they interact with known risk factors for CKD, and the effect of replacing sedentary time with an equivalent duration of physical activity on kidney function.Methods: We examined the cross-sectional association of MVPA and SB with eGFR and CKD in 66,603 Japanese cohort study in 14 areas from 2004 to 2013. MVPA and SB were estimated using a self-reported questionnaire, and CKD was defined as eGFR <60 mL/min/1.73 m2. Multiple linear regression analyses, logistic regression analyses, and an isotemporal substitution model were applied.Results: After adjusting for potential confounders, higher MVPA and longer SB were independently associated with higher eGFR (P for trend MVPA <0.0001) and lower eGFR (P for trend SB <0.0001), and a lower odds ratio (OR) of CKD (adjusted OR of MVPA ≥20 MET·h/day, 0.76; 95% confidence interval [CI], 0.68–0.85 compared to MVPA <5 MET·h/day) and a higher OR of CKD (adjusted OR of SB ≥16 h/day, 1.81; 95% CI, 1.52–2.15 compared to SB <7 h/day), respectively. The negative association between MVPA and CKD was stronger in men, and significant interactions between sex and MVPA were detected. Replacing 1 hour of SB with 1 hour of physical activity was associated with about 3 to 4% lower OR of CKD.Conclusion: These findings indicate that replacing SB with physical activity may benefit kidney function, especially in men, adding to the possible evidence on CKD prevention.

著者

Yukiya Tanoue Takaaki Komiyama Hiroaki Tanaka Yasuki Higaki Yoshinari Uehara

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

The Journal of Physical Fitness and Sports Medicine (ISSN:21868131)

巻号頁・発行日

vol.10, no.4, pp.181-189, 2021-07-25 (Released:2021-07-15)

参考文献数

35

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After exercise training, improvement in cognitive function is associated with high parasympathetic nervous activity. However, the relationship between cardiac autonomic nervous activity and cognitive function after acute exercise may differ from that after chronic exercise, because parasympathetic nervous activity decreases with acute exercise. Here, we examined the relationship between parasympathetic nervous activity and cognitive function after acute exercise. Twelve male participants performed cognitive tasks in exercise and non-exercise conditions, with a randomized crossover design. Participants in the exercise condition ran on a treadmill for 10 min, with a running speed corresponding to a rate of perceived exertion (RPE) of 10–12 in each subject. Cognitive tasks were performed before and after both conditions. Heart rate variability during cognitive tasks was measured to evaluate autonomic nervous system activity. In the exercise condition, RPE was 11.1 ± 0.2 (mean ± SE) immediately after exercise. Exercise at RPE 10–12 improved reaction times in Go trials (from 687.8 ± 55.2 to 568.2 ± 45.9 ms, P < 0.05). In the non-exercise condition, cognitive performance remained stable throughout the experiment. In addition, parasympathetic nervous activity (high-frequency component of heart rate variability) remained low after exercise compared with before exercise (from 586.4 ± 122.5 to 372.8 ± 92.9 ms2, P < 0.05). In contrast, parasympathetic nervous activity increased in the non-exercise condition (from 516.6 ± 94.9 ms2 to 642.5 ± 85.6 ms2, P < 0.05). The present results suggest that improvement in cognitive function after acute exercise may be related to reduced parasympathetic nervous activity.