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Watanabe D, Yoshida T, Nanri H, Watanabe Y, Itoi A, Goto C, Ishikawa-Takata K, Yamada Y, Fujita H, Miyachi M, Kimura M. Dose-Response Relationships between Diet Quality and Mortality among Frail and Non-Frail Older Adults: A Population-Based Kyoto-Kameoka Prospective Cohort Study. J Nutr Health Aging 2023; 27:1228-1237. [PMID: 38151874 DOI: 10.1007/s12603-023-2041-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 11/12/2023] [Indexed: 12/29/2023]
Abstract
OBJECTIVES Although better diet quality is inversely associated with mortality risk, the association between diet quality and mortality remains unclear in frail and non-frail older adults. Thus, we aimed to examine this association in older Japanese adults. DESIGN A prospective cohort study. SETTING AND PARTICIPANTS We used the data of 8,051 Japanese older adults aged ≥65 years in the Kyoto-Kameoka study. MESUREMENTS Dietary intake was estimated using a validated food frequency questionnaire. Diet quality was evaluated by calculating the adherence scores to the Japanese Food Guide Spinning Top (range, 0 [worst] to 80 [best]), which were stratified into quartiles. Frailty status was assessed using the validated self-administered Kihon Checklist (KCL) and the Fried phenotype (FP) model. Survival data were collected between February 15, 2012 and November 30, 2016. Statistical analysis was performed using the multivariate Cox proportional hazard analysis and the spline model. RESULTS During the median 4.75-year follow-up (36,552 person-years), we recorded 661 deaths. After adjusting for confounders, compared with the bottom adherence score quartile, the top quartile was associated with lower hazard ratio (HR) of mortality in frailty (HR, 0.73; 95% confidence interval [CI], 0.54-1.00) and non-frailty, as defined by the KCL (HR, 0.72; 95% CI, 0.52-1.01). In the spline model, regardless of frailty status defined by the KCL and FP model, adherence score showed a strongly dose-dependent inverse association with mortality up to approximately 55 points; however, no significant differences were observed thereafter. This association was similar to the results obtained in individuals with physical, cognitive, and depression as domains of KCL in the spline model. CONCLUSIONS Our findings demonstrate an L-shaped association between diet quality and mortality in both frail and non-frail individuals. This study may provide important knowledge for improving poor diet quality in older individuals with frailty or domains of frailty.
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Affiliation(s)
- D Watanabe
- Daiki Watanabe, RD, PhD, Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa-city, Saitama 359-1192, Japan. Tel.: +81-4-2947-6936. E-mail:
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Miyachi M, Zhu W, Nakae T, Yamanoi Y, Ikuta T, Maehashi K, Nishihara H. Dirac-point Shift of Graphene-FET in the Presence of Ionic Molecules or Surfactants. CHEM LETT 2021. [DOI: 10.1246/cl.210310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Mariko Miyachi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Wenchao Zhu
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Toyotaka Nakae
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yoshinori Yamanoi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Takashi Ikuta
- Division of Advanced Applied Physics, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Kenzo Maehashi
- Division of Advanced Applied Physics, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
| | - Hiroshi Nishihara
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Research Center for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
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Yamada Y, Yoshida T, Nakagata T, Nanri H, Miyachi M. Letter to the Editor: Age, Sex, and Regional Differences in the Effect of COVID-19 Pandemic on Objective Physical Activity in Japan: A 2-Year Nationwide Longitudinal Study. J Nutr Health Aging 2021; 25:1032-1033. [PMID: 34545926 PMCID: PMC8322639 DOI: 10.1007/s12603-021-1662-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 06/23/2021] [Indexed: 11/27/2022]
Affiliation(s)
- Y Yamada
- Yosuke Yamada, PhD, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8636 Japan,
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Zhu W, Salles R, Miyachi M, Yamanoi Y, Tomo T, Takahashi H, Nishihara H. Photoelectric Conversion System Composed of Gene-Recombined Photosystem I and Platinum Nanoparticle Nanosheet. Langmuir 2020; 36:6429-6435. [PMID: 32396731 DOI: 10.1021/acs.langmuir.0c00647] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Photosynthesis is one of the most vital processes in nature, which consists of two main photoreaction centers called photosystem I and photosystem II. The high quantum yield of photosystem I (PSI) makes it attractive for bioelectronic applications. However, the native PSI (N-PSI) loses its robust photochemical properties once fabricated into devices. This property degradation results from the difficulty in controlling the orientation of PSI. With the optimal orientation of PSI, photoexcited electrons can easily reach the electrode, yielding good photoelectric conversion efficiency. We developed a novel photoelectrode by integrating a newly designed gene-recombined PSI (G-PSI) with platinum nanoparticles (PtNPs) on substrates using a simple stacking method, which can control the orientation of PSI on the electrode. The target orientation of the attached G-PSI toward the substrate was confirmed by the absorption spectra of polarized light. An approximately 2-fold increase in the internal quantum yield (IQY) was observed for the G-PSI-attached electrode under 680 nm irradiation compared with that of the N-PSI-modified electrode. In addition, a 4-fold enhancement of the IQY was detected for cytochrome c (Cyt c) stacking on the G-PSI because of the electrostatic interaction, suggesting that Cyt c successfully secured the electron-transfer pathway.
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Affiliation(s)
- Wenchao Zhu
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Raphaël Salles
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Mariko Miyachi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yoshinori Yamanoi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tatsuya Tomo
- Department of Biology, Faculty of Science, Tokyo University of Science, Kagurazaka 1-3, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Hiromi Takahashi
- Optical Application Research, System Instruments CO., LTD., Tokyo 192-0031, Japan
| | - Hiroshi Nishihara
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Nishiori D, Zhu W, Salles R, Miyachi M, Yamanoi Y, Ikuta T, Maehashi K, Tomo T, Nishihara H. Photosensing System Using Photosystem I and Gold Nanoparticle on Graphene Field-Effect Transistor. ACS Appl Mater Interfaces 2019; 11:42773-42779. [PMID: 31625385 DOI: 10.1021/acsami.9b14771] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this study, a light sensor is fabricated based on photosystem I (PSI) and a graphene field-effect transistor (FET) that detects light at a high quantum yield under ambient conditions. We immobilized PSI on a micrometer-sized graphene FET using Au nanoparticles (AuNPs) and measured the I-V characteristics of the modified graphene FET before and after light irradiation. The source-drain current (Isd) increased upon illumination, exhibiting a photoresponsivity of 4.8 × 102 A W-1, and the charge neutrality point of graphene shifted by -12 mV. This system represents the first successful photosensing system based on proteins and a solution-gated graphene FET. The probable mechanism of this negative shift can be explained by the increase in negative charge carriers in graphene induced by a hole trap in the AuNP resulting from electron transfer from the AuNP to PSI. Photoresponses were only observed in the presence of two surface-active agents, n-hexyltrimethylammonium bromide and sodium dodecylbenzenesulfonate, because they caused the formation of a hydrophobic environment on the surface of the graphene. The lipid layer of these agents caused dissociation of ascorbate ions from the graphene sheet, thereby expanding the Debye screening length of the electrolyte solution. The hydrophobic environment above graphene also enhanced hole storage in the AuNP through electron transfer from the AuNP to PSI.
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Affiliation(s)
- Daiki Nishiori
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
| | - Wenchao Zhu
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
| | - Raphaël Salles
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
| | - Mariko Miyachi
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
| | - Yoshinori Yamanoi
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
| | - Takashi Ikuta
- Division of Advanced Applied Physics, Institute of Engineering , Tokyo University of Agriculture and Technology , 2-24-16 Nakacho , Koganei, Tokyo 184-8588 , Japan
| | - Kenzo Maehashi
- Division of Advanced Applied Physics, Institute of Engineering , Tokyo University of Agriculture and Technology , 2-24-16 Nakacho , Koganei, Tokyo 184-8588 , Japan
| | - Tatsuya Tomo
- Department of Biology, Faculty of Science , Tokyo University of Science , Kagurazaka 1-3 , Shinjuku-ku, Tokyo 162-8601 , Japan
| | - Hiroshi Nishihara
- Department of Chemistry, School of Science , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-0033 , Japan
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6
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Miyachi M, Okuzono K, Nishiori D, Yamanoi Y, Tomo T, Iwai M, Allakhverdiev SI, Nishihara H. A Photochemical Hydrogen Evolution System Combining Cyanobacterial Photosystem I and Platinum Nanoparticle-terminated Molecular Wires. CHEM LETT 2017. [DOI: 10.1246/cl.170576] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Mariko Miyachi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033
| | - Kyoko Okuzono
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033
| | - Daiki Nishiori
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033
| | - Yoshinori Yamanoi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033
| | - Tatsuya Tomo
- Department of Biology, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601
| | - Masako Iwai
- School of Life Science and Technology, Tokyo Institute of Technology, 4259-B65, Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8501
| | - Suleyman I. Allakhverdiev
- Controlled Photobiosynthesis Laboratory, Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya Street 35, Moscow 127276, Russia
- Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region 142290, Russia
- Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory 1-12, Moscow 119991, Russia
| | - Hiroshi Nishihara
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033
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Miyamoto-Mikami E, Zempo H, Fuku N, Kikuchi N, Miyachi M, Murakami H. Heritability estimates of endurance-related phenotypes: A systematic review and meta-analysis. Scand J Med Sci Sports 2017; 28:834-845. [PMID: 28801974 DOI: 10.1111/sms.12958] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2017] [Indexed: 11/30/2022]
Abstract
The aim of this study was to clarify heritability estimates for endurance-related phenotypes and the underlying factors affecting these estimates. A systematic literature search was conducted for studies reporting heritability estimates of endurance-related phenotypes using the PubMed database (up to 30 September 2016). Studies that estimated the heritability of maximal oxygen uptake (V˙O2max), submaximal endurance phenotypes, and endurance performance were selected. The weighted mean heritability for endurance-related phenotypes was calculated using a random-effects model. A total of 15 studies were selected via a systematic review. Meta-analysis revealed that the weighted means of the heritability of V˙O2max absolute values and those adjusted for body weight and for fat-free mass were 0.68 (95% CI: 0.59-0.77), 0.56 (95% CI: 0.47-0.65), and 0.44 (95% CI: 0.13-0.75), respectively. There was a significant difference in the weighted means of the heritability of V˙O2max across these different adjustment methods (P < .05). Moreover, there was evidence of statistical heterogeneity in the heritability estimates among studies. Meta-regression analysis revealed that sex could partially explain the heterogeneity in the V˙O2max heritability estimates adjusted by body weight. For submaximal endurance phenotypes and endurance performance, the weighted mean heritabilities were 0.49 (95% CI: 0.33-0.65) and 0.53 (95% CI: 0.27-0.78), respectively. There was statistically significant heterogeneity in the heritability estimates reported among the studies, and we could not identify the specific factors explaining the heterogeneity. Although existing studies indicate that genetic factors account for 44%-68% of the variability in endurance-related phenotypes, further studies are necessary to clarify these values.
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Affiliation(s)
- E Miyamoto-Mikami
- Department of Sports and Life Science, National Institute of Fitness and Sports in Kanoya, Kanoya-city, Kagoshima, Japan
| | - H Zempo
- Japan Society for the Promotion of Science, Chiyoda-ku, Tokyo, Japan.,Graduate School of Health and Sports Science, Juntendo University, Inzai-city, Chiba, Japan
| | - N Fuku
- Graduate School of Health and Sports Science, Juntendo University, Inzai-city, Chiba, Japan
| | - N Kikuchi
- Department of Physical Education, Nippon Sport Science University, Setagaya-ku, Tokyo, Japan
| | - M Miyachi
- Department of Physical Activity Research, National Institute of Health and Nutrition, NIBIOHN, Shinjuku, Tokyo, Japan
| | - H Murakami
- Department of Physical Activity Research, National Institute of Health and Nutrition, NIBIOHN, Shinjuku, Tokyo, Japan
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Nii D, Miyachi M, Shimada Y, Nozawa Y, Ito M, Homma Y, Ikehira S, Yamanoi Y, Nishihara H, Tomo T. Conjugates between photosystem I and a carbon nanotube for a photoresponse device. Photosynth Res 2017; 133:155-162. [PMID: 27864658 DOI: 10.1007/s11120-016-0324-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Accepted: 11/10/2016] [Indexed: 06/06/2023]
Abstract
Photosystem I (PS I) is a large pigment-protein complex embedded in the thylakoid membranes that performs light-driven electron transfer across the thylakoid membrane. Carbon nanotubes exhibit excellent electrical conductivities and excellent strength and stiffness. In this study, we generated PSI-carbon nanotube conjugates dispersed in a solution aimed at application in artificial photosynthesis. PS I complexes in which a carbon nanotube binding peptide was introduced into the middle of the PsaE subunit were conjugated on a single-walled carbon nanotube, orienting the electron acceptor side to the nanotube. Spectral and photoluminescence analysis showed that the PS I is bound to a single-walled carbon nanotube, which was confirmed by transmission electron microscopy. Photocurrent observation proved that the photoexcited electron originated from PSI and transferred to the carbon nanotube with light irradiation, which also confirmed its orientated conjugation. The PS I-carbon nanotube conjugate will be a useful nano-optoelectronic device for the development of artificial systems.
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Affiliation(s)
- Daisuke Nii
- Department of Physics, Graduate School of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Mariko Miyachi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Yuichiro Shimada
- Department of Industrial Chemistry, Faculty of Engineering, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Yosuke Nozawa
- Department of Physics, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Masahiro Ito
- Department of Physics, Graduate School of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Yoshikazu Homma
- Department of Physics, Graduate School of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
| | - Shu Ikehira
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Yoshinori Yamanoi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Hiroshi Nishihara
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Tatsuya Tomo
- Department of Physics, Graduate School of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan.
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Ihara H, Miyachi M. 182 Antibody profiles of patients with acute herpes zoster. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.02.197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Miyachi M, Ikehira S, Nishiori D, Yamanoi Y, Yamada M, Iwai M, Tomo T, Allakhverdiev SI, Nishihara H. Photocurrent Generation of Reconstituted Photosystem II on a Self-Assembled Gold Film. Langmuir 2017; 33:1351-1358. [PMID: 28103045 DOI: 10.1021/acs.langmuir.6b03499] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Photosystem II (PSII)-modified gold electrodes were prepared by the deposition of PSII reconstituted with platinum nanoparticles (PtNPs) on Au electrodes. PtNPs modified with 1-[15-(3,5,6-trimethyl-1,4-benzoquinone-2-yl)]pentadecyl disulfide ((TMQ(CH2)15S)2) were incorporated into the QB site of PSII isolated from thermophilic cyanobacterium Thermosynechococcus elongatus. The reconstitution was confirmed by QA-reoxidation measurements. PSII reconstituted with PtNPs was deposited and integrated on a Au(111) surface modified with 4,4'-biphenyldithiol. The cross section of the reconstituted PSII film on the Au electrode was investigated by SEM. Absorption spectra showed that the surface coverage of the electrode was about 18 pmol PSII cm-2. A photocurrent density of 15 nAcm-2 at E = +0.10 V (vs Ag/AgCl) was observed under 680 nm irradiation. The photoresponse showed good reversibility under alternating light and dark conditions. Clear photoresponses were not observed in the absence of PSII and molecular wire. These results supported the photocurrent originated from PSII and moved to a gold electrode by light irradiation, which also confirmed conjugation with orientation through the molecular wire.
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Affiliation(s)
- Mariko Miyachi
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shu Ikehira
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Daiki Nishiori
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yoshinori Yamanoi
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masato Yamada
- Department of Biology, Faculty of Science, Tokyo University of Science , Kagurazaka 1-3, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Masako Iwai
- Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology , Yokohama 226-8503, Japan
| | - Tatsuya Tomo
- Department of Biology, Faculty of Science, Tokyo University of Science , Kagurazaka 1-3, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Suleyman I Allakhverdiev
- Controlled Photobiosynthesis Laboratory, Institute of Plant Physiology, Russian Academy of Sciences , Botanicheskaya Street 35, Moscow 127276, Russia
- Institute of Basic Biological Problems, Russian Academy of Sciences , Pushchino, Moscow Region 142290, Russia
- Faculty of Biology, M. V. Lomonosov Moscow State University , Leninskie Gory 1-12, Moscow 119991, Russia
| | - Hiroshi Nishihara
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Zempo H, Miyamoto-Mikami E, Kikuchi N, Fuku N, Miyachi M, Murakami H. Heritability estimates of muscle strength-related phenotypes: A systematic review and meta-analysis. Scand J Med Sci Sports 2016; 27:1537-1546. [PMID: 27882617 DOI: 10.1111/sms.12804] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/24/2016] [Indexed: 02/02/2023]
Abstract
The purpose of this study was to clarify the heritability estimates of human muscle strength-related phenotypes (H2 -msp). A systematic literature search was conducted using PubMed (through August 22, 2016). Studies reporting the H2 -msp for healthy subjects in a sedentary state were included. Random-effects models were used to calculate the weighted mean heritability estimates. Moreover, subgroup analyses were performed based on phenotypic categories (eg, grip strength, isotonic strength, jumping ability). Sensitivity analyses were also conducted to investigate potential sources of heterogeneity of H2 -msp, which included age and sex. Twenty-four articles including 58 measurements were included in the meta-analysis. The weighted mean H2 -msp for all 58 measurements was 0.52 (95% confidence intervals [CI]: 0.48-0.56), with high heterogeneity (I2 =91.0%, P<.001). Subgroup analysis showed that the heritability of isometric grip strength, other isometric strength, isotonic strength, isokinetic strength, jumping ability, and other power measurements was 0.56 (95% CI: 0.46-0.67), 0.49 (0.47-0.52), 0.49 (0.32-0.67), 0.49 (0.37-0.61), 0.55 (0.45-0.65), and 0.51 (0.31-0.70), respectively. The H2 -msp decreased with age (P<.05). In conclusion, our results indicate that the influence of genetic and environmental factors on muscle strength-related phenotypes is comparable. Moreover, the role of environmental factors increased with age. These findings may contribute toward an understanding of muscle strength-related phenotypes.
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Affiliation(s)
- H Zempo
- Japan Society for the Promotion of Science, Tokyo, Japan.,Graduate School of Health and Sports Science, Juntendo University, Chiba, Japan
| | - E Miyamoto-Mikami
- Japan Society for the Promotion of Science, Tokyo, Japan.,Department of Sports and Life Science, National Institute of Fitness and Sports in Kanoya, Kagoshima, Japan
| | - N Kikuchi
- Department of Physical Education, Nippon Sport Science University, Tokyo, Japan
| | - N Fuku
- Graduate School of Health and Sports Science, Juntendo University, Chiba, Japan
| | - M Miyachi
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition, NIBIOHN, Tokyo, Japan
| | - H Murakami
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition, NIBIOHN, Tokyo, Japan
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Kikuchi N, Fuku N, Matsumoto R, Matsumoto S, Murakami H, Miyachi M, Nakazato K. The Association Between MCT1 T1470A Polymorphism and Power-Oriented Athletic Performance. Int J Sports Med 2016; 38:76-80. [PMID: 27813046 DOI: 10.1055/s-0042-117113] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The purpose of this study was to investigate the effects of the MCT1 T1470A polymorphism (rs1049434) on power-oriented performance and lactate concentration during or after cycling sprints in Japanese wrestlers. Participants (199 wrestlers and 649 controls) were genotyped for the MCT1 T1470A genotype (rs1049434) using the TaqMan® Assay. All wrestlers were international (n=77) or national (n=122) level athletes. Among them, 46 wrestlers performed 2 anaerobic performance tests, a 30-s Wingate Anaerobic test (WAnT) and a series of 10 maximal effort 10-s sprints on a cycle ergometer. Blood lactate levels were measured before, during, and after the tests. In the A-allele recessive model (AA vs. TA+TT), the frequency of the AA genotype was significantly higher in all wrestlers than in controls (p=0.037). Wrestlers with AA genotype had lower blood lactate concentrations than those with TA+TT genotype at 10 min after the WAnT and following the 5th and the final set of repeated cycling sprints (p<0.05). The AA genotype of the MCT1 T1470A polymorphism is over-represented in wrestlers compared with controls and is associated with lower blood lactate concentrations after 30-s WAnT and during intermittent sprint tests in Japanese wrestlers.
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Affiliation(s)
- N Kikuchi
- Faculty of Sport Science, Nippon Sport Science University, Tokyo, Japan
| | - N Fuku
- Graduate School of Health and Sports Science, Juntendo University, Chiba, Japan
| | - R Matsumoto
- Graduate School of Medicine, Gunma University, Maebashi-city, Japan
| | - S Matsumoto
- Faculty of Sport Science, Nippon Sport Science University, Tokyo, Japan
| | - H Murakami
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition, NIBIOHN, Tokyo, Japan
| | - M Miyachi
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition, NIBIOHN, Tokyo, Japan
| | - K Nakazato
- Faculty of Medical Science, Nippon Sport Science University, Tokyo, Japan
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13
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Yamanoi Y, Kobayashi T, Maeda H, Miyachi M, Ara M, Tada H, Nishihara H. Effective Method for Micro-Patterning Arene-Terminated Monolayers on a Si(111) Electrode. Langmuir 2016; 32:6825-6829. [PMID: 27328628 DOI: 10.1021/acs.langmuir.6b01370] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Microstructured electrodes are significant to modern electrochemistry. A representative aromatic group, 4-ferrocenylphenyl one, was covalently bound to a micropatterned silicon electrode via the arylation of a hydrogen-terminated silicon(111) surface formed selectively on a Si wafer. Starting from a silicon(100)-on-insulator (SOI) wafer, the aromatic monolayer was attached sequentially by spin-coating a resist, electron beam lithography, Cr/Au deposition, lift-off, anisotropic etching with aqueous KOH solution, and Pd-catalyzed arylation. Cyclic voltammetry (CV) and X-ray photoelectron spectroscopy (XPS) are used to characterize the coupling reaction between 4-ferrocenyl group and silicon substrate, and to confirm performance of the final modified microsized electrode. These data show that this synthetic protocol gives chemically well-defined and robust functionalized monolayers on a silicon semiconducting surface with a small electrode.
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Affiliation(s)
- Yoshinori Yamanoi
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tetsuhiro Kobayashi
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hiroaki Maeda
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Mariko Miyachi
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masato Ara
- Graduate School of Engineering Science, Osaka University , 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan
| | - Hirokazu Tada
- Graduate School of Engineering Science, Osaka University , 1-3 Machikaneyama, Toyonaka, Osaka, 560-8531, Japan
| | - Hiroshi Nishihara
- Department of Chemistry, School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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14
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Ryu SY, Ahn JK, Nakano T, Ahn DS, Ajimura S, Akimune H, Asano Y, Chang WC, Chen JY, Daté S, Ejiri H, Fujimura H, Fujiwara M, Fukui S, Hasegawa S, Hicks K, Horie K, Hotta T, Hwang SH, Imai K, Ishikawa T, Iwata T, Kato Y, Kawai H, Kino K, Kohri H, Kon Y, Kumagai N, Lin PJ, Maeda Y, Makino S, Matsuda T, Matsuoka N, Mibe T, Miyabe M, Miyachi M, Morino Y, Muramatsu N, Murayama R, Nakatsugawa Y, Nam SI, Niiyama M, Nomachi M, Ohashi Y, Ohkuma H, Ohta T, Ooba T, Oshuev DS, Parker JD, Rangacharyulu C, Sakaguchi A, Sawada T, Shagin PM, Shiino Y, Shimizu H, Strokovsky EA, Sugaya Y, Sumihama M, Tokiyasu AO, Toi Y, Toyokawa H, Tsunemi T, Uchida M, Ungaro M, Wakai A, Wang CW, Wang SC, Yonehara K, Yorita T, Yoshimura M, Yosoi M, Zegers RGT. Interference Effect between ϕ and Λ(1520) Production Channels in the γp→K^{+}K^{-}p Reaction near Threshold. Phys Rev Lett 2016; 116:232001. [PMID: 27341225 DOI: 10.1103/physrevlett.116.232001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Indexed: 06/06/2023]
Abstract
The ϕ-Λ(1520) interference effect in the γp→K^{+}K^{-}p reaction has been measured for the first time in the energy range from 1.673 to 2.173 GeV. The relative phases between ϕ and Λ(1520) production amplitudes were obtained in the kinematic region where the two resonances overlap. The measurement results support strong constructive interference when K^{+}K^{-} pairs are observed at forward angles but destructive interference for proton emission at forward angles. Furthermore, the observed interference effect does not account for the sqrt[s]=2.1 GeV bump structure in forward differential cross sections for ϕ photoproduction. This fact suggests possible exotic structures such as a hidden-strangeness pentaquark state, a new Pomeron exchange, or rescattering processes via other hyperon states.
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Affiliation(s)
- S Y Ryu
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - J K Ahn
- Department of Physics, Korea University, Seoul 02841, Republic of Korea
| | - T Nakano
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - D S Ahn
- RIKEN, The Institute of Physical and Chemical Research, Wako, Saitama 351-0198, Japan
| | - S Ajimura
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - H Akimune
- Department of Physics, Konan University, Kobe, Hyogo 658-8501, Japan
| | - Y Asano
- XFEL Project Head Office, RIKEN, Sayo, Hyogo 679-5143, Japan
| | - W C Chang
- Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
| | - J Y Chen
- Light Source Division, National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan
| | - S Daté
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5143, Japan
| | - H Ejiri
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - H Fujimura
- Wakayama Medical College, Wakayama 641-8509, Japan
| | - M Fujiwara
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - S Fukui
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - S Hasegawa
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - K Hicks
- Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
| | - K Horie
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Hotta
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - S H Hwang
- Korea Research Institute of Standards and Science (KRISS), Daejeon 34113, Republic of Korea
| | - K Imai
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - T Ishikawa
- Research Center for Electron Photon Science, Tohoku University, Sendai, Miyagi 982-0826, Japan
| | - T Iwata
- Department of Physics, Yamagata University, Yamagata 990-8560, Japan
| | - Y Kato
- Kobayashi-Maskawa Institute, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - H Kawai
- Department of Physics, Chiba University, Chiba 263-8522, Japan
| | - K Kino
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - H Kohri
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Y Kon
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - N Kumagai
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5143, Japan
| | - P J Lin
- Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
| | - Y Maeda
- Proton Therapy Center, Fukui Prefectural Hospital, Fukui 910-8526, Japan
| | - S Makino
- Wakayama Medical College, Wakayama 641-8509, Japan
| | - T Matsuda
- Department of Applied Physics, Miyazaki University, Miyazaki 889-2192, Japan
| | - N Matsuoka
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - T Mibe
- High Energy Accelerator Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - M Miyabe
- Research Center for Electron Photon Science, Tohoku University, Sendai, Miyagi 982-0826, Japan
| | - M Miyachi
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
| | - Y Morino
- High Energy Accelerator Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - N Muramatsu
- Research Center for Electron Photon Science, Tohoku University, Sendai, Miyagi 982-0826, Japan
| | - R Murayama
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Y Nakatsugawa
- High Energy Accelerator Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - S I Nam
- Department of Physics, Pukyong National University, Busan 48513, Republic of Korea
| | - M Niiyama
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - M Nomachi
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Y Ohashi
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5143, Japan
| | - H Ohkuma
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5143, Japan
| | - T Ohta
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - T Ooba
- Department of Physics, Chiba University, Chiba 263-8522, Japan
| | - D S Oshuev
- Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
| | - J D Parker
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - C Rangacharyulu
- Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada
| | - A Sakaguchi
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Sawada
- Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
| | - P M Shagin
- School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA
| | - Y Shiino
- Department of Physics, Chiba University, Chiba 263-8522, Japan
| | - H Shimizu
- Research Center for Electron Photon Science, Tohoku University, Sendai, Miyagi 982-0826, Japan
| | - E A Strokovsky
- Joint Institute for Nuclear Research, Dubna, Moscow Region, 142281, Russia
| | - Y Sugaya
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - M Sumihama
- Department of Education, Gifu University, Gifu 501-1193, Japan
| | - A O Tokiyasu
- Research Center for Electron Photon Science, Tohoku University, Sendai, Miyagi 982-0826, Japan
| | - Y Toi
- Department of Applied Physics, Miyazaki University, Miyazaki 889-2192, Japan
| | - H Toyokawa
- Japan Synchrotron Radiation Research Institute, Sayo, Hyogo 679-5143, Japan
| | - T Tsunemi
- Department of Physics, Kyoto University, Kyoto 606-8502, Japan
| | - M Uchida
- Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan
| | - M Ungaro
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269-3046, USA
| | - A Wakai
- Akita Research Institute of Brain and Blood Vessels, Akita 010-0874, Japan
| | - C W Wang
- Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
| | - S C Wang
- Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
| | - K Yonehara
- Department of Physics, Konan University, Kobe, Hyogo 658-8501, Japan
| | - T Yorita
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - M Yoshimura
- Institute for Protein Research, Osaka University, Suita, Osaka 565-0871, Japan
| | - M Yosoi
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - R G T Zegers
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
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Miyamoto-Mikami E, Fujita Y, Murakami H, Ito M, Miyachi M, Kawahara T, Fuku N. CNTFR Genotype and Sprint/power Performance: Case-control Association and Functional Studies. Int J Sports Med 2016; 37:411-7. [PMID: 26837930 DOI: 10.1055/s-0035-1564257] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The aim of this study was to investigate whether rs41274853 in the 3'-untranslated region of the ciliary neurotrophic factor receptor gene (CNTFR) is associated with elite sprint/power athletic status and assess its functional significance. A total of 211 Japanese sprint/power track and field athletes (62 international, 72 national, and 77 regional athletes) and 814 Japanese controls were genotyped at rs41274853. Luciferase reporter assay was conducted to investigate whether this C-to-T polymorphism affects binding of microRNA miR-675-5p to this region. The TT genotype was significantly more frequent among international sprint/power athletes (19.4%) than in the controls after Bonferroni correction (7.9%, P=0.036, OR=2.81 [95% CI: 1.43-5.55]). Furthermore, in non-athletic young/middle-aged men (n=132), TT genotype carriers exhibited significantly greater leg extension power (26.6±5.4 vs. 24.0±5.4 W/kg BW, P=0.019) and vertical jump performance (50.1±6.9 vs. 47.9±7.5 cm, P=0.047) than the CC+CT genotype carriers. Reporter assays revealed that the miR-675-5p binds to this polymorphic region within the CNTFR mRNA, irrespective of the rs41274853 allele present. Although the functional significance of the rs41274853 polymorphism remains unclear, the CNTFR is one of the candidate genes contributing to sprint/power performance.
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Affiliation(s)
- E Miyamoto-Mikami
- Department of Sports and Life Science, National Institute of Fitness and Sports in Kanoya, Kanoya, Kagoshima Japan
| | - Y Fujita
- Research Team for Mechanism of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - H Murakami
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition, Tokyo, Japan
| | - M Ito
- Research Team for Mechanism of Aging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - M Miyachi
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition, Tokyo, Japan
| | - T Kawahara
- General Director Research Departments, Japan Institute of Sports Sciences, Tokyo, Japan
| | - N Fuku
- Graduate School of Health and Sports Science, Juntendo University, Chiba, Japan
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Mustafar S, Wu KH, Toyoda R, Takada K, Maeda H, Miyachi M, Sakamoto R, Nishihara H. Electrochemical fabrication of one-dimensional porphyrinic wires on electrodes. Inorg Chem Front 2016. [DOI: 10.1039/c5qi00239g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
[5,15-Di(4-aminophenyl)-10,20-diphenylporphyrinato]zinc(ii) was found to electropolymerize on electrodes such as glassy carbon (GC), indium tin oxide (ITO), and tin oxide, to form a redox-active, stable, and reproducible π-conjugated polymer.
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Affiliation(s)
- Suzaliza Mustafar
- Department of Chemistry
- Graduate School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
| | - Kuo-Hui Wu
- Department of Chemistry
- Graduate School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
| | - Ryojun Toyoda
- Department of Chemistry
- Graduate School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
| | - Kenji Takada
- Department of Chemistry
- Graduate School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
| | - Hiroaki Maeda
- Department of Chemistry
- Graduate School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
| | - Mariko Miyachi
- Department of Chemistry
- Graduate School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
| | - Ryota Sakamoto
- Department of Chemistry
- Graduate School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
| | - Hiroshi Nishihara
- Department of Chemistry
- Graduate School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
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17
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Morita A, Aiba N, Miyachi M, Noda M, Deura K, Watanabe S. A Retrospective Prospective Cohort in Japanese -SAKU Cohort Study. Int J Epidemiol 2015. [DOI: 10.1093/ije/dyv096.523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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Sogabe N, Sawada SS, Lee IM, Kawakami R, Ishikawa-Takata K, Nakata Y, Mitomi M, Noguchi J, Tsukamoto K, Miyachi M, Blair SN. Weight change after 20 years of age and the incidence of dyslipidemia: a cohort study of Japanese male workers. J Public Health (Oxf) 2015. [PMID: 26199305 DOI: 10.1093/pubmed/fdv089] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND While heavier weight is known to increase the incidence of dyslipidemia, limited data are available on the relationship between weight gain and its development. METHODS A total of 2647 males were categorized into the following four groups according to the difference between their self-reported weight at 20 years of age and their measured weight in 1994-95: a loss of ≥5% (decrease), loss of <5% or gain of <5% (no change), gain of ≥5 to <15% (increase) and gain of ≥15% (sizable increase). They were followed up until their 2002-03 health examination. Using the 'no change' group as reference, the multivariable-adjusted odds ratio (adjusted for age, body mass index at 20 years of age, physical activity, smoking and alcohol intake) and 95% confidence interval (95% CI) for the incidence of dyslipidemia were determined using logistic regression models. RESULTS A total of 1342 participants developed dyslipidemia during the follow-up period. The 'increase' and 'sizable increase' groups had odds ratios for the incidence of dyslipidemia of 1.97 (95% CI, 1.59-2.45) and 2.68 (2.15-3.34), respectively, demonstrating that there was a significant dose-response association between weight gain since 20 years of age and the incidence of dyslipidemia (P < 0.001 for trend). CONCLUSION These results suggest that dyslipidemia could be prevented by avoiding weight gain in adulthood.
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Affiliation(s)
- N Sogabe
- Department of Health and Nutrition Sciences, Faculty of Human Health, Komazawa Women's University, Tokyo, Japan
| | - S S Sawada
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition, Tokyo, Japan
| | - I-M Lee
- Division of Preventive Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA Department of Epidemiology, Harvard School of Public Health, Boston, MA, USA
| | - R Kawakami
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition, Tokyo, Japan Graduate School of Sport Sciences, Waseda University, Saitama, Japan
| | - K Ishikawa-Takata
- Department of Nutritional Education, National Institute of Health and Nutrition, Tokyo, Japan
| | - Y Nakata
- Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - M Mitomi
- Department of Safety and Health, Tokyo Gas Co. Ltd., Tokyo, Japan
| | - J Noguchi
- Department of Safety and Health, Tokyo Gas Co. Ltd., Tokyo, Japan
| | - K Tsukamoto
- Department of Safety and Health, Tokyo Gas Co. Ltd., Tokyo, Japan
| | - M Miyachi
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition, Tokyo, Japan
| | - S N Blair
- Department of Exercise Science, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA Department of Epidemiology and Biostatistics, Arnold School of Public Health, University of South Carolina, Columbia, SC, USA
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Miyachi M, Yamamoto Y, Yamanoi Y, Nishihara H. Preparation of Pd Nanoparticles with Tetrahedral, Spherical, Plate, and Feather Shapes by Capping with 1-Pentyl Isocyanide. J Inorg Organomet Polym Mater 2014. [DOI: 10.1007/s10904-014-0121-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Miyachi M, Matsuno T, Miyazawa A, Asano K, Mataga I. Anti-inflammation response of astaxanthin on inhibiting nuclear factor kappa B activation. J Oral Maxillofac Surg 2014. [DOI: 10.1016/j.joms.2014.06.339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Kakazu N, Yamane H, Miyachi M, Shiwaku K, Hosoi H. Identification of the 12q15 amplicon within the homogeneously staining regions in the embryonal rhabdomyosarcoma cell line RMS-YM. Cytogenet Genome Res 2014; 142:167-73. [PMID: 24480864 DOI: 10.1159/000357930] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/04/2013] [Indexed: 11/19/2022] Open
Abstract
Gene amplification represents one of the molecular mechanisms of oncogene overexpression in many types of tumors. Homogeneously staining regions (HSRs) are cytogenetic hallmarks of gene amplification. Rhabdomyosarcoma is the most common malignant soft-tissue tumor in children. RMS-YM is an embryonal rhabdomyosarcoma cell line that possesses 3 HSRs. This cytogenetic finding suggests the presence of gene amplifications associated with tumor development or progression in RMS-YM. Here, using fluorescence in situ hybridization, we detected high amplification of the MDM2 gene in the HSRs of RMS-YM. We also refined the region of the amplicon and identified that the FRS2 gene and others are amplified in RMS-YM. MDM2 and FRS2 play important roles as a regulator of p53 and a mediator of FGF signaling, respectively, and thus are potential molecular targets for therapy in many different tumors. RMS-YM may be useful for studies of the molecular pathways of tumorigenesis and tumor progression in rhabdomyosarcoma and for in vitro evaluation of newly developed therapeutic agents that target MDM2 or FRS2.
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Affiliation(s)
- N Kakazu
- Department of Environmental and Preventive Medicine, Shimane University School of Medicine, Izumo, Japan
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22
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Miyachi M, Yamanoi Y, Nakazato K, Nishihara H. Bio-inspired photoresponse of porphyrin-attached gold nanoparticles on a field-effect transistor. Biochim Biophys Acta 2013; 1837:1567-71. [PMID: 24291676 DOI: 10.1016/j.bbabio.2013.11.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Revised: 11/07/2013] [Accepted: 11/15/2013] [Indexed: 10/26/2022]
Abstract
A bio-inspired photoresponse was engineered in porphyrin-attached Au nanoparticles (AuNPs) on a field-effect transistor (FET). The system mimics photosynthetic electron transfer, using porphyrin derivatives as photosensitizers and AuNPs as photoelectron counting devices. Porphyrin-protected AuNPs were immobilized onto the gate of an FET via the formation of self-assembled monolayers. Photoinduced electron transfer from the porphyrin led to single electron transfer at the Au nanoparticles, which was monitored via a changing gate voltage on the FET in the presence of organic electrolyte. The further attachment of other functional molecules to this system should enable various other potential functionalities. This article is part of a special issue entitled: photosynthesis research for sustainability: keys to produce clean energy.
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Affiliation(s)
- Mariko Miyachi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yoshinori Yamanoi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
| | - Kazuo Nakazato
- Department of Electrical Engineering and Computer Science, School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Hiroshi Nishihara
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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23
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Yoshida H, Miyachi M, Sakamoto K, Ouchi K, Yagyu S, Kikuchi K, Kuwahara Y, Tsuchiya K, Imamura T, Iehara T, Kakazu N, Hojo H, Hosoi H. PAX3-NCOA2 fusion gene has a dual role in promoting the proliferation and inhibiting the myogenic differentiation of rhabdomyosarcoma cells. Oncogene 2013; 33:5601-8. [DOI: 10.1038/onc.2013.491] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 09/20/2013] [Indexed: 11/10/2022]
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24
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Yamamoto Y, Miyachi M, Yamanoi Y, Minoda A, Maekawa S, Oshima S, Kobori Y, Nishihara H. Synthesis and Hydrogen Storage Properties of Palladium Nanoparticle–Organic Frameworks. J Inorg Organomet Polym Mater 2013. [DOI: 10.1007/s10904-013-9925-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Mikami E, Fuku N, Murakami H, Tsuchie H, Takahashi H, Ohiwa N, Tanaka H, Pitsiladis YP, Higuchi M, Miyachi M, Kawahara T, Tanaka M. ACTN3 R577X genotype is associated with sprinting in elite Japanese athletes. Int J Sports Med 2013; 35:172-7. [PMID: 23868678 DOI: 10.1055/s-0033-1347171] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The ACTN3 R577X genotype has been found to associate with sprint/power phenotypes in all elite athlete cohorts investigated. This association has not been extensively studied in elite Asian athletes. The present study was undertaken to investigate the association between the ACTN3 R577X genotype and elite Japanese track and field athlete status. 299 elite Japanese track and field athletes (134 sprint/power athletes; 165 endurance/middle-power athletes) and 649 Japanese controls were genotyped for the ACTN3 R577X polymorphism. All athletes were of national or international level. Sprint/power athletes showed a higher frequency of RR + RX genotype than controls (111/134 [82.8%] vs. 478/649 [73.7%], P = 0.025 under the R-dominant model), while there was no significant difference between endurance/middle-power athletes and controls (126/165 [76.4%] vs. 478/649 [73.7%], P = 0.48 under the R-dominant model). Sprinters with the RR + RX genotype had significantly faster personal best times for the 100 m than those with XX genotype (10.42 ± 0.05 s vs. 10.64 ± 0.09 s, P = 0.042); no such association was found in the 400 m sprinters (47.02 ± 0.36 s vs. 47.56 ± 0.99 s, P = 0.62). ACTN3 R577X genotype is associated with sprint/power performance in elite Japanese track and field athletes, especially short sprint performance.
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Affiliation(s)
- E Mikami
- Graduate School of Sport Sciences, Waseda University, Tokorozawa-city, Japan
| | - N Fuku
- Department of Genomics for Longevity and Health, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - H Murakami
- Department of Health Promotion and Exercise Program, National Institute of Health and Nutrition, Tokyo, Japan
| | - H Tsuchie
- Faculty of Business Administration, Josai University, Saitama, Japan
| | - H Takahashi
- Department of Sports Science, Japan Institute of Sports Sciences, Tokyo, Japan
| | - N Ohiwa
- Department of Sports Science, Japan Institute of Sports Sciences, Tokyo, Japan
| | - H Tanaka
- Faculty of Sport and Health Science, Fukuoka University, Fukuoka, Japan
| | - Y P Pitsiladis
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, United Kingdom
| | - M Higuchi
- Faculty of Sport Sciences, Waseda University, Saitama, Japan
| | - M Miyachi
- Department of Health Promotion and Exercise Program, National Institute of Health and Nutrition, Tokyo, Japan
| | - T Kawahara
- Department of Sports Medicine, Japan Institute of Sports Sciences, Tokyo, Japan
| | - M Tanaka
- Department of Genomics for Longevity and Health, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
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Yamanoi Y, Yamamoto Y, Miyachi M, Shimada M, Minoda A, Oshima S, Kobori Y, Nishihara H. Nanoparticle assemblies via coordination with a tetrakis(terpyridine) linker bearing a rigid tetrahedral core. Langmuir 2013; 29:8768-8772. [PMID: 23805784 DOI: 10.1021/la401896d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Controlling particle-particle interactions is a major challenge in achieving the programmable assembly of nanoparticles, which shows great potential for device fabrication and detection systems. We present here a simple chemical method that allows the formation of Pd nanoparticle assemblies using a tetrakis(terpyridine) linker with a rigid tetrahedral core.
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Affiliation(s)
- Yoshinori Yamanoi
- Department of Chemistry, School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
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Miyachi M, Yamamoto Y, Yamanoi Y, Minoda A, Oshima S, Kobori Y, Nishihara H. Synthesis of diazenido-ligated vanadium nanoparticles. Langmuir 2013; 29:5099-5103. [PMID: 23581295 DOI: 10.1021/la400102q] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Metallic vanadium nanoparticles stabilized with 4-octylphenyldiazenido groups (particle size: 1.7 ± 0.2 nm) were synthesized via the reduction of VCl4 with superhydride (LiBHEt3) in the presence of 4-octylphenyldiazonium salt in an Ar-filled glovebox. The resulting particles were characterized using TEM, elemental analysis, and XPS measurements. The unusual reaction on the surface resulted in the passivation of V-N═N-Ar covalent bonds.
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Affiliation(s)
- Mariko Miyachi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Tokyo 113-0033, Japan
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Kambe T, Sakamoto R, Hoshiko K, Takada K, Miyachi M, Ryu JH, Sasaki S, Kim J, Nakazato K, Takata M, Nishihara H. π-Conjugated Nickel Bis(dithiolene) Complex Nanosheet. J Am Chem Soc 2013; 135:2462-5. [DOI: 10.1021/ja312380b] [Citation(s) in RCA: 615] [Impact Index Per Article: 55.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Tetsuya Kambe
- Department of Chemistry, Graduate
School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ryota Sakamoto
- Department of Chemistry, Graduate
School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ken Hoshiko
- Department of Chemistry, Graduate
School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kenji Takada
- Department of Chemistry, Graduate
School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Mariko Miyachi
- Department of Chemistry, Graduate
School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ji-Heun Ryu
- Department of Electrical Engineering
and Computer Science, School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Sono Sasaki
- Department of Biobased Materials
Science, Graduate School of Science and Technology, Kyoto Institute of Technology, Hashigami-cho, Matsugasaki,
Sakyou-ku, Kyoto 606-8585, Japan
- Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8, 1-1-1
Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Jungeun Kim
- Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8, 1-1-1
Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Kazuo Nakazato
- Department of Electrical Engineering
and Computer Science, School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Masaki Takata
- Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8, 1-1-1
Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
- SPring-8 Center, RIKEN, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148,
Japan
| | - Hiroshi Nishihara
- Department of Chemistry, Graduate
School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Inubushi H, Kondo H, Lesbani A, Miyachi M, Yamanoi Y, Nishihara H. Direct synthesis of alkylsilanes by platinum-catalyzed coupling of hydrosilanes and iodoalkanes. Chem Commun (Camb) 2013; 49:134-6. [DOI: 10.1039/c2cc35150a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Yamanoi Y, Sendo J, Kobayashi T, Maeda H, Yabusaki Y, Miyachi M, Sakamoto R, Nishihara H. A new method to generate arene-terminated Si(111) and Ge(111) surfaces via a palladium-catalyzed arylation reaction. J Am Chem Soc 2012. [PMID: 23181720 DOI: 10.1021/ja308606t] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Formation of silicon-aryl and germanium-aryl direct bonds on the semiconductor surface is a key issue to realize molecular electronic devices, but the conventional methods based on radical intermediates have problems to accompany the side reactions. We developed the first example of versatile and efficient methods to form clean organic monolayers with Si-aryl and Ge-aryl bonds on hydrogen-terminated silicon and germanium surfaces by applying our original catalytic arylation reactions of hydrosilanes and hydrogermanes using Pd catalyst and base in homogeneous systems. We could immobilize aromatic groups with redox-active and photoluminescent properties, and further applied in the field of rigid π-conjugated redox molecular wire composites, as confirmed by the successive coordination of terpyridine molecules with transition metal ions. The surfaces were characterized using cyclic voltammetry (CV), water contact angle measurements, X-ray photoelectron spectroscopy (XPS), fluorescence spectroscopy, and atomic force microscopy (AFM). Especially, the AFM analysis of 17 nm-long metal complex molecular wires confirmed their vertical connection to the plane surface.
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Affiliation(s)
- Yoshinori Yamanoi
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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Kano N, Yoshinari N, Shibata Y, Miyachi M, Kawashima T, Enomoto M, Okazawa A, Kojima N, Guo JD, Nagase S. Anionic Iron Complexes with a Bond between an Ate-Type Pentacoordinated Germanium and an Iron Atom. Organometallics 2012. [DOI: 10.1021/om300915y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Naokazu Kano
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033,
Japan
| | - Naohito Yoshinari
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033,
Japan
| | - Yusuke Shibata
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033,
Japan
| | - Mariko Miyachi
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033,
Japan
| | - Takayuki Kawashima
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033,
Japan
| | - Masaya Enomoto
- Department of Chemistry, Faculty of Science
Division
I, Tokyo University of Science, Kagurazaka,
Shinjuku-ku, Tokyo 162-8601, Japan
| | - Atsushi Okazawa
- Department of Basic Science, Graduate School of Arts
and Sciences, The University of Tokyo,
Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Norimichi Kojima
- Department of Basic Science, Graduate School of Arts
and Sciences, The University of Tokyo,
Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Jing-Dong Guo
- Fukui Institute
for Fundamental Chemistry, Kyoto University, Takano-Nishihiraki-cho, Sakyo-ku,
Kyoto 606-8103, Japan
| | - Shigeru Nagase
- Fukui Institute
for Fundamental Chemistry, Kyoto University, Takano-Nishihiraki-cho, Sakyo-ku,
Kyoto 606-8103, Japan
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Nishimori Y, Maeda H, Katagiri S, Sendo J, Miyachi M, Sakamoto R, Yamanoi Y, Nishihara H. Synthesis and Electron Transfer Properties of Metal Complex Oligomer Wires with an Inherent Potential Gradient on Gold Electrode. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/masy.201200016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Sanada K, Iemitsu M, Murakami H, Gando Y, Kawano H, Kawakami R, Tabata I, Miyachi M. Adverse effects of coexistence of sarcopenia and metabolic syndrome in Japanese women. Eur J Clin Nutr 2012; 66:1093-8. [PMID: 22569087 DOI: 10.1038/ejcn.2012.43] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND/OBJECTIVES Little information is available regarding the interactions of sarcopenia and metabolic syndrome (MetS) in the risks of these age-associated diseases in women. The present cross-sectional study was performed to investigate whether the coexistence of sarcopenia and MetS further increases the risks of lifestyle-related diseases in Japanese women. SUBJECTS/METHODS Healthy Japanese women (n=533) aged 30-84 participated in this study. MetS was defined as higher body mass index, fasting plasma glucose, systolic or diastolic blood pressure and blood lipid abnormalities. Appendicular muscle mass and bone mineral density (BMD) were measured using dual-energy X-ray absorptiometry. The criterion of low muscle mass and strength defined median skeletal muscle index (appendicular muscle mass/height², kg/m²) and handgrip strength. RESULTS Two-way ANCOVA with adjustment for age, body fat percentage and whole-body lean tissue mass indicated that sarcopenia and MetS interacted to produce a significant effect on HbA1c, systolic blood pressure, triglycerides and brachial-ankle pulse wave velocity in Japanese women. The systolic blood pressure, triglycerides and brachial-ankle pulse wave velocity were significantly higher in women with coexisting sarcopenia and MetS than in healthy controls or in those with sarcopenia or MetS alone. The HbA1c in the coexisting sarcopenia and MetS group was higher than in healthy controls and sarcopenia subjects. CONCLUSIONS The coexistence of sarcopenia and MetS further increases the risks of cardiovascular diseases, such as type 2 diabetes mellitus, hypertension, arterial stiffness and hyperlipidemia even adjustment of age and body composition in adult Japanese women.
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Affiliation(s)
- K Sanada
- Faculty of Sport and Health Science, Ritsumeikan University, Shiga, Japan.
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34
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Fuku N, Murakami H, Iemitsu M, Sanada K, Tanaka M, Miyachi M. Mitochondrial Macrohaplogroup Associated with Muscle Power in Healthy Adults. Int J Sports Med 2012; 33:410-4. [DOI: 10.1055/s-0031-1301317] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- N. Fuku
- Department of Genomics for Longevity and Health, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - H. Murakami
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition, Tokyo, Japan
| | - M. Iemitsu
- Faculty of Sport and Health Science, Ritsumeikan University, Shiga, Japan
| | - K. Sanada
- Faculty of Sport and Health Science, Ritsumeikan University, Shiga, Japan
| | - M. Tanaka
- Department of Genomics for Longevity and Health, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - M. Miyachi
- Department of Health Promotion and Exercise, National Institute of Health and Nutrition, Tokyo, Japan
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35
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Miyachi M, Yamanoi Y, Shibata Y, Matsumoto H, Nakazato K, Konno M, Ito K, Inoue Y, Nishihara H. A photosensing system composed of photosystem I, molecular wire, gold nanoparticle, and double surfactants in water. Chem Commun (Camb) 2010; 46:2557-9. [DOI: 10.1039/b926841c] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Gando Y, Kawano H, Yamamoto K, Sanada K, Tanimoto M, Oh T, Ohmori Y, Miyatani M, Usui C, Takahashi E, Tabata I, Higuchi M, Miyachi M. Age and cardiorespiratory fitness are associated with arterial stiffening and left ventricular remodelling. J Hum Hypertens 2009; 24:197-206. [DOI: 10.1038/jhh.2009.57] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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37
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Muramatsu N, Chen JY, Chang WC, Ahn DS, Ahn JK, Akimune H, Asano Y, Daté S, Ejiri H, Fujimura H, Fujiwara M, Fukui S, Hasegawa S, Hicks K, Horie K, Hotta T, Imai K, Ishikawa T, Iwata T, Kato Y, Kawai H, Kino K, Kohri H, Kumagai N, Makino S, Matsuda T, Matsumura T, Matsuoka N, Mibe T, Miyabe M, Miyachi M, Nakano T, Niiyama M, Nomachi M, Ohashi Y, Ohkuma H, Ooba T, Oshuev DS, Rangacharyulu C, Sakaguchi A, Shagin PM, Shiino Y, Shimizu H, Sugaya Y, Sumihama M, Toi Y, Toyokawa H, Wakai A, Wang CW, Wang SC, Yonehara K, Yorita T, Yoshimura M, Yosoi M, Zegers RGT. Near-threshold photoproduction of Lambda(1520) from protons and deuterons. Phys Rev Lett 2009; 103:012001. [PMID: 19659135 DOI: 10.1103/physrevlett.103.012001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2009] [Indexed: 05/28/2023]
Abstract
Photoproduction of Lambda(1520) with liquid hydrogen and deuterium targets was examined at photon energies below 2.4 GeV in the SPring-8 LEPS experiment. For the first time, the differential cross sections were measured at low energies and with a deuterium target. A large asymmetry of the production cross sections from protons and neutrons was observed at backward K+/0 angles. This suggests the importance of the contact term, which coexists with t-channel K exchange under gauge invariance. This interpretation was compatible with the differential cross sections, decay asymmetry, and photon beam asymmetry measured in the production from protons at forward K+ angles.
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Affiliation(s)
- N Muramatsu
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
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Miyachi M, Yamanoi Y, Yonezawa T, Nishihara H, Iwai M, Konno M, Iwai M, Inoue Y. Surface immobilization of PSI using vitamin K1-like molecular wires for fabrication of a bio-photoelectrode. J Nanosci Nanotechnol 2009; 9:1722-1726. [PMID: 19435031 DOI: 10.1166/jnn.2009.si06] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We present a bio-photoelectrode made of photosystem I complex (PSI) of cyanobacteria, Thermosynechococcus elongatus, and molecular wires. The newly designed and synthesized molecular wire similar to vitamin K1 (VK1) has a naphthoquinone moiety that can connect to PSI, and a terpyridine moiety for connection to a Co(II) ion. Surface immobilization of PSI and molecular wires was performed by a self-assembled monolayer (SAM) formation process at indium tin oxide (ITO) followed by stepwise coordination reactions. The PSI-immobilized ITO showed a photocurrent action spectrum, whose profile was consistent with that of PSI. We have demonstrated a new method for the immobilization of PSI on the electrode surface, useful in the construction of phovoltaic cells or photon-sensing devices.
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Affiliation(s)
- Mariko Miyachi
- Department of Chemistry School of Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Miyachi M, Ohta M, Nakai M, Kubota Y, Yamanoi Y, Yonezawa T, Nishihara H. Surface Bottom-up Fabrication of Porphyrin-terminated Metal Complex Molecular Wires with Photo-electron Conversion Properties on ITO. CHEM LETT 2008. [DOI: 10.1246/cl.2008.404] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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40
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Usui C, Takahashi E, Gando Y, Sanada K, Oka J, Miyachi M, Tabata I, Higuchi M. Resting energy expenditure can be assessed by dual-energy X-ray absorptiometry in women regardless of age and fitness. Eur J Clin Nutr 2008; 63:529-35. [DOI: 10.1038/sj.ejcn.1602980] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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41
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Sanada K, Miyachi M, Tabata I, Miyatani M, Tanimoto M, Oh TW, Yamamoto K, Usui C, Takahashi E, Kawano H, Gando Y, Higuchi M. Muscle mass and bone mineral indices: does the normalized bone mineral content differ with age? Eur J Clin Nutr 2008; 63:465-72. [DOI: 10.1038/sj.ejcn.1602977] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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42
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Ohkawara K, Tanaka S, Miyachi M, Ishikawa-Takata K, Tabata I. A dose–response relation between aerobic exercise and visceral fat reduction: systematic review of clinical trials. Int J Obes (Lond) 2007; 31:1786-97. [PMID: 17637702 DOI: 10.1038/sj.ijo.0803683] [Citation(s) in RCA: 154] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
OBJECTIVE It has been suggested that exercise has preferential effects on visceral fat reduction. However, the dose-response effect remains unclear because of limited evidence from individual studies. The purpose of this study was to systematically review the current literature to establish whether reduction of visceral fat by aerobic exercise has a dose-response relationship. METHODS A database search was performed (PubMed, 1966-2006) with appropriate keywords to identify studies exploring the effects of aerobic exercise as a weight loss intervention on visceral fat reduction. Visceral fat reduction was expressed as the percentage of visceral fat change per week (%DeltaVF/w). The energy expenditure by aerobic exercise was expressed as Sigma (metabolic equivalents x h per week (METs x h/w)). RESULTS Nine randomized control trials and seven non-randomized control trials were selected. In most of the studies, the subjects performed aerobic exercise generating 10 METs x h/w or more. Among all the selected groups (582 subjects), visceral fat decreased significantly (P<0.05) in 17 groups during the intervention, but not in the other 4 groups. There was no significant relationship between METs x h/w from aerobic exercise and %DeltaVF/w in all the selected groups. However, when subjects with metabolic-related disorders were not included (425 subjects), METs x h/w from aerobic exercise had a significant relationship with %DeltaVF/w (r=-0.75). Moreover, visceral fat reduction was significantly related to weight reduction during aerobic exercise intervention, although a significant visceral fat reduction may occur without significant weight loss. CONCLUSION These results suggest that at least 10 METs x h/w in aerobic exercise, such as brisk walking, light jogging or stationary ergometer usage, is required for visceral fat reduction, and that there is a dose-response relationship between aerobic exercise and visceral fat reduction in obese subjects without metabolic-related disorders.
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Affiliation(s)
- K Ohkawara
- Health Promotion and Exercise Program, National Institute of Health and Nutrition, Shinjuku-ku, Tokyo, Japan.
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Hayashi K, Miyachi M, Seno N, Takahashi K, Yamazaki K, Sugawara J, Yokoi T, Onodera S, Mesaki N. Fluctuations in carotid arterial distensibility during the menstrual cycle do not influence cardiovagal baroreflex sensitivity. Acta Physiol (Oxf) 2006; 186:103-10. [PMID: 16497187 DOI: 10.1111/j.1748-1716.2005.01505.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIM Fluctuations in autonomic nervous functions throughout the menstrual cycle and the underlying mechanism concerning them are not well known. This study was designed to test the hypothesis that fluctuations in cardiovagal baroreflex sensitivity (BRS) throughout the menstrual cycles of young women are due to fluctuations in carotid arterial distensibility. METHODS In eight eumenorrhoeic healthy young women (18-24 years), we determined the variations in the carotid arterial distensibility coefficient (DC; via simultaneous ultrasonography and applanation tonometry), cardiovagal BRS (phase IV of the Valsalva manoeuvre and the sequence method; up- or down-sequence spontaneous BRS), and serum oestradiol and progesterone concentrations at five points in the menstrual cycle (menstrual = M, follicular = F, ovulatory = O, early luteal = EL, and late luteal = LL). RESULTS Serum oestradiol and progesterone levels were consistent with the predicted cycle phases. Carotid arterial DC fluctuated cyclically, increasing significantly from the M (52.4 +/- 4.9 x 10(-3) kPa(-1), mean +/- SE) and F (52.7 +/- 4.4) phases to the O (57.6 +/- 4.4) phase and declining sharply in the EL (46.0 +/- 4.0) and LL (45.1 +/- 3.0) phases (F = 6.37, P < 0.05). Contrary to our prediction, however, cardiovagal BRS by the Valsalva manoeuvre (P = 0.73) or sequence method (up-sequence spontaneous BRS; P = 0.84: down-sequence spontaneous BRS; P = 0.67) did not change significantly during the menstrual cycle. CONCLUSION The results suggest that, although carotid arterial distensibility fluctuates with the changes in ovarian hormone levels that occur during the menstrual cycle, the fluctuations in carotid arterial distensibility do not influence cardiovagal BRS.
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Affiliation(s)
- K Hayashi
- Institute for Human Science and Biomedical Engineering, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan.
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Ueno LM, Miyachi M, Matsui T, Takahashi K, Yamazaki K, Hayashi K, Onodera S, Moritani T. Effect of aging on carotid artery stiffness and baroreflex sensitivity during head-out water immersion in man. Braz J Med Biol Res 2005; 38:629-37. [PMID: 15962190 DOI: 10.1590/s0100-879x2005000400018] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
To examine the possible age-related blood pressure (BP) deregulation in response to central hypervolemia, we measured spontaneous baroreflex sensitivity (SBRS), carotid arterial compliance (CC), and R-R interval coefficient of variation (RRICV) during basal and thermoneutral resting head-out-of-water immersion (HOWI) in 7 young (YG = 24.0 +/- 0.8 years) and 6 middle-aged/older (OL = 59.3 +/- 1.3 years) healthy men. Compared with basal conditions (YG = 19.6 +/- 4.0 vs OL = 6.1 +/- 1.5 ms/mmHg, P < 0.05), SBRS remained higher in YG than OL during rest HOWI (YG = 23.6 +/- 6.6 vs OL = 9.3 +/- 2.1 ms/mmHg, P < 0.05). The RRICV was significantly different between groups (YG = 6.5 +/- 1.4 vs OL = 2.8 +/- 0.4%, P < 0.05) under HOWI. The OL group had no increase in CC, but a significant increase in systolic BP (basal = 115.3 +/- 4.4 vs water = 129.3 +/- 5.3 mmHg, P < 0.05) under HOWI. In contrast, the YG group had a significant increase in CC (basal = 0.16 +/- 0.01 vs water = 0.17 +/- 0.02 mm(2)/mmHg, P < 0.05) with no changes in systolic BP. SBRS was positively related to CC (r = 0.58, P < 0.05 for basal vs r = 0.62, P < 0.05 for water). Our data suggest that age-related vagal dysfunction and reduced CC may be associated with SBRS differences between YG and OL groups, and with BP elevation during HOWI in healthy older men.
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Affiliation(s)
- L M Ueno
- Instituto do Coração, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil.
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Sugawara J, Tanabe T, Miyachi M, Yamamoto K, Takahashi K, Iemitsu M, Otsuki T, Homma S, Maeda S, Ajisaka R, Matsuda M. Non-invasive assessment of cardiac output during exercise in healthy young humans: comparison between Modelflow method and Doppler echocardiography method. ACTA ACUST UNITED AC 2004; 179:361-6. [PMID: 14656373 DOI: 10.1046/j.0001-6772.2003.01211.x] [Citation(s) in RCA: 166] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS The Modelflow method can estimate cardiac output from arterial blood pressure waveforms using a three-element model of aortic input impedance (aortic characteristic impedance, arterial compliance, and systemic vascular resistance). We tested the reliability of a non-invasive cardiac output estimation during submaximal exercise using the Modelflow method from finger arterial pressure waveforms collected by Portapres in healthy young humans. METHODS The Doppler echocardiography method was used as a reference method. Sixteen healthy young subjects (nine males and seven females) performed a multi-stage cycle ergometer exercise at an intensity corresponding to 70, 90, 110 and 130% of their individual ventilatory threshold for 2 min each. The simultaneous estimation of cardiac output (15 s averaged data) using the Modelflow and Doppler echocardiography methods was performed at rest and during exercise. RESULTS AND CONCLUSION The Modelflow-estimated cardiac output correlated significantly with the simultaneous estimates by the Doppler method in all subjects (r = 0.87, P < 0.0001) and the SE of estimation was 1.93 L min-1. Correlation coefficients in each subject ranged from 0.91 to 0.98. Although the Modelflow method overestimated cardiac output, the errors between two estimates were not significantly different among the exercise levels. These results suggest that the Modelflow method using Portapres could provide a reliable estimation of the relative change in cardiac output non-invasively and continuously during submaximal exercise in healthy young humans, at least in terms of the relative changes in cardiac output.
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Affiliation(s)
- J Sugawara
- Institute for Human Science and Biomedical Engineering, National Institute of Advanced Industrial Science and Technology (AIST), Namiki, Tsukuba, Ibaraki, Japan
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Ozawa H, Miyachi M, Ochiai I, Tsuchiya S, Morris JF, Kawata M. Annexin-1 (lipocortin-1)-immunoreactivity in the folliculo-stellate cells of rat anterior pituitary: the effect of adrenalectomy and corticosterone treatment on its subcellular distribution. J Neuroendocrinol 2002; 14:621-8. [PMID: 12153464 DOI: 10.1046/j.1365-2826.2002.00814.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In the pituitary gland, annexin-1 (lipocortin-1) located in folliculo-stellate (FS) cells has been advocated as one of the candidates for paracrine agents produced by FS cells that modulate the release of pituitary hormones. However, the expression and distribution pattern of annexin-1 in FS cells under different circulating corticosteroid conditions has not been examined. Thus, by means of pre-embedding immunoelectron microscopy, we investigated the expression of annexin-1 in FS cells under different corticosteroid conditions. Annexin-1-immunoreactivity was observed in the cytoplasm; especially intense immunoreactivity was detected in the follicle surface of FS cells under control conditions. After adrenalectomy, annexin-1-immunoreactivity almost disappeared, but the immunoreactivity recovered with corticosterone replacement. The expression of glucocorticoid receptor immunoreactivity in the nucleus of FS cells also showed a similar pattern to annexin-1 associated with the changes in the corticosteroid conditions. However, S-100 immunoreactivity, a marker for FS cells, was not changed whatever the corticosteroid conditions. These results confirm that glucocorticoids regulate the annexin-1 expression and demonstrate the translocation of annexin-1 from intracellular to pericellular sites in the FS cells of the rat anterior pituitary gland.
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Affiliation(s)
- H Ozawa
- Department of Anatomy and Neurobiology, Kyoto Prefectural University of Medicine, Kyoto, Japan.
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Ida E, Miyachi M, Uemura M, Osakama M, Tajitsu T. Current status of hospice cancer deaths both in-unit and at home (1995-2000), and prospects of home care services in Japan. Palliat Med 2002; 16:179-84. [PMID: 12046993 DOI: 10.1191/0269216302pm511oa] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In Japan, the first government-approved hospice (GAH) and palliative care unit was established and commenced operations in 1990, and hospice medical care was made eligible for health insurance coverage. By 31 December 2000, the number of GAH institutions had increased to 86 (1,590 beds). The ratio of hospices to population in Japan is currently approximately 1:1.5 million, with an average of one hospice bed for approximately every 80,000 people. This study of institutions reports a survey conducted to determine the number of deaths (hospice unit and home) of GAH cancer patients, and to determine the servicing status of hospice home care for the period 1995 through 2000. The place of death of the patients cared for by GAHs in 2000 were: hospice units 97.7% and home 2.3%. GAH patient deaths (both inpatient and at home) in 2000 was 2.6% of the total number of cancer patients' deaths, an increase of 3.8-fold since 1995. Of the total number of GAH institutions, 62% are engaged in home care services and 91 % offer hospice care by hospice-assigned doctors. In addition, 72% offer team care with nurses based at Home Care Agencies. In order for the hospice (including home care service) to become established in a way most appropriate to each region of Japan, GAH institutions must assume significant promotional roles in their respective regions. One of the goals and assignments of establishing medical service with hospice home care in Japan is to develop the systematic care programs of GAH institutions, which include home care service in addition to the already established hospice unit and outpatient services.
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Affiliation(s)
- E Ida
- Social Service Organization, Mikokoro Hospice, Sacred Heart of Jesus Hospital, Kumamoto City, Japan.
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Abstract
PURPOSE Endurance training induces reductions in both resting and postexercise heart rate (HR). If adaptation in cardiac autonomic regulation is a contributing factor in these reductions, changes in cardiac autonomic nervous system (ANS) should correspond to those in HR during an endurance-training program. We investigated the changes in resting and postexercise HR variabilities (both in the time and frequency domain) over a 6-wk training program. METHODS HR variability was measured five times in an endurance-training group (N = 7) and four times in a control group (N = 5) during the course of study. RESULTS Endurance training decreased HR and increased indices of parasympathetic modulation measured both at rest and during postexercise recovery periods. Noteworthy is that no changes in either HR or indices of ANS modulation measured during postexercise recovery periods were detectable after the first 7 d of the study despite continued changes in resting HR and indices in ANS modulation measured between the 7th and 42nd days of the endurance-training program. CONCLUSIONS The study demonstrates that with endurance-training changes in cardiac ANS modulation partly contribute to a decrease in HR at rest and during postexercise recovery period, and that adaptation of the cardiac autonomic control occurs sooner in immediate postexercise periods than at rest.
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Affiliation(s)
- K Yamamoto
- Department of Health and Sports Sciences, Kawasaki University of Medical Welfare, 288 Matsushima, Kurashiki, Okayama, Japan
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Miyachi M, Tanaka H, Yamamoto K, Yoshioka A, Takahashi K, Onodera S. Effects of one-legged endurance training on femoral arterial and venous size in healthy humans. J Appl Physiol (1985) 2001; 90:2439-44. [PMID: 11356811 DOI: 10.1152/jappl.2001.90.6.2439] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The cross-sectional area (CSA) of large-conductance arteries increases in response to endurance training in humans. To determine whether training-induced changes in arterial structure are systemic in nature or, rather, are confined to the arteries supplying exercising muscles, we studied 10 young men who performed one-legged cycle training [80% of one-legged peak O2 uptake (VO2 peak)), 40 min/day, 4 days/wk] for 6 wk and detraining for another 6 wk. There were no significant differences in baseline one-legged VO2 peak) and CSA of the common femoral artery and vein (via B-mode ultrasound) between experimental and control legs. In the experimental leg, one-legged VO2 peak) increased 16% [from 3.0 +/- 0.1 to 3.4 +/- 0.1 (SE) l/min], arterial CSA increased 16% (from 84 +/- 3 to 97 +/- 5 mm2), and venous CSA increased 46% (from 56 +/- 5 to 82 +/- 5 mm2) after endurance training. These changes returned to baseline during detraining. There were no changes in one-legged VO2 peak) and arterial CSA in the control leg, whereas femoral venous CSA in the control leg significantly increased 24% (from 54 +/- 5 to 67 +/- 4 mm2) during training. Changes in femoral arterial and venous CSA in the experimental leg were positively and significantly related to corresponding changes in one-legged VO2 peak) (r = 0.86 and 0.76, respectively), whereas there were no such relations in the control leg (r = 0.10 and 0.17). When stepwise regression analysis was performed, a primary determinant of change in VO2 peak) was change in femoral arterial CSA, explaining approximately 70% of the variability. These results support the hypothesis that the regional increase in blood flow, rather than systemic factors, is associated with the training-induced arterial expansion. Femoral arterial expansion may contribute, at least in part, to improvement in efficiency of blood transport from the heart to exercising muscles and may facilitate achievement of aerobic work capacity.
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Affiliation(s)
- M Miyachi
- Department of Health and Sports Sciences, Kawasaki University of Medical Welfare, Kurashiki, Okayama 701-0193, Japan.
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Onodera S, Miyachi M, Nishimura M, Yamamoto K, Yamaguchi H, Takahashi K, In JY, Amaoka H, Yoshioka A, Matsui T, Hara H. Effects of water depth on abdominal [correction of abdominails] aorta and inferior vena cava during standing in water. J Gravit Physiol 2001; 8:P59-60. [PMID: 12638625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
During water immersion bradycardia and increase in stroke volume induce by changing in hydrostatic pressure. We hypothesised that the cardiac alterations with immersion are associates with an increase in venous return from lower body. Because the venous return reflects volume of capacitance vein e.g, inferior vena cava. Therefore, we clarified the effects of water immersion on the size in left ventricle, aorta, and vena cava.
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