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Ikegami R, Shimizu I, Sato T, Jiao Y, Yoshida Y, Suda M, Hayashi Y, Kayamori H, Katsuumi G, Minamino T. P1588The pathological role of gamma-aminobutyric acid (GABA) signaling in promoting brown adipose tissue dysfunction in obesity. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p1588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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102
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Katsuumi G, Shimizu I, Yoshida Y, Suda M, Hayashi Y, Jiao S, Minamino T. P3997Catecholamine-induced cellular senescence in endothelium and bone marrow promotes cardiac inflammation and remodeling in mice. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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103
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Suda M, Shimizu I, Yoshida Y, Hayashi Y, Katsuumi G, Kayamori H, Ikegami R, Jiao S, Wakasugi T, Nagasawa A, Ujiie A, Ozawa T, Minamino T. P178A novel protein Senescence-associated glycoprotein (SAGP) is involved in the vessel homeostasis in murine hind limb ischemia model. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx501.p178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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104
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Hayashi Y, Shimizu I, Yoshida Y, Ikegami R, Katsuumi G, Suda M, Kayamori H, Minamino T. P2096The pathological role of coagulation factors in promoting brown adipose tissue dysfunction and systemic metabolic disorder in obesity. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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105
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Minoshima A, Kawabe K, Matsuki M, Saito Y, Kabara M, Hayasaka T, Yoshida Y, Aonuma T, Nishimura M, Takehara N, Hasebe N. P175Ninjurin1 is a novel factor for vascular maturation and mediates the blood flow recovery in the hind limb ischemia. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx501.p175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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106
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Nagasawa A, Shimizu I, Yoshida Y, Tsuchida M, Minamino T. P3474Endothelial p53 is involved in the vascular dysfunction of hyperglycemic and ischemic conditions. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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107
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Iwasa H, Masui Y, Gondo Y, Inagaki H, Yoshida Y. PERSONALITY AND ALL-CAUSE MORTALITY: COMBINED ANALYSIS BETWEEN NEUROTICISM AND EXTRAVERSION. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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108
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109
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Song D, Han G, Kyung W, Seo J, Cho S, Kim BS, Arita M, Shimada K, Namatame H, Taniguchi M, Yoshida Y, Eisaki H, Park SR, Kim C. Electron Number-Based Phase Diagram of Pr_{1-x}LaCe_{x}CuO_{4-δ} and Possible Absence of Disparity between Electron- and Hole-Doped Cuprate Phase Diagrams. PHYSICAL REVIEW LETTERS 2017; 118:137001. [PMID: 28409951 DOI: 10.1103/physrevlett.118.137001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Indexed: 06/07/2023]
Abstract
We performed annealing and angle resolved photoemission spectroscopy studies on electron-doped cuprate Pr_{1-x}LaCe_{x}CuO_{4-δ} (PLCCO). It is found that the optimal annealing condition is dependent on the Ce content x. The electron number (n) is estimated from the experimentally obtained Fermi surface volume for x=0.10, 0.15 and 0.18 samples. It clearly shows a significant and annealing dependent deviation from the nominal x. In addition, we observe that the pseudo-gap at hot spots is also closely correlated with n; the pseudogap gradually closes as n increases. We established a new phase diagram of PLCCO as a function of n. Different from the x-based one, the new phase diagram shows similar antiferromagnetic and superconducting phases to those of hole doped ones. Our results raise a possibility for absence of disparity between the phase diagrams of electron- and hole-doped cuprates.
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110
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Okamoto Y, Fujieda S, Okano M, Yoshida Y, Kakudo S, Masuyama K. House dust mite sublingual tablet is effective and safe in patients with allergic rhinitis. Allergy 2017; 72:435-443. [PMID: 27471838 PMCID: PMC5324568 DOI: 10.1111/all.12996] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/26/2016] [Indexed: 12/16/2022]
Abstract
BACKGROUND House dust mite (HDM) is the major indoor allergen for allergic diseases such as allergic rhinitis (AR) and asthma. Although sublingual immunotherapy is a curative treatment for HDM-induced AR, data from large-scale studies are limited. We evaluated the efficacy and safety of HDM tablets in adolescent and adult patients (aged 12-64 years) with HDM-induced AR with or without intermittent asthma. METHODS In a double-blind trial in Japan, 968 subjects were randomized 1 : 1 : 1 to 300 index of reactivity (IR), 500 IR, or placebo groups. The primary endpoint was the Average Adjusted Symptom Score (AASS) in the last eight weeks of the 52-week treatment. Secondary endpoints included individual nasal and ocular symptom scores, rescue medication use, and the Japanese Rhinoconjunctivitis Quality of Life Questionnaire (JRQLQ) scores. RESULTS The AASS in the last eight weeks of treatment significantly improved in both the 300 IR and the 500 IR groups compared to that in the placebo group (P < 0.001). In the 300 IR group, the onset of action occurred at week 8-10. All four nasal symptoms significantly improved in both active treatment groups; rescue medication use and JRQLQ outcome improved in the 300 IR group. Most adverse events (AEs) were mild, and 16 serious AEs (SAEs) were reported; however, none of them were drug-related. CONCLUSIONS One-year treatment with 300 IR and 500 IR HDM tablets was effective without major safety concerns. The recommended therapeutic dose for AR is 300 IR.
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111
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Inoue S, Koshiro K, Yoshida Y, De Munck J, Nagakane K, Suzuki K, Sano H, Van Meerbeek B. Hydrolytic Stability of Self-etch Adhesives Bonded to Dentin. J Dent Res 2016; 84:1160-4. [PMID: 16304447 DOI: 10.1177/154405910508401213] [Citation(s) in RCA: 192] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Functional monomers chemically interact with hydroxyapatite that remains within submicron hybrid layers produced by mild self-etch adhesives. The functional monomer 10-MDP interacts most intensively with hydroxyapatite, and its calcium salt appeared most hydrolytically stable, as compared with 4-MET and phenyl-P. We investigated the hypothesis that additional chemical interaction of self-etch adhesives improves bond stability. The micro-tensile bond strength (μTBS) of the 10-MDP-based adhesive did not decrease significantly after 100,000 cycles, but did after 50,000 and 30,000 cycles, respectively, for the 4-MET-based and the phenyl-P-based adhesives. Likewise, the interfacial ultrastructure was unchanged after 100,000 thermocycles for the 10-MDP-based adhesive, while that of both the 4-MET- and phenyl-P-based adhesives contained voids and less-defined collagen. The findings of this study support the concept that long-term durability of adhesive-dentin bonds depends on the chemical bonding potential of the functional monomer.
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112
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Coutinho E, Van Landuyt K, De Munck J, Poitevin A, Yoshida Y, Inoue S, Peumans M, Suzuki K, Lambrechts P, Van Meerbeek B. Development of a Self-etch Adhesive for Resin-modified Glass Ionomers. J Dent Res 2016; 85:349-53. [PMID: 16567557 DOI: 10.1177/154405910608500413] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The favorable self-adhesiveness of resin-modified glass ionomers (RMGIs) might be even further improved if the time-consuming and technically sensitive etch-and-rinse pre-treatment step with polyalkenoic acids could be avoided. We undertook this study to assess the effectiveness of an experimental self-etch adhesive for RMGIs that does not need to be rinsed off. Ultrastructural analysis and micro-tensile bond strength testing to enamel and dentin of a RMGI restorative material and a RMGI adhesive were performed after 4 different surface pre-treatments: no conditioning; 25% polyalkenoic acid; an experimental self-etch adhesive; and 37.5% phosphoric acid followed by the experimental self-etch adhesive. The use of an experimental self-etch adhesive increased the bond strength of RMGIs, especially after an additional conditioning step. Interfacial analysis showed the formation of a thin hydroxyapatite-containing hybrid layer. The self-etch technique enhances the user-friendliness of RMGIs and lowers their technique-sensitivity, while maintaining desirable characteristics of the conventional etch-and-rinse approach with polyalkenoic acids.
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113
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Sakamoto Y, Yoshida Y, Ishikawa H, Ohchi T, Takeshita H, Emi Y, Komatsu H, Sawai T, Shimose T, Oki E, Saeki H, Kakeji Y, Yoshida Y, Baba H, Maehara Y. 189P Phase II trial of S-1 plus panitumumab for wild-type KRAS unresectable colorectal cancer patients previously treated with 5-fluorouracil (5-FU), oxaliplatin and irinotecan (KSCC1103). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw581.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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114
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Marques L, Yoshida Y, Pace N, Moreno N, Pereira A, Santos R, Guedes H, Seabra D, Amorim M, Almeida J, Sousa R, Pinto P, Mahara K, Abe K, Saito M, Terada M, Nagatomo Y, Takanashi S, Venner C, Selton-Suty C, Sellal JM, Mandry D, Marie PY, Juilliere Y, Huttin I. Clinical Cases: Valvular heart disease142A sub-aortic valve mass in a rheumatoid arthritis patient: an unconventional mechanism of aortic regurgitation143Symptomatic severe aortic regurgitation with coronary obstruction due to chronic type a dissection144Mitral valve prolapse and ventricular tachycardia: a long-lasting love story. Eur Heart J Cardiovasc Imaging 2016. [DOI: 10.1093/ehjci/jew234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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115
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Sakamoto Y, Yoshida Y, Ishikawa H, Ohchi T, Takeshita H, Emi Y, Komatsu, Sawai T, Shimose T, Oki E, Saeki H, Kakeji Y, Yoshida Y, Baba H, Maehara Y. 189P Phase II trial of S-1 plus panitumumab for wild-type KRAS unresectable colorectal cancer patients previously treated with 5-fluorouracil (5-FU), oxaliplatin and irinotecan (KSCC1103). Ann Oncol 2016. [DOI: 10.1016/s0923-7534(21)00347-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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116
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Coutinho E, Yoshida Y, Inoue S, Fukuda R, Snauwaert J, Nakayama Y, De Munck J, Lambrechts P, Suzuki K, Van Meerbeek B. Gel Phase Formation at Resin-modified Glass-ionomer/Tooth Interfaces. J Dent Res 2016; 86:656-61. [PMID: 17586714 DOI: 10.1177/154405910708600714] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Ionic bonding between polyalkenoic acid and hydroxyapatite may explain the excellent bonding retention of glass-ionomers in clinical trials. We have here investigated the extent to which the self-adhesiveness of resin-modified glass-ionomers (RMGIs) can be attributed to this chemical bonding capacity. Therefore, the interaction of 3 RMGIs with tooth substrates was comprehensively characterized, with electron and atomic force microscopy correlated with x-ray photoelectron spectroscopy (XPS). Interfacial ultrastructural analysis for 2 RMGIs disclosed a shallow hybridization of hydroxyapatite-coated collagen, on which a submicron gel phase was deposited through reaction of the polyalkenoic acid with calcium extracted from the dentin surface. One RMGI, however, bonded to dentin without hybrid layer or gel phase formation. XPS indicated that polycarboxylic acids included in the RMGIs electrostatically interacted with hydroxyapatite. We conclude that the self-adhesiveness of RMGIs should be attributed to ionic bonding to hydroxyapatite around collagen, and to micro-mechanical interlocking for those RMGIs that additionally hybridize dentin.
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117
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Yoshida Y, Nagakane K, Fukuda R, Nakayama Y, Okazaki M, Shintani H, Inoue S, Tagawa Y, Suzuki K, De Munck J, Van Meerbeek B. Comparative Study on Adhesive Performance of Functional Monomers. J Dent Res 2016; 83:454-8. [PMID: 15153451 DOI: 10.1177/154405910408300604] [Citation(s) in RCA: 654] [Impact Index Per Article: 81.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Mild self-etch adhesives demineralize dentin only partially, leaving hydroxyapatite around collagen within a submicron hybrid layer. We hypothesized that this residual hydroxyapatite may serve as a receptor for chemical interaction with the functional monomer and, subsequently, contribute to adhesive performance in addition to micro-mechanical hybridization. We therefore chemically characterized the adhesive interaction of 3 functional monomers with synthetic hydroxyapatite, using x-ray photoelectron spectroscopy and atomic absorption spectrophotometry. We further characterized their interaction with dentin ultra-morphologically, using transmission electron microscopy. The monomer 10-methacryloxydecyl dihydrogen phosphate (10-MDP) readily adhered to hydroxyapatite. This bond appeared very stable, as confirmed by the low dissolution rate of its calcium salt in water. The bonding potential of 4-methacryloxyethyl trimellitic acid (4-MET) was substantially lower. The monomer 2-methacryloxyethyl phenyl hydrogen phosphate (phenyl-P) and its bond to hydroxyapatite did not appear to be hydrolytically stable. Besides self-etching dentin, specific functional monomers have additional chemical bonding efficacy that is expected to contribute to their adhesive potential to tooth tissue.
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118
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Oh J, Le MD, Nahm HH, Sim H, Jeong J, Perring TG, Woo H, Nakajima K, Ohira-Kawamura S, Yamani Z, Yoshida Y, Eisaki H, Cheong SW, Chernyshev AL, Park JG. Spontaneous decays of magneto-elastic excitations in non-collinear antiferromagnet (Y,Lu)MnO 3. Nat Commun 2016; 7:13146. [PMID: 27759004 PMCID: PMC5075801 DOI: 10.1038/ncomms13146] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Accepted: 09/08/2016] [Indexed: 11/09/2022] Open
Abstract
Magnons and phonons are fundamental quasiparticles in a solid and can be coupled together to form a hybrid quasi-particle. However, detailed experimental studies on the underlying Hamiltonian of this particle are rare for actual materials. Moreover, the anharmonicity of such magnetoelastic excitations remains largely unexplored, although it is essential for a proper understanding of their diverse thermodynamic behaviour and intrinsic zero-temperature decay. Here we show that in non-collinear antiferromagnets, a strong magnon–phonon coupling can significantly enhance the anharmonicity, resulting in the creation of magnetoelastic excitations and their spontaneous decay. By measuring the spin waves over the full Brillouin zone and carrying out anharmonic spin wave calculations using a Hamiltonian with an explicit magnon–phonon coupling, we have identified a hybrid magnetoelastic mode in (Y,Lu)MnO3 and quantified its decay rate and the exchange-striction coupling term required to produce it. The properties of magnetic, crystalline solids can be described in terms of quantum particles of spin-wave and lattice-vibration energy, known as magnons and phonons respectively. Here, the authors show that strong magnon-phonon coupling in a noncollinear antiferromagnet can create magnetoelastic excitations.
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119
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Kawakami T, Tsushima T, Hayashi K, Shirasu H, Kawahira M, Kawai S, Kito Y, Yoshida Y, Hamauchi S, Todaka A, Machida N, Yamazaki K, Yokota T, Fukutomi A, Onozawa Y, Yasui H. Risk factors for esophageal fistula in esophageal squamous cell carcinoma invading adjacent organs (T4b) treated with definitive chemoradiotherapy. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw371.60] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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120
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Fujitani N, Yoshimine T, Shimoda E, Wakai N, Inoue K, Asakawa I, Tamamoto T, Yoshida Y, Ishiuchi S, Hasegawa M. Appropriateness of the Linear-Quadratic Model to Hypofractionated Radiation Therapy In Vivo. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.2128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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121
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Iuchi T, Shingyoji M, Itakura M, Hasegawa Y, Yoshida Y, Ikegami S, Setoguchi T, Ashinuma H. Tyrosine kinase inhibitors alone as a first-line treatment for patients with non-small-cell lung cancer harboring mutant epidermal growth factor receptor. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw383.54] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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122
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Satomi J, Hadeishi H, Yoshida Y, Suzuki A, Nagahiro S. Histopathological Findings in Brains of Patients Who Died in the Acute Stage of Poor-grade Subarachnoid Hemorrhage. Neurol Med Chir (Tokyo) 2016; 56:766-770. [PMID: 27357086 PMCID: PMC5221775 DOI: 10.2176/nmc.oa.2016-0061] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Patients with poor-grade aneurysmal subarachnoid hemorrhage (SAH) are likely to die due to irreversible acute-stage primary brain damage. However, the mechanism(s) and pathology responsible for their high mortality rate remain unclear. We report our findings on the brains of individuals who died in the acute stage of SAH. An autopsy was performed on the brains of 11 SAH patients (World Federation of Neurosurgical Societies grade 5) who died within 3 days of admission and who did not receive respiratory assistance. All brains were free of intracranial hematoma and hydrocephalus; all harbored ruptured aneurysms. In all brains, multiple infarcts with perifocal edema were scattered throughout the cortex and subcortical white matter of the whole brain. Infarcts with a patchy – were more often seen than infarcts with a wedge-shaped pattern. Microscopic examination revealed multiple areas with cytotoxic edema and neuronal death indicative of acute ischemic changes. Edema and congestion were more obvious in areas where the subarachnoid clot tightly adhered to the pia mater. Pathologically, the brains of deceased patients with acute poor-grade SAH were characterized by edema and multifocal infarcts spread throughout the whole brain; they were thought to be attributable to venous ischemia. Diffuse disturbance in venous drainage attributable to an abrupt increase in the intracranial pressure and focal disturbances due to tight adhesion of the subarachnoid clot to the pia mater, may contribute strongly to irreversible brain damage in the acute stage of SAH.
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Hasegawa Y, Iijima Y, Persson K, Nagano K, Yoshida Y, Lamont RJ, Kikuchi T, Mitani A, Yoshimura F. Role of Mfa5 in Expression of Mfa1 Fimbriae in Porphyromonas gingivalis. J Dent Res 2016; 95:1291-7. [PMID: 27323953 DOI: 10.1177/0022034516655083] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Fimbriae are protein-based filamentous appendages that protrude from the bacterial cell surface and facilitate host adhesion. Two types of fimbriae, FimA and Mfa1, of the periodontal pathogen Porphyromonas gingivalis are responsible for adherence to other bacteria and to host cells in the oral cavity. Both fimbrial forms are composed of 5 proteins, but there is limited information about their polymerization mechanisms. Here, the authors evaluated the function of Mfa5, one of the Mfa1 fimbrial accessory proteins. Using mfa5 gene disruption and complementation studies, the authors revealed that Mfa5 affects the incorporation of other accessory proteins, Mfa3 and Mfa4, into fibers and the expression of fimbriae on the cell surface. Mfa5 is predicted to have a C-terminal domain (CTD) that uses the type IX secretion system (T9SS), which is limited to this organism and related Bacteroidetes species, for translocation across the outer membrane. To determine the relationship between the putative Mfa5 CTD and the T9SS, mutants were constructed with in-frame deletion of the CTD and deletion of porU, a C-terminal signal peptidase linked to T9SS-mediated secretion. The ∆CTD-expressing strain presented a similar phenotype to the mfa5 disruption mutant with reduced expression of fimbriae lacking all accessory proteins. The ∆porU mutants and the ∆CTD-expressing strain showed intracellular accumulation of Mfa5. These results indicate that Mfa5 function requires T9SS-mediated translocation across the outer membrane, which is dependent on the CTD, and subsequent incorporation into fibers. These findings suggest the presence of a novel polymerization mechanism of the P. gingivalis fimbriae.
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Sugasawa T, Mukai N, Tamura K, Tamba T, Mori S, Miyashiro Y, Yamaguchi M, Nissato S, Ra S, Yoshida Y, Hoshino M, Ohmori H, Kawakami Y, Takekoshi K. Effects of Cold Stimulation on Mitochondrial Activity and VEGF Expression in vitro. Int J Sports Med 2016; 37:766-78. [PMID: 27116343 DOI: 10.1055/s-0042-102659] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
We aimed to clarify the effects of cold stimulation at various temperatures on mitochondrial activity and vascular endothelial growth factor (VEGF) expression in vitro. Human fibroblast, human mesenchymal stem cell, and rat skeletal muscle myoblast cell lines were used. For each cell type, cells were divided into 4 groups and stimulated in various cold temperatures (0, 4, 17 and 25°C) 3 times for 15 min each by placement on crushed ice or floating on cold water set at each temperature. Control cells were subjected to warm water at 37°C. Factors related to mitochondrial activity, mitochondrial DNA copy numbers, and VEGF expression were analyzed 24 h after the last cold stimulation. In all cell types, significant increases of factors related to mitochondrial activity and mitochondrial DNA copy numbers were seen in the 4°C and 17°C-stimulated cells compared with control cells. In rat skeletal muscle cells stimulated at 4°C, VEGF expression significantly increased compared to the control cells. Our data suggest that cold stimulation at certain temperatures promotes mitochondrial activity, biogenesis and VEGF expression.
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125
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Furui H, Ejiri A, Nagashima Y, Takase Y, Sonehara M, Tsujii N, Yamaguchi T, Shinya T, Togashi H, Homma H, Nakamura K, Takeuchi T, Yajima S, Yoshida Y, Toida K, Takahashi W, Yamazaki H. A model of plasma current through a hole of Rogowski probe including sheath effects. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:043503. [PMID: 27131670 DOI: 10.1063/1.4944941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In TST-2 Ohmic discharges, local current is measured using a Rogowski probe by changing the angle between the local magnetic field and the direction of the hole of the Rogowski probe. The angular dependence shows a peak when the direction of the hole is almost parallel to the local magnetic field. The obtained width of the peak was broader than that of the theoretical curve expected from the probe geometry. In order to explain this disagreement, we consider the effect of sheath in the vicinity of the Rogowski probe. A sheath model was constructed and electron orbits were numerically calculated. From the calculation, it was found that the electron orbit is affected by E × B drift due to the sheath electric field. Such orbit causes the broadening of the peak in the angular dependence and the dependence agrees with the experimental results. The dependence of the broadening on various plasma parameters was studied numerically and explained qualitatively by a simplified analytical model.
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