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1,684 results on '"Sakamoto, Kenji"'

4. Validation of the obesity paradox by body mass index and waist circumference in patients undergoing percutaneous coronary intervention

Author

Shirahama, Yuichiro, Tabata, Noriaki, Sakamoto, Kenji, Sato, Ryota, Yamanaga, Kenshi, Fujisue, Koichiro, Sueta, Daisuke, Araki, Satoshi, Takashio, Seiji, Arima, Yuichiro, Hokimoto, Seiji, Sato, Koji, Sakamoto, Tomohiro, Nakao, Koichi, Shimomura, Hideki, Matsumura, Toshiyuki, Tayama, Shinji, Fujimoto, Kazuteru, Oshima, Shuichi, Nakamura, Shinichi, Tsunoda, Ryusuke, Hirose, Toyoki, Kikuta, Koichi, Sakaino, Naritsugu, Yamamoto, Nobuyasu, Kajiwara, Ichiro, Suzuki, Satoru, Yamamoto, Eiichiro, Kaikita, Koichi, Matsushita, Kenichi, and Tsujita, Kenichi

Published
2022
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5. Identifying Viral Vector Characteristics by Nanopore Sensing

Author

Tsutsui, Makusu, primary, Wada, Mikako, additional, Arima, Akihide, additional, Tsunekawa, Yuji, additional, Sasaki, Takako, additional, Sakamoto, Kenji, additional, Yokota, Kazumichi, additional, Baba, Yoshinobu, additional, Kawai, Tomoji, additional, and Okada, Takashi, additional

Published
2024
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6. Impact of cerebrovascular comorbidity on prognosis in Japanese patients undergoing PCI: 1-year data from Japanese multicenter registry (KICS)

Author

Ahmed, Khlood, Arima, Yuichiro, Tabata, Noriaki, Ishii, Masanobu, Sato, Ryota, Yamashita, Takayoshi, Yamanaga, Kenshi, Takizawa, Hitoshi, Hokimoto, Seiji, Sueta, Daisuke, Araki, Satoshi, Fujisue, Koichiro, Takashio, Seiji, Fujimoto, Kazuteru, Shimomura, Hideki, Tsunoda, Ryusuke, Hirose, Toyoki, Sato, Koji, Kikuta, Koichi, Sakaino, Naritsugu, Nakamura, Shinichi, Yamamoto, Nobuyasu, Matsumura, Toshiyuki, Kajiwara, Ichiro, Tayama, Shinji, Sakamoto, Tomohiro, Nakao, Koichi, Oshima, Shuichi, Yamamoto, Eiichiro, Sakamoto, Kenji, Kaikita, Koichi, Matsushita, Kenichi, and Tsujita, Kenichi

Published
2022
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8. East Asian variant aldehyde dehydrogenase type 2 genotype exacerbates ischemia/reperfusion injury with ST-elevation myocardial infarction in men: possible sex differences

Author

Ishida, Toshifumi, Arima, Yuichiro, Mizuno, Yuji, Harada, Eisaku, Yamashita, Takayoshi, Sueta, Daisuke, Sakamoto, Kenji, Suzuki, Satoru, Kaikita, Koichi, Yamada, Yoshihiro, Shimomura, Hideki, Oniki, Kentaro, Saruwatari, Junji, Hokimoto, Seiji, Yasue, Hirofumi, and Tsujita, Kenichi

Published
2022
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9. Author Correction: The 1-minute sit-to-stand test to detect desaturation during 6-minute walk test in interstitial lung disease

Author

Oishi, Keiji, Matsunaga, Kazuto, Asami-Noyama, Maki, Yamamoto, Tasuku, Hisamoto, Yukari, Fujii, Tetsuya, Harada, Misa, Suizu, Junki, Murakawa, Keita, Chikumoto, Ayumi, Matsuda, Kazuki, Kanesada, Haruka, Kikuchi, Yujiro, Hamada, Kazuki, Uehara, Sho, Suetake, Ryo, Ohata, Syuichiro, Murata, Yoriyuki, Yamaji, Yoshikazu, Sakamoto, Kenji, Ito, Kosuke, Osoreda, Hisayuki, Edakuni, Nobutaka, Kakugawa, Tomoyuki, Hirano, Tsunahiko, and Yano, Masafumi

Published
2022
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10. The 1-minute sit-to-stand test to detect desaturation during 6-minute walk test in interstitial lung disease

Author

Oishi, Keiji, Matsunaga, Kazuto, Asami-Noyama, Maki, Yamamoto, Tasuku, Hisamoto, Yukari, Fujii, Tetsuya, Harada, Misa, Suizu, Junki, Murakawa, Keita, Chikumoto, Ayumi, Matsuda, Kazuki, Kanesada, Haruka, Kikuchi, Yujiro, Hamada, Kazuki, Uehara, Sho, Suetake, Ryo, Ohata, Syuichiro, Murata, Yoriyuki, Yamaji, Yoshikazu, Sakamoto, Kenji, Ito, Kosuke, Osoreda, Hisayuki, Edakuni, Nobutaka, Kakugawa, Tomoyuki, Hirano, Tsunahiko, and Yano, Masafumi

Published
2022
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11. Temporal trends in coronary intervention strategies and the impact on one-year clinical events: data from a Japanese multi-center real-world cohort study

Author

Sakamoto, Kenji, Sato, Ryota, Tabata, Noriaki, Ishii, Masanobu, Yamashita, Takayoshi, Nagamatsu, Suguru, Motozato, Kota, Yamanaga, Kenshi, Hokimoto, Seiji, Sueta, Daisuke, Araki, Satoshi, Fujisue, Koichiro, Arima, Yuichiro, Takashio, Seiji, Fujimoto, Kazuteru, Shimomura, Hideki, Tsunoda, Ryusuke, Hirose, Toyoki, Sato, Koji, Kikuta, Koichi, Sakaino, Naritsugu, Nakamura, Shinichi, Yamamoto, Nobuyasu, Matsumura, Toshiyuki, Kajiwara, Ichiro, Tayama, Shinji, Sakamoto, Tomohiro, Nakao, Koichi, Oshima, Shuichi, Yamamoto, Eiichiro, Kaikita, Koichi, and Tsujita, Kenichi

Published
2022
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17. Murine neonatal ketogenesis preserves mitochondrial energetics by preventing protein hyperacetylation

Author

Arima, Yuichiro, Nakagawa, Yoshiko, Takeo, Toru, Ishida, Toshifumi, Yamada, Toshihiro, Hino, Shinjiro, Nakao, Mitsuyoshi, Hanada, Sanshiro, Umemoto, Terumasa, Suda, Toshio, Sakuma, Tetsushi, Yamamoto, Takashi, Watanabe, Takehisa, Nagaoka, Katsuya, Tanaka, Yasuhito, Kawamura, Yumiko K., Tonami, Kazuo, Kurihara, Hiroki, Sato, Yoshifumi, Yamagata, Kazuya, Nakamura, Taishi, Araki, Satoshi, Yamamoto, Eiichiro, Izumiya, Yasuhiro, Sakamoto, Kenji, Kaikita, Koichi, Matsushita, Kenichi, Nishiyama, Koichi, Nakagata, Naomi, and Tsujita, Kenichi

Published
2021
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18. The Anti-Diabetic Drug Metformin Suppresses Pathological Retinal Angiogenesis via Blocking the mTORC1 Signaling Pathway in Mice (Metformin Suppresses Pathological Angiogenesis).

Author

Yagasaki, Rina, Morita, Akane, Mori, Asami, Sakamoto, Kenji, and Nakahara, Tsutomu

Abstract

Metformin, a biguanide antihyperglycemic drug, can exert various beneficial effects in addition to its glucose-lowering effect. The effects of metformin are mainly mediated by AMP-activated protein kinase (AMPK)-dependent pathway. AMPK activation interferes with the action of the mammalian target of rapamycin complex 1 (mTORC1), and blockade of mTORC1 pathway suppresses pathological retinal angiogenesis. Therefore, in this study, we examined the effects of metformin on pathological angiogenesis and mTORC1 activity in the retinas of mice with oxygen-induced retinopathy (OIR). OIR was induced by exposing the mice to 80% oxygen from postnatal day (P) 7 to P10. The OIR mice were treated with metformin, rapamycin (an inhibitor of mTORC1), or the vehicle from P10 to P12 or P14. The formation of neovascular tufts, revascularization in the central avascular areas, expression of vascular endothelial growth factor (VEGF) and VEGF receptor (VEGFR) 2, and phosphorylated ribosomal protein S6 (pS6), a downstream indicator of mTORC1 activity, were evaluated at P10, P13, or P15. Neovascular tufts and vascular growth in the central avascular areas were observed in the retinas of P15 OIR mice. The formation of neovascular tufts, but not the revascularization in the central avascular areas, was attenuated by metformin administration from P10 to P14. Metformin had no significant inhibitory effect on the expression of VEGF and VEGFR2, but it reduced the pS6 immunoreactivity in vascular cells at the sites of angiogenesis. Rapamycin completely blocked the phosphorylation of ribosomal protein S6 and markedly reduced the formation of neovascular tufts. These results suggest that metformin partially suppresses the formation of neovascular tufts on the retinal surface by blocking the mTORC1 signaling pathway. Metformin may exert beneficial effects against the progression of ocular diseases in which abnormal angiogenesis is associated with the pathogenesis. [ABSTRACT FROM AUTHOR]

Published
2024
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19. The controlling nutritional status score predicts outcomes of cardiovascular events in patients with heart failure with preserved ejection fraction

Author

Komorita, Takashi, Yamamoto, Eiichiro, Sueta, Daisuke, Tokitsu, Takanori, Fujisue, Koichiro, Usuku, Hiroki, Nishihara, Taiki, Oike, Fumi, Takae, Masafumi, Egashira, Koichi, Takashio, Seiji, Ito, Miwa, Yamanaga, Kenshi, Arima, Yuichiro, Sakamoto, Kenji, Suzuki, Satoru, Kaikita, Koichi, and Tsujita, Kenichi

Published
2020
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30. Dyspnea scale and 1-min sit-to-stand test can predict frailty status in interstitial lung disease patients

Author

Oishi, Keiji, primary, Asami-Noyama, Maki, additional, Yamamoto, Tasuku, additional, Hamada, Kazuki, additional, Suetake, Ryo, additional, Ohata, Syuichiro, additional, Sakamoto, Kenji, additional, Murata, Yoriyuki, additional, Yamaji, Yoshikazu, additional, Edakuni, Nobutaka, additional, Hirano, Tsunahiko, additional, and Matsunaga, Kazuto, additional

Published
2023
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33. S-branes from unbalanced black diholes

Author

Sakamoto, Kenji

Subjects
High Energy Physics - Theory
Abstract

We construct new non-singular and time-dependent solutions from the black diholes with unbalanced magnetic charge. These solutions are constructed by the double Wick rotation with the analytic continuation of the mass or NUT-parameter of unbalanced black diholes. In the limit of balanced magnetic charge, our solutions reduce to the S-brane solution obtained from the black diholes discussed by Jones et al. . We study the behaviors of metric components and discuss the s-charge over a constant time-slice. From the properties of the solutions, we find that our solutions correspond to the S-brane type solutions., Comment: 9 pages, 4 figures, REVTeX4

Published
2005

34. Non-invasive testing for sarcopenia predicts future cardiovascular events in patients with chronic kidney disease

Author

Hanatani, Shinsuke, Izumiya, Yasuhiro, Onoue, Yoshiro, Tanaka, Tomoko, Yamamoto, Masahiro, Ishida, Toshifumi, Yamamura, Satoru, Kimura, Yuichi, Araki, Satoshi, Arima, Yuichiro, Nakamura, Taishi, Fujisue, Koichiro, Takashio, Seiji, Sueta, Daisuke, Sakamoto, Kenji, Yamamoto, Eiichiro, Kojima, Sunao, Kaikita, Koichi, and Tsujita, Kenichi

Published
2018
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35. Impact of Chronic Kidney Disease on Outcomes After Percutaneous Coronary Intervention for Chronic Total Occlusions (from the Japanese Multicenter Registry)

Author

Naganuma, Toru, Tsujita, Kenichi, Mitomo, Satoru, Ishiguro, Hisaaki, Basavarajaiah, Sandeep, Sato, Katsumasa, Kobayashi, Tsuyoshi, Obata, Junei, Nagamatsu, Suguru, Yamanaga, Kenshi, Komura, Naohiro, Sakamoto, Kenji, Yamamoto, Eiichiro, Izumiya, Yasuhiro, Kojima, Sunao, Kaikita, Koichi, Ogawa, Hisao, and Nakamura, Sunao

Published
2018
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38. Asymptotic States in Two Black Hole Moduli Space

Author

Sakamoto, Kenji

Subjects
High Energy Physics - Theory, General Relativity and Quantum Cosmology
Abstract

We discuss the quantum states in the moduli space, which constructed with maximally charged dilaton black holes. Considering the quantum mechanics in the moduli space, we obtain the asymptotic states for the near-coincident black holes and the widely separated black holes. We study the scattering process of the dilaton black holes with the asymptotic states. In the scattering process, the quantum effects in the black hole moduli space are investigated., Comment: 17 pages, 8 figures, REVTeX4

Published
2004
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39. One-loop finite potential for N-2 scalars from N quantum fields

Author

Cho, Yoshinori, Kan, Nahomi, Sakamoto, Kenji, and Shiraishi, Kiyoshi

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Theory, Mathematical Physics
Abstract

We study the one-loop effective potential induced from quantum fluctuation of a finite number of fields. A series expansion in terms of the modified Bessel functions is useful to evaluate the one-loop effective potential. We find that at most $N-2$ scalars parameterize the one-loop finite potential and the explicit parameterization is shown. The structure of the potential for N=4 is investigated as the simplest case. The implication of the model is discussed., Comment: 11pages, two eps figures. RevTeX4

Published
2003

40. Non-topological soliton in three-dimensional supergravity

Author

Cho, Yoshinori, Sakamoto, Kenji, and Shiraishi, Kiyoshi

Subjects
General Relativity and Quantum Cosmology
Abstract

We construct numerical solutions for non-topological solitons in three-dimensional U(1)-gauged ${\cal N}=2$ supergravity. We find the region of the solutions showing with the BTZ mass, the angular momentum and the magnetic flux and discuss the relation among the physical parameters for various values of a cosmological constant., Comment: 10 pages, 3 eps figures, RevTeX 3.0, some explanations added

Published
2003

41. Quantum Scattering in Two Black Hole Moduli Space

Author

Sakamoto, Kenji and Shiraishi, Kiyoshi

Subjects
General Relativity and Quantum Cosmology, High Energy Physics - Theory
Abstract

We discuss the quantum scattering process in the moduli space consisting of two maximally charged dilaton black holes. The black hole moduli space geometry has different structures for arbitrary dimensions and various values of dilaton coupling. We study the quantum effects of the different moduli space geometries with scattering process. Then, it is found that there is a resonance state on certain moduli spaces., Comment: 15 pages, 19 figures, RevTeX 3.0

Published
2003
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42. Deconstructing Scalar QED at Zero and Finite Temperature

Author

Kan, Nahomi, Sakamoto, Kenji, and Shiraishi, Kiyoshi

Subjects
High Energy Physics - Theory, High Energy Physics - Phenomenology
Abstract

We calculate the effective potential for the WLPNGB in a world with a circular latticized extra dimension. The mass of the WLPNGB is calculated from the one-loop quantum effect of scalar fields at zero and finite temperature. We show that a series expansion by the modified Bessel functions is useful to calculate the one-loop effective potentials., Comment: 12 pages, 2 figures. RevTeX4

Published
2002
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43. Shape of Deconstruction

Author

Shiraishi, Kiyoshi, Sakamoto, Kenji, and Kan, Nahomi

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Theory
Abstract

We construct a six-dimensional Maxwell theory using a latticized extra space, the continuum limit of which is a shifted torus recently discussed by Dienes. This toy model exhibits the correspondence between continuum theory and discrete theory, and give a geometrical insight to theory-space model building., Comment: 10 pages, 2 figures, RevTeX4. a citation added

Published
2002
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44. Noncommutative gravity in three dimensions coupled to spinning sources

Author

Shiraishi, Kiyoshi, Sakamoto, Kenji, and Kan, Nahomi

Subjects
High Energy Physics - Theory, General Relativity and Quantum Cosmology
Abstract

Noncommutative gravity in three dimensions with vanishing cosmological constant is examined. We find a solution which describes a spacetime in the presence of a torsional source. We estimate the phase shift for each partial wave of a scalar field in the spacetime by the Born approximation., Comment: 13 pages, 1 eps figure

Published
2002

45. Conformal Quantum Mechanics in Two Black Hole Moduli Space

Author

Sakamoto, Kenji and Shiraishi, Kiyoshi

Subjects
High Energy Physics - Theory, General Relativity and Quantum Cosmology
Abstract

We discuss quantum mechanics in the moduli space consisting of two maximally charged dilaton black holes. The quantum mechanics of the two black hole system is similar to the one of DFF model, and this system has the $SL(2,R)$ conformal symmetry. Also, we discuss the bound states in this system., Comment: 15 pages, RevTeX3.0. References added, Minor corrections

Published
2002
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46. Scattering in Two Black Hole Moduli Space

Author

Sakamoto, Kenji and Shiraishi, Kiyoshi

Subjects
General Relativity and Quantum Cosmology
Abstract

In this work, we discuss the quantum mechanics on the moduli space consisting of two maximally charged dilaton black holes. We study the quantum effects resulting from the different structure of the moduli space geometry in the scattering process., Comment: 5 pages, 7 eps files, LaTeX2e with the standard packages graphicx, Presented at The 11th Workshop on General Relativity and Gravitation, Waseda Univ., Japan, Jan. 9-12, 2002

Published
2002

47. Rotating Boson Star with Large Self-interaction in (2+1) dimensions

Author

Sakamoto, Kenji and Shiraishi, Kiyoshi

Subjects
General Relativity and Quantum Cosmology
Abstract

Solutions for rotating boson stars in (2+1) dimensional gravity with a negative cosmological constant are obtained numerically. The mass, particle number, and radius of the (2+1) dimensional rotating boson star are shown. Consequently we find the region where the stable boson star can exist., Comment: 14 pages, 6 figures, RevTeX

Published
1999
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49. Exact Solutions for Boson-Fermion Stars in (2+1) dimensions

Author

Sakamoto, Kenji and Shiraishi, Kiyoshi

Subjects
General Relativity and Quantum Cosmology
Abstract

We solve Einstein equations coupled to a complex scalar field with infinitely large self-interaction, degenerate fermions, and a negative cosmological constant in $(2+1)$ dimensions. Exact solutions for static boson-fermion stars are found when circular symmetry is assumed. We find that the minimum binding energy of boson-fermion star takes a negative value if the value of the cosmological constant is sufficiently small., Comment: 19 pages, 5 figures, RevTeX 3.0, second revised version

Published
1998
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