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Yamada R, Yoshimura T, Mori T, Nishioka K, Koizumi F, Nishikawa N, Fujita Y, Takahashi S, Kanehira T, Yokokawa K, Yamazaki R, Horita K, Tamura H, Wakabayashi Y, Ichiu Y, Aoyama H. Evaluation of Margin for Intra-Fractional Patient Motion during Single-Isocenter Multi Targets Volumetric Modulated Arc Therapy Stereotactic Radiation Therapy for Brain Metastases Using Actual Target Coordinates. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.814] [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: 11/26/2022]
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Suzuki K, Yoshiki M, Nishikawa N, Harada T, Fujita Y, Terui Y, Yoshida T, Tomita T. Visualizing fluid transport inside orally disintegrating tablets and changes in tablets using real-time X-ray radiography and X-ray computed tomography. Drug Dev Ind Pharm 2022; 48:301-309. [PMID: 35913028 DOI: 10.1080/03639045.2022.2108831] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To investigate the disintegration of wet- and dry-compressed orally disintegrating (OD) tablets, with synchrotron radiation as the X-ray source. SIGNIFICANCE Pharmaceutical tablets are vital for treatment of various diseases. Therefore, they are constantly developed to ensure desirable characteristics. In particular, OD tablets need to disintegrate immediately after absorbing saliva. How these tablets absorb saliva is key to enhancing rapid product development. Recently, absorption processes have been investigated using various non-invasive techniques, including X-ray radiography and X-ray computed tomography. However, X-ray radiography studies on how water without a contrast agent is absorbed, moves, and causes a tablet to swell are scarce. Use of a contrast agent is associated with some shortcomings, including complex data analysis in some instances, alterations in the viscosity of water, and potential influence on fluid transport inside the tablet, thus possibly affecting the disintegration process. METHODS Real-time X-ray radiography was used to monitor the disintegration of various tablets, while X-ray computed tomography and software were used to create 3D images. RESULTS We demonstrated how pure water penetrated the wet-compressed tablet faster than inside the dry-compressed tablet, and how the latter swelled more. X-ray computed tomography showed the presence of voids in the tablets following water absorption. CONCLUSION Our methods are promising for non-destructive fluid absorption and transport investigations inside OD tablets.
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Affiliation(s)
- Kazuhiro Suzuki
- Semiconductor Evaluation Laboratory, Evaluation and Analysis Technology Center, Toshiba Nanoanalysis Corporation; 1, Komukai-Toshiba-Cho, Saiwai-ku, Kawasaki, 212-8583, Japan
| | - Masahiko Yoshiki
- Functional Materials Laboratory, Corporate Research & Development Center, Research & Development Division, Toshiba Corporation; 1, Komukai-Toshiba-Cho, Saiwai-ku, Kawasaki, 212-8582, Japan
| | - Norio Nishikawa
- Semiconductor Evaluation Laboratory, Evaluation and Analysis Technology Center, Toshiba Nanoanalysis Corporation; 1, Komukai-Toshiba-Cho, Saiwai-ku, Kawasaki, 212-8583, Japan
| | - Tsutomu Harada
- Division of Pharmaceutics, Department of Pharmacology, Toxicology and Therapeutics, School of Pharmacy, Showa University; 1-5-8, Hatanodai, Shinagawa-ku, Tokyo, 142-8555, Japan
| | - Yoshiaki Fujita
- Laboratory of Pharmaceutical Sciences, Department of Drug Information, School of Pharmacy, Showa University; 1-5-8, Hatanodai, Shinagawa-ku, Tokyo,142-8555, Japan
| | - Yuji Terui
- Engineering Planning Department, Planning Division, Toshiba Nanoanalysis Corporation; 8, Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa, 235-8522, Japan
| | - Takayuki Yoshida
- Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Teikyo Heisei University; 4-21-2, Nakano, Nakano-ku, Tokyo, 164-8530, Japan
| | - Takashi Tomita
- Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Teikyo Heisei University; 4-21-2, Nakano, Nakano-ku, Tokyo, 164-8530, Japan
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Shiraishi K, Masuishi T, Ogata T, Sugiyama K, Nishikawa N, Shibata K, Kudo C, Takayanagi N, Narita Y, Uda H, Kadowaki S, Ando M, Kitagawa C, Kataoka M, Muro K. P-155 A phase I study of FLOT as first-line therapy for Japanese patients with advanced gastric cancer including patients with or without severe peritoneal metastasis. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.210] [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: 11/26/2022] Open
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Nishikawa N, Iwaki H, Shiraishi T, Mukai Y, Takahashi Y, Hattori N. Female, Aging, Low ratio of DCI or lower body weight increases AUC4hr of levodopa in patients with Parkinson's disease. Parkinsonism Relat Disord 2020. [DOI: 10.1016/j.parkreldis.2020.06.225] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ishiguro T, Hatase T, Nishino K, Godo C, Nishikawa N, Umezu H, Motoyama T, Fukuchi T, Enomoto T. Cancer-associated retinopathy in a patient with synchronous fallopian tubal and uterine corpus cancers. EUR J GYNAECOL ONCOL 2019. [DOI: 10.12892/ejgo4778.2019] [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: 11/13/2022]
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Ishiguro T, Chihara M, Nishikawa N, Enomoto T. Superficial cervical scar endometriosis following cone biopsy. CLIN EXP OBSTET GYN 2019. [DOI: 10.12891/ceog4482.2019] [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: 11/01/2022]
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Watanabe S, Hirabayashi M, Hirata N, Hirata N, Noguchi R, Shimaki Y, Ikeda H, Tatsumi E, Yoshikawa M, Kikuchi S, Yabuta H, Nakamura T, Tachibana S, Ishihara Y, Morota T, Kitazato K, Sakatani N, Matsumoto K, Wada K, Senshu H, Honda C, Michikami T, Takeuchi H, Kouyama T, Honda R, Kameda S, Fuse T, Miyamoto H, Komatsu G, Sugita S, Okada T, Namiki N, Arakawa M, Ishiguro M, Abe M, Gaskell R, Palmer E, Barnouin OS, Michel P, French AS, McMahon JW, Scheeres DJ, Abell PA, Yamamoto Y, Tanaka S, Shirai K, Matsuoka M, Yamada M, Yokota Y, Suzuki H, Yoshioka K, Cho Y, Tanaka S, Nishikawa N, Sugiyama T, Kikuchi H, Hemmi R, Yamaguchi T, Ogawa N, Ono G, Mimasu Y, Yoshikawa K, Takahashi T, Takei Y, Fujii A, Hirose C, Iwata T, Hayakawa M, Hosoda S, Mori O, Sawada H, Shimada T, Soldini S, Yano H, Tsukizaki R, Ozaki M, Iijima Y, Ogawa K, Fujimoto M, Ho TM, Moussi A, Jaumann R, Bibring JP, Krause C, Terui F, Saiki T, Nakazawa S, Tsuda Y. Hayabusa2 arrives at the carbonaceous asteroid 162173 Ryugu-A spinning top-shaped rubble pile. Science 2019; 364:268-272. [PMID: 30890588 DOI: 10.1126/science.aav8032] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 03/07/2019] [Indexed: 11/02/2022]
Abstract
The Hayabusa2 spacecraft arrived at the near-Earth carbonaceous asteroid 162173 Ryugu in 2018. We present Hayabusa2 observations of Ryugu's shape, mass, and geomorphology. Ryugu has an oblate "spinning top" shape, with a prominent circular equatorial ridge. Its bulk density, 1.19 ± 0.02 grams per cubic centimeter, indicates a high-porosity (>50%) interior. Large surface boulders suggest a rubble-pile structure. Surface slope analysis shows Ryugu's shape may have been produced from having once spun at twice the current rate. Coupled with the observed global material homogeneity, this suggests that Ryugu was reshaped by centrifugally induced deformation during a period of rapid rotation. From these remote-sensing investigations, we identified a suitable sample collection site on the equatorial ridge.
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Affiliation(s)
- S Watanabe
- Nagoya University, Nagoya 464-8601, Japan. .,Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | | | - N Hirata
- University of Aizu, Aizu-Wakamatsu 965-8580, Japan
| | - Na Hirata
- Kobe University, Kobe 657-8501, Japan
| | - R Noguchi
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - Y Shimaki
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - H Ikeda
- Research and Development Directorate, JAXA, Sagamihara 252-5210, Japan
| | - E Tatsumi
- University of Tokyo, Tokyo 113-0033, Japan
| | - M Yoshikawa
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - S Kikuchi
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - H Yabuta
- Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - T Nakamura
- Tohoku University, Sendai 980-8578, Japan
| | - S Tachibana
- University of Tokyo, Tokyo 113-0033, Japan.,Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - Y Ishihara
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - T Morota
- Nagoya University, Nagoya 464-8601, Japan
| | - K Kitazato
- University of Aizu, Aizu-Wakamatsu 965-8580, Japan
| | - N Sakatani
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - K Matsumoto
- National Astronomical Observatory of Japan, Mitaka 181-8588, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - K Wada
- Chiba Institute of Technology, Narashino 275-0016, Japan
| | - H Senshu
- Chiba Institute of Technology, Narashino 275-0016, Japan
| | - C Honda
- University of Aizu, Aizu-Wakamatsu 965-8580, Japan
| | - T Michikami
- Kindai University, Higashi-Hiroshima 739-2116, Japan
| | - H Takeuchi
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - T Kouyama
- National Institute of Advanced Industrial Science and Technology, Tokyo 135-0064 Japan
| | - R Honda
- Kochi University, Kochi 780-8520, Japan
| | - S Kameda
- Rikkyo University, Tokyo 171-8501, Japan
| | - T Fuse
- National Institute of Information and Communications Technology, Kashima 314-8501, Japan
| | - H Miyamoto
- University of Tokyo, Tokyo 113-0033, Japan
| | - G Komatsu
- Università d'Annunzio, 65127 Pescara, Italy.,Chiba Institute of Technology, Narashino 275-0016, Japan
| | - S Sugita
- University of Tokyo, Tokyo 113-0033, Japan
| | - T Okada
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,University of Tokyo, Tokyo 113-0033, Japan
| | - N Namiki
- National Astronomical Observatory of Japan, Mitaka 181-8588, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - M Arakawa
- Kobe University, Kobe 657-8501, Japan
| | - M Ishiguro
- Seoul National University, Seoul 08826, Korea
| | - M Abe
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - R Gaskell
- Planetary Science Institute, Tucson, AZ 85710, USA
| | - E Palmer
- Planetary Science Institute, Tucson, AZ 85710, USA
| | - O S Barnouin
- Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, USA
| | - P Michel
- Université Côte d'Azur, Observatoire de la Côte d'Azur, Centre National de la Recherche Scientifique (CNRS), Laboratoire Lagrange, 06304 Nice, France
| | - A S French
- University of Colorado, Boulder, CO 80309, USA
| | - J W McMahon
- University of Colorado, Boulder, CO 80309, USA
| | | | - P A Abell
- NASA Johnson Space Center, Houston, TX 77058, USA
| | - Y Yamamoto
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - S Tanaka
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - K Shirai
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - M Matsuoka
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - M Yamada
- Chiba Institute of Technology, Narashino 275-0016, Japan
| | - Y Yokota
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,Kochi University, Kochi 780-8520, Japan
| | - H Suzuki
- Meiji University, Kawasaki 214-8571, Japan
| | - K Yoshioka
- University of Tokyo, Tokyo 113-0033, Japan
| | - Y Cho
- University of Tokyo, Tokyo 113-0033, Japan
| | - S Tanaka
- Kobe University, Kobe 657-8501, Japan
| | | | - T Sugiyama
- University of Aizu, Aizu-Wakamatsu 965-8580, Japan
| | - H Kikuchi
- University of Tokyo, Tokyo 113-0033, Japan
| | - R Hemmi
- University of Tokyo, Tokyo 113-0033, Japan
| | - T Yamaguchi
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - N Ogawa
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - G Ono
- Research and Development Directorate, JAXA, Sagamihara 252-5210, Japan
| | - Y Mimasu
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - K Yoshikawa
- Research and Development Directorate, JAXA, Sagamihara 252-5210, Japan
| | - T Takahashi
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - Y Takei
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - A Fujii
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - C Hirose
- Research and Development Directorate, JAXA, Sagamihara 252-5210, Japan
| | - T Iwata
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - M Hayakawa
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - S Hosoda
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - O Mori
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - H Sawada
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - T Shimada
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - S Soldini
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - H Yano
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - R Tsukizaki
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - M Ozaki
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
| | - Y Iijima
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - K Ogawa
- Kobe University, Kobe 657-8501, Japan
| | - M Fujimoto
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - T-M Ho
- DLR (German Aerospace Center), Institute of Space Systems, 28359 Bremen, Germany
| | - A Moussi
- Centre National d'Etudes Spatiales (CNES), 31401 Toulouse, France
| | - R Jaumann
- DLR, Institute of Planetary Research, 12489 Berlin-Adlershof, Germany
| | - J-P Bibring
- Institute d'Astrophysique Spatiale, 91405 Orsay, France
| | - C Krause
- DLR, Microgravity User Support Center, 51147 Cologne, Germany
| | - F Terui
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - T Saiki
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - S Nakazawa
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan
| | - Y Tsuda
- Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Sagamihara 252-5210, Japan.,SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193, Japan
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Takata Y, Watari J, Nishikawa N, Kamada K. Electrophoretic Banding Patterns of Chromosomal DNA from Yeasts. Journal of the American Society of Brewing Chemists 2018. [DOI: 10.1094/asbcj-47-0109] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Yoshihiro Takata
- Research & Development Laboratories, Sapporo Breweries Ltd., Okatohme 10, Yaizu-shi, Shizuoka, 425 Japan
| | - Junji Watari
- Research & Development Laboratories, Sapporo Breweries Ltd., Okatohme 10, Yaizu-shi, Shizuoka, 425 Japan
| | - Norio Nishikawa
- Research & Development Laboratories, Sapporo Breweries Ltd., Okatohme 10, Yaizu-shi, Shizuoka, 425 Japan
| | - Kôzô Kamada
- Research & Development Laboratories, Sapporo Breweries Ltd., Okatohme 10, Yaizu-shi, Shizuoka, 425 Japan
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Sasaki T, Watari J, Kohgo M, Nishikawa N, Matsui Y. Breeding of a Brewer's Yeast Possessing Anticontaminant Properties. Journal of the American Society of Brewing Chemists 2018. [DOI: 10.1094/asbcj-42-0164] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- T. Sasaki
- Research and Development Laboratories, Sapporo Breweries Ltd., Okatohane, Yaizu 425, Japan
| | - J. Watari
- Research and Development Laboratories, Sapporo Breweries Ltd., Okatohane, Yaizu 425, Japan
| | - M. Kohgo
- Research and Development Laboratories, Sapporo Breweries Ltd., Okatohane, Yaizu 425, Japan
| | - N. Nishikawa
- Research and Development Laboratories, Sapporo Breweries Ltd., Okatohane, Yaizu 425, Japan
| | - Y. Matsui
- Research and Development Laboratories, Sapporo Breweries Ltd., Okatohane, Yaizu 425, Japan
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Iwaki H, Kannnou M, Kubo M, Miyaue N, Tada S, Rina A, Tsujii T, Yabe H, Nishikawa N, Nagai M, Nomoto M. The association between Parkinson's disease and the serum levels of nutritional factors: A cross-sectional study with patient and spouse pairs. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1004] [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: 11/30/2022]
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Murata M, Mihara M, Hasegawa K, Jeon B, Tsai C, Nishikawa N, Oeda T, Yokoyama M, Robieson W, Facheris M, Benesh J. 24-month safety and efficacy of levodopa-carbidopa intestinal gel in Japanese, Korean, and Taiwanese patients with advanced Parkinson’s disease. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.533] [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: 11/26/2022]
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Ando R, Yamanishi Y, Tada S, Miyaue N, Yabe H, Nishikawa N, Nomoto M, Nagai M. Evaluation of correlation between the thickness of rectus abdominis muscle and respiratory function in patients with amyotrophic lateral sclerosis using ultrasound imaging. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.573] [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: 11/28/2022]
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Hara Y, Maeda K, Higa S, Kawamoto K, Nishikawa N, Okazaki Y, Hiramatsu M, Nakahara H, Manabe Y, Wibowo T, Igarashi T, Ogata A. FRI0304 The Change of The Frequency of Right Heart Catheterization for The Diagnosis of Pulmonary Hypertension among Patients with Connective Tissue Diseases in A Hospital in Osaka, Japan – Comparison of The First 5 Years and The Latter 5 Years. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.3391] [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: 11/03/2022]
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Hayashibe M, Homma T, Fujimoto K, Oi T, Yagi N, Kashihara M, Nishikawa N, Ishizumi Y, Abe S, Hashimoto H, Kanekiyo K, Imagita H, Ide C, Morioka S. Locomotor improvement of spinal cord-injured rats through treadmill training by forced plantar placement of hind paws. Spinal Cord 2015; 54:521-9. [PMID: 26481711 DOI: 10.1038/sc.2015.186] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 08/26/2015] [Accepted: 09/04/2015] [Indexed: 01/06/2023]
Abstract
STUDY DESIGN Experimental training model of rats with spinal cord injury (SCI). SETTING Osaka, JapanObjective:To investigate the effect of forced treadmill training by plantar placement (PP), as compared with dorsal placement (DP), of the dorsal paws on the locomotor behaviors of spinal cord-injured rats. METHODS The spinal cord was contusion-injured at the thoracic level. Rats were divided into three groups: forced training involving stepping by PP and DP and non-forced training/assistance (nT). Training began 1 week after injury and was conducted for 4 weeks. Locomotor behaviors were estimated using Basso-Beattie-Bresnahan (BBB) scores, dorsiflexion of the hind paws and footprints of the hind paws. Histological and immunohistochemical examinations of the spinal cord lesions were conducted after 4 weeks of training. RESULTS The values, respectively, of PP, DP and nT groups at 4 weeks of training were as follows: BBB scores were 15.6±0.8, 7.7±1.3 and 10.3±0.4. The paw dorsiflexion angles were 34.1±5.2, 16.4±2.4 and 23.6±3.0 degrees, respectively. The stride angles were 5.1±0.9, 13.7±4.9 and 17.8±4.0 degrees for the left paws. Cavity volumes were 10.3±2.1, 31.0±2.0 and 28.2±4.9%. In addition to cavities, there were astrocyte-devoid areas containing some loose tissues, through which many axons extended longitudinally. CONCLUSIONS The BBB score, dorsiflexion angle and stride angle were consistently improved in the PP group. Cavity formation was more reduced, and many axons extended through coarse tissues formed in astrocyte-devoid areas at the lesion in the PP group. Forced training by PP of the hind paws promoted the behavioral and histological improvement of rats with SCI.
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Affiliation(s)
- M Hayashibe
- Department of Occupational Therapy, Aino University School of Health Sciences, Osaka, Japan.,Department of Neurorehabilitation, Graduate School of Health Sciences, Kio University, Nara, Japan
| | - T Homma
- Institute of Regeneration and Rehabilitation, Aino University School of Health Sciences, Osaka, Japan
| | - K Fujimoto
- Institute of Regeneration and Rehabilitation, Aino University School of Health Sciences, Osaka, Japan
| | - T Oi
- Department of General Education, Wakayama University, Wakayama, Japan
| | - N Yagi
- Department of Rehabilitation, Takatsuki Red Cross Hospital, Osaka, Japan
| | - M Kashihara
- Department of Rehabilitation, Kyoto Kaisei Hospital, Kyoto, Japan
| | - N Nishikawa
- Department of Rehabilitation, Kyoto Kaisei Hospital, Kyoto, Japan
| | - Y Ishizumi
- Department of Rehabilitation, North Osaka Police Hospital, Osaka, Japan
| | - S Abe
- Department of Occupational Therapy, Aino University School of Health Sciences, Osaka, Japan
| | - H Hashimoto
- Department of Occupational Therapy, Aino University School of Health Sciences, Osaka, Japan
| | - K Kanekiyo
- Institute of Regeneration and Rehabilitation, Aino University School of Health Sciences, Osaka, Japan
| | - H Imagita
- Department of Exercise and Functional Physiology, Graduate School of Health Sciences, Kio University, Nara, Japan
| | - C Ide
- Institute of Regeneration and Rehabilitation, Aino University School of Health Sciences, Osaka, Japan
| | - S Morioka
- Department of Neurorehabilitation, Graduate School of Health Sciences, Kio University, Nara, Japan
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15
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Myojin M, Hosokawa M, Tanabe S, Takahashi H, Nishikawa N, Shimizu S. The Common Late Toxicities Observed After Definitive Chemoradiation Therapy for Esophageal Cancer. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.768] [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: 11/29/2022]
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16
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Shimizu S, Nishioka K, Onimaru R, Kinoshita R, Harada K, Nishikawa N, Abe T, Maruyama S, Shinohara N, Shirato H. Decreasing Acute and Late Toxicity Using Urethral Dose Reduction and Smaller Safety Margin Around CTV for Prostate Cancer Intensity Modulated Radiation Therapy (IMRT) With a Real-time Tumor-tracking (RTRT) System. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.468] [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: 10/27/2022]
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17
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Nishioka K, Shimizu S, Onimaru R, Kinoshita R, Harada K, Nishikawa N, Abe T, Maruyama S, Shinohara N, Shirato H. Interfractional Setup Error and Intrafractional Bladder Motion During Radiation Therapy for Bladder Tumors. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.2058] [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: 11/29/2022]
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18
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Choudhury ME, Sugimoto K, Kubo M, Iwaki H, Tsujii T, Kyaw WT, Nishikawa N, Nagai M, Tanaka J, Nomoto M. Zonisamide up-regulated the mRNAs encoding astrocytic anti-oxidative and neurotrophic factors. Eur J Pharmacol 2012; 689:72-80. [PMID: 22659113 DOI: 10.1016/j.ejphar.2012.05.012] [Citation(s) in RCA: 17] [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] [Received: 02/13/2012] [Revised: 04/27/2012] [Accepted: 05/15/2012] [Indexed: 01/28/2023]
Abstract
Zonisamide has been proven as an effective drug for the recovery of degenerating dopaminergic neurons in the animal models of Parkinson's disease. However, several lines of evidence have questioned the neuroprotective capacity of zonisamide in animal models of Parkinson's disease. Although it suppresses dopaminergic neurodegeneration in animal models, the cellular and molecular mechanisms underlying the effectiveness of zonisamide are not fully understood. The current study demonstrates the effects of zonisamide on astrocyte cultures and two 6-hydroxydopamine-induced models of Parkinson's disease. Using primary astrocyte cultures, we showed that zonisamide up-regulated the expression of mRNA encoding mesencephalic astrocyte-derived neurotrophic factor, vascular endothelial growth factor, proliferating cell nuclear antigen, metallothionein-2, copper/zinc superoxide dismutase, and manganese superoxide dismutase. Similar responses to zonisamide were found in substantia nigra where the rats were pre-treated with 6-hydroxydopamine. Notably, pharmacological inhibition of 6-hydroxydopamine-induced toxicity by zonisamide pre-treatment was also confirmed using rat mesencephalic organotypic slice cultures of substantia nigra. In addition to this, zonisamide post-treatment also attenuated the nigral tyrosine hydroxylase-positive neuronal loss induced by 6-hydroxydopamine. Taken together, these studies demonstrate that zonisamide protected dopamine neurons in two Parkinson's disease models through a novel mechanism, namely increasing the expression of some important astrocyte-mediated neurotrophic and anti-oxidative factors.
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Affiliation(s)
- M E Choudhury
- Department of Therapeutic Medicine (Clinical Pharmacology and Neurology), Ehime University Graduate School of Medicine, Shitsukawa, Toon-Shi, Ehime 791-0295, Japan
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19
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Watanabe J, Kubo Y, Ogiya A, Tadokoro Y, Tanaka K, Nishikawa N, Sato M, Takahashi K. 236 Bone Management by Bisphosphonate in Metastatic Breast Cancer Patients. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)70304-0] [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: 11/24/2022]
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20
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Sugaya S, Yahata T, Nishikawa N, Arinami Y, Maruhashi T, Takakuwa K, Tanaka K. Severe Asherman's syndrome complicated with placenta increta conceived by intracytoplasmic sperm injection following hysteroscopic surgery. CLIN EXP OBSTET GYN 2012; 39:547-549. [PMID: 23444767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Although severe Asherman's syndrome is a disease that may cause infertility, pregnancy and childbirth are possible by performing hysteroscopic surgery. However, the obstetrical outcome is not always satisfactory. We report a case where severe Asherman's syndrome occurred following a cesarean section. Hysteroscopic surgery was performed due to secondary infertility, and pregnancy was achieved through a subsequent intracytoplasmic sperm injection. At 23 weeks of gestation, the patient was hospitalized due to the threat of premature labor, and a cesarean section was performed at 29 weeks of gestation after pregnancy-induced hypertension occurred. It was determined to be abnormal adherent placentation such as placenta increta through intraoperative findings, and a cesarean hysterectomy was performed. The pathological diagnosis of the uterus was placenta increta. Due to the risk of complications from placenta increta in pregnancies following hysteroscopic surgery in patients with severe Asherman's syndrome, it is important to realize the high risk involved in such cases during the pregnancy course, and careful perinatal management should be required.
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Affiliation(s)
- S Sugaya
- Department of Obstetrics and Gynecology, Joetsu General Hospital, Joetsu City, Japan.
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21
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Tadokoro Y, Nishikawa N, Ogiya A, Tanaka K, Takahashi K, Mitsuya K, Watanabe J, Yamasaki S, Uematsu T, Kasami M. Breast cancer leptomeningeal metastasis. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e11524] [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: 11/20/2022] Open
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22
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Onodera S, Aoyama H, Hashimoto N, Toyomaki A, Nishikawa N, Tha K, Ogisu K, Terae S, Shirato H. An Internationally Compatible, Japanese Neurocognitive Function Test Battery for the Assessment of Radiation-induced Brain Injury. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.697] [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: 11/26/2022]
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23
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Kyaw WT, Moritoyo T, Nishikawa N, Nagai M, Kubo M, Choudhury M, Nomoto M. P5-12 Evaluation of patients with Parkinson's disease using driving simulator in comparison with neurological signs. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60534-2] [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: 10/18/2022]
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24
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Tanaka T, Kuratsukuri K, Yoshimura R, Morimoto K, Nishikawa N, Nakatani T. MP-03.13: Hyperbaric oxygen (HBO) therapy suppresses the symptoms in painful bladder syndrome/interstitial cystitis (PBS/IC) resistant to conventional treatments: long-term result of a pilot study in Japan. Urology 2010. [DOI: 10.1016/j.urology.2010.07.388] [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: 11/17/2022]
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25
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Furuhama A, Toida T, Nishikawa N, Aoki Y, Yoshioka Y, Shiraishi H. Development of an ecotoxicity QSAR model for the KAshinhou Tool for Ecotoxicity (KATE) system, March 2009 version. SAR QSAR Environ Res 2010; 21:403-13. [PMID: 20818579 PMCID: PMC2946238 DOI: 10.1080/1062936x.2010.501815] [Citation(s) in RCA: 6] [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: 02/18/2008] [Accepted: 04/28/2010] [Indexed: 05/14/2023]
Abstract
The KAshinhou Tool for Ecotoxicity (KATE) system, including ecotoxicity quantitative structure-activity relationship (QSAR) models, was developed by the Japanese National Institute for Environmental Studies (NIES) using the database of aquatic toxicity results gathered by the Japanese Ministry of the Environment and the US EPA fathead minnow database. In this system chemicals can be entered according to their one-dimensional structures and classified by substructure. The QSAR equations for predicting the toxicity of a chemical compound assume a linear correlation between its log P value and its aquatic toxicity. KATE uses a structural domain called C-judgement, defined by the substructures of specified functional groups in the QSAR models. Internal validation by the leave-one-out method confirms that the QSAR equations, with r(2 )> 0.7, RMSE 5, give acceptable q(2) values. Such external validation indicates that a group of chemicals with an in-domain of KATE C-judgements exhibits a lower root mean square error (RMSE). These findings demonstrate that the KATE system has the potential to enable chemicals to be categorised as potential hazards.
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Affiliation(s)
- A Furuhama
- Research Center for Environmental Risk, National Institute for Environmental Studies (NIES), 16-2 Onogawa, Tsukuba 305-8506, Japan.
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26
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Nishikawa N, Nagai M, Moritoyo T, Yabe H, Nomoto M. Plasma amantadine concentrations in patients with Parkinson's disease. Parkinsonism Relat Disord 2008; 15:351-3. [PMID: 18823813 DOI: 10.1016/j.parkreldis.2008.08.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2008] [Revised: 07/31/2008] [Accepted: 08/08/2008] [Indexed: 11/24/2022]
Abstract
We determined plasma amantadine concentrations in patients with Parkinson's disease (PD) in daily clinical practice and investigated the relationship between plasma concentration and adverse reactions to clarify the safe therapeutic range. Seventy-eight consecutive PD patients on stable amantadine treatment were recruited. Plasma concentration of amantadine was measured 3h after the administration of morning amantadine dose. Serum creatinine was measured to estimate renal function. The mean daily dose of amantadine was 135.1+/-62.3mg/day, and the mean plasma amantadine concentration was 812.5+/-839.5 ng/ml (range, 91-4400 ng/ml). Plasma amantadine concentration increased according to increasing renal dysfunction. Three patients exhibited adverse reactions, such as myoclonus, hallucinations, and delirium, and all of them showed plasma amantadine concentration >3000 ng/ml. None of the three cases had previously shown such side effects. PD patients who have not developed any psychiatric symptoms as adverse reactions to the treatment may develop myoclonus, hallucination, or delirium when the plasma concentration of amantadine exceeds 3000 ng/ml. It is therefore recommended to use amantadine at the plasma concentration of less than 3000 ng/ml in the treatment of Parkinson's disease, especially in elderly patients.
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Affiliation(s)
- N Nishikawa
- Department of Medicine (Neurology), Ehime University Graduate School of Medicine, Shitsukawa Tohon, Ehime 791-0295, Japan
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27
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Suzuki H, Toyota M, Carraway H, Gabrielson E, Ohmura T, Fujikane T, Nishikawa N, Sogabe Y, Nojima M, Sonoda T, Mori M, Hirata K, Imai K, Shinomura Y, Baylin SB, Tokino T. Erratum: Frequent epigenetic inactivation of Wnt antagonist genes in breast cancer. Br J Cancer 2008. [PMCID: PMC2480974 DOI: 10.1038/sj.bjc.6604507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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28
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Suzuki H, Toyota M, Carraway H, Caraway H, Gabrielson E, Ohmura T, Fujikane T, Nishikawa N, Sogabe Y, Nojima M, Sonoda T, Mori M, Hirata K, Imai K, Shinomura Y, Baylin SB, Tokino T. Frequent epigenetic inactivation of Wnt antagonist genes in breast cancer. Br J Cancer 2008; 98:1147-56. [PMID: 18283316 PMCID: PMC2275475 DOI: 10.1038/sj.bjc.6604259] [Citation(s) in RCA: 187] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Although mutation of APC or CTNNB1 (β-catenin) is rare in breast cancer, activation of Wnt signalling is nonetheless thought to play an important role in breast tumorigenesis, and epigenetic silencing of Wnt antagonist genes, including the secreted frizzled-related protein (SFRP) and Dickkopf (DKK) families, has been observed in various tumours. In breast cancer, frequent methylation and silencing of SFRP1 was recently documented; however, altered expression of other Wnt antagonist genes is largely unknown. In the present study, we found frequent methylation of SFRP family genes in breast cancer cell lines (SFRP1, 7 out of 11, 64%; SFRP2, 11 out of 11, 100%; SFRP5, 10 out of 11, 91%) and primary breast tumours (SFRP1, 31 out of 78, 40%; SFRP2, 60 out of 78, 77%; SFRP5, 55 out of 78, 71%). We also observed methylation of DKK1, although less frequently, in cell lines (3 out of 11, 27%) and primary tumours (15 out of 78, 19%). Breast cancer cell lines express various Wnt ligands, and overexpression of SFRPs inhibited cancer cell growth. In addition, overexpression of a β-catenin mutant and depletion of SFRP1 using small interfering RNA synergistically upregulated transcriptional activity of T-cell factor/lymphocyte enhancer factor. Our results confirm the frequent methylation and silencing of Wnt antagonist genes in breast cancer, and suggest that their loss of function contributes to activation of Wnt signalling in breast carcinogenesis.
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Affiliation(s)
- H Suzuki
- First Department of Internal Medicine, Sapporo Medical University, Sapporo, Japan
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29
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Nishikawa N, Sato T, Suzumori N, Sonta S, Suzumori K. Meiotic segregation analysis in male translocation carriers by using fluorescent in situ hybridization. ACTA ACUST UNITED AC 2007; 31:60-6. [PMID: 17459123 DOI: 10.1111/j.1365-2605.2007.00759.x] [Citation(s) in RCA: 8] [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: 11/30/2022]
Abstract
Balanced reciprocal and Robertsonian translocations are the most common structural chromosome abnormalities in humans, with incidences of 0.7 and 1.23 per 1000. These translocations can affect fertility and/or pregnancy outcome because of possibly impaired production of gametes with an unbalanced zygote caused by the parental arrangement. Fertility problems in male translocation carriers are because of various degrees of sperm alterations that are directly related to the disturbance of the meiotic process. Investigation of human sperm chromosomes was performed by karyotyping spermatozoa after penetration of zona-free hamster oocytes, karyotype analysis now being possible to analyse the segregation patterns by using fluorescent in situ hybridization (FISH). Here, we document the results of meiotic segregation analysis for four Robertsonian and four reciprocal translocation carriers by FISH. In the sperm of Robertsonian translocation males, the majority of spermatozoa were normal/balanced. On the other hand, males with reciprocal translocations demonstrated a high rate of unbalanced spermatozoa of about 50% on meiotic segregation, with an unusually high rate (23.5%) of 3 : 1 segregation. This knowledge can be used for genetic counselling of families with these types of translocations.
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Affiliation(s)
- N Nishikawa
- Obstetrics and Gynaecology, Johoku Municipal Hospital, Nagoya, Japan
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30
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Nojima M, Suzuki H, Toyota M, Watanabe Y, Maruyama R, Sasaki S, Sasaki Y, Mita H, Nishikawa N, Yamaguchi K, Hirata K, Itoh F, Tokino T, Mori M, Imai K, Shinomura Y. Frequent epigenetic inactivation of SFRP genes and constitutive activation of Wnt signaling in gastric cancer. Oncogene 2007; 26:4699-713. [PMID: 17297461 DOI: 10.1038/sj.onc.1210259] [Citation(s) in RCA: 176] [Impact Index Per Article: 10.4] [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: 12/15/2022]
Abstract
Activation of Wnt signaling has been implicated in gastric tumorigenesis, although mutations in APC (adenomatous polyposis coli), CTNNB1 (beta-catenin) and AXIN are seen much less frequently in gastric cancer (GC) than in colorectal cancer. In the present study, we investigated the relationship between activation of Wnt signaling and changes in the expression of secreted frizzled-related protein (SFRP) family genes in GC. We frequently observed nuclear beta-catenin accumulation (13/15; 87%) and detected the active form of beta-catenin in most (12/16; 75%) GC cell lines. CpG methylation-dependent silencing of SFRP1, SFRP2 and SFRP5 was frequently seen among GC cell lines (SFRP1, 16/16, 100%; SFRP2, 16/16, 100%; SFRP5, 13/16, 81%) and primary GC specimens (SFRP1, 42/46, 91%; SFRP2, 44/46, 96%; SFRP5, 30/46, 65%), and treatment with the DNA methyltransferase inhibitor 5-aza-2'-deoxycytidine rapidly restored SFRP expression. Ectopic expression of SFRPs downregulated T-cell factor/lymphocyte enhancer factor transcriptional activity, suppressed cell growth and induced apoptosis in GC cells. Analysis of global expression revealed that overexpression of SFRP2 repressed Wnt target genes and induced changes in the expression of numerous genes related to proliferation, growth and apoptosis in GC cells. It thus appears that aberrant SFRP methylation is one of the major mechanisms by which Wnt signaling is activated in GC.
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Affiliation(s)
- M Nojima
- First Department of Internal Medicine, Sapporo Medical University, Sapporo, Japan
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31
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Terasawa K, Toyota M, Sagae S, Ogi K, Suzuki H, Sonoda T, Akino K, Maruyama R, Nishikawa N, Imai K, Shinomura Y, Saito T, Tokino T. Epigenetic inactivation of TCF2 in ovarian cancer and various cancer cell lines. Br J Cancer 2006; 94:914-21. [PMID: 16479257 PMCID: PMC2361363 DOI: 10.1038/sj.bjc.6602984] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Transcription factor 2 gene (TCF2) encodes hepatocyte nuclear factor 1β (HNF1β), a transcription factor associated with development and metabolism. Mutation of TCF2 has been observed in renal cell cancer, and by screening aberrantly methylated genes, we have now identified TCF2 as a target for epigenetic inactivation in ovarian cancer. TCF2 was methylated in 53% of ovarian cancer cell lines and 26% of primary ovarian cancers, resulting in loss of the gene's expression. TCF2 expression was restored by treating cells with a methyltransferase inhibitor, 5-aza-2′deoxycitidine (5-aza-dC). In addition, chromatin immunoprecipitation showed deacetylation of histone H3 in methylated cells and, when combined with 5-aza-dC, the histone deacetylase inhibitor trichostatin A synergistically induced TCF2 expression. Epigenetic inactivation of TCF2 was also seen in colorectal, gastric and pancreatic cell lines, suggesting general involvement of epigenetic inactivation of TCF2 in tumorigenesis. Restoration of TCF2 expression induced expression of HNF4α, a transcriptional target of HNF1β, indicating that epigenetic silencing of TCF2 leads to alteration of the hepatocyte nuclear factor network in tumours. These results suggest that TCF2 is involved in the development of ovarian cancers and may represent a useful target for their detection and treatment.
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Affiliation(s)
- K Terasawa
- Department of Obstetrics and Gynecology, Sapporo Medical University, Sapporo 060-8543, Japan
| | - M Toyota
- Department of Molecular Biology, Cancer Research Institute, Sapporo Medical University, Sapporo 060-8543, Japan
- First Department of Internal Medicine, Sapporo Medical University, Sapporo 060-8543, Japan
- PRESTO, JST, Kawaguchi, Japan
- Department of Molecular Biology, Cancer Research Institute, South-1 West-17, Chuo-ku, Sapporo, Hokkaido, Japan. E-mail:
| | - S Sagae
- Department of Obstetrics and Gynecology, Sapporo Medical University, Sapporo 060-8543, Japan
| | - K Ogi
- Department of Molecular Biology, Cancer Research Institute, Sapporo Medical University, Sapporo 060-8543, Japan
| | - H Suzuki
- Department of Public Health, Sapporo 060-8543, Japan
| | - T Sonoda
- Department of Public Health, Sapporo 060-8543, Japan
| | - K Akino
- Department of Molecular Biology, Cancer Research Institute, Sapporo Medical University, Sapporo 060-8543, Japan
- First Department of Internal Medicine, Sapporo Medical University, Sapporo 060-8543, Japan
| | - R Maruyama
- First Department of Internal Medicine, Sapporo Medical University, Sapporo 060-8543, Japan
| | - N Nishikawa
- Department of Molecular Biology, Cancer Research Institute, Sapporo Medical University, Sapporo 060-8543, Japan
- First Department of Surgery, Sapporo Medical University, Sapporo 060-8543, Japan
| | - K Imai
- First Department of Internal Medicine, Sapporo Medical University, Sapporo 060-8543, Japan
| | - Y Shinomura
- First Department of Internal Medicine, Sapporo Medical University, Sapporo 060-8543, Japan
| | - T Saito
- Department of Obstetrics and Gynecology, Sapporo Medical University, Sapporo 060-8543, Japan
| | - T Tokino
- Department of Molecular Biology, Cancer Research Institute, Sapporo Medical University, Sapporo 060-8543, Japan
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32
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Aoki Y, Amikura T, Nishikawa N, Sekine M, Yahata T, Fujita K, Tanaka K. Irinotecan hydrochloride (CPT-11) and mitomycin C in docetaxel-carbopoatin (DJ) refractory ovarian cancer. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.5143] [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: 11/20/2022] Open
Affiliation(s)
- Y. Aoki
- Niigata Univ Graduate Sch of Medcl and, Niigata, Japan
| | - T. Amikura
- Niigata Univ Graduate Sch of Medcl and, Niigata, Japan
| | - N. Nishikawa
- Niigata Univ Graduate Sch of Medcl and, Niigata, Japan
| | - M. Sekine
- Niigata Univ Graduate Sch of Medcl and, Niigata, Japan
| | - T. Yahata
- Niigata Univ Graduate Sch of Medcl and, Niigata, Japan
| | - K. Fujita
- Niigata Univ Graduate Sch of Medcl and, Niigata, Japan
| | - K. Tanaka
- Niigata Univ Graduate Sch of Medcl and, Niigata, Japan
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33
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Yamada S, Yamada K, Nishikawa N, Hioki R, Nirasawa M, Kii K, Ryugo H, Iwama M, Fukuda M. Determination of vitamin B12 using the enzyme glycerol dehydrase. Scand J Clin Lab Invest 2005; 64:185-94. [PMID: 15222628 DOI: 10.1080/00365510410001158] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Glycerol dehydrase is an enzyme that catalyzes dehydration of glycerol into beta-propionaldehyde. It requires 5'-deoxyadenosylcobalamin, one of the forms of vitamin B12, as a coenzyme. The enzyme is inactivated in vitro by all forms of vitamin B12 stoichiometrically. The objective of this study was to determine vitamin B12 content by utilizing the inactivation of the enzyme by vitamin B12. After various examinations, an excellent standard curve was obtained up to 1 pmol vitamin B12 using 14 mU of the enzyme per tube. Glycerol dehydrase does not respond to vitamin B12 if it is bound to haptocorrin, a vitamin B12-binding protein. This necessitates a procedure for extraction of vitamin B12 from samples before assay. The enzyme was less inactivated by 5'-deoxyadenosylcobalamin than any other form of vitamin B12. However, this did not matter because all forms of vitamin B12 were converted into cyanocobalamin during the extraction procedure cited above, which was performed in a buffer containing potassium cyanide.
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Affiliation(s)
- S Yamada
- Laboratory of Nutrition, Faculty of Education, Hokkaido University of Education, Sapporo, Japan.
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34
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Akita Y, Kozaki K, Nakagawa A, Saito T, Ito S, Tamada Y, Fujiwara S, Nishikawa N, Uchida K, Yoshikawa K, Noguchi T, Miyaishi O, Shimozato K, Saga S, Matsumoto Y. Cyclooxygenase-2 is a possible target of treatment approach in conjunction with photodynamic therapy for various disorders in skin and oral cavity. Br J Dermatol 2004; 151:472-80. [PMID: 15327557 DOI: 10.1111/j.1365-2133.2004.06053.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [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: 01/13/2023]
Abstract
BACKGROUND Anti-cancer effects of cyclooxygenase (COX)-2 inhibitors have been reported, but not fully investigated in skin and oral diseases. 5-aminolaevulinic acid (ALA)-based photodynamic therapy (PDT) for treating those patients with skin and oral lesions is a highly sophisticated procedure, but the incidence of disease recurrence after treatment is rather significant. OBJECTIVE To confirm that COX-2 could be a molecular target in adjunctive therapy to ALA-based PDT, we investigated (i) COX-2 expression in various skin and oral diseases, and (ii) the inhibitory effects on cellular growth of COX-2 selective inhibitor (nimesulide), ALA-based PDT and their combination on human oral squamous cell carcinoma (SCC) cell lines. METHODS A total of 129 biopsy samples from the skin and oral mucosal lesions were tested immunohistochemically for COX-2 expression. Then the in vitro effects of nimesulide, ALA-based PDT, and their combination were determined on two SCC cell lines, HSC-2 and HSC-4. Three different methods (MTT assay, double-staining for annexin V and propidium iodide, caspase-3/CPP32 fluorometric protease assay) were applied for evaluation of their inhibitory effects on these two cell lines. RESULTS Among the skin diseases, a considerable number of COX-2 high expressers were found in actinic keratosis (15 of 25, 60%), Bowen's disease (13 of 17, 76%) and extramammary Paget's disease (15 of 15, 100%). In contrast, only one of 33 (3%) basal cell carcinoma tumours was a COX-2 high expresser. Among the oral mucosal biopsies, the proportion of COX-2 high expressers increased gradually from hyperplasia (one of six, 17%) through mild dysplasia (five of eight, 63%) and moderate dysplasia (20 of 23, 87%) to severe dysplasia (two of two, 100%). Nimesulide had an inhibitory effect in vitro on HSC-2 (proven to be a COX-2 high expresser), but not on HSC-4 (a COX-2 non-expresser). While ALA-based PDT showed an inhibitory effect on both HSC-2 and HSC-4, most importantly the combination of nimesulide and ALA-based PDT demonstrated a significant synergistic effect on the cellular growth inhibition of only HSC-2, but not of HSC-4. CONCLUSIONS Our study strongly suggests that COX-2 can be one of the molecular targets in treating various skin and oral diseases. The results from our in vitro experiments also prompt us to develop a new protocol with a combination of COX-2 selective inhibitor and ALA-based PDT for more effective treatment of those diseases.
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Affiliation(s)
- Y Akita
- Department of Pathology, Aichi Medical University School of Medicine, Nagakute, Aichi 480-1195, Japan
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Tanizawa Y, Johna N, Yamamoto Y, Nishikawa N. Salivary films on hydroxyapatite studied by an in vitro system for investigating the effect of metal ions and by a quartz-crystal microbalance system for monitoring layer-by-layer film formation. J Cosmet Sci 2004; 55:163-76. [PMID: 15131728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Accepted: 01/26/2004] [Indexed: 04/29/2023]
Abstract
The salivary film or the acquired pellicle is a protein film formed initially on the enamel surface of teeth. Such a film plays an important role in enamel protection, but is also an initial substructure for the formation of plaque and the cosmetically undesirable colored stain. The composition and the structure of the film are still essentially unknown because of the difficulty of its isolation for characterization. The purpose of this study was to investigate the effect of some metal cations on the salivary film or the pellicle formation, and also to clarify the mechanism of development. First, using infrared spectroscopy (IR) and X-ray photoelectron spectroscopy (XPS), the in situ-formed film in the mouth was confirmed to contain selectively adsorbed well-known proteins. Then, in vitro studies have demonstrated that Ca2+ ions enhance film formation at the initial stage in virtue of Ca bridging and, interestingly, that Mg2+ ions oppositely inhibit the formation. Furthermore, the quartz-crystal microbalance (QCM), utilized successfully for the first time to study the salivary film, has shown the possibility of an alternate accumulation mechanism by which the surface charges on the film are effectively reversed by the opposite charged proteins.
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Affiliation(s)
- Y Tanizawa
- Analytical Research Center, Lion Corporation, Hirai, Edogawa-ku, Tokyo 132-0035, Japan
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36
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Tanemura M, Suzumori K, Nishikawa N, Ishihara Y. Multicolour spectral karyotyping for complex chromosomal rearrangements in repeated abortion or congenital anomalies. Prenat Diagn 2001; 21:1123-8. [PMID: 11787036 DOI: 10.1002/pd.183] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Advances in molecular cytogenetics, especially the technique of fluorescence in situ hybridization (FISH), have allowed more precise definition of chromosomal structures, which are difficult to identify using conventional G-banding. Recently, a novel approach based on hybridization of 24 fluorescent-labelled chromosome painting probes was developed, termed spectral karyotyping (SKY), which allows the simultaneous and differential colour display of all human chromosomes. We have used SKY to identify not only five parental complex translocation carriers but also minute chromosome rearrangements in the fetus. Here, we concentrate attention on the clinical application of SKY for prenatal diagnosis.
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Affiliation(s)
- M Tanemura
- Department of Obstetrics and Gynaecology, Nagoya City University Medical School, Nagoya, Japan
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37
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Nishikawa N, Masuyama T, Yamamoto K, Sakata Y, Mano T, Miwa T, Sugawara M, Hori M. Long-term administration of amlodipine prevents decompensation to diastolic heart failure in hypertensive rats. J Am Coll Cardiol 2001; 38:1539-45. [PMID: 11691537 DOI: 10.1016/s0735-1097(01)01548-0] [Citation(s) in RCA: 36] [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: 10/18/2022]
Abstract
UNLABELLED OBJECTIVES; We assessed the effects of long-term amlodipine administration in a diastolic heart failure (DHF) rat model with preserved systolic function as well as the relationship between changes in left ventricular (LV) myocardial stiffening and alterations in extracellular matrix. BACKGROUND Although the effect of long-term administration of amlodipine has been shown to be disappointing in patients with systolic failure, the effect is unknown in those with DHF. METHODS Dahl salt-sensitive rats fed a high-salt diet for seven weeks were divided into three groups: eight untreated rats (DHF group), eight rats given high-dose amlodipine (10 mg/kg/day; HDA group) and seven rats given low-dose amlodipine (1 mg/kg/day; LDA group). RESULTS High-dose administration of amlodipine decreased systolic blood pressure and controlled excessive hypertrophy, without a decrease in the collagen content, and prevented the elevation of LV end-diastolic pressure at 19 weeks. Low-dose administration of amlodipine with subdeppressive effects did not control either hypertrophy or fibrosis; however, it prevented myocardial stiffening and, hence, the elevation of LV end-diastolic pressure. The ratio of type I to type III collagen messenger ribonucleic acid levels was significantly lower in both the HDA and LDA groups than in the DHF group. CONCLUSIONS Long-term administration of amlodipine prevented the transition to DHF both at the depressor and subdepressor doses. Amlodipine did not decrease the collagen content, but attenuated myocardial stiffness, with inhibition of the phenotype shift from type III to type I collagen. Thus, amlodipine may exert beneficial effects through amelioration of collagen remodeling in the treatment of DHF.
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Affiliation(s)
- N Nishikawa
- Department of Internal Medicine and Therapeutics (A8), Suita, Japan
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39
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Sakata Y, Yamamoto K, Masuyama T, Mano T, Nishikawa N, Kuzuya T, Miwa T, Hori M. Ventricular production of natriuretic peptides and ventricular structural remodeling in hypertensive heart failure. J Hypertens 2001; 19:1905-12. [PMID: 11593113 DOI: 10.1097/00004872-200110000-00027] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [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: 11/26/2022]
Abstract
OBJECTIVES Brain natriuretic peptide (BNP) is a strong predictor of left ventricular (LV) hypertrophy (LVH) and dysfunction. However, our recent studies suggested that LVH is not necessarily associated with enhanced production of BNP in hypertension. This study aimed to clarify the relation of the characteristics of hypertrophy with the degree of gene expression of BNP in the developmental process of hypertensive heart failure. METHODS Serial changes in LV geometry, histology and atrial natriuretic peptide (ANP) and BNP mRNA levels, were assessed in a hypertensive heart failure model using Dahl salt-sensitive rats (n = 24). We further studied effects of alpha1-receptor antagonist (doxazosin: 1 mg/kg per day, n = 5) and angiotensin II type 1 receptor (AT1R) antagonist (candesartan cilexetil: 1 mg/kg per day, n = 5). RESULTS The BNP mRNA level was not elevated at the compensatory hypertrophic stage when ANP mRNA level was elevated. BNP mRNA level was increased with further progression of hypertrophy and development of fibrosis. AT1R blockade prevented such fibrosis and further progression of hypertrophy with normalization of BNP mRNA levels. Compensatory hypertrophy was not suppressed; therefore, ANP mRNA level, although decreased, was still beyond the normal level. The alpha1-receptor blockade slightly attenuated LV hypertrophy with a slight decrease in ANP mRNA levels. LV fibrosis was not prevented, and the BNP mRNA level was not decreased. CONCLUSIONS BNP gene expression is not enhanced by initial compensatory hypertrophy, but is enhanced by LV fibrosis and late stage progression of hypertrophy dependent on AT1R-mediated signaling pathway.
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Affiliation(s)
- Y Sakata
- Department of Internal Medicine and Therapeutics, Osaka University Graduate School of Medicine, Suita, Japan
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Tanemura M, Nishikawa N, Kojima K, Suzuki Y, Suzumori K. A case of successful fetal therapy for congenital chylothorax by intrapleural injection of OK-432. Ultrasound Obstet Gynecol 2001; 18:371-375. [PMID: 11778998 DOI: 10.1046/j.0960-7692.2001.00536.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A 38-year-old multiparous woman was referred at 19 weeks' gestation because of hydrops fetalis. Ultrasonic examination revealed severe pleural effusion, ascites and skin edema. Detailed examination of the amniotic fluid, fetal blood and intrathoracic fluid led to a diagnosis of congenital fetal chylothorax. Repeated thoracocenteses were not effective in improving the hydrops fetalis. We introduced fetal treatment for the pleural effusion by an intrapleural injection of OK-432 at 23, 24 and 25 weeks' gestation. The pleural effusion was reduced by adhesion of the intrathoracic space and resulted in the delivery of a neonate who was healthy except for right renal dysfunction. Pulmonary hypoplasia was successfully prevented by OK-432.
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Affiliation(s)
- M Tanemura
- Department of Obstetrics and Gynecology, Nagoya City University Medical School, Nagoya, Japan.
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Arai N, Matsumoto A, Nishikawa N, Yonekura K, Eto Y, Kuwada Y, Sugiura S, Takenaka K, Hirata Y, Nagai R, Aoyagi T. Beta-blocker therapy improved symptoms and exercise capacity in a patient with dynamic intra-right ventricular obstruction: an atypical Form of double-chambered right ventricle. J Am Soc Echocardiogr 2001; 14:650-3. [PMID: 11391298 DOI: 10.1067/mje.2001.110782] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- N Arai
- Department of Cardiovascular Medicine, University of Tokyo, Graduate School of Medicine, Japan
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Fukuda S, Sakai N, Kamata SE, Nameki H, Kishimoto S, Nishikawa N, Kaneko S, Miyata M, Fujii M, Inuyama Y. Surgical results of skull base surgery for the treatment of head and neck malignancies involving skull base: multi-institutional studies on 143 cases in Japan. Auris Nasus Larynx 2001; 28 Suppl:S71-5. [PMID: 11683348 DOI: 10.1016/s0385-8146(01)00083-9] [Citation(s) in RCA: 17] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
We analyzed 143 cases of skull base surgery collected from the eight institutions of the Study Group supported by the Grant-in-Aid for Cancer Research from the Ministry of Health and Welfare of Japan. Histologically, the most common type was squamous cell carcinoma (n = 78), which was followed by olfactory neuroblastoma (n = 16) and adenoid cystic carcinoma (n = 16). The most frequent surgical approach was frontal craniotomy (n = 66), followed by front-temporal craniotomy (n = 54) and infratemporal fossa approach (n = 8). For repair of dura matter, fascia lata was used in 37 cases. galeopericranial flap in 35 and temporal muscle fascia in 16. The 5-year survival rate by Kaplan-Meier method of nose and paranasal sinus carcinoma (n = 119) was 48%. As for histological classification, the survival rates were both 65%) in adenoid cystic carcinoma (n = 12) and bone soft tissue malignancy (n = 10), 62% in olfactory neuroblastoma (n = 16), 46% in squamous cell carcinoma (n = 62) and 33% in adenocarcinoma (n = 11). All the three cases of malignant melanoma died within 1 year, so we considered skull base surgery to be contraindicated for this disease. Complications were observed in 62 out of the 143 cases (43%); local infection was most frequent in 29 cases. liquorrhea in 18, abscess in 16, necrosis of the flap and meningitis in ten cases, DIC in four, rupture of the internal carotid artery in two and cerebral thrombosis in one. Death caused directly by surgery was in ten cases (7%). It is important that a multi-center registry be maintained to have a large enough database for comparison of results, and prognosis for each histological entity and further define the role of multidisciplinary treatment.
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Affiliation(s)
- S Fukuda
- Department of Otolaryngology, Hokkaido University School of Medicine, Sapporo, Japan.
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Kida H, Nishikawa N, Ohta M, Miyao S, Takimoto H. [A case of suspected pulmonary air embolism in endoscopic neurosurgery]. Masui 2001; 50:419-21. [PMID: 11345759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
Sudden reduction in end-tidal PCO2 and SpO2 occurred during the endoscopic third ventriculostomy in a patient with hydrocephalus under general anesthesia. We suspect that it was caused by pulmonary air embolism. A 63-year-old female was scheduled for endoscopic third ventriculostomy under general anesthesia. Endoscopic manipulation caused hemorrhage from chorioid plexus 21 minutes after the procedure was begun, and intraventricular irrigation was performed to achieve hemostasis. In the subsequent 3 minutes, end-tidal PCO2 declined from 26 mmHg to 15 mmHg (PaCO2 39.6 mmHg), and SpO2 declined from 98% to 92% (PaO2 69.2 mmHg). Nitrous oxide was discontinued immediately because pulmonary air embolism was suspected and the oxygen concentration was increased to 100%. At the same time the surgical procedure was discontinued. After 15 minutes, end-tidal PCO2 recovered to 25 mmHg, and SpO2 recovered to 98% (PaO2 136.5 mmHg), and surgery was resumed. The patient recovered from anesthesia. The chest X-p at the end of operation, and pulmonary scintigraphy on the following day revealed no abnormal findings, but brain CT demonstrated a large quantity of air in both lateral ventricles.
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Affiliation(s)
- H Kida
- Department of Anesthesia and Department of Neurosurgery, Suita Municipal Hospital, Suita 564-0082
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Kawaguchi S, Okuno S, Sakaki T, Nishikawa N. Effect of carotid endarterectomy on chronic ocular ischemic syndrome due to internal carotid artery stenosis. Neurosurgery 2001; 48:328-32; discussion 322-3. [PMID: 11220375 DOI: 10.1097/00006123-200102000-00016] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [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: 11/26/2022] Open
Abstract
OBJECTIVE We evaluated the effect of carotid endarterectomy on chronic ocular ischemic syndrome due to internal carotid artery stenosis by use of data obtained from ophthalmic artery color Doppler flow imaging. METHODS We examined 11 patients with ocular ischemic syndrome due to internal carotid artery stenosis (>70% stenosis) who were being treated by carotid endarterectomy. Ophthalmic artery color Doppler flow imaging indicated ophthalmic artery flow direction and peak systolic flow velocity and was performed before and at 1 week, 1 month, and 3 months after surgery. RESULTS We assessed the ophthalmic arteries of 11 patients via color Doppler flow imaging. Before undergoing carotid endarterectomy, five patients showed reversed ophthalmic artery flow. In the other six patients who experienced antegrade ophthalmic artery flow, the average peak systolic flow velocity was 0.09 +/- 0.05 m/s (mean +/- standard deviation). Preoperative reversed flow resolved in each patient 1 week after undergoing surgery. All patients showed antegrade ophthalmic artery flow. The average peak systolic flow velocity in the patients who had preoperative antegrade flow rose significantly, to 0.21 +/- 0.14 m/s (P < 0.05). There was no significant change as compared with findings at 1 week after surgery. During the follow-up period (mean, 32.4 mo), no patients complained of recurrent visual symptoms. At the end of the study period, visual acuity had improved in five patients and had not worsened in the other six patients. CONCLUSION Carotid endarterectomy was effective for improving or preventing the progress of chronic ocular ischemia caused by internal carotid artery stenosis.
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Affiliation(s)
- S Kawaguchi
- Department of Neurosurgery, Nara Medical University, Japan.
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Nishikawa N, Izumi M, Yokoi M, Miyazawa H, Hanaoka F. E2F regulates growth-dependent transcription of genes encoding both catalytic and regulatory subunits of mouse primase. Genes Cells 2001; 6:57-70. [PMID: 11168597 DOI: 10.1046/j.1365-2443.2001.00395.x] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
DNA polymerase alpha-primase is one of the principal enzymes involved in eukaryotic chromosomal DNA replication. Mouse DNA polymerase alpha-primase consists of four subunits with molecular masses of 180, 68, 54 and 46 kDa. Protein and mRNA expression levels of the four subunits are up-regulated in a coordinated manner in response to growth stimulation. We have previously analysed the transcription of the 180 kDa (p180) and 68 kDa (p68) subunits, which form the DNA polymerase catalytic complex, and found that growth-dependent regulation of transcription of the mouse p180 and p68 genes is mediated by a common factor, E2F, while the basal transcription of the genes is regulated by different transcription factors. We characterized the transcriptional regulation of the 54 kDa (p54) and 46 kDa (p46) subunits, which form the DNA primase catalytic complex. We isolated genomic clones spanning the 5'-flanking regions of the p54 and p46 genes and showed, using transient expression and gel mobility shift assays, that the basal transcription of p54 is controlled by Sp1 and GA-binding protein, as is the basal transcription of the p180 gene. The basal transcription of p46 is controlled by unknown factor(s) which were bound to the upstream sequence. The variant E2F sites close to the transcription initiation sites of the p54 and p46 genes had no basal promoter activity, but were essential for the growth-dependent transcription of both genes. The promoter regions of the four subunits of mouse DNA polymerase d-primase complex share several common features. The coordinated transcription of all four subunits in response to growth stimulation appears to be controlled by E2F.
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Affiliation(s)
- N Nishikawa
- Cellular Physiology Laboratory, RIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198, Japan
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Ohta M, Nishikawa N, Kida H, Miyao S. [Anesthetic management of two patients with polymyositis]. Masui 2000; 49:1371-3. [PMID: 11193514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
We report anesthetic experience of two patients suffering from polymyositis. The first case is a 56 year old woman who underwent tympanoplasty for cholesteatoma of the middle ear. Anesthesia was induced with thiopental and deepened with oxygen-nitrous oxide and sevoflurane. No muscle relaxant was used for endotracheal intubation and for maintaining anesthesia. Another is a 61 year old man who underwent open reduction and internal fixation for condyle fracture of the tibia. Epidural catheter was inserted at L 3-L 4. Epidural blockade was established with 2% mepivacaine, and sedation was achieved by intravenous midazolam. Concerning the anesthetic management of a patient with polymyositis, there are some informations on the appropriate use of muscle relaxants. It is generally believed that the patient is sensitive to nondepolarizing muscle relaxants and the use of antagonist drug (reversal) may cause muscle weakness, severe dysrhythmia, et al. Therefore we think it is appropriate to manage such a patient without muscle relaxants.
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Affiliation(s)
- M Ohta
- Department of Anesthesia, Suita Municipal Hospital, Suita 564-0082
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Masuyama T, Yamamoto K, Sakata Y, Doi R, Nishikawa N, Kondo H, Ono K, Kuzuya T, Sugawara M, Hori M. Evolving changes in Doppler mitral flow velocity pattern in rats with hypertensive hypertrophy. J Am Coll Cardiol 2000; 36:2333-8. [PMID: 11127481 DOI: 10.1016/s0735-1097(00)01000-7] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.9] [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: 11/26/2022]
Abstract
OBJECTIVES The aim of our study was to explore evolving changes in a mitral flow velocity pattern (MFVP) and its hemodynamic and pathological correlates in hypertensive rats in an isolated diastolic heart failure model. BACKGROUND Development of left ventricular (LV) hypertrophy and concomitant diastolic dysfunction cause heart failure in hypertensive hearts even with normal systolic function; however, associated evolving change in MFVP is still unclear. METHODS Mitral flow velocity pattern was recorded every 2 weeks from 7 to 19 weeks in six hypertensive rats. Hemodynamic and pathological correlates of Doppler mitral flow indexes were examined as an additional part of the study using the hypertensive rats at the age of 13 weeks (compensatory stage, n = 7) and at 19 weeks (heart failure stage, n = 8). RESULTS Initial development of pressure overload LV hypertrophy resulted in a decrease in early diastolic filling wave (E), a reciprocal increase in the filling wave due to atrial contraction (A) and prolongation of deceleration time of E wave (relaxation abnormality pattern). These changes were associated with an increase in tau, an index of LV relaxation, but without a change in LV end-diastolic pressure. Transition to congestive heart failure caused an increase in E, a decrease in A and shortening of deceleration time. These changes were not associated with further increase in tau but with elevation of LV end-diastolic pressure, reflecting marked LV hypertrophy and myocardial fibrosis. CONCLUSIONS Development of pressure overload LV hypertrophy is associated with evolving changes in MFVP from normal to relaxation abnormality pattern and, in turn, to pseudonormalized to restrictive pattern. Analysis of MFVP may be useful to follow not only functional but also constitutional changes of the myocardium in hypertensive hearts.
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Affiliation(s)
- T Masuyama
- Department of Internal Medicine and Therapeutics, Osaka University Graduate School of Medicine, Suita, Japan.
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Sakata Y, Masuyama T, Yamamoto K, Nishikawa N, Yamamoto H, Kondo H, Ono K, Otsu K, Kuzuya T, Miwa T, Takeda H, Miyamoto E, Hori M. Calcineurin inhibitor attenuates left ventricular hypertrophy, leading to prevention of heart failure in hypertensive rats. Circulation 2000; 102:2269-75. [PMID: 11056104 DOI: 10.1161/01.cir.102.18.2269] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.4] [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: 11/16/2022]
Abstract
BACKGROUND There is controversy regarding the contribution of calcineurin activation to the development of pressure-overload left ventricular (LV) hypertrophy and heart failure. The aim of this study was to explore whether the inhibition of calcineurin may prevent the transition to heart failure in hypertensive rats and, if so, to clarify in which developmental stage of LV hypertrophy calcineurin plays a key role. METHODS AND RESULTS Dahl salt-sensitive rats placed on an 8% NaCl diet from the age of 7 weeks (hypertensive rats) were randomized to no treatment (n=6) or treatment with the calcineurin inhibitor FK506 (1 mg x kg(-1) x d(-1)) from 8 weeks (FKE, n=7) or from 17 weeks (FKL, n=7). Rats placed on a 0.3% NaCl diet were defined as control rats (n=6). The administration of FK506 from 8 weeks attenuated, although it did not block, LV hypertrophy observed in the untreated rats and prevented the transition to heart failure. The development of LV fibrosis, however, was not attenuated by the administration of FK506 from 8 weeks. The administration of FK506 from 17 weeks brought no benefit for cardiac remodeling or LV function and failed to prevent heart failure. CONCLUSIONS Calcineurin inhibition, if started from the initial stage of pressure overload, attenuated the development of LV hypertrophy without any effect on LV fibrosis and prevented the transition to heart failure. The activation of calcineurin is involved in the development of LV hypertrophy but not of LV fibrosis, and this involvement may be crucial at the initial stage.
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Affiliation(s)
- Y Sakata
- Department of Internal Medicine and Therapeutics, Osaka University Graduate School of Medicine, Yamadaoka, Suita 565-0871, Japan
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Yamamoto K, Masuyama T, Sakata Y, Mano T, Nishikawa N, Kondo H, Akehi N, Kuzuya T, Miwa T, Hori M. Roles of renin-angiotensin and endothelin systems in development of diastolic heart failure in hypertensive hearts. Cardiovasc Res 2000; 47:274-83. [PMID: 10946064 DOI: 10.1016/s0008-6363(00)00101-2] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.7] [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: 11/17/2022] Open
Abstract
OBJECTIVE Although interest in diastolic heart failure is growing because of its clinical frequency, little is known about this type of heart failure. Our laboratory recently developed a diastolic heart failure model using Dahl salt-sensitive rat. In this model, gene expression of angiotensin-converting enzyme and endothelin (ET) system in the left ventricle was enhanced at heart failure stage without downregulation of angiotensin type 1a receptor mRNA level. However, the roles of these humoral systems in the transition to diastolic failure remain unclear. METHODS Subdepressor doses of angiotensin II type 1 (AT1) receptor and ET type A (ETA) receptor antagonists were administered in this model just after onset of hypertension, and their effects were investigated. RESULTS Neither AT1 nor ETA receptor blockade inhibited the early (13 weeks) compensatory left ventricular (LV) hypertrophy. This form of compensatory hypertrophy is associated with subnormal LV end-systolic stress, which was normalized by AT1 receptor blockade but not by ETA receptor blockade. Progression of LV hypertrophy and fibrosis and transition to heart failure (19 weeks) in the untreated rats were prevented by both antagonists, resulting in normalization of LV end-diastolic pressure and lung weight. AT1 receptor blockade, but not ETA receptor blockade, normalized time constant of LV relaxation. Enhanced gene expression for ET system in the left ventricle observed in the untreated rats was suppressed with AT1 receptor antagonist administration. ETA receptor blockade slightly but significantly elevated the AT1a receptor mRNA level as compared with the untreated rats. CONCLUSIONS RAS and ET system contribute to the transition to diastolic heart failure through the development of excessive hypertrophy and ventricular fibrosis in hypertensive heart diseases, however, neither RAS nor ET system is mandatory for normal compensation for pressure overload. RAS apparently causes such diastolic effects at least partly through the ET system.
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MESH Headings
- Angiotensin Receptor Antagonists
- Animals
- Aspartic Acid Endopeptidases/genetics
- Benzimidazoles/therapeutic use
- Biphenyl Compounds/therapeutic use
- Diastole
- Dose-Response Relationship, Drug
- Endothelin Receptor Antagonists
- Endothelin-1
- Endothelin-Converting Enzymes
- Endothelins/genetics
- Heart Failure/etiology
- Heart Failure/physiopathology
- Heart Failure/prevention & control
- Heart Ventricles/drug effects
- Heart Ventricles/metabolism
- Hypertension/complications
- Hypertension/drug therapy
- Hypertension/physiopathology
- Male
- Metalloendopeptidases
- Peptidyl-Dipeptidase A/genetics
- Protein Precursors/genetics
- Pyrimidines/therapeutic use
- RNA, Messenger/analysis
- Rats
- Rats, Inbred Dahl
- Receptor, Angiotensin, Type 1
- Receptor, Angiotensin, Type 2
- Receptor, Endothelin A
- Receptors, Angiotensin/genetics
- Receptors, Endothelin/genetics
- Sulfonamides/therapeutic use
- Tetrazoles
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Affiliation(s)
- K Yamamoto
- Department of Internal Medicine and Therapeutics (First Department of Medicine), Osaka University Graduate School of Medicine, Yamadaoka, Suita, Japan
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Kida H, Nishikawa N, Matsunami K, Kawahito M, Ota M, Miyao S. [Sitting position in the neurosurgery: the results of a questionnaire sent to neurosurgeons of medical colleges]. Masui 2000; 49:566-9. [PMID: 10846394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
We analyzed questionnaire on the sitting position among neurosurgeons. We sent questionnaire to 80 medical colleges in Japan and obtained response from 61 universities (76.3%). The sitting position surgery was performed in 7 institutions (11.5%) and was not in other 54 (88.5%). The first reason for not adopting the sitting position was "other position was good enough to perform the surgery" (44 institutions, 81%). This reason exceeded "objection from the anesthesiologist" (17 institutions, 31%). Twenty institutions (33%) adopted or wished to perform the surgery in sitting position, indicating that neurosurgeons still are interest in performing the sitting position surgery. But 6 institutions adopting the sitting position predicted that the sitting position would diminish in the future, and the sitting position surgery would decrease in number in Japan.
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Affiliation(s)
- H Kida
- Department of Anesthesia, Suita Municipal Hospital
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