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Yamagishi H, Sekiguchi N, Hirano A, Oshima A, Imai T. Metformin-associated Lactic Acidosis Induced by Excessive Alcohol Consumption. Intern Med 2023:2707-23. [PMID: 37952952 DOI: 10.2169/internalmedicine.2707-23] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2023] Open
Abstract
A 65-year-old man with type 2 diabetes who was being treated with metformin developed lactic acidosis following excessive alcohol consumption. While an impaired renal function is a major risk factor for metformin-associated lactic acidosis (MALA), the patient's basal renal function was normal. Alcohol misuse reduces lactate clearance by utilizing nicotinamide adenine dinucleotides for ethanol oxidation, thereby promoting vulnerability to MALA. Nevertheless, as MALA in individuals with a normal renal function is extremely rare, the clinical picture of alcohol-induced MALA is unclear. We delineate the clinical picture and discuss the pathogenesis of alcohol-induced MALA based on our experience and previous case reports.
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Affiliation(s)
- Hirofumi Yamagishi
- Department of Endocrinology and Metabolism, JA Toride General Medical Center, Japan
| | - Naoki Sekiguchi
- Department of Endocrinology and Metabolism, JA Toride General Medical Center, Japan
| | - Akiko Hirano
- Department of Endocrinology and Metabolism, JA Toride General Medical Center, Japan
| | - Atsushi Oshima
- Department of Endocrinology and Metabolism, JA Toride General Medical Center, Japan
| | - Taihei Imai
- Department of Endocrinology and Metabolism, JA Toride General Medical Center, Japan
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2
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Sekiguchi H, Kikuchi N, Ishida I, Sekiguchi N, Nishimura K, Shiga T, Kawana M, Hagiwara N, Takemura Y, Yamaguchi J. Direct Link Between Cardiac Failure and Global Cerebral Atrophy in a Young Adult: A Case Report on Reduced Cerebral Artery Blood Flow. Am J Case Rep 2023; 24:e940892. [PMID: 37943737 PMCID: PMC10643886 DOI: 10.12659/ajcr.940892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 09/28/2023] [Accepted: 09/30/2023] [Indexed: 11/12/2023]
Abstract
BACKGROUND Heart failure is associated with structural brain abnormalities, including atrophy of multiple brain regions. Previous studies have reported brain atrophy in middle-aged patients with systolic heart failure. In this report, we present the case of a 21-year-old woman with idiopathic dilated cardiomyopathy, cardiac failure, and global cerebral atrophy due to reduced cerebral artery blood flow. We also discuss the impact of brain atrophy in this young adult patient with severe heart failure and no risk factors for atherosclerosis. CASE REPORT A 21-year-old woman with dyspnea and leg edema was admitted to our hospital. After several examinations, an endomyocardial biopsy led to a diagnosis of idiopathic dilated cardiomyopathy, and transthoracic ultrasound cardiography revealed that her left ventricular ejection fraction was 36%. One year after the first hospitalization, her heart failure was classified as New York Heart Association Class III. Magnetic resonance imaging showed severe global brain atrophy, and single-photon emission computed tomography combined with brain computed tomography showed reduced blood flow to the entire brain. She had no risk factors for atherosclerosis and no atherosclerotic changes to her brain or carotid arteries, but her neuropsychological and neurological findings indicated more pronounced brain and cognitive dysfunction. CONCLUSIONS This young adult patient with idiopathic dilated cardiomyopathy, cardiac failure, and global cerebral atrophy showed reduced cerebral artery blood flow and cognitive impairment. The findings of this report indicate that low cardiac output may directly cause brain atrophy in patients with systolic heart failure.
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Affiliation(s)
- Haruki Sekiguchi
- Department of Cardiology, Tokyo Women’s Medical University, Tokyo, Japan
- Department of General Medicine, Tokyo Women’s Medical University, Tokyo, Japan
- Department of Comprehensive Sleep Medicine, Tokyo Women’s Medical University, Tokyo, Japan
- National Hospital Organization Yokohama Medical Center, Yokohama, Kanagawa, Japan
- National Hospital Organization Kyoto Medical Center, Kyoto, Japan
| | - Noriko Kikuchi
- Department of Cardiology, Tokyo Women’s Medical University, Tokyo, Japan
| | - Issei Ishida
- Department of Cardiology, Tokyo Women’s Medical University, Tokyo, Japan
| | - Naoki Sekiguchi
- Department of Psychiatry, Tokyo Women’s Medical University, Tokyo, Japan
- Cosmetic Dermatology, UB CLINIC Shinjyuku, Tokyo, Japan
| | - Katsuji Nishimura
- Department of Psychiatry, Tokyo Women’s Medical University, Tokyo, Japan
| | - Tsuyoshi Shiga
- Department of Cardiology, Tokyo Women’s Medical University, Tokyo, Japan
- Department of Clinical Pharmacology and Therapeutics, The Jikei University School of Medicine, Tokyo, Japan
| | - Masatoshi Kawana
- Department of Cardiology, Tokyo Women’s Medical University, Tokyo, Japan
- Department of General Medicine, Tokyo Women’s Medical University, Tokyo, Japan
| | - Nobuhisa Hagiwara
- Department of Cardiology, Tokyo Women’s Medical University, Tokyo, Japan
| | - Yousuke Takemura
- Department of General Medicine, Tokyo Women’s Medical University, Tokyo, Japan
| | - Junichi Yamaguchi
- Department of Cardiology, Tokyo Women’s Medical University, Tokyo, Japan
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3
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Sekiguchi N, Shiozawa N, Ishikawa C, Kitagawa M, Nakayama T, Ito D. Myxoid meningioma in a dog. J Small Anim Pract 2023; 64:118. [PMID: 36428278 DOI: 10.1111/jsap.13576] [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] [Received: 04/14/2022] [Revised: 08/25/2022] [Accepted: 10/13/2022] [Indexed: 11/27/2022]
Affiliation(s)
- N Sekiguchi
- Laboratory of Veterinary Neurology and Neurosurgery, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - N Shiozawa
- Laboratory of Veterinary Neurology and Neurosurgery, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - C Ishikawa
- Laboratory of Veterinary Neurology and Neurosurgery, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - M Kitagawa
- Laboratory of Veterinary Neurology and Neurosurgery, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - T Nakayama
- Laboratory of Veterinary Radiology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - D Ito
- Laboratory of Veterinary Neurology and Neurosurgery, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan.,Laboratory of Veterinary Radiology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
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4
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Ito D, Ishikawa C, Sekiguchi N, Kitagawa M. Syringomyelia fluid flow on time-spatial labeling inversion pulse (Time-SLIP) images in a dog. J Small Anim Pract 2022; 63:911. [PMID: 36096494 DOI: 10.1111/jsap.13551] [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] [Received: 05/27/2021] [Revised: 07/11/2022] [Accepted: 08/12/2022] [Indexed: 11/27/2022]
Affiliation(s)
- D Ito
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - C Ishikawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - N Sekiguchi
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - M Kitagawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
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5
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Sekiguchi N, Ito D, Ishikawa C, Tanaka N, Kitagawa M. Heavily T2-weighted imaging findings of spinal cord swelling in dogs with intervertebral disc extrusion. J S Afr Vet Assoc 2022. [DOI: 10.36303/jsava.2022.93.1.500] [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: 02/09/2023] Open
Affiliation(s)
- N Sekiguchi
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University,
Japan
| | - D Ito
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University,
Japan
| | - C Ishikawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University,
Japan
| | - N Tanaka
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University,
Japan
| | - M Kitagawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University,
Japan
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Sekiguchi N, Ito D, Ishikawa C, Tanaka N, Kitagawa M. Heavily T2-weighted imaging findings of spinal cord swelling in dogs with intervertebral disc extrusion. J S Afr Vet Assoc 2022; 93:16-24. [PMID: 35950805] [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: 06/15/2023] Open
Abstract
This study investigated causes of attenuation of cerebrospinal fluid (CSF) signal on heavily T2-weighted (T2W) images in dogs with thoracolumbar disc extrusion. Medical records and magnetic resonance images were retrospectively reviewed. Dogs were classified into the following grades; grade 1, non-ambulatory paraparesis; grade 2, paraplegia with deep pain perception and grade 3, paraplegia without deep pain perception. The length of intramedullary T2W hyperintensity of the spinal cord, cranial/ caudal expansion of extradural compressive materials (ECM), and the CSF signal attenuation were measured. Ratios to the second lumbar vertebra (L2) were calculated for the length of intramedullary T2W hyperintensity (T2W:L2), cranial/caudal expansion of ECM (ECML:L2), and CSF signal attenuation (CSF:L2). The dogs were classified into focal or extended T2W hyperintensity groups according to the length [focal, shorter than length of L2; extended, longer than L2]. The area of EMC and the spinal canal were measured on transverse images at the lesion deriving occupancy ratio. The correlation between CSF:L2 and other data were analysed, and CSF:L2 was compared between the grades. In dogs with intramedullary T2W hyperintensity, the locations of CSF attenuation and the hyperintensity were compared if those locations were matched. Fifty-five dogs were included, 36 of which showed intramedullary T2W hyperintensity. Twenty-two of 36 dogs were considered as match of the location of the CSF attenuation and hyperintensity. CSF:L2 was significantly correlated with T2W:L2 in dogs with extended T2W hyperintensity (p = 0.0002), while CSF:L2 was significantly correlated with ECML:L2 in dogs with focal or no T2W hyperintensity (p = 0.0103 and p = 0.0364, respectively). CSF:L2 in grade 3 was significantly greater than those in patients who were grade 1 or 2 (both p < 0.001). In conclusion, higher CSF:L2, which was frequently seen in grade 3, would be most consistent with a higher T2W:L2 which might indicate spinal cord swelling.
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Affiliation(s)
- N Sekiguchi
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Japan
| | - D Ito
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Japan
| | - C Ishikawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Japan
| | - N Tanaka
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Japan
| | - M Kitagawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Japan
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7
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Daitoku H, Someya M, Kako K, Hayashi T, Tajima T, Haruki H, Sekiguchi N, Uetake T, Akimoto Y, Fukamizu A. siRNA screening identifies METTL9 as a histidine Nπ-methyltransferase that targets the proinflammatory protein S100A9. J Biol Chem 2021; 297:101230. [PMID: 34562450 PMCID: PMC8571522 DOI: 10.1016/j.jbc.2021.101230] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 09/16/2021] [Accepted: 09/16/2021] [Indexed: 11/18/2022] Open
Abstract
Protein methylation is one of the most common post-translational modifications observed in basic amino acid residues, including lysine, arginine, and histidine. Histidine methylation occurs on the distal or proximal nitrogen atom of its imidazole ring, producing two isomers: Nτ-methylhistidine or Nπ-methylhistidine. However, the biological significance of protein histidine methylation remains largely unclear owing in part to the very limited knowledge about its contributing enzymes. Here, we identified mammalian seven-β-strand methyltransferase METTL9 as a histidine Nπ-methyltransferase by siRNA screening coupled with methylhistidine analysis using LC–tandem MS. We demonstrated that METTL9 catalyzes Nπ-methylhistidine formation in the proinflammatory protein S100A9, but not that of myosin light chain kinase MYLK2, in vivo and in vitro. METTL9 does not affect the heterodimer formation of S100A9 and S100A8, although Nπ-methylation of S100A9 at His-107 overlaps with a zinc-binding site, attenuating its affinity for zinc. Given that S100A9 exerts an antimicrobial activity, probably by chelation of zinc essential for the growth of bacteria and fungi, METTL9-mediated S100A9 methylation might be involved in the innate immune response to bacterial and fungal infection. Thus, our findings suggest a functional consequence for protein histidine Nπ-methylation and may add a new layer of complexity to the regulatory mechanisms of post-translational methylation.
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Affiliation(s)
- Hiroaki Daitoku
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance, University of Tsukuba, Tsukuba, Ibaraki, Japan.
| | - Momoka Someya
- Master's Program in Agro-Bioresources Science and Technology, Degree Programs in Life and Earth Sciences, Graduate School of Sciences and Technology, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Koichiro Kako
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Takahiro Hayashi
- Doctoral Program in Life and Agricultural Sciences, Degree Programs in Life and Earth Sciences, Graduate School of Sciences and Technology, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Tatsuya Tajima
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Hikari Haruki
- Master's Program in Agro-Bioresources Science and Technology, Degree Programs in Life and Earth Sciences, Graduate School of Sciences and Technology, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Naoki Sekiguchi
- College of Agro-Biological Resource Sciences, School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Toru Uetake
- Master's Program in Agro-Bioresources Science and Technology, Degree Programs in Life and Earth Sciences, Graduate School of Sciences and Technology, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yuto Akimoto
- College of Agro-Biological Resource Sciences, School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Akiyoshi Fukamizu
- Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance, University of Tsukuba, Tsukuba, Ibaraki, Japan; The World Premier International Research Center Initiative (WPI), International Institute for Integrative Sleep Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan; AMED-CREST, Japan Agency for Medical Research and Development, Chiyoda-ku, Tokyo, Japan.
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8
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Zinzani PL, Raut M, Saretsky T, Ramchandren R, Santoro A, Paszkiewicz‐Kozik E, Gasiorowski R, Johnson NA, Oliveira JSR, Buccheri V, Perini GF, Dickinson M, McDonald A, Ozcan M, Sekiguchi N, Giezek H, Nahar A, Kuruvilla J. HEALTH‐RELATED QUALITY OF LIFE AMONG PATIENTS WITH RELAPSED/REFRACTORY CLASSICAL HODGKIN LYMPHOMA (R/R CHL) IN A PHASE 3 STUDY OF PEMBROLIZUMAB VERSUS BRENTUXIMAB VEDOTIN. Hematol Oncol 2021. [DOI: 10.1002/hon.105_2880] [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: 11/11/2022]
Affiliation(s)
- P. L. Zinzani
- IRCCS Azienda Ospedaliero–Universitaria di Bologna Istituto di Ematologia “Seràgnoli” Dipartimento di Medicina Specialistica Diagnostica e Sperimentale Università di Bologna Specialized, Diagnostic and Experimental Medicine Bologna Italy
| | - M. Raut
- Merck & Co., Inc. Department of Medical Oncology Kenilworth New Jersey USA
| | - T. Saretsky
- Merck & Co., Inc. Department of Medical Oncology Kenilworth New Jersey USA
| | - R. Ramchandren
- University of Tennessee Department of Mediciine Knoxville Tennessee USA
| | - A. Santoro
- Humanitas University and IRCCS Humanitas Research Center Department of Oncology Milan Italy
| | - E. Paszkiewicz‐Kozik
- Maria Sklodowska–Curie National Institute of Oncology Department of Medical Oncology Warsaw Poland
| | - R. Gasiorowski
- Concord Hospital, University of Sydney Department of Hematology Sydney Australia
| | - N. A. Johnson
- Jewish General Hospital Department of Hematology Montreal Canada
| | - J. S. R. Oliveira
- Casa de Saúde Santa Marcelina Department of Medical Oncology São Paulo Brazil
| | - V. Buccheri
- Hospital das Clinicas da Faculdade de Medicina da Universidade de São Paulo Department of Clinical Medicine São Paulo Brazil
| | - G. F. Perini
- Hospital Israelita Albert Einstein Department of Hematology São Paulo Brazil
| | - M. Dickinson
- Peter MacCallum Cancer Centre and Royal Melbourne Hospital Department of Lymphoma Disease Melbourne Australia
| | - A. McDonald
- Pretoria East Hospital Department of Hematology Pretoria South Africa
| | - M. Ozcan
- Ankara University School of Medicine Department of Internal Medicine Ankara Turkey
| | - N. Sekiguchi
- National Hospital Organization Disaster Medical Center Department of Medical Oncology Tokyo Japan
| | - H. Giezek
- Merck & Co., Inc. Department of Medical Oncology Kenilworth New Jersey USA
| | - A. Nahar
- Merck & Co., Inc. Department of Medical Oncology Kenilworth New Jersey USA
| | - J. Kuruvilla
- Princess Margaret Cancer Centre Department of Medical Oncology and Hematology Toronto Canada
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9
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Ito D, Shiozawa N, Sekiguchi N, Ishikawa C, Jeffery ND. Simple ectopic left kidney in the pelvic cavity in a cat. J Small Anim Pract 2021; 62:930. [PMID: 33997982 DOI: 10.1111/jsap.13357] [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] [Received: 03/18/2021] [Revised: 04/20/2021] [Accepted: 04/29/2021] [Indexed: 11/28/2022]
Affiliation(s)
- D Ito
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - N Shiozawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - N Sekiguchi
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - C Ishikawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - N D Jeffery
- Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX, 77843, USA
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Ito D, Ishikawa C, Sekiguchi N, Jeffery ND, Kitagawa M. Utility of "MR myelography" in diagnosis of a presumed spinal subarachnoid diverticulum. J Small Anim Pract 2020; 61:782. [PMID: 33045762 DOI: 10.1111/jsap.13208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 06/26/2020] [Accepted: 07/01/2020] [Indexed: 12/01/2022]
Affiliation(s)
- D Ito
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - C Ishikawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - N Sekiguchi
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
| | - N D Jeffery
- Department of Small Animal Clinical Sciences, Texas A&M University, College Station, TX, 77843, USA
| | - M Kitagawa
- Laboratory of Veterinary Neurology, School of Veterinary Medicine, Nihon University, Fujisawa, Kanagawa, 252-0880, Japan
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Ito D, Shiozawa N, Sekiguchi N, Ishikawa C, Jeffery ND, Kitagawa M. Repeated surgical treatment and long-term outcome of a cat with vertebral vascular hamartoma. J Vet Med Sci 2020; 82:721-725. [PMID: 32295994 PMCID: PMC7324809 DOI: 10.1292/jvms.19-0079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A 30-month-old Maine Coon presented with progressive proprioceptive ataxia, paraparesis,
thoracolumbar pain, and decreased appetite. An extradural mass was detected within the
left side of the 13th thoracic vertebral canal that compressed the spinal cord on magnetic
resonance (MR) and was considered to be mineralized on computed tomography (CT) images.
The resected mass was diagnosed as a vertebral vascular hamartoma. Clinical signs
improved, but recurrence was diagnosed by MR and CT imaging at 7 months after surgery.
Repeated excisional surgery yielded the same diagnosis and the clinical signs abated.
Fifteen months after the second surgery, there was apparent vertebral deformation, but
there was no further change on CT images by 29 months.
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Affiliation(s)
- Daisuke Ito
- School of Veterinary Medicine, Nihon University, Kameino 1866, Fujisawa, Kanagawa 252-0880, Japan
| | - Naoko Shiozawa
- School of Veterinary Medicine, Nihon University, Kameino 1866, Fujisawa, Kanagawa 252-0880, Japan
| | - Naoki Sekiguchi
- School of Veterinary Medicine, Nihon University, Kameino 1866, Fujisawa, Kanagawa 252-0880, Japan
| | - Chieko Ishikawa
- School of Veterinary Medicine, Nihon University, Kameino 1866, Fujisawa, Kanagawa 252-0880, Japan
| | - Nick D Jeffery
- Department of Small Animal Clinical Sciences, Texas A&M University, TX77843, USA
| | - Masato Kitagawa
- School of Veterinary Medicine, Nihon University, Kameino 1866, Fujisawa, Kanagawa 252-0880, Japan
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Usuki K, Ueda Y, Fujita J, Matsumura I, Aotsuka N, Sekiguchi N, Nakazato T, Iwasaki H, Watanabe A, Sugimoto S, Koga-Yamakawa E, Naoe T, Kizaki M, Heike Y, Miyazaki Y, Akashi K. PS1344 PHASE 1/2 STUDY OF DSP-7888 IN PATIENTS WITH HIGHER-RISK (HR) MYELODYSPLASTIC SYNDROMES (MDS) AFTER FAILURE OF AZACITIDINE (AZA) THERAPY. Hemasphere 2019. [DOI: 10.1097/01.hs9.0000563656.45660.98] [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: 11/25/2022] Open
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Yamaguchi M, Suzuki R, Oguchi M, Miyazaki K, Taguchi S, Amaki J, Maeda T, Kubota N, Maruyama D, Terui Y, Sekiguchi N, Takizawa J, Tsukamoto H, Murayama T, Ando T, Matsuoka H, Hasegawa M, Wada H, Sakai R, Kameoka Y, Tsukamoto N, Choi I, Masaki Y, Shimada K, Fukuhara N, Utsumi T, Uoshima N, Kagami Y, Asano N, Katayama N. CLINICAL OUTCOMES AND DIAGNOSIS-TO-TREATMENT INTERVAL IN PATIENTS WITH NK/T-CELL LYMPHOMA: 7-YEAR FOLLOW-UP OF THE NKEA STUDY. Hematol Oncol 2019. [DOI: 10.1002/hon.86_2630] [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: 11/09/2022]
Affiliation(s)
- M. Yamaguchi
- Department of Hematology and Oncology; Mie University Graduate School of Medicine; Tsu Japan
| | - R. Suzuki
- Oncology and Hematology; Shimane University Hospital; Izumo Japan
| | - M. Oguchi
- Radiation Oncology; Cancer Institute Hospital of Japanese Foundation for Cancer Research; Tokyo Japan
| | - K. Miyazaki
- Department of Hematology and Oncology; Mie University Graduate School of Medicine; Tsu Japan
| | - S. Taguchi
- Radiation Oncology; Cancer Institute Hospital of Japanese Foundation for Cancer Research; Tokyo Japan
| | - J. Amaki
- Hematology and Oncology; Tokai University School of Medicine; Kanagawa Japan
| | - T. Maeda
- Hematology; Kurashiki Central Hospital; Kurashiki Japan
| | - N. Kubota
- Hematology; Saitama Cancer Center; Ina Japan
| | - D. Maruyama
- Hematology; National Cancer Center Hospital; Tokyo Japan
| | - Y. Terui
- Hematology Oncology; Cancer Institute Hospital of Japanese Foundation for Cancer Research; Tokyo Japan
| | - N. Sekiguchi
- Comprehensive Cancer Therapy; Shinshu University School of Medicine; Matsumoto Japan
| | - J. Takizawa
- Hematology; Endocrinology and Metabolism, Niigata University Faculty of Medicine; Niigata Japan
| | - H. Tsukamoto
- Hematology; Showa University School of Medicine; Tokyo Japan
| | - T. Murayama
- Hematology; Hyogo Cancer Center; Akashi Japan
| | - T. Ando
- Hematology; Respiratory Medicine and Oncology, Saga University; Saga Japan
| | - H. Matsuoka
- Medical Oncology/Hematology; Kobe University; Kobe Japan
| | - M. Hasegawa
- Radiation Oncology; Nara Medical University; Kashihara Japan
| | - H. Wada
- Hematology; Kawasaki Medical School; Kurashiki Japan
| | - R. Sakai
- Medical Oncology; Kanagawa Cancer Center; Yokohama Japan
| | - Y. Kameoka
- Hematology; Nephrology and Rheumatology, Akita University; Akita Japan
| | - N. Tsukamoto
- Oncology Center; Gunma University Hospital; Maebashi Japan
| | - I. Choi
- Hematology; National Hospital Organization Kyushu Cancer Center; Fukuoka Japan
| | - Y. Masaki
- Hematology and Immunology; Kanazawa Medical University; Kanazawa Japan
| | - K. Shimada
- Hematology and Oncology; Nagoya University School of Medicine; Nagoya Japan
| | - N. Fukuhara
- Hematology & Rheumatology; Tohoku University School of Medicine; Sendai Japan
| | - T. Utsumi
- Hematology; Shiga Medical Center for Adults; Moriyama Japan
| | - N. Uoshima
- Hematology; Japanese Red Cross Kyoto Daini Hospital; Kyoto Japan
| | - Y. Kagami
- Hematology; Toyota Kosei Hospital; Toyota Japan
| | - N. Asano
- Molecular Diagnostics; Shinshu Medical Center; Suzaka Japan
| | - N. Katayama
- Department of Hematology and Oncology; Mie University Graduate School of Medicine; Tsu Japan
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14
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Takeuchi N, Koike K, Yoshida S, Sekiguchi N, Noguchi T. Impaired quality of life of caregivers of patients with gastrointestinal cancer undergoing palliative chemotherapy. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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15
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Kawamoto T, Sekiguchi H, Suzuki A, Suzuki T, Sekiguchi N, Fukushima K, Nagao M, Nishimura K, Shiga T, Hagiwara N. The Impact of Brain Atrophy in the Patient with Young Patients with Severe Heart Failure. J Card Fail 2017. [DOI: 10.1016/j.cardfail.2017.08.080] [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: 11/16/2022]
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16
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Kanai M, Sekiguchi N. Olfactory dysfunction in Parkinson's disease. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1014] [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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17
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Kurimoto M, Sekiguchi N, Kurihara Y, Ito K, Takezako N. Significance of Measurement of Serum Wilm’s Tumor 1 (WT1) Gene Level in Myelodysplastic Syndrome (MDS). Leuk Res 2017. [DOI: 10.1016/s0145-2126(17)30335-1] [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: 10/19/2022]
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18
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Asami M, Zhong L, Sekiguchi N, Yamada K, Hiwatashi Y, Taniguchi T, Hosoda N, Ito S. Optical Resolution of C2-Symmetric Racemic 1,4-Diols with o-Xylylene Structure by Chiral Resolving Agent ( S)-ALBO-V. BCSJ 2015. [DOI: 10.1246/bcsj.20150066] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Masatoshi Asami
- Department of Advanced Materials Chemistry, Graduate School of Engineering, Yokohama National University
| | - Lvling Zhong
- Department of Advanced Materials Chemistry, Graduate School of Engineering, Yokohama National University
| | - Naoki Sekiguchi
- Department of Advanced Materials Chemistry, Graduate School of Engineering, Yokohama National University
| | - Kumiko Yamada
- Department of Advanced Materials Chemistry, Graduate School of Engineering, Yokohama National University
| | - Yuya Hiwatashi
- Department of Advanced Materials Chemistry, Graduate School of Engineering, Yokohama National University
| | - Toshiro Taniguchi
- Department of Advanced Materials Chemistry, Graduate School of Engineering, Yokohama National University
| | - Naoya Hosoda
- Department of Advanced Materials Chemistry, Graduate School of Engineering, Yokohama National University
| | - Suguru Ito
- Department of Advanced Materials Chemistry, Graduate School of Engineering, Yokohama National University
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19
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Fukushima T, Gomi D, Kobayashi T, Sekiguchi N, Sakamoto A, Sasaki S, Koizumi T. Successful Salvage Chemotherapy with Amrubicin for Invasive Thymoma Associated with Myasthenia Gravis. Jpn J Clin Oncol 2014; 44:1120-1122. [DOI: 10.1093/jjco/hyu136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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20
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Sekiguchi H, Shimamoto K, Sekiguchi N, Ozaki Y, Shimizu K, Takahashi Y, Tatsumi F, Ishizuka N, Kawana M. WAIST CIRCUMFERENCE PREDICTS ABNORMAL LEFT VENTRICULAR RELAXATION IN MEN: DATA OBTAINED THROUGH THOROUGH PHYSICAL EXAMINATIONS IN HEALTHY SUBJECTS. J Am Coll Cardiol 2013. [DOI: 10.1016/s0735-1097(13)61346-7] [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: 11/16/2022]
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21
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Harada S, Sekiguchi N, Shimizu N. Amplification of a plasmid bearing a mammalian replication initiation region in chromosomal and extrachromosomal contexts. Nucleic Acids Res 2010; 39:958-69. [PMID: 20929873 PMCID: PMC3035466 DOI: 10.1093/nar/gkq882] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [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: 02/03/2023] Open
Abstract
Amplified genes in cancer cells reside on extrachromosomal double minutes (DMs) or chromosomal homogeneously staining regions (HSRs). We used a plasmid bearing a mammalian replication initiation region to model gene amplification. Recombination junctions in the amplified region were comprehensively identified and sequenced. The junctions consisted of truncated direct repeats (type 1) or inverted repeats (type 2) with or without spacing. All of these junctions were frequently detected in HSRs, whereas there were few type 1 or a unique type 2 flanked by a short inverted repeat in DMs. The junction sequences suggested a model in which the inverted repeats were generated by sister chromatid fusion. We were consistently able to detect anaphase chromatin bridges connected by the plasmid repeat, which were severed in the middle during mitosis. De novo HSR generation was observed in live cells, and each HSR was lengthened more rapidly than expected from the classical breakage/fusion/bridge model. Importantly, we found massive DNA synthesis at the broken anaphase bridge during the G1 to S phase, which could explain the rapid lengthening of the HSR. This mechanism may not operate in acentric DMs, where most of the junctions are eliminated and only those junctions produced through stable intermediates remain.
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Affiliation(s)
- Seiyu Harada
- Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima 739-8521, Japan
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22
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Taniguchi K, Katagiri K, Kashiwagi H, Harada S, Sugimoto Y, Shimizu Y, Arakawa H, Ito T, Yamazaki M, Watanabe T, Kato A, Hoshino E, Takahashi T, Esaki T, Suzuki M, Takeda S, Ichikawa F, Harada A, Sekiguchi N, Ishigai M, Kawata H, Yoneya T, Onuma E, Sudoh M, Aoki Y. A novel nonsecosteroidal VDR agonist (CH5036249) exhibits efficacy in a spontaneous benign prostatic hyperplasia beagle model. J Steroid Biochem Mol Biol 2010; 121:204-7. [PMID: 20304062 DOI: 10.1016/j.jsbmb.2010.03.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2009] [Revised: 03/09/2010] [Accepted: 03/11/2010] [Indexed: 11/17/2022]
Abstract
To date, there have been no reports showing the efficacy of nonsecosteroidal vitamin D receptor (VDR) agonists in a benign prostatic hyperplasia (BPH) animal model. To examine the efficacy of CH5036249, a novel nonsecosteroidal VDR agonist, we orally administered the compound at 0.03 microg/kg to a beagle model with spontaneous BPH. Prostate volume was checked by rectal ultrasonic probe periodically during 11 months of administration and the prostate tissues histologically examined. CH5036249 inhibited prostate growth in two out of three dogs compared with vehicle-treated dogs. In the prostate specimens, substantial atrophy of the epithelium was observed in all dogs administered CH5036249. At the dose given, serum calcium levels slightly increased in the CH5036249-treated dogs but stayed within a normal range. We next examined the cell growth inhibition of CH5036249 using human prostate stromal cells and found the cell growth inhibitory activity of CH5036249 to be comparable to that of 1alpha,25(OH)2D3. The bioavailability from oral administration in rats was 95.1% with a t1/2 of 17.6 h. Both micro-AMES and micronucleus tests were negative. Although the results are still preliminary, we consider the novel nonsecosteroidal VDR agonist CH5036249 to be a possible new drug candidate for the treatment of BPH in humans.
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Affiliation(s)
- K Taniguchi
- Research Division, Chugai Pharmaceutical Co., Ltd., Kamakura Research Labs., 200 Kajiwara, Kamakura, Kanagawa 247-8530, Japan.
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23
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Kaneko A, Kato M, Sekiguchi N, Mitsui T, Takeda K, Aso Y. In vitromodel for the prediction of clinical CYP3A4 induction using HepaRG cells. Xenobiotica 2009; 39:803-10. [DOI: 10.3109/00498250903184018] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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24
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Kaneko A, Kato M, Sekiguchi N, Mitsui T, Takeda K, Aso Y. In vitromodel for the prediction of clinical CYP3A4 induction using HepaRG cells. Xenobiotica 2009. [DOI: 10.1080/00498250903184018] [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: 10/20/2022]
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25
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Sekiguchi N, Kato M, Takada M, Watanabe H, Higashida A, Sakai S, Ishigai M, Aso Y. In vivoapproach for the evaluation of mechanism-based inhibition of cytochrome P450 3A in rats. Xenobiotica 2008; 38:368-81. [DOI: 10.1080/00498250701851891] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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26
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Sekiguchi N, Kawauchi S, Furuya T, Inaba N, Matsuda K, Ando S, Ogasawara M, Aburatani H, Kameda H, Amano K, Abe T, Ito S, Takeuchi T. Messenger ribonucleic acid expression profile in peripheral blood cells from RA patients following treatment with an anti-TNF-α monoclonal antibody, infliximab. Rheumatology (Oxford) 2008; 47:780-8. [DOI: 10.1093/rheumatology/ken083] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
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27
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Shimizu N, Hanada N, Utani K, Sekiguchi N. Interconversion of intra- and extra-chromosomal sites of gene amplification by modulation of gene expression and DNA methylation. J Cell Biochem 2008; 102:515-29. [PMID: 17390337 DOI: 10.1002/jcb.21313] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [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: 12/22/2022]
Abstract
We previously showed that plasmids containing a mammalian replication initiation region and a matrix attachment region were efficiently amplified to few thousand copies per cell, and that they formed extrachromosomal double minutes (DMs) or chromosomal homogeneously staining regions (HSRs). In these structures, the plasmid sequence was arranged as a tandem repeats, and we suggested a mechanism of plasmid amplification. Since amplification was very efficient, easy, and convenient, it might be adapted to a novel method for protein production. In the current study, we found that gene expression from the tandem plasmid repeat was suppressed. We identified several strategies to overcome this suppression, including: (1) use of higher concentrations of antibiotic during cell selection; (2) treatment of cells with agents that influence DNA methylation (5-azacytidine) or histone acetylation (butyrate); (3) co-amplification of an insulator sequence; and (4) co-amplification of sequences that encode a transcriptional activator. Expression from the plasmid repeat was always higher at DMs compared to HSRs. We found that continuous activation of a plasmid-encoded inducible promoter prevented the generation of long HSRs, and favored amplification at DMs. Consistent with this finding, there was a synergistic effect of transcriptional activation and inhibition of DNA methylation on the fragmentation of long HSRs and the generation of DMs and short HSRs. Our results indicate that both transcriptional activation and DNA methylation regulate the interconversion between extra- and intra-chromosomal gene amplification. These results have important implications for both protein production technology, and the generation of chromosomal abnormalities found in human cancer cells.
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Affiliation(s)
- Noriaki Shimizu
- Graduate School of Biosphere Science, Hiroshima University, Higashi-hiroshima, Hiroshima 739-8521, Japan.
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28
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Kiguchi M, Sekiguchi N, Murakoshi K. In-situ preparation of a single molecular junction with mechanically controllable break junctions in vacuum. ACTA ACUST UNITED AC 2008. [DOI: 10.1088/1742-6596/100/5/052059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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29
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Tanimoto K, Kaneko A, Suzuki S, Sekiguchi N, Watanabe T, Kobayashi Y, Kagami Y, Maeshima AM, Matsuno Y, Tobinai K. Primary ocular adnexal MALT lymphoma (POAML): A long-term follow up study of 114 patients (pts). J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.7593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
7593 Background: Although POAML is a recently recognized distinct entity, its natural history, prognostic factors, behavior of progression and death, and standard initial management have not been fully elucidated. Methods: 114 pts with a histologically verified POAML treated at our institution between 1970 and 2003 were retrospectively analyzed. Results: With a median follow-up duration of 5.7 years (0.6–34.0), estimated overall survival (OS) rate and progression-free survival (PFS) rate at 10 years was 89% and 57%, respectively. Older pts (>60) showed significantly worse OS (p=0.002). However, other clinical factors did not affect significantly OS or PFS. 13 (11%) pts died, but only 3 (3%) due to progressive lymphoma. 31 (27%) pts progressed, 7(6%) at systemic diseases, 8 (7%) at contra lateral sites, and 16 (14%) at the same sites, and only 2 (2%) transformed high-grade lymphoma. All 8 pts who progressed at contra lateral sites were limited to those who had involved initially in the orbit (p=0.036) and their time to progression was significantly longer (p=0.039). Pts who received initially radiation-containing therapy were superior in PFS but not OS than those initially treated with other modalities (p=0.016 and 0.091, respectively). Moreover, when we compared the outcomes of no initial therapy cohort and immediate therapy cohort, there was no significant difference in OS and PFS (p=0.499 and 0.073, respectively). Conclusions: The majority of pts with POAML showed the behaviors of very indolent diseases, and only age was significant prognostic factor. Our preliminary observation suggesting that no initial therapy is an acceptable approach for selected pts (Ann Oncol 2006;17:135–40) was further confirmed in this study for all cohorts. Considering the possible heterogeneity of POAML among initial sites suggested by the present study and the genetic heterogeneity revealed by our previous study (Blood 2005;106:289a), further investigations on POAML are warranted. No significant financial relationships to disclose.
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Affiliation(s)
- K. Tanimoto
- National Cancer Center Hospital, Tokyo, Japan
| | - A. Kaneko
- National Cancer Center Hospital, Tokyo, Japan
| | - S. Suzuki
- National Cancer Center Hospital, Tokyo, Japan
| | | | - T. Watanabe
- National Cancer Center Hospital, Tokyo, Japan
| | | | - Y. Kagami
- National Cancer Center Hospital, Tokyo, Japan
| | | | - Y. Matsuno
- National Cancer Center Hospital, Tokyo, Japan
| | - K. Tobinai
- National Cancer Center Hospital, Tokyo, Japan
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30
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Tanimoto K, Kaneko A, Suzuki S, Sekiguchi N, Maruyama D, Kim SW, Watanabe T, Kobayashi Y, Kagami Y, Maeshima A, Matsuno Y, Tobinai K. Long-term follow-up results of no initial therapy for ocular adnexal MALT lymphoma. Ann Oncol 2006; 17:135-40. [PMID: 16236754 DOI: 10.1093/annonc/mdj025] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.1] [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: 11/12/2022] Open
Abstract
BACKGROUND The majority of lymphomas in the ocular adnexa are low-grade B-cell lymphomas of mucosa-associated lymphoid tissue (MALT lymphoma). Although radiotherapy is the most frequently applied management, cataract and dry eye are problematic complications. PATIENTS AND METHODS Between 1973 and 2003, the clinical features of 36 patients with ocular adnexal MALT lymphoma with no symptoms who were managed with no initial therapy after biopsy or surgical resection were retrospectively analyzed. RESULTS The median patient age was 63 years (range 22-84) and all patients had stage I disease, consisting of 31 unilateral cases and five bilateral cases. With a median follow-up of 7.1 years, 25 (69%) did not require treatment. The median time until the initiation of treatment in the remaining 11 patients (31%) was 4.8 years. Six patients (17%) died, and among them only two (6%) died due to progressive lymphoma. Seventeen patients (47%) progressed, but histologic transformation was recognized in only one (3%). The estimated overall survival rates of the 36 patients after 5, 10 and 15 years were 94%, 94% and 71%, respectively. CONCLUSIONS In selected patients with ocular adnexal MALT lymphoma, no initial therapy might be an acceptable approach, because 70% of patients remained untreated at a median of 8.6 years, and their survival was comparable to that of reports on immediate therapy.
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Affiliation(s)
- K Tanimoto
- Hematology and Stem Cell Transplantation Division, National Cancer Center Hospital and Research Institute, Tokyo, Japan
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31
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Kaito K, Katayama T, Masuoka H, Nishiwaki K, Sano K, Sekiguchi N, Hagino T, Kobayashi M. CD2+ acute promyelocytic leukemia is associated with leukocytosis, variant morphology and poorer prognosis. ACTA ACUST UNITED AC 2005; 27:307-11. [PMID: 16178910 DOI: 10.1111/j.1365-2257.2005.00715.x] [Citation(s) in RCA: 10] [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: 11/27/2022]
Abstract
The T cell-lineage marker CD2 is sometimes expressed in acute promyelocytic leukemia (APL), and CD2 expression is reported to correlate with some clinical characteristics. However, the significance of CD2 expression in APL has not been fully elucidated. We evaluated CD2 expression in APL treated by the same treatment strategy in a single institute, and whether it had any special characteristics. Among 29 APL, 6 were positive for CD2. Patients with CD2+ APL tended to have a higher leukocyte count than CD2- APL (34.5 +/- 13.1/l vs. 6.8 +/- 2.1/l), morphological characteristics as variant-APL (50 vs. 0%). They also showed poor clinical prognosis. The CR rate of CD2- APL was 87.0% while that of CD2+ APL was 50 %. The mortality was 13.0 and 66.7%, respectively, and the survival rate was significantly lower in CD2+ APL. CD2 expression was proven to be a risk factor associated with death in addition to the morphological characteristics of variant-APL and leukocytosis. These results indicated that CD2 expression might have a significant impact on the prognosis of APL. Whether CD2+ APL should be characterized as a special clinical entity should be discussed in a larger patient population.
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Affiliation(s)
- K Kaito
- Central Clinical Laboratory, Jikei University Hospital, Tokyo, Japan.
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32
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Sekiguchi N, Nishimoto J, Tanimoto K, Ohnishi Y, Watanabe T, Kobayashi Y, Asamura H, Kagami Y, Matsuno Y, Tobinai K. A clinicopathologic study of primary mediastinal large B-cell lymphoma (MLBCL) at a single institution in Japan. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.6686] [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)
| | | | - K. Tanimoto
- National Cancer Center Hospital, Tokyo, Japan
| | - Y. Ohnishi
- National Cancer Center Hospital, Tokyo, Japan
| | - T. Watanabe
- National Cancer Center Hospital, Tokyo, Japan
| | | | - H. Asamura
- National Cancer Center Hospital, Tokyo, Japan
| | - Y. Kagami
- National Cancer Center Hospital, Tokyo, Japan
| | - Y. Matsuno
- National Cancer Center Hospital, Tokyo, Japan
| | - K. Tobinai
- National Cancer Center Hospital, Tokyo, Japan
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33
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Inoguchi T, Tsubouchi H, Etoh T, Kakimoto M, Sonta T, Utsumi H, Sumimoto H, Yu HY, Sonoda N, Inuo M, Sato N, Sekiguchi N, Kobayashi K, Nawata H. A possible target of antioxidative therapy for diabetic vascular complications-vascular NAD(P)H oxidase. Curr Med Chem 2003; 10:1759-64. [PMID: 12871120 DOI: 10.2174/0929867033457133] [Citation(s) in RCA: 36] [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: 11/22/2022]
Abstract
A growing body of evidence has shown that oxidative stress may be involved in the development of vascular complications associated with diabetes. However, the molecular mechanism for increased reactive oxygen species (ROS) production in diabetes remains uncertain. Among various possible mechanisms, attention have increasingly been paid to NAD(P)H oxidase as the most important source of ROS production in vascular cells. High glucose level stimulates ROS production through protein kinase C (PKC)-dependent activation of vascular NAD(P)H oxidase. Furthermore, the expression of NAD(P)H oxidase components is increased in micro- and macrovascular tissues of diabetic animals in association with various functional disorders and histochemical abnormalities. These results suggest that vascular NAD(P)H oxidase-driven ROS production may contribute to the onset or development of diabetic micro- or macrovascular complications. In this point of view, the possible new strategy of antioxidative therapy for diabetic vascular complications is discussed in this review.
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Affiliation(s)
- T Inoguchi
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
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34
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Kashiwagi K, Nagafuchi S, Sekiguchi N, Yamagata A, Iwata I, Furuya H, Kato M, Niho Y. Troglitazone not only reduced insulin resistance but also improved myotonia in a patient with myotonic dystrophy. Eur Neurol 2000; 41:171-2. [PMID: 10202252 DOI: 10.1159/000008045] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- K Kashiwagi
- First Department of Internal Medicine, Neurological Institute, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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35
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Mori Y, Wakamori M, Oda S, Fletcher CF, Sekiguchi N, Mori E, Copeland NG, Jenkins NA, Matsushita K, Matsuyama Z, Imoto K. Reduced voltage sensitivity of activation of P/Q-type Ca2+ channels is associated with the ataxic mouse mutation rolling Nagoya (tg(rol)). J Neurosci 2000; 20:5654-62. [PMID: 10908603 PMCID: PMC6772543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2000] [Revised: 05/02/2000] [Accepted: 05/15/2000] [Indexed: 02/17/2023] Open
Abstract
Recent genetic analyses have revealed an important association of the gene encoding the P/Q-type voltage-dependent Ca(2+) channel alpha(1A) subunit with hereditary neurological disorders. We have identified the ataxic mouse mutation, rolling Nagoya (tg(rol)), in the alpha(1A) gene that leads to a charge-neutralizing arginine-to-glycine substitution at position 1262 in the voltage sensor-forming segment S4 in repeat III. Ca(2+) channel currents in acutely dissociated Purkinje cells, where P-type is the dominant type, showed a marked decrease in slope and a depolarizing shift by 8 mV of the conductance-voltage curve and reduction in current density in tg(rol) mouse cerebella, compared with those in wild-type. Compatible functional change was induced by the tg(rol) mutation in the recombinant alpha(1A) channel, indicating that a defect in voltage sensor of P/Q-type Ca(2+) channels is the direct consequence of the tg(rol) mutation. Furthermore, somatic whole-cell recording of mutant Purkinje cells displayed only abortive Na(+) burst activity and hardly exhibited Ca(2+) spike activity in cerebellar slices. Thus, in tg(rol) mice, reduced voltage sensitivity, which may derive from a gating charge defect, and diminished activity of the P-type alpha(1A) Ca(2+) channel significantly impair integrative properties of Purkinje neurons, presumably resulting in locomotor deficits.
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Affiliation(s)
- Y Mori
- Department of Information Physiology, National Institute for Physiological Sciences, The Graduate University for Advanced Studies, Okazaki, Aichi, Japan.
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36
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Hakamada Y, Arima M, Misaka T, Yasuda D, Matsunaga T, Kusama M, Aoki T, Sekiguchi N, Koyanagi Y. [Significance of thymidylate synthase (TS) and dihydropyrimidine dehydrogenase (DPD) activity in breast cancer tissue]. Gan To Kagaku Ryoho 2000; 27:1003-10. [PMID: 10925685] [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: 02/17/2023]
Abstract
TS, DPD, uridine phosphorylase and thymidine phosphorylase are enzymes involved in the metabolism of the anticancer drug pyrimidine fluoride. In this study, levels of these enzymes were measured in 47 women with primary breast cancer. These enzyme levels were then compared to levels determined from breast cancer patients who received either preoperative chemotherapy or nothing, in order to determine whether they might predict clinical outcome. The TS inhibition rate was significantly higher (p < 0.05) in patients receiving preoperative chemotherapy (20.4 +/- 13.3%) than in the untreated group (11.4 +/- 9.8%). No other significant differences in activity were noted between the treated and untreated groups for any of the other enzymes studied. The activity of each enzyme at the tumor site and the tumor/normal (T/N) ratio were also compared between patients with and without recurrence. The TS inhibition rate at the tumor site was lower in recurring cases than in non-recurring cases, and the T/N ratio tended to be higher for DPD in patients with recurrences. These findings indicate that the TS inhibition rate and DPD activity may be useful predictors for early recurrence of breast cancer following surgery.
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Affiliation(s)
- Y Hakamada
- Dept. of Surgery, Tokyo Metropolitan Otsuka Hospital
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37
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Wakamori M, Yamazaki K, Matsunodaira H, Teramoto T, Tanaka I, Niidome T, Sawada K, Nishizawa Y, Sekiguchi N, Mori E, Mori Y, Imoto K. Single tottering mutations responsible for the neuropathic phenotype of the P-type calcium channel. J Biol Chem 1998; 273:34857-67. [PMID: 9857013 DOI: 10.1074/jbc.273.52.34857] [Citation(s) in RCA: 185] [Impact Index Per Article: 7.1] [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: 11/06/2022] Open
Abstract
Recent genetic and molecular biological analyses have revealed many forms of inherited channelopathies. Homozygous ataxic mice, tottering (tg) and leaner (tgla) mice, have mutations in the P/Q-type Ca2+ channel alpha1A subunit gene. Although their clinical phenotypes, histological changes, and locations of gene mutations are known, it remains unclear what phenotypes the mutant Ca2+ channels manifest, or whether the altered channel properties are the primary consequence of the mutations. To address these questions, we have characterized the electrophysiological properties of Ca2+ channels in cerebellar Purkinje cells, where the P-type is the dominant Ca2+ channel, dissociated from the normal, tg, and tgla mice, and compared them with the properties of the wild-type and mutant alpha1A channels recombinantly expressed with the alpha2 and beta subunits in baby hamster kidney cells. The most striking feature of Ca2+ channel currents of mutant Purkinje cells was a marked reduction in current density, being reduced to approximately 60 and approximately 40% of control in tg and tgla mice, respectively, without changes of cell size. The Ca2+ channel currents in the tg Purkinje cells showed a relative increase in non-inactivating component in voltage-dependent inactivation. Besides the same change, those of the tgla mice showed a more distinct change in voltage dependence of activation and inactivation, being shifted in the depolarizing direction by approximately 10 mV, with a broader voltage dependence of inactivation. In the recombinant expression system, the tg channel with a missense mutation (P601L) and one form of the two possible tgla aberrant splicing products, tgla (short) channel, showed a significant reduction in current density, while the other form of the tgla channels, tgla (long), had a current density comparable to the normal control. On the other hand, the shift in voltage dependence of activation and inactivation was observed only for the tgla (long) channel. Comparison of properties of the native and recombinant mutant channels suggests that single tottering mutations are directly responsible for the neuropathic phenotypes of reduction in current density and deviations in gating behavior, which lead to neuronal death and cerebellar atrophy.
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Affiliation(s)
- M Wakamori
- Department of Information Physiology, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan
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38
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Ono Y, Umeda F, Sekiguchi N, Hashimoto T, Masakado M, Nawata H. Reduced expression of a novel peptide, prostacyclin-stimulating factor, in the kidneys of streptozotocin-induced diabetic rats. J Diabetes Complications 1998; 12:252-8. [PMID: 9747641 DOI: 10.1016/s1056-8727(97)00091-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [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: 02/08/2023]
Abstract
Prostacyclin (PGI2) produced by vascular endothelial cells (ECs) is a potent vasoactive prostanoid involved in maintenance of vessel wall homeostasis. Reduced PGI2 synthesis by vascular ECs could be a mechanism of pathogenesis in the development of vascular lesions such as diabetic angiopathy. Recently, we purified and cloned a novel bioactive peptide, PGI2-stimulating factor (PSF), which stimulates PGI2 production by vascular ECs. PSF may act on vascular ECs in a paracrine and/or autocrine fashion to regulate PGI2 synthesis. Decreased PSF production in the vessel wall may result in an imbalance of prostanoid synthesis, leading to the development of vascular lesions such as diabetic angiopathy. Our immunohistochemical study demonstrated that PSF is located in vascular resident cells such as vascular smooth muscle cells (SMCs) and ECs, as well as in bronchial SMCs. Moreover, PSF mRNA was found to be expressed in various tissues in Wistar rats, particularly in the kidneys and lungs. The present study demonstrated that streptozotocin (STZ)-induced diabetic rats showed less PSF mRNA expression in the kidneys (PSF mRNA/28S rRNA ratio; STZ versus control; 1.7+/-0.2 versus 2.5+/-0.2, p < 0.05) and reduced immunohistochemical staining for PSF in arteries in the kidney. However, in the lungs, there were no changes in tissue PSF mRNA expression (STZ versus control; 10.9+/-0.9 versus 11.5+/-1.0, NS) or in the extent of PSF staining in bronchial SMCs of STZ-induced diabetic rats. These findings suggest that decreased expression of PSF in renal vessels of STZ-induced diabetic rats may cause an imbalance of prostanoid synthesis, leading to the development and progression of vascular damage in the kidney.
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Affiliation(s)
- Y Ono
- Third Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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39
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Abstract
Ryanodine receptors (RyRs) are present in the endoplasmic reticulum of virtually every cell type and serve critical roles, including excitation-contraction (EC) coupling in muscle cells. In skeletal muscle the primary control of RyR-1 (the predominant skeletal RyR isoform) occurs via an interaction with plasmalemmal dihydropyridine receptors (DHPRs), which function as both voltage sensors for EC coupling and as L-type Ca2+ channels (Rios, E., and Brum, G. (1987) Nature 325, 717-720). In addition to "receiving" the EC coupling signal from the DHPR, RyR-1 also "transmits" a retrograde signal that enhances the Ca2+ channel activity of the DHPR (Nakai, J., Dirksen, R. T., Nguyen, H. T., Pessah, I. N., Beam, K. G., and Allen, P. D. (1996) Nature 380, 72-76). A similar kind of retrograde signaling (from RyRs to L-type Ca2+ channels) has also been reported in neurons (Chavis, P., Fagni, L., Lansman, J. B., and Bockaert, J. (1996) Nature 382, 719-722). To investigate the molecular mechanism of reciprocal signaling, we constructed cDNAs encoding chimeras of RyR-1 and RyR-2 (the predominant cardiac RyR isoform) and expressed them in dyspedic myotubes, which lack an endogenous RyR-1. We found that a chimera that contained residues 1,635-2,636 of RyR-1 both mediated skeletal-type EC coupling and enhanced Ca2+ channel function, whereas a chimera containing adjacent RyR-1 residues (2, 659-3,720) was only able to enhance Ca2+ channel function. These results demonstrate that two distinct regions are involved in the reciprocal interactions of RyR-1 with the skeletal DHPR.
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Affiliation(s)
- J Nakai
- Department of Information Physiology, National Institute for Physiological Sciences, Myodaiji-cho, Okazaki, 444, Japan
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40
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Umeda F, Ono Y, Sekiguchi N, Hashimoto T, Masakado M, Nakamura K, Chijiiwa Y, Nawata H. Increased mRNA expression of a novel prostacyclin-stimulating factor in human colon cancer. J Gastroenterol 1998; 33:213-7. [PMID: 9605951 DOI: 10.1007/s005350050072] [Citation(s) in RCA: 10] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We recently cloned a prostacyclin (PGl2)-stimulating factor (PSF), which stimulates PGl2 production by cultured vascular endothelial cells. Immunohistochemistry and Northern blot analysis demonstrated that PSF was highly expressed in colon cancer sites compared with normal colon mucosa obtained from the same patient, as well as in cultured adenocarcinoma cell lines compared with cultured normal colon mucosal cell lines. Increased levels of the PSF protein were detected in the culture media of these adenocarcinoma cells compared with levels in the culture media of normal mucosal cells. These results suggest that PSF is closely associated with carcinogenesis of colon mucosa.
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Affiliation(s)
- F Umeda
- Third Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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41
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Ueki M, Watanabe Y, Hattori H, Sekiguchi N, Sanada T, Amaha K. [Anesthetic management of abdominal gunshot wound--a report of three cases]. Masui 1998; 47:494-6. [PMID: 9594527] [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: 02/07/2023]
Abstract
This is a case report of anesthetic management of abdominal gunshot wound. Two patients had upper abdominal wound involving the liver and the inferior vena cava. They died of uncontrolled bleeding. Third patient had lower abdominal injury involving the ascending colon and small intestine. The patient survived the injury and showed good recovery. In a case of the abdominal gunshot injury, prompt diagnosis and laparotomy are mandatory. Multiple intravenous routes are necessary in the upper part of the body for massive infusion and transfusion. Unusual hemostasis methods such as atrio-caval shunt or abdominal clamping of the aorta must be considered in case of injury in the inferior vena cava.
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Affiliation(s)
- M Ueki
- Department of Anesthesiology and Critical Care Medicine, Tokyo Medical and Dental University
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42
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Ono Y, Umeda F, Kunisaki M, Sekiguchi N, Hashimoto T, Nawata H. Effect of high glucose concentrations on prostacyclin-stimulating factor mRNA expression in cultured aortic smooth muscle cells. Diabetologia 1998; 41:134-40. [PMID: 9498645 DOI: 10.1007/s001250050881] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Prostacyclin (PGI2) is a potent vasoactive prostanoid regulating vascular tone. We recently purified and cloned a PGI2-stimulating factor (PSF), which stimulates PGI2 production by vascular endothelial cells (ECs). Previous study demonstrated that PSF is predominantly located in vascular smooth muscle cells (SMCs) and present in serum. PSF may act on vascular ECs to regulate PGI2 synthesis for maintaining vessel wall homeostasis. Decreased PSF production in the vessel wall may result in an imbalance of prostanoid synthesis, leading to the development of vascular lesions such as diabetic angiopathy. In the present study, to investigate the regulatory mechanisms of PSF gene expression, we examined the effect of high glucose concentrations on PSF mRNA expression in cultured bovine aortic SMCs. Expression of PSF mRNA was significantly decreased to 66+/-6% of control value (p < 0.01), when the glucose level was raised from 5.5 to 27.8 mmol/l. We also examined the effect of osmolarity on PSF mRNA expression by addition of an appropriate dose of mannitol to the culture medium. We confirmed that high glucose concentration itself reduced the expression of PSF mRNA and glucose had much more effect than the osmolarity control. The expression of PSF mRNA was significantly decreased to 72+/-5% of control value (p < 0.05) by a protein kinase C (PKC) activator, phorbol-12-myristate-13-acetate (PMA). The decreased expression of PSF mRNA in the presence of high glucose or PMA was restored by co-incubation with a PKC-specific inhibitor (GF109203X). These results suggest that PSF gene expression in vascular SMCs may be decreased via a specific effect of high glucose concentrations. High glucose-induced activation of PKC is suggested to participate partly in the regulation of PSF gene expression.
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Affiliation(s)
- Y Ono
- Third Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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43
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Sekiguchi N, Umeda F. [Aortic pulse wave velocity]. Nihon Rinsho 1998; 56 Suppl 3:475-8. [PMID: 9513465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- N Sekiguchi
- Third Department of Internal Medicine, Faculty of Medicine, Kyushu University
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44
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Joko T, Iwashige K, Hashimoto T, Ono Y, Kobayashi K, Sekiguchi N, Kuroki T, Yanase T, Takayanagi R, Umeda F, Nawata H. A case of mitochondrial encephalomyopathy, lactic acidosis and stroke-like episodes associated with diabetes mellitus and hypothalamo-pituitary dysfunction. Endocr J 1997; 44:805-9. [PMID: 9622295 DOI: 10.1507/endocrj.44.805] [Citation(s) in RCA: 10] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
A 45-year-old woman with mitochondrial encephalomyopathy, lactic acidosis and stroke-like episodes (MELAS) had muscular atrophy, severe cerebral and cerebellar atrophy, and cardiac hypertrophy. She also had diabetes mellitus treated with insulin, and sensorineural hearing loss. Ragged-red fibers were observed on muscle biopsy and an adenine to guanine transition mutation at position 3243 of her mitochondrial DNA was confirmed. Further investigations revealed that she also had hypothalamo-pituitary dysfunction. It appears that diabetes mellitus, hypothalamo-pituitary dysfunction, and the other abnormalities are all associated with mitochondrial dysfunction in this patient.
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Affiliation(s)
- T Joko
- Third Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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45
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Sekiguchi N, Umeda F, Masakado M, Ono Y, Hashimoto T, Nawata H. Immunohistochemical study of prostacyclin-stimulating factor (PSF) in the diabetic and atherosclerotic human coronary artery. Diabetes 1997; 46:1627-32. [PMID: 9313760 DOI: 10.2337/diacare.46.10.1627] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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: 02/05/2023]
Abstract
Prostacyclin (PGI2) synthesis by vascular endothelial cells (ECs) decreases in diabetic subjects, possibly leading to the development of diabetic angiopathy, such as that seen in atherosclerosis. We recently found a novel bioactive peptide, prostacyclin-stimulating factor (PSF), which stimulates PGI2 synthesis by cultured aortic ECs. Our previous studies demonstrated that PSF is dominantly expressed by arterial smooth muscle cells (SMCs). In the present study, we found PSF to exist in the SMCs of human coronary arteries by means of immunohistochemical methods. Human coronary arteries obtained from autopsies were divided into four subgroups, with or without NIDDM and/or myocardial infarction. Immunostaining for PSF was performed by the avidin-biotin peroxidase complex method using a purified anti-PSF antibody, and the immunostaining for PSF was assessed semiquantitatively. PSF staining was markedly reduced in coronary arterial SMCs from patients with NIDDM and/or myocardial infarction. In addition, the effect of a high glucose culture on PSF mRNA expression and PSF production in bovine aortic SMCs was examined by immunocytochemical staining and both Western and Northern blot analyses. The immunostaining and immunoblot band for PSF also significantly decreased when bovine aortic SMCs were cultured with high concentrations of glucose. Furthermore, as compared with the SMCs cultured with a physiological glucose concentration, the density ratio of PSF mRNA to 28S rRNA expression significantly decreased when the SMCs were cultured with high concentrations of glucose. These results strongly suggest that the decreased PSF production may thus results in a decreased production of PGI2 in the coronary artery, thus leading to the development of both diabetic macroangiopathy and atherosclerosis.
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Affiliation(s)
- N Sekiguchi
- Third Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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46
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Mita T, Nakai T, Sekiguchi N, Monya K, Katayama K, Kajimoto Y, Nishino N. [Psychiatric effects of the great Hanshin earthquake (1995): from the psychiatric outpatient department of a general hospital close to the disaster-stricken area]. Seishin Shinkeigaku Zasshi 1997; 99:215-233. [PMID: 9170983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- T Mita
- Department of Psychiatry, Saiscikai Nakatsu Hospital, Osaka
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47
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Hashimoto T, Sekiguchi N, Masakado M, Ono Y, Kuroki T, Sano T, Nawata H, Umeda F. Human diploid fibroblast cell culture medium contains a factor that increases cytosolic Ca2+ and stimulates prostaglandin synthesis by cultured bovine aortic endothelial cells. Horm Metab Res 1997; 29:38-42. [PMID: 9049653 DOI: 10.1055/s-2007-978978] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 02/03/2023]
Abstract
Previously, we demonstrated that conditioned medium (CM) from cultures of human diploid fibroblast cells contains a factor that stimulates the production of prostacyclin (PGI2) by cultured bovine aortic endothelial cells (BAEC). To study the mechanism by which CM stimulates PGI2 production, we measured the effect of removal of extracellular calcium (Ca2+) on the concentration of cytosolic Ca2+ and on the production of 6-keto-prostaglandin F1 alpha (6-keto-PGF1 alpha), a stable metabolite of PGI2. The CM-induced production of 6-keto-PGF1 alpha was dependent on extracellular Ca2+ and did not require nascent protein synthesis. Application of CM to BAEC induced a transient increase in cytosolic Ca2+ concentration that was dependent on extracellular Ca2+. Bradykinin induced the production of 6-keto-PGF1 alpha by BAEC. However, bradykinin induced an increase in cytosolic Ca2+ concentration in the presence or absence of extracellular Ca2+. Voltage dependent Ca2+ channel blocker (verapamil, diltiazem) did not inhibit either the CM-induced increase in cytosolic Ca2+ or the production of 6-keto-PGF1 alpha by BAEC. These data suggest that CM increases the cytosolic Ca2+ concentration and stimulates PGI2 production by BAEC. The increase in cytosolic Ca2+ concentration occurred via the influx of extracellular Ca2+ independent of L-type Ca2+ channels blocked by verapamil or diltiazem.
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Affiliation(s)
- T Hashimoto
- Third Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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48
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Umeda F, Masakado M, Takei A, Yamauchi T, Sekiguchi N, Hashimoto T, Nawata H. Difference in serum-induced prostacyclin production by cultured aortic and capillary endothelial cells. Prostaglandins Leukot Essent Fatty Acids 1997; 56:51-5. [PMID: 9044436 DOI: 10.1016/s0952-3278(97)90524-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Prostacyclin (PGl2) generated by vascular endothelial cells play an important role in the maintenance of vessel wall homeostasis. Human plasma-derived serum (PDS) stimulated PGl2 synthesis by both cultured bovine aortic endothelial cells (BAEC) and adrenal capillary endothelial cells (BCEC), but the PGl2 response of the latter cells was far smaller. When BAEC were cultured with a high concentration of glucose (400 mg/dl), the PGl2 synthesis induced by 20% PDS was significantly lower than in the culture with a physiological concentration of glucose (100 mg/dl) (258 +/- 45 pg/10(4) cells/h vs. 402 +/- 52 pg/10(4) cells/h, n = 4, P < 0.05). On the other hand, there was no significant difference in the PDS-induced PGl2 synthesis between BCEC cultured with high and physiological concentrations of glucose. Additionally, 10% PDS obtained from patients with non-insulin dependent diabetes mellitus (n = 6) stimulated significantly less PGl2 synthesis than that from healthy subjects (n = 4) in the case of both BAEC (133 +/- 27 pg/10(4) cells/h vs. 402 +/- 38 pg/10(4) cells/h, P < 0.05) and BCEC (72 +/- 15 pg/10(4) cells/h vs. 118 +/- 12 pg/10(4) cells/h, P < 0.05), with the difference in PGl2 synthesis being smaller for BCEC. These findings indicate that the PDS-induced PGl2 synthesis differs between cultured vascular endothelial cells from large and small vessels with the decrease in PGl2 by diabetic PDS and high glucose being more marked for BAEC than BCEC.
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Affiliation(s)
- F Umeda
- Third Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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49
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Suzuki S, Sugisaki M, Kim Y, Sekiguchi N, Kadomura S, Tanabe H. Effects of NK433 (Ianperisone hydrochloride) in the rat model of masseter muscle ischemia. Int J Oral Maxillofac Surg 1997. [DOI: 10.1016/s0901-5027(97)81148-4] [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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50
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Watanabe T, Isoyama S, Nakamura A, Shirato K, Kubota H, Sekiguchi N, Sato F, Katoh A, Munakata K, Sugi M, Nozaki E, Nishioka O, Tamaki K, Akai K, Araki T, Yokoyama K. Anti-atherogenicity in women does not prevent restenosis after balloon angioplasty. Heart Vessels 1997; 12:60-6. [PMID: 9403309 DOI: 10.1007/bf02820868] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
To test the hypothesis that anti-atherogenicity in women exerts beneficial effects to prevent restenosis formation after coronary angioplasty, we studied 493 men (988 lesions) and 81 women (159 lesions), aged 40-60 years, who had undergone successful balloon angioplasty and had follow-up angiography, 4.9 +/- 4.1 months later. We compared the extent of restenosis between men and women, and between pre- and post-menopausal women, which was assessed by a categorical definition of restenosis (more than 50% diameter stenosis at follow-up) and by percent diameter measured immediately after angioplasty and at follow-up. Hypertension was more frequent in women and a significantly lower percentage of women smoked. In women, the levels of total cholesterol and low-density lipoprotein cholesterol were higher. The location of dilated lesions, frequency of angioplasty for lesions with chronic total occlusion, and frequency of emergency angioplasty in patients with unstable angina or acute myocardial infarction were similar in men and women. Restenosis formation, estimated by the categorical definition or percent diameter, did not differ between men and women, or between pre- and post-menopausal women. Menopausal status or sex was not an independent predictor of restenosis by multivariate analysis. Thus, the benefit of anti-atherogenicity in women does not play an important role in preventing restenosis after coronary angioplasty.
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Affiliation(s)
- T Watanabe
- First Department of Internal Medicine, Tohoku University School of Medicine, Sendai, Japan
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