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Konishi S, Ishibashi S, Shimizu S, Watanabe K, Abdalkader R, Fujita T. Openable artificial intestinal tract device integrated with a permeable filter for evaluating drug permeation through cells. Sci Rep 2023; 13:11519. [PMID: 37460617 DOI: 10.1038/s41598-023-38522-x] [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] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 07/10/2023] [Indexed: 07/20/2023] Open
Abstract
Organs-on-chips using cultured cells have been developed and applied for evaluating in vitro biological phenomena. We previously reported an openable artificial intestinal tract system, as an in vitro model of the small intestine, for in vitro drug screening. The intestinal tract device could be transformed using an integrated artificial muscle actuator. An initial flat state was suitable for cell culture, and the transformed tubular structure was used as a fluidic channel for perfusion tests. The previously developed intestinal tract system could be used to evaluate drug absorption by cells through perfusion testing. This study presents an improved artificial intestinal tract system for analysis of drug permeation, in addition to absorption. Permeable filters were integrated into the intestinal tract device. Integration of additional filters into the design of the existing artificial muscle actuator was accomplished by considering device performance and available filter locations. Filter permeability was evaluated by perfusion testing. MDCK-II cells were cultured on the device and visually and electrically evaluated. The openable device, equipped with new functions for further pharmacokinetic analysis, could perform and evaluate drug disposition using cultured cells. We anticipate that the improved, openable organ-on-a-chip device system will contribute to advances in in vitro drug screening technology.
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Affiliation(s)
- Satoshi Konishi
- Department of Mechanical Engineering, College of Science and Engineering, Ritsumeikan University, Kusatsu, 525-8577, Japan.
- Graduate Course of Science and Engineering, Ritsumeikan University, Kusatsu, 525-8577, Japan.
- Ritsumeikan Advanced Research Academy, Kyoto, 604-8520, Japan.
- Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, Kusatsu, 525-8577, Japan.
| | - Shingo Ishibashi
- Graduate Course of Science and Engineering, Ritsumeikan University, Kusatsu, 525-8577, Japan
| | - Shiho Shimizu
- Graduate Course of Science and Engineering, Ritsumeikan University, Kusatsu, 525-8577, Japan
| | - Keita Watanabe
- Graduate School of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga, 525-8577, Japan
| | - Rodi Abdalkader
- Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, Kusatsu, 525-8577, Japan
| | - Takuya Fujita
- Ritsumeikan Global Innovation Research Organization, Ritsumeikan University, Kusatsu, 525-8577, Japan
- Graduate School of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga, 525-8577, Japan
- Department of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga, 525-8577, Japan
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Yamashita S, Arai H, Yokote K, Araki E, Hounslow N, Ikeda K, Nojima T, Suganami H, Ishibashi S. Response of lipoproteins to a meal tolerance test in patients with type 2 diabetes and hypertriglyceridemia. Atherosclerosis 2022. [DOI: 10.1016/j.atherosclerosis.2022.06.429] [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: 11/28/2022]
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Nishida Y, Takahashi YK, Kanai T, Nose Y, Ishibashi S, Sanjo N, Uzawa A, Oda F, Ozawa Y, Kuwabara S, Noguchi E, Suzuki S, Nakahara J, Suzuki N, Ogawa T, Yokoyama K, Hattori N, Konno S, Fujioka T, Kawaguchi N, Hatanaka Y, Sonoo M, Kaneko J, Ogino M, Nishiyama K, Nomura K, Yokota T. Safety of tapering tacrolimus dose in patients with well-controlled anti-acetylcholine receptor antibody-positive myasthenia gravis. Eur J Neurol 2019; 27:100-104. [PMID: 31309642 DOI: 10.1111/ene.14039] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 07/10/2019] [Indexed: 01/09/2023]
Abstract
BACKGROUND AND PURPOSE Tapering immunosuppressants is desirable in patients with well-controlled myasthenia gravis (MG). However, the association between tapering of calcineurin inhibitor dosage and reduction-associated exacerbation is not known. The aim of this study was to clarify the frequency of reduction-associated exacerbation when tacrolimus is tapered in stable patients with anti-acetylcholine receptor antibody-positive MG, and to determine the factors that predict exacerbations. METHODS We retrospectively analyzed 115 patients in whom tacrolimus dosage was tapered. The reduction-associated exacerbation was defined as the appearance or worsening of one or more MG symptoms <3 months after the reduction. RESULTS Tacrolimus dosage was successfully tapered in 110 patients (96%) without any exacerbation. Five patients (4%) experienced an exacerbation, but symptoms were reversed in all patients when the tacrolimus dose was increased to the previous maintenance level. No patient developed an MG crisis. The age at onset was significantly earlier (30 vs. 56 years, P = 0.025) and the reduction in dosage was significantly larger (2.0 vs. 1.0 mg/day, P = 0.002) in patients with reduction-associated exacerbation than in those without exacerbation. The cut-off values determined in a receiver-operating characteristic curve analysis were 52 years (sensitivity, 57%; specificity, 100%) for the age at onset and 1.5 mg (sensitivity, 80%; specificity, 100%) for the dose reduction. CONCLUSION Tapering of tacrolimus was possible in most patients with well-controlled anti-acetylcholine receptor antibody-positive MG. Early age at onset and a large reduction from maintenance dosage were associated with exacerbation. Reductions ≤1.5 mg/day from the maintenance dosage should be considered for patients with late-onset disease.
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Affiliation(s)
- Y Nishida
- Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Y K Takahashi
- Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - T Kanai
- Department of Neurology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Y Nose
- Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - S Ishibashi
- Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - N Sanjo
- Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - A Uzawa
- Department of Neurology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - F Oda
- Department of Neurology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Y Ozawa
- Department of Neurology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - S Kuwabara
- Department of Neurology, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - E Noguchi
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - S Suzuki
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - J Nakahara
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - N Suzuki
- Department of Neurology, Keio University School of Medicine, Tokyo, Japan
| | - T Ogawa
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - K Yokoyama
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - N Hattori
- Department of Neurology, Juntendo University School of Medicine, Tokyo, Japan
| | - S Konno
- Department of Neurology, Toho University Ohashi Medical Center, Tokyo, Japan
| | - T Fujioka
- Department of Neurology, Toho University Ohashi Medical Center, Tokyo, Japan
| | | | - Y Hatanaka
- Department of Neurology, Teikyo University School of Medicine, Tokyo, Japan
| | - M Sonoo
- Department of Neurology, Teikyo University School of Medicine, Tokyo, Japan
| | - J Kaneko
- Department of Neurology, Kitasato University School of Medicine, Kanagawa, Japan
| | - M Ogino
- School of Medicine, Center for Medical Education, International University of Health and Welfare, Chiba, Japan
| | - K Nishiyama
- Department of Neurology, Kitasato University School of Medicine, Kanagawa, Japan
| | - K Nomura
- Department of Neurology, Saitama Medical Center, Saitama Medical University, Saitama, Japan
| | - T Yokota
- Department of Neurology and Neurological Science, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Ito T, Hoshina T, Mizuki K, Fukuda T, Ishibashi S, Kusuhara K. A pediatric case with parvovirus B19-associated uveitis without autoantibody formation. Nagoya J Med Sci 2018; 80:611-614. [PMID: 30587876 PMCID: PMC6295435 DOI: 10.18999/nagjms.80.4.611] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Acute parvovirus B19 (B19) infection is often accompanied by autoantibody formation, including antinuclear antibodies and rheumatoid factor, and the symptoms of the infection are similar to those of several autoimmune diseases. Uveitis is a representative manifestation of autoimmune diseases and is rarely caused by B19. Autoantibody formation was confirmed in 2 previously reported cases with B19-associated uveitis. However, whether B19-associated uveitis is caused by the direct invasion of the virus or the induction of autoimmunity remains unclear. We herein report a pediatric case with B19-associated uveitis without autoantibody formation. We speculated that B19 might have directly invaded the eye in this patient because of the development of uveitis without antibody formation and the negative results for anti-B19-specific antibodies in the serum at the onset of the disease. Although the mechanism of invasion is unknown, B19 may have a high affinity for tissue in the eye.
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Affiliation(s)
- Takuma Ito
- Department of Pediatrics, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Takayuki Hoshina
- Department of Pediatrics, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Kazuyoshi Mizuki
- Department of Pediatrics, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Tomofumi Fukuda
- Department of Pediatrics, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Shingo Ishibashi
- Department of Ophthalmology, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
| | - Koichi Kusuhara
- Department of Pediatrics, School of Medicine, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan
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Ando A, Gantulga D, Nakata M, Maekawa F, Dezaki K, Ishibashi S, Yada T. Weaning stage hyperglycemia induces glucose-insensitivity in arcuate POMC neurons and hyperphagia in type 2 diabetic GK rats. Neuropeptides 2018. [PMID: 29525472 DOI: 10.1016/j.npep.2018.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Hyperphagia triggers and accelerates diabetes, and prevents proper dietary control of glycemia. Inversely, the impact of hyperglycemia on hyperphagia and possible mechanistic cause common for these two metabolic disorders in type 2 diabetes are less defined. The present study examined the precise developmental process of hyperglycemia and hyperphagia and explored the alterations in the hypothalamic arcuate nucleus (ARC), the primary feeding and metabolic center, in Goto-Kakizaki (GK) rats with type 2 diabetes and nearly normal body weight. At mid 3 to 4 weeks of age, GK rats first exhibited hyperglycemia, and then hyperphagia and reduced mRNA expressions for anorexigenic pro-opiomelanocortin (POMC) and glucokinase in ARC. Furthermore, [Ca2+]i responses to high glucose in ARC POMC neurons were impaired in GK rats at 4 weeks. Treating GK rats from early 3 to mid 6 weeks of age with an anti-diabetic medicine miglitol not only suppressed hyperglycemia but ameliorated hyperphagia and restored POMC mRNA expression in ARC. These results suggest that the early hyperglycemia occurring in weaning period may lead to impaired glucose sensing and neuronal activity of POMC neurons, and thereby induce hyperphagia in GK rats. Correction of hyperglycemia in the early period may prevent and/or ameliorate the progression of hyperphagia in type 2 diabetes.
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Affiliation(s)
- A Ando
- Division of Integrative Physiology, Department of Physiology, Jichi Medical University School of Medicine, 3311-1 Yakushiji, Shimotsuke, Tochigi 320-0498, Japan; Division of Endocrinology and Metabolism, Department of Internal Medicine, Jichi Medical University School of Medicine, 3311-1 Yakushiji, Shimotsuke, Tochigi 320-0498, Japan
| | - D Gantulga
- Division of Integrative Physiology, Department of Physiology, Jichi Medical University School of Medicine, 3311-1 Yakushiji, Shimotsuke, Tochigi 320-0498, Japan
| | - M Nakata
- Division of Integrative Physiology, Department of Physiology, Jichi Medical University School of Medicine, 3311-1 Yakushiji, Shimotsuke, Tochigi 320-0498, Japan
| | - F Maekawa
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba-City, Ibaragi 305-8506, Japan
| | - K Dezaki
- Division of Integrative Physiology, Department of Physiology, Jichi Medical University School of Medicine, 3311-1 Yakushiji, Shimotsuke, Tochigi 320-0498, Japan
| | - S Ishibashi
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Jichi Medical University School of Medicine, 3311-1 Yakushiji, Shimotsuke, Tochigi 320-0498, Japan
| | - T Yada
- Division of Integrative Physiology, Department of Physiology, Jichi Medical University School of Medicine, 3311-1 Yakushiji, Shimotsuke, Tochigi 320-0498, Japan; Kansai Electric Power Medical Research Institute, 1-5-6 Minatojimaminamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan.
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Ogata H, Tokuyama K, Nagasaka S, Ando A, Kusaka I, Sato N, Goto A, Ishibashi S, Kiyono K, Struzik Z, Yamamoto Y. Long-range Correlated Glucose Fluctuations in Diabetes. Methods Inf Med 2018. [DOI: 10.1055/s-0038-1625411] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Summary
Objectives
: Our objective is to investigate diabetes- related alteration of glucose control in diurnal fluctuations in normal daily life by detrended fluctuation analysis (DFA).
Methods
: The fluctuations of glucose of 12 non-diabetic subjects and 15 diabetic patients were measured using a continuous glucose monitoring system (CGMS) over a period of one day. The glucose data was calculated by the DFA method, which is capable of revealing the presence of long-range correlations in time series with inherent non-stationarity.
Results
: Compared with the non-diabetic subjects, the mean glucose level and the standard deviation are significantly higher in the diabetic group.The DFA exponent α is calculated, and glucose time series are searched for the presence of negatively (0.5 < α <1.5) or positively (1.5 < α) correlated fluctuations. A crossover phenomenon, i.e. a change in the level of correlations, is observed in the non-diabetic subjects at about two hours; the net effects of glucose flux/reflux causing temporal changes in glucose concentration are negatively correlated in a “long-range" (> two hours) regime. However, for diabetic patients, the DFA exponent α = 1.65 ± 0.30, and in the same regime positively correlated fluctuations are observed, suggesting that the net effects of the flux and reflux persist for many hours.
Conclusions
: Such long-range positive correlation in glucose homeostasis may reflect pathogenic mechanisms of diabetes, i.e., the lack of the tight control in blood glucose regulation. Using modern time series analysis methods such as DFA, continuous evaluation of glucose dynamics could promote better diagnoses and prognoses of diabetes and a better understanding of the fundamental mechanism of glucose dysregulation in diabetes.
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Horiuchi S, Kumai R, Ishibashi S. Strong polarization switching with low-energy loss in hydrogen-bonded organic antiferroelectrics. Chem Sci 2017; 9:425-432. [PMID: 29629113 PMCID: PMC5872138 DOI: 10.1039/c7sc03859c] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [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] [Received: 09/04/2017] [Accepted: 11/01/2017] [Indexed: 11/21/2022] Open
Abstract
The electric-field-induced phase transition from antipolar to polar structures is at the heart of antiferroelectricity. We demonstrate direct evidence of antiferroelectricity by applying a strong electric field to two antipolar crystals of squaric acid (SQA) and 5,5'-dimethyl-2,2'-bipyridinium chloranilate. The field-induced polarization of SQA is quite large and reasonably explained by the theoretically calculated polarization on the hydrogen-bonded sheet sublattice. The pseudo-tetragonal lattice of SQA permits unique switching topologies that produce two different ferroelectric phases of low and high polarizations. By tilting the applied field direction, the electrical switching mechanism can be attributed to a 90° rotation of the sheet polarization. From the viewpoint of applications, the strong polarization, high switching field, and quite slim hysteresis observed in the polarization versus electric field curve for SQA are advantageous for excellent-efficiency energy storage devices.
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Affiliation(s)
- S Horiuchi
- Flexible Electronics Research Center (FLEC) , National Institute of Advanced Industrial Science and Technology (AIST) , Tsukuba , Ibaraki 305-8565 , Japan .
| | - R Kumai
- Condensed Matter Research Center (CMRC) and Photon Factory , Institute of Materials Structure Science , High Energy Accelerator Research Organization (KEK) , Tsukuba , Ibaraki 305-0801 , Japan
| | - S Ishibashi
- Research Center for Computational Design of Advanced Functional Materials (CD-FMat) , National Institute of Advanced Industrial Science and Technology (AIST) , Tsukuba , Ibaraki 305-8568 , Japan
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Numasawa Y, Hattori T, Ishiai S, Kobayashi Z, Kamata T, Kotera M, Ishibashi S, Sanjo N, Mizusawa H, Yokota T. Components of depressive disorder due to raphe-nuclei damage: Subclass analysis of patients with brainstem infarction. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1794] [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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Iwasawa E, Li F, Ishibashi S, Ichijo M, Miki K, Yokota T. Expression of sphingosine-1-phosphate receptor 1 in leptomeningeal arteries is upregulated and its agonist improves neurological outcome in ischemic stroek in mice. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.338] [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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10
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Ichinose K, Ishibashi S, Miyashita A, Sanjo N, Uchida K, Suzuki Y, Sekine M, Kobayashi D, Eishi Y, Yokota T. Clinicopathological features of neuromuscular sarcoidosis and its immunoreactivity profiles of P. acne. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3518] [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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Li F, Ishibashi S, Iwasawa E, Song J, Ichijo M, Zhang Y, Piao W, Yoshida K, Yoshioka K, Kuwahara H, Nagata T, Yokota T. Gene silencing effect of heteroduplex oligonucleotide and its biodistribution in neurons and brain endothelial cells after ischemia. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2483] [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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Ono D, Ishibashi S, Yokota T. Paraspinal muscle density on computed tomography decreases in amyotrophic lateral sclerosis. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2283] [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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13
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Ichijo M, Ishibashi S, Miki K, Itaya S, Amino T, Kamata T, Yokota T. Significance of hyperintense vessels in negative DWI area as a prognostic factor after thrombolysis. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3672] [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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Yamada A, Numasawa Y, Hattori T, Ozaki K, Ishibashi S, Nishida Y, Kanouchi T, Sanjo N, Takanori Y. Signal changes of skeletal muscle MRI in peripheral nerve disorders. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3016] [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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Tanaka S, Kawasaki R, Tanaka-Mizuno S, Iimuro S, Matsunaga S, Moriya T, Ishibashi S, Katayama S, Ohashi Y, Akanuma Y, Sone H, Yamashita H. Severe hypoglycaemia is a major predictor of incident diabetic retinopathy in Japanese patients with type 2 diabetes. Diabetes Metab 2017; 43:424-429. [PMID: 28720342 DOI: 10.1016/j.diabet.2017.06.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Revised: 06/14/2017] [Accepted: 06/14/2017] [Indexed: 12/16/2022]
Abstract
AIM Hypoglycaemia is a common complication in diabetes patients. However, its relationship with retinopathy has not been well documented in patients with type 2 diabetes (T2D). This study aimed to investigate the associations between hypoglycaemia and the incidence and progression of diabetic retinopathy (DR). METHODS In this longitudinal cohort study, which was part of the Japan Diabetes Complications Study (JDCS), adult patients with T2D were recruited at 59 diabetes clinics across Japan. Their history of hypoglycaemia was assessed by standardized self-reported questionnaires. Severe hypoglycaemia was defined as having at least one episode with coma requiring an outpatients visit or hospitalization. Adjusted hazard ratios (HRs) for incidence and progression of DR over 8 years of follow-up were determined. RESULTS Of 1221 patients without DR, 127 (10.4%) had experienced non-severe hypoglycaemia within the previous year, whereas 10 (0.8%) reported severe hypoglycaemia episodes. During the 8-year follow-up involving 8492 person-years, 329 patients developed DR. In 410 patients with prevalent DR, the adjusted HRs for incident DR were 4.35 (95% CI: 1.98-9.56; P<0.01) and, for progression of DR, 2.29 (95% CI: 0.45-11.78; P=0.32) with severe hypoglycaemia. CONCLUSION Having a history of severe hypoglycaemia was one of the strongest predictors of incident DR in patients with T2D, with a fourfold increased risk. Identifying patients with greater risks of DR based on their history of hypoglycaemia may help to personalize risk evaluation in patients with diabetes.
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Affiliation(s)
- S Tanaka
- Department of pharmacoepidemiology, graduate longitudinal school of medicine and public health, Kyoto university, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, Japan
| | - R Kawasaki
- Department of public health, Yamagata university graduate school of medical science, 2-2-2 Iida-Nishi, Yamagata, Japan.
| | - S Tanaka-Mizuno
- Division of medical statistics, Shiga university of medical science, Tsukinowa Seta-cho, Ohtsu, Shiga, Japan
| | - S Iimuro
- Teikyo academic research centre, Teikyo university, Kaga, Itabashi-ku, Tokyo, Japan
| | - S Matsunaga
- Department of haematology, endocrinology and metabolism, faculty of medicine, Niigata university, 1-757 Asahi-machi, Chuo-ku, Niigata, Japan
| | - T Moriya
- Health care centre, Kitasato university, 1-15-1 Kitasato, Minami-ku, Sagamihara-shi, Kanagawa, Japan
| | - S Ishibashi
- Division of endocrinology and metabolism, school of medicine, Jichi medical university, 3311-1 Yakushiji, Shimotsuke, Tochigi, Japan
| | - S Katayama
- Kawagoe clinic, Saitama medical university, 21-7 Wakitahonchou, Kawagoe, Saitama, Japan
| | - Y Ohashi
- Department of integrated science and engineering for sustainable society, Chuo university, 1-13-27, Kasuga, Bunkyo-ku, Tokyo, Japan
| | - Y Akanuma
- The institute for adult diseases Asahi life foundation, 1-6-1 Marunouchi Chiyoda-ku, Tokyo, Japan
| | - H Sone
- Department of haematology, endocrinology and metabolism, faculty of medicine, Niigata university, 1-757 Asahi-machi, Chuo-ku, Niigata, Japan
| | - H Yamashita
- Department of ophthalmology and visual sciences, school of medicine, Yamagata university, 2-2-2 Iida-Nishi, Yamagata, Japan
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Hirahara N, Matsubara T, Kawahara D, Nakada S, Ishibashi S, Tajima Y. Prognostic significance of preoperative inflammatory response biomarkers in patients undergoing curative thoracoscopic esophagectomy for esophageal squamous cell carcinoma. Eur J Surg Oncol 2016; 43:493-501. [PMID: 28034501 DOI: 10.1016/j.ejso.2016.11.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 10/10/2016] [Accepted: 11/30/2016] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Recent studies have revealed significant relationships between the lymphocyte-to-monocyte ratio (LMR), neutrophil-to-lymphocyte ratio (NLR), and platelet-to-lymphocyte ratio (PLR) and survival in various cancers. The purpose of this study was to confirm whether the LMR, NLR, and PLR have prognostic values, independent of clinicopathological criteria, in patients undergoing curative resection for esophageal cancer. METHODS The LMR, NLR and PLR were calculated in 147 consecutive patients who underwent curative esophagectomy between January 2006 and December 2014. Receiver operating characteristics (ROC) curve analysis was conducted to identify the optimal cutoff values of each biomarkers. RESULTS In multivariate analysis for cancer-specific survival (CSS), pTNM stage (p < 0.0001) and low LMR (p = 0.0081) were selected as independent prognostic factor. Similarly, pTNM stage(p < 0.0001) and low LMR (p = 0.0225) were found to be independent prognostic factor for overall survival (OS). There was no significant relationship between LMR, NLR and PLR and survival in patients with stage I or II, however, significant relationships between LMR and CSS or OS were observed in patients with stage III esophageal cancer. CONCLUSIONS LMR can be used as a novel predictor of postoperative CSS and OS in patients with esophageal cancer and that it may be useful in identifying patients with a poor prognosis even after radical esophagectomy.
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Affiliation(s)
- N Hirahara
- Department of Digestive and General Surgery, Shimane University Faculty of Medicine, Japan.
| | - T Matsubara
- Department of Digestive and General Surgery, Shimane University Faculty of Medicine, Japan
| | - D Kawahara
- Department of Digestive and General Surgery, Shimane University Faculty of Medicine, Japan
| | - S Nakada
- Department of Digestive and General Surgery, Shimane University Faculty of Medicine, Japan
| | - S Ishibashi
- Department of Digestive and General Surgery, Shimane University Faculty of Medicine, Japan
| | - Y Tajima
- Department of Digestive and General Surgery, Shimane University Faculty of Medicine, Japan
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Itano M, Tachibana R, Yamashita M, Shimizu H, Sugawara Y, Kotabe K, Kamima T, Takahashi R, Ishibashi S, Uchida Y, Yamazaki T, Tachibana H. SU-F-T-494: A Multi-Institutional Study of Independent Dose Verification Using Golden Beam Data. Med Phys 2016. [DOI: 10.1118/1.4956679] [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: 11/07/2022] Open
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18
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Kawai D, Takahashi R, Kamima T, Baba H, Yamamoto T, Kubo Y, Ishibashi S, Higuchi Y, Tani K, Tachibana H. SU-F-T-609: Impact of Dosimetric Variation for Prescription Dose Using Analytical Anisotropic Algorithm (AAA) in Lung SBRT. Med Phys 2016. [DOI: 10.1118/1.4956794] [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: 11/07/2022] Open
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19
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Iijima S, Matsumoto N, Ishibashi S, Sugiyama Y. PIXE analysis of trace elements included in oral lichen planus-affected mucosa. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.137] [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]
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20
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Ichijo M, Iwasawa E, Numasawa Y, Miki K, Ishibashi S, Tomita M, Tomimitsu H, Kamata T, Fujigasaki H, Shintani S, Mizusawa H. Significance of Development and Reversion of Collaterals on MRI in Early Neurologic Improvement and Long-Term Functional Outcome after Intravenous Thrombolysis for Ischemic Stroke. AJNR Am J Neuroradiol 2015. [PMID: 26206807 DOI: 10.3174/ajnr.a4384] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Predicting response to rtPA is essential in the era of endovascular therapy for stroke. The purpose of this study was to elucidate prognostic factors of early neurologic improvement and long-term outcome with respect to the development and reversion of leptomeningeal collaterals in recanalization therapy after acute ischemic stroke. MATERIALS AND METHODS We analyzed consecutive patients with proximal MCA occlusion treated with rtPA from 2007 to 2012 at 2 hospital stroke centers. All patients routinely underwent brain MR imaging before rtPA. To assess the reversion of collateral signs, we included patients who underwent follow-up MR imaging. We assessed the development and reversion of collaterals by using a combination of 2 MR imaging collateral markers, the hyperintense vessel sign and the posterior cerebral artery laterality sign. Early neurologic improvement was defined as a decrease in the NIHSS score of ≥10 or a score of ≤2 at 24 hours of treatment. RESULTS Early neurologic improvement was observed in 22 of 48 eligible patients. The development of collaterals at arrival (15/22 versus 9/26, P = .042) was significantly associated with early neurologic improvement. Multivariate analysis adjusting for other variables showed that the development of collaterals at arrival (OR, 4.82; 95% CI, 1.34-19.98; P = .015) was independently associated with early neurologic improvement. Reversion of collaterals was significantly associated with successful recanalization (P < .001), and multivariate analysis showed that the reversion of collaterals was an independent prognostic factor of long-term functional outcome (OR, 5.07; 95% CI, 1.38-22.09; P = .013). CONCLUSIONS Our results indicate that the development of leptomeningeal collaterals plays a crucial role in achieving early neurologic improvement, and reversion of collaterals predicts a favorable outcome via arterial recanalization after rtPA treatment for acute stroke.
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Affiliation(s)
- M Ichijo
- From the Department of Neurology and Neurological Science (M.I., E.I., Y.N., S.I., and H.M.) Department of Neurology, Musashino Red Cross Hospital (M.I., T.K.), Tokyo, Japan
| | - E Iwasawa
- From the Department of Neurology and Neurological Science (M.I., E.I., Y.N., S.I., and H.M.)
| | - Y Numasawa
- From the Department of Neurology and Neurological Science (M.I., E.I., Y.N., S.I., and H.M.)
| | - K Miki
- Department of Endovascular Surgery (K.M.)
| | - S Ishibashi
- From the Department of Neurology and Neurological Science (M.I., E.I., Y.N., S.I., and H.M.)
| | - M Tomita
- Clinical Research Center (M.T.), Tokyo Medical and Dental University, Tokyo, Japan
| | - H Tomimitsu
- Department of Neurology, JA Toride Medical Center (H.T., S.S.), Ibaraki, Japan
| | - T Kamata
- Department of Neurology, Musashino Red Cross Hospital (M.I., T.K.), Tokyo, Japan
| | - H Fujigasaki
- Department of Internal Medicine (H.F.), Metropolitan Bokutoh Hospital, Tokyo, Japan
| | - S Shintani
- Department of Neurology, JA Toride Medical Center (H.T., S.S.), Ibaraki, Japan
| | - H Mizusawa
- From the Department of Neurology and Neurological Science (M.I., E.I., Y.N., S.I., and H.M.)
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21
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Yokote H, Nose Y, Ishibashi S, Tanaka K, Takahashi T, Fujihara K, Yokota T, Mizusawa H. Spinal cord ring enhancement in patients with neuromyelitis optica. Acta Neurol Scand 2015; 132:37-41. [PMID: 25639599 DOI: 10.1111/ane.12354] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/31/2014] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Clinical and pathological significance of gadolinium (Gd)-enhancing pattern on magnetic resonance imaging (MRI), including ring enhancement (RE), is well documented in multiple sclerosis but not in neuromyelitis optica (NMO), especially in the spinal cord. The purpose of this study is to examine the prevalence of spinal cord RE in NMO and to determine the association between clinical characteristics and spinal cord RE. MATERIALS AND METHODS We retrospectively examined Gd-enhanced spinal cord MRI scans, during the acute phase, in patients with anti-aquaporin 4-positive NMO, including NMO spectrum disorder. We then analysed their clinical features and MRI imaging characteristics of spinal cord lesions. RESULTS Of the 30 patients with NMO, we enrolled 12 patients with 16 Gd-enhanced spinal cord MRI scans in this study. Five scans revealed RE (31.2%). Male ratio, as well as myelin basic protein (MBP) levels, in the cerebrospinal fluid (CSF) of patients with RE was significantly higher than those of patients without RE (P = 0.018, P = 0.026, respectively). CONCLUSIONS Spinal cord RE is common in patients with NMO. Higher MBP levels in the CSF of patients with RE can be associated with a higher degree of myelin damage.
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Affiliation(s)
- H. Yokote
- Department of Neurology; Musashino Red Cross Hospital; Musashino Tokyo Japan
- Department of Neurology and Neurological Sciences; Tokyo Medical and Dental University; Bunkyo-ku Tokyo Japan
| | - Y. Nose
- Department of Neurology and Neurological Sciences; Tokyo Medical and Dental University; Bunkyo-ku Tokyo Japan
| | - S. Ishibashi
- Department of Neurology and Neurological Sciences; Tokyo Medical and Dental University; Bunkyo-ku Tokyo Japan
| | - K. Tanaka
- Department of Neurology; Kanazawa Medical University; Kanazawa Tokyo Japan
| | - T. Takahashi
- Department of Multiple sclerosis Therapeutics; Tohoku University Graduate School of Medicine; Sendai Tokyo Japan
| | - K. Fujihara
- Department of Multiple sclerosis Therapeutics; Tohoku University Graduate School of Medicine; Sendai Tokyo Japan
| | - T. Yokota
- Department of Neurology and Neurological Sciences; Tokyo Medical and Dental University; Bunkyo-ku Tokyo Japan
| | - H. Mizusawa
- Department of Neurology and Neurological Sciences; Tokyo Medical and Dental University; Bunkyo-ku Tokyo Japan
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Takahashi R, Tachibana H, Kamima T, Itano M, Yamazaki T, Ishibashi S, Higuchi Y, Shimizu H, Yamamoto T, Yamashita M, Baba H, Sugawara Y, Sato A, Nishiyama S, Kawai D, Miyaoka S. SU-E-T-48: A Multi-Institutional Study of Independent Dose Verification for Conventional, SRS and SBRT. Med Phys 2015. [DOI: 10.1118/1.4924409] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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23
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Kawai D, Takahashi R, Kamima T, Baba H, Yamamoto T, Kubo Y, Ishibashi S, Higuchi Y, Takahashi H, Tachibana H. SU-E-T-50: A Multi-Institutional Study of Independent Dose Verification Software Program for Lung SBRT. Med Phys 2015. [DOI: 10.1118/1.4924411] [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: 11/07/2022] Open
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24
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Enkhtuvshin B, Nagashima S, Saito N, Wakabayashi T, Ando A, Takahashi M, Sakai K, Yamamuro D, Nagasaka S, Tamemoto H, Ishibashi S. Successful pregnancy outcomes in a patient with type A insulin resistance syndrome. Diabet Med 2015; 32:e16-9. [PMID: 25472847 PMCID: PMC5034500 DOI: 10.1111/dme.12659] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/01/2014] [Indexed: 11/28/2022]
Abstract
BACKGROUND The management of severe insulin resistance during pregnancy is challenging because of the increased risk of perinatal complications for both mother and fetus. We describe two consecutive pregnancies in a patient with severe insulin resistance caused by a mutation in the β subunit of the insulin receptor. CASE REPORT A non-obese Japanese woman was diagnosed as having diabetes mellitus during her first pregnancy at age 31 years. She presented at 6 weeks' gestation with a fasting plasma glucose concentration of 15.1 mmol/l and an HbA(1c) level of 95 mmol/mol (10.8%). Fasting insulin concentration was high at 68.8 μU/ml, suggesting severe insulin resistance. Anti-insulin and insulin-receptor antibodies were both negative. Genetic analysis revealed an in-frame heterozygous deletion mutation (∆Leu(999)) in the insulin receptor gene. Despite large daily doses (up to 480 units per day) of insulin aspart and isophane, the patient's postprandial plasma glucose level exceeded 11.1 mmol/l. In the patient's second pregnancy, the addition of metformin at a dose of 2250 mg per day achieved tighter glycaemic control, with lower doses of insulin lispro and isophane (up to 174 units/day). Both newborns, who were found to carry the same mutation, were small for gestational age and developed transient hypoglycaemia after birth. CONCLUSION Adding metformin to the conventional insulin regimen effectively achieved tight glycaemic control with a lower dose of insulin. The mutation of the insulin receptor gene might underlie the intrauterine growth retardation of the newborns. To our knowledge, this is the first report of successful management of diabetes mellitus in a pregnant woman with type A insulin resistance syndrome.
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Affiliation(s)
- B Enkhtuvshin
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Shimotsuke, Tochigi, Japan
| | - S Nagashima
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Shimotsuke, Tochigi, Japan
| | - N Saito
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Shimotsuke, Tochigi, Japan
| | - T Wakabayashi
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Shimotsuke, Tochigi, Japan
| | - A Ando
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Shimotsuke, Tochigi, Japan
| | - M Takahashi
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Shimotsuke, Tochigi, Japan
| | - K Sakai
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Shimotsuke, Tochigi, Japan
| | - D Yamamuro
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Shimotsuke, Tochigi, Japan
| | - S Nagasaka
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Shimotsuke, Tochigi, Japan
| | - H Tamemoto
- Division of Medical Biochemistry, Department of Biochemistry, School of Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - S Ishibashi
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Shimotsuke, Tochigi, Japan
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Itano M, Yamazaki T, Yamashita M, Ishibashi S, Higuchi Y, Kosaka M, Kobayashi N, Tachibana H. SU-E-T-455: Impact of Different Independent Dose Verification Software Programs for Secondary Check. Med Phys 2015. [DOI: 10.1118/1.4924817] [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: 11/07/2022] Open
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26
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Ishibashi S, Okamoto Y, Koyama C, Yajima Y, Noda A, Kawada, M. Enomoto K, Miyamoto M, Fujimoto A, Ishikawa Y. Two Cases of Mandibular Fractures in Child Treated by Open Reduction and Internal Fixation with a Titanium plate. J Oral Maxillofac Surg 2014. [DOI: 10.1016/j.joms.2014.06.410] [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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Seo H, Ishibashi S, Brown SE. Seo et al. reply:. Phys Rev Lett 2014; 113:029702. [PMID: 25062247 DOI: 10.1103/physrevlett.113.029702] [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] [Received: 05/08/2014] [Indexed: 06/03/2023]
Affiliation(s)
- H Seo
- Condensed Matter Theory Laboratory and CEMS Quantum Matter Theory Research Team, RIKEN, Saitama 351-0198, Japan
| | - S Ishibashi
- Nanosystem Research Institute "RICS", AIST, Ibaraki 305-8568, Japan
| | - S E Brown
- Department of Physics and Astronomy, UCLA, California 90095, USA
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Miwa S, Ishibashi S, Tomita H, Nozaki T, Tamura E, Ando K, Mizuochi N, Saruya T, Kubota H, Yakushiji K, Taniguchi T, Imamura H, Fukushima A, Yuasa S, Suzuki Y. Highly sensitive nanoscale spin-torque diode. Nat Mater 2014; 13:50-56. [PMID: 24141450 DOI: 10.1038/nmat3778] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Accepted: 09/14/2013] [Indexed: 06/02/2023]
Abstract
Highly sensitive microwave devices that are operational at room temperature are important for high-speed multiplex telecommunications. Quantum devices such as superconducting bolometers possess high performance but work only at low temperature. On the other hand, semiconductor devices, although enabling high-speed operation at room temperature, have poor signal-to-noise ratios. In this regard, the demonstration of a diode based on spin-torque-induced ferromagnetic resonance between nanomagnets represented a promising development, even though the rectification output was too small for applications (1.4 mV mW(-1)). Here we show that by applying d.c. bias currents to nanomagnets while precisely controlling their magnetization-potential profiles, a much greater radiofrequency detection sensitivity of 12,000 mV mW(-1) is achievable at room temperature, exceeding that of semiconductor diode detectors (3,800 mV mW(-1)). Theoretical analysis reveals essential roles for nonlinear ferromagnetic resonance, which enhances the signal-to-noise ratio even at room temperature as the size of the magnets decreases.
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Affiliation(s)
- S Miwa
- 1] Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan [2]
| | - S Ishibashi
- 1] Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan [2] National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan [3]
| | - H Tomita
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - T Nozaki
- 1] Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan [2] National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
| | - E Tamura
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - K Ando
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - N Mizuochi
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - T Saruya
- 1] National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan [2]
| | - H Kubota
- National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
| | - K Yakushiji
- National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
| | - T Taniguchi
- National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
| | - H Imamura
- National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
| | - A Fukushima
- National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
| | - S Yuasa
- National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
| | - Y Suzuki
- 1] Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan [2] National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
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Iwasawa E, Ishibashi S, Miki K, Yoshino Y, Nemoto S, Mizusawa H. Teaching NeuroImages: Reversible cognitive impairment with bithalamic lesions caused by a dural arteriovenous fistula. Neurology 2013; 81:e38-9. [DOI: 10.1212/wnl.0b013e31829e6f4a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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30
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Sone H, Tanaka S, Tanaka S, Suzuki S, Seino H, Hanyu O, Sato A, Toyonaga T, Okita K, Ishibashi S, Kodama S, Akanuma Y, Yamada N. Leisure-time physical activity is a significant predictor of stroke and total mortality in Japanese patients with type 2 diabetes: analysis from the Japan Diabetes Complications Study (JDCS). Diabetologia 2013; 56:1021-30. [PMID: 23443242 DOI: 10.1007/s00125-012-2810-z] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [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: 04/29/2012] [Accepted: 11/29/2012] [Indexed: 10/27/2022]
Abstract
AIMS/HYPOTHESIS Our aim was to clarify the association between leisure-time physical activity (LTPA) and cardiovascular events and total mortality in a nationwide cohort of Japanese diabetic patients. METHODS Eligible patients (1,702) with type 2 diabetes (mean age, 58.5 years; 47% women) from 59 institutes were followed for a median of 8.05 years. A comprehensive lifestyle survey including LTPA and occupation was performed using standardised questionnaires. Outcome was occurrence of coronary heart disease (CHD), stroke and total mortality. The adjusted HR and 95% CI were calculated by Cox regression analysis. RESULTS A significant reduction in HR in patients in the top (≥ 15.4 metabolic equivalents [MET] h/week) vs the bottom tertile (≤ 3.7 MET h/week) of LTPA, adjusted by age, sex and diabetes duration, was observed in stroke (HR 0.55, 95% CI 0.32, 0.94) and total mortality (HR 0.49, 95% CI 0.26, 0.91) but not in CHD (HR 0.77, 95% CI 0.48, 1.25). The HR for stroke became borderline significant or nonsignificant after adjustment for lifestyle or clinical variables including diet or serum lipids. The significantly reduced total mortality by LTPA was independent of these variables and seemed not to be, at least mainly, attributed to reduced cardiovascular disease. CONCLUSIONS/INTERPRETATION In Japanese persons with type 2 diabetes, LTPA of 15.4 MET h/week or more was associated with a significantly lower risk of stroke partly through ameliorating combinations of cardiovascular risk factors. It was also associated with significantly reduced total mortality but independently of cardiovascular risk factors or events. These findings, implying differences from Western diabetic populations, should be considered in the clinical management of East Asians with diabetes.
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Affiliation(s)
- H Sone
- Department of Internal Medicine, Niigata University Faculty of Medicine, 1-757 Asahimachi-dori, Chuoh-ku, Niigata 951-8510, Japan.
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Tawara A, Miyamoto R, Tou N, Ishibashi S, Kondo H. A classic temporal optic disc pit showing progression in the corresponding optic nerve fiber and visual field defects. Jpn J Ophthalmol 2012; 57:263-7. [PMID: 23263695 DOI: 10.1007/s10384-012-0225-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Accepted: 11/07/2012] [Indexed: 10/27/2022]
Abstract
PURPOSE We report a rare case with a classic temporal optic disc pit (ODP) showing the progression of an associated nerve fiber layer defect (NFLD) with the corresponding visual field defect (VFD). METHODS We describe the patient's medical records and review the pertinent literature. RESULTS A 54-year-old woman had a temporal ODP, which was considered to be congenital, associated with both NFLD expanded to both the upper and lower sides of the horizontal line and corresponding VFD and a small ODP-like excavation at the 6.5 o'clock position on the disc edge with a narrow NFLD OD. During the 5-year follow-up period, both the NFLD and VFD associated with the temporal pit progressed without serous retinal detachment. The small ODP-like excavation located at the 6.5 o'clock position also showed progressive NFLD in the temporal lower quadrant with advanced VFD, which suggested that the excavation might be associated with glaucoma. CONCLUSION Based on the observation that the VFD occupied the two temporal quadrants with no step, an NFLD with corresponding VFD associated with a classic temporal ODP, although not considered to be related to glaucoma, can progress.
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Affiliation(s)
- Akihiko Tawara
- Department of Ophthalmology, School of Medicine, University of Occupational and Environmental Health, Japan, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu 807-8555, Japan.
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Ogata R, Suzuki S, Ahn JK, Akune Y, Baranov V, Chen KF, Comfort J, Doroshenko M, Fujioka Y, Hsiung YB, Inagaki T, Ishibashi S, Ishihara N, Ishii H, Iwai E, Iwata T, Kato I, Kobayashi S, Komatsu S, Komatsubara TK, Kurilin AS, Kuzmin E, Lednev A, Lee HS, Lee SY, Lim GY, Ma J, Matsumura T, Moisseenko A, Morii H, Morimoto T, Nakajima Y, Nakano T, Nanjo H, Nishi N, Nix J, Nomura T, Nomachi M, Okuno H, Omata K, Perdue GN, Perov S, Podolsky S, Porokhovoy S, Sakashita K, Sasaki T, Sasao N, Sato H, Sato T, Sekimoto M, Shimogawa T, Shinkawa T, Stepanenko Y, Sugaya Y, Sugiyama A, Sumida T, Tajima Y, Takita S, Tsamalaidze Z, Tsukamoto T, Tung YC, Wah YW, Watanabe H, Wu ML, Yamaga M, Yamanaka T, Yoshida HY, Yoshimura Y, Zheng Y. Study of theKL0→π0π0νν¯decay. Int J Clin Exp Med 2011. [DOI: 10.1103/physrevd.84.052009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Tomita T, Sakurai Y, Ishibashi S, Maru Y. Imbalance of Clara cell-mediated homeostatic inflammation is involved in lung metastasis. Oncogene 2011; 30:3429-39. [PMID: 21399660 DOI: 10.1038/onc.2011.53] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We have previously shown that tumor necrosis factor (TNF)α produced from primary tumor-induced expression of two endogenous Toll-like receptor 4 (TLR4) ligands, S100A8 and serum amyloid A3 (SAA3), in pre-metastatic lungs. However, mechanistic details of the signaling network and relevance to pulmonary physiology are poorly understood. Here, we identify Clara cells as a control tower of the network. Clara cell ablation by naphthalene suppressed pulmonary recruitment of CD11b+TLR4+ cells and spontaneous lung metastasis. Clara cells turned out to express TLR4 through which SAA3 was auto-amplified. Reciprocal bone marrow transplantation between wild-type and TLR4 knockout mice demonstrated that pulmonary TLR4+ Clara cells could be derived from bone marrow. SAA3-induced TNFα expression in both alveolar type II cells and macrophages. Primary co-cultures of alveolar type II cells and Clara cells revealed that the induction of TNFα in alveolar type II cells was dependent on the Clara cell-mediated amplification of SAA3. SAA3 induction by bacterial endotoxin also required both Clara cells and TLR4. Thus, pulmonary metastatic soil may feature deregulation of homeostatic inflammatory responses to constant assaults of microbes with endotoxin.
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Affiliation(s)
- T Tomita
- Department of Pharmacology, Tokyo Women's Medical University, Tokyo, Japan
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Tung YC, Hsiung YB, Ahn JK, Akune Y, Baranov V, Chen KF, Comfort J, Doroshenko M, Fujioka Y, Inagaki T, Ishibashi S, Ishihara N, Ishii H, Iwai E, Iwata T, Kato I, Kobayashi S, Komatsu S, Komatsubara TK, Kurilin AS, Kuzmin E, Lednev A, Lee HS, Lee SY, Lim GY, Ma J, Matsumura T, Moisseenko A, Morii H, Morimoto T, Nakajima Y, Nakano T, Nanjo H, Nishi N, Nix J, Nomura T, Nomachi M, Ogata R, Okuno H, Omata K, Perdue GN, Perov S, Podolsky S, Porokhovoy S, Sakashita K, Sasaki T, Sasao N, Sato H, Sato T, Sekimoto M, Shimogawa T, Shinkawa T, Stepanenko Y, Sugaya Y, Sugiyama A, Sumida T, Suzuki S, Tajima Y, Takita S, Tsamalaidze Z, Tsukamoto T, Wah Y, Watanabe H, Wu ML, Yamaga M, Yamanaka T, Yoshida HY, Yoshimura Y, Zheng Y. Search for the decayKL0→3γ. Int J Clin Exp Med 2011. [DOI: 10.1103/physrevd.83.031101] [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: 11/07/2022]
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Ishibashi S. Angiographic Changes in Iris and Iridocorneal Angle Neovascularization After Intravitreal Bevacizumab Injection. ACTA ACUST UNITED AC 2010; 128:1539-45. [DOI: 10.1001/archophthalmol.2010.282] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Ahn JK, Akune Y, Baranov V, Chen KF, Comfort J, Doroshenko M, Fujioka Y, Hsiung YB, Inagaki T, Ishibashi S, Ishihara N, Ishii H, Iwai E, Iwata T, Kato I, Kobayashi S, Komatsu S, Komatsubara TK, Kurilin AS, Kuzmin E, Lednev A, Lee HS, Lee SY, Lim GY, Ma J, Matsumura T, Moisseenko A, Morii H, Morimoto T, Nakajima Y, Nakano T, Nanjo H, Nishi N, Nix J, Nomura T, Nomachi M, Ogata R, Okuno H, Omata K, Perdue GN, Perov S, Podolsky S, Porokhovoy S, Sakashita K, Sasaki T, Sasao N, Sato H, Sato T, Sekimoto M, Shimogawa T, Shinkawa T, Stepanenko Y, Sugaya Y, Sugiyama A, Sumida T, Suzuki S, Tajima Y, Takita S, Tsamalaidze Z, Tsukamoto T, Tung YC, Wah YW, Watanabe H, Wu ML, Yamaga M, Yamanaka T, Yoshida HY, Yoshimura Y, Zheng Y. Experimental study of the decayKL0→π0νν¯. Int J Clin Exp Med 2010. [DOI: 10.1103/physrevd.81.072004] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Sone H, Tanaka S, Iimuro S, Tanaka S, Oida K, Yamasaki Y, Oikawa S, Ishibashi S, Katayama S, Yamashita H, Ito H, Yoshimura Y, Ohashi Y, Akanuma Y, Yamada N. Long-term lifestyle intervention lowers the incidence of stroke in Japanese patients with type 2 diabetes: a nationwide multicentre randomised controlled trial (the Japan Diabetes Complications Study). Diabetologia 2010; 53:419-28. [PMID: 20054522 PMCID: PMC2815795 DOI: 10.1007/s00125-009-1622-2] [Citation(s) in RCA: 112] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2009] [Accepted: 10/21/2009] [Indexed: 11/28/2022]
Abstract
AIMS/HYPOTHESIS The aim of the study was to clarify whether a therapeutic intervention focused on lifestyle modification affected the incidence of vascular complications in patients with established diabetes. METHODS A total of 2,033 eligible Japanese men and women aged 40-70 years with type 2 diabetes from 59 institutes were randomised to a conventional treatment group (CON), which continued to receive the usual care, and a lifestyle intervention group (INT), which received education on lifestyle modification regarding dietary habits, physical activities and adherence to treatment by telephone counselling and at each outpatient clinic visit, in addition to the usual care. Randomisation and open-label allocation were done by a central computer system. Primary analysis regarding measurements of control status and occurrence of macro- and microvascular complications was based on 1,304 participants followed for an 8 year period. RESULTS Although status of control of most classic cardiovascular risk factors, including body weight, glycaemia, serum lipids and BP, did not differ between groups during the study period, the incidence of stroke in the INT group (5.48/1,000 patient-years) was significantly lower than in the CON group (9.52/1,000 patient-years) by Kaplan- Meier analysis (p=0.02 by logrank test) and by multivariate Cox analysis (HR 0.62, 95% CI 0.39-0.98, p=0.04). The incidence of CHD, retinopathy and nephropathy did not differ significantly between groups. Lipoprotein(a) was another significant independent risk factor for stroke. CONCLUSIONS/INTERPRETATION These findings suggest that lifestyle modification had limited effects on most typical control variables, but did have a significant effect on stroke incidence in patients with established type 2 diabetes. CLINICAL TRIAL REGISTRATION UMIN-CTR C000000222 FUNDING The Ministry of Health, Labour and Welfare, Japan
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Affiliation(s)
- H. Sone
- Department of Internal Medicine, University of Tsukuba Institute of Clinical Medicine, 1-1-1 Tennodai, Tsukuba, Ibaraki Japan 305-8575
| | - S. Tanaka
- Laboratory of Biostatistics, Tokyo University of Science, Tokyo, Japan
| | - S. Iimuro
- Department of Biostatistics, University of Tokyo School of Medicine, Tokyo, Japan
| | - S. Tanaka
- Translational Research Center, Kyoto University, Kyoto, Japan
| | - K. Oida
- Fukui Chuo Clinic, Fukui, Japan
| | - Y. Yamasaki
- Center for Advanced Science and Innovation, Osaka University, Osaka, Japan
| | - S. Oikawa
- Department of Medicine, Nippon Medical School, Tokyo, Japan
| | - S. Ishibashi
- Department of Endocrinology and Metabolism, Jichi Medical College, Tochigi, Japan
| | - S. Katayama
- The Fourth Department of Medicine, Saitama Medical School, Saitama, Japan
| | - H. Yamashita
- Department of Ophthalmology, Yamagata University School of Medicine, Yamagata, Japan
| | - H. Ito
- Tokyo Metropolitan Geriatric Hospital, Tokyo, Japan
| | - Y. Yoshimura
- Department of Nutrition, Shikoku University, Tokushima, Japan
| | - Y. Ohashi
- Department of Biostatistics, University of Tokyo School of Medicine, Tokyo, Japan
| | - Y. Akanuma
- The Institute for Adult Diseases, Asahi Life Foundation, Tokyo, Japan
| | - N. Yamada
- Department of Internal Medicine, University of Tsukuba Institute of Clinical Medicine, 1-1-1 Tennodai, Tsukuba, Ibaraki Japan 305-8575
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Nakayama K, Bayasgalan T, Yamanaka K, Kumada M, Gotoh T, Utsumi N, Yanagisawa Y, Okayama M, Kajii E, Ishibashi S, Iwamoto S. Large scale replication analysis of loci associated with lipid concentrations in a Japanese population. J Med Genet 2009; 46:370-4. [PMID: 19487539 DOI: 10.1136/jmg.2008.064063] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Recent genome wide association studies discovered seven novel loci that influence plasma concentrations of triglycerides, high density lipoprotein (HDL) and low density lipoprotein (LDL) cholesterol in Europeans. To date, large scale replication studies using populations with known differences in genome-wide linkage disequilibrium (LD) pattern have not been undertaken. METHODS To address this issue, we tested associations between single nucleotide polymorphisms (SNPs) within the seven novel loci and plasma lipid profiles in 21 010 Japanese individuals. RESULTS Multiple linear regression analyses showed that the rs3812316 in MLXIPL was strongly associated with triglyceride concentrations (p approximately 3.0x10(-11), 7.1 mg/dl decrease per minor C allele) and that rs599839 in CELSR2/PSRC1/SORT1 was strongly associated with LDL cholesterol concentrations (p approximately 3.1x10(-11), 4.7 mg/dl decrease per minor G allele) in the Japanese population. SNPs near ANGPTL3, TRIB1 and GALNT2 showed evidence for associations with triglyceride concentrations (3.6x10(-6)<p<5.1x10(-5)). SNP near TRIB1 showed association with LDL cholesterol concentrations (p approximately 1.2x10(-5)). On the other hand, SNPs in NCAN/CILP2/PBX4 and MVK/MMAB were not associated with any plasma lipid profiles in the Japanese population. Ethnic differences in LD pattern would explain the lack of association between these two loci and plasma lipid concentrations in the Japanese population. CONCLUSION Associations between the novel loci and plasma lipid concentrations were generally conserved in the Japanese population, with the exception of NCAN/CILP2/PBX4 and MVK/MMAB.
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Affiliation(s)
- K Nakayama
- Division of Human Genetics, Center for Community Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke-city, Tochigi, 329-0498 Japan.
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Tung YC, Hsiung YB, Wu ML, Chen KF, Ahn JK, Akune Y, Baranov V, Comfort J, Doroshenko M, Fujioka Y, Inagaki T, Ishibashi S, Ishihara N, Ishii H, Iwai E, Iwata T, Kato I, Kobayashi S, Komatsubara TK, Kurilin AS, Kuzmin E, Lednev A, Lee HS, Lee SY, Lim GY, Ma J, Matsumura T, Moisseenko A, Morii H, Morimoto T, Nakano T, Nanjo H, Nix J, Nomura T, Nomachi M, Ogata R, Okuno H, Omata K, Perdue GN, Podolsky S, Sakashita K, Sasaki T, Sasao N, Sato H, Sato T, Sekimoto M, Shinkawa T, Sugaya Y, Sugiyama A, Sumida T, Suzuki S, Tajima Y, Takita S, Tsamalaidze Z, Tsukamoto T, Wah Y, Watanabe H, Yamaga M, Yamanaka T, Yoshida HY, Yoshimura Y, Zheng Y. Search for a light pseudoscalar particle in the decay K_{L};{0}-->pi;{0}pi;{0}X. Phys Rev Lett 2009; 102:051802. [PMID: 19257503 DOI: 10.1103/physrevlett.102.051802] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2008] [Indexed: 05/27/2023]
Abstract
We performed a search for a light pseudoscalar particle X in the decay K_{L};{0}-->pi;{0}pi;{0}X, X-->gammagamma with the E391a detector at KEK. Such a particle with a mass of 214.3 MeV/c;{2} was suggested by the HyperCP experiment. We found no evidence for X and set an upper limit on the product branching ratio for K_{L};{0}-->pi;{0}pi;{0}X, X-->gammagamma of 2.4x10;{-7} at the 90% confidence level. Upper limits on the branching ratios in the mass region of X from 194.3 to 219.3 MeV/c;{2} are also presented.
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Affiliation(s)
- Y C Tung
- Department of Physics, National Taiwan University, Taipei, Taiwan
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Kubota T, Nagata T, Tawara A, Okada H, Ishibashi S, Yamashita M, Harada Y, Yanase M. Influence of IOP measurement through the wrong eyepiece of the slit lamp on Goldmann applanation tonometry. Eur J Ophthalmol 2008; 18:910-4. [PMID: 18988161 DOI: 10.1177/112067210801800609] [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: 11/16/2022]
Abstract
PURPOSE This study examined whether intraocular pressure (IOP) measurements through the wrong eyepiece of the slit lamp may be a source of error. METHODS Seven skilled observers measured the IOP from seven healthy subjects. The observers used a Haag-Streit Goldmann applanation tonometer with two types of slit lamps (Haag-Streit and Rodenstock). In the Haag-Streit slit lamp the prism of the tonometer is aligned with the right part of the slit lamp optics. Conversely, in the Rodenstock slit lamp, the prism is aligned with the left. Each observer measured the IOP of each subject through the right eyepiece, through the left eyepiece, and under binocular vision. RESULTS The IOP measured with the left eyepiece of the Haag-Streit slit lamp was significantly higher than that measured with the right eyepiece and binocular vision. The IOP measured with the right eyepiece of the Rodenstock slit lamp was significantly higher than that measured with the left eyepiece and binocular vision. CONCLUSIONS IOP measurement through the wrong eyepiece of the slit lamp may be a source of error.
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Affiliation(s)
- T Kubota
- Department of Ophthalmology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu - Japan.
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Kusaka I, Nagasaka S, Horie H, Ishibashi S. Metformin, but not pioglitazone, decreases postchallenge plasma ghrelin levels in type 2 diabetic patients: a possible role in weight stability? Diabetes Obes Metab 2008; 10:1039-46. [PMID: 18355332 DOI: 10.1111/j.1463-1326.2008.00857.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [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] [Indexed: 11/28/2022]
Abstract
AIM Effects of metformin and pioglitazone on body weight are clearly different. Recently, the role of ghrelin, an orexigenic peptide derived from stomach, has been appreciated. Plasma ghrelin levels display a preprandial peak and postprandial suppression, suggesting its physiological role. We hypothesized that metformin or pioglitazone may modulate circulating ghrelin levels and this modulation may be related to differential effects on body weight with these agents. METHODS Thirty-five Japanese type 2 diabetic patients [21 men and 14 women, age 62 +/- 2 years, body mass index (BMI) 26.6 +/- 0.5 kg/m(2) and haemoglobin A1c (HbA1c) 8.2 +/- 0.1%, mean +/- s.e.] were randomly assigned to groups for the addition of metformin or pioglitazone. At baseline and 4 months later, a 75-g oral glucose tolerance test (OGTT) was performed to measure plasma ghrelin levels. RESULTS In 33 subjects who completed the study, the overall decrease in HbA1c ( approximately 1%) was comparable between the two groups. As expected, BMI increased in the pioglitazone group but not in the metformin group. After the treatment, plasma ghrelin levels at each point of OGTT remained unchanged in the pioglitazone group. In the metformin group, fasting ghrelin levels were unaltered, whereas the absolute levels at 30, 60 and 120 min decreased significantly. The area under the curve for the 2-h ghrelin profile also decreased significantly. CONCLUSIONS Metformin, but not pioglitazone, decreased plasma ghrelin levels after the glucose load. This decrease may in part account for weight stability in type 2 diabetic patients treated with metformin.
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Affiliation(s)
- I Kusaka
- Division of Endocrinology and Metabolism, Department of Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
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Naka K, Narita A, Tanaka H, Chujo Y, Morita M, Inubushi T, Nishimura I, Hiruta J, Shibayama H, Koga M, Ishibashi S, Seki J, Kizaka-Kondoh S, Hiraoka M. Biomedical applications of imidazolium cation-modified iron oxide nanoparticles. POLYM ADVAN TECHNOL 2008. [DOI: 10.1002/pat.1218] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Ahn JK, Akune Y, Baranov V, Chen KF, Comfort J, Doroshenko M, Fujioka Y, Hsiung YB, Inagaki T, Ishibashi S, Ishihara N, Ishii H, Iwai E, Iwata T, Kato I, Kobayashi S, Komatsubara TK, Kurilin AS, Kuzmin E, Lednev A, Lee HS, Lee SY, Lim GY, Ma J, Matsumura T, Moisseenko A, Morii H, Morimoto T, Nakano T, Nanjo H, Nix J, Nomura T, Nomachi M, Okuno H, Omata K, Perdue GN, Podolsky S, Sakashita K, Sasaki T, Sasao N, Sato H, Sato T, Sekimoto M, Shinkawa T, Sugaya Y, Sugiyama A, Sumida T, Suzuki S, Tajima Y, Takita S, Tsamalaidze Z, Tsukamoto T, Tung YC, Wah YW, Watanabe H, Wu ML, Yamaga M, Yamanaka T, Yoshida HY, Yoshimura Y. Search for the Decay K L0-->pi0nu nu[over]. Phys Rev Lett 2008; 100:201802. [PMID: 18518524 DOI: 10.1103/physrevlett.100.201802] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2007] [Indexed: 05/26/2023]
Abstract
We performed a search for the K L0-->pi0nu nu[over] decay at the KEK 12-GeV proton synchrotron. No candidate events were observed. An upper limit on the branching ratio for the decay was set to be 6.7 x 10(-8) at the 90% confidence level.
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Affiliation(s)
- J K Ahn
- Department of Physics, Pusan National University, Busan 609-735, Republic of Korea
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Ogata H, Tokuyama K, Nagasaka S, Ando A, Kusaka I, Sato N, Goto A, Ishibashi S, Kiyono K, Struzik ZR, Yamamoto Y. Long-range correlated glucose fluctuations in diabetes. Methods Inf Med 2007; 46:222-6. [PMID: 17347760] [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: 05/14/2023]
Abstract
OBJECTIVES Our objective is to investigate diabetes-related alteration of glucose control in diurnal fluctuations in normal daily life by detrended fluctuation analysis (DFA). METHODS The fluctuations of glucose of 12 non-diabetic subjects and 15 diabetic patients were measured using a continuous glucose monitoring system (CGMS) over a period of one day. The glucose data was calculated by the DFA method, which is capable of revealing the presence of long-range correlations in time series with inherent non-stationarity. RESULTS Compared with the non-diabetic subjects, the mean glucose level and the standard deviation are significantly higher in the diabetic group. The DFA exponent alpha is calculated, and glucose time series are searched for the presence of negatively (0.5 < alpha < 1.5) or positively (1.5 < alpha) correlated fluctuations. A crossover phenomenon, i.e. a change in the level of correlations, is observed in the non-diabetic subjects at about two hours; the net effects of glucose flux/reflux causing temporal changes in glucose concentration are negatively correlated in a "long-range" (> two hours) regime. However, for diabetic patients, the DFA exponent alpha = 1.65 +/- 0.30, and in the same regime positively correlated fluctuations are observed, suggesting that the net effects of the flux and reflux persist for many hours. CONCLUSIONS Such long-range positive correlation in glucose homeostasis may reflect pathogenic mechanisms of diabetes, i.e., the lack of the tight control in blood glucose regulation. Using modern time series analysis methods such as DFA, continuous evaluation of glucose dynamics could promote better diagnoses and prognoses of diabetes and a better understanding of the fundamental mechanism of glucose dysregulation in diabetes.
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Affiliation(s)
- H Ogata
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Japan
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Muroi R, Yagyu H, Kobayashi H, Nagata M, Sato N, Ideno J, Fujita N, Ando A, Okada K, Takiyama Y, Nagasaka S, Miyajima H, Nakano I, Ishibashi S. Early onset insulin-dependent diabetes mellitus as an initial manifestation of aceruloplasminaemia. Diabet Med 2006; 23:1136-9. [PMID: 16978380 DOI: 10.1111/j.1464-5491.2006.01883.x] [Citation(s) in RCA: 11] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND Aceruloplasminaemia is an autosomal recessive disorder caused by specific mutations in the ceruloplasmin gene. Aceruloplasminaemia is clinically characterized by diabetes mellitus, pigment degeneration of the retina, and neurological abnormalities, such as cerebellar ataxia, extrapyramidal signs, and dementia. We present a patient with aceruloplasminaemia who, until progressive neurological abnormalities were noticed, had been treated for more than 30 years as having Type 1 diabetes mellitus requiring multiple insulin injection therapy. CASE REPORT The patient was a 58-year-old man. At the age of 23 years, he developed diabetes that required multiple insulin injection therapy. At the age of 39 years, he was commenced on continuous subcutaneous insulin infusion (CSII) therapy. Despite CSII therapy, the patient's blood glucose levels were poorly controlled (HbA(1c), approximately 9.5%). He was diagnosed as having aceruloplasminaemia at 58 years of age when he presented with progressive cerebellar ataxia, extrapyramidal signs of recent onset and pigment degeneration of the retina. CONCLUSIONS It is possible that some diabetic patients with aceruloplasminaemia are mistakenly diagnosed as having Type 1 diabetes mellitus, as they have reduced insulin secretion and develop diabetes at a younger age, before neurological abnormalities associated with aceruloplasminaemia are apparent. Therefore, aceruloplasminaemia should be considered in patients with insulin-dependent diabetes mellitus who develop progressive neurological abnormalities of unknown aetiology along with a microcytic hypochromic anaemia and retinal degeneration.
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Affiliation(s)
- R Muroi
- Division of Neurology, Jichi Medical School, Kawachi, Tochigi, Japan
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Ishibashi S, Hirose N, Tawara A, Kubota T. Effect of Latanoprost on the Diurnal Variations in the Intraocular and Ocular Perfusion Pressure in Normal Tension Glaucoma. J Glaucoma 2006; 15:354-7. [PMID: 16988595 DOI: 10.1097/01.ijg.0000212264.96864.3e] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE To evaluate the effects of latanoprost on the diurnal variations in the intraocular pressure (IOP) combined with the ocular perfusion pressure (OPP) in patients with normal tension glaucoma (NTG). PATIENTS AND METHODS Twenty-two eyes from 22 patients with NTG were used for the study. The diurnal variations in the IOP and blood pressure (BP) were measured every 3 hours without therapy, and then the patients were treated with latanoprost (0.005%) once daily for more than 12 weeks. The diurnal variations in the IOP and BP under medication were again measured every 6 hours. The diurnal variation of IOP for 24 hours, mean diurnal IOP, maximum IOP, minimum IOP, range of variation in IOP, OPP, and BP were compared between the baseline and after treatment by means of a paired t test. RESULTS At 3 months after the start of the latanoprost treatment regimen, the IOP showed a statistically significant decrease at every assessed time point over 24 hours (P<0.001). Latanoprost significantly reduced the mean diurnal IOP, maximum IOP, minimum IOP, and mean range of variation in the IOP values from baseline (P<0.001, <0.001, <0.001, and 0.009, respectively). OPP after treatment showed no significant difference at any assessed time points from the baseline (P>0.1). Latanoprost did not significantly alter the mean diurnal OPP (P>0.1), and BP (P>0.5) from the baseline. CONCLUSIONS Latanoprost was thus found to significantly reduce IOP over 24 hours, whereas it does not affect OPP and BP in NTG patients. Therefore, it may be a useful medication for NTG.
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Affiliation(s)
- Shingo Ishibashi
- Department of Ophthalmology, School of Medicine, University of Occupational and Environmental Health , Kitakyushu, Japan.
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Affiliation(s)
- S. Kobayashi
- a NTT Interdisciplinary Research Laboratories , Nippon Telegraph and Telephone Corporation , Musashino, Tokyo , 180 , Japan
| | - S. Ishibashi
- a NTT Interdisciplinary Research Laboratories , Nippon Telegraph and Telephone Corporation , Musashino, Tokyo , 180 , Japan
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Nakata M, Nagasaka S, Kusaka I, Matsuoka H, Ishibashi S, Yada T. Effects of statins on the adipocyte maturation and expression of glucose transporter 4 (SLC2A4): implications in glycaemic control. Diabetologia 2006; 49:1881-92. [PMID: 16685502 DOI: 10.1007/s00125-006-0269-5] [Citation(s) in RCA: 220] [Impact Index Per Article: 12.2] [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] [Received: 12/31/2005] [Accepted: 03/09/2006] [Indexed: 01/06/2023]
Abstract
AIMS/HYPOTHESIS Hyperlipidaemia often occurs in patients with type 2 diabetes mellitus. Though HMG-CoA reductase inhibitors (statins) are widely used for controlling hypercholesterolemia, atorvastatin has also been reported to have an adverse effect on glucose metabolism. Based on these findings, the aim of this study was to investigate the effects of statins on adipocytes, which play pivotal roles in glucose metabolism. METHODS In 3T3-L1 cells, effects of statins on adipocyte maturation were determined morphologically. Protein and mRNA levels of SLC2A4 and adipocyte marker proteins were determined by immunoblotting and RT-PCR, respectively. Type 2 diabetic NSY mice were treated with atorvastatin for 15 weeks, followed by glucose and insulin tolerance tests and examination of SLC2A4 expression in white adipose tissue (WAT). Seventy-eight Japanese subjects with type 2 diabetes and hypercholesterolaemia were treated with atorvastatin (10 mg/day), and its effects on lipid and glycaemic profiles were measured 12 weeks after treatment initiation. RESULTS Treatment with atorvastatin inhibited adipocyte maturation, SLC2A4 and C/EBPalpha expressions and insulin action in 3T3-L1 cells. Atorvastatin also attenuated SLC2A4 and C/EBPalpha expressions in differentiated 3T3-L1 adipocytes. These effects were reversed by L. mevalonate or geranylgeranyl pyrophosphate. In NSY mice, atorvastatin accelerated glucose intolerance as a result of insulin resistance and decreased SLC2A4 expression in WAT. In addition to improving hyperlipidaemia, atorvastatin treatment significantly increased HbA(1c) but not fasting glucose levels in diabetic patients, and this effect was greater in the non-obese subgroup. CONCLUSIONS/INTERPRETATION These results demonstrate that atorvastatin attenuates adipocyte maturation and SLC2A4 expression by inhibiting isoprenoid biosynthesis, and impairs glucose tolerance. These actions of atorvastatin could potentially affect the control of type 2 diabetes.
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Affiliation(s)
- M Nakata
- Department of Physiology, Division of Integrative Physiology, Jichi Medical University, School of Medicine, Shimotsuke, Tochigi 329-0498, Japan
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Ishibashi S, Kuroiwa T, LiYuan S, Katsumata N, Li S, Endo S, Mizusawa H. Long-term cognitive and neuropsychological symptoms after global cerebral ischemia in Mongolian gerbils. Acta Neurochir Suppl 2006; 96:299-302. [PMID: 16671475 DOI: 10.1007/3-211-30714-1_64] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
The objective of this study was to establish a rodent model of vascular dementia that showed long-term cognitive and neuropsychological deficits, and to correlate those behavioral deficits with the patterns of ischemic lesions, thus providing a platform for future testing of potential therapeutic agents. In Mongolian gerbils, either 5-minute single bilateral common carotid artery occlusion (SBCCAO) or repetitive bilateral common carotid artery occlusion (two 7-minute occlusions, RBCCAO) was induced, and the behavioral deficits were evaluated using 2 tests: a modified open-field test with an escape zone to evaluate changes in anxiety and locomotor activity, and a T-maze test to assess cognitive dysfunction. SBCCAO did not induce anxiety changes but caused transient locomotor hyperactivity and mild cognitive deficits. Only pyramidal neuronal death was found in the bilateral CA1 sector of the hippocampus following SBCCAO. In contrast, RBCCAO induced persistent locomotor hyperactivity, reduced anxiety, and caused severe cognitive deficits at 4 weeks post-ischemia. RBCCAO caused significant atrophy associated with diffuse selective neuronal death in the bilateral cerebral cortex and caudate nucleus, as well as the CA1 region. The repetitive ischemia model appears to be a potentially useful platform for the long-term analysis of cognitive and neuropsychological symptoms associated with vascular dementia.
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Affiliation(s)
- S Ishibashi
- Department of Neurology and Neurological Science, Tokyo Medical and Dental University, Tokyo, Japan
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Katsumata N, Kuroiwa T, Yamada I, Tanaka Y, Ishibashi S, Endo S, Ohno K. Neurological dysfunctions versus apparent diffusion coefficient and T2 abnormality after transient focal cerebral ischemia in Mongolian gerbils. Acta Neurochir Suppl 2006; 96:279-82. [PMID: 16671471 DOI: 10.1007/3-211-30714-1_60] [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] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
We examined temporal profiles of neurological dysfunctions and compared them with apparent diffusion coefficient (ADC) and T2 changes in ischemic cortical regions after transient focal cerebral ischemia in Mongolian gerbils. Mongolian gerbils (n = 7) underwent right common carotid artery occlusion for 20 minutes. Asymmetric motor behavior and unilateral somatosensory dysfunction were quantified by the elevated body swing test and the bilateral asymmetry test at 0, 2, 3, and 8 days after ischemia. The results were compared to the ADC and T2 changes in the primary motor cortex and the somatosensory cortex. Transient motor dysfunction was observed at day 2 after ischemia. MRI revealed transient and mild ADC decrease without T2 increase at day 2 after ischemia in the primary motor cortex. Persistent somatosensory dysfunction was observed at 2, 3, and 8 days after ischemia, which corresponded to a moderate ADC decrease, and a mild T2 increase in the primary somatosensory cortex at days 2 and 3 after ischemia. Time profiles of neurological deficits concurred with ADC changes of the post-ischemic cortex responsible for the deficits. The post-ischemic lesions responsible for the neurological deficits were detectable by using ADC mapping in the acute phase after transient focal cerebral ischemia.
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Affiliation(s)
- N Katsumata
- Department of Neuropathology, Tokyo Medical and Dental University, Tokyo, Japan
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