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Sakurai Y, Kubota N, Takamoto I, Wada N, Aihara M, Hayashi T, Kubota T, Hiraike Y, Sasako T, Nakao H, Aiba A, Chikaoka Y, Kawamura T, Kadowaki T, Yamauchi T. Overexpression of UBE2E2 in Mouse Pancreatic β-Cells Leads to Glucose Intolerance via Reduction of β-Cell Mass. Diabetes 2024; 73:474-489. [PMID: 38064504 DOI: 10.2337/db23-0150] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 12/03/2023] [Indexed: 02/22/2024]
Abstract
Genome-wide association studies have identified several gene polymorphisms, including UBE2E2, associated with type 2 diabetes. Although UBE2E2 is one of the ubiquitin-conjugating enzymes involved in the process of ubiquitin modifications, the pathophysiological roles of UBE2E2 in metabolic dysfunction are not yet understood. Here, we showed upregulated UBE2E2 expression in the islets of a mouse model of diet-induced obesity. The diabetes risk allele of UBE2E2 (rs13094957) in noncoding regions was associated with upregulation of UBE2E2 mRNA in the human pancreas. Although glucose-stimulated insulin secretion was intact in the isolated islets, pancreatic β-cell-specific UBE2E2-transgenic (TG) mice exhibited reduced insulin secretion and decreased β-cell mass. In TG mice, suppressed proliferation of β-cells before the weaning period and while receiving a high-fat diet was accompanied by elevated gene expression levels of p21, resulting in decreased postnatal β-cell mass expansion and compensatory β-cell hyperplasia, respectively. In TG islets, proteomic analysis identified enhanced formation of various types of polyubiquitin chains, accompanied by increased expression of Nedd4 E3 ubiquitin protein ligase. Ubiquitination assays showed that UBE2E2 mediated the elongation of ubiquitin chains by Nedd4. The data suggest that UBE2E2-mediated ubiquitin modifications in β-cells play an important role in regulating glucose homeostasis and β-cell mass.
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Affiliation(s)
- Yoshitaka Sakurai
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Naoto Kubota
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
- Department of Metabolic Medicine, Faculty of Life Science, Kumamoto University, Kumamoto, Japan
- Clinical Nutrition Program, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
| | - Iseki Takamoto
- Department of Metabolism and Endocrinology, Ibaraki Medical Center, Tokyo Medical University, Tokyo, Japan
| | - Nobuhiro Wada
- Department of Anatomy I, School of Medicine, Sapporo Medical University, Sapporo, Japan
| | - Masakazu Aihara
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Takanori Hayashi
- Clinical Nutrition Program, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
| | - Tetsuya Kubota
- Clinical Nutrition Program, National Institutes of Biomedical Innovation, Health and Nutrition, Osaka, Japan
- Division of Diabetes and Metabolism, Institute of Medical Science, Asahi Life Foundation, Tokyo, Japan
| | - Yuta Hiraike
- Division for Health Service Promotion, The University of Tokyo, Tokyo, Japan
| | - Takayoshi Sasako
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Harumi Nakao
- Laboratory of Animal Resources, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Atsu Aiba
- Laboratory of Animal Resources, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yoko Chikaoka
- Isotope Science Center, The University of Tokyo, Tokyo, Japan
| | | | | | - Toshimasa Yamauchi
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
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Aihara M, Hayashi T, Koizumi C, Sakurai Y, Sawada M, Kubota T, Kadowaki T, Yamauchi T, Kubota N. Bi-weekly Glycated Albumin Measurement was Useful to Encourage Behavioral Changes in People with Type 2 Diabetes Mellitus. Diabetes Ther 2023; 14:1711-1721. [PMID: 37568043 PMCID: PMC10499715 DOI: 10.1007/s13300-023-01452-y] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 07/13/2023] [Indexed: 08/13/2023] Open
Abstract
INTRODUCTION Hemoglobin A1c (HbA1c), representing the average blood glucose over 1-2 months, is the most commonly used glycemic marker in people with diabetes. Glycated albumin (GA) reflects the average blood glucose over the most recent 1-2 weeks. We considered whether the faster response of GA compared with HbA1c could make people with diabetes realize their glycemic control intuitively and effectively. METHODS We randomized 61 people with diabetes into the control and intervention groups. Blood samples were collected from both every fortnight over an 8-week period (five times; visit 1-5). Only the intervention group was notified of the GA levels on the same day. At the beginning and end of the study, International Physical Activity Questionnaire and Eating Behavior Questionnaire assessments, and body composition measurements were conducted. RESULTS The body weight change was significantly lower in the intervention group at visit 2 and visit 5. The percent body fat change was lower, while the percent skeletal muscle mass change at visit 5 was higher in the intervention group. Increasing GA trend was observed in the control group, but not in the intervention group. The fasting plasma glucose and HbA1c changes at visit 5 were similar in the two groups. Physical activity level change tended to be higher in the intervention group. The YN Eating Behavior Questionnaire score changes were similar in the two groups. CONCLUSION Bi-weekly GA measurement over an 8-week period in people with type 2 diabetes induced behavioral changes. Development of this method is expected to improve diabetes management. TRIAL REGISTRATION UMIN000037795.
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Affiliation(s)
- Masakazu Aihara
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Takanori Hayashi
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
- Department of Clinical Nutrition, Health and Nutrition (NIBIOHN), National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Tokyo, Japan
| | - Chie Koizumi
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Yoshitaka Sakurai
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Mika Sawada
- Department of Clinical Nutrition Therapy, The University of Tokyo Hospital, Tokyo, Japan
| | - Tetsuya Kubota
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
- Department of Clinical Nutrition, Health and Nutrition (NIBIOHN), National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Tokyo, Japan
- Division of Diabetes and Metabolism, The Institute of Medical Science, Asahi Life Foundation, Tokyo, Japan
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan
- Division of Cardiovascular Medicine, Toho University, Ohashi Hospital, Tokyo, Japan
| | | | - Toshimasa Yamauchi
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Naoto Kubota
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.
- Department of Clinical Nutrition, Health and Nutrition (NIBIOHN), National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Tokyo, Japan.
- Department of Clinical Nutrition Therapy, The University of Tokyo Hospital, Tokyo, Japan.
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Ohkuma K, Sawada M, Aihara M, Doi S, Sekine R, Usami S, Ohe K, Kubota N, Yamauchi T. Impact of the COVID-19 pandemic on the glycemic control in people with diabetes mellitus: A retrospective cohort study. J Diabetes Investig 2023. [PMID: 37118898 PMCID: PMC10360387 DOI: 10.1111/jdi.14021] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 04/04/2023] [Accepted: 04/07/2023] [Indexed: 04/30/2023] Open
Abstract
AIM To investigate the impact of the COVID-19 pandemic and its preventive measures on the glycemic and lipid control in people with diabetes mellitus (DM). MATERIALS AND METHODS We conducted this retrospective cohort study from April 2019 to March 2021; we termed the period from April 2019 to March 2020 as the pre-COVID-19 period, and the period from April 2020 to March 2021 as the COVID-19 period, and divided each of these two periods into four quarters. RESULTS In the 1st quarter of the COVID period, when the Japanese government declared the first public health emergency, 3,465 people with diabetes mellitus were receiving treatment, which was 10.4% lower than that in the pre-COVID period. The annual mean HbA1c level was significantly elevated in the COVID-19 period. The annual mean total cholesterol (TC) and triglyceride (TG) levels were also significantly higher in the COVID-19 period. Although there were no significant differences in the glycemic control or annual medication between the two periods in people with type 1 diabetes mellitus, the annual mean HbA1c, TC, and TG levels were significantly higher in the COVID-19 period in people with type 2 diabetes mellitus. Furthermore, a significant increase in the percentage of prescriptions for glinides, biguanides, sodium-glucose cotransporter 2 inhibitors, and glucagon-like peptide-1 receptor agonists for people with type 2 diabetes mellitus was observed in the COVID period. CONCLUSIONS It appears from our study that COVID-19 and its preventive measures had a negative impact on the glycemic and lipid control in people with diabetes mellitus.
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Affiliation(s)
- Kanako Ohkuma
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Mika Sawada
- Department of Clinical Nutrition Therapy, The University of Tokyo Hospital, Tokyo, Japan
| | - Masakazu Aihara
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Shunsuke Doi
- Department of Healthcare and Information Management, University of Tokyo Hospital, Tokyo, Japan
| | - Rie Sekine
- Department of Clinical Nutrition Therapy, The University of Tokyo Hospital, Tokyo, Japan
| | - Satoshi Usami
- Graduate School of Education, The University of Tokyo, Tokyo, Japan
| | - Kazuhiko Ohe
- Department of Healthcare and Information Management, University of Tokyo Hospital, Tokyo, Japan
| | - Naoto Kubota
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- Department of Clinical Nutrition Therapy, The University of Tokyo Hospital, Tokyo, Japan
| | - Toshimasa Yamauchi
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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Aihara M, Jinnouchi H, Yoshida A, Ijima H, Sakurai Y, Hayashi T, Koizumi C, Kubota T, Usami S, Yamauchi T, Sakata T, Kadowaki T, Kubota N. Evaluation of glycated albumin levels in tears and saliva as a marker in patients with diabetes mellitus. Diabetes Res Clin Pract 2023; 199:110637. [PMID: 36963507 DOI: 10.1016/j.diabres.2023.110637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 03/13/2023] [Accepted: 03/16/2023] [Indexed: 03/26/2023]
Abstract
AIMS Glycated albumin (GA) is a biomarker, whose level reflects glycemic control status over the previous 2 weeks. To develop a non-invasive method for evaluating glycemic control in people with diabetes mellitus, we investigated the measurement of GA levels in tears and saliva, which could be collected noninvasively. METHODS Tear and saliva samples were collected from 48 participants with diabetes mellitus. The GA levels in the tear and saliva specimens were measured by Liquid Chromatography-Mass Spectrometry (LC-MS/MS). RESULTS GA levels in both tear and saliva samples were significantly correlated with the GA levels in the blood (P<0.001). Multiple regression analysis revealed that these correlations were maintained even after adjustments for the BMI, age, and nephropathy stage (P<0.001). CONCLUSION GA levels in tear and saliva specimens, as diabetes-related biomarkers, can be measured non-invasively. Since this measurement can be performed noninvasively and not as frequently as compared with the more invasive finger prick method, it is expected to reduce the burden on people with diabetes in terms of both the invasiveness and cost-effectiveness. In the future, we would like to verify the effect of regular GA measurement on the glycemic control while considering the clinical cost-effectiveness.
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Affiliation(s)
- Masakazu Aihara
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | | | | | | | - Yoshitaka Sakurai
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Takanori Hayashi
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; Departmentof Clinical Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Tokyo, Japan
| | - Chie Koizumi
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tetsuya Kubota
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; Departmentof Clinical Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Tokyo, Japan; Divisionof Diabetes and Metabolism, The Institute for Medical Science, Asahi Life Foundation, Tokyo, Japan; Divisionof Cardiovascular Medicine, Toho University Ohashi Medical Center, Tokyo, Japan; Laboratoryfor Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Satoshi Usami
- Graduate School of Education, The University of Tokyo, Tokyo, Japan
| | - Toshimasa Yamauchi
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Toshiya Sakata
- Department of Materials Science and Engineering, Graduate School of Engineering, The University of Tokyo, Tokyo, Japan; Provigate Inc, Tokyo, Japan
| | - Takashi Kadowaki
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; ToranomonHospital, Tokyo, Japan
| | - Naoto Kubota
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; Departmentof Clinical Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Tokyo, Japan; Department of Clinical Nutrition Therapy, The University of Tokyo Hospital, Tokyo, Japan.
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5
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Hayashi T, Wada N, Kubota T, Koizumi C, Sakurai Y, Aihara M, Usami S, Yamauchi T, Kubota N. Associations of sleep quality with the skeletal muscle strength in patients with type 2 diabetes with poor glycemic control. J Diabetes Investig 2023; 14:801-810. [PMID: 36934440 DOI: 10.1111/jdi.14007] [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] [Received: 12/07/2022] [Revised: 02/20/2023] [Accepted: 02/27/2023] [Indexed: 03/20/2023] Open
Abstract
AIMS/INTRODUCTION Patients with type 2 diabetes mellitus are reported to be at a high risk for sarcopenia, and are known to have a poorer sleep quality. However, the association between sleep quality and skeletal muscle in patients with type 2 diabetes mellitus is not yet precisely understood. MATERIALS AND METHODS A total of 110 inpatients with type 2 diabetes mellitus aged 40-90 years were enrolled. The sleep quality was assessed using the Pittsburgh sleep quality index (PSQI). Skeletal muscle mass was measured using bioelectrical impedance analysis. Muscle strength was evaluated by measuring the grip strength. We also performed dietary surveys and measurements of the plasma amino acid levels. RESULTS A high total score on the PSQI was significantly associated with reduced muscle strength, and the association persisted even after adjustments for confounders. On the other hand, adjusted analysis did not reveal any significant associations between the PSQI total score and the skeletal muscle mass. In regard to the associations with subscores of the PSQI, the scores for sleep latency, sleep efficiency, and daytime dysfunction were significantly negatively associated with the muscle strength. Although poor sleep quality was associated with a high confectionery intake and low plasma arginine, citrulline, and ornithine levels, neither confectionery intake levels nor the plasma levels of these amino acids was associated with the muscle strength. CONCLUSIONS Our study revealed a significant association between the sleep quality and muscle strength in patients with type 2 diabetes mellitus. These results suggest that poor sleep quality is an important risk factor for sarcopenia in patients with type 2 diabetes mellitus.
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Affiliation(s)
- Takanori Hayashi
- Department of Clinical Nutrition, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Tokyo, Japan.,Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Nobuhiro Wada
- Department of Clinical Nutrition, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Tokyo, Japan.,Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Tetsuya Kubota
- Department of Clinical Nutrition, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Tokyo, Japan.,Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.,Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan.,Division of Diabetes and Metabolism, The Institute of Medical Science, Asahi Life Foundation, Tokyo, Japan.,Division of Cardiovascular Medicine, Ohashi Hospital, Toho University, Tokyo, Japan
| | - Chie Koizumi
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yoshitaka Sakurai
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Masakazu Aihara
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Satoshi Usami
- Graduate School of Education, The University of Tokyo, Tokyo, Japan
| | - Toshimasa Yamauchi
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Naoto Kubota
- Department of Clinical Nutrition, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Tokyo, Japan.,Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.,Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan.,Department of Clinical Nutrition Therapy, The University of Tokyo, Tokyo, Japan
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Aihara M, Irie T, Yasukawa K, Minoura I, Miyauchi N, Nishi M, Katayama N, Yachiku K, Jinnouchi H, Kadowaki T, Yamauchi T, Yatomi Y, Kubota N, Sekimizu K. Development of a high-performance liquid chromatographic glycated albumin assay using finger-prick blood samples. Clin Chim Acta 2023; 542:117272. [PMID: 36858193 DOI: 10.1016/j.cca.2023.117272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 02/15/2023] [Accepted: 02/24/2023] [Indexed: 03/02/2023]
Abstract
BACKGROUND Home blood glucose monitoring can be effective for the self-management of diabetic patients. Hemoglobin A1c (HbA1c) is a widely used marker that reflects the average blood glucose within 1-2 months but does not sensitively respond to behavioral changes. Self-monitoring of blood glucose, continuous glucose monitoring, and flush glucose monitoring are sensitive; however, the cost and invasiveness of these tests prevent their widespread use. We focused on glycated albumin (GA), which reflects the average blood glucose levels over 1-2 weeks, and established a GA measurement method for self-sampling, finger-prick blood, which may be submitted for testing through postal service to receive weekly results. METHODS A high-performance liquid chromatography assay was established to measure GA levels in finger-prick blood samples from 103 diabetic patients and the results were compared with venous blood measurements using an enzymatic method. Furthermore, conditions for sending blood samples by mail were evaluated. Under these conditions, samples from 27 healthy and 32 patient volunteers sent through postal service were compared with samples stored in the laboratory. RESULTS GA levels were measured in samples containing > 20 μg albumin, which resulted in a CV less than 0.3%. The correlation between the GA levels of finger-prick blood measured using HPLC and the GA levels of venous blood measured using the enzymatic method was R2 = 0.988 with the slope ∼ 1.0, suggesting that the two were nearly equivalent. GA levels were stable for four days at 30 °C and two days at 37 °C. Mail-delivered samples exhibited a high correlation with samples that were not sent (R2 > 0.99). CONCLUSIONS We established a method to measure GA levels in self-sampled, finger-prick blood sent through postal service in Japan. The method is applicable for weekly feedback of GA levels, which is potentially useful for motivating behavioral changes. In addition to markers such as HbA1c and blood glucose, GA can be used as a marker for assessing dietary and physical activities. This study highlighted the importance of GA monitoring by developing a suitable measurement method for weekly monitoring of GA levels.
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Affiliation(s)
- Masakazu Aihara
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, Japan
| | - Tomoko Irie
- Provigate Inc., University of Tokyo Entrepreneur Plaza, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Keiko Yasukawa
- Department of Clinical Laboratory, The University of Tokyo Hospital, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Itsushi Minoura
- Provigate Inc., University of Tokyo Entrepreneur Plaza, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Noriko Miyauchi
- Provigate Inc., University of Tokyo Entrepreneur Plaza, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Mitsumi Nishi
- Provigate Inc., University of Tokyo Entrepreneur Plaza, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Norikazu Katayama
- Provigate Inc., University of Tokyo Entrepreneur Plaza, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kenji Yachiku
- Provigate Inc., University of Tokyo Entrepreneur Plaza, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hideaki Jinnouchi
- Jinnouchi Hospital, Kuhonji 6-2-3, Chuo-ku, Kumamoto 862-0976, Japan
| | - Takashi Kadowaki
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, Japan; Toranomon Hospital, Toranomon 2-2-2, Minato-ku, Tokyo 105-8470, Japan
| | - Toshimasa Yamauchi
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, Japan
| | - Yutaka Yatomi
- Department of Clinical Laboratory, The University of Tokyo Hospital, Bunkyo-ku, Tokyo 113-8655, Japan
| | - Naoto Kubota
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo 113-8655, Japan.
| | - Koshin Sekimizu
- Provigate Inc., University of Tokyo Entrepreneur Plaza, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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Watanabe T, Watanabe Y, Ikeda N, Aihara M, Yamaguchi Y. 107 Serum levels of C-C motif chemokine ligand 2 and interleukin-8 as possible biomarkers in patients with toxic epidermal necrolysis accompanied by acute respiratory distress syndrome. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.117] [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: 11/19/2022]
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Sawada M, Ohkuma K, Aihara M, Doi S, Sekine R, Kaneko T, Iimuro S, Ichi I, Usami S, Ohe K, Yamauchi T, Kubota N. Impact of the COVID-19 pandemic on the glycemic control, eating habits, and body compositions of people with diabetes mellitus: A retrospective longitudinal observational study. J Diabetes Investig 2022; 14:321-328. [PMID: 36346131 PMCID: PMC9878046 DOI: 10.1111/jdi.13934] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 09/27/2022] [Accepted: 10/12/2022] [Indexed: 11/10/2022] Open
Abstract
AIMS/INTRODUCTION To evaluate the impact of the COVID-19 pandemic on the glycemic control, eating habits, and body composition of people with diabetes mellitus; to identify the determinants of worsening glycemic control in people with diabetes mellitus. MATERIALS AND METHODS This retrospective, longitudinal observational study was performed in outpatients with diabetes mellitus who visited our hospital between April 2019 and March 2020 (pre-COVID-19 period) and continued for follow up from April 2020 to March 2021 (COVID-19 period). We compared the glycemic control, nutritional intakes, and body composition of people with diabetes mellitus between the two periods. The changes in the HbA1c values (ΔHbA1c) and other study variables were compared between the two periods. Logistic regression analysis was performed to identify the factors associated with the increase of HbA1c levels. RESULTS A significant increase of HbA1c was observed during the COVID-19 period. The percent fat mass (FM) also increased, while the percent skeletal muscle mass (SMM) decreased during the COVID-19 period. After adjustments for age and sex, the ΔBMI (OR:2.33), ΔFM (OR:1.45), and ΔSMM (OR:0.51) were identified as being associated with elevated levels of HbA1c. CONCLUSIONS The COVID-19 pandemic had a negative impact on the glycemic control and body composition of people with diabetes mellitus. The increased body weight and FM and decreased SMM observed during the pandemic were associated with poor glycemic control in people with diabetes mellitus.
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Affiliation(s)
- Mika Sawada
- Department of Clinical Nutrition TherapyThe University of Tokyo HospitalTokyoJapan
| | - Kanako Ohkuma
- Department of Diabetes and Metabolic DiseasesGraduate School of Medicine, The University of TokyoTokyoJapan
| | - Masakazu Aihara
- Department of Diabetes and Metabolic DiseasesGraduate School of Medicine, The University of TokyoTokyoJapan
| | - Shunsuke Doi
- Department of Healthcare and Information ManagementThe University of Tokyo HospitalTokyoJapan
| | - Rie Sekine
- Department of Clinical Nutrition TherapyThe University of Tokyo HospitalTokyoJapan
| | - Tetsuji Kaneko
- Clinical Research Support CenterTokyo Metropolitan Children's Medical CenterTokyoJapan
| | - Satoshi Iimuro
- International University of Health and Welfare Graduate School of Public HealthTokyoJapan
| | - Ikuyo Ichi
- Graduate School of Humanities and SciencesOchanomizu UniversityTokyoJapan
| | - Satoshi Usami
- Graduate School of EducationThe University of TokyoTokyoJapan
| | - Kazuhiko Ohe
- Department of Healthcare and Information ManagementThe University of Tokyo HospitalTokyoJapan
| | - Toshimasa Yamauchi
- Department of Diabetes and Metabolic DiseasesGraduate School of Medicine, The University of TokyoTokyoJapan
| | - Naoto Kubota
- Department of Clinical Nutrition TherapyThe University of Tokyo HospitalTokyoJapan,Department of Diabetes and Metabolic DiseasesGraduate School of Medicine, The University of TokyoTokyoJapan
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Hayashi T, Kubota T, Mariko I, Takamoto I, Aihara M, Sakurai Y, Wada N, Miki T, Yamauchi T, Kubota N, Kadowaki T. Lack of Brain Insulin Receptor Substrate-1 Causes Growth Retardation, With Decreased Expression of Growth Hormone-Releasing Hormone in the Hypothalamus. Diabetes 2021; 70:1640-1653. [PMID: 33980693 DOI: 10.2337/db20-0482] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 05/07/2021] [Indexed: 11/13/2022]
Abstract
Insulin receptor substrate-1 (Irs1) is one of the major substrates for insulin receptor and insulin-like growth factor-1 (IGF-1) receptor tyrosine kinases. Systemic Irs1-deficient mice show growth retardation, with resistance to insulin and IGF-1, although the underlying mechanisms remain poorly understood. For this study, we generated mice with brain-specific deletion of Irs1 (NIrs1KO mice). The NIrs1KO mice exhibited lower body weights, shorter bodies and bone lengths, and decreased bone density. Moreover, the NIrs1KO mice exhibited increased insulin sensitivity and glucose utilization in the skeletal muscle. Although the ability of the pituitary to secrete growth hormone (GH) remained intact, the amount of hypothalamic growth hormone-releasing hormone (GHRH) was significantly decreased and, accordingly, the pituitary GH mRNA expression levels were impaired in these mice. Plasma GH and IGF-1 levels were also lower in the NIrs1KO mice. The expression levels of GHRH protein in the median eminence, where Irs1 antibody staining is observed, were markedly decreased in the NIrs1KO mice. In vitro, neurite elongation after IGF-1 stimulation was significantly impaired by Irs1 downregulation in the cultured N-38 hypothalamic neurons. In conclusion, brain Irs1 plays important roles in the regulation of neurite outgrowth of GHRH neurons, somatic growth, and glucose homeostasis.
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Affiliation(s)
- Takanori Hayashi
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- Department of Clinical Nutrition, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Tokyo, Japan
| | - Tetsuya Kubota
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- Department of Clinical Nutrition, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Tokyo, Japan
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan
- Division of Diabetes and Metabolism, The Institute of Medical Science, Asahi Life Foundation, Tokyo, Japan
- Division of Cardiovascular Medicine, Toho University, Ohashi Hospital, Tokyo, Japan
| | - Inoue Mariko
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- Department of Clinical Nutrition, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Tokyo, Japan
| | - Iseki Takamoto
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Masakazu Aihara
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yoshitaka Sakurai
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Nobuhiro Wada
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- Department of Clinical Nutrition, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Tokyo, Japan
| | - Takashi Miki
- Department of Medical Physiology, Chiba University, Graduate School of Medicine, Chiba, Japan
| | - Toshimasa Yamauchi
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Naoto Kubota
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- Department of Clinical Nutrition, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Tokyo, Japan
- Department of Clinical Nutrition Therapy, The University of Tokyo, Tokyo, Japan
| | - Takashi Kadowaki
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
- Department of Prevention of Diabetes and Lifestyle-Related Diseases, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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10
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Aihara M, Kubota N, Minami T, Shirakawa R, Sakurai Y, Hayashi T, Iwamoto M, Takamoto I, Kubota T, Suzuki R, Usami S, Jinnouchi H, Aihara M, Yamauchi T, Sakata T, Kadowaki T. Association between tear and blood glucose concentrations: Random intercept model adjusted with confounders in tear samples negative for occult blood. J Diabetes Investig 2021; 12:266-276. [PMID: 32621777 PMCID: PMC7858102 DOI: 10.1111/jdi.13344] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 06/10/2020] [Accepted: 06/25/2020] [Indexed: 12/26/2022] Open
Abstract
AIMS/INTRODUCTION To prevent diabetic complications, strict glucose control and frequent monitoring of blood glucose levels with invasive methods are necessary. We considered the monitoring of tear glucose levels might be a possible method for non-invasive glucose monitoring. To develop tear glucose monitoring for clinical application, we investigated the precise correlation between the blood and tear glucose concentrations. MATERIALS AND METHODS A total of 10 participants and 20 participants with diabetes were admitted, and blood and tear samples were collected. Before statistical analysis, we eliminated tear samples contaminated with blood. We observed the daily blood and tear glucose dynamics, and carried out a random intercept model analysis to examine the association between the blood and tear glucose concentrations. RESULTS Tear occult blood tests showed that the tear glucose concentrations and their variation increased in both participants with and without diabetes as contamination of blood increased. In both participants with and without diabetes, fluctuations of the plasma glucose concentrations were observed depending on the timing of collection of the samples, and the dynamics of the tear glucose concentrations paralleled those of the plasma glucose concentrations. The random intercept model analysis showed a significant association between the plasma and tear glucose concentrations in participants with diabetes (P < 0.001). This association still existed even after adjusting for the glycated hemoglobin levels and the prandial state (P < 0.001). CONCLUSIONS It is important to eliminate the tear samples contaminated with blood. Tear glucose monitoring might be a reliable and non-invasive substitute method for monitoring the blood glucose concentrations for diabetes patients, irrespective of glycated hemoglobin levels and timing of sample collection.
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Affiliation(s)
- Masakazu Aihara
- Department of Diabetes and Metabolic DiseasesGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Naoto Kubota
- Department of Diabetes and Metabolic DiseasesGraduate School of MedicineThe University of TokyoTokyoJapan
- Department of Clinical Nutrition TherapyThe University of TokyoTokyoJapan
- Clinical Nutrition ProgramNational Institute of Health and NutritionTokyoJapan
- Laboratory for Metabolic HomeostasisRIKEN Center for Integrative Medical SciencesKanagawaJapan
| | - Takahiro Minami
- Department of OphthalmologyGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Rika Shirakawa
- Department of OphthalmologyGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Yoshitaka Sakurai
- Department of Diabetes and Metabolic DiseasesGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Takanori Hayashi
- Department of Diabetes and Metabolic DiseasesGraduate School of MedicineThe University of TokyoTokyoJapan
- Clinical Nutrition ProgramNational Institute of Health and NutritionTokyoJapan
| | - Masahiko Iwamoto
- Department of Diabetes and Metabolic DiseasesGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Iseki Takamoto
- Department of Diabetes and Metabolic DiseasesGraduate School of MedicineThe University of TokyoTokyoJapan
- Department of Diabetes and EndocrinologyNerima Hikarigaoka HospitalTokyoJapan
| | - Tetsuya Kubota
- Department of Diabetes and Metabolic DiseasesGraduate School of MedicineThe University of TokyoTokyoJapan
- Clinical Nutrition ProgramNational Institute of Health and NutritionTokyoJapan
- Laboratory for Metabolic HomeostasisRIKEN Center for Integrative Medical SciencesKanagawaJapan
- Analysis Tool Development GroupIntestinal Microbiota ProjectKanagawa Institute of Industrial Science and TechnologyKanagawaJapan
- Division of Cardiovascular MedicineToho University Ohashi Medical CenterTokyoJapan
| | - Ryo Suzuki
- Department of Diabetes and Metabolic DiseasesGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Satoshi Usami
- Graduate School of EducationThe University of TokyoTokyoJapan
| | | | - Makoto Aihara
- Department of OphthalmologyGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Toshimasa Yamauchi
- Department of Diabetes and Metabolic DiseasesGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Toshiya Sakata
- Department of Materials Science and EngineeringGraduate School of EngineeringThe University of TokyoTokyoJapan
- Provigate IncTokyoJapan
| | - Takashi Kadowaki
- Department of Diabetes and Metabolic DiseasesGraduate School of MedicineThe University of TokyoTokyoJapan
- Department of Prevention of Diabetes and Lifestyle‐Related DiseasesGraduate School of MedicineThe University of TokyoTokyoJapan
- Department of Metabolism and NutritionFaculty of MedicineMizonokuchi HospitalTeikyo UniversityKanagawaJapan
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11
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Suzuki M, Yamaguchi Y, Nakamura K, Kanaoka M, Matsukura S, Takahashi K, Takahashi Y, Kambara T, Aihara M. Serum thymus and activation‐regulated chemokine (TARC/CCL17) may be useful to predict the disease activity in patients with bullous pemphigoid. J Eur Acad Dermatol Venereol 2020; 35:e121-e124. [PMID: 32761977 DOI: 10.1111/jdv.16851] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 07/21/2020] [Accepted: 07/30/2020] [Indexed: 12/01/2022]
Affiliation(s)
- M. Suzuki
- Department of Environmental Immuno‐Dermatology Yokohama City University Graduate School of Medicine Yokohama Japan
- Department of Dermatology Yokohama City University Medical Centre Yokohama Japan
| | - Y. Yamaguchi
- Department of Environmental Immuno‐Dermatology Yokohama City University Graduate School of Medicine Yokohama Japan
| | - K. Nakamura
- Department of Dermatology Yokohama City University Medical Centre Yokohama Japan
| | - M. Kanaoka
- Department of Environmental Immuno‐Dermatology Yokohama City University Graduate School of Medicine Yokohama Japan
| | - S. Matsukura
- Department of Dermatology Yokohama City University Medical Centre Yokohama Japan
| | - K. Takahashi
- Department of Environmental Immuno‐Dermatology Yokohama City University Graduate School of Medicine Yokohama Japan
| | - Y. Takahashi
- NHO Shizuoka Institute of Epilepsy and Neurological Disorders Shizuoka Japan
| | - T. Kambara
- Department of Dermatology Yokohama City University Medical Centre Yokohama Japan
| | - M. Aihara
- Department of Environmental Immuno‐Dermatology Yokohama City University Graduate School of Medicine Yokohama Japan
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12
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Watanabe T, Yamaguchi Y, Watanabe Y, Takamura N, Aihara M. 026 Increased levels of high mobility group box-1 in the serum and skin in patients with generalized pustular psoriasis. J Invest Dermatol 2020. [DOI: 10.1016/j.jid.2020.03.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Watanabe Y, Yamaguchi Y, Takamura N, Komitsu N, Aihara M. Leptin induces interleukin-6 production in keratinocytes via decreased expression of caveolin-1: a possible link between obesity and psoriatic inflammation. Br J Dermatol 2020; 183:768-770. [PMID: 32294231 DOI: 10.1111/bjd.19133] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Y Watanabe
- Department of Environmental Immuno-Dermatology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - Y Yamaguchi
- Department of Environmental Immuno-Dermatology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - N Takamura
- Department of Environmental Immuno-Dermatology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - N Komitsu
- Department of Environmental Immuno-Dermatology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - M Aihara
- Department of Environmental Immuno-Dermatology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
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14
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Ototake Y, Yamaguchi Y, Asami M, Komitsu N, Watanabe T, Kurotaki D, Tamura T, Aihara M. 024 Downregulated expression of Interferon regulatory factor 8 in monocytes/macrophages exhibits pro-fibrotic phenotype and may contribute to the pathogenic process of systemic sclerosis. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.027] [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: 10/26/2022]
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15
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Ando W, Yasui H, Yamamoto K, Oinuma K, Tokunaga H, Inaba Y, Kobayashi N, Aihara M, Nakanishi R, Ohzono K. A comparison of the effect of large and small metal-on-metal bearings in total hip arthroplasty on metal ion levels and the incidence of pseudotumour. Bone Joint J 2018; 100-B:1018-1024. [DOI: 10.1302/0301-620x.100b8.bjj-2018-0414.r1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Aims The purpose of this study was to compare two different types of metal-on-metal (MoM) bearing for total hip arthroplasty (THA): one with a large femoral head (38 mm to 52 mm) and the other with a conventional femoral head (28 mm or 32 mm). We compared clinical outcome, blood metal ion levels, and the incidence of pseudotumour in the two groups. Patients and Methods Between December 2009 and December 2011, 62 patients underwent MoM THA with a large femoral head (Magnum group) and 57 patients an MoM THA with a conventional femoral head (conventional group). Clinical outcome was assessed using the Harris Hip score, University of California, Los Angeles (UCLA) activity score and EuroQol-5D (EQ-5D). Blood metal ion levels were measured and MRI scans were analyzed at a minimum of five years postoperatively. Results No acetabular component was implanted with more than 50° of inclination in either group. The Harris Hip Score, UCLA activity score, and EQ-5D improved postoperatively in both groups; no significant clinical differences were noted between the groups. The blood cobalt ion levels in the conventional group continued to rise postoperatively to five years while reaching a plateau at two years postoperatively in the Magnum group. At five years, the mean cobalt ion level of 1.16 μg/l (sd 1.32) in the Magnum group was significantly lower than the 3.77 μg/l (sd 9.80) seen in the conventional group (p = 0.0015). The incidence of moderate to severe pseudotumour was 4.7% in the Magnum group and 20.6% in the conventional group. There were no dislocations in the Magnum group and two in the conventional group. One patient in the Magnum group underwent revision for pseudotumour at 4.7 years postoperatively. Conclusion At five years, a well-positioned large head MoM THA has a significantly lower level of metal ion release and a lower incidence of moderate to severe pseudotumour than a MoM bearing of conventional size. Cite this article: Bone Joint J 2018;100-B:1018–24.
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Affiliation(s)
- W. Ando
- Department of Orthopaedic Surgery, Kansai
Rosai Hospital, Amagasaki, Japan
| | - H. Yasui
- Department of Orthopaedic Surgery, Kansai
Rosai Hospital, Amagasaki, Japan
| | - K. Yamamoto
- Department of Orthopaedic Surgery, Kansai
Rosai Hospital, Amagasaki, Japan
| | - K. Oinuma
- Funabashi Orthopaedic Hospital, Funabashi, Japan
| | - H. Tokunaga
- Department of Orthopaedic Surgery, Kansai
Medical University Medical Center, Moriguchi, Japan
| | - Y. Inaba
- Department of Orthopaedic Surgery, Yokohama
City University, Yokohama, Japan
| | - N. Kobayashi
- Department of Orthopaedic Surgery, Yokohama
City University, Yokohama, Japan
| | - M. Aihara
- Department of Orthopaedic Surgery, Aihara
Hospital, Minoh, Japan
| | - R. Nakanishi
- Department of Orthopaedic Surgery, Showa
University, Fujigaoka Hospital, Yokohama, Japan
| | - K. Ohzono
- Department of Orthopaedic Surgery, Kansai
Rosai Hospital, Amagasaki, Japan
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16
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Aihara M, Sawada Y, Ueno K, Morimoto S, Yoshida Y, Serres MD, Copper HA, Wegner RH. Visualization of von Willebrand Factor Multimers by Immunoenzymatic Stain Using Avidin-Biotin Peroxidase Complex. Thromb Haemost 2018. [DOI: 10.1055/s-0038-1661533] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
SummaryA technique for the detection of von Willebrand factor multimers separated by discontinuous SDS agarose electrophoresis has been developed using non-radioactive com-v pounds. The multimeric patterns were visualized by monospecific anti-human vWF:Ag followed by incubation with biotinylated antibody. After addition of avidin-biotin-peroxidase complex, the peroxidase activitiy was detected by 4-chloro-l-naphthol, giving sharp bands with a clear background.By this method, the differences of vWF : Ag multimers could be easily observed between normal plasma and the plasmas from variant type vWD (IIA, IIB, platelet-type). Large and intermediate multimers were absent in the plasma with vWD type IIA, while only large multimers were absent in the plasma with vWD IIB and platelet-type. The absence of large multimers was also observed in two commercial F VIII preparations having the ratio of vWF/vWF : Ag 0.18 and 0.63. The preparation with the ratio of 0.63 showed the presence of larger intermediate multimers.Electrophoresis in SDS 1.5% agarose gel revealed triplet structure of each small multimer, and a relative increase of the smallest subband was observed in vWD IIA plasma, platelet-type vWD plasma and commercial F VIII preparations.The procedures described are easy and safe to perform and are useful for screening or classifying cases with vWD in general laboratories.
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Affiliation(s)
- M Aihara
- The First Department of Internal Medicine, Hirosaki University School of Medicine, Hirosaki, Japan
| | - Y Sawada
- The First Department of Internal Medicine, Hirosaki University School of Medicine, Hirosaki, Japan
| | - K Ueno
- The First Department of Internal Medicine, Hirosaki University School of Medicine, Hirosaki, Japan
| | - S Morimoto
- The First Department of Internal Medicine, Hirosaki University School of Medicine, Hirosaki, Japan
| | - Y Yoshida
- The First Department of Internal Medicine, Hirosaki University School of Medicine, Hirosaki, Japan
| | - M de Serres
- The Department of Pathology and Center for Thrombosis and Hemostasis, The University of North Carolina, Chapel Hill, NC, USA
| | - H A Copper
- The Department of Pathology and Center for Thrombosis and Hemostasis, The University of North Carolina, Chapel Hill, NC, USA
| | - R H Wegner
- The Department of Pathology and Center for Thrombosis and Hemostasis, The University of North Carolina, Chapel Hill, NC, USA
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Yamaguchi Y, Kuwana M, Kanaoka M, Watanabe T, Okiyama N, Gono T, Kodera M, Kambara T, Hamaguchi Y, Seishima M, Takehara K, Fujimoto M, Aihara M. 521 DRB1 is the primary genetic locus contributing to susceptibility to dermatomyositis positive for anti-TIF1γ antibody in Japanese. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.529] [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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18
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Kanaoka M, Yamaguchi Y, Komitsu N, Arima K, Izuhara K, Aihara M. 338 Pro-fibrotic phenotype of human skin fibroblasts induced by periostin via modulating TGF-β signaling. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.07.533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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19
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Takamura N, Yamaguchi Y, Watanabe Y, Asami M, Komitsu N, Aihara M. 337 Downregulated Caveolin-1 expression in monocytes may contribute to the pathogenesis of psoriasis. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.07.532] [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: 12/01/2022]
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20
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Sasaki O, Aihara M, Nishiura A, Takeda H. Genetic correlations between the cumulative pseudo-survival rate, milk yield, and somatic cell score during lactation in Holstein cattle in Japan using a random regression model. J Dairy Sci 2017; 100:7282-7294. [DOI: 10.3168/jds.2016-12311] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 05/23/2017] [Indexed: 11/19/2022]
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21
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Hakuta A, Yamaguchi Y, Okawa T, Sakai Y, Yamamoto S, Aihara M. 304 Collagent tripeptide may modulate inflammation in atopic dermatitis. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.02.320] [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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22
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Yamaguchi Y, Shirai Y, Ono J, Kawaguchi Y, Izuhara K, Kuwana M, Aihara M. 360 An elevated circulating level of periostin in patients with systemic sclerosis: Associations with functional impairment in various affected organs. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.02.377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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23
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Watanabe Y, Yamaguchi Y, Komitsu N, Ohta S, Azuma Y, Izuhara K, Aihara M. Elevation of serum squamous cell carcinoma antigen 2 in patients with psoriasis: associations with disease severity and response to the treatment. Br J Dermatol 2016; 174:1327-36. [PMID: 26822223 DOI: 10.1111/bjd.14426] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/25/2016] [Indexed: 01/18/2023]
Abstract
BACKGROUND Squamous cell carcinoma antigen (SCCA) belongs to the ovalbumin-serpin family and is a known tumour marker. Expression of SCCA is upregulated in the serum and skin of patients with psoriasis. OBJECTIVES The aim of this study was to determine SCCA2 levels in association with disease severity and treatment efficacy in patients with psoriasis. MATERIALS AND METHODS Patients with psoriasis (n = 123) and healthy controls (n = 25) were enrolled in this prospective cross-sectional study. Enzyme-linked immunosorbent assay (ELISA) analysis was performed to determine serum SCCA2 levels. SCCA2 expression in skin was evaluated using immunohistochemical analysis. Serum SCCA2 levels were compared with Psoriasis Area Severity Index (PASI) scores. The effect of treatment on serum SCCA2 levels was assessed using serial examinations. Induction of SCCA2 by several psoriatic cytokines in human keratinocytes was evaluated. RESULTS The serum levels of SCCA2 were significantly higher in patients with psoriasis than healthy controls and correlated well with disease severity. Increased SCCA2 staining was observed in lesional skin but not in nonlesional skin of patients with psoriasis. In addition, SCCA2 expression levels in skin correlated with serum concentrations of SCCA2. SCCA2 significantly decreased according to improvement of PASI scores. Interleukin (IL)-17 and IL-22 synergistically increased the production of SCCA2 at both mRNA and protein levels in human keratinocytes. CONCLUSIONS Significant elevation of SCCA2 is associated with disease severity and reflects treatment efficacy. SCCA2 may be a useful biomarker in psoriasis, reflecting T-helper 17-type inflammation - the main determinant of the severity of psoriasis.
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Affiliation(s)
- Y Watanabe
- Department of Environmental Immuno-Dermatology, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan
| | - Y Yamaguchi
- Department of Environmental Immuno-Dermatology, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan
| | - N Komitsu
- Department of Environmental Immuno-Dermatology, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan
| | - S Ohta
- Department of Laboratory Medicine, Saga Medical School, Saga, Japan
| | - Y Azuma
- Shino-Test Corporation, Sagamihara, Japan
| | - K Izuhara
- Division of Medical Biochemistry, Department of Biomolecular Sciences, Saga Medical School, Saga, Japan
| | - M Aihara
- Department of Environmental Immuno-Dermatology, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, Kanagawa, 236-0004, Japan
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24
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Kobayashi Y, Akiyama H, Huge J, Kubota H, Chikazawa S, Satoh T, Miyake T, Uhara H, Okuyama R, Nakagawara R, Aihara M, Hamada-Sato N. Fish collagen is an important panallergen in the Japanese population. Allergy 2016; 71:720-3. [PMID: 26785247 DOI: 10.1111/all.12836] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [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: 01/04/2016] [Indexed: 12/01/2022]
Abstract
Collagen was identified as a fish allergen in early 2000s. Although its allergenic potential has been suggested to be low, risks associated with collagen as a fish allergen have not been evaluated to a greater extent. In this study, we aimed to clarify the importance of collagen as a fish allergen. Our results showed that 50% of Japanese patients with fish allergy had immunoglobulin E (IgE) against mackerel collagen, whereas 44% had IgE against mackerel parvalbumin. IgE inhibition assay revealed high cross-reactivity of mackerel collagen to 22 fish species (inhibition rates: 87-98%). Furthermore, a recently developed allergy test demonstrated that collagen triggered IgE cross-linking on mast cells. These data indicate that fish collagen is an important and very common panallergen in fish consumed in Japan. The high rate of individuals' collagen allergy may be attributable to the traditional Japanese custom of raw fish consumption.
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Affiliation(s)
- Y. Kobayashi
- Department of Marine Biosciences; Tokyo University of Marine Science and Technology; Minato-ku Tokyo Japan
- Course of Safety Management in Food Supply Chain; Tokyo University of Marine Science and Technology; Minato-ku Tokyo Japan
| | - H. Akiyama
- Chemistry Division; Kanagawa Prefectural Institute of Public Health; Chigasaki-shi Kanagawa Japan
| | - J. Huge
- Course of Safety Management in Food Supply Chain; Tokyo University of Marine Science and Technology; Minato-ku Tokyo Japan
| | - H. Kubota
- Course of Safety Management in Food Supply Chain; Tokyo University of Marine Science and Technology; Minato-ku Tokyo Japan
| | - S. Chikazawa
- Department of Dermatology; National Defense Medical College; Tokorozawa-shi Saitama Japan
| | - T. Satoh
- Department of Dermatology; National Defense Medical College; Tokorozawa-shi Saitama Japan
| | - T. Miyake
- Department of Dermatology; Shinshu University Hospital; Matsumoto-shi Nagano Japan
| | - H. Uhara
- Department of Dermatology; Shinshu University Hospital; Matsumoto-shi Nagano Japan
| | - R. Okuyama
- Department of Dermatology; Shinshu University Hospital; Matsumoto-shi Nagano Japan
| | - R. Nakagawara
- Department of Dermatology; Yokohama City University School of Medicine; Yokohama-shi Kanagawa Japan
| | - M. Aihara
- Department of Dermatology; Yokohama City University School of Medicine; Yokohama-shi Kanagawa Japan
| | - N. Hamada-Sato
- Department of Marine Biosciences; Tokyo University of Marine Science and Technology; Minato-ku Tokyo Japan
- Course of Safety Management in Food Supply Chain; Tokyo University of Marine Science and Technology; Minato-ku Tokyo Japan
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Hata M, Wada H, Ogino I, Omura M, Koike I, Tayama Y, Odagiri K, Kasuya T, Aihara M, Inoue T. PO-0761: Radiation therapy for angiosarcoma of the scalp: total scalp irradiation with X-rays and electrons. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32011-4] [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: 11/29/2022]
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Sasaki O, Aihara M, Nishiura A, Takeda H, Satoh M. Genetic analysis of the cumulative pseudo-survival rate during lactation of Holstein cattle in Japan by using random regression models. J Dairy Sci 2015; 98:5781-95. [DOI: 10.3168/jds.2014-9152] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 04/08/2015] [Indexed: 11/19/2022]
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Yamakawa K, Aihara M, Ogura H, Yuhara H, Hamasaki T, Shimazu T. Recombinant human soluble thrombomodulin in severe sepsis: a systematic review and meta-analysis. J Thromb Haemost 2015; 13:508-19. [PMID: 25581687 DOI: 10.1111/jth.12841] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [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: 09/23/2014] [Accepted: 01/04/2015] [Indexed: 12/14/2022]
Abstract
BACKGROUND Although recombinant human soluble thrombomodulin (rhTM) is a widely used novel anticoagulant agent for disseminated intravascular coagulation (DIC) in Japan, its clinical efficacy in sepsis-induced DIC has not been demonstrated convincingly. OBJECTIVE To assess the benefits and harms of rhTM in sepsis-induced DIC patients. METHODS We conducted a systematic review and meta-analysis of rhTM therapy for sepsis-induced DIC for both randomized controlled trials (RCTs) and observational studies (retrospective case-control studies and/or prospective cohort studies) separately. All-cause mortality (28-30 days) as efficacy and serious bleeding complications as adverse effect were measured as primary outcomes. We assessed body of evidence quality at the outcome level by using the Grading of Evidence, Assessment, Development and Evaluation (GRADE) approach. RESULTS We analyzed 12 studies (838 patients/3 RCTs; 571 patients/9 observational studies). Pooled relative risk was 0.81 (95% CI, 0.62-1.06) in the RCTs, indicating non-significant reduction in mortality, and 0.59 (95% CI, 0.45-0.77) in the observational studies. Meta-regression analysis revealed a significant negative slope between effect size of rhTM therapy and baseline mortality rate in individual studies (P = 0.012), suggesting that probability of a beneficial effect with rhTM therapy increases with increasing baseline risk. Risk of serious bleeding complications was not significantly different between rhTM and control groups. We judged the quality of evidence as moderate for mortality and serious bleeding. CONCLUSIONS The rhTM was associated with a trend in reduction of mortality at 28-30 days in sepsis-induced DIC patients. Further large rigorous trials are needed to confirm or refute these findings before implications for practice are clear.
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Affiliation(s)
- K Yamakawa
- Department of Traumatology and Acute Critical Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
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Fujita H, Matsukura S, Watanabe T, Komitsu N, Watanabe Y, Takahashi Y, Kambara T, Ikezawa Z, Aihara M. The serum level of HMGB1 (high mobility group box 1 protein) is preferentially high in drug-induced hypersensitivity syndrome/drug reaction with eosinophilia and systemic symptoms. Br J Dermatol 2014; 171:1585-8. [PMID: 24903194 DOI: 10.1111/bjd.13162] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- H Fujita
- Department of Environmental Immuno-Dermatology, Yokohama City University Graduate School of Medicine, Yokohama, Japan.
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Kou K, Okawa T, Yamaguchi Y, Ono J, Inoue Y, Kohno M, Matsukura S, Kambara T, Ohta S, Izuhara K, Aihara M. Periostin levels correlate with disease severity and chronicity in patients with atopic dermatitis. Br J Dermatol 2014; 171:283-91. [PMID: 24601864 DOI: 10.1111/bjd.12943] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/26/2014] [Indexed: 12/14/2022]
Abstract
BACKGROUND Recent findings indicate that periostin, an extracellular matrix protein induced by T helper 2 cytokines, plays a critical role in the pathogenesis of atopic dermatitis (AD). OBJECTIVES To determine whether serum periostin level is associated with clinical phenotype in adult patients with AD. METHODS An enzyme-linked immunosorbent assay was performed to determine serum periostin levels in 257 adult patients with AD, 66 patients with psoriasis vulgaris (PV) as a disease control and 25 healthy controls. Serum periostin levels were analysed together with clinical characteristics and laboratory parameters, including thymus and activation-regulated chemokine (TARC), lactate dehydrogenase (LDH), blood eosinophil count and total IgE. Immunohistochemical analysis evaluated the expression of periostin in association with various clinical phenotypes of AD. The effect of treatment on serum periostin level was also assessed. RESULTS Serum periostin was significantly higher in patients with AD than in patients with PV and healthy controls. Periostin level was found to be positively correlated with disease severity, TARC level, LDH level and eosinophil count, but not with IgE level. Higher serum periostin level was observed in patients with extrinsic AD compared with patients with intrinsic AD; the positive correlation of disease severity disappeared in patients with intrinsic AD. Robust expression of periostin was detected in the dermis of patients with AD with erythroderma, lichenification and, to a lesser extent, scaly erythema. Serial measurement of serum periostin revealed decreased levels of periostin after treatment for AD. CONCLUSIONS Periostin may play a critical role in disease severity and chronicity in the pathogenesis of AD.
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Affiliation(s)
- K Kou
- Department of Environmental Immuno-Dermatology, Yokohama City University Graduate School of Medicine, Yokohama, Japan
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Ogawa K, Morito H, Hasegawa A, Miyagawa F, Kobayashi N, Watanabe H, Sueki H, Tohyama M, Hashimoto K, Kano Y, Shiohara T, Ito K, Fujita H, Aihara M, Asada H. Elevated serum thymus and activation-regulated chemokine (TARC/CCL17) relates to reactivation of human herpesvirus 6 in drug reaction with eosinophilia and systemic symptoms (DRESS)/drug-induced hypersensitivity syndrome (DIHS). Br J Dermatol 2014; 171:425-7. [PMID: 24601914 DOI: 10.1111/bjd.12948] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- K Ogawa
- Department of Dermatology, Nara Medical University School of Medicine, 840 Shijo-cho, Kashihara, Nara, 634-8522, Japan
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Nakamura T, Okayama M, Aihara M, Kajii E. Injury mortality and accessibility to emergency care in Japan: an observational epidemiological study. Open Access Emerg Med 2014; 6:27-32. [PMID: 27147876 PMCID: PMC4753982 DOI: 10.2147/oaem.s61114] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [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: 11/23/2022] Open
Abstract
BACKGROUND Unintentional injury is a major cause of death across the globe. The accessibility to emergency medical services may affect the rate of preventable trauma deaths. The purpose of this study was to analyze the accessibility to emergency medical hospitals in municipalities in Japan and to clarify whether accessibility was associated with the mortality rate attributed to unintentional injuries. METHODS An observational epidemiological study was conducted in all 1,742 municipalities in Japan. Measurements assessed were population size, accessibility to emergency hospitals, and mortality rates attributed to unintentional injuries. Accessibility of each municipality to their nearest emergency hospital was calculated with a computer simulation using a geographic information system. After calculating demographic statistics and the Gini coefficient of accessibility, multivariate analyses were used to examine the correlation between accessibility time and mortality. Municipalities were divided into six groups according to accessibility time, and we then performed a correlation analysis between accessibility time and mortality using analysis of covariance. RESULTS The median time of accessibility to emergency hospitals was 34.5 minutes. The Gini coefficient of accessibility time was 0.410. A total of 385 municipalities (23.4%) had an accessibility time of over 60 minutes. Accessibility was significantly related to mortality (beta coefficient =0.006; P<0.001). The mortality rate in municipalities with an accessibility time of <15 minutes was lower than that in all other groups. The mortality rate in municipalities with an accessibility time of 15-30 minutes was lower than that in municipalities with an accessibility time of >30 minutes, and the mortality rate in municipalities with an accessibility time of 30-45 minutes was lower than that in municipalities with an accessibility time of 60-90 minutes (P<0.001). CONCLUSION The geographical disparities for emergency care accessibility were related to the rate of death by unintentional injury. Improving accessibility to emergency hospitals could help decrease the mortality rate of preventable trauma. Meanwhile, our findings suggest the need for substantially shorter accessibility times to emergency care facilities in many municipalities in Japan.
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Affiliation(s)
- Takashi Nakamura
- Center for Community Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Masanobu Okayama
- Center for Community Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Masakazu Aihara
- Center for Community Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Eiji Kajii
- Center for Community Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
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Kato T, Meguro A, Nomura E, Uemoto R, Nomura N, Ota M, Kashiwagi K, Mabuchi F, Iijima H, Kawase K, Yamamoto T, Nakamura M, Negi A, Sagara T, Nishida T, Inatani M, Tanihara H, Aihara M, Araie M, Fukuchi T, Abe H, Higashide T, Sugiyama K, Kanamoto T, Kiuchi Y, Iwase A, Chin S, Ohno S, Inoko H, Mizuki N. Association study of genetic variants on chromosome 7q31 with susceptibility to normal tension glaucoma in a Japanese population. Eye (Lond) 2013; 27:979-83. [PMID: 23743525 DOI: 10.1038/eye.2013.123] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Accepted: 05/04/2013] [Indexed: 12/14/2022] Open
Abstract
The caveolin 1 to caveolin 2 (CAV1-CAV2) gene region on chromosome 7q31 has been reported to be associated with susceptibility to primary open angle glaucoma (POAG) and normal tension glaucoma (NTG) in previous studies. We investigated whether genetic variants in the CAV1-CAV2 region are associated with NTG in Japanese patients. Two hundred and ninety-two Japanese patients with NTG and 352 Japanese healthy controls were recruited. We genotyped three single-nucleotide polymorphisms; that is, rs1052990, rs4236601, and rs7795356, in the CAV1-CAV2 gene region and assessed the allelic diversity among cases and controls. The frequency of the minor allele (G) of rs1052990 was significantly decreased in NTG cases compared with controls (P=0.014, OR=0.71), whereas NTG or POAG cases had a significantly higher frequency of the allele than controls in previous studies. Conversely, rs7795356 did not show any significant association with NTG cases, and rs4236601 was monomorphic in the Japanese study population. Our findings did not correspond with previous positive results, suggesting that CAV1-CAV2 variants studied in the present study are not important risk factors for NTG susceptibility in all populations. Further studies are needed to elucidate the possible contribution of the CAV1-CAV2 region to the development of glaucoma.
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Affiliation(s)
- T Kato
- Department of Ophthalmology, Yokohama City University School of Medicine, Kanagawa, Japan
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Yamaguchi Y, Ono J, Masuoka M, Ohta S, Izuhara K, Ikezawa Z, Aihara M, Takahashi K. Serum periostin levels are correlated with progressive skin sclerosis in patients with systemic sclerosis. Br J Dermatol 2013; 168:717-25. [DOI: 10.1111/bjd.12117] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [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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Togashi K, Hagiya K, Osawa T, Nakanishi T, Yamazaki T, Nagamine Y, Lin C, Matsumoto S, Aihara M, Hayasaka K. Lactation persistency as a component trait of the selection index and increase in reliability by using single nucleotide polymorphism in net merit defined as the first five lactation milk yields and herd life. Asian-Australas J Anim Sci 2012; 25:1073-82. [PMID: 25049665 PMCID: PMC4093001 DOI: 10.5713/ajas.2012.12009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Revised: 05/01/2012] [Accepted: 04/06/2012] [Indexed: 12/02/2022]
Abstract
We first sought to clarify the effects of discounted rate, survival rate, and lactation persistency as a component trait of the selection index on net merit, defined as the first five lactation milks and herd life (HL) weighted by 1 and 0.389 (currently used in Japan), respectively, in units of genetic standard deviation. Survival rate increased the relative economic importance of later lactation traits and the first five lactation milk yields during the first 120 months from the start of the breeding scheme. In contrast, reliabilities of the estimated breeding value (EBV) in later lactation traits are lower than those of earlier lactation traits. We then sought to clarify the effects of applying single nucleotide polymorphism (SNP) on net merit to improve the reliability of EBV of later lactation traits to maximize their increased economic importance due to increase in survival rate. Net merit, selection accuracy, and HL increased by adding lactation persistency to the selection index whose component traits were only milk yields. Lactation persistency of the second and (especially) third parities contributed to increasing HL while maintaining the first five lactation milk yields compared with the selection index whose only component traits were milk yields. A selection index comprising the first three lactation milk yields and persistency accounted for 99.4% of net merit derived from a selection index whose components were identical to those for net merit. We consider that the selection index comprising the first three lactation milk yields and persistency is a practical method for increasing lifetime milk yield in the absence of data regarding HL. Applying SNP to the second- and third-lactation traits and HL increased net merit and HL by maximizing the increased economic importance of later lactation traits, reducing the effect of first-lactation milk yield on HL (genetic correlation (rG) = -0.006), and by augmenting the effects of the second- and third-lactation milk yields on HL (rG = 0.118 and 0.257, respectively).
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Affiliation(s)
| | - K. Hagiya
- NARO Hokkaido Agricultural Research Center, Hitsujigaoka 1, Toyohiraku, Sapporo, 062-8555,
Japan
| | - T. Osawa
- National Livestock Breeding Center, Nishigo-mura, Nishishirakawa-gun, Fukushima, 961-8511,
Japan
| | - T. Nakanishi
- National Livestock Breeding Center, Nishigo-mura, Nishishirakawa-gun, Fukushima, 961-8511,
Japan
| | - T. Yamazaki
- NARO Hokkaido Agricultural Research Center, Hitsujigaoka 1, Toyohiraku, Sapporo, 062-8555,
Japan
| | - Y. Nagamine
- NARO Hokkaido Agricultural Research Center, Hitsujigaoka 1, Toyohiraku, Sapporo, 062-8555,
Japan
| | - C.Y. Lin
- Dairy and Swine Research and Development Centre, Agriculture and Agri-Food
Canada, Quebec, J1M 1J3,
Canada
| | | | | | - K. Hayasaka
- NARO Hokkaido Agricultural Research Center, Hitsujigaoka 1, Toyohiraku, Sapporo, 062-8555,
Japan
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Abstract
Petit mal absence has been reported with 3-Hz generalized spike-and-wave discharges induced by secondary bilateral synchrony. Absence seizure may be present in patients with frontal lobe epilepsy. The thalamic rhythmogenic mechanisms responsible for spike-and-wave discharges have been investigated, providing a better understanding of the underlying anatomico-physiological mechanisms. We report the thalamocortical coupling in a patient with frontal absence by performing synchronous ictal single photon emission computed tomography (SPECT) analysis. Ictal SPECT revealed thalamic hyperperfusion combined with ipsilateral frontal cortical hyperperfusion in the patient. Moreover, lateral indexes of cerebral blood flow in the frontal region and thalamus were higher than those from non-epileptic control subjects. Thalamocortical coupling was thus revealed by ictal SPECT. Frontal absences should be considered as a secondarily generalized epilepsy syndrome originating from the frontal regions. The thalamus may play a crucial role as a pacemaker of rhythmic electroencephalographic activities such as secondary bilateral synchronous discharges in patients with frontal absences.
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Affiliation(s)
- H Kanemura
- Department of Pediatrics, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan.
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Inoue Y, Aihara M, Kirino M, Harada I, Komori-Yamaguchi J, Yamaguchi Y, Nagashima Y, Ikezawa Z. Interleukin-18 is elevated in the horny layer in patients with atopic dermatitis and is associated with Staphylococcus aureus colonization. Br J Dermatol 2011; 164:560-7. [PMID: 21087228 DOI: 10.1111/j.1365-2133.2010.10145.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND An increase in interleukin (IL)-18 production from epidermal cells has been reported in an atopic dermatitis (AD) mouse model, and subsequent topical application of Staphylococcus aureus results in severe dermatitis. OBJECTIVES To reveal the relationship between S. aureus colonization of skin lesions and keratinocyte IL-18 production, particularly in AD with relatively low serum IgE levels. We also aimed to establish a simple and noninvasive method of assaying IL-18 produced by epidermal keratinocytes to evaluate local skin inflammation and therapeutic effects in patients with AD. METHODS IL-18 in the horny layer of the skin was collected via a tape-stripping method and measured in 95 patients with AD and 40 healthy controls by enzyme-linked immunosorbent assay (ELISA). Clinical severity, blood data and S. aureus skin colonization were evaluated before and after treatment. RESULTS IL-18 levels in the horny layer were significantly higher in the skin lesions of patients with AD than in healthy controls and correlated with SCORAD, levels of serum IL-18, IgE, lactate dehydrogenase, thymus and activation-regulated chemokine, blood eosinophils and transepidermal water loss. In the AD group with serum IgE < 1500 IU mL(-1) , significantly higher IL-18 levels were observed in the horny layer of patients colonized with S. aureus compared with those who were not. CONCLUSIONS Epidermal IL-18 production was associated with the severity of AD. Staphylococcus aureus colonization seems to contribute to this IL-18 production, especially in the AD group with relatively low IgE production. Tape stripping provides an easy and noninvasive method to assess epidermal IL-18 production by ELISA.
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Affiliation(s)
- Y Inoue
- Department of Environmental Immuno-Dermatology and Department of Molecular Pathology, Yokohama City University Graduate School of Medicine, Kanazawa-ku, Japan
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Inagaki M, Aihara M. [Neuroscience of attention deficit/hyperactivity disorder: special focus on the function of the inhibitory and reward systems]. No To Hattatsu 2010; 42:224-226. [PMID: 23858583] [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: 06/02/2023]
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Matsukura S, Aihara M, Sugawara M, Kunimi Y, Matsuki M, Inoue Y, Kambara T, Ikezawa Z. Two cases of wheat-dependent anaphylaxis induced by aspirin administration but not by exercise. Clin Exp Dermatol 2010; 35:233-7. [DOI: 10.1111/j.1365-2230.2009.03709.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [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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Kamio M, Meguro A, Ota M, Nomura N, Kashiwagi K, Mabuchi F, Iijima H, Kawase K, Yamamoto T, Nakamura M, Negi A, Sagara T, Nishida T, Inatani M, Tanihara H, Aihara M, Araie M, Fukuchi T, Abe H, Higashide T, Sugiyama K, Kanamoto T, Kiuchi Y, Iwase A, Ohno S, Inoko H, Mizuki N. Investigation of the association between the GLC3A locus and normal tension glaucoma in Japanese patients by microsatellite analysis. Clin Ophthalmol 2009; 3:183-8. [PMID: 19668563 PMCID: PMC2708983 DOI: 10.2147/opth.s4727] [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] [Indexed: 12/05/2022] Open
Abstract
Purpose: To investigate whether the GLC3A locus harboring the CYP1B1 gene is associated with normal tension glaucoma (NTG) in Japanese patients. Materials and Methods: One hundred forty-two Japanese patients with NTG and 101 Japanese healthy controls were recruited. Patients exhibiting a comparatively early onset were selected as this suggests that genetic factors may show stronger involvement. Genotyping and assessment of allelic diversity was performed on 13 highly polymorphic microsatellite markers in and around the GLC3A locus. Results: There were decreased frequencies of the 444 allele of D2S0416i and the 258 allele of D2S0425i in cases compared to controls (P = 0.022 and P = 0.034, respectively). However, this statistical significance disappeared when corrected (Pc > 0.05). We did not find any significant association between the remaining 11 microsatellite markers, including D2S177, which may be associated with CYP1B1, and NTG (P > 0.05). Conclusions: Our study showed no association between the GLCA3 locus and NTG, suggesting that the CYP1B1 gene, which is reportedly involved in a range of glaucoma phenotypes, may not be an associated factor in the pathogenesis of NTG.
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Affiliation(s)
- M Kamio
- Department of Ophthalmology, Yokohama City University School of Medicine, Yokohama, Kanagawa, Japan
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Abstract
Epilepsy with continuous spike-waves during slow sleep (CSWS) is characterized by impairment of neuropsychological abilities, frequently associated with behavioral d isorders. These manifestations strongly correlate with frontal lobe dysfunctions. In the present case, an 11-year-old girl presented with progressive behavioral deteriorations after the appearance of electrical status epilepticus in sleep. The duration of CSWS period was 5 months. Serial measurements (at the appearance of the EEG pattern, and 6 months and 1, 2, 3 and 4 years thereafter) of frontal and prefrontal lobe volumes by 3-dimensional magnetic resonance imaging-based volumetry showed growth disturbance of prefrontal lobe volume, particularly prefrontal-to-frontal lobe volume ratio, after the appearance of the EEG pattern when compared with two frontal lobe epilepsy subjects without neuropsychological disorders and 13 control subjects. However, the ratio was restored to the growth ratio and seen to reach control levels, after improvement of the clinical manifestations of CSWS. These results suggest that children with CSWS may be prone to frontal lobe dysfunctions, and that the duration of CSWS period seems to be a significant prognostic factor. The urgent suppression of this EEG abnormality may be necessary to prevent the progression of neuropsychological impairments.
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Affiliation(s)
- H Kanemura
- Department of Pediatrics, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan.
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Nishimoto T, Pellizzon MA, Aihara M, Stylianou IM, Billheimer JT, Rothblat G, Rader DJ. Fish oil promotes macrophage reverse cholesterol transport in mice. Arterioscler Thromb Vasc Biol 2009; 29:1502-8. [PMID: 19574561 DOI: 10.1161/atvbaha.109.187252] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVE Fish oil (FO), and specifically omega 3 fatty acids, has favorable effects on cardiovascular outcomes. The aim of this study was to investigate the effects of FO on the process of macrophage reverse cholesterol transport (RCT) in an in vivo mouse model. METHODS AND RESULTS C57BL/6J mice were fed a FO diet, whereas control mice were fed diets containing alternative sources of fats, soybean oil (SO), and coconut oil (CO) for 4 weeks. Macrophage RCT was assessed by injecting [(3)H]cholesterol-labeled J774 macrophages intraperitoneally into mice. After 48 hours, tissues were harvested and feces were collected. An increase in the excretion of macrophage-derived [(3)H]-tracer recovered in fecal neutral sterols for FO-fed mice was observed (273% versus SO and 182% versus CO). FO also decreased [(3)H]-tracer in hepatic cholesteryl ester compared to SO and CO by 76% and 56%, respectively. To specifically determine the effect of FO on the fate of HDL-derived cholesterol, mice fed FO or SO diets were injected with HDL labeled with [(3)H]cholesteryl oleate, and the disappearance of [(3)H]-tracer from blood and its excretion in feces was measured. There was no significant difference in the fractional catabolic rate of [(3)H]cholesteryl oleate-HDL between the 2 groups. However, there was a 242% increase in the excretion of HDL-derived [(3)H]-tracer recovered in fecal neutral sterols in FO-fed mice, concordant with significantly increased expression of hepatic Abcg5 and Abcg8 mRNA. CONCLUSIONS As measured by this tracer-based assay, FO promoted reverse cholesterol transport, primarily by enhancement of the hepatic excretion of macrophage-derived and HDL-derived cholesterol.
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Affiliation(s)
- Tomoyuki Nishimoto
- Institute for Translational Medicine and Therapeutics, University of Pennsylvania School of Medicine, 421 Curie Boulevard, Philadelphia, PA 19104, USA
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Yanagisawa M, Tomidokoro A, Saito H, Mayama C, Aihara M, Tomita G, Shoji N, Araie M. Atypical retardation pattern in measurements of scanning laser polarimetry and its relating factors. Eye (Lond) 2008; 23:1796-801. [PMID: 19079145 DOI: 10.1038/eye.2008.365] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
PURPOSE To assess the prevalence of atypical retardation pattern (ARP) in scanning laser polarimetry (SLP) with variable corneal compensation (VCC) and enhanced corneal compensation (ECC), and to evaluate the factors relating to typical scan score (TSS). METHODS Measurements of SLP-VCC, SLP-ECC, and the Humphrey field analyzer (HFA) were performed in 105 normal subjects and 82 open-angle glaucoma (OAG) patients. ARP was defined as an SLP image with TSS<80. RESULTS Prevalence of ARP with SLP-VCC was 13.3 and 14.6% in normal and OAG eyes, respectively, and that with SLP-ECC (2.9% and 1.2%) was lower than SLP-VCC (P<0.009). TSS with SLP-VCC was significantly correlated with age (partial correlation coefficient (PCC)=-0.22, P=0.003) and refractive error (PCC=0.26, P<0.001) after adjusting for each other. TSS with SLP-ECC was significantly correlated with neither age nor refractive error (PCC=-0.02, P=0.788; PCC=0.10, P=0.177, respectively). In OAG eyes, mean deviation (MD) of HFA was significantly correlated with TSS with SLP-VCC and SLP-ECC (PCC=0.35, P=0.001; PCC=0.23, P=0.039, respectively). In SLP-VCC, MD was significantly correlated with retinal nerve fibre layer (RNFL) thickness only after excluding eyes with ARP (P<0.001). CONCLUSIONS ARP in SLP-VCC measurements was found in more than 10% of normal or glaucomatous eyes, and TSS was significantly lower in older subjects, more myopic eyes, or eyes with more advanced glaucomatous damage. The presence of ARP disturbs the accuracy of RNFL thickness measurement by SLP-VCC. In SLP-ECC measurements, prevalence of ARP was considerably lower and TSS was not affected by age or refractive error, suggesting the advantages of ECC in clinical practices.
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Affiliation(s)
- M Yanagisawa
- Department of Ophthalmology, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
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Nakane T, Hatakeyama K, Nakamura K, Aihara M, Nakazawa S. Melkersson-Rosenthal syndrome with isolated immunoglobulin E hypogammaglobulinaemia. J Int Med Res 2007; 35:922-5. [PMID: 18035003 DOI: 10.1177/147323000703500623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Melkersson-Rosenthal syndrome (MRS) is a rare disorder classically presenting with a triad of recurrent orofacial swelling, facial palsy and a fissured tongue. This case report describes a case of MRS in a patient with isolated immunoglobulin E (IgE) hypogammaglobulinaemia. The 52-year-old woman presented with puffy eyelids, lower lip swelling and right facial nerve palsy. Fissures of the tongue were also noted. On investigation she was found to have a markedly low serum IgE level. This case report clearly indicates that IgE-mediated reactions do not play a significant role in the development of MRS.
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Affiliation(s)
- T Nakane
- Department of Paediatrics, Faculty of Medicine, University of Yamanashi, Chuo, Japan.
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Hosaka H, Aoyagi K, Aihara M, Yamashiro D, Gotoh Y, Tomoko T, Osada M, Deura S, Shinpei S. Emotion is involved in decision making by prediction of reward – A study of sympathetic skin response. Clin Neurophysiol 2007. [DOI: 10.1016/j.clinph.2007.05.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Aihara M, Nakamura K, Watanabe C, Mitani N, Ikezawa Z. 54: Drug-induced hypersensitivity syndrome in Japan — an analysis of 118 cases studied for HHV-6 reactivation. J Clin Virol 2006. [DOI: 10.1016/s1386-6532(06)70073-7] [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] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kunimatsu S, Tomidokoro A, Saito H, Aihara M, Tomita G, Araie M. Performance of GDx VCC in eyes with peripapillary atrophy: comparison of three circle sizes. Eye (Lond) 2006; 22:173-8. [PMID: 16888640 DOI: 10.1038/sj.eye.6702516] [Citation(s) in RCA: 7] [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] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
PURPOSE A scanning laser polarimetry (GDx VCC) equips three different sized measurement circles. In eyes with peripapillary atrophy (PPA), the GDx measurement becomes inaccurate when the circle falls on PPA. The aim of this study was to evaluate performance of the three circles of GDx measurement in eyes with PPA. METHODS Three different sized circles were compared regarding frequency of PPA, which fell on each circle in 282 open-angle glaucoma (OAG) eyes, reproducibility of GDx parameters in 24 normal and 22 OAG eyes, and ability to detect glaucoma in 50 normal and 50 OAG eyes. RESULTS PPA was observed in 230 (82%) of 282 OAG eyes. PPA fell on the small circle (default setting), medium, and large circles in 119 (43%), 38 (14%), and 12 (4%) of the 280 OAG eyes. Reproducibility of GDx parameters was not significantly different among three circles in normal eyes (P>0.05), whereas coefficients of reproducibility of TSNIT average (P=0.006) and superior average (P=0.035) were smaller in the smaller circles in OAG eyes. GDx parameters significantly correlated (P<0.001), but were significantly different (P<0.05) between the small and medium circles. The area under receiver operating characteristic curves for dividing OAG from normal eyes using GDx parameters was similar between the small and medium circles. CONCLUSIONS If the medium circles were used, obstructing influences of PPA on GDx measurement could be avoided more often in Japanese OAG eyes with similar reproducibility and comparable ability to detect glaucoma compared to those with the default small circle.
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Affiliation(s)
- S Kunimatsu
- Department of Ophthalmology, University of Tokyo Graduate School of Medicine, Tokyo, Japan
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Tanaka J, Kanno H, Aihara M. P3.14 A Study of Clinically Isolated Third Generation Cephalosporin-Resistnat Proteus Mirabilis in Takane Hospital in Japan. J Hosp Infect 2006. [DOI: 10.1016/s0195-6701(06)60057-1] [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: 10/23/2022]
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Monji A, Inoue H, Oshima H, Aihara M, Tomioka M, Kumagai N. Tyrosinase induction and inactivation in normal cultured human melanocytes by endothelin-1. Int J Tissue React 2005; 27:41-9. [PMID: 16035647] [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: 05/03/2023]
Abstract
Since endothelin was found to be expressed in epithelial cells as well as in vascular endothelial cells, the functional regulation of melanocytes with endothelin has been actively investigated. In particular, it has been suggested that endothelin may influence pigmentation and depigmentation, which are mediated by melanocytes. In the present study, we investigated the regulation of melanocyte function and tyrosinase expression by endothelin from the point of view of tyrosinase protein expression and enzyme activity. The influence of endothelins on melanocyte function was assessed. Melanocytes showed a dose-dependent increase in cell proliferation with the addition of endothelin-1. When the confluence of melanocytes was cultured with endothelin-1 for 72 h, tyrosinase activity in melanocytes was significantly and dose-dependently decreased. In contrast, there was no significant change with endothelin-3. However, tyrosinase protein expression of melanocytes was significantly and dose-dependently increased by endothelin-1, but endothelin-3 had no effect. Both the suppression of enzyme activity and the enhanced protein expression were regulated by the ETA receptor antagonist, BQ123. In view of these observations, we conclude that endothelin-1-induced tyrosinase is mediated by ETA receptors. However, the reason for the decrease in the specific activity of tyrosinase remains unknown, and our results suggest that another mechanism underlying the activation of tyrosinase is present in addition to the inductive action of endothelin-1 on tyrosinase.
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Affiliation(s)
- A Monji
- Department of Plastic and Reconstructive Surgery, St. Marianna University School of Medicine, 2-16-1 Sugao, Miyamae, Kawasaki 216-8511, Japan.
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Iriyama A, Yanagi Y, Uchida S, Tamaki Y, Aihara M, Obata R, Inoue Y. Retinal nerve fibre layer damage after indocyanine green assisted vitrectomy. Br J Ophthalmol 2004; 88:1606-7. [PMID: 15548829 PMCID: PMC1772451 DOI: 10.1136/bjo.2004.049999] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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