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Okura T, Nakamura R, Kitao S, Ito Y, Anno M, Matsumoto K, Shoji K, Matsuzawa K, Izawa S, Okura H, Ueta E, Kato M, Imamura T, Taniguchi SI, Yamamoto K. Fasting hepatic insulin clearance reflects postprandial hepatic insulin clearance: a brief report. Diabetol Metab Syndr 2023; 15:261. [PMID: 38115089 PMCID: PMC10731793 DOI: 10.1186/s13098-023-01241-4] [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: 10/08/2023] [Accepted: 12/12/2023] [Indexed: 12/21/2023] Open
Abstract
BACKGROUND Hepatic insulin clearance (HIC) is an important pathophysiology of type 2 diabetes mellitus (T2DM). HIC was reported to decrease in patients with type 2 diabetes and metabolic syndrome. HIC is originally calculated by post-load insulin and C-peptide from the oral glucose tolerance test (OGTT). However, OGTT or meal tolerance tests are a burden for patients, and OGTT is not suitable for overt diabetes due to the risk of hyperglycemia. If we can calculate the HIC from the fasting state, it is preferable. We hypothesized that fasting HIC correlates with postprandial HIC in both participants with T2DM and without diabetes. We investigated whether fasting HIC correlates with postprandial HIC in overt T2DM and nondiabetes subjects (non-DM) evaluated by using glucose clamp and meal load. METHODS We performed a meal tolerance test and hyperinsulinemic-euglycemic clamp in 70 subjects, 31 patients with T2DM and 39 non-DM subjects. We calculated the postprandial C-peptide AUC-to-insulin AUC ratio as the postprandial HIC and the fasting C-peptide-to-insulin ratio as the fasting HIC. We also calculated whole-body insulin clearance from the glucose clamp test. RESULTS The fasting HIC significantly correlated with postprandial HIC in T2DM (r_S = 0.82, P < 0.001). Nondiabetes subjects also showed a significant correlation between fasting and postprandial HIC (r_S = 0.71, P < 0.001). Fasting HIC in T2DM was correlated with BMI, HbA1c, gamma-glutamyl transpeptidase, HOMA-IR, HOMA-beta, M/I, and whole-body insulin clearance. Fasting HIC in nondiabetes subjects was correlated with HOMA-IR and HOMA-beta. CONCLUSIONS These results suggest that fasting HIC is strongly correlated with postprandial HIC in both overt T2DM and non-DM patients, as evaluated by the meal test and glucose clamp method. Fasting HIC could be a convenient marker of HIC.
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Affiliation(s)
- Tsuyoshi Okura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan.
| | - Risa Nakamura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Sonoko Kitao
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Yuichi Ito
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Mari Anno
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Kazuhisa Matsumoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Kyoko Shoji
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Kazuhiko Matsuzawa
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Shoichiro Izawa
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Hiroko Okura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Etsuko Ueta
- School of Health Science, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Masahiko Kato
- School of Health Science, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Takeshi Imamura
- Division of Molecular Pharmacology, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Shin-Ichi Taniguchi
- Department of Community-based Family Medicine, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kazuhiro Yamamoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
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Okura T, Nakamura R, Anno M, Ito Y, Kitao S, Endo S, Taneda N, Matsumoto K, Shoji K, Okura H, Matsuzawa K, Izawa S, Ueta E, Kato M, Imamura T, Taniguchi SI, Yamamoto K. Aldehyde dehydrogenase 2 polymorphism is an important gene for insulin resistance in Japanese patients with type 2 diabetes. Metabol Open 2023; 18:100242. [PMID: 37124127 PMCID: PMC10130494 DOI: 10.1016/j.metop.2023.100242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/08/2023] [Accepted: 04/09/2023] [Indexed: 05/02/2023] Open
Abstract
Background Aldehyde dehydrogenase 2 (ALDH2) is an important enzyme involved in alcohol metabolism. ALDH2 polymorphism has been reported as a risk factor for type 2 diabetes mellitus (T2DM) and is associated with liver insulin resistance due to alcohol consumption in non-diabetic individuals. Herein, we investigated the association between ALDH2 polymorphisms and insulin resistance in patients with T2DM. Methods We performed a meal tolerance test and the hyperinsulinemic-euglycemic clamp on 71 Japanese participants: 34 patients with T2DM, and 37 non-diabetic participants. We analyzed the ALDH2 polymorphism (ALDH2 rs67); GG type was defined as the T2DM high-risk group, compared with the low-risk AG and AA groups. Results Glucose levels were similar in the high- and low-risk T2DM groups. The high-risk group for T2DM showed a significantly higher BMI (p < 0.005), insulin resistance in HOMA-IR (p < 0.05), and Insulin sensitivity index (p < 0.05); however, there were no significant differences in insulin resistance in the clamp test (p = 0.10). Alcohol consumption did not differ significantly between groups (p = 0.66). Non-diabetic participants also showed higher HOMA-IR insulin resistance in the high-risk group (p < 0.05), but insulin resistance levels in the glucose clamp tests (p = 0.56) and insulin secretion were not significant. Conclusion The results suggest that ALDH2 is an important gene associated with insulin resistance and obesity in Japanese patients with type 2 diabetes.
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Affiliation(s)
- Tsuyoshi Okura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
- Corresponding author. Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan.
| | - Risa Nakamura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Mari Anno
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Yuichi Ito
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Sonoko Kitao
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Satomi Endo
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Natsuka Taneda
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kazuhisa Matsumoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kyoko Shoji
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Hiroko Okura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kazuhiko Matsuzawa
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Shoichiro Izawa
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Etsuko Ueta
- School of Health Science, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Masahiko Kato
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Takeshi Imamura
- Division of Molecular Pharmacology, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Shin-ichi Taniguchi
- Department of Community-based Family Medicine, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kazuhiro Yamamoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
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Nagata K, Hayashi K, Kumata K, Satoh Y, Osaki M, Nakayama Y, Kuwamoto S, Ichihara Y, Okura T, Matsuzawa K, Miake J, Fukata S, Imamura T. Epstein-Barr virus reactivation in peripheral B lymphocytes induces IgM-type thyrotropin receptor autoantibody production in patients with Graves' disease. Endocr J 2023. [PMID: 36908137 DOI: 10.1507/endocrj.ej22-0609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/11/2023] Open
Abstract
Epstein-Barr virus (EBV) is a human herpes virus that latently infects B lymphocytes. When EBV is reactivated, host B cells differentiate into plasma cells and produce IgM-dominant antibodies as well as many progeny virions. The aims of the present study were to confirm the IgM dominance of thyrotropin-receptor antibodies (TRAbs) produced by EBV reactivation and investigate the roles of TRAb-IgM in Graves' disease. Peripheral blood mononuclear cells (PBMCs) containing TRAb-producing cells were stimulated for EBV reactivation, and TRAb-IgM and TRAb-IgG were measured by ELISA. TRAb-IgM were purified and TSH-binding inhibitory activities were assessed using a radio-receptor assay. Porcine thyroid follicular epithelial cells were cultured with TRAb-IgM and/or complements to measure the intracellular levels of cAMP and the amount of LDH released. TRAb-IgM/TRAb-IgG (the MG ratio) was examined in sequential serum samples of Graves' disease and compared among groups of thyroid function. The results obtained showed that IgM-dominant TRAb production was induced by EBV reactivation. TRAb-IgM did not inhibit TSH binding to TSH receptors and did not transduce hormone-producing signals. However, it destroyed thyroid follicular epithelial cells with complements. The MG ratio was significantly higher in samples of hyperthyroidism or hypothyroidism than in those with normal function or in healthy controls. A close relationship was observed between TRAb-IgM produced by EBV reactivation and the development and exacerbation of Graves' disease. The present results provide novel insights for the development of prophylaxis and therapeutics for Graves' disease.
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Affiliation(s)
- Keiko Nagata
- Division of Pharmacology, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan
| | - Kazuhiko Hayashi
- Department of Pathology, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan
| | - Keisuke Kumata
- Department of Pathology, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan
| | - Yukio Satoh
- Division of Developmental Biology, School of Life Science, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan
| | - Mitsuhiko Osaki
- Division of Experimental Pathology, School of Life Science, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan
| | - Yuji Nakayama
- Division of Radioisotope Science, Research Initiative Center, Organization for Research Initiative and Promotion, Tottori University, Yonago 683-8503, Japan
| | - Satoshi Kuwamoto
- Department of Pathology, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan
| | - Yoshinori Ichihara
- Division of Pharmacology, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan
| | - Tsuyoshi Okura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Kazuhiko Matsuzawa
- Division of Pharmacology, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Junichiro Miake
- Division of Pharmacology, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan
| | - Shuji Fukata
- Center for Excellence in Thyroid Care, Kuma Hospital, Kobe 650-0011, Japan
| | - Takeshi Imamura
- Division of Pharmacology, Faculty of Medicine, Tottori University, Yonago 683-8503, Japan
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Anno M, Izawa S, Fujioka Y, Matsuzawa K, Saito K, Hikita K, Makishima K, Nosaka K, Takenaka A, Usui T, Yamamoto K. Retroperitoneal paraganglioma with loss of heterozygosity of the von Hippel-Lindau gene: a case report and review of the literature. Endocr J 2022; 69:1137-1147. [PMID: 35466127 DOI: 10.1507/endocrj.ej21-0611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Von Hippel-Lindau (VHL) disease is an autosomal dominant disease related to germline mutations in VHL. In VHL disease, pheochromocytoma develops in 10%-20% of patients because of germline mutations and loss of heterozygosity of VHL. However, the rate of paraganglioma associated with VHL is low compared with that of pheochromocytoma, and the reason is unknown. In this study, we performed germline and somatic mutation analyses of retroperitoneal paraganglioma that developed in a patient with clinically diagnosed VHL disease and investigated the tumorigenic mechanism of paraganglioma. The patient was a 25-year-old woman who was considered to have VHL disease on the basis of her family history. She was referred to our clinic to investigate a tumor at the bifurcation of the common iliac artery. The tumor was diagnosed as retroperitoneal paraganglioma by clinical evaluations. A left renal cell carcinoma was also suspected. Polymerase chain reaction direct sequencing analysis and polymorphic microsatellite analysis within the VHL locus suggested that loss of heterozygosity of VHL was associated with paraganglioma and renal cell carcinoma. Multiplex ligation-dependent probe amplification analysis showed a loss of the copy number of VHL exons in paraganglioma. These results suggest that VHL disease contributes to the development of paraganglioma. A literature review showed no reported common missense variants involved in the progression of paraganglioma. The loss of heterozygosity of VHL can be a tumorigenic mechanism of retroperitoneal paraganglioma in VHL disease. However, the low rate of paraganglioma compared with pheochromocytoma is not explained by their genetic background alone.
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Affiliation(s)
- Mari Anno
- Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago 683-8504, Japan
| | - Shoichiro Izawa
- Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago 683-8504, Japan
| | - Yohei Fujioka
- Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago 683-8504, Japan
| | - Kazuhiko Matsuzawa
- Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago 683-8504, Japan
| | - Kohei Saito
- Center for Diabetes, Endocrinology and Metabolism, Shizuoka Prefectural Hospital, Shizuoka 420-8527, Japan
| | - Katsuya Hikita
- Division of Urology, Tottori University Faculty of Medicine, Yonago 683-8504, Japan
| | - Karen Makishima
- Division of Pathology, Tottori University Faculty of Medicine, Yonago 683-8504, Japan
| | - Kanae Nosaka
- Division of Pathology, Tottori University Faculty of Medicine, Yonago 683-8504, Japan
| | - Atsushi Takenaka
- Division of Urology, Tottori University Faculty of Medicine, Yonago 683-8504, Japan
| | - Takeshi Usui
- Research Support Center, Shizuoka Prefectural Hospital, Shizuoka 420-8527, Japan
- Shizuoka Graduate University of Public Health, Shizuoka 420-0881, Japan
| | - Kazuhiro Yamamoto
- Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago 683-8504, Japan
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Okura T, Nakamura R, Ito Y, Kitao S, Anno M, Endo S, Taneda N, Matsumoto K, Shoji K, Okura H, Matsuzawa K, Izawa S, Ueta E, Kato M, Imamura T, Taniguchi SI, Yamamoto K. Significance of pancreatic duodenal homeobox-1 ( PDX-1) genetic polymorphism in insulin secretion in Japanese patients with type 2 diabetes. BMJ Open Diabetes Res Care 2022; 10:10/5/e002908. [PMID: 36718853 PMCID: PMC9462127 DOI: 10.1136/bmjdrc-2022-002908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 08/20/2022] [Indexed: 02/03/2023] Open
Abstract
INTRODUCTION Pancreatic and duodenal homeobox factor-1 (PDX-1) is an imperative gene for insulin secretion in maturity-onset diabetes of the young 4. PDX-1 gene polymorphism was associated with lower first-phase insulin secretion in a genome-wide association study of intravenous glucose tolerance test. It was not associated with type 2 diabetes risk and insulin secretion in a genome-wide oral glucose tolerance test study. However, there have been no reports of overt type 2 diabetes and insulin resistance evaluation using a glucose clamp. We investigated PDX-1 polymorphism, insulin secretion, and insulin resistance in overt type 2 diabetes. RESEARCH DESIGN AND METHODS We performed a meal tolerance test (MTT) and hyperinsulinemic-euglycemic clamping on 63 Japanese subjects, 30 with type 2 diabetes and 33 non-diabetic. We analyzed the rs1124607 PDX-1 gene polymorphism and defined A/C and C/C as the high-risk group and A/A as the low-risk group. RESULTS HOMA-beta (homeostatic model assessment beta-cell function) was significantly lower in the high-risk group than in the low-risk group for all subjects (72.9±54.2% vs 107.0±63.5%, p<0.05). Glucose levels and glucose area under the curve (AUC) were not significantly different between both the risk groups. The insulin levels at 60 and 120 min and the insulin AUC after MTT were remarkably lower in the high-risk group than those in the low-risk group for all subjects (AUC 75.7±36.7 vs 112.7±59.5, p<0.05). High-risk subjects with type 2 diabetes had significantly lower insulin levels at 30 and 60 min and insulin AUC than low-risk subjects. Non-diabetic high-risk subjects depicted significantly lower insulin levels at 120 and 180 min. There were negligible differences in insulin resistance between the risk groups. CONCLUSIONS These results suggest that the PDX-1 genetic polymorphism is crucial for insulin secretion in Japanese patients with type 2 diabetes.
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Affiliation(s)
- Tsuyoshi Okura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Risa Nakamura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Yuichi Ito
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Sonoko Kitao
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Mari Anno
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Satomi Endo
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Natsuka Taneda
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Kazuhisa Matsumoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Kyoko Shoji
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Hiroko Okura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Kazuhiko Matsuzawa
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Shoichiro Izawa
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Etsuko Ueta
- School of Health Science, Tottori University, Tottori, Japan
| | - Masahiko Kato
- School of Health Science, Tottori University, Tottori, Japan
| | - Takeshi Imamura
- Division of Molecular Pharmacology, Tottori University, Tottori, Japan
| | | | - Kazuhiro Yamamoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University, Tottori, Japan
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Okura T, Fujioka Y, Nakamura R, Ito Y, Kitao S, Anno M, Matsumoto K, Shoji K, Okura H, Matsuzawa K, Izawa S, Ueta E, Kato M, Imamura T, Taniguchi SI, Yamamoto K. Dipeptidyl peptidase 4 inhibitor improves insulin resistance in Japanese patients with type 2 diabetes: a single-arm study, a brief report. Diabetol Metab Syndr 2022; 14:78. [PMID: 35672759 PMCID: PMC9171964 DOI: 10.1186/s13098-022-00850-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 04/24/2022] [Accepted: 05/29/2022] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Dipeptidyl peptidase 4 inhibitor (DPP4i) is an effective medicine for type 2 diabetes mellitus (T2DM). Some articles reported DPP4i improves insulin secretion and insulin resistance. However, these effects are not well established by glucose clamp test and test meal in Japanese. We investigated the effect of DPP4i on insulin resistance and insulin secretion by using the glucose clamp test and meal tolerance test (MTT). METHODS We performed a MTT, and the hyperinsulinemic-euglycemic clamp in 8 Japanese patients with T2DM. This study was a single-arm study. We measured fasting and postprandial glucose, insulin, incretins, and glucagon levels. We also measured serum adiponectin levels. RESULTS HbA1c was significantly decreased after 3 months. The fasting and postprandial glucose levels were significantly decreased. Fasting and postprandial insulin levels were not changed. The insulin resistance derived from the glucose clamp test was significantly improved. HOMA-IR was not significantly changed. GLP-1 and GIP were significantly increased but glucagon did not change. Adiponectin was not significantly changed. CONCLUSIONS Although the number of patients was very small, these results suggested that DPP4i treatment might improve insulin resistance without changing insulin secretion.
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Affiliation(s)
- Tsuyoshi Okura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Faculty of Medicine, Tottori University, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan.
| | - Yohei Fujioka
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Faculty of Medicine, Tottori University, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Risa Nakamura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Faculty of Medicine, Tottori University, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Yuichi Ito
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Faculty of Medicine, Tottori University, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Sonoko Kitao
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Faculty of Medicine, Tottori University, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Mari Anno
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Faculty of Medicine, Tottori University, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Kazuhisa Matsumoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Faculty of Medicine, Tottori University, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Kyoko Shoji
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Faculty of Medicine, Tottori University, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Hiroko Okura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Faculty of Medicine, Tottori University, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Kazuhiko Matsuzawa
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Faculty of Medicine, Tottori University, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Shoichiro Izawa
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Faculty of Medicine, Tottori University, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Etsuko Ueta
- School of Health Science, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Masahiko Kato
- School of Health Science, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Takeshi Imamura
- Division of Molecular Pharmacology, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Shin-Ichi Taniguchi
- Department of Regional Medicine, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Kazuhiro Yamamoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Faculty of Medicine, Tottori University, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
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7
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Matsumoto K, Izawa S, Fukaya K, Matsuda E, Fujiyama M, Matsuzawa K, Okura T, Kato M, Taniguchi SI, Yamamoto K. Hyperthyroidism in Graves Disease Causes Sleep Disorders Related to Sympathetic Hypertonia. J Clin Endocrinol Metab 2022; 107:e1938-e1945. [PMID: 35022743 DOI: 10.1210/clinem/dgac013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Indexed: 11/19/2022]
Abstract
CONTEXT It is well known that Graves disease (GD) causes sleep disorders (SDs). However, the characteristics and associated factors of SD and its clinical course post hyperthyroidism normalization remain unclear. OBJECTIVE To clarify the characteristics and associated factors of subjective SD and its clinical course after GD treatment. METHODS From November 2017 to October 2020, we enrolled 72 participants (22 newly diagnosed with GD with untreated hyperthyroidism, 20 previously diagnosed with GD with normal thyroid function, and 30 normal controls) with no other underlying SD-related diseases. We compared the groups at enrollment and conducted prospective observations after 12 months of treatment on participants with newly diagnosed GD. Main outcome measures were differences and changes in the Pittsburgh Sleep Quality Index (PSQI) global and component sleep quality scores. RESULTS PSQI global sleep quality scores (P = .036) and sleep disturbance scores (P = .011) were significantly different among the 3 groups, and were highest in the untreated hyperthyroidism group. Multiple regression analysis demonstrated that free thyroxine level, which was positively correlated with sympathetic tone (ST) as evaluated by pulse rate, and urinary total metanephrines was associated with poorer PSQI global sleep quality scores independently of other factors (P = .006). Prospective observation showed that PSQI global sleep quality scores (P = .018) and sleep disturbance scores (P = .011) significantly improved with thyroid function normalization and ST attenuation. CONCLUSION Hyperthyroidism caused by GD augmented ST and exacerbated subjective SD. Normalization of hyperthyroidism caused by GD improved subjective SD.
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Affiliation(s)
- Kazuhisa Matsumoto
- Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Japan
| | - Shoichiro Izawa
- Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Japan
| | - Kenji Fukaya
- Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Japan
| | - Eriko Matsuda
- Division of Otolaryngology, Head and Neck Surgery, Tottori University Faculty of Medicine, Yonago, Japan
| | - Misato Fujiyama
- Division of Otolaryngology, Head and Neck Surgery, Tottori University Faculty of Medicine, Yonago, Japan
| | - Kazuhiko Matsuzawa
- Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Japan
| | - Tsuyoshi Okura
- Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Japan
| | - Masahiko Kato
- Division of Pathobiological Science and Technology, Tottori University Faculty of Medicine, Yonago, Japan
| | - Shin-Ichi Taniguchi
- Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago, Japan
| | - Kazuhiro Yamamoto
- Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Japan
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8
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Okura T, Fujioka Y, Nakamura R, Kitao S, Ito Y, Anno M, Matsumoto K, Shoji K, Matsuzawa K, Izawa S, Okura H, Ueta E, Kato M, Imamura T, Taniguchi SI, Yamamoto K. The sodium-glucose cotransporter 2 inhibitor ipragliflozin improves liver function and insulin resistance in Japanese patients with type 2 diabetes. Sci Rep 2022; 12:1896. [PMID: 35115614 PMCID: PMC8814145 DOI: 10.1038/s41598-022-05704-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 01/18/2022] [Indexed: 11/26/2022] Open
Abstract
Sodium–glucose cotransporter 2 inhibitor (SGLT2i) treatment is a therapeutic approach for type 2 diabetes mellitus (T2DM). Some reports have shown that SGLT2i treatment improves insulin resistance; however, few studies have evaluated insulin resistance by the glucose clamp method. Hepatic insulin clearance (HIC) is a new pathophysiological mechanism of T2DM. The effect of SGLT2i treatment on hepatic insulin clearance and insulin resistance is not well known. We investigated the effect of SGLT2i treatment on insulin resistance, insulin secretion, incretin levels, body composition, and hepatic insulin clearance. We conducted a meal tolerance test (MTT) and a hyperinsulinemic-euglycemic clamp test in 9 T2DM patients. Ipragliflozin (50 mg/day) was administered, and the MTT and clamp test were performed after 4 months. We calculated HIC as the postprandial C-peptide AUC-to-insulin AUC ratio. We also measured GLP-1, GIP, and glucagon levels during the MTT. Body weight and HbA1c were decreased, although not significantly, after 4 months of treatment. Postprandial glucose, fasting insulin and postprandial insulin were significantly decreased. Insulin resistance with the glucose clamp was not changed, but the HOMA-IR and insulin sensitivity indices were significantly improved. Incretin and glucagon levels were not changed. Hepatic insulin clearance was significantly increased, but whole-body insulin clearance was not changed. The FIB-4 index and fatty liver index were significantly reduced. The HOMA-beta and insulinogenic indices were not changed, but the C-peptide index was significantly increased. Although the number of patients was small, these results suggested that SGLT2i treatment improved liver function, decreased hepatic insulin resistance, and increased hepatic insulin clearance, despite the small weight reduction.
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Affiliation(s)
- Tsuyoshi Okura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-Cho, Yonago, Tottori, 683-8504, Japan.
| | - Yohei Fujioka
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-Cho, Yonago, Tottori, 683-8504, Japan
| | - Risa Nakamura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-Cho, Yonago, Tottori, 683-8504, Japan
| | - Sonoko Kitao
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-Cho, Yonago, Tottori, 683-8504, Japan
| | - Yuichi Ito
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-Cho, Yonago, Tottori, 683-8504, Japan
| | - Mari Anno
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-Cho, Yonago, Tottori, 683-8504, Japan
| | - Kazuhisa Matsumoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-Cho, Yonago, Tottori, 683-8504, Japan
| | - Kyoko Shoji
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-Cho, Yonago, Tottori, 683-8504, Japan
| | - Kazuhiko Matsuzawa
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-Cho, Yonago, Tottori, 683-8504, Japan
| | - Shoichiro Izawa
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-Cho, Yonago, Tottori, 683-8504, Japan
| | - Hiroko Okura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-Cho, Yonago, Tottori, 683-8504, Japan
| | - Etsuko Ueta
- School of Health Science, Tottori University Faculty of Medicine, Yonago, Japan
| | - Masahiko Kato
- School of Health Science, Tottori University Faculty of Medicine, Yonago, Japan
| | - Takeshi Imamura
- Division of Molecular Pharmacology, Tottori University Faculty of Medicine, Yonago, Japan
| | - Shin-Ichi Taniguchi
- Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago, Japan
| | - Kazuhiro Yamamoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-Cho, Yonago, Tottori, 683-8504, Japan
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9
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Izawa S, Matsumoto K, Matsuzawa K, Katabami T, Yoshimoto T, Otsuki M, Sone M, Takeda Y, Okamura S, Ichijo T, Tsuiki M, Suzuki T, Naruse M, Tanabe A. Sex Difference in the Association of Osteoporosis and Osteopenia Prevalence in Patients with Adrenal Adenoma and Different Degrees of Cortisol Excess. Int J Endocrinol 2022; 2022:5009395. [PMID: 35340678 PMCID: PMC8956375 DOI: 10.1155/2022/5009395] [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] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 01/27/2022] [Accepted: 02/23/2022] [Indexed: 12/02/2022] Open
Abstract
OBJECTIVE Osteoporosis and osteopenia (OS/OP) are frequent in patients with adrenal adenomas associated with cortisol excess (CE). However, the relationship between OS/OP and CE severity considering sex differences is unknown. DESIGN A cross-sectional observational study from January 2006 to December 2015. Patients. 237 patients with adrenal adenoma associated with CE, including Cushing's syndrome and mild autonomous cortisol secretion (MACS), diagnosed in 10 referral centers in Japan. MACS was defined by 1 mg overnight dexamethasone suppression test (DST) cortisol level >1.8 μg/dL. Measurements. Prevalence of fragility fractures, medication for osteoporosis, and bone mineral density. RESULTS In total, 112 of 237 patients, who were predominantly female (P < 0.001) and had lower BMI (P=0.013), had OS/OP. Patients with OS/OP was significantly affected by CE (P < 0.01) than those without. The adjusted odds ratio (OR) for predicting OS/OP was obtained in multivariate logistic regression analysis. Clinical measures of CE, 1 mg DST cortisol levels, were positively associated with OS/OP in total cases (OR 1.124, 95% CI: 1.070-1.181, P < 0.001) and the cases with MACS (OR 1.156, 95%CI: 1.046-1.278, P=0.005). A cutoff value of 1 mg DST cortisol level >5.0 μg/dL was associated with OS/OP differently between men and women. OS/OP risk in men with MACS was significantly affected only by 1 mg DST cortisol levels. However, OS/OP risk in women with MACS was significantly affected by 1 mg DST cortisol levels and age. CONCLUSIONS CE severity in adrenal adenoma is positively associated with OS/OP. However, the associated factors of OS/OP in the patients with MACS are different between men and women.
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Affiliation(s)
- Shoichiro Izawa
- Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Japan
| | - Kazuhisa Matsumoto
- Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Japan
| | - Kazuhiko Matsuzawa
- Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Japan
| | - Takuyuki Katabami
- Division of Metabolism and Endocrinology, Department of Internal Medicine, St. Marianna University School of Medicine, Yokohama City Seibu Hospital, Yokohama, Japan
| | - Takanobu Yoshimoto
- Department of Molecular Endocrinology and Metabolism, Tokyo Medical and Dental University, Tokyo, Japan
| | - Michio Otsuki
- Department of Metabolic Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
- Department of Endocrinology, Tokyo Women's Medical University, Tokyo, Japan
| | - Masakatsu Sone
- Department of Diabetes, Endocrinology and Nutrition, Kyoto University, Kyoto, Japan
- Division of Metabolism and Endocrinology, Department of Internal Medicine, St. Marianna University School of Medicine, Kawasaki, Japan
| | - Yoshiyu Takeda
- Department of Internal Medicine, Graduate School of Medical Science, Kanazawa University, Kanazawa, Japan
| | | | - Takamasa Ichijo
- Department of Diabetes and Endocrinology, Saiseikai Yokohamashi Tobu Hospital, Yokohama, Japan
| | - Mika Tsuiki
- Department of Endocrinology and Metabolism, National Hospital Organization Kyoto Medical Center, Kyoto, Japan
| | - Tomoko Suzuki
- Department of Public Health, International University of Health and Welfare School of Medicine, Narita, Japan
| | - Mitsuhide Naruse
- Clinical Research Institute of Endocrinology and Metabolism, National Hospital Organization Kyoto Medical Center, Kyoto, Japan
- Endocrine Center, Ijinkai Takeda General Hospital, Kyoto, Japan
| | - Akiyo Tanabe
- Division of Endocrinology, National Center for Global Health and Medicine, Tokyo, Japan
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10
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Suzuki Y, Edama M, Kaneko F, Ikezu M, Matsuzawa K, Hirabayashi R, Kageyama I. Morphological characteristics of the Lisfranc ligament. J Foot Ankle Res 2020; 13:46. [PMID: 32677989 PMCID: PMC7364469 DOI: 10.1186/s13047-020-00412-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 04/24/2020] [Accepted: 07/02/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND This study aimed to clarify the morphological characteristics of the Lisfranc ligament and the cuneiform 1-metatarsal 2&3 plantar ligament (CMPL). METHODS Forty legs from 20 cadavers were examined. Classification proceeded according to the number of fiber bundles in the Lisfranc ligament and the CMPL. Morphological features measured were fiber bundle length, width, thickness, and angle. RESULTS In Type I-a, the Lisfranc ligament and the CMPL were a single fiber bundle; in Type I-b, the Lisfranc ligament was a single fiber bundle, and the CMPL was two fiber bundles; in Type II-a, the Lisfranc ligament was a two fiber bundle, and the CMPL was a single fiber bundle; in Type II-b, the Lisfranc ligament and the CMPL were two fiber bundles; in Type III-a, the Lisfranc ligament was three fiber bundles, and the CMPL was a single fiber bundle; in Type III-b, the Lisfranc ligament was three fiber bundles, and the CMPL was two fiber bundles; in Type IV, the Lisfranc ligament and the CMPL could not be separated. Type I-a was seen in 37.5%, Type I-b in 10%, Type II-a in 30%, Type II-b in 7.5%, Type III-a in 7.5%, Type III-b in 2.5%, and Type IV in 5%. The Lisfranc ligament was significantly larger than the CMPL in total fiber bundle width, total fiber bundle thickness, and total fiber bundle angle. CONCLUSION The Lisfranc ligament had up to 3 fiber bundles and the CMPL had one or two fiber bundles; classifications were four types and two subgroups.
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Affiliation(s)
- Y Suzuki
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - M Edama
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan. .,Department of Anatomy, School of Life Dentistry at Niigata, Nippon Dental University, Niigata, Japan.
| | - F Kaneko
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - M Ikezu
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - K Matsuzawa
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - R Hirabayashi
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan
| | - I Kageyama
- Department of Anatomy, School of Life Dentistry at Niigata, Nippon Dental University, Niigata, Japan
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11
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Matsuzawa K, Izawa S, Kato A, Fukaya K, Matsumoto K, Okura T, Miyazaki D, Kurosaki M, Fujii S, Taniguchi SI, Kato M, Yamamoto K. Low signal intensities of MRI T1 mapping predict refractory diplopia in Graves' ophthalmopathy. Clin Endocrinol (Oxf) 2020; 92:536-544. [PMID: 32090348 DOI: 10.1111/cen.14178] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 02/06/2020] [Accepted: 02/14/2020] [Indexed: 12/20/2022]
Abstract
OBJECTIVE In Graves' ophthalmopathy (GO), fibrosis in extraocular muscles (EOMs) may be related to intravenous glucocorticoid (ivGC)-resistant diplopia. Signal intensity (SI) of magnetic resonance imaging (MRI) T1 mapping can quantify properties of EOM components, including fibrosis. We investigated EOM features of GO patients with diplopia using T1 mapping SI and the predictive value of T1 mapping SI in the response of diplopia to ivGCs. DESIGN We performed a cross-sectional study that included 13 active GO patients, 34 inactive GO patients with history of diplopia, including 20 with a history of diplopia disappearance, 14 GO patients with refractory diplopia and 35 control subjects. In nine active GO patients, the relationship between T1 mapping SI at pretreatment and at diplopia outcome after ivGC treatment was prospectively investigated. METHODS T1 mapping SI of left and right inferior rectus and medial rectus muscles was measured in all participants. RESULTS T1 mapping SI in inactive GO patients with refractory diplopia was significantly lower than that of other groups in all evaluated EOMs. Diagnostic accuracy for refractory diplopia by T1 mapping SI in GO patients with a history of diplopia disappearance was excellent (AUC 0.89) compared with other assessments. Furthermore, among nine active GO patients, pretreatment T1 mapping SI in four patients with ivGC-resistant diplopia tended to be low compared with the other five patients with improved diplopia. CONCLUSIONS Low intensity T1 mapping in EOMs is likely to be associated with refractory diplopia and may be useful in predicting the response of diplopia to ivGCs.
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Affiliation(s)
- Kazuhiko Matsuzawa
- Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Shoichiro Izawa
- Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Ayumi Kato
- Division of Radiology, Department of Pathophysiological and Therapeutic Science, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Kenji Fukaya
- Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Kazuhisa Matsumoto
- Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Tsuyoshi Okura
- Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Dai Miyazaki
- Department of Ophthalmology, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Masamichi Kurosaki
- Division of Neurosurgery, Department of Brain and Neurosciences, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Shinya Fujii
- Division of Radiology, Department of Pathophysiological and Therapeutic Science, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Shin-Ichi Taniguchi
- Department of Regional Medicine, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Masahiko Kato
- Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Faculty of Medicine, Tottori University, Yonago, Japan
| | - Kazuhiro Yamamoto
- Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Faculty of Medicine, Tottori University, Yonago, Japan
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12
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Okura T, Fujioka Y, Nakamura R, Anno M, Ito Y, Kitao S, Matsumoto K, Shoji K, Sumi K, Matsuzawa K, Izawa S, Okura H, Ueta E, Noma H, Kato M, Imamura T, Taniguchi SI, Yamamoto K. Hepatic insulin clearance is increased in patients with high HbA1c type 2 diabetes: a preliminary report. BMJ Open Diabetes Res Care 2020; 8:8/1/e001149. [PMID: 32354719 PMCID: PMC7213752 DOI: 10.1136/bmjdrc-2019-001149] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 12/23/2019] [Revised: 03/16/2020] [Accepted: 04/06/2020] [Indexed: 12/23/2022] Open
Abstract
INTRODUCTION Hepatic insulin clearance (HIC) is an important pathophysiology of type 2 diabetes. HIC was reported to decrease in patients with type 2 diabetes and metabolic syndrome. However, hyperglycemia was suggested to enhance HIC, and it is not known whether poorly controlled diabetes increases HIC in patients with type 2 diabetes. We investigated whether HIC was increased in patients with poorly controlled diabetes, and whether HIC was associated with insulin resistance and incretins. RESEARCH DESIGN AND METHODS We performed a meal tolerance test and the hyperinsulinemic-euglycemic clamp in 21 patients with type 2 diabetes. We calculated the postprandial C-peptide area under the curve (AUC)-to-insulin AUC ratio as the HIC; measured fasting and postprandial glucagon-like peptide-1 (GLP-1), glucose-dependent insulinotropic polypeptide (GIP) and glucagon levels and analyzed serum adiponectin and zinc transporter-8 (ZnT8) gene polymorphism. RESULTS The HIC significantly correlated with glycated hemoglobin (HbA1c) (r_S=0.58, p<0.01). In patients with high HIC above the median of 6.5, the mean HbA1c was significantly higher compared with low HIC below the median. Homeostatic model assessment (HOMA)-beta (r_S=-0.77, p<0.01) and HOMA-IR (r_S=-0.66, p<0.005) were correlated with HIC. The M/I value in the clamp study was correlated with HIC. GLP-1-AUC and GIP-AUC were not correlated with HIC. Glucagon-AUC was negatively correlated with HIC, but there were no significant differences between the high and low HIC groups. Adiponectin was positively correlated with HIC. The ZnT8 gene polymorphism did not affect HIC. CONCLUSIONS These results suggest that HIC was increased in patients with high HbA1c type 2 diabetes, low insulin secretion, low insulin resistance and high adiponectin conditions.
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Affiliation(s)
- Tsuyoshi Okura
- Division of Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Yohei Fujioka
- Division of Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Risa Nakamura
- Division of Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Mari Anno
- Division of Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Yuichi Ito
- Division of Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Sonoko Kitao
- Division of Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Kazuhisa Matsumoto
- Division of Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Kyoko Shoji
- Division of Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Keisuke Sumi
- Division of Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Kazuhiko Matsuzawa
- Division of Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Shoichiro Izawa
- Division of Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Hiroko Okura
- Division of Endocrinology and Metabolism, Tottori University, Tottori, Japan
| | - Etsuko Ueta
- School of Health Science, Tottori University, Tottori, Japan
| | - Hisashi Noma
- Institute of Statistical Mathematics, Minato-ku, Tokyo, Japan
| | - Masahiko Kato
- School of Health Science Major in Clinical Laboratory Science, Tottori University, Tottori, Japan
| | - Takeshi Imamura
- Division of Molecular Pharmacology, Tottori University, Tottori, Japan
| | | | - Kazuhiro Yamamoto
- Division of Endocrinology and Metabolism, Tottori University, Tottori, Japan
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13
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Shimizu S, Edama M, Ikezu M, Matsuzawa K, Kaneko F, Kageyama I. Morphological features of the posterior oblique ligament of the ulnar collateral ligament of the elbow joint. Surg Radiol Anat 2020; 42:243-248. [PMID: 31980894 DOI: 10.1007/s00276-020-02423-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 10/22/2019] [Accepted: 01/13/2020] [Indexed: 11/29/2022]
Abstract
PURPOSE The purpose of this basic research study was to clarify the morphological characteristics of the posterior oblique fibers (POL) of the ulnar collateral ligament using a large number of specimens. METHODS This study examined 50 arms from 25 Japanese cadavers. Type classification was performed by focusing on the positional relationship between POL morphology and the joint capsule. The morphological features measured were fiber bundle length, width, and thickness. RESULTS The POL was classified as follows: Type I, the POL's anterior and posterior edges are located on the surface of the joint capsule and can be separated as a single fiber bundle; Type II-a, the POL anterior edge can be separated, but the posterior edge cannot be separated; Type II-b, the POL posterior edge can be separated, but the anterior edge cannot be separated; and Type III, the POL cannot be separated from the joint capsule. Type I was seen in 23 elbows (46%), Type II-a in 6 elbows (12%), Type II-b in 7 elbows (14%), and Type III in 14 elbows (28%). CONCLUSION The results of this study suggested that the POL could be classified into an independent type and an unclear type, and the presence of the unclear type was one of the factors that caused morphological variation.
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Affiliation(s)
- S Shimizu
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Kita-ku, Niigata City, 950-3198, Japan
| | - M Edama
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Kita-ku, Niigata City, 950-3198, Japan. .,Department of Anatomy, School of Life Dentistry at Niigata, Nippon Dental University, Niigata, Japan.
| | - M Ikezu
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Kita-ku, Niigata City, 950-3198, Japan
| | - K Matsuzawa
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Kita-ku, Niigata City, 950-3198, Japan
| | - F Kaneko
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Kita-ku, Niigata City, 950-3198, Japan
| | - I Kageyama
- Department of Anatomy, School of Life Dentistry at Niigata, Nippon Dental University, Niigata, Japan
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14
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Edama M, Takabayashi T, Inai T, Hirabayashi R, Ikezu M, Kaneko F, Matsuzawa K, Kageyama I. Morphological features of the cervical ligament. Surg Radiol Anat 2019; 42:215-218. [PMID: 31676928 DOI: 10.1007/s00276-019-02364-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Accepted: 10/17/2019] [Indexed: 11/26/2022]
Abstract
PURPOSE The purpose of this study was to clarify the morphological characteristics of the cervical ligament (CL). METHODS This study examined 80 legs from 40 Japanese cadavers. The CL was classified by the number of fiber bundles. The morphological features measured were fiber bundle length, width, thickness, and angle with the sagittal plane. RESULTS The CL was classified as follows: Type I, the CL is a single fiber; Type II, the CL consists of a superficial fiber and an inferior fiber; and Type III, the CL consists of a superficial fiber, intermediate fiber, and inferior fiber. Type I was seen in 15 feet, Type II in 57 feet, and Type III in 8 feet. In comparisons of morphological features within each type, significant differences were seen in fiber bundle length, width, and angle between superior fiber bundles and inferior fiber bundles of Type II and Type III. In comparison among types, the total fiber bundle width was significantly wider in Type II and Type III than in Type I, and the angle was significantly smaller in Type III than in Type I. CONCLUSION The results of this study suggested that each type may have different sub-talar joint control functions.
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Affiliation(s)
- M Edama
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Kita-ku, Niigata, 950-3198, Japan.
| | - T Takabayashi
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Kita-ku, Niigata, 950-3198, Japan
| | - T Inai
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Kita-ku, Niigata, 950-3198, Japan
| | - R Hirabayashi
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Kita-ku, Niigata, 950-3198, Japan
| | - M Ikezu
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Kita-ku, Niigata, 950-3198, Japan
| | - F Kaneko
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Kita-ku, Niigata, 950-3198, Japan
| | - K Matsuzawa
- Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Shimami-cho 1398, Kita-ku, Niigata, 950-3198, Japan
| | - I Kageyama
- Department of Anatomy, School of Life Dentistry at Niigata, Nippon Dental University, Niigata, Japan
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Matsumoto K, Izawa S, Fukaya K, Matsuda E, Fujiyama M, Matsuzawa K, Ohkura T, Kato M, Taniguchi SI, Yamamoto K. MON-595 Clinical Characteristics of Obstructive Sleep Apnea in Grave's Disease with Normal Thyroid Function. J Endocr Soc 2019. [PMCID: PMC6550748 DOI: 10.1210/js.2019-mon-595] [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] [Indexed: 11/19/2022] Open
Abstract
Background: The prevalence of obstructive sleep apnea (OSA) is increasing and is related to obesity, hypertension and cardiovascular events. Hormonal abnormalities due to hypothyroidism and large goiter can cause OSA. However, the association between OSA and Graves' disease (GD) is not studied well. GD is a major cause of thyrotoxicosis associated with various symptoms like weight loss, palpitations, and hyperhidrosis. After the treatment for normalizing thyroid function, patients sometimes experience metabolic abnormality, like weight gain and dyslipidemia. The objective of our study is to explore clinical characteristics of OSA coexisting with GD. Patients and Method: Patients diagnosed as GD with normalized thyroid function by anti-thyroid medications, radioiodine therapy, and surgery were enrolled from September 1st, 2017 to September 30th, 2018 in accordance with written informed consent. Normal thyroid function was defined by serum Free T4 level ranging from 0.8 ng/dL to 1.7 ng/dL. Patients were undergone polysomnography, and OSA was defined by apnea-hypopnea index greater than 5 times/hour. Patients were divided into 2 groups according to the existence of OSA. Patient’s profile including age, physical signs, disease duration from diagnosis to entry, thyroid function test, and data from polysomnography were obtained and analyzed between the two groups. Results: Sixteen patients aged 46.4 ± 13.0 years (2 male,14 female) were included in this study. Eight of 16 patients (50 %) were categorized into OSA positive group (OSA+). There were no significant differences between OSA+ and OSA negative group (OSA-) in gender, body mass index (BMI), disease duration, and thyroid function test, though BMI tended to be higher in OSA+ (data not shown). Mean Age of OSA+ was significantly higher than that of OSA- (53.6 ± 12.0 vs 39.3 ± 10.0 years, p < 0.05). In addition, systolic blood pressure (136.8 ± 10.0 vs 117.9 ± 11.8 mmHg, p <0.05) and diastolic blood pressure (79.4 ± 5.2 vs 70.3 ± 6.5 mmHg, p <0.05) of OSA+ were significantly higher than those of OSA-. Conclusions: Our findings suggested that the prevalence of OSA in GD after normalizing thyroid function might be higher than that of general populations in Japan. Furthermore, OSA was experienced in GD with higher age and higher blood pressure, even though their thyroid function was normalized. Persistent hypertension after normalizing thyroid function may be associated with OSA especially in elderly patients with GD.
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Affiliation(s)
- Kazuhisa Matsumoto
- Endocrinology and Metabolism, Division of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, , Japan
| | - Shoichiro Izawa
- First Dept of Internal Medicine, Endocrinology and Metabolism, Division of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, , Japan
| | - Kenji Fukaya
- Endocrinology and Metabolism, Division of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, , Japan
| | - Eriko Matsuda
- Division of Otolarygology, Head and Neck Surgery, Tottori University Faculty of Medicine, Yonago, , Japan
| | - Misato Fujiyama
- Division of Otolarygology, Head and Neck Surgery, Tottori University Faculty of Medicine, Yonago, , Japan
| | - Kazuhiko Matsuzawa
- Endocrinology and Metabolism, Division of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, , Japan
| | - Tsuyoshi Ohkura
- Endocrinology and Metabolism, Division of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, , Japan
| | - Masahiko Kato
- Endocrinology and Metabolism, Division of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, , Japan
| | - Shin-ichi Taniguchi
- Multidisciplinary Int Med, Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago, , Japan
| | - Kazuhiro Yamamoto
- Endocrinology and Metabolism, Division of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, , Japan
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16
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Nakamura R, Okura T, Fujioka Y, Sumi K, Matsuzawa K, Izawa S, Ueta E, Kato M, Taniguchi SI, Yamamoto K. Correction: Serum fatty acid-binding protein 4 (FABP4) concentration is associated with insulin resistance in peripheral tissues, A clinical study. PLoS One 2019; 14:e0210932. [PMID: 30640959 PMCID: PMC6331087 DOI: 10.1371/journal.pone.0210932] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
[This corrects the article DOI: 10.1371/journal.pone.0179737.].
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17
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Okura T, Nakamura R, Fujioka Y, Kawamoto-Kitao S, Ito Y, Matsumoto K, Shoji K, Sumi K, Matsuzawa K, Izawa S, Ueta E, Kato M, Imamura T, Taniguchi SI, Yamamoto K. Body mass index ≥23 is a risk factor for insulin resistance and diabetes in Japanese people: A brief report. PLoS One 2018; 13:e0201052. [PMID: 30028879 PMCID: PMC6054391 DOI: 10.1371/journal.pone.0201052] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 07/07/2018] [Indexed: 12/24/2022] Open
Abstract
Background Screening for undiagnosed type 2 diabetes mellitus is recommended for Asian Americans with a body mass index ≥23. However, the optimal body mass index cut-off score for predicting the risk of diabetes mellitus in Japanese people is not well known. The aim of this study was to determine the best body mass index cut-off score for predicting insulin resistance and diabetes mellitus in the Japanese population. Methods This study had two parts, a clinical investigation and a retrospective observational investigation. In the clinical part of the study, 58 participants (26 with type 2 diabetes mellitus and 32 non-diabetics) underwent a hyperinsulinemic-euglycemic clamp from which their glucose disposal rate was measured. For the retrospective part of the study, medical check-up data from 88,305 people in the Tottori Prefecture were analyzed for clinical evidence of diabetes mellitus. The optimal BMI cut-off scores for prediction of insulin resistance and diabetes mellitus were determined. Results In the clamp study, the optimal body mass index cut-off score to predict insulin resistance in non-diabetic patients was 22.7. All participants with type 2 diabetes mellitus were insulin resistant, and the optimal body mass index cut-off score for prediction of severe insulin resistance was 26.2. When the data from the type 2 diabetic and the non-diabetic participants were combined, the optimal body mass index cut-off score for prediction of insulin resistance was 23.5. Analysis of 88,305 medical check-up records yielded an optimal body mass index cut-off score for prediction of diabetes mellitus of 23.6. Conclusions These results suggest that having a body mass index ≥23 is a risk factor for insulin resistance and diabetes mellitus in the Japanese population.
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Affiliation(s)
- Tsuyoshi Okura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
- * E-mail:
| | - Risa Nakamura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Yohei Fujioka
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Sonoko Kawamoto-Kitao
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Yuichi Ito
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kazuhisa Matsumoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kyoko Shoji
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Keisuke Sumi
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kazuhiko Matsuzawa
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Shoichiro Izawa
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Etsuko Ueta
- School of Health Science, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Masahiko Kato
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Takeshi Imamura
- Division of Molecular Pharmacology, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Shin-ichi Taniguchi
- Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kazuhiro Yamamoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
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18
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Okura T, Nakamura R, Fujioka Y, Kawamoto-Kitao S, Ito Y, Matsumoto K, Shoji K, Sumi K, Matsuzawa K, Izawa S, Ueta E, Kato M, Imamura T, Taniguchi SI, Yamamoto K. CPR-IR is an insulin resistance index that is minimally affected by hepatic insulin clearance-A preliminary research. PLoS One 2018; 13:e0197663. [PMID: 29791512 PMCID: PMC5965889 DOI: 10.1371/journal.pone.0197663] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 05/07/2018] [Indexed: 01/23/2023] Open
Abstract
Background Increased hepatic insulin clearance (HIC) is important in the pathophysiology of type 2 diabetes mellitus (T2DM). The aim of this study is to analyze an effective insulin resistance (IR) index that is minimally affected by HIC. Methods Our study involved 20 participants with T2DM and 21 healthy participants without diabetes (Non-DM). Participants underwent a meal tolerance test from which plasma glucose, insulin and serum C-peptide immunoreactivity (CPR) were measured, and HOMA-IR and HIC were calculated. Participants then underwent a hyperinsulinemic-euglycemic clamp from which the glucose disposal rate (GDR) was measured. Results The index CPR-IR = 20/(fasting CPR × fasting plasma glucose) was correlated more strongly with GDR, than was HOMA-IR, and CPR-IR could be used to estimate GDR. In T2DM participants with HIC below the median, HOMA-IR and CPR-IR were equally well correlated with GDR. In T2DM with high HIC, CPR-IR correlated with GDR while HOMA-IR did not. In Non-DM, CPR-IR and HOMA-IR were equally well correlated with GDR regardless of HIC. The mean HIC value in T2DM was significantly higher than that of Non-DM. Conclusions CPR-IR could be a simple and effective index of insulin resistance for patients with type 2 diabetes that is minimally affected by HIC.
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Affiliation(s)
- Tsuyoshi Okura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
- * E-mail:
| | - Risa Nakamura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Yohei Fujioka
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Sonoko Kawamoto-Kitao
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Yuichi Ito
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kazuhisa Matsumoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kyoko Shoji
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Keisuke Sumi
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kazuhiko Matsuzawa
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Shoichiro Izawa
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Etsuko Ueta
- School of Health Science, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Masahiko Kato
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Takeshi Imamura
- Division of Molecular Pharmacology, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Shin-ichi Taniguchi
- Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kazuhiro Yamamoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
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Fujioka Y, Okura T, Sumi K, Matsumoto K, Shoji K, Nakamura R, Matsuzawa K, Izawa S, Kato M, Taniguchi S, Yamamoto K. Normal meal tolerance test is preferable to the glucagon stimulation test in patients with type 2 diabetes that are not in a hyperglycemic state: Comparison with the change of C-peptide immunoreactivity. J Diabetes Investig 2018; 9:274-278. [PMID: 28494143 PMCID: PMC5835464 DOI: 10.1111/jdi.12692] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Revised: 04/22/2017] [Accepted: 05/01/2017] [Indexed: 12/01/2022] Open
Abstract
AIMS/INTRODUCTION The aim of the present study was to evaluate the properties of the glucagon stimulation test (GST) and the normal meal tolerance test (NMTT) in patients with type 2 diabetes. MATERIALS AND METHODS We enrolled 142 patients with type 2 diabetes, and carried out a GST and a NMTT. We carried out the NMTT using a calorie-controlled meal based on an intake of 30 kcal/kg ideal bodyweight/day. We calculated the change in C-peptide immunoreactivity (ΔCPR) by subtracting fasting CPR from the CPR 6 min after the 1-mg glucagon injection (GST) or 120 min after the meal (NMTT). RESULTS Mean ΔCPR for the GST was 2.0 ng/mL, and for the NMTT was 3.1 ng/mL. A total of 104 patients had greater ΔCPR in the NMTT than the GST, and the mean ΔCPR was significantly greater in the NMTT than the GST (P < 0.05). To exclude any influence of antidiabetic drugs, we examined 42 individuals not taking antidiabetic agents, and found the mean ΔCPR was significantly greater in the NMTT than the GST (GST 2.4 ng/mL, NMTT 4.3 ng/mL; P < 0.05). To consider the influence of glucose toxicity, we carried out receiver operating characteristic analyses with fasting plasma glucose and glycated hemoglobin. The optimal cut-off levels predicting GST ΔCPR to be larger than NMTT ΔCPR were fasting plasma glucose 147 mg/dL and glycated hemoglobin 9.0% (fasting plasma glucose: sensitivity 0.64, specificity 0.76, area under the curve 0.73; glycated hemoglobin: sensitivity 0.56, specificity 0.71, area under the curve 0.66). CONCLUSIONS The NMTT is a reliable insulin secretion test in patients with type 2 diabetes, except for those in a hyperglycemic state.
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Affiliation(s)
- Youhei Fujioka
- Division of Molecular Medicine and TherapeuticsDepartment of Multidisciplinary Internal MedicineTottori UniversityYonago, TottoriJapan
| | - Tsuyoshi Okura
- Division of Molecular Medicine and TherapeuticsDepartment of Multidisciplinary Internal MedicineTottori UniversityYonago, TottoriJapan
| | - Keisuke Sumi
- Division of Molecular Medicine and TherapeuticsDepartment of Multidisciplinary Internal MedicineTottori UniversityYonago, TottoriJapan
| | - Kazuhisa Matsumoto
- Division of Molecular Medicine and TherapeuticsDepartment of Multidisciplinary Internal MedicineTottori UniversityYonago, TottoriJapan
| | - Kyoko Shoji
- Division of Molecular Medicine and TherapeuticsDepartment of Multidisciplinary Internal MedicineTottori UniversityYonago, TottoriJapan
| | - Risa Nakamura
- Division of Molecular Medicine and TherapeuticsDepartment of Multidisciplinary Internal MedicineTottori UniversityYonago, TottoriJapan
| | - Kazuhiko Matsuzawa
- Department of Regional MedicineFaculty of MedicineTottori UniversityYonago, TottoriJapan
| | - Shoichiro Izawa
- Division of Molecular Medicine and TherapeuticsDepartment of Multidisciplinary Internal MedicineTottori UniversityYonago, TottoriJapan
| | - Masahiko Kato
- Division of Molecular Medicine and TherapeuticsDepartment of Multidisciplinary Internal MedicineTottori UniversityYonago, TottoriJapan
| | - Shinichi Taniguchi
- Department of Regional MedicineFaculty of MedicineTottori UniversityYonago, TottoriJapan
| | - Kazuhiro Yamamoto
- Division of Molecular Medicine and TherapeuticsDepartment of Multidisciplinary Internal MedicineTottori UniversityYonago, TottoriJapan
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Nakamura R, Okura T, Fujioka Y, Sumi K, Matsuzawa K, Izawa S, Ueta E, Kato M, Taniguchi SI, Yamamoto K. Serum fatty acid-binding protein 4 (FABP4) concentration is associated with insulin resistance in peripheral tissues, A clinical study. PLoS One 2017; 12:e0179737. [PMID: 28654680 PMCID: PMC5487042 DOI: 10.1371/journal.pone.0179737] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 06/02/2017] [Indexed: 01/22/2023] Open
Abstract
Type 2 diabetes mellitus (T2DM) is caused by insulin resistance and β cell dysfunction. In recent studies reported that several markers associated with insulin sensitivity in skeletal muscle, Adiponectin and other parameters, such as fatty acid-binding protein (FABP4), have been reported to regulate insulin resistance, but it remains unclear which factor mostly affects insulin resistance in T2DM. In this cross-sectional study, we evaluated the relationships between several kinds of biomarkers and insulin resistance, and insulin secretion in T2DM and healthy controls. We recruited 30 participants (12 T2DM and 18 non-diabetic healthy controls). Participants underwent a meal tolerance test during which plasma glucose, insulin and serum C-peptide immunoreactivity were measured. We performed a hyperinsulinemic-euglycemic clamp and measured the glucose-disposal rate (GDR). The fasting serum levels of adiponectin, insulin-like growth factor-1, irisin, autotaxin, FABP4 and interleukin-6 were measured by ELISA. We found a strong negative correlation between FABP4 concentration and GDR in T2DM (r = -0.657, p = 0.020). FABP4 also was positively correlated with insulin secretion during the meal tolerance test in T2DM (IRI (120): r = 0.604, p = 0.038) and was positively related to the insulinogenic index in non-DM subjects (r = 0.536, p = 0.022). Autotaxin was also related to GDR. However, there was no relationship with insulin secretion. We found that serum FABP4 concentration were associated with insulin resistance and secretion in T2DM. This suggests that FABP4 may play an important role in glucose homeostasis.
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Affiliation(s)
- Risa Nakamura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Tsuyoshi Okura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
- * E-mail:
| | - Yohei Fujioka
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Keisuke Sumi
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kazuhiko Matsuzawa
- Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Shoichiro Izawa
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Etsuko Ueta
- School of Health Science, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Masahiko Kato
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Shin-ichi Taniguchi
- Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kazuhiro Yamamoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
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21
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Okura T, Ueta E, Nakamura R, Fujioka Y, Sumi K, Matsumoto K, Shoji K, Matsuzawa K, Izawa S, Nomi Y, Mihara H, Otsuka Y, Kato M, Taniguchi SI, Yamamoto K. High Serum Advanced Glycation End Products Are Associated with Decreased Insulin Secretion in Patients with Type 2 Diabetes: A Brief Report. J Diabetes Res 2017; 2017:5139750. [PMID: 28695132 PMCID: PMC5485485 DOI: 10.1155/2017/5139750] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 03/24/2017] [Accepted: 04/12/2017] [Indexed: 01/11/2023] Open
Abstract
OBJECTIVE Advanced glycation end products (AGEs) are important in the pathophysiology of type 2 diabetes mellitus (T2DM). They directly cause insulin secretory defects in animal and cell culture models and may promote insulin resistance in nondiabetic subjects. We have developed a highly sensitive liquid chromatography-tandem mass spectrometry method for measuring AGEs in human serum. Here, we use this method to investigate the relationship between AGEs and insulin secretion and resistance in patients with T2DM. METHODS Our study involved 15 participants with T2DM not on medication and 20 nondiabetic healthy participants. We measured the AGE carboxyethyllysine (CEL), carboxymethyllysine (CML), and methyl-glyoxal-hydro-imidazolone (MG-H1). Plasma glucose and insulin were measured in these participants during a meal tolerance test, and the glucose disposal rate was measured during a euglycemic-hyperinsulinemic clamp. RESULTS CML and CEL levels were significantly higher in T2DM than non-DM participants. CML showed a significant negative correlation with insulin secretion, HOMA-%B, and a significant positive correlation with the insulin sensitivity index in T2DM participants. There was no correlation between any of the AGEs measured and glucose disposal rate. CONCLUSIONS These results suggest that AGE might play a role in the development or prediction of insulin secretory defects in type 2 diabetes.
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Affiliation(s)
- Tsuyoshi Okura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
- *Tsuyoshi Okura:
| | - Etsuko Ueta
- School of Health Science, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Risa Nakamura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Yohei Fujioka
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Keisuke Sumi
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kazuhisa Matsumoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kyoko Shoji
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kazuhiko Matsuzawa
- Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Shoichiro Izawa
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Yuri Nomi
- Faculty of Applied Life Sciences, Niigata University of Pharmacy and Applied Life Sciences, Niigata, Japan
| | - Hitomi Mihara
- Department of Food and Nutrition, Toita Women's College, Tokyo, Japan
| | - Yuzuru Otsuka
- Department of Food and Nutrition, Toita Women's College, Tokyo, Japan
| | - Masahiko Kato
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Shin-ichi Taniguchi
- Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
| | - Kazuhiro Yamamoto
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan
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22
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Matsuzawa K, Izawa S, Okura T, Fujii S, Matsumoto K, Shoji K, Nakamura R, Sumi K, Fujioka Y, Yoshida A, Shigemasa C, Kato M, Yamamoto K, Taniguchi SI. Implications of FoxP3-positive and -negative CD4(+) CD25(+) T cells in Graves' ophthalmopathy. Endocr J 2016; 63:755-64. [PMID: 27349268 DOI: 10.1507/endocrj.ej16-0108] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Graves' ophthalmopathy (GO) is a common manifestation of Graves' disease (GD); however, its pathogenesis is not well understood. Recently, the dysregulation of regulatory T cells (Tregs) has been thought to be closely associated with the pathogenesis and clinical symptoms of autoimmune disease. We therefore evaluated whether T cell subsets, including Tregs, are associated with GO pathogenesis and clinical symptoms. In this observational study we evaluated 35 GD patients with overt ophthalmopathy (GOs) and 28 patients without ophthalmopathy (non-GOs). Fifteen healthy euthyroid patients served as healthy controls (HCs). Peripheral blood mononuclear cells from GOs, non-GOs and HCs were analyzed for CD4, CD25, and FoxP3 expression using flow cytometry. We also evaluated their correlation with disease activity according to the clinical activity score (CAS) and magnetic resonance imaging (MRI) findings. Disease severity was evaluated using the NOSPECS score, and clinical progression of GO was followed for 24 weeks. The main outcome measures were the frequencies of FoxP3-positive and -negative CD4(+) CD25(+) T cells at study outset, namely Tregs and effector T cells (Teffs), respectively. GOs had higher frequencies of Teffs (30.8±8.4%) than non-GOs (19.4±7.1%) and HCs (22.7±7.9%). Notably, patients with improved GOs had lower frequencies of Tregs (5.8±1.1%) than patients with stable or deteriorated GOs (7.3±1.2%), although ophthalmic and radiological parameters were not significantly different at the start of the study. In conclusion, an expanded Teff population may be associated with GO pathogenesis. Additionally, decreased Tregs in peripheral blood may predict a good clinical outcome.
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Affiliation(s)
- Kazuhiko Matsuzawa
- Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago 683-8504, Japan
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Ishihara A, Chisaka M, Ohgi Y, Matsuzawa K, Mitsushima S, Ota K. Synthesis of nano-TaOx oxygen reduction reaction catalysts on multi-walled carbon nanotubes connected via a decomposition of oxy-tantalum phthalocyanine. Phys Chem Chem Phys 2015; 17:7643-7. [DOI: 10.1039/c5cp00317b] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nano-TaOx particles were supported on MWCNTs via a thermal decomposition of oxy-tantalum phthalocyanine. The ORR activity solely-originated from nano-TaOx was above 0.9 V versus RHE with larger currents than conventional micro-TaOx in acidic media.
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Affiliation(s)
- A. Ishihara
- Green Hydrogen Research Centre
- Yokohama National University
- Yokohama
- Japan
- Institute of Advanced Sciences
| | - M. Chisaka
- Department of Electronics and Information Technology
- Hirosaki University
- Hirosaki
- Japan
| | - Y. Ohgi
- Green Hydrogen Research Centre
- Yokohama National University
- Yokohama
- Japan
| | - K. Matsuzawa
- Green Hydrogen Research Centre
- Yokohama National University
- Yokohama
- Japan
| | - S. Mitsushima
- Green Hydrogen Research Centre
- Yokohama National University
- Yokohama
- Japan
- Institute of Advanced Sciences
| | - K. Ota
- Green Hydrogen Research Centre
- Yokohama National University
- Yokohama
- Japan
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Matsuzawa K, Izawa S, Ohkura T, Ohkura H, Ishiguro K, Yoshida A, Takiyama Y, Haneda M, Shigemasa C, Yamamoto K, Taniguchi SI. Implication of intracellular localization of transcriptional repressor PLZF in thyroid neoplasms. BMC Endocr Disord 2014; 14:52. [PMID: 24990570 PMCID: PMC4087200 DOI: 10.1186/1472-6823-14-52] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 06/30/2014] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Promyelocytic leukaemia zinc finger (PLZF) is a transcriptional repressor that was originally isolated from a patient with promyelocytic leukaemia. PLZF also affects key elements for cell cycle progression, such as cyclin A, and can affect the tumourigenicity of various cancers. Thus far, the behaviour of PLZF in thyroid carcinoma remains unclear. METHODS We analysed the expression profile of PLZF in different types of benign and malignant thyroid lesions as well as in normal thyroid tissue. Specifically, we examined PLZF expression in normal thyroid (N; n = 4), adenomatous lesion (AL; n = 5), follicular adenoma (FA; n = 2), papillary thyroid carcinoma (PTC; n = 20), and anaplastic thyroid carcinoma (ATC; n = 3) samples. PLZF expression was estimated by western blotting and immunohistochemical (IHC) staining. RESULTS PLZF was expressed in all samples of thyroid lesions examined. In N, AL, and FA, PLZF was mainly localized in the nucleus. In contrast, in PTC and ATC, PLZF was mainly expressed in the cytosol with high intensity. In more detail, the cytoplasmic IHC scores in PTC with capsular invasion (CI) and lymph node (LN) metastasis were higher than those in PTC without CI and LN metastasis. CONCLUSIONS PLZF shows different subcellular localizations among PTC, ATC, and other thyroid lesions. Furthermore, high cytoplasmic expression of PLZF may be correlated with CI and LN metastasis in thyroid carcinoma. The present report is the first to describe the implications of intracellular PLZF expression in thyroid carcinomas.
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Affiliation(s)
- Kazuhiko Matsuzawa
- Department of Regional Medicine, Tottori University Faculty of Medicine, 86 Nishi-cho, Yonago 683-8503, Japan
| | - Shoichiro Izawa
- Department of Molecular Medicine and Therapeutics, Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago 683-8504, Japan
| | - Tsuyoshi Ohkura
- Department of Molecular Medicine and Therapeutics, Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago 683-8504, Japan
| | - Hiroko Ohkura
- Department of Regional Medicine, Tottori University Faculty of Medicine, 86 Nishi-cho, Yonago 683-8503, Japan
| | - Kiyosuke Ishiguro
- Department of Surgery, Division of Organ Regeneration Surgery, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago 683-8504, Japan
| | - Akio Yoshida
- Division of Regenerative Medicine and Therapeutics, Institute of Regenerative Medicine and Biofunction, Tottori University Graduate School of Medical Science, 86 Nishi-cho, Yonago 683-8503, Japan
| | - Yumi Takiyama
- Department of Medicine, Division of Metabolism and Biosystemic Science, Asahikawa Medical University, 1-1-1 Midorigaokahigashinijyo, Asahikawa 078-8510, Japan
| | - Masakazu Haneda
- Department of Medicine, Division of Metabolism and Biosystemic Science, Asahikawa Medical University, 1-1-1 Midorigaokahigashinijyo, Asahikawa 078-8510, Japan
| | | | - Kazuhiro Yamamoto
- Department of Molecular Medicine and Therapeutics, Division of Endocrinology and Metabolism, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago 683-8504, Japan
| | - Shin-ichi Taniguchi
- Department of Regional Medicine, Tottori University Faculty of Medicine, 86 Nishi-cho, Yonago 683-8503, Japan
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Ohkura T, Fujioka Y, Sumi K, Nakanishi R, Shiochi H, Yamamoto N, Matsuzawa K, Izawa S, Ohkura H, Kato M, Taniguchi SI, Yamamoto K. Sitagliptin Improves the Impaired Acute Insulin Response during a Meal Tolerance Test in Japanese Patients with Type 2 Diabetes Mellitus: A Small-Scale Real-World Study. Diabetes Ther 2014; 5:285-97. [PMID: 24888256 PMCID: PMC4065288 DOI: 10.1007/s13300-014-0071-1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Indexed: 12/27/2022] Open
Abstract
INTRODUCTION Several studies have shown that dipeptidyl peptidase-4 (DPP-4) inhibitors improve insulin secretion during oral glucose tolerance tests. However, the effects of DPP-4 inhibitors on impaired acute insulin responses in the postprandial state in real-world settings are unknown. Therefore, we evaluated the effects of sitagliptin on the acute insulin responses in Japanese patients with type 2 diabetes mellitus (T2DM) using meal tolerance tests. METHODS Twenty-one patients with T2DM were given a test meal (460 kcal), and plasma glucose and insulin were measured at 0, 30, 60, 120, and 180 min after the meal. The insulinogenic index of all of these patients was below 43.2. The postprandial profiles were assessed at baseline and after 3 months of treatment with 50 mg/day sitagliptin after a meal (n = 11) or were untreated (control group; n = 10). This study was a prospective, open-label, non-blinded, non-randomized, clinical study. RESULTS Sitagliptin significantly decreased the plasma glucose levels at 60, 120, and 180 min, and significantly increased the plasma insulin levels at 0 and 30 min. There were no significant changes in glucose or insulin in the control group. The insulinogenic index increased significantly in the sitagliptin group compared with the control group (+16.7 vs. +0.1, P < 0.005). However, homeostasis model assessment of insulin resistance and the insulin sensitivity index were not significant different between the two groups. CONCLUSION Administration of sitagliptin at 50 mg/day after a meal improved the impaired acute insulin response and suppressed postprandial hyperglycemia. Whereas the study is rather small and the design is suboptimal as it is not randomized and not blinded, these results suggest that sitagliptin is effective in Japanese patients with T2DM, many of whom display impaired acute insulin responses after a meal.
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Affiliation(s)
- Tsuyoshi Ohkura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan,
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26
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Ohkura T, Fujioka Y, Izawa S, Sumi K, Yamamoto N, Shiochi H, Matsuzawa K, Kinoshita H, Ohkura H, Kato M, Taniguchi SI, Yamamoto K. Endogenous insulin secretion ability in meal tolerance test correlated with body mass index (BMI) in Japanese type 2 diabetes patients. Int J Diabetes Dev Ctries 2014. [DOI: 10.1007/s13410-013-0181-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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27
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Shiochi H, Ohkura T, Fujioka Y, Sumi K, Yamamoto N, Nakanishi R, Matsuzawa K, Izawa S, Ohkura H, Inoue K, Ueta E, Kato M, Taniguchi SI, Yamamoto K. Bezafibrate improves insulin resistance evaluated using the glucose clamp technique in patients with type 2 diabetes mellitus: a small-scale clinical study. Diabetol Metab Syndr 2014; 6:113. [PMID: 25360162 PMCID: PMC4213459 DOI: 10.1186/1758-5996-6-113] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [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: 07/18/2014] [Accepted: 10/09/2014] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Bezafibrate is mainly used to treat hypertriglyceridemia. Studies have reported that bezafibrate also improves type 2 diabetes mellitus, but the mechanism has not been fully elucidated. We performed euglycemic hyperinsulinemic clamps (glucose clamp) and meal tolerance tests (MTT) to examine the effects of bezafibrate on insulin resistance in patients with type 2 diabetes mellitus. METHODS Twelve Japanese patients with type 2 diabetes mellitus and dyslipidemia (mean age: 59.5 years; fasting plasma glucose: 7.95 mmol/L; hemoglobin A1c [HbA1c]: 7.3%; body mass index: 26.5 kg/m(2)) underwent a glucose clamp and MTT before and after 12 weeks of treatment with 400 mg/day bezafibrate. The glucose infusion rate was measured during the glucose clamp. The patients took a test meal (460 kcal) in the MTT. Plasma glucose and immunoreactive insulin levels were measured at 0 (fasting), 30, 60, 120, and 180 min. Serum C-peptide immunoreactivity, serum lipids, and liver function markers were also measured during the MTT. RESULTS Bezafibrate significantly increased the mean glucose infusion rate from 5.78 ± 1.94 to 6.78 ± 2.52 mg/kg/min (p < 0.05). HbA1c improved from 7.30 ± 0.55% to 7.02 ± 0.52% (p < 0.05). In the MTT, fasting plasma glucose decreased from 7.95 ± 1.15 to 6.98 ± 1.07 mmol/L (p < 0.05). The area under the plasma glucose curve from 0 to 180 min decreased significantly from 29.48 ± 5.07 to 27.12 ± 3.98 mmol/h/L (p < 0.05), whereas immunoreactive insulin was unchanged. Furthermore, bezafibrate also significantly improved serum lipids, with decreases in triglyceride levels from 1.84 ± 0.88 to 1.14 ± 0.41 mmol/L (p < 0.05), low-density lipoprotein cholesterol levels from 3.56 ± 0.83 to 2.92 ± 0.55 mmol/L (p < 0.05), and remnant-like particle cholesterol levels decreased from 0.25 ± 0.16 to 0.14 ± 0.06 mmol/L (p < 0.05), and increases in high-density lipoprotein cholesterol levels from 1.50 ± 0.24 to 1.66 ± 0.29 mmol/L (p < 0.05). CONCLUSIONS Bezafibrate improved glucose intolerance and peripheral insulin resistance in these Japanese patients with type 2 diabetes mellitus and dyslipidemia. Therefore, bezafibrate could be used to treat insulin resistance in patients with type 2 diabetes mellitus and dyslipidemia. TRIAL REGISTRATION University Hospital Medical Information Network (UMIN) Clinical Trials Registry, UMIN000012462.
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Affiliation(s)
- Hideki Shiochi
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Nishi-chou 36-1, Yonago, Tottori, 683-8504 Japan
| | - Tsuyoshi Ohkura
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Nishi-chou 36-1, Yonago, Tottori, 683-8504 Japan
| | - Yohei Fujioka
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Nishi-chou 36-1, Yonago, Tottori, 683-8504 Japan
| | - Keisuke Sumi
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Nishi-chou 36-1, Yonago, Tottori, 683-8504 Japan
| | - Naoya Yamamoto
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Nishi-chou 36-1, Yonago, Tottori, 683-8504 Japan
| | - Risa Nakanishi
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Nishi-chou 36-1, Yonago, Tottori, 683-8504 Japan
| | - Kazuhiko Matsuzawa
- />Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago, Tottori, 683-8504 Japan
| | - Schoichiro Izawa
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Nishi-chou 36-1, Yonago, Tottori, 683-8504 Japan
| | - Hiroko Ohkura
- />Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago, Tottori, 683-8504 Japan
| | - Kazuoki Inoue
- />Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago, Tottori, 683-8504 Japan
| | - Etsuko Ueta
- />School of Health Science, Tottori University Faculty of Medicine, Yonago, Tottori, 683-8504 Japan
| | - Masahiko Kato
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Nishi-chou 36-1, Yonago, Tottori, 683-8504 Japan
| | - Shin-ichi Taniguchi
- />Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago, Tottori, 683-8504 Japan
| | - Kazuhiro Yamamoto
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Nishi-chou 36-1, Yonago, Tottori, 683-8504 Japan
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Ohkura T, Fujioka Y, Nakanishi R, Shiochi H, Sumi K, Yamamoto N, Matsuzawa K, Izawa S, Ohkura H, Ueta E, Kato M, Miyoshi E, Taniguchi SI, Yamamoto K. Low serum galectin-3 concentrations are associated with insulin resistance in patients with type 2 diabetes mellitus. Diabetol Metab Syndr 2014; 6:106. [PMID: 25302080 PMCID: PMC4190474 DOI: 10.1186/1758-5996-6-106] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Accepted: 09/22/2014] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND Galectin-3 is a family of soluble beta-galactoside-binding lectins that play many important regulatory roles in inflammation. Galectin-3-deficient mice have been shown to exhibit excess adiposity, hyperglycemia, insulin resistance and systemic inflammation. We investigated the association between serum galectin-3 and insulin resistance in patients with type 2 diabetes using a glucose clamp method. METHODS This was a cross-sectional study. Twenty patients (mean fasting plasma glucose 7.6 mmol/L, HbA1c 7.2%, BMI 28.1 kg/m(2)) underwent a meal tolerance test and glucose clamp test. Participants were given a test meal and plasma glucose and insulin were measured at 0, 30, 60, 120 and 180 min. The glucose disposal rate was measured during hyperinsulinemic-euglycemic glucose clamps. Serum galectin-3 levels were measured using the enzyme-linked immunosorbent assay method. RESULTS The mean serum galectin-3 level was 5103 pg/ml. Galectin-3 levels correlated significantly with the glucose disposal rate (R = 0.71, P < 0.001), fasting insulin (R = -0.56, P < 0.01), homeostasis model assessment for insulin resistance (R = -0.52, P < 0.05), and the insulin sensitivity index (R = 0.62, P < 0.005). Galectin-3 levels also positively correlated with the serum adiponectin level (R = 0.61, P < 0.05), but not with the high-sensitive C-reactive protein and interleukin-6 and -10. CONCLUSIONS These results suggest that low levels of serum galectin-3 are associated with insulin resistance in patients with type 2 diabetes.
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Affiliation(s)
- Tsuyoshi Ohkura
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori Japan
| | - Youhei Fujioka
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori Japan
| | - Risa Nakanishi
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori Japan
| | - Hideki Shiochi
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori Japan
| | - Keisuke Sumi
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori Japan
| | - Naoya Yamamoto
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori Japan
| | - Kazuhiko Matsuzawa
- />Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago, Tottori Japan
| | - Shoichiro Izawa
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori Japan
| | - Hiroko Ohkura
- />Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago, Tottori Japan
| | - Etsuko Ueta
- />School of Health Science, Tottori University Faculty of Medicine, Yonago, Japan
| | - Masahiko Kato
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori Japan
| | - Eiji Miyoshi
- />Department of Molecular Biochemistry and Clinical Investigation, Osaka University Graduate School of Medicine, Suita, Japan
| | - Shin-ichi Taniguchi
- />Department of Regional Medicine, Tottori University Faculty of Medicine, Yonago, Tottori Japan
| | - Kazuhiro Yamamoto
- />Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori Japan
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Ohkura T, Inoue K, Fujioka Y, Nakanishi R, Shiochi H, Sumi K, Yamamoto N, Matsuzawa K, Izawa S, Ohkura H, Kato M, Yamamoto K, Taniguchi SI. The proinsulin/insulin (PI/I) ratio is reduced by postprandial targeting therapy in type 2 diabetes mellitus: a small-scale clinical study. BMC Res Notes 2013; 6:453. [PMID: 24215809 PMCID: PMC3829708 DOI: 10.1186/1756-0500-6-453] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Accepted: 11/08/2013] [Indexed: 12/14/2022] Open
Abstract
Background An elevated PI/I ratio is attributable to increased secretory demand on β-cells. However, the effect of postprandial targeting therapy on proinsulin level is unknown. We evaluated the metabolic effect of glinide and sulfonylurea (SU) using the meal tolerance test (MTT). Methods MTT was applied to previously untreated Type 2 Diabetes Mellitus (T2DM) subjects. Twenty-two participants were given a test meal (450 kcal). Plasma glucose and insulin were measured at 0 (fasting), 30, 60, 120, and 180 min. Serum proinsulin and C-peptide immunoreactivity (CPR) were measured at 0 and 120 min. Postprandial profile was assessed at baseline and following 3 months treatment with either mitiglinide or glimepiride. Results Plasma glucose level at 30, 60, 120, and 180 min was significantly improved by mitiglinide. Whereas, glimepiride showed a significant improve plasma glucose at 0, 180 min. Peak IRI shifted from 120 to 30 min by mitiglinide treatment. The pattern of insulin secretion was not changed by glimepiride treatment. Whereas mitiglinide did not affect the PI/I ratio, glimepiride tended to increase the PI/I ratio. Moreover, although mitiglinide did not affect PI/I ratio as a whole, marked reduction was noted in some patients treated by mitiglinide. PI/I ratio was reduced significantly in the responder group. The responder subgroup exhibited less insulin resistance and higher insulinogenic index at baseline than non-responders. Moreover, the triglyceride level of responders was significantly lower than that of non-responders. Conclusions Mitiglinide improved postprandial insulin secretion pattern and thereby suppressed postprandial glucose spike. In T2DM patients with low insulin resistance and low triglyceride, mitiglinide recovered impaired β-cell function from the viewpoint of the PI/I ratio. Trial registration UMIN-CTR: UMIN000010467
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Affiliation(s)
- Tsuyoshi Ohkura
- Division of Cardiovascular Medicine, Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Tottori, Japan.
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Uehara N, Ishihara A, Kohno Y, Matsuzawa K, Mitsushima S, Ota KI. Activity of Tantalum Oxide-Based Electrocatalysts toward Oxygen Reduction Reaction for PEFC. ACTA ACUST UNITED AC 2013. [DOI: 10.1149/05801.1217ecst] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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31
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Izawa S, Okamura T, Matsuzawa K, Ohkura T, Ohkura H, Ishiguro K, Noh JY, Kamijo K, Yoshida A, Shigemasa C, Kato M, Yamamoto K, Taniguchi SI. Autoantibody against WD repeat domain 1 is a novel serological biomarker for screening of thyroid neoplasia. Clin Endocrinol (Oxf) 2013; 79:35-42. [PMID: 23215816 DOI: 10.1111/cen.12121] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Revised: 10/23/2012] [Accepted: 12/03/2012] [Indexed: 11/29/2022]
Abstract
BACKGROUND Thyroid nodules are common among adults, and accurate diagnosis is critical in for management decisions. Ultrasound and fine needle aspiration cytology are the most common methods to evaluate nodules, but they are not practical for screening large numbers of patients because of cost and time considerations. OBJECTIVE The aim of this study was to isolate an autoantibody to tumour antigen, WD repeat domain 1 (WDR1), and evaluate its diagnostic sensitivity and specificity for thyroid neoplasms. PATIENTS AND METHODS We investigated serological biomarkers in patients with thyroid carcinoma who had a poor prognosis. Using a serological analysis of recombinant cDNA expression cloning (SEREX) strategy, we isolated WDR1 and its specific autoantibody in the sera of patients with undifferentiated thyroid carcinoma (UTC). We examined using indirect ELISA, the titre of the anti-WDR1 antibody (AWA) in 54 study patients: 10 with UTC, 20 with papillary thyroid carcinoma (PTC), 17 with benign thyroid nodule (BTN), 7 with autoimmune thyroid disease (AITD), as well as 38 controls (N). RESULTS WDR1 was ubiquitously expressed in various types of thyroid tissues. However, the titre of AWA in UTC and PTC was significantly higher than that in BTN, AITD and N (P < 0·001). No significant correlation was observed between thyroid function, serum thyroglobulin and tumour diameter. The cut-off value estimated using ROC to differentiate malignancies from others was 0·95 (sensitivity 96·7%, specificity 91·9%, AUC 0·969, P < 0·001). CONCLUSIONS Anti-WDR1 antibody could be a novel approach for serological screening of PTC and UTC, and could be an efficient and inexpensive biomarker.
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MESH Headings
- Animals
- Autoantibodies/blood
- Autoantibodies/immunology
- Biomarkers, Tumor/blood
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/immunology
- Blotting, Northern
- Carcinoma/diagnosis
- Carcinoma/genetics
- Carcinoma/immunology
- Carcinoma, Papillary
- Cell Line
- DNA, Complementary/chemistry
- DNA, Complementary/genetics
- Diagnosis, Differential
- Enzyme-Linked Immunosorbent Assay
- Female
- Gene Expression Regulation, Neoplastic
- Gene Library
- Humans
- Male
- Microfilament Proteins/blood
- Microfilament Proteins/genetics
- Microfilament Proteins/immunology
- ROC Curve
- Sequence Analysis, DNA
- Thyroglobulin/blood
- Thyroid Cancer, Papillary
- Thyroid Neoplasms/diagnosis
- Thyroid Neoplasms/genetics
- Thyroid Neoplasms/immunology
- Thyroid Nodule/diagnosis
- Thyroid Nodule/genetics
- Thyroid Nodule/immunology
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Affiliation(s)
- Shoichiro Izawa
- Endocrinology and Metabolism, Department of Molecular Medicine and Therapeutics, Tottori University Faculty of Medicine, Yonago, Japan
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Sumi K, Ohkura T, Yamamoto N, Fujioka Y, Matsuzawa K, Izawa S, Shiochi H, Kinoshita H, Ohkura H, Kato M, Yamamoto K, Taniguchi SI. Long-term miglitol administration suppresses postprandial glucose-dependent insulinotropic polypeptide secretion. Diabetol Int 2013. [DOI: 10.1007/s13340-013-0116-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Mitsushima S, Fujita Y, Ishihara A, Ohgi Y, Matsuzawa K, Matsumoto M, Arao M, Imai H, Kohno Y, Ota KI. Catalytic Activity and Stability of Ta Compounds for Oxygen Reduction Reaction. ACTA ACUST UNITED AC 2013. [DOI: 10.1149/05002.1823ecst] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Rutka J, Matsuzawa K, Hubbard S, Fukuyama K, Becker L, Stetlerstevenson W, Edwards D, Dirks P. Expression of timp-1, timp-2, 72-kda and 92-kda type-iv collagenase transcripts in human astrocytoma cell-lines - correlation with astrocytoma cell invasiveness. Int J Oncol 2012; 6:877-84. [PMID: 21556615 DOI: 10.3892/ijo.6.4.877] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Malignant astrocytomas are highly invasive neoplasms which infiltrate diffusely into regions of normal brain. As evidence to support one mechanism by which tumor cells are known to invade, we have previously shown that astrocytoma cell lines secrete a variety of matrix metalloproteinases (MMPs) and metalloproteinase inhibitors (Apodaca et al: Cancer Res 50: 2322-2329, 1990). In the present study we determined the expression of tissue inhibitor of metalloproteinase (TIMP)-1, TIMP-2, 72-kDa and 92-kDa type IV collagenase transcripts among human astrocytoma cell lines. In addition, we sought to correlate MMP and TIMP transcript levels with astrocytoma invasiveness. RNA from seven well characterized human astrocytoma cell lines was extracted before and after phorbol ester treatment and Northern blot analyses were performed using cDNA probes for the MMPs and TIMPs. All astrocytoma cell lines and normal human leptomeningeal cells were tested for their relative invasive potential using an in vitro invasion assay. There was variable expression of MMP and TIMP transcripts among astrocytoma cell lines. SF-188 was the only cell line to demonstrate a relative abundance of 72- and 92-kDa type IV collagenase transcripts over TIMP-1 and TIMP-2 transcript levels. Interestingly, this cell line was the most highly invasive in the in vitro invasion assay system. U 343 MG-A demonstrated relative abundance of TIMP-1 and -2 transcripts over 72- and 92-kDa type IV collagenase transcripts and was the least invasive cell line. Prior treatment of astrocytoma cell lines with phorbol ester upregulated TIMP-1 and 92-kDa type IV collagenase transcripts, but not TIMP-2 and 72-kDa type IV collagenase transcripts. We conclude that there is only partial correlation between MMP and TIMP transcript levels and in vitro cell invasiveness among the astrocytoma cell lines studied. Our analysis has led to the identification of an astrocytoma cell line, SF-188, which appears to overexpress the 72-kDa and 92-kDa type IV collagenase transcripts relative to low level TIMP-1 and TIMP-2 transcripts. This particular cell line will continue to be of considerable value in dissecting some of the molecular mechanisms involved in astrocytoma cell invasion.
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Affiliation(s)
- J Rutka
- UNIV TORONTO,HOSP SICK CHILDREN,BRAIN TUMOR RES LAB,TORONTO,ON M5G 1X8,CANADA. UNIV TORONTO,HOSP SICK CHILDREN,DIV NEUROPATHOL,TORONTO,ON M5G 1X8,CANADA. NCI,PATHOL LAB,BETHESDA,MD 20892. UNIV CALGARY,DEPT PHARMACOL & THERAPEUT,CALGARY,AB,CANADA
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Ohkura T, Taniguchi SI, Osaki Y, Yamamoto N, Sumi K, Fujioka Y, Matsuzawa K, Izawa S, Shiochi H, Kinoshita H, Inoue K, Takechi M, Kishimoto T, Shigemasa C. Lower fasting plasma glucose criteria and high triglycerides are effective for screening diabetes mellitus in the rural Japanese population: the Tottori-Kofu Study. Rural Remote Health 2011; 11:1697. [PMID: 21888466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
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Ohkura T, Taniguchi SI, Osaki Y, Yamamoto N, Sumi K, Fujioka Y, Matsuzawa K, Izawa S, Shiochi H, Kinoshita H, Inoue K, Takechi M, Kishimoto T, Shigemasa C. Lower fasting plasma glucose criteria and high triglycerides are effective for screening diabetes mellitus in the rural Japanese population: the Tottori-Kofu Study. Rural Remote Health 2011. [DOI: 10.22605/rrh1697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Suzuki S, Kajiyama H, Shibata K, Ino K, Nawa A, Sakakibara K, Matsuzawa K, Takeda A, Kinoshita Y, Kawai M, Nagasaka T, Kikkawa F. Is there any association between retroperitoneal lymphadenectomy and survival benefit in ovarian clear cell carcinoma patients? Ann Oncol 2008; 19:1284-1287. [PMID: 18356137 DOI: 10.1093/annonc/mdn059] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S Suzuki
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - H Kajiyama
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - K Shibata
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - K Ino
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - A Nawa
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - K Sakakibara
- Department of Obstetrics and Gynecology, Okazaki City Hospital, Okazaki
| | - K Matsuzawa
- Department of Obstetrics and Gynecology, Anjyo Kosei Hospital, Anjyo
| | - A Takeda
- Department of Obstetrics and Gynecology, Gifu Prefectural Tajimi Hospital, Tajimi
| | - Y Kinoshita
- Department of Obstetrics and Gynecology, Ogaki Municipal Hospital, Ogaki
| | - M Kawai
- Department of Obstetrics and Gynecology, Toyohashi Municipal Hospital, Toyohashi
| | - T Nagasaka
- Division of Pathology, Clinical Laboratory, Nagoya University Hospital, Nagoya, Japan
| | - F Kikkawa
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Chekanov S, Derrick M, Krakauer D, Loizides JH, Magill S, Miglioranzi S, Musgrave B, Repond J, Yoshida R, Mattingly MCK, Antonioli P, Bari G, Basile M, Bellagamba L, Boscherini D, Bruni A, Bruni G, Cara Romeo G, Cifarelli L, Cindolo F, Contin A, Corradi M, De Pasquale S, Giusti P, Iacobucci G, Margiotti A, Montanari A, Nania R, Palmonari F, Pesci A, Sartorelli G, Zichichi A, Aghuzumtsyan G, Bartsch D, Brock I, Goers S, Hartmann H, Hilger E, Irrgang P, Jakob HP, Kind O, Meyer U, Paul E, Rautenberg J, Renner R, Stifutkin A, Tandler J, Voss KC, Wang M, Weber A, Bailey DS, Brook NH, Cole JE, Heath GP, Namsoo T, Robins S, Wing M, Capua M, Mastroberardino A, Schioppa M, Susinno G, Kim JY, Kim YK, Lee JH, Lim IT, Pac MY, Caldwell A, Helbich M, Liu X, Mellado B, Ning Y, Paganis S, Ren Z, Schmidke WB, Sciulli F, Chwastowski J, Eskreys A, Figiel J, Galas A, Olkiewicz K, Stopa P, Zawiejski L, Adamczyk L, Bołd T, Grabowska-Bołd I, Kisielewska D, Kowal AM, Kowal M, Kowalski T, Przybycień M, Suszycki L, Szuba D, Szuba J, Kotański A, Słomiński W, Adler V, Behrens U, Bloch I, Borras K, Chiochia V, Dannheim D, Drews G, Fourletova J, Fricke U, Geiser A, Göttlicher P, Gutsche O, Haas T, Hain W, Hillert S, Kahle B, Kötz U, Kowalski H, Kramberger G, Labes H, Lelas D, Lim H, Löhr B, Mankel R, Melzer-Pellmann IA, Nguyen CN, Notz D, Nucio-Quiroz AE, Polini A, Raval A, Rurua L, Schneekloth U, Stösslein U, Wolf G, Youngman C, Zeuner W, Schlenstedt S, Barbagli G, Gallo E, Genta C, Pelfer PG, Bamberger A, Benen A, Karstens F, Dobur D, Vlasov NN, Bell M, Bussey PJ, Doyle AT, Ferrando J, Hamilton J, Hanlon S, Saxon DH, Skillicorn IO, Gialas I, Carli T, Gosau T, Holm U, Krumnack N, Lohrmann E, Milite M, Salehi H, Schleper P, Stonjek S, Wichmann K, Wick K, Ziegler A, Ziegler A, Collins-Tooth C, Foudas C, Gonçalo R, Long KR, Tapper AD, Cloth P, Filges D, Kataoka M, Nagano K, Tokushuku K, Yamada S, Yamazaki Y, Barakbaev AN, Boos EG, Pokrovskiy NS, Zhautykov BO, Son D, Piotrzkowski K, Barreiro F, Glasman C, González O, Labarga L, del Peso J, Tassi E, Terrón J, Vázquez M, Zambrana M, Barbi M, Corriveau F, Gliga S, Lainesse J, Padhi S, Stairs DG, Walsh R, Tsurugai T, Antonov A, Danilov P, Dolgoshein BA, Gladkov D, Sosnovtsev V, Suchkov S, Dementiev RK, Ermolov PF, Golubkov YA, Katkov II, Khein LA, Korzhavina IA, Kuzmin VA, Levchenko BB, Lukina OY, Proskuryakov AS, Shcheglova LM, Zotkin SA, Coppola N, Grijpink S, Koffeman E, Kooijman P, Maddox E, Pellegrino A, Schagen S, Tiecke H, Velthuis JJ, Wiggers L, de Wolf E, Brümmer N, Bylsma B, Durkin LS, Ling TY, Cooper-Sarkar AM, Cottrell A, Devenish RCE, Foster B, Grzelak G, Gwenlan C, Patel S, Straub PB, Walczak R, Bertolin A, Brugnera R, Carlin R, Dal Corso F, Dusini S, Garfagnini A, Limentani S, Longhin A, Parenti A, Posocco M, Stanco L, Turcato M, Heaphy EA, Metlica F, Oh BY, Whitmore JJ, Iga Y, D’Agostini G, Marini G, Nigro A, Cormack C, Hart JC, McCubbin NA, Heusch C, Park IH, Pavel N, Abramowicz H, Gabareen A, Kananov S, Kreisel A, Levy A, Kuze M, Fusayasu T, Kagawa S, Kohno T, Tawara T, Yamashita T, Hamatsu R, Hirose T, Inuzuka M, Kaji H, Kitamura S, Matsuzawa K, Ferrero MI, Monaco V, Sacchi R, Solano A, Arneodo M, Ruspa M, Koop T, Martin JF, Mirea A, Butterworth JM, Hall-Wilton R, Jones TW, Lightwood MS, Sutton MR, Targett-Adams C, Ciborowski J, Ciesielski R, Łużniak P, Nowak RJ, Pawlak JM, Sztuk J, Tymieniecka T, Ukleja A, Ukleja J, Żarnecki AF, Adamus M, Plucinski P, Eisenberg Y, Gladilin LK, Hochman D, Karshon U, Riveline M, Kçira D, Lammers S, Li L, Reeder DD, Rosin M, Savin AA, Smith WH, Deshpande A, Dhawan S, Bhadra S, Catterall CD, Fourletov S, Hartner G, Menary S, Soares M, Standage J. Erratum: Bottom photoproduction measured using decays into muons in dijet events inepcollisions ats=318 GeV[Phys. Rev. D70, 012008 (2004)]. Int J Clin Exp Med 2006. [DOI: 10.1103/physrevd.74.059906] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kajiyama H, Kikkawa F, Kawai M, Mizuno K, Kobayashi I, Kinoshita Y, Matsuzawa K, Kamiya N, Inoue T, Sakakibara T. Survival and prognostic factors in patients with epithelial ovarian cancer receiving paclitaxel and carboplatin as first-line chemotherapy in Japanese women: A multi-center retrospective study. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.15022] [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: 11/20/2022] Open
Abstract
15022 Background: The aim of this retrospective study was to re-evaluate, multi-analytically, survival and prognostic factors of patients with epithelial ovarian cancer (EOC) receiving the combination of paclitaxel and carboplatin (PC). Methods: Between 1/00 and 12/04, a total of 335 cases with EOC of FIGO stage I-IV are registered in a multi-institutional series. All patients received cytoreductive surgery and combination chemotherapy of paclitaxel 180 mg/m2/3 hr and carboplatiion AUC = 5 for a total of 6 cycles. We retrospectively analyzed progression-free survival (PFS) and overall survival (OS) of these patients by stratification of assumable several prognostic factors and second-line regimen. Survival probabilities were estimated by Kaplan-Meier methods, and prognostic factors for survival were evaluated by a COX proportional hazard model. Results: Median age was 54 ± 11 years (range 9–81). The 3-, 4- and 5-year OS in patients was 67.0%, 53.9% and 50.6%, respectively. In a COX analysis, FIGO stage, histological type and residual tumor (2 cm < vs. 2 cm >; P = 0.0007, HR; 2.4, 95% CI = 1.4–4.0) were found to be independent significant factors for OS. The stratification analysis revealed that stage III-IV patients with clear cell and mucinous carcinoma have poorer prognosis than those with other histological types ( Table ). In contrast, no differences in histological grade (G1 vs. G2; P = 0.82, HR; 0.9, 95% CI = 0.5–1.6, G1 vs. G3; P = 0.65, HR; 0.9, 95% CI = 0.4–1.6) and kinds of second-line regimen were noticed for PFS and OS. Conclusions: Optimal surgical debulking, clinical stage, and histology appear to be important prognostic factors of survival in patients with EOC. This retrospective study suggests that PC may still have an impact on outcome. However, further strategy will be needed for improving survival of mucinous and clear-cell type EOC, especially with advanced stage. [Table: see text] No significant financial relationships to disclose.
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Affiliation(s)
- H. Kajiyama
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Toyohashi Municipal Hospital, Toyohashi, Japan; Nagoya First Red-Cross Hospital, Nagoya, Japan; Nagoya Second Red-Cross Hospital, Nagoya, Japan; Ogaki Municipal Hospital, Ogaki, Japan; Anjyo Kosei Hospital, Anjyo, Japan; Nagoya Memorial Hospital, Nagoya, Japan; Nagoya Medical Center, Nagoya, Japan; Okazaki Municipal Hospital, Okazaki, Japan
| | - F. Kikkawa
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Toyohashi Municipal Hospital, Toyohashi, Japan; Nagoya First Red-Cross Hospital, Nagoya, Japan; Nagoya Second Red-Cross Hospital, Nagoya, Japan; Ogaki Municipal Hospital, Ogaki, Japan; Anjyo Kosei Hospital, Anjyo, Japan; Nagoya Memorial Hospital, Nagoya, Japan; Nagoya Medical Center, Nagoya, Japan; Okazaki Municipal Hospital, Okazaki, Japan
| | - M. Kawai
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Toyohashi Municipal Hospital, Toyohashi, Japan; Nagoya First Red-Cross Hospital, Nagoya, Japan; Nagoya Second Red-Cross Hospital, Nagoya, Japan; Ogaki Municipal Hospital, Ogaki, Japan; Anjyo Kosei Hospital, Anjyo, Japan; Nagoya Memorial Hospital, Nagoya, Japan; Nagoya Medical Center, Nagoya, Japan; Okazaki Municipal Hospital, Okazaki, Japan
| | - K. Mizuno
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Toyohashi Municipal Hospital, Toyohashi, Japan; Nagoya First Red-Cross Hospital, Nagoya, Japan; Nagoya Second Red-Cross Hospital, Nagoya, Japan; Ogaki Municipal Hospital, Ogaki, Japan; Anjyo Kosei Hospital, Anjyo, Japan; Nagoya Memorial Hospital, Nagoya, Japan; Nagoya Medical Center, Nagoya, Japan; Okazaki Municipal Hospital, Okazaki, Japan
| | - I. Kobayashi
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Toyohashi Municipal Hospital, Toyohashi, Japan; Nagoya First Red-Cross Hospital, Nagoya, Japan; Nagoya Second Red-Cross Hospital, Nagoya, Japan; Ogaki Municipal Hospital, Ogaki, Japan; Anjyo Kosei Hospital, Anjyo, Japan; Nagoya Memorial Hospital, Nagoya, Japan; Nagoya Medical Center, Nagoya, Japan; Okazaki Municipal Hospital, Okazaki, Japan
| | - Y. Kinoshita
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Toyohashi Municipal Hospital, Toyohashi, Japan; Nagoya First Red-Cross Hospital, Nagoya, Japan; Nagoya Second Red-Cross Hospital, Nagoya, Japan; Ogaki Municipal Hospital, Ogaki, Japan; Anjyo Kosei Hospital, Anjyo, Japan; Nagoya Memorial Hospital, Nagoya, Japan; Nagoya Medical Center, Nagoya, Japan; Okazaki Municipal Hospital, Okazaki, Japan
| | - K. Matsuzawa
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Toyohashi Municipal Hospital, Toyohashi, Japan; Nagoya First Red-Cross Hospital, Nagoya, Japan; Nagoya Second Red-Cross Hospital, Nagoya, Japan; Ogaki Municipal Hospital, Ogaki, Japan; Anjyo Kosei Hospital, Anjyo, Japan; Nagoya Memorial Hospital, Nagoya, Japan; Nagoya Medical Center, Nagoya, Japan; Okazaki Municipal Hospital, Okazaki, Japan
| | - N. Kamiya
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Toyohashi Municipal Hospital, Toyohashi, Japan; Nagoya First Red-Cross Hospital, Nagoya, Japan; Nagoya Second Red-Cross Hospital, Nagoya, Japan; Ogaki Municipal Hospital, Ogaki, Japan; Anjyo Kosei Hospital, Anjyo, Japan; Nagoya Memorial Hospital, Nagoya, Japan; Nagoya Medical Center, Nagoya, Japan; Okazaki Municipal Hospital, Okazaki, Japan
| | - T. Inoue
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Toyohashi Municipal Hospital, Toyohashi, Japan; Nagoya First Red-Cross Hospital, Nagoya, Japan; Nagoya Second Red-Cross Hospital, Nagoya, Japan; Ogaki Municipal Hospital, Ogaki, Japan; Anjyo Kosei Hospital, Anjyo, Japan; Nagoya Memorial Hospital, Nagoya, Japan; Nagoya Medical Center, Nagoya, Japan; Okazaki Municipal Hospital, Okazaki, Japan
| | - T. Sakakibara
- Nagoya University Graduate School of Medicine, Nagoya, Japan; Toyohashi Municipal Hospital, Toyohashi, Japan; Nagoya First Red-Cross Hospital, Nagoya, Japan; Nagoya Second Red-Cross Hospital, Nagoya, Japan; Ogaki Municipal Hospital, Ogaki, Japan; Anjyo Kosei Hospital, Anjyo, Japan; Nagoya Memorial Hospital, Nagoya, Japan; Nagoya Medical Center, Nagoya, Japan; Okazaki Municipal Hospital, Okazaki, Japan
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Iri M, Takehara Y, Matsuzawa K, Yasui H, Oka T. Gallbladder carcinoma with ultrasonographically intact outer hyperechoic layer: A sign of a favorable outcome. J Med Ultrason (2001) 2002; 29:105-12. [DOI: 10.1007/bf02481232] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2001] [Revised: 04/01/2002] [Indexed: 02/06/2023]
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Chekanov S, Derrick M, Krakauer D, Magill S, Musgrave B, Pellegrino A, Repond J, Yoshida R, Mattingly MCK, Antonioli P, Bari G, Basile M, Bellagamba L, Boscherini D, Bruni A, Bruni G, Romeo GC, Cifarelli L, Cindolo F, Contin A, Corradi M, De Pasquale S, Giusti P, Iacobucci G, Levi G, Margotti A, Massam T, Nania R, Palmonari F, Pesci A, Sartorelli G, Zichichi A, Aghuzumtsyan G, Brock I, Goers S, Hartmann H, Hilger E, Irrgang P, Jakob HP, Kappes A, Katz UF, Kerger R, Kind O, Paul E, Rautenberg J, Schnurbusch H, Stifutkin A, Tandler J, Voss KC, Weber A, Wieber H, Bailey DS, Brook NH, Cole JE, Foster B, Heath GP, Heath HF, Robins S, Rodrigues E, Scott J, Tapper RJ, Wing M, Capua M, Mastroberardino A, Schioppa M, Susinno G, Jeoung HY, Kim JY, Lee JH, Lim IT, Ma KJ, Pac MY, Caldwell A, Helbich M, Liu W, Liu X, Mellado B, Paganis S, Sampson S, Schmidke WB, Sciulli F, Chwastowski J, Eskreys A, Figiel J, Klimek K, Olkiewicz K, Przybycień MB, Stopa P, Zawiejski L, Bednarek B, Grabowska-Bold I, Jeleń K, Kisielewska D, Kowal AM, Kowal M, Kowalski T, Mindur B, Przybycień M, Rulikowska-Zarȩbska E, Suszycki L, Szuba D, Szuba J, Kotański A, Bauerdick LAT, Behrens U, Borras K, Chiochia V, Crittenden J, Dannheim D, Desler K, Drews G, Fox-Murphy A, Fricke U, Geiser A, Goebel F, Göttlicher P, Graciani R, Haas T, Hain W, Hartner GF, Hebbel K, Hillert S, Koch W, Kötz U, Kowalski H, Labes H, Löhr B, Mankel R, Martens J, Martínez M, Milite M, Moritz M, Notz D, Petrucci MC, Polini A, Schneekloth U, Selonke F, Stonjek S, Wolf G, Wollmer U, Whitmore JJ, Wichmann R, Youngman C, Zeuner W, Coldewey C, Viani ALD, Meyer A, Schlenstedt S, Barbagli G, Gallo E, Pelfer PG, Bamberger A, Benen A, Coppola N, Markun P, Raach H, Wölfle S, Bell M, Bussey PJ, Doyle AT, Glasman C, Lee SW, Lupi A, McCance GJ, Saxon DH, Skillicorn IO, Bodmann B, Gendner N, Holm U, Salehi H, Wick K, Yildirim A, Ziegler A, Carli T, Garfagnini A, Gialas I, Lohrmann E, Foudas C, Gonçalo R, Long KR, Metlica F, Miller DB, Tapper AD, Walker R, Cloth P, Filges D, Kuze M, Nagano K, Tokushuku K, Yamada S, Yamazaki Y, Barakbaev AN, Boos EG, Pokrovskiy NS, Zhautykov BO, Ahn SH, Lee SB, Park SK, Lim H, Son D, Barreiro F, García G, González O, Labarga L, del Peso J, Redondo I, Terrón J, Vázquez M, Barbi M, Bertolin A, Corriveau F, Ochs A, Padhi S, Stairs DG, Tsurugai T, Antonov A, Bashkirov V, Danilov P, Dolgoshein BA, Gladkov D, Sosnovtsev V, Suchkov S, Dementiev RK, Ermolov PF, Golubkov YA, Katkov II, Khein LA, Korotkova NA, Korzhavina IA, Kuzmin VA, Levchenko BB, Lukina OY, Proskuryakov AS, Shcheglova LM, Solomin AN, Vlasov NN, Zotkin SA, Bokel C, Engelen J, Grijpink S, Maddox E, Koffeman E, Kooijman P, Schagen S, Tassi E, Tiecke H, Tuning N, Velthuis JJ, Wiggers L, de Wolf E, Brümmer N, Bylsma B, Durkin LS, Gilmore J, Ginsburg CM, Kim CL, Ling TY, Boogert S, Cooper-Sarkar AM, Devenish RCE, Ferrando J, Große-Knetter J, Matsushita T, Rigby M, Ruske O, Sutton MR, Walczak R, Brugnera R, Carlin R, Corso FD, Dusini S, Limentani S, Longhin A, Parenti A, Posocco M, Stanco L, Turcato M, Adamczyk L, Iannotti L, Oh BY, Saull PRB, Toothacker WS, Iga Y, D’Agostini G, Marini G, Nigro A, Cormack C, Hart JC, McCubbin NA, Epperson D, Heusch C, Sadrozinski H, Seiden A, Williams DC, Park IH, Pavel N, Abramowicz H, Dagan S, Gabareen A, Kananov S, Kreisel A, Levy A, Abe T, Fusayasu T, Kohno T, Umemori K, Yamashita T, Hamatsu R, Hirose T, Inuzuka M, Kitamura S, Matsuzawa K, Nishimura T, Arneodo M, Cartiglia N, Cirio R, Costa M, Ferrero MI, Maselli S, Monaco V, Peroni C, Ruspa M, Sacchi R, Solano A, Staiano A, Bailey DC, Fagerstroem CP, Galea R, Koop T, Levman GM, Martin JF, Mirea A, Sabetfakhri A, Butterworth JM, Gwenlan C, Hall-Wilton R, Hayes ME, Heaphy EA, Jones TW, Lane JB, Lightwood MS, West BJ, Ciborowski J, Ciesielski R, Grzelak G, Nowak RJ, Pawlak JM, Smalska B, Tymieniecka T, Ukleja A, Ukleja J, Zakrzewski JA, Żarnecki AF, Adamus M, Plucinski P, Sztuk J, Eisenberg Y, Gladilin LK, Hochman D, Karshon U, Breitweg J, Chapin D, Cross R, Kçira D, Lammers S, Reeder DD, Savin AA, Smith WH, Deshpande A, Dhawan S, Hughes VW, Straub PB, Bhadra S, Catterall CD, Frisken WR, Khakzad M, Menary S. Properties of hadronic final states in diffractive deep inelasticepscattering at DESY HERA. Int J Clin Exp Med 2002. [DOI: 10.1103/physrevd.65.052001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Hidaka E, Ota H, Hidaka H, Hayama M, Matsuzawa K, Akamatsu T, Nakayama J, Katsuyama T. Helicobacter pylori and two ultrastructurally distinct layers of gastric mucous cell mucins in the surface mucous gel layer. Gut 2001; 49:474-80. [PMID: 11559642 PMCID: PMC1728484 DOI: 10.1136/gut.49.4.474] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND AND AIMS Helicobacter pylori locate not only on the apical surface of surface mucous cells but also in the mucous gel layer covering the gastric mucosa. The present study was undertaken to observe the mucous gel layer itself and any H pylori in this layer at the electron microscopic level, and to determine whether H pylori proliferate in this layer. METHODS We examined resected human stomachs (five cases, fixed in Carnoy's solution, paraffin embedded) under the light microscope, and gastric biopsy specimens (10 cases, fixed in glutaraldehyde with or without osmium, epoxy embedded) under the electron microscope. We performed histochemical staining for gastric mucins and immunostaining for H pylori, gastric gland mucous type mucins, and intestinal mucins. RESULTS Under the electron microscope, surface mucous cell type mucins and gland mucous cell type mucins in the mucous gel layer covering gastric mucosa without intestinal metaplasia showed reticular and band like structures, respectively. H pylori were frequently found as small aggregates within the mucous gel layer of surface mucous cell type mucins, and H pylori within these aggregates were seen dividing. H pylori were frequently found in the mucous gel layer of the surface mucous cell type mucins along the border with the layer of gland mucous cell mucins. Occasionally, H pylori were trapped by frayed thin threads of the gland mucous cell type mucins. CONCLUSIONS The two types of gastric mucins in the mucous gel layer differ in ultrastructure. H pylori preferentially colonise and form microcolonies within the mucous gel layer of surface mucous cell type mucins. Mucins from gland mucous cells may disturb the movement of H pylori within the mucous gel layer.
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Affiliation(s)
- E Hidaka
- Central Clinical Laboratories, Shinshu University Hospital, Matsumoto, Nagano, 390-8621, Japan
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Arakura N, Hayama M, Honda T, Matsuzawa K, Akamatsu T, Ota H. Histone H3 mRNA in situ hybridization for identifying proliferating cells in human pancreas, with special reference to the ductal system. Histochem J 2001; 33:183-91. [PMID: 11508342 DOI: 10.1023/a:1017956412617] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In general, the incidence of proliferating cells parallels that of carcinogenesis. We have investigated proliferating activity and phenotype expression in epithelial cells in normal tissue, mucinous metaplasia and ductal adenocarcinoma of the pancreas. Twenty-eight resected pancreases (15 cases of pancreatic ductal adenocarcinoma and 13 cases of other diseases) were examined. Formalin-fixed, paraffin-embedded tissue sections were examined for proliferating cell activity using histone H3 mRNA in situ hybridization and immunostaining for Ki-67. In the normal pancreas, the labelling indices for proliferating cells were low and no generating zone was found. The following progressive increase was found in the labelling indices: normal ductal epithelium < mucinous metaplasia without papillary hyperplasia < mucinous metaplasia with papillary hyperplasia < ductal carcinoma. In the pancreatic ductal adenocarcinomas, the S-phase fraction, as defined by the ratio H3-mRNA-labelling index/Ki-67-labelling index, increased as the degree of differentiation decreased. Mucinous metaplasia with papillary hyperplasia showed organoid differentiation toward pyloric mucosa. If used in combination with other proliferative markers on paraffin-embedded tissue sections, histone H3 mRNA in situ hybridization could open broader perspectives on the biology of cell proliferation in the pancreatic ductal system.
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Affiliation(s)
- N Arakura
- Second Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Nagano, Japan
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Kikkawa F, Matsuzawa K, Arii Y, Kawai M, Kobayashi I, Nakashima N, Mizutani S. Randomized trial of cisplatin and carboplatin versus cisplatin, vinblastine and bleomycin in ovarian cancer. Gynecol Obstet Invest 2001; 50:269-74. [PMID: 11093052 DOI: 10.1159/000010330] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Between January 1992 and July 1997, 202 cases of epithelial ovarian cancer were registered and assigned randomly to a combination of cisplatin and carboplatin (PP group), or cisplatin, vinblastine and bleomycin (PVB group). We analyzed 189 patients whose clinical records were available. The PP chemotherapeutic regimen was advantageous in terms of overall survival compared to the PVB regimen until 4 years after the initial operation. However, the 5-year survival rates were almost the same in both groups. However, in stage III patients, the mean survival time in the PP group was 51.4 months and that in the PVB group was 23.3 months, and there was a statistically significant difference in the survival curves between the two groups (p = 0.0158). The 5-year survival rates were 31.1 and 20.4% in the PP and PVB groups, respectively, in stage III patients. The PP regimen was also significantly superior in patients with macroscopic residual tumor after the initial operation, and the 5-year survival rates were 25.7 and 10.1% in the PP and PVB groups, respectively (p = 0.0128). However, there was no significant difference between the two regimens in patients without macroscopic residual tumor. Cox's proportional hazards regression analysis showed that tumor stage, presence of macroscopic residual tumor, and the chemotherapeutic regimen used were significant prognostic factors. In conclusion, the PP chemotherapeutic regimen is superior to the PVB regimen especially in the treatment of advanced ovarian cancer.
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Affiliation(s)
- F Kikkawa
- Department of Obstetrics and Gynecology, Nagoya University School of Medicine, Nagoya, Japan
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Abstract
In the process of assessing the main cause of death in F344/N rats from the aging farm of our institute, we have often found left auricular thrombus in autopsy cases of moribund animals. In 319 autopsy cases, 45 were of left auricular thrombus and 44 were accompanied by hematopoietic neoplasms, including overt leukemia and a pre-leukemic condition of leukemia. In cases without splenomegaly, this lesion was found in 13 of 21 animals (61.9%) whereas, in cases with splenomegaly, 31 of 239 were positive for this lesion (13.0%). Thus, left auricular thrombus may be an important macroscopic diagnostic criteria of hematopoietic neoplasms, especially when splenomegaly is absent. Furthermore, this lesion tended to arise in aged animals despite the presence of splenomegaly. These results would therefore greatly contribute to aging science by confirming the health condition of experimental rats and the accuracy of subsequent results.
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Affiliation(s)
- O Miyaishi
- Department of Basic Gerontology, National Institute for Longevity Sciences (NILS), 36-3 Gengo, Obu 474-8522, Morioka, Japan
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Abstract
The incidence of all cancer increases with age through most of the human life span, but its real incidence at very old ages has not been well elucidated to date. Clarification of the real incidence of cancer in old age, especially among centenarians, may well provide pivotal information to understand the characteristics of humankind. In this study, autopsy records of the Annual of the Pathological Autopsy Cases in Japan, 1991-1996, vols. 34-39 (Japanese Society of Pathology, Tokyo) were used. Cases over 90 years old were studied individually for accurate analysis. The incidence of cancer peaked in the 6th decade and that of multiple cases in the 8th decade. In groups over 90 years of age, the incidence at 5-year intervals did not show any significant decrement. Moreover, the metastatic rate and rate of death due to cancer among centenarians was about three-fourths and two-thirds, respectively, of that of cases aged 90-94 years. The decrease in the metastatic ratio and less mortality due to cancer occurring at the oldest ages are considered due to the nature of cancer itself. The fact that the incidence of cancer does not increase would suggest that certain people among those of advanced age have a special resistance to it.
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Affiliation(s)
- O Miyaishi
- Department of Basic Gerontology, National Institute for Longevity Sciences, 36-3 Gengo, Obu 474-8522, Morioka, Japan.
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Oi S, Shibata M, Tominaga J, Honda Y, Shinoda M, Takei F, Tsugane R, Matsuzawa K, Sato O. Efficacy of neuroendoscopic procedures in minimally invasive preferential management of pineal region tumors: a prospective study. J Neurosurg 2000; 93:245-53. [PMID: 10930010 DOI: 10.3171/jns.2000.93.2.0245] [Citation(s) in RCA: 131] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECT This prospective study is based on a consecutive series of 20 patients with pineal region tumors who underwent minimally invasive preferential management. The purpose of this report is to discuss the role of neuroendoscopic procedures in the management of pineal region tumors. METHODS If the tumor markers alpha-fetoprotein and human chorionic gonadotropin were not detected in serum and there was significant ventricular dilation visualized on neuroimages, neuroendoscopic surgery was first applied for tumor debulking with tissue diagnosis and gross morphological analysis of the tumor and the intraventricular structures, followed by third ventriculostomy. Subsequent procedures were determined on the basis of verified individual tumors. For treatment of germinomas and pineoblastomas, if no tumor dissemination was confirmed by pre-, intra-, or postoperative findings, stereotactic radiotherapy or radiosurgery was performed after one course of chemotherapy with the ICE regimen (isofomid, cisplatin, and etoposide) and followed by two additional courses of chemotherapy. For treatment of malignant germ cell tumors, after extensive surgery, adjuvant chemotherapy with the ICE regimen was performed in three courses in all cases. Then radiotherapy was started using various methods, depending on the evidence of tumor dissemination. For treatment of teratomatous and neuroectodermal tumors other than pineoblastomas, extensive surgical removal was performed. As for adjuvant therapy, if the tumor was a low-grade glioma or if the patient was younger than 5 years of age, postoperative treatment did not include radiotherapy. If the tumor was a malignant teratoma or high-grade glioma, conventional focal radiotherapy was performed, followed by chemotherapy with ICE for 1 year. All but two treated patients had ventriculomegaly. Neuroendoscopic procedures were performed in six of 15 treated patients. Neuroendoscopic biopsy with tumor debulking offered enough material for tissue diagnosis, including immunohistochemical analysis and, in one case, revealed evidence of tumor dissemination undetectable on neuroimaging. With one exception, no shunt was required in any patient undergoing endoscopic third ventriculostomy. Stereotactic radiotherapy was performed in indicated cases. Favorable therapeutic outcomes were obtained in all cases of germinoma and pineoblastoma, with follow-up periods ranging from 24 months to 6.5 years. CONCLUSIONS Our minimally invasive preferential regimen clarified the precise indication for neuroendoscopic procedures, and the majority of our patients with dilated ventricles and no evidence of tumor markers were treated satisfactorily with effective neuroendoscopic procedures as the initial procedure, avoiding unnecessary craniotomy and radiotherapy and promising excellent therapeutic outcomes. The treatment for malignant pineal region tumors remains a subject for further study.
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Affiliation(s)
- S Oi
- Department of Neurosurgery, Tokai University, School of Medicine, Isehara, Kanagawa, Japan
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Miyaishi O, Tanaka S, Kanawa R, Matsuzawa K, Isobe K. Anisocytosis precedes onset of the large granular lymphocyte leukemia in aged F344/N rats. Arch Gerontol Geriatr 2000; 30:161-72. [PMID: 15374042 DOI: 10.1016/s0167-4943(00)00043-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/1999] [Revised: 01/11/2000] [Accepted: 02/06/2000] [Indexed: 11/30/2022]
Abstract
In investigations using experimental animals, the unexpected affection of certain diseases often cause great impairment to them especially when using aged animals. In F344 rats, large granular lymphocyte leukemia is the most frequent fatal disease which increases along their aging. The timely detection of rats at risk for leukemia is very important in order to exclude such animals and thus obtain precise results in many fields of investigation. In the process of assessing the main cause of death in F344/N rats of the aging farm of our institute, NILS, we found cases with no obvious contributory disease to death that showed anisocytosis in a peripheral blood smear. In such cases, histological examination of spleen revealed consistent features of leukemia and findings of the liver and kidney were considered due to this hematologic disorder. Anisocytosis was frequently seen in the advances stage of leukemia. Thus we concluded that anisocytosis is a prior condition of leukemia and its detection in a peripheral blood smear is predictive of the disease when using aged animals.
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Affiliation(s)
- O Miyaishi
- Department of Basic Gerontology, National Institute for Longevity Sciences, 36-3 Gengo, Morioka, Obu 474-8522, Japan.
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Abstract
Important parameters to identify and develop appropriate animal models for longevity science include survivability, age-related disorders, and easy handling of aged individuals. It is found that F334/Du and F344/N have distinctive strain difference in these parameters. The finding suggests F334/Du and F344/N, even though they are historically siblings, need clearly separate identification when used as animal models for aging science, in particular, longevity science.
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Affiliation(s)
- S Tanaka
- Laboratory Animal Research Facilities (LARF), National Institute for Longevity Sciences (NILS), Obu, Japan
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Kosako H, Goto H, Yanagida M, Matsuzawa K, Fujita M, Tomono Y, Okigaki T, Odai H, Kaibuchi K, Inagaki M. Specific accumulation of Rho-associated kinase at the cleavage furrow during cytokinesis: cleavage furrow-specific phosphorylation of intermediate filaments. Oncogene 1999; 18:2783-8. [PMID: 10348354 DOI: 10.1038/sj.onc.1202633] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The small GTPase Rho and one of its targets, Rho-associated kinase (Rho-kinase), are implicated in a wide spectrum of cellular functions, including cytoskeletal rearrangements, transcriptional activation and smooth muscle contraction. Since Rho also plays an essential role in cytokinesis, Rho-kinase may possibly mediate some biological aspects of cytokinesis. Here, using a series of monoclonal antibodies that can specifically recognize distinct phosphorylated sites on glial fibrillary acidic protein (GFAP) and vimentin, phosphorylation sites by Rho-kinase in vitro were revealed to be identical to in vivo phosphorylation sites on these intermediate filament (IF) proteins at the cleavage furrow in dividing cells. We then found, by preparing two types of anti-Rho-kinase antibodies, that Rho-kinase accumulated highly and circumferentially at the cleavage furrow in various cell lines. This subcellular distribution during cytokinesis was very similar to that of ezrin/radixin/moesin (ERM) proteins and Ser19-phosphorylated myosin light chain. These results raise the possibility that Rho-kinase might be involved in the formation of the contractile ring by modulating these F-actin-binding proteins during cytokinesis and in the phosphorylation and regulation of IF proteins at the cleavage furrow.
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Affiliation(s)
- H Kosako
- Laboratory of Biochemistry, Aichi Cancer Center Research Institute, Nagoya, Japan
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