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Sekiya M, Ma Y, Kainoh K, Saito K, Yamazaki D, Tsuyuzaki T, Chen W, Adi Putri PIP, Ohno H, Miyamoto T, Takeuchi Y, Murayama Y, Sugano Y, Osaki Y, Iwasaki H, Yahagi N, Suzuki H, Motomura K, Matsuzaka T, Murata K, Mizuno S, Takahashi S, Shimano H. Loss of CtBP2 may be a mechanistic link between metabolic derangements and progressive impairment of pancreatic β cell function. Cell Rep 2023; 42:112914. [PMID: 37557182 DOI: 10.1016/j.celrep.2023.112914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/19/2023] [Accepted: 07/16/2023] [Indexed: 08/11/2023] Open
Abstract
The adaptive increase in insulin secretion in early stages of obesity serves as a safeguard mechanism to maintain glucose homeostasis that cannot be sustained, and the eventual decompensation of β cells is a key event in the pathogenesis of diabetes. Here we describe a crucial system orchestrated by a transcriptional cofactor CtBP2. In cultured β cells, insulin gene expression is coactivated by CtBP2. Global genomic mapping of CtBP2 binding sites identifies a key interaction between CtBP2 and NEUROD1 through which CtBP2 decompacts chromatin in the insulin gene promoter. CtBP2 expression is diminished in pancreatic islets in multiple mouse models of obesity, as well as human obesity. Pancreatic β cell-specific CtBP2-deficient mice manifest glucose intolerance with impaired insulin secretion. Our transcriptome analysis highlights an essential role of CtBP2 in the maintenance of β cell integrity. This system provides clues to the molecular basis in obesity and may be targetable to develop therapeutic approaches.
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Affiliation(s)
- Motohiro Sekiya
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan.
| | - Yang Ma
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Kenta Kainoh
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Kenji Saito
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Daichi Yamazaki
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Tomomi Tsuyuzaki
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Wanpei Chen
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Putu Indah Paramita Adi Putri
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Hiroshi Ohno
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Takafumi Miyamoto
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Yoshinori Takeuchi
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Yuki Murayama
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Yoko Sugano
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Yoshinori Osaki
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Hitoshi Iwasaki
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Naoya Yahagi
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Hiroaki Suzuki
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Kaori Motomura
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
| | - Takashi Matsuzaka
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan; Transborder Medical Research Center, University of Tsukuba, Tsukuba 305-8575, Ibaraki, Japan
| | - Kazuya Murata
- Laboratory Animal Resource Center in Transborder Medical Research Center, University of Tsukuba, Tsukuba 305-8575, Ibaraki, Japan
| | - Seiya Mizuno
- Laboratory Animal Resource Center in Transborder Medical Research Center, University of Tsukuba, Tsukuba 305-8575, Ibaraki, Japan
| | - Satoru Takahashi
- Laboratory Animal Resource Center in Transborder Medical Research Center, University of Tsukuba, Tsukuba 305-8575, Ibaraki, Japan
| | - Hitoshi Shimano
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Ibaraki, Japan
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Saito K, Sekiya M, Kainoh K, Yoshino R, Hayashi A, Han SI, Araki M, Ohno H, Takeuchi Y, Tsuyuzaki T, Yamazaki D, Wanpei C, Hada L, Watanabe S, Paramita Adi Putri PI, Murayama Y, Sugano Y, Osaki Y, Iwasaki H, Yahagi N, Suzuki H, Miyamoto T, Matsuzaka T, Shimano H. Obesity-induced metabolic imbalance allosterically modulates CtBP2 to inhibit PPAR-alpha transcriptional activity. J Biol Chem 2023:104890. [PMID: 37286039 PMCID: PMC10339064 DOI: 10.1016/j.jbc.2023.104890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/09/2023] Open
Abstract
Maintenance of metabolic homeostasis is secured by metabolite-sensing systems, which can be overwhelmed by constant macronutrient surplus in obesity. Not only the uptake processes but also the consumption of energy substrates determine the cellular metabolic burden. We herein describe a novel transcriptional system in this context comprised of peroxisome proliferator-activated receptor alpha (PPARα), a master regulator for fatty acid oxidation, and C-terminal binding protein 2 (CtBP2), a metabolite-sensing transcriptional co-repressor. CtBP2 interacts with PPARα to repress its activity, and the interaction is enhanced upon binding to malonyl-CoA, a metabolic intermediate increased in tissues in obesity and reported to suppress fatty acid oxidation through inhibition of carnitine palmitoyltransferase 1 (CPT1). In line with our preceding observations that CtBP2 adopts a monomeric configuration upon binding to acyl-CoAs, we determined that mutations in CtBP2 that shift the conformational equilibrium toward monomers increase the interaction between CtBP2 and PPARα. In contrast, metabolic manipulations that reduce malonyl-CoA decreased the formation of the CtBP2/PPARα complex. Consistent with these in vitro findings, we found that the CtBP2/PPARα interaction is accelerated in obese livers while genetic deletion of CtBP2 in the liver causes derepression of PPARα target genes. These findings support our model where CtBP2 exists primarily as a monomer in the metabolic milieu of obesity to repress PPARα, representing a liability in metabolic diseases that can be exploited to develop therapeutic approaches.
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Affiliation(s)
- Kenji Saito
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Motohiro Sekiya
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575.
| | - Kenta Kainoh
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Ryunosuke Yoshino
- Transborder Medical Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Akio Hayashi
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Song-Iee Han
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Masaya Araki
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Hiroshi Ohno
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Yoshinori Takeuchi
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Tomomi Tsuyuzaki
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Daichi Yamazaki
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Chen Wanpei
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Lisa Hada
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Sho Watanabe
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Putu Indah Paramita Adi Putri
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Yuki Murayama
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Yoko Sugano
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Yoshinori Osaki
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Hitoshi Iwasaki
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Naoya Yahagi
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Hiroaki Suzuki
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Takafumi Miyamoto
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Takashi Matsuzaka
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575; Transborder Medical Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
| | - Hitoshi Shimano
- Department of Endocrinology and Metabolism, Institute of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, 305-8575
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Nakajima R, Sekiya M, Furuta Y, Miyamoto T, Sato M, Fukuda K, Hattori K, Suehara Y, Sakata-Yanagimoto M, Chiba S, Okajima Y, Matsuzaka T, Takase S, Takanashi M, Okazaki H, Takashima Y, Yuhara M, Mitani Y, Matsumoto N, Murayama Y, Ohyama Osawa M, Ohuchi N, Yamazaki D, Mori S, Sugano Y, Osaki Y, Iwasaki H, Suzuki H, Shimano H. A case of NASH with genetic predisposition successfully treated with an SGLT2 inhibitor: a possible involvement of mitochondrial dysfunction. Endocrinol Diabetes Metab Case Rep 2022; 2022:22-0368. [PMID: 36571472 PMCID: PMC9874953 DOI: 10.1530/edm-22-0368] [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: 09/19/2022] [Accepted: 12/06/2022] [Indexed: 12/27/2022] Open
Abstract
Summary In this study, we herein describe a 47-year-old Japanese woman who manifested inheritable non-alcoholic steatohepatitis (NASH) and severe dyslipidemia. Interestingly, her NASH progression was ameliorated by treatment with a sodium-glucose co-transporter 2 (SGLT2) inhibitor. This inheritability prompted us to comprehensively decode her genomic information using whole-exome sequencing. We found the well-established I148M mutation in PNPLA3 as well as mutations in LGALS3 and PEMT for her NASH. Mutations in GCKR may contribute to both NASH and dyslipidemia. We further mined gene mutations potentially responsible for her manifestations that led to the identification of a novel M188fs mutation in MUL1 that may be causally associated with her mitochondrial dysfunction. Our case may provide some clues to better understand this spectrum of disease as well as the rationale for selecting medications. Learning points While the PNPLA3 I148M mutation is well-established, accumulation of other mutations may accelerate susceptibility to non-alcoholic steatohepatitis (NASH). NASH and dyslipidemia may be intertwined biochemically and genetically through several key genes. SGLT2 inhibitors emerge as promising treatment for NASH albeit with interindividual variation in efficacy. Genetic background may explain the mechanisms behind the variation. A novel dysfunctional mutation in MUL1 may lead to metabolic inflexibilities through impaired mitochondrial dynamics and function.
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Affiliation(s)
- Rikako Nakajima
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Motohiro Sekiya
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Yasuhisa Furuta
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Takafumi Miyamoto
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Masashi Sato
- Department of Gastroenterology, Faculty of Medicine, University of Tsukuba
| | - Kuniaki Fukuda
- Department of Gastroenterology, Faculty of Medicine, University of Tsukuba
- Department of Gastroenterology, Kasumigaura Medical Center, 2-7-14 Shimotakatsu, Tsuchiura, Ibaraki, Japan
| | - Keiichiro Hattori
- Department of Hematology, Faculty of Medicine, University of Tsukuba
| | - Yasuhito Suehara
- Department of Hematology, Faculty of Medicine, University of Tsukuba
| | | | - Shigeru Chiba
- Department of Hematology, Faculty of Medicine, University of Tsukuba
| | - Yuka Okajima
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Takashi Matsuzaka
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
- Transborder Medical Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Satoru Takase
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, the University of Tokyo, Bunkyo, Tokyo, Japan
| | - Mikio Takanashi
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, the University of Tokyo, Bunkyo, Tokyo, Japan
| | - Hiroaki Okazaki
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, the University of Tokyo, Bunkyo, Tokyo, Japan
| | - Yusuke Takashima
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Mikiko Yuhara
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Yuta Mitani
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Nako Matsumoto
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Yuki Murayama
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Mariko Ohyama Osawa
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Nami Ohuchi
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Daichi Yamazaki
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Sayuri Mori
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Yoko Sugano
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Yoshinori Osaki
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Hitoshi Iwasaki
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Hiroaki Suzuki
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
| | - Hitoshi Shimano
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan
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Furuta Y, Yatoh S, Iwasaki H, Sugano Y, Sekiya M, Suzuki H, Shimano H. L-Asparaginase-Induced Continuous Hyperglycemia With Type 1 Diabetes-Related Antibodies and HLA Genotypes: A Case Study. Cureus 2022; 14:e30067. [PMID: 36381756 PMCID: PMC9639571 DOI: 10.7759/cureus.30067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/08/2022] [Indexed: 11/06/2022] Open
Abstract
A 19-year-old male presented with fatigue and dyspnea on exertion. He was diagnosed with acute T-cell lymphoblastic leukemia. After following the Group for Research on Adult Acute Lymphoblastic Leukemia (GRAALL) 2003 protocol that incorporates L-asparaginase (L-Asp) treatment, blood glucose levels became elevated for more than one year and insulin secretion was depleted. Anti-glutamic acid decarboxylase (GAD) and anti-islet antigen 2 (IA-2) antibody levels were both positive, which is rare. The patient’s HLA genotype was sensitive for type 1 diabetes. L-Asp can cause transient hyperglycemia as a side effect. However, cases with the anti-GAD antibody have not been reported in L-Asp-induced diabetes. In summary, L-Asp-induced continuous hyperglycemia might be associated with a type 1 diabetes-related HLA genotype through elevations of anti-GAD and anti-IA-2 antibodies.
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Sekiya M, Yuhara M, Murayama Y, Ohyama Osawa M, Nakajima R, Ohuchi N, Matsumoto N, Yamazaki D, Mori S, Matsuda T, Sugano Y, Osaki Y, Iwasaki H, Suzuki H, Shimano H. A case of early-onset diabetes with impaired insulin secretion carrying a PAX6 gene Gln135* mutation. Endocrinol Diabetes Metab Case Rep 2022; 2022:22-0271. [PMID: 35979842 PMCID: PMC9422263 DOI: 10.1530/edm-22-0271] [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: 06/24/2022] [Accepted: 07/07/2022] [Indexed: 11/08/2022] Open
Abstract
Summary A paired homeodomain transcription factor, PAX6 (paired-box 6), is essential for the development and differentiation of pancreatic endocrine cells as well as ocular cells. Despite the impairment of insulin secretion observed in PAX6-deficient mice, evidence implicating causal association between PAX6 gene mutations and monogenic forms of human diabetes is limited. We herein describe a 33-year-old Japanese woman with congenital aniridia who was referred to our hospital because of her uncontrolled diabetes with elevated hemoglobin A1c (13.1%) and blood glucose (32.5 mmol/L) levels. Our biochemical analysis revealed that her insulin secretory capacity was modestly impaired as represented by decreased 24-h urinary C-peptide levels (38.0 μg/day), primarily explaining her diabetes. Intriguingly, there was a trend toward a reduction in her serum glucagon levels as well. Based on the well-recognized association of PAX6 gene mutations with congenital aniridia, we screened the whole PAX6 coding sequence, leading to an identification of a heterozygous Gln135* mutation. We tested our idea that this mutation may at least in part explain the impaired insulin secretion observed in this patient. In cultured pancreatic β-cells, exogenous expression of the PAX6 Gln135* mutant produced a truncated protein that lacked the transcriptional activity to induce insulin gene expression. Our observation together with preceding reports support the recent attempt to include PAX6 in the growing list of genes causally responsible for monogenic diabetes. In addition, since most cases of congenital aniridia carry PAX6 mutations, we may need to pay more attention to blood glucose levels in these patients. Learning points PAX6 Gln135* mutation may be causally associated not only with congenital aniridia but also with diabetes. Blood glucose levels may deserve more attention in cases of congenital aniridia with PAX6 mutations. Our case supports the recent attempt to include PAX6 in the list of MODY genes, and Gln135* may be pathogenic.
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Affiliation(s)
- Motohiro Sekiya
- 1Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Mikiko Yuhara
- 1Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yuki Murayama
- 1Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Mariko Ohyama Osawa
- 1Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Rikako Nakajima
- 1Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Nami Ohuchi
- 1Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Nako Matsumoto
- 1Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Daichi Yamazaki
- 1Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Sayuri Mori
- 1Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Takaaki Matsuda
- 1Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yoko Sugano
- 1Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yoshinori Osaki
- 1Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Hitoshi Iwasaki
- 1Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Hiroaki Suzuki
- 1Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Hitoshi Shimano
- 1Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
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6
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Suzuki Y, Suzuki H, Ishikawa T, Yamada Y, Yatoh S, Sugano Y, Iwasaki H, Sekiya M, Yahagi N, Hada Y, Shimano H. Exploratory analysis using machine learning of predictive factors for falls in type 2 diabetes. Sci Rep 2022; 12:11965. [PMID: 35831378 PMCID: PMC9279484 DOI: 10.1038/s41598-022-15224-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Accepted: 06/21/2022] [Indexed: 11/09/2022] Open
Abstract
We aimed to investigate the status of falls and to identify important risk factors for falls in persons with type 2 diabetes (T2D) including the non-elderly. Participants were 316 persons with T2D who were assessed for medical history, laboratory data and physical capabilities during hospitalization and given a questionnaire on falls one year after discharge. Two different statistical models, logistic regression and random forest classifier, were used to identify the important predictors of falls. The response rate to the survey was 72%; of the 226 respondents, there were 129 males and 97 females (median age 62 years). The fall rate during the first year after discharge was 19%. Logistic regression revealed that knee extension strength, fasting C-peptide (F-CPR) level and dorsiflexion strength were independent predictors of falls. The random forest classifier placed grip strength, F-CPR, knee extension strength, dorsiflexion strength and proliferative diabetic retinopathy among the 5 most important variables for falls. Lower extremity muscle weakness, elevated F-CPR levels and reduced grip strength were shown to be important risk factors for falls in T2D. Analysis by random forest can identify new risk factors for falls in addition to logistic regression.
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Affiliation(s)
- Yasuhiro Suzuki
- Department of Rehabilitation Medicine, University of Tsukuba Hospital, Tsukuba, Ibaraki, 305-8576, Japan.
| | - Hiroaki Suzuki
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan.
| | | | | | - Shigeru Yatoh
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yoko Sugano
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan
| | - Hitoshi Iwasaki
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan
| | - Motohiro Sekiya
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan
| | - Naoya Yahagi
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yasushi Hada
- Department of Rehabilitation Medicine, University of Tsukuba Hospital, Tsukuba, Ibaraki, 305-8576, Japan
| | - Hitoshi Shimano
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan.,International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan.,Life Science Center of Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Tsukuba, Ibaraki, 305-8577, Japan.,Japan Agency for Medical Research and Development-Core Research for Evolutional Science and Technology (AMED-CREST), Chiyoda-ku, Tokyo, 100-0004, Japan
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7
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Kainoh K, Takano R, Sekiya M, Saito K, Sugasawa T, Ma Y, Murayama Y, Sugano Y, Osaki Y, Iwasaki H, Takeuchi Y, Yahagi N, Suzuki H, Miyamoto T, Nakagawa Y, Matsuzaka T, Shimano H. CtBP2 confers protection against oxidative stress through interactions with NRF1 and NRF2. Biochem Biophys Res Commun 2021; 562:146-153. [PMID: 34052660 DOI: 10.1016/j.bbrc.2021.05.069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Accepted: 05/20/2021] [Indexed: 12/22/2022]
Abstract
While molecular oxygen is essential for aerobic organisms, its utilization is inseparably connected with generation of oxidative insults. To cope with the detrimental aspects, cells evolved antioxidative defense systems, and insufficient management of the oxidative insults underlies the pathogenesis of a wide range of diseases. A battery of genes for this antioxidative defense are regulated by the transcription factors nuclear factor-erythroid 2-like 1 and 2 (NRF1 and NRF2). While the regulatory steps for the activation of NRFs have been investigated with particular emphasis on nuclear translocation and proteosomal degradation, unknown redundancy may exist considering the indispensable nature of these defense systems. Here we unraveled that C-terminal binding protein 2 (CtBP2), a transcriptional cofactor with redox-sensing capability, is an obligate partner of NRFs. CtBP2 forms transcriptional complexes with NRF1 and NRF2 that is required to promote the expression of antioxidant genes in response to oxidative insults. Our findings illustrate a basis for understanding the transcriptional regulation of antioxidative defense systems that may be exploited therapeutically.
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Affiliation(s)
- Kenta Kainoh
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Ryo Takano
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Motohiro Sekiya
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
| | - Kenji Saito
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Takehito Sugasawa
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yang Ma
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yuki Murayama
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yoko Sugano
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yoshinori Osaki
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Hitoshi Iwasaki
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yoshinori Takeuchi
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Naoya Yahagi
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Hiroaki Suzuki
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Takafumi Miyamoto
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yoshimi Nakagawa
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan; Department of Complex Biosystem Research, Division of Research and Development, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, Toyama, 930-0194, Japan
| | - Takashi Matsuzaka
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan; Transborder Medical Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Hitoshi Shimano
- Department of Endocrinology and Metabolism, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
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8
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Midorikawa M, Suzuki H, Suzuki Y, Yamauchi K, Sato H, Nemoto K, Sugano Y, Iwasaki H, Sekiya M, Yatoh S, Yahagi N, Hada Y, Arai T, Shimano H. Relationships between Cognitive Function and Odor Identification, Balance Capability, and Muscle Strength in Middle-Aged Persons with and without Type 2 Diabetes. J Diabetes Res 2021; 2021:9961612. [PMID: 34660814 PMCID: PMC8516531 DOI: 10.1155/2021/9961612] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Accepted: 09/07/2021] [Indexed: 11/24/2022] Open
Abstract
AIM We investigated the relationship between cognitive function and olfactory and physical functions in middle-aged persons with and without type 2 diabetes (T2D) to examine the potential of olfactory and physical functions as biomarkers for early cognitive impairment. METHODS Enrolled were 70 T2D patients (age 40 to <65 y) and 81 age-matched control participants without diabetes. Cognitive function was assessed by the Montreal Cognitive Assessment (MoCA), Trail Making Test parts A and B (TMT-A/-B), Wisconsin Card Sorting Test (WCST), Quick Inventory of Depressive Symptomatology Self-Report (QIDS), and Starkstein Apathy Scale (SAS). Multiple linear regression analyses were performed. RESULTS Odor identification was an independent determinant shown in the results of the TMT-A in the entire participant group and was independently associated with the MoCA and TMT-B in the T2D group. Balance capability assessed with a stabilometer was independently associated with all cognitive function tests except for QISD and SAS in the entire participant group and the T2D group and was independently associated with TMT-A in the control group. Knee extension strength was independently associated with the SAS in the entire participant group and the T2D group. CONCLUSIONS Odor identification, balance capability, and knee extension strength were potential markers for cognitive decline in middle-aged persons with T2D.
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Affiliation(s)
- Manabu Midorikawa
- Doctoral Program in Clinical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba 305-8575, Japan
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Hiroaki Suzuki
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Yasuhiro Suzuki
- Department of Rehabilitation Medicine, University of Tsukuba Hospital, Tsukuba 305-8596, Japan
| | - Kazuyoshi Yamauchi
- Department of Laboratory Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Hiroyuki Sato
- Doctoral Program in Clinical Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba 305-8575, Japan
- Department of Psychiatry, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Kiyotaka Nemoto
- Department of Psychiatry, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Yoko Sugano
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Hitoshi Iwasaki
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Motohiro Sekiya
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Shigeru Yatoh
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Naoya Yahagi
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Yasushi Hada
- Department of Rehabilitation Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Tetsuaki Arai
- Department of Psychiatry, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Hitoshi Shimano
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan
- International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Tsukuba 305-8575, Japan
- Life Science Center of Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Tsukuba 305-8575, Japan
- Japan Agency for Medical Research and Development-Core Research for Evolutional Science and Technology (AMED-CREST), Chiyoda-ku 100-0004, Japan
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9
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Sekiya M, Matsuda T, Yamamoto Y, Furuta Y, Ohyama M, Murayama Y, Sugano Y, Ohsaki Y, Iwasaki H, Yahagi N, Yatoh S, Suzuki H, Shimano H. Deciphering genetic signatures by whole exome sequencing in a case of co-prevalence of severe renal hypouricemia and diabetes with impaired insulin secretion. BMC Med Genet 2020; 21:91. [PMID: 32375679 PMCID: PMC7201978 DOI: 10.1186/s12881-020-01031-z] [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] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 04/22/2020] [Indexed: 11/21/2022]
Abstract
Background Renal hypouricemia (RHUC) is a hereditary disorder where mutations in SLC22A12 gene and SLC2A9 gene cause RHUC type 1 (RHUC1) and RHUC type 2 (RHUC2), respectively. These genes regulate renal tubular reabsorption of urates while there exist other genes counterbalancing the net excretion of urates including ABCG2 and SLC17A1. Urate metabolism is tightly interconnected with glucose metabolism, and SLC2A9 gene may be involved in insulin secretion from pancreatic β-cells. On the other hand, a myriad of genes are responsible for the impaired insulin secretion independently of urate metabolism. Case presentation We describe a 67 year-old Japanese man who manifested severe hypouricemia (0.7 mg/dl (3.8–7.0 mg/dl), 41.6 μmol/l (226–416 μmol/l)) and diabetes with impaired insulin secretion. His high urinary fractional excretion of urate (65.5%) and low urinary C-peptide excretion (25.7 μg/day) were compatible with the diagnosis of RHUC and impaired insulin secretion, respectively. Considering the fact that metabolic pathways regulating urates and glucose are closely interconnected, we attempted to delineate the genetic basis of the hypouricemia and the insulin secretion defect observed in this patient using whole exome sequencing. Intriguingly, we found homozygous Trp258* mutations in SLC22A12 gene causing RHUC1 while concurrent mutations reported to be associated with hyperuricemia were also discovered including ABCG2 (Gln141Lys) and SLC17A1 (Thr269Ile). SLC2A9, that also facilitates glucose transport, has been implicated to enhance insulin secretion, however, the non-synonymous mutations found in SLC2A9 gene of this patient were not dysfunctional variants. Therefore, we embarked on a search for causal mutations for his impaired insulin secretion, resulting in identification of multiple mutations in HNF1A gene (MODY3) as well as other genes that play roles in pancreatic β-cells. Among them, the Leu80fs in the homeobox gene NKX6.1 was an unreported mutation. Conclusion We found a case of RHUC1 carrying mutations in SLC22A12 gene accompanied with compensatory mutations associated with hyperuricemia, representing the first report showing coexistence of the mutations with opposed potential to regulate urate concentrations. On the other hand, independent gene mutations may be responsible for his impaired insulin secretion, which contains novel mutations in key genes in the pancreatic β-cell functions that deserve further scrutiny.
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Affiliation(s)
- Motohiro Sekiya
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Takaaki Matsuda
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yuki Yamamoto
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yasuhisa Furuta
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Mariko Ohyama
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yuki Murayama
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yoko Sugano
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yoshinori Ohsaki
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Hitoshi Iwasaki
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Naoya Yahagi
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Shigeru Yatoh
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Hiroaki Suzuki
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Hitoshi Shimano
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
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10
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Nakai E, Hamatani Y, Miyata M, Nakamura E, Kawano Y, Takada Y, Anchi Y, Funabashi S, Hirayama A, Kuroda K, Amano M, Sugano Y, Anzai T, Izumi C. P767Survey of palliative sedation at the end-of-life in terminally ill heart failure patients - a five year experience in national cardiovascular center. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0367] [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: 11/13/2022] Open
Abstract
Abstract
Background
Palliative sedation is a therapeutic option when symptom relief is difficult to achieve at the end-of-life. However, little is known regarding palliative sedation in terminally ill heart failure (HF) patients.
Purpose
To survey the practice of palliative sedation in terminally ill HF patients at a tertiary referral cardiovascular center, and to investigate the efficacy and safety of sedative agents in HF patients.
Methods
We retrospectively reviewed consecutive patients who were referred to palliative care team at our institution between September 2013 and August 2018. Patients who were hospitalized for HF and died during hospitalization despite optimal medical therapy were selected and defined as terminally ill HF. We investigated the practice of palliative sedation in terminally ill HF patients and analysed the vital signs and sedation scale before starting sedative agents and about 1 hour afterward.
Results
Among 95 terminally ill HF patients, 37 were prescribed palliative sedation at the end-of-life (Picture). Of 37 patients (mean age: 70 years, median B-type natriuretic peptide: 1018 pg/ml, median creatinine: 3.0 mg/dl, intravenous inotrope: 81%), 25 were prescribed dexmedetomidine, and 12 were prescribed midazolam as first agent for sedation. Patient's backgrounds were comparable between the two groups. Richmond Agitation-Sedation Scale was significantly reduced (P<0.01), whereas blood pressure and heart rate were not altered after treatments in both groups. In midazolam group, significant decreases were noted regarding respiratory rate (P=0.01) and oxygen saturation (P=0.02); however, these parameters were not changed in dexmedetomidine group (Table).
Table 1. Vital signs and sedation scale Dexmedetomidine group (n=25) Midazolam group (n=12) Baseline After P value Baseline After P value Richmond Agitation-Sedation Scale 1 (0, 1) −1 (−2, 0) <0.01 1 (0, 1) −2 (−3, −1) <0.01 Vital signs Systolic blood pressure (mmHg) 90±15 89±16 0.51 89±21 84±23 0.33 Diastolic blood pressure (mmHg) 52±13 54±11 0.34 60±14 56±23 0.48 Heart rate (beats per minute) 95±20 91±22 0.17 90±21 90±19 0.70 Respiratory rate (breaths per minute) 22±5 20±5 0.24 21±5 17±2 0.01 Oxygen saturation (%) 97±3 96±6 0.59 96±5 94±5 0.02
Picture. Study flowchart
Conclusions
Dexmedetomidine and midazolam were commonly used in real-word practice for HF patients at the end-of-life. Although impact on respiratory system differed by treatments, both agents could be prescribed effectively and safely in terminally ill HF patients.
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Affiliation(s)
- E Nakai
- National Cerebral and Cardiovascular Center, Suita, Japan
| | - Y Hamatani
- National Cerebral and Cardiovascular Center, Suita, Japan
| | - M Miyata
- National Cerebral and Cardiovascular Center, Suita, Japan
| | - E Nakamura
- National Cerebral and Cardiovascular Center, Suita, Japan
| | - Y Kawano
- National Cerebral and Cardiovascular Center, Suita, Japan
| | - Y Takada
- National Cerebral and Cardiovascular Center, Suita, Japan
| | - Y Anchi
- National Cerebral and Cardiovascular Center, Suita, Japan
| | - S Funabashi
- National Cerebral and Cardiovascular Center, Suita, Japan
| | - A Hirayama
- National Cerebral and Cardiovascular Center, Suita, Japan
| | - K Kuroda
- National Cerebral and Cardiovascular Center, Suita, Japan
| | - M Amano
- National Cerebral and Cardiovascular Center, Suita, Japan
| | - Y Sugano
- National Cerebral and Cardiovascular Center, Suita, Japan
| | - T Anzai
- Hokkaido University Graduate School of Medicine, Cardiovascular Medicine, Hokkaido, Japan
| | - C Izumi
- National Cerebral and Cardiovascular Center, Suita, Japan
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11
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Murayama Y, Yahagi N, Takeuchi Y, Aita Y, Mehrazad Saber Z, Wada N, Li E, Piao X, Sawada Y, Shikama A, Masuda Y, Nishi-Tatsumi M, Kubota M, Izumida Y, Miyamoto T, Sekiya M, Matsuzaka T, Nakagawa Y, Sugano Y, Iwasaki H, Kobayashi K, Yatoh S, Suzuki H, Yagyu H, Kawakami Y, Shimano H. Glucocorticoid receptor suppresses gene expression of Rev-erbα (Nr1d1) through interaction with the CLOCK complex. FEBS Lett 2019; 593:423-432. [PMID: 30659595 DOI: 10.1002/1873-3468.13328] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [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: 09/09/2018] [Revised: 12/27/2018] [Accepted: 01/04/2019] [Indexed: 02/05/2023]
Abstract
Glucocorticoids have various medical uses but are accompanied by side effects. The glucocorticoid receptor (GR) has been reported to regulate the clock genes, but the underlying mechanisms are incompletely understood. In this study, we focused on the suppressive effect of the GR on the expression of Rev-erbα (Nr1d1), an important component of the clock regulatory circuits. Here we show that the GR suppresses Rev-erbα expression via the formation of a complex with CLOCK and BMAL1, which binds to the E-boxes in the Nr1d1 promoter. In this GR-CLOCK-BMAL1 complex, the GR does not directly bind to DNA, which is referred to as tethering. These findings provide new insights into the role of the GR in the control of circadian rhythm.
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Affiliation(s)
- Yuki Murayama
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Japan
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Naoya Yahagi
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Japan
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Yoshinori Takeuchi
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Japan
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Yuichi Aita
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Japan
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Zahra Mehrazad Saber
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Japan
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Nobuhiro Wada
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Japan
| | - EnXu Li
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Japan
| | - Xianying Piao
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Japan
| | - Yoshikazu Sawada
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Japan
| | - Akito Shikama
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Japan
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Yukari Masuda
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Japan
| | | | - Midori Kubota
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Japan
| | - Yoshihiko Izumida
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Japan
| | - Takafumi Miyamoto
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Motohiro Sekiya
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Takashi Matsuzaka
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Yoshimi Nakagawa
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Yoko Sugano
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Hitoshi Iwasaki
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Kazuto Kobayashi
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Shigeru Yatoh
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Hiroaki Suzuki
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Hiroaki Yagyu
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Yasushi Kawakami
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
| | - Hitoshi Shimano
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Japan
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12
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Funabashi S, Nagai T, Nakano H, Iwakami N, Honda S, Sugano Y, Asaumi Y, Aiba T, Izumi C, Noguchi T, Kusano K, Yokoyama H, Yasuda S, Ogawa H, Anzai T. P3435Long-term prognostic significance of renal tubular damage, as assessed by urinary Nacetyl-beta-D-glucosamidase, on admission in patients with acute heart failure. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p3435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- S Funabashi
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - T Nagai
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - H Nakano
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - N Iwakami
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - S Honda
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - Y Sugano
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - Y Asaumi
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - T Aiba
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - C Izumi
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - T Noguchi
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - K Kusano
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - H Yokoyama
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - S Yasuda
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - H Ogawa
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - T Anzai
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
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13
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Kato Y, Amaki M, Hamatani Y, Okada A, Takahama H, Hasegawa T, Sugano Y, Kanzaki H, Yasuda S, Izumi C. P1587Clinical outcome of isolated tricuspid regurgitation on stable heart failure. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Y Kato
- National Cerebral and Cardiovascular Center Hospital, Cardiology, Osaka, Japan
| | - M Amaki
- National Cerebral and Cardiovascular Center Hospital, Cardiology, Osaka, Japan
| | - Y Hamatani
- National Cerebral and Cardiovascular Center Hospital, Cardiology, Osaka, Japan
| | - A Okada
- National Cerebral and Cardiovascular Center Hospital, Cardiology, Osaka, Japan
| | - H Takahama
- National Cerebral and Cardiovascular Center Hospital, Cardiology, Osaka, Japan
| | - T Hasegawa
- National Cerebral and Cardiovascular Center Hospital, Cardiology, Osaka, Japan
| | - Y Sugano
- National Cerebral and Cardiovascular Center Hospital, Cardiology, Osaka, Japan
| | - H Kanzaki
- National Cerebral and Cardiovascular Center Hospital, Cardiology, Osaka, Japan
| | - S Yasuda
- National Cerebral and Cardiovascular Center Hospital, Cardiology, Osaka, Japan
| | - C Izumi
- National Cerebral and Cardiovascular Center Hospital, Cardiology, Osaka, Japan
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14
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Nakagawa S, Okada A, Hamatani Y, Takahama H, Amaki M, Hasegawa T, Sugano Y, Kanzaki H, Kusano K, Yasuda S, Izumi C. 5920Usefulness of SCD risk prediction model among various phenotypes of hypertrophic cardiomyopathy in Japanese population. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.5920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S Nakagawa
- National Cerebral and Cardiovascular Center, Cardiovascular Center, Suita, Japan
| | - A Okada
- National Cerebral and Cardiovascular Center, Cardiovascular Center, Suita, Japan
| | - Y Hamatani
- National Cerebral and Cardiovascular Center, Cardiovascular Center, Suita, Japan
| | - H Takahama
- National Cerebral and Cardiovascular Center, Cardiovascular Center, Suita, Japan
| | - M Amaki
- National Cerebral and Cardiovascular Center, Cardiovascular Center, Suita, Japan
| | - T Hasegawa
- National Cerebral and Cardiovascular Center, Cardiovascular Center, Suita, Japan
| | - Y Sugano
- National Cerebral and Cardiovascular Center, Cardiovascular Center, Suita, Japan
| | - H Kanzaki
- National Cerebral and Cardiovascular Center, Cardiovascular Center, Suita, Japan
| | - K Kusano
- National Cerebral and Cardiovascular Center, Cardiovascular Center, Suita, Japan
| | - S Yasuda
- National Cerebral and Cardiovascular Center, Cardiovascular Center, Suita, Japan
| | - C Izumi
- National Cerebral and Cardiovascular Center, Cardiovascular Center, Suita, Japan
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15
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Hamatani Y, Amaki M, Kanzaki H, Yanagi Y, Yonezawa R, Jo Y, Okada A, Takahama H, Hasegawa T, Sugano Y, Yasuda S, Izumi C. P4406Significance of exercise-induced pulmonary hypertension in patients with hypertrophic cardiomyopathy. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Y Hamatani
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - M Amaki
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - H Kanzaki
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - Y Yanagi
- National Cerebral and Cardiovascular Center, Clinical Laboratory, Osaka, Japan
| | - R Yonezawa
- National Cerebral and Cardiovascular Center, Clinical Laboratory, Osaka, Japan
| | - Y Jo
- National Cerebral and Cardiovascular Center, Clinical Laboratory, Osaka, Japan
| | - A Okada
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - H Takahama
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - T Hasegawa
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - Y Sugano
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - S Yasuda
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
| | - C Izumi
- National Cerebral and Cardiovascular Center, Cardiovascular Medicine, Osaka, Japan
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16
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Okamoto C, Okada A, Kanzaki H, Hamatani Y, Takahama H, Amaki M, Hasegawa T, Sugano Y, Fujita T, Kobayashi J, Yasuda S, Izumi C. P2577Peak E wave velocity may predict cardiovascular events in asymptomatic degenerative mitral regurgitation in sinus rhythm. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p2577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- C Okamoto
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - A Okada
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - H Kanzaki
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - Y Hamatani
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - H Takahama
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - M Amaki
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - T Hasegawa
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - Y Sugano
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - T Fujita
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - J Kobayashi
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - S Yasuda
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
| | - C Izumi
- National Cerebral and Cardiovascular Center, Department of Cardiovascular Medicine, Osaka, Japan
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17
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Furukawa S, Suzuki H, Fujihara K, Kobayashi K, Iwasaki H, Sugano Y, Yatoh S, Sekiya M, Yahagi N, Shimano H. Malondialdehyde-modified LDL-related variables are associated with diabetic kidney disease in type 2 diabetes. Diabetes Res Clin Pract 2018; 141:237-243. [PMID: 29775676 DOI: 10.1016/j.diabres.2018.05.019] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 04/03/2018] [Accepted: 05/09/2018] [Indexed: 12/20/2022]
Abstract
BACKGROUND AND AIMS Oxidized low-density lipoprotein (oxLDL) causes the development of atherosclerosis and kidney injury. Although circulating oxLDL levels were reportedly increased in type 2 diabetic patients with macroalbuminuria, it remains unclear whether albuminuria or the reduced glomerular filtration rate (GFR) is independently associated with the circulating oxLDL level. This study aimed to elucidate the association between the stage of diabetic nephropathy and serum malondialdehyde-modified LDL (MDA-LDL) and the ratio of MDA-LDL to LDL-cholesterol (MDA-LDL/LDL). METHODS AND RESULTS This retroactive cross-sectional study used data from 402 patients with type 2 diabetes. Patients undergoing hemodialysis were excluded. Serum MDA-LDL levels were significantly increased with increases in severity of albuminuria (103 ± 44 U/L, 109 ± 54 U/L, and 135 ± 72 U/L for normoalbuminuria, microalbuminuria, and macroalbuminuria, respectively; P for trend = 0.020) but not according to the estimated GFR (eGFR). An increased MDA-LDL/LDL ratio was significantly associated with both increased albuminuria (35 ± 13, 37 ± 14, and 40 ± 15 for normoalbuminuria, microalbuminuria, and macroalbuminuria, respectively; P for trend = 0.003) and reduced eGFR (34 ± 13, 36 ± 13, 38 ± 12, and 51 ± 28 for grade 1, 2, 3 and 4, respectively; P for trend = 0.002). Multiple linear regression analysis showed that neither the albumin excretion rate nor eGFR but ln-transformed triglycerides and LDL-C levels were independent determinants of both serum MDA-LDL levels and MDA-LDL/LDL ratios. CONCLUSION Serum MDA-LDL levels and MDA-LDL/LDL ratios were increased in those with dyslipidemia associated with diabetic kidney disease.
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Affiliation(s)
- Shoko Furukawa
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Hiroaki Suzuki
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan.
| | - Kazuya Fujihara
- Department of Hematology, Endocrinology and Metabolism, Niigata University Faculty of Medicine, Niigata, Japan
| | - Kazuto Kobayashi
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Hitoshi Iwasaki
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Yoko Sugano
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Shigeru Yatoh
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Motohiro Sekiya
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Naoya Yahagi
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Hitoshi Shimano
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan; International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Tsukuba, Ibaraki, Japan
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18
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Matsumura-Matsuda E, Sekiya M, Omoto-Inuzuka M, Santo K, Shikama A, Kuba M, Sugano Y, Iwasaki H, Yatoh S, Sato T, Hara H, Takekoshi K, Suzuki H, Shimano H. A Rare Coexistence of Pheochromocytoma and Parkinson's Disease With Diagnostic Challenges. Intern Med 2018; 57:979-985. [PMID: 29269645 PMCID: PMC5919857 DOI: 10.2169/internalmedicine.9242-17] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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] [Indexed: 12/02/2022] Open
Abstract
We herein report a case of pheochromocytoma occurring in the course of Parkinson's disease. The coexistence of these two disease is extremely rare, with only four cases hitherto reported across the public databases. It is also noteworthy that biochemical tests, which are critical for the diagnosis of pheochromocytoma, are severely confounded by dopaminergic medications for Parkinson's disease, highlighting the importance of image-based modalities in this setting. We further attempted to gain insight into the potential molecular mechanisms, proposing that hypoxia-inducible factor signaling could make these two diseases mutually exclusive, while excessive reactive oxygen species could enable their coexistence.
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Affiliation(s)
- Erika Matsumura-Matsuda
- Department of Internal Medicine (Endocrinology and Metabolism), University of Tsukuba, Japan
| | - Motohiro Sekiya
- Department of Internal Medicine (Endocrinology and Metabolism), University of Tsukuba, Japan
| | - Miyoko Omoto-Inuzuka
- Department of Internal Medicine (Endocrinology and Metabolism), University of Tsukuba, Japan
| | - Kana Santo
- Department of Internal Medicine (Endocrinology and Metabolism), University of Tsukuba, Japan
| | - Akito Shikama
- Department of Internal Medicine (Endocrinology and Metabolism), University of Tsukuba, Japan
| | - Motoko Kuba
- Department of Internal Medicine (Endocrinology and Metabolism), University of Tsukuba, Japan
| | - Yoko Sugano
- Department of Internal Medicine (Endocrinology and Metabolism), University of Tsukuba, Japan
| | - Hitoshi Iwasaki
- Department of Internal Medicine (Endocrinology and Metabolism), University of Tsukuba, Japan
| | - Shigeru Yatoh
- Department of Internal Medicine (Endocrinology and Metabolism), University of Tsukuba, Japan
| | - Taiki Sato
- Department of Pathology, University of Tsukuba, Japan
| | - Hisato Hara
- Department of Surgery, University of Tsukuba, Japan
| | - Kazuhiro Takekoshi
- Department of Molecular Laboratory Medicine, University of Tsukuba, Japan
| | - Hiroaki Suzuki
- Department of Internal Medicine (Endocrinology and Metabolism), University of Tsukuba, Japan
| | - Hitoshi Shimano
- Department of Internal Medicine (Endocrinology and Metabolism), University of Tsukuba, Japan
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19
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Piao X, Yahagi N, Takeuchi Y, Aita Y, Murayama Y, Sawada Y, Shikama A, Masuda Y, Nishi-Tatsumi M, Kubota M, Izumida Y, Sekiya M, Matsuzaka T, Nakagawa Y, Sugano Y, Iwasaki H, Kobayashi K, Yatoh S, Suzuki H, Yagyu H, Kawakami Y, Shimano H. A candidate functional SNP rs7074440 in TCF7L2 alters gene expression through C-FOS in hepatocytes. FEBS Lett 2018; 592:422-433. [PMID: 29331016 DOI: 10.1002/1873-3468.12975] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 12/11/2017] [Accepted: 01/08/2018] [Indexed: 01/25/2023]
Abstract
The SNP rs7903146 at the transcription factor 7-like 2 (TCF7L2) locus is established as the strongest known genetic marker for type 2 diabetes via genome-wide association studies. However, the functional SNPs regulating TCF7L2 expression remain unclear. Here, we show that the SNP rs7074440 is a candidate functional SNP highly linked with rs7903146. A reporter plasmid with rs7074440 normal allele sequence exhibited 15-fold higher luciferase activity compared with risk allele sequence in hepatocytes, demonstrating a strong enhancer activity at rs7074440. Additionally, we identified C-FOS as an activator binding to the rs7074440 enhancer using a TFEL genome-wide screen method. Consistently, knockdown of C-FOS significantly reduced TCF7L2 expression in hepatocytes. Collectively, a novel enhancer regulating TCF7L2 expression was revealed through searching for functional SNPs.
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Affiliation(s)
- Xianying Piao
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Naoya Yahagi
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Yoshinori Takeuchi
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Yuichi Aita
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Yuki Murayama
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Yoshikazu Sawada
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Akito Shikama
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Yukari Masuda
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Makiko Nishi-Tatsumi
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Midori Kubota
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Yoshihiko Izumida
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Motohiro Sekiya
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Takashi Matsuzaka
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Yoshimi Nakagawa
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Yoko Sugano
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Hitoshi Iwasaki
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Kazuto Kobayashi
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Shigeru Yatoh
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Hiroaki Suzuki
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Hiroaki Yagyu
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Yasushi Kawakami
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Hitoshi Shimano
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
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20
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Sawada Y, Izumida Y, Takeuchi Y, Aita Y, Wada N, Li E, Murayama Y, Piao X, Shikama A, Masuda Y, Nishi-Tatsumi M, Kubota M, Sekiya M, Matsuzaka T, Nakagawa Y, Sugano Y, Iwasaki H, Kobayashi K, Yatoh S, Suzuki H, Yagyu H, Kawakami Y, Kadowaki T, Shimano H, Yahagi N. Effect of sodium-glucose cotransporter 2 (SGLT2) inhibition on weight loss is partly mediated by liver-brain-adipose neurocircuitry. Biochem Biophys Res Commun 2017; 493:40-45. [PMID: 28928093 DOI: 10.1016/j.bbrc.2017.09.081] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 09/15/2017] [Indexed: 01/06/2023]
Abstract
Sodium-glucose cotransporter 2 (SGLT2) inhibitors have both anti-diabetic and anti-obesity effects. However, the precise mechanism of the anti-obesity effect remains unclear. We previously demonstrated that the glycogen depletion signal triggers lipolysis in adipose tissue via liver-brain-adipose neurocircuitry. In this study, therefore, we investigated whether the anti-obesity mechanism of SGLT2 inhibitor is mediated by this mechanism. Diet-induced obese mice were subjected to hepatic vagotomy (HVx) or sham operation and loaded with high fat diet containing 0.015% tofogliflozin (TOFO), a highly selective SGLT2 inhibitor, for 3 weeks. TOFO-treated mice showed a decrease in fat mass and the effect of TOFO was attenuated in HVx group. Although both HVx and sham mice showed a similar level of reduction in hepatic glycogen by TOFO treatment, HVx mice exhibited an attenuated response in protein phosphorylation by protein kinase A (PKA) in white adipose tissue compared with the sham group. As PKA pathway is known to act as an effector of the liver-brain-adipose axis and activate triglyceride lipases in adipocytes, these results indicated that SGLT2 inhibition triggered glycogen depletion signal and actuated liver-brain-adipose axis, resulting in PKA activation in adipocytes. Taken together, it was concluded that the effect of SGLT2 inhibition on weight loss is in part mediated via the liver-brain-adipose neurocircuitry.
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Affiliation(s)
- Yoshikazu Sawada
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Yoshihiko Izumida
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Department of Internal Medicine, Graduate School of Medicine, University of Tokyo, Tokyo, 113-8655, Japan
| | - Yoshinori Takeuchi
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Yuichi Aita
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Nobuhiro Wada
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Department of Internal Medicine, Graduate School of Medicine, University of Tokyo, Tokyo, 113-8655, Japan
| | - EnXu Li
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Department of Internal Medicine, Graduate School of Medicine, University of Tokyo, Tokyo, 113-8655, Japan
| | - Yuki Murayama
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Xianying Piao
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Akito Shikama
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Yukari Masuda
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Department of Internal Medicine, Graduate School of Medicine, University of Tokyo, Tokyo, 113-8655, Japan
| | - Makiko Nishi-Tatsumi
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Midori Kubota
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Department of Internal Medicine, Graduate School of Medicine, University of Tokyo, Tokyo, 113-8655, Japan
| | - Motohiro Sekiya
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Takashi Matsuzaka
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Yoshimi Nakagawa
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Yoko Sugano
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Hitoshi Iwasaki
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Kazuto Kobayashi
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Shigeru Yatoh
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Hiroaki Suzuki
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Hiroaki Yagyu
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Yasushi Kawakami
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Takashi Kadowaki
- Department of Internal Medicine, Graduate School of Medicine, University of Tokyo, Tokyo, 113-8655, Japan
| | - Hitoshi Shimano
- Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan
| | - Naoya Yahagi
- Nutrigenomics Research Group, Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Department of Internal Medicine (Endocrinology and Metabolism), Faculty of Medicine, University of Tsukuba, Ibaraki, 305-8575, Japan; Department of Internal Medicine, Graduate School of Medicine, University of Tokyo, Tokyo, 113-8655, Japan.
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21
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Koga M, Sugano Y, Ueda N, Nakashima Y, Shibata A, Nakayama T, Yokokawa T, Nagai T, Kanzaki H, Yasuda S, Anzai T. P6155Significance of non-thyroidal illness syndrome in patients with dilated cardiomyopathy. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p6155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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22
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Nakashima Y, Sugano Y, Koga M, Shibata A, Ueda N, Nagai T, Kanzaki H, Yasuda S, Anzai T. P707Poor clinical outcome in patients with increased high-sensitive cardiac troponin T in dilated cardiomyopathy: in the context of left ventricular wall stress. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx501.p707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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23
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Akiyama M, Takino S, Sugano Y, Yamada T, Nakata A, Miura T, Fukumoto M, Yamashiro H. EFFECT OF SEASONAL CHANGES ON TESTICULAR MORPHOLOGY AND THE EXPRESSION OF CIRCADIAN CLOCK GENES IN JAPANESE WOOD MICE (APODEMUS SPECIOSUS). J BIOL REG HOMEOS AG 2015; 29:589-600. [PMID: 26403397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This study aimed to determine the seasonality of reproduction throughout the year in Japanese wood mice (Apodemus speciosus). The effect of seasonal changes on testicular morphology and the periodic expression of circadian clock genes in the hypothalamus and testes of male individuals was evaluated. We also examined the morphology of the testes and caudae epididymides of male mice. In addition, RT-PCR analysis was carried out with mRNA extracted from the hypothalamus and testes to evaluate the expression of the circadian clock genes Clock, Bmal1, Per1, and Cry1. The complete induction of testicular activity was detected from February to April and from August to October, with testes weight increasing with the completion of spermatogenesis (reproductive season). From May to early June and from November to early January, testicular weight declined, the seminiferous tubules reduced in size, spermatogenesis was arrested, and sperm were not produced (non-reproductive season). From mid- June to July and mid-January, the re-induction of testicular activity for spermatogenesis was observed in the seminiferous tubules (transitional season). Out of the four examined genes, Cry1 had the highest expression level in both the hypothalamus and testes throughout the year, followed by Bmal1, Per1, and Clock. The expression of Bmal1 was significantly lower in the hypothalamus and testes during the transitional season compared to the reproductive and non-reproductive seasons. Cry1 transcript levels were also significantly lower in the hypothalamus and testes during the transitional season compared to the reproductive season. In conclusion, the results indicating changes in testicular morphology revealed annual reproductive, non-reproductive, and transmission periods in Japanese wood mice. When an increase in testicular activity was observed indicating the onset of the reproductive season, the mean day length was approximately 1113 h. The expression of the circadian clock genes Bmal1 and Cry1 in the hypothalamus and testes during the reproductive season was significantly higher than that of the same genes during the transitional season. Consequently, completion of spermatogenesis occurred in the seminiferous tubules of Japanese wood mice testes during the reproductive period.
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Affiliation(s)
- M Akiyama
- Faculty of Agriculture, Niigata University, Niigata, Japan
| | - S Takino
- Faculty of Agriculture, Niigata University, Niigata, Japan
| | - Y Sugano
- Faculty of Agriculture, Niigata University, Niigata, Japan
| | - T Yamada
- Faculty of Agriculture, Niigata University, Niigata, Japan
| | - A Nakata
- Division of Life Science, Hokkaido Pharmaceutical University School of Pharmacy, Hokkaido, Japan
| | - T Miura
- Graduate School of Health Sciences, Hirosaki University, Aomori, Japan
| | - M Fukumoto
- Institute of Development, Aging and Cancer, Tohoku University, Miyagi, Japan
| | - H Yamashiro
- Faculty of Agriculture, Niigata University, Niigata, Japan
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24
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Sugano Y, Anzai T, Yokoyama H, Nagai T, Kanzaki H, Ishihara M, Shimizu W, Yasuda S, Ogawa H. Prognostic significance of tricuspid valve regurgitation in patients with autely decompensated heart failure. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.1725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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25
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Nagai T, Anzai T, Yokoyama H, Sugano Y, Sakamoto H, Noguchi T, Ishihara M, Shimizu W, Yasuda S, Ogawa H. Impact of left ventricular systolic diameter on the in-hospital improvement of systolic function in acute decompensated heart failure with high blood pressure presentation. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.1724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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26
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Abstract
Dye-decolorizing peroxidase (DyP) is produced by a basidiomycete (Thanatephorus cucumeris Dec 1) and is a member of a novel heme peroxidase family (DyP-type peroxidase family) that appears to be distinct from general peroxidases. Thus far, 80 putative members of this family have been registered in the PeroxiBase database (http://peroxibase.isbsib.ch/) and more than 400 homologous proteins have been detected via PSI-BLAST search. Although few studies have characterized the function and structure of these proteins, they appear to be bifunctional enzymes with hydrolase or oxygenase, as well as typical peroxidase activities. DyP-type peroxidase family suggests an ancient root compared with other general peroxidases because of their widespread distribution in the living world. In this review, firstly, an outline of the characteristics of DyP from T. cucumeris is presented and then interesting characteristics of the DyP-type peroxidase family are discussed.
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Affiliation(s)
- Y Sugano
- Tokyo Institute of Technology, Nagatsuta, Midori-ku, Yokohama, Japan.
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27
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Kida H, Sugano Y, Iizuka R, Fujihashi M, Yohda M, Miki K. Structural and molecular characterization of the prefoldin beta subunit from Thermococcusstrain. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308089162] [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: 11/10/2022] Open
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28
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Ding YS, Sugano Y, Fowler JS, Salata C. Synthesis of the racemate and individual enantiomers of [11C]methylphenidate for studying presynaptic dopaminergic neuron with positron emission tomography. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580341012] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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29
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Sugano Y, Matsuo C, Shoda M. Efficient production of a heterologous peroxidase, DyP from Geotrichum candidum Dec 1, on solid-state culture of Aspergillus oryzae RD005. J Biosci Bioeng 2005; 92:594-7. [PMID: 16233153 DOI: 10.1263/jbb.92.594] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2001] [Accepted: 09/19/2001] [Indexed: 11/17/2022]
Abstract
The productivity of a peroxidase (DyP) originating from Geotrichum candidum Dec 1 was enhanced in the solid-state culture using Aspergillus oryzae RD005. When the humidity, water content, and temperature were adjusted to 60%, 50% and 27 degrees C, respectively, the productivity of DyP reached 5.3 g per kilogram wheat bran, which was used as the solid medium. The yield of 5.3 g per kg wheat bran corresponded to the yield of a 56 kg submerged culture. The productivity per gram carbon of the medium in the solid-state culture was 4.1-fold that in the submerged culture.
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Affiliation(s)
- Y Sugano
- Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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30
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Sugano Y, Sasaki K, Shoda M. cDNA cloning and genetic analysis of a novel decolorizing enzyme, peroxidase gene dyp from Geotrichum candidum Dec 1. J Biosci Bioeng 2005; 87:411-7. [PMID: 16232492 DOI: 10.1016/s1389-1723(99)80087-5] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/1998] [Accepted: 01/06/1999] [Indexed: 11/23/2022]
Abstract
A novel decolorizing peroxidase gene (dyp) was cloned from a cDNA library of a newly isolated strain of fungus Geotrichum candidum Dec 1. The open reading frame of 1494 nucleotides which corresponds to dyp predicts a primary translation product of 498 amino acids, M(r) 53,306. The deduced amino acid sequence of DyP does not contain the typical conserved motif which is characteristic of heme-containing peroxidases in the plant peroxidase superfamily. Comparison of the deduced amino acid sequence of DyP with that of a peroxidase from Polyporaceae sp. suggests that these proteins share highly homologous regions.
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Affiliation(s)
- Y Sugano
- Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama 226-8503, Japan
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31
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Noro N, Sugano Y, Shoda M. Utilization of the buffering capacity of corn steep liquor in bacterial cellulose production by Acetobacter xylinum. Appl Microbiol Biotechnol 2004; 64:199-205. [PMID: 14564490 DOI: 10.1007/s00253-003-1457-6] [Citation(s) in RCA: 31] [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] [Subscribe] [Scholar Register] [Received: 05/09/2003] [Revised: 08/05/2003] [Accepted: 09/07/2003] [Indexed: 10/26/2022]
Abstract
Acetobacter xylinum BPR2001 produces water-insoluble bacterial cellulose (BC). Using a pH sensor for the accurate control of pH, which is one of the most critical factors for efficient BC production, is difficult especially in a baffled shake-flask and an airlift reactor. The buffering capacity of corn steep liquor (CSL) was estimated by measuring beta (buffering capacity) values in advance and was used to maintain the pH within the optimal range during the production of BC. When CSL was added to either a shake-flask, a stirred-tank reactor or an airlift reactor, BC production was almost the same as that in cultivations where pH was controlled manually or by a pH sensor.
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Affiliation(s)
- N Noro
- Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, 226-8503, Yokohama, Japan
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32
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Bae SO, Sugano Y, Ohi K, Shoda M. Features of bacterial cellulose synthesis in a mutant generated by disruption of the diguanylate cyclase 1 gene of Acetobacter xylinum BPR 2001. Appl Microbiol Biotechnol 2004; 65:315-22. [PMID: 15042328 DOI: 10.1007/s00253-004-1593-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2003] [Revised: 02/06/2004] [Accepted: 02/13/2004] [Indexed: 10/26/2022]
Abstract
The diguanylate cyclase 1 (DGC1) (dgc1) gene in Acetobacter xylinum BPR 2001--a bacterial cellulose (BC) producer--was cloned and sequenced, and a DGC1 gene-disrupted mutant, strain DD, was constructed. The production and structural characteristics of the BC formed by DD were compared with those of the parental strain BPR 2001. BC production by DD was almost the same as that by BPR 2001 in static cultivation and in shake flask cultivation. However, in a jar fermentor DD produced about 36% more BC than the parental strain. DD produced suspended particle materials that cannot aggregate owing to their random structural characteristics in static cultivation; more uniformly dispersed BC pellicles and smaller BC pellets are produced on average in a jar fermentor, as reflected by the higher BC production by DD than by the parental strain in a jar fermentor. Micrographs of BC produced by DD revealed that the width of cellulose ribbons assemblies decreased as a result of differences in the ultrastructure and mechanism of formation of BC between the two strains. These results reveal that disruption of the dgc1 gene, which catalyzes synthesis of c-di-GMP (an effector of BC synthase), is not fatal for BC synthesis, although it affects BC structure.
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Affiliation(s)
- S O Bae
- Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503, Japan
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33
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Matsumoto A, Sugano Y, Yasuda M, Takimoto K. Role of multi-detector row CT angiography in the management of gastric fundal varices. Gut 2004; 53:467; author reply 467. [PMID: 14960536 PMCID: PMC1773970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
Affiliation(s)
- A Matsumoto
- Takeda General Hospital, 28-1 Ishida Moriminadi-cho, Fushimi, Kyoto, Japan
| | - Y Sugano
- Takeda General Hospital, 28-1 Ishida Moriminadi-cho, Fushimi, Kyoto, Japan
| | - M Yasuda
- Takeda General Hospital, 28-1 Ishida Moriminadi-cho, Fushimi, Kyoto, Japan
| | - K Takimoto
- Takeda General Hospital, 28-1 Ishida Moriminadi-cho, Fushimi, Kyoto, Japan
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34
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Shima E, Hino M, Yamane T, Aoyama Y, Nakamae H, Yamamura R, Makita K, Sugano Y, Yasuda S, Takubo T, Ohta K, Tatsumi N. Acute rhabdomyolysis following administration of high-dose cyclophosphamide: case report. Ann Hematol 2002; 81:55-6. [PMID: 11807638 DOI: 10.1007/s00277-001-0399-2] [Citation(s) in RCA: 15] [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] [Received: 05/22/2001] [Accepted: 10/11/2001] [Indexed: 11/28/2022]
Abstract
Rhabdomyolysis is an unusual complication of hematopoietic stem cell transplantation (HSCT). Cyclophosphamide has been one of the key drugs in the most common preparative regimen for HSCT. We present here a rare case of acute rhabdomyolysis following administration of high-dose cyclophosphamide. A 47-year-old woman with adult T-cell leukemia in remission was treated with high-dose cyclophosphamide as a preparative regimen for allogeneic bone marrow transplantation. Nineteen hours later, general convulsions and acidosis suddenly occurred. Levels of serum creatine kinase (skeletal muscle type), myoglobin, and aldolase were markedly elevated to 32870 IU/l, 640 ng/ml, and 240.3 IU/l, respectively. Rhabdomyolysis caused by high-dose cyclophosphamide was diagnosed, and the preparative chemotherapy was discontinued. Subsequently, her muscular signs and symptoms improved, and the results of laboratory examinations returned to normal after 2 weeks. She had previously been treated with conventional doses of cyclophosphamide, doxorubicin, vincristine, and prednisolone without evidence of rhabdomyolysis. Acute rhabdomyolysis may be an adverse effect specific to high-dose cyclophosphamide therapy.
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Affiliation(s)
- E Shima
- Department of Clinical Hematology, Osaka City University Medical School, 1-4-3 Asahimachi, Abeno-ku, Osaka 545-8585, Japan
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35
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Chao Y, Mitarai M, Sugano Y, Shoda M. Effect of addition of water-soluble polysaccharides on bacterial cellulose production in a 50-L airlift reactor. Biotechnol Prog 2001; 17:781-5. [PMID: 11485444 DOI: 10.1021/bp010046b] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Bacterial cellulose (BC) production was carried out in a batch cultivation of Acetobacter xylinum in a 50-L internal loop airlift reactor by addition of water-soluble polysaccharides into the medium. When 0.1% (w/w) agar was added, BC production reached 8.7 g/L compared with 6.3 g/L in the control, and duration of the cultivation period to reach the maximum concentration of BC was almost half of that without addition of polysaccharides. During cultivation, BC was formed into pellets whose size was smaller when the productivity of BC was higher, indicating that increase in the relative viscosity by addition of polysaccharides hindered formation of large clumps of BC and increase in the volumetric oxygen transfer coefficient at high flow rate led to increase in BC productivity.
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Affiliation(s)
- Y Chao
- Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503 Japan
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36
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Chao Y, Sugano Y, Shoda M. Bacterial cellulose production under oxygen-enriched air at different fructose concentrations in a 50-liter, internal-loop airlift reactor. Appl Microbiol Biotechnol 2001; 55:673-9. [PMID: 11525613 DOI: 10.1007/s002530000503] [Citation(s) in RCA: 53] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Bacterial cellulose (BC) production by Acetobacter xylinum subsp. sucrofermentans BPR2001 was carried out in a 50-1 internal-loop airlift reactor in air at an initial fructose concentration of 40 g/l. The BC production rate was 0.059 g/l per h. When oxygen-enriched air was supplied instead of air, the BC production rate increased to 0.093 g/l per h, and the BC yield was enhanced from 11% in air to 18%. When the initial fructose concentrations were varied from 30 to 70 g/l, the highest BC yield (35%) the highest production rate (0.22 g/l x per h), and the highest concentration of BC produced (10.4 g/l) were observed at 60-70 g/l fructose. From the carbon mass balance calculated at the final stage of cultivation, it was observed that enhanced BC production was reflected as a decrease in both CO2 evolution and the concentration of other unknown substances, suggesting the efficient utilization of energy for BC synthesis despite O2 limitation.
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Affiliation(s)
- Y Chao
- Research Laboratory of Resources Utilization, Tokyo Institute of Technology, Yokohama, Japan
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37
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Matsuzaki K, Date M, Furukawa F, Tahashi Y, Matsushita M, Sugano Y, Yamashiki N, Nakagawa T, Seki T, Nishizawa M, Fujisawa J, Inoue K. Regulatory mechanisms for transforming growth factor beta as an autocrine inhibitor in human hepatocellular carcinoma: implications for roles of smads in its growth. Hepatology 2000; 32:218-27. [PMID: 10915727 DOI: 10.1053/jhep.2000.9145] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Transforming growth factor beta (TGF-beta) initiates signaling through heteromeric complexes of transmembrane type I and type II serine/threonine kinase receptors. Activated TGF-beta type I receptor phosphorylates receptor-regulated Smads (2 and 3). Antagonistic Smad 7 forms stable association with the activated TGF-beta type I receptor, blocking phosphorylation of receptor-regulated Smads. On the other hand, elevated serum concentration of TGF-beta along with resistance to its growth-inhibitory effect is commonly observed in human hepatocellular carcinoma (HCC) patients. In this study, we investigated the mechanisms of resistance to tumor-derived TGF-beta in human HCC and hepatoblastoma-derived cell lines, focusing on the roles of receptor-regulated Smads and antagonistic Smad 7. HuH-7 and HepG2 cells showed poor response to TGF-beta-mediated growth inhibition. Because neutralization of TGF-beta in the medium or blockage of signal transduction pathway by inductions of dominant negative Smad 2/3 resulted in a stimulation of cell growth, tumor-derived TGF-beta signal acts on cell growth negatively. However, Smad 7 induced by TGF-beta negatively regulated Smad 2 action and rendered most Smad 2 proteins in the cytoplasm. Taken together, these results indicate that endogenous TGF-beta-mediated induction of Smad 7 results in a higher "threshold" for the antiproliferative signals mediated by receptor-regulated Smads, and can be involved in reduced responsiveness to the cytokine in some human HCC cells.
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Affiliation(s)
- K Matsuzaki
- Third Department of Internal Medicine, Kansai Medical University, Osaka, Japan.
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38
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Abstract
Bacterial cellulose (BC) production was realized in a batch cultivation of Acetobacter xylinum subsp. sucrofermentans BPR2001 in a 50-L internal-loop airlift reactor. When the bacterium was cultivated with air supply, 3.8 g/L of BC was produced after 67 hours. When oxygen-enriched gas was supplied, the concentration of BC was doubled and the production rate of BC was 0.116 g/L. h, which was two times higher than that of air-supplied culture and comparable to that in a mechanically agitated stirred-tank fermentor. Bacterial cellulose produced by the airlift reactor formed a unique ellipse pellet (BC pellet), different from the fibrous form which was produced in an agitated stirred-tank fermentor. The BC-pellet suspension was demonstrated to have a higher volumetric oxygen transfer coefficient than the fibrous BC suspension in a 50-L internal-loop airlift reactor. The mixing time of BC-pellet suspension in the airlift reactor was also shorter than that in water.
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Affiliation(s)
- Y Chao
- Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8503 Japan
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39
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Sugano Y, Nakano R, Sasaki K, Shoda M. Efficient heterologous expression in Aspergillus oryzae of a unique dye-decolorizing peroxidase, DyP, of Geotrichum candidum Dec 1. Appl Environ Microbiol 2000; 66:1754-8. [PMID: 10742277 PMCID: PMC92058 DOI: 10.1128/aem.66.4.1754-1758.2000] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Efficient expression of the dye-decolorizing peroxidase, DyP, from Geotrichum candidum Dec 1 in Aspergillus oryzae M-2-3 was achieved by fusing mature cDNA encoding dyp with the A. oryzae alpha-amylase promoter (amyB). The activity yield of the purified recombinant DyP (rDyP) was 42-fold compared with that of the purified native DyP from Dec 1. No exogenous heme was necessary for the expression of rDyP in A. oryzae. From the N-terminal amino acid sequence analyses of native DyP and rDyP, the absence of a histidine residue in both DyPs, which was considered to be important for heme binding of DyP, was confirmed. These results suggest that rDyP without a typical heme-binding region produced by A. oryzae exhibits a function similar to that of native DyP.
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Affiliation(s)
- Y Sugano
- Research Laboratory of Resources Utilization, Tokyo Institute of Technology, Midori-ku, Yokohama 226-8503, Japan
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40
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Kiyota K, Habu Y, Sugano Y, Inokuchi H, Mizuno S, Kimoto K, Kawai K. Comparison of 1-week and 2-week triple therapy with omeprazole, amoxicillin, and clarithromycin in peptic ulcer patients with Helicobacter pylori infection: results of a randomized controlled trial. J Gastroenterol 2000; 34 Suppl 11:76-9. [PMID: 10616771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This study was a comparison of 1-week and 2-week triple therapies with omeprazole, amoxicillin, and clarithromycin (OAC) in patients with peptic ulcer disease and Helicobacter pylori infection. A total of 147 peptic ulcer patients with H. pylori infection assessed by histology and culture were randomly treated with omeprazole 20mg bid + amoxicillin 1000mg bid + clarithromycin 400mg bid for either 1 week (OAC1w) or 2 weeks (OAC2w). Both groups then received omeprazole 20mg daily for 2 weeks followed by ranitidine 300mg daily for 4 weeks. Eradication of H. pylori was assessed by histology, culture, and the 13C-urea breath test (13C-UBT) at least 6 weeks after cessation of antimicrobial therapy. Intention-to-treat eradication rates were 78.2% (95%CI 69%-87%) with OAC1w and 88.4% (95%CI 81%-96%) with OAC2w. Per-protocol eradication rates were 86.0% (95%CI 78%-94%) with OAC1w, 97.0% (95%CI 93%-100%) with OAC2w. There was no significant difference in the eradication rates between OAC1w and OAC2w. Side effects were mild and self-limiting in both groups. In conclusion, both 1- and 2-week triple therapy with OAC are well tolerated and provide good eradication rates in peptic ulcer patients in Japan. The eradication rate of the 2-week regimen was higher than that of the 1-week regimen, but the difference was not statistically significant. Further studies including long-term economic considerations are required to determine the optimal duration of treatment.
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Affiliation(s)
- K Kiyota
- Department of Gastroenterology, Saiseikai Noe Hospital, Osaka, Japan
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41
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Kim NJ, Sugano Y, Hirai M, Shoda M. Removal of a high load of ammonia gas by a marine bacterium, Vibrio alginolyticus. J Biosci Bioeng 2000; 90:410-5. [PMID: 16232881 DOI: 10.1016/s1389-1723(01)80010-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2000] [Accepted: 07/08/2000] [Indexed: 10/26/2022]
Abstract
A newly isolated marine bacterium, Vibrio alginolyticus was used to remove a high load of ammonia gas. By a stepwise increase in ammonia supply over the concentration range of 120-2000 ppm (v/v), complete removal of ammonia was observed from the start of the experiment in a suspended culture of the bacterium in basal medium containing 3% NaCl. When cells were inoculated onto an inorganic packing material in a biofilter, and a high load of ammonia was introduced continuously under nonsterile conditions, the average percentage of gas removed exceeded 85% for a 61-d operation. The maximum removal capacity and the complete removal capacity were 22.8 g-N/kg-dry packing material/d and 18.6 g-N/kg-dry packing material/d, respectively, which were about four times larger than those obtained in nitrifying sludge inoculated onto the same packing material. During this operation, the nonsterile air supply had no adverse effect on the removability of ammonia by V. alginolyticus.
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Affiliation(s)
- N J Kim
- Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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42
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Lee TH, Aoki H, Sugano Y, Shoda M. Effect of molasses on the production and activity of dye-decolorizing peroxidase from Geotrichum candidum Dec1. J Biosci Bioeng 2000; 89:545-9. [PMID: 16232795 DOI: 10.1016/s1389-1723(00)80054-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/1999] [Accepted: 03/03/2000] [Indexed: 11/23/2022]
Abstract
The production of dye-decolorizing peroxidase (DyP) was investigated by cultivating Geotrichum candidum Dec1 using molasses as a carbon source. Molasses at concentrations greater than 10 g.l(-1) was found to increase the decolorization activity of the culture broth toward dye, reactive blue 5 mainly because the amount of enzyme produced was enhanced. However, complete inhibition of DyP activity by molasses was observed at the concentration of 20 g.l(-1), indicating that the inhibitory effect of molasses on the culture broth activity to decolorize the dye was involved. When the culture broth was diluted 25 times, the dye-decolorizing activity was 7 times as much as that of non-diluted culture broth. The molasses fractions separated by gel chromatography (300-400 ml and 400-500 ml fractions) completely inhibited the purified DyP. On the basis of these results, we propose a scheme to control both positive and negative effects of molasses on the dye decolorization process.
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Affiliation(s)
- T H Lee
- Research Laboratory of Resources Utilization, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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Habu Y, Kiyota K, Inokuchi H, Sugano Y, Ko K, Waki S. [Evaluation of the efficacy and the cost-effectiveness of proton pump inhibitor-based dual and triple therapy regimens for H. pylori eradication in peptic ulcer disease]. Nihon Rinsho 1999; 57:135-9. [PMID: 10036950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
To evaluate the efficacy and the cost-effectiveness of H. pylori eradication for the treatment of peptic ulcer disease, a randomized controlled trial to compare the efficacy of proton pump inhibitor-based dual and triple regimens was conducted. A decision analysis was also performed to assess H. pylori eradication compared to the conventional maintenance strategy. Two hundred and thirty-four peptic ulcer patients suffering from H. pylori infection were randomly treated with either omeprazole 20 mg bid + amoxicillin 500 mg qid + clarithromycin 400 mg bid (OAC) or with omeprazole 20 mg bid + clarithromycin 400 mg bid (OC) for 14 days. The eradication rate with OAC was 87.6% (92/105) (95% Confidence Interval (CI): 81-94%), which was significantly higher than that with OC (61.9% (60/97) (95% CI: 52-72%)) (p < 0.001, chi 2 test). Both regimens were safe and well tolerated. H. pylori eradication was more effective and less costly than conventional strategy in a long term perspective. OAC was more cost-effective than OC. In conclusion, H. pylori eradication is a cost-effective alternative to conventional treatment. We recommend 2 weeks triple regimen with omeprazole 20 mg bid + amoxicillin 500 mg qid + clarithromycin 400 mg bid (OAC) as a first-line treatment in all patients with peptic ulcers associated with H. pylori infection.
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Affiliation(s)
- Y Habu
- Department of Gastroenterology, Saiseikai Noe Hospital, Osaka
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Ding YS, Gatley SJ, Fowler JS, Chen R, Volkow ND, Logan J, Shea CE, Sugano Y, Koomen J. Mapping catechol-O-methyltransferase in vivo: initial studies with [18F]Ro41-0960. Life Sci 1998; 58:195-208. [PMID: 9499160 DOI: 10.1016/0024-3205(95)02277-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Ro41-0960 is a potent, fluorine containing COMT inhibitor which has be en reported to cross the blood brain barrier and to inhibit COMT in the brain. It is structurally similar to Ro40-7592 which is currently undergoing clinical trials in Parkinson's disease. Positron emission tomographic (PET) studies in baboon using F-18 labeled Ro41-0960 demonstrated a negligible uptake in the brain both at tracer doses and with the addition of unlabeled drug (1.5 mg/kg) at all times through a 90 min experimental interval. The brain to plasma ratios of F-18 averaged about 0.025. Region of interest analysis of the brain tissue area suggests that most of F-18 in the brain was due to the blood in the brain and not the brain tissue itself. However, high uptake was observed in the kidneys and in other organs which are known to have high COMT activity. Studies in mice showed that at 30 min after injection of tracer, F-18 in kidneys was largely as unchanged [18F]Ro41-0960 and that it could be displaced with unlabeled Ro41-0960. The fact that the average brain to blood ratio for mice (n=12) was 0.04, and that similar HPLC metabolite patterns were observed for brain and blood, provides consistent evidence that nearly all the F-18 in the brain represents F-18 in the cerebral blood vessels. These studies raise the question of whether the central pharmacological effects of Ro41-0960 are due to its presence in the brain. They also provide the first example of a positron emitter labeled radiotracer for COMT, and provide initial encouraging evidence that [18F]Ro41-0960 may be used to examine COMT in peripheral organs in vivo.
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Affiliation(s)
- Y S Ding
- Chemistry Dept., Brookhaven National Laboratory, Upton, NY, USA.
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Yasuoka H, Sugano Y, Oka T, Watanabe C, Kaneko Y, Nojima T, Matsumura M, Fujii T, Mimori T. [Antigenic epitopes recognized by autoantibodies to calpastatin in patients with rheumatoid arthritis and their clinical significance]. Ryumachi 1997; 37:458-66. [PMID: 9256029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We have previously described that novel autoantibodies to calpastatin (endogenous inhibitor for calcium-dependent neutral protease, calpain) were detected in patients with rheumatoid arthritis (RA) and other disorders. Since calpain is thought to mediate inflammatory process and cartilage destruction, autoantibodies to its inhibitor protein, calpastatin, may be involved in the pathogenic mechanism of rheumatoid arthritis. In the present study, we analyzed antigenic epitopes reactive with autoantibodies to calpastatin and their clinical correlation. cDNA encoding the C-terminal 178 amino acids of human calpastatin (RA-6) was digested by restriction enzymes and ligated in to pEX expression vectors. These recombinant plasmids were tranfected into E. coli POP2136 and screened by colony blots using RA sera containing anticalpastatin antibodies and a mouse monoclonal antibody. RA patient sera recognized the C-terminus of domain IV (epitope C1 ; aa. 647-673) and C-terminus of domain III (epitope C2 ; aa. 496-571), whereas the mouse monoclonal antibody recognized an entirely different region containing the calpain-binding site (epitope B2 ; aa. 572-625). To evaluate epitope reactivity of patient autoantibodies, 15 RA sera containing anti-calpastatin were reacted with epitope fusion proteins. In immunoblotting, most RA sera recognized either C1 or C2 epitopes (67% and 40%, respectively), and only one patient recognized both epitopes. B2 epitope a more progressed and sever state of arthritis than those not reacting with C1. These results suggests that anti-calpastatin antibodies may play a role in the pathogenic mechanisms of RA and their epitope reactivity may be important for disease progression.
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Affiliation(s)
- H Yasuoka
- Department of Internal Medicine, Keio University School of Medicine, Tokyo
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Suzuki K, Tagawa S, Koh K, Hino M, Yamane T, Wakasa K, Sasaki M, Mizuki M, Azenishi Y, Tanaka H, Machii T, Aozasa K, Ohsawa M, Sugano Y, Hara J, Kawa K, Tatsumi N. [LGL lymphoma]. Rinsho Byori 1996; 44:927-935. [PMID: 8937182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We reported in this article two patients with large granular lymphocytic lymphoma (abbreviated as LGL lymphoma). One was the patient with LGL leukemia/lymphoma (patient 1) and other was the patient with NK-LGL lymphoma (patient 2). Because the gene of TCR delta was rearranged in the patient 1, the clonality of the LGL leukemia/lymphoma was confirmed. However, it is not determined yet whether the lineage of tumor cells is T cells or NK cells. The cytochemical features of the lymphoma cells of the patient 2 were studied. It was found that NK cell-derived lymphoma cells of the patient were positively stained with these two monoclonal antibodies that are reactive with T cell; one is anti-CD45RO (UCHL-1) and other is anti-CD3. Judging from the result, malignant NK-LGL cells in some patients are cytoplasmic CD3+ and UCHl-1+. It is emphasized that May-Grünwald-Giemsa stain of biopsied specimen of the lymphoma is required for making the diagnosis of LGL lymphoma.
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Affiliation(s)
- K Suzuki
- Department of Clinical Hematology, Osaka University Medical School
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Ding YS, Fowler JS, Volkow ND, Logan J, Gatley SJ, Sugano Y. Carbon-11-d-threo-methylphenidate binding to dopamine transporter in baboon brain. J Nucl Med 1995; 36:2298-305. [PMID: 8523123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
UNLABELLED The more active d-enantiomer of methylphenidate (dl-threo-methyl-2-phenyl-2-(2-piperidyl)acetate, Ritalin) was labeled with 11C(t1/2:20.4 min) to characterize its binding, examine its specificity for the dopamine transporter and evaluate it as a radio-tracer for the presynaptic dopaminergic neuron. METHODS PET studies were carried out in the baboon. The pharmacokinetics of [11C]dl-threo-methylphenidate, [11C]l-threo-MP and with its racemate ([11C]dl-threo-methylphenidate, [11C]MP). Nonradioactive methylphenidate was used to assess the reversibility and saturability of the binding. GBR 12909, 3 beta-(4-iodophenyl)tropane-2-carboxylic acid methyl ester (beta-CIT), tomoxetine and citalopram were used to assess the binding specificity. RESULTS The ratio between radioactivity in the striatum and that in the cerebellum (ST/CB) after injection of [11C]d-threo-MP was higher than that for [11C]MP and [11C]l-threo-MP (3.3 for d-, 2.2 for racemic and 1.1 for l- in the same baboon). Most of the striatal binding of [11C]d-threo-MP was displaceable by injection of nonradioactive MP. Pretreatment with nonradioactive MP (0.5 mg/kg), GBR12909 (1.5 mg/kg) and RTI-55 (0.3 mg/kg) markedly reduced striatal but not cerebellar uptake of [11C]d-threo-MP. In all cases, the ST/CB after pretreatment was reduced by about 60% compared to 43% for [11C]MP. The ratios of distribution volumes at steady-state for the ST/CB for the three separate studies in the same baboon were reduced by about 50%, as compared with 37% for [11C]MP. In contrast, pretreatment with tomoxetine (3.0 mg/kg) or citalopram (2.0 mg/kg) did not change [11C]d-threo-MP kinetics; the ST/CB after pretreatment was similar to that for the control. CONCLUSION These results demonstrate the saturable, reversible and specific binding of [11C]d-threo-MP to the dopamine transporter on the baboon brain, suggesting that [11C]d-threo-MP will be a useful PET tracer for the presynaptic dopaminergic neuron in living human brain.
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Affiliation(s)
- Y S Ding
- Department of Chemistry, Brookhaven National Laboratory, Upton, NY 11973, USA
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Gatley SJ, Ding YS, Volkow ND, Chen R, Sugano Y, Fowler JS. Binding of d-threo-[11C]methylphenidate to the dopamine transporter in vivo: insensitivity to synaptic dopamine. Eur J Pharmacol 1995; 281:141-9. [PMID: 7589201 DOI: 10.1016/0014-2999(95)00233-b] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The regional distribution of [11C]d-threo-methylphenidate in mouse brain was very similar to that of [3H]WIN 35,428 ((-)-2 beta-carbomethoxy-3 beta-(4-fluorophenyl)tropane), and the two radioligands were displaced from striatum similarly after administration of the potent cocaine analog RTI-55 ((-)-2 beta-carbomethoxy-3 beta-(4-iodophenyl)tropane). However, while striatal [3H]WIN 35,428 increased between 5 and 30 min, striatal [11C]d-threo-methylphenidate halved. Thus [11C]d-threo-methylphenidate binds similarly to but more reversibly than [3H]WIN 35,428. The methyl ester of L-DOPA (L-3,4-dihydroxyphenylalanine; 200 mg/kg) plus benserazide plus clorgyline, which markedly elevates rat striatal extracellular dopamine (Wachtel and Abercrombie, 1994, J. Neurochem. 63, 108), decreased the mouse striatum-to-cerebellum ratio for [11C]d-threo-methylphenidate at 30 min by 13% (P < 0.05). In positron emission tomographic (PET) baboon studies [11C]d-threo-methylphenidate binding was insensitive to drugs expected to lower endogenous dopamine. These experiments suggest that normal synaptic dopamine does not compete for binding with [11C]d-threo-methylphenidate, and will not affect PET measures of dopamine transporter availability.
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Affiliation(s)
- S J Gatley
- Medical Department, Brookhaven National Laboratory Upton, NY 11973, USA
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Abstract
The conditioned place preference paradigm is commonly used to study the reinforcing properties of various drugs. In the present study, the effect of adrenalectomy (ADX) on the morphine-induced place preference was examined in rats. Morphine produced a significant preference for the drug-associated place in sham-operated (sham) and ADX rats. In sham rats, only the highest dose of morphine (8 mg/kg, i.p.) produced a significant preference, while in ADX rats, lower doses of morphine (1 and 2 mg/kg, i.p.) produced a significant preference for the drug-associated place. Furthermore, the morphine-induced place preference was blocked by the dopamine D1 antagonist SCH23390 in both sham and ADX rats. On the other hand, the cocaine-induced place preference was not affected by ADX. In the present study, we found that ADX potentiates the reinforcing effect induced by morphine, but not that induced by cocaine, which suggests that the enhancement by ADX may be due to a change in opioid receptors, morphine metabolism and/or some other cause, but not a change in dopamine receptors.
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Affiliation(s)
- T Suzuki
- Department of Pharmacology, School of Pharmacy, Hoshi University, Tokyo, Japan
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