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Aoyagi K, Nishiwaki C, Nakamichi Y, Yamashita SI, Kanki T, Ohara-Imaizumi M. Imeglimin mitigates the accumulation of dysfunctional mitochondria to restore insulin secretion and suppress apoptosis of pancreatic β-cells from db/db mice. Sci Rep 2024; 14:6178. [PMID: 38485716 PMCID: PMC10940628 DOI: 10.1038/s41598-024-56769-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 03/11/2024] [Indexed: 03/18/2024] Open
Abstract
Mitochondrial dysfunction in pancreatic β-cells leads to impaired glucose-stimulated insulin secretion (GSIS) and type 2 diabetes (T2D), highlighting the importance of autophagic elimination of dysfunctional mitochondria (mitophagy) in mitochondrial quality control (mQC). Imeglimin, a new oral anti-diabetic drug that improves hyperglycemia and GSIS, may enhance mitochondrial activity. However, chronic imeglimin treatment's effects on mQC in diabetic β-cells are unknown. Here, we compared imeglimin, structurally similar anti-diabetic drug metformin, and insulin for their effects on clearance of dysfunctional mitochondria through mitophagy in pancreatic β-cells from diabetic model db/db mice and mitophagy reporter (CMMR) mice. Pancreatic islets from db/db mice showed aberrant accumulation of dysfunctional mitochondria and excessive production of reactive oxygen species (ROS) along with markedly elevated mitophagy, suggesting that the generation of dysfunctional mitochondria overwhelmed the mitophagic capacity in db/db β-cells. Treatment with imeglimin or insulin, but not metformin, reduced ROS production and the numbers of dysfunctional mitochondria, and normalized mitophagic activity in db/db β-cells. Concomitantly, imeglimin and insulin, but not metformin, restored the secreted insulin level and reduced β-cell apoptosis in db/db mice. In conclusion, imeglimin mitigated accumulation of dysfunctional mitochondria through mitophagy in diabetic mice, and may contribute to preserving β-cell function and effective glycemic control in T2D.
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Affiliation(s)
- Kyota Aoyagi
- Department of Cellular Biochemistry, Kyorin University School of Medicine, Mitaka, Tokyo, 181-8611, Japan
| | - Chiyono Nishiwaki
- Department of Cellular Biochemistry, Kyorin University School of Medicine, Mitaka, Tokyo, 181-8611, Japan
| | - Yoko Nakamichi
- Department of Cellular Biochemistry, Kyorin University School of Medicine, Mitaka, Tokyo, 181-8611, Japan
| | - Shun-Ichi Yamashita
- Department of Cellular Physiology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, 951-8510, Japan
| | - Tomotake Kanki
- Department of Cellular Physiology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, 951-8510, Japan
| | - Mica Ohara-Imaizumi
- Department of Cellular Biochemistry, Kyorin University School of Medicine, Mitaka, Tokyo, 181-8611, Japan.
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Aoyagi K, Yamashita SI, Akimoto Y, Nishiwaki C, Nakamichi Y, Udagawa H, Abe M, Sakimura K, Kanki T, Ohara-Imaizumi M. A new beta cell-specific mitophagy reporter mouse shows that metabolic stress leads to accumulation of dysfunctional mitochondria despite increased mitophagy. Diabetologia 2023; 66:147-162. [PMID: 36181536 DOI: 10.1007/s00125-022-05800-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Accepted: 08/11/2022] [Indexed: 12/13/2022]
Abstract
AIMS/HYPOTHESIS Mitophagy, the selective autophagy of mitochondria, is essential for maintenance of mitochondrial function. Recent studies suggested that defective mitophagy in beta cells caused diabetes. However, because of technical difficulties, the development of a convenient and reliable method to evaluate mitophagy in beta cells in vivo is needed. The aim of this study was to establish beta cell-specific mitophagy reporter mice and elucidate the role of mitophagy in beta cell function under metabolically stressed conditions induced by a high-fat diet (HFD). METHODS Mitophagy was assessed using newly generated conditional mitochondrial matrix targeting mitophagy reporter (CMMR) mice, in which mitophagy can be visualised specifically in beta cells in vivo using a fluorescent probe sensitive to lysosomal pH and degradation. Metabolic stress was induced in mice by exposure to the HFD for 20 weeks. The accumulation of dysfunctional mitochondria was examined by staining for functional/total mitochondria and reactive oxygen species (ROS) using specific fluorescent dyes and antibodies. To investigate the molecular mechanism underlying mitophagy in beta cells, overexpression and knockdown experiments were performed. HFD-fed mice were examined to determine whether chronic insulin treatment for 6 weeks could ameliorate mitophagy, mitochondrial function and impaired insulin secretion. RESULTS Exposure to the HFD increased the number of enlarged (HFD-G) islets with markedly elevated mitophagy. Mechanistically, HFD feeding induced severe hypoxia in HFD-G islets, which upregulated mitophagy through the hypoxia-inducible factor 1-ɑ (Hif-1ɑ)/BCL2 interacting protein 3 (BNIP3) axis in beta cells. However, HFD-G islets unexpectedly showed the accumulation of dysfunctional mitochondria due to excessive ROS production, suggesting an insufficient capacity of mitophagy for the degradation of dysfunctional mitochondria. Chronic administration of insulin ameliorated hypoxia and reduced ROS production and dysfunctional mitochondria, leading to decreased mitophagy and restored insulin secretion. CONCLUSIONS/INTERPRETATION We demonstrated that CMMR mice enabled the evaluation of mitophagy in beta cells. Our results suggested that metabolic stress induced by the HFD caused the aberrant accumulation of dysfunctional mitochondria, which overwhelmed the mitophagic capacity and was associated with defective maintenance of mitochondrial function and impaired insulin secretion.
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Affiliation(s)
- Kyota Aoyagi
- Department of Cellular Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Shun-Ichi Yamashita
- Department of Cellular Physiology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Yoshihiro Akimoto
- Department of Microscopic Anatomy, Kyorin University School of Medicine, Tokyo, Japan
| | - Chiyono Nishiwaki
- Department of Cellular Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Yoko Nakamichi
- Department of Cellular Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Haruhide Udagawa
- Department of Cellular Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Manabu Abe
- Department of Animal Model Development, Brain Research Institute, Niigata University, Niigata, Japan
| | - Kenji Sakimura
- Department of Animal Model Development, Brain Research Institute, Niigata University, Niigata, Japan
| | - Tomotake Kanki
- Department of Cellular Physiology, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Mica Ohara-Imaizumi
- Department of Cellular Biochemistry, Kyorin University School of Medicine, Tokyo, Japan.
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Tsuji Y, Tamai M, Koga T, Morimoto S, Kawashiri SY, Nonaka F, Yamanashi H, Arima K, Aoyagi K, Maeda T, Matsuda F, Kawakami A. POS1441 INFLUENCE OF ENVIRONMENTAL AND GENETIC FACTORS ON SERUM IGG4 DURING HEALTH CHECKUPS IN NAGASAKI ISLAND STUDY. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.4164] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BackgroundAlthough serum IgG4 levels are important for the diagnosis of IgG4-related diseases (IgG4-RD), few studies have validated IgG4 levels in healthy individuals in large resident medical examination cohorts and investigated background factors associated with serum IgG4.A report on genetic factors shows that HLA loci associate with IgG4-RD found in Japanese nation-wide IgG4-RD registry1). However, environmental and genetic factors related to the elevated serum IgG4 levels, which may closely associate with development of IgG4-RD, have previously been unclear in healthy subjects. The nephelometric immunoassay (NIA) is conventionally used to measure IgG4, but it requires a relatively large amount of serum. The magnetic bead panel assay (MBA), which can evaluate IgG4 levels with only a few ml of serum, has an advantage compared with NIA regarding to required sample volume, but the correlation between the two methods is unclear.ObjectivesFirst, we attempted to verify the accuracy of the MBA compared to the standard NIA in the first cohort. Next, we examined the relationship between IgG4 measured by the MBA and background information of healthy subjects to identify variables that correlate with serum IgG4 in the second cohort.MethodsFirst, Kanazawa University collected 947 samples from the resident health examination, and IgG4 levels were measured by both MBA and NIA, and the correlation between the two was verified using Spearman’s rank correlation coefficient (first cohort). Next (second cohort), serum IgG4 of 3240 samples of Nagasaki Island Study (NaIS), which had started in 2014 collaborating among Nagasaki University and Goto City, Nagasaki Prefecture, intended for research of varying conditions and diseases including IgG4-RD, were then measured by MBA. These subjects were stratified into the two groups as IgG4-high and IgG4-within normal limit using the aforementioned cutoff values, and compared with background information such as age, gender, drinking, smoking, uric acid, serum creatinine, comorbidities and HLA typing, including DRB1*04:06, *04:03, *04:05, *04:10 as disease-susceptibility gene, DRB1*09:01 and DQB1*03:03 as protective gene1).ResultsIgG4 by MBA correlated well with IgG4 by NIA (r=0.94, p-value<0.001) which was determined from Kanazawa samples (N=947). 1,463.6 mg/mL of IgG4 of MBA corresponded to 135 mg/dl, the normal cut-off value for IgG4 by NIA. In the analysis of NaIS samples (N=3240), the overall high IgG4 positivity rate was 6.3%. Multivariable analysis including age, gender, smoking and drinking, led by univariate analysis, showed that gender and smoking were significantly associated with high serum IgG4 positivity (male: odds ratio = 1.8, 95%CI =1.2-2.7, p = 0.009, smoking: odds ratio = 1.7, 95%CI =1.1-2.5, p = 0.012). There was no association between high serum IgG4 level and HLA genotyping.ConclusionWe concluded that MBA is a good method to measure serum IgG4 even by the very small sample volume. In our study, the prevalence of serum IgG4 positivity was high tendency than previous report2). Our data showed that male and smoking are independent factors associated with high serum IgG4 positivity. There were no association between serum IgG4 level and HLA genotyping in healthy subjects. Further comprehensive investigation is necessary to clarify high risk subjects who will develop IgG4-RD.References[1]Terao C, et al. Lancet Rheumatol 2019;1: e14–22.[2]Carballo I, et al. PLoS One. 2016;11: e0149330.Disclosure of InterestsNone declared
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Aoyagi K, Liew JW, Farrar JT, Wang N, Carlesso L, Kumar D, Frey Law L, Lewis CE, Nevitt M, Neogi T. Does weight-bearing versus non-weight-bearing pain reflect different pain mechanisms in knee osteoarthritis?: the Multicenter Osteoarthritis Study (MOST). Osteoarthritis Cartilage 2022; 30:545-550. [PMID: 34801670 PMCID: PMC8940656 DOI: 10.1016/j.joca.2021.10.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 10/05/2021] [Accepted: 10/19/2021] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Knee osteoarthritis (OA) is predominantly characterized by pain with weight-bearing activities. Pain at rest also occurs but the mechanisms for this are not clear. We evaluated the relations of nociceptive signal alterations to weight-bearing and non-weight-bearing pain in knee OA. DESIGN We used data from a NIH-funded longitudinal cohort of older adults with or at risk of knee OA. We evaluated quantitative sensory testing (QST) measures (pressure pain threshold (PPT) at patellae and the wrist; mechanical temporal summation (TS); conditioned pain modulation (CPM)). Each WOMAC pain question was dichotomized as having at least moderate pain, and we further categorized them as weight-bearing pain and non-weight-bearing pain. We evaluated the relation of QST measures to each pain outcome using logistic regression, adjusting for potential confounders. RESULTS 2,749 participants (5,479 knees) were included (mean age 64 ± 11, 57% female). Each SD unit decrease in patellar PPT was associated with greater odds of both weight-bearing pain (OR 1.51 (95% CI 1.27, 1.79)) and non-weight-bearing pain (OR 1.46 (1.20-1.77)), while wrist PPT was associated with greater odds of weight-bearing pain (OR 1.27 (1.15, 1.39)) but only with pain during sitting/lying (OR 1.20 (1.01, 1.43)). TS was significantly associated with greater odds of pain with walking and stairs (OR 1.11 (1.01, 1.23), 1.11 (1.03, 1.20), respectively). CPM was not associated with any pain outcomes. CONCLUSIONS Our findings challenge the hypothesis that non-weight-bearing pain may reflect greater pain sensitization and/or inefficient CPM than weight-bearing pain in knee OA, suggesting other mechanisms are likely responsible.
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Affiliation(s)
- K Aoyagi
- Boston University School of Medicine, Boston, MA, USA.
| | - J W Liew
- Boston University School of Medicine, Boston, MA, USA.
| | - J T Farrar
- University of Pennsylvania School of Medicine, Philadelphia, PA, USA.
| | - N Wang
- Boston University School of Public Health, Boston, MA, USA.
| | | | - D Kumar
- Boston University School of Medicine, Boston, MA, USA.
| | | | - C E Lewis
- University of Alabama, Birmingham, AL, USA.
| | - M Nevitt
- University of California San Francisco, San Francisco, CA, USA.
| | - T Neogi
- Boston University School of Medicine, Boston, MA, USA.
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Tsuji Y, Tamai M, Morimoto S, Sasaki D, Kawashiri SY, Yanagihara K, Aoyagi K, Maeda T, Matsuda F, Kawakami A, Saito T. POS1429 ORAL DYSBIOSIS REFLECTS THE IMMUNOLOGICAL ALTERATION OF RA REGARDING TO HLA DRB1*SE, ACPA AND CIGARETTE SMOKING: NAGASAKI ISLAND STUDY. Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.2270] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:Anti-citrullinated protein antibody (ACPA) production is observed in several organs even prior to the onset of rheumatoid arthritis (RA), and oral mucosa is considered to be one of the important tissues. Saliva is considered to reflect the oral microbiota(oralMB) including periodontal disease. A gene-environment interaction between cigarette smoking and shared epitope genes in HLA-DRB1*shared epitope (SE) provides a high risk of ACPA-positive RA. However, the interaction of HLA-DRB1*SE, ACPA, cigarette smoking and oralMB of RA patients remains to be elucidated.Objectives:We investigated that the difference of oralMB among RA patients and healthy subjects(HS) regarding to ACPA, HLA-DRB1*SE and cigarette smoking.Methods:The Nagasaki Island Study, which had started in 2014 collaborating with Goto City, Nagasaki Prefecture, Japan, is intended for research of the preclinical stage of RA, including ACPA, HLA genotype screening, oralMB and lifestyle habit. Both of blood and salivary samples were obtained from 1422 subjects out of 4276 participants in this study from 2016 to 2018. ACPA positivity was 1.7 % in total 4276 subjects. At this point, we selected 291 subjects, who were ACPA positive non-RA HS(n=22) and patients with RA (n=33, 11 subjects were ACPA positive and 22 ACPA negative, respectively) as the case, age and gender matched ACPA negative non-RA HS (n=236) as the control. In RA subjects, current smoker was n=1(3.0%) and ever smoker was n=8(24.2%). In HS, current smoker was n=29(11.2%) and ever smoker was n=55(21.3%). ACPA was measured by ELISA, and HLA genotyping was quantified by next-generation sequencing (Ref.1). The operational taxonomic unit (OTU) analysis using 16S rRNA gene sequencing were performed. The richness of microbial diversity within subject (α-diversity) was scaled via Shannon entropy. The dissimilarity between microbial community composition was calculated using Bray-Curtis distance as a scale, and differences between groups (β-diversity) were tested by permutational multivariate analysis of variance (PERMANOVA). In addition, UniFrac distance calculated in consideration of the distance on the phylogenetic tree were performed.Results:Median age 71 y.o., % Female 58.4 %. Among RA and non-RA subjects, not α-diversity but β-diversity was statistically smaller significantly in RA (p=0.022). In the HS, there was no decrease in α-diversity between the ACPA-positive and HLA-DRB1*SE-positive groups, but in the ACPA-positive group, there was a decrease in α-diversity in the HLA-DRB1*SE-positive group. When we compared α-diversity stratified by the presence or absence of three factors (RA, ACPA, and HLA-DRB1*SE), the RA group with ACPA and HLA-DRB1*SE positive tended to have the lowest diversity (Figure 1 lower right). RA subjects, presence of HLA-DRB1*SE did not show the difference but the tendency of lower α-diversity (p=0.29).Conclusion:HS with ACPA-positive HLA-DRB1*SE tended to show lower α-diversity than ACPA-positive HS and HLA-DRB1*SE positive HS. Furthermore, RA subjects with ACPA-positive HLA-DRB1*SE showed lower α-diversity than HS with ACPA-positive HLA-DRB1*SE.Our study suggested that the oral dysbiosis may reflect the immunological status of patients with RA. Because of the small number of ACPA-positive patients, stratification by smoking history was difficult. Further examination is needed to clarify the gene-environment interaction and microbiome.References:[1]Kawaguchi S, et al. Methods Mol Biol 2018;1802: 22.Disclosure of Interests:None declared
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Abstract
Background Insulin is stored within large dense-core granules in pancreatic beta (β)-cells and is released by Ca2+-triggered exocytosis with increasing blood glucose levels. Polarized and targeted secretion of insulin from β-cells in pancreatic islets into the vasculature has been proposed; however, the mechanisms related to cellular and molecular localization remain largely unknown. Within nerve terminals, the Ca2+-dependent release of a polarized transmitter is limited to the active zone, a highly specialized area of the presynaptic membrane. Several active zone-specific proteins have been characterized; among them, the CAST/ELKS protein family members have the ability to form large protein complexes with other active zone proteins to control the structure and function of the active zone for tight regulation of neurotransmitter release. Notably, ELKS but not CAST is also expressed in β-cells, implying that ELKS may be involved in polarized insulin secretion from β-cells. Scope of review This review provides an overview of the current findings regarding the role(s) of ELKS and other active zone proteins in β-cells and focuses on the molecular mechanism underlying ELKS regulation within polarized insulin secretion from islets. Major conclusions ELKS localizes at the vascular-facing plasma membrane of β-cells in mouse pancreatic islets. ELKS forms a potent insulin secretion complex with L-type voltage-dependent Ca2+ channels on the vascular-facing plasma membrane of β-cells, enabling polarized Ca2+ influx and first-phase insulin secretion from islets. This model provides novel insights into the functional polarity observed during insulin secretion from β-cells within islets at the molecular level. This active zone-like region formed by ELKS at the vascular side of the plasma membrane is essential for coordinating physiological insulin secretion and may be disrupted in diabetes.
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Affiliation(s)
- Mica Ohara-Imaizumi
- Department of Cellular Biochemistry, Kyorin University School of Medicine, Tokyo 181-8611, Japan.
| | - Kyota Aoyagi
- Department of Cellular Biochemistry, Kyorin University School of Medicine, Tokyo 181-8611, Japan
| | - Toshihisa Ohtsuka
- Department of Biochemistry, Graduate School of Medicine, University of Yamanashi, Yamanashi 409-3898, Japan
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Tsuji Y, Tamai M, Morimoto S, Sasaki D, Nagayoshi M, Nonaka F, Kawashiri SY, Yanagihara K, Saito T, Aoyagi K, Maeda T, Matsuda F, Kawakami A. AB1232 ORAL DYSBIOSIS REFLECTS THE IMMUNOLOGICAL ALTERATION OF RA REGARDING TO ACPA AND HLA DRB1*SE: NAGASAKI ISLAND STUDY. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.5147] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Anti-citrullinated protein antibody (ACPA) production is observed in several organs even prior to the onset of rheumatoid arthritis (RA), and oral mucosa is considered to be one of the important tissues. The presence of HLA-DRB1*SE closely associates with ACPA production. Saliva is considered to reflect the oral microbiota including periodontal disease. Alteration of oral microbiota of RA becomes to be normalized by DMARDs treatment, however, the interaction of HLA-DRB1*SE, ACPA and oral microbiota of RA patients remains to be elucidated.Objectives:The Nagasaki Island Study, which had started in 2014 collaborating with Goto City, is intended for research of the preclinical stage of RA, including ACPA/HLA genotype screening and ultrasound and magnetic resonance imaging examinations in high-risk subjects. Using the samples accumulated in this cohort, we have tried to investigate the difference of oral microbiota among RA patients and healthy subjects regarding to ACPA and HLA-DRB1*SE.Methods:Blood and salivary samples were obtained from 1422 subjects out of 4276 who have participated in the Nagasaki Island Study from 2016 to 2018. ACPA positivity was 1.7 % in total. Some of RA patients resided in Goto City participated in the Nagasaki Island Study. At this point, we selected 291 subjects, who were ACPA positive non-RA healthy subjects (n=22) and patients with RA (n=33, 11 subjects were ACPA positive and 22 ACPA negative respectively) as the case, age and gender matched ACPA negative non-RA healthy subjects (n=236) as the control. ACPA was measured by an enzyme-linked immunosorbent assay, and HLA genotyping was quantified by next-generation sequencing (Ref.1). The operational taxonomic unit (OUT) analysis using 16S rRNA gene sequencing were performed. The richness of microbial diversity within-subject (alpha diversity) was scaled via Shannon entropy. The dissimilarity between microbial community composition was calculated using Bray-Curtis distance as a scale, and differences between groups (beta diversity) were tested by permutational multivariate analysis of variance (PERMANOVA). In addition, UniFrac distance calculated in consideration of the distance on the phylogenetic tree were performed.Results:Median age 70 y.o., % Female 58.8 %. Among RA and non-RA subjects, not alpha diversity but beta diversity was statistically significance (p=0.022, small in RA). In RA subjects, both alpha and beta diversity is small (p<0.0001), especially significant in ACPA positive RA (Figure 1). Amongt RA subjects, presence of HLA-DRB1*SE did not show the difference but the tendency of being small of alpha diversity (p=0.29).Conclusion:Our study has suggested for the first time the association of oral microbiota alteration with the presence of ACPA and HLA-DRB1*SE. Oral dysbiosis may reflect the immunological status of patients with RA.References:[1]Kawaguchi S, et al. Methods Mol Biol 2018;1802: 22Disclosure of Interests:None declared
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Arima K, Tamai M, Nonaka F, Iwamoto N, Mizukami S, Nishimura T, Abe Y, Origuchi T, Aoyagi K. SAT0458 THE POLYMORPHISM ON FAT MASS AND OBESITY ASSOCIATED GENE (FTO) WAS ASSOCIATED WITH LOW BONE MASS IN JAPANESE COMMUNITY DWELLING POPULATION. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.4050] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:A polymorphism onFTO(OMIM 610966) was reported as a causal variant for obesity, plays a critical rule not only in amount of adipose tissue but also in function of mitochondrial thermogenesis1.Objectives:To examine the association of the genotype on a single nucleotide polymorphism onFTOwith bone health.Methods:FTO rs1421085 polymorphism was genotyped in 1,601 community-dwelling Japanese participants. This cross-sectional study was nested in Nagasaki Islands Study, which is a prospective cohort in Goto City, in islands of Japan. Participants were recruited at medical check-ups for community dwelling population.Bone mass of the calcaneus was evaluated with stiffness index calculated using a quantitative ultrasound measurement. Low bone mass was defined as a stiffness index less than 80 % of the young adult mean.Sera and peripheral blood mononuclear cells were obtained. The SNP of rs1421085 was genotyped using hydrolysis probe. The chi-squared test was used to determine whether the variants were in equilibrium in that population. Trend for the median of BMI among genotypes was assessed using the Jonckheere-Terpstra test. Potential associations between FTO polymorphism and overweight and between the polymorphism and low bone mass were evaluated using logistic regression. All analyses were carried out using SPSS 23.Results:Genotype and allele frequencies for the polymorphism were in Hardy-Weinberg equilibrium (minor allele frequency 0.16, p = 0.40) in 1,601 community-dwelling persons (mean age was 68.5 years in men and 68.1 years in women).There were significant associations between the minor allele and higher median of BMI on dose dependent manner in men (p = 0.04 for trend in men and p = 0.10 for trend in women, respectively), and between the minor allele and overweight (>25 in BMI, OR 1.52, 95%CI 1.07 2.14, p=0.02 in men, OR 1.48, 95%CI 1.16 1.95, p=0.01 in women).Logistic regression analysis showed a significant protective association in men with carriers of minor allele against low bone mass after an adjustment for age and BMI (OR 0.63, 95%CI 0.44 0.90, p=0.01 in men, not significant in women).Conclusion:Our study indicated significant associations of the polymorphism onFTOwith BMI and bone mass among community dwelling men. The polymorphism may play a rule in a part of bone health with higher BMI and other beneficial functions.References:[1]N Engl J Med. 2015; 373: 895-907Disclosure of Interests:None declared
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Ohno Y, Aoyagi K, Yui M, Takenaka D, Yoshikawa T. OA10.05 Which Is Better for TNM Stage Assessment Among Whole-Body MRI and PET/MRI at 1.5 Tesla and 3 Tesla and FDG-PET/CT in Non-Small Cell Lung Cancer? J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Aoyagi K, Itakura M, Fukutomi T, Nishiwaki C, Nakamichi Y, Torii S, Makiyama T, Harada A, Ohara-Imaizumi M. VAMP7 Regulates Autophagosome Formation by Supporting Atg9a Functions in Pancreatic β-Cells From Male Mice. Endocrinology 2018; 159:3674-3688. [PMID: 30215699 DOI: 10.1210/en.2018-00447] [Citation(s) in RCA: 14] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 09/05/2018] [Indexed: 12/24/2022]
Abstract
Dysfunctional mitochondria are observed in β-cells of diabetic patients, which are eventually removed by autophagy. Vesicle-associated membrane protein (VAMP)7, a vesicular SNARE protein, regulates autophagosome formation to maintain mitochondrial homeostasis and control insulin secretion in pancreatic β-cells. However, its molecular mechanism is largely unknown. In this study, we investigated the molecular mechanism of VAMP7-dependent autophagosome formation using VAMP7-deficient β-cells and β-cell-derived Min6 cells. VAMP7 localized in autophagy-related (Atg)9a-resident vesicles of recycling endosomes (REs), which contributed to autophagosome formation, and it interacted with Hrb, Syntaxin16, and SNAP-47. Hrb recruited VAMP7 and Atg9a from the plasma membrane to REs. Syntaxin16 and SNAP-47 mediated autophagosome formation at a step later than the proper localization of VAMP7 to Atg9a-resident vesicles. Knockdown of Hrb, Syntaxin16, and SNAP-47 resulted in defective autophagosome formation, accumulation of dysfunctional mitochondria, and impairment of glucose-stimulated insulin secretion. Our data indicate that VAMP7 and Atg9a are initially recruited to REs to organize VAMP7 and Atg9a-resident vesicles in an Hrb-dependent manner. Additionally, VAMP7 forms a SNARE complex with Syntaxin16 and SNAP-47, which may cause fusions of Atg9a-resident vesicles during autophagosome formation. Thus, VAMP7 participates in autophagosome formation by supporting Atg9a functions that contribute to maintenance of mitochondrial quality.
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Affiliation(s)
- Kyota Aoyagi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Makoto Itakura
- Department of Biochemistry, Kitasato University School of Medicine, Kanagawa, Japan
| | - Toshiyuki Fukutomi
- Department of Pharmacology, Kyorin University School of Medicine, Tokyo, Japan
| | - Chiyono Nishiwaki
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Yoko Nakamichi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Seiji Torii
- Biosignal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, Gunma, Japan
| | - Tomohiko Makiyama
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Mica Ohara-Imaizumi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
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Aoyagi K. [Functional roles of VAMP family proteins in pancreatic β-cells]. Seikagaku 2017; 89:247-250. [PMID: 29624990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
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Kunii M, Ohara-Imaizumi M, Takahashi N, Kobayashi M, Kawakami R, Kondoh Y, Shimizu T, Simizu S, Lin B, Nunomura K, Aoyagi K, Ohno M, Ohmuraya M, Sato T, Yoshimura SI, Sato K, Harada R, Kim YJ, Osada H, Nemoto T, Kasai H, Kitamura T, Nagamatsu S, Harada A. Opposing roles for SNAP23 in secretion in exocrine and endocrine pancreatic cells. J Cell Biol 2016; 215:121-138. [PMID: 27697926 PMCID: PMC5057288 DOI: 10.1083/jcb.201604030] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 08/26/2016] [Indexed: 12/17/2022] Open
Abstract
Kunii et al. reveal that the SNARE protein SNAP23 plays distinct roles in the secretion of amylase in exocrine cells and of insulin in endocrine cells the pancreas and show that MF286, a novel inhibitor of SNAP23, may be a new drug candidate for diabetes. The membrane fusion of secretory granules with plasma membranes is crucial for the exocytosis of hormones and enzymes. Secretion disorders can cause various diseases such as diabetes or pancreatitis. Synaptosomal-associated protein 23 (SNAP23), a soluble N-ethyl-maleimide sensitive fusion protein attachment protein receptor (SNARE) molecule, is essential for secretory granule fusion in several cell lines. However, the in vivo functions of SNAP23 in endocrine and exocrine tissues remain unclear. In this study, we show opposing roles for SNAP23 in secretion in pancreatic exocrine and endocrine cells. The loss of SNAP23 in the exocrine and endocrine pancreas resulted in decreased and increased fusion of granules to the plasma membrane after stimulation, respectively. Furthermore, we identified a low molecular weight compound, MF286, that binds specifically to SNAP23 and promotes insulin secretion in mice. Our results demonstrate opposing roles for SNAP23 in the secretion mechanisms of the endocrine and exocrine pancreas and reveal that the SNAP23-binding compound MF286 may be a promising drug for diabetes treatment.
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Affiliation(s)
- Masataka Kunii
- Laboratory of Molecular Traffic, Department of Molecular and Cellular Biology, Institute for Molecular and Cellular Regulation, Gunma University, Gunma 371-8512, Japan Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Mica Ohara-Imaizumi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo 181-8611, Japan
| | - Noriko Takahashi
- Laboratory of Structural Physiology, Graduate School of Medicine, Center for Disease Biology and Integrative Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Masaki Kobayashi
- Metabolic Signal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, Gunma 371-8512, Japan
| | - Ryosuke Kawakami
- Laboratory of Molecular and Cellular Biophysics, Research Institute for Electronic Science, Hokkaido University, Hokkaido 001-0020, Japan
| | - Yasumitsu Kondoh
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Saitama 351-0198, Japan
| | - Takeshi Shimizu
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Saitama 351-0198, Japan
| | - Siro Simizu
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Kanagawa 223-8522, Japan
| | - Bangzhong Lin
- Drug Discovery Team, Office for University-Industry Collaboration Planning and Promotion, Osaka University, Osaka 565-0871, Japan
| | - Kazuto Nunomura
- Drug Discovery Team, Office for University-Industry Collaboration Planning and Promotion, Osaka University, Osaka 565-0871, Japan
| | - Kyota Aoyagi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo 181-8611, Japan
| | - Mitsuyo Ohno
- Laboratory of Structural Physiology, Graduate School of Medicine, Center for Disease Biology and Integrative Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Masaki Ohmuraya
- Institute of Resource Development and Analysis, Kumamoto University, Kumamoto 860-0811, Japan
| | - Takashi Sato
- Laboratory of Molecular Traffic, Department of Molecular and Cellular Biology, Institute for Molecular and Cellular Regulation, Gunma University, Gunma 371-8512, Japan
| | - Shin-Ichiro Yoshimura
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
| | - Ken Sato
- Laboratory of Molecular Traffic, Department of Molecular and Cellular Biology, Institute for Molecular and Cellular Regulation, Gunma University, Gunma 371-8512, Japan
| | - Reiko Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan Department of Judo Therapy, Takarazuka University of Medical and Health Care, Hyogo 666-0152, Japan
| | - Yoon-Jeong Kim
- Drug Discovery Team, Office for University-Industry Collaboration Planning and Promotion, Osaka University, Osaka 565-0871, Japan
| | - Hiroyuki Osada
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science, Saitama 351-0198, Japan
| | - Tomomi Nemoto
- Laboratory of Molecular and Cellular Biophysics, Research Institute for Electronic Science, Hokkaido University, Hokkaido 001-0020, Japan
| | - Haruo Kasai
- Laboratory of Structural Physiology, Graduate School of Medicine, Center for Disease Biology and Integrative Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Tadahiro Kitamura
- Metabolic Signal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, Gunma 371-8512, Japan
| | - Shinya Nagamatsu
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo 181-8611, Japan
| | - Akihiro Harada
- Laboratory of Molecular Traffic, Department of Molecular and Cellular Biology, Institute for Molecular and Cellular Regulation, Gunma University, Gunma 371-8512, Japan Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka 565-0871, Japan
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Aoyagi K, Ohara-Imaizumi M, Itakura M, Torii S, Akimoto Y, Nishiwaki C, Nakamichi Y, Kishimoto T, Kawakami H, Harada A, Takahashi M, Nagamatsu S. VAMP7 Regulates Autophagy to Maintain Mitochondrial Homeostasis and to Control Insulin Secretion in Pancreatic β-Cells. Diabetes 2016; 65:1648-59. [PMID: 26953164 DOI: 10.2337/db15-1207] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 03/03/2016] [Indexed: 11/13/2022]
Abstract
VAMP7 is a SNARE protein that mediates specific membrane fusions in intracellular trafficking and was recently reported to regulate autophagosome formation. However, its function in pancreatic β-cells is largely unknown. To elucidate the physiological role of VAMP7 in β-cells, we generated pancreatic β-cell-specific VAMP7 knockout (Vamp7(flox/Y);Cre) mice. VAMP7 deletion impaired glucose-stimulated ATP production and insulin secretion, though VAMP7 was not localized to insulin granules. VAMP7-deficient β-cells showed defective autophagosome formation and reduced mitochondrial function. p62/SQSTM1, a marker protein for defective autophagy, was selectively accumulated on mitochondria in VAMP7-deficient β-cells. These findings suggest that accumulation of dysfunctional mitochondria that are degraded by autophagy caused impairment of glucose-stimulated ATP production and insulin secretion in Vamp7(flox/Y);Cre β-cells. Feeding a high-fat diet to Vamp7(flox/Y);Cre mice exacerbated mitochondrial dysfunction, further decreased ATP production and insulin secretion, and consequently induced glucose intolerance. Moreover, we found upregulated VAMP7 expression in wild-type mice fed a high-fat diet and in db/db mice, a model for diabetes. Thus our data indicate that VAMP7 regulates autophagy to maintain mitochondrial quality and insulin secretion in response to pathological stress in β-cells.
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Affiliation(s)
- Kyota Aoyagi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Mica Ohara-Imaizumi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Makoto Itakura
- Department of Biochemistry, Kitasato University School of Medicine, Kanagawa, Japan
| | - Seiji Torii
- Biosignal Research Center, Institute for Molecular and Cellular Regulation, Gunma University, Maebashi, Japan
| | - Yoshihiro Akimoto
- Department of Anatomy, Kyorin University School of Medicine, Tokyo, Japan
| | - Chiyono Nishiwaki
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Yoko Nakamichi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Takuma Kishimoto
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Hayato Kawakami
- Department of Anatomy, Kyorin University School of Medicine, Tokyo, Japan
| | - Akihiro Harada
- Department of Cell Biology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Masami Takahashi
- Department of Biochemistry, Kitasato University School of Medicine, Kanagawa, Japan
| | - Shinya Nagamatsu
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
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Tanaka Y, Aoyagi K, Minashi K, Komatsuzaki R, Komatsu M, Takahashi N, Oda I, Tachimori Y, Arao T, Nishio K, Kitano S, Muto M, Yamada Y, Sasaki H. 104 CDH2 negative esophageal squamous cell carcinoma with cytotoxic T-lymphocyte signatures is a good responder subtype to definitive chemoradiotherapy. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)30004-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Aoyagi K, Rossignol E, Hamdan FF, Mulcahy B, Xie L, Nagamatsu S, Rouleau GA, Zhen M, Michaud JL. A Gain-of-Function Mutation inNALCNin a Child with Intellectual Disability, Ataxia, and Arthrogryposis. Hum Mutat 2015; 36:753-7. [DOI: 10.1002/humu.22797] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 04/08/2015] [Indexed: 01/19/2023]
Affiliation(s)
- Kyota Aoyagi
- Department of Biochemistry; Kyorin University School of Medicine; Tokyo Japan
| | - Elsa Rossignol
- CHU Sainte-Justine Research Center; Montreal Canada
- Department of Neurosciences; University of Montreal; Montreal Canada
- Department of Pediatrics; University of Montreal; Montreal Canada
| | | | - Ben Mulcahy
- Lunenfeld-Tanenbaum Research Institute and Institute of Medical Science; Department of Molecular Genetics; University of Toronto; Ontario Canada
| | - Lin Xie
- Lunenfeld-Tanenbaum Research Institute and Institute of Medical Science; Department of Molecular Genetics; University of Toronto; Ontario Canada
| | - Shinya Nagamatsu
- Department of Biochemistry; Kyorin University School of Medicine; Tokyo Japan
| | - Guy A. Rouleau
- Montreal Neurological Institute; McGill University; Montreal Canada
| | - Mei Zhen
- Lunenfeld-Tanenbaum Research Institute and Institute of Medical Science; Department of Molecular Genetics; University of Toronto; Ontario Canada
| | - Jacques L. Michaud
- CHU Sainte-Justine Research Center; Montreal Canada
- Department of Neurosciences; University of Montreal; Montreal Canada
- Department of Pediatrics; University of Montreal; Montreal Canada
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Arima K, Nishimura T, Abe Y, Aoyagi K. THU0478 Longitudinal Associations Between Painful Knee Osteoarthritis and Difficulties in Physical Functioning Among Community-Dwelling Women: A 9 Years Follow-Up Study in Japan. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.5608] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Nakashima Y, Tamai M, Kita J, Tuji S, Fukui S, Umeda M, Nishino A, Suzuki T, Horai Y, Nishimura T, Koga T, Kawashiri S, Iwamoto N, Ichinose K, Hirai Y, Arima K, Yamasaki S, Nakamura H, Origuchi T, Uetani M, Aoyagi K, Eguchi K, Kawakami A. FRI0027 MRI-Proven Bone Marrow Oedema at Baseline is the Strongest Predictor Toward the Development of Rapid Radiographic Progression at 1 Year in Patients with Early-Stage Rheumatoid Arthritis: Results from Nagasaki University Early Arthritis Cohort. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.5778] [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: 11/04/2022]
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Tamai M, Arima K, Nakashima Y, Kita J, Umeda M, Fukui S, Nishino A, Suzuki T, Horai Y, Okada A, Koga T, Kawashiri SY, Iwamoto N, Ichinose K, Yamasaki S, Nakamura H, Origuchi T, Aoyagi K, Uetani M, Eguchi K, Kawakami A. FRI0048 MRI Bone Erosion at Baseline Predicts the Subsequent Radiographic Progression in Early-Stage RA Patients Who Achieved in Sustained Clinical Good Response: Sub-Analysis from Nagasaki University Early Arthritis Cohort. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.5527] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Koga T, Okada A, Kawakami A, Fukuda T, Hidaka T, Ishii T, Ueki Y, Kodera T, Nakashima M, Takahashi Y, Honda S, Watanabe R, Okuno H, Tamai M, Aoyagi K, Eguchi K. SAT0088 Prognostic Factors Toward Rapid Radiographic Progression in Patients with Rheumatoid Arthritis in Clinical Practice: A Japanese Multicenter, Prospective Longitudinal Cohort Study for Achieving Treat to Target Strategy. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.2201] [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: 11/04/2022]
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Aoyagi K, Narita M, Mori M, Tatibana M. Regulation of acetylglutamate in the liver: effect of glucocorticoid and renal failure. Contrib Nephrol 2015; 92:182-90. [PMID: 1756641 DOI: 10.1159/000420096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- K Aoyagi
- Department of Internal Medicine, University of Tsukuba, Japan
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Okada A, Kawakami A, Fukuda T, Hidaka T, Ishii T, Ueki Y, Kodera T, Nakashima M, Takahashi Y, Honda S, Horai Y, Koga T, Tamai M, Aoyagi K, Watanabe R, Okuno H, Eguchi K. AB0219 Evaluation of the Japanese Patients with Rheumatoid Arthritis (RA) of RAPID Radiographic Progression (RRP) Treated with Synthetic Disease Modifying Anti-Rheumatic Drugs (DMARDS) in Daily Practice: A Large-Scale Prospective Longitudinal Cohort Study. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.4035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Mizukami S, Abe Y, Tsujimoto R, Arima K, Kanagae M, Chiba G, Aoyagi K. Accuracy of spinal curvature assessed by a computer-assisted device and anthropometric indicators in discriminating vertebral fractures among individuals with back pain. Osteoporos Int 2014; 25:1727-34. [PMID: 24627138 DOI: 10.1007/s00198-014-2680-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 03/05/2014] [Indexed: 10/25/2022]
Abstract
UNLABELLED This study examined the accuracy of thoracic and lumbar kyphotic angles as well as anthropometric indicators for discriminating patients with vertebral fracture among Japanese women >50 years old with back pain. Along with region-specific kyphotic angles and anthropometric indicators, the combination of thoracic and lumbar kyphotic angles offered the highest accuracy. INTRODUCTION Vertebral fractures have been associated with thoracic kyphosis. However, reports on lumbar kyphotic changes in association with vertebral fracture are scarce. This study investigated the accuracy of thoracic kyphotic angle (TKA) and lumbar kyphotic angle (LKA) measurements as well as anthropometric indicators (wall-occiput distance (WOD) and rib-pelvis distance (RPD)) in discriminating patients with vertebral fracture. METHODS Lateral radiographs of the spine were obtained in 70 postmenopausal Japanese women who visited an orthopedic clinic with low back pain (mean age, 76.2 ± 9.0 years). Radiographic vertebral fracture was diagnosed using quantitative measurement according to Japanese criteria. Osteoarthritis (OA) was defined as Kellgren-Lawrence (KL) grade 3 or higher. TKA and LKA were measured using SpinalMouse®. WOD and RPD were also measured. RESULTS At least one vertebral fracture was present in 49 subjects (70 %). Women with vertebral fractures showed significant increases in LKA, TKA + LKA, and WOD and decreases in RPD. Logistic regression analysis showed significant association between TKA + LKA and vertebral fracture independent of the presence of OA. Receiver operating characteristic analysis revealed that TKA was useful for discriminating thoracic fractures (area under the curve (AUC), 0.730) and LKA was useful for lumbar fractures (AUC, 0.691). The combination of TKA + LKA offered the highest accuracy for detecting thoracic, lumbar, and any vertebral fractures, with AUCs of 0.779, 0.728, and 0.783, respectively. WOD and RPD showed low-to-moderate accuracies for thoracic, lumbar, and any vertebral fractures. CONCLUSIONS Assessment of spinal kyphosis by SpinalMouse® as well as anthropometric indicators proved useful in discriminating subjects with vertebral fractures. These convenient and radiation-free methods could contribute to early diagnosis of vertebral fractures and subsequent appropriate treatment, thus preventing additional osteoporotic fractures.
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Affiliation(s)
- S Mizukami
- Department of Public Health, Graduate School of Biomedical Sciences, Nagasaki University, 1-12-4 Sakamoto, Nagasaki, 852-8523, Japan
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Kawashiri SY, Nishino A, Suzuki T, Horai Y, Nakashima Y, Iwamoto N, Ichinose K, Arima K, Tamai M, Nakamura H, Origuchi T, Aoyagi K, Eguchi K, Kawakami A. AB1018 Articular Synovitis or Tenosynovitis - Which is More Involved toward Functional Disabilities in Patients with Rheumatoid Arthritis? Investigation of Wrist and Finger Joints by Ultrasound in Early-Stage Rheumatoid Arthritis. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.4082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kawashiri SY, Nishino A, Suzuki T, Nakashima Y, Horai Y, Iwamoto N, Ichinose K, Arima K, Tamai M, Nakamura H, Origuchi T, Uetani M, Aoyagi K, Eguchi K, Kawakami A. SAT0215 Ultrasound Disease Activity at 3 Months Predicts the Clinical Response at 6 Months of Patients with Rheumatoid Arthritis Treated by Biologic Disease Modifying Anti-Rheumatic Drugs. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.2574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kawashiri SY, Nishino A, Nakashima Y, Suzuki T, Horai Y, Nakashima M, Mizokami A, Matsuoka N, Iwamoto N, Ichinose K, Arima K, Tamai M, Nakamura H, Origuchi T, Aoyagi K, Kawakami A. AB0646 Low Reactive Hyperemia Index Assessed by Endopat and High Circulating Level of Placenta Growth Factor, Growth Differentiation Factor-15 and Pentraxin-3 Reflect the Presence of Vasculopathy as Well as Progressive Disease Status in Patients with Systemic Sc. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.4200] [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: 11/04/2022]
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Kawashiri SY, Suzuki T, Nakashima Y, Ueki Y, Aramaki T, Fujikawa K, Nakashima M, Okada A, Migita K, Mizokami A, Matsuoka N, Ichinose K, Nakamura H, Origuchi T, Aoyagi K, Kawakami A. SAT0252 Disease Activity at 3 Month Predicts the Clinical Response at 1 Year Treated by TOCILIZUMAB in Patients with Active Rheumatoid Arthritis: Results from Observational Investigation of Daily Clinical Practice. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.2670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Wang DN, Toyotome T, Muraosa Y, Watanabe A, Wuren T, Bunsupa S, Aoyagi K, Yamazaki M, Takino M, Kamei K. GliA in Aspergillus fumigatus is required for its tolerance to gliotoxin and affects the amount of extracellular and intracellular gliotoxin. Med Mycol 2014; 52:506-18. [DOI: 10.1093/mmy/myu007] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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Friedlein R, Fleurence A, Aoyagi K, de Jong MP, Van Bui H, Wiggers FB, Yoshimoto S, Koitaya T, Shimizu S, Noritake H, Mukai K, Yoshinobu J, Yamada-Takamura Y. Core level excitations—A fingerprint of structural and electronic properties of epitaxial silicene. J Chem Phys 2014; 140:184704. [DOI: 10.1063/1.4875075] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kawashiri S, Ueki Y, Migita K, Nakamura H, Aoyagi K, Kawakami A. Baseline low modified health assessment questionnaire (MHAQ) predicts the state of remission estimated by clinical disease activity index and MHAQ at 1 year in tocilizumab-treated rheumatoid arthritis patients. Clin Exp Rheumatol 2014; 32:445. [PMID: 24850342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2013] [Accepted: 01/09/2014] [Indexed: 06/03/2023]
Affiliation(s)
- S Kawashiri
- Department of Public Health, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
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Esaki M, Matsumoto T, Hizawa K, Aoyagi K, Mibu R, Iida M, Fujishima M. Intraoperative enteroscopy detects more lesions but is not predictive of postoperative recurrence in Crohn’s disease. Surg Endosc 2014; 15:455-9. [PMID: 11353960 DOI: 10.1007/s004640000174] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/1999] [Accepted: 12/16/1999] [Indexed: 01/01/2023]
Abstract
BACKGROUND The aim of this investigation was to elucidate the clinical value of intraoperative enteroscopy (IOE) for Crohn's disease, and to determine the value of IOE in predicting recurrent disease. METHODS In this study 27 patients requiring surgery were examined by both preoperative radiography and IOE. The findings obtained by these procedures in the remnant small intestine were compared. In 19 patients, the clinical course and colonoscopic or radiographic findings after surgery were analyzed. RESULTS Intestinal lesions were identified in 23 patients by IOE, and in 19 patients by radiography. Longitudinal ulcers were equivalently detected by IOE (63%) and radiography (56%), whereas small ulcers and inflammatory polyps were less frequently detected by radiography than by IOE (37% vs 74% and 19% vs 33%, respectively). Neither the presence nor the distribution of IOE findings was related to postoperative recurrence. CONCLUSIONS Whereas IOE demonstrates small intestinal lesions in detail, the procedure alone cannot predict postoperative recurrence in Crohn's disease.
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Affiliation(s)
- M Esaki
- Department of Internal Medicine II, Kyushu University Hospital, Maidashi 3-1-1, Fukuoka 812-8582, Japan.
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Kawashiri SY, Suzuki T, Nakashima Y, Horai Y, Okada A, Nishino A, Iwamoto N, Ichinose K, Arima K, Tamai M, Nakamura H, Origuchi T, Uetani M, Aoyagi K, Eguchi K, Kawakami A. Synovial inflammation assessed by ultrasonography correlates with MRI-proven osteitis in patients with rheumatoid arthritis. Rheumatology (Oxford) 2014; 53:1452-6. [DOI: 10.1093/rheumatology/keu034] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Ando K, Kudo Y, Aoyagi K, Ishikawa R, Igarashi M, Takahashi M. Calmodulin-dependent regulation of neurotransmitter release differs in subsets of neuronal cells. Brain Res 2013; 1535:1-13. [DOI: 10.1016/j.brainres.2013.08.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 07/25/2013] [Accepted: 08/08/2013] [Indexed: 02/05/2023]
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Uchiyama T, Arai E, Arai M, Higuchi Y, Yamamoto T, Yamanaka Y, Aoyagi K, Shina A, Shibata-Yamaguchi C, Fuse M, Tateno H, Kamai T, Yamanishi T, Yokosuka O, Saeki N, Sakakibara R, Hirata K, Kuwabara S. Subthalamic deep brain stimulation can improve gastric emptying in Parkinson's disease. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kawashiri SY, Suzuki T, Okada A, Tamai M, Nakamura H, Origuchi T, Uetani M, Aoyagi K, Kawakami A. FRI0093 Power doppler assessment of synovial vascularity predicts the presence of magnetic resonance imaging-proven osteitis in patients with rheumatoid arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kawashiri SY, Suzuki T, Nakashima Y, Horai Y, Okada A, Iwamoto N, Ichinose K, Tamai M, Arima K, Nakamura H, Origuchi T, Uetani M, Aoyagi K, Eguchi K, Kawakami A. SAT0524 Automated Breast Volume Scanner (ABVS), a New Automated Ultrasonic Device, is Useful to Examine Joint Injury in Patients with Rheumatoid Arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2248] [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: 11/04/2022]
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Tamai M, Nakashima Y, Suzuki T, Okada A, Kita J, Horai Y, Kawashiri SY, Iwamoto N, Ichinose K, Arima K, Yamasaki S, Nakamura H, Origuchi T, Uetani M, Aoyagi K, Eguchi K, Kawakami A. FRI0084 The presence of magnetic resonance imaging-proven osteitis at entry predicts the development of rapid radiographic progression in patients with early rheumatoid arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kawashiri SY, Nakashima Y, Horai Y, Suzuki T, Okada A, Iwamoto N, Ichinose K, Ogawa F, Ikeda S, Nakamura H, Origuchi T, Aoyagi K, Kawakami A. SAT0216 Low Reactive Hyperemia Index Assessed By Endo-Pat And High Serum Placenta Growth Factor Associate With Vasculopathy And Disease Progression In Patients With Systemic Sclerosis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kawashiri SY, Suzuki T, Nakashima Y, Horai Y, Okada A, Iwamoto N, Ichinose K, Arima K, Tamai M, Nakamura H, Origuchi T, Uetani M, Aoyagi K, Eguchi K, Kawakami A. SAT0489 The Severity of Synovial Inflammation Assessed by Musculoskeletal Ultrasonography Correlates with that of Osteitis Assessed by Magnetic Resonance Imaging in Patients with Rheumatoid Arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2213] [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: 11/04/2022]
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Kawashiri SY, Suzuki T, Okada A, Yamasaki S, Tamai M, Nakamura H, Origuchi T, Uetani M, Aoyagi K, Eguchi K, Kawakami A. AB0334 Musculoskeletal ultrasonography assists the diagnostic performance of the 2010 classification criteria for rheumatoid arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.334] [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: 11/04/2022]
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Tamai M, Nakashima Y, Suzuki T, Kita J, Okada A, Kawashiri SY, Iwamoto N, Ichinose K, Arima K, Nakamura H, Origuchi T, Uetani M, Aoyagi K, Eguchi K, Kawakami A. FRI0074 Stringent therapies improve both radiographic and clinical outcome in early-stage ra patients from japanese population: longitudinal study from nagasaki early arthritis cohort. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1201] [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: 11/04/2022]
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Malhotra R, Usyvat L, Raimann J, Thijssen S, Levin N, Kotanko P, Hilderman M, Qureshi AR, Al-Abed Y, Anderstam B, Bruchfeld A, Minco M, Argentino G, Grumetto L, Postiglione L, Memoli B, Riccio E, Striker G, Yubero-Serrano E, Uribarri J, Vlassara H, do Sameiro-Faria M, Ribeiro S, Kohlova M, Rocha-Pereira P, Fernandes J, Nascimento H, Reis F, Miranda V, Bronze-da-Rocha E, Quintanilha A, Costa E, Belo L, Santos-Silva A, Modilca M, Margineanu M, Gluhovschi G, Vernic C, Velciov S, Petrica L, Barzuca E, Gluhovschi C, Balgradean C, Kaycsa A, Stockler-Pinto M, Dornelles S, Cozzolino S, Malm O, Mafra D, Cobo G, Rodriguez I, Oliet A, Hinostroza J, Vigil A, Di Gioia M, Gallar P, Drechsler C, Wanner C, Blouin K, Pilz S, Tomaschitz A, Krane V, Marz W, Ritz E, van der Harst P, de Boer R, Carrero JJ, Cabezas-Rodriguez I, Zoccali C, Qureshi A, Ketteler M, Gorriz J, Rutkowski B, Teplan V, Kramar R, Pavlovic D, Goldsmith D, Benedik M, Fernandez-Martin J, Cannata-Andia J, Guido G, Loiacono E, Serriello I, Camilla R, Coppo R, Amore A, Schiller A, Munteanu M, Schiller O, Mihaescu A, Olariu N, Andrei C, Anton C, Ivacson Z, Roman V, Berca S, Bansal V, Marcelli D, Grassmann A, Bayh I, Scatizzi L, Marelli C, Etter M, Usvyat L, Kooman J, Sande F, Levin N, Kotanko P, Canaud B, Quiroga B, Villaverde M, Abad S, Vega A, Reque J, Yuste C, Barraca D, Perez de Jose A, Lopez-Gomez JM, Castellano Gasch S, Palomares I, Dominguez J, Ramos R, Schmidt J, Hafer C, Clajus C, Hadem J, Schmidt B, Haller H, Kielstein J, Katagiri M, Kamada Y, Kobayashi N, Moriguchi I, Ito Y, Kamekawa D, Akiyama A, Ishii H, Tanaka S, Kamiya K, Hamazaki N, Kato M, Shimizu R, Hotta K, Masuda T, Veronesi M, Mancini E, Valente F, Righetti F, Brunori G, Santoro A, Bal Z, Tutal E, Erkmen Uyar M, Guliyev O, Sayin B, Sezer S, Mikami S, Hamano T, Tanaka T, Iba O, Toki M, Mikami H, Takamitsu Y, Inoue T, Fujii M, Hirayama A, Ueda A, Watanabe R, Matsui H, Nagano Y, Nagase S, Aoyagi K, Owada S, Tutal E, Bal Z, Erkmen Uyar M, Sayin B, Tot U, Sezer S, Onec K, Erten Y, Pasaoglu O, Ebinc F, Uludag K, Okyay G, Inal S, Pasaoglu H, Deger S, Arinsoy T, Arias-Guillen M, Masso E, Perez E, Herrera P, Romano B, Perez N, Maduell F, Jung YS, Kim YN, Shin HS, Rim H, Al Ismaili Z, Hassan M, Dastoor H, Bernieh B, Ismael A, Marcelli D, Richards N, Khil M, Sheiman B, Dudar I, Gonchar Y, Khil V, Kim HL, Ryu HH, Kim SH, Bosch Benitez-Parodi E, Baamonde Laborda E, Perez Suarez G, Ramirez JI, Garcia Canton C, Guerra R, Ramirez Puga A, Toledo A, Lago Alonso MM, Checa Andres MD, Hwang WM, Yun SR, Molsted S, Andersen JL, Eidemak I, Harrison AP, Kose E, Turgutalp K, Kiykim A, Celik F, Gok Oguz E. Protein-energy wasting. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kitahara H, Ye Z, Aoyagi K, Ross PD, Abe Y, Honda S, Kanagae M, Mizukami S, Kusano Y, Tomita M, Shindo H, Osaki M. Associations of vertebral deformities and osteoarthritis with back pain among Japanese women: the Hizen-Oshima study. Osteoporos Int 2013; 24:907-15. [PMID: 22836277 PMCID: PMC3572384 DOI: 10.1007/s00198-012-2038-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Accepted: 04/30/2012] [Indexed: 01/02/2023]
Abstract
UNLABELLED We examined the spinal distribution of the types of vertebral deformities and the associations of vertebral deformities and osteoarthritis with back pain in Japanese women. Midthoracic and upper lumbar vertebrae were more susceptible to deformity. Vertebral deformity and osteoarthritis were frequent and were associated with back pain. INTRODUCTION Vertebral fractures due to osteoporosis and osteoarthritis are both common and significant health problems in aged people. However, little is known about the descriptive epidemiology of the individual deformity types and the relative clinical impact in women in Japan. METHODS Lateral radiographs were obtained from 584 Japanese women ages 40 to 89 years old. Deformities were defined as vertebral heights of more than 3 standard deviations (SDs) below the normal mean. Osteoarthritis was defined as Kellgren-Lawrence (KL) grade 2 or higher. Information on upper or low back pain during the previous month was collected by questionnaire. We compared the spinal distribution of the three types of vertebral deformities (wedge, endplate, and crush) typical of fractures and examined the associations of number and type of vertebral deformities and osteoarthritis with back pain. RESULTS Fifteen percent of women had at least one vertebral deformity and 74% had vertebral osteoarthritis. The prevalence of upper or low back pain was 30.1%. Deformities were most common in the midthoracic and upper lumbar regions and wedge was the frequent type, followed by endplate and crush. Multiple logistic regression analysis showed that the odds of back pain was 3.0 (95% CI 1.5-6.3) times higher for women with a single wedge deformity and 3.2 (95% CI 1.0--0.6) times higher for women with two or more wedge deformities, compared to women with no wedge deformity. Vertebral osteoarthritis was associated with back pain (OR 1.8, 95% CI 1.1-2.9), independent of other covariates including age and deformities. CONCLUSION Our results in this group of Japanese women are similar to and consistent with results reported previously in other populations of Japanese and Caucasians.
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Affiliation(s)
- H. Kitahara
- Department of Orthopaedic Surgery, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Z. Ye
- Department of Public Health, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - K. Aoyagi
- Department of Public Health, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | | | - Y. Abe
- Department of Public Health, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - S. Honda
- Department of Public Health, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - M. Kanagae
- Department of Public Health, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Department of Rehabilitation, Nishi-Isahaya Hospital, Isahaya, Japan
| | - S. Mizukami
- Department of Public Health, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Department of Rehabilitation, Nishi-Isahaya Hospital, Isahaya, Japan
| | - Y. Kusano
- Department of Community Development, Nagasaki Wesleyan University, Isahaya, Japan
| | - M. Tomita
- Department of Orthopaedic Surgery, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - H. Shindo
- Department of Orthopaedic Surgery, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - M. Osaki
- Department of Orthopaedic Surgery, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
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Aoyagi K, Ohara-Imaizumi M, Nishiwaki C, Nakamichi Y, Ueki K, Kadowaki T, Nagamatsu S. Acute inhibition of PI3K-PDK1-Akt pathway potentiates insulin secretion through upregulation of newcomer granule fusions in pancreatic β-cells. PLoS One 2012; 7:e47381. [PMID: 23077605 PMCID: PMC3471824 DOI: 10.1371/journal.pone.0047381] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Accepted: 09/12/2012] [Indexed: 02/03/2023] Open
Abstract
In glucose-induced insulin secretion from pancreatic β-cells, a population of insulin granules fuses with the plasma membrane without the typical docking process (newcomer granule fusions), however, its mechanism is unclear. In this study, we investigated the PI3K signaling pathways involved in the upregulation of newcomer granule fusions. Acute treatment with the class IA-selective PI3K inhibitors, PIK-75 and PI-103, enhanced the glucose-induced insulin secretion. Total internal reflection fluorescent microscopy revealed that the PI3K inhibitors increased the fusion events from newcomer granules. We developed a new system for transfection into pancreatic islets and demonstrated the usefulness of this system in order for evaluating the effect of transfected genes on the glucose-induced secretion in primary cultured pancreatic islets. Using this transfection system together with a series of constitutive active mutants, we showed that the PI3K-3-phosphoinositide dependent kinase-1 (PDK1)-Akt pathway mediated the potentiation of insulin secretion. The Akt inhibitor also enhanced the glucose-induced insulin secretion in parallel with the upregulation of newcomer granule fusions, probably via increased motility of intracellular insulin granules. These data suggest that the PI3K-PDK1-Akt pathway plays a significant role in newcomer granule fusions, probably through an alteration of the dynamics of the intracellular insulin granules.
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Affiliation(s)
- Kyota Aoyagi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Mica Ohara-Imaizumi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Chiyono Nishiwaki
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Yoko Nakamichi
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
| | - Kohjiro Ueki
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Takashi Kadowaki
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, University of Tokyo, Tokyo, Japan
| | - Shinya Nagamatsu
- Department of Biochemistry, Kyorin University School of Medicine, Tokyo, Japan
- * E-mail:
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Ishibashi H, Aoyagi K, Kobayashi H, Kurahara K, Kominato K, Kawasaki K, Oshiro Y, Fuchigami T. Endoscopic mucosal resection of inflammatory fibroid polyp in the transverse colon. Endoscopy 2012; 44 Suppl 2 UCTN:E15-6. [PMID: 22396254 DOI: 10.1055/s-0031-1291499] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [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: 12/10/2022]
Affiliation(s)
- H Ishibashi
- Institute of Gastroenterology, Matsuyama Red Cross Hospital, Matsuyama, Japan.
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Osaki M, Tatsuki K, Hashikawa T, Norimatsu T, Chiba K, Motokawa S, Furuichi I, Doiguchi Y, Aoyagi K, Shindo H. Beneficial effect of risedronate for preventing recurrent hip fracture in the elderly Japanese women. Osteoporos Int 2012; 23:695-703. [PMID: 21394496 PMCID: PMC3261386 DOI: 10.1007/s00198-011-1556-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [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] [Received: 06/12/2010] [Accepted: 01/13/2011] [Indexed: 12/26/2022]
Abstract
SUMMARY A 36-month observational study compared the incidence of unaffected side hip fracture in Japanese female osteoporosis patients with a history of hip fracture between 173 patients receiving risedronate and 356 risedronate-untreated controls. New hip fractures were significantly less frequent in the risedronate group, suggesting a preventive effect in high-risk patients. INTRODUCTION The purpose of this study was to investigate the preventive effect of risedronate on second hip fracture immediately following a first hip fracture in Japanese female osteoporosis patients with unilateral hip fracture. METHODS We conducted a prospective matched cohort study in 184 patients treated with risedronate and 445 patients not receiving risedronate after discharge from hospital. Both groups were followed-up for 36 months, and the incidence of unaffected side hip fracture and the frequency of adverse events were assessed. RESULTS Efficacy could be investigated in 173 patients from the risedronate group and 356 patients from the control group. Hip fracture was detected in 5 and 32 patients, respectively. Kaplan-Meier estimates of the 36-month fracture incidence were 4.3% in the risedronate group and 13.1% in the control group (P = 0.010, log-rank test). The hazard ratios (95% confidence intervals) obtained by univariate and multivariate analysis were 0.310 (0.121-0.796) and 0.218 (0.074-0.639), respectively, indicating a significantly lower incidence of unaffected side hip fracture in the risedronate group. Adverse events occurred in 38 patients (48 events) from the risedronate group and 94 patients (108 events) from the control group, with serious adverse events in 21 patients (26 events) and 78 patients (88 events), respectively. CONCLUSIONS No significant differences were observed between the two groups. The incidence of unaffected side hip fracture was significantly lower in the risedronate group. Accordingly, risedronate may have a preventive effect on hip fracture in high-risk Japanese female osteoporosis patients for fracture with a history of unilateral hip fracture.
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Affiliation(s)
- M Osaki
- Department of Orthopaedic Surgery, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan.
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Nakane T, Tando T, Aoyagi K, Hatakeyama K, Nishimura G, Coucke IPJ, Mortier G, Sugita K. Dysspondyloenchondromatosis: Another COL2A1-Related Skeletal Dysplasia? Mol Syndromol 2011; 2:21-26. [PMID: 22570642 DOI: 10.1159/000333098] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/08/2011] [Indexed: 11/19/2022] Open
Abstract
Dysspondyloenchondromatosis (DSC) is a rare skeletal dysplasia that has currently been classified into the group of spondylometaphyseal dysplasias. To date, only 12 affected individuals have been reported. All cases are sporadic, and the etiology remains unknown. Distinctive features of DSC are anisospondyly and enchondroma-like lesions in the metaphyseal and diaphyseal portions of the long tubular bones. Affected individuals usually develop kyphoscoliosis and asymmetric limb shortening at an early age. Interestingly, some of the skeletal changes overlap with spondyloepimetaphyseal dysplasia (SEMD) Strudwick type, a rare type II collagen disorder. Based on this resemblance we postulated that DSC may be allelic to SEMD Strudwick type and therefore performed a COL2A1 analysis in an affected boy who was diagnosed as having DSC at the age of 3 years. The identification of a novel heterozygous COL2A1 missense mutation (p.Gly753Asp) in the proband confirms our hypothesis and suggests that DSC may be another type II collagen disorder.
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Affiliation(s)
- T Nakane
- Department of Pediatrics, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
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Nagamatsu S, Ohara-Imaizumi M, Nakamichi Y, Aoyagi K, Nishiwaki C. DPP-4 inhibitor des-F-sitagliptin treatment increased insulin exocytosis from db/db mice β cells. Biochem Biophys Res Commun 2011; 412:556-60. [PMID: 21854759 DOI: 10.1016/j.bbrc.2011.07.119] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Accepted: 07/29/2011] [Indexed: 10/17/2022]
Abstract
Incretin promotes insulin secretion acutely. Recently, orally-administered DPP-4 inhibitors represent a new class of anti-hyperglycemic agents. Indeed, inhibitors of dipeptidyl peptidase-IV (DPP-4), sitagliptin, has just begun to be widely used as therapeutics for type 2 diabetes. However, the effects of sitagliptin-treatment on insulin exocytosis from single β-cells are yet unknown. We therefore investigated how sitagliptin-treatment in db/db mice affects insulin exocytosis by treating db/db mice with des-F-sitagliptin for 2 weeks. Perfusion studies showed that 2 weeks-sitagliptin treatment potentiated insulin secretion. We then analyzed insulin granule motion and SNARE protein, syntaxin 1, by TIRF imaging system. TIRF imaging of insulin exocytosis showed the increased number of docked insulin granules and increased fusion events from them during first-phase release. In accord with insulin exocytosis data, des-F-sitagliptin-treatment increased the number of syntaxin 1 clusters on the plasma membrane. Thus, our data demonstrated that 2-weeks des-F-sitagliptin-treatment increased the fusion events of insulin granules, probably via increased number of docked insulin granules and that of syntaxin 1 clusters.
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Affiliation(s)
- Shinya Nagamatsu
- Department of Biochemistry, Kyorin University School of Medicine, Mitaka, Tokyo, Japan.
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Gursu M, Aydin Z, Karadag S, Uzun S, Ogul S, Kiris A, Doventas Y, Koldas M, Ozturk S, Kazancioglu R, Mandreoli M, Bellasi A, Baldrati L, Corradini M, Rigotti A, Russo G, David S, Malmusi G, DiNicolo' P, Orsi C, Zambianchi L, Caruso F, Poisetti P, Fabbri A, Santoro A, Barton Pai A, Grabe D, Eisele G, Hutchison CA, Bevins A, Lukacik P, Hughes RG, Pratt G, Viana JL, Bishop NC, Kosmadakis G, Bevington A, Clapp EL, Feehally J, Smith AC, Joki N, Hase H, Tanaka Y, Iwasaki M, Yamaka T, Shigematsu T, Dou L, Gondouin B, Cerini C, Duval-Sabatier A, Poitevin S, Dignat-George F, Burtey S, Brunet P, Carrasco F, Salvador F, Origaca C, Nogueira E, Silva N, Silva A, Sikole A, Trajceska L, Selim G, Gelev S, Dzekova P, Amitov V, Arsov S, Dalboni M, Cruz E, Manfredi S, Mouro M, Quinto M, Grabulosa C, Batista M, Cendoroglo M, Hirayama A, Matsui H, Nagano Y, Ueda A, Aoyagi K, Owada S, Schepers E, Barreto D, Liabeuf S, Glorieux G, Eloot S, Barreto F, Massy Z, Vanholder R, Secara IF, Oleniuc M, Nistor I, Onofriescu M, Covic A, Aguerrevere S, Granada M, Bayes B, Pastor M, Sancho A, Bonal J, Canas L, Lauzurica R, Teixido J, Troya M, Romero R, Capitanini A, D'Alessandro C, Ferretti V, Petrone I, Pasquariello G, Cupisti A, Parastayeva MM, Berseneva ON, Kucher AG, Ivanova GT, Smirnov AV, Kayukov IG, Kayabasi H, Esmer S, Yilmaz Z, Kadiroglu AK, Yilmaz ME, Radic J, Kovacic V, Radic M, Ljutic D, Sain M, Karakan S, Sezer S, Tutal E, Ozdemir Acar FN, Bi G, Xing C, Chen R, Romero-Garcia A, Jacobo-Arias F, Martin del Campo F, Gonzalez-Espinoza L, Pazarin L, Cueto-Manzano AM, Panagoutsos S, Kriki P, Mourvati E, Tziakas D, Chalikias G, Stakos D, Apostolakis S, Tsigalou C, Gioka T, Konstantinides S, Vargemezis V, Nascimento M, Hayashi S, Seeberger A, Yamamoto T, Qureshi AR, Lind B, Riella M, Brodin LA, Lindholm B, Meier P, Menne J, Kruger K, Mooren FC, Weissmann N, Seimetz M, Haller H, Gusev E, Solomatina L, Zhuravleva J, Striker G, Uribarri J, Cai W, Goodman S, Pyzik R, Grosjean F, Vlassara H, So A, Gimona A, Kiechle T, Shpilsky A, Schlesinger N. Malnutrition & inflammation in CKD 1-5. Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.33] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Maswanya ES, Moji K, Aoyagi K, Takemoto T. Sexual behavior and condom use in female students in Dar-es-Salaam, Tanzania: differences by steady and casual partners. East Afr J Public Health 2011; 8:69-76. [PMID: 22066289] [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: 05/31/2023]
Abstract
OBJECTIVE In Tanzania female youth are increasingly becoming at greater risk of sexually transmitted HIV infection, whereby more than 80% cases occur through un-protected sex. The objective of this study was to examine related-factors which influence female students to have risky sexual contacts with casual partners including condom use and sex with sugar daddies. METHODS A cross section study involving face-to-face interview was conducted regarding sexual behavior among 219 sexually-debuted female students aged between 18 and 24 years who were attending high schools and colleges in Dar-es-salaam, Tanzania. RESULTS Eighty-three percent had at least one boyfriend in the past 12 months, 57% had engaged in sex with a "sugar daddy", and 24% had engaged in sex with a casual partner other than a sugar daddy. Sixty-nine percent had ever used a condom, and 66% had used a condom during their most recent sexual encounter. Thirty-two percent reported always using a condom during sex with their boyfriends, whereas only 2% always used a condom with a sugar daddy. Decision-making about condom use during sex with boyfriends was made by couples together (48%) or by the girls alone (34%), whereas the decision during sex with a sugar daddy was predominantly made by the male partner (79%). Data were analyzed using Statistical Package for Social Sciences (SPSS) version 9.5 for frequencies, cross-tabulations and chi-squired test and statistical significance set at p<0.05. CONCLUSION The study highlighted risk factors for female students towards HIV infection. Receiving money and/or presents were the major motivations for having sex irrelevant with types of sex partners. Although most female's students disagreed in principle to have sex in exchange for money or presents, sex with sugar daddies was common among female students and was a major risk factor for HIV infection. Based on the findings, recommendations for improvement in prevention programs among female youth within Tanzanian context are discussed.
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Affiliation(s)
- E S Maswanya
- National Institute for Medical Research, Dar-es-Salaam, Tanzania.
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Abe Y, Takamura N, Ye Z, Tomita M, Osaki M, Kusano Y, Nakamura T, Aoyagi K, Honda S. Quantitative ultrasound and radiographic absorptiometry are associated with vertebral deformity in Japanese Women: the Hizen-Oshima study. Osteoporos Int 2011; 22:1167-73. [PMID: 20585940 DOI: 10.1007/s00198-010-1295-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2009] [Accepted: 04/19/2010] [Indexed: 12/01/2022]
Abstract
UNLABELLED We evaluated the ability of heel quantitative ultrasound (QUS) and metacarpal radiographic absorptiometry (RA) to identify subjects with vertebral deformities in Japanese women aged ≥40. Both QUS and RA were associated with vertebral deformities, and the estimated prevalence at each T-score widely varied with age. INTRODUCTION Heel QUS and metacarpal RA have been used for screening patients to evaluate risk of osteoporotic fractures. The aim of this study was to evaluate the ability of QUS and RA to identify women with vertebral deformities in 570 Japanese women aged ≥40, and to estimate the prevalence of vertebral deformity at each T-score. METHODS Calcaneal QUS and metacarpal RA were performed. Radiographic vertebral deformities were assessed by quantitative morphometry, defined as vertebral heights more than 3 SD below the normal mean. RESULTS The receiver operating characteristic analysis showed that both calcaneal stiffness index (SI) and metacarpal bone mineral density (BMD) were associated with vertebral deformities. Using the T-score of -2.5 as a cutoff value, the specificity and sensitivity for identifying individuals with vertebral deformities was 65% and 83% for calcaneal SI, and 40% and 88% for metacarpal BMD, respectively. The prevalence of vertebral deformity was estimated using age-adjusted logistic regression models. Women with calcaneal SI T-score of -2.5 had a 2% estimated probability of vertebral deformity at age 40, and 22% at age 80. For metacarpal BMD T-score of -2.5, estimated probability was less than 1% at age 40, and 27% at age 80. CONCLUSION Both calcaneal SI and metacarpal BMD were associated with prevalence of vertebral deformity. Furthermore, the prevalence widely varied with age at any given bone value.
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Affiliation(s)
- Y Abe
- Department of Public Health, Nagasaki University Graduate School of Biomedical Sciences, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan.
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