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Ehren R, Benz MR, Doetsch J, Fichtner A, Gellermann J, Haffner D, Höcker B, Hoyer PF, Kästner B, Kemper MJ, Konrad M, Luntz S, Querfeld U, Sander A, Toenshoff B, Weber LT. Initial treatment of steroid-sensitive idiopathic nephrotic syndrome in children with mycophenolate mofetil versus prednisone: protocol for a randomised, controlled, multicentre trial (INTENT study). BMJ Open 2018; 8:e024882. [PMID: 30309995 PMCID: PMC6252704 DOI: 10.1136/bmjopen-2018-024882] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
INTRODUCTION Idiopathic nephrotic syndrome is the most common glomerular disease in childhood with an incidence of 1.8 cases per 100 000 children in Germany. The treatment of the first episode implies two aspects: induction of remission and sustainment of remission. The recent Kidney Disease Improving Global Outcomes, American Academy of Pediatrics and German guidelines for the initial treatment of the first episode of a nephrotic syndrome recommend a 12-week course of prednisone. Despite being effective, this treatment is associated with pronounced glucocorticoid-associated toxicity due to high-dose prednisone administration over a prolonged period of time. The aim of the INTENT study (Initial treatment of steroid-sensitive idiopathic nephrotic syndrom in children with mycophenolate mofetil versus prednisone: protocol for a randomised, controlled, multicentre trial) is to show that an alternative treatment regimen with mycophenolic acid is not inferior regarding sustainment of remission, but with lower toxicity compared with treatment with glucocorticoids only. METHODS AND DESIGN The study is designed as an open, randomised, controlled, multicentre trial. 340 children with a first episode of steroid-sensitive nephrotic syndrome and who achieved remission by a standard prednisone regimen will be enrolled in the trial and randomised to one of two treatment arms. The standard care group will be treated with prednisone for a total of 12 weeks; in the experimental group the treatment is switched to mycophenolate mofetil, also for a total of 12 weeks in treatment duration. The primary endpoint is the occurrence of a treated relapse within 24 months after completion of initial treatment. ETHICS AND DISSEMINATION Ethics approval for this trial was granted by the ethics committee of the Medical Faculty of the University of Heidelberg (AFmu-554/2014). The study results will be published in accordance with the Consolidated Standards of Reporting Trials statement and the Standard Protocol Items: Recommendations for Interventional Trials guidelines. Our findings will be submitted to major international paediatric nephrology and general paediatric conferences and submitted for publication in a peer-reviewed, open-access journal. TRIAL REGISTRATION NUMBER DRKS0006547; EudraCT2014-001991-76; Pre-result. DATE OF REGISTRATION 30 October 2014; 24 February 2017.
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Affiliation(s)
- Rasmus Ehren
- Department of Pediatrics, University Children’s Hospital Köln, University Hospital Köln, Köln, Germany
| | - Marcus R Benz
- Department of Pediatrics, University Children’s Hospital Köln, University Hospital Köln, Köln, Germany
| | - Jorg Doetsch
- Department of Pediatrics, University Children’s Hospital Köln, University Hospital Köln, Köln, Germany
| | - Alexander Fichtner
- Department of Pediatrics I, University Children’s Hospital Heidelberg, Heidelberg, Germany
| | - Jutta Gellermann
- Department of Pediatrics, University Children’s Hospital Berlin, University Hospital Berlin Charité, Berlin, Germany
| | - Dieter Haffner
- Department of Pediatrics, University Children’s Hospital Hannover, University Hospital Hannover, Hannover, Germany
| | - Britta Höcker
- Department of Pediatrics I, University Children’s Hospital Heidelberg, Heidelberg, Germany
| | - Peter F Hoyer
- Department of Pediatrics, University Children’s Hospital Essen, University Hospital Essen, Essen, Germany
| | - Bärbel Kästner
- KKS (Coordination Center for Clinical Trials), University Hospital of Heidelberg, Heidelberg, Germany
| | - Markus J Kemper
- Department of Pediatrics, Asklepios Klinik Nord – Heidberg, Hamburg, Germany
| | - Martin Konrad
- Department of Pediatrics, University Children’s Hospital Münster, University Hospital Münster, Münster, Germany
| | - Steffen Luntz
- KKS (Coordination Center for Clinical Trials), University Hospital of Heidelberg, Heidelberg, Germany
| | - Uwe Querfeld
- Department of Pediatrics, University Children’s Hospital Berlin, University Hospital Berlin Charité, Berlin, Germany
| | - Anja Sander
- Institute of Medical Biometry and Informatics, University of Heidelberg, Heidelberg, Germany
| | - Burkhard Toenshoff
- Department of Pediatrics I, University Children’s Hospital Heidelberg, Heidelberg, Germany
| | - Lutz T Weber
- Department of Pediatrics, University Children’s Hospital Köln, University Hospital Köln, Köln, Germany
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Neumann T, Lodes S, Kästner B, Franke S, Kiehntopf M, Lehmann T, Müller UA, Wolf G, Sämann A. Osteocalcin, adipokines and their associations with glucose metabolism in type 1 diabetes. Bone 2016; 82:50-5. [PMID: 25888930 DOI: 10.1016/j.bone.2015.04.017] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Revised: 03/27/2015] [Accepted: 04/08/2015] [Indexed: 01/26/2023]
Abstract
To determine osteocalcin (OC) and adipokines in type 1 diabetes (T1D) and healthy controls, and to explore possible associations between glucose and bone metabolism, body composition and adipokines. Serum levels of total OC, undercarboxylated (UC-OC), leptin, adiponectin, and other parameters of glucose and bone metabolism were measured in 128 patients with T1D (mean duration 21.2years) and in 77 healthy controls, matched for gender, age, and body mass index (BMI). Partial correlations (adjusted for age and gender) with parameters of body composition (BMI, fat body mass [derived from bone mineral density scans]), glycaemic control (hemoglobin A1c (HbA1c), daily insulin dose in T1D), skeletal homeostasis (osteoprotegerin (OPG), receptor activator of NF-κB ligand (RANKL), all measured in serum), and serum insulin-like growth factor 1 (IGF-1) were also examined. Independent predictors of total and UC-OC were then explored. Total OC was lower in males with T1D (16.3±6.4 vs. 22.2±9.9ng/ml; p=0.001), whereas UC-OC did not show group differences. Adiponectin was higher in T1D patients, both for males and females (8.9±6.6 vs. 5.7±2.5μg/ml; p=0.004 and 13.8±6.4 vs. 8.8±4.0μg/ml; p<0.001). IGF-1 was lower only in females with T1D (146.6±68.8 vs. 203.0±74.4ng/ml; p<0.001). BMI and fat body mass were similar in T1D and controls. In T1D patients, total OC was inversely correlated with BMI and HbA1c, and UC-OC inversely correlated with HbA1c. In T1D patients, leptin positively correlated with BMI, fat body mass and daily insulin dose, while adiponectin inversely correlated with BMI and daily insulin dose. Multivariate regression modelling showed that determinants of higher total OC levels were male gender (p=0.04, ß-coefficient=2.865) and lower HbA1c (p=0.04, ß-coefficient=-0.117), whereas determinants of UC-OC levels were T1D (p=0.016, ß-coefficient=2.015), higher IGF-1 (p=0.004, ß-coefficient=0.011) and lower HbA1c (p=0.011, ß-coefficient=- 0.061). Total OC and UC-OC are associated with good glycaemic control in T1D, with gender-specific differences for total-OC. The association of leptin and adiponectin with glycaemic control, as observed in controls, does not seem to be a feature in T1D, although both adipokines appear to be related to the insulin demand. This article is part of a Special Issue entitled "Bone and diabetes".
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Affiliation(s)
- T Neumann
- Department of Internal Medicine III, Jena University-Hospital, Jena, Germany.
| | - S Lodes
- Department of Internal Medicine III, Jena University-Hospital, Jena, Germany
| | - B Kästner
- Department of Internal Medicine III, Jena University-Hospital, Jena, Germany
| | - S Franke
- Department of Internal Medicine III, Jena University-Hospital, Jena, Germany
| | - M Kiehntopf
- Institute of Clinical Chemistry and Laboratory Diagnostics, Jena University-Hospital, Jena, Germany
| | - T Lehmann
- Institute of Medical Statistics, Computer Sciences and Documentation, Jena University-Hospital, Jena, Germany
| | - U A Müller
- Department of Internal Medicine III, Jena University-Hospital, Jena, Germany
| | - G Wolf
- Department of Internal Medicine III, Jena University-Hospital, Jena, Germany
| | - A Sämann
- Department of Internal Medicine III, Jena University-Hospital, Jena, Germany
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Neumann T, Lodes S, Kästner B, Lehmann T, Hans D, Lamy O, Müller UA, Wolf G, Sämann A. Trabecular bone score in type 1 diabetes--a cross-sectional study. Osteoporos Int 2016; 27:127-33. [PMID: 26187124 DOI: 10.1007/s00198-015-3222-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [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: 02/24/2015] [Accepted: 06/23/2015] [Indexed: 12/21/2022]
Abstract
UNLABELLED Trabecular bone score (TBS) seems to provide additive value on BMD to identify individuals with prevalent fractures in T1D. TBS did not significantly differ between T1D patients and healthy controls, but TBS and HbA1c were independently associated with prevalent fractures in T1D. A TBS cutoff <1.42 reflected prevalent fractures with 91.7 % sensitivity and 43.2 % specificity. INTRODUCTION Type 1 diabetes (T1D) increases the risk of osteoporotic fractures. TBS was recently proposed as an indirect measure of bone microarchitecture. This study aimed at investigating the TBS in T1D patients and healthy controls. Associations with prevalent fractures were tested. METHODS One hundred nineteen T1D patients (59 males, 60 premenopausal females; mean age 43.4 ± 8.9 years) and 68 healthy controls matched for gender, age, and body mass index (BMI) were analyzed. The TBS was calculated in the lumbar region, based on two-dimensional (2D) projections of DXA assessments. RESULTS TBS was 1.357 ± 0.129 in T1D patients and 1.389 ± 0.085 in controls (p = 0.075). T1D patients with prevalent fractures (n = 24) had a significantly lower TBS than T1D patients without fractures (1.309 ± 0.125 versus 1.370 ± 0.127, p = 0.04). The presence of fractures in T1D was associated with lower TBS (odds ratio = 0.024, 95 % confidence interval (CI) = 0.001-0.875; p = 0.042) but not with age or BMI. TBS and HbA1c were independently associated with fractures. The area-under-the curve (AUC) of TBS was similar to that of total hip BMD in discriminating T1D patients with or without prevalent fractures. In this set-up, a TBS cutoff <1.42 discriminated the presence of fractures with a sensitivity of 91.7 % and a specificity of 43.2 %. CONCLUSIONS TBS values are lower in T1D patients with prevalent fractures, suggesting an alteration of bone strength in this subgroup of patients. Reliable TBS cutoffs for the prediction of fracture risk in T1D need to be determined in larger prospective studies.
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Affiliation(s)
- T Neumann
- Department of Internal Medicine III, Erlanger Allee 101, Jena University Hospital, 07747, Jena, Germany.
| | - S Lodes
- Department of Internal Medicine III, Erlanger Allee 101, Jena University Hospital, 07747, Jena, Germany
| | - B Kästner
- Department of Internal Medicine III, Erlanger Allee 101, Jena University Hospital, 07747, Jena, Germany
| | - T Lehmann
- Institute of Medical Statistics, Computer Sciences and Documentation, Jena University Hospital, Jena, Germany
| | - D Hans
- Bone Disease Unit, University of Lausanne, Lausanne, Switzerland
| | - O Lamy
- Bone Disease Unit, University of Lausanne, Lausanne, Switzerland
| | - U A Müller
- Department of Internal Medicine III, Erlanger Allee 101, Jena University Hospital, 07747, Jena, Germany
| | - G Wolf
- Department of Internal Medicine III, Erlanger Allee 101, Jena University Hospital, 07747, Jena, Germany
| | - A Sämann
- Department of Internal Medicine III, Erlanger Allee 101, Jena University Hospital, 07747, Jena, Germany
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Kästner B, Behre S, Lutz N, Bürger F, Luntz S, Hinderhofer K, Bendszus M, Hoffmann GF, Ries M. Clinical Research in Vulnerable Populations: Variability and Focus of Institutional Review Boards' Responses. PLoS One 2015; 10:e0135997. [PMID: 26275228 PMCID: PMC4537221 DOI: 10.1371/journal.pone.0135997] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [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: 06/16/2015] [Accepted: 07/28/2015] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Children and patients with cognitive deficits may find it difficult to understand the implication of research. In the European Union (EU), clinical studies outside the EU directives concerning medicinal products or medical devices, i.e., "miscellaneous clinical studies", have no legally mandated timelines for institutional review boards' (IRB) decisions. GOAL To evaluate the review process of IRBs for two different "miscellaneous" multicenter clinical research protocols involving vulnerable subjects (children and adult stroke patients). METHODS Descriptive and comparative statistics. Protocol 1 is a prospective, multicenter, cross-sectional screening study of a symptomatic pediatric population at risk for Fabry disease involving genetic testing (NCT02152189). Protocol 2 is a prospective, multicenter, randomized, controlled, open-label, blinded endpoint post-market study to evaluate the effectiveness of stent retrievers (NCT02135926). After having obtained positive initial IRB votes at the main study site, both protocols were subsequently submitted to the remaining IRBs. RESULTS Protocol 1 was submitted to 19 IRBs. No IRB objected to the study. Median time-to-final vote was 34 (IQR 10-65; range 0 to 130) days. Two IRBs accepted the coordinating center's IRB votes without re-evaluation. Changes to the informed consent documents were asked by 7/19 IRBs, amendments to the protocol by 2. Protocol 2 was submitted to 16 IRBs. Fifteen decisions were made. No IRB objected to the study. Median time-to final vote was 59 (IQR 10 to 65; range 0 to 128) days, which was not statistically significantly different compared with protocol 1 (Wilcoxon test). Two IRBs accepted a previous IRB decision and did not conduct an independent review. Eight/16 IRBs required changes to the informed consent documents; two IRBs recommended an amendment of the protocol. CONCLUSION Both clinical research protocols involving vulnerable populations were well accepted. IRB workflows and decision times varied substantially. Some IRBs accepted a previous IRB decision without the necessity of another reevaluation process. Requested changes were focused on the informed consent documents. A more standardized approach across jurisdictions is desirable.
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Affiliation(s)
- Bärbel Kästner
- Coordination Center for Clinical Trials (KKS), University Hospital Heidelberg, Heidelberg, Germany
| | - Simone Behre
- Coordination Center for Clinical Trials (KKS), University Hospital Heidelberg, Heidelberg, Germany
| | - Nadine Lutz
- Pediatric Neurology and Metabolic Medicine, Center for Rare Disease, Center for Pediatric and Adolescent Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Friederike Bürger
- Pediatric Neurology and Metabolic Medicine, Center for Rare Disease, Center for Pediatric and Adolescent Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Steffen Luntz
- Coordination Center for Clinical Trials (KKS), University Hospital Heidelberg, Heidelberg, Germany
| | - Katrin Hinderhofer
- Institute for Human Genetics, University Hospital Heidelberg, Heidelberg, Germany
| | - Martin Bendszus
- Neuroradiology, Department of Neurology, University Hospital Heidelberg, Heidelberg, Germany
| | - Georg F. Hoffmann
- Pediatric Neurology and Metabolic Medicine, Center for Rare Disease, Center for Pediatric and Adolescent Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Markus Ries
- Pediatric Neurology and Metabolic Medicine, Center for Rare Disease, Center for Pediatric and Adolescent Medicine, University Hospital Heidelberg, Heidelberg, Germany
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Weller M, Tabatabai G, Kästner B, Felsberg J, Steinbach JP, Wick A, Schnell O, Hau P, Herrlinger U, Sabel MC, Wirsching HG, Ketter R, Bähr O, Platten M, Tonn JC, Schlegel U, Marosi C, Goldbrunner R, Stupp R, Homicsko K, Pichler J, Nikkhah G, Meixensberger J, Vajkoczy P, Kollias S, Hüsing J, Reifenberger G, Wick W. MGMT Promoter Methylation Is a Strong Prognostic Biomarker for Benefit from Dose-Intensified Temozolomide Rechallenge in Progressive Glioblastoma: The DIRECTOR Trial. Clin Cancer Res 2015; 21:2057-64. [PMID: 25655102 DOI: 10.1158/1078-0432.ccr-14-2737] [Citation(s) in RCA: 226] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 01/22/2015] [Indexed: 11/16/2022]
Abstract
PURPOSE Rechallenge with temozolomide (TMZ) at first progression of glioblastoma after temozolomide chemoradiotherapy (TMZ/RT→TMZ) has been studied in retrospective and single-arm prospective studies, applying temozolomide continuously or using 7/14 or 21/28 days schedules. The DIRECTOR trial sought to show superiority of the 7/14 regimen. EXPERIMENTAL DESIGN Patients with glioblastoma at first progression after TMZ/RT→TMZ and at least two maintenance temozolomide cycles were randomized to Arm A [one week on (120 mg/m(2) per day)/one week off] or Arm B [3 weeks on (80 mg/m(2) per day)/one week off]. The primary endpoint was median time-to-treatment failure (TTF) defined as progression, premature temozolomide discontinuation for toxicity, or death from any cause. O(6)-methylguanine DNA methyltransferase (MGMT) promoter methylation was prospectively assessed by methylation-specific PCR. RESULTS Because of withdrawal of support, the trial was prematurely closed to accrual after 105 patients. There was a similar outcome in both arms for median TTF [A: 1.8 months; 95% confidence intervals (CI), 1.8-3.2 vs. B: 2.0 months; 95% CI, 1.8-3.5] and overall survival [A: 9.8 months (95% CI, 6.7-13.0) vs. B: 10.6 months (95% CI, 8.1-11.6)]. Median TTF in patients with MGMT-methylated tumors was 3.2 months (95% CI, 1.8-7.4) versus 1.8 months (95% CI, 1.8-2) in MGMT-unmethylated glioblastoma. Progression-free survival rates at 6 months (PFS-6) were 39.7% with versus 6.9% without MGMT promoter methylation. CONCLUSIONS Temozolomide rechallenge is a treatment option for MGMT promoter-methylated recurrent glioblastoma. Alternative strategies need to be considered for patients with progressive glioblastoma without MGMT promoter methylation.
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Affiliation(s)
- Michael Weller
- Department of Neurology, University Hospital Zurich, Zurich, Switzerland.
| | - Ghazaleh Tabatabai
- Department of Neurology, University Hospital Zurich, Zurich, Switzerland
| | - Bärbel Kästner
- Clinical Trial Center Heidelberg, University Hospital Heidelberg, Heidelberg, Germany
| | - Jörg Felsberg
- Department of Neuropathology, Heinrich Heine University Düsseldorf, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Joachim P Steinbach
- Dr. Senckenberg Institute for Neuro-Oncology, University Hospital Frankfurt, Frankfurt, Germany
| | - Antje Wick
- Department of Neurology, Heidelberg University Medical Center; National Center for Tumor Diseases Heidelberg, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Oliver Schnell
- Department of Neurosurgery, Ludwig Maximilian University of Munich, Munich, Germany
| | - Peter Hau
- Department of Neurology and Wilhelm Sander-NeuroOncology Unit, University Hospital Regensburg, Regensburg, Germany
| | - Ulrich Herrlinger
- Division of Clinical Neuro-Oncology, Department of Neurology, University of Bonn Medical Center, Bonn, Germany
| | - Michael C Sabel
- Department of Neurosurgery, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | | | - Ralf Ketter
- Department of Neurosurgery, Saarland University, Homburg, Germany
| | - Oliver Bähr
- Dr. Senckenberg Institute for Neuro-Oncology, University Hospital Frankfurt, Frankfurt, Germany
| | - Michael Platten
- Department of Neurology, Heidelberg University Medical Center; National Center for Tumor Diseases Heidelberg, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Jörg C Tonn
- Department of Neurosurgery, Ludwig Maximilian University of Munich, Munich, Germany
| | - Uwe Schlegel
- Department of Neurology, University Hospital Bochum, Bochum, Germany
| | - Christine Marosi
- Department of Oncology, Medical University Vienna, Vienna, Austria
| | - Roland Goldbrunner
- Department of Neurosurgery, University Hospital Cologne, Cologne, Germany
| | - Roger Stupp
- Department of Neurosciences, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | - Krisztian Homicsko
- Department of Neurosciences, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland
| | | | - Guido Nikkhah
- Department of Neurosurgery, University Hospital Freiburg, Germany
| | | | - Peter Vajkoczy
- Department of Neurosurgery, University Hospital Berlin Charité, Germany
| | - Spyros Kollias
- Department of Neuroradiology, University Hospital Zurich, Zurich, Switzerland
| | - Johannes Hüsing
- Clinical Trial Center Heidelberg, University Hospital Heidelberg, Heidelberg, Germany
| | - Guido Reifenberger
- Department of Neuropathology, Heinrich Heine University Düsseldorf, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Wolfgang Wick
- Department of Neurology, Heidelberg University Medical Center; National Center for Tumor Diseases Heidelberg, German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
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Neumann T, Lodes S, Kästner B, Franke S, Kiehntopf M, Lehmann T, Müller UA, Wolf G, Sämann A. High serum pentosidine but not esRAGE is associated with prevalent fractures in type 1 diabetes independent of bone mineral density and glycaemic control. Osteoporos Int 2014; 25:1527-33. [PMID: 24599273 DOI: 10.1007/s00198-014-2631-7] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 01/28/2014] [Indexed: 12/12/2022]
Abstract
UNLABELLED Fracture risk in type 1 diabetes (T1D) is supposed to be underestimated by bone mineral density (BMD). Individuals with T1D had more prevalent fractures in a cross-sectional study. Serum levels of pentosidine, an advanced glycation end product, and poor glycaemic control were associated with prevalent fractures independent of BMD. INTRODUCTION Type 1 diabetes (T1D) is associated with increased fracture risk. Bone mineral density (BMD) underestimates the risk of fractures in some individuals. The accumulation of advanced glycation end products (AGEs) impairs bone matrix and reduces bone strength. METHODS In a cross-sectional study, 128 men and premenopausal women with T1D were evaluated. We compared traditional risk factors for fractures, BMD, parameters of bone metabolism and AGEs in individuals with and without prevalent fractures. An independent association of serum AGE levels with prevalent fractures was investigated. RESULTS Individuals with prevalent fractures exhibited a longer duration of T1D, higher HbA1c and more diabetic-related complications. BMD at the femoral neck (z-score -0.76 ± 0.94 vs. -0.23 ± 1.02; p = 0.031) and total hip (z-score -0.54 ± 0.93 vs. 0.11 ± 1.11; p = 0.017) was lower in those with prevalent fractures. Individuals with fractures had higher pentosidine levels (164.1 ± 53.6 vs. 133.2 ± 40.4; p = 0.002). The levels of N-ε-(carboxymethyl)-lysine (CML) and endogenous secretory receptor for AGEs (esRAGE) did not significantly differ. Multivariate logistic regression analysis adjusted for age, BMI, family history of fractures, smoking, vitamin D deficiency, BMD at lumbar spine, femoral neck and total hip identified pentosidine levels and HbA1c as independent factors associated with prevalent fractures (odds ratio 1.02, 95% CI 1.00-1.03/pmol/ml increase of pentosidine; p = 0.008 and odds ratio 1.93, 95% CI 1.16-3.20 per percentage increase of HbA1c; p = 0.011). CONCLUSIONS The pentosidine levels but not BMD are independently associated with prevalent fractures. Impaired bone quality in T1D may result from increased AGE formation.
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Affiliation(s)
- T Neumann
- Department of Internal Medicine III, Jena University Hospital, Erlanger Allee 101, 07747, Jena, Germany,
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Neumann T, Sämann A, Lodes S, Kästner B, Franke S, Kiehntopf M, Hemmelmann C, Lehmann T, Müller UA, Hein G, Wolf G. Glycaemic control is positively associated with prevalent fractures but not with bone mineral density in patients with Type 1 diabetes. Diabet Med 2011; 28:872-5. [PMID: 21395677 DOI: 10.1111/j.1464-5491.2011.03286.x] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
AIM There are conflicting data regarding the risk of osteoporosis in patients with Type 1 diabetes. We investigated an association between diabetes, bone mineral density and prevalent fractures. METHODS A single-centre, cross-sectional study of men and pre-menopausal women with Type 1 diabetes (n = 128) and a matched control group (n = 77) was conducted. The primary outcome measure was bone mineral density and secondary measures were markers of bone metabolism and prevalent fractures. RESULTS Hip and total body bone mineral densities were significantly lower in women with diabetes compared with control subjects. In men, no difference in bone mineral density was found. A multivariate regression analysis in women with diabetes revealed higher BMI as the strongest predictor of higher total hip, femoral neck and total body bone mineral density, whereas previous fractures were inversely associated with total hip bone mineral density and C-terminal telopeptide of type I collagen with total body bone mineral density. Poor long-term glycaemic control was not associated with low bone mineral density. Fracture frequency was higher in patients with diabetes compared with control subjects (1.64 vs. 0.62 per 100 patient-years; P < 0.05). In a multivariable model, long-term HbA(1c) control was associated with increased clinical fracture prevalence (OR 1.92; 95% CI 1.09-2.75) in those with diabetes. CONCLUSIONS Type 1 diabetes contributes to low bone mineral density in women. Previous fractures and low BMI were strong predictors of impaired bone mineral density and should therefore be considered in risk estimation. Fractures are more frequent in Type 1 diabetes. Long-term hyperglycaemia may account for impaired bone strength, independently from bone mineral density.
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Affiliation(s)
- T Neumann
- Department of Medicine III, University-Hospital Jena, Jena, Germany.
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Zimmer G, Gerstmann K, Kästner B, Bolz J. [P1.01]: Ephrin‐a5 affects the laminar organisation of the neocortex. Int J Dev Neurosci 2010. [DOI: 10.1016/j.ijdevneu.2010.07.042] [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] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Affiliation(s)
- G. Zimmer
- Friedrich‐Schiller Universität JenaGermany
| | | | - B. Kästner
- Friedrich‐Schiller Universität JenaGermany
| | - J. Bolz
- Friedrich‐Schiller Universität JenaGermany
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Danova D, Keil B, Kästner B, Wulff J, Fiebich M, Zink K, Klose K, Heverhagen J. Reduction Of Uterus Dose In Clinical Thoracic Computed Tomography. ROFO-FORTSCHR RONTG 2010; 182:1091-6. [DOI: 10.1055/s-0029-1245809] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Kästner B, Danova D, Wulff J, Völker M, Rominger M, Heverhagen JT. Evaluierung des Dosisreduktionspotentials durch den Einsatz von Augenprotektoren in der Computertomographie mittels Thermolumineszenzdosimetrie. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1253060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kästner B, Völker M, Keil B, Figiel J, Rominger M, Klose KJ, Heverhagen T. Effekt der Herzfrequenz auf die Dosis in der Koronaren Angiographie mittels 64-Zeilen Dual-Source CT. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221549] [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: 10/20/2022]
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Kaiser FJ, Kohler S, Hänggi P, Malecha M, Ebbecke J, Wixforth A, Schumacher HW, Kästner B, Reuter D, Wieck AD. Theoretical and experimental investigations of Coulomb blockade in coupled quantum dot systems. J Phys Condens Matter 2008; 20:374108. [PMID: 21694415 DOI: 10.1088/0953-8984/20/37/374108] [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] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Two strongly coupled quantum dots are theoretically and experimentally investigated. In conductance measurements on a GaAs based low-dimensional system additional features to the Coulomb blockade have been detected at low temperatures. These regions of finite conductivity are compared with theoretical investigations of a strongly coupled quantum dot system and good agreement between the theoretical and the experimental results has been found.
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Affiliation(s)
- F J Kaiser
- Theoretische Physik I, Institut für Physik der Universität Augsburg, Universitätsstraße 1, 86135 Augsburg, Germany
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Lodes S, Neumann T, Sämann A, Kästner B, Hemmelmann C, Kloos C, Hein G, Wolf G, Müller UA. Die Knochendichte bei Patienten mit Typ-1-Diabetes ist nicht assoziiert mit der Qualität der langfristigen Stoffwechselkontrolle. DIABETOL STOFFWECHS 2008. [DOI: 10.1055/s-2008-1076461] [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: 10/21/2022]
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Vogel R, Kästner B, Bossard S. [Nursing diagnosis in patients with artificial respiration. A method of problem solving in nursing]. Pflege Aktuell 1994; 48:589-92. [PMID: 7952521] [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: 01/28/2023]
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