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Kanzelmeyer NK, Lerch C, Hohmann D, Junge C, Neubert L, Fieguth A, Beerbaum P, Haffner D, Pape L, Böhne M. Cardiac Involvement in Shiga Toxin-Producing Escherichia coli–Induced Hemolytic Uremic Syndrome. Thorac Cardiovasc Surg 2022. [DOI: 10.1055/s-0042-1742975] [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: 10/18/2022]
Affiliation(s)
- N. K. Kanzelmeyer
- Department of Pediatric Nephrology, Medizinische Hochschule Hannover, Hannover, Deutschland
| | - C. Lerch
- Department of Pediatric Nephrology, Medizinische Hochschule Hannover, Hannover, Deutschland
| | - D. Hohmann
- Pädiatrische Kardiologie und intensivmedizin, Medizinische Hochschule Hannover, Hannover, Deutschland
| | - C. Junge
- Pediatric Cardiology, Medizinische Hochschule Hannover, Hannover, Deutschland
| | - L. Neubert
- Institute of Pathology, Medizinische Hochschule Hannover, Hannover, Deutschland
| | - A. Fieguth
- Institute of Legal Medicine, Medizinische Hochschule Hannover, Hannover, Deutschland
| | - P. Beerbaum
- Medizinische Hochschule Hannover, Hannover, Deutschland
| | - D. Haffner
- Department of Pediatric Nephrology, Medizinische Hochschule Hannover, Hannover, Deutschland
| | - L. Pape
- Department of Pediatric Nephrology, Medizinische Hochschule Hannover, Hannover, Deutschland
| | - M. Böhne
- Pediatric Cardiology, Medizinische Hochschule Hannover, Hannover, Deutschland
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Yazıcıoğlu B, Bakkaloğlu SA, Abranches M, Akman S, Alpay H, Ariceta G, Atmış B, Bael A, Bakkaloğlu SA, Bayrakçı US, Bhimma R, Bjerre A, Bonzel KE, Çeleğen K, Delibaş A, Demircioğlu B, Dursun I, Ertan P, Flögelova H, Gülleroğlu K, Gürgöze MK, Hacıhamdioğlu DÖ, Haffner D, Hansen PR, Jankauskiene A, Jobs K, Kopač M, Liebau MC, Marks SD, Maxted A, Nalçacıoğlu H, Oh J, Özçelik G, Papalia TSS, Papizh S, Poyrazoğlu H, Prikhodina L, Schmidt IM, Schmitt CP, Shroff R, Sönmez F, Stabouli S, Szczepanska M, Tabel Y, Tasic V, Teixeira A, Topaloğlu R, Walle JV, Vidal E, Vondrak K, Yavaşcan Ö, Yazıcıoğlu B, Yıldız G, Yılmaz D, Zaloszyc A, Zieg J. Correction to: Impact of coronavirus disease-2019 on pediatric nephrology practice and education: an ESPN survey. Pediatr Nephrol 2022; 37:1943-1944. [PMID: 35211799 PMCID: PMC8869343 DOI: 10.1007/s00467-022-05473-w] [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] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Burcu Yazıcıoğlu
- grid.25769.3f0000 0001 2169 7132Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - Sevcan A. Bakkaloğlu
- grid.25769.3f0000 0001 2169 7132Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | | | - M Abranches
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - S Akman
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - H Alpay
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - G Ariceta
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - B Atmış
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - A Bael
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - S A Bakkaloğlu
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - U S Bayrakçı
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - R Bhimma
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - A Bjerre
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - K E Bonzel
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - K Çeleğen
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - A Delibaş
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - B Demircioğlu
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - I Dursun
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - P Ertan
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - H Flögelova
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - K Gülleroğlu
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - M K Gürgöze
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - D Ö Hacıhamdioğlu
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - D Haffner
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - P R Hansen
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - A Jankauskiene
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - K Jobs
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - M Kopač
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - M C Liebau
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - S D Marks
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - A Maxted
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - H Nalçacıoğlu
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - J Oh
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - G Özçelik
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - T S S Papalia
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - S Papizh
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - H Poyrazoğlu
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - L Prikhodina
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - I M Schmidt
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - C P Schmitt
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - R Shroff
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - F Sönmez
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - S Stabouli
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - M Szczepanska
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - Y Tabel
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - V Tasic
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - A Teixeira
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - R Topaloğlu
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - J Vande Walle
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - E Vidal
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - K Vondrak
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - Ö Yavaşcan
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - B Yazıcıoğlu
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - G Yıldız
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - D Yılmaz
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - A Zaloszyc
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
| | - J Zieg
- Department of Pediatric Nephrology, Gazi University School of Medicine, Ankara, Turkey
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Rohayem J, Haffner D, Cremers JF, Huss S, Wistuba J, Weitzel D, Kliesch S, Hohenfellner K. Testicular function in males with infantile nephropathic cystinosis. Hum Reprod 2021; 36:1191-1204. [PMID: 33822926 PMCID: PMC8058591 DOI: 10.1093/humrep/deab030] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 01/25/2021] [Indexed: 11/13/2022] Open
Abstract
STUDY QUESTION Do males with the rare lysosomal storage disease infantile nephropathic cystinosis (INC) have a chance of biological fatherhood? SUMMARY ANSWER Cryostorage of semen could be an option for approximately 20% of young males with INC, with surgical sperm retrieval from the centre of the testes providing additional opportunities for fatherhood. WHAT IS KNOWN ALREADY Biallelic mutations in the cystinosin (CTNS) gene in INC cause dysfunction in cystine transport across lysosomal membranes and cystine accumulation throughout the body. Spontaneous paternity in cystinosis has not been described, despite the availability of cysteamine treatment. Azoospermia has been diagnosed in small case series of males with INC. ART using ICSI requires few spermatozoa, either from semen or extracted surgically from the testes of azoospermic men. However, there is limited evidence to suggest this could be successful in INC. STUDY DESIGN, SIZE, DURATION In this prospective cohort study performed between 2018 and 2019, we performed a cross-sectional investigation of 18 male patients with INC to delineate endocrine and spermatogenic testicular function. PARTICIPANTS/MATERIALS, SETTING, METHODS Serum hormone levels, semen samples (according to World Health Organization 2010 standards), and testicular ultrasound images were analysed in 18 male patients aged 15.4–40.5 years. Surgical sperm extraction was performed in two, and their testicular biopsies were investigated by light and electron microscopy. Past adherence to cysteamine treatment was assessed from medical record information, using a composite scoring system. MAIN RESULTS AND THE ROLE OF CHANCE Adherence to cysteamine treatment was high in most patients. Testicular volumes and testosterone levels were in the normal ranges, with the exception of two and three older patients, respectively. Serum LH levels were above the normal range in all subjects aged ≥20 years. FSH levels were elevated in all but four males: three with spermatozoa in semen and one adolescent. Inhibin B levels were shown to be lower in older men. Testicular ultrasound revealed signs of obstruction in 67% of patients. Reduced fructose and zinc seminal markers were found in 33%, including two patients with azoospermia who underwent successful surgical sperm retrieval. Histology identified fully preserved spermatogenesis in the centre of their testes, but also tubular atrophy and lysosomal overload in Sertoli and Leydig cells of the testicular periphery. LIMITATIONS, REASONS FOR CAUTION Limitations of this study are the small number of assessed patients and the heterogeneity of their dysfunction in cystine transport across lysosomal membranes. WIDER IMPLICATIONS OF THE FINDINGS This study suggests that testicular degeneration in cystinosis results from the lysosomal overload of Sertoli and Leydig cells of the testicular periphery, and that this can possibly be delayed, but not prevented, by good adherence to cysteamine treatment. Endocrine testicular function in INC may remain compensated until the fourth decade of life; however, azoospermia may occur during adolescence. Cryostorage of semen could be an option for approximately 20% of young males with INC, with surgical sperm retrieval providing additional opportunities for biological fatherhood. STUDY FUNDING/COMPETING INTEREST(S) This work was supported by the Cystinosis Foundation Germany. The authors have no competing interests to declare. TRIAL REGISTRATION NUMBER n/a.
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Affiliation(s)
- J Rohayem
- Centre of Reproductive Medicine and Andrology, Department of Clinical and Surgical Andrology, University of Münster, Albert-Schweizer-Campus 1, D 11, 48149 Münster, Germany
| | - D Haffner
- Department of Pediatric Kidney, Liver and Metabolic Diseases, Children's Hospital, Hannover Medical School, Carl-Neuberg-Straße 1, 30625 Hannover, Germany
| | - J F Cremers
- Centre of Reproductive Medicine and Andrology, Department of Clinical and Surgical Andrology, University of Münster, Albert-Schweizer-Campus 1, D 11, 48149 Münster, Germany
| | - S Huss
- Institute for Pathology, University of Münster, Münster, Germany
| | - J Wistuba
- Centre of Reproductive Medicine and Andrology, Institute of Reproductive and Regenerative Biology, University of Münster, Albert-Schweizer-Campus 1, D 11, 48149 Münster, Germany
| | - D Weitzel
- Department of Pediatric Nephrology, Children's Hospital, RoMed Clinics Rosenheim, Pettenkoferstr. 10 83022 Rosenheim, Germany
| | - S Kliesch
- Centre of Reproductive Medicine and Andrology, Department of Clinical and Surgical Andrology, University of Münster, Albert-Schweizer-Campus 1, D 11, 48149 Münster, Germany
| | - K Hohenfellner
- Department of Pediatric Nephrology, Children's Hospital, RoMed Clinics Rosenheim, Pettenkoferstr. 10 83022 Rosenheim, Germany
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Marcucci G, Masi L, Ferrarì S, Haffner D, Javaid MK, Kamenický P, Reginster JY, Rizzoli R, Brandi ML. Phosphate wasting disorders in adults. Osteoporos Int 2018; 29:2369-2387. [PMID: 30014155 DOI: 10.1007/s00198-018-4618-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [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: 03/22/2018] [Accepted: 06/19/2018] [Indexed: 12/14/2022]
Abstract
A cause of hypophosphatemia is phosphate wasting disorders. Knowledge concerning mechanisms involved in phosphate wasting disorders has greatly increased in the last decade by the identification of phosphatonins, among them FGF-23. FGF-23 is a primarily bone derived factor decreasing renal tubular reabsorption of phosphate and the synthesis of calcitriol. Currently, pharmacological treatment of these disorders offers limited efficacy and is potentially associated to gastrointestinal, renal, and parathyroid complications; therefore, efforts have been directed toward newer pharmacological strategies that target the FGF-23 pathway. This review focuses on phosphate metabolism, its main regulators, and phosphate wasting disorders in adults, highlighting the main issues related to diagnosis and current and new potential treatments.
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Affiliation(s)
- G Marcucci
- Metabolic Bone Diseases Unit, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy
| | - L Masi
- Metabolic Bone Diseases Unit, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy
| | - S Ferrarì
- Division of Bone Diseases, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland
| | - D Haffner
- Department of Pediatric Kidney, Liver and Metabolic Diseases, Hannover Medical School, Hannover, Germany
| | - M K Javaid
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - P Kamenický
- Service d'Endocrinologie et des Maladies de la Reproduction, Centre de référence des Maladies Rares du métabolisme du calcium et du phosphore, Hopital de Bicêtre - AP-HP, 94275, Le Kremlin-Bicêtre, France
| | - J-Y Reginster
- Department of Public Health, Epidemiology and Health Economics, University of Liège, Liège, Belgium
| | - R Rizzoli
- Division of Bone Diseases, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland
| | - M L Brandi
- Metabolic Bone Diseases Unit, Department of Surgery and Translational Medicine, University of Florence, Florence, Italy.
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Schenkeveld VME, Jaross G, Marchenko S, Haffner D, Kleipool QL, Rozemeijer NC, Veefkind JP, Levelt PF. In-flight performance of the Ozone Monitoring Instrument. Atmos Meas Tech 2017; 10:1957-1986. [PMID: 29657582 PMCID: PMC5893161 DOI: 10.5194/amt-2016-420] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The Dutch-Finnish Ozone Monitoring Instrument (OMI) is an imaging spectrograph flying on NASA's EOS Aura satellite since July 15, 2004. OMI is primarily used to map trace gas concentrations in the Earth's atmosphere, obtaining mid-resolution (0.4-0.6 nm) UV-VIS (264-504 nm) spectra at multiple (30-60) simultaneous fields of view. Assessed via various approaches that include monitoring of radiances from selected ocean, land, ice and cloud areas, as well as measurements of line profiles in the Solar spectra, the instrument shows low optical degradation and high wavelength stability over the mission lifetime. In the regions relatively free from the slowly unraveling 'row anomaly' the OMI irradiances have degraded by 3-8%, while radiances have changed by 1-2%. The long-term wavelength calibration of the instrument remains stable to 0.005-0.020 nm.
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Affiliation(s)
| | - Glen Jaross
- NASA Goddard Space Flight Center, Greenbelt, Maryland
| | | | - David Haffner
- Science Systems and Applications Inc., Lanham, Maryland
| | - Quintus L Kleipool
- Royal Netherlands Meteorological Institute KNMI, De Bilt, The Netherlands
| | | | - J Pepijn Veefkind
- Royal Netherlands Meteorological Institute KNMI, De Bilt, The Netherlands
- Delft University of Technology, Delft, The Netherlands
| | - Pieternel F Levelt
- Royal Netherlands Meteorological Institute KNMI, De Bilt, The Netherlands
- Delft University of Technology, Delft, The Netherlands
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Zaatreh S, Haffner D, Strauß M, Wegner K, Warkentin M, Lurtz C, Zamponi C, Mittelmeier W, Kreikemeyer B, Willumeit-Römer R, Quandt E, Bader R. Fast corroding, thin magnesium coating displays antibacterial effects and low cytotoxicity. Biofouling 2017; 33:294-305. [PMID: 28349700 DOI: 10.1080/08927014.2017.1303832] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 03/03/2017] [Indexed: 06/06/2023]
Abstract
Bacterial colonisation and biofilm formation are characteristics of implant-associated infections. In search of candidates for improved prosthetic materials, fast corroding Mg-based coatings on titanium surfaces were examined for their cytotoxic and antimicrobial properties. Human osteoblasts and Staphylococcus epidermidis were each cultured on cylindrical Ti samples coated with a thin layer of Mg/Mg45Zn5Ca, applied via magnetron sputtering. Uncoated titanium samples served as controls. S. epidermidis was quantified by counting colony forming units. The biofilm-bound fraction was isolated via ultrasonic treatment, and the planktonic fraction via centrifugation. Biofilm-bound S. epidermidis was significantly decreased by approximately four to five orders of magnitude in both Mg- and Mg45Zn5Ca-coated samples after seven days compared to the control. The osteoblast viability was within the tolerance threshold of 70% stated in DIN EN ISO 10993-5:2009-10 for Mg (~80%) but not for Mg45Zn5Ca (~25%). Accordingly, Mg-coated titanium was identified as a promising candidate for an implant material with antibacterial properties and low cytotoxicity levels. The approach of exploiting fast corrosion contrasts with existing methods, which have generally focused on reducing corrosion.
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Affiliation(s)
- Sarah Zaatreh
- a Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics , University Medicine Rostock , Rostock , Germany
| | - David Haffner
- b Inorganic Functional Materials, Institute of Materials Science, Faculty of Engineering , Kiel University , Kiel , Germany
| | - Madlen Strauß
- a Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics , University Medicine Rostock , Rostock , Germany
| | - Katharina Wegner
- a Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics , University Medicine Rostock , Rostock , Germany
| | - Mareike Warkentin
- c Faculty of Mechanical Engineering and Marine Technology, Department of Material Science and Medical Engineering , University of Rostock , Rostock , Germany
| | - Claudia Lurtz
- c Faculty of Mechanical Engineering and Marine Technology, Department of Material Science and Medical Engineering , University of Rostock , Rostock , Germany
| | - Christiane Zamponi
- b Inorganic Functional Materials, Institute of Materials Science, Faculty of Engineering , Kiel University , Kiel , Germany
| | - Wolfram Mittelmeier
- a Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics , University Medicine Rostock , Rostock , Germany
| | - Bernd Kreikemeyer
- d Institute of Medical Microbiology, Virology and Hygiene , University Medicine Rostock , Rostock , Germany
| | - Regine Willumeit-Römer
- e Institute of Materials Research, Division Metallic Biomaterials , Helmholtz-Zentrum Geesthacht , Geesthacht , Germany
| | - Eckhard Quandt
- b Inorganic Functional Materials, Institute of Materials Science, Faculty of Engineering , Kiel University , Kiel , Germany
| | - Rainer Bader
- a Biomechanics and Implant Technology Research Laboratory, Department of Orthopedics , University Medicine Rostock , Rostock , Germany
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Zaatreh S, Haffner D, Strauss M, Dauben T, Zamponi C, Mittelmeier W, Quandt E, Kreikemeyer B, Bader R. Thin magnesium layer confirmed as an antibacterial and biocompatible implant coating in a co‑culture model. Mol Med Rep 2017; 15:1624-1630. [PMID: 28260022 PMCID: PMC5365004 DOI: 10.3892/mmr.2017.6218] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 11/21/2016] [Indexed: 12/19/2022] Open
Abstract
Implant-associated infections commonly result from biofilm-forming bacteria and present severe complications in total joint arthroplasty. Therefore, there is a requirement for the development of biocompatible implant surfaces that prevent bacterial biofilm formation. The present study coated titanium samples with a thin, rapidly corroding layer of magnesium, which were subsequently investigated with respect to their antibacterial and cytotoxic surface properties using a Staphylococcus epidermidis (S. epidermidis) and human osteoblast (hOB) co-culture model. Primary hOBs and S. epidermidis were co-cultured on cylindrical titanium samples (Ti6Al4V) coated with pure magnesium via magnetron sputtering (5 µm thickness) for 7 days. Uncoated titanium test samples served as controls. Vital hOBs were identified by trypan blue staining at days 2 and 7. Planktonic S. epidermidis were quantified by counting the number of colony forming units (CFU). The quantification of biofilm-bound S. epidermidis on the surfaces of test samples was performed by ultrasonic treatment and CFU counting at days 2 and 7. The number of planktonic and biofilm-bound S. epidermidis on the magnesium-coated samples decreased by four orders of magnitude when compared with the titanium control following 7 days of co-culture. The number of vital hOBs on the magnesium-coated samples was observed to increase (40,000 cells/ml) when compared with the controls (20,000 cells/ml). The results of the present study indicate that rapidly corroding magnesium-coated titanium may be a viable coating material that possesses antibacterial and biocompatible properties. A co-culture test is more rigorous than a monoculture study, as it accounts for confounding effects and assesses additional interactions that are more representative of in vivo situations. These results provide a foundation for the future testing of this type of surface in animals.
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Affiliation(s)
- Sarah Zaatreh
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University Medicine Rostock, D‑18057 Rostock, Germany
| | - David Haffner
- Institute for Materials Science, Faculty of Engineering, University of Kiel, D‑24143 Kiel, Germany
| | - Madlen Strauss
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University Medicine Rostock, D‑18057 Rostock, Germany
| | - Thomas Dauben
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University Medicine Rostock, D‑18057 Rostock, Germany
| | - Christiane Zamponi
- Institute for Materials Science, Faculty of Engineering, University of Kiel, D‑24143 Kiel, Germany
| | - Wolfram Mittelmeier
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University Medicine Rostock, D‑18057 Rostock, Germany
| | - Eckhard Quandt
- Institute for Materials Science, Faculty of Engineering, University of Kiel, D‑24143 Kiel, Germany
| | - Bernd Kreikemeyer
- Institute of Medical Microbiology, Virology and Hygiene, University Medicine Rostock, D‑18057 Rostock, Germany
| | - Rainer Bader
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University Medicine Rostock, D‑18057 Rostock, Germany
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Schenkeveld VME, Jaross G, Marchenko S, Haffner D, Kleipool QL, Rozemeijer NC, Veefkind JP, Levelt PF. In-flight performance of the Ozone Monitoring Instrument. Atmos Meas Tech 2017; 10:1957-1986. [PMID: 29657582 DOI: 10.5194/amt-10-1957-2017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The Dutch-Finnish Ozone Monitoring Instrument (OMI) is an imaging spectrograph flying on NASA's EOS Aura satellite since July 15, 2004. OMI is primarily used to map trace gas concentrations in the Earth's atmosphere, obtaining mid-resolution (0.4-0.6 nm) UV-VIS (264-504 nm) spectra at multiple (30-60) simultaneous fields of view. Assessed via various approaches that include monitoring of radiances from selected ocean, land, ice and cloud areas, as well as measurements of line profiles in the Solar spectra, the instrument shows low optical degradation and high wavelength stability over the mission lifetime. In the regions relatively free from the slowly unraveling 'row anomaly' the OMI irradiances have degraded by 3-8%, while radiances have changed by 1-2%. The long-term wavelength calibration of the instrument remains stable to 0.005-0.020 nm.
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Affiliation(s)
| | - Glen Jaross
- NASA Goddard Space Flight Center, Greenbelt, Maryland
| | | | - David Haffner
- Science Systems and Applications Inc., Lanham, Maryland
| | - Quintus L Kleipool
- Royal Netherlands Meteorological Institute KNMI, De Bilt, The Netherlands
| | | | - J Pepijn Veefkind
- Royal Netherlands Meteorological Institute KNMI, De Bilt, The Netherlands
- Delft University of Technology, Delft, The Netherlands
| | - Pieternel F Levelt
- Royal Netherlands Meteorological Institute KNMI, De Bilt, The Netherlands
- Delft University of Technology, Delft, The Netherlands
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9
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Zaatreh S, Haffner D, Pasold J, Kreikemeyer B, Mittelmeier W, Podbielski A, Quandt E, Bader R. Track A. Biomaterials and Biocompatibility 1. ACTA ACUST UNITED AC 2016; 60 Suppl 1:S1-30. [PMID: 26360467 DOI: 10.1515/bmt-2015-5000] [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: 11/15/2022]
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Schreiver C, Jacoby U, Watzer B, Thomas A, Haffner D, Fischer DC. Glycaemic variability in paediatric patients with type 1 diabetes on continuous subcutaneous insulin infusion (CSII) or multiple daily injections (MDI): a cross-sectional cohort study. Clin Endocrinol (Oxf) 2013; 79:641-7. [PMID: 23134485 DOI: 10.1111/cen.12093] [Citation(s) in RCA: 17] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Revised: 10/16/2012] [Accepted: 11/01/2012] [Indexed: 11/30/2022]
Abstract
OBJECTIVE This cross-sectional observational cohort study was designed to investigate i) whether glycaemic variability in paediatric patients with type 1 diabetes is lower in those using an insulin pump (CSII) compared with those using multiple daily insulin injections (MDI) and ii) whether urinary F2 -isoprostanes and/or urinary prostaglandin F2 excretion as surrogate marker of oxidative stress and cyclooxygenase activity are associated with glycaemic variability. METHODS 48 paediatric patients with type 1 diabetes (22 using an insulin pump) underwent an ambulatory 3-day continuous glucose monitoring. All patients continued with normal daily activities and collected urine for two consecutive 24 h periods. The glucose pentagon was used to calculate the glycaemic risk parameter. RESULTS Insulin requirements, HDL-cholesterol, the mean of glycaemic excursions (P < 0·01) and the standard deviation of mean glucose concentration (P < 0·05) were significantly lower in patients with CSII compared with those using MDI. By contrast, averaged HbA1c during the last twelve months as well as at the time of sensor insertion did not differ significantly between both groups. Summarizing characteristic parameter of acute and long-term metabolic control into the glucose pentagon revealed a significantly lower glycaemic risk parameter in CSI patients compared with both, healthy subjects and patients using MDI (P < 0·05). CONCLUSIONS Paediatric patients with type 1 diabetes using an insulin pump presented with lower glycaemic variability and a concomitantly lower glycaemic risk parameter compared with those using MDII. Whether these findings translate into a lower risk of diabetes associated cardiovascular complications remains to be elucidated.
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Affiliation(s)
- C Schreiver
- Department of Paediatrics, University Hospital Rostock, Hannover, Germany
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Bahler CK, Hann CR, Fjield T, Haffner D, Heitzmann H, Fautsch MP. Second-generation trabecular meshwork bypass stent (iStent inject) increases outflow facility in cultured human anterior segments. Am J Ophthalmol 2012; 153:1206-13. [PMID: 22464365 DOI: 10.1016/j.ajo.2011.12.017] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Revised: 12/28/2011] [Accepted: 12/29/2011] [Indexed: 11/26/2022]
Abstract
PURPOSE To determine whether a second-generation trabecular meshwork (TM) bypass stent (iStent inject) influences outflow facility in cultured human anterior segments. DESIGN Prospective laboratory investigation using normal human donor eyes. METHODS Human anterior segments (n = 7) were placed in perfusion organ culture. One or 2 iStent inject stents were inserted into the TM within the nasal and/or superior quadrants using a specially designed injector. Anterior segments were returned to culture and perfused for an additional 24 hours. Morphology of the TM and Schlemm canal (SC) was assessed by scanning electron microscopy (SEM) and 3-dimensional micro-computed tomography (3D micro-CT). RESULTS Insertion of 1 iStent inject into the nasal or superior quadrant of the TM increased outflow facility from 0.16 ± 0.05 μL/min/mm Hg to 0.38 ± 0.23 μL/min/mm Hg (P < .03, n = 7), with concurrent pressure reduction from 16.7 ± 5.4 mm Hg to 8.6 ± 4.4 mm Hg. Addition of a second iStent inject further increased outflow facility to 0.78 ± 0.66 μL/min/mm Hg (n = 2). SEM showed the iStent inject flange compressed against the uveal region of the TM, the thorax securely inserted within the TM, and the head located in the lumen of SC. Dilation of SC was noted around the iStent inject head and SC cell disruption was observed at the iStent inject insertion site. 3D micro-CT confirmed iStent inject placement. CONCLUSION iStent inject, a second-generation bypass stent, increased outflow facility in human anterior segment culture. The iStent inject is a promising new device to lower intraocular pressure via TM bypass.
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Schreiver C, Jacoby U, Fischer DC, Haffner D. Glykämische Variabilität bei Kindern und Jugendlichen mit Diabetes mellitus Typ 1 unter intensivierter konventioneller Insulintherapie oder kontinuierlicher subkutaner Insulininfusion. DIABETOL STOFFWECHS 2012. [DOI: 10.1055/s-0032-1314588] [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: 10/28/2022]
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Živičnjak M, Schnabel D, Staude H, Even G, Marx M, Beetz R, Holder M, Billing H, Fischer DC, Rabl W, Schumacher M, Hiort O, Haffner D. Three-year growth hormone treatment in short children with X-linked hypophosphatemic rickets: effects on linear growth and body disproportion. J Clin Endocrinol Metab 2011; 96:E2097-105. [PMID: 21994957 DOI: 10.1210/jc.2011-0399] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [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] [Indexed: 11/19/2022]
Abstract
CONTEXT Children with X-linked hypophosphatemic rickets (XLH) are prone to progressive disproportionate stunting despite oral phosphate and vitamin D treatment. OBJECTIVE Our objective was to analyze the effects of GH treatment on stature and lengths of linear body segments in short children with XLH. DESIGN, SETTINGS, AND PATIENTS A 3-yr randomized controlled open-label GH study in short prepubertal children with XLH (n = 16) on phosphate and calcitriol treatment was conducted. A cohort of XLH patients (n = 76) on conservative treatment served as an XLH reference population. MAIN OUTCOME MEASURES Changes in SD scores (SDS) of stature and linear body segments, i.e. sitting height, leg and arm length, and sitting height index (i.e. ratio between sitting height and stature) were the main outcome measures. RESULTS XLH patients presented at time of enrollment with significant impairments of stature (-3.3 SDS) and linear body segments compared with healthy children. Leg length (-3.8 SDS) was most impaired, whereas sitting height (-1.7 SDS) was best preserved. The markedly elevated mean sitting height index (+3.3 SDS) reflected severe body disproportion. GH resulted in a sustained increase in linear growth (stature, +1.1 SDS; sitting height, +1.3 SDS; leg length, +0.8 SDS; arm length, +1.1 SDS; each P < 0.05 vs. baseline), whereas no significant changes were observed in controls. Mean height SDS at 3 yr did not significantly differ between groups. Sitting height index remained stable in both the GH-treated patients and in study controls but increased further in the XLH-reference population. CONCLUSIONS The 3-yr GH treatment improved linear growth without progression of body disproportion in short children with XLH.
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Affiliation(s)
- M Živičnjak
- Department of Pediatric Kidney, Liver, and Metabolic Diseases, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany.
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Stuhldreier G, Haffner D, Prall F, Vorwerk P, Classen CF. Appendiceal neuroendocrine carcinoma sized 18 mm with metastasis in one of 36 lymph nodes. Eur J Pediatr Surg 2011; 21:400-2. [PMID: 21842463 DOI: 10.1055/s-0031-1283152] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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: 10/17/2022]
Affiliation(s)
- G Stuhldreier
- University of Rostock, Pediatric Surgery, Rostock, Germany
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Glasenapp S, Klaunick G, Stuhldreier G, Lohse P, Wigger M, Haffner D. A case of Familial Mediterranean Fever at the Baltic Sea. Acta Paediatr 2011; 100:e49-50. [PMID: 21535129 DOI: 10.1111/j.1651-2227.2011.02339.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Jacoby U, Staude H, Drückler E, Haffner D, Wigger M, Erbersdobler A. Akutes Nierenversagen bei Hanta-Virus Infektion. Klin Padiatr 2011. [DOI: 10.1055/s-0031-1273879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Staude H, Drückler E, Jacoby U, Hakenberg O, Koball S, Erbersdobler A, Haffner D, Wigger M. AB0-inkompatible Nierentransplantation bei einer jugendlichen Patientin. Klin Padiatr 2011. [DOI: 10.1055/s-0031-1273858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Staude H, Drückler E, Jacoby U, Haffner D, Wigger M. Behandlung des sekundären Hyperparathyreoidismus bei Kindern und Jugendlichen mit chronischer Niereninsuffizienz: erste Langzeitergebnisse. Klin Padiatr 2011. [DOI: 10.1055/s-0031-1273843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Haffner D, Fischer DC. Bone cell biology and pediatric renal osteodystrophy. Minerva Pediatr 2010; 62:273-284. [PMID: 20467380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Patients with chronic kidney disease (CKD) show a broad spectrum of clinical symptoms intimately related to the disturbed mineral and bone metabolism and summarized as CKD-mineral-bone disorder (CKD-MBD). Whereas in adults an impaired bone metabolism translates mainly into an increased risk of fractures, in pediatric CKD patients rickets, skeletal deformations, and severe growth failure are additional and severe clinical findings. Further-more, an elevated Ca x P ion product, secondary hyperparathyroidism (sHPT) as well as concomitant calcitriol medication have been linked to ectopic (vascular) calcification, in which is strongly associated with the dramatically high cardiovascular morbidity and mortality even in pediatric CKD patients. Thus, in these patients the impaired mineral metabolism is the link between skeletal and cardiovascular disease. In other words, the complex interplay between kidney, skeleton, parathyroid gland, the intestine and the cardiovasculature is severely disturbed in CKD. This review summarizes the recent findings in our understanding of bone cell biology and alterations of mineral metabolism in children with CKD.
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Affiliation(s)
- D Haffner
- Department of Pediatrics, University of Rostock, Rostock, Germany.
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Nürnberg W, Breuel K, Haffner D. Vorsorge- und Rehabilitationsmaßnahmen für Kinder und Jugendliche. Monatsschr Kinderheilkd 2010. [DOI: 10.1007/s00112-009-2066-y] [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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Walther F, Uhlemann M, Seidlitz G, Höhn R, Peuster M, Haffner D. Therapeutisches Vorgehen bei Ahornsirupkrankheit – Stellenwert der Hämodialyse in der Behandlung der Ahornsirupkrankheit. Z Geburtshilfe Neonatol 2009. [DOI: 10.1055/s-0029-1223046] [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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Fischer DC, Jacoby U, Pape L, Ward CJ, Kuwertz-Broeking E, Renken C, Nizze H, Querfeld U, Rudolph B, Mueller-Wiefel DE, Bergmann C, Haffner D. Activation of the AKT/mTOR pathway in autosomal recessive polycystic kidney disease (ARPKD). Nephrol Dial Transplant 2009; 24:1819-27. [DOI: 10.1093/ndt/gfn744] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [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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Guildford SJ, Muir DCG, Houde M, Evans MS, Kidd KA, Whittle DM, Drouillard K, Wang X, Anderson MR, Bronte CR, Devault DS, Haffner D, Payne J, Kling HJ. PCB concentrations in lake trout (Salvelinus namaycush) are correlated to habitat use and lake characteristics. Environ Sci Technol 2008; 42:8239-8244. [PMID: 19068800 DOI: 10.1021/es801218m] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This study considers the importance of lake trout habitat as a factor determining persistent organochlorine (OC) concentration. Lake trout is a stenothermal, cold water species and sensitive to hypoxia. Thus, factors such as lake depth, thermal stratification, and phosphorus enrichment may determine not only which lakes can support lake trout but may also influence among-lake variability in lake trout population characteristics including bioaccumulation of OCs. A survey of 23 lakes spanning much of the natural latitudinal distribution of lake trout provided a range of lake trout habitat to test the hypothesis that lake trout with greater access to littoral habitat for feeding will have lower concentrations of OCs than lake trout that are more restricted to pelagic habitat. Using the delta13C stable isotope signature in lake trout as an indicator of influence of benthic littoral feeding, we found a negative correlation between lipid-corrected delta13C and sigmaPCB concentrations supporting the hypothesis that increasing accessto littoral habitat results in lower OCs in lake trout. The prominence of mixotrophic phytoplankton in lakes with more contaminated lake trout indicated the pelagic microbial food web may exacerbate the biomagnification of OCs when lake trout are restricted to pelagic feeding. A model that predicted sigmaPCB in lake trout based on lake area and latitude (used as proximate variables for proportion of littoral versus pelagic habitat and accessibility to littoral habitat respectively) explained 73% of the variability in sigmaPCBs in lake trout in the 23 lakes surveyed.
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Affiliation(s)
- S J Guildford
- Department of Biology and Large Lakes Observatory, University of Minnesota-Duluth, 2205 Fifth Street, Duluth, Minnesota 55812, USA.
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Abstract
UNLABELLED Growth hormone (GH) has been used for treatment of impaired growth in children with chronic kidney disease (CKD) for nearly 17 years. Controlled and open-label studies have shown that GH is highly effective in improving growth velocity and adult height. The growth response is negatively correlated with age and height at start and time spent on dialysis treatment; it is positively correlated with dose and duration of treatment and the primary renal disease (renal hypodysplasia). In children with renal transplants, corticosteroid treatment is an additional factor negatively influencing spontaneous growth rates. However, GH treatment is able to compensate corticosteroid-induced growth failure. GH treatment improved final height by 0.5-1.7 standard deviation score (SDS) in various studies, whereas the control group lost about 0.5 SDS in comparable time intervals. These variable results are explained in part by the factors mentioned above. The adverse events are comparable to those in non-CKD children treated with GH. CONCLUSION GH treatment is safe and highly effective in improving growth and final height of short children with all stages of CKD. The highest treatment success is obtained if treatment is started at an early age and with relatively well-preserved residual renal function and continued until final height.
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Affiliation(s)
- O Mehls
- Division of Pediatric Nephrology, University Hospital of Pediatric and Adolescent Medicine, Heidelberg, Germany.
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Haffner D. Nierenbeteiligung beim systemischen Lupus erythematodes im Kindes- und Jugendalter. AKTUEL RHEUMATOL 2008. [DOI: 10.1055/s-2008-1027533] [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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Abstract
OBJECTIVE In this study, heat-killed Lactobacillus johnsonii (La1), doubly labelled with (13)C and (15)N (hk-dlLa1), was used to follow the metabolic fate after oral administration in humans. DESIGN Experimental study. SETTING University of Rostock, Children's Hospital, Research Laboratory. SUBJECTS Ten healthy adults aged 23-26 years. INTERVENTION The subjects received 74.6 mg/kg body weight hk-dlLa1 and 10 g alpha-D-raffinose together with breakfast. A sample of venous blood was taken after 2 h. Expired air samples were taken over 14 h, whereas urine and faeces were collected over a period of 48 h. (13)C- and (15)N-enrichments were measured by isotope ratio mass spectrometry. Hydrogen concentrations were measured by electrochemical detection. RESULTS The orocaecal transit time (OCTT) was reached after 3.4 h. After 2 h, (13)C- and (15)N-enrichment of fibrinogen amounted to 2 and 25 p.p.m. excess, respectively. The (13)CO(2)-exhalation amounted to 9.2% of the ingested dose. The urinary excretion of (13)C and (15)N was 2.1 and 10.4% of the ingested dose, respectively, whereas the faecal excretion was 47.9 and 43.7% of the ingested dose, respectively. CONCLUSIONS In comparison to OCTT of 3.4 h, both stable isotopes appear after 30 min in breath and urine, indicating that hk-dlLa1 is rapidly digested in the small bowel before reaching the caecum. This is confirmed by (13)C-and (15)N-enrichments of blood plasma fractions. The ingestion of hk-dlLa1 led to a (13)C- and (15)N-excretion of 59.2 and 54.1% of the ingested dose, respectively, of both stable isotopes.
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Affiliation(s)
- K D Wutzke
- Research Laboratory 'Gastroenterology and Nutrition', Children's Hospital, University of Rostock, Rostock, Germany.
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Querfeld U, Haffner D. Reply. Nephrol Dial Transplant 2007. [DOI: 10.1093/ndt/gfl693] [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: 11/13/2022] Open
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Uhlemann M, Evert S, Bolz M, Briese V, Külz T, Plath C, Haffner D. Outcome bei Kindern mit fetofetalem Transfusionssyndrom –2 Fallberichte. Z Geburtshilfe Neonatol 2007. [DOI: 10.1055/s-2007-983252] [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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Evert S, Popp K, Olbertz D, Hauenstein C, Uhlemann M, Haffner D. Hypoxisch-ischämische Enzephalopathie–Zwei Verlaufsbeobachtungen. Z Geburtshilfe Neonatol 2007. [DOI: 10.1055/s-2007-1002932] [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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Verberckmoes SC, Persy V, Behets GJ, Neven E, Hufkens A, Zebger-Gong H, Müller D, Haffner D, Querfeld U, Bohic S, De Broe ME, D'Haese PC. Uremia-related vascular calcification: more than apatite deposition. Kidney Int 2006; 71:298-303. [PMID: 17149373 DOI: 10.1038/sj.ki.5002028] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In the present study, we characterized and compared the mineral phase deposited in the aortic wall of two different frequently used chronic renal failure rat models of vascular calcification. Vascular calcification was induced in rats by either a 4-week adenine treatment followed by a 10-week high-phosphate diet or 5/6 nephrectomy followed by 6 weeks of 0.25 microg/kg/day calcitriol treatment and a high-phosphate diet. Multi-element mapping for calcium and phosphate together with mineral identification was performed on several regions of aortic sections by means of synchrotron X-ray-mu-fluorescence and diffraction. Bulk calcium and magnesium content of the aorta was assessed using flame atomic absorption spectrometry. Based on the diffraction data the Von Kossa-positive precipitate in the aortic regions (N=38) could be classified into three groups: (1) amorphous precipitate (absence of any diffraction peak pattern, N=12); (2) apatite (N=16); (3) a combination of apatite and magnesium-containing whitlockite (N=10). The occurrence of these precipitates differed significantly between the two models. Furthermore, the combination of apatite and whitlockite was exclusively found in the calcitriol-treated animals. These data indicate that in adenine/phosphate-induced uremia-related vascular calcification, apatite is the main component of the mineral phase. The presence of magnesium-containing whitlockite found in addition to apatite in the vitamin D-treated rats, has to be seen in view of the well-known vitamin D-stimulated gastrointestinal absorption of magnesium.
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Affiliation(s)
- S C Verberckmoes
- Laboratory of Physiopathology, University of Antwerp, Antwerp, Belgium
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Spang C, Zimmermann B, Lenschow U, Hobusch D, Haffner D. Perakute Meningokokkensepsis im Kindesalter – Diagnostik und Therapie; Ergebnisse der Kinderklinik Rostock; 1994–2005. Z Geburtshilfe Neonatol 2006. [DOI: 10.1055/s-2006-946045] [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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Spang C, Hauenstein C, Zimmermann B, Diehl T, Stuhldreier G, Haffner D. Kongenitales mesenchymales Hamartom der Thoraxwand. Z Geburtshilfe Neonatol 2006. [DOI: 10.1055/s-2006-946140] [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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Spang C, Zimmermann B, Hauenstein C, Meyer A, Diehl T, Lenschow U, Haffner D. Intoxikation eines Calciumantagonisten, Amlodipin. Z Geburtshilfe Neonatol 2006. [DOI: 10.1055/s-2006-946134] [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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Diehl T, Hauenstein C, Spang C, Zimmermann B, Meyer A, Flägel HJ, Haffner D. Schwere Hydranencephalie mit respiratorischer Insuffizienz – ein postnatales ethisches Dilemma. Z Geburtshilfe Neonatol 2006. [DOI: 10.1055/s-2006-946177] [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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Diehl T, Hauenstein C, Spang C, Zimmermann B, Meyer A, Flägel HJ, Haffner D. Schwere Hydranencephalie mit respiratorischer Insuffizienz – ein postnatales ethisches Dilemma. Z Geburtshilfe Neonatol 2006. [DOI: 10.1055/s-2006-943262] [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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Spang C, Zimmermann B, Lenschow U, Hobusch D, Haffner D. Perakute Meningokokkensepsis im Kindesalter – Diagnostik und Therapie; Ergebnisse der Kinderklinik Rostock; 1994–2005. Z Geburtshilfe Neonatol 2006. [DOI: 10.1055/s-2006-943130] [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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Spang C, Hauenstein C, Zimmermann B, Diehl T, Stuhldreier G, Haffner D. Kongenitales mesenchymales Hamartom der Thoraxwand. Z Geburtshilfe Neonatol 2006. [DOI: 10.1055/s-2006-943225] [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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Spang C, Zimmermann B, Hauenstein C, Meyer A, Diehl T, Lenschow U, Haffner D. Intoxikation eines Calciumantagonisten, Amlodipin. Z Geburtshilfe Neonatol 2006. [DOI: 10.1055/s-2006-943219] [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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Kallinich T, Haffner D, Rudolph B, Schindler R, Canaan-Kühl S, Keitzer R, Burmester GR, Roesen-Wolff A, Roesler J. "Periodic fever" without fever: two cases of non-febrile TRAPS with mutations in the TNFRSF1A gene presenting with episodes of inflammation or monosymptomatic amyloidosis. Ann Rheum Dis 2005; 65:958-60. [PMID: 16308343 PMCID: PMC1798226 DOI: 10.1136/ard.2005.043570] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Tumour necrosis factor (TNF) receptor associated periodic syndrome (TRAPS) is caused by dominant mutations in the TNFRSF1A gene. In typical cases TRAPS begins early in childhood and is characterised by high and remittent fever over a period of 1-4 weeks or longer, accompanied by systemic and local inflammation. CASE REPORTS Patient 1 presented with recurrent episodes of weakness, migrating myalgias, arthralgias, exanthema, and chest pain lasting for 1-4 weeks, but without any fever over an initial period of 4 years at least. Diagnosis of TRAPS was confirmed by the heterozygous mutation Y20H in TNFRSF1A. Patient 2, a 23 year old woman never had any symptoms indicative of TRAPS. Genetic evaluation of all members of her family with a TRAPS index patient disclosed the T50M mutation in TNFRSF1A. A medical check up showed proteinuria, and renal biopsy disclosed AA amyloidosis. CONCLUSIONS TRAPS associated mutations can induce considerable inflammation that is not necessarily accompanied by fever. Even monosymptomatic severe amyloidosis can occur in these patients. Genetic counselling and appropriate management to prevent or mitigate amyloidosis may be necessary.
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Affiliation(s)
- T Kallinich
- Department of Paediatric Pulmonology and Immunology, Charité Campus Virchow-Klinikum, Universitaetsmedizin Berlin, Germany
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Spang C, Warncke G, Lenschow U, Tiefenbach B, Walther F, Stolpe H, Plath C, Haffner D, Zimmermann B, Wigger M. Extrakorporale Detoxikation mittels Hämoperfusion bei schwerer Carbamazepin-Intoxikation bei einem 9-jährigen Kind. Z Geburtshilfe Neonatol 2005. [DOI: 10.1055/s-2005-871493] [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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Spang C, Mühlig-Hofmann A, Jakoby U, Breuel K, Stuhldreier G, Uhlemann U, Plath C, Haffner D, Zimmermann B. Mittellappenresektion bei einer Pleuropneumonie. Z Geburtshilfe Neonatol 2005. [DOI: 10.1055/s-2005-871489] [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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Mühlig-Hofmann A, Krüger G, Zimmermann B, Jacoby U, Plath C, Haffner D, Warzok R, Spang C. Seltene Differentialdiagnose bei „floppy-infant“ – Myotubuläre (Zentronukleäre) Myopathie. Z Geburtshilfe Neonatol 2005. [DOI: 10.1055/s-2005-871487] [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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Abstract
Rickets is caused by deficient mineralization at the level of growth plate and is usually due to a decreased serum calcium/phosphate product. Although the diagnosis of rickets can usually be suspected on the basis of a clinical examination (bone deformities in legs, impaired growth), radiological examination and detailed biochemical work-up are necessary to elucidate the etiology of the underlying disease. It is important to differentiate between calcipenic/vitamin deficient and phosphopenic rickets. The former is due to vitamin D deficiency, and the ultimate cause of this usually lies in altered vitamin D supply; however, impaired synthesis of or resistance to the actions of vitamin D can also be a cause. Phosphopenic rickets is usually related to impaired phosphate reabsorption in the proximal renal tubule. Both calcipenic and phosphopenic rickets can be acquired or hereditary in origin.
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Affiliation(s)
- D Schnabel
- Pädiatrische Endokrinologie und Diabetologie, Otto-Huebner-Centrum für Kinder- und Jugendmedizin, Charité, CVK--Universitätsmedizin Berlin.
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Kallinich T, Briese S, Roesler J, Rudolph B, Keitzer R, Querfeld U, Haffner D. Two familial cases with TRAPS caused by a non-cystein mutation in the TNFRSF1A gene associated with severe multiorganic amyloidosis. AKTUEL RHEUMATOL 2003. [DOI: 10.1055/s-2003-45080] [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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Krohn K, Haffner D, Hügel U, Himmele R, Klaus G, Mehls O, Schaefer F. 1,25(OH)2D3 and dihydrotestosterone interact to regulate proliferation and differentiation of epiphyseal chondrocytes. Calcif Tissue Int 2003; 73:400-10. [PMID: 12874696 DOI: 10.1007/s00223-002-2160-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [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: 11/20/2002] [Accepted: 02/03/2003] [Indexed: 11/30/2022]
Abstract
Growth plate chondrocytes are affected by 1,25(OH)2D3 and androgens, which may critically interact to regulate proliferation and differentiation during the male pubertal growth spurt. We investigated possible interactions of 1,25(OH)2D3 and the non-aromatizable androgen dihydrotestosterone (DHT) in primary chondrocyte cultures from young male rats. DHT and 1,25(OH)2D3 independently stimulated DNA synthesis and cell proliferation in a dose-dependent manner with maximally effective doses of [10(-8) M] and [10(-12) M], respectively. Both DHT and 1,25(OH)2D3 stimulated the expression and release of IGF-I, and the proliferative effects of each hormone were prevented by an IGF-I antibody. DHT and 1,25(OH)2D3 increased messenger RNAs (mRNAs) of their cognate receptors and of IGF-I receptor mRNA (IGF-I-R). 1,25(OH)2D3 also stimulated mRNA of the androgen receptor (AR), whereas DHT did not affect mRNA of the vitamin-D receptor (VDR). Coincubation with both steroid hormones did not stimulate receptor mRNAs more than either hormone alone. The proliferative effects of DHT and 1,25(OH)2D3 were completely inhibited by simultaneous incubation with both hormones, despite potentiation of IGF-I synthesis. In contrast, both hormones synergistically stimulated cell differentiation as judged by alkaline phosphatase activity, collagen X mRNA, and matrix calcification in long-term experiments. We conclude that DHT and 1,25(OH)2D3 interact with respect to chondrocyte proliferation and cell differentiation. The proliferative effects of both hormones are mediated by local IGF-I synthesis. Simultaneous coincubation with both hormones blunts the proliferative effect exerted by either hormone alone, in favor of a more marked stimulation of cell differentiation.
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Affiliation(s)
- K Krohn
- Department of Nutrition and Inborn Errors of Metabolism, University Children's Hospital, Munich D-80337, Germany
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Abstract
During the past decade, the safety and efficacy of long-term treatment with recombinant human growth hormone (rhGH) in children with chronic renal failure before and after renal transplantation has been established. This article reviews the increasing evidence that rhGH treatment also results in a significant improvement of adult height in patients with childhood-onset chronic renal failure. The eventual height benefit of extended rhGH treatment appears to be 1.0 to 1.5 standard deviations on average. Whereas prepubertal rhGH treatment has a beneficial effect on final height, the efficacy of rhGH during puberty is less evident. The cumulative duration of rhGH treatment was found to be the most important positive, and the duration of dialysis treatment periods a negative predictor of rhGH efficacy, stressing the importance of prolonged rhGH treatment starting early in the course of chronic renal failure.
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Affiliation(s)
- D Haffner
- Department of Pediatric Nephrology, Charité Hospital, Berlin, Germany.
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50
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Abstract
OBJECTIVE The objective was to assess the efficacy and safety of growth hormone (GH) treatment in severely growth retarded children with nephropathic cystinosis during conservative treatment and during renal replacement therapy. STUDY DESIGN The design was an open-labeled prospective trial with a run-in period of 1 year. RESULTS A total of 74 children with cystinosis (age 3.0 to 18 years) were treated with GH over a mean period of 3.1 years (range 1 to 10 years); 52 patients were receiving conservative treatment (mean age 7.1 years), 7 were receiving dialysis (12.5 years), and 15 had received a renal transplant (14.8 years). The mean standardized height (SD score) was -4.0 in the conservative treatment group, -4.4 in the dialysis group, and -4.9 in the renal transplant group. During the first treatment year, height velocity doubled in the conservative treatment group, increased by 80% in the dialysis group, and increased by 45% in renal transplant group. Within 3 years the height SD score increased by +1.6 (P <.001) in prepubertal patients receiving conservative treatment, and percentile parallel growth was maintained thereafter. These effects of GH were less expressed in peripubertal patients receiving renal replacement therapy. No major side effects were observed. CONCLUSION Long-term GH treatment is safe and effective in young children with nephropathic cystinosis. GH treatment should be started early in the course of the disease if adequate nutrition and cysteamine treatment do not prevent growth retardation.
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Affiliation(s)
- E Wühl
- Renal Units, the Department of Pediatrics, University Hospital of Heidelberg, 69120 Heidelberg, Germany
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