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Raynor A, Bruneel A, Vermeersch P, Cholet S, Friedrich S, Eckenweiler M, Schumann A, Hengst S, Tuncel AT, Fenaille F, Thiel C, Rymen D. "Hide and seek": Misleading transferrin variants in PMM2-CDG complicate diagnostics. Proteomics Clin Appl 2024; 18:e2300040. [PMID: 37876147 DOI: 10.1002/prca.202300040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 09/28/2023] [Accepted: 10/06/2023] [Indexed: 10/26/2023]
Abstract
PURPOSE Congenital disorders of glycosylation (CDG) are one of the fastest growing groups of inborn errors of metabolism. Despite the availability of next-generation sequencing techniques and advanced methods for evaluation of glycosylation, CDG screening mainly relies on the analysis of serum transferrin (Tf) by isoelectric focusing, HPLC or capillary electrophoresis. The main pitfall of this screening method is the presence of Tf protein variants within the general population. Although reports describe the role of Tf variants leading to falsely abnormal results, their significance in confounding diagnosis in patients with CDG has not been documented so far. Here, we describe two PMM2-CDG cases, in which Tf variants complicated the diagnostic. EXPERIMENTAL DESIGN Glycosylation investigations included classical screening techniques (capillary electrophoresis, isoelectric focusing and HPLC of Tf) and various confirmation techniques (two-dimensional electrophoresis, western blot, N-glycome, UPLC-FLR/QTOF MS with Rapifluor). Tf variants were highlighted following neuraminidase treatment. Sequencing of PMM2 was performed. RESULTS In both patients, Tf screening pointed to CDG-II, while second-line analyses pointed to CDG-I. Tf variants were found in both patients, explaining these discrepancies. PMM2 causative variants were identified in both patients. CONCLUSION AND CLINICAL RELEVANCE We suggest that a neuraminidase treatment should be performed when a typical CDG Tf pattern is found upon initial screening analysis.
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Affiliation(s)
- Alexandre Raynor
- AP-HP, Biochimie Métabolique et Cellulaire, Hôpital Bichat, Paris, France
| | - Arnaud Bruneel
- AP-HP, Biochimie Métabolique et Cellulaire, Hôpital Bichat, Paris, France
- INSERM UMR1193, Faculté de Pharmacie, Université Paris-Saclay, bâtiment Henri Moissan, Orsay, France
| | - Pieter Vermeersch
- Clinical Department of Laboratory Medicine, UZ Leuven, Leuven, Belgium
| | - Sophie Cholet
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), MetaboHUB, Gif sur Yvette, France
| | - Sebastian Friedrich
- Centre for Child and Adolescent Medicine Freiburg, Department of General Paediatrics, Adolescent Medicine and Neonatology, Freiburg, Germany
| | - Matthias Eckenweiler
- Department of Neuropediatrics and Muscle Disorders, Centre for Child and Adolescent Medicine Freiburg, Freiburg, Germany
| | - Anke Schumann
- Centre for Child and Adolescent Medicine Freiburg, Department of General Paediatrics, Adolescent Medicine and Neonatology, Freiburg, Germany
| | - Simone Hengst
- Department 1, Centre for Child and Adolescent Medicine Heidelberg, Heidelberg, Germany
| | - Ali Tunç Tuncel
- Department 1, Centre for Child and Adolescent Medicine Heidelberg, Heidelberg, Germany
| | - François Fenaille
- Université Paris-Saclay, CEA, INRAE, Département Médicaments et Technologies pour la Santé (DMTS), MetaboHUB, Gif sur Yvette, France
| | - Christian Thiel
- Department 1, Centre for Child and Adolescent Medicine Heidelberg, Heidelberg, Germany
| | - Daisy Rymen
- Department of Pediatrics, Center for Metabolic Diseases, University Hospitals Leuven, Leuven, Belgium
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Syeda SB, Lone MA, Mohassel P, Donkervoort S, Munot P, França MC, Galarza-Brito JE, Eckenweiler M, Asamoah A, Gable K, Majumdar A, Schumann A, Gupta SD, Lakhotia A, Shieh PB, Foley AR, Jackson KE, Chao KR, Winder TL, Catapano F, Feng L, Kirschner J, Muntoni F, Dunn TM, Hornemann T, Bönnemann CG. Recurrent de novo SPTLC2 variant causes childhood-onset amyotrophic lateral sclerosis (ALS) by excess sphingolipid synthesis. J Neurol Neurosurg Psychiatry 2024; 95:103-113. [PMID: 38041679 PMCID: PMC10850718 DOI: 10.1136/jnnp-2023-332132] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 09/27/2023] [Indexed: 12/03/2023]
Abstract
BACKGROUND Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease of the upper and lower motor neurons with varying ages of onset, progression and pathomechanisms. Monogenic childhood-onset ALS, although rare, forms an important subgroup of ALS. We recently reported specific SPTLC1 variants resulting in sphingolipid overproduction as a cause for juvenile ALS. Here, we report six patients from six independent families with a recurrent, de novo, heterozygous variant in SPTLC2 c.778G>A [p.Glu260Lys] manifesting with juvenile ALS. METHODS Clinical examination of the patients along with ancillary and genetic testing, followed by biochemical investigation of patients' blood and fibroblasts, was performed. RESULTS All patients presented with early-childhood-onset progressive weakness, with signs and symptoms of upper and lower motor neuron degeneration in multiple myotomes, without sensory neuropathy. These findings were supported on ancillary testing including nerve conduction studies and electromyography, muscle biopsies and muscle ultrasound studies. Biochemical investigations in plasma and fibroblasts showed elevated levels of ceramides and unrestrained de novo sphingolipid synthesis. Our studies indicate that SPTLC2 variant [c.778G>A, p.Glu260Lys] acts distinctly from hereditary sensory and autonomic neuropathy (HSAN)-causing SPTLC2 variants by causing excess canonical sphingolipid biosynthesis, similar to the recently reported SPTLC1 ALS associated pathogenic variants. Our studies also indicate that serine supplementation, which is a therapeutic in SPTLC1 and SPTCL2-associated HSAN, is expected to exacerbate the excess sphingolipid synthesis in serine palmitoyltransferase (SPT)-associated ALS. CONCLUSIONS SPTLC2 is the second SPT-associated gene that underlies monogenic, juvenile ALS and further establishes alterations of sphingolipid metabolism in motor neuron disease pathogenesis. Our findings also have important therapeutic implications: serine supplementation must be avoided in SPT-associated ALS, as it is expected to drive pathogenesis further.
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Affiliation(s)
- Safoora B Syeda
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Museer A Lone
- Institute of Clinical Chemistry, University Hospital Zürich, Zürich, Switzerland
| | - Payam Mohassel
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Sandra Donkervoort
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Pinki Munot
- NIHR Great Ormond Street Hospital Biomedical Research Centre, London, UK
| | - Marcondes C França
- Department of Neurology, University of Campinas, Campinas, Sao Paulo, Brazil
| | | | - Matthias Eckenweiler
- Department of Neuropediatrics and Muscle Disorders, Faculty of Medicine, Medical Center, University of Freiburg, Freiburg, Germany
| | - Alexander Asamoah
- Norton Children's Medical Group, University of Louisville School of Medicine, Louisville, KY, USA
| | - Kenneth Gable
- Department of Biochemistry and Molecular Biology, Uniformed Services University, Bethesda, Maryland, USA
| | - Anirban Majumdar
- Department of Paediatric Neurology, Bristol Children's Hospital, Bristol, UK
| | - Anke Schumann
- Department of Paediatrics and Adolescent Medicine, Faculty of Medicine, Medical Centre, University of Freiburg, Baden-Württemberg, Germany
| | - Sita D Gupta
- Department of Biochemistry and Molecular Biology, Uniformed Services University, Bethesda, Maryland, USA
| | - Arpita Lakhotia
- Norton Children's Medical Group, University of Louisville School of Medicine, Louisville, KY, USA
- University of Louisville, Louisville, Kentucky, USA
| | - Perry B Shieh
- Department of Neurology and Pediatrics, University of California Los Angeles, Los Angeles, CA, USA
| | - A Reghan Foley
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
| | - Kelly E Jackson
- Norton Children's Medical Group, University of Louisville School of Medicine, Louisville, KY, USA
| | - Katherine R Chao
- Center for Mendelian Genomics, Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | | | - Francesco Catapano
- Dubowitz Neuromuscular Centre, CL Great Ormond Street Institute of Child Health and Great Ormond Street Hospital, London, UK
| | - Lucy Feng
- Dubowitz Neuromuscular Centre, CL Great Ormond Street Institute of Child Health and Great Ormond Street Hospital, London, UK
| | - Janbernd Kirschner
- Department of Neuropediatrics and Muscle Disorders, Faculty of Medicine, Medical Center, University of Freiburg, Freiburg, Germany
| | - Francesco Muntoni
- NIHR Great Ormond Street Hospital Biomedical Research Centre, London, UK
- Dubowitz Neuromuscular Centre, CL Great Ormond Street Institute of Child Health and Great Ormond Street Hospital, London, UK
| | - Teresa M Dunn
- Department of Biochemistry and Molecular Biology, Uniformed Services University of Health Sciences, Bethesda, MD, USA
| | - Thorsten Hornemann
- Institute of Clinical Chemistry, University Hospital Zürich, Zürich, Switzerland
| | - Carsten G Bönnemann
- Neuromuscular and Neurogenetic Disorders of Childhood Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD, USA
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Moritz L, Schumann A, Pohl M, Köttgen A, Hannibal L, Spiekerkoetter U. A systematic review of metabolomic findings in adult and pediatric renal disease. Clin Biochem 2024; 123:110703. [PMID: 38097032 DOI: 10.1016/j.clinbiochem.2023.110703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 12/03/2023] [Accepted: 12/07/2023] [Indexed: 12/29/2023]
Abstract
Chronic kidney disease (CKD) affects over 0.5 billion people worldwide across their lifetimes. Despite a growingly ageing world population, an increase in all-age prevalence of kidney disease persists. Adult-onset forms of kidney disease often result from lifestyle-modifiable metabolic illnesses such as type 2 diabetes. Pediatric and adolescent forms of renal disease are primarily caused by morphological abnormalities of the kidney, as well as immunological, infectious and inherited metabolic disorders. Alterations in energy metabolism are observed in CKD of varying causes, albeit the molecular mechanisms underlying pathology are unclear. A systematic indexing of metabolites identified in plasma and urine of patients with kidney disease alongside disease enrichment analysis uncovered inborn errors of metabolism as a framework that links features of adult and pediatric kidney disease. The relationship of genetics and metabolism in kidney disease could be classified into three distinct landscapes: (i) Normal genotypes that develop renal damage because of lifestyle and / or comorbidities; (ii) Heterozygous genetic variants and polymorphisms that result in unique metabotypes that may predispose to the development of kidney disease via synergistic heterozygosity, and (iii) Homozygous genetic variants that cause renal impairment by perturbing metabolism, as found in children with monogenic inborn errors of metabolism. Interest in the identification of early biomarkers of onset and progression of CKD has grown steadily in the last years, though it has not translated into clinical routine yet. This systematic review indexes findings of differential concentration of metabolites and energy pathway dysregulation in kidney disease and appraises their potential use as biomarkers.
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Affiliation(s)
- Lennart Moritz
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany; Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany
| | - Anke Schumann
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany; Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany
| | - Martin Pohl
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany
| | - Anna Köttgen
- Institute of Genetic Epidemiology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany
| | - Luciana Hannibal
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
| | - Ute Spiekerkoetter
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
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Maier S, Nickel K, Lange T, Oeltzschner G, Dacko M, Endres D, Runge K, Schumann A, Domschke K, Rousos M, Tebartz van Elst L. Increased cerebral lactate levels in adults with autism spectrum disorders compared to non-autistic controls: a magnetic resonance spectroscopy study. Mol Autism 2023; 14:44. [PMID: 37978557 PMCID: PMC10655272 DOI: 10.1186/s13229-023-00577-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 11/10/2023] [Indexed: 11/19/2023] Open
Abstract
INTRODUCTION Autism spectrum disorder (ASD) encompasses a heterogeneous group with varied phenotypes and etiologies. Identifying pathogenic subgroups could facilitate targeted treatments. One promising avenue is investigating energy metabolism, as mitochondrial dysfunction has been implicated in a subgroup of ASD. Lactate, an indicator of energy metabolic anomalies, may serve as a potential biomarker for this subgroup. This study aimed to examine cerebral lactate (Lac+) levels in high-functioning adults with ASD, hypothesizing elevated mean Lac+ concentrations in contrast to neurotypical controls (NTCs). MATERIALS AND METHODS Magnetic resonance spectroscopy (MRS) was used to study cerebral Lac+ in 71 adults with ASD and NTC, focusing on the posterior cingulate cortex (PCC). After quality control, 64 ASD and 58 NTC participants remained. Lac+ levels two standard deviations above the mean of the control group were considered elevated. RESULTS Mean PCC Lac+ levels were significantly higher in the ASD group than in the NTC group (p = 0.028; Cohen's d = 0.404), and 9.4% of the ASD group had elevated levels as compared to 0% of the NTCs (p = 0.029). No significant correlation was found between blood serum lactate levels and MRS-derived Lac+ levels. LIMITATIONS A cautious interpretation of our results is warranted due to a p value of 0.028. In addition, a higher than anticipated proportion of data sets had to be excluded due to poor spectral quality. CONCLUSION This study confirms the presence of elevated cerebral Lac+ levels in a subgroup of adults with ASD, suggesting the potential of lactate as a biomarker for mitochondrial dysfunction in a subgroup of ASD. The lower-than-expected prevalence (20% was expected) and moderate increase require further investigation to elucidate the underlying mechanisms and relationships with mitochondrial function.
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Affiliation(s)
- Simon Maier
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Hauptstraße 5, 79104, Freiburg, Germany.
| | - Kathrin Nickel
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Hauptstraße 5, 79104, Freiburg, Germany
| | - Thomas Lange
- Medical Physics, Department of Radiology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Georg Oeltzschner
- Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
- F. M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, USA
| | - Michael Dacko
- Medical Physics, Department of Radiology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Dominique Endres
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Hauptstraße 5, 79104, Freiburg, Germany
| | - Kimon Runge
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Hauptstraße 5, 79104, Freiburg, Germany
| | - Anke Schumann
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Katharina Domschke
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Hauptstraße 5, 79104, Freiburg, Germany
| | - Michalis Rousos
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Hauptstraße 5, 79104, Freiburg, Germany
| | - Ludger Tebartz van Elst
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Hauptstraße 5, 79104, Freiburg, Germany
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Schumann A, Schultheiss UT, Ferreira CR, Blau N. Clinical and biochemical footprints of inherited metabolic diseases. XIV. Metabolic kidney diseases. Mol Genet Metab 2023; 140:107683. [PMID: 37597335 DOI: 10.1016/j.ymgme.2023.107683] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/11/2023] [Accepted: 08/11/2023] [Indexed: 08/21/2023]
Abstract
Kidney disease is a global health burden with high morbidity and mortality. Causes of kidney disease are numerous, extending from common disease groups like diabetes and arterial hypertension to rare conditions including inherited metabolic diseases (IMDs). Given its unique anatomy and function, the kidney is a target organ in about 10% of known IMDs, emphasizing the relevant contribution of IMDs to kidney disease. The pattern of injury affects all segments of the nephron including glomerular disease, proximal and distal tubular damage, kidney cyst formation, built-up of nephrocalcinosis and stones as well as severe malformations. We revised and updated the list of known metabolic etiologies associated with kidney involvement and found 190 relevant IMDs. This represents the 14th of a series of educational articles providing a comprehensive and revised list of metabolic differential diagnoses according to system involvement.
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Affiliation(s)
- Anke Schumann
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center-University of Freiburg, Faculty of Medicine, Freiburg, Germany.
| | - Ulla T Schultheiss
- Department of Medicine IV, Nephrology and Primary Care, Faculty of Medicine, and Medical Center, University of Freiburg, Institute of Genetic Epidemiology, Freiburg, Germany.
| | - Carlos R Ferreira
- National Human Genome Research Institute, National Institutes of Health, Bethesda, USA.
| | - Nenad Blau
- Division of Metabolism, University Children's Hospital, Zürich, Switzerland.
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Nickel K, Menke M, Endres D, Runge K, Tucci S, Schumann A, Domschke K, Tebartz van Elst L, Maier S. Altered markers of mitochondrial function in adults with autism spectrum disorder. Autism Res 2023; 16:2125-2138. [PMID: 37715660 DOI: 10.1002/aur.3029] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 08/30/2023] [Indexed: 09/18/2023]
Abstract
Previous research suggests potential mitochondrial dysfunction and changes in fatty acid metabolism in a subgroup of individuals with autism spectrum disorder (ASD), indicated by higher lactate, pyruvate levels, and mitochondrial disorder prevalence. This study aimed to further investigate potential mitochondrial dysfunction in ASD by assessing blood metabolite levels linked to mitochondrial metabolism. Blood levels of creatine kinase (CK), alanine aminotransferase (ALT), aspartate aminotransferase (AST), lactate, pyruvate, free and total carnitine, as well as acylcarnitines were obtained in 73 adults with ASD (47 males, 26 females) and compared with those of 71 neurotypical controls (NTC) (44 males, 27 females). Correlations between blood parameters and psychometric ASD symptom scores were also explored. Lower CK (pcorr = 0.045) levels were found exclusively in males with ASD compared to NTC, with no such variation in females. ALT and AST levels did not differ significantly between both groups. After correction for antipsychotic and antidepressant medication, CK remained significant. ASD participants had lower serum lactate levels (pcorr = 0.036) compared to NTC, but pyruvate and carnitine concentrations showed no significant difference. ASD subjects had significantly increased levels of certain acylcarnitines, with a decrease in tetradecadienoyl-carnitine (C14:2), and certain acylcarnitines correlated significantly with autistic symptom scores. We found reduced serum lactate levels in ASD, in contrast to previous studies suggesting elevated lactate or pyruvate. This difference may reflect the focus of our study on high-functioning adults with ASD, who are likely to have fewer secondary genetic conditions associated with mitochondrial dysfunction. Our findings of significantly altered acylcarnitine levels in ASD support the hypothesis of altered fatty acid metabolism in a subset of ASD patients.
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Affiliation(s)
- Kathrin Nickel
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Mia Menke
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Dominique Endres
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Kimon Runge
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Sara Tucci
- Pharmacy, Medical Center, University of Freiburg, Freiburg, Germany
| | - Anke Schumann
- Center for Pediatrics and Adolescent Medicine, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Katharina Domschke
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Ludger Tebartz van Elst
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Simon Maier
- Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
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Grünert SC, Ziagaki A, Heinen A, Schumann A, Tucci S, Spiekerkoetter U, Schmidts M. Riboflavin 1 Transporter Deficiency: Novel SLC52A1 Variants and Expansion of the Phenotypic Spectrum. Genes (Basel) 2023; 14:1408. [PMID: 37510312 PMCID: PMC10378786 DOI: 10.3390/genes14071408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 06/30/2023] [Accepted: 07/05/2023] [Indexed: 07/30/2023] Open
Abstract
Riboflavin transporter 1 (RFVT1) deficiency is an ultrarare metabolic disorder due to autosomal dominant pathogenic variants in SLC52A1. The RFVT1 protein is mainly expressed in the placenta and intestine. To our knowledge, only five cases of RFVT1 deficiency from three families have been reported so far. While newborns and infants with SLC52A1 variants mainly showed a multiple acyl-CoA dehydrogenase deficiency-like presentation, individuals identified in adulthood were usually clinically asymptomatic. We report two patients with novel heterozygous SLC52A1 variants. Patient 1 presented at the age of 62 with mild hyperammonemia following gastroenteritis. An acylcarnitine analysis in dried blood spots was abnormal with a multiple acyl-CoA dehydrogenase deficiency-like pattern, and genetic analysis confirmed a heterozygous SLC52A1 variant, c.68C > A, p. Ser23Tyr. Patient 2 presented with recurrent seizures and hypsarrhythmia at the age of 7 months. Metabolic investigations yielded unremarkable results. However, whole exome sequencing revealed a heterozygous start loss variant, c.3G > A, p. Met1Ile in SLC52A1. These two cases expand the clinical spectrum of riboflavin transporter 1 deficiency and demonstrate that symptomatic presentation in adulthood is possible.
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Affiliation(s)
- Sarah C. Grünert
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.S.); (S.T.); (U.S.); (M.S.)
| | - Athanasia Ziagaki
- Medizinische Klinik für Endokrinologie und Stoffwechselmedizin, Campus Virchow, Charité Universitätsmedizin Berlin, 10117 Berlin, Germany;
| | - André Heinen
- Department of Pediatrics, Faculty of Medicine and University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany;
| | - Anke Schumann
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.S.); (S.T.); (U.S.); (M.S.)
| | - Sara Tucci
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.S.); (S.T.); (U.S.); (M.S.)
- Pharmacy, Medical Center, University of Freiburg, 79106 Freiburg, Germany
| | - Ute Spiekerkoetter
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.S.); (S.T.); (U.S.); (M.S.)
| | - Miriam Schmidts
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.S.); (S.T.); (U.S.); (M.S.)
- CIBSS—Center for Integrative Biological Signaling Studies, University of Freiburg, 79104 Freiburg, Germany
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8
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Schumann A, Brutsche M, Havermans M, Grünert SC, Kölker S, Groß O, Hannibal L, Spiekerkoetter U. The impact of metabolic stressors on mitochondrial homeostasis in a renal epithelial cell model of methylmalonic aciduria. Sci Rep 2023; 13:7677. [PMID: 37169781 PMCID: PMC10175303 DOI: 10.1038/s41598-023-34373-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 04/28/2023] [Indexed: 05/13/2023] Open
Abstract
Methylmalonic aciduria (MMA-uria) is caused by deficiency of the mitochondrial enzyme methylmalonyl-CoA mutase (MUT). MUT deficiency hampers energy generation from specific amino acids, odd-chain fatty acids and cholesterol. Chronic kidney disease (CKD) is a well-known long-term complication. We exposed human renal epithelial cells from healthy controls and MMA-uria patients to different culture conditions (normal treatment (NT), high protein (HP) and isoleucine/valine (I/V)) to test the effect of metabolic stressors on renal mitochondrial energy metabolism. Creatinine levels were increased and antioxidant stress defense was severely comprised in MMA-uria cells. Alterations in mitochondrial homeostasis were observed. Changes in tricarboxylic acid cycle metabolites and impaired energy generation from fatty acid oxidation were detected. Methylcitrate as potentially toxic, disease-specific metabolite was increased by HP and I/V load. Mitophagy was disabled in MMA-uria cells, while autophagy was highly active particularly under HP and I/V conditions. Mitochondrial dynamics were shifted towards fission. Sirtuin1, a stress-resistance protein, was down-regulated by HP and I/V exposure in MMA-uria cells. Taken together, both interventions aggravated metabolic fingerprints observed in MMA-uria cells at baseline. The results point to protein toxicity in MMA-uria and lead to a better understanding, how the accumulating, potentially toxic organic acids might trigger CKD.
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Affiliation(s)
- Anke Schumann
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center-University of Freiburg, Faculty of Medicine, Mathildenstr. 1, 79106, Freiburg, Germany.
| | - Marion Brutsche
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center-University of Freiburg, Faculty of Medicine, Mathildenstr. 1, 79106, Freiburg, Germany
| | - Monique Havermans
- Institute of Neuropathology, Faculty of Medicine, Medical Center, University of Freiburg, Freiburg, Germany
| | - Sarah C Grünert
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center-University of Freiburg, Faculty of Medicine, Mathildenstr. 1, 79106, Freiburg, Germany
| | - Stefan Kölker
- Division of Neuropediatrics and Pediatric Metabolic Medicine, Center for Child and Adolescent Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Olaf Groß
- Institute of Neuropathology, Faculty of Medicine, Medical Center, University of Freiburg, Freiburg, Germany
| | - Luciana Hannibal
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Laboratory of Clinical Biochemistry and Metabolism, Medical Center, University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Ute Spiekerkoetter
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center-University of Freiburg, Faculty of Medicine, Mathildenstr. 1, 79106, Freiburg, Germany
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9
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Greving H, Bruckermann T, Schumann A, Stillfried M, Börner K, Hagen R, Kimmig SE, Brandt M, Kimmerle J. Attitudes Toward Engagement in Citizen Science Increase Self-Related, Ecology-Related, and Motivation-Related Outcomes in an Urban Wildlife Project. Bioscience 2023; 73:206-219. [PMID: 36936382 PMCID: PMC10020826 DOI: 10.1093/biosci/biad003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023] Open
Abstract
Citizen science projects are crucial for engaging citizens in conservation efforts. Although attitudes toward engagement in citizen science were mostly considered an outcome of citizen science participation, citizens may also have a certain attitude toward engagement in citizen science when starting with a citizen science project. Moreover, there is a lack of citizen science studies that consider changes over longer periods of time. Therefore, in this research, we present two-wave data from four field studies of a citizen science project about urban wildlife ecology using cross-lagged panel analyses. We investigated the influence of attitudes toward engagement in citizen science on self-related, ecology-related, and motivation-related outcomes. We found that positive attitudes toward engagement in citizen science at the beginning of the project had positive influences on the participants' psychological ownership and pride in their participation, their attitudes toward and enthusiasm about wildlife, and their internal and external motivation 2 months later. We discuss the implications for citizen science research and practice.
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Affiliation(s)
| | - Till Bruckermann
- Institute of Education, Leibniz University Hannover, Hannover, Germany
- Department of Biology Education, IPN–Leibniz Institute for Science and Mathematics Education, Kiel, Germany
| | - Anke Schumann
- Science Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Milena Stillfried
- Department of Ecological Dynamics, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Konstantin Börner
- Department of Ecological Dynamics, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Robert Hagen
- Department of Ecological Dynamics, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Sophia E Kimmig
- Department of Ecological Dynamics, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Miriam Brandt
- Department of Science Management, Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Joachim Kimmerle
- Knowledge Construction Lab, Leibniz-Institut für Wissensmedien, Tübingen, Germany
- Department of Psychology, Eberhard Karls University of Tübingen, Tübingen, Germany
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10
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Bruckermann T, Greving H, Stillfried M, Schumann A, Brandt M, Harms U. I'm fine with collecting data: Engagement profiles differ depending on scientific activities in an online community of a citizen science project. PLoS One 2022; 17:e0275785. [PMID: 36215274 PMCID: PMC9551629 DOI: 10.1371/journal.pone.0275785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 09/22/2022] [Indexed: 11/18/2022] Open
Abstract
Digital technologies facilitate collaboration between citizens and scientists in citizen science (CS) projects. Besides the facilitation of data transmission and access, digital technologies promote novel formats for education in CS by including citizens in the process of collecting, analyzing, and discussing data. It is usually assumed that citizens profit more from CS the more they participate in the different steps of the scientific process. However, it has so far not been analyzed whether citizens actually engage in these steps. Therefore, we investigated citizens' actual engagement in different scientific steps online (i.e., data collection and data analysis) in two field studies of a CS project. We then compared them with other CS projects. We analyzed behavioral engagement patterns of N = 273 participants with activity logs and cluster analyses. Opportunities to engage in different steps of the scientific process increased participants' overall commitment compared to contributory CS projects. Yet, despite their increased commitment, participants' engagement was only more active for data collection but not for data analysis. We discuss how participants' perceived role as data collectors influenced their actual engagement in the scientific steps. To conclude, citizens may need support to change their role from data collectors to data inquirers.
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Affiliation(s)
- Till Bruckermann
- Institute of Education, Leibniz University Hannover, Hannover, Germany
- IPN–Leibniz Institute for Science and Mathematics Education, Kiel, Germany
- * E-mail:
| | - Hannah Greving
- Leibniz-Institut für Wissensmedien (IWM), Tübingen, Germany
| | - Milena Stillfried
- Leibniz Institute for Zoo and Wildlife Research (IZW), Berlin, Germany
| | - Anke Schumann
- Leibniz Institute for Zoo and Wildlife Research (IZW), Berlin, Germany
| | - Miriam Brandt
- Leibniz Institute for Zoo and Wildlife Research (IZW), Berlin, Germany
| | - Ute Harms
- IPN–Leibniz Institute for Science and Mathematics Education, Kiel, Germany
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11
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Grünert SC, Schumann A, Spiekerkoetter U. Severe loss of appetite and refusal to eat as severe side effect of glycerol phenylbutyrate. JIMD Rep 2022; 63:521-523. [DOI: 10.1002/jmd2.12286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/18/2022] [Accepted: 03/22/2022] [Indexed: 11/12/2022] Open
Affiliation(s)
- Sarah Catharina Grünert
- Department of General Pediatrics, Adolescent Medicine and Neonatology Medical Center‐University of Freiburg, Faculty of Medicine Freiburg Germany
| | - Anke Schumann
- Department of General Pediatrics, Adolescent Medicine and Neonatology Medical Center‐University of Freiburg, Faculty of Medicine Freiburg Germany
| | - Ute Spiekerkoetter
- Department of General Pediatrics, Adolescent Medicine and Neonatology Medical Center‐University of Freiburg, Faculty of Medicine Freiburg Germany
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12
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Grünert SC, Rosenbaum‐Fabian S, Schumann A, Selbitz A, Merz W, Gieselmann A, Spiekerkoetter U. Two successful pregnancies and first use of empagliflozin during pregnancy in glycogen storage disease type Ib. JIMD Rep 2022; 63:303-308. [PMID: 35822091 PMCID: PMC9259388 DOI: 10.1002/jmd2.12295] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 04/14/2022] [Accepted: 05/05/2022] [Indexed: 12/05/2022] Open
Abstract
Glycogen storage disease type Ib (GSD Ib) is caused by biallelic variants in SLC37A4. GSD Ib is characterized by hepatomegaly, recurrent hypoglycemia, neutropenia, and neutrophil dysfunction. Only seven pregnancies in four women with GSD Ib have been reported so far. We report on two further successful pregnancies in two patients with GSD Ib. One of these pregnancies was managed with empagliflozin, an SGLT2 inhibitor, repurposed for the treatment of neutropenia in GSD Ib. Both pregnancies were unremarkable and resulted in healthy offspring. Gestational care and pre‐ and perinatal management in GSD Ib are challenging and require close interdisciplinary metabolic and obstetric monitoring. In our patient, the use of empagliflozin during pregnancy was successful in the prevention of neutropenic symptoms and infections and enabled good wound healing after Cesarean section, while no adverse effects were observed.
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Affiliation(s)
- Sarah Catharina Grünert
- Department of General Paediatrics, Adolescent Medicine and Neonatology Medical Centre‐University of Freiburg, Faculty of Medicine Freiburg Germany
| | - Stefanie Rosenbaum‐Fabian
- Department of General Paediatrics, Adolescent Medicine and Neonatology Medical Centre‐University of Freiburg, Faculty of Medicine Freiburg Germany
| | - Anke Schumann
- Department of General Paediatrics, Adolescent Medicine and Neonatology Medical Centre‐University of Freiburg, Faculty of Medicine Freiburg Germany
| | - Anne‐Christine Selbitz
- Institute of Experimental Hematology and Transfusion Medicine University Hospital Bonn Bonn Germany
| | - Waltraut Merz
- Department of Obstetrics and Prenatal Medicine University Bonn Medical School Bonn Germany
| | - Andrea Gieselmann
- Department of Pediatric Cardiology University Hospital Bonn Bonn Germany
| | - Ute Spiekerkoetter
- Department of General Paediatrics, Adolescent Medicine and Neonatology Medical Centre‐University of Freiburg, Faculty of Medicine Freiburg Germany
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13
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Bravo AC, Aguilera MNL, Marziali NR, Moritz L, Wingert V, Klotz K, Schumann A, Grünert SC, Spiekerkoetter U, Berger U, Lederer AK, Huber R, Hannibal L. Analysis of S-Adenosylmethionine and S-Adenosylhomocysteine: Method Optimisation and Profiling in Healthy Adults upon Short-Term Dietary Intervention. Metabolites 2022; 12:373. [PMID: 35629877 PMCID: PMC9143066 DOI: 10.3390/metabo12050373] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/28/2022] [Accepted: 04/02/2022] [Indexed: 02/04/2023] Open
Abstract
S-adenosylmethionine (SAM) is essential for methyl transfer reactions. All SAM is produced de novo via the methionine cycle. The demethylation of SAM produces S-adenosylhomocysteine (SAH), an inhibitor of methyltransferases and the precursor of homocysteine (Hcy). The measurement of SAM and SAH in plasma has value in the diagnosis of inborn errors of metabolism (IEM) and in research to assess methyl group homeostasis. The determination of SAM and SAH is complicated by the instability of SAM under neutral and alkaline conditions and the naturally low concentration of both SAM and SAH in plasma (nM range). Herein, we describe an optimised LC-MS/MS method for the determination of SAM and SAH in plasma, urine, and cells. The method is based on isotopic dilution and employs 20 µL of plasma or urine, or 500,000 cells, and has an instrumental running time of 5 min. The reference ranges for plasma SAM and SAH in a cohort of 33 healthy individuals (age: 19-60 years old; mean ± 2 SD) were 120 ± 36 nM and 21.5 ± 6.5 nM, respectively, in accordance with independent studies and diagnostic determinations. The method detected abnormal concentrations of SAM and SAH in patients with inborn errors of methyl group metabolism. Plasma and urinary SAM and SAH concentrations were determined for the first time in a randomised controlled trial of 53 healthy adult omnivores (age: 18-60 years old), before and after a 4 week intervention with a vegan or meat-rich diet, and revealed preserved variations of both metabolites and the SAM/SAH index.
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Affiliation(s)
- Aida Corrillero Bravo
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.C.B.); (M.N.L.A.); (N.R.M.); (L.M.); (V.W.); (K.K.); (A.S.); (U.B.)
| | - Maria Nieves Ligero Aguilera
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.C.B.); (M.N.L.A.); (N.R.M.); (L.M.); (V.W.); (K.K.); (A.S.); (U.B.)
| | - Nahuel R. Marziali
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.C.B.); (M.N.L.A.); (N.R.M.); (L.M.); (V.W.); (K.K.); (A.S.); (U.B.)
| | - Lennart Moritz
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.C.B.); (M.N.L.A.); (N.R.M.); (L.M.); (V.W.); (K.K.); (A.S.); (U.B.)
| | - Victoria Wingert
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.C.B.); (M.N.L.A.); (N.R.M.); (L.M.); (V.W.); (K.K.); (A.S.); (U.B.)
| | - Katharina Klotz
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.C.B.); (M.N.L.A.); (N.R.M.); (L.M.); (V.W.); (K.K.); (A.S.); (U.B.)
| | - Anke Schumann
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.C.B.); (M.N.L.A.); (N.R.M.); (L.M.); (V.W.); (K.K.); (A.S.); (U.B.)
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.C.G.); (U.S.)
| | - Sarah C. Grünert
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.C.G.); (U.S.)
| | - Ute Spiekerkoetter
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (S.C.G.); (U.S.)
| | - Urs Berger
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.C.B.); (M.N.L.A.); (N.R.M.); (L.M.); (V.W.); (K.K.); (A.S.); (U.B.)
| | - Ann-Kathrin Lederer
- Center for Complementary Medicine, Department of Internal Medicine II, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.-K.L.); (R.H.)
| | - Roman Huber
- Center for Complementary Medicine, Department of Internal Medicine II, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.-K.L.); (R.H.)
| | - Luciana Hannibal
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.C.B.); (M.N.L.A.); (N.R.M.); (L.M.); (V.W.); (K.K.); (A.S.); (U.B.)
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14
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Lewanzik D, Straka TM, Lorenz J, Marggraf L, Voigt-Heucke S, Schumann A, Brandt M, Voigt CC. Evaluating the potential of urban areas for bat conservation with citizen science data. Environ Pollut 2022; 297:118785. [PMID: 34979170 DOI: 10.1016/j.envpol.2021.118785] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 12/13/2021] [Accepted: 12/30/2021] [Indexed: 06/14/2023]
Abstract
Global change, including urbanisation, threatens many of the >1400 bat species. Nevertheless, certain areas within highly urbanised cities may be suitable to harbour bat populations. Thus, managing urban habitats could contribute to bat conservation. Here, we wanted to establish evidence-based recommendations on how to improve urban spaces for the protection of bats. In a team effort with >200 citizen scientists, we recorded bat vocalisations up to six times over the course of 2 years at each of 600 predefined sites in the Berlin metropolitan area. For each species we identified the preferred and non-preferred landscape features. Our results show that artificial light at night (ALAN) had a negative impact on all species. For soprano pipistrelles and mouse-eared bats ALAN had the largest effect sizes among all environmental predictors. Canopy cover and open water were especially important for bat species that forage along vegetation edges and for trawling bats, respectively. Occurrence probability of species foraging in open space decreased with increasing distance to water bodies. On a larger scale, impervious surfaces tended to have positive effects on some species that are specialised on foraging along edge structures. Our study constitutes an important contribution to the growing body of literature showing that despite the many negative impacts of urbanisation on wildlife, urban environments can harbour bat populations if certain conditions are met, such as access to vegetation and water bodies and low levels of ALAN. Our findings are of high relevance for urban planners and conservationists, as they allow inferences on how to manage urban spaces in a bat-friendly way. We recommend limiting ALAN to the minimum necessary and maintaining and creating uninterrupted vegetated corridors between areas with high levels of canopy cover and water bodies, in which ALAN should be entirely avoided.
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Affiliation(s)
- Daniel Lewanzik
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str. 17, 10315, Berlin, Germany.
| | - Tanja M Straka
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str. 17, 10315, Berlin, Germany
| | - Julia Lorenz
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str. 17, 10315, Berlin, Germany
| | - Lara Marggraf
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str. 17, 10315, Berlin, Germany
| | - Silke Voigt-Heucke
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str. 17, 10315, Berlin, Germany
| | - Anke Schumann
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str. 17, 10315, Berlin, Germany
| | - Miriam Brandt
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str. 17, 10315, Berlin, Germany
| | - Christian C Voigt
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str. 17, 10315, Berlin, Germany
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15
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Schumann A, Grünert S, Spiekerkötter U. Neugeborenes mit Trinkschwäche und Somnolenz am 2. Lebenstag. Monatsschr Kinderheilkd 2022. [DOI: 10.1007/s00112-021-01388-2] [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: 11/30/2022]
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16
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Louvrier JLP, Planillo A, Stillfried M, Hagen R, Börner K, Kimmig S, Ortmann S, Schumann A, Brandt M, Kramer-Schadt S. Spatiotemporal interactions of a novel mesocarnivore community in an urban environment before and during SARS-CoV-2 lockdown. J Anim Ecol 2021; 91:367-380. [PMID: 34775595 PMCID: PMC8652482 DOI: 10.1111/1365-2656.13635] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 10/19/2021] [Indexed: 12/30/2022]
Abstract
Studying species interactions and niche segregation under human pressure provides important insights into species adaptation, community functioning and ecosystem stability. Due to their high plasticity in behaviour and diet, urban mesocarnivores are ideal species for studying community assembly in novel communities. We analysed the spatial and temporal species interactions of an urban mesocarnivore community composed of the red fox Vulpes vulpes and the marten Martes sp. as native species, the raccoon Procyon lotor as invasive species, and the cat Felis catus as a domestic species in combination with human disturbance modulated by the SARS‐CoV‐2 lockdown effect that happened while the study was conducted. We analysed camera trap data and applied a joint species distribution model to understand not only the environmental variables influencing the detection of mesocarnivores and their use intensity of environmental features but also the species’ co‐occurrences while accounting for environmental variables. We then assessed whether they displayed temporal niche partitioning based on activity analyses, and finally analysed at a smaller temporal scale the time of delay after the detection of another focal species. We found that species were more often detected and displayed a higher use intensity in gardens during the SARS‐CoV‐2 lockdown period, while showing a shorter temporal delay during the same period, meaning a high human‐induced spatiotemporal overlap. All three wild species spatially co‐occurred within the urban area, with a positive response of raccoons to cats in detection and use intensity, whereas foxes showed a negative trend towards cats. When assessing the temporal partitioning, we found that all wild species showed overlapping nocturnal activities. All species displayed temporal segregation based on temporal delay. According to the temporal delay analyses, cats were the species avoided the most by all wild species. To conclude, we found that although the wild species were positively associated in space, the avoidance occurred at a smaller temporal scale, and human pressure in addition led to high spatiotemporal overlap. Our study sheds light to the complex patterns underlying the interactions in a mesocarnivore community both spatially and temporally, and the exacerbated effect of human pressure on community dynamics.
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Affiliation(s)
- Julie L P Louvrier
- Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany.,Institute of Ecology, Technische Universität Berlin, Berlin, Germany
| | - Aimara Planillo
- Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany.,Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Gartenhaus, Berlin, Germany
| | | | - Robert Hagen
- Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | | | - Sophia Kimmig
- Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Sylvia Ortmann
- Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Anke Schumann
- Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Miriam Brandt
- Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Stephanie Kramer-Schadt
- Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany.,Institute of Ecology, Technische Universität Berlin, Berlin, Germany.,Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Gartenhaus, Berlin, Germany
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17
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Grünert SC, Schumann A, Baronio F, Tsiakas K, Murko S, Spiekerkoetter U, Santer R. Evidence for a Genotype-Phenotype Correlation in Patients with Pathogenic GLUT2 ( SLC2A2) Variants. Genes (Basel) 2021; 12:genes12111785. [PMID: 34828390 PMCID: PMC8622088 DOI: 10.3390/genes12111785] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Accepted: 11/04/2021] [Indexed: 02/06/2023] Open
Abstract
Fanconi-Bickel syndrome (FBS) is a very rare but distinct clinical entity with the combined features of hepatic glycogen storage disease, generalized proximal renal tubular dysfunction with disproportionately severe glucosuria, and impaired galactose tolerance. Here, we report five cases (out of 93 diagnosed in our lab) with pathogenic variants on both GLUT2 (SLC2A2) alleles. They come from 3 families and presented with an exceptionally mild clinical course. This course was correlated to data from old and most recent expression and transport studies in Xenopus oocytes. GLUT2 genotype in patients 1 and 2 was p.[153_4delLI];[P417R] with the first variant exhibiting normal membrane expression and partially retained transport activity (5.8%) for 2-deoxyglucose. In patient 3, the very first GLUT2 variant ever detected (p.V197I) was found, but for the first time it was present in a patient in the homozygous state. This variant had also shown unaffected membrane expression and remarkable residual activity (8%). The genotype in patient 4, p.[153_4delLI];[(E440A)], again included the 2-amino-acid deletion with residual transporter function, and patient 5 is the first found to be homozygous for this variant. Our results provide further evidence for a genotype-phenotype correlation in patients with GLUT2 variants; non-functional variants result in the full picture of FBS while dysfunctional variants may result in milder presentations, even glucosuria only, without other typical signs of FBS.
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Affiliation(s)
- Sarah C. Grünert
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (A.S.); (U.S.)
- Correspondence:
| | - Anke Schumann
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (A.S.); (U.S.)
| | - Federico Baronio
- Pediatric Unit, Department of Medical and Surgical Sciences, Regional Center for Expanded Newborn Screening, S. Orsola—Malpighi University Hospital, 40138 Bologna, Italy;
| | - Konstantinos Tsiakas
- Department of Pediatrics, University Medical Center Eppendorf, 20246 Hamburg, Germany; (K.T.); (S.M.); (R.S.)
| | - Simona Murko
- Department of Pediatrics, University Medical Center Eppendorf, 20246 Hamburg, Germany; (K.T.); (S.M.); (R.S.)
| | - Ute Spiekerkoetter
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center—University of Freiburg, 79106 Freiburg, Germany; (A.S.); (U.S.)
| | - René Santer
- Department of Pediatrics, University Medical Center Eppendorf, 20246 Hamburg, Germany; (K.T.); (S.M.); (R.S.)
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18
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Schumann A, Belche V, Schaller K, Grünert SC, Kaech A, Baumgartner MR, Kölker S, Hannibal L, Spiekerkoetter U. Mitochondrial damage in renal epithelial cells is potentiated by protein exposure in propionic aciduria. J Inherit Metab Dis 2021; 44:1330-1342. [PMID: 34297429 DOI: 10.1002/jimd.12419] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 04/15/2021] [Revised: 07/15/2021] [Accepted: 07/20/2021] [Indexed: 12/23/2022]
Abstract
Propionic aciduria (PA) is caused by deficiency of the mitochondrial enzyme propionyl-CoA carboxylase (PCC). Due to inefficient propionate catabolism patients are endangered by life-threatening ketoacidotic crisis. Protein and amino acid restriction are major therapeutic pillars. However, long-term complications like neurological deterioration and cardiac abnormalities cannot be prevented. Chronic kidney disease (CKD), which is a well-known characteristic of methylmalonic aciduria two enzymatic steps downstream from PCC, has been recognized as a novel late-onset complication in PA. The pathophysiology of CKD in PA is unclear. We investigated mitochondrial structure and metabolism in human renal tubular cells of healthy controls and PA patients. The cells were exposed to either standard cell culture conditions (NT), high protein (HP) or high concentrations of isoleucine and valine (I/V). Mitochondrial morphology changed to condensed, fractured morphology in PA cells irrespective of the cell culture medium. HP and I/V exposure, however, potentiated oxidative stress in PA cells. Mitochondrial mass was enriched in PA cells, and further increased by HP and I/V exposure suggesting a need for compensation. Alterations in the tricarboxylic acid cycle intermediates and accumulation of medium- and long-chain acylcarnitines pointed to altered mitochondrial energy metabolism. Mitophagy was silenced while autophagy as cellular defense mechanisms was highly active in PA cells. The data demonstrate that PA is associated with renal mitochondrial damage which is aggravated by protein and I/V load. Preservation of mitochondrial energy homeostasis in renal cells may be a potential future therapeutic target.
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Affiliation(s)
- Anke Schumann
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center-University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Véronique Belche
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center-University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Kristin Schaller
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center-University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Sarah C Grünert
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center-University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Andres Kaech
- Center for Microscopy and Image Analysis, University of Zurich, Zurich, Switzerland
| | - Matthias R Baumgartner
- Division of Metabolism and Children's Research Center, University Children's Hospital, University of Zurich, Zurich, Switzerland
| | - Stefan Kölker
- Division of Neuropediatrics and Pediatric Metabolic Medicine, Center for Child and Adolescent Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Luciana Hannibal
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Laboratory of Clinical Biochemistry and Metabolism, Medical Center, University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Ute Spiekerkoetter
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center-University of Freiburg, Faculty of Medicine, Freiburg, Germany
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Schumann A, Schaller K, Belche V, Cybulla M, Grünert SC, Moers N, Sass JO, Kaech A, Hannibal L, Spiekerkoetter U. Defective lysosomal storage in Fabry disease modifies mitochondrial structure, metabolism and turnover in renal epithelial cells. J Inherit Metab Dis 2021; 44:1039-1050. [PMID: 33661535 DOI: 10.1002/jimd.12373] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 02/13/2021] [Accepted: 03/02/2021] [Indexed: 12/16/2022]
Abstract
Fabry disease (FD) is an X-linked lysosomal storage disorder. Deficiency of the lysosomal enzyme alpha-galactosidase (GLA) leads to accumulation of potentially toxic globotriaosylceramide (Gb3) on a multisystem level. Cardiac and cerebrovascular abnormalities as well as progressive renal failure are severe, life-threatening long-term complications. The complete pathophysiology of chronic kidney disease (CKD) in FD and the role of tubular involvement for its progression are unclear. We established human renal tubular epithelial cell lines from the urine of male FD patients and male controls. The renal tubular system is rich in mitochondria and involved in transport processes at high-energy costs. Our studies revealed fragmented mitochondria with disrupted cristae structure in FD patient cells. Oxidative stress levels were elevated and oxidative phosphorylation was upregulated in FD pointing at enhanced energetic needs. Mitochondrial homeostasis and energy metabolism revealed major changes as evidenced by differences in mitochondrial number, energy production and fuel consumption. The changes were accompanied by activation of the autophagy machinery in FD. Sirtuin1, an important sensor of (renal) metabolic stress and modifier of different defense pathways, was highly expressed in FD. Our data show that lysosomal FD impairs mitochondrial function and results in severe disturbance of mitochondrial energy metabolism in renal cells. This insight on a tissue-specific level points to new therapeutic targets which might enhance treatment efficacy.
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Affiliation(s)
- Anke Schumann
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center-University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Kristin Schaller
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center-University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Véronique Belche
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center-University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Markus Cybulla
- Center of Internal Medicine, Department of Nephrology and Rheumatology, Fachinternistische Gemeinschaftspraxis Markgraeflerland, Muellheim, Germany
| | - Sarah C Grünert
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center-University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Nicolai Moers
- Department of Natural Sciences, Institute for Functional Gene Analytics (IFGA), Bonn-Rhein-Sieg University of Applied Sciences, Rheinbach, Germany
| | - Jörn O Sass
- Department of Natural Sciences, Institute for Functional Gene Analytics (IFGA), Bonn-Rhein-Sieg University of Applied Sciences, Rheinbach, Germany
| | - Andres Kaech
- Center for Microscopy and Image Analysis, University of Zurich, Zurich, Switzerland
| | - Luciana Hannibal
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Laboratory of Clinical Biochemistry and Metabolism, Medical Center-University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Ute Spiekerkoetter
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center-University of Freiburg, Faculty of Medicine, Freiburg, Germany
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Schumann A, Grasshoff H, Comduehr S, Riemekasten G. POS0335 THE POTENTIAL ROLE OF IL13 IN VASCULOPATHY IN SYSTEMIC SCLEROSIS PATIENTS. Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.3534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:Systemic sclerosis (SSc) is a heterogeneous disease characterized by fibrosis, vasculopathy and autoimmunity. Dysfunctions causing disease pathology are characterized by the activation and recruitment of immune cells, as well as the formation of autoantibodies and cytokines. Profibrotic cytokines, such as interleukin-(IL)13, IL4 or IL6 play a crucial role in collagen production and fibrosis development [1]. Preliminary data reveal IL13 as a main driver for obliterative vasculopathy characterized by severe Raynaud phenomenon, acral ulcers and pulmonary arterial hypertension (PAH). Particularly acral ulcerations lead to a severe impairment in functional capacity in everyday life. In addition, pulmonary arterial hypertension is one of the main causes of the high mortality rate in SSc [2].Objectives:To prove the impact of IL13 in the pathogenesis of systemic sclerosis and thus provide the rationale for the identification of a potential new therapeutic target, we investigated IL13 expression in CD4 and CD8 T cells in patients suffering from systemic sclerosis compared to healthy controls.Methods:Peripheral blood mononuclear cells (PBMC) obtained from systemic sclerosis (SSc, n=31) patients and healthy controls (HC, n=13) were cultured without or in the presence of phorbol myristate acetate and ionomycin to activate T cells for cytokine production. Brefeldin A was used as an inhibitor of cytokine secretion. The intracellular IL13 and IL4 expression of CD4 and CD8 positive T cells were measured by flow cytometry and were compared between the investigated subgroups.To identify a disease phenotype mediated by IL13, the expression levels in the SSc group were correlated to clinical, laboratory and apparative parameters assessing organ dysfunction.Results:While there were no significant differences in IL4 expression between healthy and diseased individuals, analyses of IL13 positive CD4 and CD8 T cells showed significant differences compared to HC (CD8+IL13 p=0.048; CD4+IL13 p=0.0046) revealing the functional differences though high structural homology of the two interleukins. The increased expression of IL13 in T cells from patients with systemic sclerosis further supports the assumption of an interleukin mediated pathomechanism. Considering the IL13-mediated clinical phenotype, high levels were detected in patients showing signs for vasculopathy, correlation with sPAP (CD8+IL13 p=0.0392), NTproBNP (CD4+IL13 p=0.0461), creatinine (CD4+IL13 p=0.0227), angiotensin II receptor type I and endothelin receptor type A antibodies (CD4+IL13 p=0.0105, p=0.0042) was demonstrated. In addition, patients in the fourth quartile of CD4+IL13 expression showed a higher incidence of acral ulcers and pits than patients with low interleukin levels. Moreover, this group of patients had an increased cardiovascular comorbidity including atherosclerosis, coronary heart disease and arterial hypertension.Conclusion:Increased IL13 levels could be detected in patients with SSc, especially in patients with the phenotype of an obliterative vasculopathy. This indicates preliminary evidence for the use of IL13 blockers as a new therapeutic approach in systemic sclerosis.References:[1]Furue M, Mitoma C, Mitoma H, Tsuji G, Chiba T, Nakahara T, Uchi H, Kadono T. Pathogenesis of systemic sclerosis-current concept and emerging treatments. Immunol Res. 2017 Aug;65(4):790-797. doi: 10.1007/s12026-017-8926-y.[2]Tyndall AJ, Bannert B, Vonk M, et alCauses and risk factors for death in systemic sclerosis: a study from the EULAR Scleroderma Trials and Research (EUSTAR) database Annals of the Rheumatic Diseases 2010;69:1809-1815. doi: 10.1136/ard.2009.114264Disclosure of Interests:None declared
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Sterner K, Fouodo CJK, König I, Künstner A, Busch H, Heidecke H, Schumann A, Müller A, Riemekasten G, Schinke S. OP0244 28 NEW AUTOANTIBODIES AGAINST GPCR, GROWTH FACTORS AND GROWTH FACTOR RECEPTORS ARE ASSOCIATED WITH DISEASE MANIFESTATIONS IN SYSTEMIC SCLEROSIS. Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.1504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:The morbidity and mortality of systemic sclerosis (SSc) are largely determined by vascular and fibrotic pathologies. Levels of autoantibodies (ab) against G protein-coupled receptors (GPCR), growth factors (GF) and growth factor receptors (GFR) are altered in SSc compared to healthy controls (HC) 1. Thus, higher angiotensin II receptor type 1 - (AT1R) and endothelin receptor type A - (ETAR) ab levels are associated with severe disease and SSc-related mortality 2. CXC motiv chemokine receptor 3 - (CXCR3) and 4 - (CXCR4) ab have predictive value for deterioration of pulmonary fibrosis (PF) 3.Objectives:We used statistical methods to identify associations between disease manifestations and 28 new ab directed against GPCR, GF and GFR in SSc.Methods:Ab against the following targets were measured in sera from SSc patients (n = 177) and HC (n = 88): Adrenoceptors alpha-1 (ADRA1), alpha-2 (ADRA2), beta-1 (ADRB1), beta-2 (ADRB2); muscarinoceptors 1-5 (M1R - M5R); AT1R, ETAR, endothelin B receptor (ETBR); CXCR3, CXCR4; complement receptors 3a (C3aR) and 5a (C5aR); protease-activated receptors 1 (PAR1) and 2 (PAR2); vascular endothelial growth factor A (VEGFA) and its receptors 1 (VEGFR1) and 2 (VEGFR2), epithelial growth factor (EGF)/ - receptor (EGFR); hepatocyte growth factor (HGF)/ - receptor (HGFR), platelet-derived growth factor-AA (PDGFAA), placental growth factor (PlGF).The organ involvement (PF, cardiac involvement, PAH, gastrointestinal tract) and quantitative markers (modified Rodnan skin score, SSc activity score, pulmonary function, cardiac enzymes and echocardiography, routine laboratory, autoimmune diagnostics) as well as demographic data were recorded retrospectively at the time of sample collection. Statistical analysis was performed using the Mann-Whitney U test (MWU), Pearson correlations, ROC analysis, and age-adjusted logistic regression models.Results:In SSc 20 of 28 measured ab levels are significantly altered compared to HC. According to the Pearson correlation matrix, the ab-levels are highly correlated and build a network that differs between HC and SSc. Furthermore, altered network signatures are formed in the differentiated analysis of several disease manifestations of SSc such as SSc-subtype or PF. Based on ROC analysis, FGF-ab, ADRB1-ab and PlGF-ab are well suited to predict SSc (Figure 1).In addition, limited cutaneous SSc (lSSc) patients displayed lower levels of most ab than diffuse cutaneous SSc patients, whereas cardiac and pulmonary involvement are associated with higher ab levels. In the logistic regression lSSc is associated with lower levels of ab against M1R, M2R, C5aR, ETAR, AT1R, PAR1, EGFR. Higher levels for ab against M1R, M2R, ETBR, C5aR are associated with PF, higher levels of ab against complement receptors, adrenoreceptors and EGF with NT-proBNP elevation.Conclusion:The newly described antibodies against GPCR, GF and GFR are highly correlated. Associations with morbidity- and mortality-determining organ involvement indicate their possible functional relevance and novel pathophysiological mechanisms. As new biomarkers, some of the ab have prognostic value for SSc; for other manifestations, their value should be evaluated in further studies.References:[1]Cabral-Marques, O., Marques, A., Giil, L.M. et al. GPCR-specific autoantibody signatures are associated with physiological and pathological immune homeostasis. Nat Commun9, 5224 (2018). https://doi.org/10.1038/s41467-018-07598-9[2]Riemekasten G, Philippe A, Näther M, et al. Involvement of functional autoantibodies against vascular receptors in systemic sclerosis Annals of the Rheumatic Diseases 2011;70:530-536.[3]Weigold, F., Günther, J., Pfeiffenberger, M. et al. Antibodies against chemokine receptors CXCR3 and CXCR4 predict progressive deterioration of lung function in patients with systemic sclerosis. Arthritis Res Ther 20, 52 (2018). https://doi.org/10.1186/s13075-018-1545-8Disclosure of Interests:Kristina Sterner: None declared, Césaire J. K. Fouodo: None declared, Inke König: None declared, Axel Künstner: None declared, Hauke Busch: None declared, Harald Heidecke Shareholder of: Owner of CellTrend, Anja Schumann: None declared, Antje Müller: None declared, Gabriela Riemekasten: None declared, Susanne Schinke Grant/research support from: UCB sponsors EULAR registration fees
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Grünert SC, Rosenbaum-Fabian S, Hannibal L, Schumann A, Spiekerkoetter U. Successful pregnancy in a woman with glycogen storage disease type 6. Mol Genet Metab Rep 2021; 27:100770. [PMID: 34026552 PMCID: PMC8129987 DOI: 10.1016/j.ymgmr.2021.100770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 04/30/2021] [Accepted: 05/01/2021] [Indexed: 11/28/2022] Open
Abstract
Glycogen storage disease type VI is caused by biallelic variants in the PYGL gene that result in hepatic glycogen phosphorylase deficiency. The disorder is clinically characterized by hepatomegaly and recurrent ketotic hypoglycemia from infancy. Although most patients reach adulthood without major complications, no pregnancies in women with GSD VI have been reported so far. We report on a successful pregnancy in a GSD VI patient that resulted in a healthy offspring and describe the pre- and perinatal management.
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Affiliation(s)
- Sarah Catharina Grünert
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Centre- University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106 Freiburg, Germany
| | - Stefanie Rosenbaum-Fabian
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Centre- University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106 Freiburg, Germany
| | - Luciana Hannibal
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Centre- University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106 Freiburg, Germany
| | - Anke Schumann
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Centre- University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106 Freiburg, Germany
| | - Ute Spiekerkoetter
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Centre- University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106 Freiburg, Germany
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Grünert SC, Hannibal L, Schumann A, Rosenbaum-Fabian S, Beck-Wödl S, Haack TB, Grimmel M, Bertrand M, Spiekerkoetter U. Identification and Characterization of a Novel Splice Site Mutation Associated with Glycogen Storage Disease Type VI in Two Unrelated Turkish Families. Diagnostics (Basel) 2021; 11:diagnostics11030500. [PMID: 33809020 PMCID: PMC7998545 DOI: 10.3390/diagnostics11030500] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 03/08/2021] [Accepted: 03/09/2021] [Indexed: 11/18/2022] Open
Abstract
Introduction: Glycogen storage disease type VI (GSD VI) is a disorder of glycogen metabolism due to mutations in the PYGL gene. Patients with GSD VI usually present with hepatomegaly, recurrent hypoglycemia, and short stature. Results: We report on two non-related Turkish patients with a novel homozygous splice site variant, c.345G>A, which was shown to lead to exon 2 skipping of the PYGL-mRNA by exome and transcriptome analysis. According to an in silico analysis, deletion Arg82_Gln115del is predicted to impair protein stability and possibly AMP binding. Conclusion: GSD VI is a possibly underdiagnosed disorder, and in the era of next generation sequencing, more and more patients with variants of unknown significance in the PYGL-gene will be identified. Techniques, such as transcriptome analysis, are important tools to confirm the pathogenicity and to determine therapeutic measures based on genetic results.
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Affiliation(s)
- Sarah C. Grünert
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Centre University of Freiburg, 79106 Freiburg, Germany; (A.S.); (S.R.-F.); (U.S.)
- Correspondence: ; Tel.: +49-761-270-43000; Fax: +49-761-270-45270
| | - Luciana Hannibal
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Paediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Centre-University of Freiburg, 79106 Freiburg, Germany;
| | - Anke Schumann
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Centre University of Freiburg, 79106 Freiburg, Germany; (A.S.); (S.R.-F.); (U.S.)
| | - Stefanie Rosenbaum-Fabian
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Centre University of Freiburg, 79106 Freiburg, Germany; (A.S.); (S.R.-F.); (U.S.)
| | - Stefanie Beck-Wödl
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, 72076 Tübingen, Germany; (S.B.-W.); (T.B.H.); (M.G.); (M.B.)
| | - Tobias B. Haack
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, 72076 Tübingen, Germany; (S.B.-W.); (T.B.H.); (M.G.); (M.B.)
- Center for Rare Diseases, University of Tübingen, 72076 Tübingen, Germany
| | - Mona Grimmel
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, 72076 Tübingen, Germany; (S.B.-W.); (T.B.H.); (M.G.); (M.B.)
| | - Miriam Bertrand
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, 72076 Tübingen, Germany; (S.B.-W.); (T.B.H.); (M.G.); (M.B.)
| | - Ute Spiekerkoetter
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Centre University of Freiburg, 79106 Freiburg, Germany; (A.S.); (S.R.-F.); (U.S.)
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Grünert SC, Foster W, Schumann A, Lund A, Pontes C, Roloff S, Weinhold N, Yue WW, AlAsmari A, Obaid OA, Faqeih EA, Stübbe L, Yamamoto R, Gemperle-Britschgi C, Walter M, Spiekerkoetter U, Mackinnon S, Sass JO. Succinyl-CoA:3-oxoacid coenzyme A transferase (SCOT) deficiency: A rare and potentially fatal metabolic disease. Biochimie 2021; 183:55-62. [PMID: 33596448 DOI: 10.1016/j.biochi.2021.02.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 02/03/2021] [Accepted: 02/03/2021] [Indexed: 12/23/2022]
Abstract
Succinyl-CoA:3-oxoacid coenzyme A transferase deficiency (SCOTD) is a rare autosomal recessive disorder of ketone body utilization caused by mutations in OXCT1. We performed a systematic literature search and evaluated clinical, biochemical and genetic data on 34 previously published and 10 novel patients with SCOTD. Structural mapping and in silico analysis of protein variants is also presented. All patients presented with severe ketoacidotic episodes. Age at first symptoms ranged from 36 h to 3 years (median 7 months). About 70% of patients manifested in the first year of life, approximately one quarter already within the neonatal period. Two patients died, while the remainder (95%) were alive at the time of the report. Almost all the surviving patients (92%) showed normal psychomotor development and no neurologic abnormalities. A total of 29 missense mutations are reported. Analysis of the published crystal structure of the human SCOT enzyme, paired with both sequence-based and structure-based methods to predict variant pathogenicity, provides insight into the biochemical consequences of the reported variants. Pathogenic variants cluster in SCOT protein regions that affect certain structures of the protein. The described pathogenic variants can be viewed in an interactive map of the SCOT protein at https://michelanglo.sgc.ox.ac.uk/r/oxct. This comprehensive data analysis provides a systematic overview of all cases of SCOTD published to date. Although SCOTD is a rather benign disorder with often favourable outcome, metabolic crises can be life-threatening or even fatal. As the diagnosis can only be made by enzyme studies or mutation analyses, SCOTD may be underdiagnosed.
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Affiliation(s)
- Sarah C Grünert
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany.
| | - William Foster
- Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Anke Schumann
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Allan Lund
- Department of Paediatrics, Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Christina Pontes
- Centre for Paediatrics and Adolescent Medicine, Heidelberg University Hospital, Heidelberg, Germany
| | - Sylvia Roloff
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Center for Chronically Sick Children, Berlin, Germany
| | - Natalie Weinhold
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Center for Chronically Sick Children, Berlin, Germany
| | - Wyatt W Yue
- Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Ali AlAsmari
- Children's Specialist Hospital, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Osama A Obaid
- Children's Specialist Hospital, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Eissa Ali Faqeih
- Children's Specialist Hospital, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Lisa Stübbe
- MVZ Dr. Eberhard & Partner Dortmund GbR (ÜBAG), Dortmund, Germany
| | - Raina Yamamoto
- MVZ Dr. Eberhard & Partner Dortmund GbR (ÜBAG), Dortmund, Germany
| | - Corinne Gemperle-Britschgi
- University Children's Hospital, Clinical Chemistry & Biochemistry and Children's Research Center, Zürich, Switzerland
| | - Melanie Walter
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Ute Spiekerkoetter
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Sabrina Mackinnon
- Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.
| | - Jörn Oliver Sass
- Research Group Inborn Errors of Metabolism, Department of Natural Sciences & Institute for Functional Gene Analytics (IFGA), Bonn-Rhein-Sieg University of Applied Sciences, Rheinbach, Germany.
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Dimitrov B, Molema F, Williams M, Schmiesing J, Mühlhausen C, Baumgartner MR, Schumann A, Kölker S. Organic acidurias: Major gaps, new challenges, and a yet unfulfilled promise. J Inherit Metab Dis 2021; 44:9-21. [PMID: 32412122 DOI: 10.1002/jimd.12254] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/29/2020] [Accepted: 05/12/2020] [Indexed: 12/12/2022]
Abstract
Organic acidurias (OADs) comprise a biochemically defined group of inherited metabolic diseases. Increasing awareness, reliable diagnostic work-up, newborn screening programs for some OADs, optimized neonatal and intensive care, and the development of evidence-based recommendations have improved neonatal survival and short-term outcome of affected individuals. However, chronic progression of organ dysfunction in an aging patient population cannot be reliably prevented with traditional therapeutic measures. Evidence is increasing that disease progression might be best explained by mitochondrial dysfunction. Previous studies have demonstrated that some toxic metabolites target mitochondrial proteins inducing synergistic bioenergetic impairment. Although these potentially reversible mechanisms help to understand the development of acute metabolic decompensations during catabolic state, they currently cannot completely explain disease progression with age. Recent studies identified unbalanced autophagy as a novel mechanism in the renal pathology of methylmalonic aciduria, resulting in impaired quality control of organelles, mitochondrial aging and, subsequently, progressive organ dysfunction. In addition, the discovery of post-translational short-chain lysine acylation of histones and mitochondrial enzymes helps to understand how intracellular key metabolites modulate gene expression and enzyme function. While acylation is considered an important mechanism for metabolic adaptation, the chronic accumulation of potential substrates of short-chain lysine acylation in inherited metabolic diseases might exert the opposite effect, in the long run. Recently, changed glutarylation patterns of mitochondrial proteins have been demonstrated in glutaric aciduria type 1. These new insights might bridge the gap between natural history and pathophysiology in OADs, and their exploitation for the development of targeted therapies seems promising.
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Affiliation(s)
- Bianca Dimitrov
- Division of Child Neurology and Metabolic Medicine, Centre for Child and Adolescent Medicine, University Hospital Heidelberg, Heidelberg, Germany
| | - Femke Molema
- Department of Pediatrics, Center for Lysosomal and Metabolic Diseases, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Monique Williams
- Department of Pediatrics, Center for Lysosomal and Metabolic Diseases, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Jessica Schmiesing
- Department of Pediatrics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Chris Mühlhausen
- Department of Pediatrics and Adolescent Medicine, University Medical Centre Göttingen, Göttingen, Germany
| | - Matthias R Baumgartner
- Division of Metabolism and Children's Research Center, University Children's Hospital, Zurich, Switzerland
| | - Anke Schumann
- Department of General Pediatrics, Center for Pediatrics and Adolescent Medicine, University Hospital of Freiburg, Freiburg, Germany
| | - Stefan Kölker
- Division of Child Neurology and Metabolic Medicine, Centre for Child and Adolescent Medicine, University Hospital Heidelberg, Heidelberg, Germany
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Grünert SC, Rosenbaum‐Fabian S, Hannibal L, Schumann A, Spiekerkötter U. Three successful pregnancies in a patient with glycogen storage disease type 0. JIMD Rep 2021; 57:38-43. [PMID: 33473338 PMCID: PMC7802628 DOI: 10.1002/jmd2.12178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/14/2020] [Accepted: 10/15/2020] [Indexed: 11/06/2022] Open
Abstract
Glycogen storage disease type 0 (GSD 0) is a rare inborn error of metabolism due to deficiency of the enzyme glycogen synthase (EC 2.4.1.11). The disorder is clinically characterized by ketotic fasting hypoglycemia in combination with postprandial hyperglycemia and hyperlactatemia. So far, only one pregnancy has been described in a woman with GSD 0. We report a 32-year-old GSD 0 patient with three successful pregnancies. The diagnosis of GSD 0 was made in early childhood due to characteristic symptoms. The patient had two healthy children at the time of her first visit in our metabolic center. The diet was optimized prior to her third pregnancy with a protein-rich diet including cornstarch and protein supplements. Pregnancy was confirmed at week 6 of gestation. Dietary management was difficult during pregnancy, especially in the first trimester due to severe nausea. Labor was induced at 37 weeks of gestation due to cholestasis of pregnancy, and the patient delivered a healthy baby girl. Perinatally, the mother received a high glucose infusion to stabilize blood glucose levels. The neonate also required a glucose infusion postnatally because of impaired glucose homeostasis. Similar to diabetic fetopathy, recurrent maternal hyperglycemia may result in hyperinsulinism of the child and trigger neonatal hypoglycemia. All four pregnancies in women with GSD 0 described to date occurred with minor complications and resulted in healthy offspring, which underpins the good prognosis and rather benign character of this rare metabolic disease. Careful monitoring during pregnancy and delivery is, however, necessary to minimize the risk of recurrent hypoglycemia for both mother and child.
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Affiliation(s)
- Sarah C. Grünert
- Department of General Paediatrics, Adolescent Medicine and NeonatologyMedical Centre‐University of Freiburg, Faculty of MedicineFreiburgGermany
| | - Stefanie Rosenbaum‐Fabian
- Department of General Paediatrics, Adolescent Medicine and NeonatologyMedical Centre‐University of Freiburg, Faculty of MedicineFreiburgGermany
| | - Luciana Hannibal
- Department of General Paediatrics, Adolescent Medicine and NeonatologyMedical Centre‐University of Freiburg, Faculty of MedicineFreiburgGermany
| | - Anke Schumann
- Department of General Paediatrics, Adolescent Medicine and NeonatologyMedical Centre‐University of Freiburg, Faculty of MedicineFreiburgGermany
| | - Ute Spiekerkötter
- Department of General Paediatrics, Adolescent Medicine and NeonatologyMedical Centre‐University of Freiburg, Faculty of MedicineFreiburgGermany
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Koczkodaj W, Liu F, Marek V, Mazurek J, Mazurek M, Mikhailov L, Özel C, Pedrycz W, Przelaskowski A, Schumann A, Smarzewski R, Strzalka D, Szybowski J, Yayli Y. On the use of group theory to generalize elements of pairwise comparisons matrix: A cautionary note. Int J Approx Reason 2020. [DOI: 10.1016/j.ijar.2020.05.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Grünert SC, Elling R, Maag B, Wortmann SB, Derks TGJ, Hannibal L, Schumann A, Rosenbaum-Fabian S, Spiekerkoetter U. Improved inflammatory bowel disease, wound healing and normal oxidative burst under treatment with empagliflozin in glycogen storage disease type Ib. Orphanet J Rare Dis 2020; 15:218. [PMID: 32838757 PMCID: PMC7446198 DOI: 10.1186/s13023-020-01503-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 08/09/2020] [Indexed: 01/05/2023] Open
Abstract
Background Glycogen storage disease type Ib (GSD Ib) is a rare inborn error of glycogen metabolism due to mutations in SLC37A4. Besides a severe form of fasting intolerance, the disorder is usually associated with neutropenia and neutrophil dysfunction causing serious infections, inflammatory bowel disease, oral, urogenital and perianal lesions as well as impaired wound healing. Recently, SGLT2 inhibitors such as empagliflozin that reduce the plasma levels of 1,5-anhydroglucitol have been described as a new treatment option for the neutropenia and neutrophil dysfunction in patients with GSD Ib. Results We report on a 35-year-old female patient with GSD Ib who had been treated with G-CSF for neutropenia since the age of 9. She had a large chronic abdominal wound as a consequence of recurrent operations due to complications of her inflammatory bowel disease. Treatment with 20 mg empagliflozin per day resulted in normalisation of the neutrophil count and neutrophil function even after termination of G-CSF. The chronic abdominal wound that had been unchanged for 2 years before the start of empagliflozin nearly closed within 12 weeks. No side effects of empagliflozin were observed. Conclusion SGLT2 inhibitors are a new and probably safe treatment option for GSD Ib-associated neutropenia and neutrophil dysfunction. We hypothesize that restoration of neutrophil function and normalisation of neutrophil apoptosis leads to improvement of wound healing and ameliorates symptoms of inflammatory bowel disease.
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Affiliation(s)
- Sarah C Grünert
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Centre- University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106, Freiburg, Germany.
| | - Roland Elling
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Centre- University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106, Freiburg, Germany
| | - Bärbel Maag
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Centre- University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106, Freiburg, Germany
| | - Saskia B Wortmann
- University Children's Hospital, Paracelsus Medical University (PMU), Salzburg, Austria.,Radboud Center for Mitochondrial Medicine, Department of Pediatrics, Amalia Children's Hospital, Radboudumc, Nijmegen, The Netherlands
| | - Terry G J Derks
- Section of Metabolic Diseases, Beatrix Children's Hospital, University Medical Centre Groningen, University of Groningen, Groningen, The Netherlands
| | - Luciana Hannibal
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Laboratory of Clinical Biochemistry and Metabolism, Medical Centre-University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Anke Schumann
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Centre- University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106, Freiburg, Germany
| | - Stefanie Rosenbaum-Fabian
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Centre- University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106, Freiburg, Germany
| | - Ute Spiekerkoetter
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Centre- University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106, Freiburg, Germany
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29
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Grünert SC, Tucci S, Schumann A, Schwendt M, Gramer G, Hoffmann GF, Erbel M, Stiller B, Spiekerkoetter U. Primary carnitine deficiency - diagnosis after heart transplantation: better late than never! Orphanet J Rare Dis 2020; 15:87. [PMID: 32276632 PMCID: PMC7146900 DOI: 10.1186/s13023-020-01371-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 03/31/2020] [Indexed: 12/30/2022] Open
Abstract
Background Primary carnitine deficiency due to mutations in the SLC22A5 gene is a rare but well-treatable metabolic disorder that puts patients at risk for metabolic decompensations, skeletal and cardiac myopathy and sudden cardiac death. Results We report on a 7-year-old boy diagnosed with primary carnitine deficiency 2 years after successful heart transplantation thanks his younger sister’s having been identified via expanded newborn screening during a pilot study evaluating an extension of the German newborn screening panel. Conclusion As L-carnitine supplementation can prevent and mostly reverse clinical symptoms of primary carnitine deficiency, all patients with cardiomyopathy should be investigated for primary carnitine deficiency even if newborn screening results were unremarkable.
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Affiliation(s)
- Sarah C Grünert
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Centre-University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106, Freiburg, Germany.
| | - Sara Tucci
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Centre-University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106, Freiburg, Germany
| | - Anke Schumann
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Centre-University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106, Freiburg, Germany
| | - Meike Schwendt
- Department of Congenital Heart Disease and Paediatric Cardiology, University Heart Centre Freiburg - Bad Krozingen, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Gwendolyn Gramer
- University Hospital Heidelberg, Centre for Paediatric and Adolescent Medicine, Division of Neuropediatrics and Metabolic Medicine, Im Neuenheimer Feld 430, 69120, Heidelberg, Germany
| | - Georg F Hoffmann
- University Hospital Heidelberg, Centre for Paediatric and Adolescent Medicine, Division of Neuropediatrics and Metabolic Medicine, Im Neuenheimer Feld 430, 69120, Heidelberg, Germany
| | - Michelle Erbel
- Institute of Pathology, Medical Centre-University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Brigitte Stiller
- Department of Congenital Heart Disease and Paediatric Cardiology, University Heart Centre Freiburg - Bad Krozingen, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Ute Spiekerkoetter
- Department of General Paediatrics, Adolescent Medicine and Neonatology, Medical Centre-University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106, Freiburg, Germany
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Luciani A, Schumann A, Berquez M, Chen Z, Nieri D, Failli M, Debaix H, Festa BP, Tokonami N, Raimondi A, Cremonesi A, Carrella D, Forny P, Kölker S, Camassei FD, Diaz F, Moraes CT, Di Bernardo D, Baumgartner MR, Devuyst O. Author Correction: Impaired mitophagy links mitochondrial disease to epithelial stress in methylmalonyl-CoA mutase deficiency. Nat Commun 2020; 11:1719. [PMID: 32238804 PMCID: PMC7113303 DOI: 10.1038/s41467-020-15565-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- Alessandro Luciani
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland.
| | - Anke Schumann
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland.,Division of Metabolism and Children's Research Center, University Children's Hospital, 8032, Zurich, Switzerland
| | - Marine Berquez
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland
| | - Zhiyong Chen
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland
| | - Daniela Nieri
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland
| | - Mario Failli
- Department of Biomedicine, University of Eastern Finland, 70211, Kuopio, Finland
| | - Huguette Debaix
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland
| | - Beatrice Paola Festa
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland
| | - Natsuko Tokonami
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland
| | - Andrea Raimondi
- San Raffaele Scientific Institute, Experimental Imaging Center, 20132, Milan, Italy
| | - Alessio Cremonesi
- Division of Clinical Chemistry and Biochemistry, University Children's Hospital Zurich, 8032, Zurich, Switzerland
| | - Diego Carrella
- Telethon Institute of Genetics and Medicine, Pozzuoli, 80078, Naples, Italy
| | - Patrick Forny
- Division of Metabolism and Children's Research Center, University Children's Hospital, 8032, Zurich, Switzerland
| | - Stefan Kölker
- Division of Inherited Metabolic Diseases, University Children's Hospital Heidelberg, 69120, Heidelberg, Germany
| | | | - Francisca Diaz
- Department of Neurology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Carlos T Moraes
- Department of Neurology, University of Miami Miller School of Medicine, Miami, FL, 33136, USA
| | - Diego Di Bernardo
- Telethon Institute of Genetics and Medicine, Pozzuoli, 80078, Naples, Italy
| | - Matthias R Baumgartner
- Division of Metabolism and Children's Research Center, University Children's Hospital, 8032, Zurich, Switzerland
| | - Olivier Devuyst
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland. .,Division of Nephrology, Cliniques Universitaires Saint-Luc, 1040, Brussels, Belgium.
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31
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Luciani A, Schumann A, Berquez M, Chen Z, Nieri D, Failli M, Debaix H, Festa BP, Tokonami N, Raimondi A, Cremonesi A, Carrella D, Forny P, Kölker S, Diomedi Camassei F, Diaz F, Moraes CT, Di Bernardo D, Baumgartner MR, Devuyst O. Impaired mitophagy links mitochondrial disease to epithelial stress in methylmalonyl-CoA mutase deficiency. Nat Commun 2020; 11:970. [PMID: 32080200 PMCID: PMC7033137 DOI: 10.1038/s41467-020-14729-8] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 01/28/2020] [Indexed: 01/09/2023] Open
Abstract
Deregulation of mitochondrial network in terminally differentiated cells contributes to a broad spectrum of disorders. Methylmalonic acidemia (MMA) is one of the most common inherited metabolic disorders, due to deficiency of the mitochondrial methylmalonyl-coenzyme A mutase (MMUT). How MMUT deficiency triggers cell damage remains unknown, preventing the development of disease-modifying therapies. Here we combine genetic and pharmacological approaches to demonstrate that MMUT deficiency induces metabolic and mitochondrial alterations that are exacerbated by anomalies in PINK1/Parkin-mediated mitophagy, causing the accumulation of dysfunctional mitochondria that trigger epithelial stress and ultimately cell damage. Using drug-disease network perturbation modelling, we predict targetable pathways, whose modulation repairs mitochondrial dysfunctions in patient-derived cells and alleviate phenotype changes in mmut-deficient zebrafish. These results suggest a link between primary MMUT deficiency, diseased mitochondria, mitophagy dysfunction and epithelial stress, and provide potential therapeutic perspectives for MMA.
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Affiliation(s)
- Alessandro Luciani
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland.
| | - Anke Schumann
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland
- Division of Metabolism and Children's Research Center, University Children's Hospital, 8032, Zurich, Switzerland
| | - Marine Berquez
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland
| | - Zhiyong Chen
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland
| | - Daniela Nieri
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland
| | - Mario Failli
- Department of Biomedicine, University of Eastern Finland, 70211, Kuopio, Finland
| | - Huguette Debaix
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland
| | - Beatrice Paola Festa
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland
| | - Natsuko Tokonami
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland
| | - Andrea Raimondi
- San Raffaele Scientific Institute, Experimental Imaging Center, 20132, Milan, Italy
| | - Alessio Cremonesi
- Division of Clinical Chemistry and Biochemistry, University Children's Hospital Zurich, 8032, Zurich, Switzerland
| | - Diego Carrella
- Telethon Institute of Genetics and Medicine, Pozzuoli, 80078, Naples, Italy
| | - Patrick Forny
- Division of Metabolism and Children's Research Center, University Children's Hospital, 8032, Zurich, Switzerland
| | - Stefan Kölker
- Division of Inherited Metabolic Diseases, University Children's Hospital Heidelberg, 69120, Heidelberg, Germany
| | | | - Francisca Diaz
- Department of Neurology, University of Miami Miller School of Medicine, 33136, Miami, FL, USA
| | - Carlos T Moraes
- Department of Neurology, University of Miami Miller School of Medicine, 33136, Miami, FL, USA
| | - Diego Di Bernardo
- Telethon Institute of Genetics and Medicine, Pozzuoli, 80078, Naples, Italy
| | - Matthias R Baumgartner
- Division of Metabolism and Children's Research Center, University Children's Hospital, 8032, Zurich, Switzerland
| | - Olivier Devuyst
- Institute of Physiology and NCCR Kidney.CH, University of Zurich, 8057, Zurich, Switzerland.
- Division of Nephrology, Cliniques Universitaires Saint-Luc, 1040, Brussels, Belgium.
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32
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Weigand K, Kawan F, Schumann A, Mohammed N, Lindner F, Fornara P. Rechts- oder linksseitige Donornephrektomie – ist das wirklich relevant? Urologe A 2020; 59:32-39. [DOI: 10.1007/s00120-019-01094-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Grünert SC, Marquardt T, Lausch E, Fuchs H, Thiel C, Sutter M, Schumann A, Hannibal L, Spiekerkoetter U. Unsuccessful intravenous D-mannose treatment in PMM2-CDG. Orphanet J Rare Dis 2019; 14:231. [PMID: 31640729 PMCID: PMC6805611 DOI: 10.1186/s13023-019-1213-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 09/24/2019] [Indexed: 01/13/2023] Open
Abstract
Background PMM2-CDG (Phosphomannomutase 2 - Congenital disorder of glycosylation-Ia; CDG-Ia) is the most common glycosylation defect, often presenting as a severe multisystem disorder that can be fatal within the first years of life. While mannose treatment has been shown to correct glycosylation in vitro and in vivo in mice, no convincing effects have been observed in short-term treatment trials in single patients so far. Results We report on a boy with a severe PMM2-CDG who received a continuous intravenous mannose infusion over a period of 5 months during the first year of life in a dose of 0.8 g/kg/day. N-glycosylation of serum glycoproteins and mannose concentrations in serum were studied regularly. Unfortunately, no biochemical or clinical improvement was observed, and the therapy was terminated at age 9 months. Conclusion Postnatal intravenous D-mannose treatment seems to be ineffective in PMM2-CDG.
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Affiliation(s)
- Sarah C Grünert
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center - University of Freiburg, Mathildenstraße 1, 79106, Freiburg, Germany.
| | - Thorsten Marquardt
- Department of General Pediatrics, University Children's Hospital Münster, Münster, Germany
| | - Ekkehart Lausch
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center - University of Freiburg, Mathildenstraße 1, 79106, Freiburg, Germany
| | - Hans Fuchs
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center - University of Freiburg, Mathildenstraße 1, 79106, Freiburg, Germany
| | - Christian Thiel
- Center for Child and Adolescent Medicine, Department I, University of Heidelberg, 69120, Heidelberg, Germany
| | - Martin Sutter
- Pharmacy Department, Faculty of Medicine, Medical Center - University of Freiburg, Freiburg, Germany
| | - Anke Schumann
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center - University of Freiburg, Mathildenstraße 1, 79106, Freiburg, Germany
| | - Luciana Hannibal
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center - University of Freiburg, Freiburg, Germany
| | - Ute Spiekerkoetter
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center - University of Freiburg, Mathildenstraße 1, 79106, Freiburg, Germany
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34
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Behringer S, Wingert V, Oria V, Schumann A, Grünert S, Cieslar-Pobuda A, Kölker S, Lederer AK, Jacobsen DW, Staerk J, Schilling O, Spiekerkoetter U, Hannibal L. Targeted Metabolic Profiling of Methionine Cycle Metabolites and Redox Thiol Pools in Mammalian Plasma, Cells and Urine. Metabolites 2019; 9:metabo9100235. [PMID: 31635306 PMCID: PMC6836102 DOI: 10.3390/metabo9100235] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/13/2019] [Accepted: 10/15/2019] [Indexed: 12/12/2022] Open
Abstract
The concentration of thiol and thioether metabolites in plasma has diagnostic value in genetic diseases of B-vitamin metabolism linked to methionine utilization. Among these, cysteine/cystine (Cys/CSSC) and glutathione/oxidized glutathione (GSH/GSSG) act as cellular redox buffers. A new LC-MS/MS method was developed for the simultaneous detection of cystathionine (Cysta), methionine (Met), methionine sulfoxide (MSO), creatinine and the reduced and oxidized pairs of homocysteine (Hcy/HSSH), cysteine (Cys/CSSC) and glutathione (GSH/GSSG). A one-step thiol-blocking protocol with minimal sample preparation was established to determine redox thiol pairs in plasma and cells. The concentrations of diagnostic biomarkers Hcy, Met, Cysta, and Cys in a cohort of healthy adults (n = 53) agreed with reference ranges and published values. Metabolite concentrations were also validated in commercial samples of human, mouse, rat and Beagle dog plasma and by the use of a standardized ERNDIM quality control. Analysis of fibroblasts, endothelial and epithelial cells, human embryonic stem cells, and cancer cell lines showed cell specificity for both the speciation and concentration of thiol and thioether metabolites. This LC-MS/MS platform permits the fast and simultaneous quantification of 10 thiol and thioether metabolites and creatinine using 40 µL plasma, urine or culture medium, or 500,000 cells. The sample preparation protocols are directly transferable to automated metabolomic platforms.
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Affiliation(s)
- Sidney Behringer
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
| | - Victoria Wingert
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
| | - Victor Oria
- Institute of Surgical Pathology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
- Spemann Graduate School of Biology and Medicine, Faculty of Biology, University of Freiburg, 79104 Freiburg, Germany.
| | - Anke Schumann
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
| | - Sarah Grünert
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
| | - Artur Cieslar-Pobuda
- Nordic European Molecular Laboratory (EMBL) Partnership, Centre for Molecular Medicine Norway, University of Oslo, 0318 Oslo, Norway.
| | - Stefan Kölker
- Center for Pediatrics and Adolescent Medicine, Division of Pediatric Neurology and Metabolic Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany.
| | - Ann-Kathrin Lederer
- Center for Complementary Medicine, Institute for Infection Prevention and Hospital Epidemiology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
| | - Donald W Jacobsen
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44106, USA.
| | - Judith Staerk
- Nordic European Molecular Laboratory (EMBL) Partnership, Centre for Molecular Medicine Norway, University of Oslo, 0318 Oslo, Norway.
- Norwegian Center for Stem Cell Research, Department of Immunology, Oslo University Hospital, 0372 Oslo, Norway.
| | - Oliver Schilling
- Institute of Surgical Pathology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
| | - Ute Spiekerkoetter
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
| | - Luciana Hannibal
- Laboratory of Clinical Biochemistry and Metabolism, Department of General Pediatrics, Adolescent Medicine and Neonatology, Faculty of Medicine, Medical Center, University of Freiburg, 79106 Freiburg, Germany.
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35
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Grünert SC, Rosenbaum-Fabian S, Schumann A, Schwab KO, Mingirulli N, Spiekerkoetter U. Successful pregnancy in maple syrup urine disease: a case report and review of the literature. Nutr J 2018; 17:51. [PMID: 29753318 PMCID: PMC5948788 DOI: 10.1186/s12937-018-0357-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 04/27/2018] [Indexed: 12/02/2022] Open
Abstract
Background Maple syrup urine disease (MSUD) is an autosomal recessive disorder of branched-chain amino acid metabolism. Patients with MSUD are at risk of life-threatening metabolic decompensations with ketoacidosis and encephalopathy. These episodes are often triggered by physiological stress. Only few cases of pregnancies in MSUD mothers have been reported so far. Case presentation We present the favorable outcome of a pregnancy in a woman with classical MSUD. She presented in the metabolic outpatient clinic in week 7 of gestation. Branched-chain amino acid concentrations were measured at least weekly to adjust dietary leucine intake. Despite excellent compliance, leucine concentrations frequently exceeded the target value of < 300 μmol/L during the first trimester. From the second trimester until delivery, protein and leucine intake increased continuously to about threefold compared to pre-pregnancy values. To maximize patient safety during delivery and the postpartum period, a detailed plan including peripartal infusion therapy, dietary recommendations and monitoring parameters was developed. Primary Caesarean section was performed in week 38 of gestation, and the patient gave birth to a healthy girl. Lactation was successfully implemented. Leucine levels were maintained within the target range throughout the complete postpartum period. In addition to our case, we give an overview about all cases of pregnancies in MSUD mothers published so far. Conclusions Management of pregnancy, delivery, postpartum period and lactation may be challenging in patients with MSUD. Careful monitoring and interdisciplinary collaboration is essential to minimize the risk of metabolic crisis, especially after delivery. Electronic supplementary material The online version of this article (10.1186/s12937-018-0357-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sarah Catharina Grünert
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center - University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106, Freiburg, Germany.
| | - Stefanie Rosenbaum-Fabian
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center - University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106, Freiburg, Germany
| | - Anke Schumann
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center - University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106, Freiburg, Germany
| | - Karl Otfried Schwab
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center - University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106, Freiburg, Germany
| | - Nadja Mingirulli
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center - University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106, Freiburg, Germany
| | - Ute Spiekerkoetter
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center - University of Freiburg, Faculty of Medicine, Mathildenstraße 1, 79106, Freiburg, Germany
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Rohling H, Priegnitz M, Schoene S, Schumann A, Enghardt W, Hueso-González F, Pausch G, Fiedler F. Requirements for a Compton camera forin vivorange verification of proton therapy. Phys Med Biol 2017; 62:2795-2811. [DOI: 10.1088/1361-6560/aa6068] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Abstract
Radiation cystitis (RC) is a common side-effect of radiation to the pelvis. Their clinical appearance as well as their degree of expression is manifold, as are the therapeutic options. However, in the absence of randomized examinations, recommendations are difficult. We differentiate between oral, systemic therapies, intravesical instillations and interventions as well as interventional, radiological and, as an ultima ratio, surgical treatments. This article provides an overview of the different treatment options with particular emphasis on the conservative-interventional therapy options.
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Affiliation(s)
- S Mühlstädt
- Universitätsklinik für Urologie und Nierentransplantation, Martin-Luther-Universität, Ernst-Grube-Straße 40, 06120, Halle/Saale, Deutschland.
| | - N Mohammed
- Universitätsklinik für Urologie und Nierentransplantation, Martin-Luther-Universität, Ernst-Grube-Straße 40, 06120, Halle/Saale, Deutschland
| | - K Weigand
- Universitätsklinik für Urologie und Nierentransplantation, Martin-Luther-Universität, Ernst-Grube-Straße 40, 06120, Halle/Saale, Deutschland
| | - A Schumann
- Universitätsklinik für Urologie und Nierentransplantation, Martin-Luther-Universität, Ernst-Grube-Straße 40, 06120, Halle/Saale, Deutschland
| | - F Kawan
- Universitätsklinik für Urologie und Nierentransplantation, Martin-Luther-Universität, Ernst-Grube-Straße 40, 06120, Halle/Saale, Deutschland
| | - C Göllert
- Universitätsklinik für Urologie und Nierentransplantation, Martin-Luther-Universität, Ernst-Grube-Straße 40, 06120, Halle/Saale, Deutschland
| | - P Fornara
- Universitätsklinik für Urologie und Nierentransplantation, Martin-Luther-Universität, Ernst-Grube-Straße 40, 06120, Halle/Saale, Deutschland
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Abstract
Objective: The study's aim was to examine the possibility to train phoneme-discrimination in noise with normal hearing adults, and its effectivity on speech recognition in noise. A specific computerised training program was used, consisting of special nonsense-syllables with background noise, to train participants' discrimination ability. Material and Methods: 46 normal hearing subjects took part in this study, 28 as training group participants, 18 as control group participants. Only the training group subjects were asked to train over a period of 3 weeks, twice a week for an hour with a computer-based training program. Speech recognition in noise were measured pre- to posttraining for the training group subjects with the Freiburger Einsilber Test. The control group subjects obtained test and restest measures within a 2-3 week break. For the training group follow-up speech recognition was measured 2-3 months after the end of the training. Results: The majority of training group subjects improved their phoneme discrimination significantly. Besides, their speech recognition in noise improved significantly during the training compared to the control group, and remained stable for a period of time. Conclusions: Phonem-Discrimination in noise can be trained by normal hearing adults. The improvements have got a positiv effect on speech recognition in noise, also for a longer period of time.
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Affiliation(s)
- A Schumann
- Audiologische Abteilung, -und Halschirugie, Hals-Nasen-Ohren-Klinik, Kopf Universitätsklinikum Erlangen, Erlangen
| | - L Garea Garcia
- Audiologische Abteilung, -und Halschirugie, Hals-Nasen-Ohren-Klinik, Kopf Universitätsklinikum Erlangen, Erlangen
| | - U Hoppe
- Audiologische Abteilung, -und Halschirugie, Hals-Nasen-Ohren-Klinik, Kopf Universitätsklinikum Erlangen, Erlangen
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Schumann A, Priegnitz M, Schoene S, Enghardt W, Rohling H, Fiedler F. From prompt gamma distribution to dose: a novel approach combining an evolutionary algorithm and filtering based on Gaussian-powerlaw convolutions. Phys Med Biol 2016; 61:6919-6934. [DOI: 10.1088/0031-9155/61/19/6919] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Forny P, Schumann A, Mustedanagic M, Mathis D, Wulf MA, Nägele N, Langhans CD, Zhakupova A, Heeren J, Scheja L, Fingerhut R, Peters HL, Hornemann T, Thony B, Kölker S, Burda P, Froese DS, Devuyst O, Baumgartner MR. Novel Mouse Models of Methylmalonic Aciduria Recapitulate Phenotypic Traits with a Genetic Dosage Effect. J Biol Chem 2016; 291:20563-73. [PMID: 27519416 DOI: 10.1074/jbc.m116.747717] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Indexed: 12/30/2022] Open
Abstract
Methylmalonic aciduria (MMAuria), caused by deficiency of methylmalonyl-CoA mutase (MUT), usually presents in the newborn period with failure to thrive and metabolic crisis leading to coma or even death. Survivors remain at risk of metabolic decompensations and severe long term complications, notably renal failure and neurological impairment. We generated clinically relevant mouse models of MMAuria using a constitutive Mut knock-in (KI) allele based on the p.Met700Lys patient mutation, used homozygously (KI/KI) or combined with a knockout allele (KO/KI), to study biochemical and clinical MMAuria disease aspects. Transgenic Mut(ki/ki) and Mut(ko/ki) mice survive post-weaning, show failure to thrive, and show increased methylmalonic acid, propionylcarnitine, odd chain fatty acids, and sphingoid bases, a new potential biomarker of MMAuria. Consistent with genetic dosage, Mut(ko/ki) mice have lower Mut activity, are smaller, and show higher metabolite levels than Mut(ki/ki) mice. Further, Mut(ko/ki) mice exhibit manifestations of kidney and brain damage, including increased plasma urea, impaired diuresis, elevated biomarkers, and changes in brain weight. On a high protein diet, mutant mice display disease exacerbation, including elevated blood ammonia, and catastrophic weight loss, which, in Mut(ki/ki) mice, is rescued by hydroxocobalamin treatment. This study expands knowledge of MMAuria, introduces the discovery of new biomarkers, and constitutes the first in vivo proof of principle of cobalamin treatment in mut-type MMAuria.
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Affiliation(s)
- Patrick Forny
- From the Division of Metabolism, the Children's Research Center, the radiz-Rare Disease Initiative Zurich, Clinical Research Priority Program for Rare Diseases, University of Zurich, 8006 Zurich, Switzerland, the Zurich Center for Integrative Human Physiology
| | - Anke Schumann
- From the Division of Metabolism, the Children's Research Center, the radiz-Rare Disease Initiative Zurich, Clinical Research Priority Program for Rare Diseases, University of Zurich, 8006 Zurich, Switzerland, the Institute of Physiology, University of Zurich, 8057 Zurich, Switzerland
| | | | - Déborah Mathis
- the Division of Clinical Chemistry and Biochemistry, and
| | | | - Nadine Nägele
- the Institute of Physiology, University of Zurich, 8057 Zurich, Switzerland
| | - Claus-Dieter Langhans
- the Division of Child Neurology and Inherited Metabolic Diseases, University Children's Hospital, 69120 Heidelberg, Germany
| | - Assem Zhakupova
- Institute of Clinical Chemistry, University Hospital Zurich, 8006 Zurich, Switzerland
| | - Joerg Heeren
- the Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany, and
| | - Ludger Scheja
- the Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany, and
| | - Ralph Fingerhut
- the Children's Research Center, the Swiss Newborn Screening Laboratory, University Children's Hospital Zurich, 8032 Zurich, Switzerland
| | - Heidi L Peters
- the Murdoch Children's Research Institute, Metabolic Research, Parkville, Victoria 3052, Australia
| | - Thorsten Hornemann
- the radiz-Rare Disease Initiative Zurich, Clinical Research Priority Program for Rare Diseases, University of Zurich, 8006 Zurich, Switzerland, Institute of Clinical Chemistry, University Hospital Zurich, 8006 Zurich, Switzerland
| | - Beat Thony
- From the Division of Metabolism, the Children's Research Center
| | - Stefan Kölker
- the Division of Child Neurology and Inherited Metabolic Diseases, University Children's Hospital, 69120 Heidelberg, Germany
| | - Patricie Burda
- From the Division of Metabolism, the Children's Research Center
| | - D Sean Froese
- From the Division of Metabolism, the Children's Research Center, the radiz-Rare Disease Initiative Zurich, Clinical Research Priority Program for Rare Diseases, University of Zurich, 8006 Zurich, Switzerland
| | - Olivier Devuyst
- the radiz-Rare Disease Initiative Zurich, Clinical Research Priority Program for Rare Diseases, University of Zurich, 8006 Zurich, Switzerland, the Zurich Center for Integrative Human Physiology, the Institute of Physiology, University of Zurich, 8057 Zurich, Switzerland
| | - Matthias R Baumgartner
- From the Division of Metabolism, the Children's Research Center, the radiz-Rare Disease Initiative Zurich, Clinical Research Priority Program for Rare Diseases, University of Zurich, 8006 Zurich, Switzerland, the Zurich Center for Integrative Human Physiology,
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Rohling H, Priegnitz M, Schoene S, Schumann A, Enghardt W, Golnik C, Hueso-González F, Kormoll T, Pausch G, Petzoldt J, Römer K, Fiedler F. Clinical applicability of the Compton camera for Prompt γ-ray Imaging during proton therapy. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)30185-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Than BLN, Linnekamp JF, Starr TK, Largaespada DA, Rod A, Zhang Y, Bruner V, Abrahante J, Schumann A, Luczak T, Walter J, Niemczyk A, O'Sullivan MG, Medema JP, Fijneman RJA, Meijer GA, Van den Broek E, Hodges CA, Scott PM, Vermeulen L, Cormier RT. CFTR is a tumor suppressor gene in murine and human intestinal cancer. Oncogene 2016; 35:4179-87. [PMID: 26751771 DOI: 10.1038/onc.2015.483] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 10/22/2015] [Accepted: 11/14/2015] [Indexed: 12/27/2022]
Abstract
CFTR, the cystic fibrosis (CF) gene, encodes for the CFTR protein that plays an essential role in anion regulation and tissue homeostasis of various epithelia. In the gastrointestinal (GI) tract CFTR promotes chloride and bicarbonate secretion, playing an essential role in ion and acid-base homeostasis. Cftr has been identified as a candidate driver gene for colorectal cancer (CRC) in several Sleeping Beauty DNA transposon-based forward genetic screens in mice. Further, recent epidemiological and clinical studies indicate that CF patients are at high risk for developing tumors in the colon. To investigate the effects of CFTR dysregulation on GI cancer, we generated Apc(Min) mice that carried an intestinal-specific knockout of Cftr. Our results indicate that Cftr is a tumor suppressor gene in the intestinal tract as Cftr mutant mice developed significantly more tumors in the colon and the entire small intestine. In Apc(+/+) mice aged to ~1 year, Cftr deficiency alone caused the development of intestinal tumors in >60% of mice. Colon organoid formation was significantly increased in organoids created from Cftr mutant mice compared with wild-type controls, suggesting a potential role of Cftr in regulating the intestinal stem cell compartment. Microarray data from the Cftr-deficient colon and the small intestine identified dysregulated genes that belong to groups of immune response, ion channel, intestinal stem cell and other growth signaling regulators. These associated clusters of genes were confirmed by pathway analysis using Ingenuity Pathway Analysis and gene set enrichment analysis (GSEA). We also conducted RNA Seq analysis of tumors from Apc(+/+) Cftr knockout mice and identified sets of genes dysregulated in tumors including altered Wnt β-catenin target genes. Finally we analyzed expression of CFTR in early stage human CRC patients stratified by risk of recurrence and found that loss of expression of CFTR was significantly associated with poor disease-free survival.
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Affiliation(s)
- B L N Than
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN, USA
| | - J F Linnekamp
- Laboratory of Experimental Oncology and Radiobiology, Center for Experimental Molecular Medicine, Academic Medical Center, Amsterdam, the Netherlands
| | - T K Starr
- Department of Genetics, Cell Biology and Development, Center for Genome Engineering, Masonic Cancer Center, University of Minnesota Medical School, Minneapolis, MN, USA.,Department of Obstetrics, Gynecology and Women's Health, Masonic Cancer Center, University of Minnesota Medical School, Minneapolis, MN, USA
| | - D A Largaespada
- Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN, USA
| | - A Rod
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN, USA
| | - Y Zhang
- University of Minnesota Supercomputing Institute, Minneapolis, MN, USA
| | - V Bruner
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN, USA
| | - J Abrahante
- Department of Genetics, Cell Biology and Development, Center for Genome Engineering, Masonic Cancer Center, University of Minnesota Medical School, Minneapolis, MN, USA
| | - A Schumann
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN, USA
| | - T Luczak
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN, USA
| | - J Walter
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN, USA
| | - A Niemczyk
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN, USA
| | - M G O'Sullivan
- College of Veterinary Medicine, University of Minnesota, St Paul, MN, USA
| | - J P Medema
- Laboratory of Experimental Oncology and Radiobiology, Center for Experimental Molecular Medicine, Academic Medical Center, Amsterdam, the Netherlands
| | - R J A Fijneman
- Department of Pathology, VU University Medical Center, Amsterdam, The Netherlands.,Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - G A Meijer
- Department of Pathology, VU University Medical Center, Amsterdam, The Netherlands.,Netherlands Cancer Institute, Amsterdam, the Netherlands
| | - E Van den Broek
- Department of Pathology, VU University Medical Center, Amsterdam, The Netherlands
| | - C A Hodges
- Department of Pediatrics, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - P M Scott
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN, USA
| | - L Vermeulen
- Laboratory of Experimental Oncology and Radiobiology, Center for Experimental Molecular Medicine, Academic Medical Center, Amsterdam, the Netherlands
| | - R T Cormier
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN, USA
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Ruppert T, Schumann A, Gröne HJ, Okun JG, Kölker S, Morath MA, Sauer SW. Molecular and biochemical alterations in tubular epithelial cells of patients with isolated methylmalonic aciduria. Hum Mol Genet 2015; 24:7049-59. [PMID: 26420839 DOI: 10.1093/hmg/ddv405] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 09/22/2015] [Indexed: 12/23/2022] Open
Abstract
Methylmalonic acidurias (MMAurias) are a group of inherited disorders in the catabolism of branched-chain amino acids, odd-chain fatty acids and cholesterol caused by complete or partial deficiency of methylmalonyl-CoA mutase (mut(0) and mut(-) subtype respectively) and by defects in the metabolism of its cofactor 5'-deoxyadenosylcobalamin (cblA, cblB or cblD variant 2 type). A long-term complication found in patients with mut(0) and cblB variant is chronic tubulointerstitial nephritis. The underlying pathomechanism has remained unknown. We established an in vitro model of tubular epithelial cells from patient urine (hTEC; 9 controls, 5 mut(0), 1 cblB). In all human tubular epithelial cell (hTEC) lines we found specific tubular markers (AQP1, UMOD, AQP2). Patient cells showed disturbance of energy metabolism in glycolysis, mitochondrial respiratory chain and Krebs cycle in concert with increased reactive oxygen species (ROS) formation. Electron micrographs indicated increased autophagosome production and endoplasmic reticulum stress, which was supported by positive acridine orange staining and elevated levels of LC3 II, P62 and pIRE1. Screening mTOR signaling revealed a release of inhibition of autophagy. Patient hTEC produced and secreted elevated amounts of the pro-inflammatory cytokine IL8, which was highly correlated with the acridine orange staining. Summarizing, hTEC of MMAuria patients are characterized by disturbed energy metabolism and ROS production that lead to increased autophagy and IL8 secretion.
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Affiliation(s)
- T Ruppert
- Department of General Pediatrics, Division of Neuropediatrics and Metabolic Medicine, University Children's Hospital Heidelberg, D-69120 Heidelberg, Germany
| | - A Schumann
- Department of General Pediatrics, Division of Neuropediatrics and Metabolic Medicine, University Children's Hospital Heidelberg, D-69120 Heidelberg, Germany, Division of Metabolism and Children's Research Center, University Children's Hospital, Zurich, Switzerland, Institute of Physiology, Center for Integrative Human Physiology, University of Zurich, Zurich, Switzerland and
| | - H J Gröne
- Department of Cellular and Molecular Pathology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - J G Okun
- Department of General Pediatrics, Division of Neuropediatrics and Metabolic Medicine, University Children's Hospital Heidelberg, D-69120 Heidelberg, Germany
| | - S Kölker
- Department of General Pediatrics, Division of Neuropediatrics and Metabolic Medicine, University Children's Hospital Heidelberg, D-69120 Heidelberg, Germany
| | - M A Morath
- Department of General Pediatrics, Division of Neuropediatrics and Metabolic Medicine, University Children's Hospital Heidelberg, D-69120 Heidelberg, Germany
| | - S W Sauer
- Department of General Pediatrics, Division of Neuropediatrics and Metabolic Medicine, University Children's Hospital Heidelberg, D-69120 Heidelberg, Germany,
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Affiliation(s)
- Olivier Devuyst
- Institute of Physiology, University of Zurich Zurich, Switzerland
| | - Anke Schumann
- Institute of Physiology, University of Zurich Zurich, Switzerland
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Schumann A, Petzoldt J, Dendooven P, Enghardt W, Golnik C, Hueso-González F, Kormoll T, Pausch G, Roemer K, Fiedler F. Simulation and experimental verification of prompt gamma-ray emissions during proton irradiation. Phys Med Biol 2015; 60:4197-207. [DOI: 10.1088/0031-9155/60/10/4197] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Tröger W, Galun D, Reif M, Schumann A, Stanković N, Milićević M. Viscum album [L.] extract therapy in patients with locally advanced or metastatic pancreatic cancer: a randomised clinical trial on overall survival. Eur J Cancer 2013; 49:3788-97. [PMID: 23890767 DOI: 10.1016/j.ejca.2013.06.043] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 06/20/2013] [Accepted: 06/28/2013] [Indexed: 12/15/2022]
Abstract
BACKGROUND The unfavourable side-effects of late-stage pancreatic cancer treatments call for non-toxic and effective therapeutic approaches. We compared the overall survival (OS) of patients receiving an extract of Viscum album [L.] (VaL) or no antineoplastic therapy. METHODS This is a prospective, parallel, open label, monocentre, group-sequential, randomised phase III study. Patients with locally advanced or metastatic cancer of the pancreas were stratified according to a binary prognosis index, composed of tumour stage, age and performance status; and were evenly randomised to subcutaneous injections of VaL extracts or no antineoplastic therapy (control). VaL was applied in a dose-escalating manner from 0.01 mg up to 10mg three times per week. Patients in both groups received best supportive care. The primary end-point was 12-month OS, assessed in a group-sequential analysis. FINDINGS We present the first interim analysis, including data from 220 patients. Baseline characteristics were well balanced between the study arms. Median OS was 4.8 for VaL and 2.7 months for control patients (prognosis-adjusted hazard ratio, HR=0.49; p<0.0001). Within the 'good' prognosis subgroup, median OS was 6.6 versus 3.2 months (HR=0.43; p<0.0001), within the 'poor' prognosis subgroup, it was 3.4 versus 2.0 months respectively (HR=0.55; p=0.0031). No VaL-related adverse events were observed. CONCLUSION VaL therapy showed a significant and clinically relevant prolongation of OS. The study findings suggest VaL to be a non-toxic and effective second-line therapy that offers a prolongation of OS as well as less disease-related symptoms for patients with locally advanced or metastatic pancreatic cancer.
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Affiliation(s)
- W Tröger
- Clinical Research Dr. Tröger, Freiburg, Germany.
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Schumann A, Kralisch C, Bär KJ. Interrelation of Cardiovascular Dysfunction and Pupillary Fluctuations in Patients with Major Depression. BIOMED ENG-BIOMED TE 2013; 58 Suppl 1:/j/bmte.2013.58.issue-s1-G/bmt-2013-4189/bmt-2013-4189.xml. [DOI: 10.1515/bmt-2013-4189] [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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Schumann A, Lenth C, Hasener J, Steckel V. Detection of volatile organic compounds from wood-based panels by gas chromatography-field asymmetric ion mobility spectrometry (GC-FAIMS). ACTA ACUST UNITED AC 2012. [DOI: 10.1007/s12127-012-0103-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
Together with cardiovascular disorders and metabolic changes, malignant diseases are considered as great challenges in clinical transplantation. As far as long-term function of transplanted organs is concerned, an impact of malignancies is obvious. However, it is important to distinguish between neoplastic disease originating from preexisting lesions in the transplanted organs and de novo graft tumors. Further, there is also a high risk of developing malignant disease during the dialysis, likely due to potential harmful metabolic changes associated with this procedure. After curative management of tumors in such patients, an interval of 2 years for surveillance should be adhered to before patients are put back on the waiting list. The overall risk of transmission of a malignant disease with the transplanted graft has been considered to be as low as <0.2%. In this context, and considering the continual shortage of donated organs, there is an international consensus about the use of kidney grafts with a history of small tumors (<2 cm in diameter und low-grade, i.e., G1). However, the lesions should have been removed with subsequent histopathologic characterization before the acceptance of the organ for transplantation. Early diagnosis and management of de novo malignant disease in transplant patients is crucial for the prognosis of graft function and patient survival. Genitourinary malignancies are frequent among de novo malignancies in transplanted patients. Thus, there is a need for clearly structured concepts for screening of transplant patients in order to detect early malignancies. The incidence of malignant disease correlates directly with the extent of immunosuppression in patients with end-stage renal disease (ESRD) on dialysis, as well as after transplantation with life-long immunosuppressant therapy. In addition, also geographic factors seem to play a role in the differential incidence of tumors among different populations. For instance, the highest incidence of malignancies among immunosuppressed patients has been observed in Australia followed by the USA and Europe. This might be due to the high incidence of de novo skin cancer, which has been linked to the extent of UV exposure.
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Affiliation(s)
- H Heynemann
- Universitätsklinik und Poliklinik für Urologie, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, Ernst-Grube-Strasse 40, 06120, Halle (Saale), Deutschland.
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Rüge J, Ulbricht S, Schumann A, Rumpf HJ, John U, Meyer C. Intention to quit smoking: is the partner's smoking status associated with the smoker's intention to quit? Int J Behav Med 2009; 15:328-35. [PMID: 19005933 DOI: 10.1080/10705500802365607] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND Smoking behavior among couples is often similar. PURPOSE The aim of the study was to examine the relationship between the partner's smoking status and the intention to stop smoking of the index person. METHOD Cross-sectional data of 1,044 patients in a random sample of 34 general medical practices in northeastern Germany were analyzed. RESULTS Among smokers with a non-smoking partner (SNP), more intended to quit smoking in the next six months (37.0% vs. 31.4%), compared to smokers with a smoking partner (SSP). Also, more SNP intended to quit in the next four weeks (4.7% vs. 2.7%) compared to SSP. SNP were more active in the use of self-change strategies than SSP. CONCLUSION The data confirm that the partner's smoking status is related to the intention to quit smoking. Interventions should address the different needs of both smokers with a smoking partner and those with a non-smoking partner.
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Affiliation(s)
- J Rüge
- Ernst-Moritz-Arndt-University Greifswald, Institute for Epidemiology and Social Medicine, Greifswald, Germany
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