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Rathod M, Franz H, Beyersdorfer V, Wanuske MT, Leal-Fischer K, Hanns P, Stüdle C, Zimmermann A, Buczak K, Schinner C, Spindler V. DPM1 modulates desmosomal adhesion and epidermal differentiation through SERPINB5. J Cell Biol 2024; 223:e202305006. [PMID: 38477878 PMCID: PMC10937187 DOI: 10.1083/jcb.202305006] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 11/30/2023] [Accepted: 01/23/2024] [Indexed: 03/14/2024] Open
Abstract
Glycosylation is essential to facilitate cell-cell adhesion and differentiation. We determined the role of the dolichol phosphate mannosyltransferase (DPM) complex, a central regulator for glycosylation, for desmosomal adhesive function and epidermal differentiation. Deletion of the key molecule of the DPM complex, DPM1, in human keratinocytes resulted in weakened cell-cell adhesion, impaired localization of the desmosomal components desmoplakin and desmoglein-2, and led to cytoskeletal organization defects in human keratinocytes. In a 3D organotypic human epidermis model, loss of DPM1 caused impaired differentiation with abnormally increased cornification, reduced thickness of non-corneal layers, and formation of intercellular gaps in the epidermis. Using proteomic approaches, SERPINB5 was identified as a DPM1-dependent interaction partner of desmoplakin. Mechanistically, SERPINB5 reduced desmoplakin phosphorylation at serine 176, which was required for strong intercellular adhesion. These results uncover a novel role of the DPM complex in connecting desmosomal adhesion with epidermal differentiation.
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Affiliation(s)
- Maitreyi Rathod
- Department of Biomedicine, University of Basel, Basel, Switzerland
- Institute of Anatomy and Experimental Morphology, University Clinic Hamburg-Eppendorf, Hamburg, Germany
| | - Henriette Franz
- Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Vivien Beyersdorfer
- Department of Biomedicine, University of Basel, Basel, Switzerland
- Institute of Anatomy and Experimental Morphology, University Clinic Hamburg-Eppendorf, Hamburg, Germany
| | | | | | - Pauline Hanns
- Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Chiara Stüdle
- Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Aude Zimmermann
- Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Katarzyna Buczak
- Proteomics Core Facility, Biocentre, University of Basel, Basel, Switzerland
| | - Camilla Schinner
- Department of Biomedicine, University of Basel, Basel, Switzerland
- Institute of Functional and Applied Anatomy, Hannover Medical School, Hannover, Germany
| | - Volker Spindler
- Department of Biomedicine, University of Basel, Basel, Switzerland
- Institute of Anatomy and Experimental Morphology, University Clinic Hamburg-Eppendorf, Hamburg, Germany
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2
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Schoch SF, Jaramillo V, Markovic A, Huber R, Kohler M, Jenni OG, Lustenberger C, Kurth S. Bedtime to the brain: how infants' sleep behaviours intertwine with non-rapid eye movement sleep electroencephalography features. J Sleep Res 2024; 33:e13936. [PMID: 37217191 DOI: 10.1111/jsr.13936] [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: 03/14/2023] [Revised: 04/24/2023] [Accepted: 05/02/2023] [Indexed: 05/24/2023]
Abstract
Adequate sleep is critical for development and facilitates the maturation of the neurophysiological circuitries at the basis of cognitive and behavioural function. Observational research has associated early life sleep problems with worse later cognitive, psychosocial, and somatic health outcomes. Yet, the extent to which day-to-day sleep behaviours (e.g., duration, regularity) in early life relate to non-rapid eye movement (NREM) neurophysiology-acutely and the long-term-remains to be studied. We measured sleep behaviours in 32 healthy 6-month-olds assessed with actimetry and neurophysiology with high-density electroencephalography (EEG) to investigate the association between NREM sleep and habitual sleep behaviours. Our study revealed four findings: first, daytime sleep behaviours are related to EEG slow-wave activity (SWA). Second, night-time movement and awakenings from sleep are connected with spindle density. Third, habitual sleep timing is linked to neurophysiological connectivity quantified as delta coherence. And lastly, delta coherence at 6 months predicts night-time sleep duration at 12 months. These novel findings widen our understanding that infants' sleep behaviours are closely intertwined with three particular levels of neurophysiology: sleep pressure (determined by SWA), the maturation of the thalamocortical system (spindles), and the maturation of cortical connectivity (coherence). The crucial next step is to extend this concept to clinical groups to objectively characterise infants' sleep behaviours 'at risk' that foster later neurodevelopmental problems.
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Affiliation(s)
- Sarah F Schoch
- Department of Pulmonology, University Hospital Zürich, Zürich, Switzerland
- Center of Competence Sleep and Health Zürich, University of Zürich, Zürich, Switzerland
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Valeria Jaramillo
- Department of Pulmonology, University Hospital Zürich, Zürich, Switzerland
- Center of Competence Sleep and Health Zürich, University of Zürich, Zürich, Switzerland
- Child Development Center, University Children's Hospital Zürich, Zürich, Switzerland
- Surrey Sleep Research Centre, Faculty of Health and Medical Sciences, University of Surrey, Guildford, UK
- Neuromodulation Laboratory, School of Psychology, University of Surrey, Guildford, UK
| | - Andjela Markovic
- Department of Pulmonology, University Hospital Zürich, Zürich, Switzerland
- Department of Psychology, University of Fribourg, Fribourg, Switzerland
| | - Reto Huber
- Center of Competence Sleep and Health Zürich, University of Zürich, Zürich, Switzerland
- Child Development Center, University Children's Hospital Zürich, Zürich, Switzerland
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric Hospital, University of Zürich, Zürich, Switzerland
| | - Malcolm Kohler
- Department of Pulmonology, University Hospital Zürich, Zürich, Switzerland
- Center of Competence Sleep and Health Zürich, University of Zürich, Zürich, Switzerland
| | - Oskar G Jenni
- Child Development Center, University Children's Hospital Zürich, Zürich, Switzerland
- Children's Research Center, University Children's Hospital Zürich, University of Zürich (UZH), Zürich, Switzerland
| | - Caroline Lustenberger
- Center of Competence Sleep and Health Zürich, University of Zürich, Zürich, Switzerland
- Neural Control of Movement Lab, Institute of Human Movement Sciences and Sport, Department of Health Sciences and Technology, ETH Zürich, Zürich, Switzerland
| | - Salome Kurth
- Department of Pulmonology, University Hospital Zürich, Zürich, Switzerland
- Center of Competence Sleep and Health Zürich, University of Zürich, Zürich, Switzerland
- Department of Psychology, University of Fribourg, Fribourg, Switzerland
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3
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Tsai YC, Hleihil M, Otomo K, Abegg A, Cavaccini A, Panzanelli P, Cramer T, Ferrari KD, Barrett MJP, Bosshard G, Karayannis T, Weber B, Tyagarajan SK, Stobart JL. The gephyrin scaffold modulates cortical layer 2/3 pyramidal neuron responsiveness to single whisker stimulation. Sci Rep 2024; 14:4169. [PMID: 38379020 PMCID: PMC10879104 DOI: 10.1038/s41598-024-54720-7] [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: 09/19/2023] [Accepted: 02/15/2024] [Indexed: 02/22/2024] Open
Abstract
Gephyrin is the main scaffolding protein at inhibitory postsynaptic sites, and its clusters are the signaling hubs where several molecular pathways converge. Post-translational modifications (PTMs) of gephyrin alter GABAA receptor clustering at the synapse, but it is unclear how this affects neuronal activity at the circuit level. We assessed the contribution of gephyrin PTMs to microcircuit activity in the mouse barrel cortex by slice electrophysiology and in vivo two-photon calcium imaging of layer 2/3 (L2/3) pyramidal cells during single-whisker stimulation. Our results suggest that, depending on the type of gephyrin PTM, the neuronal activities of L2/3 pyramidal neurons can be differentially modulated, leading to changes in the size of the neuronal population responding to the single-whisker stimulation. Furthermore, we show that gephyrin PTMs have their preference for selecting synaptic GABAA receptor subunits. Our results identify an important role of gephyrin and GABAergic postsynaptic sites for cortical microcircuit function during sensory stimulation.
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Affiliation(s)
- Yuan-Chen Tsai
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
- Center for Neuroscience Zurich (ZNZ), Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Mohammad Hleihil
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
- Center for Neuroscience Zurich (ZNZ), Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Kanako Otomo
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Andrin Abegg
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Anna Cavaccini
- Brain Research Institute, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Patrizia Panzanelli
- Department of Neuroscience Rita Levi Montalcini, University of Turin, Turin, Italy
| | - Teresa Cramer
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
- Center for Neuroscience Zurich (ZNZ), Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Kim David Ferrari
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
- Center for Neuroscience Zurich (ZNZ), Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Matthew J P Barrett
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
- Center for Neuroscience Zurich (ZNZ), Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Giovanna Bosshard
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Theofanis Karayannis
- Brain Research Institute, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Bruno Weber
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
- Center for Neuroscience Zurich (ZNZ), Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Shiva K Tyagarajan
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
- Center for Neuroscience Zurich (ZNZ), Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - Jillian L Stobart
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland.
- College of Pharmacy, University of Manitoba, Winnipeg, MB, R3E 0T5, Canada.
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Mühlematter C, Nielsen DS, Castro-Mejía JL, Brown SA, Rasch B, Wright KP, Walser JC, Schoch SF, Kurth S. Not simply a matter of parents-Infants' sleep-wake patterns are associated with their regularity of eating. PLoS One 2023; 18:e0291441. [PMID: 37796923 PMCID: PMC10553286 DOI: 10.1371/journal.pone.0291441] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 08/28/2023] [Indexed: 10/07/2023] Open
Abstract
In adults there are indications that regular eating patterns are related to better sleep quality. During early development, sleep and eating habits experience major maturational transitions. Further, the bacterial landscape of the gut microbiota undergoes a rapid increase in complexity. Yet little is known about the association between sleep, eating patterns and the gut microbiota. We first hypothesized that higher eating regularity is associated with more mature sleep patterns, and second, that this association is mediated by the maturational status of the gut microbiota. To test this hypothesis, we performed a longitudinal study in 162 infants to assess actigraphy, diaries of sleep and eating times, and stool microbiota composition at ages 3, 6 and 12 months. To comprehensively capture infants' habitual sleep-wake patterns, 5 sleep composites that characterize infants' sleep habits across multiple days in their home environment were computed. To assess timing of eating habits, we developed an Eating Regularity Index (ERI). Gut microbial composition was assessed by 16S rRNA gene amplicon sequencing, and its maturation was assessed based on alpha diversity, bacterial maturation index, and enterotype. First, our results demonstrate that increased eating regularity (higher ERI) in infants is associated with less time spent awake during the night (sleep fragmentation) and more regular sleep patterns. Second, the associations of ERI with sleep evolve with age. Third, the link between infant sleep and ERI remains significant when controlling for parents' subjectively rated importance of structuring their infant's eating and sleeping times. Finally, the gut microbial maturational markers did not account for the link between infant's sleep patterns and ERI. Thus, infants who eat more regularly have more mature sleep patterns, which is independent of the maturational status of their gut microbiota. Interventions targeting infant eating rhythm thus constitute a simple, ready-to-use anchor to improve sleep quality.
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Affiliation(s)
| | - Dennis S. Nielsen
- Department of Food Science, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Josue L. Castro-Mejía
- Department of Food Science, Faculty of Science, University of Copenhagen, Copenhagen, Denmark
| | - Steven A. Brown
- Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | - Björn Rasch
- Department of Psychology, University of Fribourg, Fribourg, Switzerland
| | - Kenneth P. Wright
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, Colorado, United States of America
| | | | - Sarah F. Schoch
- Donders Institute for Brain, Radboud University Medical Center, Nijmegen, Netherlands
| | - Salome Kurth
- Department of Psychology, University of Fribourg, Fribourg, Switzerland
- Department of Pulmonology, University Hospital Zurich, Zurich, Switzerland
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Aurich (-Schuler) T, van Dellen F, Labruyère R. The FreeD module's lateral translation timing in the gait robot Lokomat: a manual adaptation is necessary. J Neuroeng Rehabil 2023; 20:109. [PMID: 37596647 PMCID: PMC10439589 DOI: 10.1186/s12984-023-01227-3] [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: 06/15/2022] [Accepted: 07/27/2023] [Indexed: 08/20/2023] Open
Abstract
BACKGROUND Pelvic and trunk movements are often restricted in stationary robotic gait trainers. The optional FreeD module of the driven gait orthosis Lokomat offers a combined, guided lateral translation and transverse rotation of the pelvis and may therefore support weight shifting during walking. However, from clinical experience, it seems that the default setting of this timing does not correspond well with the timing of the physiological pelvic movement during the gait cycle. In the software, a manual adaptation of the lateral translation's timing with respect to the gait cycle is possible. The aim of this study was to investigate if such an offset is indeed present and if a manual adaptation by the therapist can improve the timing towards a more physiological pattern comparable to physiological overground walking. METHODS & RESULTS Children and adolescents with neurologic gait disorders and a Gross Motor Function Classification System level I-IV completed two different walking conditions (FreeD Default and FreeD Time Offset) in the Lokomat. The medio-lateral center of mass positions were calculated from RGB-Depth video recordings with a marker-less motion capture algorithm. Data of 22 patients (mean age: 12 ± 3 years) were analyzed. Kinematic analyses showed that in the FreeD Default condition, the maximum lateral center of mass excursion occurred too early. In the FreeD Time Offset condition, the manual adaptation by the therapists led to a delay of the maximum center of mass displacement by 8.2% in the first phase of the gait cycle and by 4.9% in the second phase of the gait cycle compared to the FreeD Default condition. The maximum lateral center of mass excursion was closer to that during physiological overground walking in the FreeD Time Offset condition than in the FreeD Default condition. CONCLUSION A manual adaptation of the timing of the FreeD module in the Lokomat shifts pelvis kinematics in a direction of physiological overground walking. We recommend therapists to use this FreeD Time Offset function to adjust the phase of weight shifting for each patient individually to optimize the kinematic walking pattern when a restorative therapy approach is adopted.
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Affiliation(s)
- Tabea Aurich (-Schuler)
- Children’s Research Center, University Children’s Hospital Zurich, Steinwiesstrasse 75, Zurich, CH-8032 Switzerland
- Swiss Children’s Rehab, University Children’s Hospital Zurich, Mühlebergstrasse 104, Affoltern am Albis, CH-8910 Switzerland
| | - Florian van Dellen
- Children’s Research Center, University Children’s Hospital Zurich, Steinwiesstrasse 75, Zurich, CH-8032 Switzerland
- Swiss Children’s Rehab, University Children’s Hospital Zurich, Mühlebergstrasse 104, Affoltern am Albis, CH-8910 Switzerland
- Sensory-Motor Systems Lab, Department of Health Sciences and Technology, ETH Zurich, Tannenstrasse 1, Zurich, CH-8092 Switzerland
| | - Rob Labruyère
- Children’s Research Center, University Children’s Hospital Zurich, Steinwiesstrasse 75, Zurich, CH-8032 Switzerland
- Swiss Children’s Rehab, University Children’s Hospital Zurich, Mühlebergstrasse 104, Affoltern am Albis, CH-8910 Switzerland
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Geiger M, Oppi S, Nusser-Stein S, Costantino S, Mohammed SA, Gorica E, Hoogerland JA, Matter CM, Guillaumon AT, Ruschitzka F, Paneni F, Oosterveer MH, Stein S. Genetic deletion of hepatic NCOR1 protects from atherosclerosis by promoting alternative bile acid-metabolism and sterol excretion. Cardiovasc Diabetol 2023; 22:144. [PMID: 37349757 PMCID: PMC10288794 DOI: 10.1186/s12933-023-01865-w] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 05/25/2023] [Indexed: 06/24/2023] Open
Abstract
BACKGROUND The nuclear receptor corepressor 1 (NCOR1) plays an important role in the regulation of gene expression in immunometabolic conditions by connecting chromatin-modifying enzymes, coregulators and transcription factors. NCOR1 has been shown to be involved in cardiometabolic diseases. Recently, we demonstrated that the deletion of macrophage NCOR1 aggravates atherosclerosis by promoting CD36-triggered foam cell formation via PPARG derepression. PURPOSE Since NCOR1 modulates the function of several key regulators involved in hepatic lipid and bile acid metabolism, we hypothesized that its deletion in hepatocytes alters lipid metabolism and atherogenesis. METHODS To test this hypothesis, we generated hepatocyte-specific Ncor1 knockout mice on a Ldlr-/- background. Besides assessing the progression of the disease in thoracoabdominal aortae en face, we analyzed hepatic cholesterol and bile acid metabolism at expression and functional levels. RESULTS Our data demonstrate that liver-specific Ncor1 knockout mice on an atherosclerosis-prone background develop less atherosclerotic lesions than controls. Interestingly, under chow diet, plasma cholesterol levels of liver-specific Ncor1 knockout mice were slightly higher compared to control, but strongly reduced compared to control mice after feeding them an atherogenic diet for 12 weeks. Moreover, the hepatic cholesterol content was decreased in liver-specific Ncor1 knockout compared to control mice. Our mechanistic data revealed that NCOR1 reprograms the synthesis of bile acids towards the alternative pathway, which in turn reduce bile hydrophobicity and enhances fecal cholesterol excretion. CONCLUSIONS Our data suggest that hepatic Ncor1 deletion in mice decreases atherosclerosis development by reprograming bile acid metabolism and enhancing fecal cholesterol excretion.
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Affiliation(s)
- Martin Geiger
- Center for Translational and Experimental Cardiology, University of Zurich, Schlieren, Switzerland.
| | - Sara Oppi
- Center for Translational and Experimental Cardiology, University of Zurich, Schlieren, Switzerland
| | - Stefanie Nusser-Stein
- Center for Translational and Experimental Cardiology, University of Zurich, Schlieren, Switzerland
| | - Sarah Costantino
- Center for Translational and Experimental Cardiology, University of Zurich, Schlieren, Switzerland
| | - Shafeeq Ahmed Mohammed
- Center for Translational and Experimental Cardiology, University of Zurich, Schlieren, Switzerland
| | - Era Gorica
- Center for Translational and Experimental Cardiology, University of Zurich, Schlieren, Switzerland
| | - Joanne A Hoogerland
- Department of Pediatrics, Center for Liver Digestive and Metabolic Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Christian M Matter
- Center for Translational and Experimental Cardiology, University of Zurich, Schlieren, Switzerland
- Department of Research and Education, University Hospital Zurich, CH-8091, Zurich, Switzerland
| | - Ana T Guillaumon
- Vascular Diseases Discipline, Clinics Hospital of the University of Campinas, Campinas, Brazil
| | - Frank Ruschitzka
- Center for Translational and Experimental Cardiology, University of Zurich, Schlieren, Switzerland
- Department of Cardiology, University Heart Center Zurich, University Hospital Zurich, CH-8091, Zurich, Switzerland
| | - Francesco Paneni
- Center for Translational and Experimental Cardiology, University of Zurich, Schlieren, Switzerland
- Department of Cardiology, University Heart Center Zurich, University Hospital Zurich, CH-8091, Zurich, Switzerland
- Department of Research and Education, University Hospital Zurich, CH-8091, Zurich, Switzerland
| | - Maaike H Oosterveer
- Department of Pediatrics, Center for Liver Digestive and Metabolic Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Department of Laboratory Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Sokrates Stein
- Center for Translational and Experimental Cardiology, University of Zurich, Schlieren, Switzerland.
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Abstract
Intracellular G protein-coupled receptors (GPCRs) can be activated by permeant ligands, which contributes to agonist selectivity. Opioid receptors (ORs) provide a notable example, where opioid drugs rapidly activate ORs in the Golgi apparatus. Our knowledge on intracellular GPCR function remains incomplete, and it is unknown whether OR signaling in plasma membrane (PM) and Golgi apparatus differs. Here, we assess the recruitment of signal transducers to mu- and delta-ORs in both compartments. We find that Golgi ORs couple to Gαi/o probes and are phosphorylated but, unlike PM receptors, do not recruit β-arrestin or a specific Gα probe. Molecular dynamics simulations with OR-transducer complexes in bilayers mimicking PM or Golgi composition reveal that the lipid environment promotes the location-selective coupling. We then show that delta-ORs in PM and Golgi have distinct effects on transcription and protein phosphorylation. The study reveals that the subcellular location defines the signaling effects of opioid drugs.
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Affiliation(s)
| | - Lucie Oberhauser
- Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland
| | - Simone Aureli
- Department of Pharmaceutical Sciences, University of Geneva, Geneva, Switzerland
- Institute of Pharmaceutical Sciences of Western Switzerland (ISPSO), University of Geneva, Geneva, Switzerland
- Swiss Institute of Bioinformatics, University of Geneva, CH-1206, Geneva, Switzerland
| | - Francesco Luigi Gervasio
- Department of Pharmaceutical Sciences, University of Geneva, Geneva, Switzerland
- Institute of Pharmaceutical Sciences of Western Switzerland (ISPSO), University of Geneva, Geneva, Switzerland
- Swiss Institute of Bioinformatics, University of Geneva, CH-1206, Geneva, Switzerland
- Department of Chemistry, University College London, London WC1E 6BT, UK
| | - Miriam Stoeber
- Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland
- Corresponding author.
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Petrenko V, Sinturel F, Loizides-Mangold U, Montoya JP, Chera S, Riezman H, Dibner C. Type 2 diabetes disrupts circadian orchestration of lipid metabolism and membrane fluidity in human pancreatic islets. PLoS Biol 2022; 20:e3001725. [PMID: 35921354 PMCID: PMC9348689 DOI: 10.1371/journal.pbio.3001725] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 01/25/2022] [Accepted: 06/24/2022] [Indexed: 11/18/2022] Open
Abstract
Recent evidence suggests that circadian clocks ensure temporal orchestration of lipid homeostasis and play a role in pathophysiology of metabolic diseases in humans, including type 2 diabetes (T2D). Nevertheless, circadian regulation of lipid metabolism in human pancreatic islets has not been explored. Employing lipidomic analyses, we conducted temporal profiling in human pancreatic islets derived from 10 nondiabetic (ND) and 6 T2D donors. Among 329 detected lipid species across 8 major lipid classes, 5% exhibited circadian rhythmicity in ND human islets synchronized in vitro. Two-time point-based lipidomic analyses in T2D human islets revealed global and temporal alterations in phospho- and sphingolipids. Key enzymes regulating turnover of sphingolipids were rhythmically expressed in ND islets and exhibited altered levels in ND islets bearing disrupted clocks and in T2D islets. Strikingly, cellular membrane fluidity, measured by a Nile Red derivative NR12S, was reduced in plasma membrane of T2D diabetic human islets, in ND donors’ islets with disrupted circadian clockwork, or treated with sphingolipid pathway modulators. Moreover, inhibiting the glycosphingolipid biosynthesis led to strong reduction of insulin secretion triggered by glucose or KCl, whereas inhibiting earlier steps of de novo ceramide synthesis resulted in milder inhibitory effect on insulin secretion by ND islets. Our data suggest that circadian clocks operative in human pancreatic islets are required for temporal orchestration of lipid homeostasis, and that perturbation of temporal regulation of the islet lipid metabolism upon T2D leads to altered insulin secretion and membrane fluidity. These phenotypes were recapitulated in ND islets bearing disrupted clocks.
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Affiliation(s)
- Volodymyr Petrenko
- Thoracic and Endocrine Surgery Division, Department of Surgery, University Hospital of Geneva, Geneva, Switzerland
- Department of Cell Physiology and Metabolism, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Institute of Genetics and Genomics in Geneva (iGE3), Geneva, Switzerland
| | - Flore Sinturel
- Thoracic and Endocrine Surgery Division, Department of Surgery, University Hospital of Geneva, Geneva, Switzerland
- Department of Cell Physiology and Metabolism, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Institute of Genetics and Genomics in Geneva (iGE3), Geneva, Switzerland
| | - Ursula Loizides-Mangold
- Thoracic and Endocrine Surgery Division, Department of Surgery, University Hospital of Geneva, Geneva, Switzerland
- Department of Cell Physiology and Metabolism, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Institute of Genetics and Genomics in Geneva (iGE3), Geneva, Switzerland
| | - Jonathan Paz Montoya
- Proteomics Core Facility, EPFL, Lausanne, Switzerland
- Institute of Bioengineering, School of Life Sciences, EPFL, Lausanne, Switzerland
| | - Simona Chera
- Thoracic and Endocrine Surgery Division, Department of Surgery, University Hospital of Geneva, Geneva, Switzerland
- Department of Cell Physiology and Metabolism, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Institute of Genetics and Genomics in Geneva (iGE3), Geneva, Switzerland
- Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Howard Riezman
- Department of Biochemistry, Faculty of Science, NCCR Chemical Biology, University of Geneva, Geneva, Switzerland
| | - Charna Dibner
- Thoracic and Endocrine Surgery Division, Department of Surgery, University Hospital of Geneva, Geneva, Switzerland
- Department of Cell Physiology and Metabolism, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Institute of Genetics and Genomics in Geneva (iGE3), Geneva, Switzerland
- * E-mail:
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Fraga-González G, Di Pietro SV, Pleisch G, Walitza S, Brandeis D, Karipidis II, Brem S. Visual Occipito-Temporal N1 Sensitivity to Digits Across Elementary School. Front Hum Neurosci 2022; 16:887413. [PMID: 35959243 PMCID: PMC9360418 DOI: 10.3389/fnhum.2022.887413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 06/20/2022] [Indexed: 11/15/2022] Open
Abstract
Number processing abilities are important for academic and personal development. The course of initial specialization of ventral occipito-temporal cortex (vOTC) sensitivity to visual number processing is crucial for the acquisition of numeric and arithmetic skills. We examined the visual N1, the electrophysiological correlate of vOTC activation across five time points in kindergarten (T1, mean age 6.60 years), middle and end of first grade (T2, 7.38 years; T3, 7.68 years), second grade (T4, 8.28 years), and fifth grade (T5, 11.40 years). A combination of cross-sectional and longitudinal EEG data of a total of 62 children (35 female) at varying familial risk for dyslexia were available to form groups of 23, 22, 27, 27, and 42 participants for each of the five time points. The children performed a target detection task which included visual presentation of single digits (DIG), false fonts (FF), and letters (LET) to derive measures for coarse (DIG vs. FF) and fine (DIG vs. LET) digit sensitive processing across development. The N1 amplitude analyses indicated coarse and fine sensitivity characterized by a stronger N1 to digits than false fonts across all five time points, and stronger N1 to digits than letters at all but the second (T2) time point. In addition, lower arithmetic skills were associated with stronger coarse N1 digit sensitivity over the left hemisphere in second grade (T4), possibly reflecting allocation of more attentional resources or stronger reliance on the verbal system in children with poorer arithmetic skills. To summarize, our results show persistent visual N1 sensitivity to digits that is already present early on in pre-school and remains stable until fifth grade. This pattern of digit sensitivity development clearly differs from the relatively sharp rise and fall of the visual N1 sensitivity to words or letters between kindergarten and middle of elementary school and suggests unique developmental trajectories for visual processing of written characters that are relevant to numeracy and literacy.
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Affiliation(s)
- Gorka Fraga-González
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Sarah V. Di Pietro
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland
| | - Georgette Pleisch
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland
| | - Susanne Walitza
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland
| | - Daniel Brandeis
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland
- MR-Center, Psychiatric University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Iliana I. Karipidis
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland
- Center for Interdisciplinary Brain Sciences Research, Stanford University School of Medicine, Stanford, CA, United States
| | - Silvia Brem
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric University Hospital Zurich, University of Zurich, Zurich, Switzerland
- Neuroscience Center Zurich, University of Zurich and ETH Zurich, Zurich, Switzerland
- MR-Center, Psychiatric University Hospital Zurich, University of Zurich, Zurich, Switzerland
- *Correspondence: Silvia Brem,
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10
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Abstract
Mucosal-associated invariant T cells or MAIT cells are an abundant cell type in humans and especially so in the liver. MAIT cells are a subset of T lymphocytes that sit at a bridge between innate and adaptive immunity, so-called innate-like or "unconventional" T cells. The specificity of their antigen receptor (T cell receptor or TCR) is for the conserved major histocompatibility complex (MHC)-related molecule MR1, which presents a modified bacterial metabolite from the vitamin B2 biosynthesis pathway - this allows them to respond in the presence of many bacteria or yeast. MAIT cells also possess an array of cytokine receptors, which allows triggering independently of the TCR. The combination of such signals drives their functionality - this means they can respond to a range of stimuli and likely play a role not only in infection or inflammation, but also under homeostatic conditions.In this review, we will look at the question of what MAIT cells are doing in the normal liver and how they behave in the setting of disease. These questions are of relevance because MAIT cells are such a distinctive cell type enriched in the liver under normal conditions, and their modulation could be of therapeutic benefit. The recent discovery that they appear to be involved in liver fibrosis is particularly of interest in this context.
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Affiliation(s)
- Hema Mehta
- Peter Medawar Building for Pathogen Research, Nuffield Department of Medicine, University of Oxford, South Parks Rd, Oxford, OX1 3SY, UK
| | - Martin Joseph Lett
- Liver Immunology, Department of Biomedicine, University Hospital Basel and University of Basel, Basel, Switzerland
| | - Paul Klenerman
- Peter Medawar Building for Pathogen Research, Nuffield Department of Medicine, University of Oxford, South Parks Rd, Oxford, OX1 3SY, UK.
- Translational Gastroenterology Unit, John Radcliffe Hospital, Oxford, OX3 9DU, UK.
| | - Magdalena Filipowicz Sinnreich
- Liver Immunology, Department of Biomedicine, University Hospital Basel and University of Basel, Basel, Switzerland
- Department of Gastroenterology and Hepatology, Basel University Medical Clinic, Cantonal Hospital Baselland, Liestal, Switzerland
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11
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Sartoretti T, Ganley RP, Ni R, Freund P, Zeilhofer HU, Klohs J. Structural MRI Reveals Cervical Spinal Cord Atrophy in the P301L Mouse Model of Tauopathy: Gender and Transgene-Dosing Effects. Front Aging Neurosci 2022; 14:825996. [PMID: 35585865 PMCID: PMC9108240 DOI: 10.3389/fnagi.2022.825996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 03/24/2022] [Indexed: 11/13/2022] Open
Abstract
In primary tauopathies, the deposition of tau neurofibrillary tangles and threads as well as neurodegenerative changes have been found within the brain and spinal cord. While degenerative changes have been intensively studied in the brain using structural magnetic resonance imaging (MRI), MRI studies investigating the spinal cord are still scarce. In the present study, we acquired ex vivo high resolution structural MRI of the cervical spinal cord of 8.5–9 month old hemizygous and homozygous P301L mice and non-transgenic littermates of both genders. We assessed the total cross-sectional area, and the gray and white matter anterior-posterior width and left-right width that are established imaging marker of spinal cord degeneration. We observed significant tissue-specific reductions in these parameters in female P301L mice that were stronger in homozygous than in hemizygous P301L mice, indicating both an effect of gender and transgene expression on cervical spinal cord atrophy. Moreover, atrophy was stronger in the gray matter than in the white matter. Immunohistochemical analysis revealed neurodegenerative and neuroinflammatory changes in the cervical spinal cord in both the gray and white matter of P301L mice. Collectively, our results provide evidence for cervical spinal cord atrophy that may directly contribute to the motor signs associated with tauopathy.
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Affiliation(s)
- Thomas Sartoretti
- Institute for Biomedical Engineering, ETH & University of Zurich, Zurich, Switzerland
| | - Robert P. Ganley
- Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | - Ruiqing Ni
- Institute for Biomedical Engineering, ETH & University of Zurich, Zurich, Switzerland
- Zurich Neuroscience Center (ZNZ), Zurich, Switzerland
| | - Patrick Freund
- Zurich Neuroscience Center (ZNZ), Zurich, Switzerland
- Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - Hanns Ulrich Zeilhofer
- Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
- Zurich Neuroscience Center (ZNZ), Zurich, Switzerland
- Institute for Pharmaceutical Sciences, ETH Zurich, Zurich, Switzerland
| | - Jan Klohs
- Institute for Biomedical Engineering, ETH & University of Zurich, Zurich, Switzerland
- Zurich Neuroscience Center (ZNZ), Zurich, Switzerland
- *Correspondence: Jan Klohs
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12
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Michalak-Micka K, Klar AS, Dasargyri A, Biedermann T, Reichmann E, Moehrlen U. The influence of CD26 + and CD26 - fibroblasts on the regeneration of human dermo-epidermal skin substitutes. Sci Rep 2022; 12:1944. [PMID: 35121765 PMCID: PMC8816920 DOI: 10.1038/s41598-022-05309-5] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 01/04/2022] [Indexed: 11/15/2022] Open
Abstract
CD26, also known as dipeptidyl peptidase IV (DPPIV), is a multifunctional transmembrane protein playing a significant role in the cutaneous wound healing processes in the mouse skin. However, only scarce data are available regarding the distribution and function of this protein in the human skin. Therefore, the aim of this study was to investigate the impact of CD26 deficiency in human primary fibroblasts on the regeneration of human tissue-engineered skin substitutes in vivo. Dermo-epidermal skin analogs, based on collagen type I hydrogels, were populated either with human CD26+ or CD26knockout fibroblasts and seeded with human epidermal keratinocytes. These skin substitutes were transplanted onto the back of immune-incompetent rodents. Three weeks post-transplantation, the grafts were excised and analyzed with respect to specific epidermal and dermal maturation markers. For the first time, we show here that the expression of CD26 protein in human dermis is age-dependent. Furthermore, we prove that CD26+ fibroblasts are more active in the production of extracellular matrix (ECM) both in vitro and in vivo and are necessary to achieve rapid epidermal and dermal homeostasis after transplantation.
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Affiliation(s)
- Katarzyna Michalak-Micka
- Tissue Biology Research Unit, Department of Surgery, University Children's Hospital Zurich, University of Zurich, Steinwiesstrasse 75, 8032, Zurich, Switzerland
- Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Agnes S Klar
- Tissue Biology Research Unit, Department of Surgery, University Children's Hospital Zurich, University of Zurich, Steinwiesstrasse 75, 8032, Zurich, Switzerland
- Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Athanasia Dasargyri
- Tissue Biology Research Unit, Department of Surgery, University Children's Hospital Zurich, University of Zurich, Steinwiesstrasse 75, 8032, Zurich, Switzerland
- Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Thomas Biedermann
- Tissue Biology Research Unit, Department of Surgery, University Children's Hospital Zurich, University of Zurich, Steinwiesstrasse 75, 8032, Zurich, Switzerland
- Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Ernst Reichmann
- Tissue Biology Research Unit, Department of Surgery, University Children's Hospital Zurich, University of Zurich, Steinwiesstrasse 75, 8032, Zurich, Switzerland
- Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland
| | - Ueli Moehrlen
- Tissue Biology Research Unit, Department of Surgery, University Children's Hospital Zurich, University of Zurich, Steinwiesstrasse 75, 8032, Zurich, Switzerland.
- Children's Research Center, University Children's Hospital Zurich, Zurich, Switzerland.
- Department of Surgery, University Children's Hospital Zurich, University of Zurich, Zurich, Switzerland.
- University of Zurich, Zurich, Switzerland.
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13
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Kretschmer M, Gapp K. Deciphering the RNA universe in sperm in its role as a vertical information carrier. Environ Epigenet 2022; 8:dvac011. [PMID: 35633894 PMCID: PMC9134061 DOI: 10.1093/eep/dvac011] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 03/11/2022] [Accepted: 04/13/2022] [Indexed: 05/21/2023]
Abstract
The inheritance of neurophysiologic and neuropsychologic complex diseases can only partly be explained by the Mendelian concept of genetic inheritance. Previous research showed that both psychological disorders like post-traumatic stress disorder and metabolic diseases are more prevalent in the progeny of affected parents. This could suggest an epigenetic mode of transmission. Human studies give first insight into the scope of intergenerational influence of stressors but are limited in exploring the underlying mechanisms. Animal models have elucidated the mechanistic underpinnings of epigenetic transmission. In this review, we summarize progress on the mechanisms of paternal intergenerational transmission by means of sperm RNA in mouse models. We discuss relevant details for the modelling of RNA-mediated transmission, point towards currently unanswered questions and propose experimental considerations for tackling these questions.
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Affiliation(s)
- Miriam Kretschmer
- Department of Health Sciences and Technology, ETH Zurich, Laboratory of Molecular and Behavioral Neuroscience, Institute for Neuroscience, Winterthurerstrasse 190, Zurich 8057, Switzerland
- Neuroscience Centre Zurich, ETH Zurich and University of Zurich, Winterthurerstrasse 190, Zurich 8057, Switzerland
| | - Katharina Gapp
- *Correspondence address. Department of Health Sciences and Technology, Laboratory of Molecular and Behavioral Neuroscience, Y36 M 12, Winterthurerstrasse 190, Zurich 8057, Switzerland. Tel: +0041 44 633 85 89; E-mail:
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14
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Ingelfinger F, Krishnarajah S, Kramer M, Utz SG, Galli E, Lutz M, Zwicky P, Akarca AU, Jurado NP, Ulutekin C, Bamert D, Widmer CC, Piccoli L, Sallusto F, Núñez NG, Marafioti T, Schneiter D, Opitz I, Lanzavecchia A, Jung HH, De Feo D, Mundt S, Schreiner B, Becher B. Single-cell profiling of myasthenia gravis identifies a pathogenic T cell signature. Acta Neuropathol 2021; 141:901-915. [PMID: 33774709 PMCID: PMC8113175 DOI: 10.1007/s00401-021-02299-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 03/08/2021] [Accepted: 03/17/2021] [Indexed: 01/01/2023]
Abstract
Myasthenia gravis (MG) is an autoimmune disease characterized by impaired neuromuscular signaling due to autoantibodies targeting the acetylcholine receptor. Although its auto-antigens and effector mechanisms are well defined, the cellular and molecular drivers underpinning MG remain elusive. Here, we employed high-dimensional single-cell mass and spectral cytometry of blood and thymus samples from MG patients in combination with supervised and unsupervised machine-learning tools to gain insight into the immune dysregulation underlying MG. By creating a comprehensive immune map, we identified two dysregulated subsets of inflammatory circulating memory T helper (Th) cells. These signature ThCD103 and ThGM cells populated the diseased thymus, were reduced in the blood of MG patients, and were inversely correlated with disease severity. Both signature Th subsets rebounded in the blood of MG patients after surgical thymus removal, indicative of their role as cellular markers of disease activity. Together, this in-depth analysis of the immune landscape of MG provides valuable insight into disease pathogenesis, suggests novel biomarkers and identifies new potential therapeutic targets for treatment.
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Affiliation(s)
- Florian Ingelfinger
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
- Department of Neurology, University Hospital Zurich, Zurich, Switzerland
| | | | - Michael Kramer
- Institute for Research in Biomedicine, Università Della Svizzera Italiana, Bellinzona, Switzerland
| | - Sebastian G Utz
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Edoardo Galli
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Mirjam Lutz
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Pascale Zwicky
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Ayse U Akarca
- Department of Cellular Pathology, University College London Hospital, London, UK
| | | | - Can Ulutekin
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - David Bamert
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Corinne C Widmer
- Department of Medical Oncology and Hematology, University Hospital Zurich and University of Zurich, Zurich, Switzerland
| | - Luca Piccoli
- Institute for Research in Biomedicine, Università Della Svizzera Italiana, Bellinzona, Switzerland
| | - Federica Sallusto
- Institute for Research in Biomedicine, Università Della Svizzera Italiana, Bellinzona, Switzerland
- Institute of Microbiology, ETH Zurich, Zurich, Switzerland
| | - Nicolás G Núñez
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Teresa Marafioti
- Department of Cellular Pathology, University College London Hospital, London, UK
| | - Didier Schneiter
- Department of Thoracic Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Isabelle Opitz
- Department of Thoracic Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Antonio Lanzavecchia
- Institute for Research in Biomedicine, Università Della Svizzera Italiana, Bellinzona, Switzerland
| | - Hans H Jung
- Department of Neurology, University Hospital Zurich, Zurich, Switzerland
| | - Donatella De Feo
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Sarah Mundt
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Bettina Schreiner
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland.
- Department of Neurology, University Hospital Zurich, Zurich, Switzerland.
| | - Burkhard Becher
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland.
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15
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Schoch SF, Huber R, Kohler M, Kurth S. Which are the Central Aspects of Infant Sleep? The Dynamics of Sleep Composites across Infancy. Sensors (Basel) 2020; 20:E7188. [PMID: 33333904 PMCID: PMC7765288 DOI: 10.3390/s20247188] [Citation(s) in RCA: 12] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Revised: 12/11/2020] [Accepted: 12/12/2020] [Indexed: 02/07/2023]
Abstract
Sleep during infancy is important for the well-being of both infant and parent. Therefore, there is large interest in characterizing infant sleep with reliable tools, for example by combining actigraphy with 24-h-diaries. However, it is critical to select the right variables to characterize sleep. In a longitudinal investigation, we collected sleep data of 152 infants at ages 3, 6, and 12 months. Using principal component analysis, we identified five underlying sleep composites from 48 commonly-used sleep variables: Sleep Night, Sleep Day, Sleep Activity, Sleep Timing, and Sleep Variability. These composites accurately reflect known sleep dynamics throughout infancy as Sleep Day (representing naps), Sleep Activity (representing sleep efficiency and consolidation), and Sleep Variability (representing day-to-day stability) decrease across infancy, while Sleep Night (representing nighttime sleep) slightly increases, and Sleep Timing becomes earlier as one ages. We uncover interesting dynamics between the sleep composites and demonstrate that infant sleep is not only highly variable between infants but also dynamic within infants across time. Interestingly, Sleep Day is associated with behavioral development and therefore a potential marker for maturation. We recommend either the use of sleep composites or the core representative variables within each sleep composite for more reliable research.
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Affiliation(s)
- Sarah F. Schoch
- Department of Pulmonology, University Hospital Zurich, 8091 Zurich, Switzerland; (S.F.S.); (M.K.)
- Department of Psychology, University of Zurich, 8006 Zurich, Switzerland
| | - Reto Huber
- Child Development Center, University Children’s Hospital Zurich, 8032 Zurich, Switzerland;
- Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric Hospital, University of Zurich, 8008 Zurich, Switzerland
| | - Malcolm Kohler
- Department of Pulmonology, University Hospital Zurich, 8091 Zurich, Switzerland; (S.F.S.); (M.K.)
| | - Salome Kurth
- Department of Pulmonology, University Hospital Zurich, 8091 Zurich, Switzerland; (S.F.S.); (M.K.)
- Department of Psychology, University of Fribourg, 1700 Fribourg, Switzerland
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16
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Bengs S, Haider A, Warnock GI, Fiechter M, Pargaetzi Y, Rampidis G, Etter D, Wijnen WJ, Portmann A, Osto E, Treyer V, Benz DC, Meisel A, Fuchs TA, Gräni C, Buechel RR, Kaufmann PA, Pazhenkottil AP, Gebhard C. Quantification of perivascular inflammation does not provide incremental prognostic value over myocardial perfusion imaging and calcium scoring. Eur J Nucl Med Mol Imaging 2020; 48:1806-1812. [PMID: 33200300 PMCID: PMC8113311 DOI: 10.1007/s00259-020-05106-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 11/01/2020] [Indexed: 01/07/2023]
Abstract
Aims Perivascular fat attenuation index (FAI) has emerged as a novel coronary computed tomography angiography (CCTA)–based biomarker predicting cardiovascular outcomes by capturing early coronary inflammation. It is currently unknown whether FAI adds prognostic value beyond that provided by single-photon emission computed tomography myocardial perfusion imaging (SPECT-MPI) and CCTA findings including coronary artery calcium scoring (CACS). Methods and results A total of 492 patients (mean age 62.5 ± 10.8 years) underwent clinically indicated multimodality CCTA and electrocardiography (ECG)-gated 99mTc-tetrofosmin SPECT-MPI between May 2005 and December 2008 at our institution, and follow-up data on major adverse cardiovascular events (MACE) was obtained for 314 patients. FAI was obtained from CCTA images and was measured around the right coronary artery (FAI[RCA]), the left anterior descending artery (FAI[LAD]), and the left main coronary artery (FAI[LMCA]). During a median follow-up of 2.7 years, FAI[RCA] > − 70.1 was associated with an increased rate of MACE (log rank p = 0.049), while no such association was seen for FAI[LAD] or FAI[LMCA] (p = NS). A multivariate Cox regression model accounting for cardiovascular risk factors, CCTA and SPECT-MPI findings identified FAI[RCA] as an independent predictor of MACE (HR 2.733, 95% CI: 1.220–6.123, p = 0.015). However, FAI[RCA] was no longer a significant predictor of MACE after adding CACS (p = 0.279). A first-order interaction term consisting of sex and FAI[RCA] was significant in both models (HR 2.119, 95% CI: 1.218–3.686, p = 0.008; and HR 2.071, 95% CI: 1.111–3.861, p = 0.022). Conclusion FAI does not add incremental prognostic value beyond multimodality MPI/CCTA findings including CACS. The diagnostic value of FAI[RCA] is significantly biased by sex.
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Affiliation(s)
- Susan Bengs
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, 8952, Schlieren, Switzerland
| | - Ahmed Haider
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, 8952, Schlieren, Switzerland
| | - Geoffrey I Warnock
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, 8952, Schlieren, Switzerland
| | - Michael Fiechter
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, 8952, Schlieren, Switzerland
- Swiss Paraplegic Center, 6207, Nottwil, Switzerland
| | - Yves Pargaetzi
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, 8952, Schlieren, Switzerland
| | - Georgios Rampidis
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
| | - Dominik Etter
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, 8952, Schlieren, Switzerland
| | - Winandus J Wijnen
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, 8952, Schlieren, Switzerland
| | - Angela Portmann
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, 8952, Schlieren, Switzerland
| | - Elena Osto
- Institute of Clinical Chemistry, University of Zurich, 8091, Zurich, Switzerland
- University Heart Center, University Hospital Zurich, 8006, Zurich, Switzerland
| | - Valerie Treyer
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
- Institute for Regenerative Medicine, University of Zurich, 8952, Schlieren, Switzerland
| | - Dominik C Benz
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
| | - Alexander Meisel
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
- Center for Molecular Cardiology, University of Zurich, 8952, Schlieren, Switzerland
| | - Tobias A Fuchs
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
| | - Christoph Gräni
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
| | - Ronny R Buechel
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
| | - Philipp A Kaufmann
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
| | - Aju P Pazhenkottil
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland
- University Heart Center, University Hospital Zurich, 8006, Zurich, Switzerland
| | - Catherine Gebhard
- Department of Nuclear Medicine, University Hospital Zurich, 8091, Zurich, Switzerland.
- Center for Molecular Cardiology, University of Zurich, 8952, Schlieren, Switzerland.
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17
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Labouesse MA, Cola RB, Patriarchi T. GPCR-Based Dopamine Sensors-A Detailed Guide to Inform Sensor Choice for In vivo Imaging. Int J Mol Sci 2020; 21:E8048. [PMID: 33126757 PMCID: PMC7672611 DOI: 10.3390/ijms21218048] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 09/25/2020] [Accepted: 09/26/2020] [Indexed: 12/12/2022] Open
Abstract
Understanding how dopamine (DA) encodes behavior depends on technologies that can reliably monitor DA release in freely-behaving animals. Recently, red and green genetically encoded sensors for DA (dLight, GRAB-DA) were developed and now provide the ability to track release dynamics at a subsecond resolution, with submicromolar affinity and high molecular specificity. Combined with rapid developments in in vivo imaging, these sensors have the potential to transform the field of DA sensing and DA-based drug discovery. When implementing these tools in the laboratory, it is important to consider there is not a 'one-size-fits-all' sensor. Sensor properties, most importantly their affinity and dynamic range, must be carefully chosen to match local DA levels. Molecular specificity, sensor kinetics, spectral properties, brightness, sensor scaffold and pharmacology can further influence sensor choice depending on the experimental question. In this review, we use DA as an example; we briefly summarize old and new techniques to monitor DA release, including DA biosensors. We then outline a map of DA heterogeneity across the brain and provide a guide for optimal sensor choice and implementation based on local DA levels and other experimental parameters. Altogether this review should act as a tool to guide DA sensor choice for end-users.
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Affiliation(s)
- Marie A. Labouesse
- Department of Psychiatry, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA;
- Division of Molecular Therapeutics, New York State Psychiatric Institute, New York, NY 10032, USA
| | - Reto B. Cola
- Anatomy and Program in Neuroscience, University of Fribourg, 1700 Fribourg, Switzerland;
- Institute of Pharmacology and Toxicology, University of Zurich, 8057 Zurich, Switzerland
| | - Tommaso Patriarchi
- Institute of Pharmacology and Toxicology, University of Zurich, 8057 Zurich, Switzerland
- Neuroscience Center Zurich, University and ETH Zurich, 8057 Zurich, Switzerland
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Steinert RE, Rehman A, Souto Lima EJ, Agamennone V, Schuren FHJ, Gero D, Schreiner P, Vonlanthen R, Ismaeil A, Tzafos S, Hosa H, Vetter D, Misselwitz B, Bueter M. Roux-en-Y gastric bypass surgery changes fungal and bacterial microbiota in morbidly obese patients-A pilot study. PLoS One 2020; 15:e0236936. [PMID: 32735609 PMCID: PMC7394366 DOI: 10.1371/journal.pone.0236936] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [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: 01/26/2020] [Accepted: 07/16/2020] [Indexed: 02/07/2023] Open
Abstract
The Roux-en-Y gastric bypass (RYGB) remains the most effective treatment for morbidly obese patients to lower body weight and improve glycemic control. There is recent evidence that the mycobiome (fungal microbiome) can aggravate disease severity in a number of diseases including inflammatory bowel disease (IBD), irritable bowel syndrome (IBS) and hepatitis; moreover, a dysbiotic fungal microbiota has been reported in the obese. We characterized fungal and bacterial microbial composition in fecal samples of 16 morbidly obese patients before and three months after RYGB surgery and compared with nine healthy controls. We found that RYGB surgery induced a clear alteration in structure and composition of the gut fungal and bacterial microbiota. Beta diversity analysis revealed significant differences in bacterial microbiota between obese patients before surgery and healthy controls (P < 0.005) and a significant, unidirectional shift in RYGB patients after surgery (P < 0.001 vs. before surgery). In contrast, there was no significant difference in fungal microbiota between groups but individually specific changes after RYGB surgery. Interestingly, RYGB surgery induced a significant reduction in fungal alpha diversity namely Chao1, Sobs, and Shannon diversity index (P<0.05, respectively) which contrasts the trend for uniform changes in bacteria towards increased richness and diversity post-surgery. We did not observe any inter-kingdom relations in RYGB patients but in the healthy control cohort and there were several correlations between fungi and bacteria and clinical parameters (P<0.05, respectively) that warrant further research. Our study identifies changes in intestinal fungal communities in RYGB patients that are distinct to changes in the bacterial microbiota.
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Affiliation(s)
- Robert E. Steinert
- Department of Surgery, University Hospital Zürich, Zürich, Switzerland
- * E-mail:
| | - Ateequr Rehman
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Everton Job Souto Lima
- Microbiology and Systems Biology, The Netherlands Organization for Applied Scientific Research (TNO), Zeist, The Netherlands
| | - Valeria Agamennone
- Microbiology and Systems Biology, The Netherlands Organization for Applied Scientific Research (TNO), Zeist, The Netherlands
| | - Frank H. J. Schuren
- Microbiology and Systems Biology, The Netherlands Organization for Applied Scientific Research (TNO), Zeist, The Netherlands
| | - Daniel Gero
- Department of Surgery, University Hospital Zürich, Zürich, Switzerland
| | - Phillip Schreiner
- Department of Surgery, University Hospital Zürich, Zürich, Switzerland
| | - René Vonlanthen
- Department of Surgery, University Hospital Zürich, Zürich, Switzerland
| | - Aiman Ismaeil
- Department of Surgery, University Hospital Zürich, Zürich, Switzerland
- Department of Surgery, Aswan University, Tingar, Egypt
| | - Stefanos Tzafos
- Department of Surgery, University Hospital Zürich, Zürich, Switzerland
| | - Hanna Hosa
- Department of Surgery, University Hospital Zürich, Zürich, Switzerland
| | - Diana Vetter
- Department of Surgery, University Hospital Zürich, Zürich, Switzerland
| | - Benjamin Misselwitz
- Division of Visceral Surgery and Medicine, Inselspital Bern and Bern University, Bern, Switzerland
| | - Marco Bueter
- Department of Surgery, University Hospital Zürich, Zürich, Switzerland
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