1
|
Pierre-Ferrer S, Collins B, Lukacsovich D, Wen S, Cai Y, Winterer J, Yan J, Pedersen L, Földy C, Brown SA. A phosphate transporter in VIPergic neurons of the suprachiasmatic nucleus gates locomotor activity during the light/dark transition in mice. Cell Rep 2024; 43:114220. [PMID: 38735047 DOI: 10.1016/j.celrep.2024.114220] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 02/23/2024] [Accepted: 04/25/2024] [Indexed: 05/14/2024] Open
Abstract
The suprachiasmatic nucleus (SCN) encodes time of day through changes in daily firing; however, the molecular mechanisms by which the SCN times behavior are not fully understood. To identify factors that could encode day/night differences in activity, we combine patch-clamp recordings and single-cell sequencing of individual SCN neurons in mice. We identify PiT2, a phosphate transporter, as being upregulated in a population of Vip+Nms+ SCN neurons at night. Although nocturnal and typically showing a peak of activity at lights off, mice lacking PiT2 (PiT2-/-) do not reach the activity level seen in wild-type mice during the light/dark transition. PiT2 loss leads to increased SCN neuronal firing and broad changes in SCN protein phosphorylation. PiT2-/- mice display a deficit in seasonal entrainment when moving from a simulated short summer to longer winter nights. This suggests that PiT2 is responsible for timing activity and is a driver of SCN plasticity allowing seasonal entrainment.
Collapse
Affiliation(s)
- Sara Pierre-Ferrer
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, Faculties of Medicine and Science, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland.
| | - Ben Collins
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, Faculties of Medicine and Science, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland; Department of Biology, Sacred Heart University, 5151 Park Ave., Fairfield, CT 06825, USA
| | - David Lukacsovich
- Laboratory of Neural Connectivity, Brain Research Institute, Faculties of Medicine and Science, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | - Shao'Ang Wen
- Institute of Neuroscience, State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai 200031, China
| | - Yuchen Cai
- Institute of Neuroscience, State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai 200031, China
| | - Jochen Winterer
- Laboratory of Neural Connectivity, Brain Research Institute, Faculties of Medicine and Science, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | - Jun Yan
- Institute of Neuroscience, State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai 200031, China
| | - Lene Pedersen
- Department of Molecular Biology and Genetics, Aarhus University, Universitetsbyen 81, 8000 Aarhus, Denmark
| | - Csaba Földy
- Laboratory of Neural Connectivity, Brain Research Institute, Faculties of Medicine and Science, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland.
| | - Steven A Brown
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, Faculties of Medicine and Science, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| |
Collapse
|
2
|
Meier SA, Furrer M, Nowak N, Zenobi R, Sundset MA, Huber R, Brown SA, Wagner G. Uncoupling of behavioral and metabolic 24-h rhythms in reindeer. Curr Biol 2024; 34:1596-1603.e4. [PMID: 38503287 DOI: 10.1016/j.cub.2024.02.072] [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: 09/08/2023] [Revised: 01/04/2024] [Accepted: 02/28/2024] [Indexed: 03/21/2024]
Abstract
Reindeer in the Arctic seasonally suppress daily circadian patterns of behavior present in most animals.1 In humans and mice, even when all daily behavioral and environmental influences are artificially suppressed, robust endogenous rhythms of metabolism governed by the circadian clock persist and are essential to health.2,3 Disrupted rhythms foster metabolic disorders and weight gain.4 To understand circadian metabolic organization in reindeer, we performed behavioral measurements and untargeted metabolomics from blood plasma samples taken from Eurasian tundra reindeer (Rangifer tarandus tarandus) across 24 h at 2-h intervals in four seasons. Our study confirmed the absence of circadian rhythms of behavior under constant darkness in the Arctic winter and constant daylight in the Arctic summer, as reported by others.1 We detected and measured the intensity of 893 metabolic features in all plasma samples using untargeted ultra-high-performance liquid chromatography-mass spectrometry (UPLC-MS). A core group of metabolites (66/893 metabolic features) consistently displayed 24-h rhythmicity. Most metabolites displayed a robust 24-h rhythm in winter and spring but were arrhythmic in summer and fall. Half of all measured metabolites displayed ultradian sleep-wake dependence in summer. Irrespective of the arrhythmic behavior, metabolism is rhythmic (24 h) in seasons of low food availability, potentially favoring energy efficiency. In seasons of food abundance, 24-h rhythmicity in metabolism is drastically reduced, again irrespective of behavioral rhythms, potentially fostering weight gain.
Collapse
Affiliation(s)
- Sara A Meier
- Institute of Pharmacology and Toxicology, University of Zurich, 8057 Zurich, Switzerland
| | - Melanie Furrer
- Child Development Center and Children's Research Center, University Children's Hospital Zurich, University of Zurich, 8032 Zurich, Switzerland
| | - Nora Nowak
- Department of Chemistry and Applied Biosciences, Swiss National Technical University (ETH), 8093 Zurich, Switzerland
| | - Renato Zenobi
- Department of Chemistry and Applied Biosciences, Swiss National Technical University (ETH), 8093 Zurich, Switzerland
| | - Monica A Sundset
- Department of Arctic and Marine Biology, UiT The Arctic University of Norway, 9019 Tromsø, Norway
| | - Reto Huber
- Child Development Center and Children's Research Center, University Children's Hospital Zurich, University of Zurich, 8032 Zurich, Switzerland; Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric Hospital Zurich, University of Zurich, 8032 Zurich, Switzerland.
| | - Steven A Brown
- Institute of Pharmacology and Toxicology, University of Zurich, 8057 Zurich, Switzerland
| | - Gabriela Wagner
- Department of Arctic and Marine Biology, UiT The Arctic University of Norway, 9019 Tromsø, Norway; Division of Forest and Forest Resources, Norwegian Institute of Bioeconomy Research, 9016 Tromsø, Norway.
| |
Collapse
|
3
|
Kwobah EK, Goodrich S, Kulzer JL, Kanyesigye M, Obatsa S, Cheruiyot J, Kiprono L, Kibet C, Ochieng F, Bukusi EA, Ofner S, Brown SA, Yiannoutsos CT, Atwoli L, Wools-Kaloustian K. Adaptation of the Client Diagnostic Questionnaire for East Africa. PLOS Glob Public Health 2024; 4:e0001756. [PMID: 38502647 PMCID: PMC10950255 DOI: 10.1371/journal.pgph.0001756] [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] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 02/17/2024] [Indexed: 03/21/2024]
Abstract
Research increasingly involves cross-cultural work with non-English-speaking populations, necessitating translation and cultural validation of research tools. This paper describes the process of translating and criterion validation of the Client Diagnostic Questionnaire (CDQ) for use in a multisite study in Kenya and Uganda. The English CDQ was translated into Swahili, Dholuo (Kenya) and Runyankole/Rukiga (Uganda) by expert translators. The translated documents underwent face validation by a bilingual committee, who resolved unclear statements, agreed on final translations and reviewed back translations to English. A diagnostic interview by a mental health specialist was used for criterion validation, and Kappa statistics assessed the strength of agreement between non-specialist scores and mental health professionals' diagnoses. Achieving semantic equivalence between translations was a challenge. Validation analysis was done with 30 participants at each site (median age 32.3 years (IQR = (26.5, 36.3)); 58 (64.4%) female). The sensitivity was 86.7%, specificity 64.4%, positive predictive value 70.9% and negative predictive value 82.9%. Diagnostic accuracy by the non-specialist was 75.6%. Agreement was substantial for major depressive episode and positive alcohol (past 6 months) and alcohol abuse (past 30 days). Agreement was moderate for other depressive disorders, panic disorder and psychosis screen; fair for generalized anxiety, drug abuse (past 6 months) and Post Traumatic Stress Disorder (PTSD); and poor for drug abuse (past 30 days). Variability of agreement between sites was seen for drug use (past 6 months) and PTSD. Our study successfully adapted the CDQ for use among people living with HIV in East Africa. We established that trained non-specialists can use the CDQ to screen for common mental health and substance use disorders with reasonable accuracy. Its use has the potential to increase case identification, improve linkage to mental healthcare, and improve outcomes. We recommend further studies to establish the psychometric properties of the translated tool.
Collapse
Affiliation(s)
- Edith Kamaru Kwobah
- Department of Mental Health, Moi Teaching and Referral Hospital, Eldoret, Kenya
| | - Suzanne Goodrich
- Division of Infectious Diseases, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Jayne Lewis Kulzer
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of California San Francisco, San Francisco, California, United States of America
| | | | - Sarah Obatsa
- Centre for Microbiology Research, Kenya Medical Research Institute, Kisumu, Kenya
| | | | - Lorna Kiprono
- Academic Model Providing Access to Care, Eldoret, Kenya
| | - Colma Kibet
- Academic Model Providing Access to Care, Eldoret, Kenya
| | - Felix Ochieng
- Centre for Microbiology Research, Kenya Medical Research Institute, Kisumu, Kenya
| | - Elizabeth A. Bukusi
- Centre for Microbiology Research, Kenya Medical Research Institute, Kisumu, Kenya
| | - Susan Ofner
- Department of Biostatistics and Health Data Science, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Steven A. Brown
- Department of Biostatistics and Health Data Science, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Constantin T. Yiannoutsos
- Department of Biostatistics and Health Data Science, Indiana University Fairbanks School of Public Health, Indianapolis, Indiana, United States of America
| | - Lukoye Atwoli
- Department of Mental Health and Behavioral Sciences, Moi University School of Medicine, Eldoret, Kenya
- Brain and Mind Institute and the Department of Internal Medicine, Medical College East Africa, Aga Khan University, Nairobi, Kenya
| | - Kara Wools-Kaloustian
- Division of Infectious Diseases, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| |
Collapse
|
4
|
Rodríguez GM, Pederson CA, Garcia D, Schwartz K, Brown SA, Aalsma MC. A classification system for youth outpatient behavioral health services billed to medicaid. Front Health Serv 2024; 4:1298592. [PMID: 38375532 PMCID: PMC10875037 DOI: 10.3389/frhs.2024.1298592] [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] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Accepted: 01/22/2024] [Indexed: 02/21/2024]
Abstract
Rates of youth behavioral health concerns have been steadily rising. Administrative data can be used to study behavioral health service utilization among youth, but current methods that rely on identifying an associated behavioral health diagnosis or provider specialty are limited. We reviewed all procedure codes billed to Medicaid for youth in one U.S. county over a 10-year period. We identified 158 outpatient behavioral health procedure codes and classified them according to service type. This classification system can be used by health services researchers to better characterize youth behavioral health service utilization.
Collapse
Affiliation(s)
- Gabriela M. Rodríguez
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Casey A. Pederson
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Dainelys Garcia
- Department of Pediatrics, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Katherine Schwartz
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Steven A. Brown
- Department of Biostatistics and Health Data Science, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Matthew C. Aalsma
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN, United States
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN, United States
| |
Collapse
|
5
|
Furrer M, Meier SA, Jan M, Franken P, Sundset MA, Brown SA, Wagner GC, Huber R. Reindeer in the Arctic reduce sleep need during rumination. Curr Biol 2024; 34:427-433.e5. [PMID: 38141616 DOI: 10.1016/j.cub.2023.12.012] [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: 09/02/2023] [Revised: 11/24/2023] [Accepted: 12/06/2023] [Indexed: 12/25/2023]
Abstract
Timing and quantity of sleep depend on a circadian (∼24-h) rhythm and a specific sleep requirement.1 Sleep curtailment results in a homeostatic rebound of more and deeper sleep, the latter reflected in increased electroencephalographic (EEG) slow-wave activity (SWA) during non-rapid eye movement (NREM) sleep.2 Circadian rhythms are synchronized by the light-dark cycle but persist under constant conditions.3,4,5 Strikingly, arctic reindeer behavior is arrhythmic during the solstices.6 Moreover, the Arctic's extreme seasonal environmental changes cause large variations in overall activity and food intake.7 We hypothesized that the maintenance of optimal functioning under these extremely fluctuating conditions would require adaptations not only in daily activity patterns but also in the homeostatic regulation of sleep. We studied sleep using non-invasive EEG in four Eurasian tundra reindeer (Rangifer tarandus tarandus) in Tromsø, Norway (69°N) during the fall equinox and both solstices. As expected, sleep-wake rhythms paralleled daily activity distribution, and sleep deprivation resulted in a homeostatic rebound in all seasons. Yet, these sleep rebounds were smaller in summer and fall than in winter. Surprisingly, SWA decreased not only during NREM sleep but also during rumination. Quantitative modeling revealed that sleep pressure decayed at similar rates during the two behavioral states. Finally, reindeer spent less time in NREM sleep the more they ruminated. These results suggest that they can sleep during rumination. The ability to reduce sleep need during rumination-undisturbed phases for both sleep recovery and digestion-might allow for near-constant feeding in the arctic summer.
Collapse
Affiliation(s)
- Melanie Furrer
- Child Development Center and Children's Research Center, University Children's Hospital Zurich, University of Zurich, Steinwiesstrasse 75, 8032 Zurich, Switzerland
| | - Sara A Meier
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Maxime Jan
- Center for Integrative Genomics, University of Lausanne, Génopode building, 1015 Lausanne, Switzerland; Bioinformatics Competence Center, University of Lausanne, Génopode building, 1015 Lausanne, Switzerland
| | - Paul Franken
- Center for Integrative Genomics, University of Lausanne, Génopode building, 1015 Lausanne, Switzerland
| | - Monica A Sundset
- Department of Arctic and Marine Biology, UiT The Arctic University of Norway, Framstredet 39, 9019 Tromsø, Norway
| | - Steven A Brown
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Gabriela C Wagner
- Department of Arctic and Marine Biology, UiT The Arctic University of Norway, Framstredet 39, 9019 Tromsø, Norway; Division of Forest and Forest Resources, Norwegian Institute of Bioeconomy Research, Holtvegen 66, 9016 Tromsø, Norway.
| | - Reto Huber
- Child Development Center and Children's Research Center, University Children's Hospital Zurich, University of Zurich, Steinwiesstrasse 75, 8032 Zurich, Switzerland; Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric Hospital Zurich, University of Zurich, Lenggstrasse 31, 8032 Zurich, Switzerland.
| |
Collapse
|
6
|
Sinturel F, Chera S, Brulhart-Meynet MC, Montoya JP, Stenvers DJ, Bisschop PH, Kalsbeek A, Guessous I, Jornayvaz FR, Philippe J, Brown SA, D'Angelo G, Riezman H, Dibner C. Circadian organization of lipid landscape is perturbed in type 2 diabetic patients. Cell Rep Med 2023; 4:101299. [PMID: 38016481 PMCID: PMC10772323 DOI: 10.1016/j.xcrm.2023.101299] [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: 12/20/2022] [Revised: 06/26/2023] [Accepted: 10/30/2023] [Indexed: 11/30/2023]
Abstract
Lipid homeostasis in humans follows a diurnal pattern in muscle and pancreatic islets, altered upon metabolic dysregulation. We employ tandem and liquid-chromatography mass spectrometry to investigate daily regulation of lipid metabolism in subcutaneous white adipose tissue (SAT) and serum of type 2 diabetic (T2D) and non-diabetic (ND) human volunteers (n = 12). Around 8% of ≈440 lipid metabolites exhibit diurnal rhythmicity in serum and SAT from ND and T2D subjects. The spectrum of rhythmic lipids differs between ND and T2D individuals, with the most substantial changes observed early morning, as confirmed by lipidomics in an independent cohort of ND and T2D subjects (n = 32) conducted at a single morning time point. Strikingly, metabolites identified as daily rhythmic in both serum and SAT from T2D subjects exhibit phase differences. Our study reveals massive temporal and tissue-specific alterations of human lipid homeostasis in T2D, providing essential clues for the development of lipid biomarkers in a temporal manner.
Collapse
Affiliation(s)
- Flore Sinturel
- Division of Thoracic and Endocrine Surgery, Department of Surgery, University Hospitals of Geneva, 1211 Geneva, Switzerland; Department of Cell Physiology and Metabolism, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland; Diabetes Center, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland; Institute of Genetics and Genomics in Geneva (iGE3), 1211 Geneva, Switzerland
| | - Simona Chera
- Division of Thoracic and Endocrine Surgery, Department of Surgery, University Hospitals of Geneva, 1211 Geneva, Switzerland; Department of Cell Physiology and Metabolism, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland; Diabetes Center, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland; Institute of Genetics and Genomics in Geneva (iGE3), 1211 Geneva, Switzerland; Department of Clinical Science, University of Bergen, 5021 Bergen, Norway
| | - Marie-Claude Brulhart-Meynet
- Division of Thoracic and Endocrine Surgery, Department of Surgery, University Hospitals of Geneva, 1211 Geneva, Switzerland; Diabetes Center, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland
| | - Jonathan Paz Montoya
- Institute of Bioengineering, School of Life Sciences, EPFL, 1015 Lausanne, Switzerland
| | - Dirk Jan Stenvers
- Department of Endocrinology and Metabolism, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, 1105 AZ, the Netherlands; Amsterdam Gastroenterology, Endocrinology and Metabolism (AGEM), Amsterdam University Medical Centers, Amsterdam, 1105 AZ, the Netherlands
| | - Peter H Bisschop
- Department of Endocrinology and Metabolism, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, 1105 AZ, the Netherlands; Amsterdam Gastroenterology, Endocrinology and Metabolism (AGEM), Amsterdam University Medical Centers, Amsterdam, 1105 AZ, the Netherlands
| | - Andries Kalsbeek
- Department of Endocrinology and Metabolism, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, 1105 AZ, the Netherlands; Amsterdam Gastroenterology, Endocrinology and Metabolism (AGEM), Amsterdam University Medical Centers, Amsterdam, 1105 AZ, the Netherlands; Laboratory for Endocrinology, Department of Clinical Chemistry, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam, 1105 AZ, the Netherlands; Netherlands Institute for Neuroscience (NIN), Royal Dutch Academy of Arts and Sciences (KNAW), Amsterdam, 1105 BA, the Netherlands
| | - Idris Guessous
- Department and Division of Primary Care Medicine, University Hospitals of Geneva, 1211 Geneva, Switzerland
| | - François R Jornayvaz
- Department of Cell Physiology and Metabolism, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland; Diabetes Center, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland; Division of Endocrinology, Diabetes, Nutrition, and Therapeutic Patient Education, Department of Medicine, University Hospitals of Geneva, 1211 Geneva, Switzerland
| | - Jacques Philippe
- Division of Endocrinology, Diabetes, Nutrition, and Therapeutic Patient Education, Department of Medicine, University Hospitals of Geneva, 1211 Geneva, Switzerland
| | - Steven A Brown
- Institute of Pharmacology and Toxicology, University of Zurich, 8057 Zurich, Switzerland
| | - Giovanni D'Angelo
- Institute of Bioengineering, School of Life Sciences, EPFL, 1015 Lausanne, Switzerland
| | - Howard Riezman
- Department of Biochemistry, Faculty of Science, NCCR Chemical Biology, University of Geneva, 1211 Geneva, Switzerland
| | - Charna Dibner
- Division of Thoracic and Endocrine Surgery, Department of Surgery, University Hospitals of Geneva, 1211 Geneva, Switzerland; Department of Cell Physiology and Metabolism, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland; Diabetes Center, Faculty of Medicine, University of Geneva, 1211 Geneva, Switzerland; Institute of Genetics and Genomics in Geneva (iGE3), 1211 Geneva, Switzerland.
| |
Collapse
|
7
|
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.
Collapse
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
| |
Collapse
|
8
|
Mallinson JB, Heywood ZE, Daniels RK, Arnold MD, Bones PJ, Brown SA. Reservoir computing using networks of memristors: effects of topology and heterogeneity. Nanoscale 2023. [PMID: 37211815 DOI: 10.1039/d2nr07275k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Reservoir computing (RC) has attracted significant interest as a framework for the implementation of novel neuromorphic computing architectures. Previously attention has been focussed on software-based reservoirs, where it has been demonstrated that reservoir topology plays a role in task performance, and functional advantage has been attributed to small-world and scale-free connectivity. However in hardware systems, such as electronic memristor networks, the mechanisms responsible for the reservoir dynamics are very different and the role of reservoir topology is largely unknown. Here we compare the performance of a range of memristive reservoirs in several RC tasks that are chosen to highlight different system requirements. We focus on percolating networks of nanoparticles (PNNs) which are novel self-assembled nanoscale systems that exhibit scale-free and small-world properties. We find that the performance of regular arrays of uniform memristive elements is limited by their symmetry but that this symmetry can be broken either by a heterogeneous distribution of memristor properties or a scale-free topology. The best perfomance across all tasks is observed for a scale-free network with uniform memistor properties. These results provide insight into the role of topology in neuromorphic reservoirs as well as an overview of the computational performance of scale-free networks of memristors in a range of benchmark tasks.
Collapse
Affiliation(s)
- J B Mallinson
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand.
| | - Z E Heywood
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand.
- Electrical and Computer Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand
| | - R K Daniels
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand.
| | - M D Arnold
- School of Mathematical and Physical Sciences, University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Australia
| | - P J Bones
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand.
- Electrical and Computer Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand
| | - S A Brown
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury, Christchurch, New Zealand.
| |
Collapse
|
9
|
Katsioudi G, Dreos R, Arpa ES, Gaspari S, Liechti A, Sato M, Gabriel CH, Kramer A, Brown SA, Gatfield D. A conditional Smg6 mutant mouse model reveals circadian clock regulation through the nonsense-mediated mRNA decay pathway. Sci Adv 2023; 9:eade2828. [PMID: 36638184 PMCID: PMC9839329 DOI: 10.1126/sciadv.ade2828] [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] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
Nonsense-mediated messenger RNA (mRNA) decay (NMD) has been intensively studied as a surveillance pathway that degrades erroneous transcripts arising from mutations or RNA processing errors. While additional roles in physiological control of mRNA stability have emerged, possible functions in mammalian physiology in vivo remain unclear. Here, we created a conditional mouse allele that allows converting the NMD effector nuclease SMG6 from wild-type to nuclease domain-mutant protein. We find that NMD down-regulation affects the function of the circadian clock, a system known to require rapid mRNA turnover. Specifically, we uncover strong lengthening of free-running circadian periods for liver and fibroblast clocks and direct NMD regulation of Cry2 mRNA, encoding a key transcriptional repressor within the rhythm-generating feedback loop. Transcriptome-wide changes in daily mRNA accumulation patterns in the entrained liver, as well as an altered response to food entrainment, expand the known scope of NMD regulation in mammalian gene expression and physiology.
Collapse
Affiliation(s)
- Georgia Katsioudi
- Center for Integrative Genomics, University of Lausanne, Lausanne, Switzerland
| | - René Dreos
- Center for Integrative Genomics, University of Lausanne, Lausanne, Switzerland
| | - Enes S. Arpa
- Center for Integrative Genomics, University of Lausanne, Lausanne, Switzerland
| | - Sevasti Gaspari
- Center for Integrative Genomics, University of Lausanne, Lausanne, Switzerland
| | - Angelica Liechti
- Center for Integrative Genomics, University of Lausanne, Lausanne, Switzerland
| | - Miho Sato
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zürich, Zürich, Switzerland
| | - Christian H. Gabriel
- Charité Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Laboratory of Chronobiology, Berlin, Germany
| | - Achim Kramer
- Charité Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Laboratory of Chronobiology, Berlin, Germany
| | - Steven A. Brown
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zürich, Zürich, Switzerland
| | - David Gatfield
- Center for Integrative Genomics, University of Lausanne, Lausanne, Switzerland
| |
Collapse
|
10
|
Schmidt F, Nowak N, Baumgartner P, Gaisl T, Malesevic S, Streckenbach B, Sievi NA, Schwarz EI, Zenobi R, Brown SA, Kohler M. Severe Obstructive Sleep Apnea Disrupts Vigilance-State-Dependent Metabolism. Int J Mol Sci 2022; 23:14052. [PMID: 36430527 PMCID: PMC9694615 DOI: 10.3390/ijms232214052] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/08/2022] [Accepted: 11/10/2022] [Indexed: 11/16/2022] Open
Abstract
The direct pathophysiological effects of obstructive sleep apnea (OSA) have been well described. However, the systemic and metabolic consequences of OSA are less well understood. The aim of this secondary analysis was to translate recent findings in healthy subjects on vigilance-state-dependent metabolism into the context of OSA patients and answer the question of how symptomatic OSA influences metabolism and whether these changes might explain metabolic and cardiovascular consequences of OSA. Patients with suspected OSA were assigned according to their oxygen desaturation index (ODI) and Epworth Sleepiness Scale (ESS) score into symptomatic OSA and controls. Vigilance-state-dependent breath metabolites assessed by high-resolution mass spectrometry were used to test for a difference in both groups. In total, 44 patients were eligible, of whom 18 (40.9%) were assigned to the symptomatic OSA group. Symptomatic OSA patients with a median [25%, 75% quartiles] ODI of 40.5 [35.0, 58.8] events/h and an ESS of 14.0 [11.2, 15.8] showed moderate to strong evidence for differences in 18 vigilance-state-dependent breath compounds compared to controls. These identified metabolites are part of major metabolic pathways in carbohydrate, amino acid, and lipid metabolism. Thus, beyond hypoxia per se, we hypothesize that disturbed sleep in OSA patients persists as disturbed sleep-dependent metabolite levels during daytime.
Collapse
Affiliation(s)
- Felix Schmidt
- Faculty of Medicine, University of Zurich, 8006 Zurich, Switzerland
- Department of Pulmonology, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Nora Nowak
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Patrick Baumgartner
- Faculty of Medicine, University of Zurich, 8006 Zurich, Switzerland
- Department of Pulmonology, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Thomas Gaisl
- Faculty of Medicine, University of Zurich, 8006 Zurich, Switzerland
- Department of Pulmonology, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Stefan Malesevic
- Faculty of Medicine, University of Zurich, 8006 Zurich, Switzerland
- Department of Pulmonology, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Bettina Streckenbach
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Noriane A. Sievi
- Department of Pulmonology, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Esther I. Schwarz
- Faculty of Medicine, University of Zurich, 8006 Zurich, Switzerland
- Department of Pulmonology, University Hospital Zurich, 8091 Zurich, Switzerland
| | - Renato Zenobi
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zurich, Switzerland
| | - Steven A. Brown
- Institute of Pharmacology and Toxicology, University of Zurich, 8006 Zurich, Switzerland
| | - Malcolm Kohler
- Faculty of Medicine, University of Zurich, 8006 Zurich, Switzerland
- Department of Pulmonology, University Hospital Zurich, 8091 Zurich, Switzerland
- Zurich Centre for Integrative Human Physiology, University of Zurich, 8006 Zurich, Switzerland
| |
Collapse
|
11
|
Daniels RK, Mallinson JB, Heywood ZE, Bones PJ, Arnold MD, Brown SA. Reservoir computing with 3D nanowire networks. Neural Netw 2022; 154:122-130. [PMID: 35882080 DOI: 10.1016/j.neunet.2022.07.001] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 04/27/2022] [Accepted: 07/06/2022] [Indexed: 10/17/2022]
Abstract
Networks of nanowires are currently being explored for a range of applications in brain-like (or neuromorphic) computing, and especially in reservoir computing (RC). Fabrication of real-world computing devices requires that the nanowires are deposited sequentially, leading to stacking of the wires on top of each other. However, most simulations of computational tasks using these systems treat the nanowires as 1D objects lying in a perfectly 2D plane - the effect of stacking on RC performance has not yet been established. Here we use detailed simulations to compare the performance of perfectly 2D and quasi-3D (stacked) networks of nanowires in two tasks: memory capacity and nonlinear transformation. We also show that our model of the junctions between nanowires is general enough to describe a wide range of memristive networks, and consider the impact of physically realistic electrode configurations on performance. We show that the various networks and configurations have a strikingly similar performance in RC tasks, which is surprising given their radically different topologies. Our results show that networks with an experimentally achievable number of electrodes perform close to the upper bounds achievable when using the information from every wire. However, we also show important differences, in particular that the quasi-3D networks are more resilient to changes in the input parameters, generalizing better to noisy training data. Since previous literature suggests that topology plays an important role in computing performance, these results may have important implications for future applications of nanowire networks in neuromorphic computing.
Collapse
Affiliation(s)
- R K Daniels
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, Te Kura Matū, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand
| | - J B Mallinson
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, Te Kura Matū, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand
| | - Z E Heywood
- Electrical and Computer Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand
| | - P J Bones
- Electrical and Computer Engineering, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand
| | - M D Arnold
- School of Mathematical and Physical Sciences, University of Technology Sydney, PO Box 123 Broadway NSW 2007, Australia
| | - S A Brown
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, Te Kura Matū, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand.
| |
Collapse
|
12
|
Delorme TC, Srikanta SB, Fisk AS, Cloutier MÈ, Sato M, Pothecary CA, Merz C, Foster RG, Brown SA, Peirson SN, Cermakian N, Banks GT. Chronic Exposure to Dim Light at Night or Irregular Lighting Conditions Impact Circadian Behavior, Motor Coordination, and Neuronal Morphology. Front Neurosci 2022; 16:855154. [PMID: 35495037 PMCID: PMC9043330 DOI: 10.3389/fnins.2022.855154] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 03/02/2022] [Indexed: 12/24/2022] Open
Abstract
Mistimed exposure to light has been demonstrated to negatively affect multiple aspects of physiology and behavior. Here we analyzed the effects of chronic exposure to abnormal lighting conditions in mice. We exposed mice for 1 year to either: a standard light/dark cycle, a “light-pollution” condition in which low levels of light were present in the dark phase of the circadian cycle (dim light at night, DLAN), or altered light cycles in which the length of the weekday and weekend light phase differed by 6 h (“social jetlag”). Mice exhibited several circadian activity phenotypes, as well as changes in motor function, associated particularly with the DLAN condition. Our data suggest that these phenotypes might be due to changes outside the core clock. Dendritic spine changes in other brain regions raise the possibility that these phenotypes are mediated by changes in neuronal coordination outside of the clock. Given the prevalence of artificial light exposure in the modern world, further work is required to establish whether these negative effects are observed in humans as well.
Collapse
Affiliation(s)
- Tara C. Delorme
- Department of Psychiatry, Douglas Mental Health University Institute, McGill University, Montréal, QC, Canada
| | - Shashank B. Srikanta
- Department of Psychiatry, Douglas Mental Health University Institute, McGill University, Montréal, QC, Canada
| | - Angus S. Fisk
- Nuffield Department of Clinical Neurosciences, Sleep and Circadian Neuroscience Institute, University of Oxford, Oxford, United Kingdom
| | - Marie-Ève Cloutier
- Department of Psychiatry, Douglas Mental Health University Institute, McGill University, Montréal, QC, Canada
| | - Miho Sato
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | - Carina A. Pothecary
- Nuffield Department of Clinical Neurosciences, Sleep and Circadian Neuroscience Institute, University of Oxford, Oxford, United Kingdom
| | - Chantal Merz
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | - Russell G. Foster
- Nuffield Department of Clinical Neurosciences, Sleep and Circadian Neuroscience Institute, University of Oxford, Oxford, United Kingdom
| | - Steven A. Brown
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | - Stuart N. Peirson
- Nuffield Department of Clinical Neurosciences, Sleep and Circadian Neuroscience Institute, University of Oxford, Oxford, United Kingdom
| | - Nicolas Cermakian
- Department of Psychiatry, Douglas Mental Health University Institute, McGill University, Montréal, QC, Canada
- *Correspondence: Nicolas Cermakian,
| | - Gareth T. Banks
- Mammalian Genetics Unit, MRC Harwell Institute, Oxfordshire, United Kingdom
- Gareth T. Banks,
| |
Collapse
|
13
|
Foss L, Brown SA, Sutherland S, Miller CJ, Philliber S. A randomized controlled trial of the impact of the Teen Council peer education program on youth development. Health Educ Res 2022; 37:36-47. [PMID: 35134906 DOI: 10.1093/her/cyac001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 01/07/2022] [Accepted: 01/24/2022] [Indexed: 06/14/2023]
Abstract
This paper presents results of an impact evaluation of Teen Council, a program that trains youth as peer educators. Teen Council is designed to help peer educators make healthy sexual and reproductive decisions, increase their confidence and abilities to educate their peers and inspire them to advocate for just sexual policies. The program's impact on these educators was evaluated using a randomized controlled trial. Over 5 years, interested high school students in seven states were randomly assigned to a study condition. An intent-to-treat framework using ordinary least square (OLS) regression was employed to measure program effects. Relative to control, Teen Council youth showed enhanced comfort with their own sexuality, greater comfort with and more frequent communication with parents about sexuality and more positive sexual health behaviors, including accessing reproductive health care and adopting more effective means of contraception. Teen Council youth also reported greater confidence in talking with peers about sexuality and more confidence in their civic engagement skills.
Collapse
Affiliation(s)
- L Foss
- Philliber Research & Evaluation, 16 Main Street, Accord, NY 12404, USA
| | - S A Brown
- Philliber Research & Evaluation, 16 Main Street, Accord, NY 12404, USA
| | - S Sutherland
- Planned Parenthood of the Great Northwest and the Hawaiian Islands, 2001 E. Madison, Seattle, WA 98122, USA
| | - C J Miller
- Planned Parenthood of the Great Northwest and the Hawaiian Islands, 2001 E. Madison, Seattle, WA 98122, USA
| | - S Philliber
- Philliber Research & Evaluation, 16 Main Street, Accord, NY 12404, USA
| |
Collapse
|
14
|
Cramer T, Gill R, Thirouin ZS, Vaas M, Sampath S, Martineau F, Noya SB, Panzanelli P, Sudharshan TJJ, Colameo D, Chang PKY, Wu PY, Shi R, Barker PA, Brown SA, Paolicelli RC, Klohs J, McKinney RA, Tyagarajan SK. Cross-talk between GABAergic postsynapse and microglia regulate synapse loss after brain ischemia. Sci Adv 2022; 8:eabj0112. [PMID: 35245123 PMCID: PMC8896802 DOI: 10.1126/sciadv.abj0112] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Microglia interact with neurons to facilitate synapse plasticity; however, signal(s) contributing to microglia activation for synapse elimination in pathology are not fully understood. Here, using in vitro organotypic hippocampal slice cultures and transient middle cerebral artery occlusion (MCAO) in genetically engineered mice in vivo, we report that at 24 hours after ischemia, microglia release brain-derived neurotrophic factor (BDNF) to downregulate glutamatergic and GABAergic synapses within the peri-infarct area. Analysis of the cornu ammonis 1 (CA1) in vitro shows that proBDNF and mBDNF downregulate glutamatergic dendritic spines and gephyrin scaffold stability through p75 neurotrophin receptor (p75NTR) and tropomyosin receptor kinase B (TrkB) receptors, respectively. After MCAO, we report that in the peri-infarct area and in the corresponding contralateral hemisphere, similar neuroplasticity occurs through microglia activation and gephyrin phosphorylation at serine-268 and serine-270 in vivo. Targeted deletion of the Bdnf gene in microglia or GphnS268A/S270A (phospho-null) point mutations protects against ischemic brain damage, neuroinflammation, and synapse downregulation after MCAO.
Collapse
Affiliation(s)
- Teresa Cramer
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, CH 8057 Zürich, Switzerland
| | - Raminder Gill
- Department of Pharmacology and Therapeutics, McGill University, 3649 Prom. Sir-William-Osler, Montreal, QC H3G 0B1, Canada
| | - Zahra S. Thirouin
- Research Institute of the McGill University Health Centre, 1650 Cedar Avenue, Montreal, QC H3G1A4, Canada
| | - Markus Vaas
- Clinical Trials Center, University Hospital Zurich, Rämistrasse 100/MOU2, CH 8044 Zürich, Switzerland
| | - Suchita Sampath
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, CH 8057 Zürich, Switzerland
| | - Fanny Martineau
- Department of Biomedical Sciences, University of Lausanne, Rue du Bugnon 7, CH 1005 Lausanne, Switzerland
| | - Sara B. Noya
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, CH 8057 Zürich, Switzerland
| | - Patrizia Panzanelli
- Department of Neuroscience Rita Levi Montalcini, University of Turin, Turin, Italy
| | - Tania J. J. Sudharshan
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, CH 8057 Zürich, Switzerland
| | - David Colameo
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, CH 8057 Zürich, Switzerland
| | - Philip K.-Y. Chang
- Department of Pharmacology and Therapeutics, McGill University, 3649 Prom. Sir-William-Osler, Montreal, QC H3G 0B1, Canada
| | - Pei You Wu
- Department of Pharmacology and Therapeutics, McGill University, 3649 Prom. Sir-William-Osler, Montreal, QC H3G 0B1, Canada
| | - Roy Shi
- Department of Pharmacology and Therapeutics, McGill University, 3649 Prom. Sir-William-Osler, Montreal, QC H3G 0B1, Canada
| | - Philip A. Barker
- Department of Biology, University of British Columbia, 3187 University Way, ASC 413, Kelowna, BC V1V 1V7, Canada
| | - Steven A. Brown
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, CH 8057 Zürich, Switzerland
| | - Rosa C. Paolicelli
- Department of Biomedical Sciences, University of Lausanne, Rue du Bugnon 7, CH 1005 Lausanne, Switzerland
| | - Jan Klohs
- Institute for Biomedical Engineering, University of Zurich and ETH Zurich, Wolfgang-Pauli-Strasse 27, CH 8093 Zürich, Switzerland
| | - Rebecca Anne McKinney
- Department of Pharmacology and Therapeutics, McGill University, 3649 Prom. Sir-William-Osler, Montreal, QC H3G 0B1, Canada
- Corresponding author. (S.K.T.); (R.A.M.)
| | - Shiva K. Tyagarajan
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, CH 8057 Zürich, Switzerland
- Department of Pharmacology and Therapeutics, McGill University, 3649 Prom. Sir-William-Osler, Montreal, QC H3G 0B1, Canada
- Corresponding author. (S.K.T.); (R.A.M.)
| |
Collapse
|
15
|
Infante MA, Eberson SC, Zhang Y, Brumback T, Brown SA, Colrain IM, Baker FC, Clark DB, De Bellis MD, Goldston D, Nagel BJ, Nooner KB, Zhao Q, Pohl KM, Sullivan EV, Pfefferbaum A, Tapert SF, Thompson WK. Adolescent Binge Drinking Is Associated With Accelerated Decline of Gray Matter Volume. Cereb Cortex 2021; 32:2611-2620. [PMID: 34729592 DOI: 10.1093/cercor/bhab368] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 08/27/2021] [Accepted: 08/28/2021] [Indexed: 11/12/2022] Open
Abstract
The age- and time-dependent effects of binge drinking on adolescent brain development have not been well characterized even though binge drinking is a health crisis among adolescents. The impact of binge drinking on gray matter volume (GMV) development was examined using 5 waves of longitudinal data from the National Consortium on Alcohol and NeuroDevelopment in Adolescence study. Binge drinkers (n = 166) were compared with non-binge drinkers (n = 82 after matching on potential confounders). Number of binge drinking episodes in the past year was linked to decreased GMVs in bilateral Desikan-Killiany cortical parcellations (26 of 34 with P < 0.05/34) with the strongest effects observed in frontal regions. Interactions of binge drinking episodes and baseline age demonstrated stronger effects in younger participants. Statistical models sensitive to number of binge episodes and their temporal proximity to brain volumes provided the best fits. Consistent with prior research, results of this study highlight the negative effects of binge drinking on the developing brain. Our results present novel findings that cortical GMV decreases were greater in closer proximity to binge drinking episodes in a dose-response manner. This relation suggests a causal effect and raises the possibility that normal growth trajectories may be reinstated with alcohol abstinence.
Collapse
Affiliation(s)
- M A Infante
- Department of Psychiatry, University of California, San Diego, La Jolla, CA, USA
| | - S C Eberson
- Department of Psychiatry, University of California, San Diego, La Jolla, CA, USA
| | - Y Zhang
- Division of Biostatistics, Herbert Wertheim School of Public Health and Human Longevity Science, University of California, San Diego, USA.,Population Neuroscience and Genetics Lab, University of California, San Diego, USA
| | - T Brumback
- Department of Psychological Science, Northern Kentucky University, Kentucky, USA
| | - S A Brown
- Department of Psychiatry, University of California, San Diego, La Jolla, CA, USA.,Department of Psychology, University of California, San Diego, La Jolla, CA, USA
| | - I M Colrain
- Center for Health Sciences, SRI International, Menlo Park, CA, USA
| | - F C Baker
- Center for Health Sciences, SRI International, Menlo Park, CA, USA
| | - D B Clark
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA, USA
| | - M D De Bellis
- Department of Psychiatry & Behavioral Sciences, Duke University, Durham, NC, USA
| | - D Goldston
- Department of Psychiatry & Behavioral Sciences, Duke University, Durham, NC, USA
| | - B J Nagel
- Departments of Psychiatry and Behavioral Neuroscience, Oregon Health & Sciences University, Portland, OR, USA
| | - K B Nooner
- Department of Psychology, University of North Carolina Wilmington, Wilmington, NC, USA
| | - Q Zhao
- Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, USA
| | - K M Pohl
- Center for Health Sciences, SRI International, Menlo Park, CA, USA.,Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, USA
| | - E V Sullivan
- Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, USA
| | - A Pfefferbaum
- Center for Health Sciences, SRI International, Menlo Park, CA, USA.,Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, USA
| | - S F Tapert
- Department of Psychiatry, University of California, San Diego, La Jolla, CA, USA
| | - W K Thompson
- Division of Biostatistics, Herbert Wertheim School of Public Health and Human Longevity Science, University of California, San Diego, USA.,Population Neuroscience and Genetics Lab, University of California, San Diego, USA.,Department of Radiology, University of California, San Diego, USA
| |
Collapse
|
16
|
Nowak N, Gaisl T, Miladinovic D, Marcinkevics R, Osswald M, Bauer S, Buhmann J, Zenobi R, Sinues P, Brown SA, Kohler M. Rapid and reversible control of human metabolism by individual sleep states. Cell Rep 2021; 37:109903. [PMID: 34706242 DOI: 10.1016/j.celrep.2021.109903] [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] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 09/14/2021] [Accepted: 10/06/2021] [Indexed: 11/18/2022] Open
Abstract
Sleep is crucial to restore body functions and metabolism across nearly all tissues and cells, and sleep restriction is linked to various metabolic dysfunctions in humans. Using exhaled breath analysis by secondary electrospray ionization high-resolution mass spectrometry, we measured the human exhaled metabolome at 10-s resolution across a night of sleep in combination with conventional polysomnography. Our subsequent analysis of almost 2,000 metabolite features demonstrates rapid, reversible control of major metabolic pathways by the individual vigilance states. Within this framework, whereas a switch to wake reduces fatty acid oxidation, a switch to slow-wave sleep increases it, and the transition to rapid eye movement sleep results in elevation of tricarboxylic acid (TCA) cycle intermediates. Thus, in addition to daily regulation of metabolism, there exists a surprising and complex underlying orchestration across sleep and wake. Both likely play an important role in optimizing metabolic circuits for human performance and health.
Collapse
Affiliation(s)
- Nora Nowak
- Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich 8093, Switzerland; Department of Pulmonology, University Hospital Zurich, Zurich 8091, Switzerland; Institute of Pharmacology and Toxicology, University of Zurich, Zurich 8057, Switzerland
| | - Thomas Gaisl
- Department of Pulmonology, University Hospital Zurich, Zurich 8091, Switzerland
| | | | | | - Martin Osswald
- Department of Pulmonology, University Hospital Zurich, Zurich 8091, Switzerland
| | - Stefan Bauer
- Department of Computer Science, ETH Zurich, Zurich 8092, Switzerland
| | - Joachim Buhmann
- Department of Computer Science, ETH Zurich, Zurich 8092, Switzerland
| | - Renato Zenobi
- Department of Chemistry and Applied Biosciences, ETH Zurich, Zurich 8093, Switzerland
| | - Pablo Sinues
- University Children's Hospital Basel, Basel 4056, Switzerland; Department of Biomedical Engineering, University of Basel, Allschwil 4123, Switzerland
| | - Steven A Brown
- Institute of Pharmacology and Toxicology, University of Zurich, Zurich 8057, Switzerland.
| | - Malcolm Kohler
- Department of Pulmonology, University Hospital Zurich, Zurich 8091, Switzerland.
| |
Collapse
|
17
|
Lisdahl KM, Tapert S, Sher KJ, Gonzalez R, Nixon SJ, Ewing SWF, Conway KP, Wallace A, Sullivan R, Hatcher K, Kaiver C, Thompson W, Reuter C, Bartsch H, Wade NE, Jacobus J, Albaugh MD, Allgaier N, Anokhin AP, Bagot K, Baker FC, Banich MT, Barch DM, Baskin-Sommers A, Breslin FJ, Brown SA, Calhoun V, Casey BJ, Chaarani B, Chang L, Clark DB, Cloak C, Constable RT, Cottler LB, Dagher RK, Dapretto M, Dick A, Do EK, Dosenbach NUF, Dowling GJ, Fair DA, Florsheim P, Foxe JJ, Freedman EG, Friedman NP, Garavan HP, Gee DG, Glantz MD, Glaser P, Gonzalez MR, Gray KM, Grant S, Haist F, Hawes S, Heeringa SG, Hermosillo R, Herting MM, Hettema JM, Hewitt JK, Heyser C, Hoffman EA, Howlett KD, Huber RS, Huestis MA, Hyde LW, Iacono WG, Isaiah A, Ivanova MY, James RS, Jernigan TL, Karcher NR, Kuperman JM, Laird AR, Larson CL, LeBlanc KH, Lopez MF, Luciana M, Luna B, Maes HH, Marshall AT, Mason MJ, McGlade E, Morris AS, Mulford C, Nagel BJ, Neigh G, Palmer CE, Paulus MP, Pecheva D, Prouty D, Potter A, Puttler LI, Rajapakse N, Ross JM, Sanchez M, Schirda C, Schulenberg J, Sheth C, Shilling PD, Sowell ER, Speer N, Squeglia L, Sripada C, Steinberg J, Sutherland MT, Tomko R, Uban K, Vrieze S, Weiss SRB, Wing D, Yurgelun-Todd DA, Zucker RA, Heitzeg MM. Substance use patterns in 9-10 year olds: Baseline findings from the adolescent brain cognitive development (ABCD) study. Drug Alcohol Depend 2021; 227:108946. [PMID: 34392051 PMCID: PMC8833837 DOI: 10.1016/j.drugalcdep.2021.108946] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 06/03/2021] [Accepted: 06/05/2021] [Indexed: 01/28/2023]
Abstract
BACKGROUND The Adolescent Brain Cognitive Development ™ Study (ABCD Study®) is an open-science, multi-site, prospective, longitudinal study following over 11,800 9- and 10-year-old youth into early adulthood. The ABCD Study aims to prospectively examine the impact of substance use (SU) on neurocognitive and health outcomes. Although SU initiation typically occurs during teen years, relatively little is known about patterns of SU in children younger than 12. METHODS This study aims to report the detailed ABCD Study® SU patterns at baseline (n = 11,875) in order to inform the greater scientific community about cohort's early SU. Along with a detailed description of SU, we ran mixed effects regression models to examine the association between early caffeine and alcohol sipping with demographic factors, externalizing symptoms and parental history of alcohol and substance use disorders (AUD/SUD). PRIMARY RESULTS At baseline, the majority of youth had used caffeine (67.6 %) and 22.5 % reported sipping alcohol (22.5 %). There was little to no reported use of other drug categories (0.2 % full alcohol drink, 0.7 % used nicotine, <0.1 % used any other drug of abuse). Analyses revealed that total caffeine use and early alcohol sipping were associated with demographic variables (p's<.05), externalizing symptoms (caffeine p = 0002; sipping p = .0003), and parental history of AUD (sipping p = .03). CONCLUSIONS ABCD Study participants aged 9-10 years old reported caffeine use and alcohol sipping experimentation, but very rare other SU. Variables linked with early childhood alcohol sipping and caffeine use should be examined as contributing factors in future longitudinal analyses examining escalating trajectories of SU in the ABCD Study cohort.
Collapse
Affiliation(s)
- Krista M Lisdahl
- University of Wisconsin, Milwaukee, WI, United States; Medical College of Wisconsin, Milwaukee, WI, United States.
| | - Susan Tapert
- University of California, San Diego, CA, United States
| | | | - Raul Gonzalez
- Florida International University, Miami, FL, United States
| | - Sara Jo Nixon
- University of Florida, Gainesville, FL, United States
| | | | - Kevin P Conway
- National Institute on Drug Abuse, NIH, Bethesda, MD, United States
| | - Alex Wallace
- University of Wisconsin, Milwaukee, WI, United States
| | - Ryan Sullivan
- University of Wisconsin, Milwaukee, WI, United States
| | - Kelah Hatcher
- University of Wisconsin, Milwaukee, WI, United States
| | | | - Wes Thompson
- University of California, San Diego, CA, United States
| | - Chase Reuter
- University of California, San Diego, CA, United States
| | - Hauke Bartsch
- University of California, San Diego, CA, United States
| | | | | | - M D Albaugh
- University of Vermont, Burlington, VT, United States
| | - N Allgaier
- University of Vermont, Burlington, VT, United States
| | - A P Anokhin
- Washington University, St. Louis, MO, United States
| | - K Bagot
- University of California, San Diego, CA, United States; Icahn School of Medicine at Mount Sinai, United States
| | - F C Baker
- SRI International, Menlo Park, CA, United States
| | - M T Banich
- University of Colorado Boulder, CO, United States
| | - D M Barch
- Washington University, St. Louis, MO, United States
| | | | - F J Breslin
- Laureate Institute for Brain Research, Tulsa, OK, United States
| | - S A Brown
- University of California, San Diego, CA, United States
| | - V Calhoun
- Georgia State University, Atlanta, GA, United States
| | - B J Casey
- Yale University, New Haven, CT, United States
| | - B Chaarani
- University of Vermont, Burlington, VT, United States
| | - L Chang
- University of Maryland School of Medicine, Baltimore, MD, United States
| | - D B Clark
- University of Pittsburgh, Pittsburgh, PA, United States
| | - C Cloak
- University of Maryland School of Medicine, Baltimore, MD, United States
| | | | - L B Cottler
- University of Florida, Gainesville, FL, United States
| | - R K Dagher
- National Institute of Minority Health and Health Disparities, Bethesda, MD, United States
| | - M Dapretto
- University of California, Los Angeles, CA, United States
| | - A Dick
- Florida International University, Miami, FL, United States
| | - E K Do
- Virginia Commonwealth University, Richmond, VA, United States
| | | | - G J Dowling
- National Institute on Drug Abuse, NIH, Bethesda, MD, United States
| | - D A Fair
- University of Minnesota, Minneapolis, MN, United States
| | - P Florsheim
- University of Wisconsin, Milwaukee, WI, United States
| | - J J Foxe
- University of Rochester, Rochester, NY, United States
| | - E G Freedman
- University of Rochester, Rochester, NY, United States
| | - N P Friedman
- University of Colorado Boulder, CO, United States
| | - H P Garavan
- University of Vermont, Burlington, VT, United States
| | - D G Gee
- Yale University, New Haven, CT, United States
| | - M D Glantz
- National Institute on Drug Abuse, NIH, Bethesda, MD, United States
| | - P Glaser
- Washington University, St. Louis, MO, United States
| | - M R Gonzalez
- Children’s Hospital Los Angeles, Los Angeles, CA, United States
| | - K M Gray
- Medical University of South Carolina, Charleston, SC, United States
| | - S Grant
- National Institute on Drug Abuse, NIH, Bethesda, MD, United States
| | - F Haist
- University of California, San Diego, CA, United States
| | - S Hawes
- Florida International University, Miami, FL, United States
| | - S G Heeringa
- University of Michigan, Ann Arbor, MI, United States
| | - R Hermosillo
- Oregon Health & Science University, Portland, OR, United States
| | - M M Herting
- University of Southern California, Los Angeles, CA, United States
| | - J M Hettema
- Virginia Commonwealth University, Richmond, VA, United States
| | - J K Hewitt
- University of Colorado Boulder, CO, United States
| | - C Heyser
- University of California, San Diego, CA, United States
| | - E A Hoffman
- National Institute on Drug Abuse, NIH, Bethesda, MD, United States
| | - K D Howlett
- National Institute on Drug Abuse, NIH, Bethesda, MD, United States
| | - R S Huber
- University of Utah, Salt Lake City, UT, United States
| | - M A Huestis
- University of California, San Diego, CA, United States; Thomas Jefferson University, Philadelphia, PA, United States
| | - L W Hyde
- University of Michigan, Ann Arbor, MI, United States
| | - W G Iacono
- University of Minnesota, Minneapolis, MN, United States
| | - A Isaiah
- University of Maryland School of Medicine, Baltimore, MD, United States
| | - M Y Ivanova
- University of Vermont, Burlington, VT, United States
| | - R S James
- American Psychistric Association, United States
| | - T L Jernigan
- University of California, San Diego, CA, United States
| | - N R Karcher
- Washington University, St. Louis, MO, United States
| | - J M Kuperman
- University of California, San Diego, CA, United States
| | - A R Laird
- Florida International University, Miami, FL, United States
| | - C L Larson
- University of Wisconsin, Milwaukee, WI, United States
| | - K H LeBlanc
- National Institute on Drug Abuse, NIH, Bethesda, MD, United States
| | - M F Lopez
- National Institute on Drug Abuse, NIH, Bethesda, MD, United States
| | - M Luciana
- University of Minnesota, Minneapolis, MN, United States
| | - B Luna
- University of Pittsburgh, Pittsburgh, PA, United States
| | - H H Maes
- Virginia Commonwealth University, Richmond, VA, United States
| | - A T Marshall
- Children’s Hospital Los Angeles, Los Angeles, CA, United States
| | - M J Mason
- University of Tennessee, Knoxville, TN, United States
| | - E McGlade
- University of Utah, Salt Lake City, UT, United States
| | - A S Morris
- Laureate Institute for Brain Research, Tulsa, OK, United States; Oklahoma State University, Stillwater, OK, United States
| | - C Mulford
- National Institute on Drug Abuse, NIH, Bethesda, MD, United States
| | - B J Nagel
- Oregon Health & Science University, Portland, OR, United States
| | - G Neigh
- Virginia Commonwealth University, Richmond, VA, United States
| | - C E Palmer
- University of California, San Diego, CA, United States
| | - M P Paulus
- Laureate Institute for Brain Research, Tulsa, OK, United States
| | - D Pecheva
- University of California, San Diego, CA, United States
| | - D Prouty
- SRI International, Menlo Park, CA, United States
| | - A Potter
- University of Vermont, Burlington, VT, United States
| | - L I Puttler
- University of Michigan, Ann Arbor, MI, United States
| | - N Rajapakse
- National Institute of Minority Health and Health Disparities, Bethesda, MD, United States
| | - J M Ross
- University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - M Sanchez
- Florida International University, Miami, FL, United States
| | - C Schirda
- University of Pittsburgh, Pittsburgh, PA, United States
| | - J Schulenberg
- University of Michigan, Ann Arbor, MI, United States
| | - C Sheth
- University of Utah, Salt Lake City, UT, United States
| | - P D Shilling
- University of California, San Diego, CA, United States
| | - E R Sowell
- Children’s Hospital Los Angeles, Los Angeles, CA, United States
| | - N Speer
- University of Colorado Boulder, CO, United States
| | - L Squeglia
- Medical University of South Carolina, Charleston, SC, United States
| | - C Sripada
- University of Michigan, Ann Arbor, MI, United States
| | - J Steinberg
- Virginia Commonwealth University, Richmond, VA, United States
| | - M T Sutherland
- Florida International University, Miami, FL, United States
| | - R Tomko
- Medical University of South Carolina, Charleston, SC, United States
| | - K Uban
- University of California, Irvine, CA, United States
| | - S Vrieze
- University of Minnesota, Minneapolis, MN, United States
| | - S R B Weiss
- National Institute on Drug Abuse, NIH, Bethesda, MD, United States
| | - D Wing
- University of California, San Diego, CA, United States
| | | | - R A Zucker
- University of Michigan, Ann Arbor, MI, United States
| | | | | |
Collapse
|
18
|
Hannich JT, Loizides‐Mangold U, Sinturel F, Harayama T, Vandereycken B, Saini C, Gosselin P, Brulhart‐Meynet M, Robert M, Chanon S, Durand C, Paz Montoya J, David FPA, Guessous I, Pataky Z, Golay A, Jornayvaz FR, Philippe J, Dermitzakis ET, Brown SA, Lefai E, Riezman H, Dibner C. Ether lipids, sphingolipids and toxic 1-deoxyceramides as hallmarks for lean and obese type 2 diabetic patients. Acta Physiol (Oxf) 2021; 232:e13610. [PMID: 33351229 DOI: 10.1111/apha.13610] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [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: 10/02/2020] [Revised: 12/08/2020] [Accepted: 12/21/2020] [Indexed: 12/12/2022]
Abstract
AIM The worldwide increase in obesity and type 2 diabetes (T2D) represents a major health challenge. Chronically altered lipids induced by obesity further promote the development of T2D, and the accumulation of toxic lipid metabolites in serum and peripheral organs may contribute to the diabetic phenotype. METHODS To better understand the complex metabolic pattern of lean and obese T2D and non-T2D individuals, we analysed the lipid profile of human serum, skeletal muscle and visceral adipose tissue of two cohorts by systematic mass spectrometry-based lipid analysis. RESULTS Lipid homeostasis was strongly altered in a disease- and tissue-specific manner, allowing us to define T2D signatures associated with obesity from those that were obesity independent. Lipid changes encompassed lyso-, diacyl- and ether-phospholipids. Moreover, strong changes in sphingolipids included cytotoxic 1-deoxyceramide accumulation in a disease-specific manner in serum and visceral adipose tissue. The high amounts of non-canonical 1-deoxyceramide present in human adipose tissue most likely come from cell-autonomous synthesis because 1-deoxyceramide production increased upon differentiation to adipocytes in mouse cell culture experiments. CONCLUSION Taken together, the observed lipidome changes in obesity and T2D will facilitate the identification of T2D patient subgroups and represent an important step towards personalized medicine in diabetes.
Collapse
Affiliation(s)
- J. Thomas Hannich
- Department of Biochemistry Faculty of Science NCCR Chemical Biology University of Geneva Geneva Switzerland
| | - Ursula Loizides‐Mangold
- Division of Endocrinology Diabetes, Nutrition and Patient Education Department of Medicine 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) University of Geneva Geneva Switzerland
| | - Flore Sinturel
- Division of Endocrinology Diabetes, Nutrition and Patient Education Department of Medicine 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) University of Geneva Geneva Switzerland
| | - Takeshi Harayama
- Department of Biochemistry Faculty of Science NCCR Chemical Biology University of Geneva Geneva Switzerland
| | | | - Camille Saini
- Department and Division of Primary Care Medicine University Hospital of Geneva Geneva Switzerland
| | - Pauline Gosselin
- Division of Endocrinology Diabetes, Nutrition and Patient Education Department of Medicine 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) University of Geneva Geneva Switzerland
- Department and Division of Primary Care Medicine University Hospital of Geneva Geneva Switzerland
| | - Marie‐Claude Brulhart‐Meynet
- Division of Endocrinology Diabetes, Nutrition and Patient Education Department of Medicine University Hospital of Geneva Geneva Switzerland
| | - Maud Robert
- Department of Digestive and Bariatric Surgery Edouard Herriot University HospitalUniversity Lyon France
| | - Stephanie Chanon
- CarMeN Laboratory INSERM U1060 INRA 1397 University Lyon 1 Oullins France
| | - Christine Durand
- CarMeN Laboratory INSERM U1060 INRA 1397 University Lyon 1 Oullins France
| | - Jonathan Paz Montoya
- Proteomics Core Facility Ecole Polytechnique Fédérale de Lausanne Lausanne Switzerland
| | - Fabrice P. A. David
- Gene Expression Core Facility Ecole Polytechnique Fédérale de Lausanne Lausanne Switzerland
| | - Idris Guessous
- Department and Division of Primary Care Medicine University Hospital of Geneva Geneva Switzerland
| | - Zoltan Pataky
- Division of Endocrinology Diabetes, Nutrition and Patient Education Department of Medicine WHO Collaborating Centre University Hospital of GenevaUniversity of Geneva Geneva Switzerland
| | - Alain Golay
- Division of Endocrinology Diabetes, Nutrition and Patient Education Department of Medicine WHO Collaborating Centre University Hospital of GenevaUniversity of Geneva Geneva Switzerland
| | - François R. Jornayvaz
- Division of Endocrinology Diabetes, Nutrition and Patient Education Department of Medicine University Hospital of Geneva Geneva Switzerland
- Diabetes Center Faculty of Medicine University of Geneva Geneva Switzerland
| | - Jacques Philippe
- Division of Endocrinology Diabetes, Nutrition and Patient Education Department of Medicine University Hospital of Geneva Geneva Switzerland
- Diabetes Center Faculty of Medicine University of Geneva Geneva Switzerland
| | - Emmanouil T. Dermitzakis
- Diabetes Center Faculty of Medicine University of Geneva Geneva Switzerland
- Institute of Genetics and Genomics in Geneva (iGE3) University of Geneva Geneva Switzerland
- Department of Genetic Medicine and Development Faculty of Medicine University of Geneva Geneva Switzerland
| | - Steven A. Brown
- Institute of Pharmacology and Toxicology University of Zurich Zurich Switzerland
| | - Etienne Lefai
- INRA Unité de Nutrition Humaine Université Clermont Auvergne Paris France
| | - Howard Riezman
- Department of Biochemistry Faculty of Science NCCR Chemical Biology University of Geneva Geneva Switzerland
| | - Charna Dibner
- Division of Endocrinology Diabetes, Nutrition and Patient Education Department of Medicine 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) University of Geneva Geneva Switzerland
| |
Collapse
|
19
|
Rapin G, Caballero N, Gaponenko I, Ziegler B, Rawleigh A, Moriggi E, Giamarchi T, Brown SA, Paruch P. Roughness and dynamics of proliferating cell fronts as a probe of cell-cell interactions. Sci Rep 2021; 11:8869. [PMID: 33893343 PMCID: PMC8065107 DOI: 10.1038/s41598-021-86684-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 03/05/2021] [Indexed: 12/22/2022] Open
Abstract
Juxtacellular interactions play an essential but still not fully understood role in both normal tissue development and tumour invasion. Using proliferating cell fronts as a model system, we explore the effects of cell-cell interactions on the geometry and dynamics of these one-dimensional biological interfaces. We observe two distinct scaling regimes of the steady state roughness of in-vitro propagating Rat1 fibroblast cell fronts, suggesting different hierarchies of interactions at sub-cell lengthscales and at a lengthscale of 2-10 cells. Pharmacological modulation significantly affects the proliferation speed of the cell fronts, and those modulators that promote cell mobility or division also lead to the most rapid evolution of cell front roughness. By comparing our experimental observations to numerical simulations of elastic cell fronts with purely short-range interactions, we demonstrate that the interactions at few-cell lengthscales play a key role. Our methodology provides a simple framework to measure and characterise the biological effects of such interactions, and could be useful in tumour phenotyping.
Collapse
Affiliation(s)
- Guillaume Rapin
- Department of Quantum Matter Physics, University of Geneva, 1211, Geneva, Switzerland
| | - Nirvana Caballero
- Department of Quantum Matter Physics, University of Geneva, 1211, Geneva, Switzerland
| | - Iaroslav Gaponenko
- Department of Quantum Matter Physics, University of Geneva, 1211, Geneva, Switzerland
- G.W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Benedikt Ziegler
- Department of Quantum Matter Physics, University of Geneva, 1211, Geneva, Switzerland
| | - Audrey Rawleigh
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | - Ermanno Moriggi
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | - Thierry Giamarchi
- Department of Quantum Matter Physics, University of Geneva, 1211, Geneva, Switzerland
| | - Steven A Brown
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | - Patrycja Paruch
- Department of Quantum Matter Physics, University of Geneva, 1211, Geneva, Switzerland.
| |
Collapse
|
20
|
Jagannath A, Varga N, Dallmann R, Rando G, Gosselin P, Ebrahimjee F, Taylor L, Mosneagu D, Stefaniak J, Walsh S, Palumaa T, Di Pretoro S, Sanghani H, Wakaf Z, Churchill GC, Galione A, Peirson SN, Boison D, Brown SA, Foster RG, Vasudevan SR. Adenosine integrates light and sleep signalling for the regulation of circadian timing in mice. Nat Commun 2021; 12:2113. [PMID: 33837202 PMCID: PMC8035342 DOI: 10.1038/s41467-021-22179-z] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [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: 08/31/2019] [Accepted: 02/18/2021] [Indexed: 01/01/2023] Open
Abstract
The accumulation of adenosine is strongly correlated with the need for sleep and the detection of sleep pressure is antagonised by caffeine. Caffeine also affects the circadian timing system directly and independently of sleep physiology, but how caffeine mediates these effects upon the circadian clock is unclear. Here we identify an adenosine-based regulatory mechanism that allows sleep and circadian processes to interact for the optimisation of sleep/wake timing in mice. Adenosine encodes sleep history and this signal modulates circadian entrainment by light. Pharmacological and genetic approaches demonstrate that adenosine acts upon the circadian clockwork via adenosine A1/A2A receptor signalling through the activation of the Ca2+ -ERK-AP-1 and CREB/CRTC1-CRE pathways to regulate the clock genes Per1 and Per2. We show that these signalling pathways converge upon and inhibit the same pathways activated by light. Thus, circadian entrainment by light is systematically modulated on a daily basis by sleep history. These findings contribute to our understanding of how adenosine integrates signalling from both light and sleep to regulate circadian timing in mice.
Collapse
Affiliation(s)
- Aarti Jagannath
- Sleep and Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, OMPI-G, Oxford, UK.
| | - Norbert Varga
- Sleep and Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, OMPI-G, Oxford, UK
| | - Robert Dallmann
- Biomedical Sciences, Warwick Medical School, University of Warwick, Coventry, UK
| | - Gianpaolo Rando
- Department of Molecular Biology, University of Geneva, Geneva 4, Switzerland
| | - Pauline Gosselin
- Department of Molecular Biology, University of Geneva, Geneva 4, Switzerland
| | - Farid Ebrahimjee
- Sleep and Circadian Neuroscience Institute (SCNi), Department of Pharmacology, University of Oxford, Oxford, UK
| | - Lewis Taylor
- Sleep and Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, OMPI-G, Oxford, UK
| | - Dragos Mosneagu
- Sleep and Circadian Neuroscience Institute (SCNi), Department of Pharmacology, University of Oxford, Oxford, UK
| | - Jakub Stefaniak
- Sleep and Circadian Neuroscience Institute (SCNi), Department of Pharmacology, University of Oxford, Oxford, UK
| | - Steven Walsh
- Sleep and Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, OMPI-G, Oxford, UK
| | - Teele Palumaa
- Sleep and Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, OMPI-G, Oxford, UK
| | - Simona Di Pretoro
- Sleep and Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, OMPI-G, Oxford, UK
| | - Harshmeena Sanghani
- Sleep and Circadian Neuroscience Institute (SCNi), Department of Pharmacology, University of Oxford, Oxford, UK
| | - Zeinab Wakaf
- Sleep and Circadian Neuroscience Institute (SCNi), Department of Pharmacology, University of Oxford, Oxford, UK
| | - Grant C Churchill
- Sleep and Circadian Neuroscience Institute (SCNi), Department of Pharmacology, University of Oxford, Oxford, UK
| | - Antony Galione
- Sleep and Circadian Neuroscience Institute (SCNi), Department of Pharmacology, University of Oxford, Oxford, UK
| | - Stuart N Peirson
- Sleep and Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, OMPI-G, Oxford, UK
| | - Detlev Boison
- Department of Neurosurgery, Robert Wood Johnson Medical School, Rutgers University, Piscataway, NJ, USA
| | - Steven A Brown
- Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | - Russell G Foster
- Sleep and Circadian Neuroscience Institute (SCNi), Nuffield Department of Clinical Neurosciences, University of Oxford, OMPI-G, Oxford, UK.
| | - Sridhar R Vasudevan
- Sleep and Circadian Neuroscience Institute (SCNi), Department of Pharmacology, University of Oxford, Oxford, UK.
| |
Collapse
|
21
|
Patsis I, Goodrich S, Yiannoutsos CT, Brown SA, Musick BS, Diero L, Kulzer JL, Bwana MB, Oyaro P, Wools-Kaloustian KK. Lower rates of ART initiation and decreased retention among ART-naïve patients who consume alcohol enrolling in HIV care and treatment programs in Kenya and Uganda. PLoS One 2020; 15:e0240654. [PMID: 33095784 PMCID: PMC7584184 DOI: 10.1371/journal.pone.0240654] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 09/04/2019] [Accepted: 10/01/2020] [Indexed: 12/21/2022] Open
Abstract
Objectives Almost 13 million people are estimated to be on antiretroviral therapy in Eastern and Southern Africa, and their disease course and program effectiveness could be significantly affected by the concurrent use of alcohol. Screening for alcohol use may be important to assess the prevalence of alcohol consumption and its impact on patient and programmatic outcomes. Methods As part of this observational study, data on patient characteristics and alcohol consumption were collected on a cohort of 765 adult patients enrolling in HIV care in East Africa. Alcohol consumption was assessed with the AUDIT questionnaire at enrollment. Subjects were classified as consuming any alcohol (AUDIT score >0), hazardous drinkers (AUDIT score ≥8) and hyper drinkers (AUDIT score ≥16). The effects of alcohol consumption on retention in care, death and delays in antiretroviral therapy (ART) initiation were assessed through competing risk (Fine & Gray) models. Results Of all study participants, 41.6% consumed alcohol, 26.7% were classified as hazardous drinkers, and 16.0% as hyper drinkers. Depending on alcohol consumption classification, men were 3–4 times more likely to consume alcohol compared to women. Hazardous drinkers (median age 32.8 years) and hyper drinkers (32.7 years) were slightly older compared to non-hazardous drinkers (30.7 years) and non-hyper drinkers (30.8 years), (p-values = 0.014 and 0.053 respectively). Median CD4 at enrollment was 330 cells/μl and 16% were classified World Health Organization (WHO) stage 3 or 4. There was no association between alcohol consumption and CD4 count or WHO stage at enrollment. Alcohol consumption was associated with significantly lower probability of ART initiation (adjusted sub-distribution hazard ratio aSHR = 0.77 between alcohol consumers versus non-consumers; p-value = 0.008), and higher patient non-retention in care (aSHR = 1.77, p-value = 0.023). Discussion Alcohol consumption is associated with significant delays in ART initiation and reduced retention in care for patients enrolling in HIV care and treatment programs in East Africa. Consequently, interventions that target alcohol consumption may have a significant impact on the HIV care cascade.
Collapse
Affiliation(s)
- Ioannis Patsis
- Department of Hygiene and Epidemiology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Suzanne Goodrich
- Division of Infectious Diseases, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Constantin T. Yiannoutsos
- Department of Biostatistics, Indiana University Fairbanks School of Public Health, Indianapolis, Indiana, United States of America
- * E-mail:
| | - Steven A. Brown
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Beverly S. Musick
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| | - Lameck Diero
- School of Medicine, College of Health Sciences, Moi University, Eldoret, Kenya
| | - Jayne L. Kulzer
- Department of Medicine, University of California San Francisco, San Francisco, California, United States of America
| | - Mwembesa Bosco Bwana
- Department of Medicine, Mbarara University of Science and Technology, Mbarara, Uganda
| | - Patrick Oyaro
- Centre for Microbiology Research, Kenya Medical Research (KEMRI), Nairobi, Kenya
| | - Kara K. Wools-Kaloustian
- Division of Infectious Diseases, Department of Medicine, Indiana University School of Medicine, Indianapolis, Indiana, United States of America
| |
Collapse
|
22
|
Witzig M, Grimm A, Schmitt K, Lejri I, Frank S, Brown SA, Eckert A. Clock-Controlled Mitochondrial Dynamics Correlates with Cyclic Pregnenolone Synthesis. Cells 2020; 9:cells9102323. [PMID: 33086741 PMCID: PMC7589815 DOI: 10.3390/cells9102323] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 10/01/2020] [Revised: 10/15/2020] [Accepted: 10/16/2020] [Indexed: 12/12/2022] Open
Abstract
Neurosteroids are steroids synthetized in the nervous system, with the first step of steroidogenesis taking place within mitochondria with the synthesis of pregnenolone. They exert important brain-specific functions by playing a role in neurotransmission, learning and memory processes, and neuroprotection. Here, we show for the first time that mitochondrial neurosteroidogenesis follows a circadian rhythm and correlates with the rhythmic changes in mitochondrial morphology. We used synchronized human A172 glioma cells, which are steroidogenic cells with a functional core molecular clock, to show that pregnenolone levels and translocator protein (TSPO) are controlled by the clock, probably via circadian regulation of mitochondrial fusion/fission. Key findings were recapitulated in mouse brains. We also showed that genetic or pharmacological abrogation of fusion/fission activity, as well as disturbing the core molecular clock, abolished circadian rhythms of pregnenolone and TSPO. Our findings provide new insights into the crosstalk between mitochondrial function (here, neurosteroidogenesis) and circadian cycles.
Collapse
Affiliation(s)
- Melissa Witzig
- Neurobiology Lab for Brain Aging and Mental Health, Molecular & Cognitive Neuroscience, Transfaculty Research Platform, University of Basel, 4002 Basel, Switzerland; (M.W.); (A.G.); (K.S.); (I.L.)
- Psychiatric University Clinics Basel, Medical Faculty, University of Basel, 4002 Basel, Switzerland
| | - Amandine Grimm
- Neurobiology Lab for Brain Aging and Mental Health, Molecular & Cognitive Neuroscience, Transfaculty Research Platform, University of Basel, 4002 Basel, Switzerland; (M.W.); (A.G.); (K.S.); (I.L.)
- Psychiatric University Clinics Basel, Medical Faculty, University of Basel, 4002 Basel, Switzerland
- Division of Molecular Psychology, Live Sciences Training Facility, University of Basel, 4055 Basel, Switzerland
| | - Karen Schmitt
- Neurobiology Lab for Brain Aging and Mental Health, Molecular & Cognitive Neuroscience, Transfaculty Research Platform, University of Basel, 4002 Basel, Switzerland; (M.W.); (A.G.); (K.S.); (I.L.)
- Psychiatric University Clinics Basel, Medical Faculty, University of Basel, 4002 Basel, Switzerland
| | - Imane Lejri
- Neurobiology Lab for Brain Aging and Mental Health, Molecular & Cognitive Neuroscience, Transfaculty Research Platform, University of Basel, 4002 Basel, Switzerland; (M.W.); (A.G.); (K.S.); (I.L.)
- Psychiatric University Clinics Basel, Medical Faculty, University of Basel, 4002 Basel, Switzerland
| | - Stephan Frank
- Division of Neuropathology, Institute of Pathology, University Hospital Basel, 4031 Basel, Switzerland;
| | - Steven A. Brown
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zürich, 8057 Zürich, Switzerland;
| | - Anne Eckert
- Neurobiology Lab for Brain Aging and Mental Health, Molecular & Cognitive Neuroscience, Transfaculty Research Platform, University of Basel, 4002 Basel, Switzerland; (M.W.); (A.G.); (K.S.); (I.L.)
- Psychiatric University Clinics Basel, Medical Faculty, University of Basel, 4002 Basel, Switzerland
- Correspondence: ; Tel.: +41-61-325-5487; Fax: +41-06-1325-5577
| |
Collapse
|
23
|
Brown SA, Burke TM. 0215 Sleep Duration Associated with Degraded Performance in Marksmanship and Weapon Stability During a 72-Hour Mission Training Exercise. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction
Military operations require vigilance and performance under stressful conditions while functioning with little to no sleep. Previous links between marksmanship performance and sleep restrictions have been shown primarily in novice Soldier populations, with significant decrements in reaction time and decision making skills rather than lethality, mobility, or weapon handling metrics. Additionally, previous research has focused on isolated static marksmanship tasks in laboratory settings. The research presented here assessed the relationship between changes in Soldier sleep duration as measured by actigraphy, and marksmanship performance when conducting a 72-hour military field training exercise.
Methods
Forty-six volunteers [42 males (age 24.5±4.2y; mean±SD)] across three platoons participated in this assessment of Soldier performance during a company-wide mission exercise. Sleep characteristics were collected via actigraphy throughout the mission. Marksmanship performance was assessed during pre-, mid-, and post-mission, utilizing an operationally relevant course that integrated a static self-paced shooting task with a dynamic, fast-paced multiple target task. Marksmanship was assessed in areas of lethality (e.g. accuracy, shot dispersion), mobility (e.g. acquisition, engagement times), and weapon handling stability (e.g. movement of barrel during aiming).
Results
Analysis utilized a multivariate analysis of covariance (MANCOVA) with platoon as the independent variable and total sleep time over the previous 24-hours as the covariant, during the mid-session assessment. The results indicated that prior sleep does significantly modulate marksmanship performance in areas of lethality and stability (ps<.05), but not mobility. Although all individuals received fewer hours of sleep than typical during the mission, those who received less sleep had greater inaccuracy and dispersion in their shot groups, and more barrel movement during weapon handling.
Conclusion
Marksmanship is a key military skill required of all Soldiers. This study has linked degradations in marksmanship lethality and stability performance in the field to naturally occurring sleep restrictions due to platoon-group variances during mission activities. Additionally, it is the first study to link weapon handling stability degradations to sleep loss. Further analysis will explore performance degradations associated with aspects of sleep quality, as well as individual platoon differences, such as leadership, qualifications, and resiliency.
Support
CCDC Soldier Center and Military Operational Medicine Research Program.
Collapse
Affiliation(s)
- S A Brown
- Combat Capabilities Development Command Soldier Center, Natick, MA
| | - T M Burke
- Behavioral Biology Branch, Center for Military Psychiatry and Neuroscience, Walter Reed Army Institute of Research (WRAIR), Silver Spring, MD
| |
Collapse
|
24
|
Le Ster M, Chan JR, Ruck BJ, Brown SA, Natali F. Removable capping layer for air-sensitive GdN. Nanotechnology 2020; 31:275709. [PMID: 32208377 DOI: 10.1088/1361-6528/ab82d3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The strongly correlated rare earth nitrides display unusual coupled magnetic, electronic and superconducting properties, with predicted topological states. However, their air-sensitiveness has prevented in-depth investigations of their properties. In this paper, we show that a 100 nm thick epitaxial samarium layer provides adequate passivation of 100 nm thick thin films of gadolinium nitride (GdN), the prototypical rare earth nitride, enabling ex-situ magnetic and structural characterizations. Using reflection high-energy electron diffraction, atomic force microscopy and energy dispersive x-ray spectroscopy, we investigate the thermal desorption of the samarium layer under vacuum. We finally demonstrate successful removal of the samarium capping layer in a separate vacuum chamber after exposure to air using a combination of argon ion sputtering and thermal desorption at 400 °C, recovering the GdN surface.
Collapse
Affiliation(s)
- M Le Ster
- The MacDiarmid Institute for Advanced Materials and Nanotechnology School of Physical and Chemical Sciences University of Canterbury Private Bag 4800 Christchurch 8140 New Zealand
| | | | | | | | | |
Collapse
|
25
|
Brüning F, Noya SB, Bange T, Koutsouli S, Rudolph JD, Tyagarajan SK, Cox J, Mann M, Brown SA, Robles MS. Sleep-wake cycles drive daily dynamics of synaptic phosphorylation. Science 2020; 366:366/6462/eaav3617. [PMID: 31601740 DOI: 10.1126/science.aav3617] [Citation(s) in RCA: 131] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Accepted: 09/04/2019] [Indexed: 12/14/2022]
Abstract
The circadian clock drives daily changes of physiology, including sleep-wake cycles, through regulation of transcription, protein abundance, and function. Circadian phosphorylation controls cellular processes in peripheral organs, but little is known about its role in brain function and synaptic activity. We applied advanced quantitative phosphoproteomics to mouse forebrain synaptoneurosomes isolated across 24 hours, accurately quantifying almost 8000 phosphopeptides. Half of the synaptic phosphoproteins, including numerous kinases, had large-amplitude rhythms peaking at rest-activity and activity-rest transitions. Bioinformatic analyses revealed global temporal control of synaptic function through phosphorylation, including synaptic transmission, cytoskeleton reorganization, and excitatory/inhibitory balance. Sleep deprivation abolished 98% of all phosphorylation cycles in synaptoneurosomes, indicating that sleep-wake cycles rather than circadian signals are main drivers of synaptic phosphorylation, responding to both sleep and wake pressures.
Collapse
Affiliation(s)
- Franziska Brüning
- Institute of Medical Psychology, Faculty of Medicine, LMU Munich, Germany.,Department of Proteomics and Signal Transduction, Max-Planck Institute of Biochemistry, 82152 Martinsried, Germany
| | - Sara B Noya
- Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | - Tanja Bange
- Institute of Medical Psychology, Faculty of Medicine, LMU Munich, Germany
| | - Stella Koutsouli
- Institute of Medical Psychology, Faculty of Medicine, LMU Munich, Germany
| | - Jan D Rudolph
- Computational Systems Biochemistry, Max-Planck Institute of Biochemistry, Martinsried, Germany
| | - Shiva K Tyagarajan
- Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | - Jürgen Cox
- Computational Systems Biochemistry, Max-Planck Institute of Biochemistry, Martinsried, Germany
| | - Matthias Mann
- Department of Proteomics and Signal Transduction, Max-Planck Institute of Biochemistry, 82152 Martinsried, Germany.,Novo Nordisk Foundation Center for Protein Research, Faculty of Health Science, University of Copenhagen, Copenhagen, Denmark
| | - Steven A Brown
- Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland.
| | - Maria S Robles
- Institute of Medical Psychology, Faculty of Medicine, LMU Munich, Germany.
| |
Collapse
|
26
|
Münch M, Wirz-Justice A, Brown SA, Kantermann T, Martiny K, Stefani O, Vetter C, Wright KP, Wulff K, Skene DJ. The Role of Daylight for Humans: Gaps in Current Knowledge. Clocks Sleep 2020; 2:61-85. [PMID: 33089192 PMCID: PMC7445840 DOI: 10.3390/clockssleep2010008] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 02/21/2020] [Indexed: 01/04/2023] Open
Abstract
Daylight stems solely from direct, scattered and reflected sunlight, and undergoes dynamic changes in irradiance and spectral power composition due to latitude, time of day, time of year and the nature of the physical environment (reflections, buildings and vegetation). Humans and their ancestors evolved under these natural day/night cycles over millions of years. Electric light, a relatively recent invention, interacts and competes with the natural light-dark cycle to impact human biology. What are the consequences of living in industrialised urban areas with much less daylight and more use of electric light, throughout the day (and at night), on general health and quality of life? In this workshop report, we have classified key gaps of knowledge in daylight research into three main groups: (I) uncertainty as to daylight quantity and quality needed for "optimal" physiological and psychological functioning, (II) lack of consensus on practical measurement and assessment methods and tools for monitoring real (day) light exposure across multiple time scales, and (III) insufficient integration and exchange of daylight knowledge bases from different disciplines. Crucial short and long-term objectives to fill these gaps are proposed.
Collapse
Affiliation(s)
- Mirjam Münch
- Sleep/Wake Research Centre, Massey University Wellington, Wellington 6021, New Zealand
| | - Anna Wirz-Justice
- Centre for Chronobiology, Psychiatric Hospital of the University of Basel, 4002 Basel, Switzerland; (A.W.-J.); (O.S.)
- Transfaculty Research Platform Molecular and Cognitive Neurosciences (MCN), University of Basel, 4002 Basel, Switzerland
| | - Steven A. Brown
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zürich, 8057 Zürich, Switzerland;
| | - Thomas Kantermann
- Faculty for Health and Social Affairs, University of Applied Sciences for Economics and Management (FOM), 45141 Essen, Germany;
- SynOpus, 44789 Bochum, Germany
| | - Klaus Martiny
- Psychiatric Center Copenhagen, University of Copenhagen, Rigshospitalet, 2100 Copenhagen, Denmark;
| | - Oliver Stefani
- Centre for Chronobiology, Psychiatric Hospital of the University of Basel, 4002 Basel, Switzerland; (A.W.-J.); (O.S.)
- Transfaculty Research Platform Molecular and Cognitive Neurosciences (MCN), University of Basel, 4002 Basel, Switzerland
| | - Céline Vetter
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA; (C.V.); (K.P.W.J.)
| | - Kenneth P. Wright
- Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO 80309, USA; (C.V.); (K.P.W.J.)
- Division of Endocrinology, Metabolism and Diabetes, University of Colorado, Aurora, CO 80045, USA
| | - Katharina Wulff
- Departments of Radiation Sciences and Molecular Biology, Umeå University, 901 87 Umeå, Sweden;
- Wallenberg Centre for Molecular Medicine (WCMM), Umeå University, 901 87 Umeå, Sweden
| | - Debra J. Skene
- Chronobiology, Faculty of Health and Medical Sciences, University of Surrey, Guildford GU2 7XH, UK;
| |
Collapse
|
27
|
Affiliation(s)
- Steven A. Brown
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zürich, Switzerland
| | - Miho Sato
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zürich, Switzerland
| |
Collapse
|
28
|
Noya SB, Colameo D, Brüning F, Spinnler A, Mircsof D, Opitz L, Mann M, Tyagarajan SK, Robles MS, Brown SA. The forebrain synaptic transcriptome is organized by clocks but its proteome is driven by sleep. Science 2019; 366:366/6462/eaav2642. [DOI: 10.1126/science.aav2642] [Citation(s) in RCA: 103] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Accepted: 09/03/2019] [Indexed: 12/13/2022]
Abstract
Neurons have adapted mechanisms to traffic RNA and protein into distant dendritic and axonal arbors. Taking a biochemical approach, we reveal that forebrain synaptic transcript accumulation shows overwhelmingly daily rhythms, with two-thirds of synaptic transcripts showing time-of-day–dependent abundance independent of oscillations in the soma. These transcripts formed two sharp temporal and functional clusters, with transcripts preceding dawn related to metabolism and translation and those anticipating dusk related to synaptic transmission. Characterization of the synaptic proteome around the clock demonstrates the functional relevance of temporal gating for synaptic processes and energy homeostasis. Unexpectedly, sleep deprivation completely abolished proteome but not transcript oscillations. Altogether, the emerging picture is one of a circadian anticipation of messenger RNA needs in the synapse followed by translation as demanded by sleep-wake cycles.
Collapse
Affiliation(s)
- Sara B. Noya
- Institute of Pharmacology and Toxicology, University of Zürich, Zurich, Switzerland
| | - David Colameo
- Institute of Pharmacology and Toxicology, University of Zürich, Zurich, Switzerland
| | - Franziska Brüning
- Institute of Medical Psychology, Medical Faculty, LMU Munich, Germany
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Andrea Spinnler
- Institute of Pharmacology and Toxicology, University of Zürich, Zurich, Switzerland
| | - Dennis Mircsof
- Institute of Pharmacology and Toxicology, University of Zürich, Zurich, Switzerland
| | - Lennart Opitz
- Functional Genomics Center Zurich, University of Zurich–Eidgenosissche Technische Hochschule, Zurich, Switzerland
| | - Matthias Mann
- Department of Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, Martinsried, Germany
- Clinical Proteomics Group, Proteomics Program, Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, Copenhagen, Denmark
| | - Shiva K. Tyagarajan
- Institute of Pharmacology and Toxicology, University of Zürich, Zurich, Switzerland
| | - Maria S. Robles
- Institute of Medical Psychology, Medical Faculty, LMU Munich, Germany
| | - Steven A. Brown
- Institute of Pharmacology and Toxicology, University of Zürich, Zurich, Switzerland
| |
Collapse
|
29
|
Muheim CM, Spinnler A, Sartorius T, Dürr R, Huber R, Kabagema C, Ruth P, Brown SA. Dynamic- and Frequency-Specific Regulation of Sleep Oscillations by Cortical Potassium Channels. Curr Biol 2019; 29:2983-2992.e3. [PMID: 31474531 DOI: 10.1016/j.cub.2019.07.056] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 03/23/2019] [Revised: 06/15/2019] [Accepted: 07/17/2019] [Indexed: 10/26/2022]
Abstract
Primary electroencephalographic (EEG) features of sleep arise in part from thalamocortical neural assemblies, and cortical potassium channels have long been thought to play a critical role. We have exploited the regionally dynamic nature of sleep EEG to develop a novel screening strategy and used it to conduct an adeno-associated virus (AAV)-mediated RNAi screen for cellular roles of 31 different voltage-gated potassium channels in modulating cortical EEG features across the circadian sleep-wake cycle. Surprisingly, a majority of channels modified only electroencephalographic frequency bands characteristic of sleep, sometimes diurnally or even in specific vigilance states. Confirming our screen for one channel, we show that depletion of the KCa1.1 (or "BK") channel reduces EEG power in slow-wave sleep by slowing neuronal repolarization. Strikingly, this reduction completely abolishes transcriptomic changes between sleep and wake. Thus, our data establish an unexpected connection between transcription and EEG power controlled by specific potassium channels. We postulate that additive dynamic roles of individual potassium channels could integrate different influences upon sleep and wake within single neurons.
Collapse
Affiliation(s)
- Christine M Muheim
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zürich, Winterthurerstrasse 190, Zürich 8057, Switzerland
| | - Andrea Spinnler
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zürich, Winterthurerstrasse 190, Zürich 8057, Switzerland
| | - Tina Sartorius
- Institute of Pharmacy, Department of Pharmacology, Toxicology and Clinical Pharmacy, University of Tübingen, Auf der Morgenstelle 8, Tübingen 72076, Germany
| | - Roland Dürr
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zürich, Winterthurerstrasse 190, Zürich 8057, Switzerland
| | - Reto Huber
- University Children's Hospital Zurich, University of Zürich, Steinwiesstrasse 75, Zürich 8032, Switzerland
| | - Clement Kabagema
- Institute of Pharmacy, Department of Pharmacology, Toxicology and Clinical Pharmacy, University of Tübingen, Auf der Morgenstelle 8, Tübingen 72076, Germany
| | - Peter Ruth
- Institute of Pharmacy, Department of Pharmacology, Toxicology and Clinical Pharmacy, University of Tübingen, Auf der Morgenstelle 8, Tübingen 72076, Germany
| | - Steven A Brown
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zürich, Winterthurerstrasse 190, Zürich 8057, Switzerland.
| |
Collapse
|
30
|
Wen Q, Mustafi SM, Li J, Risacher SL, Tallman E, Brown SA, West JD, Harezlak J, Farlow MR, Unverzagt FW, Gao S, Apostolova LG, Saykin AJ, Wu YC. White matter alterations in early-stage Alzheimer's disease: A tract-specific study. Alzheimers Dement (Amst) 2019; 11:576-587. [PMID: 31467968 PMCID: PMC6713788 DOI: 10.1016/j.dadm.2019.06.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Introduction Diffusion magnetic resonance imaging may allow for microscopic characterization of white matter degeneration in early stages of Alzheimer's disease. Methods Multishell Diffusion magnetic resonance imaging data were acquired from 100 participants (40 cognitively normal, 38 with subjective cognitive decline, and 22 with mild cognitive impairment [MCI]). White matter microscopic degeneration in 27 major tracts of interest was assessed using diffusion tensor imaging (DTI), neurite orientation dispersion and density imaging, and q-space imaging. Results Lower DTI fractional anisotropy and higher radial diffusivity were observed in the cingulum, thalamic radiation, and forceps major of participants with MCI. These tracts of interest also had the highest predictive power to discriminate groups. Diffusion metrics were associated with cognitive performance, particularly Rey Auditory Verbal Learning Test immediate recall, with the highest association observed in participants with MCI. Discussion While DTI was the most sensitive, neurite orientation dispersion and density imaging and q-space imaging complementarily characterized reduced axonal density accompanied with dispersed and less restricted white matter microstructures. Mild cognitive decline poses microstructural alterations in white matter tracts. The alterations include higher axonal dispersion and lower tissue restriction. Diffusion metrics are associated with cognitive outcomes in AD continuum.
Collapse
Affiliation(s)
- Qiuting Wen
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Sourajit M Mustafi
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Junjie Li
- University Information Technology Service - Research Technology, Indiana University, Indianapolis, IN, USA
| | - Shannon L Risacher
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Eileen Tallman
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Steven A Brown
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - John D West
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Jaroslaw Harezlak
- Department of Epidemiology and Biostatistics, School of Public Health, Indiana University, Bloomington, IN, USA
| | - Martin R Farlow
- Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Neurology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Frederick W Unverzagt
- Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Sujuan Gao
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Liana G Apostolova
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Neurology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Andrew J Saykin
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Neurology, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Yu-Chien Wu
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA
| |
Collapse
|
31
|
Cederroth CR, Albrecht U, Bass J, Brown SA, Dyhrfjeld-Johnsen J, Gachon F, Green CB, Hastings MH, Helfrich-Förster C, Hogenesch JB, Lévi F, Loudon A, Lundkvist GB, Meijer JH, Rosbash M, Takahashi JS, Young M, Canlon B. Medicine in the Fourth Dimension. Cell Metab 2019; 30:238-250. [PMID: 31390550 PMCID: PMC6881776 DOI: 10.1016/j.cmet.2019.06.019] [Citation(s) in RCA: 217] [Impact Index Per Article: 43.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 06/08/2019] [Accepted: 06/27/2019] [Indexed: 12/21/2022]
Abstract
The importance of circadian biology has rarely been considered in pre-clinical studies, and even more when translating to the bedside. Circadian biology is becoming a critical factor for improving drug efficacy and diminishing drug toxicity. Indeed, there is emerging evidence showing that some drugs are more effective at nighttime than daytime, whereas for others it is the opposite. This suggests that the biology of the target cell will determine how an organ will respond to a drug at a specific time of the day, thus modulating pharmacodynamics. Thus, it is now time that circadian factors become an integral part of translational research.
Collapse
Affiliation(s)
- Christopher R Cederroth
- Experimental Audiology, Department of Physiology and Pharmacology, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Urs Albrecht
- Department of Biology, Unit of Biochemistry, University of Fribourg, Fribourg, Switzerland
| | - Joseph Bass
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Steven A Brown
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | | | - Frederic Gachon
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia
| | - Carla B Green
- Department of Neuroscience, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390, USA
| | - Michael H Hastings
- Medical Research Council (MRC) Laboratory of Molecular Biology, Cambridge, UK
| | - Charlotte Helfrich-Förster
- Neurobiology and Genetics, Biocenter, Theodor-Boveri Institute, University of Würzburg, Würzburg, Germany
| | - John B Hogenesch
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Francis Lévi
- Cancer Chronotherapy Team, School of Medicine, University of Warwick, Coventry, UK; Warwick University on "Personalized Cancer Chronotherapeutics through System Medicine" (C2SysMed), European Associated Laboratory of the Unité Mixte de Recherche Scientifique 935, Institut National de la Santé et de la Recherche Médicale and Paris-Sud University, Villejuif, France; Department of Medical Oncology, Paul Brousse Hospital, Assistance Publique-Hopitaux de Paris, 94800 Villejuif, France
| | - Andrew Loudon
- School of Medicine, Faculty of Biology, Medicine and Health, University of Manchester, UK
| | | | - Johanna H Meijer
- Department of Neurophysiology, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, the Netherlands
| | - Michael Rosbash
- Department of Biology, Howard Hughes Medical Institute and National Center for Behavioral Genomics, Brandeis University, Waltham, MA 02453, USA
| | - Joseph S Takahashi
- Howard Hughes Medical Institute, Department of Neuroscience, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Michael Young
- Laboratory of Genetics, The Rockefeller University, New York, NY 10065, USA
| | - Barbara Canlon
- Experimental Audiology, Department of Physiology and Pharmacology, Karolinska Institutet, 171 77 Stockholm, Sweden.
| |
Collapse
|
32
|
Sinturel F, Makhlouf AM, Meyer P, Tran C, Pataky Z, Golay A, Rey G, Howald C, Dermitzakis ET, Pichard C, Philippe J, Brown SA, Dibner C. Cellular circadian period length inversely correlates with HbA 1c levels in individuals with type 2 diabetes. Diabetologia 2019; 62:1453-1462. [PMID: 31134308 DOI: 10.1007/s00125-019-4907-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 04/17/2019] [Indexed: 10/26/2022]
Abstract
AIMS/HYPOTHESIS The circadian system plays an essential role in regulating the timing of human metabolism. Indeed, circadian misalignment is strongly associated with high rates of metabolic disorders. The properties of the circadian oscillator can be measured in cells cultured in vitro and these cellular rhythms are highly informative of the physiological circadian rhythm in vivo. We aimed to discover whether molecular properties of the circadian oscillator are altered as a result of type 2 diabetes. METHODS We assessed molecular clock properties in dermal fibroblasts established from skin biopsies taken from nine obese and eight non-obese individuals with type 2 diabetes and 11 non-diabetic control individuals. Following in vitro synchronisation, primary fibroblast cultures were subjected to continuous assessment of circadian bioluminescence profiles based on lentiviral luciferase reporters. RESULTS We observed a significant inverse correlation (ρ = -0.592; p < 0.05) between HbA1c values and circadian period length within cells from the type 2 diabetes group. RNA sequencing analysis conducted on samples from this group revealed that ICAM1, encoding the endothelial adhesion protein, was differentially expressed in fibroblasts from individuals with poorly controlled vs well-controlled type 2 diabetes and its levels correlated with cellular period length. Consistent with this circadian link, the ICAM1 gene also displayed rhythmic binding of the circadian locomotor output cycles kaput (CLOCK) protein that correlated with gene expression. CONCLUSIONS/INTERPRETATION We provide for the first time a potential molecular link between glycaemic control in individuals with type 2 diabetes and circadian clock machinery. This paves the way for further mechanistic understanding of circadian oscillator changes upon type 2 diabetes development in humans. DATA AVAILABILITY RNA sequencing data and clinical phenotypic data have been deposited at the European Genome-phenome Archive (EGA), which is hosted by the European Bioinformatics Institute (EBI) and the Centre for Genomic Regulation (CRG), ega-box-1210, under accession no. EGAS00001003622.
Collapse
Affiliation(s)
- Flore Sinturel
- Department of Medicine, Division of Endocrinology, Diabetes, Hypertension and Nutrition, Faculty of Medicine, University of Geneva, Rue Michel-Servet, 1, CH-1211, 14, 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 of Geneva (iGE3), University of Geneva, Geneva, Switzerland
| | - Anne-Marie Makhlouf
- Department of Medicine, Division of Endocrinology, Diabetes, Hypertension and Nutrition, Faculty of Medicine, University of Geneva, Rue Michel-Servet, 1, CH-1211, 14, 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 of Geneva (iGE3), University of Geneva, Geneva, Switzerland
| | - Patrick Meyer
- Department of Medicine, Division of Endocrinology, Diabetes, Hypertension and Nutrition, Faculty of Medicine, University of Geneva, Rue Michel-Servet, 1, CH-1211, 14, Geneva, Switzerland
| | - Christel Tran
- Department of Medicine, Division of Endocrinology, Diabetes, Hypertension and Nutrition, Faculty of Medicine, University of Geneva, Rue Michel-Servet, 1, CH-1211, 14, Geneva, Switzerland
- Center for Molecular Diseases, Division of Genetic Medicine, Lausanne University Hospital, Lausanne, Switzerland
| | - Zoltan Pataky
- Division for Therapeutic Patient Education for Chronic Diseases, University Hospital of Geneva, Geneva, Switzerland
| | - Alain Golay
- Division for Therapeutic Patient Education for Chronic Diseases, University Hospital of Geneva, Geneva, Switzerland
| | - Guillaume Rey
- Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Institute of Genetics and Genomics of Geneva (iGE3), University of Geneva, Geneva, Switzerland
- Department of Genetic Medicine and Development, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Cédric Howald
- Institute of Genetics and Genomics of Geneva (iGE3), University of Geneva, Geneva, Switzerland
- Department of Genetic Medicine and Development, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Emmanouil T Dermitzakis
- Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- Institute of Genetics and Genomics of Geneva (iGE3), University of Geneva, Geneva, Switzerland
- Department of Genetic Medicine and Development, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Claude Pichard
- Department of Medicine, Division of Endocrinology, Diabetes, Hypertension and Nutrition, Faculty of Medicine, University of Geneva, Rue Michel-Servet, 1, CH-1211, 14, Geneva, Switzerland
| | - Jacques Philippe
- Department of Medicine, Division of Endocrinology, Diabetes, Hypertension and Nutrition, Faculty of Medicine, University of Geneva, Rue Michel-Servet, 1, CH-1211, 14, Geneva, Switzerland
- Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Steven A Brown
- Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | - Charna Dibner
- Department of Medicine, Division of Endocrinology, Diabetes, Hypertension and Nutrition, Faculty of Medicine, University of Geneva, Rue Michel-Servet, 1, CH-1211, 14, 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 of Geneva (iGE3), University of Geneva, Geneva, Switzerland.
| |
Collapse
|
33
|
Zhu J, Risacher SL, West JD, Deardorff R, Tallman EF, Brown SA, Gao S, Apostolova LG, Saykin AJ. P3-409: WORKING MEMORY TASK-BASED FMRI IN SUBJECTIVE COGNITIVE DECLINE: EVIDENCE FOR NEURAL COMPENSATION. Alzheimers Dement 2019. [DOI: 10.1016/j.jalz.2019.06.3443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Jian Zhu
- Indiana Alzheimer Disease Center; Indianapolis IN USA
- Indiana University School of Medicine; Indianapolis IN USA
| | - Shannon L. Risacher
- Indiana Alzheimer Disease Center; Indianapolis IN USA
- Indiana University School of Medicine; Indianapolis IN USA
| | - John D. West
- Indiana Alzheimer Disease Center; Indianapolis IN USA
- Indiana University School of Medicine; Indianapolis IN USA
| | | | - Eileen F. Tallman
- Indiana Alzheimer Disease Center; Indianapolis IN USA
- Indiana University School of Medicine; Indianapolis IN USA
| | - Steven A. Brown
- Indiana Alzheimer Disease Center; Indianapolis IN USA
- Indiana University School of Medicine; Indianapolis IN USA
| | - Sujuan Gao
- Indiana Alzheimer Disease Center; Indianapolis IN USA
- Indiana University School of Medicine; Indianapolis IN USA
| | - Liana G. Apostolova
- Indiana Alzheimer Disease Center; Indianapolis IN USA
- Indiana University School of Medicine; Indianapolis IN USA
| | - Andrew J. Saykin
- Indiana Alzheimer Disease Center; Indianapolis IN USA
- Indiana University School of Medicine; Indianapolis IN USA
| |
Collapse
|
34
|
Abstract
How the brain performs higher cognitive functions such as learning and memory is traditionally studied by investigating how neurons work. However, over the past two decades, evidence has accumulated which suggests that components of the extracellular matrix contribute to the storing of information through learning processes. Thus, matrix regulation – either changes in the protein composition of the perineural network surrounding neurons or cleavage of this network by specific metalloproteases – could be relevant to the many psychiatric disorders that are shaped by previous experiences, i.e. by learning and plasticity. This includes disorders which are a direct consequence of past experiences and ones where previous experiences constitute a risk factor. Psychotherapy is one of the first-line treatments for most psychiatric conditions, and involves learning and plasticity. Here, we review selected publications pertaining to experience dependence in psychiatric conditions and summarise evidence of roles for the extracellular matrix in learning and memory. We then suggest how control of the extracellular matrix could be leveraged for innovative treatments and, more generally, discuss possible aetiological effects of extracellular matrix alterations in psychiatric disorders.
Collapse
Affiliation(s)
- Dominik Bach
- Department of Psychiatry, Psychotherapy, and Psychosomatics, Psychiatric Hospital, University of Zurich, Switzerland / Wellcome Centre for Human Neuroimaging and Max Planck/UCL Centre for Computational Psychiatry and Ageing Research, University College London, UK
| | - Steven A Brown
- Institute of Pharmacology and Toxicology, University of Zurich, Switzerland
| | - Birgit Kleim
- Department of Psychiatry, Psychotherapy, and Psychosomatics, Psychiatric Hospital, University of Zurich, Switzerland / Department of Experimental Psychopathology and Psychotherapy, University of Zurich, Switzerland
| | - Shiva Tyagarajan
- Institute of Pharmacology and Toxicology, University of Zurich, Switzerland
| |
Collapse
|
35
|
Brown SA, Basu A, Kovatchev BP. Beyond HbA 1c : using continuous glucose monitoring metrics to enhance interpretation of treatment effect and improve clinical decision-making. Diabet Med 2019; 36:679-687. [PMID: 30848545 DOI: 10.1111/dme.13944] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/05/2019] [Indexed: 12/27/2022]
Abstract
Assessment of glycaemic outcomes in the management of Type 1 and Type 2 diabetes has been revolutionized in the past decade with the increasing availability of accurate, user-friendly continuous glucose monitoring (CGM). This advancement has brought a need for new techniques to appropriately analyse and understand the voluminous and complex CGM data for application in research-related goals and clinical guidance for individuals. Traditionally, HbA1c was established using the Diabetes Control and Complications Trial (DCCT) and other trials as the ultimate measure of glycaemic control in terms of efficacy and, by default, risk of microvascular complications of diabetes. However, it is acknowledged that HbA1c alone is inadequate at describing an individual's daily glycaemic variation and risks for hypo- and hyperglycaemia, and it does not provide the guidance needed to decrease those risks. CGM data provide means by which to characterize an individual's daily glycaemic excursions on a different time scale measured in minutes rather than months. As a consequence, clinical reports, such as the ambulatory glucose profile, increasingly include summary statistics related to averages (mean glucose, time in range) as well as markers related to glycaemic variability (coefficient of variation, standard deviation). However, there is a need to translate those metrics into specific risks that can be addressed in an actionable plan by individuals with diabetes and providers. This review presents several clinical scenarios of glycaemic outcomes from CGM data that can be analysed to describe glycaemic variability and its attendant risks of hyperglycaemia and hypoglycaemia, moving towards relevant interpretation of the complex CGM data streams.
Collapse
Affiliation(s)
- S A Brown
- University of Virginia Center for Diabetes Technology, Charlottesville, VA, USA
- University of Virginia Division of Endocrinology and Metabolism, Charlottesville, VA, USA
| | - A Basu
- University of Virginia Center for Diabetes Technology, Charlottesville, VA, USA
- University of Virginia Division of Endocrinology and Metabolism, Charlottesville, VA, USA
| | - B P Kovatchev
- University of Virginia Division of Endocrinology and Metabolism, Charlottesville, VA, USA
| |
Collapse
|
36
|
Miladinović Đ, Muheim C, Bauer S, Spinnler A, Noain D, Bandarabadi M, Gallusser B, Krummenacher G, Baumann C, Adamantidis A, Brown SA, Buhmann JM. SPINDLE: End-to-end learning from EEG/EMG to extrapolate animal sleep scoring across experimental settings, labs and species. PLoS Comput Biol 2019; 15:e1006968. [PMID: 30998681 PMCID: PMC6490936 DOI: 10.1371/journal.pcbi.1006968] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 04/30/2019] [Accepted: 03/20/2019] [Indexed: 11/18/2022] Open
Abstract
Understanding sleep and its perturbation by environment, mutation, or medication remains a central problem in biomedical research. Its examination in animal models rests on brain state analysis via classification of electroencephalographic (EEG) signatures. Traditionally, these states are classified by trained human experts by visual inspection of raw EEG recordings, which is a laborious task prone to inter-individual variability. Recently, machine learning approaches have been developed to automate this process, but their generalization capabilities are often insufficient, especially across animals from different experimental studies. To address this challenge, we crafted a convolutional neural network-based architecture to produce domain invariant predictions, and furthermore integrated a hidden Markov model to constrain state dynamics based upon known sleep physiology. Our method, which we named SPINDLE (Sleep Phase Identification with Neural networks for Domain-invariant LEearning) was validated using data of four animal cohorts from three independent sleep labs, and achieved average agreement rates of 99%, 98%, 93%, and 97% with scorings from five human experts from different labs, essentially duplicating human capability. It generalized across different genetic mutants, surgery procedures, recording setups and even different species, far exceeding state-of-the-art solutions that we tested in parallel on this task. Moreover, we show that these scored data can be processed for downstream analyzes identical to those from human-scored data, in particular by demonstrating the ability to detect mutation-induced sleep alteration. We provide to the scientific community free usage of SPINDLE and benchmarking datasets as an online server at https://sleeplearning.ethz.ch. Our aim is to catalyze high-throughput and well-standardized experimental studies in order to improve our understanding of sleep.
Collapse
Affiliation(s)
- Đorđe Miladinović
- Department of Computer Science, ETH Zurich, Zürich, Switzerland
- Max Planck Institute for Intelligent Systems, Tübingen, Germany
| | - Christine Muheim
- Chronobiology and Sleep Research Group, University of Zurich, Zürich, Switzerland
- Department of Biomedical Sciences, Washington State University, Spokane, Washington, United States of America
| | - Stefan Bauer
- Department of Computer Science, ETH Zurich, Zürich, Switzerland
- Max Planck Institute for Intelligent Systems, Tübingen, Germany
| | - Andrea Spinnler
- Chronobiology and Sleep Research Group, University of Zurich, Zürich, Switzerland
| | - Daniela Noain
- Department of Neurology, University Hospital Zurich, Zürich, Switzerland
| | | | | | | | - Christian Baumann
- Department of Neurology, University Hospital Zurich, Zürich, Switzerland
| | | | - Steven A. Brown
- Chronobiology and Sleep Research Group, University of Zurich, Zürich, Switzerland
| | | |
Collapse
|
37
|
Abstract
We report a detailed study of neuromorphic switching behaviour in inherently complex percolating networks of self-assembled metal nanoparticles. We show that variation of the strength and duration of the electric field applied to this network of synapse-like atomic switches allows us to control the switching dynamics. Switching is observed for voltages above a well-defined threshold, with higher voltages leading to increased switching rates. We demonstrate two behavioral archetypes and show how the switching dynamics change as a function of duration and amplitude of the voltage stimulus. We show that the state of each synapse can influence the activity of the other synapses, leading to complex switching dynamics. We further demonstrate the influence of the morphology of the network on the measured device properties, and the constraints imposed by the overall network conductance. The correlated switching dynamics, device stability over long periods, and the simplicity of the device fabrication provide an attractive pathway to practical implementation of on-chip neuromorphic computing.
Collapse
Affiliation(s)
- S K Bose
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Physical and Chemical Sciences, University of Canterbury, Private Bag 4800, Christchurch 8140, New Zealand.
| | | | | | | |
Collapse
|
38
|
Collins B, Brown SA. Beyond the molecular clock. Current Opinion in Physiology 2018. [DOI: 10.1016/j.cophys.2018.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
39
|
Austrom MG, Fowler NR, Apostolova LG, Gao S, Brown SA, Saxman D, Richards R, Campbell C, Hendrie HC. P2‐546: A COMMUNITY‐BASED OUTREACH MODEL TO INCREASE AFRICAN AMERICAN PARTICIPATION IN AD RESEARCH. Alzheimers Dement 2018. [DOI: 10.1016/j.jalz.2018.06.1240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Mary Guerriero Austrom
- Indiana Alzheimer Disease CenterIndianapolisINUSA
- Diversity AffairsIndianapolisINUSA
- Indiana University School of MedicineIndianapolisINUSA
| | - Nicole R. Fowler
- Indiana Alzheimer Disease CenterIndianapolisINUSA
- Indiana University Center for Aging ResearchIndianapolisINUSA
| | - Liana G. Apostolova
- Indiana Alzheimer Disease CenterIndianapolisINUSA
- Indiana University School of MedicineIndianapolisINUSA
- Department of NeurologyIndiana University School of MedicineIndianapolisINUSA
| | - Sujuan Gao
- Indiana Alzheimer Disease CenterIndianapolisINUSA
- Indiana University School of MedicineIndianapolisINUSA
| | | | - Denise Saxman
- Alzheimer's Association of Greater IndianaIndianapolisINUSA
| | | | | | | |
Collapse
|
40
|
Schmitt K, Grimm A, Dallmann R, Oettinghaus B, Restelli LM, Witzig M, Ishihara N, Mihara K, Ripperger JA, Albrecht U, Frank S, Brown SA, Eckert A. Circadian Control of DRP1 Activity Regulates Mitochondrial Dynamics and Bioenergetics. Cell Metab 2018; 27:657-666.e5. [PMID: 29478834 DOI: 10.1016/j.cmet.2018.01.011] [Citation(s) in RCA: 163] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 01/06/2017] [Accepted: 01/19/2018] [Indexed: 01/20/2023]
Abstract
Mitochondrial fission-fusion dynamics and mitochondrial bioenergetics, including oxidative phosphorylation and generation of ATP, are strongly clock controlled. Here we show that these circadian oscillations depend on circadian modification of dynamin-related protein 1 (DRP1), a key mediator of mitochondrial fission. We used a combination of in vitro and in vivo models, including human skin fibroblasts and DRP1-deficient or clock-deficient mice, to show that these dynamics are clock controlled via circadian regulation of DRP1. Genetic or pharmacological abrogation of DRP1 activity abolished circadian network dynamics and mitochondrial respiratory activity and eliminated circadian ATP production. Pharmacological silencing of pathways regulating circadian metabolism and mitochondrial function (e.g., sirtuins, AMPK) also altered DRP1 phosphorylation, and abrogation of DRP1 activity impaired circadian function. Our findings provide new insight into the crosstalk between the mitochondrial network and circadian cycles.
Collapse
Affiliation(s)
- Karen Schmitt
- Neurobiology Lab for Brain Aging and Mental Health, Transfaculty Research Platform, Molecular & Cognitive Neuroscience, University of Basel, Basel, Switzerland; Psychiatric University Clinics, University of Basel, Basel, Switzerland
| | - Amandine Grimm
- Neurobiology Lab for Brain Aging and Mental Health, Transfaculty Research Platform, Molecular & Cognitive Neuroscience, University of Basel, Basel, Switzerland; Psychiatric University Clinics, University of Basel, Basel, Switzerland
| | - Robert Dallmann
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland
| | - Bjoern Oettinghaus
- Division of Neuropathology, Institute of Pathology, University Hospital Basel, Basel, Switzerland
| | - Lisa Michelle Restelli
- Division of Neuropathology, Institute of Pathology, University Hospital Basel, Basel, Switzerland
| | - Melissa Witzig
- Neurobiology Lab for Brain Aging and Mental Health, Transfaculty Research Platform, Molecular & Cognitive Neuroscience, University of Basel, Basel, Switzerland; Psychiatric University Clinics, University of Basel, Basel, Switzerland
| | - Naotada Ishihara
- Department of Protein Biochemistry, Institute of Life Science, Kurume University, Kurume 839-0864, Japan
| | - Katsuyoshi Mihara
- Department of Molecular Biology, Graduate School of Medical Science, Kyushu University, Fukuoka 812-8582, Japan
| | - Jürgen A Ripperger
- Department of Biology, Unit of Biochemistry, University of Fribourg, Fribourg, Switzerland
| | - Urs Albrecht
- Department of Biology, Unit of Biochemistry, University of Fribourg, Fribourg, Switzerland
| | - Stephan Frank
- Division of Neuropathology, Institute of Pathology, University Hospital Basel, Basel, Switzerland
| | - Steven A Brown
- Chronobiology and Sleep Research Group, Institute of Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland.
| | - Anne Eckert
- Neurobiology Lab for Brain Aging and Mental Health, Transfaculty Research Platform, Molecular & Cognitive Neuroscience, University of Basel, Basel, Switzerland; Psychiatric University Clinics, University of Basel, Basel, Switzerland.
| |
Collapse
|
41
|
Afonso T, Giguère S, Brown SA, Barton MH, Rapoport G, Barba M, Dembek KA, Toribio RE, Coleman AE. Preliminary investigation of orally administered benazepril in horses with left-sided valvular regurgitation. Equine Vet J 2017; 50:446-451. [PMID: 29044678 DOI: 10.1111/evj.12773] [Citation(s) in RCA: 5] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 10/11/2017] [Indexed: 11/26/2022]
Abstract
BACKGROUND Despite the paucity of data available, orally administered angiotensin-converting enzyme (ACE) inhibitors are empirically used in horses with valvular regurgitation. OBJECTIVE Evaluate the echocardiographic and hormonal changes in response to oral benazepril in horses with left-sided valvular regurgitation. STUDY DESIGN Prospective, randomised double-blind, placebo-controlled trial. METHODS Horses with mitral valve (MR) and/or aortic valve regurgitation (AR) received oral benazepril (n = 6) at a dosage of 1 mg/kg q 12 h or a placebo (n = 5) for 28 days. Echocardiography was performed before drug administration and after 28 days of treatment. Plasma renin activity, serum ACE activity, angiotensin II concentration, aldosterone concentration and biochemical variables were measured before drug administration and after 7 and 28 days of treatment. RESULTS Relative to baseline, horses treated with benazepril had statistically significant reduction in left ventricular internal diameter in systole (mean difference between groups = -0.97 cm; 95% CI = -1.5 to -0.43 cm), aortic sinus diameter (-0.31 cm; -0.54 to -0.07 cm), and percentage of the aortic annulus diameter occupied by the base of the AR jet (-17.05%; -31.17 to -2.93%) compared with horses receiving a placebo. In addition, horses treated with benazepril had a significantly greater increase in cardiac output (11.95 L/min; 1.17-22.73 L/min) and fractional shortening (7.59%; 3.3-11.88%) compared with horses receiving a placebo. Despite profound serum ACE inhibition, renin activity and concentrations of angiotensin II and aldosterone were not significantly different between treatment groups or among time points. MAIN LIMITATIONS Very small sample size and short treatment period. CONCLUSIONS Treatment with oral benazepril resulted in statistically significant echocardiographic changes that might indicate reduced cardiac afterload in horses with left-sided valvular regurgitation. Additional studies with a larger sample size will be necessary to determine if administration of benazepril is beneficial in horses with valvular regurgitation. The Summary is available in Spanish - see Supporting Information.
Collapse
Affiliation(s)
- T Afonso
- Department of Large Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| | - S Giguère
- Department of Large Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| | - S A Brown
- Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| | - M H Barton
- Department of Large Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| | - G Rapoport
- Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| | - M Barba
- Department of Clinical Sciences, College of Veterinary Medicine, Auburn University, Auburn, Alabama, USA
| | - K A Dembek
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, USA
| | - R E Toribio
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, USA
| | - A E Coleman
- Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| |
Collapse
|
42
|
Wang X, Bian G, Xu C, Wang P, Hu H, Zhou W, Brown SA, Chiang TC. Topological phases in double layers of bismuthene and antimonene. Nanotechnology 2017; 28:395706. [PMID: 28745615 DOI: 10.1088/1361-6528/aa825f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Two-dimensional topological insulators show great promise for spintronic applications. Much attention has been placed on single atomic or molecular layers, such as bismuthene. The selections of such materials are, however, limited. To broaden the base of candidate materials with desirable properties for applications, we report herein an exploration of the physics of double layers of bismuthene and antimonene. The electronic structure of a film depends on the number of layers, and it can be modified by epitaxial strain, by changing the effective spin-orbit coupling strength, and by the manner in which the layers are geometrically stacked. First-principles calculations for the double layers reveal a number of phases, including topological insulators, topological semimetals, Dirac semimetals, trivial semimetals, and trivial insulators. Their phase boundaries and the stability of the phases are investigated. The results illustrate a rich pattern of phases that can be realized by tuning lattice strain and effective spin-orbit coupling.
Collapse
Affiliation(s)
- Xiaoxiong Wang
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China. Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801-3080, United States of America. Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, 104 South Goodwin Avenue, Urbana, Illinois 61801-2902, United States of America
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Gaspar L, Howald C, Popadin K, Maier B, Mauvoisin D, Moriggi E, Gutierrez-Arcelus M, Falconnet E, Borel C, Kunz D, Kramer A, Gachon F, Dermitzakis ET, Antonarakis SE, Brown SA. The genomic landscape of human cellular circadian variation points to a novel role for the signalosome. eLife 2017; 6:e24994. [PMID: 28869038 PMCID: PMC5601996 DOI: 10.7554/elife.24994] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 09/01/2017] [Indexed: 11/18/2022] Open
Abstract
The importance of natural gene expression variation for human behavior is undisputed, but its impact on circadian physiology remains mostly unexplored. Using umbilical cord fibroblasts, we have determined by genome-wide association how common genetic variation impacts upon cellular circadian function. Gene set enrichment points to differences in protein catabolism as one major source of clock variation in humans. The two most significant alleles regulated expression of COPS7B, a subunit of the COP9 signalosome. We further show that the signalosome complex is imported into the nucleus in timed fashion to stabilize the essential circadian protein BMAL1, a novel mechanism to oppose its proteasome-mediated degradation. Thus, circadian clock properties depend in part upon a genetically-encoded competition between stabilizing and destabilizing forces, and genetic alterations in these mechanisms provide one explanation for human chronotype.
Collapse
Affiliation(s)
- Ludmila Gaspar
- Institute of Pharmacology and ToxicologyUniversity of ZurichZurichSwitzerland
| | - Cedric Howald
- Department of Genetic Medicine and DevelopmentUniversity of GenevaGenevaSwitzerland
- Institute of Genetics and Genomics in GenevaUniversity of GenevaGenevaSwitzerland
| | - Konstantin Popadin
- Department of Genetic Medicine and DevelopmentUniversity of GenevaGenevaSwitzerland
| | - Bert Maier
- Charité–UniversitätsmedizinLaboratory of ChronobiologyBerlinGermany
| | - Daniel Mauvoisin
- Department of Pharmacology and ToxicologyUniversity of LausanneLausanneSwitzerland
| | - Ermanno Moriggi
- Institute of Pharmacology and ToxicologyUniversity of ZurichZurichSwitzerland
| | - Maria Gutierrez-Arcelus
- Department of Genetic Medicine and DevelopmentUniversity of GenevaGenevaSwitzerland
- Institute of Genetics and Genomics in GenevaUniversity of GenevaGenevaSwitzerland
| | - Emilie Falconnet
- Department of Genetic Medicine and DevelopmentUniversity of GenevaGenevaSwitzerland
- Institute of Genetics and Genomics in GenevaUniversity of GenevaGenevaSwitzerland
| | - Christelle Borel
- Department of Genetic Medicine and DevelopmentUniversity of GenevaGenevaSwitzerland
- Institute of Genetics and Genomics in GenevaUniversity of GenevaGenevaSwitzerland
| | - Dieter Kunz
- Institute of Physiology, Charité-Universitätsmedizin Berlin, Working Group Sleep Research & Clinical ChronobiologyBerlinGermany
| | - Achim Kramer
- Charité–UniversitätsmedizinLaboratory of ChronobiologyBerlinGermany
| | - Frederic Gachon
- Department of Pharmacology and ToxicologyUniversity of LausanneLausanneSwitzerland
| | - Emmanouil T Dermitzakis
- Department of Genetic Medicine and DevelopmentUniversity of GenevaGenevaSwitzerland
- Institute of Genetics and Genomics in GenevaUniversity of GenevaGenevaSwitzerland
| | - Stylianos E Antonarakis
- Department of Genetic Medicine and DevelopmentUniversity of GenevaGenevaSwitzerland
- Institute of Genetics and Genomics in GenevaUniversity of GenevaGenevaSwitzerland
| | - Steven A Brown
- Institute of Pharmacology and ToxicologyUniversity of ZurichZurichSwitzerland
| |
Collapse
|
44
|
Ard SG, Martinez O, Brown SA, Sawyer JC, Armentrout PB, Viggiano AA, Shuman NS. Reactivity of 4Fe +(CO) n=0-2 + O 2: oxidation of CO by O 2 at an isolated metal atom. Phys Chem Chem Phys 2017; 19:8768-8777. [PMID: 28275770 DOI: 10.1039/c6cp08703e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The kinetics of 4Fe+(CO)n=0-2 + O2 are measured under thermal conditions from 300-600 K using a selected-ion flow tube apparatus. Both the bare metal and n = 2 cations are inert to reaction over this temperature range, but 4Fe+(CO) reacts rapidly (k = 3.2 ± 0.8 × 10-10 cm3 s-1 at 300 K, 52% of the collisional rate coefficient) to form FeO+ + CO2. This is an example of the oxidation of CO by O2 occurring entirely on a single non-noble metal atom. The reaction of the bare metal reaction is known to be endothermic, such that this result is expected; however, the n = 2 reaction has highly exothermic product channels available, such that the lack of reaction is surprising in light of the n = 1 reactivity. Stationary points along all three reaction coordinates are calculated using the TPSSh hybrid functional. These surfaces show that the n = 1 reaction is an example of two-state reactivity; the reaction proceeds initially on the sextet surface over a submerged barrier to a structure with an O-O bond distance longer than that in O2, but must cross to the quartet surface in order to proceed over a second submerged barrier to rearrange to form CO2. The n = 2 reaction does not proceed because, on all spin surfaces, the transition state corresponding to O-O separation is at higher energy than the separated reactants. The difference between the n = 1 and n = 2 reactions is not a result of steric effects, but rather because the O2 is more strongly bound to Fe in the entrance well of the n = 1 case, and that energy is available to overcome the rate-limiting barrier to O-O cleavage. Experimental verification of some of these details are provided by guided ion beam tandem mass spectrometry results. The kinetic energy dependence of the n = 1 reaction shows evidence for a curve crossing and yields relevant thermochemistry for competing reaction channels.
Collapse
Affiliation(s)
- Shaun G Ard
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, NM 87117, USA.
| | - Oscar Martinez
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, NM 87117, USA.
| | - Steven A Brown
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, NM 87117, USA.
| | - Jordan C Sawyer
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, NM 87117, USA.
| | - P B Armentrout
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
| | - Albert A Viggiano
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, NM 87117, USA.
| | - Nicholas S Shuman
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, NM 87117, USA.
| |
Collapse
|
45
|
Azzi A, Evans JA, Leise T, Myung J, Takumi T, Davidson AJ, Brown SA. Network Dynamics Mediate Circadian Clock Plasticity. Neuron 2017; 93:441-450. [PMID: 28065650 DOI: 10.1016/j.neuron.2016.12.022] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [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: 10/22/2015] [Revised: 09/01/2016] [Accepted: 12/09/2016] [Indexed: 11/19/2022]
Abstract
A circadian clock governs most aspects of mammalian behavior. Although its properties are in part genetically determined, altered light-dark environment can change circadian period length through a mechanism requiring de novo DNA methylation. We show here that this mechanism is mediated not via cell-autonomous clock properties, but rather through altered networking within the suprachiasmatic nuclei (SCN), the circadian "master clock," which is DNA methylated in region-specific manner. DNA methylation is necessary to temporally reorganize circadian phasing among SCN neurons, which in turn changes the period length of the network as a whole. Interruption of neural communication by inhibiting neuronal firing or by physical cutting suppresses both SCN reorganization and period changes. Mathematical modeling suggests, and experiments confirm, that this SCN reorganization depends upon GABAergic signaling. Our results therefore show that basic circadian clock properties are governed by dynamic interactions among SCN neurons, with neuroadaptations in network function driven by the environment.
Collapse
Affiliation(s)
- Abdelhalim Azzi
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| | - Jennifer A Evans
- Department of Biomedical Sciences, College of Health Sciences, Marquette University, 1250 W. Wisconsin Ave., Milwaukee, WI 53233, USA
| | - Tanya Leise
- Department of Mathematics and Statistics, Amherst College, 220 S. Pleasant St., Amherst, MA 01002, USA
| | - Jihwan Myung
- RIKEN Brain Science Institute (BSI), 2-1 Hirosawa Wako City, Saitama 351-0198, Japan
| | - Toru Takumi
- RIKEN Brain Science Institute (BSI), 2-1 Hirosawa Wako City, Saitama 351-0198, Japan
| | - Alec J Davidson
- Department of Neurobiology, Morehouse School of Medicine, 720 Westview Dr., Atlanta, GA 30310, USA
| | - Steven A Brown
- Institute of Pharmacology and Toxicology, University of Zurich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
| |
Collapse
|
46
|
Rattanabannakit C, Risacher SL, Gao S, Lane KA, Brown SA, McDonald BC, Unverzagt FW, Apostolova LG, Saykin AJ, Farlow MR. The Cognitive Change Index as a Measure of Self and Informant Perception of Cognitive Decline: Relation to Neuropsychological Tests. J Alzheimers Dis 2016; 51:1145-55. [PMID: 26923008 DOI: 10.3233/jad-150729] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND The perception of cognitive decline by individuals and those who know them well ("informants") has been inconsistently associated with objective cognitive performance, but strongly associated with depressive symptoms. OBJECTIVE We investigated associations of self-report, informant-report, and discrepancy between self- and informant-report of cognitive decline obtained from the Cognitive Change Index (CCI) with cognitive test performance and self-reported depressive symptoms. METHODS 267 participants with normal cognition, mild cognitive impairment (MCI), or mild dementia were included from a cohort study and memory clinic. Association of test performance and self-rated depression (Geriatric Depression Scale, GDS) with CCI scores obtained from subjects (CCI-S), their informants (CCI-I), and discrepancy scores between subjects and informants (CCI-D; CCI-S minus CCI-I) were analyzed using correlation and analysis of covariance (ANCOVA) models. RESULTS CCI-S and CCI-I scores showed high internal consistency (Cronbach alpha 0.96 and 0.98, respectively). Higher scores on CCI-S and CCI-I, and lower scores on the CCI-D, were associated with lower performance on various cognitive tests in both univariate and in ANCOVA models adjusted for age, gender, and education. Adjustment for GDS slightly weakened the relationships between CCI and test performance but most remained significant. CONCLUSION Self- and informant-report of cognitive decline, as measured by the CCI, show moderately strong relationships with objective test performance independent of age, gender, education, and depressive symptoms. The CCI appears to be a valid cross-sectional measure of self and informant perception of cognitive decline across the continuum of functioning. Studies are needed to address the relationship of CCI scores to longitudinal outcome.
Collapse
Affiliation(s)
- Chatchawan Rattanabannakit
- Department of Neurology, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA.,Division of Neurology, Department of Internal Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Shannon L Risacher
- Department of Radiology and Imaging Sciences, Center for Neuroimaging, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Sujuan Gao
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Kathleen A Lane
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Steven A Brown
- Department of Biostatistics, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Brenna C McDonald
- Department of Neurology, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Radiology and Imaging Sciences, Center for Neuroimaging, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Frederick W Unverzagt
- Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Liana G Apostolova
- Department of Neurology, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Radiology and Imaging Sciences, Center for Neuroimaging, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Andrew J Saykin
- Department of Neurology, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Radiology and Imaging Sciences, Center for Neuroimaging, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Psychiatry, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Martin R Farlow
- Department of Neurology, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Alzheimer Disease Center, Indiana University School of Medicine, Indianapolis, IN, USA
| |
Collapse
|
47
|
Langouët M, Mircsof D, Rio M, Amiel J, Brown SA, Colleaux L. [Mutations in NONO lead to syndromic intellectual disability and inhibitory synaptic defects]. Med Sci (Paris) 2016; 32:571-3. [PMID: 27406762 DOI: 10.1051/medsci/20163206015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Maéva Langouët
- Inserm UMR 1163, laboratoire bases moléculaires et pathophysiologiques des désordres cognitifs, université Paris Descartes- Sorbonne Paris Cité, institut Imagine, hôpital Necker-Enfants Malades, 24, boulevard du Montparnasse, 75015 Paris, France
| | - Dennis Mircsof
- Chronobiology and Sleep Research Group, Neuromorphology Group, Institute of Pharmacology, Inserm UMR 1163, Hôpital Necker Enfants Malades, 149, rue de Sèvres, 75015 Paris, France - Neuromorphology Group, Institute of Pharmacology and Toxicology, University of Zurich, 190 Winterthurerstrasse, 8057 Zurich, Suisse
| | - Marlène Rio
- Inserm UMR 1163, laboratoire bases moléculaires et pathophysiologiques des désordres cognitifs, université Paris Descartes- Sorbonne Paris Cité, institut Imagine, hôpital Necker-Enfants Malades, 24, boulevard du Montparnasse, 75015 Paris, France
| | - Jeanne Amiel
- Inserm UMR 1163, laboratoire bases moléculaires et pathophysiologiques des désordres cognitifs, université Paris Descartes- Sorbonne Paris Cité, institut Imagine, hôpital Necker-Enfants Malades, 24, boulevard du Montparnasse, 75015 Paris, France
| | - Steven A Brown
- Chronobiology and Sleep Research Group, Neuromorphology Group, Institute of Pharmacology, Inserm UMR 1163, Hôpital Necker Enfants Malades, 149, rue de Sèvres, 75015 Paris, France
| | - Laurence Colleaux
- Inserm UMR 1163, laboratoire bases moléculaires et pathophysiologiques des désordres cognitifs, université Paris Descartes- Sorbonne Paris Cité, institut Imagine, hôpital Necker-Enfants Malades, 24, boulevard du Montparnasse, 75015 Paris, France
| |
Collapse
|
48
|
Mason JA, Robertson JD, McCosker J, Williams BA, Brown SA. Assessment and validation of a defined fluid restriction protocol in the use of subcutaneous desmopressin for children with inherited bleeding disorders. Haemophilia 2016; 22:700-5. [PMID: 27385253 DOI: 10.1111/hae.12949] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/28/2016] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Despite the availability of subcutaneous desmopressin (1-deamino-8-d-arginine vasopressin, SC-DDAVP) as a haemostatic agent for children with mild bleeding disorders, few publications specifically address the safety or efficacy of this mode of administration. AIM Our aim was to assess whether a defined fluid restriction protocol was effective in preventing hyponatremia in children receiving perioperative SC-DDAVP, and to document adequate biological and clinical response in this setting. METHODS We retrospectively analysed a cohort of children with mild bleeding disorders prescribed SC-DDAVP over a 5-year period following institution of a 'two-thirds maintenance' fluid restriction protocol. RESULTS Sixty-nine patients received SC-DDAVP following this protocol, including 15 with mild haemophilia A, 49 with von Willebrand disease (VWD) and five with platelet storage pool disorder. In patients who underwent formal preoperative assessment a complete or partial response was observed in 28/29 with type 1 VWD and 14/15 with mild haemophilia A. Perioperative SC-DDAVP provided excellent haemostasis in all patients, with no requirement for factor concentrate or blood products. Mild asymptomatic hyponatremia was detected in seven children who received multiple doses of DDAVP (lowest sodium 129 mmol L(-1) ); however, adherence to the prescribed fluid restriction protocol was questionable in six of these cases. Symptomatic hyponatremia was not observed. CONCLUSION Subcutaneous desmopressin was well-tolerated, with no serious side-effects observed, and good biological responses in preoperative trials. A two-thirds maintenance fluid regimen was effective at preventing symptomatic hyponatremia in our cohort, and is now the standard protocol for fluid restriction post-DDAVP administration in our centre.
Collapse
Affiliation(s)
- J A Mason
- Department of Haematology, Lady Cilento Children's Hospital, Brisbane, QLD, Australia.
| | - J D Robertson
- Department of Haematology, Lady Cilento Children's Hospital, Brisbane, QLD, Australia
| | - J McCosker
- Department of Haematology, Lady Cilento Children's Hospital, Brisbane, QLD, Australia
| | - B A Williams
- Department of Haematology, Lady Cilento Children's Hospital, Brisbane, QLD, Australia
| | - S A Brown
- Department of Haematology, Lady Cilento Children's Hospital, Brisbane, QLD, Australia
| |
Collapse
|
49
|
West JD, Risacher SL, Gandhi PK, Wu YC, Tallman EF, McDonald BC, Glazier BS, Apostolova LG, Farlow MR, Brosch JR, Gao S, Brown SA, Unverzagt FW, Wang D, Saykin AJ. P4‐173: Elevated Cerebral Blood Flow in Participants with Subjective Cognitive Decline. Alzheimers Dement 2016. [DOI: 10.1016/j.jalz.2016.06.2265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- John D. West
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Shannon L. Risacher
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Pratik K. Gandhi
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Yu-Chien Wu
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Eileen F. Tallman
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Brenna C. McDonald
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Bradley S. Glazier
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Liana G. Apostolova
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Martin R. Farlow
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Jared R. Brosch
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Sujuan Gao
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Steven A. Brown
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Frederick W. Unverzagt
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Danny Wang
- University of California, Los AngelesLos AngelesCA USA
| | - Andy J. Saykin
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| |
Collapse
|
50
|
West JD, Risacher SL, Gandhi PK, Wu YC, Tallman EF, McDonald BC, Apostolova LG, Farlow MR, Brosch JR, O'Neill DP, Gao S, Brown SA, Glazier BS, Unverzagt FW, Saykin AJ. IC‐P‐094: Association Between N‐Back Working Memory Activation on FMRI and Cognitive Assessment of Executive Function. Alzheimers Dement 2016. [DOI: 10.1016/j.jalz.2016.06.123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- John D. West
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Shannon L. Risacher
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Pratik K. Gandhi
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Yu-Chien Wu
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Eileen F. Tallman
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Brenna C. McDonald
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Liana G. Apostolova
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Martin R. Farlow
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Jared R. Brosch
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Darren P. O'Neill
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Sujuan Gao
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Steven A. Brown
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Bradley S. Glazier
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Frederick W. Unverzagt
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| | - Andy J. Saykin
- Indiana University School of MedicineIndianapolisIN USA
- Indiana Alzheimer Disease CenterIndianapolisIN USA
| |
Collapse
|