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Voermans NC, Yang C, Schouten M, Girard T, Stowell K, Riazi S, Kamsteeg EJ, Snoeck M. The use of guidelines to assess the risk of malignant hyperthermia in individuals with an RYR1 variant. Neuromuscul Disord 2024; 35:40-41. [PMID: 38007345 DOI: 10.1016/j.nmd.2023.10.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Accepted: 10/13/2023] [Indexed: 11/27/2023]
Affiliation(s)
- N C Voermans
- Neuromuscular Center Nijmegen, Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen Medical Center, The Netherlands
| | - C Yang
- Malignant Hyperthermia Investigation Unit, Department of Anesthesiology, Canisius Wilhelmina Hospital, Nijmegen, The Netherlands
| | - M Schouten
- Department of Human Genetics, Radboud university medical center, Nijmegen, The Netherlands
| | - T Girard
- Clinic for Anaesthesia and Malignant Hyperthermie Investigation Unit, University Hospital Basel, Basel, Switzerland
| | - K Stowell
- School of Natural Sciences, Massey University, Palmerston North, New Zealand
| | - S Riazi
- Department of Anesthesia, Malignant Hyperthermia Investigation Unit, University Health Network, University of Toronto, Toronto, Canada
| | - E J Kamsteeg
- Department of Human Genetics, Radboud university medical center, Nijmegen, The Netherlands
| | - M Snoeck
- Malignant Hyperthermia Investigation Unit, Department of Anesthesiology, Canisius Wilhelmina Hospital, Nijmegen, The Netherlands.
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2
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Schouten M, Dalle S, Mantini D, Koppo K. Cannabidiol and brain function: current knowledge and future perspectives. Front Pharmacol 2024; 14:1328885. [PMID: 38288087 PMCID: PMC10823027 DOI: 10.3389/fphar.2023.1328885] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 12/19/2023] [Indexed: 01/31/2024] Open
Abstract
Cannabidiol (CBD) is a naturally occurring non-psychoactive cannabinoid found in Cannabis sativa, commonly known as cannabis or hemp. Although currently available CBD products do not meet the safety standards of most food safety authorities to be approved as a dietary supplement or food additive, CBD has been gaining widespread attention in recent years due to its various potential health benefits. While primarily known for its therapeutic effects in managing epileptic seizures, psychosis, anxiety, (neuropathic) pain, and inflammation, CBD's influence on brain function has also piqued the interest of researchers and individuals seeking to enhance cognitive performance. The primary objective of this review is to gather, synthesize, and consolidate scientifically proven evidence on the impact of CBD on brain function and its therapeutic significance in treating neurological and mental disorders. First, basic background information on CBD, including its biomolecular properties and mechanisms of action is presented. Next, evidence for CBD effects in the human brain is provided followed by a discussion on the potential implications of CBD as a neurotherapeutic agent. The potential effectiveness of CBD in reducing chronic pain is considered but also in reducing the symptoms of various brain disorders such as epilepsy, Alzheimer's, Huntington's and Parkinson's disease. Additionally, the implications of using CBD to manage psychiatric conditions such as psychosis, anxiety and fear, depression, and substance use disorders are explored. An overview of the beneficial effects of CBD on aspects of human behavior, such as sleep, motor control, cognition and memory, is then provided. As CBD products remain largely unregulated, it is crucial to address the ethical concerns associated with their use, including product quality, consistency, and safety. Therefore, this review discusses the need for responsible research and regulation of CBD to ensure its safety and efficacy as a therapeutic agent for brain disorders or to stimulate behavioral and cognitive abilities of healthy individuals.
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Affiliation(s)
- Moniek Schouten
- Exercise Physiology Research Group, Department of Movement Sciences, KU Leuven, Leuven, Belgium
| | - Sebastiaan Dalle
- Exercise Physiology Research Group, Department of Movement Sciences, KU Leuven, Leuven, Belgium
| | - Dante Mantini
- Movement Control and Neuroplasticity Research Group, Department of Movement Sciences, KU Leuven, Leuven, Belgium
| | - Katrien Koppo
- Exercise Physiology Research Group, Department of Movement Sciences, KU Leuven, Leuven, Belgium
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3
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van Olst L, Kamermans A, van der Pol SMA, Rodríguez E, Hulshof LA, van Dijk RE, Vonk DN, Schouten M, Witte ME, de Vries HE, Middeldorp J. Age-associated systemic factors change central and peripheral immunity in adult male mice. Brain Behav Immun 2023; 111:395-411. [PMID: 37169133 DOI: 10.1016/j.bbi.2023.05.004] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 05/01/2023] [Accepted: 05/05/2023] [Indexed: 05/13/2023] Open
Abstract
Aging coincides with major changes in brain immunity that aid in a decline in neuronal function. Here, we postulate that systemic, pro-aging factors contribute to immunological changes that occur within the brain during aging. To investigate this hypothesis, we comprehensively characterized the central and peripheral immune landscape of 20-month-old male mice using cytometry by time-of-flight (CyTOF) and investigated the role of age-associated circulating factors. We found that CD8+ T cells expressing programmed cell death protein 1 (PD1) and tissue-resident memory CD8+ T cells accumulated in the aged brain while levels of memory T cells rose in the periphery. Injections of plasma derived from 20-month-old mice into 5-month-old receiving mice decreased the frequency of splenic and circulating naïve T cells, increased memory CD8+ T cells, and non-classical, patrolling monocytes in the spleen, and elevated levels of regulatory T cells and non-classical monocytes in the blood. Notably, CD8+ T cells accumulated within white matter areas of plasma-treated mice, which coincided with the expression of vascular cell adhesion molecule 1 (VCAM-1), a mediator of immune cell trafficking, on the brain vasculature. Taken together, we here describe age-related immune cell changes in the mouse brain and circulation and show that age-associated systemic factors induce the expansion of CD8+ T cells in the aged brain.
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Affiliation(s)
- L van Olst
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Amsterdam, the Netherlands; Amsterdam Neuroscience, Amsterdam, the Netherlands.
| | - A Kamermans
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Amsterdam, the Netherlands; Amsterdam Neuroscience, Amsterdam, the Netherlands
| | - S M A van der Pol
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Amsterdam, the Netherlands; Amsterdam Neuroscience, Amsterdam, the Netherlands
| | - E Rodríguez
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Amsterdam, the Netherlands; Cancer Center Amsterdam, Amsterdam, the Netherlands; Amsterdam Infection and Immunity Institute, Amsterdam, the Netherlands
| | - L A Hulshof
- Department of Translational Neuroscience, UMC Utrecht Brain Center, University Medical Centre Utrecht, University Utrecht, Utrecht, the Netherlands
| | - R E van Dijk
- Department of Translational Neuroscience, UMC Utrecht Brain Center, University Medical Centre Utrecht, University Utrecht, Utrecht, the Netherlands
| | - D N Vonk
- Department of Translational Neuroscience, UMC Utrecht Brain Center, University Medical Centre Utrecht, University Utrecht, Utrecht, the Netherlands
| | - M Schouten
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Amsterdam, the Netherlands; Amsterdam Neuroscience, Amsterdam, the Netherlands
| | - M E Witte
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Amsterdam, the Netherlands; Amsterdam Neuroscience, Amsterdam, the Netherlands; Amsterdam Infection and Immunity Institute, Amsterdam, the Netherlands
| | - H E de Vries
- Amsterdam UMC Location Vrije Universiteit Amsterdam, Department of Molecular Cell Biology and Immunology, Amsterdam, the Netherlands; Amsterdam Neuroscience, Amsterdam, the Netherlands
| | - J Middeldorp
- Department of Translational Neuroscience, UMC Utrecht Brain Center, University Medical Centre Utrecht, University Utrecht, Utrecht, the Netherlands; Department of Neurobiology and Aging, Biomedical Primate Research Centre, Rijswijk, the Netherlands
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Dalle S, Schouten M, Ramaekers M, Koppo K. The cannabinoid receptor 1 antagonist AM6545 stimulates the Akt-mTOR axis and in vivo muscle protein synthesis in a dexamethasone-induced muscle atrophy model. Mol Cell Endocrinol 2023; 563:111854. [PMID: 36682621 DOI: 10.1016/j.mce.2023.111854] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 12/14/2022] [Accepted: 01/12/2023] [Indexed: 01/21/2023]
Abstract
Cannabinoid receptor 1 (CB1) antagonists were shown to stimulate in vitro muscle protein synthesis, but this has never been confirmed in vivo. Therefore, this study investigated whether treatment with the CB1 antagonist AM6545 upregulates in vivo muscle anabolism. Chronic AM6545 treatment stimulated the Akt-mTOR axis and protein synthesis (+22%; p = 0.002) in the Tibialis Anterior, which protected mice from dexamethasone-induced muscle loss (-1% vs. -6% compared to healthy controls; p = 0.02). Accordingly, acute AM6545 treatment stimulated protein synthesis (+44%; p = 0.04) in the Tibialis Anterior but not Soleus. The anabolic upregulation was accompanied by ERK1/2 activation, whereas protein kinase A signaling remained unaffected, suggesting a CB1-independent mechanism. The present study for the first time shows that the CB1 antagonist AM6545 can upregulate the Akt-mTOR axis and in vivo muscle protein synthesis. However, future work applying genetic approaches should further uncover the signaling pathways via which AM6545 enhances muscle anabolism.
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Affiliation(s)
- Sebastiaan Dalle
- Exercise Physiology Research Group, Department of Movement Sciences, KU Leuven, Tervuursevest 101, 3001, Leuven, Belgium.
| | - Moniek Schouten
- Exercise Physiology Research Group, Department of Movement Sciences, KU Leuven, Tervuursevest 101, 3001, Leuven, Belgium.
| | - Monique Ramaekers
- Exercise Physiology Research Group, Department of Movement Sciences, KU Leuven, Tervuursevest 101, 3001, Leuven, Belgium.
| | - Katrien Koppo
- Exercise Physiology Research Group, Department of Movement Sciences, KU Leuven, Tervuursevest 101, 3001, Leuven, Belgium.
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5
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Hiroux C, Schouten M, de Glisezinski I, Simon C, Crampes F, Hespel P, Koppo K. Effect of increased protein intake and exogenous ketosis on body composition, energy expenditure and exercise capacity during a hypocaloric diet in recreational female athletes. Front Physiol 2023; 13:1063956. [PMID: 36714318 PMCID: PMC9880233 DOI: 10.3389/fphys.2022.1063956] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 12/28/2022] [Indexed: 01/15/2023] Open
Abstract
Introduction: Since low body weight is an important determinant of success in many sports such as gymnastics, martial arts and figure skating, athletes can benefit from effective weight loss strategies that preserve muscle mass and athletic performance. The present study investigates the effects of increased protein intake and exogenous ketosis on body composition, energy expenditure, exercise capacity, and perceptions of appetite and well-being during a hypocaloric diet in females. Methods: Thirty-two female recreational athletes (age: 22.2 ± .5 years; body weight: 58.3 ± .8 kg; BMI: 20.8 ± .2 kg·m-2) underwent 4 weeks of 30% caloric restriction and were randomized to receive either an increased daily amount of dietary protein (PROT, ∼2.0-2.2 g protein·kg-1·day-1), 3 × 20 g·day-1 of a ketone ester (KE), or an isocaloric placebo (PLA). Body composition was measured by DXA, resting energy expenditure (REE) by indirect calorimetry, exercise capacity during a VO2max test, appetite hormones were measured in serum, and perceptions of general well-being were evaluated via questionnaires. Results: The hypocaloric diet reduced body weight by 3.8 ± .3 kg in PLA, 3.2 ± .3 kg in KE and 2.4 ± .2 kg in PROT (Ptime<.0001). The drop in fat mass was similar between treatments (average: 2.6 ± .1 kg, Ptime<.0001), while muscle mass was only reduced in PLA and KE (average: .8 ± .2 kg, Ptime<.05), and remained preserved in PROT (Pinteraction<.01). REE [adjusted for lean mass] was reduced after caloric restriction in PLA (pre: 32.7 ± .5, post: 28.5 ± .6 kcal·day-1·kg-1) and PROT (pre: 32.9 ± 1.0, post: 28.4 ± 1.0 kcal·day-1·kg-1), but not in KE (pre: 31.8 ± .9, post: 30.4 ± .8 kcal·day-1·kg-1) (Pinteraction<.005). Furthermore, time to exhaustion during the VO2max test decreased in PLA (by 2.5 ± .7%, p < .05) but not in KE and PROT (Pinteraction<.05). Lastly, the perception of overall stress increased in PLA and PROT (p < .05), but not in KE (Pinteraction<.05). Conclusion: Increased protein intake effectively prevented muscle wasting and maintained exercise capacity during a period of caloric restriction in female recreational athletes. Furthermore, exogenous ketosis did not affect body composition, but showed its potential in weight management by preserving a drop in exercise capacity and REE and by improving overall stress parameters during a period of caloric restriction.
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Affiliation(s)
- Charlotte Hiroux
- Department of Movement Sciences, Exercise Physiology Research Group, KU Leuven, Leuven, Belgium
| | - Moniek Schouten
- Department of Movement Sciences, Exercise Physiology Research Group, KU Leuven, Leuven, Belgium
| | - Isabelle de Glisezinski
- INSERM, UMR 1048, Institute of Metabolic and Cardiovascular Diseases, Obesity research Laboratory, Paul Sabatier University, Toulouse, France,Physiological Functional Exploration Department, Toulouse University Hospitals, Toulouse, France
| | - Chantal Simon
- Carmen INSERM U1060, Human Nutrition Research Centre of Rhône-Alpes, NRA U1235, University of Lyon, Lyon, France
| | - François Crampes
- INSERM, UMR 1048, Institute of Metabolic and Cardiovascular Diseases, Obesity research Laboratory, Paul Sabatier University, Toulouse, France
| | - Peter Hespel
- Department of Movement Sciences, Exercise Physiology Research Group, KU Leuven, Leuven, Belgium
| | - Katrien Koppo
- Department of Movement Sciences, Exercise Physiology Research Group, KU Leuven, Leuven, Belgium,*Correspondence: Katrien Koppo,
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Schouten M, Dalle S, Koppo K. Molecular Mechanisms Through Which Cannabidiol May Affect Skeletal Muscle Metabolism, Inflammation, Tissue Regeneration, and Anabolism: A Narrative Review. Cannabis Cannabinoid Res 2022; 7:745-757. [PMID: 36454174 DOI: 10.1089/can.2022.0220] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Background: Cannabidiol (CBD), a nonintoxicating constituent of the cannabis plant, recently gained a lot of interest among athletes, since it is no longer considered as a prohibited substance by the World Anti-Doping Agency. The increasing prevalence of CBD use among athletes is driven by a perceived improvement in muscle recovery and a reduction in pain. However, compelling evidence from intervention studies is lacking and the precise mechanisms through which CBD may improve muscle recovery remain unknown. This highlights the need for more scientific studies and an evidence-based background. In the current review, the state-of-the-art knowledge on the effects of CBD on skeletal muscle tissue is summarized with special emphasis on the underlying mechanisms and molecular targets. More specifically, the large variety of receptor families that are believed to be involved in CBD's physiological effects are discussed. Furthermore, in vivo and in vitro studies that investigated the actual effects of CBD on skeletal muscle metabolism, inflammation, tissue regeneration, and anabolism are summarized, together with the functional effects of CBD supplementation on muscle recovery in human intervention trials. Overall, CBD was effective to increase the expression of metabolic regulators in muscle of obese mice (e.g., Akt, glycogen synthase kinase-3). CBD treatment in rodents reduced muscle inflammation following eccentric exercise (i.e., nuclear factor kappa B [NF-κB]), in a model of muscle dystrophy (e.g., interleukin-6, tumor necrosis factor alpha) and of obesity (e.g., COX-2, NF-κB). In addition, CBD did not affect in vitro or in vivo muscle anabolism, but improved satellite cell differentiation in dystrophic muscle. In humans, there are some indications that CBD supplementation improved muscle recovery (e.g., creatine kinase) and performance (e.g., squat performance). However, CBD doses were highly variable (between 16.7 and 150 mg) and there are some methodological concerns that should be considered. Conclusion: CBD has the prospective to become an adequate supplement that may improve muscle recovery. However, this research domain is still in its infancy and future studies addressing the molecular and functional effects of CBD in response to exercise are required to further elucidate the ergogenic potential of CBD.
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Affiliation(s)
- Moniek Schouten
- Exercise Physiology Research Group, Department of Movement Sciences, KU Leuven, Leuven, Belgium
| | - Sebastiaan Dalle
- Exercise Physiology Research Group, Department of Movement Sciences, KU Leuven, Leuven, Belgium
| | - Katrien Koppo
- Exercise Physiology Research Group, Department of Movement Sciences, KU Leuven, Leuven, Belgium
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7
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Dalle S, Schouten M, Koppo K. Letter to the Editor: The Receptor(s) via Which Cannabidiol Affects Muscle Signaling: In Need for More Insights. Cannabis Cannabinoid Res 2022; 7:717-718. [PMID: 34978895 PMCID: PMC9587765 DOI: 10.1089/can.2021.0210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Sebastiaan Dalle
- Department of Movements Sciences, Exercise Physiology Research Group, KU Leuven, Leuven, Belgium
| | - Moniek Schouten
- Department of Movements Sciences, Exercise Physiology Research Group, KU Leuven, Leuven, Belgium
| | - Katrien Koppo
- Department of Movements Sciences, Exercise Physiology Research Group, KU Leuven, Leuven, Belgium
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8
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Dalle S, Schouten M, Meeus G, Slagmolen L, Koppo K. Molecular networks underlying cannabinoid signaling in skeletal muscle plasticity. J Cell Physiol 2022; 237:3517-3540. [PMID: 35862111 DOI: 10.1002/jcp.30837] [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: 04/13/2022] [Revised: 07/01/2022] [Accepted: 07/08/2022] [Indexed: 11/07/2022]
Abstract
The cannabinoid system is ubiquitously present and is classically considered to engage in neural and immunity processes. Yet, the role of the cannabinoid system in the whole body and tissue metabolism via central and peripheral mechanisms is increasingly recognized. The present review provides insights in (i) how cannabinoid signaling is regulated via receptor-independent and -dependent mechanisms and (ii) how these signaling cascades (might) affect skeletal muscle plasticity and physiology. Receptor-independent mechanisms include endocannabinoid metabolism to eicosanoids and the regulation of ion channels. Alternatively, endocannabinoids can act as ligands for different classic (cannabinoid receptor 1 [CB1 ], CB2 ) and/or alternative (e.g., TRPV1, GPR55) cannabinoid receptors with a unique affinity, specificity, and intracellular signaling cascade (often tissue-specific). Antagonism of CB1 might hold clues to improve oxidative (mitochondrial) metabolism, insulin sensitivity, satellite cell growth, and muscle anabolism, whereas CB2 agonism might be a promising way to stimulate muscle metabolism and muscle cell growth. Besides, CB2 ameliorates muscle regeneration via macrophage polarization toward an anti-inflammatory phenotype, induction of MyoD and myogenin expression and antifibrotic mechanisms. Also TRPV1 and GPR55 contribute to the regulation of muscle growth and metabolism. Future studies should reveal how the cannabinoid system can be targeted to improve muscle quantity and/or quality in conditions such as ageing, disease, disuse, and metabolic dysregulation, taking into account challenges that are inherent to modulation of the cannabinoid system, such as central and peripheral side effects.
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Affiliation(s)
- Sebastiaan Dalle
- Department of Movement Sciences, Exercise Physiology Research Group, KU Leuven, Leuven, Belgium
| | - Moniek Schouten
- Department of Movement Sciences, Exercise Physiology Research Group, KU Leuven, Leuven, Belgium
| | - Gitte Meeus
- Department of Movement Sciences, Exercise Physiology Research Group, KU Leuven, Leuven, Belgium
| | - Lotte Slagmolen
- Department of Movement Sciences, Exercise Physiology Research Group, KU Leuven, Leuven, Belgium
| | - Katrien Koppo
- Department of Movement Sciences, Exercise Physiology Research Group, KU Leuven, Leuven, Belgium
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Braun F, Reumers S, Spillane J, Bohm J, Pennings M, Schouten M, van der Kooi A, Foley A, Bönnemann C, Kamsteeg E, Erasmus C, Schara-Schmidt U, Jungbluth H, Voermans N. CONGENITAL MYOPATHIES – CENTRONUCLEAR MYOPATHIES. Neuromuscul Disord 2021. [DOI: 10.1016/j.nmd.2021.07.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Schouten M, Bielefeld P, Garcia-Corzo L, Passchier EMJ, Gradari S, Jungenitz T, Pons-Espinal M, Gebara E, Martín-Suárez S, Lucassen PJ, De Vries HE, Trejo JL, Schwarzacher SW, De Pietri Tonelli D, Toni N, Mira H, Encinas JM, Fitzsimons CP. Circadian glucocorticoid oscillations preserve a population of adult hippocampal neural stem cells in the aging brain. Mol Psychiatry 2020; 25:1382-1405. [PMID: 31222184 PMCID: PMC7303016 DOI: 10.1038/s41380-019-0440-2] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 04/09/2019] [Accepted: 04/29/2019] [Indexed: 12/17/2022]
Abstract
A decrease in adult hippocampal neurogenesis has been linked to age-related cognitive impairment. However, the mechanisms involved in this age-related reduction remain elusive. Glucocorticoid hormones (GC) are important regulators of neural stem/precursor cells (NSPC) proliferation. GC are released from the adrenal glands in ultradian secretory pulses that generate characteristic circadian oscillations. Here, we investigated the hypothesis that GC oscillations prevent NSPC activation and preserve a quiescent NSPC pool in the aging hippocampus. We found that hippocampal NSPC populations lacking expression of the glucocorticoid receptor (GR) decayed exponentially with age, while GR-positive populations decayed linearly and predominated in the hippocampus from middle age onwards. Importantly, GC oscillations controlled NSPC activation and GR knockdown reactivated NSPC proliferation in aged mice. When modeled in primary hippocampal NSPC cultures, GC oscillations control cell cycle progression and induce specific genome-wide DNA methylation profiles. GC oscillations induced lasting changes in the methylation state of a group of gene promoters associated with cell cycle regulation and the canonical Wnt signaling pathway. Finally, in a mouse model of accelerated aging, we show that disruption of GC oscillations induces lasting changes in dendritic complexity, spine numbers and morphology of newborn granule neurons. Together, these results indicate that GC oscillations preserve a population of GR-expressing NSPC during aging, preventing their activation possibly by epigenetic programming through methylation of specific gene promoters. Our observations suggest a novel mechanism mediated by GC that controls NSPC proliferation and preserves a dormant NSPC pool, possibly contributing to a neuroplasticity reserve in the aging brain.
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Affiliation(s)
- M Schouten
- Neuroscience Collaboration, Swammerdam Institute for Life Sciences, Faculty of Sciences, Amsterdam Neuroscience, University of Amsterdam, Amsterdam, The Netherlands
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam Neuroscience, Amsterdam, The Netherlands
| | - P Bielefeld
- Neuroscience Collaboration, Swammerdam Institute for Life Sciences, Faculty of Sciences, Amsterdam Neuroscience, University of Amsterdam, Amsterdam, The Netherlands
| | - L Garcia-Corzo
- Biomedicine Institute of Valencia (IBV), Consejo Superior de Investigaciones Científicas (CSIC), Valencia, Spain
| | - E M J Passchier
- Neuroscience Collaboration, Swammerdam Institute for Life Sciences, Faculty of Sciences, Amsterdam Neuroscience, University of Amsterdam, Amsterdam, The Netherlands
| | - S Gradari
- Cajal Institute, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - T Jungenitz
- Institute of Clinical Neuroanatomy, Neuroscience Center, Goethe-University Frankfurt, Frankfurt am Main, Germany
| | - M Pons-Espinal
- Neurobiology of miRNA Lab, Neuroscience and Brain Technologies Department, Istituto Italiano di Tecnologia, Genoa, Italy
| | - E Gebara
- Center for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | | | - P J Lucassen
- Neuroscience Collaboration, Swammerdam Institute for Life Sciences, Faculty of Sciences, Amsterdam Neuroscience, University of Amsterdam, Amsterdam, The Netherlands
| | - H E De Vries
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, Amsterdam Neuroscience, Amsterdam, The Netherlands
| | - J L Trejo
- Cajal Institute, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - S W Schwarzacher
- Institute of Clinical Neuroanatomy, Neuroscience Center, Goethe-University Frankfurt, Frankfurt am Main, Germany
| | - D De Pietri Tonelli
- Neurobiology of miRNA Lab, Neuroscience and Brain Technologies Department, Istituto Italiano di Tecnologia, Genoa, Italy
| | - N Toni
- Center for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - H Mira
- Biomedicine Institute of Valencia (IBV), Consejo Superior de Investigaciones Científicas (CSIC), Valencia, Spain
| | - J M Encinas
- Achucarro Basque Center for Neuroscience, Leioa, Spain
- Ikerbasque, The Basque Foundation for Science, Bilbao, Spain
- University of the Basque Country (UPV/EHU), Leioa, Spain
| | - C P Fitzsimons
- Neuroscience Collaboration, Swammerdam Institute for Life Sciences, Faculty of Sciences, Amsterdam Neuroscience, University of Amsterdam, Amsterdam, The Netherlands.
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Schouten M, Nossent EJ, Visser H, de Vocht J, van Jaarsveld BC. An immunocompromised woman with a lung tumour. Neth J Med 2015; 73:139-141. [PMID: 25852116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Affiliation(s)
- M Schouten
- Departments of Nephrology, VU Medical Center, Amsterdam, the Netherlands
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12
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Tonneijck L, Schouten M, Weijmer MC, Siegert CEH. A male with extensive renal vein thrombosis. Neth J Med 2013; 71:480-484. [PMID: 24218423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Affiliation(s)
- L Tonneijck
- Department of Nephrology, St. Lucas Andreas Hospital, Amsterdam, the Netherlands
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13
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Tonneijck L, Fuijkschot WW, Schouten M, Siegert CEH. A 76-year-old male with a blue toe and livedo reticularis. Neth J Med 2013; 71:257-261. [PMID: 23799313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Affiliation(s)
- L Tonneijck
- Department of Nephrology, St. Lucas Andreas Hospital, Amsterdam, The Netherlands.
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Schouten M, van 't Veer C, van der Poll T, Levi M. Effect of the factor V Leiden mutation on the incidence and outcome of severe infection and sepsis. Neth J Med 2012; 70:306-310. [PMID: 22961823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Activation of coagulation frequently occurs in severe infection and sepsis and may contribute to the development of multiple organ dysfunction. Factor V Leiden is a relatively common mutation resulting in a mild prohaemostatic state and consequently with an increased tendency to develop thrombosis. Hypothetically, patients with factor V Leiden may suffer from more severe coagulopathy in case of severe infection or sepsis. Aggravation of the procoagulant state in sepsis may subsequently result in more severe organ dysfunction and an increased risk of death. Here we discuss the experimental and clinical evidence regarding the relationship between the presence of a factor V Leiden mutation and the incidence and outcome of sepsis.
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Affiliation(s)
- M Schouten
- Department of Medicine, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
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15
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Kanick SC, Gamm UA, Schouten M, Sterenborg HJCM, Robinson DJ, Amelink A. Measurement of the reduced scattering coefficient of turbid media using single fiber reflectance spectroscopy: fiber diameter and phase function dependence. Biomed Opt Express 2011; 2:1687-702. [PMID: 21698029 PMCID: PMC3114234 DOI: 10.1364/boe.2.001687] [Citation(s) in RCA: 10] [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] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Revised: 05/19/2011] [Accepted: 05/19/2011] [Indexed: 05/03/2023]
Abstract
This paper presents a relationship between the intensity collected by a single fiber reflectance device (R(SF)) and the fiber diameter (d(fib)) and the reduced scattering coefficient ( μs') and phase function (p(θ)) of a turbid medium. Monte Carlo simulations are used to identify and model a relationship between R(SF) and dimensionless scattering ( μs'dfib). For μs'dfib > 10 we find that R(SF) is insensitive to p(θ). A solid optical phantom is constructed with μs' ≈ 220 mm-1 and is used to convert R(SF) of any turbid medium to an absolute scale. This calibrated technique provides accurate estimates of μs' over a wide range ([0.05 - 8] mm(-1)) for a range of d(fib) ([0.2 - 1] mm).
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Affiliation(s)
- S. C. Kanick
- Center for Optical Diagnostics and Therapy, Department of Radiation Oncology, Erasmus Medical Center, PO Box 2040, 3000 CA Rotterdam, The
Netherlands
| | - U. A. Gamm
- Center for Optical Diagnostics and Therapy, Department of Radiation Oncology, Erasmus Medical Center, PO Box 2040, 3000 CA Rotterdam, The
Netherlands
| | - M. Schouten
- Center for Optical Diagnostics and Therapy, Department of Radiation Oncology, Erasmus Medical Center, PO Box 2040, 3000 CA Rotterdam, The
Netherlands
| | - H. J. C. M. Sterenborg
- Center for Optical Diagnostics and Therapy, Department of Radiation Oncology, Erasmus Medical Center, PO Box 2040, 3000 CA Rotterdam, The
Netherlands
| | - D. J. Robinson
- Center for Optical Diagnostics and Therapy, Department of Radiation Oncology, Erasmus Medical Center, PO Box 2040, 3000 CA Rotterdam, The
Netherlands
| | - A. Amelink
- Center for Optical Diagnostics and Therapy, Department of Radiation Oncology, Erasmus Medical Center, PO Box 2040, 3000 CA Rotterdam, The
Netherlands
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16
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Schouten M, van't Veer C, Levi M, Esmon CT, van der Poll T. Endogenous protein C inhibits activation of coagulation and transiently lowers bacterial outgrowth in murine Escherichia coli peritonitis. J Thromb Haemost 2011; 9:1072-5. [PMID: 21251201 DOI: 10.1111/j.1538-7836.2011.04199.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Mascini E, Schouten M, Cornelissen P, Waegemaekers T. P05.04 Cluster of two patients with community-acquired MRSA arthritis in the eastern part of the Netherlands traced to a general practitioner. J Hosp Infect 2010. [DOI: 10.1016/s0195-6701(10)60055-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Schouten M, van der Sluijs KF, Roelofs JJTH, Levi M, Van't Veer C, van der Poll T. Factor V Leiden mutation does not affect coagulopathy or outcome in lethal H1N1 influenza. Eur Respir J 2010; 36:1346-54. [PMID: 20413539 DOI: 10.1183/09031936.00204909] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Influenza A is a major cause of mortality. Knowledge on coagulation activation in influenza infection is limited. The factor V Leiden (FVL) mutation is possibly subject to positive selection pressure. It is unknown whether this mutation impacts on the outcome of severe influenza. In the present study, the effect of lethal influenza on pulmonary and systemic coagulation activation and whether or not FVL mutation alters coagulation activation in and the course of lethal influenza, was determined. Wild-type mice, and mice heterozygous or homozygous for FVL were infected intranasally with a lethal dose of H1N1 (haemagglutinin 1 and neuraminidase 1) influenza A. Mice were sacrificed after 48 or 96 h for determination of coagulation activation, histopathology, pulmonary inflammatory parameters and viral load, or were observed in a survival study. Extensive local and systemic coagulation activation during lethal influenza was demonstrated by increased lung and plasma levels of thrombin-antithrombin complexes and fibrin degradation products, and by pulmonary fibrin deposition. FVL mutation did not influence the procoagulant response, lung histopathology or survival. FVL mice demonstrated elevated viral loads 48 h after infection. In conclusion, coagulation is activated locally and systemically during lethal murine influenza A infection. The FVL mutation does not influence coagulation activation, lung inflammation or survival in lethal influenza A.
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Affiliation(s)
- M Schouten
- Center for Experimental and Molecular Medicine, University of Amsterdam, Amsterdam, The Netherlands.
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19
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Schouten M. Pericarditis caused by spatype t011 MRSA in a butcher; an occupational hazard. Int J Infect Dis 2010. [DOI: 10.1016/j.ijid.2010.02.468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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20
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Schouten M, VAN DE Pol MA, Levi M, VAN DER Poll T, VAN DER Zee JS. Early activation of coagulation after allergen challenge in patients with allergic asthma. J Thromb Haemost 2009; 7:1592-4. [PMID: 19552679 DOI: 10.1111/j.1538-7836.2009.03523.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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21
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Hofstra JJ, Schouten M, Levi M. Thrombophilia as a Risk Factor for Outcome in Sepsis. Intensive Care Med 2009. [DOI: 10.1007/978-0-387-77383-4_66] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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22
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Schouten M, van't Veer C, Levi M, Esmon C, van der Poll T. ENDOGENOUS PROTEIN C INHIBITS PULMONARY COAGULATION BUT FACILITATES BACTERIAL DISSEMINATION IN THE EARLY PHASE OF PNEUMOCOCCAL PNEUMONIA IN MICE. J Thromb Haemost 2007. [DOI: 10.1111/j.1538-7836.2007.tb01836.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Choi G, Vlaar APJ, Schouten M, Van't Veer C, van der Poll T, Levi M, Schultz MJ. Natural anticoagulants limit lipopolysaccharide-induced pulmonary coagulation but not inflammation. Eur Respir J 2007; 30:423-8. [PMID: 17537762 DOI: 10.1183/09031936.00165606] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Pulmonary coagulopathy and hyperinflammation may contribute to an adverse outcome in sepsis. The present study determines the effects of natural inhibitors of coagulation on bronchoalveolar haemostasis and inflammation in a rat model of endotoxaemia. Male Sprague-Dawley rats were randomised to treatment with normal saline, recombinant human activated protein C (APC), plasma-derived antithrombin (AT), recombinant human tissue factor pathway inhibitor (TFPI), heparin or recombinant tissue plasminogen activator (tPA). Rats were intravenously injected with lipopolysaccharide (LPS), which induced a systemic inflammatory response and pulmonary inflammation. Blood and bronchoalveolar lavage were obtained at 4 and 16 h after LPS injection, and markers of coagulation and inflammation were measured. LPS injection caused an increase in the levels of thrombin-AT complexes, whereas plasminogen activator activity was attenuated, both systemically and within the bronchoalveolar compartment. Administration of APC, AT and TFPI significantly limited LPS-induced generation of thrombin-AT complexes in the lungs, and tPA stimulated pulmonary fibrinolytic activity. However, none of the agents had significant effects on the production of pulmonary cytokines, chemokines, neutrophil influx and myeloperoxidase activity. Natural inhibitors of coagulation prevent bronchoalveolar activation of coagulation, but do not induce major alterations of the pulmonary inflammatory response in rat endotoxaemia.
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Affiliation(s)
- G Choi
- Department of Intensive Care Medicine, Academic Medical Centre, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands.
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24
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Schouten M, Otter J, van Zanten A, Houmes-Zielman G, Nohlmans-Paulssen M. P1692 Environmental decontamination of an intensive care unit to control outbreaks of multidrug-resistant Gram-negative rods using hydrogen peroxide vapour. Int J Antimicrob Agents 2007. [DOI: 10.1016/s0924-8579(07)71531-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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25
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Murray B, Chwyl B, Campbell K, Connors S, Dundas G, Eberle S, Fawcett S, Field C, Richardson S, Sandahl D, Schouten M, Yakimovich C. Po-Thur Eve General-38: The Virtual Radiotherapy Department. Med Phys 2006. [DOI: 10.1118/1.2244665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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26
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Lazeron RHC, Boringa JB, Schouten M, Uitdehaag BMJ, Bergers E, Lindeboom J, Eikelenboom MI, Scheltens PH, Barkhof F, Polman CH. Brain atrophy and lesion load as explaining parameters for cognitive impairment in multiple sclerosis. Mult Scler 2005; 11:524-31. [PMID: 16193889 DOI: 10.1191/1352458505ms1201oa] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Multiple sclerosis (MS) is a multifocal demyelinating disease of the central nervous system, with lesions widespread through the brain and spinal cord. An important manifestation is cognitive impairment, which, though difficult to measure, may have a major social impact. To better understand the relationship between structural tissue damage and cognitive impairment, we examined the extent and spatial distribution of brain lesions, as measured by magnetic resonance imaging (MRI), in relation to abnormal cognitive performance as measured by the Brief Repeatable Battery (BRB) in 82 MS patients. Possible confounders, like fatigue, pain and depression were also assessed. Brain MR image analysis included hyperintense T2 and hypointense T1 lesion load in the whole brain and the four lobes separately, as well as whole brain volume measurements. Cognitive impairment (defined as more than two abnormal tests) was found in 67% of the patients. Moderately strong correlations were found between the subtests of the BRB and the lesion loads in the brain regions hypothesized to be associated with that cognitive test, although these correlations were in general not much stronger than those between the subtests and the overall lesion load (due to strong interrelationships). The Spatial Recall Test correlated best with parietal lesion load; the Symbol Digit Modalities Test, the Paced Auditory Serial Addition Task (PASAT) and the Word List Generation best with frontal, parietal and temporal lesion load; while the Verbal List Generation Test Index correlated only with atrophy. Atrophy and lesion load were the main factors determining the test scores, explaining 10-25% of the variance in the test results, and were more important than fatigue, pain and depression; only depression had a minor, but significant, additional effect on the PASAT. In conclusion, cognitive impairment in MS is moderately dependent on amount (and distribution) of structural brain damage, especially in the more physically impaired patients group.
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Affiliation(s)
- R H C Lazeron
- MS Center, Vrije Universiteit Medical Center, Amsterdam, The Netherlands.
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27
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de Jong AEE, Bremer M, Schouten M, Tuinebreijer WE, Faber AW. Reliability and validity of the pain observation scale for young children and the visual analogue scale in children with burns. Burns 2005; 31:198-204. [PMID: 15683693 DOI: 10.1016/j.burns.2004.09.013] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/20/2004] [Indexed: 11/27/2022]
Abstract
The aim of this study was to assess if the pain observation scale for young children (POCIS) and the visual analogue scale (VAS) are reliable and valid instruments to measure procedural and background pain in burned children aged 0-4 years. Burn care nurses (n=73) rated pain from 24 fragments of videotaped children during wound care procedures and during periods of rest using the POCIS and the VAS. Intraclass correlations were used to assess inter-rater and intra-rater reliability for the POCIS and the VAS. Internal consistency for POCIS was assessed by Cronbach's alpha. The POCIS has shown poor to moderate inter-rater reliability, moderate to good intra-rater reliability and an acceptable internal consistency. The VAS turned out to have poor inter-rater reliability and poor to moderate intra-rater reliability. Due to poor results of inter-rater reliability in both scales, construct validation is left undone until more acceptable results are obtained. Factors explaining the results are the large number of raters, the manner they were trained and a lack of variation between pain classes in video fragments. Although not all results were satisfying, an easy to use scale as POCIS has promising qualities and deserves further reliability research.
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Affiliation(s)
- A E E de Jong
- Burn Centre, Red Cross Hospital, Vondellaan 13, 1942 LE Beverwijk, The Netherlands.
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28
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Snijders F, de Boer JB, Steenbergen B, Schouten M, Danner SA, van Dam FS. Impact of diarrhoea and faecal incontinence on the daily life of HIV-infected patients. AIDS Care 1998; 10:629-37. [PMID: 9828959 DOI: 10.1080/09540129848488] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Diarrhoea in HIV-1 infected persons is an important clinical problem. To improve care and counselling, information about the way, and the extent to which, diarrhoea influences the daily life of these patients can be useful. A cross-sectional descriptive study was performed at the HIV infection clinic of three major hospitals in Amsterdam. A diary, the Coates card system (to determine the relative severity of the symptoms) and an interview were used as outcome measures. Sixty-two patients participated and were classified into four groups: group 1 (minor diarrhoea, n = 26), group 2 (mild diarrhoea, n = 18), group 3 (moderate diarrhoea, n = 7) and group 4 (severe diarrhoea, n = 11). Diarrhoea was considered a very severe symptom in groups 2, 3 and 4. Even mild diarrhoea may have a debilitating impact on the day-to-day life of HIV-infected patients. Faecal incontinence occurs frequently. Patients can worry about their diarrhoea because of lack of information. Patients who do not have diarrhoea according to current definitions of it, consider diarrhoea to be equally problematic as those with (moderate) diarrhoea. More information on prognosis and practical solutions for patients are recommended.
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Affiliation(s)
- F Snijders
- Division of Infectious Diseases, Tropical Medicine and AIDS, Academic Medical Center, University of Amsterdam, The Netherlands
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29
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van der Hoeven FA, Schouten M, de Boer P. Embryo survival in pseudopregnant and in pregnant but genetically semi-sterile recipients after nonsurgical embryo transfer in the mouse. Theriogenology 1991; 36:463-75. [PMID: 16727018 DOI: 10.1016/0093-691x(91)90475-s] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/1990] [Accepted: 07/19/1991] [Indexed: 11/24/2022]
Abstract
A new nonsurgical embryo transfer technique was used in the mouse that yielded survival rates of between 40 and 70% depending on embryo stage and, possibly, on the degree of synchrony between the embryo and recipient. Three variables were tested using this embryo transfer technique: a) pseudopregnant recipients vs pregnant but genetically semi-sterile recipients, b) embryos resulting from superovulation vs embryos from natural ovulation, and c) 12-hour vs 24-hour asynchrony between donors and recipients. None of these variables significantly affected the pregnancy rate or the percentage of transferred embryos developing to term. The pregnancy rates were between 77 and 90% in 6 experimental groups of 8 to 13 females. Survival rates were between 41 and 63% when all recipients were considered and between 53 and 68% when only the pregnant recipients were included. The embryo transfer procedure influenced litter size composition of the endogenous conceptuses of the semi-sterile recipients. Too many females were devoid of these. Recipients of expanded blastocysts had significantly better transfer results than recipients that also received morulae and early blastocysts. It was concluded that the transfer success rates were influenced by the recipients and possibly by their preparation for transfer.
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Affiliation(s)
- F A van der Hoeven
- Department of Genetics, Wageningen Agricultural University, Dreijenlaan 2, 6703 HA Wageningen, The Netherlands
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30
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Schouten M, Kerkhof A. [Relationship with persons who attempt suicide and with their relatives. A course for intensive care nurses]. TVZ 1991:130-3. [PMID: 1902691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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31
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Schouten M, Dorrepaal J, Stassen W, Vlak W, Mortensen K. Thermal stability of polystyrene-b-poly(ethylene/propylene) diblock copolymer micelles in paraffinic solvents. POLYMER 1989. [DOI: 10.1016/0032-3861(89)90291-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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32
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Aguilar-Benitez M, Allison WWM, Bailly JL, Baland JF, Banerjee S, Bartl W, Begalli M, Belliere P, Bettini A, Billy L, Bizarri R, Borreani G, Briand H, Brun R, Bugg WM, Capua E, Caso C, Colino N, Castelli E, Checchia P, Chliapnikov P, Colwill S, Contri R, Crennel D, Cresti M, De-Angelis A, Defoix C, Dimarco R, Dolbeau J, Dumarchez J, Epp B, Falciano S, Fernandez C, Fisher C, Fisyak Y, Fontanelli F, Fry JR, Ganguli S, Garbellini L, Gasparini U, Gentile S, Goshaw A, Grard F, Gurtu A, Hamatsu R, Handler T, Hart EL, Haupt L, Hellman S, Hernandez JJ, Herve A, Holmgren SO, Houlden MA, Hrubec J, Hughes P, Huss D, Iga Y, Iori M, Jegham E, Johanson E, Kesteman J, Kistenev E, Kita I, Kitamura S, Kniazev V, Ladron de Guevara P, Laloum M, Lemonne J, Leutz H, Lyons L, MacDermott M, Malhotra PK, Marchetto F, Marel G, Marzano F, Mason P, Mazzucato M, Michalon A, Michalon-Mentzer ME, Moa T, Monge R, Montanet L, Neuhofer G, Nguyen HK, Nilsson S, Nowak H, Oshima N, Otter G, Patel GD, Pernicka M, Pilette P, Pinori C, Piredda G, Plano R, Poppleton A, Poropat P, Powell B, Ransone G, Reucroft S, Richardson J, Rinaudo G, Roberts K, Rohringer H, Schouten M, Schulte R, Sellden B, Sessa M, Shankar K, Squarcia S, Stamer P, Stopchenko V, Struczinski W, Subramanian A, Touboul MC, Trevisan U, Troncon C, Tsurugai T, Uvarov V, Ventura L, Vilain P, Vlasov E, Voltolini C, Vonck B, Wickens J, Willmott C, Wright P, Yamagata T, Yarba V, Zanello L, Zotto PL, Zumerle G. Charm hadron properties in 360 GeV/c ?? p-interactions. ACTA ACUST UNITED AC 1986. [DOI: 10.1007/bf01551071] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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33
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Brick D, Rudnicka H, Shapiro AM, Widgoff M, Ansorge RE, Neale WW, Ward DR, Whyman BM, Burnstein RA, Rubin HA, Alyea ED, Bachman L, Chien CY, Lucas P, Pevsner A, Bober JT, Frank T, Hafen ES, Haridas P, Huang D, Hulsizer RI, Kistiakowsky V, Lutz P, Oh SH, Pless IA, Stoughton TB, Suchorebrow V, Tether S, Trepagnier PC, von Randow M, Wu Y, Yamamoto RK, Grard F, Hanton J, Henri V, Herquet P, Lesceux JM, Windmolders R, DeBock H, Crijns F, Kittel W, Metzger W, Pols C, Schouten M, de Walle RV, Cohn HO, Carminati F, Dolfini R, Ratti S, DiMarco R, Jacques PF, Kalelkar M, Plano RJ, Stamer P, Watts TL, Brucker EB, Koller EL, Taylor S, Dado S, Goldberg J, Alexander G, Benary O, Grunhaus J, Heifetz R, Levy A, Brau JE, Bugg WM, Condo GT, Handler T, Hart EL, Rogers AH, Eisenberg Y, Karshon U, Shapira A, Ludlam T, Steiner R, Taft H. Search for long-lived charge +2 hadrons. Int J Clin Exp Med 1984. [DOI: 10.1103/physrevd.30.1134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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34
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Brick D, Rudnicka H, Shapiro AM, Widgoff M, Ansorge RE, Carter JR, Neale WW, Rushbrooke JG, Ward DR, Whyman BM, Burnstein RA, Rubin HA, Cooper JW, Plumer RL, Sard RD, Tortora JO, Alyea ED, Bachman L, Chien CY, Pevsner A, Brau JE, Hafen ES, Hochman D, Hulsizer RI, Kistiakowsky V, Lutz P, Napier A, Pless IA, Silverman JP, Trepagnier PC, Yamamoto RK, Grard F, Hanton J, Henri V, Herquet P, Lesceux JM, Windmolders R, Crijns F, deBock H, Kittel W, Metzger W, Pols C, Schouten M, Van de Walle R, Cohn HO, Bressi G, Calligarich E, Carminati F, Castoldi C, Dolfini R, Ratti S, DiMarco R, Jacques PF, Kalelkar M, Plano RJ, Stamer P, Watts TL, Brucker EB, Koller EL, Taylor S, Berny L, Dado S, Goldberg J, Toaff S, Alexander G, Benary O, Grunhaus J, Levy A, Bugg WM, Condo GT, Handler T, Hart EL, Eisenberg Y, Karshon U, Ronat EE, Shapira A, Yaari R, Yekutieli G, Ljung DA, Ludlam TW, Taft HD. Inclusive strange-resonance production inpp,π+p, andK+pinteractions at 147 GeV/c. Int J Clin Exp Med 1982. [DOI: 10.1103/physrevd.25.2248] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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35
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McConville BE, Kennedy EH, Schouten M. An evaluation of the patellar tendon-bearing prosthesis. Int Surg 1967; 47:377-81. [PMID: 6033914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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