8 research outputs found

    Herstel van een brongebied in natuurreservaat het Springendal; kolonisatie van nieuwe bronnen door macrofauna

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    Dit rapport beschrijft de ontwikkeling van een nieuw brongebied in natuurreservaat het Springendal in Oost-Twente. Dit gebied (een voormalige maisakker) is in 1996 aangekocht door Staatsbosheer en in 1998 heringericht. In het van oorsprong natte gebied is een aantal bronnen ontstaan. Op drie plekken, een bron met de bronbeek en een poel, is gedurende 4 jaar de macrofauna gemonitord en zijn milieuvariabelen in het water gemeten. Deze gegevens zijn geanalyseerd en het kolonisatieproces is beschreven. Dit rapport evalueert de ontwikkeling van het gebied, de kolonisatie door macrofauna en het succes van de herinrichting

    The Meta VCI Map consortium for meta-analyses on strategic lesion locations for vascular cognitive impairment using lesion-symptom mapping: design and multicenter pilot study

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    Introduction: The Meta VCI Map consortium performs meta-analyses on strategic lesion locations for vascular cognitive impairment using lesion-symptom mapping. Integration of data from different cohorts will increase sample sizes, to improve brain lesion coverage and support comprehensive lesion-symptom mapping studies. Methods: Cohorts with available imaging on white matter hyperintensities or infarcts and cognitive testing were invited. We performed a pilot study to test the feasibility of multicenter data processing and analysis and determine the benefits to lesion coverage. Results: Forty-seven groups have joined Meta VCI Map (stroke n = 7800 patients; memory clinic n = 4900; population-based n = 14,400). The pilot study (six ischemic stroke cohorts, n = 878) demonstrated feasibility of multicenter data integration (computed tomography/magnetic resonance imaging) and achieved marked improvement of lesion coverage. Discussion: Meta VCI Map will provide new insights into the relevance of vascular lesion location for cognitive dysfunction. After the successful pilot study, further projects are being prepared. Other investigators are welcome to join

    Herstel van een brongebied in natuurreservaat het Springendal; kolonisatie van nieuwe bronnen door macrofauna

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    Dit rapport beschrijft de ontwikkeling van een nieuw brongebied in natuurreservaat het Springendal in Oost-Twente. Dit gebied (een voormalige maisakker) is in 1996 aangekocht door Staatsbosheer en in 1998 heringericht. In het van oorsprong natte gebied is een aantal bronnen ontstaan. Op drie plekken, een bron met de bronbeek en een poel, is gedurende 4 jaar de macrofauna gemonitord en zijn milieuvariabelen in het water gemeten. Deze gegevens zijn geanalyseerd en het kolonisatieproces is beschreven. Dit rapport evalueert de ontwikkeling van het gebied, de kolonisatie door macrofauna en het succes van de herinrichting

    Bespiegelingen over straffen

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    Contains articles on the status of the death penalty in the western society, expulsion from office or profession, transgressive sexual contact and sexual abuse, crime and punishment in a populist context

    A quantitative method for microstructural analysis of myelinated axons in the injured rodent brain

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    textabstractMRI studies (e.g. using diffusion tensor imaging) revealed that injury to white matter tracts, as observed in for instance perinatal white matter injury and multiple sclerosis, leads to compromised microstructure of myelinated axonal tracts. Alterations in white matter microstructure are also present in a wide range of neurological disorders including autism-spectrum disorders, schizophrenia and ADHD. Whereas currently myelin quantity measures are often used in translational animal models of white matter disease, it can be an important valuable addition to study the microstructural organization of myelination patterns in greater detail. Here, we describe methods to extensively study the microstructure of cortical myelination by immunostaining for myelin. To validate these methods, we carefully analyzed the organization of myelinated axons running from the external capsule towards the outer layers of the cortex in three rodent models of neonatal brain injury and in an adult stroke model, that have all been associated with myelination impairments. This unique, relatively easy and sensitive methodology can be applied to study subtle differences in myelination patterns in animal models in which aberrations in myelination integrity are suspected. Importantly, the described methods can be applied to determine efficacy of novel experimental treatments on microstructural organization of cortical myelination

    Feasibility and safety of intranasally administered mesenchymal stromal cells after perinatal arterial ischaemic stroke in the Netherlands (PASSIoN): a first-in-human, open-label intervention study

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    Background: Perinatal arterial ischaemic stroke (PAIS) is an important cause of neurodevelopmental disabilities. In this first-in-human study, we aimed to assess the feasibility and safety of intranasally delivered bone marrow-derived allogeneic mesenchymal stromal cells (MSCs) to treat PAIS in neonates. Methods: In this open-label intervention study in collaboration with all neonatal intensive care units in the Netherlands, we included neonates born at full term (>= 36 weeks of gestation) with MRI-confirmed PAIS in the middle cerebral artery region. All eligible patients were transferred to the neonatal intensive care unit of the Wilhelmina Children's Hospital. Neonates received one dose of 45-50 x 10(6) bone-marrow derived MSCs intranasally within 7 days of presenting signs of PAIS. The primary endpoints were acute and subacute safety outcomes, including vital signs, blood markers, and the occurrence of toxicity, adverse events, and serious adverse events. The occurrence of unexpected cerebral abnormalities by a repeat MRI at 3 months of age was a secondary endpoint. As part of standard clinical follow-up at Wilhelmina Children's Hospital, we assessed corticospinal tract development on MRI and performed motor assessments at 4 months of age. This study is registered with ClinicalTrials.gov, NCT03356821. Findings: Between Feb 11, 2020, and April 29, 2021, ten neonates were enrolled in the study. Intranasal administration of MSCs was well tolerated in all ten neonates. No serious adverse events were observed. One adverse event was seen: a mild transient fever of 38 degrees C without the need for clinical intervention. Blood inflammation markers (C-reactive protein, procalcitonin, and leukocyte count) were not significantly different pre-administration versus postadministration and, although thrombocyte levels increased (p=0.011), all were within the physiological range. Followup MRI scans did not show unexpected structural cerebral abnormalities. All ten patients had initial pre-Wallerian changes in the corticospinal tracts, but only four (40%) patients showed asymmetrical corticospinal tracts at follow-up MRI. Abnormal early motor assessment was found in three (30%) infants. Interpretation: This first-in-human study demonstrates that intranasal bone marrow-derived MSC administration in neonates after PAIS is feasible and no serious adverse events were observed in patients followed up until 3 months of age. Future large-scale placebo-controlled studies are needed to determine the therapeutic effect of intranasal MSCs for PAIS. Copyright (C) 2022 Published by Elsevier Ltd. All rights reserved.</p
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