23,476 results match your criteria: " The Netherlands; Amsterdam Reproduction and Development research Institute[Affiliation]"

Detecting Colorectal Neoplasia Using Specific Fecal Fluorogenic Protease-Sensitive Substrates: A Pilot Study.

Anal Chem

December 2024

Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University Amsterdam, Gustav Mahlerlaan 3004, 1081 LA Amsterdam, The Netherlands.

Background: identification and removal of advanced adenomas (AA) reduce colorectal cancer (CRC) incidence and potentially mortality. CRC screening often uses fecal immunochemical testing to select high-risk individuals for colonoscopy, despite its low sensitivity for AA and relatively high false-positivity rate. Previous studies have linked proteases to CRC development through their ability to facilitate angiogenesis and immunoregulation.

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Background: Patients with kidney failure undergoing dialysis often suffer from anemia. Iron deficiency, along with a shortage in erythropoietin, is a common cause. Peritoneal dialysis (PD) patients may have a different iron metabolism compared to hemodialysis (HD) patients.

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Large-scale brainstem neuroimaging and genetic analyses provide new insights into the neuronal mechanisms of hypertension.

HGG Adv

January 2025

Norwegian Centre for Mental Disorders Research (NORMENT), Division of Mental Health and Addiction, Oslo University Hospital and University of Oslo, 0424 Oslo, Norway; Section for Precision Psychiatry, Division of Mental Health and Addiction, Oslo University Hospital, 0424 Oslo, Norway; Center for Precision Psychiatry, Division of Mental Health and Addiction, Institute of Clinical Medicine, University of Oslo, 0424 Oslo, Norway.

While brainstem regions are central regulators of blood pressure, the neuronal mechanisms underlying their role in hypertension remain poorly understood. Here, we investigated the structural and genetic relationships between global and regional brainstem volumes and blood pressure. We used magnetic resonance imaging data from n = 32,666 UK Biobank participants, and assessed the association of volumes of the whole brainstem and its main regions with blood pressure.

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Cancer immunotherapies with antibodies blocking immune checkpoint molecules are clinically active across multiple cancer entities and have markedly improved cancer treatment. Yet, response rates are still limited, and tumour progression commonly occurs. Soluble and cell-bound factors in the tumour microenvironment negatively affect cancer immunity.

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Introduction: To evaluate the long-term effect of corneal transplantation on mental health outcomes and to assess potential predictors of these outcomes.

Methods: For this multicentre prospective cohort study, patients awaiting corneal transplantation were recruited from 11 (academic) hospitals and eye clinics in the Netherlands. Participants (n = 238) completed the Centre for Epidemiological Studies Depression scale (CES-D), the Hospital Anxiety and Depression Scale-Anxiety subscale (HADS-A) and the Dutch ICF Activity Inventory Emotional Health subscale (DAI-EH) and Fatigue subscale (DAI-F) 1 month prior and 3, 6, 12 and 24 months after corneal transplantation.

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Biosynthesis of Antimicrobial Ornithine-Containing Lacticin 481 Analogues by Use of a Combinatorial Biosynthetic Pathway in .

ACS Synth Biol

December 2024

Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen 9747 AG, The Netherlands.

Lacticin 481, a ribosomally synthesized and post-translationally modified peptide (RiPP), exhibits antimicrobial activity, for which its characteristic lanthionine and methyllanthionine ring structures are essential. The post-translational introduction of (methyl)lanthionines in lacticin 481 is catalyzed by the enzyme LctM. In addition to macrocycle formation, various other post-translational modifications can enhance and modulate the chemical and functional diversity of antimicrobial peptides.

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Urea hydrogen-bond donor strengths: bigger is not always better.

Phys Chem Chem Phys

December 2024

Department of Chemistry and Pharmaceutical Sciences, Amsterdam Institute of Molecular and Life Sciences (AIMMS), Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands.

The hydrogen-bond donor strength of ureas, widely used in hydrogen-bond donor catalysis, molecular recognition, and self-assembly, can be enhanced by increasing the size of the chalcogen X in the CX bond from O to S to Se and by introducing more electron-withdrawing substituents because both modifications increase the positive charge on the NH groups which become better hydrogen-bond donors. However, in 1,3-diaryl X-ureas, a steric mechanism disrupts the positive additivity of these two tuning factors, as revealed by our quantum-chemical analyses. This leads to an enhanced hydrogen-bond donor strength, despite a lower NH acidity, for 1,3-diaryl substituted O-ureas compared to the S- and Se-urea analogs.

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Inositol 1,4,5-Trisphosphate Receptor 1 Gain-of-Function Increases the Risk for Cardiac Arrhythmias in Mice and Humans.

Circulation

December 2024

Department of Physiology and Pharmacology, Libin Cardiovascular Institute, University of Calgary, Canada (B.S., M. Ni, Y.L., Z.S., H.W., H.-L.Z., J.W., D.B., S.C., W.G., J.Y., S.T., J.P.E., R.W., S.R.W.C.).

Article Synopsis
  • * Researchers identified 21 human ITPR1 GOF variants and created a mouse model with one of these variants (ITPR1-W1457G), which was found to be prone to stress-induced ventricular arrhythmias.
  • * Both mouse models and human data suggest that ITPR1 GOF variants increase Ca handling abnormalities and arrhythmia risk, with 7 rare ITPR1 variants in a human database showing similar GOF behavior linked to cardiac
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Microplastic analysis in soils: A comparative assessment.

Ecotoxicol Environ Saf

December 2024

Institute of Crop Science and Resource Conservation (INRES), Soil Science and Soil Ecology, University of Bonn, Nussallee 13, Bonn 53115, Germany; Agrosphere Institute (IBG-3), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Str, Jülich 52425, Germany.

Microplastic (MiP) contamination poses environmental risks, but harmonizing data from different quantification methods and sample matrices remains challenging. We compared analytical protocols for MiP quantification in soil, consisting of Digital, Fluorescence, Fourier-transform infrared (FTIR), and Raman Microscopy as well as quantitative Pyrolysis-Gas Chromatography-Mass Spectroscopy (Py-GC-MS) and 1-proton nuclear magnetic resonance (H NMR) spectroscopy as detection techniques. Each technique was coupled with a specific extraction procedure and evaluated for three soils with different textures and organic carbon contents, amended with eight types of large MiPs (0.

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Chemical and functional inheritance of carbon quantum dots hydrothermally-derived from chitosan.

J Colloid Interface Sci

March 2025

University of Groningen and University Medical Center Groningen, Department of Biomaterials & Biomedical Technology, Antonius Deusinglaan 1, 9713 AV Groningen, the Netherlands. Electronic address:

Article Synopsis
  • Carbon quantum dots (CQDs), due to their small size, can easily cross biological barriers, making them useful in various biomedical applications.
  • Using hydrothermal methods at 180°C, CQDs derived from chitosan and HAC-chitosan have similar elemental and molecular properties, while also generating reactive oxygen species.
  • The CQDs demonstrate strong antibacterial properties against bacteria like Staphylococcus aureus and Escherichia coli, suggesting potential uses in wound healing, food preservation, agriculture, water treatment, and personal care products.
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Aim: The early diagnosis of atherosclerotic changes to prevent ischemic events represents a clinical challenge.Prostate-specific membrane antigen (PSMA) as an established diagnostic in the field of prostate cancer also appears to detect neovascularization and inflammation in other diseases. We hypothesized that it might be also suited for detection of inflammation in atherosclerosis.

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Activated carbon adsorption is a widely used technology for the removal of per- and polyfluoroalkyl substances (PFAS). However, the rapid breakthrough of PFAS in activated carbon filters poses a challenge to meet the very low allowable PFAS concentrations in drinking water, leading to high operational costs. In this study, we conducted batch isotherm and kinetic adsorption experiments using nine different types of PFAS molecules at concentrations typically found in water sources used for drinking water production (0.

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Purpose: Optical coherence tomography (OCT)-derived measurements of the optic nerve head (ONH) from different devices are not interchangeable. This poses challenges to patient follow-up and collaborative studies. Here, we present a device-agnostic method for the extraction of OCT biomarkers using artificial intelligence.

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Arterial calcification in the heart-brain axis and cognitive performance over time.

Alzheimers Dement

December 2024

Department of Radiology and Nuclear Medicine, Erasmus MC, Rotterdam, The Netherlands.

Article Synopsis
  • - The study explored the relationship between arteriosclerosis, measured by arterial calcification in the heart-brain axis, and cognitive performance over time, using data from the Rotterdam Study with 2368 participants.
  • - Findings showed that higher levels of arterial calcification were linked to poorer initial cognitive performance and a faster decline in cognitive abilities across multiple domains, particularly influenced by calcification in the intracranial carotid artery.
  • - The results suggest that arterial calcification may drive cognitive decline through changes in blood flow before any neurovascular damage occurs, emphasizing the role of vascular health in maintaining cognitive function.
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Inappropriate Therapy and Shock Rates Between the Subcutaneous and Transvenous Implantable Cardiac Defibrillator: A Secondary Analysis of the PRAETORIAN Trial.

Circ Arrhythm Electrophysiol

December 2024

Department of Cardiology, Amsterdam UMC Location University of Amsterdam, Heart Center, Amsterdam Cardiovascular Sciences Heart failure and Arrhythmias, the Netherlands (L.R.A.O.N., S.P., L.V.A.B., T.F.B., A.-F.B.E.Q., W.v.d.S., L.S., J.A.d.V., J.G.P.T., N.R.B., J.R.d.G., K.M.K., A.d.W., A.A.M.W., R.E.K.).

Article Synopsis
  • Inappropriate therapy (IAT) is a significant issue associated with implantable cardiac defibrillator (ICD) therapy, particularly highlighted in early subcutaneous ICD (S-ICD) studies which showed high rates of inappropriate shocks (IAS).
  • The PRAETORIAN trial, an international study with 849 patients, found no major differences in IAT and IAS rates between S-ICD and transvenous ICD (TV-ICD) groups, as both groups had similar cumulative incidences.
  • Key predictors for IAT varied between the two groups, with TV-ICD patients experiencing IAT mainly from supraventricular tachycardias, while S-ICD patients faced issues from cardiac oversensing
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The classical psychedelic drug (+)-lysergic acid diethylamide (LSD) continues to attract considerable multidisciplinary interest, and over the last eight decades, many derivatives and analogs of LSD have been synthesized. One site on the ergoline scaffold of LSD that has been frequently modified is the N-position, with the N-acylated LSD derivative 1-acetyl-LSD (1A-LSD, ALD-52) being one of the earliest examples. In more recent years, several other alkylcarbonyl- and cycloalkylcarbonyl-substituted LSD derivatives have been evaluated, including several distributed as research chemicals.

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Eating rate (ER) can moderate energy intake and ER can be modified by the texture and physical properties of food. However, the magnitude of the effects is not well known. The aim of this study was to investigate how bread texture and physical properties determine ER.

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The potential inhibitory mechanism of EGCG against the Chikungunya virus targeting non-structural protein 2 through molecular dynamics simulation.

Sci Rep

November 2024

Molecular and Integrative Biosciences Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, 00014, Helsinki, Finland.

This study explores the potential of Indonesian herbal compounds against the chikungunya virus (CHIKV), which causes widespread illness without a specific cure known as chikungunya fever (CHIKF). By focusing on the nsP2 protein, crucial for the virus's replication, the research utilizes computational methods identifying inhibitor compounds with high binding affinity. These promising candidates are further analyzed through 1 µs of molecular dynamic (MD) simulation studies, aiming to find effective inhibitors to control the chikungunya spread, leveraging Indonesia's rich biodiversity for novel anti-CHIKV therapies.

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The fluorescent probe method with 8-anilino-1-naphthalenesulfonic acid ammonium salt (ANSA) and 6-propionyl-2-(,-dimethylamino) naphthalene (PRODAN) was validated to determine the effective hydrophobicity of the whey protein isolate. The focus was on charge and hydrophobic interactions due to the complexation between the proteins and probes. Using ANSA could overestimate the effective hydrophobicity of positively charged proteins.

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Interfaith Collaboration: Boundary Crossing in a Participatory Action Research Project with Health Care Chaplains in The Netherlands.

J Relig Health

November 2024

Chair Group Humanist Chaplaincy Studies for a Plural Society, University of Humanistic Studies, Kromme Nieuwegracht 29, 3512 HD, Utrecht, The Netherlands.

This article explores the challenges faced by a multifaith chaplaincy team in a Dutch health care organization when searching for a shared professional identity regarding the role of worldview and religion. Using boundary theory, we show how the diverse worldviews and the contradictory visions on their role for chaplaincy's professional identity led to misunderstandings and conflict. However, open and respectful dialogue about these differences helped clarify disagreements and identify common ground.

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Article Synopsis
  • * Researchers engineered N. oceanica using a specific strain (LP-tdTomato) to enhance ketocarotenoid production by introducing a key enzyme (CrBKT) from another alga, resulting in significant increases in carotenoid levels and a noticeable orange/red coloration in the cultures.
  • * Optimal production of canthaxanthin and ketocarotenoids was achieved at lower light intensity (150 µmol m s),
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The International Staging System for multiple myeloma recently underwent a second revision (R2-ISS) to include gain/amplification of 1q21 and account for the additive prognostic significance of multiple high-risk features. The phase 3 ICARIA-MM (isatuximab-pomalidomide-dexamethasone vs. pomalidomide-dexamethasone) and IKEMA (isatuximab-carfilzomib-dexamethasone vs.

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Article Synopsis
  • Various polymorphisms in the beta-2 adrenergic receptor (ADRB2) gene have links to cardiometabolic issues like hypertension and obesity, but the specific SNP rs12654778 hasn't been studied much, especially in Chile.
  • The study aimed to see how the rs12654778 SNP in the ADRB2 gene relates to cardiometabolic risk factors among 404 Chilean adults through analysis of their genotypes (GG, AG, AA).
  • Results showed that individuals with the AA genotype had significantly lower levels of low-density lipoprotein (LDL) cholesterol, suggesting a protective effect; this study marks a first for research on this SNP in Chile.
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On the limits of communication: The liminal positioning of older adults and processes of self-ageism and ageism.

J Aging Stud

December 2024

Department of Public Health and Primary Care, Leiden University Medical Center, Postbus 9600, 2300 RC Leiden, Netherlands; Leyden Academy on Vitality and Ageing, Rijnsburgerweg 10, 2333 AA Leiden, Netherlands. Electronic address:

Our qualitative study, consisting of in-depth semi-structured interviews with recent retirees in the Dutch city of Leiden, set out to investigate how communication, through processes of self-identification and the negotiation of social identities, relates to (self-)ageism. A letter from the city administration was used to make age identification salient in our research and prompted stories of various liminal spaces and phases that our participants experienced. Whilst liminal phases are usually considered uncertain and ambiguous, in our study we found that for older people liminality can offer a desired ambiguity that allowed them to adopt a more positive identity than 'being old', which was rejected as undesirable.

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