29,408 results match your criteria: "Freie Universitat Berlin[Affiliation]"

Large language models as an academic resource for radiologists stepping into artificial intelligence research.

Curr Probl Diagn Radiol

December 2024

Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA; Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA, USA. Electronic address:

Article Synopsis
  • * The study tested GPT-4o as a virtual advisor, providing tailored recommendations for machine learning (ML) and deep learning (DL) algorithms based on researchers' specific data needs.
  • * Results showed GPT-4o effectively recommended suitable algorithms for various radiology tasks, signaling its potential to bridge knowledge gaps and enhance research quality in the field.
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Purpose: Musculoskeletal sarcomas are a rare group of malignant neoplasms, accounting for approximately 12 % of all malignant neoplasms among children. Childhood cancer outcomes vary between developed and developing countries due to financial and educational inequalities. Telemedicine programs have a huge impact on the quality of cancer care, helping to optimize resources for better cancer care in a resource-limited setting.

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Anthelmintic resistance occurs worldwide in strongyles of ruminants but data from low-income countries are sparse and rarely apply most up to date methods, while effects of management practices in these countries are poorly documented. In Mozambique, benzimidazole resistance has been previously reported; the present study followed this up in detail, applying in vivo faecal egg count (FEC) reduction test (FECRT), in vitro egg hatch test (EHT) and molecular deep amplicon sequencing approaches targeting the internal transcribed spacer 2 (ITS-2, nemabiome) and the isotype 1 β-tubulin gene to determine the resistance status on farms and the strongyle species involved. Adult Landim goats (433) from six semi-intensive and ten extensive farms (22-30 animals/farm) from Maputo Province were visited April 2021 to February 2022.

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Background And Objectives: The characteristics of persistent long-term symptoms and their contribution to subjective quality of life remain unclear in patients with NMDAR encephalitis. In this study, we aimed to evaluate postacute neuropsychiatric symptoms, subjective cognitive complaints, and disease coping mechanisms and identify predictors of health-related quality of life (HRQoL) after N-methyl-D-aspartate receptor (NMDAR) encephalitis.

Methods: This cross-sectional observational study investigated patients with NMDAR encephalitis in the postacute phase.

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Energy transfer catalysis (EnT) has had a profound impact on contemporary organic synthesis enabling the construction of higher in energy, complex molecules, via efficient access to the triplet excited state. Despite this, intermolecular reactivity, and the unique possibility to access several reaction pathways via a central triplet diradical has rendered control over reaction outcomes, an intractable challenge. Extended chromophores such as non-symmetrical dienes have the potential to undergo [2+2] cycloaddition, [4+2] cycloaddition or geometric isomerisation, which, in combination with other mechanistic considerations (site- and regioselectivity), results in chemical reactions that are challenging to regulate.

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Longitudinal associations between well-being, hair cortisol, and self-reported health.

Appl Psychol Health Well Being

February 2025

Department of Education and Psychology, Freie Universität Berlin, Habelschwerdter Allee 45, Berlin, Germany.

This pre-registered study examines the longitudinal relationships between well-being, hair cortisol (a biomarker linked to poor health), and self-reported health. Accumulated cortisol output over three months was determined quarterly over the course of one year using hair samples. Well-being was assessed as affective well-being (via experience sampling), cognitive well-being (i.

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Background: Anthelmintic resistance in ruminants is a widespread problem that has a severe impact on productivity and animal welfare. The helminth Haemonchus contortus is generally considered the most important parasite in small ruminants due to its high pathogenicity and the widespread occurrence of anthelmintic resistance in it. Although the molecular mechanisms associated with resistance against the anthelmintics benzimidazoles (BZs) and levamisole are relatively well understood, the resistance mechanisms against the widely used anthelmintic macrocyclic lactones (MLs) ivermectin (IVM) and moxidectin (MOX) remain poorly understood.

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Structural insights into context-dependent inhibitory mechanisms of chloramphenicol in cells.

Nat Struct Mol Biol

December 2024

Structural and Computational Biology Unit, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany.

Ribosome-targeting antibiotics represent an important class of antimicrobial drugs. Chloramphenicol (Cm) is a well-studied ribosomal peptidyl transferase center (PTC) binder and growing evidence suggests that its inhibitory action depends on the sequence of the nascent peptide. How such selective inhibition on the molecular scale manifests on the cellular level remains unclear.

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Membrane potential states gate synaptic consolidation in human neocortical tissue.

Nat Commun

December 2024

Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Neurophysiology, Berlin, Germany.

Synaptic mechanisms that contribute to human memory consolidation remain largely unexplored. Consolidation critically relies on sleep. During slow wave sleep, neurons exhibit characteristic membrane potential oscillations known as UP and DOWN states.

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Carbapenem-resistant (CR-) bacteria are a serious global health concern due to their drug-resistance to nearly all available antibiotics, fast spread, and high mortality rate. O2afg is a major CR- serotype in the sequence type 258 group (KPST258) that is weakly immunogenic in humans. Here, we describe the creation and evaluation of semisynthetic O2afg glycoconjugate vaccine leads containing one and two repeating units of the polysaccharide epitope that covers the surface of the bacteria conjugated to the carrier protein CRM.

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Article Synopsis
  • The study examined the effectiveness of using multiparametric MRI (mpMRI) as a diagnostic tool for identifying clinically significant prostate cancer (csPCa) and its impact on managing biopsy decisions in men suspected of having the disease.
  • Conducted over three years at multiple urology practices in Berlin, the trial monitored participants with either positive or negative mpMRI results, allowing for a better understanding of patient outcomes and the safety of the protocol.
  • Results indicated that a significant number of men avoided unnecessary biopsies over time, with a small percentage of those initially deemed negative later diagnosed with csPCa, suggesting the monitoring strategy may be feasible and safe for patients.
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Comparative analysis of cell morphology in patient-paired primary human osteoblasts from the jaw and the fibula.

J Craniomaxillofac Surg

December 2024

Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Albert-Ludwigs-University of Freiburg, Freiburg im Breisgau, Germany; Charite - Universitatsmedizin Berlin, Corporate Member of Freie Universitat Berlin, Humboldt-Universitat zu Berlin, And Berlin Institute of Health, Department of Oral and Maxillofacial Surgery, Germany. Electronic address:

Previous studies hint at possible differences in osteogenic, osteoimmunologic, and angiogenetic potential among primary human osteoblasts (HOBs) from different origins (iliac and alveolar bone) within the same patient. In this study, HOBs from the jaw and the fibula were investigated for the first time to gain further knowledge about the similarities and differences on the cellular morphological level. Patient-paired HOB cultures from the jaw and fibula of 14 patients (60.

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The interaction of unfractionated heparin (UFH) with universal heparin reversal agent 7 (UHRA-7) is investigated. UHRA-7 is composed of a hyperbranched polyglycerol core onto which an array of methylated tris(2-aminoethylamine) (Me-TREN) charged groups is grafted, which in turn are shielded with a layer of small chain poly(ethylene glycol) methyl ether (mPEG) chains. This system has previously been shown to be biocompatible and to be effective at neutralizing heparin.

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Article Synopsis
  • The study aimed to establish epidemiological cut-off values for the minimum inhibitory concentrations (MICs) of 10 antimicrobial agents against the bacteria Vibrio parahaemolyticus using standardized testing methods.
  • Eight laboratories conducted broth microdilution tests at two different temperatures (35°C and 28°C) to assess the effect of incubation temperature on MIC values, finding that many values were consistent across both temperatures.
  • The generated data will be submitted to the Clinical and Laboratory Standards Institute to help set international standards for interpreting antimicrobial susceptibility tests for this species.
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Background: Patients with autosomal dominant polycystic kidney disease (ADPKD) represent >10% of patients awaiting kidney transplantation. These patients are prone to potentially severe urinary tract (UTI) and liver cyst infections after transplantation. Whether such infections compromise outcome is unclear.

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The combined assessment of p16 and Mib/Ki-67 in oral squamous cell carcinoma.

Front Oncol

November 2024

Department of Oral and Maxillofacial Surgery, Fachklinik Hornheide, Münster, Germany.

Objective: Despite numerous studies addressing the impact of p16 in oral squamous cell carcinoma (OSCC), consistent data regarding survival and tumor proliferation behavior are lacking. Although some authors investigate both p16 and Mib/Ki-67 in their cohorts, direct correlations are consistently missing. The aim of this study was to investigate the combined influence of p16 and Mib/Ki-67 status on prognosis in OSCC.

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Background: Post malaria neurologic syndrome (PMNS) is a rare complication of malaria, usually caused by Plasmodium falciparum. The clinical picture is highly variable and ranges from qualitative disturbances of consciousness and psychosis to damage to the peripheral nerves, usually occurring three to eight weeks after treated malaria.

Case Presentation: We report the case of a 54-year-old male who presented with recurrent clinical symptoms three and a half weeks after severe falciparum malaria.

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Antibiotic-perturbed microbiota and the role of probiotics.

Nat Rev Gastroenterol Hepatol

December 2024

International Scientific Association for Probiotics and Prebiotics, Consulting Scientific Advisor, Centennial, CO, USA.

Article Synopsis
  • * Clinical studies show probiotics might help reduce side effects like diarrhea from Clostridioides difficile, yet there's no direct evidence connecting these outcomes to microbiota protection.
  • * The review discusses the complexities of studying microbiota restoration, including the challenges of defining a "normal" microbiota, varying measurement methods, and individual differences, while suggesting future research directions.
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In topological band theory, phonon boundary modes consequence of a topologically non-trivial  band structure feature desirable properties for atomically-precise technologies, such as robustness against defects, waveguiding, and one-way transport. These topological phonon boundary modes remain to be studied both theoretically and experimentally in synthetic materials, such as polymers and supramolecular assemblies at the atomistic level under thermal fluctuations. Here we show by means of molecular simulations, that surface-confined Su-Schrieffer-Heeger (SSH) phonon analogue models express robust topological phonon boundary modes at heavy boundaries and under thermal fluctuations.

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Brain cytotoxic edema is a neuroradiological sign secondary to variegate diseases ranging from migraine to fulminant Listeria rhombencephalitis. The tempestive identification of its underlying cause is vital for an effective treatment as any delay may be fatal. However, the lack of distinctive imaging biomarkers and the paucity of reports pose a significant challenge in its diagnosis and frequently lead to a misdiagnosis particularly with the more common acute ischemic stroke.

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Using paired-end read orientations to assess technical biases in capture Hi-C.

NAR Genom Bioinform

December 2024

The Robinson Lab, The Jackson Laboratory for Genomic Medicine, 10 Discovery Drive, 06032, Connecticut, USA.

Hi-C and capture Hi-C (CHi-C) both leverage paired-end sequencing of chimeric fragments to gauge the strength of interactions based on the total number of paired-end reads mapped to a common pair of restriction fragments. Mapped paired-end reads can have four relative orientations, depending on the genomic positions and strands of the two reads. We assigned one paired-end read orientation to each of the four possible re-ligations that can occur between two given restriction fragments.

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Death after sauna-case report of a heat stroke associated subarachnoid hemorrhage.

Front Cardiovasc Med

November 2024

Freie Universität Berlin, Humboldt Universität zu Berlin, and Berlin Institute of Health, Department of Anesthesiology and Intensive Care Medicine, Campus Benjamin Franklin, Charité - Universitätsmedizin Berlin, Berlin, Germany.

Article Synopsis
  • * Initial checks showed no immediate issues, but her lab results indicated a fast-developing condition called disseminated intravascular coagulation (DIC) alongside an asymptomatic COVID-19 infection.
  • * Tragically, she died 38 hours after being admitted due to complications from DIC, highlighting the severe risks of heat exposure and the need for preventive measures.
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Background: Anaphylaxis is a systemic allergic reaction that is potentially life-threatening. Occupational anaphylaxis is an anaphylaxis that occurs in an occupational context. In this position paper, we propose diagnostic criteria for occupational anaphylaxis and provide an overview of the current state of knowledge in terms of prevalence, triggers, prevention, and management.

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Modern potential energy surfaces have shifted attention to molecular simulations of chemical reactions. While various methods can estimate rate constants for conformational transitions in molecular dynamics simulations, their applicability to studying chemical reactions remains uncertain due to the high and sharp energy barriers and complex reaction coordinates involved. This study focuses on the thermal cis-trans isomerization in retinal, employing molecular simulations and comparing rate constant estimates based on one-dimensional rate theories with those based on sampling transitions and grid-based models for low-dimensional collective variable spaces.

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Risk of congenital malformations and miscarriages following maternal use of oral fluconazole during the first trimester of pregnancy: a systematic review and meta-analysis.

Eur J Epidemiol

December 2024

Sorbonne Université, INSERM, Institut Pierre Louis d'Epidémiologie et de Santé Publique, Equipe PEPITES, AP-HP, Hôpital Trousseau, Département de Santé Publique, Centre de Référence sur les Agents Tératogènes (CRAT), F75012, Paris, France.

Article Synopsis
  • The systematic review analyzed the effects of oral fluconazole on major congenital malformations (MCM) and miscarriages during the first trimester of pregnancy, including nine studies with over 3.7 million pregnancies.
  • Findings indicated that while crude estimates suggested a slight increase in overall MCM risk with fluconazole use, adjusted estimates showed no significant association, particularly for subtypes of MCM.
  • A notable link was found between fluconazole use and miscarriages, especially at doses exceeding 150 mg, highlighting the need for cautious use during early pregnancy despite the overall low risk for MCM.
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