4,064 results match your criteria: "Hebrew University - Hadassah Medical School[Affiliation]"

G6PC2 controls glucagon secretion by defining the set point for glucose in pancreatic α cells.

Sci Transl Med

January 2025

Institute of Diabetes, Obesity, and Metabolism, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.

Elevated glucagon concentrations have been reported in patients with type 2 diabetes (T2D). A critical role for α cell-intrinsic mechanisms in regulating glucagon secretion was previously established through genetic manipulation of the glycolytic enzyme glucokinase (GCK) in mice. Genetic variation at the glucose-6-phosphatase catalytic subunit 2 () locus, encoding an enzyme that opposes GCK, has been reproducibly associated with fasting blood glucose and hemoglobin A1c.

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Objective: To upgrade cleaning and disinfection of patient rooms in a crowded emergency department (ED).

Setting: Tertiary referral hospital.

Design: Prospective, 3-component, before-and-after intervention study.

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Cellular identity requires the concerted action of multiple transcription factors (TFs) bound together to enhancers of cell-type-specific genes. Despite TFs recognizing specific DNA motifs within accessible chromatin, this information is insufficient to explain how TFs select enhancers. Here we compared four different TF combinations that induce different cell states, analysing TF genome occupancy, chromatin accessibility, nucleosome positioning and 3D genome organization at the nucleosome resolution.

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Background: C-reactive protein (CRP) is increasingly being used as an inflammatory marker in sepsis. Its main use is for diagnosis, less for prognosis, while it is increasingly used for serial monitoring of response to treatment - with little evidence to support this practice.

Objectives: Assessment of the effectiveness of serial measurements of CRP in the management of patients with blood stream infection (BSI).

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Time is encoded by methylation changes at clustered CpG sites.

bioRxiv

December 2024

Dept. of Developmental Biology and Cancer Research, Institute for Medical Research Israel-Canada, The Hebrew University-Hadassah Medical School, Jerusalem, Israel.

Age-dependent changes in DNA methylation allow chronological and biological age inference, but the underlying mechanisms remain unclear. Using ultra-deep sequencing of >300 blood samples from healthy individuals, we show that age-dependent DNA methylation changes are regional and occur at multiple adjacent CpG sites, either stochastically or in a coordinated block-like manner. Deep learning analysis of single-molecule patterns in two genomic loci achieved accurate age prediction with a median error of 1.

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What should you have in your little black bag? A letter to a young doctor.

Postgrad Med J

December 2024

The Faculty of Medicine, Hebrew University Hadassah Medical School, Ein Kerem, Jerusalem 91120, Israel.

Rather than looking at which instruments to put in the traditional physician's black bag, the changing face of medicine suggests that some virtual assets assume prime importance. With a solid background of core knowledge and skills acquired through medical school but continuously developed and updated, several habitual attitudes are advocated-each aiming to address a different facet of concerns in today's time-constrained, often impersonal, fast-changing, information-overloaded, and highly technological practice. They include humility, curiosity, "red flag" identification, and reflexive database consultation-each with myriad, diverse advantages.

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Acetaminophen in Pregnancy and Attention-Deficit and Hyperactivity Disorder and Autistic Spectrum Disorder.

Obstet Gynecol

December 2024

Department of Clinical Pharmacology, Odense University Hospital, and the Department of Clinical Research, University of Southern Denmark, Odense, Denmark; Clinical Pharmacology & Pharmacotherapy, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Leuven, Belgium; Radboud University Medical Center, Nijmegen, the Netherlands; Service of Pharmacy, Lausanne University Hospital and University of Lausanne, Lausanne, and the Institute of Primary Health Care (BIHAM), University of Bern, Bern, Switzerland; the Pharmacy Department, Rotunda Hospital and School of Pharmacy and Biomolecular Sciences, Royal College of Surgeons in Ireland, Dublin, Ireland; the Department of Pediatrics, University of California San Diego, La Jolla, California; Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Pharmakovigilanzzentrum, Embryonaltoxikologie, Institut für Klinische Pharmakologie und Toxikologie, Berlin, Germany; Mothersafe, University of New South Wales, Australia; UK Teratology Information Service and the Directorate of Women's Services, Royal Victoria Infirmary, Newcastle Upon Tyne, United Kingdom; the Department of Environmental and Occupational Health Sciences, School of Public Health, University of Washington, Seattle, Washington; the Israeli Teratology Information Service, Ministry of Health, and the Hebrew University Hadassah Medical School, Jerusalem, Israel; the Department of Obstetrics and Gynecology, Morsani College of Medicine, University of South Florida, Tampa, Florida; and the Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia, Canada.

Acetaminophen is a common over-the-counter medication that recently gained substantial media attention regarding its use by pregnant individuals. In this clinical perspective, we discuss the strengths and limitations of the published literature on the effect of maternal acetaminophen use in pregnancy on the child's risk of developing attention-deficit and hyperactivity disorder (ADHD) and autistic spectrum disorder (ASD). Studies included were specifically selected on the basis of the quality and validity of ADHD or ASD outcome definitions.

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Flagellar rotation facilitates the transfer of a bacterial conjugative plasmid.

EMBO J

December 2024

Department of Microbiology and Molecular Genetics, Institute for Medical Research Israel-Canada (IMRIC), The Hebrew University-Hadassah Medical School, POB 12272, The Hebrew University of Jerusalem, 91120, Jerusalem, Israel.

Article Synopsis
  • Conjugation-mediated DNA delivery is a key way antibiotic resistance spreads among bacteria, but the details of how this process works are not well understood.
  • The pLS20 plasmid, found in Bacillus species, uniquely requires fluid environments and induces multicellular clustering to enhance DNA transfer.
  • This study found that the pLS20 plasmid’s gene expression relies on the presence of bacterial flagella, connecting motility with the activation of conjugation during active movement, potentially spreading the plasmid to new areas.
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: Osteoporotic hip fractures in cirrhotic subjects are associated with increased post-fracture mortality. Our aim was to identify unfavorable factors that were associated with increased post-fracture mortality. : We employed a retrospective evaluation of the short- and long-term prognosis of cirrhotic patients that were admitted with a hip fracture to our institution.

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The IsletTester mouse: an immunodeficient model with stable hyperglycemia for the study of human islets.

Diabetes

November 2024

Institute of Diabetes, Obesity, and Metabolism, Perelman School of Medicine, The University of Pennsylvania, 3400 Civic Center Boulevard, Philadelphia, PA, USA 19104.

Article Synopsis
  • The current gold standard for testing human islet or stem cell-derived β-like cell function involves implanting them in immunodeficient mice, but existing models have limitations like unstable hyperglycemia and high morbidity.
  • Researchers developed the IsletTester mouse using CRISPR-Cas9 to create a stable hyperglycemic model, showing normal life span and fertility with consistent glucose levels.
  • This new model allows for better study of human islet biology and serves as a valuable preclinical tool for evaluating stem cell-derived islet products.
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In recent decades, the recognition of the importance of sex, gender and their interrelationship for health research and for the practice of medicine has grown. Accordingly, the move to include gender medicine in medical school curricula has gained momentum in many countries. This article reviews the challenges of integrating this subject into medical school curricula and details the recent initiative to mainstream gender medicine into the six-year curriculum of the Hadassah-Hebrew University Medical School in Jerusalem, Israel.

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Extraordinary Pleural Exudate - Bilothorax.

Am J Med

November 2024

Adelson School of Medicine, Ariel University, Israel; Department of Imaging, Laniado University Hospital, Sanz Medical Center, Netanya, Israel.

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Breaking a dogma: orthodontic tooth movement alters systemic immunity.

Prog Orthod

October 2024

Department of Orthodontics, Faculty of Dental Medicine, Hebrew University of Jerusalem, Hadassah Medical Center, Jerusalem, Israel.

Background: The prevailing paradigm posits orthodontic tooth movement (OTM) as primarily a localized inflammatory process. In this study, we endeavor to elucidate the potential ramifications of mechanical force on systemic immunity, employing a time-dependent approach.

Materials And Methods: A previously described mouse orthodontic model was used.

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EspH utilizes phosphoinositide and Rab binding domains to interact with plasma membrane infection sites and Rab GTPases.

Gut Microbes

September 2024

Department of Biological Chemistry, The Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, The Edmond J. Safra Campus - Givat Ram, Jerusalem, Israel.

Enteropathogenic (EPEC) is a Gram-negative bacterial pathogen that causes persistent diarrhea. Upon attachment to the apical plasma membrane of the intestinal epithelium, the pathogen translocates virulence proteins called effectors into the infected cells. These effectors hijack numerous host processes for the pathogen's benefit.

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Issues Concerning the Mechanisms of Bone Conduction.

Audiol Res

September 2024

Department of Medical Neurobiology (Physiology), Hebrew University-Hadassah Medical School, Jerusalem 91120, Israel.

Air and bone conduction thresholds are used to differentiate between conductive and sensori-neural hearing losses because bone conduction is thought to bypass the conductive apparatus, directly activating the inner ear. However, the suggested bone conduction mechanisms involve the outer and middle ears. Also, normal bone conduction thresholds have been reported in cases of lesions to the conduction pathway.

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Article Synopsis
  • * Researchers analyzed cell-free DNA (cfDNA) from blood samples of a patient with HER2-positive endometrial cancer who developed ILD, as well as samples from other patients, to detect lung damage through specific methylation markers.
  • * The findings suggest that liquid biopsy, an easy and cost-effective method, could effectively monitor ADC-related ILD, potentially offering a better alternative to traditional imaging techniques.
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Article Synopsis
  • The rise of personalized medicine has highlighted the importance of comprehensive genomic profiling (CGP), but challenges in assay standardization and understanding bioinformatics hinder uniform implementation.
  • Two in-house CGP assays were compared in a research context, revealing both agreements and significant differences in detecting genetic variants and providing clinical recommendations.
  • These discrepancies were attributed to varied bioinformatics methods for variant analysis, emphasizing the need for careful consideration in implementing high-quality CGP to ensure consistent and reliable genomic insights.
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Inhibition of nucleo-cytoplasmic proteasome translocation by the aromatic amino acids or silencing Sestrin3-their sensing mediator-is tumor suppressive.

Cell Death Differ

October 2024

The Rappaport Technion Integrated Cancer Center (R-TICC) and the Rappaport Faculty of Medicine and Research Institute, Technion-Israel Institute of Technology, Haifa, Israel.

Article Synopsis
  • - The proteasome, critical in degrading unwanted proteins, shifts between the nucleus and cytoplasm depending on amino acid availability, particularly under starvation conditions, which affects protein synthesis.
  • - The presence of three aromatic amino acids (Tyr, Trp, Phe) can inhibit the proteasome's movement to the cytoplasm and trigger cell death, while their higher concentrations in healthy cells can disrupt key stress signaling pathways.
  • - Using the aromatic amino acids has shown potential for cancer therapy by sequestering the proteasome in the nucleus, inhibiting tumor growth, and altering various cell processes related to proliferation and death, suggesting Sestrin3's significant role in this mechanism.
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Splenic spread and hepatic encephalopathy in metastatic malignant melanoma.

QJM

September 2024

Departments of Medicine (AS, ID), Imaging (YG), and Pathology (RH), Laniado University Hospital, Sanz Medical Center, Netanya, and the Adelson School of Medicine, Ariel University, (AS, ID, YG, RH), and Faculty of Medicine, Hebrew University Hadassah Medical School, Jerusalem (AS), Israel.

An older adult patient was admitted with epigastric pain and vomiting and found to have an abdominal mass, increased cholestatic liver enzymes and markedly elevated serum lactate dehydrogenase (LDH). Imaging revealed extensive liver metastases of unknown primary but also an unusual splenic metastasis diagnosed by liver biopsy as malignant melanoma. The patient became lethargic and developed mental status changes associated with asterixis, abnormal EEG, and increased serum ammonia levels.

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Detoxification of heme in depends on its crystallization into hemozoin. This pathway is a major target of antimalarial drugs. The crystalline structure of hemozoin was established by X-ray powder diffraction using a synthetic analog, β-hematin.

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CMV is a ubiquitous DNA virus that establishes infection and results in 40-100% seropositivity. Viral replication occurs following an acquired primary infection (or reinfection) or by the reactivation of life-long latency. In immunocompetent patients, CMV infection is mostly asymptomatic or mild and self-limited.

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Glycogen storage disease type III (GSDIII) is a hereditary glycogenosis caused by deficiency of the glycogen debranching enzyme (GDE), an enzyme, encoded by , enabling glycogen degradation by catalyzing alpha-1,4-oligosaccharide side chain transfer and alpha-1,6-glucose cleavage. GDE deficiency causes accumulation of phosphorylase-limited dextrin, leading to liver disorder followed by fatal myopathy. Here, we tested the capacity of the new autophagosomal activator GHF-201 to alleviate disease burden by clearing pathogenic glycogen surcharge in the GSDIII mouse model .

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Article Synopsis
  • A 29-year-old Korean woman with chronic aplastic anemia experienced seizures linked to complications from cyclosporine treatment.
  • The condition was identified as posterior reversible encephalopathy syndrome due to unpredictable accumulation of the drug.
  • This case highlights the importance of closely monitoring cyclosporine levels and making careful dose adjustments to avoid complications.
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