19,421 results match your criteria: "Weizmann Institute.[Affiliation]"

Article Synopsis
  • The study investigates how Mycobacterium tuberculosis (Mtb) grows differently compared to other bacteria, particularly focusing on its cell growth patterns and behaviors at the single-cell level.
  • Using time-lapse imaging and mathematical modeling, it was found that Mtb has an asymmetric growth pattern and displays variability in cell size, growth speed, and division times.
  • Unlike typical bacteria that grow exponentially, Mtb grows in a linear fashion, indicating that its growth regulation mechanisms might differ significantly from those of other bacterial species.
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Cloud microphysics studies include how tiny cloud droplets grow and become rain. This is crucial for understanding cloud properties like size, life span, and impact on climate through radiative effects. Small weak-updraft clouds near the haze-to-cloud transition are especially difficult to measure and understand.

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Background: Breathing patterns may inform on health. We note that the sites of earliest brain damage in Parkinson's disease (PD) house the neural pace-makers of respiration. We therefore hypothesized that ongoing long-term temporal dynamics of respiration may be altered in PD.

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Antiviral STANDs (Avs) are bacterial anti-phage proteins evolutionarily related to immune pattern recognition receptors of the NLR family. Type 2 Avs proteins (Avs2) were suggested to recognize the phage large terminase subunit as a signature of phage infection. Here, we show that Avs2 from Klebsiella pneumoniae (KpAvs2) can recognize several different phage proteins as signature for infection.

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Time crystals are a dynamical phase of periodically driven quantum many-body systems where discrete time-translation symmetry is broken spontaneously. Time-crystallinity however subtly requires also spatial order, ordinarily related to further symmetries, such as spin-flip symmetry when the spatial order is ferromagnetic. Here we define topologically ordered time crystals, a time-crystalline phase borne out of intrinsic topological order-a particularly robust form of spatial order that requires no symmetry.

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Intrinsic Rashba Effect in Stable Configurations of Two-Dimensional (PEA)PbI.

J Phys Chem Lett

November 2024

Schulich Faculty of Chemistry, Solid State Institute, Russell Berrie Nanotechnology Institute, Helen Diller Quantum Information Center and the Grand Technion Energy Program, Technion, Haifa 3200003, Israel.

Halide perovskites (HPs) are crystalline solids that feature a unique softness, absent in conventional semiconducting materials. In recent years, this softness has been pivotal to many properties in these materials, in both static and dynamic regimes. Here, we focus on the two-dimensional (2D) (PEA)PbI crystal.

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Flow cytometry enables quantitative measurements of fluorescence in single cells. The technique was widely used for immunology to identify populations with different surface protein markers. More recently, the usage of flow cytometry has been extended to additional readouts, including intracellular proteins and fluorescent protein transgenes, and is widely utilized to study developmental biology, systems biology, microbiology, and many other fields.

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The blood enzyme glutamate-oxaloacetate transaminase (GOT) has been postulated as an effective therapeutic to protect the brain during stroke. To demonstrate its potential clinical utility, a new human recombinant form of GOT (rGOT) was produced for medical use. We tested the pharmacokinetics and evaluated the protective efficacy of rGOT in rodent and non-human primate models that reflected clinical stroke conditions.

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Origins of synergy in multilipid lubrication.

Proc Natl Acad Sci U S A

November 2024

Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot 76100, Israel.

Lipid bilayers, ubiquitous in living systems, form lubricious boundary layers in aqueous media, with broad relevance for biolubrication, especially in mechanically stressed environments such as articular cartilage in joints, as well as for modifying material interfacial properties. Model studies have revealed efficient lubricity by single-component lipid bilayers; synovial joints, however (e.g.

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The mechanisms underlying the current greenhouse gas (GHG) forced decline in Mediterranean rainfall remain a matter of debate. To inform our understanding of the current and projected drying, we examined extended arid intervals in the late Quaternary, Eastern Mediterranean (EM) Levant indicated by substantial salt deposits in a Dead Sea sediment core covering the past 220 kyr. These arid events occurred during interglacials, when the Earth was at perihelion to the sun in boreal fall and during glacial-interglacial transitions, associated with icesheet melting.

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Neoantigen immunogenicity prediction is a highly challenging problem in the development of personalised medicines. Low reactivity rates in called neoantigens result in a difficult prediction scenario with limited training datasets. Here we describe ImmugenX, a modular protein language modelling approach to immunogenicity prediction for CD8+ reactive epitopes.

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The ability to obtain quantitative spatial information on subcellular processes of deep tissues has been a long-standing challenge for molecular magnetic resonance imaging (MRI) approaches. This challenge remains even more so for quantifying readouts of genetically engineered MRI reporters. Here, we set to overcome this challenge with a molecular system designed to obtain quantitative H-MRI maps of a gene reporter.

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Article Synopsis
  • * Advanced methods like single-cell RNA sequencing allow researchers to analyze individual B cells from tumors, identifying various subtypes and their immune receptor profiles.
  • * The study introduces a technique to assess how well these B cell antibodies bind to tumors, which could improve immunotherapy strategies and better inform clinical applications.
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: Decreased cerebral oximetry (rSO) in cardiac surgery is associated with postoperative delirium (POD). However, interventions optimizing intraoperative rSO are inconclusive. : In this prospective observational cohort study, the relationship between rSO, middle cerebral artery blood flow velocity (MCAV), and processed EEG was assessed in cardiac surgery patients with and without POD.

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Controlling polymorphism, namely, the occurrence of multiple crystal forms for a given compound, is still an open technological challenge that needs to be addressed for the reliable manufacturing of crystalline functional materials. Here, we devised a series of 13 organic crystals engineered to embody molecular fragments undergoing specific nanoscale motion anticipated to drive cooperative order-disorder phase transitions. By combining polarized optical microscopy coupled with a heating/cooling stage, differential scanning calorimetry, X-ray diffraction, low-frequency Raman spectroscopy, and calculations (density functional theory and molecular dynamics), we proved the occurrence of cooperative transitions in all the crystalline systems, and we demonstrated how both the molecular structure and lattice dynamics play crucial roles in these peculiar solid-to-solid transformations.

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The cell adhesion molecule L1CAM (L1), mainly known for its function in brain cells, is a Wnt/β-catenin signaling target gene in colorectal cancer (CRC) cells, where it promotes invasion and liver metastasis. We interrogated which genes are expressed at increased levels in human CRC tissue and induced in CRC cell lines overexpressing L1. We found increased cyclin D2 levels in CRC tissue and LS 174T and HCT 116 human CRC cells overexpressing L1.

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Core facilities are crucial for cutting-edge scientific research in academic institutions, yet they place a significant financial burden on budgets. The viability of these facilities can be improved through cross-institutional collaborations, although initiating and sustaining such partnerships poses challenges. Insights from Israel's recent nationwide organization of core facilities could offer valuable lessons for fostering similar cooperation elsewhere.

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2-Arylhydrazinylidene-3-oxo-3-polyfluoroalkylpropanoic acids as selective and effective carboxylesterase inhibitors with powerful antioxidant potential.

Bioorg Med Chem

December 2024

Department of Environmental Health Sciences, University of Michigan, Ann Arbor, MI 48109, USA; Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA; Center of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI 48109, USA; Michigan Institute for Computational Discovery and Engineering, University of Michigan, Ann Arbor, MI 48109, USA; Michigan Institute for Data and AI in Society, University of Michigan, Ann Arbor, MI 48109, USA. Electronic address:

A series of 2-arylhydrazinylidene-3-oxo acids (AHOAs) was prepared by dealkylation of alkyl-2-arylhydrazinylidene-3-oxo-3-alkanoates with AlBr. Using X-Ray, NMR spectroscopy, and quantum mechanical calculations (QM), the existence of AHOAs in a thermodynamically favorable Z-form stabilized by two intramolecular H-bonds was established. All AHOAs had acceptable ADME parameters.

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Article Synopsis
  • Dietary habits and food intake significantly influence obesity management, with the study highlighting variations between men and women in dietary behaviors related to weight loss.
  • Over a two-year analysis of 8,548 participants, it was found that individuals with obesity consumed more animal-based proteins and fewer plant-based proteins compared to normal-weight counterparts.
  • Specific foods, such as eggs and apples for men and women respectively, showed notable associations with weight reduction, enhancing understanding of sex-based dietary recommendations for effective weight loss strategies.
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Aging varies significantly among individuals of the same chronological age, indicating that biological age (BA), estimated from molecular and physiological biomarkers, may better reflect aging. Prior research has often ignored sex-specific differences in aging patterns and mainly focused on aging biomarkers from a single data modality. Here we analyze a deeply phenotyped longitudinal cohort (10K project, Israel) of 10,000 healthy individuals aged 40-70 years that includes clinical, physiological, behavioral, environmental and multiomic parameters.

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Osmotic stress, caused by the lack of water or by high salinity, is a common problem in plant roots. Osmotic stress can be reproducibly simulated with the application of solutions of the high-molecular-weight and impermeable polyethylene glycol. The accumulation of different reactive oxygen species, such as singlet oxygen, superoxide, and hydrogen peroxide, accompany this stress.

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Article Synopsis
  • 2D materials, such as transition metal-dichalcogenides like MoS, have gained significant attention for their unique layered structures, which lead to distinct physicochemical properties when isolated as single layers compared to their bulk forms.
  • The ability to stack and twist these layers creates new phenomena, such as Moiré patterns, while misfit layer compounds (MLCs) introduce unconventional lattice structures that allow for the formation of nanotubes.
  • The stability and behavior of these nanostructures, particularly under elevated temperatures, are important aspects that remain underexplored, prompting studies using advanced techniques like electron microscopy and synchrotron-based X-ray methods to understand their decomposition and recrystallization processes.
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Tumor progression is driven by dynamic interactions between cancer cells and their surrounding microenvironment. Investigating the spatiotemporal evolution of tumors can provide crucial insights into how intrinsic changes within cancer cells and extrinsic alterations in the microenvironment cooperate to drive different stages of tumor progression. Here, we integrate high-resolution spatial transcriptomics and evolving lineage tracing technologies to elucidate how tumor expansion, plasticity, and metastasis co-evolve with microenvironmental remodeling in a -driven mouse model of lung adenocarcinoma.

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Myeloid derived suppressor cells mediate hepatocyte proliferation and immune suppression during liver regeneration following resection.

Genes Immun

December 2024

The Laboratory of Molecular Biology, Department of Surgery and Transplantation, Sheba Medical Center, Tel-Hashomer, Faculty of Medicine and Medical Sciences, Tel-Aviv University, Tel-Aviv, Israel.

Liver regeneration following resection is a complex process relying on coordinated pathways and cell types in the remnant organ. Myeloid-Derived Suppressor Cells (MDSCs) have a role in liver regeneration-related angiogenesis but other roles they may play in this process remain to be elucidated. In this study, we sought to examine the effect of G-MDSCs on hepatocytes proliferation and immune modulation during liver regeneration.

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Distinct Ventral Hippocampus Network Properties in Dissociated Cultures.

Hippocampus

December 2024

Department of Brain Sciences, The Weizmann Institute, Rehovot, Israel.

Extensive research has been focused in the past century on structural, physiological, and molecular attributes of the hippocampus. This interest was created by the unique involvement of the hippocampus in cognitive and affective functions of the brain. Functional analysis revealed that the hippocampus has divergent properties along its axial dimension to the extent that the dorsal sector (dorsal hippocampus, DH) has different connections with the rest of the brain than those of the ventral sector (VH).

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