8,198 results match your criteria developed termed

PRISM: A Novel Human Islet Isolation Technique.

Transplantation 2021 Jul 22. Epub 2021 Jul 22.

Dept of Internal Medicine, Leiden University Medical Center, P.O. Box 9600, 2300 RC, Leiden, The Netherlands.

Background: Successful pancreatic islet isolations are a key requirement for islet transplantation in selected patients with type 1 diabetes. However, islet isolation is a technically complex, time-consuming, manual process. Optimization and simplification of the islet isolation procedure could increase islet yield and quality, require fewer operators and thus reduce cost. Read More

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A database and deep learning toolbox for noise-optimized, generalized spike inference from calcium imaging.

Nat Neurosci 2021 Aug 2. Epub 2021 Aug 2.

Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland.

Inference of action potentials ('spikes') from neuronal calcium signals is complicated by the scarcity of simultaneous measurements of action potentials and calcium signals ('ground truth'). In this study, we compiled a large, diverse ground truth database from publicly available and newly performed recordings in zebrafish and mice covering a broad range of calcium indicators, cell types and signal-to-noise ratios, comprising a total of more than 35 recording hours from 298 neurons. We developed an algorithm for spike inference (termed CASCADE) that is based on supervised deep networks, takes advantage of the ground truth database, infers absolute spike rates and outperforms existing model-based algorithms. Read More

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Ab initio multi-level layered elongation method and its application to local interaction analysis between DNA bulge and ligand molecules.

J Chem Phys 2021 Jul;155(4):044110

Department of Material Sciences, Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Park, Fukuoka 816-8580, Japan.

A multi-level layered elongation method was developed for efficiently analyzing the electronic states of local structures in large bio/nano-systems at the full ab initio level of theory. The original elongation method developed during the last three decades in our group has focused on the system in one direction from one terminal to the other terminal to sequentially construct the electronic states of a polymer, called a theoretical synthesis of polymers. In this study, an important region termed the central (C) part is targeted in a large polymer and the remainder are terminal (T) parts. Read More

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Free Energy Calculations Shed Light on the Nuclear Pore Complex's Selective Barrier Nature.

Biophys J 2021 Jul 30. Epub 2021 Jul 30.

Molecular Cell Biomechanics Laboratory, Departments of Bioengineering and Mechanical Engineering, University of California, Berkeley, CA 94720; Molecular Biophysics and Integrative Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720. Electronic address:

The nuclear pore complex (NPC) is the exclusive gateway for traffic control across the nuclear envelope. While smaller cargoes (less than 5-9 nm in size) can freely diffuse through the NPC, the passage of larger cargoes is restricted to those accompanied by nuclear transport receptors (NTRs). This selective barrier nature of the NPC is putatively associated with the intrinsically disordered, phenylalanine-glycine repeat domain containing nucleoporins, termed FG-Nups. Read More

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Durable response after immune checkpoint inhibitor-related diabetes in mismatch repair deficient pancreatic cancer.

Immunotherapy 2021 Aug 2. Epub 2021 Aug 2.

Department of Medicine, Division of Hematology & Oncology, University of California, San Francisco, CA, 94158, USA.

Mismatch repair protein deficiency occurs in 0.8-2% of pancreatic ductal adenocarcinomas and confers susceptibility to immunotherapy. Herein, we report the case of a patient with Lynch syndrome-associated, locally advanced mismatch repair protein deficiency pancreatic ductal adenocarcinomas who demonstrated a sustained response to second-line treatment with pembrolizumab, but eventually developed immune-related diabetic ketoacidosis requiring discontinuation of treatment. Read More

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Comparison of beta-ligands used in cattle production: structures, safety, and biological effects.

J Anim Sci 2021 Aug;99(8)

RLEConsult, Bolivia, NC, USA.

Technologies that increase the efficiency and sustainability of food animal production to provide meat for a growing population are necessary and must be used in a manner consistent with good veterinary practices, approved labeled use, and environmental stewardship. Compounds that bind to beta-adrenergic receptors (β-AR), termed beta-adrenergic receptor ligands (β-ligands), are one such technology and have been in use globally for many years. Though all β-ligands share some similarities in structure and function, the significance of their structural and pharmacological differences is sometimes overlooked. Read More

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ExoHCR: a sensitive assay to profile PD-L1 level on tumor exosomes for immunotherapeutic prognosis.

Biophys Rep 2020 Dec 23;6(6):290-298. Epub 2020 Nov 23.

Center for Pharmaceutical Engineering and Sciences, Department of Pharmaceutics, School of Pharmacy, Virginia Commonwealth University, Richmond, VA 23298, USA.

Cancer immunotherapy has made recent breakthrough, including immune checkpoint blockade (ICB) that inhibits immunosuppressive checkpoints such as programmed cell death protein 1 (PD-1) and programmed death-ligand 1 (PD-L1). However, most cancer patients do not durably respond to ICB. To predict ICB responses for patient stratification, conventional immunostaining has been used to analyze the PD-L1 expression level on biopsied tumor tissues but has limitations of invasiveness and tumor heterogeneity. Read More

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December 2020

Alginate-coated activated charcoal enhances fecal excretion of 2,3,7,8-tetrachlorodibenzo-p-dioxin in mice, with fewer side effects than uncoated one.

J Toxicol Sci 2021 ;46(8):379-389

Laboratory of Hygienic Chemistry and Molecular Toxicology, Gifu Pharmaceutical University.

Activated charcoal (AC) is a potential candidate antidote against dioxins. However, it is difficult to take AC as a supplement on a daily basis, because its long-term ingestion causes side effects such as constipation and deficiency of fat-soluble essential nutrients and hypocholesterolemia. Alginate-coated AC, termed Health Carbon (HC), was developed to decrease the side effects of AC, but its pharmacological effects, including side effects, remains unclear. Read More

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January 2021

Catalytic Clusterbody for Enhanced Quantitative Protein Immunoblot.

Anal Chem 2021 Jul 30. Epub 2021 Jul 30.

Department of Chemistry and Biology, Faculty of Environment and Life Science, Beijing University of Technology, Beijing 100124, China.

To assess low-abundance protein biomarkers associated with tumor progression, we have developed artificial catalytic antibodies based on well-defined metal clusters modified with rationally designed peptides, termed clusterbodies. Such clusterbodies possess favorable integrated features of matched ultrasmall sizes, intrinsic fluorescence, and enzyme-like catalytic and selective recognition properties that are inaccessible to traditional antibodies. Consequently, a quantitative assay with high accuracy and high sensitivity is established by measuring the fluorescence and catalytic chemiluminescence of metal clusters preferentially recognizing the protein biomarker, which is confirmed by the molecular-weight marker references of immunoblotting. Read More

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Large-scale translatome profiling annotates the functional genome and reveals the key role of genic 3' untranslated regions in translatomic variation in plants.

Plant Commun 2021 Jul 23;2(4):100181. Epub 2021 Mar 23.

National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China.

The translatome, a profile of the translational status of genetic information within cells, provides a new perspective on gene expression. Although many plant genomes have been sequenced, comprehensive translatomic annotations are not available for plants due to a lack of efficient translatome profiling techniques. Here, we developed a new technique termed 3' ribosome-profiling sequencing (3'Ribo-seq) for reliable, robust translatomic profiling. Read More

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Trimethoprim-Sulfamethoxazole-Induced Aseptic Meningitis: A New Approach.

Cureus 2021 Jun 23;13(6):e15869. Epub 2021 Jun 23.

Internal Medicine, Jersey Shore University Medical Center, Neptune, USA.

Inflammation of the meningeal linings of the central nervous system (CNS), also known as meningitis, is one of the serious presentations in the emergency because it carries high morbidity and mortality. The most common cause is pus-producing organisms. However, non-suppurative meningitis, termed aseptic meningitis, is another cause of meningeal inflammation. Read More

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Honeycomb: a template for reproducible psychophysiological tasks for clinic, laboratory, and home use.

Braz J Psychiatry 2021 Jul 21. Epub 2021 Jul 21.

Brown University School of Engineering, Providence, RI, USA.

Objective: To improve the ability of psychiatry researchers to build, deploy, maintain, reproduce, and share their own psychophysiological tasks. Psychophysiological tasks are a useful tool for studying human behavior driven by mental processes such as cognitive control, reward evaluation, and learning. Neural mechanisms during behavioral tasks are often studied via simultaneous electrophysiological recordings. Read More

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Outer membrane vesicles derived from Typhimurium can deliver 2a O-polysaccharide antigen to prevent 2a infection in mice.

Appl Environ Microbiol 2021 Jul 28:AEM0096821. Epub 2021 Jul 28.

Department of Medical Microbiology, School of Medicine, Nanchang University, Nanchang, China, 330006.

Shigellosis has become a serious threat to health in many developing countries due to the severe diarrhea it causes. 2a ( 2a) is the principal species responsible for this endemic disease. Despite multiple attempts to design a vaccine against shigellosis, no effective vaccine has not yet been developed. Read More

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Isolation of Cowpea Mosaic Virus-Binding Peptides.

Biomacromolecules 2021 Jul 27. Epub 2021 Jul 27.

The plant virus cowpea mosaic virus (CPMV) is a natural nanocarrier that has been developed as a platform technology for the delivery of various payloads including peptide epitopes for vaccines, contrast agents for imaging, and drugs for therapy. Genetic fusion and chemical conjugations are the mainstay approaches to load the active ingredient to the exterior and/or interior of CPMV. However, these methods have limitations; genetic engineering is limited to biologics, and chemical alteration often requires multistep reactions with modification of both CPMV and the active ingredient. Read More

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Differential phosphoprotein signaling in the cortex in mouse models of Gulf War Illness using corticosterone and acetylcholinesterase inhibitors.

Heliyon 2021 Jul 12;7(7):e07552. Epub 2021 Jul 12.

Department of Orthopaedics, West Virginia University School of Medicine, Morgantown, WV, USA.

Aims: Veterans from the 1990-91 Gulf War were exposed to acetylcholinesterase inhibitors (AChEIs), and, following service, an estimated one-third began suffering from a medically unexplained, multi-symptom illness termed Gulf War Illness (GWI). Previous research has developed validated rodent models that include exposure to exogenous corticosterone (CORT) and AChEIs to simulate high stress and chemical exposures encountered in theater. This combination of exposures in mice resulted in a marked increase in neuroinflammation, which is a common symptom of veterans suffering from GWI. Read More

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Comprehensive Molecular Analyses of a Novel Mutational Signature Classification System with Regard to Prognosis, Genomic Alterations, and Immune Landscape in Glioma.

Front Mol Biosci 2021 7;8:682084. Epub 2021 Jul 7.

Department of Interventional Radiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.

Glioma is the most common malignant brain tumor with complex carcinogenic process and poor prognosis. The current molecular classification cannot fully elucidate the molecular diversity of glioma. Using broad public datasets, we performed cluster analysis based on the mutational signatures and further investigated the multidimensional heterogeneity of the novel glioma molecular subtypes. Read More

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Highly Specific and Sensitive Detection of by Portable Cas12a-UPTLFA Platform.

Front Microbiol 2021 7;12:700016. Epub 2021 Jul 7.

State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China.

The recent discovery of collateral cleavage activity of class-II clustered regularly interspaced short palindromic repeats-CRISPR-associated protein (CRISPR-Cas) makes CRISPR-based diagnosis a potential high-accuracy nucleic acid detection method. Colloidal gold-based lateral flow immunochromatographic assay (LFA), which has been combined with CRISPR/Cas-based nucleic detection, usually associates with drawbacks of relative high background and the subjectivity in naked-eye read-out of the results. Here, we developed a novel system composed of Cas12a-based nucleic acid detection and up-converting phosphor technology (UPT)-based LFA (UPT-LFA), termed Cas12a-UPTLFA. Read More

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A fully defined matrix to support a pluripotent stem cell derived multi-cell-liver steatohepatitis and fibrosis model.

Biomaterials 2021 Jul 9;276:121006. Epub 2021 Jul 9.

Stem Cell Institute, Department of Stem Cell and Developmental Biology, KU Leuven, Leuven, Belgium. Electronic address:

Chronic liver injury, as observed in non-alcoholic steatohepatitis (NASH), progressive fibrosis, and cirrhosis, remains poorly treatable. Steatohepatitis causes hepatocyte loss in part by a direct lipotoxic insult, which is amplified by derangements in the non-parenchymal cellular (NPC) interactive network wherein hepatocytes reside, including, hepatic stellate cells, liver sinusoidal endothelial cells and liver macrophages. To create an in vitro culture model encompassing all these cells, that allows studying liver steatosis, inflammation and fibrosis caused by NASH, we here developed a fully defined hydrogel microenvironment, termed hepatocyte maturation (HepMat) gel, that supports maturation and maintenance of pluripotent stem cell (PSC) derived hepatocyte- and NPC-like cells for at least one month. Read More

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Fast Ion-Chelate Dissociation Rate for MRI of Labile Zinc with Frequency-Specific Encodability.

J Am Chem Soc 2021 Aug 23;143(30):11751-11758. Epub 2021 Jul 23.

Department of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot 7610001, Israel.

Fast ion-chelate dissociation rates and weak ion-chelate affinities are desired kinetic and thermodynamic features for imaging probes to allow reversible binding and to prevent deviation from basal ionic levels. Nevertheless, such properties often result in poor readouts upon ion binding, frequently result in low ion specificity, and do not allow the detection of a wide range of concentrations. Herein, we show the design, synthesis, characterization, and implementation of a Zn-probe developed for MRI that possesses reversible Zn-binding properties with a rapid dissociation rate ( = 845 ± 35 s) for the detection of a wide range of biologically relevant concentrations. Read More

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SAPT, a Fast and Efficient Approach for Simultaneous Profiling of Protein N- and C-Terminome.

Anal Chem 2021 Aug 23;93(30):10553-10560. Epub 2021 Jul 23.

Shanghai Cancer Center and Institutes of Biomedical Sciences, Fudan University, Shanghai 200032, P. R. China.

Protein termini play pivotal roles in various biological processes. Although several terminomic strategies have been proposed for the analysis of protein N-termini or protein C-termini separately, few can analyze both ends of proteins at the same time. Herein, we developed a workflow, termed Simultaneous Analysis of Protein N- and C-Terminome (SAPT) based on strong cation exchange chromatography (SCX) fractionation. Read More

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The influence of the crowding assumptions in biofilm simulations.

PLoS Comput Biol 2021 Jul 22;17(7):e1009158. Epub 2021 Jul 22.

Laboratory of Computational Systems Biotechnology, École Polytechnique Fédérale de Lausanne, EPFL, Lausanne, Switzerland.

Microorganisms are frequently organized into crowded structures that affect the nutrients diffusion. This reduction in metabolite diffusion could modify the microbial dynamics, meaning that computational methods for studying microbial systems need accurate ways to model the crowding conditions. We previously developed a computational framework, termed CROMICS, that incorporates the effect of the (time-dependent) crowding conditions on the spatio-temporal modeling of microbial communities, and we used it to demonstrate the crowding influence on the community dynamics. Read More

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"COVID Toes" in Three Siblings.

Henry M Feder

Pediatr Infect Dis J 2021 Jul 20. Epub 2021 Jul 20.

From the Connecticut Children's Medical Center and University of Connecticut Health Center, Hartford and Farmington, Connecticut.

Dermatologists reported an outbreak of pernio (red to purple swollen painful toes) during the COVID-19 pandemic. Most subjects lacked positive CoV-19 polymerase chain reaction (PCR) or antibodies or a preceding illness. The dermatologists termed the illness "COVID toes. Read More

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A Novel Luminescent "Nanochip" as a Tandem Catalytic System for Chemiluminescent Detection of Sweat Glucose.

Anal Chem 2021 Aug 22;93(30):10593-10600. Epub 2021 Jul 22.

National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Chemistry and Biomedicine Innovation Center, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing 210093, China.

Accurate sweat glucose detection is a promising alternative to invasive finger-prick blood tests, allowing for self-monitoring of blood glucose with good patient compliance. In this study, we have developed a tandem catalytic system, termed as a luminescent "nanochip" (LAON), which was composed of gold nanoparticles (AuNPs) and -(aminobutyl)--(ethylisoluminol) (ABEI)-engineered oxygen-doped carbon nitride (O-g-CN), for chemiluminescent detection of sweat glucose. The LAON exhibits dual catalytic activity of glucose oxidase and peroxidase and can not only oxidize glucose to generate HO but catalyze HO-mediated luminol chemiluminescence, resulting in sensitive detection of glucose. Read More

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Signal-averaged resting sympathetic transduction of blood pressure: is it time to account for prevailing muscle sympathetic burst frequency?

Am J Physiol Regul Integr Comp Physiol 2021 07 21. Epub 2021 Jul 21.

Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada.

Calculating the blood pressure (BP) response to a burst of muscle sympathetic nerve activity (MSNA), termed sympathetic transduction, may be influenced by an individual's resting burst frequency. We examined the relationships between sympathetic transduction and MSNA in 107 healthy males and females and developed a normalized sympathetic transduction metric to incorporate resting MSNA. Burst-triggered signal-averaging was used to calculate the peak diastolic BP response following each MSNA burst (sympathetic transduction of BP) and following incorporation of MSNA burst cluster patterns and amplitudes (sympathetic transduction slope). Read More

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Chemical screen identifies diverse and novel HDAC inhibitors as repressors of NUT function: implications for NUT carcinoma pathogenesis and treatment.

Mol Cancer Res 2021 Jul 20. Epub 2021 Jul 20.

Department of Pathology, Brigham and Women's Hospital, Harvard Medical School

NUT carcinoma (NC), characterized most commonly by the BRD4-NUTM1 fusion, is a rare, aggressive variant of squamous carcinoma with no effective treatment. BRD4-NUT drives growth and maintains the poorly differentiated state of NC by activating pro-growth genes such as MYC, through the formation of massive, hyperacetylated, super-enhancer-like domains termed megadomains. BRD4-NUT-mediated hyperacetylation of chromatin is facilitated by the chromatin-targeting tandem bromodomains of BRD4, combined with NUT, which recruits the histone acetyltransferase, p300. Read More

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Construction of genome-wide protein tagging cell and mouse libraries.

Yi Chuan 2021 Jul;43(7):704-714

Genome Tagging Project Center, Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai 200031, China.

Mice are the most widely used model organism for the study of gene functions and disease mechanisms through the generation of gene-modified mice. Since the 1980s, different genetic manipulation technologies have been developed to reveal gene functions in vivo, including homologous recombination strategies mediated by embryonic stem cells, transgenic strategies mediated by gametes, and the latest genetic modification strategies based on CRISPR/Cas9 technology. Semi-cloning technology mediated by "artificial spermatids" (androgenetic haploid embryonic stem cells, also termed sperm-like stem cells) is developed by Chinese scientists in 2012. Read More

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A Biomedical Knowledge Graph System to Propose Mechanistic Hypotheses for Real-World Environmental Health Observations: Cohort Study and Informatics Application.

JMIR Med Inform 2021 Jul 20;9(7):e26714. Epub 2021 Jul 20.

Renaissance Computing Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States.

Background: Knowledge graphs are a common form of knowledge representation in biomedicine and many other fields. We developed an open biomedical knowledge graph-based system termed Reasoning Over Biomedical Objects linked in Knowledge Oriented Pathways (ROBOKOP). ROBOKOP consists of both a front-end user interface and a back-end knowledge graph. Read More

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Collaborative Equilibrium Coupling of Catalytic DNA Nanostructures Enables Programmable Detection of SARS-CoV-2.

Adv Sci (Weinh) 2021 Jul 18:e2101155. Epub 2021 Jul 18.

Institute for Health Innovation & Technology, National University of Singapore, Singapore, 117599, Singapore.

Accessible and adaptable nucleic acid diagnostics remains a critical challenge in managing the evolving COVID-19 pandemic. Here, an integrated molecular nanotechnology that enables direct and programmable detection of SARS-CoV-2 RNA targets in native patient specimens is reported. Termed synergistic coupling of responsive equilibrium in enzymatic network (SCREEN), the technology leverages tunable, catalytic molecular nanostructures to establish an interconnected, collaborative architecture. Read More

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Reliable generation of glial enriched progenitors from human fibroblast-derived iPSCs.

Stem Cell Res 2021 Jul 7;55:102458. Epub 2021 Jul 7.

Department of Neurology, David Geffen School of Medicine at UCLA, USA. Electronic address:

White matter stroke (WMS) occurs as small infarcts in deep penetrating blood vessels in the brain and affects the regions of the brain that carry connections, termed the subcortical white matter. WMS progresses over years and has devastating clinical consequences. Unlike large grey matter strokes, WMS disrupts the axonal architecture of the brain and depletes astrocytes, oligodendrocyte lineage cells, axons and myelinating cells, resulting in abnormalities of gait and executive function. Read More

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