4,007 results match your criteria resistant classical


Discovery and development of macrolides as anticancer agents.

Curr Top Med Chem 2021 Jul 27. Epub 2021 Jul 27.

Department of Emergency, Zhuji People's Hospital of Zhejiang Province, Zhuji, China.

Cancer is a life-threatening destructive disease. In the past several decades, the incidence of cancer has been dramatically increased mostly due to lifestyle changes. Chemotherapy plays an important role in the treatment of cancer, but the development of resistance against chemotherapeutic agents, the side effects, and non-specific toxicity threatens the efficiency of anticancer agents. Read More

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Articular Cartilage Friction, Strain, and Viability Under Physiological to Pathological Benchtop Sliding Conditions.

Cell Mol Bioeng 2021 Aug 27;14(4):349-363. Epub 2021 Apr 27.

University of Delaware (Department of Biomedical Engineering), Newark, DE USA.

, articular cartilage is exceptionally resistant to wear, damage, and dysfunction. However, replicating cartilage's phenomenal tribomechanics (i.e. Read More

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Structure-based approaches for drug discovery against .

Comput Struct Biotechnol J 2021 24;19:3708-3719. Epub 2021 Jun 24.

Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom.

is the causative agent of TB and was estimated to cause 1.4 million death in 2019, alongside 10 million new infections. Drug resistance is a growing issue, with multi-drug resistant infections representing 3. Read More

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Treatment Strategies for Dopamine Agonist-Resistant and Aggressive Prolactinomas: A Comprehensive Analysis of the Literature.

Horm Metab Res 2021 Jul 19;53(7):413-424. Epub 2021 Jul 19.

Department of Neurosurgery, Acibadem Hospital, Maslak, Istanbul, Turkey.

Despite most of the prolactinomas can be treated with endocrine therapy and/or surgery, a significant percentage of these tumors can be resistant to endocrine treatments and/or recur with prominent invasion into the surrounding anatomical structures. Hence, clinical, pathological, and molecular definitions of aggressive prolactinomas are important to guide for classical and novel treatment modalities. In this review, we aimed to define molecular endocrinological features of dopamine agonist-resistant and aggressive prolactinomas for designing future multimodality treatments. Read More

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Targeting intracellular WT1 in AML with a novel RMF-peptide-MHC specific T-cell bispecific antibody.

Blood 2021 Jul 19. Epub 2021 Jul 19.

German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ), Heidelberg, Germany.

Antibody-based immunotherapy is a promising strategy for targeting chemo-resistant leukemic cells. However, classical antibody-based approaches are restricted to targeting lineage-specific cell-surface antigens. By targeting intracellular antigens, a large number of other leukemia-associated targets would become accessible. Read More

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Insulin action at a molecular level - 100 years of progress.

Mol Metab 2021 Jul 15:101304. Epub 2021 Jul 15.

Joslin Diabetes Center, Harvard Medical School, Boston, MA 02215.

The discovery of insulin 100 years ago and its application to the treatment of human disease marked a major turning point in the history of medicine. With the availability of purified insulin, its physiological role for the regulation of blood glucose and ketones was established; its amino acid sequence was determined, and its structure was solved. Over the last 50 years, the function of insulin was integrated with the discovery of the insulin receptor and its signaling cascade to reveal the role of impaired insulin signaling-or resistance-in the progression of type 2 diabetes. Read More

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Enhancing artemisinin content in and delivery from Artemisia annua: a review of alternative, classical, and transgenic approaches.

Planta 2021 Jul 15;254(2):29. Epub 2021 Jul 15.

Department of Botany, Aligarh Muslim University, Aligarh, 202 002, India.

Main Conclusion: This review analyses the most recent scientific research conducted for the purpose of enhancing artemisinin production. It may help to devise better artemisinin enhancement strategies, so that its production becomes cost effective and becomes available to masses. Malaria is a major threat to world population, particularly in South-East Asia and Africa, due to dearth of effective anti-malarial compounds, emergence of quinine resistant malarial strains, and lack of advanced healthcare facilities. Read More

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Porous Silicon Carbide (SiC): A Chance for Improving Catalysts or Just Another Active-Phase Carrier?

Chem Rev 2021 Jul 13. Epub 2021 Jul 13.

Institute of Chemistry and Processes for Energy, Environment and Health (ICPEES), ECPM, UMR 7515 of the CNRS-University of Strasbourg, 25 rue Becquerel, 67087 Strasbourg Cedex 02, France.

There is an obvious gap between efforts dedicated to the control of chemicophysical and morphological properties of catalyst active phases and the attention paid to the search of new materials to be employed as functional carriers in the upgrading of heterogeneous catalysts. Economic constraints and common habits in preparing heterogeneous catalysts have narrowed the selection of active-phase carriers to a handful of materials: oxide-based ceramics ( AlO, SiO, TiO, and aluminosilicates-zeolites) and carbon. However, these carriers occasionally face chemicophysical constraints that limit their application in catalysis. Read More

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Rational approaches towards inorganic and organometallic antibacterials.

Authors:
Jeannine Hess

Biol Chem 2021 Jul 13. Epub 2021 Jul 13.

Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK.

The occurrence of drug-resistant bacteria is drastically rising and new and effective antibiotic classes are urgently needed. However, most of the compounds in development are minor modifications of previously used drugs to which bacteria can easily develop resistance. The investigation of inorganic and organometallic compounds as antibiotics is an alternative approach that holds great promises due to the ability of such molecules to trigger metal-specific mechanisms of action, which results in lethal consequences for pathogens. Read More

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Antimicrobial Peptides Derived From Insects Offer a Novel Therapeutic Option to Combat Biofilm: A Review.

Front Microbiol 2021 10;12:661195. Epub 2021 Jun 10.

Centre of Environment, Climate Change and Public Health, RUSA 2.0, Utkal University, Vani Vihar, Bhubaneswar, India.

Biofilms form a complex layer with defined structures, that attach on biotic or abiotic surfaces, are tough to eradicate and tend to cause some resistance against most antibiotics. Several studies confirmed that biofilm-producing bacteria exhibit higher resistance compared to the planktonic form of the same species. Antibiotic resistance factors are well understood in planktonic bacteria which is not so in case of biofilm producing forms. Read More

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Protein Dynamics and Substrate Protonation States Mediate the Catalytic Action of -4-Hydroxy-l-Proline Dehydratase.

J Phys Chem B 2021 Jul 8;125(28):7774-7784. Epub 2021 Jul 8.

Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.

The enzyme -4-hydroxy-l-proline (Hyp) dehydratase (HypD) is among the most abundant glycyl radical enzymes (GREs) in the healthy human gut microbiome and is considered a promising antibiotic target for the prominent antibiotic-resistant pathogen . Although an enzymatic mechanism has been proposed, the role of the greater HypD protein environment in mediating radical reactivity is not well understood. To fill this gap in understanding, we investigate HypD across multiple time- and length-scales using electronic structure modeling and classical molecular dynamics. Read More

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Exploring the sequence features determining amyloidosis in human antibody light chains.

Sci Rep 2021 Jul 2;11(1):13785. Epub 2021 Jul 2.

Protein Bioinformatics Lab, Department of Biotechnology, Bhupat and Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai, 600036, Tamil Nadu, India.

The light chain (AL) amyloidosis is caused by the aggregation of light chain of antibodies into amyloid fibrils. There are plenty of computational resources available for the prediction of short aggregation-prone regions within proteins. However, it is still a challenging task to predict the amyloidogenic nature of the whole protein using sequence/structure information. Read More

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Bioluminescent pv. as a Tool to Quantify Bacteria , Screen Germplasm, and Identify Infection Routes on Leaf Surfaces.

Front Plant Sci 2021 15;12:667351. Epub 2021 Jun 15.

Department of Horticulture and Crop Science, Ohio Agricultural Research and Development Center, The Ohio State University, Wooster, OH, United States.

Imaging technology can provide insight into biological processes governing plant-pathogen interactions. We created and used a bioluminescent strain of pv. (Xg) to quantify infection processes in plants using tomato as a model. Read More

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Stem Cells in the Exocrine Pancreas during Homeostasis, Injury, and Cancer.

Cancers (Basel) 2021 Jun 30;13(13). Epub 2021 Jun 30.

Laboratory for Experimental Oncology and Radiobiology, Center for Experimental and Molecular Medicine, Cancer Center Amsterdam and Amsterdam Gastroenterology Endocrinology and Metabolism, Amsterdam University Medical Centers, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands.

Cell generation and renewal are essential processes to develop, maintain, and regenerate tissues. New cells can be generated from immature cell types, such as stem-like cells, or originate from more differentiated pre-existing cells that self-renew or transdifferentiate. The adult pancreas is a dormant organ with limited regeneration capacity, which complicates studying these processes. Read More

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Basics for Improved Use of Phages for Therapy.

Antibiotics (Basel) 2021 Jun 16;10(6). Epub 2021 Jun 16.

Department of Comprehensive Dentistry, The University of Texas Health Center, San Antonio, TX 78229-3900, USA.

Blood-borne therapeutic phages and phage capsids increasingly reach therapeutic targets as they acquire more persistence, i.e., become more resistant to non-targeted removal from blood. Read More

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Benchmarking DNA Extraction Methods for Phylogenomic Analysis of Sub-Antarctic and Species.

Microorganisms 2021 Jun 9;9(6). Epub 2021 Jun 9.

Tasmanian Institute of Agriculture, University of Tasmania, Hobart, TAS 7005, Australia.

Bacteria containing mycolic acids in their cell envelope are often recalcitrant to cell lysis, so extracting DNA of sufficient quality for third-generation sequencing and high-fidelity genome assembly requires optimization, even when using commercial kits with protocols for hard-to-lyse bacteria. We benchmarked three spin-column-based kits against a classical DNA extraction method employing lysozyme, proteinase K and SDS for six lysozyme-resistant, sub-Antarctic strains of . Prior cultivation in broths containing glycine at highly growth-inhibitory concentrations (4. Read More

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Zinc Oxide Nanoparticles Can Intervene in Radiation-Induced Senescence and Eradicate Residual Tumor Cells.

Cancers (Basel) 2021 Jun 15;13(12). Epub 2021 Jun 15.

Department of Otorhinolaryngology, University Medical Center Mainz, Langenbeckstrasse 1, 55131 Mainz, Germany.

Despite recent advancements in tumor therapy, metastasis and tumor relapse remain major complications hindering the complete recovery of many cancer patients. Dormant tumor cells, which reside in the body, possess the ability to re-enter the cell cycle after therapy. This phenomenon has been attributed to therapy-induced senescence. Read More

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Enhanced Antibacterial Activity of Extract against Multidrug-Resistant through Niosome Encapsulation.

Nanomaterials (Basel) 2021 Jun 15;11(6). Epub 2021 Jun 15.

Laboratory for Biointerfaces, Empa, Swiss Federal Laboratories for Materials Science and Technology, 9014 St. Gallen, Switzerland.

With the increased occurrence of antibiotic-resistant bacteria, alternatives to classical antibiotics are urgently needed for treatment of various infectious diseases. Medicinal plant extracts are among the promising candidates due to their bioactive components. The aim of this study was to prepare niosome-encapsulated extract and study its efficacy against multidrug-resistant strains. Read More

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Prevalence of Antibiotic Resistance of ESKAPE Pathogens Over Five Years in an Infectious Diseases Hospital from South-East of Romania.

Infect Drug Resist 2021 24;14:2369-2378. Epub 2021 Jun 24.

Clinical Medical Department, Faculty of Medicine and Pharmacy, "Dunărea de Jos" University, Galati, Romania.

Purpose: This study aimed at identifying the main antimicrobial resistance of ESKAPE () pathogens in a Romanian infectious diseases hospital. This antimicrobial resistance is a global threat, having high rates of multidrug resistance and limited treatment options.

Patients And Methods: This retrospective study (2016-2020) assessed the antimicrobial resistance of ESKAPE pathogens isolated from the patient's biological samples. Read More

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Absence of methicillin-resistant Staphylococcus aureus colonization among immunocompetent healthy adults: Insights from a longitudinal study.

PLoS One 2021 30;16(6):e0253739. Epub 2021 Jun 30.

Laboratory of Molecular Microbiology of Human Pathogens, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal.

Methicillin-resistant Staphylococcus aureus (MRSA) has long been known as a major cause of hospital-acquired (HA-MRSA) infections worldwide. For the past twenty years, an increasing number of studies have described its emergence in the community as well. In Portugal, a country with a high-prevalence of HA-MRSA, there are only limited data available on the epidemiology of MRSA in the community. Read More

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Stereotactic EEG-guided radiofrequency thermocoagulation versus anterior temporal lobectomy for mesial temporal lobe epilepsy with hippocampal sclerosis: study protocol for a randomised controlled trial.

Trials 2021 Jun 29;22(1):425. Epub 2021 Jun 29.

Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, No. 45, Changchun Street, Xuanwu District, Beijing, 100053, China.

Introduction: In this report, we aim to describe the design for the randomised controlled trial of Stereotactic electroencephalogram (EEG)-guided Radiofrequency Thermocoagulation versus Anterior Temporal Lobectomy for Mesial Temporal Lobe Epilepsy with Hippocampal Sclerosis (STARTS). Mesial temporal lobe epilepsy (mTLE) is a classical subtype of temporal lobe epilepsy that often requires surgical intervention. Although anterior temporal lobectomy (ATL) remains the most popular treatment for mTLE, accumulating evidence has indicated that ATL can cause tetartanopia and memory impairments. Read More

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An Organogold Compound as Potential Antimicrobial Agent against Drug-Resistant Bacteria: Initial Mechanistic Insights.

ChemMedChem 2021 Jun 28. Epub 2021 Jun 28.

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

The rise of antimicrobial resistance has necessitated novel strategies to efficiently combat pathogenic bacteria. Metal-based compounds have been proven as a possible alternative to classical organic drugs. Here, we have assessed the antibacterial activity of seven gold complexes of different families. Read More

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Controlling Peptide Function by Directed Assembly Formation: Mechanistic Insights Using Multiscale Modeling on an Antimicrobial Peptide-Drug-Membrane System.

ACS Omega 2021 Jun 11;6(24):15756-15769. Epub 2021 Jun 11.

Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, H-1117 Budapest, Hungary.

Owing to their potential applicability against multidrug-resistant bacteria, antimicrobial peptides (AMPs) or host defense peptides (HDPs) gain increased attention. Besides diverse immunomodulatory roles, their classical mechanism of action mostly involves membrane disruption of microbes. Notably, their unbalanced overexpression has also been associated with host cell cytotoxicity in various diseases. Read More

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Prevalence and characterization of Staphylococcus aureus and methicillin-resistant Staphylococcus aureus isolated from retail yak butter in Tibet, China.

J Dairy Sci 2021 Jun 24. Epub 2021 Jun 24.

College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China. Electronic address:

This study aimed to investigate the prevalence, molecular characteristics and antibiotic resistance of Staphylococcus aureus isolates from yak butter in Tibet, China. A total of 218 yak butter samples were collected from retail stores in Tibet and screened for Staph. aureus. Read More

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Emerging photothermal-derived multimodal synergistic therapy in combating bacterial infections.

Chem Soc Rev 2021 Jun 23. Epub 2021 Jun 23.

Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering (IBME), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China. and State Key Laboratory of Organic Electronics and Information Displays (SKLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing 210023, China and Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), Nanjing 211816, China.

Due to the emerging bacterial resistance and the protection of tenacious biofilms, it is hard for the single antibacterial modality to achieve satisfactory therapeutic effects nowadays. In recent years, photothermal therapy (PTT)-derived multimodal synergistic treatments have received wide attention and exhibited cooperatively enhanced bactericidal activity. PTT features spatiotemporally controllable generation of hyperthermia that could eradicate bacteria without inducing resistance. Read More

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The immune cell landscape of peripheral blood mononuclear cells from PNS patients.

Sci Rep 2021 Jun 22;11(1):13083. Epub 2021 Jun 22.

Department of clinical laboratory, The Children's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child Health, 3333 Binsheng Road, Hangzhou, 310003, Zhejiang, China.

Existing research suggests that the human immune system and immune cells are involved in the pathogenesis of nephrotic syndrome, but there is still a lack of direct evidence. This study tried to analyze the profiling of immune cells in the peripheral blood of steroid-sensitive nephrotic syndrome (SSNS) patients and steroid-resistant nephrotic syndrome (SRNS) patients before and after standard steroid treatment to clarify the immunological mechanism of nephrotic syndrome patients. The number and proportion of CD4 + T cells in patients with nephrotic syndrome remained unchanged. Read More

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Draft genome sequences of two hypermucoviscous carbapenem-resistant ST25 Klebsiella pneumoniae strains causing respiratory and systemic infections.

J Glob Antimicrob Resist 2021 Jun 18;26:174-176. Epub 2021 Jun 18.

Laboratory of Immunobiotechnology, Reference Centre for Lactobacilli (CERELA-CONICET), Tucumán, Argentina; Food and Feed Immunology Group, Laboratory of Animal Food Function, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan. Electronic address:

Objectives: The emergence and spread of hypermucoviscous KPC-2-producing Klebsiella pneumoniae strains belonging to the sequence type 25 (ST25) clone was reported recently in Northwest Argentina as a leading cause of nosocomial infections. The aim of this work was to perform whole-genome sequencing (WGS) to analyse antimicrobial resistance genes (ARGs), virulence factors and colonisation-associated genes in two carbapenem-resistant KPC-2-producing ST25 K. pneumoniae strains isolated from hospitalised patients. Read More

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Synergistic effect and antibiofilm activity of an antimicrobial peptide with traditional antibiotics against multi-drug resistant bacteria.

Microb Pathog 2021 Jun 18;158:105056. Epub 2021 Jun 18.

Institute of Evolution & Marine Biodiversity and Department of Marine Biology, Ocean University of China, Qingdao, 266003, China; Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266003, China. Electronic address:

Combined treatment of AMPs with classical antibiotics has gained interest because it often results in a synergistic antibacterial effect. We demonstrated here that Pt5-1c, an AMP derived from phosvitin, had antibacterial activity against the MDR bacteria (S. aureus USA500, E. Read More

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High-resolution genetic mapping reveals cis-regulatory and copy number variation in loci associated with cytochrome P450-mediated detoxification in a generalist arthropod pest.

PLoS Genet 2021 Jun 21;17(6):e1009422. Epub 2021 Jun 21.

Laboratory of Agrozoology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.

Chemical control strategies are driving the evolution of pesticide resistance in pest populations. Understanding the genetic mechanisms of these evolutionary processes is of crucial importance to develop sustainable resistance management strategies. The acaricide pyflubumide is one of the most recently developed mitochondrial complex II inhibitors with a new mode of action that specifically targets spider mite pests. Read More

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Characterization of V. cholerae O1 biotype El Tor serotype Ogawa possessing the ctxB gene of the classical biotype isolated from well water associated with the cholera outbreak in Kerala, South India.

J Water Health 2021 Jun;19(3):478-487

Microbiology Fermentation and Biotechnology Division, ICAR-Central Institute of Fisheries Technology, Kochi, India.

We investigated 22 water samples (17 well water and five pipe water - both chlorinated) and six soil samples from the surroundings of wells of the households of suspected patients from Palakkad district, Kerala (India), from where a cholera outbreak was reported during June-July 2016. A total of 25 Vibrio cholerae isolates were collected from three well water samples during a recent cholera outbreak. Biochemical and serological studies revealed that all of the isolates belonged to serogroup O1, biotype El Tor, serotype Ogawa. Read More

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