2,316 results match your criteria: "Institute of Microbiology and Immunology[Affiliation]"

O-antigen of uropathogenic Escherichia coli is required for induction of neutrophil extracellular traps.

J Microbiol Immunol Infect

December 2024

Institute of Molecular Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan; Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan. Electronic address:

Background: Urinary tract infections (UTIs) are prevalent bacterial infection, with uropathogenic Escherichia coli (UPEC) as the primary causative agent. The outer membrane of UPEC contains a lipopolysaccharide (LPS), which plays crucial roles in the host's immune response to infection. Neutrophils use neutrophil extracellular traps (NETs) are mechanism by which neutrophils defend against bacterial infections.

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Objective: Aim: To determine the signs of society's readiness to legalize euthanasia for palliative patients by interviewing both the patients themselves and their relatives (caregivers) and specialists who provide medical, psychological, social and spiritual services at the end-of-life.

Patients And Methods: Materials and Methods: The study was carried out using a sociological method among palliative patients of three regions of Ukraine (Lviv, Kyiv and Kharkiv) on a random sample of 377 people surveyed during 2022-2024. The conducted research confirmed and clarified the previous results with greater reliability.

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Sexually transmitted shigellosis.

Acta Dermatovenerol Alp Pannonica Adriat

December 2024

Institute of Microbiology and Immunology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia.

Shigellae can be transmitted through sexual contact, especially among gay, bisexual, and other men who have sex with men (gbMSM). The dynamics and factors contributing to sexual transmission of shigellosis are not yet fully understood. Shigella spp.

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Broth microdilution protocol for determining antimicrobial susceptibility of Legionella pneumophila to clinically relevant antimicrobials.

J Microbiol Methods

December 2024

Medical Microbiology, Division of Infection and Immunity, Cardiff University, Cardiff, UK; UK Health Security Agency, Bacteriology Reference Department, London, UK. Electronic address:

Currently there is no detailed, internationally agreed protocol defined to evaluate antimicrobial susceptibility testing (AST) for Legionella pneumophila (required to establish epidemiological cut-off value or "ECOFF" boundaries); therefore, antimicrobial resistance in these isolates cannot be defined. AST methods utilising media containing activated charcoal as an ingredient, to enable Legionella growth, are unreliable as noted in an internationally authored opinion paper and a new gold standard is required. Here we define a detailed protocol for broth microdilution (BMD) using defined cell culture collection-deposited control reference strains (Philadelphia-1 and Knoxville-1) as well as two accessible reference strains with moderately (lpeAB-carrying) and markedly (23S rRNA mutation-carrying) elevated azithromycin minimum inhibitory concentration (MIC).

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Antibiofilm Effects of Novel Compounds in Otitis Media Treatment: Systematic Review.

Int J Mol Sci

November 2024

Institute of Microbiology and Immunology, Faculty of Medicine, University of Belgrade, Dr Subotica 1, 11000 Belgrade, Serbia.

Otitis media (OM) is a frequent disease with incidence rate of 5300 cases per 100,000 people. Recent studies showed that polymicrobial biofilm formation represents a significant pathogenic mechanism in recurrent and chronic forms of OM. Biofilm enables bacteria to resist antibiotics that would typically be recommended in guidelines, contributing to the ineffectiveness of current antimicrobial strategies.

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Role of Oxidative Stress and Inflammation in Postoperative Complications and Quality of Life After Laryngeal Cancer Surgery.

Cells

November 2024

Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Dr Subotica 1, P.O. Box 38, 11129 Belgrade, Serbia.

(1) Background: Laryngeal surgery due to carcinoma leads to significant tissue disruption, cellular injury, and inflammation. This leads to increased levels of reactive oxygen species (ROS), causing oxidative damage that can influence quality of life (QOL) and recovery and complicate the postoperative course. The aim of this study was to compare how postoperative quality of life and surgical complication occurrence interacted with the biomarker levels of oxidative stress (malondialdehyde, MDA; superoxide dismutase, SOD; glutathione peroxidase 1, GPX1; and catalase, CAT) and inflammation (interleukin 1, IL-1; interleukin 6, IL-6; C-reactive protein, CRP) in patients treated with conservative and radical laryngeal surgery.

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The hypothesis that the antibacterial effect of copper depends on its state was tested. It was studied the antibacterial effect of copper applied to the fabric, copper in chelated and free (ionic) forms on the growth intensity of and in the system after a single or "primary" contact. Classical microbiology methods were used.

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In dentistry, disinfection with antimicrobials is employed under different conditions and at different time points. During the COVID-19 pandemic, the use of disinfectant dental sprays was proposed, among other measures, to help prevent the transmission of infections during dental procedures that require highly effective antiseptics at particularly short contact times. The study aimed to evaluate the efficacy of electrolyzed saline (EOS) compared with other antiseptics in terms of the spread of enveloped and nonenveloped viruses by ultrasonic scaler (USS)-generated dental spray.

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Acute Human Bocavirus 1 Infection in Children Hospitalized for Acute Bronchiolitis: A 2-Year Prospective Study.

Pediatr Infect Dis J

December 2024

From the Institute of Microbiology and Immunology, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia.

Background: The objective of this prospective study was to assess the proportion and clinical consequences of human bocavirus 1 (HBoV1) replication in children hospitalized for acute bronchiolitis (AB) with HBoV1 DNA in the nasopharynx (NP).

Methods: For this purpose, we detected HBoV1 DNA and mRNA (evidence of viral replication and viable virus) in NP in cases and healthy control children. This research allowed us to distinguish active HBoV1 infections from inactive ones.

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Background: The progression of liver cancer is a complicated process that involves genetic and epigenetic changes. Paired box 6 (PAX6) is a critical transcription factor for embryonic development. PAX6 is abnormally methylated in human cancer.

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Dynamics of West Nile Virus Lineage 2 Spread in the Balkans in the Context of Global Spatio-Temporal Dispersal.

J Med Virol

December 2024

Department of Virology, Institute of Microbiology and Immunology, Faculty of Medicine, University of Belgrade, Belgrade, Serbia.

West Nile Virus (WNV) is considered one of the most widely distributed arboviruses worldwide. In 2018, Serbia was among the European countries reporting the highest number of WNV cases. This study aimed to characterize WNV strains circulating in Serbia, and to estimate the pathways and dynamics of WNV-2 spread in the Balkans and globally through the phylogenetic approach.

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Colorectal cancer (CRC) is one of the most common types of cancer worldwide. In addition to known risk factors, oncoviruses have attracted exceptional attention from recent research. Numerous hypotheses on interactions between the Epstein-Barr virus (EBV) and Human papillomavirus (HPV) in CRC are still based on sparse prevalence data of these coinfections.

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Frontiers in pancreatic cancer on biomarkers, microenvironment, and immunotherapy.

Cancer Lett

February 2025

Department of Medicine, Sanford Stem Cell Institute, and Moores Cancer Center, University of California San Diego, La Jolla, CA, 92093, USA. Electronic address:

Article Synopsis
  • * Promising biomarkers like microRNAs and circulating tumor DNA enhance early diagnosis when used alongside multi-omics panels; the tumor microenvironment (TME) plays a role in therapy resistance through components like cancer-associated fibroblasts and immune cells.
  • * The integration of artificial intelligence in analyzing complex data is explored for personalized treatment approaches, with a call for future research on biomarker validation, AI regulations, and fair access to innovative therapies.
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Article Synopsis
  • * A total of 18 carbapenemase variants were identified, predominantly in ST131 clades A and C, with the most common variants being detected in 14 and 12 countries, respectively.
  • * The rise in isolates carrying these genes since 2021 highlights a significant public health threat posed by the high-risk ST131 lineage.
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Fibroblastic reticular cells generate protective intratumoral T cell environments in lung cancer.

Cell

November 2024

Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen 9007, Switzerland; University Heart Center, University Hospital Zurich and University of Zurich, Zurich 8091, Switzerland; Center for Translational and Experimental Cardiology, University Hospital Zurich and University of Zurich, Zurich 8091, Switzerland. Electronic address:

Stringent control of T cell activity in the tumor microenvironment is essential for the generation of protective antitumor immunity. However, the identity, differentiation, and functions of the cells that create critical fibroblastic niches promoting tumor-infiltrating T cells remain elusive. Here, we show that CCL19-expressing fibroblastic reticular cells (FRCs) generate interconnected T cell environments (TEs) in human non-small cell lung cancer, including tertiary lymphoid structures and T cell tracks.

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Molecular characterization of colistin-resistant Klebsiella pneumoniae isolates and their conjugative mcr-carrying plasmids.

J Infect Public Health

December 2024

Division of Nephrology, Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan. Electronic address:

Background: This study aimed to characterize colistin-resistant K. pneumoniae (CoRKp) strains isolated from patients with urinary tract infections and bacteremia between 1999 and 2022 at a tertiary teaching hospital in Taiwan.

Methods: A total of 1966 K.

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Invariant natural killer T (iNKT) cells are a subset of innate T cells displaying powerful immunomodulatory functions. Despite extensive preclinical research on the use of iNKT agonist and antagonist for various diseases, translating these findings into successful clinical applications has proven challenging, leaving no approved treatments to date. Efforts to optimize therapeutic outcomes by developing alternative glycolipids to α-galactosylceramide (α-GalCer or KRN7000), the prototypical iNKT antigen, have shown improved preclinical results.

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MetaAll: integrative bioinformatics workflow for analysing clinical metagenomic data.

Brief Bioinform

September 2024

Institute of Microbiology and Immunology, Faculty of Medicine, University of Ljubljana, Zaloška cesta 4, 1000 Ljubljana, Slovenia.

Over the past decade, there have been many improvements in the field of metagenomics, including sequencing technologies, advances in bioinformatics and the development of reference databases, but a one-size-fits-all sequencing and bioinformatics pipeline does not yet seem achievable. In this study, we address the bioinformatics part of the analysis by combining three methods into a three-step workflow that increases the sensitivity and specificity of clinical metagenomics and improves pathogen detection. The individual tools are combined into a user-friendly workflow suitable for analysing short paired-end (PE) and long reads from metagenomics datasets-MetaAll.

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Recurrent respiratory papillomatosis (RRP) is caused by human papillomaviruses (HPV) 6 and 11, but the role of their genomic variants in the disease's clinical course is unclear. This study investigated whether long-term persistence of a particular HPV genotype, subtype or genomic variant influences the RRP clinical course. HPV genotyping was performed in paired baseline and follow-up RRP laryngeal tissue specimens of 59 patients.

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Article Synopsis
  • Melatonin has shown protective benefits against renal injury in animal studies, but the role of long noncoding RNAs (lncRNAs) in its signaling is not fully understood.
  • This study discovers that a specific lncRNA, called nuclear enriched abundant transcript 1 (1), is activated by melatonin, enhancing its expression through a process involving the BMAL1/CLOCK protein complex.
  • The findings suggest that melatonin encourages the growth of renal tubular epithelial cells (TECs) by regulating lncRNA 1, which in turn affects core clock genes and promotes recovery from kidney damage, indicating a new potential target for treating renal diseases.
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Purpose: The present study investigated the role of resistance-nodulation-cell division (RND) efflux pumps in tigecycline resistance of Acinetobacter baumannii clinical isolates recovered from three Western Balkan countries (Serbia, Bosnia and Herzegovina and Montenegro).

Methods: A total of 37 A. baumannii isolates recovered from seven tertiary care hospitals in 2016 and 2022 were tested against tigecycline using broth microdilution method.

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  • Arboviruses, specifically dengue virus serotype 2, can evolve rapidly through single nucleotide changes, leading to more severe outbreaks and replacement of existing virus strains.
  • A study in Taiwan between 2001 and 2003 tracked the evolution from early epidemic strain (Ia) to later strains (Ib and II), which had key amino acid mutations that increased replication efficiency at lower temperatures.
  • The findings reveal that a specific mutation in the NS5 protein boosts replication and virulence, enhancing our understanding of dengue outbreaks and helping predict future viral strains with greater epidemic potential.
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Case studies on the progress of cervical cancer screening programs in Bhutan, India, and Türkiye.

Vaccine

July 2024

Centre for Evaluation of Vaccination, Vaccine and Infectious Disease Institute, University of Antwerp, Belgium. Electronic address:

International stakeholders gathered in New Delhi, India, in December 2022 to share experiences on human papillomaviruses (HPV) prevention and control strategies. As part of a supplementary publication from the meeting proceedings, this paper describes secondary HPV prevention strategies highlighting the varying degrees of progress and challenges through case studies from Bhutan, India, and Türkiye. India has implemented national screening guidelines, primarily using visual inspection with acetic acid (VIA), but achieving a low coverage rate of 1.

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  • Kaposi's sarcoma-associated herpesvirus (KSHV) is responsible for diseases like Kaposi's Sarcoma and has a high prevalence in sub-Saharan Africa, making vaccine development critical, but existing challenges include the absence of viable animal models for KSHV infection.
  • The study created a chimeric mouse virus (MHV68-K-K8.1) to mimic KSHV infection and tested two K8.1 vaccines (mRNA-LNP and Ferritin nanoparticles) which successfully stimulated immune responses in mice.
  • Results showed that mice vaccinated with K8.1 mRNA LNP vaccines had reduced viral levels and reactivation rates of the surrogate virus, indicating the potential effectiveness of these
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Investigation of drug-microbial interactions has gained prominence due to the increasing need to study pharmacomicrobiomics. Previous research has revealed the microbiome's role in drug metabolism, influencing efficacy, bioavailability, and toxicity. Several potential interactions have reported between drugs and microbes, including bioaccumulation, biotransformation, and the influence of drugs on microbial growth.

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