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Germs Sep 2020spp. are members of the Enterobacteriaceae family and are Gram-negative, rod-shaped bacteria known to mainly cause urinary tract infections (UTIs) in humans. However,... (Review)
Review
spp. are members of the Enterobacteriaceae family and are Gram-negative, rod-shaped bacteria known to mainly cause urinary tract infections (UTIs) in humans. However, even though scarce evidence exists suggesting their potential to cause infective endocarditis (IE), a study summarizing the existing evidence is lacking. The purpose of this study was to systemically review all published cases of IE by species in the literature. A systematic review of PubMed, Scopus and Cochrane Library (through 5 May 2020) for studies providing epidemiological, clinical and microbiological data as well as data on treatment and outcomes of IE by species was performed. A total of 16 studies, containing data of 16 patients, were included. A prosthetic valve was present in 25%, while the most common causative pathogen was . Aortic valve was the most common infected site in 33.3%, followed by mitral valve in 26.7%. Diagnosis was set with transesophageal echocardiography in 37.5%, and transthoracic echocardiography in 25%, while the diagnosis was set at autopsy in 25%. Fever and sepsis were present in 100% and 84.6%, respectively. Aminoglycosides and cephalosporins were the most common antimicrobials used for treatment. Clinical cure was noted in 62.5%, while overall mortality was 43.8%. This systematic review describes IE by species in detail and provides information on epidemiology, clinical presentation, treatment and outcomes.
PubMed: 33134201
DOI: 10.18683/germs.2020.1209 -
Cold Spring Harbor Molecular Case... Jun 2020Proteus syndrome is a mosaic disorder that can cause progressive postnatal overgrowth of nearly any organ or tissue. To date, Proteus syndrome has been exclusively...
Proteus syndrome is a mosaic disorder that can cause progressive postnatal overgrowth of nearly any organ or tissue. To date, Proteus syndrome has been exclusively associated with the mosaic c.49G > A p.(Glu17Lys) pathogenic variant in , a variant that is also present in many cancers. Here we describe an individual with severe Proteus syndrome who died at 7.5 yr of age from combined parenchymal and restrictive pulmonary disease. Remarkably, this individual was found to harbor a mosaic c.49_50delinsAG p.(Glu17Arg) variant in at a variant allele fraction that ranged from <0.01 to 0.46 in fibroblasts established from an overgrown digit. This variant was demonstrated to be constitutively activating by phosphorylation of AKT(S473). These data document allelic heterogeneity for Proteus syndrome. We recommend that individuals with a potential clinical diagnosis of Proteus syndrome who are negative for the p.(Glu17Lys) variant be tested for other variants in .
Topics: Alleles; Allelic Imbalance; Amino Acid Substitution; Cervical Vertebrae; Genetic Association Studies; Genetic Heterogeneity; Genetic Predisposition to Disease; Genetic Testing; Humans; Infant; Magnetic Resonance Imaging; Male; Medical History Taking; Mutation; Phenotype; Proteus Syndrome; Proto-Oncogene Proteins c-akt; Radiography; Symptom Assessment
PubMed: 32327430
DOI: 10.1101/mcs.a005181 -
Frontiers in Cellular and Infection... 2022The human gut acts as the main reservoir of microbes and a relevant source of life-threatening infections, especially in immunocompromised patients. There, the...
The human gut acts as the main reservoir of microbes and a relevant source of life-threatening infections, especially in immunocompromised patients. There, the opportunistic fungal pathogen adapts to the host environment and additionally interacts with residing bacteria. We investigated fungal-bacterial interactions by coinfecting enterocytes with the yeast and the Gram-negative bacterium resulting in enhanced host cell damage. This synergistic effect was conserved across different isolates and occurred also with non- species and mutants defective in filamentation or candidalysin production. Using bacterial deletion mutants, we identified the hemolysin HpmA to be the key effector for host cell destruction. Spatially separated coinfections demonstrated that synergism between and is induced by contact, but also by soluble factors. Specifically, we identified -mediated glucose consumption and farnesol production as potential triggers for virulence. In summary, our study demonstrates that coinfection of enterocytes with and can result in increased host cell damage which is mediated by bacterial virulence factors as a result of fungal niche modification nutrient consumption and production of soluble factors. This supports the notion that certain fungal-bacterial combinations have the potential to result in enhanced virulence in niches such as the gut and might therefore promote translocation and dissemination.
Topics: Candida; Candida albicans; Coinfection; Enterocytes; Humans; Proteus mirabilis
PubMed: 35651758
DOI: 10.3389/fcimb.2022.866416 -
Translational Lung Cancer Research Nov 2023The tumor-resident microbiota in lung squamous cell carcinoma (LUSC) has been reported to be associated with the initiation and progression of cancer. And the gut...
BACKGROUND
The tumor-resident microbiota in lung squamous cell carcinoma (LUSC) has been reported to be associated with the initiation and progression of cancer. And the gut microbiome can modulate the efficacy of immunotherapies. However, it remains to be understood whether the tumor-resident microbiome promotes lymph node (LN) metastasis, which is important for clinical decision-making and prediction of a patient's prognosis. To investigate the potential role of tumor-resident microbiota in LN metastasis, we worked on the microbiota-geneset interaction profiles to characterize the molecular pathogenesis.
METHODS
RNA sequencing data and their matched clinical and genomic information were obtained from The Cancer Genome Atlas database. The matched microorganism quantification data were accessed via the cBioPortal database. The mutational signature analysis, transcriptome analysis, gene set enrichment analysis, immune infiltration, and microbiota-geneset network analysis were performed.
RESULTS
In this paper, we identified the tumor microbiota composition and microbial biomarkers in patients with and without LN metastases. In addition, significantly upregulated gene sets characterize the transcript profiles of patients with LN metastases, for example, Myc Targets, E2F Targets, G2M Checkpoint, Mitotic Spindle, DNA Repair, and Oxidative Phosphorylation. Finally, we found that and were strongly correlated with gene sets related to tumor development and energy metabolism in the networks of patients with LN metastases.
CONCLUSIONS
We found the associations between intratumor microbiota and transcripts. Our results shed light on the correlation network of and , which may serve as a novel strategy for modulating LN metastasis.
PubMed: 38090530
DOI: 10.21037/tlcr-23-357 -
Urologia Internationalis 2021Proteus mirabilis (PM) is a Gram-negative rod-shaped bacterium and widely exists in the natural environment, and it is most noted for its swarming motility and urease... (Review)
Review
Proteus mirabilis (PM) is a Gram-negative rod-shaped bacterium and widely exists in the natural environment, and it is most noted for its swarming motility and urease activity. PM is the main pathogen causing complicated urinary tract infections (UTIs), especially catheter-associated urinary tract infections. Clinically, PM can form a crystalline biofilm on the outer surface and inner cavity of the urethral indwelling catheter owing to its ureolytic biomineralization. This leads to catheter encrustation and blockage and, in most cases, is accompanied by urine retention and ascending UTI, causing cystitis, pyelonephritis, and the development of bladder or kidney stones, or even fatal complications such as septicemia and endotoxic shock. In this review, we discuss how PM is mediated by a catheter into the urethra, bladder, and then rose to the kidney causing UTI and the main virulence factors associated with different stages of infection, including flagella, pili or adhesins, urease, hemolysin, metal intake, and immune escape, encompassing both historical perspectives and current advances.
Topics: Catheter-Related Infections; Humans; Proteus Infections; Proteus mirabilis; Urinary Catheters; Urinary Tract Infections
PubMed: 33691318
DOI: 10.1159/000514097 -
Medicina (Kaunas, Lithuania) Feb 2022: and are related genera of opportunistic pathogens belonging to the family, often a cause of infections in the immunocompromised hosts, such as diabetic patients.... (Observational Study)
Observational Study
: and are related genera of opportunistic pathogens belonging to the family, often a cause of infections in the immunocompromised hosts, such as diabetic patients. Their clinical significance has increased due to their intrinsic resistance to polymyxins, which is often associated with acquired resistance mechanisms. In this study we evaluated the infections caused by and in two groups of patients, with diabetes (group 1) and without diabetes (group 2) admitted to the intensive care unit and surgical wards. The infections were investigated in terms of infection type, risk factors, clinical course, predictive factors for unfavourable outcomes and antibiotic resistance profile. : An observational, retrospective, cross-sectional study was conducted, comprising all patients infected with these pathogens. Bacterial identification and antibiotic sensitivity testing were performed using the Vitek2C automated system. : Comparison of the two groups showed that the statistically significant common infectious risk factors were found less frequently among diabetic patients when compared with non-diabetic patients, and that antimicrobial resistance was significantly lower in the diabetic patient group. However, survival rates did not differ between the two groups, drawing attention to the implications of diabetes as comorbidity. Additionally, with regard to the antibiotic resistance profile, 38.89% of strains isolated from diabetic patients belonged to the difficult-to-treat (DTR) phenotype, contributing to the severity of these infections compared with those caused by , of which 32% were wild type strains and 0% were DTR phenotype. The DTR/extended spectrum beta-lactamase producing isolates more than doubled the risk of mortality, while the presence of nasogastric nutrition tripled the risk. : infections that occurred in diabetic patients proved to be more difficult to treat, the majority of them being healthcare-associated bacteremias.
Topics: Cross-Sectional Studies; Diabetes Mellitus; Enterobacteriaceae Infections; Humans; Proteus Infections; Proteus mirabilis; Providencia; Retrospective Studies
PubMed: 35208593
DOI: 10.3390/medicina58020271 -
Clinical Trials (London, England) Jun 2022The assessment of patient-reported outcomes in clinical trials has enormous potential to promote patient-centred care, but for this potential to be realized, the...
BACKGROUND
The assessment of patient-reported outcomes in clinical trials has enormous potential to promote patient-centred care, but for this potential to be realized, the patient-reported outcomes must be captured effectively and communicated clearly. Over the past decade, methodologic tools have been developed to inform the design, analysis, reporting, and interpretation of patient-reported outcome data from clinical trials. We formed the PROTEUS-Trials Consortium (Patient-Reported Outcomes Tools: Engaging Users and Stakeholders) to disseminate and implement these methodologic tools.
METHODS
PROTEUS-Trials are engaging with patient, clinician, research, and regulatory stakeholders from 27 organizations in the United States, Canada, Australia, the United Kingdom, and Europe to develop both organization-specific and cross-cutting strategies for implementing and disseminating the methodologic tools. Guided by the Knowledge-to-Action framework, we conducted consortium-wide webinars and meetings, as well as individual calls with participating organizations, to develop a workplan, which we are currently executing.
RESULTS
Six methodologic tools serve as the foundation for PROTEUS-Trials dissemination and implementation efforts: the Standard Protocol Items: Recommendations for Interventional Trials-patient-reported outcome extension for writing protocols with patient-reported outcomes, the International Society for Quality of Life Research Minimum Standards for selecting a patient-reported outcome measure, Setting International Standards in Analysing Patient-Reported Outcomes and Quality of Life Endpoints Data Consortium recommendations for patient-reported outcome data analysis, the Consolidated Standards for Reporting of Trials-patient-reported outcome extension for reporting clinical trials with patient-reported outcomes, recommendations for the graphic display of patient-reported outcome data, and a Clinician's Checklist for reading and using an article about patient-reported outcomes. The PROTEUS-Trials website (www.TheProteusConsortium.org) serves as a central repository for the methodologic tools and associated resources. To date, we have developed (1) a roadmap to visually display where each of the six methodologic tools applies along the clinical trial trajectory, (2) web tutorials that provide guidance on the methodologic tools at different levels of detail, (3) checklists to provide brief summaries of each tool's recommendations, (4) a handbook to provide a self-guided approach to learning about the tools and recommendations, and (5) publications that address key topics related to patient-reported outcomes in clinical trials. We are also conducting organization-specific activities, including meetings, presentations, workshops, and webinars to publicize the existence of the methodologic tools and the PROTEUS-Trials resources. Work to develop communications strategies to ensure that PROTEUS-Trials reach key audiences with relevant information about patient-reported outcomes in clinical trials and PROTEUS-Trials is ongoing.
DISCUSSION
The PROTEUS-Trials Consortium aims to help researchers generate patient-reported outcome data from clinical trials to (1) enable investigators, regulators, and policy-makers to take the patient perspective into account when conducting research and making decisions; (2) help patients understand treatment options and make treatment decisions; and (3) inform clinicians' discussions with patients regarding treatment options. In these ways, the PROTEUS Consortium promotes patient-centred research and care.
Topics: Clinical Trials as Topic; Decision Making; Humans; Patient Reported Outcome Measures; Proteus; Quality of Life; Research Design; United States
PubMed: 35094586
DOI: 10.1177/17407745221077691 -
Mediators of Inflammation 2020Cancer causes a major health concern worldwide due to high incidence and mortality rates. To accomplish this purpose, the Scopus, PubMed, and Web of Science databases... (Review)
Review
Cancer causes a major health concern worldwide due to high incidence and mortality rates. To accomplish this purpose, the Scopus, PubMed, and Web of Science databases were searched using the keywords bacteria and cancer. Most of published research addressed several different factors that induced cancer, such as toxins, medications, smoking, and obesity. Nonetheless, few studies are dealing with cancer induction via bacterial infection. In addition, mechanisms of cancer induction via bacterial infections are not well understood. Therefore, in this review, we will shed light on different bacteria that induced cancer via different molecular mechanisms. Among the bacterial infection that induced cancer, was the first recognized bacteria which caused gastric cancer and might be also linked to extragastric cancer in humans. has been associated with adenocarcinoma in the distal stomach by its ability to cause severe inflammations. It has been found that inflammations induced cancer via different mechanisms including induction of cell proliferation and production of high levels of free radicals. Recently, free radicals were found to induce and cause various types of cancer. has been found to be associated with gallbladder carcinoma (GBC). Also, intercellular infection of lungs with Chlamydia pneumoniae was found to contribute as one of the ethological factors of lung cancer. Moreover, infection of the urinary tract with , spp., and has been found to cause bladder cancer. These microorganisms produce a high level of N-nitrosamines which are metabolically activated leading to the generation of alkylating agents that damage DNA and other macromolecules. It is concluded that a certain bacterium is linked with induction of a specific type of cancer via different molecular and biochemical mechanisms as discussed in the text in details. This infection could potentially affect human health in different ways. In addition, it is important to know the possible factors involved in cancer induction for better treatment of cancer patients.
Topics: Gallbladder Neoplasms; Helicobacter pylori; Humans; Incidence; Proteus mirabilis; Salmonella typhi; Staphylococcus aureus; Urinary Bladder Neoplasms
PubMed: 32724295
DOI: 10.1155/2020/4070419 -
Veterinary Medicine and Science Nov 2022Pyoderma is a purulent skin infection usually caused by bacteria and can be divided into primary and secondary categories based on histology. In the present study, an...
Pyoderma is a purulent skin infection usually caused by bacteria and can be divided into primary and secondary categories based on histology. In the present study, an 18-month-old female mixed breed sheep was examined for pyoderma at the injection site of the enterotoxemia vaccine. After routine bacteriology and histopathology procedures, secondary pyoderma caused by Proteus mirabilis was diagnosed. The bacterium analysed using genome sequencing and new strain called AJJ 2021 was diagnosed. This is the first report of pyoderma caused by Proteus mirabilis in sheep.
Topics: Female; Sheep; Animals; Proteus mirabilis; Pyoderma; Sheep Diseases
PubMed: 36049140
DOI: 10.1002/vms3.926 -
Frontiers in Molecular Neuroscience 2023Parkinson's disease (PD) is a representative neurodegenerative disease, and its diagnosis relies on the evaluation of clinical manifestations or brain neuroimaging in...
INTRODUCTION
Parkinson's disease (PD) is a representative neurodegenerative disease, and its diagnosis relies on the evaluation of clinical manifestations or brain neuroimaging in the absence of a crucial noninvasive biomarker. Here, we used non-targeted metabolomics profiling to identify metabolic alterations in the colon and plasma samples of ()-treated mice, which is a possible animal model for investigating the microbiota-gut-brain axis.
METHODS
We performed gas chromatography-mass spectrometry to analyze the samples and detected metabolites that could reflect -induced disease progression and pathology.
RESULTS AND DISCUSSION
Pattern, correlation and pathway enrichment analyses showed significant alterations in sugar metabolism such as galactose metabolism and fructose and mannose metabolism, which are closely associated with energy metabolism and lipid metabolism. This study indicates possible metabolic factors for -induced pathological progression and provides evidence of metabolic alterations associated with -mediated pathology of brain neurodegeneration.
PubMed: 37635904
DOI: 10.3389/fnmol.2023.1201073