Publications by authors named "Michels H"

This study aims at providing estimates on the transmission risk of SARS-CoV-2 in schools and day-care centres. We calculated secondary attack rates (SARs) using individual-level data from state-wide mandatory notification of index cases in educational institutions, followed by contact tracing and PCR-testing of high-risk contacts. From August to December 2020, every sixth of overall 784 independent index cases was associated with secondary cases in educational institutions.

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Sepsis is an extremely complex clinical syndrome, usually involving an excessive inflammatory response including an overshooting cytokine release that damages tissue and organs of the patient. Due to the severity of this condition, it is estimated that over 11 million people die from sepsis each year. Despite intensive research in the field, there is still no specific therapy for sepsis.

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For glioblastoma, the treatment with standard of care therapy comprising resection, radiation, and temozolomide results in overall survival of approximately 14-18 months after initial diagnosis. Even though several new therapy approaches are under investigation, it is difficult to achieve life prolongation and/or improvement of patient's quality of life. The aggressiveness and progression of glioblastoma is initially orchestrated by the biological complexity of its genetic phenotype and ability to respond to cancer therapy via changing its molecular patterns, thereby developing resistance.

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Purpose: Multiple Sclerosis (MS) is an incurable neurodegenerative disease that results in deficits in physical and cognitive function, and often fosters low levels of self-efficacy for physical activity, motivation for physical activity, and quality of life [1]. Drug therapies, physical therapy rehabilitation, and lifestyle modifications such as increased physical activity are standard protocol for symptom management, yet persons with MS tend to be physically inactive [2,3]. Additionally, single-modality interventions do not inherently address the challenges faced concurrently by individuals with MS [4,5].

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Background: Uncemented implants are still associated with several major challenges, especially with regard to their manufacturing and their osseointegration. In this study, a novel manufacturing technique-an optimized form of precision casting-and a novel surface modification to promote osseointegration-calcium and phosphorus ion implantation into the implant surface-were tested in vivo.

Methods: Cylindrical Ti6Al4V implants were inserted bilaterally into the tibia of 110 rats.

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Background: Uveitis in juvenile idiopathic arthritis (JIAU) is frequently associated with the development of complications and visual loss. Topical corticosteroids are the first line therapy, and disease modifying anti-rheumatic drugs (DMARDs) are commonly used. However, treatment has not been standardized.

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Background: Hepatitis C, a liver disease transmitted by the hepatitis C virus (HCV), can result in liver cirrhosis and hepatocellular carcinoma (HCC). According to WHO estimates for 2015, approximately 71 million people worldwide are chronically infected with HCV, representing 1% of the world population. Worldwide migration movements lead to immigration from HCV high- to low-prevalence countries.

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Background: Caveolin-3 (CAV3) is a muscle-specific protein localized to the sarcolemma. It was suggested that CAV3 is involved in the connection between the extracellular matrix (ECM) and the cytoskeleton. Caveolinopathies often go along with increased CK levels indicative of sarcolemmal damage.

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Article Synopsis
  • The study evaluated the effects of performing percutaneous coronary intervention (PCI) on chronic total occlusions (CTOs) in patients with STEMI, revealing that CTOs are found in 10% of such cases.
  • A multicenter trial with 302 patients showed that there were no significant differences in major adverse cardiac events (MACE) after either CTO-PCI or CTO-No PCI over a median follow-up of 3.9 years.
  • While CTO-PCI did not reduce MACE, it did result in a higher rate of angina-free patients after one year compared to CTO-No PCI, suggesting a potential benefit that requires further exploration.
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Background: Although several studies show that JIA-patients have significantly lower employment rates than the general population, the research on educational and occupational attainments in patients with juvenile idiopathic arthritis (JIA) remain conflicting most likely due to small sample sizes. Therefore, aim of this study is to compare the educational achievements and employment status of 3698 JIA-patients with the German general population (GGP).

Methods: "SEPIA" was a large cross-sectional study on the current status of a historic cohort of JIA-patients treated in a single center between 1952 and 2010.

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Background: Whole-exome sequencing (WES) has been successful in identifying genes that cause familial Parkinson's disease (PD). However, until now this approach has not been deployed to study large cohorts of unrelated participants. To discover rare PD susceptibility variants, we performed WES in 1148 unrelated cases and 503 control participants.

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The enzyme TDO (tryptophan 2,3-dioxygenase; TDO-2 in Caenorhabditis elegans) is a potential therapeutic target to cancer but is also thought to regulate proteotoxic events seen in the progression of neurodegenerative diseases. To better understand its function and develop specific compounds that target TDO we need to understand the structure of this molecule. In C.

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Article Synopsis
  • The study examines the balance between protein synthesis and breakdown, highlighting its importance for maintaining protein homeostasis, which declines with age.
  • Researchers used a technique called pulsed SILAC to analyze how quickly individual proteins turnover in models of longevity and Parkinson's disease using C. elegans.
  • Results showed that young long-lived worms had slower protein turnover, while older mutants had faster rates, while in Parkinson's models, turnover was reduced across the board, indicating adaptability in the protein homeostasis network.
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Mitochondrial dysfunction is at the core of many diseases ranging from inherited metabolic diseases to common conditions that are associated with aging. Although associations between aging and mitochondrial function have been identified using mammalian models, much of the mechanistic insight has emerged from Caenorhabditis elegans. Mitochondrial respiration is recognized as an indicator of mitochondrial health.

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Objectives: In recent years, concern has been raised about Juvenile Idiopathic Arthritis (JIA) that it could be associated with an increased risk for malignancies. Therefore, the cancer incidence in the JIA patients was evaluated and compared to the cancer incidence in the German population.

Methods: A retrospective single-center hospital-based cohort study was performed using data on the JIA patients treated between 1952 and 2010 at the German Center for Pediatric and Adolescent Rheumatology (GCPAR) (Garmisch-Partenkirchen, Germany).

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Objective: Aims of the study were to investigate health-related quality of life (HRQOL) in adult patients with former diagnosis of Juvenile Idiopathic Arthritis (JIA), to compare their HRQOL with the general population and to identify factors related to a poor outcome.

Methods: In 2012, a cross-sectional survey was performed by mailing a questionnaire to a large cohort of former and current patients of the German Centre for Rheumatology in Children and Adolescents. Only adult patients (≥18 years) with a diagnosis compatible with JIA were included (n = 2592; response 66%).

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Background: Several medications for treatment of Juvenile Idiopathic Arthritis (JIA) are considered to be carcinogenic. Therefore, the aim was to assess whether there is an association between therapeutic interventions and malignancies in JIA patients.

Findings: A nested case-control study was carried out within a retrospective cohort study of 3698 JIA patients diagnosed between 1952 and 2010.

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Objective: This is a translational science article that discusses copper alloys as antimicrobial environmental surfaces. Bacteria die when they come in contact with copper alloys in laboratory tests. Components made of copper alloys were also found to be efficacious in a clinical trial.

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We describe an outbreak of two clonally different strains of Serratia marcescens in a neonatal intensive care unit. Three colonization cases in the first outbreak phase were related to contact transmission from an index patient during emergency respiratory treatment while eight colonizations in the second phase were caused by contaminated bathing lotion. All transmissions resulted in colonization only and no infections were recorded.

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Leucine-rich repeat kinase 2 (LRRK2) is a multi-domain 280 kDa protein that is linked to Parkinson's disease (PD). Mutations especially in the GTPase and kinase domains of LRRK2 are the most common causes of heritable PD and are also found in sporadic forms of PD. Although the cellular function of LRRK2 is largely unknown there is increasing evidence that these mutations cause cell death due to autophagic dysfunction and mitochondrial damage.

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Article Synopsis
  • The study focuses on granulomatosis with polyangiitis (GPA) in children, analyzing data from 56 pediatric patients diagnosed before age 18.
  • Most of the patients were female (68%) and Caucasian (82%), with a median diagnosis age of around 11.7 years and an average diagnosis delay of 4.2 months.
  • Clinical signs were predominantly seen in the ears, nose, throat, and respiratory system, with a notable percentage of patients testing positive for ANCA-PR3 and presenting with haematuria/proteinuria, showing different patterns of organ involvement compared to adults.
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Caenorhabditis elegans comprises unique features that make it an attractive model organism in diverse fields of biology. Genetic screens are powerful to identify genes and C. elegans can be customized to forward or reverse genetic screens and to establish gene function.

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