Publications by authors named "Christoph Berger"

Background: Many children and adolescents with psychiatric disorders struggle with sleep problems that oftentimes stay unaddressed in therapeutic settings due to limited resources. Still, there is evidence that improving insufficient sleep positively affects mental health recovery. Addressing an adequate sleep hygiene is named to be the first line of treatment when it comes to unspecific sleep problems.

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Unlabelled: Since its delayed re-emergence after non-pharmaceutical interventions (NPIs) against the COVID-19 pandemic, Mycoplasma pneumoniae has caused community-acquired pneumonia outbreaks worldwide. In this study, we aimed to investigate how the clinical characteristics and severity of M. pneumoniae infections have changed after COVID-19 pandemic restriction, in order to enable adequate interpretation of clinical features and response to future M.

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Background: Data collection in the pediatric primary care settings, conducted by general practitioners and pediatricians, is inherently challenging. However, during the COVID-19 pandemic caused by the SARS-CoV-2 virus, the urgent need for real-time, localized information on the pandemic's impact on children motivated a network of pediatric practices in the canton of Zurich to undertake systematic data collection and analysis. This initiative aimed to complement established public health networks by providing focused insights from the local pediatric primary care perspective.

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BackgroundThe retrogenesis hypothesis (RH) suggests that the functional and cognitive decline observed in Alzheimer's disease dementia mirrors in reverse order the brain development during childhood and adolescence.ObjectiveEquivalent electroencephalogram (EEG) patterns between older adults across different cognitive decline stages and children across different brain maturation stages were directly compared.MethodsTo capture the complex patterns that allow for such a comparison, a regression model was trained on EEG data from N = 510 older adults, at different stages of cognitive reserve, to identify EEG markers predictive of global cognitive status.

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Objective: To investigate the potential influence of vesicoureteral reflux (VUR) on stone formation in children.

Study Design: A retrospective analysis was conducted on consecutive patients admitted between 2010 and 2023 for either (1) stone treatment (via ESWL or PCNL) or (2) vesicoureteral reflux (VUR). The evaluation included demographic data and, if applicable, the timing and results of voiding cystourethrograms (VCUG).

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Optimal dosing of cefepime in infants 1-2 months remains undefined. : We aimed to quantify the risk of potentially neurotoxic exposure with high-dose cefepime (50 mg/kg/8 h) in infants 1-2 months of age, as compared to adjacent age groups (neonates, infants 2-12 months) and lower dose treatment (50 mg/kg/12 h). : Pharmacometric simulations were performed using two published population pharmacokinetic models combined with demographic data, including serum creatinine, for neonates and infants ≤ 12 months.

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Transcranial direct current stimulation (tDCS) as a non-invasive stimulation is still in the experimental stage for many psychiatric disorders even in adults. The use of tDCS provides an opportunity to influence neural networks and their functional connectivity. How tDCS affects cortical networks and how it influences the functional connectivity of the developing brain is largely unknown.

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Objective: Anorexia nervosa (AN) is associated with hyperactivity, amenorrhea, and brain atrophy. Weight rehabilitation reversed these symptoms, although the underlying pathophysiological mechanisms are mostly unknown. Serum neurofilament light chain (NfL) levels are widely used as a biomarker of neurodegeneration.

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Amoxicillin is commonly used to treat erythema migrans in the first stage of Lyme disease in children, with a recommended dose of 50 mg/kg/day, administered three times a day (q8h). This model-based simulation study aimed to determine whether splitting the same daily dose into two administrations (q12h) would provide comparable drug exposure. A pharmacokinetic model suitable for a pediatric population (age: 1 month to 18 years, weight: 4-80 kg) was selected through a literature review.

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Objective: Anorexia nervosa (AN) is an eating disorder characterized by severe weight loss and associated with hyperactivity and circadian rhythm disruption. However, the cellular basis of circadian rhythm disruption is poorly understood. Glial cells in the suprachiasmatic nucleus (SCN), the principal circadian pacemaker, are involved in regulating circadian rhythms.

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Transcranial direct current stimulation (tDCS) remains experimental for many psychiatric disorders in adults. Particularly in childhood, there is limited research on the evidence for the efficacy and mechanisms of action of tDCS on the developing brain. The objective of this review is to identify published experimental studies to examine the efficacy and mechanisms of tDCS in children with psychiatric or developmental disorders in early (prepubertal) childhood (aged under 10 years).

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Background: Lyme disease (LD) is caused by and is the most common tickborne disease in the northern hemisphere. Although classical characteristics of LD are well-known, the diagnosis and treatment are often delayed. Laboratory diagnosis by serological testing is recommended for most LD manifestations.

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Article Synopsis
  • In high-income countries like Switzerland, early onset sepsis (EOS) affects 1 in 3000 to 5000 full-term neonates, with higher incidence and mortality rates in very preterm infants, leading to concerns over excessive antibiotic use and antimicrobial resistance (AMR).
  • Immediate antibiotic treatment is necessary for neonates showing signs of septic shock, with amoxicillin and an aminoglycoside being the first-line therapy; however, antibiotics should be avoided in asymptomatic neonates.
  • The use of risk stratification tools, such as the EOS calculator, is not recommended in Switzerland due to low observed antibiotic exposure and the need for careful assessment of risk factors and clinical signs before initiating treatment.
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  • * The MYTHIC Study is designed as a rigorous trial involving 13 Swiss pediatric centers, comparing macrolide treatment to placebo in children aged 3-17 diagnosed with pneumonia, using precise tests to confirm M. pneumoniae infection.
  • * The main goals are to assess the time to stabilize vital signs and determine any changes in patient care within 28 days, with an aim to show that the placebo is not significantly less effective than macrolide treatment in managing this infection.
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Introduction: Vaccination is one of the most effective infection prevention strategies. Viruses with high mutation rates -such as influenza- escape vaccine-induced immunity and represent significant challenges to vaccine design. Influenza vaccine strain selection is based on circulating strains and immunogenicity testing in animal models with limited predictive outcomes for vaccine effectiveness in humans.

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  • Voriconazole (VOR), an anti-fungal drug, can cause phototoxicity and skin cancer by impairing the DNA repair process known as nucleotide excision repair (NER).
  • VOR affects NER not by changing the expression of related genes but by binding to heterochromatin, disrupting the acetylation of histone H3, which is necessary for effective DNA repair.
  • Using histone deacetylase inhibitors to restore H3 acetylation can reverse the NER inhibition caused by VOR, suggesting a potential therapeutic strategy to prevent its harmful effects.
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Background: In the initial phase of the SARS-CoV-2 pandemic, masking has been widely accepted in healthcare institutions to mitigate the risk of healthcare-associated infection. Evidence, however, is still scant and the role of masks in preventing healthcare-associated SARS-CoV-2 acquisition remains unclear.We investigated the association of variation in institutional mask policies with healthcare-associated SARS-CoV-2 infections in acute care hospitals in Switzerland during the BA.

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  • Functional neuroimaging shows increased activity in a specific brain circuit related to Tic disorders, but structural imaging presents mixed findings, with some suggesting reduced caudate nucleus sizes in children with Gilles de la Tourette syndrome.
  • This study aimed to examine whether transcranial sonography (TCS) could identify abnormalities in specific deep brain structures among children with Tic disorders or Tourette syndrome compared to healthy controls.
  • Results indicated that children with Tic disorders showed higher instances of a hyperechogenic area in the left caudate nucleus, which was associated with more frequent thought and obsessive-compulsive problems, suggesting that structural changes in the brain could be linked to these issues.
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  • The Epstein-Barr virus (EBV) infects immune cells called B cells, helping them grow and change in a way that can lead to cancers called lymphomas.
  • A key protein from the virus, called EBNA2, boosts the production of a special substance (NAD) that B cells need to grow properly.
  • When doctors found this process in infected B cells of transplant patients, they realized it could be a target for new treatments to fight EBV-related diseases.
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Background: Giant cell arteritis is an age-related vasculitis that mainly affects the aorta and its branches in individuals aged 50 years and older. Current options for diagnosis and treatment are scarce, highlighting the need to better understand its underlying pathogenesis. Genome-wide association studies (GWAS) have emerged as a powerful tool for unravelling the pathogenic mechanisms involved in complex diseases.

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Background And Aims: Pharmacometric in silico approaches are frequently applied to guide decisions concerning dosage regimes during the development of new medicines. We aimed to demonstrate how such pharmacometric modelling and simulation can provide a scientific rationale for optimising drug doses in the context of the Swiss national dose standardisation project in paediatrics using amikacin as a case study.

Methods: Amikacin neonatal dosage is stratified by post-menstrual age (PMA) and post-natal age (PNA) in Switzerland and many other countries.

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Importance: Major depressive disorder is one of the most common mental disorders among adolescents, entailing severe, long-term psychosocial impairment and a high risk of chronicity. In view of the large number of patients requiring treatment, along with insufficient treatment responses with small effect sizes, innovative adjunctive treatment strategies are urgently needed.

Objective: To investigate whether the effect of adolescent psychiatric inpatient treatment as usual for major depressive disorder can be enhanced by simultaneous use of morning bright light therapy.

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Background: A considerable proportion of drugs administered to children are not authorised for this purpose, and consequently off-label use is common in paediatric care. Our aims were to quantify systematically the number of drugs authorised in Switzerland for use in children based on their current summary of product characteristics (SmPC) and to assess the quality of this information.

Methods: We used natural language processing to screen all Swiss SmPCs, available in German language in the open-source drug database, for information about use in children.

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