Publications by authors named "Ingmar Schafer"

Article Synopsis
  • Climate change is increasing the frequency of high temperatures, which poses serious health risks for patients with chronic diseases; empowering these patients is critical for their safety.
  • This study investigates how light to moderate heat affects health complaints and explores links between self-reported protective behaviors and psychosocial factors.
  • Conducted with 61 patients, the study collected data on their health complaints, protective behaviors, and chronic conditions, applying various statistical models to analyze the relationship between heat exposure and health outcomes.
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Article Synopsis
  • - The study focuses on the relationship between mRNA translation and decay in human cells, specifically highlighting the role of the cytoplasmic exosome in degrading mRNA linked to ribosomes during quality control.
  • - Researchers identified that HBS1L3 (SKI7) facilitates a direct physical coupling between EXO10 and the ribosome-bound SKI238 complex, enabling efficient mRNA handover for degradation.
  • - They discovered that the decay process involves a supercomplex formed by the exosome and ribosome, allowing mRNA to be efficiently threaded from the ribosome through the helicase to the exoribonuclease, effectively coordinating the decay mechanism.
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Introduction: Short-term studies reported improved glycemic control and a decrease in eHbA1c (estimated hemoglobin A1c) in patients with type 1 diabetes during COVID-19 lockdown, but long-term changes are unknown. Therefore, the main objectives are to (1) analyze whether laboratory-measured HbA1c changed during and after two lockdowns and (2) investigate potential variables influencing HbA1c change.

Methods: In this cohort study, 291 adults with type 1 diabetes were followed over 3 years including the prepandemic phase and two lockdowns.

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Introduction: Glycemic effects of COVID-19 lockdowns on patients with type 2 diabetes (T2D) are controversial. In this long-term observation, we aimed (1) to analyze changes in HbA1c levels during lockdowns in Germany, and (2) to investigate whether diabetes medication, comorbidities, and sociodemographic data influenced these changes.

Materials And Methods: This cohort study observed 1,089 patients aged ≥18 years over the years 2019 to 2021.

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The Ski2-Ski3-Ski8 (Ski238) helicase complex directs cytoplasmic mRNAs toward the nucleolytic exosome complex for degradation. In yeast, the interaction between Ski238 and exosome requires the adaptor protein Ski7. We determined different cryo-EM structures of the Ski238 complex depicting the transition from a rigid autoinhibited closed conformation to a flexible active open conformation in which the Ski2 helicase module has detached from the rest of Ski238.

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Messenger RNAs (mRNAs) are at the center of the central dogma of molecular biology. In eukaryotic cells, these long ribonucleic acid polymers do not exist as naked transcripts; rather, they associate with mRNA-binding proteins to form messenger ribonucleoprotein (mRNP) complexes. Recently, global proteomic and transcriptomic studies have provided comprehensive inventories of mRNP components.

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Objectives: In order to reduce the use of emergency departments, computer-assisted initial assessment was implemented at the medical on-call service 116117. Our study assessed compliance and patient satisfaction.

Design: Cross-sectional observational postal survey.

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Background: Older adults with multimorbidity represent a growing segment of the population. Metrics to assess quality, safety and effectiveness of care can support policy makers and healthcare providers in addressing patient needs. However, there is a lack of valid measures of quality of care for this population.

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Introduction: During the COVID-19 pandemic, many people were anxious about a coronavirus infection due to the high infection rate and the mortality risk associated with the disease. Fear of COVID-19 might have influenced patients' utilisation of medical services, even if it meant that a postponed therapy had severe consequences. Our aims were to analyse (a) to what extent fear of COVID-19 contributes to forgone consultations, (b) if patient characteristics, health literacy and social support influence the effect of fear of COVID-19 on the utilisation behaviour and (c) whether interactions between these possible predictor variables are responsible for a higher extent of avoided consultations due to fear of COVID-19.

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Importance: Uptake of vaccination against COVID-19 is strongly affected by concerns about adverse effects. Research on nocebo effects suggests that these concerns can amplify symptom burden.

Objective: To investigate whether positive and negative expectations prior to COVID-19 vaccination are associated with systemic adverse effects.

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Article Synopsis
  • The CCR4-NOT complex is a crucial player in the cytoplasm for degrading mRNA, involved in both routine and regulated decay processes.
  • The complex's effectiveness comes from its multi-subunit structure, with almost all parts understood except for the N-terminal module.
  • Recent high-resolution studies revealed the structure of this N-terminal module, highlighting its protein interactions and identifying GGNBP2 as a key interacting partner, indicating its role in tumor suppression and spermatogenesis.
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Introduction: High utilization of emergency departments by low-acuity patients remains a major challenge for the health care system. Surveys of treatment urgency show that a considerable part of the emergency department population could also be cared for in the outpatient sector. Little is known about the contributing circumstances of non-utilization of outpatient care (despite indication).

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Background: Patient numbers in emergency departments are on the rise. The DEMAND intervention aims to improve the efficacy of emergency services by computer-assisted structured initial assessment assigning patients to emergency departments or primary care practices. The aims of our study were to evaluate patient satisfaction with this intervention and to analyse if reduced patient satisfaction is predicted by sociodemographic data, health status or health literacy.

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Background: There is evidence that perceived urgency of medical complaints is associated with emergency care utilization. Patients' perception of urgency can differ from physicians' assessment. This study explored public perceptions of urgency of severe cases of COVID-19 and inflammatory gastrointestinal disease and analyzed variations in perceptions of urgency by characteristics of the afflicted person in the vignettes and sociodemographic characteristics of respondents.

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Introduction: Progressive chronic, non-malignant diseases (CNMD) like congestive heart failure (CHF), chronic obstructive pulmonary disease (COPD) and dementia are of growing relevance in primary care. Most of these patients suffer from severe symptoms, reduced quality of life and increased numbers of hospitalisations. Outpatient palliative care can help to reduce hospitalisation rate by up to 50%.

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Purpose: Health literacy (HL) intervention could be a potential prevention strategy to reduce the risk of metabolic syndrome (MS), but the association between low HL and MS is controversial. Therefore, the aim of this study was to investigate whether low HL is associated with obesity, diabetes, and hypertension, considering them as one cluster.

Methods: We used data from the Hamburg Diabetes Prevention Survey, a population-based cross-sectional study in Germany.

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Objectives: To examine variations in intended healthcare utilisation in severe cases of COVID-19 and inflammatory gastrointestinal disease (IGD).

Design: Representative cross-sectional telephone survey.

Setting And Participants: 1207 randomly drawn adults of the city of Hamburg, Germany, between November 2020 and January 2021.

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Cone snail venoms contain a wide variety of bioactive peptides, including insulin-like molecules with distinct structural features, binding modes and biochemical properties. Here, we report an active humanized cone snail venom insulin with an elongated A chain and a truncated B chain, and use cryo-electron microscopy (cryo-EM) and protein engineering to elucidate its interactions with the human insulin receptor (IR) ectodomain. We reveal how an extended A chain can compensate for deletion of B-chain residues, which are essential for activity of human insulin but also compromise therapeutic utility by delaying dissolution from the site of subcutaneous injection.

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Article Synopsis
  • - The superkiller (SKI) complex is important for RNA degradation in human cells and is linked to the congenital disorder trichohepatoenteric syndrome when it malfunctions.
  • - Researchers studied the structure of the human SKI complex in different functional states, focusing on its interaction with ribosomes and RNA.
  • - The SKI complex has a unique gating system that controls RNA movement, switching from a closed to an open conformation, which is essential for RNA processing and is similar in other helicase-exosome complexes.
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Background And Objectives: Providing health care for older adults with multimorbidity is often complex, challenging, and prone to fragmentation. Although clinical decision making should take into account treatment interactions, individual burden, and resources, current approaches to assessing quality of care mostly rely on indicators for single conditions. The aim of this project was to develop a set of generic quality indicators for the management of patients aged 65 and older with multimorbidity that can be used in both health care research and clinical practice.

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Knowledge and beliefs about health and health care are part of the general concept of health literacy. Studies demonstrated that large parts of the population report inadequate health literacy. There are only few studies specifically addressing public knowledge and beliefs about emergency care.

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Objectives: Aim of this study was to analyse if subjectively perceived treatment urgency of patients in emergency departments is associated with self-reported health literacy and the willingness to use the general practitioner (GP) as coordinator of treatment.

Design: A multicentre, cross-sectional, observational study.

Setting: Emergency departments in five hospitals.

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Objectives: Our study aimed to assess the frequency of potentially inappropriate medication (PIM) use (according to three PIM lists) and to examine the association between PIM use and cognitive function among participants in the MultiCare cohort.

Design: MultiCare is conducted as a longitudinal, multicentre, observational cohort study.

Setting: The MultiCare study is located in eight different study centres in Germany.

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Eukaryotic cells employ three SMC (structural maintenance of chromosomes) complexes to control DNA folding and topology. The Smc5/6 complex plays roles in DNA repair and in preventing the accumulation of deleterious DNA junctions. To elucidate how specific features of Smc5/6 govern these functions, we reconstituted the yeast holo-complex.

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Objectives: The aims of our study were to describe the effect of the COVID-19 pandemic and lockdown on primary care in Germany regarding the number of consultations, the prevalence of specific reasons for consultation presented by the patients, and the frequency of specific services performed by the GP.

Methods: We conducted a longitudinal observational study based on standardised GP interviews in a quota sampling design comparing the time before the COVID-19 pandemic (12 June 2015 to 27 April 2017) with the time during lockdown (21 April to 14 July 2020). The sample included GPs in urban and rural areas 120 km around Hamburg, Germany, and was stratified by region type and administrative districts.

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