Publications by authors named "SOMMER R"

Bacteria frequently employ carbohydrate-binding proteins, so-called lectins, to colonize and persist in a host. Thus, bacterial lectins are attractive targets for the development of new antiinfectives. To find new potential targets for antiinfectives against pathogenic bacteria, we searched for homologs of Pseudomonas aeruginosa lectins and identified homologs of LecA in Enterobacter species.

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Chromosome alignment during mitosis can occur as a consequence of bi-orientation or is assisted by the CENP-E (kinesin-7) motor at kinetochores. We previously found that Indian muntjac chromosomes with larger kinetochores bi-orient more efficiently and are biased to align in a CENP-E-independent manner, suggesting that CENP-E dependence for chromosome alignment negatively correlates with kinetochore size. Here, we used targeted phylogenetic profiling of CENP-E in monocentric (localized centromeres) and holocentric (centromeres spanning the entire chromosome length) clades to test this hypothesis at an evolutionary scale.

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The free-living nematode Pristionchus pacificus has been established as a model system in integrative evolutionary biology by combining laboratory studies with field work and evolutionary biology. Multiple genetic, molecular and experimental tools and a collection of more than 2,500 P. pacificus strains and more than 50 Pristionchus species, which are available as living cultures or frozen stock collections, support research on various life history traits.

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Polyphenisms, the capability of organisms to form two or more alternative phenotypes in response to environmental variation, are prevalent in nature. However, associated molecular mechanisms and potential general principles of polyphenisms among major organismal groups remain currently unknown. This review focuses on an emerging model system for developmental plasticity and polyphenism research, the nematode and explores mechanistic insight obtained through unbiased genetic, experimental and natural variation studies.

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Article Synopsis
  • The study focuses on women of childbearing age (WoCBA) with moderate-to-severe psoriasis, examining their treatment options based on their pregnancy plans.
  • It compares two groups: those wishing to conceive (CB+) and those not planning to have more children (CB-), noting that there were no major differences in health-related quality of life but a higher use of certain treatments in the CB+ group.
  • Results indicate that discussions about family planning were more frequent among the CB+ group, but overall patient-doctor agreement on treatment decisions was only fair-to-moderate, highlighting areas for improvement in shared decision-making.
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  • DNA- and RNA-based diagnostics are crucial for detecting health-related bacteria, providing important information on their presence and treatment effectiveness.
  • A new extraction protocol using an ionic liquid and magnetic beads enables quick and easy molecular diagnostics by efficiently capturing nucleic acids without needing extensive materials.
  • This method demonstrates comparable or better performance than current commercial extraction kits, is cost-effective, requires minimal resources, and is suitable for rapid testing in various settings, promoting advancements in molecular diagnostics.
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The factors contributing to evolution of androdioecy, the coexistence of hermaphrodites and males such as in Caenorhabditis elegans, remains poorly known. However, nematodes exhibit androdioecy in at last 13 genera with the predatory genus Pristionchus having seven independent transitions towards androdioecy. Nonetheless, associated genomic architecture and sex determination mechanisms are largely known from Caenorhabditis.

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  • Free-living nematodes like Caenorhabditis elegans and Pristionchus pacificus are valuable for studying genetic traits and their evolution, necessitating a solid phylogenomic framework.
  • The research generated a detailed genome assembly of Rhabditoides inermis, previously considered a sister group to Diplogastridae, revealing complex associations with multiple microbes including a specific fungus.
  • Phylogenomic analysis contradicts the hypothesis that R. inermis is a sister taxon to diplogastrids, instead indicating a closer relationship between Diplogastridae and certain Rhabditidae, including C. elegans, while providing new resources for future genomic studies.
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Optical coherence tomography angiography (OCT-A) retinal imaging enables visualization of the retinal microvasculature that is developmentally related to the brain and can offer insight on cerebrovascular health. We investigated retinal phenotypes and neuroimaging markers of small vessel disease (SVD) in individuals with obstructive sleep apnoea (OSA). We enrolled 44 participants (mean age 50.

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Based on molecular markers, mating experiments, morphological observations and ecological data, two species (Nematoda: Diplogastridae) new to science are described. Both were collected from different Scarabaeoid beetles in South Korea, have a gonochoristic mode of reproduction and fall into a sub-clade of the clade. n.

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Developmental plasticity enables the production of alternative phenotypes in response to different environmental conditions. While significant advances in understanding the ecological and evolutionary implications of plasticity have been made, understanding its genetic basis has lagged. However, a decade of genetic screens in the model nematode has culminated in 30 genes which affect mouth-form plasticity.

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The pathophysiology of migraine remains poorly understood. Like most migraine preventive therapies, patent foramen ovale (PFO) closure was never intended for the treatment of migraine. After closure of PFO for other reasons, migraine symptom reduction/elimination was noted in some patients.

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Life stories play a crucial role in migration discourses: they serve as testimony in journalistic work, form the core of ambassadorial storytelling by non-governmental organizations (NGOs), and inspire collaborative projects initiated by writers seeking to express their solidarity. However, this article argues, drawing on migrants' experiences for such purposes also creates an ethical dilemma: speaking -or even -rather than migrants assigns them a passive role and tends to recycle existing narrative patterns and templates. Starting with a generic distinction between what we call stories of migration (various forms of self-expression granting migrants full authority and control over their narrative) and narratives on migration (external perspectives, , academic, economic, political, and legal approaches, detached from lived experience), we explore the extensive middle ground of hybrid forms between these two extremes- , different kinds of vicarious storytelling-before addressing their ethical implications.

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Background: The GORE CARDIOFORM ASD Occluder (GCA, W. L. Gore & Associates) was approved in 2019 for ostium secundum atrial septal defect (ASD) closure.

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is a free-living nematode that shares many features with , such as its short generation time and hermaphroditism, but also exhibits novel traits, i.e., a mouth-form dimorphism that enables predation.

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Background: Women of childbearing age (WoCBA) with psoriasis face additional burden related to contraindications of systemic treatments during pregnancy/lactation and to the physical and psychosocial impact of psoriasis on their intimate/sexual relationships.

Objective: Within a people-centered health care model, this study aimed to identify specific patient needs and their correlates in WoCBA (18-45 years), in comparison to same-age men and women above 45 years.

Methods: Baseline data from the German PsoBest registry, including patients with moderate/severe plaque-type psoriasis with the indication for systemic therapy, were retrospectively analyzed.

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Self-stigma beliefs are common among people with visible chronic skin diseases and can negatively affect their quality of life and psychosocial wellbeing. Hence, evidence-based interventions are urgently needed. The objective for this systematic review was to summarize research on available interventions and evaluate their benefits and limitations.

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Article Synopsis
  • People with skin diseases experience physical symptoms and a significant psychosocial burden due to stigmatization, impacting their mental health.
  • This systematic literature review focused on self-stigmatization in adults with specific chronic skin diseases (like psoriasis and vitiligo) and aimed to identify factors that contribute to this self-stigma for potential psychosocial interventions.
  • The review included 27 studies which found that social stigma, coping strategies (like low acceptance), and inadequate social support predict self-stigma, but the cross-sectional design of most studies limits understanding of causal relationships.
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N-hydroxy-5-methylfuran-2-sulfonamide (BMS-986231, Cimlanod) was being developed as a pH-sensitive prodrug of HNO (nitroxyl) for the treatment of acute decompensated heart failure. During a stressed study of Cimlanod in a prototype formulation solution (pH 4.5) at 40°C, a predominant unknown degradant along with three previously identified degradants were observed.

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Vitiligo is a common disorder characterized by the visible loss of skin pigmentation. Non-segmental vitiligo (NSV) is the major subtype. The disease is caused by autoimmune-mediated destruction of melanocytes.

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Article Synopsis
  • * A newly introduced seminar aimed at increasing awareness and knowledge about skin type diversity was evaluated among fourth-year medical students at the University of Hamburg, utilizing a pre- and post-seminar questionnaire.
  • * Results showed a significant improvement in students' self-assessed competence in diagnosing and managing skin conditions in patients of color, indicating a need for more educational opportunities on this topic in medical training.
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How to grow crystals for X-ray crystallography.

Acta Crystallogr C Struct Chem

August 2024

Growing high-quality crystals remains a necessary part of crystallography and many other techniques. This article tabulates and describes several techniques and variations that will help individuals grow high-quality crystals in preparation for crystallographic techniques and other endeavors, such as form screening. The discussion is organized to focus on low-tech approaches available in any laboratory.

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Purpose: Immunotherapy has improved survival for patients with melanoma and non-small cell lung cancer (NSCLC). Yet, as responses vary widely, immunotherapy also introduces challenges in prognostic communication. In this study, we sought to explore how patients and caregivers learned about the goal of immunotherapy and their experience of living with uncertainty.

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The contribution of ships to the microbial faecal pollution status of water bodies is largely unknown but frequently of human health concern. No methodology for a comprehensive and target-orientated system analysis was available so far. We developed a novel approach for integrated and multistage impact evaluation.

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