Publications by authors named "Meyer Christian"

Plant growth depends on growth regulators, nutrient availability, and amino acids levels, all of which influence cell wall formation and cell expansion. Cell wall integrity and structures are surveyed and modified by a complex array of cell wall integrity sensors, including LRR-extensins (LRXs) that bind RALF (rapid alkalinization factor) peptides with high affinity and help to compact cell walls. Expressing the Arabidopsis root-hair specific LRX1 without the extensin domain, which anchors the protein to the cell wall, has a negative effect on root hair development.

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While mitotic spindle inhibitors specifically kill proliferating tumor cells without the toxicities of microtubule poisons, resistance has limited their clinical utility. Treating glioblastomas with the spindle inhibitors ispinesib, alisertib, or volasertib creates a subpopulation of therapy induced senescent cells that resist these drugs by relying upon the anti-apoptotic and metabolic effects of activated STAT3. Furthermore, these senescent cells expand the repertoire of cells resistant to these drugs by secreting an array of factors, including TGFβ, which induce proliferating cells to exit mitosis and become quiescent-a state that also resists spindle inhibitors.

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Unlabelled: Neoadjuvant chemotherapy (NAC) is a standard-of-care treatment for locally advanced triple negative breast cancer (TNBC) before surgery. The early assessment of TNBC response to NAC would enable an oncologist to adapt the therapeutic plan of a non-responding patient, thereby improving treatment outcomes while preventing unnecessary toxicities. To this end, a promising approach consists of obtaining in silico personalized forecasts of tumor response to NAC via computer simulation of mechanistic models constrained with patient-specific magnetic resonance imaging (MRI) data acquired early during NAC.

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  • The study investigates the effects of resting heart rate (RHR) on patients with heart failure who received implantable cardioverter-defibrillators (ICDs) or cardiac resynchronization therapy-defibrillators (CRT-Ds), specifically examining RHRs above and below 70 bpm.
  • A total of 1589 patients were analyzed, and results showed that one-year all-cause mortality and major cardiovascular events were similar between those with RHR ≤ 70 bpm and > 70 bpm.
  • However, patients with RHR > 70 bpm had higher rates of all-cause hospital admissions, mainly due to non-cardiovascular events, indicating potential increased risks associated with a higher RHR.
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Aims: Sodium-glucose co-transporter inhibitors (SGLTis) have cardiovascular protective effects. We aimed to assess the effects of SGLTis on individual hard clinical endpoints and quality of life (QoL) in patients with cardiovascular risk factors.

Methods And Results: Data was searched in PubMed, Embase, Cochrane Library and clinicaltrials.

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Background: Approximately half of patients with localised, high-risk soft tissue sarcoma of the extremity develop metastases. We aimed to assess whether the addition of pembrolizumab to preoperative radiotherapy and surgery would improve disease-free survival.

Methods: We completed an open-label, randomised clinical trial in patients with grade 2 or 3, stage III undifferentiated pleomorphic sarcoma or dedifferentiated or pleomorphic liposarcoma of the extremity and limb girdle.

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  • * The study explored the use of a light-sensitive compound called azobupivacaine (AB2) to control heart activity without genetic modification, showing promising results in mouse hearts.
  • * AB2 was found to effectively manage heart rhythms by blocking specific ion channels and converting arrhythmias to normal rhythm, suggesting new possibilities for developing light-based defibrillation methods.
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Objective: To evaluate the impact of a standardized antibiotic stewardship protocol on three subsequent endpoints in patients undergoing urethroplasty.

Methods: Men undergoing bulbar substitution urethroplasty between January 2009 and December 2016 were stratified by urine culture (UCx) at the time of surgery (sterile non-sterile) and were subjected to a standardized algorithm for urinalysis and antimicrobial therapy. We performed quantitative and qualitative exploration of UCx results and the microbial spectrum.

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  • Fast and accurate diagnosis and treatment of pleural infections can significantly lower mortality rates, highlighting the importance of starting treatment quickly and monitoring it regularly.
  • Advanced therapies, such as intrapleural fibrinolytic therapy, should be carried out in specialized medical departments.
  • In Denmark, there's an urgent need to improve the speed of diagnostic procedures and treatment for pleural infections to enhance patient outcomes.
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Background/objectives: The diagnosis of lung carcinoma (LC) is currently performed in small biopsies and according to the WHO classification by using limited stains to spare tissue for molecular testing. This procedure, however, often causes diagnostic uncertainty among pathologists.

Methods: In this retrospective analysis, we compared the diagnosis made by these guidelines in 288 lung biopsies with that using more stains, as retrieved from our archive.

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Background: Acutely effective repeated radiofrequency catheter ablation (RFCA) after previous atrial fibrillation ablation depends on several parameters including local impedance (LI), contact force (CF), and power.

Objective: We aimed to investigate the relationship of LI, CF, and power to the LI drop in a repeated atrial RFCA environment.

Methods: Consecutive patients undergoing repeated atrial RFCA were studied.

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  • Simulation-based training in urology is becoming increasingly important, and a study assessed its impact on the surgical confidence of residents after a workshop focused on ureteroscopy (URS) and transurethral resection of the bladder (TURB).
  • The workshop involved 40 participants, and results showed that while men generally reported higher surgical confidence before and after the session, both genders experienced an increase in confidence after the training.
  • Despite achieving similar surgical performance outcomes, women were less confident in performing URS tasks compared to men, indicating a gap that could be addressed through targeted support and training.
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WD40 Repeat Domain 5 (WDR5) is a highly conserved nuclear protein that recruits MYC oncoprotein transcription factors to chromatin to stimulate ribosomal protein gene expression. WDR5 is tethered to chromatin via an arginine-binding cavity known as the "WIN" site. Multiple pharmacological inhibitors of the WDR5-interaction site of WDR5 (WINi) have been described, including those with picomolar affinity and oral bioavailability in mice.

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Background: Descriptions of long-term histories of alcohol dependence provide insight into the etiology, prevention and care.

Objective: Report of empirical findings about the development into and remission from alcohol dependence.

Method: Narrative literature review, analysis of findings from cohort studies in the general population.

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The text reconstructs the concepts of practice and practicality used in ethnomethodology and conversation analysis and examines their internal similarities and differences as well as similarities and differences to other practice theories. After a description of the characteristics of practice theories, the ethnomethodological perspective on practice and practicality is presented. Then, the use of the terms in conversation analysis is examined.

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Background And Objectives: Spinal chordomas are primary bone tumors where surgery remains the primary treatment. However, their low incidence, lack of evidence, and late disease presentation make them challenging to manage. Here, we report the postoperative outcomes of a large cohort of patients after surgical resection, investigate predictors for overall survival (OS) and local recurrence-free survival (LRFS) times, and trend functional outcomes over multiple time periods.

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  • The study focuses on early detection of peripheral nerve sheath tumors (PNST) associated with neurofibromatosis type 1 (NF1) using a cell-free DNA (cfDNA) fragmentomic approach, which can improve clinical decision-making and treatment outcomes.
  • Researchers isolated cfDNA from plasma samples of 101 NF1 patients and 21 healthy controls, employing whole-genome sequencing and analyzing various fragmentomic signatures to differentiate between benign, premalignant, and malignant tumors.
  • Results showed that fragmentomic methods successfully distinguished atypical neurofibromas (premalignant) from benign forms and malignant PNST, offering potential for non-invasive diagnostics and better management of NF1-related tumors.*
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Cardioneuroablation has emerged as a potential alternative to cardiac pacing in selected cases with vasovagal reflex syncope, extrinsic vagally induced sinus bradycardia-arrest or atrioventricular block. The technique was first introduced decades ago, and its use has risen over the past decade. However, as with any intervention, proper patient selection and technique are a prerequisite for a safe and effective use of cardioneuroablation therapy.

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Li-Fraumeni syndrome (LFS) is caused by a pathogenic germline variant at the locus and is associated with an increased predisposition to a variety of cancers. The neoplasms most frequently associated with LFS are sarcomas, breast cancer, brain tumors, and adrenocortical carcinomas. In this case report, we present a 43-year-old male diagnosed with an ocular adnexal sebaceous carcinoma of the right upper eyelid who was confirmed to have LFS with subsequent genetic testing.

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Age is a major risk-factor for atrial fibrillation (AF) and associated hospitalisations. With increasing emphasis on rhythm control, pulmonary vein isolation (PVI) is often suggested, even to elderly patients (≥ 75 years of age). Efficacy of PVI aiming at rhythm control is limited in persistent AF.

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Context: Osteopathic (Doctor of Osteopathic Medicine [DO]) medical students account for more than 25 % of all medical students in the United States.

Objectives: This study examined the predictive validity of Medical College Admission Test (MCAT) total scores and cumulative undergraduate grade point averages (UGPAs) for performance on the Comprehensive Osteopathic Medical Licensing Examination of the United States (COMLEX-USA) Level 1 and Level 2-CE (Cognitive Evaluation) licensure examinations administered by the National Board of Osteopathic Medical Examiners (NBOME). Additionally, the study examined the degree to which MCAT total scores and UGPAs provide comparable prediction of student performance by key sociodemographic variables.

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This article examines the implementation, participation rates, and potential determinants of participation in the digital addiction prevention program "ready4life." A two-arm cluster-randomized trial recruited German vocational students via class-based strategies. Intervention group received 16 weeks of in-app coaching; the control group received health behavior information, with coaching offered after 12 months.

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  • Leiomyosarcoma (LMS) often presents with isolated lung metastases, but there is limited evidence on how to manage these cases effectively.
  • A study analyzed data from 629 LMS patients with synchronous isolated lung metastases, revealing that those treated at academic centers had better surgical outcomes.
  • The findings suggest that aggressive surgical approaches, including resection of both primary tumors and lung metastases, can significantly improve overall survival rates, particularly for patients treated in specialized high-volume centers.
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Understanding plant responses to individual stresses does not mean that we understand real-world situations, where stresses usually combine and interact. These interactions arise at different levels, from stress exposure to the molecular networks of the stress response. Here, we built an in-depth multiomic description of plant responses to mild water (W) and nitrogen (N) limitations, either individually or combined, among 5 genetically different Arabidopsis (Arabidopsis thaliana) accessions.

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