Publications by authors named "Thomas Karl"

Single-cell cytometry data are crucial for understanding the role of the immune system in diseases and responses to treatment. However, traditional methods for annotating cytometry data face challenges in scalability, robustness, and accuracy. We propose a cytometry masked autoencoder (cyMAE), which automates immunophenotyping tasks including cell type annotation.

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Article Synopsis
  • - The study explores how circadian rhythms, seasonal changes, and weather conditions may impact thromboembolic events specifically related to popliteal artery aneurysms (PAA), as data was gathered from a German PAA registry and meteorological service.
  • - Among the 1,200 cases analyzed, there were more symptomatic PAA patients in the first half of the year, particularly with symptoms appearing frequently in the morning; this suggests a seasonal and temporal pattern to their condition.
  • - The research revealed a correlation between temperature drops and symptom onset, with older patients showing less sensitivity to temperature changes, highlighting a need for further study on how weather influences these vascular events.
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Elastin, a key structural protein essential for the elasticity of the skin and elastogenic tissues, degrades with age. Replenishing elastin holds promise for anti-aging cosmetics and the supplementation of elastic activities of the cardiovascular system. We employed RiboScreen, a technology for identifying molecules that enhance the production of specific proteins, to target the production of tropoelastin.

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Direct airborne measurements of emission fluxes reveal major sources over California.

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A growing body of evidence highlights the effects of air pollution on chronic and acute cardiovascular diseases, such as associations between PM and several cardiovascular events. However, evidence of the impact of fine air pollutants on the development and progression of peripheral arterial aneurysms is not available. Data were obtained from the multicenter PAA outcome registry POPART and the German Environment Agency.

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Background: Popliteal artery aneurysms (PAAs) are the most common peripheral aneurysm. However, due to its rarity, the cumulative body of evidence regarding patient patterns, treatment strategies, and perioperative outcomes is limited. This analysis aims to investigate distinct phenotypical patient profiles and associated treatment and outcomes in patients with a PAA by performing an unsupervised clustering analysis of the POPART (Practice of Popliteal Artery Aneurysm Repair and Therapy) registry.

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Severe junctional epidermolysis bullosa is a rare genetic, postpartum lethal skin disease, predominantly caused by nonsense/premature termination codon (PTC) sequence variants in gene. encodes LAMB3, the β subunit of epidermal-dermal skin anchor laminin 332. Most translational reads of a PTC mRNA deliver truncated, nonfunctional proteins, whereas an endogenous PTC readthrough mechanism produces full-length protein at minimal and insufficient levels.

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Article Synopsis
  • The study focuses on the treatment and outcomes of popliteal artery aneurysms (PAAs) in women, who make up only 5% of PAA patients, highlighting the lack of extensive evidence in this area.
  • Data was collected from the POPART Registry, a large European registry involving 42 centers, examining clinical presentation and surgical outcomes since 2010.
  • Findings revealed that female patients had smaller aneurysms and higher rates of symptoms before surgery, along with increased complications like impaired wound healing and the need for additional procedures post-surgery compared to men.
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External cycling regenerating nitrogen oxides (NO ≡ NO + NO) from their oxidative reservoir, NO, is proposed to reshape the temporal-spatial distribution of NO and consequently hydroxyl radical (OH), the most important oxidant in the atmosphere. Here we verify the in situ external cycling of NO in various environments with nitrous acid (HONO) as an intermediate based on synthesized field evidence collected onboard aircraft platform at daytime. External cycling helps to reconcile stubborn underestimation on observed ratios of HONO/NO and NO/NO by current chemical model schemes and rationalize atypical diurnal concentration profiles of HONO and NO lacking noontime valleys specially observed in low-NO atmospheres.

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Importance: The Sepsis Prediction Model (SPM) is a proprietary decision support tool created by Epic Systems; it generates a predicting sepsis score (PSS). The model has not undergone validation against existing sepsis prediction tools, such as Systemic Inflammatory Response Syndrome (SIRS), Sequential Organ Failure Assessment (SOFA), or quick Sepsis-Related Organ Failure Asessement (qSOFA).

Objective: To assess the validity and timeliness of the SPM compared with SIRS, qSOFA, and SOFA.

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Objectives: Clinical sepsis phenotypes may be defined by a wide range of characteristics such as site of infection, organ dysfunction patterns, laboratory values, and demographics. There is a paucity of literature regarding the impact of site of infection on the timing and pattern of clinical sepsis markers. This study hypothesizes that important phenotypic variation in clinical markers and outcomes of sepsis exists when stratified by infection site.

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Purpose To develop optoacoustic, spectrally distinct, actively targeted gold nanoparticle-based near-infrared probes (trastuzumab [TRA], TRA-Aurelia-1, and TRA-Aurelia-2) that can be individually identifiable at multispectral optoacoustic tomography (MSOT) of human epidermal growth factor receptor 2 (HER2)-positive breast tumors. Materials and Methods Gold nanoparticle-based near-infrared probes (Aurelia-1 and 2) that are optoacoustically active and spectrally distinct for simultaneous MSOT imaging were synthesized and conjugated to TRA to produce TRA-Aurelia-1 and 2. Freshly resected human HER2-positive ( = 6) and HER2-negative ( = 6) triple-negative breast cancer tumors were treated with TRA-Aurelia-1 and TRA-Aurelia-2 for 2 hours and imaged with MSOT.

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Background: The Epic Sepsis Prediction Model (SPM) is a proprietary sepsis prediction algorithm that calculates a score correlating with the likelihood of an International Classification of Diseases, Ninth Revision code for sepsis.

Objective: This study aimed to assess the clinical impact of an electronic sepsis alert and navigator using the Epic SPM on time to initial antimicrobial delivery.

Methods: We performed a retrospective review of a nonrandomized intervention of an electronic sepsis alert system and navigator using the Epic SPM.

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We introduce two new drought stress algorithms designed to simulate isoprene emission with the Model of Emissions of Gases and Aerosols from Nature (MEGAN) model. The two approaches include the representation of the impact of drought on isoprene emission with a simple empirical approach for offline MEGAN applications and a more process-based approach for online MEGAN in Community Land Model (CLM) simulations. The two versions differ in their implementation of leaf-temperature impacts of mild drought.

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Nitrogen oxides (NO) play a central role in catalyzing tropospheric ozone formation. Nitrogen dioxide (NO) has recently reemerged as a key target for air pollution control measures, and observational evidence points toward a limited understanding of ozone in high-NO environments. A complete understanding of the mechanisms controlling the rapid atmospheric cycling between ozone (O)-nitric oxide (NO)-NO in high-NO regimes at the surface is therefore paramount but remains challenging because of competing dynamical and chemical effects.

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Purpose Of Review: Meniscus injury often leads to joint degeneration and post-traumatic osteoarthritis (PTOA) development. Therefore, the purpose of this review is to outline the current understanding of biomechanical and biological repercussions following meniscus injury and how these changes impact meniscus repair and PTOA development. Moreover, we identify key gaps in knowledge that must be further investigated to improve meniscus healing and prevent PTOA.

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Introduction: The COVID-19 pandemic brought an urgent need to discover novel effective therapeutics for patients hospitalised with severe COVID-19. The Investigation of Serial studies to Predict Your Therapeutic Response with Imaging And moLecular Analysis (ISPY COVID-19 trial) was designed and implemented in early 2020 to evaluate investigational agents rapidly and simultaneously on a phase 2 adaptive platform. This manuscript outlines the design, rationale, implementation and challenges of the ISPY COVID-19 trial during the first phase of trial activity from April 2020 until December 2021.

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The measures taken to contain the spread of COVID-19 in 2020 included restrictions of people's mobility and reductions in economic activities. These drastic changes in daily life, enforced through national lockdowns, led to abrupt reductions of anthropogenic CO emissions in urbanized areas all over the world. To examine the effect of social restrictions on local emissions of CO, we analysed district level CO fluxes measured by the eddy-covariance technique from 13 stations in 11 European cities.

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Ozone (O) pollution threatens global public health and damages ecosystem productivity. Droughts modulate surface O through meteorological processes and vegetation feedbacks. Unraveling these influences is difficult with traditional chemical transport models.

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Article Synopsis
  • Popliteal artery aneurysm (PAA) is a rare condition affecting 0.1% to 1% of the population, and the POPART registry was started in 2014 to compare endovascular repair (ER) and open surgical repair (OSR) as treatment options for PAAs.
  • The registry includes data from 41 global centers and recorded 794 cases from 2014 to 2019, showing that OSR was performed more often (662 patients) than ER (106 patients), with some demographic differences noted.
  • Results indicated that ER patients were generally older, had fewer symptoms, and faced fewer postoperative complications compared to OSR patients, although OSR patients had a longer hospital stay.
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Malignant pleural effusion (MPE) is indicative of terminal malignancy with a uniformly fatal prognosis. Often, two distinct compartments of tumour microenvironment, the effusion and disseminated pleural tumours, co-exist in the pleural cavity, presenting a major challenge for therapeutic interventions and drug delivery. Clinical evidence suggests that MPE comprises abundant tumour-associated myeloid cells with the tumour-promoting phenotype, impairing antitumour immunity.

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Volatile organic compounds (VOCs) emitted by plants consist of a broad range of gasses which serve purposes such as protecting against herbivores, communicating with insects and neighboring plants, or increasing the tolerance to environmental stresses. Evidence is accumulating that the composition of VOC blends plays an important role in fulfilling these purposes. Constitutional emissions give insight into species-specific stress tolerance potentials and are an important first step in linking metabolism and function of co-occurring VOCs.

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Introduction: Epidermolysis bullosa (EB) describes a family of rare genetic blistering skin disorders. Various subtypes are clinically and genetically heterogeneous, and a lethal postpartum form of EB is the generalized severe junctional EB (gs-JEB). gs-JEB is mainly caused by premature termination codon (PTC) mutations in the skin anchor protein LAMB3 (laminin subunit beta-3) gene.

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Isoprene is emitted from the biosphere into the atmosphere, and may strengthen the defense mechanisms of plants against oxidative and thermal stress. Once in the atmosphere, isoprene is rapidly oxidized, either to isoprene-hydroxy-hydroperoxides (ISOPOOH) at low levels of nitrogen oxides, or to methyl vinyl ketone (MVK) and methacrolein at high levels. Here we combine uptake rates and deposition velocities that we obtained in laboratory experiments with observations in natural forests to show that 1,2-ISOPOOH deposits rapidly into poplar leaves.

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A yeast deletion mutation in the nuclear-encoded gene, , which codes for a mitochondrial ribosomal protein, led to slow growth on glucose, the inability to grow on glycerol or ethanol, and loss of mitochondrial DNA and respiration. We noticed that yeast readily obtains secondary mutations that suppress aspects of this phenotype, including its growth defect. We characterized and identified a dominant missense suppressor mutation in the gene.

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