Publications by authors named "P-H Clausen"

Background Mounting evidence has demonstrated a role of psychosocial stressors such as discrimination in hypertension and cardiovascular diseases. The objective of this study was to provide the first instance of research evidence examining prospective associations of workplace discrimination with onset of hypertension. Methods and Results Data were from MIDUS (Midlife in the United States), a prospective cohort study of adults in the United States.

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  • Small molecule inhibitors targeting the PI3K signaling pathway are being researched as cancer treatments, particularly for solid tumors linked to the PI3Kα isoform.
  • The study focuses on developing benzoxazepin-oxazolidinone inhibitors that selectively degrade mutant p110α, the active part of PI3Kα, with impressive isoform specificity.
  • The resulting clinical candidate, GDC-0077 (inavolisib), shows strong effectiveness in animal models and is currently in a Phase III clinical trial for treating patients with breast cancer harboring PI3Kα mutations.
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Background: We sought to describe trends in extracorporeal membrane oxygenation (ECMO) use, and define the impact on PGD incidence and early mortality in lung transplantation.

Methods: Patients were enrolled from August 2011 to June 2018 at 10 transplant centers in the multi-center Lung Transplant Outcomes Group prospective cohort study. PGD was defined as Grade 3 at 48 or 72 hours, based on the 2016 PGD ISHLT guidelines.

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Background: Based on human and animal experimental studies, exposure to ambient carbon monoxide (CO) may be associated with cardiovascular disease outcomes, but epidemiological evidence of this link is limited. The number and distribution of ground-level regulatory agency monitors are insufficient to characterize fine-scale variations in CO concentrations.

Objectives: To develop a daily, high-resolution ambient CO exposure prediction model at the city scale.

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Recent biochemical, biophysical, and genetic studies have shown that heparan sulfate, a major component of the cellular glycocalyx, participates in infection of SARS-CoV-2 by facilitating the so-called open conformation of the spike protein, which is required for binding to ACE2. This review highlights the involvement of heparan sulfate in the SARS-CoV-2 infection cycle and argues that there is a high degree of coordination between host cell heparan sulfate and asparagine-linked glycans on the spike in enabling ACE2 binding and subsequent infection. The discovery that spike protein binding and infection depends on both viral and host glycans provides insights into the evolution, spread and potential therapies for SARS-CoV-2 and its variants.

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Background: Historically, resilience has often been conceptualized as the sustained lack of symptoms following trauma exposure. In line with a novel conceptualization of resilience as being dynamic over lifespan, determined by interacting biological and environmental factors, we examined the VA Mid-Atlantic Post Deployment Mental Health Repository (PDMH) comprised of 3876 US Military Veterans with and without PTSD diagnoses.

Methods: We performed regression modelling to study the relationship between resilience (measured with Connor Davidson Resilience Scale; CD-RISC), posttraumatic stress disorder (PTSD) severity (Davidson Trauma Scale; DTS), social support (Medical Outcome Study Social Support Survey; MOSSS), combat exposure (Combat Exposure Scale; CES), childhood trauma (Trauma Life Events Questionnaire; TLEQ), and demographic factors.

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  • Evaluating metagenomic software is crucial for enhancing the interpretation of metagenomes, and the CAMI II challenge focused on this by using complex datasets from numerous genomes and plasmids.
  • The analysis of 5,002 results from 76 software versions showed significant advancements in assembly, especially with long-read data, although challenges remained with related strains and genome recovery.
  • Findings indicated that while taxon profilers improved, they struggled with viruses and Archaea, highlighting the need for better reproducibility in clinical pathogen detection and guiding researchers in method selection based on efficiency and performance metrics.
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  • Large dams significantly impact riparian ecosystems by changing water flow, sediment distribution, and plant communities, generally leading to lower plant diversity downstream.
  • The removal of two large dams on Washington's Elwha River provided a unique opportunity to study how these changes affect plant diversity and composition over time.
  • Research found that, prior to removal, plant species richness was 41% lower downstream; however, six years post-removal, native species richness increased by about 31%, despite some mixed effects from sediment release.
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Background: This study examined the relationship between service user-rated personal recovery and clinician-rated and service user-rated clinical recovery. The relationships between different subdomains of clinical recovery and personal recovery were also assessed.

Methods: In total, 318 mental health service users with a psychosis diagnosis and their clinicians from 39 sites across Norway completed standardized questionnaires regarding personal recovery, clinical symptoms and psychosocial functioning.

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Protected area networks help species respond to climate warming. However, the contribution of a site's environmental and conservation-relevant characteristics to these responses is not well understood. We investigated how composition of nonbreeding waterbird communities (97 species) in the European Union Natura 2000 (N2K) network (3018 sites) changed in response to increases in temperature over 25 years in 26 European countries.

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Background: Posttraumatic stress disorder (PTSD) is associated with markers of accelerated aging. Estimates of brain age, compared to chronological age, may clarify the effects of PTSD on the brain and may inform treatment approaches targeting the neurobiology of aging in the context of PTSD.

Method: Adult subjects (N = 2229; 56.

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Ca/calmodulin-dependent protein kinase II alpha subunit (CaMKIIα) is a key neuronal signaling protein and an emerging drug target. The central hub domain regulates the activity of CaMKIIα by organizing the holoenzyme complex into functional oligomers, yet pharmacological modulation of the hub domain has never been demonstrated. Here, using a combination of photoaffinity labeling and chemical proteomics, we show that compounds related to the natural substance γ-hydroxybutyrate (GHB) bind selectively to CaMKIIα.

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  • Cardiac arrhythmias are a leading cause of sudden cardiac death, with Torsade de Pointes being a critical type arising from prolonged ventricular action potential duration (APD).
  • Researchers investigated a chemical, C28, which was found to activate the I potassium channel in a way that normalizes APD in the heart without affecting normal heart function.
  • The findings suggest that targeting the I channel's activation could offer new therapeutic strategies to prevent arrhythmias associated with existing medications that prolong APD.
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  • The tRNA ligase complex (tRNA-LC) is involved in splicing precursor tRNAs and mRNA during the unfolded protein response (UPR) but is vulnerable to oxidative damage due to its catalytic subunit's structure.
  • Research confirms that PYROXD1, an essential oxidoreductase, co-evolved with the tRNA-LC and helps maintain its activity by converting RTCB-bound NAD(P)H into an antioxidant form, thus protecting it from oxidative inactivation.
  • Mutations in PYROXD1 that lead to human muscle diseases only partially preserve tRNA-LC function, highlighting the importance of this protective mechanism in cellular processes.
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  • Siglecs are immune system receptors that bind to specific sialic acid-containing sugars, influencing immune cell functions, but their exact binding preferences and mechanisms are not completely understood.
  • Researchers created modified human HEK293 cells to study how different sialyltransferase genes and sulfotransferases affect the binding of Siglecs to various types of sialoglycans on cell surfaces.
  • The study revealed distinct binding patterns for Siglecs, highlighting how sulfation alters binding preferences, with a specific epitope linked to Siglec-3 implicated in late-onset Alzheimer's disease, showcasing the potential for this research to inform future discoveries in immunology and disease.
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Heparan sulfate (HS) proteoglycans bind extracellular proteins that participate in cell signaling, attachment and endocytosis. These interactions depend on the arrangement of sulfated sugars in the HS chains generated by well-characterized biosynthetic enzymes; however, the regulation of these enzymes is largely unknown. We conducted genome-wide CRISPR-Cas9 screens with a small-molecule ligand that binds to HS.

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Background: Bilateral cardiac sympathetic denervation (BCSD) is a surgical treatment for refractory ventricular arrhythmias. Although the procedure has shown efficacy at reducing cardiac arrhythmias, its impact on mental health is unknown. In the current study we examined associations between the BCSD procedure and mental health.

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Globus pallidus externa (GPe) is a nucleus in the basal ganglia circuitry involved in the control of movement. Recent studies have demonstrated a critical role of GPe cell types in Parkinsonism. Specifically increasing the function of parvalbumin (PV) neurons in the GPe has been found to facilitate motor function in a mouse model of Parkinson's disease (PD).

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Aberrant expression of CA125/MUC16 is associated with pancreatic ductal adenocarcinoma (PDAC) progression and metastasis. However, knowledge of the contribution of MUC16 to pancreatic tumorigenesis is limited. Here, we show that MUC16 expression is associated with disease progression, basal-like and squamous tumor subtypes, increased tumor metastasis, and short-term survival of PDAC patients.

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Climate warming is driving changes in species distributions and community composition. Many species have a so-called climatic debt, that is, shifts in range lag behind shifts in temperature isoclines. Inside protected areas (PAs), community changes in response to climate warming can be facilitated by greater colonization rates by warm-dwelling species, but also mitigated by lowering extirpation rates of cold-dwelling species.

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The CRISPR-Cas9 system has increased the speed and precision of genetic editing in cells and animals. However, model generation for drug development is still expensive and time-consuming, demanding more target flexibility and faster turnaround times with high reproducibility. The generation of a tightly controlled ObLiGaRe doxycycline inducible SpCas9 (ODInCas9) transgene and its use in targeted ObLiGaRe results in functional integration into both human and mouse cells culminating in the generation of the ODInCas9 mouse.

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  • The study looked at how well brain scans measure people's reactions to emotional faces and if different methods of analyzing this data give consistent results.
  • The researchers tested 42 healthy adults using brain scans on two different days to see if their brain responses were the same each time.
  • They found that while the average brain activity patterns matched over time, only a few specific brain areas showed strong consistency at the individual level.
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BRCA1 promotes the DNA end resection and RAD51 loading steps of homologous recombination (HR). Whether these functions can be uncoupled, and whether mutant proteins retaining partial activity can complement one another, is unclear and could affect the severity of BRCA1-associated Fanconi anemia (FA). Here we generated a Brca1 mouse with a coiled-coil (CC) domain deletion.

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gene mutations impair homologous recombination (HR) DNA repair, resulting in cellular senescence and embryonic lethality in mice. Therefore, BRCA1-deficient cancers require adaptations that prevent excessive genomic alterations from triggering cell death. RNF168-mediated ubiquitination of γH2AX at K13/15 (ub-H2AX) serves as a recruitment module for the localization of 53BP1 to DNA break sites.

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Protein N-glycosylation is an essential and highly conserved posttranslational modification found in all eukaryotic cells. Yeast, plants and mammalian cells, however, produce N-glycans with distinct structural features. These species-specific features not only pose challenges in selecting host cells for production of recombinant therapeutics for human medical use but also provide opportunities to explore and utilize species-specific glycosylation in design of vaccines.

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