Publications by authors named "Singer D"

Oxidative stress is universal to all cell types, including cancer. It is elicited by a surplus of reactive oxygen species (ROS) or a reduced cellular ability to defend against those. At low levels (oxidative eustress), this induces altered cellular signaling, while at higher levels (oxidative distress), cellular toxicity and non-specific redox signaling become apparent.

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Introduction: Dementia is underdiagnosed in the United States. Understanding of older adults' experiences with screening is needed to optimize diagnosis.

Methods: US adults ages 65 to 80 ( = 1298) were surveyed on experiences with cognitive screening and blood biomarker (BBM) testing.

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Importance: Dual-eligible older adults rely on Medicaid to pay for Medicare premiums and cost sharing in addition to supplemental services including dental and long-term care. However, the unique experiences of dual-eligible older adults with Medicaid unwinding remain unknown.

Objective: To assess the awareness and experiences of dual-eligible older adults with Medicaid redetermination.

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Article Synopsis
  • Respiratory syncytial virus (RSV) commonly causes respiratory illnesses, especially severe in adults over 60 or those with chronic conditions; a study examined the cost-effectiveness of the RSVPreF3 vaccine for this age group in the US.* -
  • A multi-cohort Markov model compared outcomes of not vaccinating versus a one-time vaccination, estimating that vaccinating approximately 52.7 million older adults would save nearly 244,424 quality-adjusted life years (QALYs) at a societal cost of about $4.5 billion over five years.* -
  • The analysis indicated that the adjuvanted RSVPreF3 vaccine is cost-effective, with an incremental cost-effectiveness ratio (
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Both CO2 retention, or hypercapnia, and skeletal muscle dysfunction predict higher mortality in critically ill patients. Mechanistically, muscle injury and reduced myogenesis contribute to critical illness myopathy, and while hypercapnia causes muscle wasting, no research has been conducted on hypercapnia-driven dysfunctional myogenesis in vivo. Autophagy flux regulates myogenesis by supporting skeletal muscle stem cell - satellite cell - activation, and previous data suggest that hypercapnia inhibits autophagy.

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Introduction: Providing adequate nutrition to preterm infants to achieve postnatal growth similar to intrauterine growth remains challenging due to the unpredictability of individual determinants.

Material And Methods: We used a calculation program for infant incubators to compare the estimated heat balance with the caloric intake and growth rate in Very Low Birth Weight Infants (VLBWI).

Results And Discussion: A group of 32 VLBWI was studied over a period of 14-28 days.

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Background: Military personnel face unique stressors to their mental health.

Objectives: To estimate the prevalence of serious psychological distress among active-duty U.S.

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Bromodomain 4 (BRD4), a key regulator with pleiotropic functions, plays crucial roles in cancers and cellular stress responses. It exhibits dual functionality: chromatin-bound BRD4 regulates remodeling through its histone acetyltransferase (HAT) activity, while promoter-associated BRD4 regulates transcription through its kinase activity. Notably, chromatin-bound BRD4 lacks kinase activity, and RNA polymerase II (RNA Pol II)-bound BRD4 exhibits no HAT activity.

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Military training areas can host important biodiversity, due to the preservation of diverse, nutrient-poor historical cultural landscapes and an insect-friendly disturbance regime. In Europe, many training areas were abandoned after the end of the cold war in 1991 and the withdrawal of the Allied and Soviet forces. Many of these are now protected areas, and current management strategies vary from rewilding to active habitat management such as grazing or mowing.

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Study Objective: To evaluate the clinical effect, safety, and clinical outcomes of focused transesophageal echocardiography (TEE) in the evaluation of critically ill patients in the emergency department (ED) and ICUs.

Methods: We established a prospective, multicenter, observational registry involving adult critically ill patients in whom focused TEE was performed for evaluation of out-of-hospital cardiac arrest (OHCA), inhospital cardiac arrest, evaluation of undifferentiated shock, hemodynamic monitoring, and/or procedural guidance in the ED, ICU, or operating room setting. The primary objective of the current investigation was to evaluate the clinical influence and safety of focused, point-of-care TEE in critically ill patients.

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Hydrophobic organic chemicals (HOCs) that enter the aquatic environment often negatively impact organisms, endangering aquatic biodiversity. Understanding sediment sorption equilibria for these chemicals can properly direct mitigation efforts. In addition, many HOCs of environmental concern lack sufficient environmental fate data to adequately assess their risk to ecosystems and humans.

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Unlabelled: In EAE, a mouse model of multiple sclerosis, immunization with MOG autoantigen results in the generation of Th1/Th17 T cells in the periphery. MOG-specific T cells then invade into the central nervous system (CNS), resulting in neuronal demyelination. Microglia, innate immune cells in the CNS are known to regulate various neuronal diseases.

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Article Synopsis
  • For over 30 years, advancements in lab tech and computer science have led to the growth of cancer informatics.
  • Current software tools are essential for cancer research, supporting various aspects of the research process.
  • The integration of these technologies has transformed how cancer research is conducted.
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The availability of direct-to-consumer, at-home medical tests has grown over the last decade, but it is unknown how frequently older adults purchase at-home tests, how they perceive such tests, and how interested they are in using at-home tests in the future. We conducted a cross-sectional, nationally representative survey of non-institutionalized US adults aged 50 to 80 about their previous use of, perceptions of, and future intentions to use at-home medical tests. We found that nearly half of older adults (48.

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  • A study was conducted on individuals aged 70 and older to assess the frequency and burden of atrial fibrillation (AF) using a 14-day electrocardiograph monitor.
  • Out of 5,684 participants, 4.4% were found to have AF, with the majority having paroxysmal AF of low burden; the median time spent in AF was only about 75 minutes.
  • The research highlighted that while most AF cases had low burden, a significant portion had extended episodes, raising potential concerns for increased stroke risk and suggesting the need for targeted AF screening approaches.
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Background: Persistence and adherence to oral anticoagulants (OACs) is crucial for its effectiveness in stroke prevention in atrial fibrillation (AF). We aimed to assess the impact of different ascertainment methods on estimated persistence rates.

Methods: We conducted a retrospective cohort study based on the Medicare claims data (01/01/2013-12/31/2019).

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Background: Atrial fibrillation (AF) often remains undiagnosed, and it independently raises the risk of ischemic stroke, which is largely reversible by oral anticoagulation. Although randomized trials using longer term screening approaches increase identification of AF, no studies have established that AF screening lowers stroke rates.

Objectives: To address this knowledge gap, the GUARD-AF (Reducing Stroke by Screening for Undiagnosed Atrial Fibrillation in Elderly Individuals) trial screened participants in primary care practices using a 14-day continuous electrocardiographic monitor to determine whether screening for AF coupled with physician/patient decision-making to use oral anticoagulation reduces stroke and provides a net clinical benefit compared with usual care.

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  • - Assessing pain in newborns in the NICU is challenging due to the subjective methods currently used, prompting a study to compare an AI facial recognition system's effectiveness against healthcare professionals' evaluations.
  • - The study, which analyzed data from an eye-tracking study, found significant differences in AI-generated metrics of arousal and valence across various pain stimuli, with strong correlation (r = 0.84) between AI results and expert ratings.
  • - Eleven specific facial action units related to neonatal pain were identified, indicating that AI technology has the potential to improve objective pain assessment in newborns by accurately analyzing their facial expressions in response to different pain levels.
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Reduced skeletal muscle mass and oxidative capacity coexist in patients with pulmonary emphysema and are independently associated with higher mortality. If reduced cellular respiration contributes to muscle atrophy in that setting remains unknown. Using a mouse with genetically induced pulmonary emphysema that recapitulates muscle dysfunction, we found that reduced activity of succinate dehydrogenase (SDH) is a hallmark of its myopathic changes.

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Biocrusts represent associations of lichens, green algae, cyanobacteria, fungi and other microorganisms, colonizing soils in varying proportions of principally arid biomes. The so-called grit crust represents a recently discovered type of biocrust situated in the Coastal Range of the Atacama Desert (Chile) made of microorganisms growing on and in granitoid pebbles, resulting in a checkerboard pattern visible to the naked eye on the landscape scale. This specific microbiome fulfills a broad range of ecosystem services, all probably driven by fog and dew-induced photosynthetic activity of mainly micro-lichens.

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Heterotrophic protists are vital in Earth's ecosystems, influencing carbon and nutrient cycles and occupying key positions in food webs as microbial predators. Fossils and molecular data suggest the emergence of predatory microeukaryotes and the transition to a eukaryote-rich marine environment by 800 million years ago (Ma). Neoproterozoic vase-shaped microfossils (VSMs) linked to Arcellinida testate amoebae represent the oldest evidence of heterotrophic microeukaryotes.

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The American Lung Association's "State of the Air" 2023 report reveals almost 36% of Americans live with unhealthy levels of air pollution. Studies link air pollution with acute respiratory symptoms and exacerbation of respiratory and cardiovascular diseases. Differential air pollution exposures between white and nonwhite communities are significant components of environmental injustices.

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