91,684 results match your criteria: "University of Southern California; gnedeva@usc.edu.[Affiliation]"

Article Synopsis
  • The subseafloor igneous basement contains a vast microbial habitat, but little is known about the life that exists there, especially in older sections over 65 million years old.
  • Recent research tested this by analyzing samples from the Louisville Seamount Chain, finding varied cell biomass indicating the presence of microbial life in rocks older than 65 million years.
  • The dominant bacterial genes found suggest active microbial processes related to nitrogen, sulfur, metal transformations, and hydrocarbon breakdown, highlighting a much broader range of subseafloor life than previously recognized.
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Objective: To assess the carbon footprint, accessibility, and diagnostic performance of an expedited 'One-Stop' prostate cancer (PCa) diagnostic pathway.

Materials And Methods: A total of 1083 consecutive patients undergoing magnetic resonance imaging (MRI) followed by transrectal ultrasound fusion-guided prostate biopsy (PBx) were identified from a prospective database. The patients were divided according to the diagnostic pathway: One-Stop, with MRI and same-day PBx (3 hours apart), or Standard, with MRI followed by a second visit for PBx.

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The widespread demand for battery-powered technologies has propelled the search for efficient and commercially viable electrode materials with fast-charging abilities. Reported herein is an MoS-expanded graphite (EG) composite as a stable and high-rate lithium-ion battery (LIB) anode, delivering specific capacities of 796 mAh g at 0.5 A g and 320 mAh g at 20 A g over 400 cycles.

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Genetically Engineered Mouse Models for Alzheimer Disease and Frontotemporal Dementia: New Insights from Single-Cell and Spatial Transcriptomics.

Am J Pathol

December 2024

Department of Physiology and Biophysics, Center for Neurodegeneration and Regeneration, Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, Los Angeles, California; Neuromedicine PhD Program, Programs in Biomedical and Biological Sciences (PIBBS), Keck School of Medicine, University of Southern California, Los Angeles, California; Neuroscience Graduate Program, University of Southern California, Los Angeles, California. Electronic address:

Article Synopsis
  • Neurodegenerative diseases like Alzheimer’s, Parkinson’s, and Huntington’s are linked to protein aggregation, prompting research on genetically engineered animal models to study these conditions and test treatments.
  • The article emphasizes mouse models of Alzheimer’s and frontotemporal dementia, highlighting those that have contributed significantly to understanding these diseases.
  • Recent findings from advanced techniques, like single-cell transcriptomics, are summarized, noting the limitations of current models but expressing optimism for their role in advancing research.
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Considerations for social networks and health data sharing: An overview.

Ann Epidemiol

December 2024

Duke Network Analysis Center, Duke University, Durham, NC, USA; Department of Sociology, Duke University, Durham, NC, USA.

The use of network analysis as a tool has increased exponentially as more clinical researchers see the benefits of network data for modeling of infectious disease transmission or translational activities in a variety of areas, including patient-caregiving teams, provider networks, patient-support networks, and adoption of health behaviors or treatments, to name a few. Yet, relational data such as network data carry a higher risk of deductive disclosure. Cases of reidentification have occurred and this is expected to become more common as computational ability increases.

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Background: Thyroid cancer, a common endocrine malignancy, has seen increasing incidence, making lymph node metastasis (LNM) a critical factor for recurrence and survival. Radiomics and deep learning (DL) advancements offer the potential for improved LNM prediction using CT and MRI, though challenges in diagnostic accuracy remain.

Methods: A systematic review and meta-analysis were conducted per established guidelines, with searches across PubMed, Scopus, Web of Science, and Embase up to February 15, 2024.

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Association of residency application data with subsequent general surgery residency graduate performance.

Surgery

December 2024

Department of Surgery, Harbor-UCLA (University of California, Los Angeles) Medical Center, Torrance, CA; The Lundquist Institute, Torrance, CA. Electronic address:

Article Synopsis
  • The study examines the relationship between residency application data and the subsequent performance of surgical graduates, focusing on traits like surgical judgment, leadership, and medical knowledge.
  • Despite evaluating 258 graduates and various factors such as USMLE scores and clerkship honors, the findings reveal only weak associations with overall performance ratings.
  • Ultimately, the research concludes that the analyzed preresidency variables do not effectively predict residency graduate performance, suggesting a disconnect between application data and actual performance in residency.
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Article Synopsis
  • Endurance training enhances hepatic gluconeogenesis, especially in the presence of norepinephrine (NE), even without other hormones.
  • Trained rat liver cells show significantly higher gluconeogenesis and lactate uptake compared to untrained controls, particularly when stimulated by NE.
  • Additionally, trained hepatocytes exhibit increased glucose production in the presence of palmitate, underscoring the metabolic adaptations resulting from endurance training.
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Advancements in cancer therapy have increasingly focused on leveraging the synergistic effects of combining immunotherapy with other treatment modalities, facilitated by the use of innovative nanoplatforms. These strategies aim to augment the efficacy of standalone treatments while addressing their inherent limitations. Nanoplatforms enable precise delivery and controlled release of therapeutic agents, which enhances treatment specificity and reduces systemic toxicity.

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Digital Papillary Adenocarcinoma at the Site of 5 Years of Recurrent Paronychia: Case Report and Literature Review.

Case Rep Oncol Med

December 2024

Hand and Upper Extremity Surgery, Barrington Orthopedic Specialists, Schaumburg, Illinois, USA.

Article Synopsis
  • Digital papillary adenocarcinoma (DPA) is a rare and often misdiagnosed malignant tumor, commonly mistaken for benign conditions, leading to delayed diagnosis and treatment.
  • A 57-year-old man with recurrent finger infections was ultimately diagnosed with DPA after a surgical evaluation and biopsy revealed both infection and the tumor, necessitating surgical removal.
  • Accurate diagnosis is vital due to the tumor's tendency for recurrence and metastasis, particularly to the lungs and lymph nodes, and current treatment primarily involves surgical excision with focus on achieving negative margins.
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SPOCK2 controls the proliferation and function of immature pancreatic β-cells through MMP2.

Exp Mol Med

January 2025

Institute of Molecular Biology and Biotechnology, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznanskiego 6, Poznan, 61-614, Poland.

Human pluripotent stem cell-derived β-cells (SC-β-cells) represent an alternative cell source for transplantation in diabetic patients. Although mitogens could in theory be used to expand β-cells, adult β-cells very rarely replicate. In contrast, newly formed β-cells, including SC-β-cells, display higher proliferative capacity and distinct transcriptional and functional profiles.

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Subtypes of brain change in aging and their associations with cognition and Alzheimer's disease biomarkers.

Neurobiol Aging

March 2025

Center for Lifespan Changes in Brain and Cognition, Department of Psychology, University of Oslo, Oslo 0373, Norway.

Structural brain changes underlie cognitive changes and interindividual variability in cognition in older age. By using structural MRI data-driven clustering, we aimed to identify subgroups of cognitively unimpaired older adults based on brain change patterns and assess how changes in cortical thickness, surface area, and subcortical volume relate to cognitive change. We tested (1) which brain structural changes predict cognitive change (2) whether these are associated with core cerebrospinal fluid (CSF) Alzheimer's disease biomarkers, and (3) the degree of overlap between clusters derived from different structural modalities in 1899 cognitively healthy older adults followed up to 16 years.

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Introduction: Diffusion tensor image analysis along the perivascular space (DTI-ALPS) index was proposed for assessing glymphatic clearance function. This study evaluated DTI-ALPS as a biomarker for cerebral small vessel disease (cSVD) related vascular cognitive impairment and dementia (VCID).

Methods: Four independent cohorts were examined.

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This study (1) characterized the effects of channel interaction using spectral blurring, (2) evaluated an image-guided electrode selection (IGES) method aiming to reduce channel interaction, and (3) investigated the impact of electrode placement factors on the change in performance by condition. Twelve adult MED-EL (Innsbruck, Austria) cochlear implant recipients participated. Performance was compared across six conditions: baseline (no blurring), all blurred, apical blurred, middle blurred, basal blurred, and IGES.

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Anti-IH is a common cold agglutinin that is typically clinically insignificant. We present a case that resulted in hemolysis. A 32-year-old male patient with transfusion-independent beta-thalassemia intermedia presented with symptomatic anemia.

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Myeloid cell leukemia 1 (MCL-1) is a member of the B-cell lymphoma 2 protein family and has anti-apoptotic functions. Deregulation of MCL-1 has been reported in several cancers, including lung and breast cancer. In the present study, the association of MCL-1 expression with molecular features in colorectal cancer (CRC) has been highlighted.

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Higher-order transient membrane protein structures.

Proc Natl Acad Sci U S A

January 2025

Laboratory of Molecular Neurobiology and Biophysics, The Rockefeller University, New York, NY 10065.

This study shows that five membrane proteins-three GPCRs, an ion channel, and an enzyme-form self-clusters under natural expression levels in a cardiac-derived cell line. The cluster size distributions imply that these proteins self-oligomerize reversibly through weak interactions. When the concentration of the proteins is increased through heterologous expression, the cluster size distributions approach a critical distribution at which point a phase transition occurs, yielding larger bulk phase clusters.

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Objective: To test whether enrolling in traditional Medicare (TM) or Medicare Advantage (MA) at age 65 reduces mental healthcare utilization among individuals with mental health symptoms and low or moderate family incomes.

Study Setting And Design: We employ a fuzzy regression discontinuity design, comparing the likelihood of having an outpatient mental health visit or a psychotropic drug fill among individuals younger than or older than the age 65 Medicare eligibility threshold.

Data Sources And Analytic Sample: We analyze 2014-2021 Medical Expenditure Panel Survey data.

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In Southern U.S. states with high HIV incidence and low HIV Pre-Exposure Prophylaxis (PrEP) uptake, enhanced efforts to increase interest in and willingness to use PrEP are needed.

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Social Engagement and Neurocognition in Latino and Non-Latino White Older Persons with HIV.

AIDS Behav

December 2024

Department of Medicine (Division of Geriatrics), Department of Psychiatry and Behavioral Sciences, Duke University, Durham, NC, USA.

The present study investigated differences in the quantity and quality of social engagement, and their associations with neurocognition among older Latino and non-Latino White persons with HIV (PWH). Participants were age 50 + community-dwelling PWH living in southern California (n = 116; 50% Latino [53% Spanish-speaking], 50% non-Latino White; Age: M = 58.03; Education: M = 13.

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As an alternative to assessments performed by human experts, artificial intelligence (AI) is currently being used for screening fundus images and monitoring diabetic retinopathy (DR). Although AI models can provide quasi-clinician diagnoses, they rarely offer new insights to assist clinicians in predicting disease prognosis and treatment response. Using longitudinal retinal imaging data, we developed and validated a predictive model for DR progression: AI-driven Diabetic Retinopathy Progression Prediction Algorithm (ADRPPA).

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