236 results match your criteria: "University of Tennessee Health Science Center Memphis[Affiliation]"

Background: The bodily distribution of melanoma is frequently reported without consideration of the skin surface area, which could be misleading in melanoma risk regarding anatomical sites.

Objectives: To gain insights into the melanoma distribution on the body surface when the body surface area is considered.

Methods: Cutaneous melanoma data were extracted from a single dermatopathology laboratory, and the relative density from each body site was calculated by taking into consideration the skin surface area.

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  • Serovar L2 (Ct) divides through a unique polarized budding process instead of traditional binary fission, due to its lack of FtsZ, a protein common in other bacteria.
  • The assembly of the divisome, essential for cell division, is initiated by FtsK, which forms specific focal points at the site where new daughter cells will emerge, signifying its role in the division process.
  • Research indicates that FtsK is crucial for recruiting other proteins to the divisome, while MreB, though necessary for forming peptidoglycan rings, does not serve as the primary scaffold for divisome assembly.
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  • Advances in artificial intelligence (AI) are leading to increased use of data-driven algorithms in medicine, but their complex behavior renders them unreliable for clinicians, prompting the need for explainable artificial intelligence (XAI).
  • A systematic review was conducted to analyze the application of XAI in breast cancer detection and risk prediction, covering studies from January 2017 to July 2023, identifying 30 relevant peer-reviewed studies.
  • The findings indicated that SHapley Additive exPlanations (SHAP) is the most commonly used model-agnostic XAI technique in this area, particularly effective for explaining predictions from tree-based ensemble machine learning models, enhancing the transparency and trustworthiness of AI in healthcare.
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  • GPRC6A is a G-protein coupled receptor that plays a role in regulating energy metabolism and sex hormone production, activated by various ligands like cations and testosterone.
  • A structural model was created using Alphafold2 to identify key binding sites for ligands, including an orthosteric site and two allosteric modulator sites.
  • Research shows that Ocn peptides function as positive allosteric modulators by binding to a unique site in GPRC6A's Venus fly trap domain, while certain mutations disrupt this activation, enhancing understanding of ligand-receptor interactions.
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  • Autotaxin (ATX) is an enzyme that produces lysophosphatidic acid (LPA), which influences cancer spread, treatment resistance, and immune responses in tumors.
  • Researchers discovered that myeloid cells in melanoma biopsies highly express ATX and studied its effect on tumor immunity in two melanoma models (spontaneous and experimental).
  • Knockout of ATX in specific myeloid cells reduced melanoma metastasis by over 50%, revealing important immune differences in the tumor environment that change depending on the type of model used.
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  • A study utilizing data from the Veterans Health Administration examined trends in the initial treatment regimens for newly diagnosed hypertension from 2000 to 2019, focusing on the use of monotherapy versus dual therapy.
  • Initial monotherapy prescriptions increased across all levels of pretreatment systolic blood pressure, while the use of dual therapy declined over the same period.
  • The findings highlight a gap between recommended treatment guidelines and the actual medications prescribed to Veterans with high blood pressure, particularly those with systolic BP levels of 160 mm Hg or higher.
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Objectives: To investigate differences in symptoms, allergy comorbidities, and eosinophilic inflammation at the time of diagnosis for patients with eosinophilic esophagitis (EoE) based on gender, race, and age of onset.

Methods: A retrospective study was conducted at a multidisciplinary EoE clinic; the correlation between histological findings, previously identified symptoms, associated comorbidities, and demographics including gender, race, as well as age of onset was examined. Chi-squared and Student's -tests were utilized for statistical analysis.

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  • This study evaluates cardiovascular health (CVH) from early childhood to late adolescence, finding that while most children maintain high CVH during early years, there is a noticeable decline by late adolescence.
  • Using data from 1530 youths, researchers calculated CVH scores based on behaviors like diet and physical activity, revealing stability in scores until late adolescence when only 39.4% had high CVH.
  • The study highlights key sociodemographic factors associated with high CVH, such as being non-Hispanic White and having educated parents, suggesting that behavioral factors are crucial for targeted cardiovascular disease prevention efforts.
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  • Probiotics are beneficial microorganisms that may improve health, but their use in pediatric kidney transplant recipients is not well studied.
  • A survey of pediatric nephrologists revealed that about 42.2% have prescribed probiotics to these patients primarily for treating antibiotic-associated diarrhea, with concerns about safety impacting their use.
  • There is considerable variation in practice among nephrologists regarding probiotic use, emphasizing the need for more research on safety and effectiveness in transplant recipients.
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Porous Nano-Fiber Structure of Modified Electrospun Chitosan GBR Membranes Improve Osteoblast Calcium Phosphate Deposition in Osteoblast-Fibroblast Co-Cultures.

Mar Drugs

March 2024

Department of Biomedical Engineering, University of Tennessee Health Science Center-Memphis Joint Graduate Biomedical Engineering Program, The University of Memphis, Memphis, TN 38152, USA.

Desirable characteristics of electrospun chitosan membranes (ESCM) for guided bone regeneration are their nanofiber structure that mimics the extracellular fiber matrix and porosity for the exchange of signals between bone and soft tissue compartments. However, ESCM are susceptible to swelling and loss of nanofiber and porous structure in physiological environments. A novel post-electrospinning method using di-tert-butyl dicarbonate (tBOC) prevents swelling and loss of nanofibrous structure better than sodium carbonate treatments.

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A 4-month-old previously healthy female presented with persistent nonbloody, nonbilious emesis, decreased urine output, weight loss, fussiness, and lethargy. Serum levels of calcium were increased at 14.1 mg/dL, serum phosphate decreased at 1.

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Developing new ceramide analogs against non-small cell lung cancer (NSCLC).

Am J Cancer Res

January 2024

Department of Pathology, Winthrop P. Rockefeller Cancer Institute, University of Arkansas for Medical Sciences 4301 W. Markham St., Little Rock, AR 72205, USA.

Non-small cell lung cancer (NSCLC) constitutes the predominant form of lung cancer and stands as the leading cause of cancer-related mortality in the United States. Conventional chemotherapy and radiotherapy yield suboptimal responses in a significant portion of lung cancer patients, resulting in a discouraging 5-year survival rate of approximately 15%. Despite advancements in targeted therapy and immunotherapy, many NSCLC patients exhibit either negligible or partial responses, emphasizing the pressing necessity for the discovery of innovative anti-cancer agents.

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High-throughput metabolomics data provide a detailed molecular window into biological processes. We consider the problem of assessing how the association of metabolite levels with individual (sample) characteristics such as sex or treatment may depend on metabolite characteristics such as pathway. Typically this is one in a two-step process: In the first step we assess the association of each metabolite with individual characteristics.

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Background Our aim was to investigate the association of coronary artery calcium (CAC) with cognitive function in adults with impaired glucose tolerance or type 2 diabetes. Methods and Results The Diabetes Prevention Program was a randomized controlled trial comparing an intensive lifestyle intervention, metformin, or placebo for prevention of type 2 diabetes among patients with prediabetes. After 3 years, intensive lifestyle intervention and placebo were stopped, the metformin arm was unmasked, and participants continued in the DPPOS (Diabetes Prevention Program Outcomes Study).

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  • Acute kidney injury (AKI) is a significant issue in hospitalized patients with sickle cell disease (SCD), leading to higher rates of complications and death, making early detection crucial.
  • A machine-learning model was developed using continuous physiological data from 1,178 adult SCD patient encounters to predict AKI, identifying it in 82 patients based on established criteria.
  • The model demonstrated high accuracy in predicting AKI onset, achieving up to 91% reliability within 12 hours and 82% within 48 hours, highlighting potential for early intervention and better patient outcomes.
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Effect of desensitizing agents on the resin bond strength to sound dentin.

Odontology

April 2024

Department of Cariology, Restorative Sciences and Endodontics, University of Michigan-School of Dentistry, 1011 N. University Avenue, Ann Arbor, MI, 48109, USA.

This study aimed to evaluate the effect of dentin hypersensitivity treatments on immediate and long-term shear bond strength (SBS) of composite restorations. Ninety non-carious extracted human molars were cut to expose dentin, which was embedded in acrylic resin, and randomly divided into three groups (n = 30/group) according to surface treatment: 1) no treatment (C and C*; control); 2) silver diamine fluoride with potassium iodide (SDF/KI and SDF/KI*; Riva Star); and 3) nano-hydroxyapatite (nHAp and nHAp*; PrevDent). The specimens were etched through the etch-and-rinse technique, followed by universal adhesive application and resin composite cylinders (2.

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  • The study focuses on the predictability of adaptive genetic changes, particularly in gene family expansions and contractions, within the redheaded pine sawfly, a species evolved from angiosperm feeders.
  • Researchers found recent expansions in specific gene families related to chemosensory, detoxification, and immunity functions, indicating positive selection among gustatory receptors that likely help detect bitter compounds.
  • The findings support the idea that gene families involved in ecological interactions can undergo predictable expansions and contractions in response to new selection pressures, suggesting a need for more comparative studies across various insect species.
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The primary care (PC) physician workforce has consistently been projected as requiring additional numbers to meet the needs of the U.S. The Health Resources and Service Administration (HRSA) has reported the PC nurse practitioner (NP) workforce to be 90,000 NPs more than required to meet the PC needs of the U.

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Background: Management of penetrating chest injuries with a positive pericardial window (PW) are presumed cardiac injuries and traditionally result in sternotomy. However, there is some evidence in the literature that select patients can be managed with PW, lavage, and drainage (PWLD).

Methods: All patients with penetrating chest trauma who underwent PW and/or sternotomy over a 5-year period were identified.

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Lysophosphatidic acid induces proliferation and osteogenic differentiation of human dental pulp stem cell through lysophosphatidic acid receptor 3/extracellular signal-regulated kinase signaling axis.

J Dent Sci

July 2023

Department of Oral Physiology, Periodontal Diseases Signaling Network Research Center, Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan, Republic of Korea.

Background/purpose: Human dental pulp stem cells (hDPSCs) possess excellent proliferative and osteogenic differentiation potentials. This study aimed to elucidate the role of lysophosphatidic acid (LPA) signaling in the proliferation and osteogenic differentiation of hDPSCs.

Materials And Methods: hDPSCs were treated with LPA and proliferation was measured using the cell counting kit-8 assay.

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Objective: To describe a case of bifid intratemporal facial nerves without associated middle or inner ear abnormalities encountered on computed tomography (CT) imaging during preoperative preparation for unilateral cochlear implant placement in an adult male with profound sensorineural hearing loss (SNHL).

Methods: A rare case of bilateral bifid intratemporal facial nerves in an adult male is presented. The finding's impact on approach to safe cochlear implantation is discussed.

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Racial disparities in cardiovascular disease are unjust, systematic, and preventable. Social determinants are a primary cause of health disparities, and these include factors such as structural and overt racism. Despite a number of efforts implemented over the past several decades, disparities in cardiovascular disease care and outcomes persist, pervading more the outpatient rather than the inpatient setting, thus putting racial and ethnic minority groups at risk for hospital readmissions.

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The adequate characterization of the pharmacokinetics of a drug used in pediatrics is a mainstay of pediatric development programs and is critical for accurate dose selection in pediatrics. Analysis approaches can impact the estimation and characterization of pediatric pharmacokinetic parameters. Simulations were conducted to compare the performance of different approaches for analyzing pediatric pharmacokinetic data in the presence of extensive data from adult studies.

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Laryngeal angiomyolipoma is a rare tumor with few reported cases in the literature. The case report explains a 62-year-old man who presents with dyspnea and found to have a laryngeal angiomyolipoma staining CD34 positive, but HMB45 and Melan-A negative.

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