1,988 results match your criteria: "Rhode Island Hospital Department of Pathology[Affiliation]"

Importance: Blood culture (BC) use benchmarks in US hospitals have not been defined.

Objective: To characterize BC use in adult intensive care units (ICUs) and wards in US hospitals.

Design, Setting, And Participants: A retrospective cross-sectional study of BC use in adult medical ICUs, medical-surgical ICUs, medical wards, and medical-surgical wards from acute care hospitals from the 4 US geographic regions was conducted.

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Androgen receptor (AR) signaling is a target in prostate cancer therapy and can be treated with non-steroidal anti-androgens (NSAA) including enzalutamide, and apalutamide for patients with advanced disease. Metastatic castration-resistant prostate cancer (mCPRC) develop resistance becomes refractory to therapy limiting patient overall survival. Darolutamide is a novel next-generation androgen receptor-signaling inhibitor that is FDA approved for non-metastatic castration resistant prostate cancer (nmCRPC).

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In hormone receptor-positive and HER2-negative breast cancers, a growing number of revolutionary personalized therapies are in clinical use or trials, such as CDK4/6 inhibitors, immune checkpoint inhibitors, and PIK3CA inhibitors. Those treatment options are largely driven by the presence or absence of genomic alterations in the tumor. Therefore, molecular profiling is often performed during disease progression.

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Human recombination-activating gene (RAG) deficiency can manifest with distinct clinical and immunological phenotypes. By applying a multiomics approach to a large group of -mutated patients, we aimed at characterizing the immunopathology associated with each phenotype. Although defective T and B cell development is common to all phenotypes, patients with hypomorphic variants can generate T and B cells with signatures of immune dysregulation and produce autoantibodies to a broad range of self-antigens, including type I interferons.

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Article Synopsis
  • Alzheimer's disease (AD) is characterized by various pathological features including amyloid-β deposition and tau hyperphosphorylation, with cerebral microvascular dysfunction likely playing a role in its progression.
  • Researchers investigated the microvascular responses and potassium channel activity in an AD mouse model induced by streptozotocin (STZ), using behavioral tests and cellular assays.
  • The study found that STZ-AD mice showed poorer performance on behavioral tests and had impaired microvascular responses, which were further deteriorated by exposure to soluble Aβ, indicating a potential link between microvascular dysfunction and AD pathology.
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The study explored the efficacy of Salvia chudaei ethanolic extract in managing hyperlipidemia, hyperglycemia, and oxidative stress induced by Triton X-100 in Wistar rats. Twenty-four rats were divided into four groups: Control, S. chudaei-treated, Triton-induced hyperlipidemic, and a combination of Triton + S.

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Background: Glioblastoma (GBM) has a median survival of <2 years. Pexidartinib (PLX3397) is a small-molecule inhibitor of CSF1R, KIT, and oncogenic FTL3, which are implicated in GBM treatment resistance. Results from glioma models indicate that combining radiation therapy (RT) and pexidartinib reduces radiation resistance.

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Background: Clinical guidelines have concluded that there are insufficient data to provide recommendations for the hemoglobin threshold for the use of red cell transfusion in patients with acute myocardial infarction (MI) and anemia. After the recent publication of the Myocardial Infarction and Transfusion (MINT) trial, we performed an individual patient-level data meta-analysis to evaluate the effect of restrictive versus liberal blood transfusion strategies.

Methods: We conducted searches in major databases.

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The promise of injection of extracellular matrix (ECM) from animal hearts as a treatment of myocardial ischemia has been limited by immune reactions and harsh ECM-damaging extraction procedures. We developed a novel method to produce lab-grown human three-dimensional (3-D) acellular ECM particles from human mesenchymal stem cells (MSCs) to mitigate product variability, immunogenicity, and preserve ECM architecture. We hypothesized that intramyocardial injection (I/M) of this novel ECM (dia ∼ 200 microns) would improve cardiac function in a postmyocardial infarction (MI) murine model.

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We used molecular testing to examine the causes of bloody diarrhea in a multicenter study of pediatric gastroenteritis. Pathogens typically associated with bloody diarrhea were detected in less than half of cases, and inappropriate antibiotic use was common, supporting the use of stool testing in patients with bloody diarrhea.

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Recent advancements in biomarkers and molecular diagnostics in hormonal receptor-positive breast cancer.

Histopathology

December 2024

Department of Pathology and Laboratory Medicine, Rhode Island Hospital and Lifespan Medical Center, Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA.

Molecular applications have limited use in breast cancer compared to other cancer types. In recent years, with an improving appreciation of the molecular genetics of breast cancer and innovative novel targeted and immune-mediated therapeutics, opportunities have arisen for more biomarker analysis and molecular applications in the diagnosis and treatment of both locally advanced and metastatic breast cancers. In hormone receptor-positive, HER2-negative breast cancers, a growing number of revolutionized personalized therapies are in clinical use or on trials, such as CDK4/6 inhibitors and immune checkpoint inhibitors in adjuvant and neoadjuvant settings, and PIK3CA inhibitors in metastatic disease.

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Introduction: In response to the COVID-19 pandemic, we rapidly implemented a plasma coordination center, within two months, to support transfusion for two outpatient randomized controlled trials. The center design was based on an investigational drug services model and a Food and Drug Administration-compliant database to manage blood product inventory and trial safety.

Methods: A core investigational team adapted a cloud-based platform to randomize patient assignments and track inventory distribution of control plasma and high-titer COVID-19 convalescent plasma of different blood groups from 29 donor collection centers directly to blood banks serving 26 transfusion sites.

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Identification of a Novel Mesenchymal Stem Cell-Related Signature for Predicting the Prognosis and Therapeutic Responses of Bladder Cancer.

Stem Cells Int

November 2024

Institute of Urology, Key Laboratory of Gansu Province for Urological Diseases, Gansu Urological Clinical Center, Lanzhou University Second Hospital, Lanzhou 730030, China.

Article Synopsis
  • Mesenchymal stem cells (MSCs) show a specific tendency to move towards tumors, impacting cancer growth, treatment resistance, and immune response, prompting research into MSC-related biomarkers for better predicting bladder cancer outcomes.
  • This study used data from TCGA and GSE31684 to identify genes linked to MSCs and created a risk assessment model through advanced statistical analysis techniques.
  • The final prognostic model highlighted five key genes and classified bladder cancer patients into risk categories, revealing that high MSC-risk patients faced worse outcomes and lower responsiveness to immunotherapy and specific chemotherapy drugs compared to low MSC-risk patients.
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Peptic ulcer disease remains a prevalent gastrointestinal disorder worldwide. Current treatments often have limitations, sparking interest in alternative therapies from medicinal plants. This review examines the gastroprotective potential of 54 North African medicinal plants against peptic ulcers.

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Article Synopsis
  • * Out of 224 patients, 63 underwent ALND due to persistent positive lymph nodes, revealing that the number of positive sentinel lymph nodes is a key predictor of additional nodal involvement.
  • * The results suggest that for patients with fewer than 2 positive sentinel lymph nodes after treatment, less invasive surgery (SLNB alone) may be a safe option, helping to inform surgical decisions for better locoregional control.
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A complication of type 1 diabetes mellitus (T1DM) is diabetic myopathy that includes reduced regenerative capacity of skeletal muscle. Sphingolipids are a diverse family of lipids with roles in skeletal muscle regeneration. Some studies have found changes in sphingolipid species levels in T1DM, however, the effect of T1DM on a sphingolipid panel in regenerating skeletal muscle has not been examined.

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Article Synopsis
  • - The study aimed to assess how pathologists report tumor content in prostate cancer biopsies and evaluate consistency among them using 10 standardized cases.
  • - A survey of 304 pathologists revealed that most report tumor extent as a percentage, but there is significant variability in how they calculate these percentages.
  • - The findings indicate high interobserver variability, especially with percentage reporting, suggesting that using absolute measures of tumor content could provide more consistent results for patient prognosis.
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Background: Collagen type X (ColXα1, encoded by ) is expressed specifically in the cartilage-to-bone transition, in bone marrow cells, and in osteoarthritic (OA) cartilage. We have previously shown that ColXα1 is expressed in breast tumor stroma, correlates with tumor-infiltrating lymphocytes, and predicts poor adjuvant therapy outcomes in ER/HER2 breast cancer. However, the underlying molecular mechanisms for these effects are unknown.

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Genomic Reporting Practices Across 5 Molecular Disciplines: A Study From the College of American Pathologists.

Arch Pathol Lab Med

November 2024

the Department of Pathology and Laboratory Medicine, Alpert Medical School at Brown University, Women & Infants Hospital of Rhode Island, Providence (Palomaki).

Article Synopsis
  • Genomic reports in molecular diagnostics are often narrative and inconsistent in content and format, despite existing regulatory guidelines.
  • A study evaluated 69 reports from 31 laboratories across five disciplines, finding that most met compliance but exhibited variability in how required elements were presented.
  • The findings highlight a need for improved consistency in report formatting to enhance communication of genetic test results to healthcare providers and patients.
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  • This study explores blood biomarkers that can predict responses to immune checkpoint inhibitors (ICIs) for patients with recurrent/metastatic head and neck squamous cell carcinoma, addressing challenges like tumor sample variability.
  • Researchers enrolled 100 patients and analyzed blood immune profiles, focusing on factors like tumor mutational burden (TMB) and PD-L1 scores, with a goal to find associations with treatment outcomes.
  • Key findings revealed that high levels of neutrophils and monocytes were linked to worse survival, while higher CD4T cells correlated with better outcomes, highlighting the potential of using blood tests for predicting ICI treatment responses.
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The effects of BRCA1 and 2 mutations on ovarian reserve and aging.

Fertil Steril

November 2024

Department of Obstetrics and Gynecology, Warren Alpert Medical School of Brown University, Providence, Rhode Island; Department of Obstetrics and Gynecology, Program in Women's Oncology, Women and Infants Hospital of Rhode Island, Providence, Rhode Island. Electronic address:

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A deep learning model for prediction of autism status using whole-exome sequencing data.

PLoS Comput Biol

November 2024

Center for Translational Neuroscience, Robert J. and Nancy D. Carney Institute for Brain Science and Brown Institute for Translational Science, Brown University, Providence, Rhode Island, United States of America.

Autism is a developmental disability. Research demonstrated that children with autism benefit from early diagnosis and early intervention. Genetic factors are considered major contributors to the development of autism.

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Inter-alpha inhibitor proteins (IAIPs) are neuroprotective and attenuate lipopolysaccharide (LPS)-mediated blood-brain barrier (BBB) disruption in neonatal rodents. We investigated some mechanism(s) fundamental to neuroprotection by IAIPs including changes in cerebral endothelial components and inflammation. Postnatal day-7 rats exposed to sham surgery and placebo or carotid ligation plus 8% FiO (90 min) were given IAIPs (30 or 60 mg/kg) or placebo and were killed 6, 12, 24, or 36 h after hypoxia-ischemia (HI).

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Article Synopsis
  • Metabolic dysfunction-associated steatohepatitis (MASH) is a serious liver condition with limited treatment options and relies on manual biopsies for assessment, which often shows high variability among readers.
  • A new artificial intelligence (AI) system, AIM-MASH, has been developed and validated across multiple sites to assist pathologists in scoring liver biopsies related to MASH, showing high reliability and consistency compared to traditional methods.
  • AIM-MASH significantly improved the accuracy of assessing key factors like inflammation and MASH resolution when used by expert pathologists, suggesting it can reduce variability and enhance the evaluation of new treatments in MASH clinical trials.
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