25,355 results match your criteria: "MA 02215; and American Enterprise Institute (S.A.V.)[Affiliation]"

An implantable system for opioid safety.

Device

October 2024

Division of Gastroenterology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA 02139, USA.

Naloxone can effectively rescue victims from opioid overdose, but less than 5% survive due to delayed or absent first responder intervention. Current overdose reversal systems face key limitations, including low user adherence, false positive detection, and slow antidote delivery. Here, we describe a subcutaneously implanted robotic first responder to overcome these challenges.

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Out-of-focus signal rejection for pO measurements using two-photon phosphorescence lifetime microscopy.

Biomed Opt Express

January 2025

Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.

Two-photon phosphorescence lifetime microscopy has been a key tool for studying cerebral oxygenation in mice. However, the accuracy of the partial pressure of oxygen (pO) measurements is affected by out-of-focus signal. In this work, we applied reconfigurable differential aberration imaging to characterize and correct for out-of-focus signal contamination in intravascular pO imaging.

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The Fraction of Absorbed Photosynthetically Active Radiation (FPAR) is essential for assessing vegetation's photosynthetic efficiency and ecosystem energy balance. While the MODIS FPAR product provides valuable global data, its reliability is compromised by noise, particularly under poor observation conditions like cloud cover. To solve this problem, we developed the Spatio-Temporal Information Composition Algorithm (STICA), which enhances MODIS FPAR by integrating quality control, spatio-temporal correlations, and original FPAR values, resulting in the High-Quality FPAR (HiQ-FPAR) product.

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Objective: To evaluate the impact of ART duration and CD4 count on risk for high grade cervical dysplasia in women with HIV (WWH) compared to women without HIV in the treat-all era with integrase strand inhibitors (INSTIs).

Design: Prospective longitudinal cohort study in Botswana.

Methods: From February 2021 to August 2022, baseline HPV self-sampling was offered to women with and without HIV.

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The intertwined nature of cardiac and renal failure, where dysfunction in one organ predicts a poor outcome in the other, has long driven the interest in uncovering the exact molecular links between the two. Elucidating the mechanisms driving Cardiorenal Syndrome (CRS) will enable the development of targeted therapies that disrupt this detrimental cycle, potentially improving outcomes for patients. A recent study by Chatterjee .

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Purpose: To report outcomes in hepatocellular carcinoma (HCC) patients with lobar and segmental vascular invasion treated with resin Yttrium-90 transarterial radioembolization (Y90-TARE) with single-compartment MIRD (Medical Internal Radiation Dose) model.

Materials And Methods: This was a retrospective IRB approved study of patients with a diagnosis of HCC with vascular invasion undergoing resin Y90-TARE from 2014 to 2022 (n = 61). Patients with Body Surface Area dosimetry (n = 20), main portal vein invasion (n = 6) and patients with an ECOG of > 2 were excluded (n = 1) with a final cohort of 34 patients.

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Physiology education is at the core of biomedical science and medicine. Physiology unites multiple disciplines to explain the mechanisms whereby a risk factor is associated with disease. Race, ethnicity, sexual orientation, and gender identity are associated with risk of cardiovascular disease (CVD).

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Itaconate transporter SLC13A3 confers immunotherapy resistance via alkylation-mediated stabilization of PD-L1.

Cell Metab

January 2025

Department of Urology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China; Key Laboratory for Tumor Precision Medicine of Shaanxi Province, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi 710061, P.R. China. Electronic address:

Itaconate is a metabolite catalyzed by cis-aconitate decarboxylase (ACOD1), which is mainly produced by activated macrophages and secreted into the extracellular environment to exert complex bioactivity. In the tumor microenvironment, itaconate is concentrated and induces an immunosuppressive response. However, whether itaconate can be taken up by tumor cells and its mechanism of action remain largely unclear.

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A divergent two-domain structure of the anti-Müllerian hormone prodomain.

Proc Natl Acad Sci U S A

January 2025

Department of Molecular & Cellular Biosciences, University of Cincinnati, Cincinnati, OH 45267.

TGFβ family ligands are synthesized as precursors consisting of an N-terminal prodomain and C-terminal growth factor (GF) signaling domain. After proteolytic processing, the prodomain typically remains noncovalently associated with the GF, sometimes forming a high-affinity latent procomplex that requires activation. For the TGFβ family ligand anti-Müllerian hormone (AMH), the prodomain maintains a high-affinity interaction with its GF that does not render it latent.

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Background: Recurrent symptom-relevant negative autobiographical memories are common in patients with emotional disorders such as anxiety and depression, even among those without a trauma-related diagnosis. Recurrent negative autobiographical memories may also contribute to distress in non-clinical populations.

Methods: To examine the prevalence of recurrent negative autobiographical memories and associated psychological features, we recruited a student sample ( = 101) and a treatment-seeking sample of patients with emotional disorders ( = 123).

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Pulmonary hypertension (PH) increases the mortality of preterm infants with bronchopulmonary dysplasia (BPD). There are no curative therapies for this disease. Lung endothelial carnitine palmitoyltransferase 1a (Cpt1a), the rate-limiting enzyme of the carnitine shuttle system, is reduced in a rodent model of BPD.

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Background: Compared to older adults with breast cancer (BC), adolescents and young adults (AYAs) develop more aggressive disease necessitating more intensive therapy with curative intent, which is disruptive to planned life trajectories. The burden of unmet needs among AYA BC survivors exists in two domains: (1) symptoms (e.g.

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iPSC-derived CD19 CAR NK cells for relapsed or refractory lymphoma.

Lancet

January 2025

Division of Transplantation and Cellular Therapies, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA. Electronic address:

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Calcium calmodulin kinase IV deficiency in podocytes prevents the development of lupus nephritis.

Clin Immunol

January 2025

Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, United States of America.

Systemic lupus erythematosus (SLE) is a chronic autoimmune disease characterized by widespread organ involvement including the kidney. Calcium/calmodulin-dependent protein kinase IV (CaMK4) has been shown to conrol immune cell nad podocyte function. To address the effect of genetic podocyte-specific CaMK4 deficiency on systemic autoimmunity and kidney pathology in lupus-prone mice we generated B6.

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A hallmark of chronic and inflammatory diseases is the formation of a fibrotic and stiff extracellular matrix (ECM), typically associated with abnormal, leaky microvascular capillaries. Mechanisms explaining how the microvasculature responds to ECM alterations remain unknown. Here, we used a microphysiological model of capillaries on a chip mimicking the characteristics of healthy or fibrotic collagen to test the hypothesis that perivascular cells mediate the response of vascular capillaries to mechanical and structural changes in the human ECM.

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Cpeb1 remodels cell type-specific translational program to promote fear extinction.

Sci Adv

January 2025

Department of Medical Genetics, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.

Protein translation is crucial for fear extinction, a process vital for adaptive behavior and mental health, yet the underlying cell-specific mechanisms remain elusive. Using a Tet-On 3G genetic approach, we achieved precise temporal control over protein translation in the infralimbic medial prefrontal cortex () during fear extinction. In addition, our results reveal that the disruption of cytoplasmic polyadenylation element binding protein 1 (Cpeb1) leads to notable alterations in cell type-specific translational programs, thereby affecting fear extinction.

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Transcriptional determinants of goal-directed learning and representational drift in the parahippocampal cortex.

Cell Rep

January 2025

Department of Biology, Boston University, Boston, MA 02215, USA; Center for Neurophotonics, Boston University, Boston, MA 02215, USA; Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA; Center for Systems Neuroscience, Boston University, Boston MA 02215, USA. Electronic address:

Article Synopsis
  • Task learning involves forming and storing associations between stimuli and outcomes in memory, but individual neuron representations can change over time.
  • Researchers used two-photon calcium imaging and spatial transcriptomics to study neuron activity and gene expression in the perirhinal cortex during task training.
  • Deleting brain-derived neurotrophic factor disrupted gene expression and task learning, while prolonged training reduced representational drift and strengthened existing memory representations, highlighting key cellular mechanisms in memory stability.
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Social isolation and health-related consequences of the COVID-19 pandemic may have significantly impacted quality of life in people with Parkinson's disease (PwPD). The effect of the COVID-19 pandemic specifically on subjective cognition and social functioning in PwPD is poorly understood. We conducted a longitudinal analysis of changes in subjective cognitive and social functioning in PwPD before (T1, 2017-2019) and during (T2, 2021) the COVID-19 pandemic.

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Aneurysm dome and vessel pressure measurements with coiling, stent assisted coiling and flow diversion.

Acta Neurochir (Wien)

January 2025

Division of Neurosurgery, Beth Israel Deaconess Medical Center, Harvard Medical School, 110 Francis Street , Boston, MA, 02215, USA.

Background: Variability in long-term endovascular treatment outcomes for intracranial aneurysms has prompted questions regarding the effects of these treatments on aneurysm hemodynamics. Endovascular techniques disrupt aneurysmal blood flow and shear, but their influence on intra-aneurysmal pressure remains unclear. A better understanding of aneurysm pressure effects may aid in predicting outcomes and guiding treatment decisions.

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Purpose: Contrast-enhanced CT (CECT) may be performed immediately following microwave liver ablation for assessment of ablative margins. However, practices and protocols vary among institutions. Here, we compare a standardized bolus-tracked biphasic CECT protocol and compare this with a single venous phase fixed delay protocol for ablation zone (AZ) assessment.

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Virtual Neonatal Resuscitation Curriculum for Emergency Medical Services (EMS) to Improve Out-of-Hospital Newborn Care.

Prehosp Emerg Care

January 2025

Department of Emergency Medicine, Oregon Health & Science University, Oregon Health and Science University, 3181 SW Sam Jackson Park Rd Portland, OR 97239.

Objectives: Out-of-hospital births are associated with a 2-to 11-fold increased risk of death compared to in-hospital births and are growing. Emergency Medical Services (EMS) clinicians have limited exposure to hospital birth emergencies, and there is no standardized prehospital neonatal resuscitation curriculum. Neonatal Resuscitation Program (NRP) guidelines are the standard of care for infants born in the United States but focuses on in-hospital births and is not easily applied to EMS.

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Impact of Artificial Intelligence (AI) Image Enhancing Filters on Patient Expectations for Plastic Surgery Outcomes.

Aesthetic Plast Surg

January 2025

Division of Plastic Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, 110 Francis Street Suite 5A, Boston, MA, 02215, USA.

Background: Artificial intelligence (AI) technologies use a three-part strategy for facial visual enhancement: (1) Facial Detection, (2) Facial Landmark Detection, and (3) Filter Application (Chen in Arch Fac Plast Surg 21:361-367, 2019). In the context of the surgical patient population, open-source AI algorithms are capable of modifying or simulating images to present potential results of plastic surgery procedures. Our primary aim was to understand whether AI filter use may influence individuals' perceptions and expectations of post-surgical outcomes.

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Introduction: Healthcare payers in the USA increasingly cover genetic testing, including exome sequencing (ES), for pediatric indications. Analysis of claims data enables understanding of utilization and costs in real-world settings. The objective of this study was to describe genetic test utilization, diagnostic outcomes, and costs for children who received ES as well as for those who received less comprehensive forms of genetic testing, along with their families.

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Intracranial hemorrhages are highly concerning but underreported complications related to flow diversion (FD) treatment of intracranial aneurysms. Herein, we aimed to characterize these complications and the factors influencing their occurrence. We retrospectively reviewed patients treated with FD from 2013 to 2023 at a single U.

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We present the case of a 51-year-old man with Von Hippel-Lindau disease and a history of renal transplantation who developed a persistent, painful tongue lesion with episodes of significant swelling. Given his history of prolonged immunosuppression and elevated cancer risk, oral squamous cell carcinoma was a major concern. However, histopathological evaluation confirmed recrudescent herpes simplex virus (HSV) infection rather than malignancy.

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