392,585 results match your criteria: "Center for Astrophysics | Harvard & Smithsonian[Affiliation]"

We employed high-resolution fMRI to distinguish the impacts of anisometropia and strabismus amblyopia on the evoked ocular dominance (OD) response. Sixteen amblyopic participants (8 females) plus 8 individuals with normal vision (1 female), participated in this study for whom, we measured the difference between the response to stimulation of the two eyes, across areas V1-V4.In controls, the evoked OD response formed the expected striped pattern within V1.

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Background And Purpose: Granulomatosis with polyangiitis (GPA) and eosinophilic granulomatosis with polyangiitis (EGPA) are the most common causes of chronic sinusitis from systemic granulomatous diseases. While both are small- to medium-sized vasculitis with necrotizing granulomas, they have different clinical courses and prognoses. High-density sinus opacification has been reported in allergic fungal sinusitis with eosinophilic infiltrates.

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Stress and Cognition: From Bench to Bedside?

Biol Psychiatry

February 2025

Department of Psychiatry, McLean Hospital, Harvard Medical School, Belmont, Massachusetts; Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, Massachusetts.

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Background: Prognostic models help aid medical decision-making. Various prognostic models are available via websites such as MDCalc, but these models typically predict one outcome, for example, stroke risk. Each model requires individual predictors, for example, age, lab results and comorbidities.

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T follicular helper cell expansion and hyperimmunoglobulinemia with spontaneous IgE production to dietary antigens in IgA-deficient mice.

Mucosal Immunol

January 2025

Division of Immunology, Department of Pediatrics, Boston Children's Hospital, Boston, MA, United States; Department of Pediatrics, Harvard Medical School, Boston, MA, United States. Electronic address:

Immunoglobulin A (IgA), the most abundantly produced antibody at mucosal surfaces, is thought to play key roles in immune responses to respiratory and enteric pathogens and in the regulation of commensal colonization. Low IgA levels have been associated with recurrent infections and immune dysregulation, including inflammatory bowel disease and autoimmunity. Levels of IgA in maternal breast milk and infant stool are both inversely associated with the emergence of immune responses to food antigens in infants and, in naturally resolving food sensitivity and immunotherapy protocols, the induction of IgA antibodies to dietary antigens has been associated with the acquisition of food tolerance.

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Challenges Faced by Patients Undergoing Fecal Ostomy Surgery: A Qualitative Study of Colorectal Cancer Patient Perspectives.

J Gastrointest Surg

January 2025

Ariadne Labs, Brigham and Women's Hospital, Harvard. T.H. School of Public Health, Boston, MA, 02115; Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02114; Mongan Institute Center for Aging and Serious Illness, Massachusetts General Hospital, Boston, MA, 02114. Electronic address:

Background: Ostomy education and support is instrumental in surgical recovery and adaptation. We aimed to evaluate 1) challenges faced by fecal ostomy patients with colorectal cancer and 2) resources necessary for recovery.

Methods: We recruited patients 21-90 days after scheduled fecal ostomy surgery for locally advanced or metastatic colorectal cancer from a single, tertiary academic center.

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Pediatric intensive care patients are particularly susceptible to severe bacterial infections because of ineffective neutrophil responses. The reasons why neutrophils of newborns are less responsive than those of adults are not clear. Because adenosine triphosphate (ATP) and adenosine (ADO) tightly regulate neutrophils, we studied whether the ATP and ADO levels in the blood of newborn mice could impair the function of their neutrophils.

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Understanding the Concept of Patient Safety Culture: Constitutive and Operational Definitions for Health Care Organizations.

J Nurs Care Qual

January 2025

Author Affiliations: School of Nursing (Dr Fontenele Lima de Carvalho), Ceara State University, Fortaleza, Ceará, Brazil; Division of General Internal Medicine (Drs Fontenele Lima de Carvalho and Bates), Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.; and Department of Health Policy and Management (Dr Bates), Harvard T.H. Chan School of Public Health, Boston, Massachusetts.

Background: Patient safety culture is crucial for improving health care quality, however, there is no consensus on its definition.

Purpose: This study aimed to clarify and update the concept of patient safety culture.

Methods: We employed Norris' 6-step concept clarification method.

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Definition and diagnostic criteria of clinical obesity.

Lancet Diabetes Endocrinol

January 2025

Division of Diabetes & Nutritional Sciences, School of Cardiovascular and Metabolic Medicine & Sciences, King's College London, London, UK; Catholic University of the Sacred Heart, Rome, Italy; University Polyclinic Foundation Agostino Gemelli IRCCS, Rome, Italy.

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Outcomes after medical treatment for primary aldosteronism: an international consensus and analysis of treatment response in an international cohort.

Lancet Diabetes Endocrinol

January 2025

Centre for Endocrinology and Metabolism, Hudson Institute of Medical Research, Clayton, VIC, Australia; Department of Endocrinology, Monash Health, Clayton, VIC, Australia.

Background: Primary aldosteronism can be treated medically but there is no standardised method to evaluate treatment outcomes. We aimed to develop criteria for assessing the outcomes of targeted medical treatment of primary aldosteronism, analyse outcomes across an international cohort, and identify factors associated with a complete treatment response.

Methods: An international panel of 31 primary aldosteronism experts used the Delphi method to reach consensus on the definition of complete, partial, or absent biochemical and clinical outcomes of medical treatment of primary aldosteronism.

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Adjuvant aspirin therapy and colorectal cancer survival.

Lancet Gastroenterol Hepatol

January 2025

Departments of Epidemiology and Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA; Clinical and Translational Epidemiology Unit and Division of Gastroenterology, Massachusetts General Hospital, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA. Electronic address:

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A biophysical basis for the spreading behavior and limited diffusion of Xist.

Cell

January 2025

Department of Molecular Biology, Massachusetts General Hospital, Boston, MA 02114, USA; Department of Genetics, Harvard Medical School, Boston, MA, USA. Electronic address:

Xist RNA initiates X inactivation as it spreads in cis across the chromosome. Here, we reveal a biophysical basis for its cis-limited diffusion. Xist RNA and HNRNPK together drive a liquid-liquid phase separation (LLPS) that encapsulates the chromosome.

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Long somatic DNA-repeat expansion drives neurodegeneration in Huntington's disease.

Cell

January 2025

Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Department of Genetics, Harvard Medical School, Boston, MA 02115, USA; Program in Neuroscience, Harvard Medical School, Boston, MA 02215, USA; Howard Hughes Medical Institute, Boston, MA 02215, USA. Electronic address:

In Huntington's disease (HD), striatal projection neurons (SPNs) degenerate during midlife; the core biological question involves how the disease-causing DNA repeat (CAG) in the huntingtin (HTT) gene leads to neurodegeneration after decades of biological latency. We developed a single-cell method for measuring this repeat's length alongside genome-wide RNA expression. We found that the HTT CAG repeat expands somatically from 40-45 to 100-500+ CAGs in SPNs.

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The relation between obsessive-compulsive disorder (OCD) and circadian rhythm disturbance has been increasingly acknowledged in recent years. While prior clinical studies have utilized patients' self-reported sleep behaviors, there is a need to also explore the measurable, biological aspects of circadian rhythms. The current study has two aims: first, to describe the biological circadian rhythms of individuals with OCD seeking intensive residential treatment, including their relationship with self-reported measures of sleep and OCD symptoms; and second, to examine longitudinal associations between biological circadian rhythms and OCD symptom severity during the course of residential treatment.

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Characterization of a novel PET radioligand for mitochondrial complex I in nonhuman primate.

Nucl Med Biol

January 2025

Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, United States. Electronic address:

The role of mitochondrial complex I (MC-I) dysfunction is well-documented across a range of neurodegenerative disorders. Recently, a novel positron emission tomography (PET) radioligand, [F]CNL02, has been synthesized to target MC-I. In this paper, we provide a comprehensive characterization of [F]CNL02, using nonhuman primate as a model system.

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Objective: Presenting at academic conferences is an important means of disseminating research, networking, and building a professional reputation, but the quality of presentations at conferences is often suboptimal. This project describes the design, implementation, and evaluation of a presentation coaching program offered by an academic surgical society to presenters at its annual meeting.

Design: Oral presenters were paired with a coach and encouraged to meet independently, yet coaching was unstructured.

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Purpose: Clonal hematopoiesis (CH) has been associated with a variety of adverse outcomes, most notably hematologic malignancy and ischemic cardiovascular disease. A series of recent studies also suggest that CH may play a role in the outcomes of patients with solid tumors, including breast cancer. Here, we review the clinical and biological data that underlie potential connections between CH, inflammation, and breast cancer, with a focus on the prevalence and impact of clonal hematopoiesis of indeterminate potential in patients with breast cancer.

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The early stages of HIV-1 infection include the trafficking of the viral core into the nucleus of infected cells. However, much remains to be understood about how HIV-1 accomplishes nuclear import and the consequences of the import pathways utilized on nuclear events. The host factor cleavage and polyadenylation specificity factor 6 (CPSF6) assists HIV-1 nuclear localization and post-entry integration targeting.

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The Psychiatric Consultation Service at Massachusetts General Hospital sees medical and surgical inpatients with comorbid psychiatric symptoms and conditions. During their twice-weekly rounds, Dr Stern and other members of the Consultation Service discuss diagnosis and management of hospitalized patients with complex medical or surgical problems who also demonstrate psychiatric symptoms or conditions. These discussions have given rise to rounds reports that will prove useful for clinicians practicing at the interface of medicine and psychiatry.

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Opioid dependence is defined by an aversive withdrawal syndrome upon drug cessation that can motivate continued drug-taking, development of opioid use disorder, and precipitate relapse. An understudied but common opioid withdrawal symptom is disrupted sleep, reported as both insomnia and daytime sleepiness. Despite the prevalence and severity of sleep disturbances during opioid withdrawal, there is a gap in our understanding of their interactions.

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Nanocarriers have shown significant promise in the diagnosis and treatment of various diseases, utilizing a wide range of biocompatible materials such as metals, inorganic substances, and organic components. Despite diverse design strategies, key physicochemical properties, including hydrodynamic diameter, shape, surface charge, and hydrophilicity/lipophilicity, are crucial for optimizing biodistribution, pharmacokinetics, and therapeutic efficacy. However, these properties are often influenced by drug payload, presenting an ongoing challenge in developing versatile platform technologies for theranostics.

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