290,949 results match your criteria: "Harvard Medical School; megason@hms.harvard.edu.[Affiliation]"

Xenon gas is considered to be a safe anesthetic and imaging agent. Research on its other potentially beneficial effects suggests that xenon may have broad efficacy for treating health disorders. A number of reviews on xenon applications have been published, but none have focused on substance use disorders.

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In patients with severe olfactory and gustatory dysfunction, olfactory cleft opacification improves with expanded intranasal steroid treatment (EDS-FLU) relative to placebo. This is directly associated with objective and patient-reported taste/smell improvement.

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Introduction: This study aimed to identify cognitive tests that optimally relate to tau positron emission tomography (PET) signal in the inferior temporal cortex (ITC), a neocortical region associated with early tau accumulation in Alzheimer's disease (AD).

Methods: We analyzed cross-sectional data from the harvard aging brain study (HABS) (= 128) and the Anti-Amyloid Treatment in Asymptomatic Alzheimer's (A4) study (= 393). We used elastic net regression to identify the most robust cognitive correlates of tau PET signal in the ITC.

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Introduction: Timely detection and tracking of Alzheimer's disease (AD) -related cognitive decline has become a public health priority. We investigated whether the NIH Toolbox for Assessment of Neurological and Behavioral Function-Cognition Battery (NIHTB-CB) detects AD-related cognitive decline.

Methods:  = 171 participants (age 76.

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Background: Brain-derived neurotrophic factor (BDNF) may help middle-aged and older adults resist age-related neurodegenerative conditions and psychiatric disorders. Recent studies suggested that Traditional Chinese exercises (TCEs) may be a promising strategy to improve the BDNF levels of these populations, while the effectiveness has yet to be definitively confirmed due to the variances in the study designs and observations. Therefore, this systematic review and meta-analysis aimed to examine the effects of TCEs intervention on BDNF in middle-aged and older adults.

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Glial-vascular interactions are critical for the formation and maintenance of brain blood vessels and the blood-brain barrier (BBB) in mammals, but their role in the zebrafish BBB remains unclear. Using three glial gene promoters-, , and (a truncated )-we explored glial-vascular development in zebrafish. Sparse labeling showed fewer glial-vascular interactions at early stages, with glial coverage and contact area increasing with age.

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Development of a latency model for HIV-1 subtype C and the impact of long terminal repeat element genetic variation on latency reversal.

J Virus Erad

December 2024

HIV Pathogenesis Programme, The Doris Duke Medical Research Institute, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban, South Africa.

Sub-Saharan Africa accounts for almost 70 % of people living with HIV (PLWH) worldwide, with the greatest numbers centred in South Africa where 98 % of infections are caused by subtype C (HIV-1C). However, HIV-1 subtype B (HIV-1B), prevalent in Europe and North America, has been the focus of most cure research and testing despite making up only 12 % of HIV-1 infections globally. Development of latency models for non-subtype B viruses is a necessary step to address this disproportionate focus.

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The lack of thematic continuity in dreams with scene and plot discontinuities.

Sleep Adv

December 2024

EPISTEME Research and Strategy, Brooklyn, NY, USA.

A central tenet of Freudian dream theory holds that there is thematic coherence within all dreams, even those containing scene and plot discontinuities. While other models support varying degrees of dream coherence, none address the question of how, or even whether, coherence can be identified in dreams with such discontinuities. Here, we objectively test the ability of judges to evaluate the coherence of individual dream narratives.

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Study Objectives: Sleep spindles, defining electroencephalographic oscillations of nonrapid eye movement (NREM) stage 2 sleep (N2), mediate sleep-dependent memory consolidation (SDMC). Spindles are also thought to protect sleep continuity by suppressing thalamocortical sensory relay. Schizophrenia is characterized by spindle deficits and a correlated reduction of SDMC.

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This review comprehensively evaluates China's progress in care of end-stage kidney disease (ESKD) by identifying achievements and gaps, reviewing ESKD-related policy initiatives, and proposing policy recommendations. In the past decade, China has made laudable progress in access to ESKD care with narrowed difference between the number of patients needing and receiving kidney replacement therapies (KRT). China has also experienced significant improvements in clinical quality and outcomes of ESKD care.

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Objective: This study examined the psychometric properties of a newly developed scale for measuring subjective cognitive reserve (SCR) across multiple domains, including nutrition, physical condition, sleep, cognition, willingness to learn, socialization, general health, and life plan.

Method: The relationship between SCR scores and other established measures of cognitive reserve and subjective cognitive decline was also explored. A sample of 402 healthy participants aged 18 to 79 years took part in the study.

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Disparate Use of Diagnostic Modalities for Patients With Limited English Proficiency and Neurologic Disorders.

Neurol Clin Pract

April 2025

Department of Neurology (AS), Massachusetts General Hospital, Harvard Medical School, Boston; Department of Public Health Sciences (RBAB), University of North Carolina at Charlotte; Disparities Research Unit, Department of Medicine, Massachusetts General Hospital; Department of Psychiatry, Harvard Medical School; Harvard Medical School (DH, SW), Boston; and City University of New York at Hunter College (DH, SW).

Background And Objectives: Limited English proficiency (LEP) impairs health access-including outpatient specialty care-and quality care, i.e., inappropriate use of diagnostic tests.

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A Real-World Prospective Multiple Sclerosis Pregnancy Registry in the United States: PREG-MS.

Neurol Clin Pract

April 2025

Brigham MS Center (MKH), Harvard Medical School, Boston, MA; Georgia State University (MCM), Atlanta; Brigham and Women's Hospital (TDM, JP-P, CS, JZ), Boston, MA; Massachusetts General Hospital (ECK), Harvard Medical School, Boston, MA; University of Vermont (AJS), Burlington; Elliot Lewis MS Center (EL, JK), Wellesley, MA; University of Massachusetts (CI, IB), Worcester, MA; Novartis Pharmaceuticals (JMS), Jersey City, NJ; Concord Hospital (AC), NH; and University of British Columbia (ADS), Vancouver, BC, Canada.

Background And Objectives: Multiple sclerosis (MS) affects more than 1 million people in the United States, including reproductive-age women. There has been a paucity of prospective, pregnancy registries based on MS disease rather than medication exposures. A prospective MS pregnancy registry (PREG-MS) was established in 2017 as a prospective, single-cohort, real-world MS pregnancy registry in New England States of the United States, with goals to evaluate (1) course of MS and disease-modifying therapies (DMT) use during conception attempts and in the peripartum period, (2) pregnancy outcomes in women with MS (WwMS), and (3) longer-term developmental outcomes in offspring of WwMS.

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Reinnervation of Free Nipple Grafts Associated With Improved Erection Function.

Plast Reconstr Surg Glob Open

January 2025

From the Division of Plastic and Reconstructive Surgery, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA.

Background: Most patients undergoing breast surgery with free nipple grafts lose nipple erection (NE) function. This study aimed to evaluate the effect of nerve preservation and reconstruction with targeted nipple-areola complex reinnervation (TNR) on NE following gender-affirming mastectomy with free nipple grafting.

Methods: Patients undergoing gender-affirming mastectomy with free nipple grafts were prospectively enrolled.

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Long-term Breast Shape Analysis After Short-scar Reduction Mammaplasty: A Critical View.

Plast Reconstr Surg Glob Open

January 2025

From the Department of Plastic and Reconstructive Surgery, Rabin Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.

Background: Over the past 2 decades, vertical scar reduction mammaplasty techniques have been gaining more acceptance. However, many surgeons are still hesitant to use it routinely because of the uncertainty of the effectiveness of vertical scar techniques in managing lower pole skin excess. We aimed to test its efficacy by using objective anthropometric measurements to evaluate long-term breast shape and lower pole stability.

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High Aspect Ratio Polymer Nanocarriers for Gene Delivery and Expression in Plants.

Nano Lett

January 2025

Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.

Plant genetic engineering methods are critical for food security and biofuel production and to enable molecular farming. Here, we elucidated how polymeric high aspect ratio nanocarriers can enable DNA delivery to plants and transient expression. We demonstrated that a nanocarrier with 20 nm width, 80 nm length, and a polymer-to-DNA ratio of N/P = 3.

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C-low threshold mechanoreceptors (C-LTMRs) in animals (termed C-tactile (CT) fibres in humans) are a subgroup of C-fibre primary afferents, which innervate hairy skin and respond to low-threshold punctate indentations and brush stimuli. These afferents respond to gentle touch stimuli and are implicated in mediating pleasant/affective touch. These afferents have traditionally been studied using low-throughput, technically challenging approaches, including microneurography in humans and teased fibre electrophysiology in other mammals.

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The understanding of responses to traumatic events has been greatly influenced by the introduction of the diagnosis of post-traumatic stress disorder (PTSD). In this paper we review the initial versions of the diagnostic criteria for this condition and the associated epidemiological findings, including sociocultural differences. We consider evidence for post-traumatic reactions occurring in multiple contexts not previously defined as traumatic, and the implications that these observations have for the diagnosis.

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Background: Medications targeting the leptin and Apolipoprotein CIII (APOC3) pathways are currently under development for the treatment of hypertriglyceridaemia. Given that both pathways are implicated in triglyceride regulation, it is unknown whether they function independently or interact under physiological conditions and under acute or long-term energy deficiency.

Methods: APOC3 levels and their association with circulating lipids and lipoproteins were evaluated in the context of two randomised controlled studies.

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Temporal interference stimulation (TIS) is a new form of transcranial electrical stimulation (tES) that has been proposed as a method for targeted, noninvasive stimulation of deep brain structures. While TIS holds promise for a variety of clinical and nonclinical applications, little data is yet available regarding its effects in humans and its mechanisms of action. To inform the design and safe conduct of experiments involving TIS, researchers require quantitative guidance regarding safe exposure limits and other safety considerations.

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