Publications by authors named "O'Donnell K"

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  • The study explored how psilocybin-assisted therapy (PAT) impacts personality traits in people with alcohol use disorder (AUD), hypothesizing it would reduce trait impulsiveness and improve drinking behavior.
  • Eighty-four AUD patients were divided into two groups (psilocybin vs. placebo) and assessed for changes in personality traits over time, finding significant personality shifts in the psilocybin group, including reduced neuroticism and increased openness.
  • The results indicated that lower impulsiveness correlated with decreased alcohol consumption, particularly among those who drank at risk before treatment, pointing to potential benefits of PAT in addressing both personality and drinking behaviors.
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  • 45.9% of reported HIV cases were in migrants, with the majority (86.7%) coming from non-EU/EEA countries.
  • A concerning 52.4% of migrants received a late HIV diagnosis, especially non-EU/EEA migrants through heterosexual transmission, highlighting the need for better prevention and testing strategies.
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The first isolate of the emerging filovirus Lloviu virus (LLOV) was obtained in 2022. No animal disease models have been established. We assessed the pathogenic potential of LLOV in ferrets after intranasal, intramuscular, or aerosol exposure.

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  • * The provided protocol details how to isolate and store peripheral blood mononuclear cells, along with techniques for thawing, stimulating cells, and conducting flow cytometry for analysis.
  • * Researchers can adapt this protocol to better fit their specific interests and the capabilities of their flow cytometer, allowing for in-depth characterization of immune cell responses.
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Results from multiple recent studies support further evaluation of 3,4-methylenedioxymethamphetamine (MDMA) in conjunction with psychotherapy (i.e., MDMA-Assisted Therapy) in the treatment of post-traumatic stress disorder (PTSD).

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Unlabelled: The integrated stress response (ISR) is an adaptive pathway hijacked by cancer cells to survive cellular stresses in the tumor microenvironment. ISR activation potently induces Programmed Death Ligand 1 (PD-L1), leading to suppression of anti-tumor immunity. Here we sought to uncover additional immune checkpoint proteins regulated by the ISR to elucidate mechanisms of tumor immune escape.

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Background: Plasma-derived Extracellular Vesicles (EVs) have been suggested as novel biomarkers in melanoma, due to their ability to reflect the cell of origin and ease of collection. This study aimed to identify novel EV biomarkers that can discriminate between disease stages. This was achieved by characterising the plasma-derived EVs of patients with melanoma, and comparing their proteomic and metabolomic profile to those from healthy controls.

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Background: Universal screening for depression and anxiety in pregnancy has been recommended by several leading medical organizations, but the implementation of such screening protocols may overburden health care systems lacking relevant resources. Text message screening may provide a low-cost, accessible alternative to in-person screening assessments. However, it is critical to understand who is likely to participate in text message-based screening protocols before such approaches can be implemented at the population level.

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Office-based testing, enhanced by advances in imaging technology, is routinely used in eye care to non-invasively assess ocular structure and function. This type of imaging coupled with autonomous artificial intelligence holds immense opportunity to diagnose eye diseases quickly. Despite the wide availability and use of ocular imaging, there are several factors that hinder optimization of clinical practice and patient care.

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Existing antibodies (Abs) have varied effects on humoral immunity during subsequent infections. Here, we leveraged in vivo systems that allow precise control of antigen-specific Abs and B cells to examine the impact of Ab dose, affinity, and specificity in directing B cell activation and differentiation. Abs competing with the B cell receptor (BCR) epitope showed affinity-dependent suppression.

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Background: This protocol describes a realist review exploring the problem of "missingness" in healthcare, defined as the repeated tendency not to take up offers of care that has a negative impact on the person and their life chances. More specifically, the review looks at the phenomenon of patients missing multiple appointments in primary care in the UK - at the causal factors that influence how patients come to be "missing" in this way, and what interventions might support uptake and "presence" in healthcare. Background research informing this project suggests that a high rate of missed appointments predicted high premature death rates, and patients were more likely to have multiple long-term health conditions and experience significant socioeconomic disadvantage.

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  • * The study focuses on a trial called Sauti ya Vijana (Voice of Youth), which aims to improve viral suppression and mental health for YPLWH in Tanzania through a group and individual intervention led by peer group leaders with HIV experience.
  • * Participants aged 10-24, who have been on antiretroviral therapy and are aware of their HIV status, will be evaluated at multiple points over 18 months to measure the program's effectiveness, implementation acceptability, and overall impact on their health and well-being.
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Background: The persistence of symptoms for ≥12 weeks after a COVID-19 infection is known as Long COVID (LC), a condition with unclear pathophysiology and no proven treatments to date. Living with obesity is a risk factor for LC and has symptoms which may overlap with and aggravate LC.

Methods: ReDIRECT is a remotely delivered trial assessing whether weight management can reduce LC symptoms.

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Marburg virus (MARV), a filovirus, was first identified in 1967 in Marburg, Germany, and Belgrade, former Yugoslavia. Since then, MARV has caused sporadic outbreaks of human disease with high case fatality rates in parts of Africa, with the largest outbreak occurring in 2004/05 in Angola. From 2021 to 2023, MARV outbreaks occurred in Guinea, Ghana, New Guinea, and Tanzania, emphasizing the expansion of its endemic area into new geographical regions.

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  • * The study analyzed data from the Avon Longitudinal Study of Parents and Children, focusing on 1,018 mother-child pairs to explore maternal ACEs and their impact on epigenetic aging during pregnancy and at birth.
  • * Findings indicated a significant association between maternal ACEs and changes in epigenetic age in both mothers and their newborns, highlighting the biological imprint of early life experiences.
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  • This systematic review focuses on sibling relationships in Latinx families, addressing a previously overlooked area in existing research.
  • It synthesizes findings from 12 articles to highlight how cultural factors like familism and simpatía positively affect sibling intimacy, while gender roles play a moderating role.
  • The study emphasizes the necessity for culturally sensitive research methods and suggests that further exploration is needed within different Latinx subgroups to fully understand these dynamics.
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  • The study investigates how genetic factors and stressors contribute to major depressive disorder (MDD) by analyzing gene expression and stress patterns in a cohort of 1083 individuals from Southwest Montreal, Canada.
  • Using advanced statistical methods, researchers identified 3321 genes linked to MDD and discovered that different stress patterns can enhance genetic susceptibility to the disorder, particularly in specific brain tissues.
  • The limitations of the study include its focus on a predominantly Caucasian sample, which may limit the applicability of the findings to diverse ethnic populations.
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Epigenetic processes, such as DNA methylation, show potential as biological markers and mechanisms underlying gene-environment interplay in the prediction of mental health and other brain-based phenotypes. However, little is known about how peripheral epigenetic patterns relate to individual differences in the brain itself. An increasingly popular approach to address this is by combining epigenetic and neuroimaging data; yet, research in this area is almost entirely comprised of cross-sectional studies in adults.

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Background: In the Republic of Ireland, the COVID-19 crisis led to sexual health service closures while clinical staff were redeployed to the pandemic response. Gay, bisexual and other men who have sex with men (gbMSM) face pre-existing sexual health inequalities which may have been exacerbated. The aim of this study is to understand sexual health service accessibility for gbMSM in Ireland during the COVID-19 crisis.

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The Risk Knowledge Infinity (RKI) Cycle Framework was featured as part of the ICH-sanctioned training materials supporting the recent issuance of ICH Q9(R1) To support ICH Q9(R1) understanding and adoption, this paper presents a case study on the application of the RKI Cycle, based on an underlying out-of-specification investigation. This case study provides a stepwise walk-through of the cycle to illustrate how key concepts within the ICH Q9(R1) revision can be achieved through better connecting quality risk management and knowledge management with a framework such as the RKI Cycle.

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Objectives: Designing a framework representing radiology results in a standards-based data structure using joint Radiological Society of North America/American College of Radiology Common Data Elements (CDEs) as the semantic labels on standard structures. This allows radiologist-created report data to integrate with artificial intelligence-generated results for use throughout downstream systems.

Materials And Methods: We developed a framework modeling radiology findings as Health Level 7 (HL7) Fast Healthcare Interoperability Resources (FHIR) observations using CDE set/element identifiers as standardized semantic labels.

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The deployment of artificial intelligence (AI) solutions in radiology practice creates new demands on existing imaging workflow. Accommodating custom integrations creates a substantial operational and maintenance burden. These custom integrations also increase the likelihood of unanticipated problems.

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