Publications by authors named "Ann O'Connor"

Glioblastoma multiforme (GBM) is a highly aggressive and incurable disease accounting for about 10,000 deaths in the USA each year. Despite the current treatment approach which includes surgery with chemotherapy and radiation therapy, there remains a high prevalence of recurrence. Notable improvements have been observed in persons receiving concurrent antihypertensive drugs such as renin angiotensin inhibitors (RAS) or the antidiabetic drug metformin with standard therapy.

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Angiotensin (Ang) III, a biologically active peptide of the renin angiotensin system (RAS) is predominantly known for its central effects on blood pressure. Our understanding of the RAS has evolved from the simplified, classical RAS, a hormonal system regulating blood pressure to a complex system affecting numerous biological processes. Ang II, the main RAS peptide has been widely studied, and its deleterious effects when overexpressed is well-documented.

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Current reports of adolescent bariatric surgery underutilization for treating severe obesity do not comprehensively assess the extent of existing disparities. We sought to describe national trends in adolescent bariatric surgery over a 9-year period and investigate previously described ethnoracial-, insurance-, income-, and geographic-based disparities. A cross-sectional analysis of adolescents aged 10-19 years who underwent bariatric surgery from 2009 to 2017 was conducted using Healthcare Cost and Utilization Kids' Inpatient Database and National Inpatient Sample Databases.

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15-Deoxy-Δ--prostaglandin J2 (15d-PGJ2) is an endogenous agonist of the ligand dependent transcriptional factor, peroxisome proliferator-activated receptor -gamma (PPAR-γ). Although PPAR-γ mediates some actions of 15d-PGJ2, many actions of 15d-PGJ2 are independent of PPAR-γ. The PPAR-γ signaling pathway has beneficial effects on tumor progression, inflammation, oxidative stress, and angiogenesis in numerous studies.

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Background: International studies show that dizziness and vertigo are a significant burden on the general population, with 20-30% experiencing symptoms over a lifetime. There are no Irish studies indicating prevalence. The aim of this study was to review primary care referrals for patients with dizziness and vertigo to an otolaryngology tertiary centre.

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Unlabelled: Head and neck paragangliomas (HNPGLs) are rare tumours with ~ 30% genetic mutations, mainly in succinate dehydrogenase (SDHx) genes. The utility of FDG PET-CT in HNPGLs is questioned by recent developments in novel radiotracers. We therefore performed a retrospective study in a single tertiary referral centre to address the utility of FDG PET/CT in HNPGLs.

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Introduction: ED visits for gastrostomy tube-related complications are common, and many are related to tube displacement. Evidence-based practices can provide standardized care.

Methods: This study was an evidence-based project to develop and implement an algorithm for the care of patients with a displaced gastrostomy tube in the emergency department.

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Background: Potentially, orally administered antibodies specific to enteric pathogens could be administered to infants to prevent diarrheal infections, particularly in developing countries where diarrhea is a major problem. However, to prevent infection, such antibodies would need to resist degradation within the gastrointestinal tract.

Methods: Palivizumab, a recombinant antibody specific to respiratory syncytial virus (RSV), was used in this study as a model for examining the digestion of neutralizing antibodies to enteric pathogens in infants.

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Coronavirus disease 2019 (COVID-19) is a viral respiratory illness caused by SARS-CoV-2. During January 21-July 25, 2020, in response to official requests for assistance with COVID-19 emergency public health response activities, CDC deployed 208 teams to assist 55 state, tribal, local, and territorial health departments. CDC deployment data were analyzed to summarize activities by deployed CDC teams in assisting state, tribal, local, and territorial health departments to identify and implement measures to contain SARS-CoV-2 transmission (1).

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Oral administration of engineered immunoglobulins has the potential to prevent enteric pathogen-induced diarrhea in infants. To prevent infection, these antibodies need to survive functionally intact in the proteolytic environment of the gastrointestinal tract. This research examined both and the functional survival across infant digestion of palivizumab, a model FDA-approved recombinant antibody against respiratory syncytial virus (RSV) F protein.

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We previously showed that Angiotensin (Ang) II stimulated pro-inflammatory and mitogenic actions in astrocytes suggesting that astrocytes are emerging as key players in neuroinflammation. Evidence suggests that neuroinflammation may contribute to central sympathetic overactivity and elevated blood pressure. Further, cyclooxygenase (Cox)-derived prostanoids were implicated in Ang II-dependent hypertension.

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Addressing the problem of childhood obesity is an important component of preventing type 2 diabetes. Although children and their families ultimately make decisions about diet, physical activity, and obesity management, many groups have a role in making these choices easier. They do this by providing families with tools and resources and by implementing policies and practices that support a healthy diet and physical activity in the places where children and their families spend their time.

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Physical activity can reduce the risk of at least 20 chronic diseases and conditions and provide effective treatment for many of these conditions. Yet, physical activity levels of Americans remain low, with only small improvements over 20 years. The Centers for Disease Control and Prevention (CDC) considered what would accelerate progress and, as a result, developed Active People, Healthy Nation, an aspirational initiative to improve physical activity in 2.

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The presence of a brain renin angiotensin system (RAS) is well documented. An overactive brain RAS contributes to the development and progression of cardiovascular and renal disorders among other conditions. In hypertension, an augmented brain RAS leads to an increase in sympathetic nervous system activity.

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Physical activity can help delay, prevent, or manage many of the chronic diseases for which adults aged ≥50 years are at risk (1-3). These diseases can impact the length and quality of life, as well as the long-term ability to live independently.* All adults aged ≥50 years, with or without chronic disease, gain health benefits by avoiding inactivity (2,3).

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Purpose: Despite significant radiation exposure involved with computed tomography (CT) in evaluation of pediatric appendicitis, its use is still widespread. The goal of this study was to assess the effect of a staged imaging pathway for appendicitis to significantly decrease CT use while maintaining diagnostic accuracy.

Methods: Chart review was performed for patients evaluated for appendicitis over a 12-month period prior to and after pathway implementation.

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The reports in this supplement document persistent disparities between some population groups in health outcomes, access to health care, adoption of health promoting behaviors, and exposure to health-promoting environments. Some improvements in overall rates and even reductions in some health disparities are noted; however, many gaps persist. These finding highlight the importance of monitoring health status, outcomes, behaviors, and exposures by population groups to assess trends and target interventions.

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Background: Data was prospectively collected on 850 consecutive patients undergoing central venous catheterisation (CVC) to receive total parenteral nutrition (TPN) in a major university teaching hospital over a 46 months period.

Methods: Data included information about CVC insertion and clinical outcomes, most notably, suspected catheter-related blood stream infections (CRBSI).

Results: The internal jugular vein was the most common site (n = 882, 68%), followed by the subclavian vein (n = 344, 24.

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Objective: Despite preservation of the recurrent laryngeal nerve (RLN), transient vocal cord paralysis (VCP) occurs after 1.2% to 10.9% of thyroidectomies.

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