18 results on '"Curran T"'
Search Results
2. Commercial molecular diagnostic methods in infectious diseases: keeping up with the pathogens.
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Goldstein EJ, Moore C, Curran T, and Gunson RN
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- 2024
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3. Genomic Analysis and Surveillance of Respiratory Syncytial Virus Using Wastewater-Based Epidemiology.
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Allen DM, Reyne MI, Allingham P, Levickas A, Bell SH, Lock J, Coey JD, Carson S, Lee AJ, McSparron C, Nejad BF, McKenna J, Shannon M, Li K, Curran T, Broadbent LJ, Downey DG, Power UF, Groves HE, McKinley JM, McGrath JW, Bamford CGG, and Gilpin DF
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- Humans, Genomics methods, Wastewater-Based Epidemiological Monitoring, Phylogeny, Genome, Viral, Seasons, RNA, Viral genetics, Infant, Respiratory Syncytial Virus Infections epidemiology, Respiratory Syncytial Virus Infections virology, Respiratory Syncytial Virus, Human genetics, Respiratory Syncytial Virus, Human isolation & purification, Wastewater virology
- Abstract
Respiratory syncytial virus (RSV) causes severe infections in infants, immunocompromised or elderly individuals resulting in annual epidemics of respiratory disease. Currently, limited clinical surveillance and the lack of predictable seasonal dynamics limit the public health response. Wastewater-based epidemiology (WBE) has recently been used globally as a key metric in determining prevalence of severe acute respiratory syndrome coronavirus 2 in the community, but its application to other respiratory viruses is limited. In this study, we present an integrated genomic WBE approach, applying reverse-transcription quantitative polymerase chain reaction and partial G-gene sequencing to track RSV levels and variants in the community. We report increasing detection of RSV in wastewater concomitant with increasing numbers of positive clinical cases. Analysis of wastewater-derived RSV sequences permitted identification of distinct circulating lineages within and between seasons. Altogether, our genomic WBE platform has the potential to complement ongoing global surveillance and aid the management of RSV by informing the timely deployment of pharmaceutical and nonpharmaceutical interventions., Competing Interests: Potential conflicts of interest . All authors: No reported conflicts. All authors have submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Conflicts that the editors consider relevant to the content of the manuscript have been disclosed., (© The Author(s) 2024. Published by Oxford University Press on behalf of Infectious Diseases Society of America.)
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- 2024
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4. Wastewater monitoring of human and avian influenza A viruses in Northern Ireland: a genomic surveillance study.
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Lee AJ, Carson S, Reyne MI, Marshall A, Moody D, Allen DM, Allingham P, Levickas A, Fitzgerald A, Bell SH, Lock J, Coey JD, McSparron C, Nejad BF, Troendle EP, Simpson DA, Courtney DG, Einarsson GG, McKenna JP, Fairley DJ, Curran T, McKinley JM, Gilpin DF, Lemon K, McGrath JW, and Bamford CGG
- Abstract
Background: Influenza A viruses (IAVs) are significant pathogens of humans and other animals. Although endemic in humans and birds, novel IAV strains can emerge, jump species, and cause epidemics, like the latest variant of H5N1. Wastewater-based epidemiology (WBE) has been shown capable of detecting human IAVs. We aimed to assess whether whole-genome sequencing (WGS) of IAVs from wastewater is possible and can be used to discriminate between circulating strains of human and any non-human IAVs, such as those of avian origin., Methods: Using a pan-IAV RT-quantitative PCR assay, six wastewater treatment works (WWTWs) across Northern Ireland were screened from Aug 1 to Dec 5, 2022. A nanopore WGS approach was used to sequence RT-qPCR-positive samples. Phylogenetic analysis of sequences relative to currently circulating human and non-human IAVs was performed. For comparative purposes, clinical data (PCR test results) were supplied by The Regional Virus Laboratory, Belfast Health and Social Care Trust (Belfast, Northern Ireland, UK)., Findings: We detected a dynamic IAV signal in wastewater from Sept 5, 2022, onwards across Northern Ireland, which did not show a clear positive relationship with the clinical data obtained for the region. Meta (mixed strain) whole-genome sequences were generated from wastewater samples displaying homology to only human and avian IAV strains. The relative proportion of IAV reads of human versus avian origin differed across time and sample site. A diversity in subtypes and lineages was detected (eg, H1N1, H3N2, and several avian). Avian segment 8 related to those found in recent H5N1 clade 2.3.4.4b was identified., Interpretation: WBE affords a means to monitor circulating human and avian IAV strains and provide crucial genetic information. As such, WBE can provide rapid, cost-effective, year-round One Health surveillance to help control IAV epidemic and pandemic-related threats. However, optimisation of WBE protocols are necessary to ensure observed wastewater signals not only correlate with clinical case data, but yield information on the wider environmental pan-influenz-ome., Funding: Department of Health for Northern Ireland., Competing Interests: Declaration of interests DFG and JWM report grants from the Northern Ireland Department of Health and Public Health Agency. All other authors declare no competing interests., (Copyright © 2024 The Author(s). Published by Elsevier Ltd.. All rights reserved.)
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- 2024
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5. Extended Pharmacologic Prophylaxis for Venous Thromboembolism After Colon Cancer Surgery Is Associated With Improved Long-term Survival: A Natural Experiment in the Chemotherapeutic Benefit of Heparin Derivatives.
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Booth A, Brinton D, Donahue C, Westfal M, George V, Maxwell PJ, Simpson K, Mahvi D, and Curran T
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- Humans, Female, Male, Aged, Aged, 80 and over, Heparin, Low-Molecular-Weight therapeutic use, Colectomy adverse effects, Survival Rate, SEER Program, Retrospective Studies, United States epidemiology, Heparin therapeutic use, Colonic Neoplasms surgery, Colonic Neoplasms mortality, Venous Thromboembolism prevention & control, Venous Thromboembolism etiology, Anticoagulants therapeutic use, Postoperative Complications prevention & control, Postoperative Complications epidemiology
- Abstract
Objective: This large database study assessed whether extended pharmacologic prophylaxis for venous thromboembolism after colon cancer resection was associated with improved oncologic survival., Background: Heparin derivatives may confer an antineoplastic effect via a variety of mechanisms (eg, inhibiting angiogenesis in the tumor microenvironment). Studies evaluating the oncologic benefit of heparin and its derivatives have been limited in postsurgical patients. Multiple society guidelines recommend consideration of 30-day treatment with low molecular weight heparin to reduce venous thromboembolism risk after abdominopelvic cancer surgery. However, utilization of extended prophylaxis remains low., Methods: Surveillance, Epidemiology, and End Results-Medicare data were used to identify patients (age 65+) undergoing resection for nonmetastatic colon cancer from 2016 to 2017. The primary outcomes were overall and cancer-specific survival. Log-rank testing and multivariable Cox regression compared survival in patients who received extended prophylaxis versus those who did not in an inverse propensity treatment weighted cohort., Results: A total of 20,102 patients were included in propensity-weighting and analyzed. Eight hundred (3.98%) received extended pharmacologic prophylaxis. Overall survival and cancer-specific survival were significantly higher in patients receiving prophylaxis on log-rank tests ( P =0.0017 overall, P =0.0200 cancer-specific). Multivariable Cox regression showed improved overall survival [adjusted hazard ratio 0.66 (0.56-0.78)] and cancer-specific survival [adjusted hazard ratio 0.56 (0.39-0.81)] with prophylaxis after controlling for patient, treatment, and hospital factors., Conclusions: Extended pharmacologic prophylaxis after colon cancer resection was independently associated with improved overall and cancer-specific survival. These results suggest a potential antineoplastic effect from heparin derivatives when used in the context of preventing postsurgical venous thromboembolism., Competing Interests: The authors report no conflicts of interest., (Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.)
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- 2024
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6. Letter Regarding: Body Mass Index Does Not Predict Injury Pattern or Outcome After Motorcycle Crash.
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Bilaniuk JW, Ghodasara SK, Curran T, and Nemeth ZH
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- 2024
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7. The utility of 16S rRNA gene sequencing on intraoperative specimens from intracranial infections: an 8-year study in a regional UK neurosurgical unit.
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Shaw TD, Curran T, Cooke S, McMullan R, and Hunter M
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- Humans, Male, Female, Retrospective Studies, Middle Aged, Adult, Aged, United Kingdom, Adolescent, Neurosurgical Procedures methods, Young Adult, Anti-Bacterial Agents therapeutic use, Child, RNA, Ribosomal, 16S genetics
- Abstract
Background: Optimal management of intracranial infections relies on microbiological diagnosis and antimicrobial choice, but conventional culture-based testing is limited by pathogen viability and pre-sampling antimicrobial exposure. Broad-range 16S rRNA gene sequencing has been reported in the management of culture-negative infections but its utility in intracranial infection is not well-described. We studied the efficacy of 16S rRNA gene sequencing to inform microbiological diagnosis and antimicrobial choice in intracranial infections., Methods: This was a retrospective study of all intraoperative neurosurgical specimens sent for 16S rRNA gene sequencing over an 8-year period at a regional neurosurgical centre in the UK. Specimen selection was performed using multidisciplinary approach, combining neurosurgical and infection specialist discussion., Results: Twenty-five intraoperative specimens taken during neurosurgery from 24 patients were included in the study period. The most common reason for referral was pre-sampling antimicrobial exposure (68%). Bacterial rDNA was detected in 60% of specimens. 16S rRNA gene sequencing contributed to microbiological diagnosis in 15 patients and informed antimicrobial management in 10 of 24 patients with intracranial infection. These included targeted antibiotics after detection of a clinically-significant pathogen that had not been identified through other microbiological testing (3 cases), detection of commensal organisms in neurosurgical infection which justified continued broad cover (2 cases) and negative results from intracranial lesions with low clinical suspicion of bacterial infection which justified avoidance or cessation of antibiotics (5 cases)., Conclusion: Overall, 16S rRNA gene sequencing represented an incremental improvement in diagnostic testing and was most appropriately used to complement, rather than replace, conventional culture-based testing for intracranial infection.
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- 2024
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8. Future patterns in burden and incidence of squamous cell carcinoma of the anus in the United States, 2001-2035.
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Garg A, Damgacioglu H, Sigel K, Nyitray AG, Clifford GM, Curran T, Lazenby G, Meissner EG, Sterba K, Sonawane K, and Deshmukh AA
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- Humans, United States epidemiology, Male, Aged, Female, Incidence, Aged, 80 and over, Middle Aged, SEER Program, Adult, Cost of Illness, Anus Neoplasms epidemiology, Carcinoma, Squamous Cell epidemiology
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Squamous cell carcinoma of the anus (SCCA) incidence has been rising in the United States, particularly among older adults (≥65 years). We estimated the impact of this rise on future burden (through 2035) using age-period-cohort modeling. The SCCA burden (cases/year) is expected to rise, reaching approximately 2700 among men and approximately 7000 among women in 2031-2035 (burden during 2016-2020 among men and women was approximately 2150 and approximately 4600), with most cases 65 years of age or older (61% in men and 70% in women in 2031-2035; from 40% and 46% in 2016-2020). SCCA incidence (per 100 000) is projected to rise among older men aged 65-74, 75-84, and 85 years or older (5.0, 4.9, and 4.3 in 2031-2035 vs 3.7, 3.8, and 3.4 in 2016-2020, respectively) and women (11.2, 12.6, and 8.0 in 2031-2035 vs 8.2, 6.8, and 5.2 in 2016-2020, respectively). The projected rise in SCCA burden among older adults is troubling and highlights the importance of improving early detection and clinical care., (© The Author(s) 2024. Published by Oxford University Press. All rights reserved. For permissions, please email: journals.permissions@oup.com.)
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- 2024
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9. ABBV-319: a CD19-targeting glucocorticoid receptor modulator antibody-drug conjugate therapy for B-cell malignancies.
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Chang CA, Emberley E, D'Souza AL, Zhao W, Cosgrove C, Parrish K, Mitra D, Payson E, Oleksijew A, Ellis P, Rodriguez L, Duggan R, Hrusch C, Lasko L, Assaily W, Zheng P, Liu W, Hernandez A Jr, McCarthy K, Zhang Z, Rha G, Cao Z, Li Y, Perng O, Campbell J, Zhang G, Curran T, Bruncko M, Marvin CC, Hobson A, McPherson M, Uziel T, Pysz MA, Zhao X, Bankovich A, Hayflick J, McDevitt M, Freise KJ, Morgan-Lappe S, and Purcell JW
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- Humans, Animals, Mice, Antibodies, Monoclonal, Humanized pharmacology, Antibodies, Monoclonal, Humanized therapeutic use, Antibodies, Monoclonal, Humanized administration & dosage, Lymphoma, B-Cell drug therapy, Lymphoma, B-Cell pathology, Cell Line, Tumor, Mice, SCID, Female, Maytansine analogs & derivatives, Antigens, CD19 immunology, Immunoconjugates pharmacology, Immunoconjugates therapeutic use, Xenograft Model Antitumor Assays, Receptors, Glucocorticoid antagonists & inhibitors
- Abstract
Abstract: Glucocorticoids are key components of the standard-of-care treatment regimens for B-cell malignancy. However, systemic glucocorticoid treatment is associated with several adverse events. ABBV-319 is a CD19-targeting antibody-drug conjugate engineered to reduce glucocorticoid-associated toxicities while possessing 3 distinct mechanisms of action (MOA) to increase therapeutic efficacy: (1) antibody-mediated delivery of a glucocorticoid receptor modulator (GRM) payload to activate apoptosis, (2) inhibition of CD19 signaling, and (3) enhanced fragment crystallizable (Fc)-mediated effector function via afucosylation of the antibody backbone. ABBV-319 elicited potent GRM-driven antitumor activity against multiple malignant B-cell lines in vitro, as well as in cell line-derived xenografts and patient-derived xenografts (PDXs) in vivo. Remarkably, a single dose of ABBV-319 induced sustained tumor regression and enhanced antitumor activity compared with repeated dosing of systemic prednisolone at the maximum tolerated dose in mice. The unconjugated CD19 monoclonal antibody (mAb) also displayed antiproliferative activity in a subset of B-cell lymphoma cell lines through the inhibition of phosphoinositide 3-kinase signaling. Moreover, afucosylation of CD19 mAb enhanced Fc-mediated antibody-dependent cellular cytotoxicity. Notably, ABBV-319 displayed superior efficacy compared with afucosylated CD19 mAb in human CD34+ peripheral blood mononuclear cell-engrafted NSG-Tg(Hu-IL15) transgenic mice, demonstrating enhanced antitumor activity when multiple MOAs are enabled. ABBV-319 also showed durable antitumor activity across multiple B-cell lymphoma PDX models, including nongerminal center B-cell diffuse large B-cell lymphoma and relapsed lymphoma after R-CHOP treatment. Collectively, these data support the ongoing evaluation of ABBV-319 in a phase 1 clinical trial., (© 2024 American Society of Hematology. Published by Elsevier Inc. Licensed under Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0), permitting only noncommercial, nonderivative use with attribution. All other rights reserved.)
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- 2024
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10. Self-sensitized photodegradation and adsorption of aqueous malachite green dye using one-dimensional titanium oxide nanofilaments.
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Walter AD, Benamor H, Ferrer LM, Reji T, Curran T, Schwenk GR, Hadji M, Creighton MA, and Barsoum MW
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Truly one-dimensional titanium oxide nanofilaments with a lepidocrocite structure (1DLs) were explored in the adsorption and photocatalytic degradation of aqueous malachite green (MG), a toxic polluting dye. Decolorization is monitored by ultraviolet-visible spectroscopy, and mineralization is confirmed by total organic carbon analysis. The 1DL/MG flocs are characterized by scanning electron microscopy and X-ray diffraction. 1DLs, a colloidal nanomaterial, exhibit flocculating behavior while demonstrating high affinity for MG, with a maximum uptake of >680 mg/g rapidly via ion exchange. Additionally, 1DLs decolorize MG under visible light only , unlike most available titania products, via a self-sensitization effect. MG is decolorized by 1DLs by >70% in 30 min under 1 sun exposure of visible light. Counterintuitively, dye adsorption increases as the normalized concentration by mass of 1DL decreases. Demonstrating high adsorption capacity and dye mineralization supports the use of 1DLs in water treatment and self-sensitization for photoelectrochemical devices, like solar cells., Competing Interests: One of the authors, M.W.B., filed for a patent on the 1D titanate which is the subject of this work., (© 2024 The Author(s).)
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- 2024
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11. Combined Exercise and Mindset Training During a Pediatric Cardiac Fitness and Rehabilitation Program Benefits Youth with a Range of Congenital Heart Disease.
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Hansen K, Curran T, Reynolds L, Shafer K, Gauvreau K, and Gauthier N
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Pediatric cardiac fitness and rehabilitation programs vary widely in structure and content. The Cardiac Fitness Program (CFP) is built on traditional training pillars of aerobic, strength, and flexibility, and adds a fourth, training a positive mindset. This study assesses whether the systematic and comprehensive framework of the CFP results in broad benefits for a range of patients with congenital heart disease (CHD). Data from participants between 01/2017 and 12/2022 were analyzed. Pre- and post-CFP cardiopulmonary exercise test parameters, strength and flexibility metrics, and mindset survey results were compared overall, and by sex, age, diagnosis, and hemodynamic level. Of 62 participants (median age 15.5 years, range 8 to 23, 50% female), 3% had simple, 37% complex, 24% single ventricle CHD, and 35% arrhythmia, cardiomyopathy, or transplant. Significant improvements were noted in aerobic fitness (mean 9 ± 15% increase in % predicted peak oxygen consumption, p < 0.001). Strength metrics significantly improved (each p < 0.001), as did flexibility (p < 0.001). Patient-reported positive mindset scores did not improve significantly (mean increase 1.8 ± 5.1, p = 0.10, n = 25), whereas parents reported significant improvements (5.9 ± 10.4, p = 0.02, n = 20). Improvements were not significantly different by sex, age, diagnosis, or hemodynamic level. Comprehensive training across four pillars of fitness yields significant improvements in aerobic fitness, strength, flexibility, and parent-reported mindset scores for pediatric CHD patients, regardless of patient characteristics, diagnosis type, or severity of hemodynamic limitation. Further study is warranted into optimal standardization of training and whether a comprehensive approach amplifies individual pillars to create more than the sum of its parts., (© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
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- 2024
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12. Lack of Cutaneous B Cells Differentiates Lupus-Like Skin Disease in MRL/lpr Mice from Human Discoid Lupus.
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Yon J, Curran T, and Richardson CT
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- Animals, Mice, Humans, Disease Models, Animal, Female, Diagnosis, Differential, Lupus Erythematosus, Discoid immunology, Lupus Erythematosus, Discoid pathology, Lupus Erythematosus, Discoid diagnosis, B-Lymphocytes immunology, Mice, Inbred MRL lpr, Skin pathology, Skin immunology
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- 2024
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13. Predicting Accelerometer-Assessed Estimates of Adolescents' Multidimensional Physical Activity: A Self-Determination Theory Approach.
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Emm-Collison LG, Standage M, Gillison FB, and Curran T
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- Humans, Adolescent, Female, Male, Child, Sedentary Behavior, Psychological Theory, Surveys and Questionnaires, Adolescent Behavior psychology, Motivation, Exercise psychology, Personal Autonomy, Accelerometry, Personal Satisfaction
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Based on the tenets in self-determination theory, a dual-process model of motivational processes was tested to predict accelerometer-assessed estimates of adolescents' light physical activity (LPA), moderate to vigorous physical activity (MVPA), and sedentary time. Here, we hypothesized that (a) perceptions of psychological need support for exercise would be positively associated with LPA and MVPA and negatively associated with sedentary time via exercise-related psychological need satisfaction and autonomous exercise motivation and (b) perceptions of psychological need thwarting for exercise would be negatively associated with LPA and MVPA and positively associated with sedentary time via exercise-related psychological need frustration and controlled exercise motivation. Adolescents (N = 338; 234 female) age 11-15 years (M = 12.75, SD = .90) wore an ActiGraph accelerometer for 8 days and completed questionnaires pertaining to the self-determination-theory variables. Results showed psychological need support to indirectly and positively predict LPA and MVPA via psychological need satisfaction and autonomous exercise motivation. Although directly predictive of need frustration and indirectly predictive of controlled motivation and amotivation, the hypothesized effects from psychological need thwarting to the behavioral outcomes were nonsignificant. The current findings highlight the important role that need-supportive environments play in facilitating autonomous exercise motivation and behavior by being conducive to exercise-related psychological need satisfaction.
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- 2024
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14. Make No Apologies: Fear of Negative Evaluation, Depressive Symptoms, and the Mediating Role of Accounting for COVID-Safe Behavior Amongst People at High-Risk for Severe Illness.
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Seiter JS, Curran T, and Elwood RE
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- Humans, Fear psychology, Mental Health, Motivation, Depression diagnosis, Depression psychology, COVID-19 epidemiology
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With the goal of understanding unique and important threats to the mental health of people who are especially vulnerable to severe illness as a result of COVID-19, this study investigated associations between such individuals' fear of negative evaluation, tendency to "account for" practicing COVID-safe behaviors, and depressive symptoms. Grounded in perspectives on self-presentation, normative influence, and cognitive dissonance, we hypothesized that fear of negative evaluation would relate positively to accounting for COVID-safe behaviors, which, in turn, would associate positively with increased depressive symptoms. The results showed that increased fear of negative evaluation predicted an increased use of apologies and excuses, which in turn were positively related to depressive symptoms. Justifications for COVID-safe behaviors were not significantly associated with either fear of evaluation or depressive symptoms. The practical and theoretical implications are discussed.
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- 2024
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15. Negative Social Exchanges During the Pandemic, Loneliness, and the Mediating Role of Stress and Feeling Misunderstood Among People at High-Risk for COVID-19 Related Complications.
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Curran T, Seiter JS, Elwood RE, and Lindsay MC
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The goal of this study was to investigate the links between social interactions and mental health for people who are high-risk for COVID-19 complications. Specifically, we tested the relationships between negative social exchanges during the pandemic and loneliness through two mediators: stress and feeling misunderstood about one's health status. Data were collected via Amazon's MTurk from participants ( N = 271) who self-identified as being high-risk for COVID-19. The results from our model showed both a direct association between negative social interactions and loneliness, and an indirect link between these variables through stress. Overall, these results highlight the importance of understanding social interactions for people who are at high-risk for COVID-19 and their mental well-being. The results and implications are discussed.
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- 2024
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16. Blood and urine multi-omics analysis of the impact of e-vaping, smoking, and cessation: from exposome to molecular responses.
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Poussin C, Titz B, Xiang Y, Baglia L, Berg R, Bornand D, Choukrallah MA, Curran T, Dijon S, Dossin E, Dulize R, Etter D, Fatarova M, Medlin LF, Haiduc A, Kishazi E, Kolli AR, Kondylis A, Kottelat E, Laszlo C, Lavrynenko O, Eb-Levadoux Y, Nury C, Peric D, Rizza M, Schneider T, Guedj E, Calvino F, Sierro N, Guy P, Ivanov NV, Picavet P, Spinelli S, Hoeng J, and Peitsch MC
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- Humans, Cross-Sectional Studies, Multiomics, Vaping, Smoking Cessation, Exposome, Tobacco Products, Electronic Nicotine Delivery Systems
- Abstract
Cigarette smoking is a major preventable cause of morbidity and mortality. While quitting smoking is the best option, switching from cigarettes to non-combustible alternatives (NCAs) such as e-vapor products is a viable harm reduction approach for smokers who would otherwise continue to smoke. A key challenge for the clinical assessment of NCAs is that self-reported product use can be unreliable, compromising the proper evaluation of their risk reduction potential. In this cross-sectional study of 205 healthy volunteers, we combined comprehensive exposure characterization with in-depth multi-omics profiling to compare effects across four study groups: cigarette smokers (CS), e-vapor users (EV), former smokers (FS), and never smokers (NS). Multi-omics analyses included metabolomics, transcriptomics, DNA methylomics, proteomics, and lipidomics. Comparison of the molecular effects between CS and NS recapitulated several previous observations, such as increased inflammatory markers in CS. Generally, FS and EV demonstrated intermediate molecular effects between the NS and CS groups. Stratification of the FS and EV by combustion exposure markers suggested that this position on the spectrum between CS and NS was partially driven by non-compliance/dual use. Overall, this study highlights the importance of in-depth exposure characterization before biological effect characterization for any NCA assessment study., (© 2024. The Author(s).)
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- 2024
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17. Thyroid Hormone Suppresses Medulloblastoma Progression Through Promoting Terminal Differentiation of Tumor Cells.
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Yang Y, Valdés-Rives SA, Liu Q, Li Y, Tan J, Tan Y, Koch CA, Rong Y, Houser SR, Wei S, Cai KQ, Cheng SY, Curran T, Wechsler-Reya R, and Yang ZJ
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Hypothyroidism is commonly detected in patients with medulloblastoma (MB). A possible link between thyroid hormone (TH) signaling and MB pathogenicity has not been reported. Here, we find that TH plays a critical role in promoting tumor cell differentiation. Reduction in TH levels frees the TH receptor, TRα1, to bind to EZH2 and repress expression of NeuroD1, a transcription factor that drives tumor cell differentiation. Increased TH reverses EZH2-mediated repression of NeuroD1 by abrogating the binding of EZH2 and TRα1, thereby stimulating tumor cell differentiation and reducing MB growth. Importantly, TH-induced differentiation of tumor cells is not restricted by the molecular subgroup of MB. These findings establish an unprecedented association between TH signaling and MB pathogenicity, providing solid evidence for TH as a promising modality for MB treatment.
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- 2024
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18. Pangenome graphs improve the analysis of structural variants in rare genetic diseases.
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Groza C, Schwendinger-Schreck C, Cheung WA, Farrow EG, Thiffault I, Lake J, Rizzo WB, Evrony G, Curran T, Bourque G, and Pastinen T
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- Humans, Reproducibility of Results, Chromosome Mapping, Alleles, Rare Diseases genetics, Genomics
- Abstract
Rare DNA alterations that cause heritable diseases are only partially resolvable by clinical next-generation sequencing due to the difficulty of detecting structural variation (SV) in all genomic contexts. Long-read, high fidelity genome sequencing (HiFi-GS) detects SVs with increased sensitivity and enables assembling personal and graph genomes. We leverage standard reference genomes, public assemblies (n = 94) and a large collection of HiFi-GS data from a rare disease program (Genomic Answers for Kids, GA4K, n = 574 assemblies) to build a graph genome representing a unified SV callset in GA4K, identify common variation and prioritize SVs that are more likely to cause genetic disease (MAF < 0.01). Using graphs, we obtain a higher level of reproducibility than the standard reference approach. We observe over 200,000 SV alleles unique to GA4K, including nearly 1000 rare variants that impact coding sequence. With improved specificity for rare SVs, we isolate 30 candidate SVs in phenotypically prioritized genes, including known disease SVs. We isolate a novel diagnostic SV in KMT2E, demonstrating use of personal assemblies coupled with pangenome graphs for rare disease genomics. The community may interrogate our pangenome with additional assemblies to discover new SVs within the allele frequency spectrum relevant to genetic diseases., (© 2024. The Author(s).)
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- 2024
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