2,890 results on '"E. Hamilton"'
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2. Evolution of STAT2 resistance to flavivirus NS5 occurred multiple times despite genetic constraints
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Ethan C. Veit, Madihah S. Salim, Mariel J. Jung, R. Blake Richardson, Ian N. Boys, Meghan Quinlan, Erika A. Barrall, Eva Bednarski, Rachael E. Hamilton, Caroline Kikawa, Nels C. Elde, Adolfo García-Sastre, and Matthew J. Evans
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Science - Abstract
Abstract Zika and dengue virus nonstructural protein 5 antagonism of STAT2, a critical interferon signaling transcription factor, to suppress the host interferon response is required for viremia and pathogenesis in a vertebrate host. This affects viral species tropism, as mouse STAT2 resistance renders only immunocompromised or humanized STAT2 mice infectable. Here, we explore how STAT2 evolution impacts antagonism. By measuring the susceptibility of 38 diverse STAT2 proteins, we demonstrate that resistance arose numerous times in mammalian evolution. In four species, resistance requires distinct sets of multiple amino acid changes that often individually disrupt STAT2 signaling. This reflects an evolutionary ridge where progressive resistance is balanced by the need to maintain STAT2 function. Furthermore, resistance may come with a fitness cost, as resistance that arose early in lemur evolution was subsequently lost in some lemur lineages. These findings underscore that while it is possible to evolve resistance to antagonism, complex evolutionary trajectories are required to avoid detrimental host fitness consequences.
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- 2024
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3. A microcosting approach for planning and implementing community-based mental health prevention programs: what does it cost?
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Sharmily Roy, Henry Shelton Brown, Lisa Sanger Blinn, Sarah Carter Narendorf, and Jane E. Hamilton
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Community based behavioral health program ,Mental health promotion ,Preventive/preventative program planning ,Microcosting ,Activity-based costing ,Start-up costs ,Medicine (General) ,R5-920 - Abstract
Abstract Background Estimating program costs when planning community-based mental health programs can be burdensome. Our aim was to retrospectively document the cost for the first year of planning and implementing Healthy Minds Healthy Communities (HMHC), a mental health promotion and prevention multi-level intervention initiative. This Program is among the first to use the Community Initiated Care (CIC) model in the US and is aimed at building community resilience and the capacity for communities to provide mental health support, particularly among those disproportionately impacted by COVID-19. Our objective is to share our methods for costing a program targeting 10 zip codes that are ethnically and linguistically diverse and provide an example for estimating the cost of a mental health prevention and promotion programs consisting of multiple evidence-based interventions. Methods We used a semi-structured interview process to collect cost data through the first year of program planning, start-up and initial implementation from key staff. We calculated costs for each activity, grouped them by major project categories, and identified the cost drivers of each category. We further validated cost estimates through extensive literature review. The cost analysis was done from the provider’s perspective, which included the implementing agency and its community partners. We delineated costs that were in-kind contributions to the program by other agency, and community partners. Sensitivity analyses were conducted to estimate uncertainty around parameters. Results For the first year of the development and implementation of the program, (funded through program and in-kind) is estimated at $1,382,669 (2022 US$). The costs for the three main activity domains for this project are: project management $135,822, community engagement $364,216 and design and execution $756,934. Overall, the cost drivers for the first year of this intervention were: hiring and onboarding staff, in-person community building/learning sessions, communications and marketing, and intervention delivery. Conclusion Implementation of community-based mental health promotion and prevention programs, when utilizing a participatory approach, requires a significant amount of upfront investment in program planning and development. A large proportion of this investment tends to be human capital input. Developing partnerships is a successful strategy for defraying costs.
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- 2024
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4. Lysyl Oxidase Regulates Epithelial Differentiation and Barrier Integrity in Eosinophilic EsophagitisSummary
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Masaru Sasaki, Takeo Hara, Joshua X. Wang, Yusen Zhou, Kanak V. Kennedy, Chizoba N. Umeweni, Maiya A. Alston, Zachary C. Spergel, Satoshi Ishikawa, Ryugo Teranishi, Ritsu Nakagawa, Emily A. Mcmillan, Kelly A. Whelan, Tatiana A. Karakasheva, Kathryn E. Hamilton, Melanie A. Ruffner, and Amanda B. Muir
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Lysyl Oxidase ,Organoid ,BMP ,Eosinophilic Esophagitis ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Background & Aims: Epithelial disruption in eosinophilic esophagitis (EoE) encompasses both impaired differentiation and diminished barrier integrity. We have shown that lysyl oxidase (LOX), a collagen cross-linking enzyme, is up-regulated in the esophageal epithelium in EoE. However, the functional roles of LOX in the esophageal epithelium remains unknown. Methods: We investigated roles for LOX in the human esophageal epithelium using 3-dimensional organoid and air–liquid interface cultures stimulated with interleukin (IL)13 to recapitulate the EoE inflammatory milieu, followed by single-cell RNA sequencing, quantitative reverse-transcription polymerase chain reaction, Western blot, histology, and functional analyses of barrier integrity. Results: Single-cell RNA sequencing analysis on patient-derived organoids revealed that LOX was induced by IL13 in differentiated cells. LOX-overexpressing organoids showed suppressed basal and up-regulated differentiation markers. In addition, LOX overexpression enhanced junctional protein genes and transepithelial electrical resistance. LOX overexpression restored the impaired differentiation and barrier function, including in the setting of IL13 stimulation. Transcriptome analyses on LOX-overexpressing organoids identified an enriched bone morphogenetic protein (BMP) signaling pathway compared with wild-type organoids. In particular, LOX overexpression increased BMP2 and decreased the BMP antagonist follistatin. Finally, we found that BMP2 treatment restored the balance of basal and differentiated cells. Conclusions: Our data support a model whereby LOX exhibits noncanonical roles as a signaling molecule important for epithelial homeostasis in the setting of inflammation via activation of the BMP pathway in the esophagus. The LOX/BMP axis may be integral in esophageal epithelial differentiation and a promising target for future therapies.
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- 2024
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5. Autophagy Contributes to Homeostasis in Esophageal Epithelium Where High Autophagic Vesicle Level Marks Basal Cells With Limited Proliferation and Enhanced Self-Renewal PotentialSummary
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Alena Klochkova, Adam L. Karami, Annie D. Fuller, Louis R. Parham, Surali R. Panchani, Shruthi Natarajan, Jazmyne L. Jackson, Anbin Mu, Yinfei Tan, Kathy Q. Cai, Andres J. Klein-Szanto, Amanda B. Muir, Marie-Pier Tétreault, Xavier Graña, Kathryn E. Hamilton, and Kelly A. Whelan
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Esophageal Epithelium ,Autophagy ,ATG7 ,Basal Cell Dynamics ,Esophageal Progenitor Cells ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Background & Aims: Autophagy plays roles in esophageal pathologies both benign and malignant. Here, we aim to define the role of autophagy in esophageal epithelial homeostasis. Methods: We generated tamoxifen-inducible, squamous epithelial-specific Atg7 (autophagy related 7) conditional knockout mice to evaluate effects on esophageal homeostasis and response to the carcinogen 4-nitroquinoline 1-oxide (4NQO) using histologic and biochemical analyses. We fluorescence-activated cell sorted esophageal basal cells based on fluorescence of the autophagic vesicle (AV)-identifying dye Cyto-ID and then subjected these cells to transmission electron microscopy, image flow cytometry, three-dimensional organoid assays, RNA sequencing, and cell cycle analysis. Three-dimensional organoids were subjected to passaging, single-cell RNA sequencing, cell cycle analysis, and immunostaining. Results: Genetic autophagy inhibition in squamous epithelium resulted in increased proliferation of esophageal basal cells under homeostatic conditions and also was associated with significant weight loss in mice treated with 4NQO that further displayed perturbed epithelial tissue architecture. Esophageal basal cells with high AV level (Cyto-IDHigh) displayed limited organoid formation capability on initial plating but passaged more efficiently than their counterparts with low AV level (Cyto-IDLow). RNA sequencing suggested increased autophagy in Cyto-IDHigh esophageal basal cells along with decreased cell cycle progression, the latter of which was confirmed by cell cycle analysis. Single-cell RNA sequencing of three-dimensional organoids generated by Cyto-IDLow and Cyto-IDHigh cells identified expansion of 3 cell populations and enrichment of G2/M-associated genes in the Cyto-IDHigh group. Ki67 expression was also increased in organoids generated by Cyto-IDHigh cells, including in basal cells localized beyond the outermost cell layer. Conclusions: Autophagy contributes to maintenance of the esophageal proliferation-differentiation gradient. Esophageal basal cells with high AV level exhibit limited proliferation and generate three-dimensional organoids with enhanced self-renewal capacity.
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- 2024
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6. IGF2BP1/IMP1 Deletion Enhances a Facultative Stem Cell State via Regulation of MAP1LC3BSummary
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Louis R. Parham, Patrick A. Williams, Kay Katada, Shaneice K. Nettleford, Priya Chatterji, Kofi K. Acheampong, Charles H. Danan, Xianghui Ma, Lauren A. Simon, Kaitlyn E. Naughton, Rei Mizuno, Tatiana Karakasheva, Emily A. McMillan, Kelly A. Whelan, Donita C. Brady, Sydney M. Shaffer, and Kathryn E. Hamilton
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Autophagy ,regeneration ,post-transcriptional gene regulation ,intestinal homeostasis ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Background & Aims: The intestinal epithelium interfaces with a diverse milieu of luminal contents while maintaining robust digestive and barrier functions. Facultative intestinal stem cells are cells that survive tissue injury and divide to re-establish the epithelium. Prior studies have shown autophagic state as functional marker of facultative intestinal stem cells, but regulatory mechanisms are not known. The current study evaluated a post-transcriptional regulation of autophagy as an important factor for facultative stem cell state and tissue regeneration. Methods: We evaluated stem cell composition, autophagic vesicle content, organoid formation, and in vivo regeneration in mice with intestinal epithelial deletion of the RNA binding protein IGF2 messenger RNA binding protein 1 (IMP1). The contribution of autophagy to resulting in vitro and in vivo phenotypes was evaluated via genetic inactivation of Atg7. Molecular analyses of IMP1 modulation of autophagy at the protein and transcript localization levels were performed using IMP1 mutant studies and single-molecule fluorescent in situ hybridization. Results: Epithelial Imp1 deletion reduced leucine rich repeat containing G protein coupled receptor 5 cell frequency but enhanced both organoid formation efficiency and in vivo regeneration after irradiation. We confirmed prior studies showing increased autophagy with IMP1 deletion. Deletion of Atg7 reversed the enhanced regeneration observed with Imp1 deletion. IMP1 deletion or mutation of IMP1 phosphorylation sites enhanced expression of essential autophagy protein microtubule-associated protein 1 light chain 3β. Furthermore, immunofluorescence imaging coupled with single-molecule fluorescent in situ hybridization showed IMP1 colocalization with MAP1LC3B transcripts at homeostasis. Stress induction led to decreased colocalization. Conclusions: Depletion of IMP1 enhances autophagy, which promotes intestinal regeneration via expansion of facultative intestinal stem cells.
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- 2024
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7. English as a Foreign Language: Teachers' Use of Intercultural Competence Tests to Inform Teaching Practice
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Jr. William E. Hamilton
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This qualitative case study explored the influence of self-reported intercultural competence (IC) on the teaching practices of adult English as a Foreign Language (EFL) teachers in culturally diverse online classrooms. The researcher examined how EFL teachers used IC test results to inform their teaching. The research used a bounded system, purposive and snowball sampling, and four EFL teachers. Data collection involved an online IC test and semistructured interviews. The findings indicated that EFL teachers with higher IC demonstrated increased cultural sensitivity and responsiveness in their teaching practices, leading to perceptions of inclusive and engaging learning environments for culturally diverse students. The researcher acknowledged the challenges of measuring and assessing IC as a requirement for EFL teachers and recognized the limitation of a small sample size. Future research should explore effective strategies for integrating IC assessments into EFL teacher training programs and investigate larger and more diverse samples to enhance generalizability. The study contributed to two conceptual frameworks, one based on EFL teachers' perspectives and the other aligned with the research question, problem, and purpose. It underscored the significance of incorporating culturally responsive teaching practices in EFL teacher training programs, professional development, and pedagogy to promote effective intercultural communication and foster inclusive learning environments. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]
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- 2023
8. Development of an implementation science informed 'Test Evidence Transition' program to improve cancer outcomes
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Kate E. Hamilton-West, Alexandra Feast, Natalie A. Masento, Brian Knowles, Claire Sloan, and Luke Weaver
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cancer ,implementation science ,behavioral science ,evaluation ,implementation research ,quality improvement ,Medicine - Abstract
IntroductionTranslation of cancer research into practice takes around 15 years. Programs informed by implementation science methods and frameworks offer potential to improve cancer outcomes by addressing the implementation gap.MethodsWe describe the development of a Test Evidence Transition (TET) program which provides funding and support to health system delivery teams and project design and evaluation partners working together to achieve three objectives: Test innovations to support optimal cancer pathways that transform clinical practice; Evidence the process, outcome, and impact of implementation; and work with strategic partners to ensure the Transition of best practice into effective and equitable adoption across UK health systems.ResultsPhase 1 launched in April 2023. Teams with the capability and motivation to implement evidence-based pathway innovations were identified and invited to submit expressions of interest. Following peer-review, teams were supported to develop full proposals with input from academics specializing in health services research, evaluation, and implementation science. Projects were selected for funding, providing an opportunity to implement and evaluate innovations with support from academic and health system partners.ConclusionsTET aims to improve cancer outcomes by identifying and addressing local-level barriers to evidence-based practice and translating findings into consistent and equitable adoption across health systems. Phase 1 projects focus on pathway innovations in diagnosis for breast and prostate cancer. We are now launching Phase 2, focusing on colorectal cancer.
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- 2024
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9. Correction: A microcosting approach for planning and implementing community‑based mental health prevention programs: what does it cost?
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Sharmily Roy, Henry Shelton Brown, Lisa Sanger Blinn, Sarah Carter Narendorf, and Jane E. Hamilton
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Medicine (General) ,R5-920 - Published
- 2024
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10. Effects of a β-Glucan-Rich Blend of Medicinal Mushrooms and Botanicals on Innate Immune Cell Activation and Function Are Enhanced by a Very Low Dose of Bovine Colostrum Peptides
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Gitte S. Jensen, Dina Cruickshank, and Debby E. Hamilton
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β-glucans ,CD69 ,IL-1β ,IL-1ra ,IL-6 ,IL-10 ,Organic chemistry ,QD241-441 - Abstract
Nutraceutical immune support offers potential for designing blends with complementary mechanisms of action for robust support of innate immune alertness. We documented enhanced immune activation when bovine colostrum peptides (BC-Pep) were added to an immune blend (IB) containing β-glucans from yeast, shiitake, maitake, and botanical non-β-glucan polysaccharides. Human peripheral blood mononuclear cells (PBMCs) were cultured with IB, BC-Pep, and IB + BC-Pep for 20 h, whereafter expression of the activation marker CD69 was evaluated on NK cells, NKT cells, and T cells. Cytokine levels were tested in culture supernatants. PBMCs were co-cultured with K562 target cells to evaluate T cell-mediated cytotoxicity. IB + BC-Pep triggered highly significant increases in IL-1β, IL-6, and TNF-α, above that of cultures treated with matching doses of either IB or BC-Pep. NK cell and T cell activation was increased by IB + BC-Pep, reaching levels of CD69 expression several fold higher than either BC-Pep or IB alone. IB + BC-Pep significantly increased T cell-mediated cytotoxic killing of K562 target cells. This synergistic effect suggests unique amplification of signal transduction of NK cells and T cells due to modulation of IB-induced signaling pathways by BC-Pep and is of interest for further pre-clinical and clinical testing of immune defense activity against virally infected and transformed cells.
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- 2024
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11. Evaluating Robust Entanglement on a Trapped Ion Platform.
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Kathleen E. Hamilton, Titus Morris, Raphael C. Pooser, Kübra Yeter-Aydeniz, Luning Zhao, Nouamane Laanait, Harrison Cooley, Muhun Kang, George Barron, Sophia E. Economou, Akhil Francis, and Alexander F. Kemper
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- 2023
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12. The utility of orbital imaging in the evaluation of orbital disease.
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Min Joung Lee, Rohan Verma, Bronwyn E Hamilton, David Pettersson, Dongseok Choi, Eun Soo Kim, Bobby S Korn, Don O Kikkawa, and James T Rosenbaum
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Medicine ,Science - Abstract
PurposeThis study investigates the accuracy of either computerized tomography (CT) or magnetic resonance imaging (MRI) for the evaluation of various orbital diseases.MethodsWe collected 126 CT scans and 65 MRI scans from 144 subjects and asked two radiologists to interpret the images without clinical information. Images included 14 with a clinical diagnosis of orbital infection, 144 with orbital inflammation, and 33 with orbital neoplasm. The inflammatory diseases included thyroid eye disease (TED, n = 69), non-specific orbital inflammation (NSOI, n = 44), IgG4-related disease (IgG4-RD, n = 15), sarcoidosis (Sarcoid, n = 9), granulomatosis with polyangiitis (GPA, n = 5), and Erdheim-Chester disease (ECD, n = 2).ResultsThe balanced accuracy (BA) for the two radiologists ranged from 0.87 to 0.90 for cellulitis, 0.81 to 0.86 for inflammation, and 0.82 to 0.85 for neoplasm. Radiologists were excellent at recognizing GPA (BA = 0.98 to 0.99) and very good for TED (BA = 0.80 to 0.86). They also did well identifying IgG4-RD (BA = 0.75 to 0.77), but slightly less well for NSOI (BA = 0.69 to 0.75) and poorly for Sarcoid (BA = 0.48 to 0.50).ConclusionsCT or MRI scanning contributes to the evaluation of patients with orbital disease, but accuracy does varies based depending on the diagnosis. We could not evaluate issues such as determination of disease activity, variability based on the unit used for imaging or the skills beyond those of our two specialized neuroradiologists. Future studies should directly compare the two imaging modalities and assess the utility of imaging to determine disease activity.
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- 2024
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13. Secreted Metabolites from Pseudomonas, Staphylococcus, and Borrelia Biofilm: Modulation of Immunogenicity by a Nutraceutical Enzyme and Botanical Blend
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Dina Cruickshank, Debby E. Hamilton, Ifeanyi Iloba, and Gitte S. Jensen
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cytokines ,interleukin-1β ,interleukin-6 ,interleukin-10 ,immune activation ,inflammation ,Biology (General) ,QH301-705.5 - Abstract
Bacterial biofilms are hardy, adaptable colonies, evading immune recognition while triggering and sustaining inflammation. The goals for this study were to present a method for testing the immunogenicity of secreted metabolites from pathogenic biofilm and to document whether biofilm treated with a nutraceutical enzyme and botanical blend (NEBB) showed evidence of reprogrammed bacterial metabolism, potentially becoming more recognizable to the immune system. We screened immune-modulating properties of metabolites from established biofilm from Pseudomonas aeruginosa (Pa), Stapholycoccus simulans (Ss), and Borrelia burgdorferi (Bb). Secreted metabolites significantly increased the cytokine production by human peripheral blood mononuclear cells, including Interleukin-1-beta (IL-1β), Interleukin-6 (IL-6), macrophage inflammatory protein-1-alpha (MIP-1α), tumor necrosis factor-alpha (TNF-α), interleukin-1 receptor antagonist (IL-1ra), and interleukin-10 (IL-10). Pa metabolites triggered the most robust increase in IL-1β, whereas Bb metabolites triggered the most robust increase in IL-10. NEBB-disrupted biofilm produced metabolites triggering altered immune modulation compared to metabolites from untreated biofilm. Metabolites from NEBB-disrupted biofilm triggered increased MIP-1α levels and reduced IL-10 levels, suggesting a reduced ability to suppress the recruitment of phagocytes compared to untreated biofilm. The results suggest that nutraceutical biofilm disruption offers strategies for inflammation management in chronic infectious illnesses. Further clinical studies are warranted to evaluate clinical correlations in infected human hosts.
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- 2024
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14. Evidence for the Presence of Thin and Heterogenous Dust Deposits on Ryugu's Boulders From Hayabusa2 MARA and Sample Data
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M. Hamm, V. E. Hamilton, and C. A. Goodrich
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(162173) Ryugu ,mid‐infrared ,spectroscopy ,dust ,thermal modeling ,Geophysics. Cosmic physics ,QC801-809 - Abstract
Abstract Middle infrared spectral results obtained in‐situ by the Hayabusa2 MARA instrument are generally in‐line with previous results and a new comparison with sample C0137 returned from asteroid (162173) Ryugu, being similar to an aqueously altered CI1 chondrite. The mid‐IR spectrum of the boulder on Ryugu measured by MARA is shallower around 9 μm compared to the laboratory spectrum of C0137. Here we show that discontinuous, fine dust deposits can partially explain the differences in the spectral data and remain in agreement with the temperature observations of the boulder by MARA if an opaque dust layer covers less than 3% of the field of view. Such a presence of dust covering a low porosity boulder was discounted by previous analysis of the mid‐infrared MARA data which did not consider a highly porous boulder as we do here.
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- 2023
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15. The effect of automation on helicopter crew communication : a low-fidelity investigation
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MacIsaac, Margaret A., Gerald D. Gibb, Daniel J. Garland, Bruce E. Hamilton, Maclsaac, Margaret A., MacIsaac, Margaret A., Gerald D. Gibb, Daniel J. Garland, Bruce E. Hamilton, and Maclsaac, Margaret A.
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- Aeronautics Human factors., Aeronautical instruments., Helicopters., Aéronautique Facteurs humains., Aéronautique Instruments., Hélicoptères., helicopters., Aeronautical instruments, Aeronautics Human factors, Helicopters
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Increasing levels of technology have changed the task of flying modern helicopter cockpits by allowing many crew functions to be performed automatically. This study attempted to understand the relation between automation and helicopter crew coordination. Twenty-eight helicopter pilots were assigned to two-person crews and asked to fly a simulated mission in either automated or manual conditions using a low-fidelity helicopter simulator. Communication was transcribed and coded into a nine-category content classification system by two trained raters. The inter-rater reliability was +.84. Results indicated that a higher frequency of total communications was demonstrated during manual flights. The interaction of Pilot Position by Automation Level was significant (p<.05) for three of the communication content categories: Observations, Suggestions, Statements of Intent. The results are discussed in terms of their implications for communications and Crew Resource Management (CRM) training for crews flying advanced technology helicopters.
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- 2024
16. Quantum Machine Learning Applications in High-Energy Physics.
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Andrea Delgado 0002 and Kathleen E. Hamilton
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- 2022
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17. Characterizing the memory capacity of transmon qubit reservoirs.
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Samudra Dasgupta, Kathleen E. Hamilton, and Arnab Banerjee
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- 2022
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18. Phyllosilicate Decomposition on Bennu Due to Prolonged Surface Exposure
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Romy D. Hanna, Victoria E. Hamilton, Chris H. Haberle, Hannah H. Kaplan, Cateline Lantz, Phil R. Christensen, Amy A. Simon, and Dennis C. Reuter
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Solar Physics ,Space Sciences (General) - Abstract
The Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS-REx) mission to carbonaceous asteroid (101955) Bennu performed detailed mapping with a suite of instruments to characterize the composition and geology of its surface. Here we use data from the OSIRIS-REx Thermal Emission Spectrometer (OTES) instrument to investigate the relationship of OTES-derived spectral indices to other derived data products from OTES, the OSIRIS-REx Camera Suite (OCAMS), and the OSIRIS-REx Visible and InfraRed Spectrometer (OVIRS) at global and local scales. We quantitatively confirm that high values of the OTES silicate stretching slope (from ∼10 to ∼12 μm) in midday spectra that are indicative of thin and/or patchy dust cover are strongly associated with low thermal inertia (high porosity), low albedo boulders on Bennu. These high porosity boulders have brecciated textures with embedded clasts that likely originated on Bennu's parent body or during its disruption. The high porosity of these boulders is a key factor in the local production of the dust or its entrapment, as some large, brecciated boulders with a lower porosity have little evidence of dust. A second OTES spectral parameter, the silicate bending band depth near 22.7 μm applied to early evening spectra, is not correlated to thermal inertia, but is weakly to strongly correlated to albedo, OVIRS-derived 1.05 μm and 2.74 μm band depths, OVIRS-derived hydrogen abundance, and modeled nanophase troilite abundance. In several regions on Bennu there is a strong spatial relationship between these parameters, whereby areas with shallower silicate bending bands also have shallower 1.05 μm and 2.74 μm bands and lower albedo with higher nanophase troilite abundances. These correlations, combined with analysis of the silicate bending band in laboratory experiments of space weathered and mildly heated carbonaceous chondrites, suggests that decreased silicate bending band depths signify decomposition of phyllosilicates, likely Fe-bearing, due to space weathering or mild heating (<600 °C) via solar radiation during Bennu's time in near-Earth space. There is a strong association of larger silicate bending band depths in areas dominated by small rocks and unresolved material and in areas with small (≤ 25 m) craters identified as the spectrally reddest on Bennu, suggesting that this material has been more recently exposed due to impact and/or mass wasting processes. The shallowest silicate bending depths are associated with larger rocks and boulders that appear to have the longest surface exposure history, although there is band depth variation among them suggesting either initial composition variation that resulted in different responses to space weathering or heating, or varied exposure history of individual boulders themselves. We predict that any grains returned from Bennu with a significant surface exposure history will be characterized by shallower 22.7 μm, 1.05 μm and 2.7 μm band depths and increased sulfide (troilite) abundance, as well as textural and chemical evidence for phyllosilicate dehydration.
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- 2023
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19. Rocks with Extremely Low Thermal Inertia at the OSIRIS-REx Sample Site on Asteroid Bennu
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Andrew J. Ryan, Benjamin Rozitis, Daniel Pino Munoz, Kris J. Becker, Joshua P. Emery, Michael C. Nolan, Marc Bernacki, Marco Delbo, Catherine M. Elder, Matthew Siegler, Erica R. Jawin, Dathon R. Golish, Kevin J. Walsh, Christopher W. Haberle, Carina A. Bennett, Kenneth L. Edmundson, Victoria E. Hamilton, Phillip R. Christensen, Michael G. Daly, and Dante S. Lauretta
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Asteroids ,Asteroid surfaces ,Planetary science ,Remote sensing ,Near-Earth objects ,Astronomy ,QB1-991 - Abstract
The Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS-REx) mission recently returned a sample of rocks and dust collected from asteroid Bennu. We analyzed the highest-resolution thermal data obtained by the OSIRIS-REx Thermal Emission Spectrometer (OTES) to gain insight into the thermal and physical properties of the sampling site, including rocks that may have been sampled, and the immediately surrounding Hokioi Crater. After correcting the pointing of the OTES data sets, we find that OTES fortuitously observed two dark rocks moments before they were contacted by the spacecraft. We derived thermal inertias of 100–150 (±50) J m ^−2 K ^−1 s ^−1/2 for these two rocks—exceptionally low even compared with other previously analyzed dark rocks on Bennu (180–250 J m ^−2 K ^−1 s ^−1/2 ). Our simulations indicate that monolayer coatings of sand- to pebble-sized particles, as observed on one of these rocks, could significantly reduce the apparent thermal inertia and largely mask the properties of the substrate. However, the other low-thermal-inertia rock that was contacted is not obviously covered in particles. Moreover, this rock appears to have been partially crushed, and thus potentially sampled, by the spacecraft. We conclude that this rock may be highly fractured and that it should be sought in the returned sample to better understand its origin in Bennu’s parent body and the relationship between its thermal and physical properties.
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- 2024
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20. Noise Robustness of Data Re-Uploading Quantum Classifiers.
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Daniel E. Molina and Kathleen E. Hamilton
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- 2023
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21. Characterizing Quantum Classifier Utility in Natural Language Processing Workflows.
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Kathleen E. Hamilton, Mayanka Chandra Shekar, John Gounley, Dhanvi Bharadwaj, Prasanna Date, Eduardo Antonio Coello Pérez, In-Saeng Suh, and Georgia D. Tourassi
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- 2023
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22. Mode connectivity in the QCBM loss landscape: ICCAD Special Session Paper.
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Kathleen E. Hamilton, Emily Lynn, Vicente Leyton-Ortega, Swarnadeep Majumder, and Raphael C. Pooser
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- 2021
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23. Metabolite-based dietary supplementation in human type 1 diabetes is associated with microbiota and immune modulation
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Kirstine J. Bell, Sonia Saad, Bree J. Tillett, Helen M. McGuire, Sara Bordbar, Yu Anne Yap, Long T. Nguyen, Marc R. Wilkins, Susan Corley, Shannon Brodie, Sussan Duong, Courtney J. Wright, Stephen Twigg, Barbara Fazekas de St Groth, Leonard C. Harrison, Charles R. Mackay, Esteban N. Gurzov, Emma E. Hamilton-Williams, and Eliana Mariño
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Type 1 diabetes ,SCFAs ,Microbiota ,Immune regulation ,Dietary-metabolites ,Autoimmunity ,Microbial ecology ,QR100-130 - Abstract
Abstract Background Short-chain fatty acids (SCFAs) produced by the gut microbiota have beneficial anti-inflammatory and gut homeostasis effects and prevent type 1 diabetes (T1D) in mice. Reduced SCFA production indicates a loss of beneficial bacteria, commonly associated with chronic autoimmune and inflammatory diseases, including T1D and type 2 diabetes. Here, we addressed whether a metabolite-based dietary supplement has an impact on humans with T1D. We conducted a single-arm pilot-and-feasibility trial with high-amylose maize-resistant starch modified with acetate and butyrate (HAMSAB) to assess safety, while monitoring changes in the gut microbiota in alignment with modulation of the immune system status. Results HAMSAB supplement was administered for 6 weeks with follow-up at 12 weeks in adults with long-standing T1D. Increased concentrations of SCFA acetate, propionate, and butyrate in stools and plasma were in concert with a shift in the composition and function of the gut microbiota. While glucose control and insulin requirements did not change, subjects with the highest SCFA concentrations exhibited the best glycemic control. Bifidobacterium longum, Bifidobacterium adolescentis, and vitamin B7 production correlated with lower HbA1c and basal insulin requirements. Circulating B and T cells developed a more regulatory phenotype post-intervention. Conclusion Changes in gut microbiota composition, function, and immune profile following 6 weeks of HAMSAB supplementation were associated with increased SCFAs in stools and plasma. The persistence of these effects suggests that targeting dietary SCFAs may be a mechanism to alter immune profiles, promote immune tolerance, and improve glycemic control for the treatment of T1D. Trial registration ACTRN12618001391268. Registered 20 August 2018, https://www.anzctr.org.au/Trial/Registration/TrialReview.aspx?id=375792 Video Abstract
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- 2022
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24. Mid-infrared emissivity of partially dehydrated asteroid (162173) Ryugu shows strong signs of aqueous alteration
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M. Hamm, M. Grott, H. Senshu, J. Knollenberg, J. de Wiljes, V. E. Hamilton, F. Scholten, K. D. Matz, H. Bates, A. Maturilli, Y. Shimaki, N. Sakatani, W. Neumann, T. Okada, F. Preusker, S. Elgner, J. Helbert, E. Kührt, T.-M. Ho, S. Tanaka, R. Jaumann, and S. Sugita
- Subjects
Science - Abstract
Spectral characteristics can be used to link asteroid and meteorite materials. Here, the authors show in-situ mid-infrared data of a boulder on asteroid Ryugu, compared with laboratory spectra of various meteorites, indicate that Ryugu experienced strong aqueous alteration prior to dehydration.
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- 2022
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25. CD73+ Epithelial Progenitor Cells That Contribute to Homeostasis and Renewal Are Depleted in Eosinophilic EsophagitisSummary
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Takeo Hara, Yuta Kasagi, Joshua Wang, Masaru Sasaki, Bailey Aaron, Adam Karami, Masataka Shimonosono, Rieko Shimonosono, Hisatsugu Maekawa, Lauren Dolinsky, Benjamin Wilkins, Jeremy Klein, Jane Wei, Kathryn Nunes, Kristle Lynch, Jonathan M. Spergel, Kathryn E. Hamilton, Melanie A. Ruffner, Tatiana A. Karakasheva, Kelly A. Whelan, Hiroshi Nakagawa, and Amanda B. Muir
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Eosinophilic Esophagitis ,Epithelium ,Organoids ,CD73 ,CD104 ,Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
Background & Aims: Although basal cell hyperplasia is a histologic hallmark of eosinophilic esophagitis (EoE), little is known about the capabilities of epithelial renewal and differentiation in the EoE inflammatory milieu. In murine esophageal epithelium, there are self-renewing and slowly proliferating basal stem-like cells characterized by concurrent expression of CD73 (5'-nucleotidase ecto) and CD104 (integrin β4). Here, we investigated CD73+CD104+ cells within the basal population of human esophageal epithelium and clarified the biological significance of these cells in the EoE epithelium. Methods: We performed flow cytometry on esophageal biopsy samples from EoE and non-EoE patients to determine the quantity of CD73+CD104+ cells in the epithelium. Simulating the EoE milieu we stimulated primary patient-derived and immortalized cell line–derived esophageal organoids with interleukin (IL)4 and IL13 and analyzed by flow cytometry, immunohistochemistry, and quantitative reverse-transcription polymerase chain reaction. We performed single-cell RNA sequencing on primary organoids in the setting of IL13 stimulation and evaluated the CD73+CD104+ population. We performed fluorescent-activated cell sorting to purify CD73+CD104+ and CD73- CD104+ populations and seeded these groups in organoid culture to evaluate the organoid formation rate and organoid size. We used RNA interference to knock down CD73 in esophageal organoids to evaluate organoid formation rates and size. We evaluated the effects of signal transducer and activator of transcription 6 (STAT6) signaling inhibition by RNA interference, a STAT6 inhibitor, AS1517499, as well as the proton pump inhibitor omeprazole. Results: EoE patients showed decreased epithelial CD73+CD104+ cell content. IL4 and IL13 stimulation depleted this population in 3-dimensional organoids with a recapitulation of basal cell hyperplasia as corroborated by single-cell RNA sequencing of the organoids, which suggests depletion of CD73+CD104+ cells. The CD73+CD104+ population had enhanced organoid formation compared with the CD73-CD104+ population. Similarly, knock-down of CD73 resulted in decreased organoid formation rate. Genetic and pharmacologic inhibition of STAT6 prevented T helper 2 cytokine-induced depletion of CD73+CD104+ cells. Lastly, omeprazole treatment prevented the effects of IL4 and IL13 on the CD73+CD104+ population. Conclusions: This study addressed the role of CD73+CD104+ cells in epithelial renewal and homeostasis in the context of EoE. The depletion of the CD73+CD104+ self-renewal population by helper T cell 2 cytokines in EoE milieu may be perpetuating epithelial injury. Future therapies targeting epithelial restitution in EoE could decrease the need for immune modulation and steroid therapy.
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- 2022
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26. Extracting Adherence Information from Electronic Health Records.
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Jordan Sanders, Meghana Gudala, Kathleen E. Hamilton, Nishtha Prasad, Jordan Godfrey-Stovall, Eduardo Blanco 0002, Jane Elizabeth Hamilton, and Kirk Roberts
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- 2020
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27. Predicting the Focus of Negation: Model and Error Analysis.
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Md Mosharaf Hossain, Kathleen E. Hamilton, Alexis Palmer, and Eduardo Blanco 0002
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- 2020
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28. Spike-based graph centrality measures.
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Kathleen E. Hamilton, Tiffany M. Mintz, Prasanna Date, and Catherine D. Schuman
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- 2020
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29. Modeling epidemic spread with spike-based models.
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Kathleen E. Hamilton, Prasanna Date, Bill Kay, and Catherine D. Schuman
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- 2020
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30. Scalable quantum processor noise characterization.
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Kathleen E. Hamilton, Tyler Kharazi, Titus Morris, Alexander J. McCaskey, Ryan S. Bennink, and Raphael C. Pooser
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- 2020
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31. Patient-derived organoids as a platform for modeling a patient’s response to chemoradiotherapy in esophageal cancer
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Tatiana A. Karakasheva, Joel T. Gabre, Uma M. Sachdeva, Ricardo Cruz-Acuña, Eric W. Lin, Maureen DeMarshall, Gary W. Falk, Gregory G. Ginsberg, Zhaohai Yang, Michele M. Kim, Eric S. Diffenderfer, Jason R. Pitarresi, Jinyang Li, Amanda B. Muir, Kathryn E. Hamilton, Hiroshi Nakagawa, Adam J. Bass, and Anil K. Rustgi
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Medicine ,Science - Abstract
Abstract 3D patient-derived organoids (PDOs) have been utilized to evaluate potential therapies for patients with different cancers. However, the use of PDOs created from treatment-naive patient biopsies for prediction of clinical outcomes in patients with esophageal cancer has not yet been reported. Herein we describe a pilot prospective observational study with the goal of determining whether esophageal cancer PDOs created from treatment naive patients can model or predict clinical outcomes. Endoscopic biopsies of treatment-naive patients at a single tertiary care center were used to generate esophageal cancer PDOs, which were treated with standard-of-care chemotherapy, gamma-irradiation, and newer non-standard approaches, such as proton beam therapy or two small molecule inhibitors. Clinical outcomes of patients following neoadjuvant treatment were compared to their in vitro PDO responses, demonstrating the PDO’s ability to mirror clinical response, suggesting the value of PDOs in prediction of clinical response to new therapeutic approaches. Future prospective clinical trials should test the use of pre-treatment PDOs to identify specific, targeted therapies for individual patients with esophageal adenocarcinoma.
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- 2021
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32. Mangroves and coastal topography create economic 'safe havens' from tropical storms
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Jacob P. Hochard, Edward B. Barbier, and Stuart E. Hamilton
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Medicine ,Science - Abstract
Abstract Evidence suggests that mangroves protect economic activity in coastal areas. We estimate this protection from mangroves and coastal elevation globally, examining both “direct” and “indirect” exposure events (
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- 2021
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33. Mapping Phyllosilicates on the Asteroid Bennu Using Thermal Emission Spectra and Machine Learning Model Applications
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L B Breitenfeld, A D Rogers, T D Glotch, H H Kaplan, V E Hamilton, and P R Christensen
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Astrophysics - Abstract
Bennu, the target of the OSIRIS-REx mission, is an asteroid with compositions analogous to low petrologic type CI, CM, CR, and/or ungrouped carbonaceous chondrites. Asteroids like Bennu provide information about the building blocks of the early Solar System. Analysis of the mid-infrared remote sensing data informs mineral quantification. We apply a phyllosilicate specific model, developed by Breitenfeld et al. (2021) that distinguishes between Mg and Fe serpentines, to Baseball Diamond 1 (BBD1), Equatorial Station 3 (EQ3), and Touch-And-Go OSIRIS-REx Thermal Emission Spectrometer data. The average total phyllosilicate predictions are 73 (BBD1) and 72 vol% (EQ3). We observe higher Fe-cronstedtite and lower Mg-rich serpentine content in the equatorial region of Bennu than average. Mid-infrared spectral variability may be explained by sorting effects through mass movement.
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- 2022
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34. Radiologic imaging shows variable accuracy in diagnosing orbital inflammatory disease and assessing its activity
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Min Joung Lee, Bronwyn E. Hamilton, David Pettersson, Kimberly Ogle, Jennifer Murdock, Roger A. Dailey, John D. Ng, Eric A. Steele, Rohan Verma, Stephen R. Planck, Tammy M. Martin, Dongseok Choi, and James T. Rosenbaum
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Medicine ,Science - Abstract
Abstract Radiologic orbital imaging provides important information in the diagnosis and management of orbital inflammation. However, the diagnostic value of orbital imaging is not well elucidated. This study aimed to investigate the diagnostic accuracy of orbital imaging to diagnose orbital inflammatory diseases and its ability to detect active inflammation. We collected 75 scans of 52 patients (49 computed tomography (CT) scans; 26 magnetic resonance (MR) imaging scans). Clinical diagnoses included thyroid eye disease (TED) (41 scans, 31 patients), non-specific orbital inflammation (NSOI) (22 scans, 14 patients), sarcoidosis (4 scans, 3 patients), IgG4-related ophthalmic disease (IgG4-ROD) (5 scans, 3 patients), and granulomatosis with polyangiitis (GPA) (3 scans, 1 patient). Two experienced neuroradiologists interpreted the scans, offered a most likely diagnosis, and assessed the activity of inflammation, blinded to clinical findings. The accuracy rate of radiological diagnosis compared to each clinical diagnosis was evaluated. Sensitivity and specificity in detecting active inflammation were analyzed for TED and NSOI. The accuracy rate of radiologic diagnosis was 80.0% for IgG4-ROD, 77.3% for NSOI, and 73.2% for TED. Orbital imaging could not diagnose sarcoidosis. Orbital CT had a sensitivity of 50.0% and a specificity of 75.0% to predict active TED using clinical assessment as the gold standard. The sensitivity/specificity of orbital MR was 83.3/16.7% for the detection of active NSOI. In conclusion, orbital imaging is accurate for the diagnosis of IgG4, NSOI, and TED. Further studies with a large number of cases are needed to confirm this finding, especially with regard to uncommon diseases. Orbital CT showed moderate sensitivity and good specificity for identifying active TED.
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- 2020
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35. Potential Utility of Systemic Plasma Biomarkers for Evaluation of Pediatric Schistosomiasis in Western Kenya
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Bartholomew N. Ondigo, Rachael E. Hamilton, Edwin O. Magomere, Isaac O. Onkanga, Pauline N. Mwinzi, Maurice R. Odiere, and Lisa Ganley-Leal
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biomarkers ,schistosomiasis ,infection ,intensity ,diagnosis ,Immunologic diseases. Allergy ,RC581-607 - Abstract
IntroductionCurrent diagnostic tools for schistosomiasis are limited, and new tests are necessary to enhance disease diagnosis and surveillance. Identification of novel disease-specific biomarkers may facilitate the development of such tests. We evaluated a panel of biomarkers used in sepsis and parasitic diseases for their potential suitability in the diagnosis of schistosomiasis.ObjectiveThe study evaluated the levels of systemic plasma biomarkers in relation to Schistosoma mansoni infection and parasite burden.MethodsSix biomarkers were measured in the plasma of children from schistosomiasis-endemic regions using ELISA. The concentration of soluble CD23 (sCD23) and lipopolysaccharide (LPS) was tested in 199 and 124 plasma samples, respectively, while interleukin-6 (IL-6), soluble triggering receptor expressed on myeloid (sTREM) cells, eotaxin-1, and fatty acid-binding protein (FABP) concentrations were tested in 30 plasma samples.ResultsThe concentration of IL-6, eotaxin-1, FABP, and LPS was similar between schistosome-infected and uninfected children. The schistosome-infected children had higher median levels of sTREM and sCD23 as compared to uninfected children, 119.0 (29.9–208.9) versus 10.7 (0.0–73.4) (p = 0.046) and 2,549.0 (1,899.0–3,356.0) vs. 2,035.0 (1,448.0–2,939.0) (p = 0.05), respectively. In addition, sTREM was positively correlated with egg density (p = 0.017).ConclusionOur data show that active schistosomiasis per se is associated with elevated levels of sTREM and sCD23. sTREM has potential diagnostic and prognostic values. However, these biomarkers did not distinguish between children with low egg burden and uninfected children.
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- 2022
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36. A Non-Synonymous Point Mutation in a WD-40 Domain Repeat of EML5 Leads to Decreased Bovine Sperm Quality and Fertility
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Eriklis Nogueira, Filip Tirpák, Lauren E. Hamilton, Michal Zigo, Karl Kerns, Miriam Sutovsky, JaeWoo Kim, Dietrich Volkmann, Luca Jovine, Jeremy F. Taylor, Robert D. Schnabel, and Peter Sutovsky
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spermiogenesis ,fertilization ,acrosomal biogenesis ,spermatozoa ,SNP ,fertility ,Biology (General) ,QH301-705.5 - Abstract
This study is part of a concerted effort to identify and phenotype rare, deleterious mutations that adversely affect sperm quality, or convey high developmental and fertility potential to embryos and ensuing progeny. A rare, homozygous mutation in EML5 (EML5R1654W), which encodes a microtubule-associated protein with high expression in testis and brain was identified in an Angus bull used extensively in artificial insemination (AI) for its outstanding progeny production traits. The bull’s fertility was low in cross-breeding timed AI (TAI) (Pregnancy/TAI = 25.2%; n = 222) and, in general, AI breeding to Nellore cows (41%; n = 822). A search of the 1,000 Bull Genomes Run9 database revealed an additional 74 heterozygous animals and 8 homozygous animals harboring this exact mutation across several different breeds (0.7% frequency within the 6,191 sequenced animals). Phenotypically, spermatozoa from the homozygous Angus bull displayed prominent piriform and tapered heads, and outwardly protruding knobbed acrosomes. Additionally, an increased retention of EML5 was also observed in the sperm head of both homozygous and heterozygous Angus bulls compared to wild-type animals. This non-synonymous point mutation is located within a WD40 signaling domain repeat of EML5 and is predicted to be detrimental to overall protein function by genomic single nucleotide polymorphism (SNP) analysis and protein modeling. Future work will examine how this rare mutation affects field AI fertility and will characterize the role of EML5 in spermatogenesis.
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- 2022
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37. Linear Modeling of Spectra of Fine Particulate Materials: Implications for Compositional Analyses of Primitive Asteroids
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Vanessa C. Lowry, Kerri L. Donaldson Hanna, Humberto Campins, Neil Bowles, Victoria E. Hamilton, and Eloïse C. Brown
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Astronomy ,QB1-991 ,Geology ,QE1-996.5 - Abstract
Abstract In this study, we applied a sum to one constraint weighted least squares (STO WLS) model to thermal infrared (TIR) spectra of a suite of primitive asteroid analogs spectrally and volumetrically dominated by fine particulates (
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- 2022
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38. Observation of persistent species temperature separation in inertial confinement fusion mixtures
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Brian M. Haines, R. C. Shah, J. M. Smidt, B. J. Albright, T. Cardenas, M. R. Douglas, C. Forrest, V. Yu Glebov, M. A. Gunderson, C. E. Hamilton, K. C. Henderson, Y. Kim, M. N. Lee, T. J. Murphy, J. A. Oertel, R. E. Olson, B. M. Patterson, R. B. Randolph, and D. W. Schmidt
- Subjects
Science - Abstract
The influence of contaminants is one of the factors hindering self-sustained thermonuclear burn in inertial confinement fusion. Here, the authors present evidence, through simulations and experiments, that contaminants do not fully reach thermal equilibrium, and thus their amount is usually underestimated.
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- 2020
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39. Acquisition of murine splenic myeloid cells for protein and gene expression profiling by advanced flow cytometry and CITE-seq
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Inga Rødahl, James Gotley, Stacey B. Andersen, Meihua Yu, Ahmed M. Mehdi, Angelika N. Christ, Emma E. Hamilton-Williams, Ian H. Frazer, Samuel W. Lukowski, and Janin Chandra
- Subjects
Sequence analysis ,Cell isolation ,Single Cell ,Flow Cytometry/Mass Cytometry ,Health Sciences ,Sequencing ,Science (General) ,Q1-390 - Abstract
Summary: Here, we outline detailed protocols to isolate and profile murine splenic dendritic cells (DCs) through advanced flow cytometry of the myeloid compartment and single-cell transcriptomic profiling with integrated cell surface protein expression through CITE-seq. This protocol provides a general transferrable road map for different tissues and species.For complete details on the use and execution of this protocol, please refer to Lukowski et al. (2021).
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- 2021
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40. GRO 95577 (CR1) as a mineralogical analogue for asteroid (101955) Bennu
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Victoria E. Hamilton, Hannah H. Kaplan, Harold C. Connolly Jr, Cyrena A. Goodrich, Neyda M. Abreu, and Amy A. Simon
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Space Sciences (General) ,Chemistry And Materials (General) - Abstract
Orbital spectra of asteroid (101955) Bennu collected by NASA's Origins, Spectral Interpretation, Resource Identification, Security–Regolith Explorer (OSIRIS–REx) spacecraft have identified ungrouped C, CI, and CM meteorites having petrologic types 1, 1/2, and 2 as the best mineralogical analogues to Bennu to date. Here we present spectral evidence that Grosvenor Mountains (GRO) 95577, a CR1, is a better analogue for Bennu's bulk surface mineralogy. CR-like parent bodies are targets of interest because they contain some of the most pristine materials from the solar nebula and can contain substantial amounts of H2O and OH− in addition to exotic organics. Unfortunately, terrestrial weathering makes constraining their indigenous mineralogy and organics challenging. Analysis of samples retrieved directly from an asteroid would help us disentangle the effects of terrestrial weathering and asteroidal aqueous alteration and hence whether some of the exotic organics and large populations of presolar grains were affected by terrestrial processes in meteorites. If Bennu is comprised of CR1(−like) material, in whole or in part, the OSIRIS–REx returned sample represents a tremendous opportunity to explore in depth what is currently a unique material among carbonaceous chondrites.
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- 2022
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41. Assessing the Sampleability of Bennu’s Surface for the OSIRIS-REx Asteroid Sample Return Mission
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Kevin J. Walsh, Edward B Bierhaus, Dante S Lauretta, Michael C Nolan, Ronald-Louis Ballouz, Carina A. Bennett, Erica R. Jawin, Olivier S Barnouin, Kevin E Berry, Keara N. Burke, Bella Brodbeck, Rich Burns, Benton C Clark, Beth Ellen Clark Joseph, Saverio Cambioni, Harold C. Connolly, Michael G. Daly, Marco Delbo, Daniella DellaGiustina, Jason Peter Dworkin, Heather L Enos, Joshua P. Emery, Pamela Gay, Dathon R. Golish, Victoria E Hamilton, Rachel Hoover, Michael Lujan, Timothy Mccoy, Ronald G Mink, Michael C Moreau, Jennifer Nolau, Jacob Padilla, Maurizio Pajola, Anjani T Polit, Stuart J. Robbins, Andrew J. Ryan, Sanford H. Selznick, Stephanie Stewart, and Catherine W.V. Wolner
- Subjects
Astronomy ,Space Transportation And Safety - Abstract
NASA’s first asteroid sample return mission, OSIRIS-REx, collected a sample from the surface of near-Earth asteroid Bennu in October 2020 and will deliver it to Earth in September 2023. Selecting a sample collection site on Bennu’s surface was challenging due to the surprising lack of large ponded deposits of regolith particles exclusively fine enough (≤ 2 cm diameter) to be ingested by the spacecraft’s Touch-and-Go Sample Acquisition Mechanism (TAGSAM). Here we describe the Sampleability Map of Bennu, which was constructed to aid in the selection of candidate sampling sites and to estimate the probability of collecting sufficient sample. “Sampleability” is a numeric score that expresses the compatibility of a given area’s surface properties with the sampling mechanism. The algorithm that determines sampleability is a best fit functional form to an extensive suite of laboratory testing outcomes tracking the TAGSAM performance as a function of four observable properties of the target asteroid. The algorithm and testing were designed to measure and subsequently predict TAGSAM collection amounts as a function of the minimum particle size, maximum particle size, particle size frequency distribution, and the tilt of the TAGSAM head off the surface. The sampleability algorithm operated at two general scales, consistent with the resolution and coverage of data collected during the mission. The first scale was global and evaluated nearly the full surface. Due to Bennu’s unexpected boulder coverage and lack of ponded regolith deposits, the global sampleability efforts relied heavily on additional strategies to find and characterize regions of interest based on quantifying and avoiding areas heavily covered by material too large to be collected. The second scale was site-specific and used higher-resolution data to predict collected mass at a given contact location. The rigorous sampleability assessments gave the mission confidence to select the best possible sample collection site and directly enabled successful collection of hundreds of grams of material.
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- 2022
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42. Global geologic map of asteroid (101955) Bennu indicates heterogeneous resurfacing in the past 500,000 years
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E R Jawin, T J McCoy, K J Walsh, H C Connolly, R-L Ballouz, A J Ryan, H H Kaplan, M Pajola, V E Hamilton, O S Barnouin, J P Emery, B Rozitis, D N DellaGiustina, M G Daly, C A Bennett, D R Golish, M E Perry, R T Daly, E B Bierhaus, M C Nolan, H L Enos, and D S Lauretta
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Lunar And Planetary Science And Exploration ,Astronomy - Abstract
Global geologic maps are useful tools for efficient interpretation of a planetary body, and they provide global context for the diversity and evolution of the surface. We used data acquired by the OSIRIS-REx spacecraft to create the first global geologic map of the near-Earth asteroid (101955) Bennu. As this is the first geologic map of a small, non-spherical, rubble-pile asteroid, we discuss the distinctive mapping challenges and best practices that may be useful for future exploration of similar asteroids, such as those to be visited with the Hera and Janus missions. By mapping on two centimeter-scale global image mosaics (2D projected space) and a centimeter-scale global shape model (3D space), we generated three input maps respectively describing Bennu’s shape features, geologic features, and surface texture. Based on these input maps, we defined two geologic units: the Smooth Unit and the Rugged Unit. The units are differentiated primarily on the basis of surface texture, concentrations of boulders, and the distributions of lineaments, mass movement features, and craters. They are bounded by several scarps. The Rugged Unit contains abundant boulders and signs of recent mass movement. It also has fewer small(<20 m), putatively fresh craters than the Smooth Unit, suggesting that such craters have been erased in the former. Based on these geologic indicators, we infer that the Rugged Unit has the younger surface of the two. Differential crater size-frequency distributions and the distribution of the freshest craters suggest that both unit surfaces formed ~10–65 million years ago, when Bennu was located in the Main Asteroid Belt, and the Smooth Unit has not been significantly resurfaced in the past 2 million years. Meanwhile, the Rugged Unit has experienced resurfacing within the past ~500,000years during Bennu’s lifetime as a near-Earth asteroid. The geologic units are consistent with global diversity in slope, surface roughness, normal albedo, and thermal emission spectral characteristics. The site on Bennu where the OSIRIS-REx mission collected a regolith sample is located in the Smooth Unit, in a small crater nested within a larger one. So although the Smooth Unit is an older surface than the Rugged Unit, the impact-crater settingindicates that the material sampled was recently exposed. Several similarities are apparent between Bennu and asteroid (162173) Ryugu from a global geologic perspective, including two geologic units distinguishable by variations in the number density of boulders, as well as in other datasets such as brightness.
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- 2022
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43. Outcomes after perioperative SARS-CoV-2 infection in patients with proximal femoral fractures: an international cohort study
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T Richards, S Shaikh, S Rehman, A Khan, J Shah, C Smith, A Brown, S Singh, A P Arnaud, A Young, D Bowen, P Patel, S Williams, J Dunn, J John, M Loubani, A Hainsworth, A Kolias, PJ Hutchinson, R Singh, S Sinha, S Shaw, J Edwards, S Mukherjee, AAB Jamjoom, A Singh, S Saeed, J Martin, S Smith, S Ross, M Mohan, P Hutchinson, G James, RDC Moon, P Brennan, A Williams, S Brown, A Ward, M Lee, K Thompson, S Ali, J Williams, S Reid, U Khan, J Lambert, A Smith, B Singh, M Hassan, N Sharma, J Reynolds, N Wright, T Williams, H Smith, M Ng, M Rahman, A Taylor, P Shah, D Saxena, J Evans, I Omar, M Ali, A Hanson, Z Li, R Andrade, P Cardoso, H Jeong, P Sharma, M Arrieta, J Clark, L Pearce, J McVeigh, V Sharma, B Kim, J Singh, S Newman, J Byrne, A Hassan, A Persad, A Gardner, H Liu, K Shah, I Hughes, S Davison, A Balakrishnan, K Patel, J Hall, S Mistry, J Parry, R Baumber, N McGrath, E Ross, R Mannion, S Murphy, FL Wright, A Rogers, B Rai, M Thomas, R Ribeiro, E Hamilton, J Teixeira, B Davidson, L Carvalho, R Garrido, A Puppo, A Guimarães, E Santos, M Kamal, M Denning, M Elhadi, J E Fitzgerald, D Miller, M Gowda, C Morris, A Phillips, H Yang, Y Zhang, N Machairas, A Fisher, A Kaufmann, A Aggarwal, L Hansen, M Otify, H Soleymani Majd, A Jones, M Rodrigues, S Sundar, C Jones, R Edmondson, A Sharkey, L Smith, G Williams, J Dunning, E Belcher, D Stavroulias, V Zamvar, M Patel, M Baker, R Evans, M Sherif, J Hopkins, R Mohammed, A Hill, H Jackson, G Jones, K George, J Dixon, A Tong, S Jallad, Deborah S Keller, A Pereira, L Elliott, D Ford, A Sermon, M Almond, Andrew Metcalfe, C Peluso, T White, S Shah, A Witek, Chetan Khatri, A Tiwari, T Lo, K Agarwal, C Sweeney, C Hart, T Holme, S Green, I Ahmed, A Sobti, C Anderson, N Modi, R Campbell, C Magee, M Mirza, D Jones, N Stylianides, X Luo, C Kang, J Ribeiro, L Kumar, J Diaz, A Bhalla, R Young, C Perkins, A James, A Walters, J Reid, R Pereira, C McDonald, A Aujayeb, K Jackson, M Allen, D Ghosh, M Chan, C Price, K Khan, R Moore, M Ibrahim, A Marchbank, M Silva, M Baig, J De Coster, J Castellanos, S Saxena, M Duque, E Li, E Martin, A Isik, J González, RJ Davies, B Smith, R Owen, K Lakhoo, M Rogers, MA Akhtar, K Mellor, S Agrawal, L Foster, G Harris, J McIntyre, M Garner, R West, R Cuthbert, D Johnson, H Gomes, C Roy, N Spencer, D Mehta, J Freedman, J Blair, K Rajput, K Williams, J Wall, A Soliman, F Chen, A Mokhtari, I Mohamed, J Pascoe, M Khalifa, R Das, A Lara, M Costa, A Mahmoud, K Roberts, J Lane, S Robertson, J P Evans, E Krishnan, I Haq, S Rogers, J Knowles, M Chowdhury, A Ghanbari, L Macdonald, S Powell, J Hunt, J Cornish, J Engel, S Page, I Blake, A Rolls, H Ross, D Simpson, J Hammond, A Goyal, K Parkins, A Desai, A Gaunt, A Salim, Y Yousef, A Schache, H Mohan, SR Brown, R Nair, M Flatman, J Lord, RJ Egan, R Harries, N Judkins, K Sugand, T Hine, J Luck, C Johnson, G Salerno, AW Phillips, R Houston, A Volpe, C Walker, C Steele, M Rela, C Barry, R Alves, L Ramsay, A Turnbull, A Daniele, C S Jones, P Gallagher, G Gradinariu, A Oliveira, C Hardie, H Ferguson, S Bhattacharya, E Davies, P Joshi, C Mellor, E Griffiths, A Bhangu, R Mahoney, F Kashora, G Ruiz, K Wong, G Hill, V Testa, S Ford, C Park, P Gomez, C Lopes, A Lázaro, A Shabana, A Agarwal, C Chung, C Politis, G Martin, E Chung, M Ismail, C Cunha, S Correia, I Santos, A Tang, A Robson, T Collier, G Baltazar, M Quintana, C English, M Ip, K Newton, J Kahn, C Tan, D Cheng, R Woods, M Ho, A ABBAS, A Henry, F Rivas, M Mohammed, N Parsons, T Board, S Madan, A Osorio, M Jarvis, M Hashem, A Egglestone, E Halliday, A Ridgway, G Gallo, J Gilliland, W Marx, R Shaw, A Mahmood, K Gohil, B Gallagher, D Alderson, A Karim, G D Stewart, G Peck, L Majkowski, J Carter, H Ishii, L HUMPHREYS, J Khan, S Abbott, C Newton, F Borghi, A Sud, K Bhatia, H Cao, V Vijay, L Sanderson, E Holler, N Hanna, D Ferguson, P Miranda, L Pickering, T Singhal, T Newman, K Ghosh, C Camacho, D Manning, C Lipede, R Clifford, S Higgs, C Menakaya, S Shankar, K Booth, M Abdalla, T Nelson, 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Giraudo, E Gelarda, E Dalmasso, A Abrate, V Ciriello, F Rosato, A Garnero, L Leotta, M Chiozza, G Anania, A Urbani, M Koleva Radica, P Carcoforo, M Portinari, M Sibilla, JE Archer, A Odeh, N Siddaiah, H Carmichael, CG Velopulos, RC McIntyre, TJ Schroeppel, EA Hennessy, L Zier, C Parmar, JM Muñoz Vives, CJ Gómez Díaz, CA Guariglia, C Soto Montesinos, L Sanchon, M Xicola Martínez, N Guàrdia, P Collera, R Diaz Del Gobbo, R Sanchez Jimenez, R Farre Font, R Flores Clotet, CEM Brathwaite, H Hakmi, AH Sohail, R Heckburn, D Townshend, N McLarty, A Shenfine, K Madhvani, M Hampton, AP Hormis, V Miu, K Sheridan, C Luney, MA Williams, A Alqallaf, A Ben-Sassi, R Crichton, J Sonksen, GR Layton, B Karki, S Pankhania, S Asher, A Folorunso, J Winyard, J Mangwani, BHB Babu, C Weerasinghe, M Ballabio, P Bisagni, T Armao, M Madonini, A Gagliano, P Pizzini, A Älgå, M Nordberg, G Sandblom, J El Kafsi, K Logishetty, A Saadya, R Midha, H Subbiah Ponniah, T Stockdale, T Bacarese-Hamilton, N Anjarwalla, D Marujo Henriques, R Hettige, C Baban, A Tenovici, F Anazor, SD King, S Kazzaz, S HKruijff, De Vries JPPM, PJ Steinkamp, PKC Jonker, WY Van der Plas, W Bierman, Y Janssen, ABJ Borgstein, D Enjuto, M Perez Gonzalez, P Díaz Peña, M Marqueta De Salas, P Martinez Pascual, L Rodríguez Gómez, R Garcés García, A Ramos Bonilla, N Herrera-Merino, P Fernández Bernabé, EP Cagigal Ortega, García de Castro Rubio E, I Cervera, MH Siddique, C Barmpagianni, A Basgaran, A Basha, V Okechukwu, A Bartsch, CA Leo, HK Ubhi, N Zafar, H Abdul-Jabar, F Mongelli, M Bernasconi, M Di Giuseppe, D Christoforidis, D La Regina, M Arigoni, A Al-Sukaini, S Mediratta, O Brown, M Boal, S Stanger, H Abdalaziz, J Constable, G Dovell, R Gopi reddy, A Dehal, HB Shah, GWV Cross, P Seyed-Safi, YW Smart, A Kuc, M Al-Yaseen, B Jayasankar, D Balasubramaniam, K Abdelsaid, N Mundkur, RE Soulsby, O Ryska, T Raymond, P Hawkin, G Kinnaman, I Sharma, K Freystaetter, JN Hadfield, A Hilley, S Arkani, M Youssef, I Shaikh, K Seebah, V 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P Martin Playa, A Gainza, EJ Aragon Achig, A Rodriguez Fraga, Melchor Corcóstegui, G Mallabiabarrena Ormaechea, JJ Garcia Gutierrez, L Barbier, MA Pesántez Peralta, M Jiménez Jiménez, JA Municio Martín, J Gómez Suárez, G García Operé, LA Pascua Gómez, M Oñate Aguirre, A Fernandez-Colorado, M De la Rosa-Estadella, A Gasulla-Rodriguez, M Serrano-Martin, A Peig-Font, S Junca-Marti, M Juarez-Pomes, S Garrido-Ondono, L Blasco-Torres, M Molina-Corbacho, Y Maldonado-Sotoca, A Gasset-Teixidor, J Blasco-Moreu, V Turrado-Rodriguez, AM Lacy, FB de Lacy, X Morales, A Carreras-Castañer, P Torner, M Jornet-Gibert, M Balaguer-Castro, M Renau-Cerrillo, P Camacho-Carrasco, M Vives-Barquiel, B Campuzano-Bitterling, I Gracia, R Pujol-Muncunill, M Estaire Gómez, D Padilla-Valverde, S Sánchez-García, D Sanchez-Pelaez, E Jimenez Higuera, R Picón Rodríguez, Fernández Camuñas À, C Martínez-Pinedo, EP Garcia Santos, V Muñoz-Atienza, A Moreno Pérez, CA Cano, D Crego-Vita, M Huecas-Martinez, A Roselló Añón, MJ Sangüesa, JC Bernal-Sprekelsen, JC Catalá Bauset, P Renovell Ferrer, C Martínez Pérez, O Gil-Albarova, J Gilabert Estellés, K Aghababyan, R Rivas, J Escartin, JL Blas Laina, B Cros, Talal El-Abur, J Garcia Egea, C Yanez, JH Kauppila, E Sarjanoja, S Tzedakis, PA Bouche, S Gaujoux, D Gossot, A Seguin-Givelet, D Fuks, M Grigoroiu, R Sanchez Salas, X Cathelineau, P Macek, Y Barbé, F Rozet, E Barret, A Mombet, N Cathala, E Brian, F Zadegan, AJ Baldwin, E Gammeri, A Catton, S Marinos Kouris, J Pereca, M Kaushal, A Kler, V Reghuram, S Tezas, V Oktseloglou, F Mosley, MFI De La Cruz Monroy, P Bobak, S Ahad, E Lostis, GK Ambler, J Manara, M Doe, T Jichi, GD Stewart, J Ramzi, AA Singh, J Ashcroft, OJ Baker, P Coughlin, Durst AZED, A Abood, A Habeeb, VE Hudson, B Lamb, L Luke, S Mitrasinovic, Ngu AWT, S Waseem, F Georgiades, XS Tan, J Pushpa-rajah, I Abu-Nayla, S Rooney, E Irune, MHV Byrne, A Durrani, A Sethuraman Venkatesan, T Combellack, G Tahhan, M Kornaszewska, V Valtzoglou, I Deglurkar, M Koutentakis, Syed Nong Chek SAH, M Shinkwin, F Ayeni, H Tustin, M Bordenave, N Manu, N Eardley, OL Serevina, S Roy Mahapatra, K Mohankumar, I Khawaja, A Palepa, T Doulias, Y Premakumar, Y Jauhari, Z Koshnow, A Uberai, F Hirri, BM Stubbs, J Manickavasagam, S Dalgleish, R Kanitkar, CJ Payne, Ng CE, DE Henshall, T Drake, EM Harrison, A Tambyraja, RJE Skipworth, G Linder, R McGregor, J Mayes, R Pasricha, A Razik, S Thrumurthy, D Howden, Z Baxter, L Osagie, M Bence, GE Fowler, N Rajaretnam, A Goubran, JS McGrath, JRA Phillips, DA Raptis, JM Pollok, F Soggiu, S Xyda, C Hidalgo Salinas, H Tzerbinis, T Pissanou, R Mirnezami, N Angamuthu, T Shakir, H Capitelli-McMahon, L Hitchman, A Andronic, A Aboelkassem Ibrahim, J Totty, S Tayeh, T Chase, J Ayorinde, T Cuming, A Trompeter, C Hing, P Tsinaslanidis, MW Benjamin, A Leyte, J Smelt, G Santhirakumaran, A Labib, O Lyons, S Onida, KM Sarraf, S Erridge, S Yalamanchili, A Abuown, D Davenport, S Wheatstone, SM Andreani, MF Bath, A Sahni, L Rigueros Springford, C Sohrabi, J Bacarese-Hamilton, FG Taylor, P Patki, C Tanabalan, ME Alexander, CJ Smart, L Abdeh, M Zeiton, R Advani, S Nikolaou, T Oni, N Ilahi, K Ballantyne, Z Woodward, R Merh, B Robertson-Smith, P Ameerally, JG Finch, C Gnanachandran, I Pop, D Dass, G Thiruchandran, Toh SKC, A Allana, C Bellis, O Babawale, YC Phan, U Lokman, T Koc, L Duggleby, S Shamoon, H Clancy, A Mansuri, A Thakrar, L Wickramarachchi, S Sivayoganathan, E Karam, HV Colvin, A Badran, A Cadersa, A Cumpstey, R Aftab, F Wensley, V Morrison-Jones, GK Sekhon, H Shields, Z Shakoor, T Talbot, A Alzetani, J Rooney, M Rudic, A Aladeojebi, M Kitchen, R Lefroy, P Nanjaiah, AD Rajgor, RJ Scurrah, LJ Watson, T Royle, B Steel, Luk ACO, VG Thiruvasagam, W Marlow, C Konstantinou, D Yershov, A Denning, E Mangos, T Nambirajan, I Flindall, V Mahendran, J De Marchi, NF Davis, A Picciariello, V Papagni, DF Altomare, S Granieri, C Cotsoglou, A Cabeleira, P Serralheiro, T Teles, C Canhoto, J Simões, AC Almeida, O Nogueira, R Athayde Nemésio, MJ Amaral, A Valente da Costa, R Martins, P Guerreiro, A Ruivo, D Breda, JM Oliveira, AL De Oliveira Lopez, M Colino, J De Barros, AP Soares, H Morais, T Revez, MI Manso, JC Domingues, P Henriques, Cardoso N Ribeiro VI, G Martins dos Santos, M Peralta Ferreira, J Ascensão, B Costeira, L Rio Rodrigues, M Sousa Fernandes, P Azevedo, I Lourenço, G Mendinhos, A Nobre Pinto, H Taflin, H Abdou, L O'Meara, Z Cooper, SA Hirji, BU Okafor, V Roxo, CP Raut, JS Jolissaint, DA Mahvi, C Reinke, S Merola, A Ssentongo, P Ssentongo, Oh JS, J Hazelton, J Maines, N Gusani, RCG Martin, N Bhutiani, R Choron, F Soliman, MD E Dauer, E Renza-Stingone, E Gokcen, E Kropf, H Sufrin, J Sewards, J Poggio, K Sanserino, L Rae, M Philp, M Metro, P McNelis, R Petrov, T Pazionis, DB Lumenta, SP Nischwitz, E Richtig, M Pau, P Srekl-Filzmaier, N Eibinger, B Michelitsch, M Fediuk, A Papinutti, TU Cohnert, E Kantor, J Kahiu, S Hosny, A Sultana, M Taggarsi, L Vitone, OP Vaz, I Sarantitis, S Timbrell, A Shugaba, GP Jones, SS Tripathi, MS Greenhalgh, H Emerson, K Vejsbjerg, W McCormick, K Singisetti, Y Aawsaj, R Vanker, M Ghobrial, S Kanthasamy, H Fawi, M Awadallah, J Cheung, S Tingle, F Abbadessa, A Sachdeva, CD Chan, I McPherson, F Mahmoud Ali, S Pandanaboyana, T Grainger, S Nandhra, N Dawe, C McCaffer, J Riches, J Moir, H Elamin Ahmed, C Saleh, RM Koshy, LJ Rogers, PL Labib, N Hope, K Emslie, P Panahi, E Clough, I Enemosah, J Natale, N Raza, JI Webb, M Antar, J Noel, R Nunn, F Eriberto, R Tanna, S Lodhia, C Osório, J Antunes, P Balau, and M Godinho
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Medicine - Abstract
Objectives Studies have demonstrated high rates of mortality in people with proximal femoral fracture and SARS-CoV-2, but there is limited published data on the factors that influence mortality for clinicians to make informed treatment decisions. This study aims to report the 30-day mortality associated with perioperative infection of patients undergoing surgery for proximal femoral fractures and to examine the factors that influence mortality in a multivariate analysis.Setting Prospective, international, multicentre, observational cohort study.Participants Patients undergoing any operation for a proximal femoral fracture from 1 February to 30 April 2020 and with perioperative SARS-CoV-2 infection (either 7 days prior or 30-day postoperative).Primary outcome 30-day mortality. Multivariate modelling was performed to identify factors associated with 30-day mortality.Results This study reports included 1063 patients from 174 hospitals in 19 countries. Overall 30-day mortality was 29.4% (313/1063). In an adjusted model, 30-day mortality was associated with male gender (OR 2.29, 95% CI 1.68 to 3.13, p80 years (OR 1.60, 95% CI 1.1 to 2.31, p=0.013), preoperative diagnosis of dementia (OR 1.57, 95% CI 1.15 to 2.16, p=0.005), kidney disease (OR 1.73, 95% CI 1.18 to 2.55, p=0.005) and congestive heart failure (OR 1.62, 95% CI 1.06 to 2.48, p=0.025). Mortality at 30 days was lower in patients with a preoperative diagnosis of SARS-CoV-2 (OR 0.6, 95% CI 0.6 (0.42 to 0.85), p=0.004). There was no difference in mortality in patients with an increase to delay in surgery (p=0.220) or type of anaesthetic given (p=0.787).Conclusions Patients undergoing surgery for a proximal femoral fracture with a perioperative infection of SARS-CoV-2 have a high rate of mortality. This study would support the need for providing these patients with individualised medical and anaesthetic care, including medical optimisation before theatre. Careful preoperative counselling is needed for those with a proximal femoral fracture and SARS-CoV-2, especially those in the highest risk groups.Trial registration number NCT04323644
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- 2021
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44. Neural Networks and Graph Algorithms with Next-Generation Processors.
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Kathleen E. Hamilton, Catherine D. Schuman, Steven R. Young, Neena Imam, and Travis S. Humble
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- 2018
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45. The complete mitochondrial genome of the plumed worm Diopatra cuprea (Annelida: Onuphidae)
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Lauren E. Hamilton, Gabriel C. Preston, Jade B. Wheeler, Alexis M. Janosik, and Viktoria E. Bogantes
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mtdna ,gulf of mexico ,phylogenetics ,evolution ,Genetics ,QH426-470 - Abstract
In this study, we describe the complete mitochondrial genome of Diopatra cuprea (Bosc, 1802). The mitogenome was found to contain 14,990 base pairs (67.53% A + T content), with a total of 37 genes (13 protein coding, 22 transfer RNAs, and 2 ribosomal RNAs). This study also examined mitogenome phylogenetics relationships of closely related species and recovered that D. cuprea is closely related to eunicids. This work has added to the genetic resources for furthering evolutionary studies of Annelida.
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- 2022
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46. The missing voice of engagement: an exploratory study from the perspectives of case-managers at an early intervention service for first-episode psychosis
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Rachel M. Tindall, Kelly Allott, Magenta Simmons, Winsome Roberts, and Bridget E. Hamilton
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First episode psychosis ,Qualitative research ,Service engagement ,Case-management ,Psychiatry ,RC435-571 - Abstract
Abstract Background A key component of case-management in early intervention services for first-episode psychosis is engaging a person with the service and building a relationship from which therapy and treatment can be facilitated. The aim of this study was to understand how case-managers at an early intervention service experience the process of engagement and working with varying levels of attendance and participation. Methods Qualitative interviews were conducted with the case-managers of nine young people treated at an early intervention service for first-episode psychosis within 6 months of treatment entry. Interviews discussed the process of working with the young person and factors that influenced service engagement. Interviews were analyzed using thematic analysis. Results Case-managers described a range of influences on engagement which were grouped under the themes: young person and caregiver influences on engagement, case-manager influences on engagement, and influences of the early intervention service system on engagement. The experience of engagement was described as relational, however it occurred in the context of broader influences, some of which were unable to be changed or challenged by the case-manager (e.g., resource allocation, models of treatment, young person demographics). Conclusion This study illustrates the challenges that case-managers face when working with young people with first-episode psychosis, and the direct influence this has on engagement with treatment. Understanding these challenges and addressing them in policy and service design may lead to improvements in young peoples’ recovery from first-episode psychosis and increase case-manager job satisfaction.
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- 2019
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47. Contributions of natural killer cells to the immune response against Plasmodium
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Kristina S. Burrack, Geoffrey T. Hart, and Sara E. Hamilton
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Malaria ,NK cells ,Cytotoxicity ,Cytokines ,Arctic medicine. Tropical medicine ,RC955-962 ,Infectious and parasitic diseases ,RC109-216 - Abstract
Abstract Natural killer (NK) cells are important innate effector cells that are well described in their ability to kill virally-infected cells and tumors. However, there is increasing appreciation for the role of NK cells in the control of other pathogens, including intracellular parasites such as Plasmodium, the cause of malaria. NK cells may be beneficial during the early phase of Plasmodium infection—prior to the activation and expansion of antigen-specific T cells—through cooperation with myeloid cells to produce inflammatory cytokines like IFNγ. Recent work has defined how Plasmodium can activate NK cells to respond with natural cytotoxicity, and inhibit the growth of parasites via antibody-dependent cellular cytotoxicity mechanisms (ADCC). A specialized subset of adaptive NK cells that are negative for the Fc receptor γ chain have enhanced ADCC function and correlate with protection from malaria. Additionally, production of the regulatory cytokine IL-10 by NK cells prevents overt pathology and death during experimental cerebral malaria. Now that conditional NK cell mouse models have been developed, previous studies need to be reevaluated in the context of what is now known about other immune populations with similarity to NK cells (i.e., NKT cells and type I innate lymphoid cells). This brief review summarizes recent findings which support the potentially beneficial roles of NK cells during Plasmodium infection in mice and humans. Also highlighted are how the actions of NK cells can be explored using new experimental strategies, and the potential to harness NK cell function in vaccination regimens.
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- 2019
- Full Text
- View/download PDF
48. ggtern: Ternary Diagrams Using ggplot2
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Nicholas E. Hamilton and Michael Ferry
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plotting software ,ternary diagrams ,ggplot2 ,Statistics ,HA1-4737 - Abstract
This paper presents the ggtern package for R, which has been developed for the rendering of ternary diagrams. Based on the well-established ggplot2 package (Wickham 2009), the present package adopts the familiar and convenient programming syntax of its parent. We demonstrate that ggplot2 can be used as the basis for producing specialized plotting packages and, in the present case, a package has been developed specifically for the production of high quality ternary diagrams. In order to produce ggtern, it was necessary to overcome a number of design issues, such as finding a means to modify existing geometries designed for a 2D Cartesian coordinate system and permitting them to function in an environment that requires an additional spatial aesthetic mapping. In the present paper, we provide examples of this package in its most basic form followed by a demonstration of its ease of use, particularly if one is familiar with, and has a predilection towards using ggplot2 on a regular basis.
- Published
- 2018
- Full Text
- View/download PDF
49. The use of open source GIS algorithms, big geographic data, and cluster computing techniques to compile a geospatial database that can be used to evaluate upstream bathing and sanitation behaviours on downstream health outcomes in Indonesia, 2000–2008
- Author
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Stuart E. Hamilton, John Talbot, and Carl Flint
- Subjects
Computer applications to medicine. Medical informatics ,R858-859.7 - Abstract
Abstract Background Waterborne diseases are one of the leading causes of mortality in developing countries, and diarrhea alone is responsible for over 1.5 million deaths annually. Such waterborne illnesses most often affect those in impoverished rural communities who rely on rivers for their supply of drinking water. Deaths are most common among infants and the elderly. Without knowledge of which communities are upstream of a community, upstream sanitary and bathing behaviors can never be directly linked to downstream health outcomes including disease outbreaks. Although current GIS technologies can answer the upstream question for a limited number of downstream communities, no systematic way existed of labeling each downstream village with all its upstream contributing villages along river networks or within basins at the large national scale, such as in Indonesia. This limitation prohibits macro analyses of waterborne illness across developing world communities globally. Results This novel method approach combines parallel computing, big data, community data, and open source GIS to create a database of upstream communities for 50,000–70,0000 villages in Indonesia across four differing periods. The resultant village database provides information that can be tied to the Indonesian PODES health and behavior surveys in each village to connect upstream sanitary behaviors to downstream health outcomes. We find that the approximately 250,000 communities analyzed across the four periods in Indonesia have a combined total of 13.7 million upstream villages. The average number of upstream villages per village was almost 55, the maximum number of upstream villages for any single village was over 5300. Conclusions Advances in big-data availability, particularly high-resolution elevation data, the lowering of the cost of parallel computing options, mass survey data, and open source GIS algorithms that can utilize parallel processing and big-data, open new opportunities for the study of human health at micro granularities but across entire nations. The database generated has already been used by health researchers to compute the influence of upstream behaviors on downstream diarrhea outbreaks and to monitor avoidance behaviors to upstream water behaviors across all downstream 250,000 Indonesian villages over 4 years, and further waterborne health analyses are underway.
- Published
- 2018
- Full Text
- View/download PDF
50. Intestinal epithelial autophagy is required for the regenerative benefit of calorie restriction
- Author
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Patrick A. Williams, Kaitlyn E. Naughton, Lauren A. Simon, Gloria E. Soto, Louis R. Parham, Xianghui Ma, Charles H. Danan, Weiming Hu, Elliot S. Friedman, Emily A. McMillan, Hritik Mehta, Madison A. Stoltz, Joshua Soto Ocaña, Joseph P. Zackular, Kyle Bittinger, Kelly A. Whelan, Tatiana A. Karakasheva, and Kathryn E. Hamilton
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Hepatology ,Physiology ,Physiology (medical) ,Gastroenterology - Abstract
Calorie restriction is associated with enhanced intestinal regeneration after irradiation, but the requirement of autophagy for this process is not known. Our data support the premise that intestinal epithelial autophagy is required for the regenerative benefit of calorie restriction. We also report that luminal levels of primary bile acid glycocholic acid are modulated by epithelial cell autophagy during calorie restriction with direct effects on epithelial stem cell function.
- Published
- 2023
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