Medicine and Health Sciences Commons^™

System Dynamics To Investigate Opioid Use And Chiropractic Care For Chronic Musculoskeletal Pain, Marion Mcgregor, Alexandra Nielsen, Chadwick Chung, Mark Fillery, Wayne Wakeland, Silvano Mior

Systems Science Faculty Publications and Presentations

Objective: The purpose of this investigation was to create a system dynamics (SD) model, including published data and required assumptions, as a tool for future research identifying the role of chiropractic care in the management of chronic, nonmalignant pain in a Canadian population. Methods: We present an illustrative case description of how we evaluated the feasibility of conducting a large-scale clinical trial to assess the impact of chiropractic care in mitigating excessive opioid use in Canada. We applied SD modeling using current evidence and key assumptions where such evidence was lacking. Modeling outcomes were highlighted to determine which potential …

4-D Computational Modeling Of Cardiac Outflow Tract Hemodynamics Over Looping Developmental Stages In Chicken Embryos, Katherine Courchaine, Mackenzie J. Gray, Kaitlin Beel, Kent L. Thornburg, Sandra Rugonyi

OHSU-PSU School of Public Health Faculty Publications and Presentations

Cardiogenesis is interdependent with blood flow within the embryonic system. Recently, a number of studies have begun to elucidate the effects of hemodynamic forces acting upon and within cells as the cardiovascular system begins to develop. Changes in flow are picked up by mechanosensors in endocardial cells exposed to wall shear stress (the tangential force exerted by blood flow) and by myocardial and mesenchymal cells exposed to cyclic strain (deformation). Mechanosensors stimulate a variety of mechanotransduction pathways which elicit functional cellular responses in order to coordinate the structural development of the heart and cardiovascular system. The looping stages of heart …

Targeting Mitochondria In Cancer Therapy Could Provide A Basis For The Selective Anticancer Activity, Dmitri Rozanov, Anton Cheltsov, Aaron Nilsen, Christopher Boniface, Isaac Forquer, James Korkola, Joe Gray, Multiple Additional Authors

Chemistry Faculty Publications and Presentations

To determine the target of the recently identified lead compound NSC130362 that is responsible for its selective anti-cancer efficacy and safety in normal cells, structure-activity relationship (SAR) studies were conducted. First, NSC13062 was validated as a starting compound for the described SAR studies in a variety of cell-based viability assays. Then, a small library of 1,4-naphthoquinines (1,4-NQs) and quinoline-5,8-diones was tested in cell viability assays using pancreatic cancer MIA PaCa-2 cells and normal human hepatocytes. The obtained data allowed us to select a set of both non-toxic compounds that preferentially induced apoptosis in cancer cells and toxic compounds that induced …

A Systems Thinking Approach For Eliciting Mental Models From Visual Boundary Objects In Hydropolitical Contexts: A Case Study From The Pilcomayo River Basin, Riveraine S. Walters, Erin S. Kenzie, Alexander E. Metzger, William Jesse Baltutis, Kakali B. Chakrabarti, Shana Lee Hirsch, Bethany Laursen

Systems Science Faculty Publications and Presentations

Transboundary collaborations related to international freshwater are critical for ensuring equitable, efficient, and sustainable shared access to our planet’s most fundamental resources. Visual artifacts, such as knowledge maps, functioning as boundary objects, are used in hydropolitical contexts to convey understandings and facilitate discussion across scales about challenges and opportunities from multiple perspectives. Such focal points for discussion are valuable in creating shared, socially negotiated priorities and integrating diverse and often disparate cultural perspectives that naturally exist in the context of international transboundary water resources. Visual boundary objects can also represent the collective mental models of the actor countries and transboundary …

Protocol For A Longitudinal Study To Evaluate The Use Of Tenofovir-Based Prep For Safer Conception And Pregnancy Among Women In South Africa, Lynn T. Matthews, Manjeetha Jaggernath, Yolandie Kriel, Patricia Smith, Kasey O’Neil, David Bangsberg, Multiple Additional Authors

OHSU-PSU School of Public Health Faculty Publications and Presentations

Introduction Women who choose to conceive a baby with a partner living with HIV or a partner whose HIV serostatus is unknown in HIV-endemic settings need prevention strategies to mitigate HIV acquisition during conception and pregnancy.

Methods and analysis We are conducting a single-arm longitudinal study offering oral tenofovirdisoproxil fumarate/emtricitabine (TDF/FTC) as pre-exposure prophylaxis (PrEP) for periconception use to 350 HIV-uninfected women in KwaZulu-Natal, South Africa. PrEP is offered as part of woman-centred safer conception programme that promotes couples-based HIV counselling and testing, antiretroviral therapy for partners who are HIV-infected, treatment for sexually transmitted infections and safer conception strategies, such …

Digital Monitoring Technologies Could Enhance Tuberculosis Medication Adherence In Uganda: Mixed Methods Study, Angella Musiimenta, Wilson Tumuhimbise, Aaron T. Mugaba, Conrad Muzoora, Mari Armstrong-Hough, David Bangsberg, J. Lucian Davis, Jessica E. Haberer

OHSU-PSU School of Public Health Faculty Publications and Presentations

Background: Effective administration of tuberculosis therapy remains challenging. The recommended strategy of direct observed therapy is challenging and its implementation has been limited in many settings. Digital adherence technologies could be promising patient-centered strategies for monitoring adherence. However, few quality studies have assessed patients’ experiences with these technologies. Objective: To explore TB patients’ perceptions of a digital adherence intervention composed of a digital adherence monitor and SMS texts. Methods: We purposively sampled TB patients who owned phones, had been taking TB medication for at least a month, and were receiving their treatment from Mbarara Regional Referral Hospital. We interviewed 35 …

Deep Learning Based Topology Guaranteed Surface And Mme Segmentation Of Multiple Sclerosis Subjects From Retinal Oct, Yufan He, Aaron Carass, Yihao Liu, Bruno Jedynak, Sharon D. Solomon, Shiv Saidha, Peter A. Calabresi, Jerry L. Prince

Mathematics and Statistics Faculty Publications and Presentations

Optical coherence tomography (OCT) is a noninvasive imaging modality that can be used to obtain depth images of the retina. Patients with multiple sclerosis (MS) have thinning retinal nerve fiber and ganglion cell layers, and approximately 5% of MS patients will develop microcystic macular edema (MME) within the retina. Segmentation of both the retinal layers and MME can provide important information to help monitor MS progression. Graph-based segmentation with machine learning preprocessing is the leading method for retinal layer segmentation, providing accurate surface delineations with the correct topological ordering. However, graph methods are time-consuming and they do not optimally incorporate …

Words Matter: Putting An End To “Unsafe” And “Risky” Sex, Julia L. Marcus, Jonathan Snowden

OHSU-PSU School of Public Health Faculty Publications and Presentations

Change is constant in sexual health, as in health care more broadly. Novel pathogens are identified, epidemics emerge and reemerge, and new preventive and therapeutic agents are introduced and taken up by populations. On the other hand, some care strategies and practices fall by the wayside among clinicians and populations. Just as health and health care evolve, so too should the language that we use to describe them.

In this commentary, we express our concerns about the use of ambiguous and stigmatizing language when describing sexual behavior. A search on PubMed in September 2019 yielded over four thousand articles with …

Female Sex And Cardiovascular Disease Risk In Rural Uganda: A Cross-Sectional, Population-Based Study, Itai M. Magodoro, Maggie Feng, Crystal North, Dagmar Vořechovská, John D. Kraemer, Bernard Kakuhikire, David Bangsberg, Alexander C. Tsai, Mark J. Siedner

OHSU-PSU School of Public Health Faculty Publications and Presentations

Background:

Sex-based differences in cardiovascular disease (CVD) burden are widely acknowledged, with male sex considered a risk factor in high-income settings. However, these relationships have not been examined in sub- Saharan Africa (SSA). We aimed to apply the American Heart Association (AHA) ideal cardiovascular health (CVH) tool modified by the addition of C-reactive protein (CRP) to examine potential sex-based differences in the prevalence of CVD risk in rural Uganda.

Methods: In a cross-sectional study nested within a population-wide census, 857 community-living adults completed physical and laboratory-based assessments to calculate individual ideal CVH metrics including an eight category for CRP levels. …