Found 19 projects
Poster Presentation 1
11:00 AM to 1:00 PM
- Presenter
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- Sydney Bowker, Senior, Biochemistry Mary Gates Scholar, UW Honors Program
- Mentors
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- Celeste Berg, Genome Sciences
- Rachel Dam, Genome Sciences, Molecular & Cellular Biology
- Session
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Poster Session 1
- Balcony
- Easel #105
- 11:00 AM to 1:00 PM
During development in most animals, tubes form as precursors to complex organs such as the neural tube, digestive system, and vasculature. To create a tube, cells within a sheet, or epithelium, must coordinate specific shape changes and movements. This coordination requires each cell to establish and maintain directional identity, thereby distinguishing the ‘top’ of the sheet from the ‘bottom’. While extensive research on a group of proteins, called ‘polarity proteins’, has elucidated how cells establish directional identity, little is known about how they maintain that orientation during the shape changes and rearrangements that occur during tube formation. To address this gap in our understanding, I am studying how these polarity proteins contribute to proper tube morphogenesis during the formation of specialized structures on Drosophila melanogaster eggshells called dorsal appendages (DAs). These appendages, which provide the developing embryo with oxygen, are formed from an epithelium that wraps into a tube, elongates, and then fills with eggshell protein. The epithelium sloughs off when the egg is laid, leaving the appendages as a visualization of the earlier tube formation. I used RNA interference (RNAi) to assess the role of 24 candidate proteins in DA formation. My initial results led me to hypothesize that one protein, Crumbs (crb), regulates the tube’s directional elongation. To explore this role, I am studying crb protein localization during tube elongation, assaying DA defects after knocking down expression using RNAi in subsets of cells, and analyzing the distribution of adhesion, motor, and other polarity proteins when crb is completely absent in null clones. These analyses will add to our understanding of the role of polarity proteins in the conserved development of epithelial sheets into tubes.
Performing Arts Presentation 1
12:30 PM to 2:00 PM
- Presenter
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- Hannah Sophie Probst, Senior, Drama, Law, Societies, & Justice Mary Gates Scholar, UW Honors Program, Undergraduate Research Conference Travel Awardee
- Mentors
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- Rachel Cichowski, Law, Societies, and Justice
- Catherine Cole, Drama
- Session
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Bridging Identities: Performing Arts Research Interventions
- 12:30 PM to 2:00 PM
Legal theorists have long maintained that courts operate beyond their primary function of dispute-resolution and have problematized their characterization as “objective” bodies, noting their significance as powerful social and political actors bestowed with constitutive powers of meaning-making. Virtually absent in this scholarship is an analytical angle examining this constitutive power using theory or methods from performance studies. This is surprising, as courtrooms are highly theatrical spaces. My research seeks to fill this gap in scholarship by marrying theories and methods from sociolegal studies and theatre- and performance studies to examine how courts contribute to the construction of cultural meanings pertaining to identity. This essay treats the European Court of Human Rights (Court), the judicial organ of the Council of Europe and one of the most active, powerful international human rights courts in the world. How does the Court construct notions of identity – especially around nationality, European community, gender identity, and religion? More specifically, my project asks: How are these courtroom constructions conceived and legitimized through narrative performance, and how is their sociopolitical influence shaped by the mechanics of performativity? To answer these questions, I conduct an original research project analyzing both written judgments and video recordings of oral hearings held in the Court’s Grand Chamber. I form my own criteria to analyze these hearings as performances, and create a scheme to evaluate written judgments for their performativity. I also analyze certain structural characteristics of the Court, and some legacies of its case law, as symbolic and embodied performances, examining how identity narratives are reproduced by the Court’s composition as an institution and its behavior over time. In addition to demonstrating what can be gained by critically assessing courts holistically using performance theory and methodology, I hope to illuminate exciting intersections between sociolegal studies and theatre- and performance studies with this work.
Poster Presentation 1
11:00 AM to 1:00 PM
- Presenter
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- Abigail Ilene Moosmiller, Senior, Aquatic & Fishery Sciences
- Mentors
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- Chelsea Wood, College of the Environment
- Evan Fiorenza, Aquatic & Fishery Sciences
- Session
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Poster Session 1
- Commons East
- Easel #72
- 11:00 AM to 1:00 PM
English sole Parophrys vetulus is a species of benthic flatfish that is commercially and tribally exploited off the coast of Washington State. The commercial value of English sole can decrease if the fish is infected with parasites, which degrade their appearance and health; in fact, widespread parasitic infection contributed to the closure of the commercial fishery in south Puget Sound in 1948. Clavinema mariae is a trophically transmitted nematode parasite that has increased in abundance by eight-fold since 1930 in Puget Sound. Since C. mariae is a nematode that infects hosts via ingestion, I used a diet analysis of English sole to: 1) assess the types of prey that sole consume, and 2) correlate the prey type abundance to C. mariae abundance. I evaluated the gut contents of contemporary sole collected in 2017 and historical sole collected over the past 80 years and held in the UW Fish Collection. I categorized gut contents to the lowest taxonomic family. Sole are hypothesized to primarily consume invertebrates, and C. mariae is transmitted by copepods, thus we expect copepods to represent a larger portion of the diet in more recently collected, more heavily infected sole. Knowing the type and number of organisms that English sole consume will improve our understanding of how sole interact with the Puget Sound food web; specifically, how they are initially infected with C. mariae, which would offer insight to their observed increase in abundance in sole over the past 80 years.
- Presenter
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- Olivia R. White, Junior, Pre-Sciences
- Mentor
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- Thomas Wood, Pediatrics
- Session
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Poster Session 1
- MGH 258
- Easel #191
- 11:00 AM to 1:00 PM
Hypoxic-Ischemic Encephalopathy (HIE) is a brain injury that commonly causes mortality in neonates. Current treatment consists of therapeutic hypothermia, but close to 50% of affected infants still have a poor outcome (death or severe disability). In order to discover new effective therapies, it is important to compare how different treatments affect the brain in animal studies. The research laboratory has developed a ferret model of HIE because the ferret brain has more complex gyrification compared to rodents. Animals underwent unilateral carotid ligation at postnatal age 17 days (P17), in which one side of the carotid artery was restricted temporarily and the other was restricted permanently. The animals then received periods of hypoxia and hyperoxia. To better quantify the extent of injury, a system involving measurements of the gyri, sulci, and cerebellar exposure was developed. Ex vivo brain measurements were collected from a population of 63 ferret kits at age P42, and adjusted by the weight and sex of the animal. These measurements included the lengths of: the longitudinal fissure (anterior and posterior), lateral sulci, suprasylvian sulci, coronal sulci, pseudosylvian sulci, ansinate sulci, cruciate sulci, presylvian sulci, lateral gyri, suprasylvian gyri, sigmoid gyri (anterior and posterior), coronal gyri, ectosylvian gyri (anterior and posterior), orbital gyri, and the exposure of the cerebellum. In injured animals, significant changes in the longitudinal fissure, ansinate sulci, left coronal sulci, cruciate sulci, presylvian sulci, posterior sigmoid sulci, and exposure of the cerebellum were seen compared to littermate controls. The implications of this measurement system include the ability to accurately characterize the degree of injury in animals with an hypoxic-ischemic brain injury, which will help to show whether potential treatments are neuroprotective.
- Presenter
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- Hiruni Thisanka Jayasekera, Senior, Environmental Science & Resource Management UW Honors Program
- Mentor
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- Chelsea Wood, College of the Environment
- Session
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Poster Session 1
- Commons East
- Easel #55
- 11:00 AM to 1:00 PM
Schistosomiasis is classified as a neglected tropical disease, ranking second only to malaria as the most common parasitic disease in the world. The two species of interest for this project are Schistosoma haematobium and Schistosoma mansoni, both of which can infect humans who come into contact with infested waters. The disease can manifest in urogenital (S. haematobium) or intestinal (S. mansoni) forms, leading to a variety of symptoms, including chronic pain, bladder and liver cancer, and – in extreme cases – death. Despite the extremely infective nature of schistosomiasis’ environmental stages and its complex transmission ecology, relatively little has been done to understand the effect of schistosome parasitism on the behaviors on its intermediate snail host. Expanding our understanding of snail behavior is necessary to explain the transmission dynamics of the disease and to reduce rates of human infection. In this research project, I examine snail choice behavior in infected and uninfected snails in a simulated lake habitat, and determine if schistosome infected and uninfected freshwater snails exhibit a difference in aggregation behavior, and where within a simulated pond environment infected and uninfected snails reside. I hypothesize that in a large population, both infected and uninfected snails will aggregate towards infected snails. I also hypothesize that infected snails will tend to linger closer to the surface of the water than uninfected snails and be less likely to quit the water, thus increasing the probability of transmission to a mammalian host. Understanding snail intermediate host behavior in the transmission of schistosomiasis gives us a way to control infection rates from an ecological perspective in addition to the traditional medical perspective.
- Presenter
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- Emily C Oven, Senior, Aquatic & Fishery Sciences
- Mentors
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- Chelsea Wood, College of the Environment
- Emily Oven, Aquatic & Fishery Sciences
- Session
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Poster Session 1
- Commons East
- Easel #56
- 11:00 AM to 1:00 PM
Forage fish such as Pacific herring, Clupea pallasii, are a valuable economic and ecological resource in marine food webs. Forage fish are integral species as they can drive both top-down and bottom-up effects in pelagic marine communities. Understanding population dynamics of herring and other forage fish species is essential to management. Although poorly studied, parasites of forage fish are of particular interest due to their potential effects on population dynamics and ability to predict the presence of anthropogenic contaminants in the environment. The goal of this study is to determine if parasite communities differ in composition and diversity between year-zero herring collected in offshore and nearshore (marina) environments in the Puget Sound. I am performing necropsies on 180 herring collected from 6 Puget Sound sites. I expect to find a greater abundance of parasites that use direct transmission in nearshore herring due to decreased stock mixing, as well as a greater prevalence of certain parasites due to closer proximity to anthropogenic contaminants. Parasites remain understudied in important forage fish like herring; and, this research can be used to understand population dynamics of herring in local marine environments as well as aid in fisheries management.
Oral Presentation 1
12:30 PM to 2:15 PM
- Presenter
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- Kerrie Lynn Agosta, Senior, Anthropology UW Honors Program
- Mentor
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- Rachel Chapman, Anthropology
- Session
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Session 1S: Using Anthropology to Understand Our Past and Present
- 12:30 PM to 2:15 PM
What does it take to burst the “bubble” of white privilege...what are the moves? Awaking to one’s complicity as a white person who benefits from racist systems of unearned privileges that mark a white supremacy culture can be a difficult experience. This research is the result of one person’s willingness to enter the transformative journey of following the auto-ethnographic process of dissolving and reconstituting their understanding of a white-self through the lens of indigenous scholarship and growing relationships with people of color whose voices and stories told of a reality that was unlike her own. In choosing to resist resisting the fear that is bound up in entering conversations about white privilege and racism, and holding space in an uncomfortable process, the researcher turned to her 89.7% predominately white community of Bainbridge Island, Washington to examine the culture of relationships between communities of color and those who identify as white. She asks the question “can, and if so, where, when and how are white identities transformed from positions of White Fragility and white supremacy into identities and relationships with people of color, of solidarity, allyship, accompliceship and race-traitorship in denouncing white privilege in order to create a culture that is equitable and inclusive for all people? Centering the methodology of relationships as sites of knowledge, the researcher engaged in cultivating cross-racial friendships with community members who were actively working in spaces of racial equity, inclusion, and social justice. In documenting the intersection of their lives and stories, valuable knowledge was gained in the accounts of privilege, fragility, oppression, hope, despair, joy, adversity, and triumph that is embodied in their collective experiences. This research contributes to the ongoing discovery and scholarship of the ways in which white identities move through the stages of transformation in relationship with communities of color.
- Presenter
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- Madhavi Bhuvana Kuthanur, Senior, Anthropology: Medical Anth & Global Hlth UW Honors Program
- Mentor
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- Rachel Chapman, Anthropology
- Session
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Session 1S: Using Anthropology to Understand Our Past and Present
- 12:30 PM to 2:15 PM
Black womxn in the United States have a long-standing history of creating community-based support networks and utilizing strategies of resilience to thrive in an oppressive society. Black feminist scholars have formulated useful frameworks such as “transformative work” and “intersectionality” to help contextualize long-standing practices of resistance, resilience, and transformation. As a medical anthropology student, the aim of my project is to understand how Black womxn in Seattle make sense of and advocate for the health, well-being, and safety of their communities. In order to answer this question, I collaborated with a diverse network of Black womxn who are initiating conversations about health and social justice in their churches, workplaces, and advocacy groups. Mount Zion Baptist Church, a predominantly African American church in Seattle, functioned as a community center for a network of Black womxn actively working to advance health equity. To learn about the ways that Black womxn in Seattle express, communicate, and act on their personal and political views regarding health, I engaged in participant observation at health-centered church events, advocacy meetings, marches, and health equity committee gatherings. Furthermore, I conducted structured and unstructured interviews to understand how Black womxn in Seattle perceive societal conditions and rely on support networks to radically better their lives. Through the experience of listening to Black womxn’s life history narratives, I learned about the vital role that solidarity, collaboration, and faith have in creating positive social change. My ethnographic research process has enlightened me to the importance of listening to and learning from the lived experiences of Black womxn who consistently work to transform their own health and the health of their communities.
- Presenter
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- Ellie Pickering, Senior, Anthropology: Medical Anth & Global Hlth UW Honors Program
- Mentor
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- Rachel Chapman, Anthropology
- Session
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Session 1S: Using Anthropology to Understand Our Past and Present
- 12:30 PM to 2:15 PM
Millions of people across the United States struggle with disordered eating. For the proportion of those who have been clinically diagnosed with “eating disorders”, many will continue to fall in and out of the grasps of their illness - even after the privilege of receiving comprehensive treatment and therapeutics. The issue of “chronic relapse” amongst individuals who have attended inpatient, partial hospitalization, and/or intensive outpatient care for disordered eating necessitates a thorough questioning of “treatment”, “illness”, and “recovery”. Despite so many years under the “medical gaze” of research in medicine and psychology, as well as in sociology and feminist scholarship, little has been done to make space for the voices of those affected. Therefore, the intent of this project is to strip away hegemonic discourses on disordered eating, and radically listen to those who have traditionally been silenced, isolated, and reduced to statistics in other literature. Drawing from subaltern and feminist theory, I seek to illuminate the lived and embodied experiences of women who have attended and returned to clinical treatment for disordered eating on multiple occasions. A phenomenological, (auto-)ethnographic approach is adopted to explore the liminal period between their treatment cycles. Having personally returned to treatment for disordered eating numerous times, I will use reflections from my own experience to inform my engagement and collaboration with other women who have embarked on a similar journey towards healing to produce a collection of narratives. Deeply listening to these individuals and juxtaposing their narratives may shed light on the ways they resist, negotiate, and perform relationship and identity in the sphere of “recovery”. Contextualizing healing trajectories in this way has implications for a new lens through which “relapse” and “recovery” are discussed, and could reveal what may be missed in the realm of current therapeutics for disordered eating.
Poster Presentation 2
1:00 PM to 2:30 PM
- Presenter
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- Divya Naidoo, Senior, Public Health-Global Health
- Mentors
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- Gerard Cangelosi, Environmental & Occupational Health Sciences
- Rachel Wood, Environmental & Occupational Health Sciences
- Alaina Olson, Environmental & Occupational Health Sciences
- Session
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Poster Session 2
- Commons West
- Easel #8
- 1:00 PM to 2:30 PM
Oral swab analysis (OSA) is a possible alternative sample type for tuberculosis diagnostics. It has been observed that tongue swabs contain greater amounts of Mycobacterium tuberculosis DNA than cheek swabs (p<0.0001) from tuberculosis patients. After determining that oral microbiota follows this same pattern, several factors including time-of-day swabbed and health status were analyzed to understand factors affecting the amount of bacteria on the tongue. This project aims to optimize the oral swab sampling methods in order to facilitate more sensitive diagnostic tests, using universal bacterial 16s rDNA as a proxy for Mtb DNA. Previously tested samples from South Africa were further analyzed to investigate amount of oral microbiota by day collected, HIV status, health status, and other demographic factors. To evaluate whether collecting multiple swabs per sample yielded more universal bacterial DNA, tongue swabs were taken from healthy volunteers in Seattle. Each subject provided a 1-swab sample and a 3-swab sample, which was then extracted and analyzed by a previously optimized universal bacterial PCR. Additionally, tongue scrapers are being assessed as an alternative to oral swabs. Swabs collected early in the morning had more bacterial DNA than swabs collected later (p<0.03). 3-swab samples yielded an average of 2-fold greater amounts of bacterial DNA than 1-swab samples. Bacterial biomass correlated with M. tuberculosis signal in most comparisons. Bacterial biomass may serve as a useful proxy when developing better oral swab sampling strategies for TB diagnosis.
- Presenter
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- Sarah Katherine Larson, Senior, Biology (Plant) Mary Gates Scholar, NASA Space Grant Scholar
- Mentors
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- Rachel Strickman, Civil and Environmental Engineering
- Rebecca Neumann, Civil and Environmental Engineering
- Session
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Poster Session 2
- MGH 241
- Easel #139
- 1:00 PM to 2:30 PM
Methylmercury (MeHg) is a bioaccumulative neurotoxin, dangerous to human health even at trace levels. In inundated soils, MeHg is formed from inorganic mercury by mercury-methylating microorganisms; a process termed methylation. Demethylation, by contrast, converts MeHg into less-dangerous inorganic mercury, and also occurs via microbial activity throughout the aquatic soil profile. Rice grains can be contaminated with MeHg when grown in soils where methylation rates are high; human exposure to MeHg is thus a serious public health concern in places where rice cultivation, high rates of consumption, and soil mercury (Hg) contamination overlap. Our research aims to better understand the soil conditions that favor demethylation over methylation – this information can then be used to reduce rice grain contamination through agricultural practices or rice breeding programs. Specifically, our research focuses on the role of oxygenation and carbon root exudates on the net MeHg accumulation throughout the soil profile. Rice plants grow in flooded, oxygen-free (anoxic) soils, but their roots can leak oxygen (making the rice rhizosphere oxygenated in varying degrees), as well as carbon root exudates. Our project simulated both fully oxic and transiently-oxic (transition) zones, with two different levels of root exudates; we use isotopic tracers to assess respective methylation and demethylation rates in all four treatments in both the vegetated (rhizosphere) and non-vegetated (bulk) soil. Carbon root exudates have been collected from hydroponically-grown rice variety M-206, and can be applied to different soil zones via tubules. Oxygenation of the soil can be measured with mm-scale optode imagery, which allows delicate testing of various oxygen-introduction designs. My role in this interdisciplinary project has been to develop, scale-up, automate, and verify the accuracy and dependability of root-oxygenation and root-exudate introduction systems to be used in upcoming experiments.
- Presenter
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- Vivienne Etain Riggs Acuna, Senior, Biology (General), Sociology
- Mentors
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- Thomas Wood, Pediatrics
- Kylie Corry, Pediatrics
- Daniel Moralejo, Pediatrics
- Session
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Poster Session 2
- MGH 258
- Easel #184
- 1:00 PM to 2:30 PM
The most recent National Vital Statistics Report reports that approximately 9.85% of babies in the United States are born preterm, with 72% of those born late-preterm (at 34-36 weeks of gestation). Using neonatal ferrets at age 17 days old, the Juul lab in the Division of Neonatology at the University of Washington Medical Center has developed a preliminary model of brain injury to mimic late-preterm neonatal injuries. In this species-specific adaptation of the Vannucci Model, the left carotid artery is permanently ligated, along with a temporary (4h) occlusion of the right carotid artery. Ferrets are then exposed to periods of hypoxia and hyperoxia. By looking at data and outcomes from our surgeries, I aim to examine the effects of certain surgical parameters on ferret mortality. These parameters include: time the animal is exposed to isoflurane, the length of surgery, and the amount of time the animal is given to recover between surgery and hypoxia. Aside from mortality, I will also analyze the effects of these parameters on respiratory rate after surgery as well as gross brain injury and data from behavioral testing in an attempt to discern the level of injury in living animals and the most common predictors of death in those that died prior to their determined endpoint.
Oral Presentation 2
3:30 PM to 5:15 PM
- Presenter
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- Nadya Ekhteraee-Sanaee, Senior, Economics UW Honors Program
- Mentor
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- Rachel Heath, Economics
- Session
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Session 2O: Economic Issues
- 3:30 PM to 5:15 PM
Take Charge is a statewide family planning initiative that provides men and women in Washington State with free access to family planning services. As one of the most accessible family planning programs in the nation, Take Charge has expanded into school based clinics, allowing adolescents as young as thirteen to receive contraceptives without the knowledge of their parents. Success of family planning initiatives are typically measured by how much they reduce unintended pregnancies among their low income or minority populations, but the effect of these programs on economic indicators such as income and educational attainment are generally less well explored. Thus, the purpose of this research project is to determine the impact of having access to Take Charge on college completion for Hispanic women in Washington State. To address this question, individual level data from the Minnesota Population Center Current Population Survey were used to conduct a variety of difference-in-difference and triple difference tests to measure the effect of having access to Take Charge on college completion. The results depict that having access to this program starting at age 13 significantly increased the likelihood of completing college by 14-18% for Hispanic women. These findings imply that Take Charge can be used as a model program for other states that hope to reduce their number of unintended pregnancies and increase college completion among their low income and minority populations.
Poster Presentation 3
2:30 PM to 4:00 PM
- Presenter
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- Sophia Robinson, Senior, Psychology
- Mentors
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- Kristina Olson, Psychology
- Lily Durwood, Psychology
- Session
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Poster Session 3
- Commons West
- Easel #16
- 2:30 PM to 4:00 PM
The mental health of transgender children, children who have socially transitioned to live as the gender “opposite” their assigned sex at birth, have not been researched extensively, although the occurrence of childhood social transitions have increased in recent history. Instances of bullying and discrimination are reported in the LGBTQ community in high rates, which has been known to lead to higher rates of internalized symptoms. Previous studies have looked at the stress buffering hypothesis, which postulates that social support protects against the negative effects of victimization experiences, but the results from those studies are mixed. In the present study, we examine whether social support moderates the association between bullying and discrimination with internalizing symptoms in transgender youth. To test our hypothesis, we had the parents of 265 socially transitioned children, from ages 3-15 (mean age 9.41), answer questions regarding a child’s support structure (family, peer, school) and whether their child has been bullied and/or discriminated against specifically because of their gender. Our results show that the relationship between victimization experiences and internalizing symptoms was moderated by peer support, but not by family support or school support. We found that when participants had less peer support, being victimized more was associated with more internalizing symptoms, while higher levels of peer support do not yield significant results between the two variables, indicating that peer support may act as a buffer between victimization experiences and internalizing symptoms in transgender youth.
- Presenter
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- Hienschi V. Nguyen, Junior, Bioengineering
- Mentors
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- Kim A. Woodrow, Bioengineering
- Jamie Hernandez, Bioengineering
- Session
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Poster Session 3
- MGH 241
- Easel #144
- 2:30 PM to 4:00 PM
For women to have protection from unintended pregnancy and human immunodeficiency (HIV), current lead prevention options use oral antiretroviral drugs (ARV) for pre-exposure prophylaxis (oral PrEP) along with a form of contraception. Failure to adhere to these drug therapies will increase the risk of contracting HIV or pregnancy. We have proposed to integrate drug-eluting materials onto a copper-intrauterine device (IUD) that could provide both HIV prevention and contraception. We will evaluate two methods to formulate a matrix release drug delivery system. Injection molding is a method to inject material into a mold that can be used for constructing drug-eluting medical devices with low drug degradation. For our purpose, we injected a polymer and drug combination into a mold to construct a solid slab. Whereas, electrospinning is a method that uses electric force to formulate stable and high surface-to-volume ratio nanofibers with high drug encapsulation and porosity compared to the molded slab. Both delivery systems will be used to administer ARV drugs to the female genital tract for a year. We optimized the molded slab and electrospun nanofibers technique for maximum polymer-loading, and used 3-D printing and nanofiber wrapping technique as a process for slab integration and fiber integration onto the IUD respectively. The polymer and drug combinations for both electrospun nanofibers and molded slabs were chosen to have the maximum drug-loading and stable mechanical properties. Drug release was measured in vitro to predict daily release rates out to three years. The ideal matrix release drug delivery system method for the dual HIV prevention and conception IUD is determined based on the mechanical properties and drug release rate of the polymer and system combination. We also investigated the drug delivery systems for cytotoxicity to verify dosage safety.
- Presenter
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- Kimberly (Kim) Gutierrez, Non-Matriculated, Microbiology, University of Washington Louis Stokes Alliance for Minority Participation, UW Post-Baccalaureate Research Education Program
- Mentor
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- Joshua Woodward, Microbiology
- Session
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Poster Session 3
- MGH 206
- Easel #172
- 2:30 PM to 4:00 PM
Secondary nucleotide messengers are used by all domains of life to sense and respond to the changes in their environment. In bacteria these secondary nucleotide messengers play a role in regulating several signaling pathways such as cell wall homeostasis, motility, and the expression of virulence genes. The nucleotide cyclic di- 3, 5’ adenosine monophosphate (c-di-AMP) was recently added to the list of secondary nucleotides. C-di-AMP is found in many bacteria such as S. aureus, S. pneumoniae, B. subtilis, and L. monocytogenes (Lm). C-di-AMP has been best characterized in Lm, a well-studied intracellular pathogen. Lm has adapted to survive and replicate in the host cell cytosol by evading host cell defenses through use of key virulence factors. In Lm, synthesis of c-di-AMP is catalyzed by the diadenylate cyclase dacA and degradation is coordinated by the phosphodiesterases, pdeA and pgpH. Studies using Lm mutants that lack both pdeA and pgpH contain abnormal c-di-AMP levels that cause growth and virulence defects of about four logs compared to wild type Lm. This highlights the importance of c-di-AMP regulation for bacterial virulence and growth, but we still know very little about c-di-AMP regulation and toxicity. Our goal is to further understand the toxicity of high levels of c-di-AMP during bacterial infection. We aim to create a transposon library in the double phosphodiesterase KO (ΔΔ Pde) background to identify suppressor mutations. Previous approaches to analyzing suppressor mutations in the ΔΔ Pde strain has not been thorough or cannot be utilized in vivo. Therefore, we have created an amenable phosphodiesterase mutant that knocks out the phosphodiesterases in Lm (pdeA and pgpH) to grow in vivo successfully to investigate c-di-AMP regulation. Understanding the regulation of c-di-AMP could result in targets for novel treatments against Lm and allow for ways to investigate regulation methods of c-di-AMP in other organisms.
Poster Presentation 4
4:00 PM to 6:00 PM
- Presenters
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- Salma Al-Sammary, Senior, Anthropology: Medical Anth & Global Hlth Mary Gates Scholar
- Shukri Hassan, Senior, Public Health-Global Health
- Mentors
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- Rachel Chapman, Anthropology
- Jihan Rashid, , Somali Health Board
- Session
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Poster Session 4
- Commons East
- Easel #43
- 4:00 PM to 6:00 PM
Women in the most underserved area of Seattle experience higher rates of pre-term birth, low birthweight rates, and cesarean section surgeries. The focus of this project is to see if female genital circumcision (FGC) correlates with the cause of these issues, but also if there are other factors that have an influence on high reproductive health disparities such as, racism, access to resources, and any other barriers of the community that are driving these issues. This project works with Somali immigrant and refugee residents in the south Seattle area because it is the most under-served, ethnically and economically diverse area. Somalia has the highest rate of women who have undergone the practice of FGM/C with a leading 98% of the female population between the ages of 15-49 years being circumcised. My project works collaboratively with the Mama AMAAN Project which seeks to test out a community-led, integrative services approach to improve perinatal health outcomes in this population. The goal of my project is to understand why these issues are consistently happening amongst women that come from similar backgrounds, more specific amongst East African women. While trying to reach the goal of this project, we seek to answer the following questions; What are the ways that FGC played a part in their perinatal experience and outcomes for Mom and infant? What is their perspective on the practices of FGC in Seattle as relates to themselves, their families, their community? To accomplish the goal of my research I plan on using qualitative methods by conducting written surveys, participant-observation during child birth education sessions. This project is significant because it assesses the reason for the high rates of reproductive health disparity that we are seeing amongst the women of the Somali community and how FGC is related to those problems, if at all.
- Presenter
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- Rita Noor Olson, Senior, Microbiology
- Mentors
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- Rachel Wood, Environmental & Occupational Health Sciences
- Gerard Cangelosi, Environmental & Occupational Health Sciences
- Session
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Poster Session 4
- Commons West
- Easel #4
- 4:00 PM to 6:00 PM
Tuberculosis (TB) remains a major international health concern and one of the top 10 causes of death worldwide, according to the World Health Organization. Previous clinical work in our lab demonstrated that oral swab analysis (OSA) can successfully diagnose tuberculosis by detecting Mycobacterium tuberculosis DNA in the mouths of infected patients. In order to strengthen OSA against traditional but more invasive methods, such as sputum sampling, improvements to DNA extraction and swab type must be investigated. I am comparing different degrees of automation with MolBio’s Trueprep, the AudioLyse, and ThermoFisher’s KingFisher against our previously validated manual Qiagen extraction protocol—with the comparison lying in sensitivity and efficiency. In order to increase the versatility and sensitivity of OSA, I am also investigating boil preparations and dissolvable swabs. Boil preparation of swabs is a relatively simple extraction procedure, and early results have demonstrated its comparability against the Qiagen extraction. Meanwhile, dissolvable swabs have a hypothetical 100% yield of sample material. I have successfully dissolved calcium alginate swabs from Puritan in acidic sodium citrate solutions, and Luna swabs were dissolved in chaotropic agents. DNA yields are compared to non-dissolvable, previously validated swabs.
- Presenter
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- Gabrielle Tejada Jamora, Junior, Psychology
- Mentors
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- Shannon Dorsey, Psychology
- Grace Woodard, Psychology, RISE Mental Health
- Session
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Poster Session 4
- Commons West
- Easel #20
- 4:00 PM to 6:00 PM
In a majority of low- and middle-income countries (LMICs), resources for mental health care are extremely limited. For children and adolescents especially, there is little to no mental health care available. In a recent large randomized controlled trial, an evidence-based treatment (EBT) was delivered in two LMICs, Kenya and Tanzania, using trained lay counselors in a task-shifting/sharing model. Over a 12-week span consisting of weekly group meetings, this EBT, trauma-focused cognitive behavioral therapy (TF-CBT), was delivered to orphaned children who had posttraumatic stress (PTS) and/or grief symptoms, along with their guardians. The effects sizes were large for child PTS/grief, but little is known about how to scale up and implement TF-CBT to benefit more children. The current study uses data from a large TF-CBT trial implemented in 10 schools and 10 communities in Kenya by existing staff who served as lay counselors (teachers in schools and community health volunteers [CHVs] in communities). After the delivery of the treatment, qualitative interviews were conducted with the lay counselors from 6 of 10 sites in each to better identify efficient implementation practices and policies (IPPs) that supported TF-CBT delivery. The goal of studying the IPPs is to identify those that support the effective adoption and fidelity of TF-CBT. This study pinpoints which IPPs are most critical for the different settings, sectors, and populations that this study encompasses. We analyzed the IPP resource provision to be able to compare the difference in resource allocation in urban versus rural settings in regards to transportation, materials, etc. This study allows us to gain a better understanding of the necessary implementation strategies to better tailor to the needs of communities to support evidence-based mental health care in specific sectors and settings in LMICs.