Digital Commons Network^™

Exploring Stem Cell-Based Approaches To Ameloblast-Like Cell Development: Progress And Limitations In Enamel Formation, Ava L. Abruzzese

Honors Scholar Theses

Enamel is one of the most critical structural components of the tooth. As the outermost layer, it serves as a protective barrier, shielding the underlying dentin and dental pulp from physical trauma and mechanical forces. The formation and mineralization of enamel are regulated by specialized cells known as ameloblasts. Once enamel maturation is complete, these cells undergo apoptosis. Consequently, enamel lacks the capacity for natural regeneration after damage or erosion, which can result from various environmental factors. When enamel is compromised, current clinical interventions focus on preventing further deterioration rather than true regeneration. These approaches include the use of remineralizing …

Preclinical Animal Modeling To Investigate Redox-Mediated Molecular Dysfunction In Traumatic Brain Injury, Brandon Z. Mcdonald

Department of Agricultural and Biological Systems Engineering: Dissertations, Theses, and Student Research

Impacts associated with traumatic brain injury (TBI) induce a multitude of neurological morbidities mediated by a spread of biochemical dysfunction. Redox stress is a significant contributor to TBI pathophysiology and several redox stress markers have substantial evidence to support their role in diagnosing preclinical and clinical TBI. However, there is a critical need to verify their translational utility through correlations with behavioral, imaging, and molecular modalities. In chapter two, we examined the therapeutic efficacy of an antioxidant treatment (NPC3) using a controlled cortical impact (CCI) mouse model of TBI. NPC3 alleviated glial expression and reactivity while influencing the expression of …

Three Essays On Veterinary Drug Maximum Residue Limits, Akinbode Okunola

Department of Agricultural Economics: Dissertations, Theses, and Student Research

This dissertation consists of three essays: the first examines the prevalence of veterinary drug maximum residue limits (MRLs), the regulatory behavior of countries in setting these MRLs, and the degree of country-level compliance with international standards of Codex Alimentarius (Codex). The second evaluates the extent to which compliance with international standards across countries can help to manage potential transmission of resistant bacterial from animals to humans through consumption of contaminated meat, dairy and aquaculture products. The third focuses on how differences in regulatory standards across countries can impact international trade in the global beef, pork, and poultry markets.

The first …

Prefrontal Engagement In Cognitive Flexibility Across Paradigms, Katarina Kalajzic

Honors Scholar Theses

Cognitive flexibility is an executive function that involves dynamically adapting behavior in the face of changing environmental circumstances to achieve a particular goal. Disrupted in numerous psychiatric disorders such as Alzheimer’s disease, schizophrenia, OCD, and depression, the neural correlates of cognitive flexibility are not well understood. However, the prefrontal cortex (PFC) is strongly implicated in executive function and attentional control processes. Thus, we sought to examine the neural circuitry involved in distinct cognitive flexibility tasks – the attentional set-shifting task and the probabilistic 2-armed bandit task. Through optogenetic suppression, we targeted pyramidal neurons of the rodent medial prefrontal cortex, an …

Glucagon-Like Peptide-1ra As A Public Health Interventions, Briana Sepeda

Electronic Theses, Projects, and Dissertations

Glucagon-like peptide receptor agonist (GLP-1RA) medications have become a prominent topic of interest both in clinical medicine and broader societal discussions. Although the medication are relatively new and expensive, ongoing research continues to explore pharmacologic modifications aimed at improving therapeutic effectiveness and prolonged drug half-life. GLP-1RAs have gained significant traction due to their ability to lower glycosylated hemoglobin (A1c) and blood glucose levels in individuals who have been diagnosed with type 2 diabetes (T2D). In addition to glycemic control, evidence suggests its associations with appetite suppression, weight loss, reducing cardiovascular disease, improved renal dysfunction, neuroprotective effects related to neurodegenerative disease …

Feasibility Of Assessing Dietary Patterns And Anxiety In College Students: A Pilot Study Using Nutrition Questionnaires, Gad-7, And Asq, Kylie Ford

Electronic Theses and Dissertations

Anxiety is highly prevalent among college students representing a significant public health concern. Research indicates that dietary patterns may influence mental health outcomes; however, the practicality of collecting comprehensive dietary and psychological data in college populations remains unclear. This pilot study assessed the feasibility of evaluating dietary patterns and anxiety using self-report instruments. Participants completed the Nutrition and Eating Habit questionnaire, the Generalized Anxiety Disorder-7 (GAD-7), and the Anxiety Sensitivity Questionnaire (ASQ). Although twenty-one students were recruited, survey completion rates were low, with only seven participants completing the nutrition questionnaire necessary to calculate the Dietary Inflammatory Index (DII). Descriptive analyses …

Ligand-Based Pharmacophore Modeling And Structure-Based Virtual Screening For Identifying Potential Therapeutic Agents Targeting The Sars-Cov-2 Spike Protein-Ace2 Receptor Interaction, Timoteo Delgado-Maldonado, Gilberto Vargas-Salas, Debasish Bandyopadhyay, Adriana Moreno-Rodriguez, Eyra Ortiz-Pérez, Gildardo Rivera-Sanchez

School of Integrative Biological & Chemical Sciences Faculty Publications

Coronavirus disease (COVID-19) remains a global health concern due to its high mortality and morbidity. In this study, we combined ligand-based pharmacophore modeling (LBPM) with structure-based virtual screening (SBVS) to identify novel inhibitors targeting the SARS-CoV-2 spike protein. Ligands from the MolPort database were screened via docking and molecular dynamics simulations at the receptor-binding domain (RBD). Four compounds showed promising docking scores (-8.7 to -6.4 kcal/mol) and dynamic stability (root mean square deviation < 5 Å). In vitro assays confirmed that compounds C3 (IC50 = 0.03 µM) and C4 (IC50 = 10.4 µM) effectively inhibited spike-ACE2 binding with low cytotoxicity (CC50 > 100 µM). These findings show the efficacy of the LBPM technique and highlight 1H-pyrazol-5-ol derivatives as potential building blocks for developing new antiviral agents against SARS-CoV-2.

Parkinson’S Disease And Its Treatments: An Overview, Nathaniel Cook

Senior Honors Theses

Parkinson’s disease (PD) is a neurodegenerative disease closely associated with the accumulation of α-synuclein in neurons, and inhibition in the release of dopamine, a key neurotransmitter of the nervous system. Disruption in dopamine signaling can cause cognitive and motor dysfunctions, with tremor, bradykinesia, and rigidity being the most observable effects. There is no permanent treatment for PD, constituting the need for further research to improve current pharmaceutical approaches and possibly develop a cure. Main areas of research include improving medication via delivery methods, genetic mutation using CRISPR, and adaptive deep-brain stimulation. Recent developments and applications in these areas will be …

Sepsis As An Immune Continuum: Cytokine Storm To Lymphopenia And Pics, Chelsey King

Senior Honors Theses

Sepsis is a leading cause of morbidity and mortality worldwide, driven by a dynamic immune continuum that progresses from early hyperinflammation to profound immunosuppression. This review examines the three overlapping phases of sepsis: the inflammation-mediated cytokine storm driven by dysregulated PRR activation, NF-κB signaling, and NETosis; apoptosis-driven lymphopenia involving caspase-mediated lymphocyte death, dendritic cell dysfunction, and metabolic exhaustion; and prolonged immunoparalysis culminating in persistent inflammation, immunosuppression, and catabolism syndrome (PICS). Key mechanisms linking these phases, including the co-existence of hyper- and hypo-inflammatory states, are synthesized alongside relevant clinical biomarkers such as IL-6, HLA-DR, and single-cell immune profiles. This review highlights …

The Effects Of Dietary Interventions On Gut Microbial Balance In Healthy Adults: An Integrative Review, Miranda Demars

Senior Honors Theses

The goal of this review is to answer the question: What dietary changes are most effective in restoring gut dysbiosis in healthy adults? The gut microbiome (GM), a community of microorganisms that colonizes in the gastrointestinal (GI) tract, can become imbalanced, a condition known as dysbiosis, which is associated with an increased risk of dysbiosis-induced disease. Dysbiosis-induced diseases include GI disorders such as irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD), neurological disorders such as Alzheimer’s disease (AD) and Parkinson’s disease (PD), and metabolic disorders such as diabetes and obesity (Shen et al., 2025). Pharmacologic interventions are often not …

Volume 17, Christian O’Neill, Kyara Greene, Savva Sidorov, Laura Bisaillon, Luke Clemmer, Hannah Gordon, Kitt Benson, Taylor Blount, Rachel Danzitz, Nicholas Duellman, Chase Gionis, Hima Fernando, Seth Franzyshen, Onyx Gonzalez, Bryan Lin, Samantha Start, Ysabel Wells, Maggie Duncan

Incite: The Journal of Undergraduate Scholarship

Introduction Dr. Amorette Barber, Director, Office of Student Research

From the Editor Dr. Hannah Dudley-Shotwell

Cover Artist’s Statement Maggie Duncan

On Mentoring Dr. Yulia Uryadova

Ukrainian Resistance in the Face of Russification: Nestor Makhno and Anarchism

by Christian O’Neill

Life Vest by Kyara Greene

Isolation and 16S rRNA Identification of Bacteria from Fire Department Connection Pipe by Savva Sidorov

The Effectiveness of Planned Exercise in Reducing ADHD Symptoms in Children by Laura Bisaillon & Luke Clemmer

Linguistic Analysis on Confidence and Communication Strategies with Disparities Between Sign Fluency and Hearing Impairment by Hannah Gordon

Freedmen in Indian Territory by Kitt …

Pattern Dynamics And Stochasticity Of Brain Rhythms And Spike Trains In A Tauopathy Mouse Model Of Alzheimer’S Disease, Clarissa M. Hoffman

Dissertations and Theses (Open Access)

Systems neuroscience posits that every aspect of perceived physical reality, every aspect of animal and human behavior, and every cognitive phenomenon emerges from patterns of neuronal activity. While most researchers embrace this idea, there are major difficulties in describing and analyzing these complex neuronal dynamics—spike flows produced by cells ensembles, synchronized extracellular field oscillations, and other patterns—which limits our understanding of how the activity of individual neurons and the whole-animal cognition and behavior might be connected. In particular, we lack the approaches and even the semantics for connecting the individual cell outputs and the integrated results of their activity. Current …

Learning About The Direct Experiences Of Very Young Children With Hearing Loss: A Feasibility Study, Jenni M. Funk

Undergraduate Honors Capstone Projects

We aimed to explore the feasibility of employing a developmentally appropriate, modified puppet interview method to elicit thoughts and perspectives directly from very young children (ages 3 to 6 years old) who are deaf or hard-of-hearing. Little is known about the direct experiences of children with hearing loss, making it difficult to improve care. In our field of speech and hearing sciences, there is no current method of gathering direct experiences of young children and placing them at the center of care. We proposed that researchers may be able to learn about the direct experiences of very young children who …

Understanding Vaccine Hesitancy In Veterinary Medicine: A Review Of Client Attitudes, Grace Moore

Undergraduate Honors Capstone Projects

Uncertainty toward vaccination, long recognized as a public health concern in human medicine, is increasingly recognized within veterinary contexts, posing risks to both animal and community health. This literature review examines the development, causes, and implications of reduced vaccine confidence in veterinary medicine, with emphasis on small animal and some large animal practices. The review combines historical and current research to explore how vaccination perceptions have evolved among veterinarians and clients, and how factors such as the COVID-19 pandemic have shaped current attitudes.

The literature highlights recurring themes surrounding vaccine reluctance in veterinary settings. Client perceptions of safety, efficacy, and …

Abnormal Trafficking And Processing Of Multiple Matrix Metalloproteinases Drive Cartilage Defects In Congenital Disorders Of Glycosylation, Chia-Lun Wu

All Dissertations

Congenital Disorders of Glycosylation (CDG) are rare metabolic diseases caused by defects in glycosylation. Despite identification of over 200 CDG types, the mechanisms linking glycosylation defects to diverse clinical phenotypes remain unclear. This dissertation uses zebrafish models of PMM2-CDG and STT3-CDG to redefine CDG pathogenesis, shifting from a simple glycan deficiency model to one involving disrupted cellular spatial organization.

We identify a protease-dependent pathway underlying craniofacial cartilage defects. Specifically, defective proteolytic processing of N-cadherin, a key adhesion molecule in chondrogenesis, is a central driver of pathology. We further uncover an unconventional trafficking mechanism in which ER stress and altered secretory …

From Synapse To Circuit: Mechanisms Of Behavioral Flexibility And Its Restoration After Prenatal Alcohol Exposure, Jayapriya Chandrasekaran

Biomedical Sciences ETDs

Behavioral flexibility—the ability to adapt behavior when contingencies change—is a fundamental executive function supported by orbitofrontal–striatal circuitry. This dissertation examined molecular, motivational, and circuit mechanisms underlying flexibility and its restoration after prenatal alcohol exposure (PAE). In healthy mice, GluN2B-containing NMDA receptors in the orbitofrontal cortex increased during outcome updating, while AMPA receptor subunits in the dorsal striatum rose during new learning, defining temporally distinct plasticity processes. PAE impaired reversal learning under low-reward conditions, but not when motivation was high, indicating altered thresholds for circuit engagement rather than permanent loss. Finally, optogenetic stimulation of OFC→dorsal striatum projections rescued flexibility in PAE …

How Are Women Dealing With Polycystic Ovary Syndrome?, Adrianna A. Brown

Electronic Theses, Projects, and Dissertations

Background and Aims: PCOS is one of the leading multisystem conditions among women of reproductive age. Dietary changes may help improve outcomes associated with PCOS and its comorbidities. While a lower carbohydrate, moderate protein diet is often recommended, those with PCOS often use temporary diets or dietary supplements instead of or in addition to prescription medications due to dissatisfaction with their treatment options. Additionally, studies examining the usefulness of supplements and their effects on PCOS symptoms are lacking. This study explored the prevalence of use of temporary diets, prescription medications, and dietary supplements among women with PCOS.

Methods: An anonymous …

Evaluating The Impact Of Myplate-Based Expanded Food And Nutrition Education Program (Efnep) On Healthy Dietary Choices Among Low-Income Families, Theresa N. Agbonome

Electronic Theses, Projects, and Dissertations

Dietary behaviors towards healthy food choices remain a major public health issue in the United States, with prevalence among low-income families. The University of California Agriculture and Natural Resources (UCANR) with Expanded Food and Nutrition Education Program (EFNEP) trains both health educators and volunteers to provide community-based nutrition education, which prioritizes low-income families. The initiative employs the MyPlate guidelines that are composed of 5 different food groups which include fruits, vegetables, protein, grains, and dairy products. This project focuses on evaluating nutritional habits of disadvantaged families within San Bernardino County (SBC) by using an evidence-based evaluation tool known as the …

Understanding The Role Of Toxs As A Bile Sensing Component Of The Toxrs Virulence Regulatory System In Vibrio Spp., Minje Kim

Dartmouth College Ph.D Dissertations

Pathogenic Vibrio bacteria, such as V. cholerae and V. parahaemolyticus, colonize in the human small intestine to cause severe gastrointestinal disease. During the infection, these bacteria encounter bile salts, antimicrobial cholesterol metabolites secreted into the intestine. Pathogenic Vibrio species have evolved to utilize bile salts as signals to regulate virulence. The signaling depends in part on ToxRS, a conserved co-component transmembrane transcription regulator. ToxRS consists of the transcription factor ToxR and its membrane-tethered binding partner ToxS. ToxS is required for ToxR stability and full transcriptional activity. Although bile salts are known to influence ToxRS-dependent virulence gene expression, the molecular …

Clawing Our Way To Inclusion: Identifying Minority Students’ Barriers To Entering The Veterinary Medicine Profession, Danielle Reeves

Animal Science Undergraduate Honors Theses

Veterinary services are being utilized more each year as pet owners are increasingly viewing and treating their pets like family members. Due to this changing perspective, the veterinary profession has grown significantly. Yet, despite this change, there is a lack of ethnic/racial diversity within the veterinary field. The purpose of this study was to determine the factors and/or barriers associated with minority students' desire or lack of desire to pursue a career in veterinary medicine. This study used an online survey tool to collect qualitative and quantitative data from 423 undergraduate students at the University of Arkansas during the spring …

Plan To Develop A Theory-Based Diabetes Social Media Campaign For Spanish-Speaking Adults In Finney County, Ks: Integration Of A Promotora, Focused Discussion Groups, And Community Feedback To Ensure Cultural Appropriateness, Julevi P. Bernido

Capstone Experience: Master of Public Health

The 2025 Community Health Needs Assessment (CHNA) shows that over 11% of adults in Finney County, Kansas, have diabetes, which surpasses both state and national averages. Census data from 2016-2020 indicate that 42.6% of residents ages five and older speak a language other than English at home, and 36.1% speak Spanish (United States Census Bureau, n.d.). The CHNA further highlights concerns about language and cultural barriers to care, especially among the Spanish-speaking population. Notably, 21.74% of residents have limited English proficiency—much higher than the state’s 12.1% (CHNA, 2025).

This capstone will develop a theory-based social media campaign plan to support …

A Literature Review Of Estrogen Synthesis And Metabolizing Enzymes Produced By The Human Gut Microbiome And Their Correlation With Cancer, Rebecca Cederberg

Capstone Experience: Master of Public Health

The link between estrogen and cancer initiation or progression has been well established; such that the World Health Organization’s International Agency for Research on Cancer (WHO IARC) has classified several estrogen therapies and estrogenic compounds as group 1 carcinogens. Estrogen and/or its receptors have been associated with reproductive cancers such as breast, ovarian, endometrial, and prostate, as well as lymphomas, lung, and colon cancers. Additionally, elevated levels of estrogen and altered gut microbiomes are also associated with increased rates of breast cancer. More recently, microbial genes that are capable of synthesizing estrogen and deconjugating estrogen metabolites have been identified, and …

In-Vitro Testing Of Light Wavelength To Detect Clots In Neonatal Extracorporeal Membrane Oxygenation Circuitry, Amanda Holmes

Dissertations and Theses (Open Access)

Background: Neonates requiring extracorporeal membrane oxygenation (ECMO) are at high risk for thrombotic complications, which contribute substantially to morbidity and mortality. Current circuit surveillance methods rely on intermittent visual inspection and indirect laboratory markers, both of which often detect thrombosis only after clinically significant progression. Optical approaches offer a non-invasive alternative for earlier clot visualization, yet the influence of illumination wavelength on detection performance under realistic ECMO conditions remains incompletely characterized.

Methods: This study evaluated wavelength-dependent clot detection performance in a controlled in-vitro neonatal ECMO circuit model using a portable imaging prototype designed to emulate bedside workflow. Twelve independent ECMO …

Segmental Trans-Endplate Pedicle Screws Do Not Induce Spinal Deformity In A Porcine Model, Taylor R Johnson, Talissa O Generoso, Christine Farnsworth, Amishi Jobanputra, Jonathan H Wen, Austin J Stoner, Arianne Salunga, Vivian Ho, Miranda Guzman, David Berry, Vidyadhar Upasani, John S Vorhies

Faculty, Staff and Student Publications

Purpose: Growth modulation is an established technique for limb deformity correction and is increasingly applied to spinal deformities. While distraction-based posterior and anterior compressive methods have been explored, spinal growth modulation through fixation across vertebral growth centers remains unstudied. We hypothesized that unilateral trans-endplate screws-spinal epiphysiodesis trajectory (SET) screws-could induce partial anterior growth arrest and promote scoliotic deformity in a porcine model.

Methods: Four male piglets (two experimental, two control) underwent unilateral posterior spinal instrumentation at four lower thoracic levels at eight weeks of age. Experimental animals received trans-endplate SET screws; controls received pedicle screws. Radiographs obtained three months postoperatively …

Race To Mitigate Aortic Dissection: Exercise, Pde5a, And The Dissecting Aorta, Siddharth K Prakash

Faculty, Staff and Student Publications

No abstract provided.

Severe, Non-Apneic Respiratory Dysfunction And Hypoxia Following Generalized Convulsive Seizures, Haley E Pysick, Rup K Sainju, Roshni Nair, Deidre N Dragon, Eduardo Bravo, Laura Vilella, Xiaojin Li, Samden D Lhatoo, George B Richerson, Brian K Gehlbach

Faculty, Staff and Student Publications

Objective: Sudden unexpected death in epilepsy (SUDEP) is a devastating consequence of some generalized convulsive seizures (GCS). Recent work has focused on seizure related apnea as a biomarker of SUDEP risk, frequently without characterizing the adequacy of non-apneic ventilation or identifying other dysfunctional breathing patterns. We hypothesized that GCS frequently induce immediate, severe, non-apneic respiratory dysfunction that can induce critical hypoxia and bradycardia and sought to characterize breathing patterns after GCS.

Methods: Adult patients admitted to an epilepsy monitoring unit were studied. The effects of GCS on breathing and heart rate were analyzed using nasal pressure transducers, chest and abdominal …

Neurointerventional Advances In 2025, Amol Mehta, Sunil A Sheth, Ashutosh P Jadhav

Faculty, Staff and Student Publications

No abstract provided.

Optimized Ultrasound Imaging Of Phase-Change Nanodroplets, Charles R Dyall, Dmitry Nevozhay, Andy Liu, Trevor M Mitcham, George J Lu, Konstantin V Sokolov, Richard R Bouchard

Faculty, Staff and Student Publications

Phase-change nanodroplets (PCNDs) continue to generate significant research interest due to their potential to extravasate into tissue, to be targeted for molecular imaging and drug delivery, and to undergo an induced phase-change to "activated" microbubbles (MBs) for ultrasound (US) imaging. To accurately quantify molecular markers, however, one assumes a consistent proportion of PCNDs in a region of interest (ROI) are stably activated and imaged. Herein we present a framework for developing a diagnostic sequence that is optimized for PCND activation uniformity, contrast, and acquisition time. To develop this framework, activation was examined at three scales of increasing complexity: single, adjacent, …

Antidepressant-Like Effects Of Extinction Learning As An Animal Model Of Behavioral Therapy, Jing Liu, Sarah E Bulin, David A Morilak

Faculty, Staff and Student Publications

Exposure-based behavioral therapy, the most effective treatment for posttraumatic stress disorder (PTSD), also reduces depressive symptoms. However, neurobiological mechanisms underlying the beneficial effects of exposure-based behavioral therapy on depression remain unknown. Our lab has established fear extinction as a rat model of exposure therapy to investigate the mechanisms underlying its therapeutic behavioral effects in chronically stressed rats. In this study, we demonstrated that extinction learning reduced immobility in the forced-swim test and reversed chronic stress-induced reduction in sucrose preference. Chemogenetic inactivation of pyramidal neurons in the ventral medial prefrontal cortex (vmPFC) prevented these antidepressant-like effects of extinction. Extinction learning enhanced …

Are Drains After Trauma Splenectomy Associated With Organ Space Surgical Site Infections?, Stephanie Martinez Ugarte, Mokunfayo O Fajemisin, Seokhun Kim, William D Rieger, Renee W Green, Gabrielle E Hatton, Lillian S Kao

Faculty, Staff and Student Publications

Introduction: Left upper quadrant (LUQ) drain use after trauma splenectomy varies, with minimal existing data to guide practice. We aimed to investigate the association of LUQ drains with organ space surgical site infection (OS-SSI) after splenectomy. We hypothesized that LUQ drains after trauma splenectomy are associated with increased odds of OS-SSI.

Patients and methods: A retrospective study of adult blunt trauma patients who underwent splenectomy from 7/2018 to 6/2024 was performed. We excluded patients who survived < 5 days after operation, and those with an intraoperatively identified pancreatic injury. Demographics, surgical details, and drain information were abstracted from the medical record. Inverse probability of treatment weighting (IPTW) was used to balance variables between patients who did and did not receive an LUQ drain after splenectomy. Multivariable logistic regression with IPTW was performed to estimate the association of LUQ drains with OS-SSI.

Results: Of 179 patients, 68% (n = 121) were male, the median age was 38 years (interquartile range 28, 55), and 27% (n = …