Biology Commons^™

The Expression Of Intestinal Tight Junction Proteins Induced By 1,25-Dihydroxyvitamin D3-Glycosides Supplementation To Reduce Bacterial Chondronecrosis With Osteomyelitis Lameness In Broilers, Kennedy M. Hicks

Biological Sciences Undergraduate Honors Theses

Bacterial Chondronecrosis with Osteomyelitis (BCO) is a leading cause of lameness in broiler chickens, impacting animal welfare and commercial poultry production. Supplementation using organic trace minerals, vitamin D, probiotics, and prebiotics has been studied to mitigate BCO lameness incidences in broiler chickens. Our previous study demonstrated that feeding Panbonis®-G-1,25(OH)₂D₃ from Solanum glaucophyllum, containing 1 µg/kg G-1,25(OH)₂D₃, to broilers for the first 28 days of their production cycle reduced BCO lameness by approximately 50%. In this study, we investigated the impact of 1,25-dihydroxy vitamin D₃ supplementation on the expression of tight junction …

Immune Function Modulation By Temperature On Isolated Rainbow Trout Macrophages, Abby Hunter

Biological Sciences Undergraduate Honors Theses

Fever is an evolutionary mechanism that enhances immune function, yet the molecular and metabolic responses to fever temperatures in ectothermic species remain poorly understood. In this study, we investigated how fever temperatures (19° C) influence macrophage function and metabolic activity in rainbow trout (Oncorhynchus mykiss), rather than normal temperatures (16° C). Using a rainbow trout monocytic cell line, RTS11, and primary head kidney-derived macrophages (HKCs), we examined the effects of fever temperatures on nitric oxide (NO) production, gene expression, protein synthesis, and energy metabolism. We found that fever temperatures increased NO production in both cell types, with further …

The Impact Of Dimerization And Condensate Formation On Notch Signaling Outcomes, Tyler Michael William Lawton

Boise State University Theses and Dissertations

Communication between cells is the cornerstone of multicellular life. This communication is facilitated through signal transduction, wherein an environmental que activates a transducer on the surface of the cell or within it. This signal is recognized and transmitted in a way that integrates every other signal that the cell is receiving at the time, culminating in a dynamic dance of molecular components producing finely tuned responses to the cellular environment. Notch signaling facilitates direct communication between neighboring cells, as well as response to various microenvironmental stimuli, to influence cell differentiation and fate. As insinuated above, these communication pathways do not …

The Effects Of Pfos Exposure On Zebrafish Dopaminergic Neurodevelopment, Allison G. Fletcher

Departmental Honors & Graduate Capstone Projects

Per- and polyfluoroalkyl substances (PFAS) are a group of environmental contaminants that cause disruptions to the nervous and endocrine systems. Perfluorooctanesulfonate (PFOS) is considered one of the most disruptive PFAS to the nervous system, and may disrupt neurodevelopment of the dopaminergic system, which has been linked to neurodevelopmental disorders like Attention Deficit/Hyperactivity Disorder (ADHD) in humans. I hypothesized that early life PFOS exposure disrupts the development of the dopaminergic system. To test this hypothesis, I exposed zebrafish to 0.05, 0.5, and 5.0 mg/L PFOS through 5 days of embryonic and larval development. To assess acute effects of PFOS on the …

Regulation Of The Hypothalamic-Pituitary-Adrenal Axis Through Corticotropin-Releasing Factor Receptor 2 Activation And Androgens Acting On Androgen Receptors In Mice Exposed To Repeat Stress Conditions, David Reilly

Biological Sciences

The hypothalamic-pituitary adrenal (HPA)-axis is the body’s main neuroendocrine mechanism for regulating stress. It has been shown in both animal and human models that anxiety and depression like behavior is more prevalent in females compared to males. Studies have shown evidence that suggests there are sex differences in the HPA-axis that likely contribute to the observed sex difference. It has been shown that anxiety related behavior and HPA-axis responsiveness is correlated with androgens acting on androgen receptors (AR). The role of androgens acting on AR has a more unclear role in stress behavior and HPA-axis regulation when subjected to chronic …

Investigating The Effects Of Sod1 Knockout On Oxidative Stress And Stress Coping Styles In Zebrafish Using Crispr Technology, Tai Prauner, Ryan Wong

Theses/Capstones/Creative Projects

Reactive oxygen species are byproducts of cellular metabolism that, when not efficiently neutralized, can damage DNA, proteins, and lipids. Superoxide dismutase 1 (SOD1) is an antioxidant enzyme that converts superoxide radicals into less harmful molecules. While its molecular function is well documented, the role of SOD1 in shaping stress-related behavior remains underexplored. This project aimed to establish foundational tools for studying the behavioral impact of SOD1 knockout across proactive and reactive stress-coping styles in zebrafish.

To support future gene-editing experiments, microinjection and breeding protocols were refined across wildtype AB, proactive, and reactive zebrafish lines. No embryos were injected with CRISPR-Cas9 …

A Genetic And Spatial Analysis Of The Last Megafaunal Species (Tapirus Terrestris) In The Paraguayan Dry Chaco Forest, Emily Bowers

LSU New Orleans Theses and Dissertations

No abstract provided.

Repair Through Recycling, Emma Murdock, Karl Aspelund

Senior Honors Projects

Repair Through Recycling is an instructional website I developed to encourage people to mend their garments rather than throw them away.I see this as a way to help address the growing issue of textile waste, where millions of garments are discarded each year. Many of these are made from synthetic materials that do not break down, contributing significantly to environmental pollution. This project features step-by-step instructional videos I created to teach the basics of mending, skills that are no longer commonly taught. These tutorials cover foundational techniques such as threading a needle and hand-stitching torn seams. The website also includes …

Firefighters' Perceived Effectiveness Of Peer Support For Job-Related Stressors, Camryn M. Travis

Senior Honors Projects

Firefighters experience immense job-related stress. Firefighters can respond to hundreds of traumatic calls or critical incidents throughout their careers. Witnessing a critical incident can be highly stressful and mentally taxing. Therefore, some fire departments offer mental health resources such as Critical Incident Stress Management/Debriefing (CISM/D) and Peer-group support to help firefighters cope with stressful incidents. Additionally, firefighters may seek professional mental health treatment. To investigate firefighters’ perceptions regarding the effectiveness of these resources, an anonymous survey of Rhode Island firefighters was conducted. The sample included 51 firefighters (n = 51), was mostly male (90.2%), and self-identified as predominantly white (94.1%) …

Substrate Complexity Is Not Correlated With Skin Pattern Complexity In Callistoctopus Furvus, Emily Lekas

Honors Theses

Callistoctopus furvus is an understudied, nocturnal octopus that inhabits shallow, subtropical waters in the western Atlantic. This species relies on camouflage to blend in to diverse environments to escape predators. To understand the relationship between substrate and skin patterning in this species, we used second-by-second analysis of video data recorded in the field. We compared frequencies of four substrate types (sand, rock, algae, and seagrass) ranked by contrast across ten skin patterns displayed by C. furvus. Chi-squared analyses showed significant results that the four substrates were unevenly represented in every skin pattern. However, the data did not support our hypothesis …

Impact Of Temperature And Microbial Infection On The Honey Bee Hemocytes, Michael E. Oeth

Master's Theses

Introduction

Honey bees (Apis mellifera) rely on hemocytes for immunity, wound healing, and hemolymph homeostasis. While 32°C reflects optimal hive conditions, suboptimal temperatures (22°C) and stressors like pathogens (Varroa destructor, bacteria) or pesticides impair hemocyte function. Using clodronate liposomes (CLD) to deplete hemocytes, we assessed how immune suppression interacts with these stressors.

Methods

Newly emerged (5-day-old) and older (15-day-old) bees were assigned to: CLD, control liposomes (LP), PBS, injection wound, or no treatment. Cohorts were exposed to 32°C (optimal) or 22°C (stressful for non-immunosuppressed bees). Fifteen-day-old bees were challenged with Escherichia coli or Staphylococcus aureus. Survival, hemolymph volume, and hemocyte …

Quantification Of Blue Carbon Within The Marine Animal Forest On The Rio Grande Valley Artificial Reef, Michelle Kathryn King

Theses and Dissertations

The protection and enhancement of coastal ecosystems provides a number of benefits such as heightened biodiversity, increased fisheries, and enhanced carbon capture (Yeemin et al., 2024). The study of blue carbon ecosystems has expanded rapidly in the last two decades since the term was coined in 2009 (Lovelock & Duarte, 2019). The most well-known blue carbon ecosystems include vegetation-dominated ecosystems such as seagrass meadows, salt marshes, and mangrove forests (Howard et. al., 2014). Prior studies have overlooked Marine Animal Forests (MAF) ability to capture carbon, until recent studies on soft coral (Coppari et al., 2019) and sponge (Rix et al., …

The Effect Of Calorie Restriction On Humoral Responses Towards The Influenza Vaccine, Grayson Kobluk

Celebrating Scholarship and Creativity Day (2018-)

Calorie restriction (CR) - a reduction in caloric intake without malnutrition - has been widely studied for its impact on lifespan and the onset of age-related diseases. Emerging research indicates that CR also influences immune function, though its effects can vary depending on the degree of restriction, duration, and individual characteristics. This study examined how CR effects vaccine-specific antibody responses following influenza vaccination. Male and female mice were maintained on either a control diet or a calorie-restricted diet and vaccinated with an inactivated influenza virus vaccine. Antibody titers were measured 28 days post-vaccination to evaluate the magnitude of the humoral …

Life In Plastic? Not So Fantastic: Marine Plastic Pollution On San Salvador Island, Dayna Wiley

Celebrating Scholarship and Creativity Day (2018-)

Marine plastic pollution, also known as marine macroplastic debris (MMD), impacts many aspects of marine ecosystems. MMD is defined as macroplastic (> 5mm) objects that are deposited in the ocean and are found floating in the water column or washed up on beaches. MMD washup is significantly affected by ocean and wind currents. The Antilles Oceanic Current and the Trade Winds move west across the Atlantic Ocean, and thus were predicted to cause more MMD deposition on the eastern side of San Salvador Island, Bahamas. Beaches on the North (Graham’s Harbor), South (French Bay), East (East Beach), and West (Columbus …

Exercise Physiological Insights Into Exercise-Induced Muscle Cramping: Blood Lactate And Creatine Kinase As Biomarkers In College Students, William Yu

Celebrating Scholarship and Creativity Day (2018-)

Creatine kinase (CK) is an enzyme that's found in the skeletal muscle, heart muscle and brain. When any of these tissues are damaged, they leak creatine kinase into your bloodstream. Elevated CK levels may indicate muscle injuries, cramping, or disease1. There are different types of CK, which are also known as isozymes for the cytoplasm, CK-MM, CK-MB, and CK-BB. CK-MM focuses on musculoskeletal, CK-MB focuses on heart muscles, and CK-BB focuses on the brain tissue. There are also two isozymes in the mitochondria15. Cramping is common problem amongst runners and can be described as “painful, spasmodic contraction of the skeletal …

The Effects Of Climate Change On The Spread Of Mosquito-Borne Diseases, Lauren Provoncha, Sarah Franta, Portia Lawrence

Celebrating Scholarship and Creativity Day (2018-)

This paper examines the impact of climate change on the spread of mosquito-borne diseases, focusing on how rising temperatures, altered precipitation patterns, and extreme weather events influence mosquito habitats and disease transmission. It explores the ecological and public health implications of these shifts and highlights the importance of understanding climate-disease dynamics to inform effective prevention and intervention strategies.

Ecological Consequences Of Variable Glacial Melting On Arctic Biodiversity: Trophic Shifts And Community Dynamics, Aislyn Malone, Audrey Swart

Celebrating Scholarship and Creativity Day (2018-)

Our project investigated the profound impacts of increasing glacial melting on various trophic levels, habitats, and other ecological processes.

Culturing And Characterization Of Arbuscular Mycorrhizal Fungi Native To The Sagebrush Steppe, Jacob Venable

Boise State University Theses and Dissertations

Arbuscular mycorrhizal fungi (AMF) are obligate biotrophs that form symbiotic associations with the roots of over 70% of terrestrial plants. These symbioses are crucial in plant nutrient acquisition, stress tolerance, and soil health. AMF inoculum could be valuable for ecological restoration, but challenges in culturing and multiplying AMF limit their use in natural habitats. In this project, I investigated methods to characterize and culture AMF native to the sagebrush steppe. For comparison, I also grew a non-native strain of the AMF fungus Rhizophagus clarus. First, I used trap cultures to multiply AMF present in roots and field soil collected …

Dental Microwear Of Miocene Primates From The Carpathian Basin, Rudabánya, Hungary, Anna K. Wilcox

Biological Sciences Undergraduate Honors Theses

This study reconstructs and compares the dietary habits of the late Miocene primates Anapithecus hernyaki and Rudapithecus hungaricus by analyzing dental microwear patterns on fossilized teeth recovered from Rudabánya, Hungary. Previous research suggested that these sympatric species were both primarily frugivores but were unable to separate them by diet. However, earlier studies were limited by smaller sample sizes and less advanced methodologies. This study used an expanded sample and modern microwear texture analysis techniques to compare molar and incisor microwear patterns between the two species. Results revealed that Rudapithecus molars exhibited higher complexity compared to Anapithecus molar complexity, suggesting a …

Assessment Of Nitrogen Source Utilization During Nitrogen Fixation And Nitrogenase Regulation By Methanosarcina Acetivorans, Avery Carter

Biological Sciences Undergraduate Honors Theses

Nitrogen is a crucial element in biomolecules such as proteins and DNA, essential for all cellular life. Biological nitrogen fixation, a process utilized by certain bacteria and archaea, reduces dinitrogen (N₂) to ammonia (NH₃), enabling growth in the absence of fixed nitrogen sources like NH₃. This process is driven by the metalloenzyme nitrogenase, which catalyzes the reaction: N₂ + 16ATP + 8e⁻ + 8H⁺ → 2NH₃ + H₂ + 16ADP + 16Pi. Due to its high energy demand, nitrogenase production and activity are tightly regulated. Among archaea, nitrogenase is found exclusively in methanogens, where its regulation remains poorly understood. We …

The Role Of Cis-Acting Super-Enhancer Long Noncoding Rnas In Triple Negative Breast Cancer Progression, Sakthi Muthukrishnan

Biological Sciences

Breast cancer encompasses a diverse range of diseases characterized by the uncontrolled proliferation of cells within the mammary gland. This condition results in an accumulation of a large number of genetic mutations within an individual, altering the complex internal signaling system of a cell. Millions of women are affected by breast cancer, which remains a significant threat despite medical advancements. Ductal carcinoma in situ (DCIS) acts as a precursor to invasive ductal carcinoma (IDC), however, not all cases progress to invasive cancer. Triple-negative breast cancer (TNBC) is identified to be one aggressive subtype of IDC, where the cells lack sufficient …

Non-Invasive Focused Ultrasound To Reduce Gut Inflammation In Parkinson’S Disease, Amal F. Siddiqui

Biological Sciences

Parkinson's Disease (PD) is a neurodegenerative motor disorder that affects millions of people worldwide, with projections suggesting the number of diagnosed cases could reach 15 million by 2040 (Dorsey et al., 2018). While PD is primarily recognized for its impact on movement, it also frequently causes non-motor symptoms, including gastrointestinal (GI) issues such as constipation, which affects 60-80% of patients. Chronic gut inflammation has been proposed as a key factor exacerbating these symptoms. Despite the prevalence of GI complications in PD, they are often overlooked, and existing treatments for constipation are limited in both efficacy and scope. Vagus Nerve Stimulation …

Stimulus Dependence Of Visually Guided Behavior In Drosophila Melanogaster, Jessica Osarenoma Airhienbuwa

Biological Sciences

Vision is very important for navigating the world around us. The fruit fly, Drosophila melanogaster, is a great model for studying how the brain controls visually guided behavior. This is because they have a small nervous system, good genetic tools, and a complete map of their brain connections. In fruit flies, visual projection neurons (VPNs) send information from the eyes to the central brain, which affects what they see and how they act. This research looks at how certain groups of nerve cells influence fruit flies' behavior based on what visual stimuli. To study the brain circuits behind these behaviors, …

Screening Modified Polycyclic Compounds In Myotonic Dystrophy Type 1 Cell Lines, Maria Villacreses Valarezo

Biological Sciences

Myotonic dystrophy type 1 (DM1) is an autosomal dominant neuromuscular disease with no treatment options and causes progressive muscular atrophy and weakness. DM1 occurs when the DMPK gene contains an abnormal CTG repeat expansion in the 3’ untranslated region. Transcription of the expansion leads to sequestration of RNA binding proteins and downstream splicing dysregulation. This dysregulation ultimately affects many systems in the body leading to the DM1 phenotype. This project consists of two parts, with one of our goals being to test experimental small molecule (MPC-04) in an immortalized patient-derived DM1 cell model. Using RNA sequencing data from patient-derived DM1 …

Genomic Diversity Of Salmonella Enterica Serotype Braenderup In New York State, Nicole Zac Soligno

Biological Sciences

The Gram-negative Salmonella enterica (family Enterobacteriaceae) is a common foodborne pathogen mainly isolated from foods of animal origin. Salmonella can be transmitted to humans, causing diverse symptoms, from self-limiting gastrointestinal diseases to more fatal typhoid fever. The young, elderly, and Individuals with weakened immune systems are especially at risk from salmonellosis. Salmonella is a concern to public health and the food industry throughout the world, and its severity depends largely on its serotype, a classification based on the unique combination of surface antigens. In this study, I aimed to elucidate the population structure and antimicrobial resistance determinants of S. enterica …

Coaggregation With Actinomyces Naeslundii Reduces Corynebacterium Matruchotii Cell Division Rate And Increases In Cell Length, Sarah M. Kenny

Biological Sciences

Corynebacterium matruchotii is believed to form a scaffold-like structure within the human oral cavity so that other species of bacteria have a place to bind. Many types of bacteria may be found within oral biofilms, commonly referred to as dental plaque. Actinomyces naeslundii are associated with dental caries and they are frequently found in dental plaques. Previous studies in our lab have demonstrated that A. naeslundii has a greater coaggregation rate with C. matruchotii than other Actinomyces species. The purpose of this study is to determine the effect of coaggregation with A. naeslundii on C. matruchotii growth kinetics. In this …

A Comparative Study Of Urban And Natural Nesting Gray Hawks In The Lower Rio Grande Valley Of South Texas, Evan Farese

Theses and Dissertations

Urbanization can negatively impact birds of prey, which occupy higher trophic levels. The Gray Hawk (Buteo plagiatus) is a neotropical raptor inhabiting the Lower Rio Grande Valley (LRGV) of Texas, where it is threatened. The species’ ecology has been little studied and it is unclear how urbanization may affect population viability. I studied Gray Hawk reproductive success, diet, and thermal ecology at nests in urban and natural habitats in the LRGV. Camera trap data showed adults at urban nests delivered mostly avian prey, while mammalian prey was most frequently brought to natural nests. Data from temperature loggers showed …

Investigating Stress Hormone Variations In Green Frogs (Lithobates Clamitans) During The Mating Season, Abby Mciver

Electronic Theses and Dissertations

Monitoring stress hormones in wildlife populations is increasingly used to understand how human activities may impact the environment. The goal of this study was to quantify corticosterone in green frogs (Lithobates clamitans) at baseline levels and in response to an acute stressor throughout the mating season. The project was conducted from May to September of 2024 at Bays Mountain Park in Kingsport, Tennessee. Corticosterone levels were determined over six consecutive days each month from May to September using a non-invasive dermal swab technique. Additionally, body metrics, water chemistry, and weather and habitat conditions were evaluated on each sampling …

Unraveling The Unknown: Characterization Of A Novel Antimicrobial Compound Found In Klebsiella Pneumoniae, Jasmal Cruz Perez

Electronic Theses and Dissertations

Klebsiella pneumoniae, a pathogenic bacterium resistant to numerous antimicrobials, is a worldwide health issue due to its ability to cause healthcare-associated diseases such as pneumonia and urinary tract infections. This study investigated an antimicrobial compound secreted by K. pneumoniae. The compound was found to possess inhibitory activity against Enterobacteriaceae members, including other Klebsiella pneumoniae strains, Citrobacter freundii, and Enterobacter cloacae. The inhibitory activity is mediated via a secreted protein that is active across a wide range of pH and temperature conditions. Higher concentrations of the compound enhanced antimicrobial activity. The antimicrobial protein suppressed biofilm formation during both …

The Role Of Ucp2 In Pancreatic Cancer Metabolism And Its Potential As A Radiosensitizer, Emily Rieff

Dissertations and Theses (Open Access)

Uncoupling protein 2 (UCP2) is a mitochondrial protein that regulates the flow of protons down the gradient established by the electron transport chain (ETC) without generating ATP, thus uncoupling the proton gradient from ATP generation. In tumors, specifically pancreatic cancer (PDAC), the ETC is highly stimulated to generate the copious ATP needed by the tumor to grow. However, extended ETC use increases reactive oxygen species (ROS), and if left unchecked, results in cell death. To evade this, PDAC employs antioxidant strategies, including upregulating UCP2 in tumor cells. In addition to its uncoupling function, UCP2 indirectly controls ROS levels by maintaining …