Medicine and Health Sciences Commons^™

Role Of Pseudomonas Aeruginosa Exoenzymes S, T, And Y In The Modulation Of Intrinsic Apoptosis In Pulmonary Microvascular Endothelial Cells, Andrea M. Vavrinek

Honors Theses

P. aeruginosa is the most common cause of ventilator-associated pneumonia in ICU patients. P. aeruginosa uses a type III secretion system to inject exoenzymes S, T, U, and Y into host cells, exhibiting unique effects. Pulmonary microvascular endothelial cells (PMVECs) are used to evaluate cellular changes caused by exoenzymes. ExoY infection of PMVECs leads to cell rounding but does not lead to cell death, unlike ExoS/T. The current study evaluated the exoenzyme-induced modulation of intrinsic apoptosis in endothelial cells. Strain PAK, producing ExoS, T, and Y, was compared to isogenic strains expressing either S, SY, T, TY, Y, or none …

Examining Ndufab1 Expression In Head And Neck Squamous Cell Carcinoma, Addison L. Stevens

Honors Theses

Head and neck squamous cell carcinoma (HNSCC) accounts for around 4% of all cancers in the USA. HNSCC includes cancers of the oral cavity, oropharynx, nasopharynx, hypopharynx, and larynx. Reprogramming of mitochondrial metabolism has been known to promote oncogenesis. NDUFAB1, a nuclear encoded subunit of respiratory complex I (RCI) in the inner mitochondrial membrane, is abundantly expressed at the mRNA level in HNSCC patients. Based on this finding, we hypothesize that NDUFAB1 protein expression is high in HNSCC and that NDUFAB1 expression predicts a poor prognosis in HNSCC patients. We determined NDUFAB1 expression in HNSCC using immunohistochemistry and pathology guided …

Effect Of Temperature On The Microbiome Of A Laboratory-Reared Colony Of Haemaphysalis Longicornis Ticks, Brianna L. Mitchell

Honors Theses

Haemaphysalis longicornis ticks are invasive to the United States with potential to transmit several tick-borne pathogens that are native to the United States. Based on existing locations of H. longicornis in its native regions in Asia, as well as its invasive populations that are established in the United States, several geographic range prediction models have been produced to help understand future range expansion and distribution of this invasive tick in North America. Unfortunately, these models do not all agree and there is uncertainty associated with the potential geographic range expansion of H. longicornis ticks in North America. Climate can affect …

Applying Mci-062, A Novel Pan-Ras Inhibitor, To Treat Kras-Mutant Lung Cancer, Richard Fu

Honors Theses

RAS is a prevalent oncogene that is mutated in 27% of human cancers. Gain-of-function RAS mutations activate multiple downstream pathways, including the RAS-RAF-MEK-ERK and PI3K/AKT/mTOR pathways, which are critical in tumorigenesis and cancer cell proliferation. RAS proteins such as KRAS, a member of the RAS protein family, and their downstream effectors are attractive targets for cancer therapy since their mutations act as frequent drivers in lung, colorectal, and pancreatic cancers. However, RAS proteins have relatively smooth surfaces that lack traditional binding pockets, making inhibitors specific to RAS difficult to create. Recently, a novel small molecule pan-RAS inhibitor named MCI-062 was …

Utilizing Acoustic Levitation To Determine Ionic Liquid Effects On Enthalpy Of Polymerization, Davina V. Ho

Honors Theses

Ionic liquids (ILs) are emerging as an eco-friendlier alternative to traditional organic compounds. The hope with ILs in this project is to incorporate them with resins used in 3D printing to act as plasticizers which will in turn help prolong the life of the printed object. A common issue with plasticizers like phthalate in particular is they can leach out of plastics due to their vapor pressure which leads to decreased performance and can also pose a health risk being released into its surroundings or atmosphere. A major benefit of incorporating ILs in with resins comes from their low volatility …

Factors Contributing To Diminished Long-Term Outcomes Of Secondary Infections, Alia Tayara

Honors Theses

It is widely known that patients suffer diminished long-term outcomes in the years following secondary infections, infectious diseases that occur during or after treatment of a primary infection such as influenza or COVID-19. One common secondary infection is pneumonia, which has become the most fatal hospital-acquired infection. The bacterium responsible for pneumonia is known as Pseudomonas aeruginosa. The cytotoxic supernatant in these studies was generated from a PA103 strain of Psuedomonas aeruginosa with a type III secretion system that maintains the ability to transfer exoenzymes ExoU and ExoT into target cells during infection. The focus of the following studies was …

Integrative Genome Assembly Of Staphylococcus Epidermidis And Staphylococcus Hominis Strains, Cana L. Brown

Honors Theses

Due to rapid advances in sequencing technology, it is becoming increasingly easier to assemble unknown genomes from millions of short sequencing reads of nucleotides taken from the full genomic sequence (Hernandez, 2008). In this study, we used various computational programs to align reads from unsequenced strains of the bacteria Staphylococcus epidermidis and Staphylococcus hominis into a hitherto undefined, single contiguous genomic sequence. We used SPAdes to assist with template free assembly (Bankevich, 2012), BLAST to identify a suitable reference genome from closely related species (Madden, 2013), Bowtie2 to align our reads to the reference genome, SAMtools to sort and organize …

Covid-19 Media Exposure And Parenting, Abagail Roy

Honors Theses

Rationale- The COVID-19 pandemic has led to a drastic change in the way of living for most parents. A study conducted during the lockdown of Italy found that parents experienced a high level of distress (Marchetti et al., 2020). Several studies have been conducted to find how media exposure and screen time affect children but much less research has been conducted on how media exposure is related to parental feelings and parenting.

Methods- The aim of this paper is to explore the role of COVID-19 media exposure in parental aggravation, closeness to children, parental self-regulation, intolerance of uncertainty, and resourcefulness. …

Assessment Of Hypothermia As A Correlate Of Pde4 Inhibitor-Induced Nausea In Mice, Marianna Susan Oditt

Honors Theses

Type-4-cAMP-phosphodiesterases (PDE4s) are a group of isoenzymes that hydrolyze the second messenger cyclic adenosine monophosphate (cAMP). PDE4 inhibitors have many therapeutic uses including reducing inflammation, however, they also have side effects like nausea and emesis, which have diminished the clinical utility of PDE4 inhibitors. When administered to mice, PDE4 inhibitors have been shown to cause hypothermia. Given that nausea and emesis in humans are also associated hypothermia, this project served to determine whether PDE4 inhibitor-induced hypothermia may represent a correlate of nausea and/or emesis in mice. To this end, the current literature was screened for articles that explore nausea, emesis …