Medical Specialties Commons^™

The Potential Regulation Of A-To-I Rna Editing On Genes In Parkinson's Disease, Sijia Wu, Qiuping Xue, Xinyu Qin, Xiaoming Wu, Pora Kim, Jacqueline Chyr, Xiaobo Zhou, Liyu Huang

Faculty, Staff and Student Publications

Parkinson's disease (PD) is characterized by dopaminergic neurodegeneration and an abnormal accumulation of α-synuclein aggregates. A number of genetic factors have been shown to increase the risk of PD. Exploring the underlying molecular mechanisms that mediate PD's transcriptomic diversity can help us understand neurodegenerative pathogenesis. In this study, we identified 9897 A-to-I RNA editing events associated with 6286 genes across 372 PD patients. Of them, 72 RNA editing events altered miRNA binding sites and this may directly affect miRNA regulations of their host genes. However, RNA editing effects on the miRNA regulation of genes are more complex. They can (1) …

Flying Under The Radar: A Survey Of Collegiate Pilots’ Mental Health To Identify Aeromedical Nondisclosure And Healthcare-Seeking Behaviors, Lauren Pitts, Emily Faulconer

Publications

The disclosure of a new or existing mental health condition in a pilot complicates their medical certification status. It has been proposed that the threat of losing medical certification often discourages pilots from seeking treatment for mental health issues or disclosing such information to aeromedical professionals, contributing to a barrier to seeking healthcare that affects pilots of all certification levels. The current study focused on the nondisclosure and healthcare-seeking behaviors of the collegiate pilot population(N = 2,452)at a large, accredited, private institution that offers flight training in accordance with Pilot Schools (2022). Data collected from our anonymous online survey over …

Neurocomputational Mechanisms Of Food And Physical Activity Decision-Making In Male Adolescents., Seung-Lark Lim, Amanda S. Bruce, Robin P. Shook

Manuscripts, Articles, Book Chapters and Other Papers

We examined the neurocomputational mechanisms in which male adolescents make food and physical activity decisions and how those processes are influenced by body weight and physical activity levels. After physical activity and dietary assessments, thirty-eight males ages 14-18 completed the behavioral rating and fMRI decision tasks for food and physical activity items. The food and physical activity self-control decisions were significantly correlated with each other. In both, taste- or enjoyment-oriented processes were negatively associated with successful self-control decisions, while health-oriented processes were positively associated. The correlation between taste/enjoyment and healthy attribute ratings predicted actual laboratory food intake and physical activities …

Brain Deficit Patterns Of Metabolic Illnesses Overlap With Those For Major Depressive Disorder: A New Metric Of Brain Metabolic Disease, Kathryn S Hatch, Si Gao, Yizhou Ma, Alessandro Russo, Neda Jahanshad, Paul M Thompson, Bhim M Adhikari, Heather Bruce, Andrew Van Der Vaart, Aristeidis Sotiras, Mark D Kvarta, Thomas E Nichols, Lianne Schmaal, L Elliot Hong, Peter Kochunov

Faculty, Staff and Student Publications

Metabolic illnesses (MET) are detrimental to brain integrity and are common comorbidities in patients with mental illnesses, including major depressive disorder (MDD). We quantified effects of MET on standard regional brain morphometric measures from 3D brain MRI as well as diffusion MRI in a large sample of UK BioBank participants. The pattern of regional effect sizes of MET in non-psychiatric UKBB subjects was significantly correlated with the spatial profile of regional effects reported by the largest meta-analyses in MDD but not in bipolar disorder, schizophrenia or Alzheimer's disease. We used a regional vulnerability index (RVI) for MET (RVI-MET) to measure …

Molecular Disparity Of Hla-Dpb1 Is Associated With The Development Of Subsequent Solid Cancer After Allogeneic Hematopoietic Stem Cell Transplantation, Jun Zou, Piyanuch Kongtim, Betül Oran, Samer A Srour, Uri Greenbaum, Yudith Carmazzi, Gabriela Rondon, Stefan O Ciurea, Qing Ma, Elizabeth J Shpall, Richard E Champlin, Kai Cao

Faculty, Staff and Student Publications

Background: An increased incidence of subsequent solid cancers (SSCs) has been reported in long-term survivors of allogeneic hematopoietic stem cell transplantation (allo-HSCT), and SSC is associated with inferior mortality and morbidity. Previous studies showed that the incidence of SSC is significantly higher in those who underwent allo-HSCT from HLA-mismatched donors, suggesting that persistent alloimmunity may predispose patients to SSCs. It was recently reported that, in a cohort of patients who received allo-HSCT from an unrelated donor matched at HLA-A, -B, -C, -DRB1/3/4/5, and -DQB1 loci, HLA-DPB1 alloimmunity determined by high mismatched eplets (MEs) and Predicted Indirectly Recognizable HLA Epitopes (PIRCHE) …

Nuclear Export Signal Mutation Of Epidermal Growth Factor Receptor Enhances Malignant Phenotypes Of Cancer Cells, Lei Nie, Ying-Nai Wang, Jung-Mao Hsu, Junwei Hou, Yu-Yi Chu, Li-Chuan Chan, Longfei Huo, Yongkun Wei, Rong Deng, Jun Tang, Yi-Hsin Hsu, How-Wen Ko, Seung-Oe Lim, Kebin Huang, Mei-Kuang Chen, Tai-Jan Chiu, Chien-Chia Cheng, Yueh-Fu Fang, Chia-Wei Li, Aarthi Goverdhan, Hsing-Ju Wu, Cheng-Chung Lee, Wen-Ling Wang, Jennifer Hsu, Paul Chiao, Shao-Chun Wang, Mien-Chie Hung

Faculty, Staff and Student Publications

Nuclear epidermal growth factor receptor (EGFR) has been shown to be correlated with drug resistance and a poor prognosis in patients with cancer. Previously, we have identified a tripartite nuclear localization signal (NLS) within EGFR. To comprehensively determine the functions and underlying mechanism of nuclear EGFR and its clinical implications, we aimed to explore the nuclear export signal (NES) sequence of EGFR that is responsible for interacting with the exportins. We combined in silico prediction with site-directed mutagenesis approaches and identified a putative NES motif of EGFR, which is located in amino acid residues 736-749. Mutation at leucine 747 (L747) …

Ethnic-Specific Predictors Of Neurotoxicity Among Patients With Pediatric Acute Lymphoblastic Leukemia After High-Dose Methotrexate, Rachel D Harris, Melanie Brooke Bernhardt, Mark C Zobeck, Olga A Taylor, Maria Monica Gramatges, Eric S Schafer, Philip J Lupo, Karen R Rabin, Michael E Scheurer, Austin L Brown

Faculty, Staff and Students Publications

High-dose methotrexate (HD-MTX; 5,000 mg/m2) is an important component of curative therapy in many treatment regimens for high-risk pediatric acute lymphoblastic leukemia (ALL). However, methotrexate therapy can result in dose-limiting neurotoxicity which may disproportionately affect Latino children. Thus, we evaluated risk factors for neurotoxicity in an ethnically diverse population of 351 patients (58.1% Latino) who received 1,183 HD-MTX infusions. Overall, thirty-five patients (10%) experienced neurotoxicity, 71% of whom were Latino. After adjusting for clinical risk factors, we found that serum creatinine elevations ≥50% of baseline were associated with a 3-fold increased odds (OR = 3.32, 95% CI: 0.98-11.21, p=0.05) for …

Update On The Role Of Feno In Asthma Management, Neveda Murugesan, Damini Saxena, Arundhati Dileep, Muhammad Adrish, Nicola A Hanania

Faculty, Staff and Students Publications

Asthma is a heterogenous disorder characterized by presence of different phenotypes and endotypes. Up to 10% of the individuals suffer from severe asthma and are at increased risk of morbidity and mortality. Fractional exhaled nitric oxide (FeNO) is a cost-effective, point of care biomarker that is used to detect type 2 airway inflammation. Guidelines have proposed to measure FeNO as an adjunct to diagnostic evaluation in individuals with suspected asthma and to monitor airway inflammation. FeNO has lower sensitivity, suggesting that it may not be a good biomarker to rule out asthma. FeNO may also be used to predict response …

Ethnic Disparities In Childhood Leukemia Survival By Border Residence: A Texas Population-Based Analysis, Maria I Castellanos, Abiodun O Oluyomi, Tiffany M Chambers, Maria M Gramatges, Lena E Winestone, Philip J Lupo, Michael E Scheurer

Faculty, Staff and Students Publications

Background: The US-Mexico border is a medically underserved region where survival disparities have been observed in adults diagnosed and treated for various malignancies. Studies examining survival disparities among children living in this region and diagnosed with cancer are lacking. The objective of this study was to evaluate the impact of border residence on survival among children with acute lymphoblastic leukemia (ALL), acute myeloid leukemia (AML), and living near the Texas-Mexico border at the time of their diagnosis. The authors hypothesized that this group experiences inferior survival compared with patients with childhood leukemia living in nonborder areas.

Methods: The authors conducted …

Current Barriers To Eye Care, Annika Samuelson, Bs

inSIGHT

Barriers to care penetrate all aspects within our healthcare system and ophthalmology is no exception. The World Health Organization (WHO) estimates 2.2 billion people worldwide have vision impairment, half of which are due to preventable causes and/or remain untreated. In the United States, 6 million people are reported to have visual impairment and over one million people are blind.² The leading causes of blindness within the United States are macular degeneration, cataract, glaucoma, and diabetic retinopathy.³ Management of these diseases require access to early detection, therapeutic intervention, and follow up care at regular intervals; for example, nearly half …

Thyroid Eye Disease: Overview And Treatment, Michelle Omega, Ms

inSIGHT

Your immune system consists of a guided molecular army of antibodies equipped to recognize millions of foreign enemy antigens. However, in autoimmune conditions, antibodies are produced which target the cells of your own body. This is how many autoimmune diseases begin, including thyroid eye disease.

Ophthalminute Highlight: A Look Into The Popular, Educational One-Minute Videos, Anza Rizvi, Bs

inSIGHT

Ophthalminute is a series of one-minute videos designed to provide information on different, essential topics in ophthalmology. What separates the Ophthalminute videos from many of the other videos currently available is their unique ability to effectively and succinctly present information into a one-minute video to help viewers learn and better understand the fundamentals of ophthalmology. The videos showcase witty banter, enthusiastic energy, and stimulating visuals. Across YouTube, Twitter, and Instagram, Ophthalminute has received an astonishing over 2000 followers or subscribers and over 20,000 views!

Room To Wiggle, Holden Caplan, Bs

inSIGHT

Uveitis – inflammation of the inside of the eye and the fifth leading cause of vision loss in the USA. Uveitis (of which there are 30-40 types) may be infectious or non-infectious, unilateral or bilateral, of sudden onset or progressing over months to years, and present in any age group. Different etiologies cause different presentations, including both onset and location (front, middle, or back; Table 1) in the eye.

Exploring The Debate: Dmek And Dsek In Corneal Transplantation, Christian Raimondo, Bs

inSIGHT

Scientific progress is rarely a linear process. This notion is especially true as it pertains to the development of surgical techniques that have the potential to shape future clinical landscapes. Corneal transplantation is no exception. From the very first iterations of full corneal transplants performed in the 19th century to the highly nuanced endothelial procedures available today, corneal medicine has served — and continues to foster — an academic arena where research discoveries and surgical innovations come together to advance the field.

Review Of Surgical Management For Closed-Angle Glaucoma, Scott Kozarsky, Ba

inSIGHT

Closed-angle glaucoma, also known as angle-closure glaucoma, is one of the major types of glaucoma. Glaucoma is a term used to describe a broad group of ocular diseases that damage the optic nerve. The type of angle closure with which the patient presents, whether acute, subacute, or chronic, will dictate their treatment. Management of these three presentations will be discussed at length later in this article. In the United States, closed-angle glaucoma is less common than open-angle glaucoma, which often has a gradual onset of intraocular pressure (IOP) elevation and optic nerve damage.

Age-Related Macular Degeneration And Emerging Treatments – With Advice From Dr. Ajay Kuriyan On Balancing Research With Clinical Responsibilities, Charles Deyoung, Ba

inSIGHT

Age-related macular degeneration (AMD) is a chronic disease of the central retina and a leading cause of vision loss worldwide. Although the early stages of AMD may present asymptomatically, the disease may progress and lead to severe visual impairment via geographic atrophy (“late dry”) or neovascular (“wet”) AMD. In geographic atrophy (GA), there is progressive atrophy of the retinal pigment epithelium (RPE), choriocapillaris, and photoreceptors due to lipofuscin (Drusen) accumulation between the RPE and Bruch’s membrane.¹ These Drusen deposits grow and create an inflammatory and metabolically dysfunctional environment for the photoreceptors supplying the macula (Figure 1).² Eventually, the …

Insight, Volume 3, Issue 1, 2023

inSIGHT

Contents

8 - Age-Related Macular Degeneration and Emerging Treatments
By Charles F. DeYoung

13 - Review of Surgical Management for Closed-Angle Glaucoma
By Scott C. Kozarsky

18 - Exploring the Debate: DMEK and DSEK in Corneal Transplantation
By Christian Raimondo

23 - Room to Wiggle
By Holden Caplan

30 - Ophthalminute Highlight
By Anza Rizvi

34 - Thyroid Eye Disease: Overview and Treatment
By Michelle Omega

38 - Current Barriers to Eye Care
By Annika G. Samuelson

Seeing Eye To Eye: An Overview Of Strabismus And Approach To Treatment, Shreya Swaminathan, Bs

inSIGHT

Strabismus is a heterogenous group of conditions characterized by the misalignment of the eyes. It may manifest as constant or intermittent deviation, meaning the eyes sometimes appear well aligned, or straight, and sometimes appear misaligned. Vision can be normal in some patients, but when associated with amblyopia, may be decreased vision in one eye. There is sometimes diminished binocular vision, with decreased depth perception.

A Look Into Oculoplastics: Repairing Lower Eyelid Defects From Carcinomas, Cameron Haghshenas, Bs

inSIGHT

Eyelids are the thinnest, most sensitive skin we have and can easily be damaged by sun exposure. This is evident given that 5 - 10% of all skin cancers occur on the eyelid, and over half of these occur on the lower eyelid¹. Most of such cases are basal cell carcinomas, which are slow-growing cancers that arise from the basal cell layer, the deepest part of the epidermis. If left untreated or improperly treated, these tumors can extend into adjacent tissues and bone, or recur. Squamous cell carcinomas can also occur on the lower eyelid, although they represent …

Manual Small-Incision Cataract Surgery, Ankur Nahar, Bs

inSIGHT

Of the 49 million people living with blindness worldwide, 15.2 million are blind due to cataracts, making it the leading cause of preventable blindness.^1,2 Furthermore, 65.2 million people experience moderate to severe vision impairment from cataracts, according to the World Report on Vision published by the World Health Organization (WHO).³ While global cataract surgery efforts have been a major success over the past three decades, an aging population has resulted in a rapid rise in cataracts, primarily in low- and middle-income countries (LMICs).^2,4 To address the increasing demand for cataract treatment, countries must perform an equal or …

Gatt: A Micro-Invasive Glaucoma Surgery And A Big Step For Glaucoma Treatment, Mose Im, Bs

inSIGHT

Glaucoma is a group of ocular diseases characterized by damage to the optic nerve that may lead to permanent vision loss. Currently, 76 million people (aged 40-80 years) suffer from glaucoma, and the prevalence is projected to increase to 111.8 million by 2040.¹ The diagnosis of glaucoma can be frightening, particularly because there is no known cure. Fortunately, recent advancements in glaucoma surgery have made more options available for patients presenting with new-onset glaucoma. In particular, patients with mild to moderate glaucoma may be eligible for newer minimally invasive glaucoma surgeries (MIGS). This review is both an overview of …

Origins Of The Wills Eye Manual: Surviving The Test Of Time, Jordan Safran, Bs

inSIGHT

The first copy of the Wills Eye Manual hit the press in late 1989; it featured a black cover page with bold gold lettering and the Wills Eye logo proudly displayed on top. Published in a time before the invention of the world wide web or the advent of digital printing, this 450-page expertly sourced ocular disease reference guide took the ophthalmology world by storm. Since its debut, the manual has served as the go-to guide for trainees and seasoned physicians alike in diagnosing and treating more than 200 ocular diseases. To date, the Wills Eye Manual has published eight …

A Day In The Life In The Wills Er, Samara Hamou, Ms1

inSIGHT

The Wills Eye Hospital — among the greatest eye hospitals in the country — is a force to be reckoned with. Located in Center City Philadelphia, the eight-story tall brick facility will capture your attention as you stroll down Walnut Street. The entrance to the Wills Eye Emergency Room (ER), however, is less apparent to the average city-goer. Located directly across from the Hospital, the red and blue entrance sign may go unnoticed to the unsuspecting by passer. However, for those who require expert eye care in a timely fashion, the Eye Emergency Room is a signal for the invaluable …

Neuro-Ophthalmology Subspecialty Highlight: With Dr. Sarah Thornton, Wills Eye Hospital, Joseph D. Desimone, Bs

inSIGHT

Neuro-Ophthalmology is a subspecialty within ophthalmology that combines the complexities of nervous system disease with the intricacies of the ocular manifestations of those diseases. Neuro-ophthalmologists work closely with neurologists, neurosurgeons, rheumatologists, and other ophthalmologists in different subspecialties, such as retina and glaucoma, to get to the source of their patients’ problems. Neuro-ophthalmology is typically a 1-year fellowship undertaken after residency training is completed, where physicians will learn the complex ways different diseases can manifest in the eye.

A New Dimension To Offer, Ari August, Bs

inSIGHT

Technological advancements are crafted, fielded, and sold from the vantage point of benefit: How can this make my life better? The origins of three-dimensional (3D) technology are no different. 3D technology targets the mind’s ability to make sense of two different angles of an image, and therefore perceive depth. Earlier models, common in movie theaters and cereal box toys, utilized red and blue lenses to outwit one’s perception of a flat image and project it into 3D images, promising deeper immersive experiences and even “x-ray vision.” More recently, the capacity of 3D technology has expanded, as seen with the recent …

Longitudinal Variations In Antibody Responses Against Sars-Cov-2 Spike Epitopes Upon Serial Vaccinations, Dicle Yalcin, Sydney J. Bennett, Jared Sheehan, Amber J. Trauth, For Yue Tso, John T. West, Michael E. Hagensee, Alistair J. Ramsay, Charles Wood

LSU-LCMC Cancer Center Faculty Publications

The COVID-19 pandemic caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) impacted healthcare, the workforce, and worldwide socioeconomics. Multi-dose mono- or bivalent mRNA vaccine regimens have shown high efficacy in protection against SARS-CoV-2 and its emerging variants with varying degrees of efficacy. Amino acid changes, primarily in the receptor-binding domain (RBD), result in selection for viral infectivity, disease severity, and immune evasion. Therefore, many studies have centered around neutralizing antibodies that target the RBD and their generation achieved through infection or vaccination. Here, we conducted a unique longitudinal study, analyzing the effects of a three-dose mRNA vaccine regimen …

Covid-19 Related Biliary Injury: A Review Of Recent Literature, Sujani Yadlapati, Simone A. Jarrett, Daniel Baik, Adib Chaaya

COVID-19 Papers, Posters, and Presentations

Since its emergence in 2019, it has become apparent that coronavirus 2019 (COVID-19) infection can result in multi systemic involvement. In addition to pulmonary symptoms, hepatobiliary involvement has been widely reported. Extent of hepatic involvement ranges from minor elevation in liver function tests (LFTs) to significant hepatocellular or cholestatic injury. In majority of cases, resolution of hepatic injury or improvement in LFTs is noted as patients recover from COVID-19 infection. However, severe biliary tract injury progressing to liver failure has been reported in patients requiring prolonged intensive care unit stay or mechanical ventilation. Due to the timing of its presentation, …

Met Alterations Are Associated With Osimertinib Resistance In Egfr Mutant Lung Cancers, A Meta-Analysis, Annie Le, Marissa Viola, Jun Wang

Research Day

Osimertinib is a third-generation tyrosine kinase inhibitor (TKI) that has been used to treat EGFR mutant lung cancers, especially those with EGFR T790M mutation. Resistance to osimertinib is likely associated with acquired genetic alterations in these cancer cells. Mesenchymal epithelial transition (MET) is a tyrosine kinase and its amplification is frequently seen in osimertinib resistant patients. To investigate whether the presence of MET alteration is associated with osimertinib resistance, a meta-analysis was conducted using published observations of EGFR mutant lung cancer patients treated with osimertinib. Frequencies of MET alterations are variable, ranging from 0-43% in osimertinib resistant patients. MET alteration …

Mechanisms Of Chromosomal Instability (Cin) Tolerance In Aggressive Tumors: Surviving The Genomic Chaos, Brittiny Dhital, Veronica Rodriguez-Bravo

Student Papers, Posters & Projects

Chromosomal instability (CIN) is a pervasive feature of human cancers involved in tumor initiation and progression and which is found elevated in metastatic stages. CIN can provide survival and adaptation advantages to human cancers. However, too much of a good thing may come at a high cost for tumor cells as excessive degree of CIN-induced chromosomal aberrations can be detrimental for cancer cell survival and proliferation. Thus, aggressive tumors adapt to cope with ongoing CIN and most likely develop unique susceptibilities that can be their Achilles' heel. Determining the differences between the tumor-promoting and tumor-suppressing effects of CIN at the …

Serinc5 Restricts Hiv Membrane Fusion By Altering Lipid Order And Heterogeneity In The Viral Membrane, Amanda E Ward, Daria Sokovikova, Melvin Neal Waxham, Frederick A Heberle, Ilya Levental, Kandice R Levental, Volker Kiessling, Judith M White, Lukas K Tamm

Faculty, Staff and Student Publications

The host restriction factor, Serinc5, incorporates into budding HIV particles and inhibits their infection by an incompletely understood mechanism. We have previously reported that Serinc5 but not its paralogue, Serinc2, blocks HIV cell entry by membrane fusion, specifically by inhibiting fusion pore formation and dilation. A body of work suggests that Serinc5 may alter the conformation and clustering of the HIV fusion protein, Env. To contribute an additional perspective to the developing model of Serinc5 restriction, we assessed Serinc2 and Serinc5's effects on HIV pseudoviral membranes. By measuring pseudoviral membrane thickness via cryo-electron microscopy and order via the fluorescent dye, …