Digital Commons Network^™

Haemorrhagic Colitis Associated With Enterohaemorrhagic Escherichia Coli O165:H25 Infection In A Yearling Feedlot Heifer, Rodney A. Moxley, Zachary R. Stromberg, Gentry L. Lewis, John D. Loy, Bruce W. Brodersen, Isha R. Patel, Jayanthi Gangiredla

School of Veterinary and Biomedical Sciences: Faculty Publications

Introduction: Enterohaemorrhagic Escherichia coli (EHEC) cause haemorrhagic colitis and haemolytic uraemic syndrome in humans. Although EHEC infection typically results in haemorrhagic colitis in all ages of human patients, in cattle it is usually limited to 1- to 5-week-old nursing calves.

Case Presentation: A 1-year-old feedlot beef heifer was moribund with neurological signs and bloody diarrhoea. At necropsy, the colonic mucosa contained multiple grossly visible haemorrhagic erosions, each measuring <1 mm in diameter. Histologically, foci corresponding to the gross erosions had E. coli O165 antigen-positive bacterial rods adherent to the apical surfaces of degenerate and necrotic colonic mucosal epithelial cells in association with attaching and effacing lesions, and also within cytoplasmic vacuoles in …

Amla Enhances Autophagy And Modulates Beta Amyloid Metabolism In An In Vitro Model Of Alzheimer’S Disease, Elham Teimouri, Prashant Bharadwaj, Stephanie R. Rainey-Smith, Paul Fraser, Giuseppe Verdile, Ralph N. Martins

ECU Posters

Alzheimer’s disease (AD) is a progressive, fatal neurodegenerative disease characterized by extensive neuronal loss associated with increased accumulation of the beta amyloid (Aβ) protein. Reducing production, preventing aggregation and improving clearance of Aβare areas of active research in the development of therapeutic agents to ameliorate neurodegeneration in AD. The Indian plant amla (Emblicaofficinalis), commonly known as Indian gooseberry, has widely been utilized in traditional Ayurvedic medicine preparations in the treatment of a variety of disease conditions including cardiovascular disease and diabetes: accumulating evidence also suggests that amla may be beneficial in AD. Amla exhibits antioxidant, anti-inflammatory, and anti-apoptotic mechanisms and …

Esophageal Replacement By Hydroxylated Bacterial Cellulose Patch In A Rabbit Model, Changlai Zhu, Fang Liu, Wenbo Qian, Yingjie Wang, Qingsheng You, Tianyi Zhang, Feng Li

Turkish Journal of Medical Sciences

Background/aim: To repair esophageal defects by hydroxylated and kombucha -synthesized bacterial cellulose (HKBC) patch in a rabbit model. Materials and methods: Semicircular esophageal defects 1 cm in length of the cervical esophagus were initially created in 18 Japanese big-ear rabbits and then repaired with HKBC patch grafts. The clinical outcomes including survival rate, weight change, food intake, and hematological and radiologic evaluation were observed. After X-ray evaluation, the rabbits were sacrificed sequentially at 1, 3, and 6 months for histopathologic analysis with light microscopy and scanning electron microscopy. Results: Survival rate during the first month was 88.9% (n = 16). …

Age-Related Macular Degeneration And Alzheimer Disease, Eren Çerman, Muhsi̇n Eraslan, Osman Çeki̇ç

Turkish Journal of Medical Sciences

This review highlight the similarities in the pathogenesis between Alzheimer disease and age-related macular degeneration. All studies published between 1990 and 2014 were reviewed to identify the common pathological pathways. Alzheimer disease and age-related macular degeneration share common features such as vitronectin and amyloid-β accumulation, increased oxidative stress, and apolipoprotein and complement activation pathways, which are reviewed as histologic and immunologic common features.

Gastrointestinal System Lesions In Children Due To The Ingestion Of Alkali And Acid Corrosive Substances, Kaan Demi̇rören, Hali̇l Kocamaz, Yaşar Doğan

Turkish Journal of Medical Sciences

To examine esophageal and gastric lesions in children due to the ingestion of alkali and acid corrosive substances and to emphasize all related complications. Materials and methods: The reports of 103 children who ingested or were suspected to have ingested corrosive substances and who then underwent upper gastrointestinal endoscopic inspections were evaluated retrospectively. Results: Of the patients, the mean age was 41 ± 3.6 months, and 57.3% were male. Vomiting was the most common symptom (44.7%). Eighteen different commercial products were defined as corrosive substances: 59.2% of them were alkali, 39.8% were acids, and 1% had a neutral pH. These …

Hepatocyte Clock And Alcohol-Dependent Disruption In Glycogen Metabolism, Uduak Sunday Udoh

All ETDs from UAB

Chronic alcohol consumption has been shown to significantly decrease hepatic glycogen, an important storage form of energy for the body and liver. Emerging studies indicate a link between metabolism and the molecular circadian clock. Previously, we have shown that chronic alcohol consumption disrupts the liver molecular clock mechanism. However, it is not known how this alteration impacts hepatic energy (e.g., glycogen) metabolism and contributes to alcohol hepatotoxicity. This dissertation investigates the impact chronic alcohol consumption has on time-of-day-dependent oscillations of various aspects of liver glycogen metabolism, and the importance of the liver circadian clock in these metabolic alterations. Chapter 1: …

Obesity Weighs Down Memory: Emerging Insights Into The Epigentic Basis Of Obesity-Induced Memory Impairment In Adult Mice, Frankie Darryn Heyward

All ETDs from UAB

A preponderance of evidence has established that obesity contributes to memory impairments in mid-age adults. Empirical evidence has revealed that diet-induced obesity contributes to memory impairments in adult rodents. Precisely how obesity disrupts memory remains an open question. Bourgeoning data indicate that molecular epigenetic mechanisms mediate the changes in gene transcription that are necessary for hippocampus-dependent memory consolidation. Epigenetic mechanisms, such as DNA methylation, stably regulate gene expression without affecting the DNA sequence. Moreover, DNA methylation of memory-related genes with in the hippocampus is indispensible for memory formation. There is recent evidence of obesity-induced aberrantions in DNA methylation both peripherally …

Metabolic And Oxidative Regulation Of Neuronal Autophagy And Survival, Matthew Dodson

All ETDs from UAB

Neurodegenerative diseases, such as Parkinson's disease, Alzheimer's disease and Huntington's disease are all characterized by metabolic dysfunction, increased oxidative damage to proteins and organelles, formation of proteinaceous inclusions, decreased autophagic and proteasomal function, and eventual neuronal and glial cell death. While our understanding of the mechanisms that underlie many of these pathologies is constantly growing, their exact cause, onset, interplay and progression still remain unclear. The gap between the description of disease pathologies and understanding the fundamental mechanisms of disease pathogenesis, progression and potential therapeutics to mitigate disease progression is still large. Based on the observation that altered glucose utilization, …

The Alpha-Glucosidase Inhibitor Acarbose As A Calorie Restriction Mimetic To Modify Metabolic Outcomes In Mice, Rachel Ann Brewer

All ETDs from UAB

Age-related diseases continue to be a leading cause of death. One of the only replicable methods proven to decrease age-related morbidity and mortality in multiple species is calorie restriction (CR). CR is difficult for human populations to implement, and has a number of associated risks and side effects. A CR mimetic could provide the healthspan- and lifespan-extending benefits of CR without the limitations. Acarbose (ACA), an α-glucosidase and α-amylase inhibitor approved to treat type 2 diabetes in humans, was recently identified as able to extend lifespan in healthy mice. The purpose of this research was to determine the effects of …

Intestinal Microbiota And Its Role In Mucosal And Systemic Immune Responses, Qing Zhao

All ETDs from UAB

Host-microbiota mutualism is established with long-term co-evolution. The abundant and diverse microbes colonizing on the surface of the host’s body, especially those in the gastrointestinal (GI) tract, play an essential role in the development and maturation of the host’s immune system. Failure of intestinal microbial control may lead to the development of an array of autoimmune diseases, including inflammatory bowel disease (IBD). As a well-recognized inflammation mediator, Th17 cells are actually among the most abundant effector CD4+ T cells in the normal adult gut. What the role of intestinal Th17 cells is under steady state conditions and how the intestinal …

Faculty Publications 2014, Lsu Health Sciences Center New Orleans

Historical Faculty Publications

This Faculty bibliography contains 898 publications.

Regulation Of System XC- By Pharmacological Manipulation Of Cellular Thiols, Rebecca Albano, Nicholas J. Raddatz, Julie Hjelmhaug, David A. Baker, Doug Lobner

Biomedical Sciences Faculty Research and Publications

The cystine/glutamate exchanger (system x_c^-) mediates the transport of cystine into the cell in exchange for glutamate. By releasing glutamate, system x_c^- can potentially cause excitotoxicity. However, through providing cystine to the cell, it regulates the levels of cellular glutathione (GSH), the main endogenous intracellular antioxidant, and may protect cells against oxidative stress. We tested two different compounds that deplete primary cortical cultures containing both neurons and astrocytes of intracellular GSH, L-buthionine-sulfoximine (L-BSO), and diethyl maleate (DEM). Both compounds caused significant concentration and time dependent decreases in intracellular GSH levels. However; DEM caused an increase …

Pathophysiology And Metabolic Dysfunction Following Polytrauma, Robert Mackay Akscyn

All ETDs from UAB

Polytrauma, a combination of injuries to more than one body part or organ system, is common in modern warfare and in automobile and industrial accidents. The combination of injuries can include burn, fracture, hemorrhage, trauma to the extremities, and trauma to specific organ systems. These injuries are highly survivable when occurring singly. However, when they occur in combination the prognosis is worsened. To investigate the effects of combined injuries, we have developed a new and highly reproducible model of polytrauma. This model combines burn injury with soft tissue and gastrointestinal (GI) tract trauma. Male Sprague Dawley rats were subjected to …

Zebrafish Wnt9b Patterns The First Pharyngeal Arch Into D-I-V Domains And Promotes Anterior-Medial Outgrowth, Henry Jackson

All ETDs from UAB

The secondary mouth and its associated face and jaws were an important evolutionary adaptation in the vertebrate lineage. The secondary mouth is formed from facial prominences including the fronto-nasal prominence and the 1st pharyngeal-arch derived maxillary and mandibular prominence. Cranial neural crest cells within these prominences give rise to the connective tissues of face and jaws, and strict spatio-temporal regulation of cranial neural crest cell fate patterning and subsequent prominence outgrowth is vital to normal facial development. Oral-facial clefting (OFC) is a common morbid human birth disorder characterized by disrupted oral and craniofacial morphogenesis. Our previous studies demonstrate that a …

14-3-3 Proteins Regulate Mutant Lrrk2 Kinase Activity And Neurite Shortening, Nicholas Lavalley

All ETDs from UAB

Mutations in leucine-rich repeat kinase 2 (LRRK2) are the most common known cause of inherited Parkinson’s disease (PD), and LRRK2 is a risk factor for idiopathic PD. How LRRK2 function is regulated is not well understood. Recently, the highly-conserved 14-3-3 proteins, which play a key role in many cellular functions including cell death, have been shown to interact with LRRK2. In this study, we investigated whether 14-3-3s can regulate mutant LRRK2-induced neurite shortening and kinase activity. In the presence of 14-3-3θ overexpression, neurite length of primary neurons from BAC transgenic G2019S-LRRK2 mice returned back to wildtype levels. Similarly, 14-3-3θ overexpression …

Nonsense Suppression In A Cftr Mouse Model And Analysis Of Animo Acids Inserted At Cftr Premature Termination Codons In Mammalian Cells, Xiaojiao Xue

All ETDs from UAB

A nonsense mutation introduces a premature terminations codon (PTC) into an open reading frame (ORF) upstream of a normal stop codon and results in truncated protein production. In frame PTCs account for ~11% of all mutations that cause human genetic diseases. To treat PTC-associated disorders, one approach is to use drugs that facilitate the insertion of amino acids carried by near-cognate aminoacyl-tRNAs at PTCs. Aminoglycosides were shown to suppress nonsense mutations and restore full-length protein production. This process is also termed as readthrough. However, their low efficiency and their potential to induce ototoxicity and nephrotoxicity limits their long-term application for …

Functional Role Of Mepe In Tooth Mineralization: Mediation By Tgf-Beta1, Angela Gullard

All ETDs from UAB

Transforming growth factor-β1 (TGF-β1) is one of the most abundant cytokines of the dentin-pulp complex that regulates a broad range of biological processes related to matrix synthesis and ultimately tooth formation, including secretion and mineralization of the dentin extracellular matrix (DECM). TGF-β1 mediates odontoblast cytodifferentiation from precursor dental pulp cells, being up-regulated in odontoblasts and then incorporated into the DECM as a reservoir that can be utilized in times of mechanical, chemical, or bacterial insult. Formation of the DECM is modulated by the actions of small integrin-binding ligand N-linked glycoproteins (SIBLINGs), which include DMP-1, DSPP, BSP, SPP1, and MEPE, with …

Selenium Status In Blood, Urine, And Hair Samples Of Newly Diagnosed Pediatric Cancer Patients, Serap Karaman, Banu Mansuroğlu, Kadri̇ye Kizilbey, Serap Derman, Afi̇fe Bi̇nnaz Hazar

Turkish Journal of Medical Sciences

Background/aim: Selenium (Se) is a trace element that has multiple functions. Low Se amounts in serum and hair have been reported in pediatric and adult cancer patients. The aim of our study was to evaluate Se levels in the serum, urine, and hair of pediatric cancer patients with leukemia, lymphoma, and solid tumors when compared with healthy children. Materials and methods: The concentrations of Se in the serum, hair, and urine of 32 Turkish children as healthy controls and 88 Turkish children diagnosed with acute leukemia (58), lymphoma (16), and solid tumors (14) were measured using inductively coupled plasma mass …

R990g Polymorphism Of Calcium Sensing Receptor Gene Is Associated With High Parathyroid Hormone Levels In Subjects With Vitamin D Deficiency: A Cross-Sectional Study, Hafsa Majid, Aysha Habib Khan, Tariq Moatter

Department of Pathology and Laboratory Medicine

Single nucleotide polymorphisms (SNPs), R990G and A986S of the calcium sensing receptor (CaSR) gene, are shown to influence response of parathyroid hormone (PTH) in subjects with optimal vitamin D levels. This cross-sectional study was conducted in subjects with vitaminDdeficiency (VDD) to observe association’s betweenCaSR polymorphisms, plasma iPTH, and serumcalcium levels. Adult females (𝑛 = 140) with known VDD, intact parathyroid hormone (iPTH), and calcium levels were recruited for genotype analysis.The frequencies of the 986 alleles GG, GT, and TT were 68%, 25%, and 7%, respectively, whereas the frequencies of the 990 alleles AA, AG, and GG were 80%, 8.9%, and …

Strategies For Preventing Age And Neurodegenerative Disease-Associated Mitochondrial Dysfunction, Vedad Delic

USF Tampa Graduate Theses and Dissertations

Mitochondrial dysfunction plays a pivotal role in the development of aging phenotypes and aging-associated neurodegenerative disorders, such as Alzheimer’s disease (AD), Parkinson’s disease (PD) and Amyotrophic lateral sclerosis (ALS). Strategies that restore mitochondrial dysfunction may rescue the deficits of central metabolism in these disorders and improve cell survival. For example, we found that modulating the mTOR signaling pathway in a tissue culture model of aging-induced mitochondrial DNA mutation enhanced mitochondrial function as evidenced by increased oxygen consumption. Our previous melatonin studies also led us to hypothesize that caloric restriction and the hormone melatonin would reverse brain mitochondrial dysfunction in animal …

Neuroinflammatory Alterations Via Cd-36 In Traumatic Brain Injury, Diana G. Hernandez-Ontiveros

USF Tampa Graduate Theses and Dissertations

Traumatic brain injury (TBI) has become an increasingly unmet clinical need due to intense military conflicts worldwide. Directly impacted brain cells suffer massive death, with neighboring cells succumbing to progressive neurodegeneration accompanied by inflammatory and other secondary cell death events. Subsequent neurodegenerative events may extend to normal areas beyond the core of injury, thereby exacerbating the central nervous system’s inflammatory response to TBI. Recently CD-36 (cluster of differentiation 36/fatty acid translocase (FAT), a class B scavenger receptor of modified low-density lipoproteins (mLDLs) in macrophages, has been implicated in lipid metabolism, atherosclerosis, oxidative stress, and tissue injury in cerebral ischemia, and …

Utilization Of Placebo Response In Double-Blind Psychopharmacological Studies, Contextual Perspective, Margarita Olegovna Ashirova

Antioch University Dissertations & Theses

Placebo response has been an elusive phenomenon in the fields of medicine, medical research, and psychology. Even though it has been heavily utilized as a comparator treatment in double-blind psychopharmacological studies, the reliable definition and consistent understanding of placebo response are missing. In this contextual exploration, I outlined the state of current placebo response research and variable rates of placebo response reported in double-blind studies. I identified the gap in the literature—lack of consistent understanding of placebo response—that has led to a waste of resources by the psychopharmacological research industry. Further, I compared and contrasted the current inconsistent Western medical …

The Metabolism Of Alcohol: Risk And Protective Factors, Sydney E. Levan, Amy Adkins, Danielle Dick, Karen G. Chartier

UROP Posters

Purpose: Abstract for poster submission to VCU Poster Symposium for

Undergraduate Research and Creativity

Title: The Metabolism of Alcohol: Risk and Protective Factors

Background: In 2002, it was reported by the National Institutes of Health that

60.3% of college aged students (18-22) drank alcohol in the past month of being

asked, as compared to 51.9% of those not in college. They also found that 20% of

college students met the criteria for at least one alcohol use disorder (AUDs)1.

Many genes have been linked to an increased risk for AUDs and how individuals

with various ethnic backgrounds respond to alcohol. …

Liver Perilipin 5 Expression Worsens Hepatosteatosis But Not Insulin Resistance In High Fat-Fed Mice, Michelle B. Trevino, David Mazur-Hart, Yui Machida, Timothy King, Joseph Nadler, Elena V. Galkina, Arjun Poddar, Sucharita Dutta, Yumi Imai

Mathematics & Statistics Faculty Publications

Perilipin 5 (PLIN5) is a lipid droplet (LD) protein highly expressed in oxidative tissues, including the fasted liver. However, its expression also increases in nonalcoholic fatty liver. To determine whether PLIN5 regulates metabolic phenotypes of hepatosteatosis under nutritional excess, liver targeted overexpression of PLIN5 was achieved using adenoviral vector (Ad-PLIN5) in male C57BL/6J mice fed high-fat diet. Mice treated with adenovirus expressing green fluorescent protein (GFP) (Ad-GFP) served as control. Ad-PLIN5 livers increased LD in the liver section, and liquid chromatography with tandem mass spectrometry revealed increases in lipid classes associated with LD, including triacylglycerol, cholesterol ester, and phospholipid classes, …

Shared Genetic Variance Between Obesity And White Matter Integrity In Mexican Americans, Elena A. Spieker, Peter Kochunov, Laura M. Rowland, Emma Sprooten, Anderson M. Winkler, Rene L. Olvera, Laura Almasy, Ravi Duggirala, Peter T. Fox, John Blangero, David C. Glahn, Joanne E. Curran

School of Medicine Publications

Obesity is a chronic metabolic disorder that may also lead to reduced white matter integrity, potentially due to shared genetic risk factors. Genetic correlation analyses were conducted in a large cohort of Mexican American families in San Antonio (N = 761, 58% females, ages 18–81 years; 41.3 ± 14.5) from the Genetics of Brain Structure and Function Study. Shared genetic variance was calculated between measures of adiposity [(body mass index (BMI; kg/m2) and waist circumference (WC; in)] and whole-brain and regional measurements of cerebral white matter integrity (fractional anisotropy). Whole-brain average and regional fractional anisotropy values for 10 major …

Inverse Relationship Between Physical Activity, Adiposity And Arterial Stiffness In Healthy Middle-Aged Subjects, Oscar Mac Ananey, B Mc Loughlin, A Leonard, L Maher, P Gaffney, G Boran, V Maher

Articles

BACKGROUND:

Several obesity related factors are reported to exacerbate premature arterial stiffening, including inactivity and metabolic disarray. The aim of the present study was to investigate the relationship between physical activity, arterial stiffness and adiposity using objective methods. To further explore the role of adiposity in this complex process, obesity associated anthropometric and humoral biomarkers were measured.

METHODS:

Seventy-nine healthy, lifelong non-smoking, subjects were recruited. Habitual physical activity was measured using accelerometry. Arterial stiffness (augmentation index; AIx & pulse wave velocity; PWV), was measured using tonometry. Body composition was estimated using bioimpedence. Adipose associated biomarkers, leptin and adiponectin, were also …

Cd151-Α3Β1 Integrin Complexes Suppress Ovarian Tumor Growth By Repressing Slug-Mediated Emt And Canonical Wnt Signaling, Lauren A. Baldwin, John T. Hoff, Jason Lefringhouse, Michael Zhang, Changhe Jia, Zeyi Liu, Sonia Erfani, Hongyan Jin, Mei Xu, Qing-Bai She, John R. Van Nagell Jr., Chi Wang, Li Chen, Rina Plattner, David M. Kaetzel, Jia Luo, Michael Lu, Dava West, Chunming Liu, Fred R. Ueland, Ronny Drapkin, Binhua P. Zhou, Xiuwei H. Yang

Pharmacology and Nutritional Sciences Faculty Publications

Human ovarian cancer is diagnosed in the late, metastatic stages but the underlying mechanisms remain poorly understood. We report a surprising functional link between CD151-α3β1 integrin complexes and the malignancy of serous-type ovarian cancer. Analyses of clinical specimens indicate that CD151 expression is significantly reduced or diminished in 90% of metastatic lesions, while it remains detectable in 58% of primary tumors. These observations suggest a putative tumor-suppressing role of CD151 in ovarian cancer. Indeed, our analyses show that knocking down CD151 or α3 integrin enhances tumor cell proliferation, growth and ascites production in nude mice. These changes are accompanied by …

A Critical Analysis Of Infant Mortality In Kalamazoo County, Audrey Jensen

Honors Theses

The following is a review of the state of infant and fetal health in Kalamazoo County in the 21st century. Since infant health is a marker for the effectiveness of health care, this review will analyze the leading causes of infant mortality in Kalamazoo County. Statistical indicators show that Kalamazoo County falls below both state and national IMR averages. The leading causes of infant mortality in Kalamazoo are considered preventable infant deaths. Therefore, this review will make recommendations for the reduction of IMR through the improvement of preventative prenatal healthcare practices.

Saturated Free Fatty Acids Induce Cholangiocyte Lipoapoptosis, Sathish Kumar Natarajan, Sally A. Ingham, Ashley M. Mohr, Cody J. Wehrkamp, Anuttoma Ray, Sohini Roy, Sophie C. Cazanave, Mary A. Smith, Justin L. Mott

Journal Articles: Biochemistry & Molecular Biology

Recent studies have identified a cholestatic variant of nonalcoholic fatty liver disease (NAFLD) with portal inflammation and ductular reaction. Based on reports of biliary damage, as well as increased circulating free fatty acids (FFAs) in NAFLD, we hypothesized the involvement of cholangiocyte lipoapoptosis as a mechanism of cellular injury. Here, we demonstrate that the saturated FFAs palmitate and stearate induced robust and rapid cell death in cholangiocytes. Palmitate and stearate induced cholangiocyte lipoapoptosis in a concentration-dependent manner in multiple cholangiocyte-derived cell lines. The mechanism of lipoapoptosis relied on the activation of caspase 3/7 activity. There was also a significant up-regulation …

The Effects Of Conjugated Linoleic Acid Supplementation On Lipopolysaccharide-Challenged Synoviocytes, Allison Millican

All Theses

Osteoarthritis is one of the leading causes of lameness in the athletic horse. Cases of equine osteoarthritis typically present with synovitis, or inflammation of the synovium. This inflammation in the synovium leads to the production of inflammatory cytokines and eicosanoids. Although these downstream products can be beneficial, overproduction can lead to degradation of cartilage and joint disease. Opportunities to help mitigate or decrease inflammation within the joint are of current interest to the equine industry. One method being investigated is nutritional supplementation. The anti-inflammatory effects demonstrated by CLA supplementation make it a potential prospect for utilization in mitigating joint inflammation. …