Medicine and Health Sciences Commons^™

Hypoxia-Adenosine Axis As Therapeutic Targets For Acute Respiratory Distress Syndrome, Katherine Figarella, Jieun Kim, Wei Ruan, Tingting Mills, Holger Klaus Eltzschig, Xiaoyi Yuan

Journal Articles

The human respiratory and circulatory systems collaborate intricately to ensure oxygen delivery to all cells, which is vital for ATP production and maintaining physiological functions and structures. During limited oxygen availability, hypoxia-inducible factors (HIFs) are stabilized and play a fundamental role in maintaining cellular processes for hypoxia adaptation. First discovered during investigations of erythropoietin production regulation, HIFs influence physiological and pathological processes, including development, inflammation, wound healing, and cancer. HIFs promote extracellular adenosine signaling by enhancing adenosine generation and receptor signaling, representing an endogenous feedback mechanism that curbs excessive inflammation, supports injury resolution, and enhances hypoxia tolerance. This is especially …

Educating Staff Nurses On E-Cigarette And Vaping Associated Lung Injury, Dana Janette Imaoka

Walden Dissertations and Doctoral Studies

AbstractVaping product use has gained popularity since the first device was marketed in the early 2000s. Use among the adolescent and teen populations has grown steadily to the point of becoming an epidemic. As the largest group of healthcare professionals, nurses have the most contact with patients in healthcare settings and are in the position of providing care and education to them. The purpose of this doctoral project was to increase knowledge of vaping product use as well as the growing number of e-cigarette- and vaping-associated lung injuries (EVALI) in the United States. A gap was identified in nurses’ knowledge …

Synergistic Bleomycin Toxicity And Evali: A Lethal Combination, Daniel O'Connor, Nader Mina, Hira Iftikhar

Conference Presentation Abstracts

Introduction: Both vaping and bleomycin-based chemotherapy regimens are known risk factors for acute lung injury. Few, if any, cases are documented in the literature of these insults co-occurring. Case description: A 20-year-old male was diagnosed with Stage III testicular cancer in Autumn of 2020. He began BEP (bleomycin-etoposide-platinum), of which he completed three cycles before developing pulmonary sequelae. Social history was notable for marijuana use and vaping, including during his active chemotherapy, to help with cancer-related nausea, anxiety, and anorexia. Winter 2021, he visited the ED for dizziness, fatigue, and diarrhea, felt to be consistent with chemotherapy side effects, but …

Severe Covid-19 Is Characterized By An Impaired Type I Interferon Response And Elevated Levels Of Arginase Producing Granulocytic Myeloid Derived Suppressor Cells, Matthew J. Dean, Juan B. Ochoa, Maria Dulfary Sanchez-Pino, Jovanny Zabaleta, Jone Garai, Luis Del Valle, Dorota Wyczechowska, Lyndsey Buckner Baiamonte, Phaethon Philbrook, Rinku Majumder, Richard S. Vander Heide, Logan Dunkenberger, Ramesh Puttalingaiah Thylur, Bobby Nossaman, W. Mark Roberts, Andrew G. Chapple, Jiande Wu, Chindo Hicks, Jack Collins, Brian Luke

School of Medicine Faculty Publications

COVID-19 ranges from asymptomatic in 35% of cases to severe in 20% of patients. Differences in the type and degree of inflammation appear to determine the severity of the disease. Recent reports show an increase in circulating monocytic-myeloid-derived suppressor cells (M-MDSC) in severe COVID 19 that deplete arginine but are not associated with respiratory complications. Our data shows that differences in the type, function and transcriptome of granulocytic-MDSC (G-MDSC) may in part explain the severity COVID-19, in particular the association with pulmonary complications. Large infiltrates by Arginase 1+ G-MDSC (Arg+G-MDSC), expressing NOX-1 and NOX-2 (important for production of reactive oxygen …

Covid-19 Interactions With Angiotensin-Converting Enzyme 2 (Ace2) And The Kinin System; Looking At A Potential Treatment, Ramin Tolouian, Sepideh Zununi Vahed, Shahram Ghiyasvand, Audrey C. Tolouian, Mohammadreza Ardalan

Nursing Faculty Publications

The novel coronavirus disease 2019 (COVID-19) is a rapidly expanding infection around the world. The world Health Organization (WHO) in March 2020 announced the Coronavirus pandemic. This infection causes many deaths on daily basis. Therapeutic options are currently limited. It is revealed that COVID-19 binds to human angiotensin-converting enzyme 2 (ACE2) to enter the host cells. One of the activities of ACE2 is hydrolyzing the active bradykinin metabolite [des-Arg973] BK (DABK). A decreased activity or reducing expression of ACE2 by the virus impairs the inactivation of DABK. This enhances its signaling through the bradykinin B1 receptor (BKB1R) and could lead …

Search For The Cause Of Vaping Associated Lung Injury In Adolescents, Alexandra E. Krueger

All Graduate Theses, Dissertations, and Other Capstone Projects

In August 2019 an unexplained, exponential rise in severe respiratory illnesses in previously healthy young adults, swept across America catching the attention of medical providers. Hospital admissions for lung injury increased 10-fold over two months’ time leaving practitioners scrambling for answers. All affected patients were found to have used e-cigarettes prior to symptoms and endorsed using nicotine and marijuana vape pens. The medical community quickly began to search for the cause of these vaping associated lung injuries. Understanding the mechanism of injury is important in order to assist in educating the public about the risks associated with e-cigarettes. The aim …

The In Vivo Effects Of Alcohol In Lung And Liver Are At Least Partially Mediated Through The Alpha 4 Nicotinic Acetylcholine Receptor, J. Ritzenthaler, E. Torres-Gonzalez, G. E. Arteel, J. Roman

Division of Pulmonary and Critical Care Medicine Posters

Rational: Chronic alcohol abuse is a major risk factor for the development of acute lung injury, with 40% of annual cases in the U.S. linked to this disorder. Alcohol is not only associated with increased incidence of acute lung injury in at-risk individuals, but also increased mortality. The exact mechanisms by which alcohol abuse renders the host susceptible to acute lung injury remain poorly defined. We have reported that α4 nicotinic acetylcholine receptors (α4 nAChRs) may serve as potential sensors for alcohol in lung fibroblasts; however, we have not tested their role in vivo.

Methods: To test the role of …

Compressed Sensing For Few-View Multi-Pinhole Spect With Applications To Preclinical Imaging, Benjamin Michael Rizzo

Dissertations (1934 -)

Single Photon Emission Computed Tomography (SPECT) can be used to identify and quantify changes in molecular and cellular targets involved in disease. A radiopharmaceutical that targets a specific metabolic function is administered to a subject and planar projections are formed by imaging emissions at different view angles around the subject. The reconstruction task is to determine the distribution of radioactivity within the subject from the projections. We present a reconstruction approach that utilizes only a few view angles, resulting in a highly underdetermined system, which could be used for dynamic imaging applications designed to quantify physiologic processes altered with disease. …

Activation Of Invariant Natural Killer T Cells Redirects The Inflammatory Response In Neonatal Sepsis, A. C. Bolognese, W. Yang, L. W. Hansen, A. Sharma, J. M. Nicastro, G. F. Coppa, P. Wang

Journal Articles

No abstract provided.

Contribution Of Epithelial Hypoxia Signaling To Pulmonary Fibrosis: Role Of Fak1 And Galectin-1 As Driver Molecules, Jaymin J. Kathiriya

USF Tampa Graduate Theses and Dissertations

Idiopathic Pulmonary Fibrosis (IPF) is a deadly disease of unknown origin, which causes 80,000 deaths every year in the US and Europe combined. Unknown etiology and late diagnosis, combined with limited treatment options, contribute to a dismal survival rate of 3-5 years post diagnosis. Although molecular mechanisms underlying IPF pathogenesis and progression have been studied for over two decades, lack of in vivo models that recapitulate chronic, progressive, and irreversible nature of IPF have contributed to limited therapeutic success in clinical trials. Currently, only two drugs, Pirfenidone and Nintedanib, are approved for IPF treatment in the US, with their efficacy …

Adiponectin Protects Against Paraquat-Induced Lung Injury By Attenuating Oxidative/Nitrative Stress., Rong Yao, Yaxiong Zhou, Yarong He, Yaowen Jiang, Peng Liu, Lei Ye, Zhijie Zheng, Wayne Bond Lau, Yu Cao, Zhi Zeng

Department of Emergency Medicine Faculty Papers

The specific mechanisms underlying paraquat (PQ)-induced lung injury remain unknown, which limits understanding of its cytotoxic potential. Although oxidative stress has been established as an important mechanism underlying PQ toxicity, multiple antioxidants have proven ineffective in attenuating the deleterious effects of PQ. Adiponectin, which shows anti-oxidative and antinitrative effects, may have the potential to reduce PQ-mediated injury. The present study determined the protective action of globular domain adiponectin (gAd) on PQ-induced lung injury, and attempted to elucidate the underlying mechanism or mechanisms of action. BALB/c mice were administered PQ, with and without 12 or 36 h of gAd pre-treatment. The …

Tissue-Protective Effects Of Nkg2a In Immune-Mediated Clearance Of Virus Infection, Kenneth H. Ely, Mitsuo Matsuoka, Matthew P. Deberge, Jessica A. Ruby, Jun Liu, Mark J. Schneider, Yan Wang, Young S. Hahn, Richard I. Enelow

Dartmouth Scholarship

Virus infection triggers a CD8⁺ T cell response that aids in virus clearance, but also expresses effector functions that may result in tissue injury. CD8⁺ T cells express a variety of activating and inhibiting ligands, though regulation of the expression of inhibitory receptors is not well understood. The ligand for the inhibitory receptor, NKG2A, is the non-classical MHC-I molecule Qa1^b, which may also serve as a putative restricting element for the T cell receptors of purported regulatory CD8⁺ T cells. We have previously shown that Qa1^b-null mice suffer considerably enhanced immunopathologic lung injury …

Vitamin C As An Antioxidant: Evaluation Of Its Role On Pulmonary Contusion Experimental Model, Rana Sirmali, Zeynep Gi̇ni̇ş, Mehmet Sirmali, Okan Solak, Bengü Şeli̇man, Yetki̇n Ağaçkiran, Namik Deli̇baş

Turkish Journal of Medical Sciences

To analyze the protective activity of vitamin C on the lungs by assessing biochemical and histopathological analysis after performing an experimental isolated lung contusion model. Materials and methods: Fifty-four male Sprague-Dawley male rats were used. The rats were randomly separated into 4 groups. Vitamin C (200 mg/kg) was injected intraperitoneally 30 min after trauma. Blood samples were obtained for myeloperoxidase (MPO), glutathione peroxidase (GSH-Px), superoxide dismutase (SOD), and catalase (CAT) activities and malondialdehyde (MDA) levels. Blood gas analysis and bronchoalveolar lavage was performed. The lung tissue was also extracted for histopathological examination. Results: The lung contusion enhanced MDA, SOD, CAT, …

Acute Lung Injury/Acute Respiratory Distress Syndrome, Fazal Hameed Khan

Department of Anaesthesia

Reports of pulmonary physiopathological insults following severe trauma resulting in respiratory failure are not new in medical literature^1,2. In 1967 Ashbaugh and colleagues described a syndrome of acute respiratory distress following a variety of precipitating conditions³. Severe hypoxemia, diffuse pulmonary infiltrates, poor lung compliance and absence of left heart failure characterize this condition. Ashbaugh et al⁴ subsequently named it as adult respiratory distress syndrome to differentiate it from infant respiratory distress syndrome. It was proposed at that time that both conditions manifest similar physiopathological changes. It was also referred to as “traumatic wet lung”, “congestive …

Protective Effect Of Nitric Oxide In Lung Injury Associated With Cerulein-Induced Acute Pancreatitis, Abdulkadi̇r Bedi̇rli̇, Erdoğan M. Sözüer, Recep Saraymen, Nai̇l Ersöz, Eser Kiliç

Turkish Journal of Medical Sciences

The aim of this study was to investigate the role of NO in the pathogenesis of lung injury associated with pancreatitis, and the relation between malondialdehyde (MDA) and myeloperoxidase (MPO). Forty Wistar male rats were divided into control or pancreatitis groups, and treated with saline, L-arginine (100 mg/kg i.v.), NO donor, or N-nitro-L-arginine methyl ester (L-NAME) (10 mg/kg i.v.), an inhibitor of NO synthase. Pancreatitis was induced in rats intravenously via the administration of cerulein (10 µg/kg/h) for 4 h). Eight hours after the induction of acute pancreatitis (AP), amylase and lipase in plasma significantly increased in all animals in …