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Articles 121 - 150 of 198
Full-Text Articles in Medical Physiology
The Association Of Circulating Amylin With Β-Amyloid In Familial Alzheimer's Disease, Han Gia Ly, Nirmal Verma, Savita Sharma, Deepak Kotiya, Sanda Despa, Erin L. Abner, Peter T. Nelson, Gregory A. Jicha, Donna M. Wilcock, Larry B. Goldstein, Rita Guerreiro, José Brás, Angela J. Hanson, Suzanne Craft, Andrew J. Murray, Geert Jan Biessels, Claire Troakes, Henrik Zetterberg, John Hardy, Tammaryn Lashley, Alzheimer’S Disease Exome Sequencing Group, Florin Despa
The Association Of Circulating Amylin With Β-Amyloid In Familial Alzheimer's Disease, Han Gia Ly, Nirmal Verma, Savita Sharma, Deepak Kotiya, Sanda Despa, Erin L. Abner, Peter T. Nelson, Gregory A. Jicha, Donna M. Wilcock, Larry B. Goldstein, Rita Guerreiro, José Brás, Angela J. Hanson, Suzanne Craft, Andrew J. Murray, Geert Jan Biessels, Claire Troakes, Henrik Zetterberg, John Hardy, Tammaryn Lashley, Alzheimer’S Disease Exome Sequencing Group, Florin Despa
Pharmacology and Nutritional Sciences Faculty Publications
Introduction
This study assessed the hypothesis that circulating human amylin (amyloid‐forming) cross‐seeds with amyloid beta (Aβ) in early Alzheimer's disease (AD).
Methods
Evidence of amylin‐AD pathology interaction was tested in brains of 31 familial AD mutation carriers and 20 cognitively unaffected individuals, in cerebrospinal fluid (CSF) (98 diseased and 117 control samples) and in genetic databases. For functional testing, we genetically manipulated amylin secretion in APP/PS1 and non‐APP/PS1 rats.
Results
Amylin‐Aβ cross‐seeding was identified in AD brains. High CSF amylin levels were associated with decreased CSF Aβ42 concentrations. AD risk and amylin gene are not correlated. Suppressed amylin secretion protected …
Deep Brain Stimulation Of The Subcallosal Cingulate Gyrus In The Treatment Of Treatment Resistant Depression, Megan Caravas, Melanie Sov
Deep Brain Stimulation Of The Subcallosal Cingulate Gyrus In The Treatment Of Treatment Resistant Depression, Megan Caravas, Melanie Sov
Physician Assistant Capstones, 2020-current
Objective: a systematic review to determine the efficacy of deep brain stimulation (DBS) targeting the subcallosal cingulate gyrus (SCG) for the treatment of treatment resistant depression (TRD). Methods: PubMed database was utilized in a search for clinical randomized control trials that were completed after the year 2000, using the terms deep brain stimulation, treatment resistant depression, and subcallosal cingulate gyrus. Results: Three clinical trials were chosen based on specific inclusion criteria as noted in the PRISMA flow chart (Chart 1). The results of the three articles showed various discrepancies. Two of the three studies demonstrated some statistical significance in reduction …
Oral Gavage Delivery Of Stable Isotope Tracer For In Vivo Metabolomics, Holden C. Williams, Margaret A. Piron, Grant K. Nation, Adeline E. Walsh, Lyndsay E. A. Young, Ramon C. Sun, Lance A. Johnson
Oral Gavage Delivery Of Stable Isotope Tracer For In Vivo Metabolomics, Holden C. Williams, Margaret A. Piron, Grant K. Nation, Adeline E. Walsh, Lyndsay E. A. Young, Ramon C. Sun, Lance A. Johnson
Sanders-Brown Center on Aging Faculty Publications
Stable isotope-resolved metabolomics (SIRM) is a powerful tool for understanding disease. Advances in SIRM techniques have improved isotopic delivery and expanded the workflow from exclusively in vitro applications to in vivo methodologies to study systemic metabolism. Here, we report a simple, minimally-invasive and cost-effective method of tracer delivery to study SIRM in vivo in laboratory mice. Following a brief fasting period, we orally administered a solution of [U-13C] glucose through a blunt gavage needle without anesthesia, at a physiological dose commonly used for glucose tolerance tests (2 g/kg bodyweight). We defined isotopic enrichment in plasma and tissue at …
Focal Cortical Dysplasia With Prolonged Ictal Asystole, A Case Report, Ahmad Wali, Fowzia Siddiqui
Focal Cortical Dysplasia With Prolonged Ictal Asystole, A Case Report, Ahmad Wali, Fowzia Siddiqui
Section of Neurology
Introduction: Cortical dysplasia carries significant morbidities such as seizures and delayed milestones. Focal cortical dysplasia (FCD) causes refractory epilepsy with various seizure types depending on the location and extent of the dysplasia. FCD in the temporal region and the insular cortex may cause ictal bradycardia (IB) and ictal asystole (IA). Video EEG (VEEG) with simultaneous EKG recording can better diagnose these cardiac abnormalities in FCD. We describe a case of refractory epilepsy. The patient's clinical seizures were usually followed by syncope. VEEG revealed frequent seizures some of which were associated with prolonged ictal asystole.
Results: A 15 years old female …
Plasma Resuscitation Attenuates Intestinal Barrier Disturbance Following Hemorrhagic Shock., Jessica E. Schucht
Plasma Resuscitation Attenuates Intestinal Barrier Disturbance Following Hemorrhagic Shock., Jessica E. Schucht
Electronic Theses and Dissertations
Background: Intestinal ischemia-reperfusion injury (IIRI) following resuscitated hemorrhagic shock (HS/RES) leads to endothelial damage, microcirculatory dysfunction and intestinal barrier breakdown, increasing intestinal permeability. This pathologic process contributes pathophysiology of multiple organ dysfunction syndrome (MODS) in some trauma patients. Although vascular smooth muscle machinery remains intact, microvascular vasoconstriction occurs secondary to endothelial cell damage, resulting in further ischemia and organ injury. Used separately, resuscitation with Fresh Frozen Plasma (FFP) or Direct Peritoneal Resuscitation (DPR) improves the intestinal microcirculation and alleviates organ injury. Further examination of these effects individually or combined could aid in the resuscitation of hemorrhagic shock. Methods: Sprague Dawley …
Corticotropin-Releasing Factor Infusion In The Bed Nucleus Of The Stria Terminalis Of Lactating Mice Alters Maternal Care And Induces Behavioural Phenotypes In Offspring, Kerstin Camile Creutzberg, Érika Kestering-Ferreira, Thiago Wendt Viola, Luis Eduardo Wearick-Silva, Rodrigo Orso, Bernardo Aguzzoli Heberle, Lucas Albrechet-Souza, Rosa Maria Martins De Almeida, Rodrigo Grassi-Oliveira
Corticotropin-Releasing Factor Infusion In The Bed Nucleus Of The Stria Terminalis Of Lactating Mice Alters Maternal Care And Induces Behavioural Phenotypes In Offspring, Kerstin Camile Creutzberg, Érika Kestering-Ferreira, Thiago Wendt Viola, Luis Eduardo Wearick-Silva, Rodrigo Orso, Bernardo Aguzzoli Heberle, Lucas Albrechet-Souza, Rosa Maria Martins De Almeida, Rodrigo Grassi-Oliveira
School of Medicine Faculty Publications
The peripartum period is accompanied by numerous physiological and behavioural adaptations organised by the maternal brain. These changes are essential for adequate expression of maternal behaviour, thereby ensuring proper development of the offspring. The corticotropin-releasing factor (CRF) plays a key role in a variety of behaviours accompanying stress, anxiety, and depression. There is also evidence that CRF contributes to maladaptations during the peripartum period. We investigated the effects of CRF in the bed nucleus of the stria terminalis (BNST) of lactating mice during maternal care and analysed locomotor activity and anxiety-like behaviour in the offspring. The BNST has been implicated …
Ace2 Mouse Models: A Toolbox For Cardiovascular And Pulmonary Research, Hongpeng Jia, Xinping Yue, Eric Lazartigues
Ace2 Mouse Models: A Toolbox For Cardiovascular And Pulmonary Research, Hongpeng Jia, Xinping Yue, Eric Lazartigues
School of Medicine Faculty Publications
Angiotensin-converting enzyme 2 (ACE2) has been identified as the host entry receptor for the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) responsible for the COVID-19 pandemic. ACE2 is a regulatory enzyme of the renin-angiotensin system and has protective functions in many cardiovascular, pulmonary and metabolic diseases. This review summarizes available murine models with systemic or organ-specific deletion of ACE2, or with overexpression of murine or human ACE2. The purpose of this review is to provide researchers with the genetic tools available for further understanding of ACE2 biology and for the investigation of ACE2 in the pathogenesis and treatment of COVID-19.
Liposomal Delivery Of Azithromycin Enhances Its Immunotherapeutic Efficacy And Reduces Toxicity In Myocardial Infarction, Ahmed Al-Darraji, Renée R. Donahue, Himi Tripathi, Hsuan Peng, Bryana M. Levitan, Lakshman Chelvarajan, Dalia Haydar, Erhe Gao, David Henson, John C. Gensel, David J. Feola, Vincent J. Venditto, Ahmed K. Abdel-Latif
Liposomal Delivery Of Azithromycin Enhances Its Immunotherapeutic Efficacy And Reduces Toxicity In Myocardial Infarction, Ahmed Al-Darraji, Renée R. Donahue, Himi Tripathi, Hsuan Peng, Bryana M. Levitan, Lakshman Chelvarajan, Dalia Haydar, Erhe Gao, David Henson, John C. Gensel, David J. Feola, Vincent J. Venditto, Ahmed K. Abdel-Latif
Gill Heart & Vascular Institute Faculty Publications
A growing body of evidence shows that altering the inflammatory response by alternative macrophage polarization is protective against complications related to acute myocardial infarction (MI). We have previously shown that oral azithromycin (AZM), initiated prior to MI, reduces inflammation and its negative sequelae on the myocardium. Here, we investigated the immunomodulatory role of a liposomal AZM formulation (L-AZM) in a clinically relevant model to enhance its therapeutic potency and avoid off-target effects. L-AZM (40 or 10 mg/kg, IV) was administered immediately post-MI and compared to free AZM (F-AZM). L-AZM reduced cardiac toxicity and associated mortality by 50% in mice. We …
Systematic Survey Of Creatinine-Based Versus Cystatin C-Based Estimated Gfr In People With Diabetes, Sadik Acaralp, Hossein Akhondi
Systematic Survey Of Creatinine-Based Versus Cystatin C-Based Estimated Gfr In People With Diabetes, Sadik Acaralp, Hossein Akhondi
HCA Healthcare Journal of Medicine
Background: Diabetes is a common cause of kidney failure, and most anti-diabetic agents are excreted through the kidneys. Therefore, it is critical to adjust medication dosage and anti-diabetic agents based on kidney function. There are different methods to estimate kidney function, but the common practice is to use creatinine to estimate the glomerular filtration rate.
Objective: In this systematic review, we identify and review publications in order to assess differences between creatinine-based and cystatin C-based estimated glomerular filtration rates in diabetic patients.
Method: The articles were identified using 3 databases and were assessed for eligibility. A total of 4 articles …
Therapeutic Trem2 Activation Ameliorates Amyloid-Beta Deposition And Improves Cognition In The 5xfad Model Of Amyloid Deposition, Brittani R. Price, Tiffany L. Sudduth, Erica M. Weekman, Sherika Johnson, Danielle Hawthorne, Abigail E. Woolums, Donna M. Wilcock
Therapeutic Trem2 Activation Ameliorates Amyloid-Beta Deposition And Improves Cognition In The 5xfad Model Of Amyloid Deposition, Brittani R. Price, Tiffany L. Sudduth, Erica M. Weekman, Sherika Johnson, Danielle Hawthorne, Abigail E. Woolums, Donna M. Wilcock
Sanders-Brown Center on Aging Faculty Publications
BACKGROUND: Triggering receptor expressed on myeloid cell-2 (TREM2) is a lipid and lipoprotein binding receptor expressed by cells of myeloid origin. Homozygous TREM2 mutations cause early onset progressive presenile dementia while heterozygous, point mutations triple the risk of Alzheimer's disease (AD). Although human genetic findings support the notion that loss of TREM2 function exacerbates neurodegeneration, it is not clear whether activation of TREM2 in a disease state would result in therapeutic benefits. To determine the viability of TREM2 activation as a therapeutic strategy, we sought to characterize an agonistic Trem2 antibody (AL002a) and test its efficacy and mechanism of action …
Glut1 Deficiency: Retinal Detrimental Effects Of Gliovascular Modulation, Matt Henry, John Kitchens, Juan M. Pascual, Ramiro S. Maldonado
Glut1 Deficiency: Retinal Detrimental Effects Of Gliovascular Modulation, Matt Henry, John Kitchens, Juan M. Pascual, Ramiro S. Maldonado
Ophthalmology and Visual Science Faculty Publications
No abstract provided.
Heart Failure In Humans Reduces Contractile Force In Myocardium From Both Ventricles, Cheavar A. Blair, Elizabeth A Brundage, Katherine L. Thompson, Arnold J. Stromberg, Maya Guglin, Brandon J Biesiadecki, Kenneth S. Campbell
Heart Failure In Humans Reduces Contractile Force In Myocardium From Both Ventricles, Cheavar A. Blair, Elizabeth A Brundage, Katherine L. Thompson, Arnold J. Stromberg, Maya Guglin, Brandon J Biesiadecki, Kenneth S. Campbell
Statistics Faculty Publications
This study measured how heart failure affects the contractile properties of the human myocardium from the left and right ventricles. The data showed that maximum force and maximum power were reduced by approximately 30% in multicellular preparations from both ventricles, possibly because of ventricular remodeling (e.g., cellular disarray and/or excess fibrosis). Heart failure increased the calcium (Ca2+) sensitivity of contraction in both ventricles, but the effect was bigger in right ventricular samples. The changes in Ca2+ sensitivity were associated with ventricle-specific changes in the phosphorylation of troponin I, which indicated that adrenergic stimulation might induce different effects …
In Vivo Evidence Of Exosome-Mediated Aβ Neurotoxicity, Ahmed Elsherbini, Haiyan Qin, Zhihui Zhu, Priyanka Tripathi, Simone M. Crivelli, Erhard Bieberich
In Vivo Evidence Of Exosome-Mediated Aβ Neurotoxicity, Ahmed Elsherbini, Haiyan Qin, Zhihui Zhu, Priyanka Tripathi, Simone M. Crivelli, Erhard Bieberich
Physiology Faculty Publications
No abstract provided.
Regulation Of Myofilament Contractile Function In Human Donor And Failing Hearts, Kerry S. Mcdonald, Laurin M. Hanft, Joel C. Robinett, Maya Guglin, Kenneth S. Campbell
Regulation Of Myofilament Contractile Function In Human Donor And Failing Hearts, Kerry S. Mcdonald, Laurin M. Hanft, Joel C. Robinett, Maya Guglin, Kenneth S. Campbell
Internal Medicine Faculty Publications
Heart failure (HF) often includes changes in myocardial contractile function. This study addressed the myofibrillar basis for contractile dysfunction in failing human myocardium. Regulation of contractile properties was measured in cardiac myocyte preparations isolated from frozen, left ventricular mid-wall biopsies of donor (n = 7) and failing human hearts (n = 8). Permeabilized cardiac myocyte preparations were attached between a force transducer and a position motor, and both the Ca2+ dependence and sarcomere length (SL) dependence of force, rate of force, loaded shortening, and power output were measured at 15 ± 1°C. The myocyte preparation size was …
Microrna-148a Regulates Low-Density Lipoprotein Metabolism By Repressing The (Pro)Renin Receptor, Na Wang, Lishu He, Hui Lin, Lunbo Tan, Yuan Sun, Xiaoying Zhang, A. H. Jan Danser, Hong S. Lu, Yongcheng He, Xifeng Lu
Microrna-148a Regulates Low-Density Lipoprotein Metabolism By Repressing The (Pro)Renin Receptor, Na Wang, Lishu He, Hui Lin, Lunbo Tan, Yuan Sun, Xiaoying Zhang, A. H. Jan Danser, Hong S. Lu, Yongcheng He, Xifeng Lu
Saha Cardiovascular Research Center Faculty Publications
High plasma LDL cholesterol (LDL-c) concentration is a major risk factor for atherosclerosis. Hepatic LDL receptor (LDLR) regulates LDL metabolism, and thereby plasma LDL-c concentration. Recently, we have identified the (pro)renin receptor [(P)RR] as a novel regulator of LDL metabolism, which regulates LDLR degradation and hence its protein abundance and activity. In silico analysis suggests that the (P)RR is a target of miR-148a. In this study we determined whether miR-148a could regulate LDL metabolism by regulating (P)RR expression in HepG2 and Huh7 cells. We found that miR-148a suppressed (P)RR expression by binding to the 3’-untranslated regions (3’-UTR) of the (P)RR …
Acute Disseminated Encephalomyelitis, Ashan Hatharasinghe, Hossein Akhondi, Don Pepito
Acute Disseminated Encephalomyelitis, Ashan Hatharasinghe, Hossein Akhondi, Don Pepito
HCA Healthcare Journal of Medicine
Introduction: Acute Disseminated Encephalomyelitis (ADEM) is a rare autoimmune demyelinating disorder of the central nervous system. Clinical manifestations include encephalopathy, motor deficits, ataxia, and meningeal signs. In most cases, ADEM is preceded by either vaccination or viral illness. Here, we present a case with neither of the two predisposing elements.
Discussion: A 28-year-old Hispanic female presenting with substance use and suicidal ideation was placed on an involuntary psychiatric hold, started on olanzapine and scheduled for a psychiatric facility transfer. The following day, she was noted to have neurological deficits when ambulating. Computed tomography of the brain showed a right frontal …
Association Of Aβ With Ceramide-Enriched Astrosomes Mediates Aβ Neurotoxicity, Ahmed Elsherbini, Alexander S. Kirov, Michael B. Dinkins, Guanghu Wang, Haiyan Qin, Zhihui Zhu, Priyanka Tripathi, Simone M. Crivelli, Erhard Bieberich
Association Of Aβ With Ceramide-Enriched Astrosomes Mediates Aβ Neurotoxicity, Ahmed Elsherbini, Alexander S. Kirov, Michael B. Dinkins, Guanghu Wang, Haiyan Qin, Zhihui Zhu, Priyanka Tripathi, Simone M. Crivelli, Erhard Bieberich
Physiology Faculty Publications
Amyloid-β (Aβ) associates with extracellular vesicles termed exosomes. It is not clear whether and how exosomes modulate Aβ neurotoxicity in Alzheimer's disease (AD). We show here that brain tissue and serum from the transgenic mouse model of familial AD (5xFAD) and serum from AD patients contains ceramide-enriched and astrocyte-derived exosomes (termed astrosomes) that are associated with Aβ. In Neuro-2a cells, primary cultured neurons, and human induced pluripotent stem cell-derived neurons, Aβ-associated astrosomes from 5xFAD mice and AD patient serum were specifically transported to mitochondria, induced mitochondrial clustering, and upregulated the fission protein Drp-1 at a concentration corresponding to 5 femtomoles …
Hierarchical Clustering Analyses Of Plasma Proteins In Subjects With Cardiovascular Risk Factors Identify Informative Subsets Based On Differential Levels Of Angiogenic And Inflammatory Biomarkers, Zachary Winder, Tiffany L. Sudduth, David W. Fardo, Qiang Cheng, Larry B. Goldstein, Peter T. Nelson, Frederick A. Schmitt, Gregory A. Jicha, Donna M. Wilcock
Hierarchical Clustering Analyses Of Plasma Proteins In Subjects With Cardiovascular Risk Factors Identify Informative Subsets Based On Differential Levels Of Angiogenic And Inflammatory Biomarkers, Zachary Winder, Tiffany L. Sudduth, David W. Fardo, Qiang Cheng, Larry B. Goldstein, Peter T. Nelson, Frederick A. Schmitt, Gregory A. Jicha, Donna M. Wilcock
Sanders-Brown Center on Aging Faculty Publications
Agglomerative hierarchical clustering analysis (HCA) is a commonly used unsupervised machine learning approach for identifying informative natural clusters of observations. HCA is performed by calculating a pairwise dissimilarity matrix and then clustering similar observations until all observations are grouped within a cluster. Verifying the empirical clusters produced by HCA is complex and not well studied in biomedical applications. Here, we demonstrate the comparability of a novel HCA technique with one that was used in previous biomedical applications while applying both techniques to plasma angiogenic (FGF, FLT, PIGF, Tie-2, VEGF, VEGF-D) and inflammatory (MMP1, MMP3, MMP9, IL8, TNFα) protein data to …
The Role Of Interleukin-18 In Myocardial Ischemia/Reperfusion, Yogesh Dhakal
The Role Of Interleukin-18 In Myocardial Ischemia/Reperfusion, Yogesh Dhakal
Theses and Dissertations
Acute Myocardial Infarction (AMI) is one of the leading causes of morbidity for cardiovascular diseases (CVDs) in the western world. While mortality rates for AMI has reduced in the last 20 years due to advancements in clinical interventions, patients who have an AMI are significantly more likely to develop heart failure (HF) in the following years. Reperfusion of the ischemic tissue is a necessary procedure to restore blood delivery to cardiomyocytes, minimize myocardial dysfunction, and reduce infarct size. Still, the step of reperfusion itself induces myocardial damage in a phenomenon known as reperfusion injury. Considering that the degree of myocardial …
Oral Contraceptives As Possible Acl Injury Prevention Method, Haley Schweizer
Oral Contraceptives As Possible Acl Injury Prevention Method, Haley Schweizer
Capstone Showcase
ABSTRACT
Introduction: Anterior Cruciate Ligament (ACL) injuries are an upsetting setback for many athletes that require a long and costly recovery process. The injury rates are four times greater in women than men. Preventative measures that help to prevent ACL injuries are limited to stretching and strengthening. Therefore, this review aims to investigate if oral contraceptive [I] usage provides a possible new avenue for prevention of ACL injury [O] in young female athletes (ages 18-30) [P] compared to those that do not take oral contraceptives [C].
Methods: A literature review was performed though PubMed, Google Scholar, SCOPUS Database, and ClinicalKey …
The Effects Of Nicotine And Cigarette Smoking On Cardiac Electrophysiology., Affan B. Irfan
The Effects Of Nicotine And Cigarette Smoking On Cardiac Electrophysiology., Affan B. Irfan
Electronic Theses and Dissertations
Cigarette smoking is a leading cause of preventable disease and premature death worldwide. The adverse effects of cigarette smoking, including proarrhythmia, are related to the mixture of chemicals, including nicotine (which sustains tobacco addiction). However, it remains unclear which individual tobacco smoke constituents and biological pathways mediate this increased risk. The purpose of this research was to explore the chronic effects of cigarette smoking, as well as compare the acute effects of nicotine and cigarette smoking, and the possible role of β-adrenoreceptors, on human cardiac electrophysiology. Chapter 1 is a comprehensive literature review of (a) the ex vivo and in …
White Matter Hyperintensity Regression: Comparison Of Brain Atrophy And Cognitive Profiles With Progression And Stable Groups, Omar M. Al-Janabi, Christopher E. Bauer, Larry B. Goldstein, Richard R. Murphy, Ahmed A. Bahrani, Charles D. Smith, Donna M. Wilcock, Brian T. Gold, Gregory A. Jicha
White Matter Hyperintensity Regression: Comparison Of Brain Atrophy And Cognitive Profiles With Progression And Stable Groups, Omar M. Al-Janabi, Christopher E. Bauer, Larry B. Goldstein, Richard R. Murphy, Ahmed A. Bahrani, Charles D. Smith, Donna M. Wilcock, Brian T. Gold, Gregory A. Jicha
Sanders-Brown Center on Aging Faculty Publications
Subcortical white matter hyperintensities (WMHs) in the aging population frequently represent vascular injury that may lead to cognitive impairment. WMH progression is well described, but the factors underlying WMH regression remain poorly understood. A sample of 351 participants from the Alzheimer’s Disease Neuroimaging Initiative 2 (ADNI2) was explored who had WMH volumetric quantification, structural brain measures, and cognitive measures (memory and executive function) at baseline and after approximately 2 years. Selected participants were categorized into three groups based on WMH change over time, including those that demonstrated regression (n = 96; 25.5%), stability (n = 72; 19.1%), and …
Technical Freediving: An Emerging Breath-Hold Diving Technique, Derek Covington, Robert H. Lee, Steven Toffel, Alberto Bursian, Kirk Krack, Chris Giordano
Technical Freediving: An Emerging Breath-Hold Diving Technique, Derek Covington, Robert H. Lee, Steven Toffel, Alberto Bursian, Kirk Krack, Chris Giordano
Journal of Human Performance in Extreme Environments
Technical freediving can be defined as freediving augmented by the use of oxygen-enriched gases or oxygen before, during, or after a freedive. As a result of these techniques, breath-hold divers can visit and enjoy underwater wrecks, reefs, and other diving locations previously located at depths unreachable to apnea divers. By pre-breathing oxygen-enriched gases in conjunction with hyperventilation—which decreases the partial pressure of carbon dioxide (PCO2)—the technical freediver now has additional oxygen to facilitate aerobic respiration during the dive. In addition, pre-breathing oxygen decreases tissue nitrogen tensions, which limits inert gas loading and decreases the risk of decompression sickness (DCS). Finally, …
Differential Iron Regulatory Genetics In 2d & 3d Culture Of Breast Cancer Cells, Tyler Hanna, Suzy Torti Ph. D, Frank Torti M.D., Mph, Nicole Farra Ph. D.
Differential Iron Regulatory Genetics In 2d & 3d Culture Of Breast Cancer Cells, Tyler Hanna, Suzy Torti Ph. D, Frank Torti M.D., Mph, Nicole Farra Ph. D.
Honors Scholar Theses
The iron regulatory axis has consistently been shown to be perturbed in cancer cell lines relative to non-cancerous cell lines. As cancer cells rapidly divide and grow, they require iron to fuel many intracellular processes, including DNA replication and protein synthesis. Three-dimensional cell culture is an increasingly popular method of culture that purportedly more accurately mimics the in vivo microenvironment of cancers over traditional two-dimensional culture. This project was prompted by previous lab results to investigate differential iron regulatory gene expression in 2D and 3D spheroid culture models. We replicated the findings that the gene hepcidin is induced in 3D …
Aortoduodenal Fistula Forms From Primary Aortic Stump Graft In A Two-Time Multi-Visceral Transplant Patient With Presentation Of Gastrointestinal Bleed And Bowel Perforation: A Case Report, Brielle Corrente
Graduate Student Research Symposium
Usually not diagnosed until open laparotomy, aortoduodenalfistulas (ADF) are one of the rarest complications of intestinal transplant surgery. With an incidence rate of only 0.04% at autopsy and only 250 documented cases since the early 1800’s, aortoduodenal fistulas are the most deadly complications of intestinal transplantation with a mortality rate of 100% without surgical intervention. A 39 year old, two-time multi-visceral transplant African American female patient suffered from a primary aortoduodenal fistula formation in a primary modified multi-visceral transplant aortic stump graft site. With emergency open laparotomy repair, revascularization of the secondary multi-visceral transplant was performed, saving the life of …
Initiation Of Action Potential In Murine Ventricular Myocytes By Bursts Of Nanosecond Pulses, Iurii Semenov
Initiation Of Action Potential In Murine Ventricular Myocytes By Bursts Of Nanosecond Pulses, Iurii Semenov
Bioelectrics Publications
[First slide] Current situation
I. Among 300,000 persons die from sudden cardiac arrest every year over 40% are victims of fibrillation
II. Defibrillation by an electric shock is the effective therapy against sudden cardiac death
III. Current approach to stop fibrillation may involve disruption of plasma membrane (PM) by an electroporation
IV. Electroporation is damaging, it can: I. Induce post shock arrhythmias II. Complicate patient's recovery III. Lead to death after initially successful resuscitation
Distinct White Matter Changes Associated With Cerebrospinal Fluid Amyloid-Β1-42 And Hypertension, Omar M. Al-Janabi, Christopher A. Brown, Ahmed A. Bahrani, Erin L. Abner, Justin M. Barber, Brian T. Gold, Larry B. Goldstein, Richard R. Murphy, Peter T. Nelson, Nathan F. Johnson, Leslie M. Shaw, Charles D. Smith, John Q. Trojanowski, Donna M. Wilcock, Gregory A. Jicha
Distinct White Matter Changes Associated With Cerebrospinal Fluid Amyloid-Β1-42 And Hypertension, Omar M. Al-Janabi, Christopher A. Brown, Ahmed A. Bahrani, Erin L. Abner, Justin M. Barber, Brian T. Gold, Larry B. Goldstein, Richard R. Murphy, Peter T. Nelson, Nathan F. Johnson, Leslie M. Shaw, Charles D. Smith, John Q. Trojanowski, Donna M. Wilcock, Gregory A. Jicha
Sanders-Brown Center on Aging Faculty Publications
BACKGROUND: Alzheimer's disease (AD) pathology and hypertension (HTN) are risk factors for development of white matter (WM) alterations and might be independently associated with these alterations in older adults.
OBJECTIVE: To evaluate the independent and synergistic effects of HTN and AD pathology on WM alterations.
METHODS: Clinical measures of cerebrovascular disease risk were collected from 62 participants in University of Kentucky Alzheimer's Disease Center studies who also had cerebrospinal fluid (CSF) sampling and MRI brain scans. CSF Aβ1-42 levels were measured as a marker of AD, and fluid-attenuated inversion recovery imaging and diffusion tensor imaging were obtained to assess …
Myocyte [Na+]I Dysregulation In Heart Failure And Diabetic Cardiomyopathy, Sanda Despa
Myocyte [Na+]I Dysregulation In Heart Failure And Diabetic Cardiomyopathy, Sanda Despa
Pharmacology and Nutritional Sciences Faculty Publications
By controlling the function of various sarcolemmal and mitochondrial ion transporters, intracellular Na+ concentration ([Na+]i) regulates Ca2+ cycling, electrical activity, the matching of energy supply and demand, and oxidative stress in cardiac myocytes. Thus, maintenance of myocyte Na+ homeostasis is vital for preserving the electrical and contractile activity of the heart. [Na+]i is set by the balance between the passive Na+ entry through numerous pathways and the pumping of Na+ out of the cell by the Na+/K+-ATPase. This equilibrium is perturbed in heart failure, …
Spinal Cord Trauma: An Overview Of Normal Structure And Function, Primary And Secondary Mechanisms Of Injury, And Emerging Treatment Modalities, Daniel Morin
Senior Honors Theses
The structures of the spinal cord and vertebral column are designed to provide flexibility, while still providing ample protection for the spinal cord deep within. While it does offer remarkable protection against most routine trauma, the spinal cord is still vulnerable to high-force etiologies of trauma and may become damaged as a result. These events are referred to as primary injury. Following the initial injury, the body’s own physiological responses cause a cascade of deleterious effects, known as secondary injury. Secondary injury is a major therapeutic target in mitigating the effects of spinal cord injury (SCI), and much research is …
The Mind-Body Problem; Three Equations And One Solution Represented By Immaterial-Material Data, Ion G. Motofei, David L. Rowland
The Mind-Body Problem; Three Equations And One Solution Represented By Immaterial-Material Data, Ion G. Motofei, David L. Rowland
Journal of Mind and Medical Sciences
Human life occurs within a complex bio-psycho-social milieu, a heterogeneous system that is integrated by multiple bidirectional interrelations existing between the abstract-intangible ideas and physical-chemical support of environment. The mind is thus placed between the abstract ideas/ concepts and neurobiological brain that is further connected to environment. In other words, the mind acts as an interface between the immaterial (abstract/ intangible) data and material (biological) support. The science is unable to conceives and explains an interaction between the immaterial and material domains (to understand nature of the mind), this question generating in literature the mind-body problem. We have published in …