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Epigenetic Impact Of Endocrine Disrupting Chemicals On Lipid Homeostasis And Atherosclerosis: A Pregnane X Receptor-Centric View, Robert N. Helsley, Changcheng Zhou Oct 2017

Epigenetic Impact Of Endocrine Disrupting Chemicals On Lipid Homeostasis And Atherosclerosis: A Pregnane X Receptor-Centric View, Robert N. Helsley, Changcheng Zhou

Pharmacology and Nutritional Sciences Faculty Publications

Despite the major advances in developing diagnostic techniques and effective treatments, atherosclerotic cardiovascular disease (CVD) is still the leading cause of mortality and morbidity worldwide. While considerable progress has been achieved to identify gene variations and environmental factors that contribute to CVD, much less is known about the role of “gene–environment interactions” in predisposing individuals to CVD. Our chemical environment has significantly changed in the last few decades, and there are more than 100,000 synthetic chemicals in the market. Recent large-scale human population studies have associated exposure to certain chemicals including many endocrine disrupting chemicals (EDCs) with increased CVD risk, …


Functional Neuroplasticity In The Nucleus Tractus Solitarius And Increased Risk Of Sudden Death In Mice With Acquired Temporal Lobe Epilepsy, Isabel D. Derera, Brian P. Delisle, Bret N. Smith Oct 2017

Functional Neuroplasticity In The Nucleus Tractus Solitarius And Increased Risk Of Sudden Death In Mice With Acquired Temporal Lobe Epilepsy, Isabel D. Derera, Brian P. Delisle, Bret N. Smith

Physiology Faculty Publications

Sudden unexpected death in epilepsy (SUDEP) is the leading cause of death in individuals with refractory acquired epilepsy. Cardiorespiratory failure is the most likely cause in most cases, and central autonomic dysfunction has been implicated as a contributing factor to SUDEP. Neurons of the nucleus tractus solitarius (NTS) in the brainstem vagal complex receive and integrate vagally mediated information regarding cardiorespiratory and other autonomic functions, and GABAergic inhibitory NTS neurons play an essential role in modulating autonomic output. We assessed the activity of GABAergic NTS neurons as a function of epilepsy development in the pilocarpine-induced status epilepticus (SE) model of …


Deletion Of The Nr4a Nuclear Receptor Nor1 In Hematopoietic Stem Cells Reduces Inflammation But Not Abdominal Aortic Aneurysm Formation, Hua Qing, Karrie L. Jones, Elizabeth B. Heywood, Hong Lu, Alan Daugherty, Dennis Bruemmer Oct 2017

Deletion Of The Nr4a Nuclear Receptor Nor1 In Hematopoietic Stem Cells Reduces Inflammation But Not Abdominal Aortic Aneurysm Formation, Hua Qing, Karrie L. Jones, Elizabeth B. Heywood, Hong Lu, Alan Daugherty, Dennis Bruemmer

Pharmacology and Nutritional Sciences Faculty Publications

Background: The NR4A3 orphan nuclear hormone receptor, NOR1, functions as a constitutively active transcription factor to regulate inflammation, proliferation, and cell survival during pathological vascular remodeling. Inflammatory processes represent key mechanisms leading to abdominal aortic aneurysm (AAA) formation. However, a role of NOR1 in AAA formation has not been investigated previously.

Methods: Inflammatory gene expression was analyzed in bone marrow-derived macrophages isolated from NOR1-deficient mice. Low-density lipoprotein receptor-deficient (LDLr−/−) mice were irradiated and reconstituted with hematopoietic stem cells obtained from NOR1−/− or wild-type littermate mice. Animals were infused with angiotensin II and fed a diet enriched in saturated …


Differentiation And Protective Capacity Of Virus-Specific Cd8, Vesselin T. Tomov, Olesya Palko, Chi Wai Lau, Ajinkya Pattekar, Yuhang Sun, Ralitza Tacheva, Bertram Bengsch, Sasikanth Manne, Gabriela L. Cosma, Laurence C. Eisenlohr, Timothy J. Nice, Herbert W. Virgin, E. John Wherry Oct 2017

Differentiation And Protective Capacity Of Virus-Specific Cd8, Vesselin T. Tomov, Olesya Palko, Chi Wai Lau, Ajinkya Pattekar, Yuhang Sun, Ralitza Tacheva, Bertram Bengsch, Sasikanth Manne, Gabriela L. Cosma, Laurence C. Eisenlohr, Timothy J. Nice, Herbert W. Virgin, E. John Wherry

Department of Microbiology and Immunology Faculty Papers

Noroviruses can establish chronic infections with active viral shedding in healthy humans but whether persistence is associated with adaptive immune dysfunction is unknown. We used genetically engineered strains of mouse norovirus (MNV) to investigate CD8+ T cell differentiation during chronic infection. We found that chronic infection drove MNV-specific tissue-resident memory (Trm) CD8+ T cells to a differentiation state resembling inflationary effector responses against latent cytomegalovirus with only limited evidence of exhaustion. These MNV-specific Trm cells remained highly functional yet appeared ignorant of ongoing viral replication. Pre-existing MNV-specific Trm cells provided partial protection against chronic infection but largely ceased …


Spinal Excitability Changes After Transspinal And Transcortical Paired Associative Stimulation In Humans, Maria Knikou Oct 2017

Spinal Excitability Changes After Transspinal And Transcortical Paired Associative Stimulation In Humans, Maria Knikou

Publications and Research

Paired associative stimulation (PAS) produces enduring neuroplasticity based on Hebbian associative plasticity. This study established the changes in spinal motoneuronal excitability by pairing transcortical and transspinal stimulation. Transcortical stimulation was delivered after (transspinal-transcortical PAS) or before (transcortical-transspinal PAS) transspinal stimulation. Before and after 40 minutes of each PAS protocol, spinal neural excitability was assessed based on the amplitude of the transspinal-evoked potentials (TEPs) recorded from ankle muscles of both legs at different stimulation intensities (recruitment input-output curve). Changes in TEPs amplitude in response to low-frequency stimulation and paired transspinal stimuli were also established before and after each PAS protocol. TEP …


Glycolytic Reprogramming Through Pck2 Regulates Tumor Initiation Of Prostate Cancer Cells, Jiangsha Zhao, Jieran Li, Teresa W.M. Fan, Steven X. Hou Oct 2017

Glycolytic Reprogramming Through Pck2 Regulates Tumor Initiation Of Prostate Cancer Cells, Jiangsha Zhao, Jieran Li, Teresa W.M. Fan, Steven X. Hou

Toxicology and Cancer Biology Faculty Publications

Tumor-initiating cells (TICs) play important roles in tumor progression and metastasis. Identifying the factors regulating TICs may open new avenues in cancer therapy. Here, we show that TIC-enriched prostate cancer cell clones use more glucose and secrete more lactate than TIC-low clones. We determined that elevated levels of phosphoenolpyruvate carboxykinase isoform 2 (PCK2) are critical for the metabolic switch and the maintenance of TICs in prostate cancer. Information from prostate cancer patient databases revealed that higher PCK2 levels correlated with more aggressive tumors and lower survival rates. PCK2 knockdown resulted in low TIC numbers, increased cytosolic acetyl-CoA and cellular protein …


No Difference In Myosin Kinetics And Spatial Distribution Of The Lever Arm In The Left And Right Ventricles Of Human Hearts, Divya Duggal, S. Requena, Janhavi Nagwekar, Sangram Raut, Ryan Rich, Hriday Das, Vipul Patel, Ignacy Gryczynski, Rafal Fudala, Zygmunt Gryczynski, Cheavar Blair, Kenneth S. Campbell, Julian Borejdo Oct 2017

No Difference In Myosin Kinetics And Spatial Distribution Of The Lever Arm In The Left And Right Ventricles Of Human Hearts, Divya Duggal, S. Requena, Janhavi Nagwekar, Sangram Raut, Ryan Rich, Hriday Das, Vipul Patel, Ignacy Gryczynski, Rafal Fudala, Zygmunt Gryczynski, Cheavar Blair, Kenneth S. Campbell, Julian Borejdo

Physiology Faculty Publications

The systemic circulation offers larger resistance to the blood flow than the pulmonary system. Consequently, the left ventricle (LV) must pump blood with more force than the right ventricle (RV). The question arises whether the stronger pumping action of the LV is due to a more efficient action of left ventricular myosin, or whether it is due to the morphological differences between ventricles. Such a question cannot be answered by studying the entire ventricles or myocytes because any observed differences would be wiped out by averaging the information obtained from trillions of myosin molecules present in a ventricle or myocyte. …


Role Of Microglial Amylin Receptors In Mediating Beta Amyloid (Aβ)-Induced Inflammation, Wen Fu, Vlatka Vukojevic, Aarti Patel, Rania Soudy, David Mactavish, David Westaway, Kamaljit Kaur, Valeri Goncharuk, Jack Jhamandas Oct 2017

Role Of Microglial Amylin Receptors In Mediating Beta Amyloid (Aβ)-Induced Inflammation, Wen Fu, Vlatka Vukojevic, Aarti Patel, Rania Soudy, David Mactavish, David Westaway, Kamaljit Kaur, Valeri Goncharuk, Jack Jhamandas

Pharmacy Faculty Articles and Research

Background: Neuroinflammation in the brain consequent to activation of microglia is viewed as an important component of Alzheimer’s disease (AD) pathology. Amyloid beta (Aβ) protein is known to activate microglia and unleash an inflammatory cascade that eventually results in neuronal dysfunction and death. In this study, we sought to identify the presence of amylin receptors on human fetal and murine microglia and determine whether Aβ activation of the inflammasome complex and subsequent release of cytokines is mediated through these receptors.

Methods: The presence of dimeric components of the amylin receptor (calcitonin receptor and receptor activity modifying protein 3) …


Protective Role Of S-Adenosylmethionine Against Fructose-Induced Oxidative Damage In Obesity, Kameliya Zh Bratoeva, Mariya A. Radanova, Albena V. Merdzhanova, Ivan S. Donev Oct 2017

Protective Role Of S-Adenosylmethionine Against Fructose-Induced Oxidative Damage In Obesity, Kameliya Zh Bratoeva, Mariya A. Radanova, Albena V. Merdzhanova, Ivan S. Donev

Journal of Mind and Medical Sciences

Introduction. It has been shown that S-adenosylmethionine (S-AMe) stimulates glutathione synthesis and increases cell resistance to the cytotoxic action of free radicals and pro-inflammatory cytokines. The aim of this study was to determine the effect of S-adenosylmethionine on the oxidative stress in adipose tissue in a model of fructose-induced obesity. Methods. The study was performed on male Wistar rats divided into 3 groups: control, fructose fed (HFD) (35%, 16 weeks), and HFD + S-AMe (20 mg/kg). We examined the changes in the ratio of retroperitoneal adipose tissue weight / body weight; levels of reduced glutathione (GSH) and malondialdehyde (MDA) in …


Wound Healing In Rabbit Corneas After Flapless Refractive Lenticule Extraction With A 345 Nm Ultraviolet Femtosecond Laser, Christian M. Hammer, Corinna Petsch, Jörg Klenke, Katrin Skerl, Christian Wüllner, Christof Donitzky, Friedrich Paulsen, Michael Scholz, Theo Seiler, Friedrich E. Kruse, Johannes Menzel-Severing Oct 2017

Wound Healing In Rabbit Corneas After Flapless Refractive Lenticule Extraction With A 345 Nm Ultraviolet Femtosecond Laser, Christian M. Hammer, Corinna Petsch, Jörg Klenke, Katrin Skerl, Christian Wüllner, Christof Donitzky, Friedrich Paulsen, Michael Scholz, Theo Seiler, Friedrich E. Kruse, Johannes Menzel-Severing

Biomedicine and Animal Models in Research Collection

Purpose

To characterize corneal wound healing in a rabbit model after flapless refractive lenticule extraction with a 345 nm ultraviolet femtosecond laser.

Setting

Departments of Ophthalmology and Anatomy II, University of Erlangen-Nürnberg and Wavelight GmbH, Erlangen, Germany.

Design

Methods

Flapless refractive lenticule extraction was performed in 1 eye each of 20 New Zealand white rabbits (−5.0 diopters). Groups of 4 animals were euthanized after 48 hours, 1 week, 2 weeks, 4 weeks, and 3 months, respectively. Corneal samples were prepared for histology and fluorescence microscopy. To assess corneal cell death, proliferation, and myofibroblastic transdifferentiation, terminal uridine deoxynucleotidyl nick end-labeling (TUNEL) …


Hne-Modified Proteins In Down Syndrome: Involvement In Development Of Alzheimer Disease Neuropathology, Eugenio Barone, Elizabeth Head, D. Allan Butterfield, Marzia Perluigi Oct 2017

Hne-Modified Proteins In Down Syndrome: Involvement In Development Of Alzheimer Disease Neuropathology, Eugenio Barone, Elizabeth Head, D. Allan Butterfield, Marzia Perluigi

Sanders-Brown Center on Aging Faculty Publications

Down syndrome (DS), trisomy of chromosome 21, is the most common genetic form of intellectual disability. The neuropathology of DS involves multiple molecular mechanisms, similar to AD, including the deposition of beta-amyloid (Aβ) into senile plaques and tau hyperphosphorylating in neurofibrillary tangles. Interestingly, many genes encoded by chromosome 21, in addition to being primarily linked to amyloid-beta peptide (Aβ) pathology, are responsible for increased oxidative stress (OS) conditions that also result as a consequence of reduced antioxidant system efficiency. However, redox homeostasis is disturbed by overproduction of Aβ, which accumulates into plaques across the lifespan in DS as well as …


Increased Habenular Connectivity In Opioid Users Is Associated With An Α5 Subunit Nicotinic Receptor Genetic Variant, Kaylah Curtis, Humsini Viswanath, Kenia M Velasquez, David L Molfese, Mark J Harding, Eduardo Aramayo, Philip R Baldwin, Elisa Ambrosi, Alok Madan, Michelle Patriquin, B Christopher Frueh, J Christopher Fowler, Thomas R Kosten, David A Nielsen, Ramiro Salas Oct 2017

Increased Habenular Connectivity In Opioid Users Is Associated With An Α5 Subunit Nicotinic Receptor Genetic Variant, Kaylah Curtis, Humsini Viswanath, Kenia M Velasquez, David L Molfese, Mark J Harding, Eduardo Aramayo, Philip R Baldwin, Elisa Ambrosi, Alok Madan, Michelle Patriquin, B Christopher Frueh, J Christopher Fowler, Thomas R Kosten, David A Nielsen, Ramiro Salas

Staff and Researcher Publications

Background and objectives: Opioid use disorder (OUD) is a chronic disorder with relapse based on both desire for reinforcement (craving) and avoidance of withdrawal. The aversive aspect of dependence and relapse has been associated with a small brain structure called the habenula, which expresses large numbers of both opioid and nicotinic receptors. Additionally, opioid withdrawal symptoms can be induced in opioid-treated rodents by blocking not only opioid, but also nicotinic receptors. This receptor co-localization and cross-induction of withdrawal therefore might lead to genetic variation in the nicotinic receptor influencing development of human opioid dependence through its impact on the aversive …


Interactions Of Primary Insult Biomechanics And Secondary Cascades In Spinal Cord Injury: Implications For Therapy, Michael B. Orr, John C. Gensel Oct 2017

Interactions Of Primary Insult Biomechanics And Secondary Cascades In Spinal Cord Injury: Implications For Therapy, Michael B. Orr, John C. Gensel

Spinal Cord and Brain Injury Research Center Faculty Publications

No abstract provided.


Adipose Tissue As A Site Of Toxin Accumulation, Erin Jackson, Robin C. Shoemaker, Nika Larian, Lisa A. Cassis Oct 2017

Adipose Tissue As A Site Of Toxin Accumulation, Erin Jackson, Robin C. Shoemaker, Nika Larian, Lisa A. Cassis

Pharmacology and Nutritional Sciences Faculty Publications

We examine the role of adipose tissue, typically considered an energy storage site, as a potential site of toxicant accumulation. Although the production of most persistent organic pollutants (POPs) was banned years ago, these toxicants persist in the environment due to their resistance to biodegradation and widespread distribution in various environmental forms (e.g., vapor, sediment, and water). As a result, human exposure to these toxicants is inevitable. Largely due to their lipophilicity, POPs bioaccumulate in adipose tissue, resulting in greater body burdens of these environmental toxicants with obesity. POPs of major concern include polychlorinated biphenyls (PCBs), polychlorinated dibenzo‐p‐dioxins and furans …


The Trophic Life Cycle Stage Of The Opportunistic Fungal Pathogen Pneumocystis Murina Hinders The Ability Of Dendritic Cells To Stimulate Cd4+ T Cell Responses, Heather M. Evans, Andrew Simpson, Shu Shen, Arnold J. Stromberg, Carol L. Pickett, Beth A. Garvy Oct 2017

The Trophic Life Cycle Stage Of The Opportunistic Fungal Pathogen Pneumocystis Murina Hinders The Ability Of Dendritic Cells To Stimulate Cd4+ T Cell Responses, Heather M. Evans, Andrew Simpson, Shu Shen, Arnold J. Stromberg, Carol L. Pickett, Beth A. Garvy

Microbiology, Immunology, and Molecular Genetics Faculty Publications

The life cycle of the opportunistic fungal pathogen Pneumocystis murina consists of a trophic stage and an ascus-like cystic stage. Infection with the cyst stage induces proinflammatory immune responses, while trophic forms suppress the cytokine response to multiple pathogen-associated molecular patterns (PAMPs), including β-glucan. A targeted gene expression assay was used to evaluate the dendritic cell response following stimulation with trophic forms alone, with a normal mixture of trophic forms and cysts, or with β-glucan. We demonstrate that stimulation with trophic forms downregulated the expression of multiple genes normally associated with the response to infection, including genes encoding …


The Dual Role Of Group V Secretory Phospholipase A2 In Pancreatic Β-Cells, Preetha Shridas, Victoria P. Noffsinger, Andrea C. Trumbauer, Nancy R. Webb Oct 2017

The Dual Role Of Group V Secretory Phospholipase A2 In Pancreatic Β-Cells, Preetha Shridas, Victoria P. Noffsinger, Andrea C. Trumbauer, Nancy R. Webb

Saha Cardiovascular Research Center Faculty Publications

Purpose

Group X (GX) and group V (GV) secretory phospholipase A2 (sPLA2) potently release arachidonic acid (AA) from the plasma membrane of intact cells. We previously demonstrated that GX sPLA2 negatively regulates glucose-stimulated insulin secretion (GSIS) by a prostaglandin E2 (PGE2)-dependent mechanism. In this study we investigated whether GV sPLA2 similarly regulates GSIS.

Methods

GSIS and pancreatic islet-size were assessed in wild-type (WT) and GV sPLA2-knock out (GV KO) mice. GSIS was also assessed ex vivo in isolated islets and in vitro using MIN6 pancreatic beta cell lines with or without GV sPLA …


Caring For Caregivers: Challenges Facing Informal Palliative Caregivers In Western Kenya, Hartlee Johnston Oct 2017

Caring For Caregivers: Challenges Facing Informal Palliative Caregivers In Western Kenya, Hartlee Johnston

Independent Study Project (ISP) Collection

Chronic illnesses like cancer, HIV, and other non-communicable disease are increasing globally, especially in developing countries, necessitating development of palliative care and symptom management systems. In Kenya, the burden of care for chronically ill patients often falls to unpaid, informal caregivers like family members or friends. Thirty-five current or past informal caregivers from Kisumu, Kenya were interviewed about their experience, challenges they faced, and interventions they felt would be helpful. Major challenges identified included lack of finances for treatment and other living expenses; inadequate, unaffordable, or interrupted medical care; emotional stress exacerbated by juggling many responsibilities, pressure to emotionally support …


Primary Hepatic Leiomyosarcoma Presenting As A Budd-Chiari-Like Syndrome., Jessica Watson, Carolyn Hanna Md, Ross Biggs Do, Matthew Sullivan Oct 2017

Primary Hepatic Leiomyosarcoma Presenting As A Budd-Chiari-Like Syndrome., Jessica Watson, Carolyn Hanna Md, Ross Biggs Do, Matthew Sullivan

Department of Medicine

No abstract provided.


The Psychology Of Neurofeedback: Clinical Intervention Even If Applied Placebo, Robert T. Thibault, Amir Raz Oct 2017

The Psychology Of Neurofeedback: Clinical Intervention Even If Applied Placebo, Robert T. Thibault, Amir Raz

Psychology Faculty Articles and Research

Advocates of neurofeedback make bold claims concerning brain regulation, treatment of disorders, and mental health. Decades of research and thousands of peer-reviewed publications support neurofeedback using electroencephalography (EEG-nf); yet, few experiments isolate the act of receiving feedback from a specific brain signal as a necessary precursor to obtain the purported benefits. Moreover, while psychosocial parameters including participant motivation and expectation, rather than neurobiological substrates, seem to fuel clinical improvement across a wide range of disorders, for-profit clinics continue to sprout across North America and Europe. Here, we highlight the tenuous evidence supporting EEG-nf and sketch out the weaknesses of this …


Evaluating The Therapeutic Effect Of Purslane Extract On The Submandibular Salivary Glands Of Cyclosporine-A Treated Rats, Heba Mahmoud, Rabab T. Mubarak, Iman M. Aboushady Oct 2017

Evaluating The Therapeutic Effect Of Purslane Extract On The Submandibular Salivary Glands Of Cyclosporine-A Treated Rats, Heba Mahmoud, Rabab T. Mubarak, Iman M. Aboushady

Dentistry

Salivary glands are affected by immunosuppressive drugs, like Cyclosporine-A (CsA) which plays a major role in transplant medicine. Thus, this work aimed to study the possible therapeutic effect of purslane on CsA induced salivary gland alterations.

Materials & Methods: 30 adult male albino rats were equally divided into 3 groups: control group ] received a vehicle, CsA group received 20 mg/kg/day of CsA, and combination group received CsA and 400mg/kg/day of purslane. Three weeks later rats were sacrified then the submandibular salivary glands were prepared for histological andKi67 immunohistochemical analysis, then the studied groups were statistically evaluated.

Results: Histological examination …


Peptidyl-Prolyl Isomerase 1 Regulates Ca(2+) Handling By Modulating Sarco(Endo)Plasmic Reticulum Calcium Atpase And Na(2+)/Ca(2+) Exchanger 1 Protein Levels And Function, V Sacchi, B Wang, D Kubli, A Martinez, J Jin, R Alvarez, N Hariharan, C Glembotski, T Uchida, J Malter, Y Yang, P Gross, C Zhang, S Houser, Marcello Rota, M Sussman Oct 2017

Peptidyl-Prolyl Isomerase 1 Regulates Ca(2+) Handling By Modulating Sarco(Endo)Plasmic Reticulum Calcium Atpase And Na(2+)/Ca(2+) Exchanger 1 Protein Levels And Function, V Sacchi, B Wang, D Kubli, A Martinez, J Jin, R Alvarez, N Hariharan, C Glembotski, T Uchida, J Malter, Y Yang, P Gross, C Zhang, S Houser, Marcello Rota, M Sussman

NYMC Faculty Publications

BACKGROUND: Aberrant Ca(2+) handling is a prominent feature of heart failure. Elucidation of the molecular mechanisms responsible for aberrant Ca(2+) handling is essential for the development of strategies to blunt pathological changes in calcium dynamics. The peptidyl-prolyl cis-trans isomerase peptidyl-prolyl isomerase 1 (Pin1) is a critical mediator of myocardial hypertrophy development and cardiac progenitor cell cycle. However, the influence of Pin1 on calcium cycling regulation has not been explored. On the basis of these findings, the aim of this study is to define Pin1 as a novel modulator of Ca(2+) handling, with implications for improving myocardial contractility and potential for …


Complete Genome Sequence Of A Colistin-Resistant Escherichia Coli Strain Harboring Mcr-1 On An Inchi2 Plasmid In The United States, V Gilrane, S Lobo, Weihua Huang, J Zhuge, Changhong Yin, Donald Chen, K Alvarez, Alexandra Budhai, I Nadelman, Nevenka Dimitrova, John Fallon, Guiqing Wang Oct 2017

Complete Genome Sequence Of A Colistin-Resistant Escherichia Coli Strain Harboring Mcr-1 On An Inchi2 Plasmid In The United States, V Gilrane, S Lobo, Weihua Huang, J Zhuge, Changhong Yin, Donald Chen, K Alvarez, Alexandra Budhai, I Nadelman, Nevenka Dimitrova, John Fallon, Guiqing Wang

NYMC Faculty Publications

We report here the incidental detection and complete genome sequence of a urinary Escherichia coli strain harboring mcr-1 and resistant to colistin in a New York patient returning from Portugal in 2016. This strain, with sequence type 1485 (ST1485), was a non-extended-spectrum beta-lactamase (ESBL) and non-carbapenemase producer and carried the mcr-1 gene on an IncHI2 plasmid.


Mutsβ Abundance And Msh3 Atp Hydrolysis Activity Are Important Drivers Of Ctg•Cag Repeat Expansions, Norma Keogh, Kara Y. Chan, Guo-Min Li, Robert S. Lahue Sep 2017

Mutsβ Abundance And Msh3 Atp Hydrolysis Activity Are Important Drivers Of Ctg•Cag Repeat Expansions, Norma Keogh, Kara Y. Chan, Guo-Min Li, Robert S. Lahue

Toxicology and Cancer Biology Faculty Publications

CTG•CAG repeat expansions cause at least twelve inherited neurological diseases. Expansions require the presence, not the absence, of the mismatch repair protein MutSβ (Msh2-Msh3 heterodimer). To evaluate properties of MutSβ that drive expansions, previous studies have tested under-expression, ATPase function or polymorphic variants of Msh2 and Msh3, but in disparate experimental systems. Additionally, some variants destabilize MutSβ, potentially masking the effects of biochemical alterations of the variations. Here, human Msh3 was mutated to selectively inactivate MutSβ. Msh3−/− cells are severely defective for CTG•CAG repeat expansions but show full activity on contractions. Msh3−/− cells provide a single, isogenic system …


Decorin-Evoked Paternally Expressed Gene 3 (Peg3) Is An Upstream Regulator Of The Transcription Factor Eb (Tfeb) In Endothelial Cell Autophagy., Thomas Neill, Catherine Sharpe, Rick T. Owens, Renato V. Iozzo Sep 2017

Decorin-Evoked Paternally Expressed Gene 3 (Peg3) Is An Upstream Regulator Of The Transcription Factor Eb (Tfeb) In Endothelial Cell Autophagy., Thomas Neill, Catherine Sharpe, Rick T. Owens, Renato V. Iozzo

Department of Pathology, Anatomy, and Cell Biology Faculty Papers

Macroautophagy is a fundamental and evolutionarily conserved catabolic process that eradicates damaged and aging macromolecules and organelles in eukaryotic cells. Decorin, an archetypical small leucine-rich proteoglycan, initiates a protracted autophagic program downstream of VEGF receptor 2 (VEGFR2) signaling that requires paternally expressed gene 3 (PEG3). We have discovered that PEG3 is an upstream transcriptional regulator of transcription factor EB (TFEB), a master transcription factor of lysosomal biogenesis, for decorin-evoked endothelial cell autophagy. We found a functional requirement of PEG3 for TFEB transcriptional induction and nuclear translocation in human umbilical vein endothelial and PAER2 cells. Mechanistically, inhibiting VEGFR2 or AMP-activated protein …


Chemotherapy-Induced Tissue Injury: An Insight Into The Role Of Extracellular Vesicles-Mediated Oxidative Stress Responses, Chontida Yarana, Daret K. St. Clair Sep 2017

Chemotherapy-Induced Tissue Injury: An Insight Into The Role Of Extracellular Vesicles-Mediated Oxidative Stress Responses, Chontida Yarana, Daret K. St. Clair

Toxicology and Cancer Biology Faculty Publications

The short- and long-term side effects of chemotherapy limit the maximum therapeutic dose and impair quality of life of survivors. Injury to normal tissues, especially chemotherapy-induced cardiomyopathy, is an unintended outcome that presents devastating health impacts. Approximately half of the drugs approved by the Food and Drug Administration for cancer treatment are associated with the generation of reactive oxygen species, and Doxorubicin (Dox) is one of them. Dox undergoes redox cycling by involving its quinone structure in the production of superoxide free radicals, which are thought to be instrumental to the role it plays in cardiomyopathy. Dox-induced protein oxidation changes …


Concussion As A Multi-Scale Complex System: An Interdisciplinary Synthesis Of Current Knowledge, Erin S. Kenzie, Elle L. Parks, Erin D. Bigler, Miranda M. Lim, James C. Chesnutt, Wayne Wakeland Sep 2017

Concussion As A Multi-Scale Complex System: An Interdisciplinary Synthesis Of Current Knowledge, Erin S. Kenzie, Elle L. Parks, Erin D. Bigler, Miranda M. Lim, James C. Chesnutt, Wayne Wakeland

Complex Systems Faculty Publications and Presentations

Traumatic brain injury (TBI) has been called “the most complicated disease of the most complex organ of the body” and is an increasingly high-profile public health issue. Many patients report long-term impairments following even “mild” injuries, but reliable criteria for diagnosis and prognosis are lacking. Every clinical trial for TBI treatment to date has failed to demonstrate reliable and safe improvement in outcomes, and the existing body of literature is insufficient to support the creation of a new classification system. Concussion, or mild TBI, is a highly heterogeneous phenomenon, and numerous factors interact dynamically to influence an individual’s recovery trajectory. …


Age Drives Distortion Of Brain Metabolic, Vascular And Cognitive Functions, And The Gut Microbiome, Jared D. Hoffman, Ishita Parikh, Stefan J. Green, George Chlipala, Robert P. Mohney, Mignon Keaton, Bjoern Bauer, Anika M. S. Hartz, Ai-Ling Lin Sep 2017

Age Drives Distortion Of Brain Metabolic, Vascular And Cognitive Functions, And The Gut Microbiome, Jared D. Hoffman, Ishita Parikh, Stefan J. Green, George Chlipala, Robert P. Mohney, Mignon Keaton, Bjoern Bauer, Anika M. S. Hartz, Ai-Ling Lin

Sanders-Brown Center on Aging Faculty Publications

Advancing age is the top risk factor for the development of neurodegenerative disorders, including Alzheimer’s disease (AD). However, the contribution of aging processes to AD etiology remains unclear. Emerging evidence shows that reduced brain metabolic and vascular functions occur decades before the onset of cognitive impairments, and these reductions are highly associated with low-grade, chronic inflammation developed in the brain over time. Interestingly, recent findings suggest that the gut microbiota may also play a critical role in modulating immune responses in the brain via the brain-gut axis. In this study, our goal was to identify associations between deleterious changes in …


Rabies Screen Reveals Gpe Control Of Cocaine-Triggered Plasticity., Kevin T. Beier, Christina K. Kim, Paul Hoerbelt, Lin Wai Hung, Boris D. Heifets, Katherine E. Deloach, Timothy J. Mosca, Sophie Neuner, Karl Deisseroth, Liqun Luo, Robert C. Malenka Sep 2017

Rabies Screen Reveals Gpe Control Of Cocaine-Triggered Plasticity., Kevin T. Beier, Christina K. Kim, Paul Hoerbelt, Lin Wai Hung, Boris D. Heifets, Katherine E. Deloach, Timothy J. Mosca, Sophie Neuner, Karl Deisseroth, Liqun Luo, Robert C. Malenka

Department of Neuroscience Faculty Papers

Identification of neural circuit changes that contribute to behavioural plasticity has routinely been conducted on candidate circuits that were preselected on the basis of previous results. Here we present an unbiased method for identifying experience-triggered circuit-level changes in neuronal ensembles in mice. Using rabies virus monosynaptic tracing, we mapped cocaine-induced global changes in inputs onto neurons in the ventral tegmental area. Cocaine increased rabies-labelled inputs from the globus pallidus externus (GPe), a basal ganglia nucleus not previously known to participate in behavioural plasticity triggered by drugs of abuse. We demonstrated that cocaine increased GPe neuron activity, which accounted for the …


Different Effects Of Maternal Low-Isoflavone Soy Protein And Genistein Consumption On Hepatic Lipid Metabolism Of 21-Day-Old Male Rat Offspring., Anna Han, Sae Bom Won, Young Hye Kwon Sep 2017

Different Effects Of Maternal Low-Isoflavone Soy Protein And Genistein Consumption On Hepatic Lipid Metabolism Of 21-Day-Old Male Rat Offspring., Anna Han, Sae Bom Won, Young Hye Kwon

Department of Cancer Biology Faculty Papers

Amino acid composition and isoflavone are alleged contributors to the beneficial effects of soy protein isolate (SPI) on lipid metabolism. Therefore, we investigated the contributing component(s) of SPI in a maternal diet to the regulation of lipid metabolism in offspring. We also determined serum parameters in dams to investigate specific maternal cues that might be responsible for this regulation. Female rats were fed either a casein (CAS), a low-isoflavone SPI, or a casein plus genistein (GEN, 250 mg/kg) diet for two weeks before mating, as well as during pregnancy and lactation. Male offspring (CAS, SPI and GEN groups) were studied …


The Heat-Stable Enterotoxin Receptor, Guanylyl Cyclase C, As A Pharmacological Target In Colorectal Cancer Immunotherapy: A Bench-To-Bedside Current Report., Trevor R. Baybutt, Allison A. Aka, Adam E. Snook Sep 2017

The Heat-Stable Enterotoxin Receptor, Guanylyl Cyclase C, As A Pharmacological Target In Colorectal Cancer Immunotherapy: A Bench-To-Bedside Current Report., Trevor R. Baybutt, Allison A. Aka, Adam E. Snook

Department of Pharmacology and Experimental Therapeutics Faculty Papers

Cancer immunotherapy is becoming a routine treatment modality in the oncology clinic, in spite of the fact that it is a relatively nascent field. The challenge in developing effective immunotherapeutics is the identification of target molecules that promote anti-tumor efficacy across the patient population while sparing healthy tissue from damaging autoimmunity. The intestinally restricted receptor guanylyl cyclase C (GUCY2C) is a target that has been investigated for the treatment of colorectal cancer and numerous animal, and clinical studies have demonstrated both efficacy and safety. Here, we describe the current state of GUCY2C-directed cancer immunotherapy and the future directions of this …