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Himmelfarb Headlines - September/October 2015, George Washington University, Himmelfarb Health Sciences Library

Himmelfarb Headlines (2009 - present)

News and information about Himmelfarb Health Sciences Library of interest to users. Includes articles on Overleaf collaboration tool, video resources at Himmelfarb, and profiles on Brian McDonald and Leighton Ku.

Discordant Identification Of Pediatric Severe Sepsis By Research And Clinical Definitions In The Sprout International Point Prevalence Study, S. L. Weiss, J. C. Fitzgerald, F. A. Maffei, J. M. Kane, A. Rodriguez-Nunez, Michael C. Spaeder, +260 Additional Authors

Pediatrics Faculty Publications

Introduction

Consensus criteria for pediatric severe sepsis have standardized enrollment for research studies. However, the extent to which critically ill children identified by consensus criteria reflect physician diagnosis of severe sepsis, which underlies external validity for pediatric sepsis research, is not known. We sought to determine the agreement between physician diagnosis and consensus criteria to identify pediatric patients with severe sepsis across a network of international pediatric intensive care units (PICUs).

Methods

We conducted a point prevalence study involving 128 PICUs in 26 countries across 6 continents. Over the course of 5 study days, 6925 PICU patients <18 years of age were screened, and 706 with severe sepsis defined either by physician diagnosis or on the basis of 2005 International Pediatric Sepsis Consensus Conference consensus criteria were enrolled. The primary endpoint was agreement of pediatric severe sepsis between physician diagnosis and consensus criteria as measured using Cohen’s κ. Secondary endpoints included characteristics and clinical outcomes for patients identified using physician diagnosis versus consensus criteria.

Results

Of the …

Csf And Blood Levels Of Gfap In Alexander Disease(1,2,3)., Paige L Jany, Guillermo E Agosta, William S Benko, Jens C Eickhoff, Stephanie R Keller, Adeline Vanderver, +13 Additional Authors

Neurology Faculty Publications

Alexander disease is a rare, progressive, and generally fatal neurological disorder that results from dominant mutations affecting the coding region of GFAP, the gene encoding glial fibrillary acidic protein, the major intermediate filament protein of astrocytes in the CNS. A key step in pathogenesis appears to be the accumulation of GFAP within astrocytes to excessive levels. Studies using mouse models indicate that the severity of the phenotype correlates with the level of expression, and suppression of GFAP expression and/or accumulation is one strategy that is being pursued as a potential treatment. With the goal of identifying biomarkers that indirectly reflect …

Himmelfarb Library Liaison Letter - September 2015, George Washington University, Himmelfarb Health Sciences Library

Himmelfarb Library Liaison Letters

No abstract provided.

Longitudinal Analysis Of Electronic Health Records On Staffing Mix In Community Health Centers, Bianca K. Frogner, Xiaoli Wu, Jeongyoung Park, Patricia Pittman

Health Workforce Research Center Publications

Community health centers (CHCs) have long faced clinical staffing challenges especially in rural areas of the US due to providers perceiving a lack of socioeconomic opportunities. A recent study found that CHCs are adaptable and manage to maintain productivity levels across different staffing configurations by leveraging the clinical staff available. What is unknown is how two major changes in the health care landscape—adoption of an electronic health record (EHR) system and recognition of being a patient-centered medical home (PCMH)—have impacted staffing in CHCs, which may in turn have productivity implications.

How Has The Affordable Care Act Benefitted Medically Underserved Communities? : National Findings From The 2014 Community Health Centers Uniform Data System, Jessica Sharac, Peter Shin, Sara J. Rosenbaum

Geiger Gibson/RCHN Community Health Foundation Research Collaborative

Community health centers represent the single largest comprehensive primary health care system serving medically underserved communities, operating in more than 9,000 urban and rural locations. Newly-released data for 2014 from the Uniform Data System (UDS; the federal health center reporting system) shed important light on the impact of the Affordable Care Act in its first full year of implementation in medically underserved urban and rural communities across the U.S. These communities experience elevated poverty, heightened health risks, lack of access to primary health care, and a significantly greater likelihood that residents will be uninsured.

The UDS data show the ACA’s …

National Advisory Council On The National Health Service Corps (Nhsc), Sara J. Rosenbaum

Health Policy and Management Faculty Posters and Presentations

No abstract provided.

The Right Tool For The Job: Detection Of Soil-Transmitted Helminths In Areas Co-Endemic For Other Helminths, Maria V. Periago, Renata C. Diniz, Simone A. Pinto, Anna Yakovleva, Rodrigo Correa-Oliveira, David J. Diemert, Jeffrey M. Bethony

Microbiology, Immunology, and Tropical Medicine Faculty Publications

Due to the recent increased use of the McMaster (MM) fecal egg counting method for assessing benzimidazole drug efficacy for treating soil-transmitted helminth (STH) infections, the aim of the current study was to determine the operational value of including the MM method alongside the Kato-Katz (KK) fecal thick smear to increase the diagnostic sensitivity when STHs are co-endemic with trematode helminths (e.g., Schistosoma mansoni).

Methods

A cross-sectional study was conducted in school-aged children aged 4-18 years in the northeastern region of the State of Minas Gerais (Brazil), where Necator americanus, Ascaris lumbricoides, Trichuris trichiura, and S …

Standardization Of The Experimental Autoimmune Myasthenia Gravis (Eamg) Model By Immunization Of Rats With Torpedo Californica Acetylcholine Receptors- Recommendations For Methods And Experimental Designs., Mario Losen, Pilar Martinez-Martinez, Peter C. Molenaar, Konstantinos Lazaridis, Socrates Tzartos, Talma Brenner, Rui-Sheng Duan, Jie Luo, Jon Lindstrom, Linda Kusner

Pharmacology and Physiology Faculty Publications

Myasthenia gravis (MG) with antibodies against the acetylcholine receptor (AChR) is characterized by a chronic, fatigable weakness of voluntary muscles. The production of autoantibodies involves the dysregulation of T cells which provide the environment for the development of autoreactive B cells. The symptoms are caused by destruction of the postsynaptic membrane and degradation of the AChR by IgG autoantibodies, predominantly of the G1 and G3 subclasses. Active immunization of animals with AChR from mammalian muscles, AChR from Torpedo or Electrophorus electric organs, and recombinant or synthetic AChR fragments generates a chronic model of MG, termed experimental autoimmune myasthenia gravis (EAMG). …

Magnetic Resonance Microscopy Of Renal And Biliary Abnormalities In Excised Tissues From A Mouse Model Of Autosomal Recessive Polycystic Kidney Disease., Choong H Lee, Amber K O'Connor, Chaozhe Yang, Joshua M Tate, Trenton R Schoeb, Jeremy J Flint, Stephen J Blackband, Lisa M. Guay-Woodford

Pediatrics Faculty Publications

Polycystic kidney disease (PKD) is transmitted as either an autosomal dominant or recessive trait and is a major cause of renal failure and liver fibrosis. The cpk mouse model of autosomal recessive PKD (ARPKD) has been extensively characterized using standard histopathological techniques after euthanasia. In the current study, we sought to validate magnetic resonance microscopy (MRM) as a robust tool for assessing the ARPKD phenotype. We used MRM to evaluate the liver and kidney of wild-type and cpk animals at resolutions <100 >μm and generated three-dimensional (3D) renderings for pathological evaluation. Our study demonstrates that MRM is an excellent method for …

Extended Followup Of A Cohort Of Chromium Production Workers, Herman Jones Gibb, Peter St. John Lees, Jing Wang, Keri O'Leary

Epidemiology Faculty Publications

Background

The current study evaluates the mortality of 2,354 workers first employed at a Baltimore chromate production plant between 1950 and 1974.

Methods

The National Death Index (NDI Plus) was used to determine vital status and cause of death. Cumulative chromium (VI) exposure and nasal and skin irritation were evaluated as risk factors for lung cancer mortality.

Results

There are 91,186 person-years of observation and 217 lung cancer deaths. Cumulative chromium (VI) exposure, nasal irritation, nasal perforation, nasal ulceration, and other forms of irritation (e.g., skin irritation) were associated with lung cancer mortality.

Conclusion

Cumulative chromium (VI) exposure was a …

Diagnostic Yield Of Continuous Video Eeg For Neonatal Seizures, Tammy N. Tsuchida

Pediatrics Faculty Publications

Investigators from the University of California, San Francisco studied the yield of continuous video EEG (vEEG) in diagnosing electrographic seizures in their neonatal intensive care unit. Over a 4.5 year period, 595 neonates were evaluated, of which 66% were term and 67% referred from an outside hospital. Therapeutic hypothermia was completed in 25%. There was a 14% mortality rate. Neonates with electrographic seizures were identified by reviewing clinical vEEG reports.

vEEG was clinically indicated for 400/595 (67%) of the neonates, with approximately equal proportions for two or more of the following indications: event concerning for seizure, encephalopathy, or high risk …

Mirtarvis: An Interactive Visual Analysis Tool For Microrna-Mrna Expression Profile Data, Daekyoung Jung, Bohyoung Kim, Robert J. Freishtat, Manta Giri, Eric P. Hoffman, Jinwook Seo

Pediatrics Faculty Publications

Background

MicroRNAs (miRNA) are short nucleotides that down-regulate its target genes. Various miRNA target prediction algorithms have used sequence complementarity between miRNA and its targets. Recently, other algorithms tried to improve sequence-based miRNA target prediction by exploiting miRNA-mRNA expression profile data. Some web-based tools are also introduced to help researchers predict targets of miRNAs from miRNA-mRNA expression profile data. A demand for a miRNA-mRNA visual analysis tool that features novel miRNA prediction algorithms and more interactive visualization techniques exists.

Results

We designed and implemented miRTarVis, which is an interactive visual analysis tool that predicts targets of miRNAs from miRNA-mRNA …

Bioregulatory Systems Medicine: An Innovative Approach To Integrating The Science Of Molecular Networks, Inflammation, And Systems Biology With The Patient's Autoregulatory Capacity?, Alyssa W Goldman, Yvonne Burmeister, Konstantin Cesnulevicius, Martha Herbert, Mary Kane, David Lescheid, Timothy Mccaffrey, Myron Schultz, Bernd Seilheimer, Alta Smit, Georges St Laurent, Brian Berman

Medicine Faculty Publications

Bioregulatory systems medicine (BrSM) is a paradigm that aims to advance current medical practices. The basic scientific and clinical tenets of this approach embrace an interconnected picture of human health, supported largely by recent advances in systems biology and genomics, and focus on the implications of multi-scale interconnectivity for improving therapeutic approaches to disease. This article introduces the formal incorporation of these scientific and clinical elements into a cohesive theoretical model of the BrSM approach. The authors review this integrated body of knowledge and discuss how the emergent conceptual model offers the medical field a new avenue for extending the …

Mantle Cell Lymphoma: Current Concepts, Manish K. Pant, Weaam Alshenawy, Ahmed Alrajjal, Hussain Alrobeh, Imad A. Tabbara

Medicine Faculty Publications

Mantle Cell Lymphoma is a rare B-cell malignancy that can invade almost any structure in the body and recur after short-lived clinical responses. The pathogenesis and clinical features are well defined, but management has not yet been optimized. Induction with traditional immune-chemotherapy regimens that are used in other nonHodgkin lymphomas rarely generate durable remissions. Therefore, clinical research is needed to improve treatment of de novo disease and to establish safe and effective regimens for maintenance and salvage options for relapsed or refractory disease. This comprehensive review discusses disease pathogenesis and focuses on emerging treatment paradigms using novel targeted therapies.

Himmelfarb Library Liaison Letter - August 2015, George Washington University, Himmelfarb Health Sciences Library

Himmelfarb Library Liaison Letters

No abstract provided.

Sexual Networks And Hiv Risk Among Black Men Who Have Sex With Men In 6 U.S. Cities, Hong-Van Tieu, Ting-Yuan Liu, Sophia Hussen, Matthew Connor, Lei Wang, Gregory Phillips Ii, + 11 More

Epidemiology Faculty Publications

Background

Sexual networks may place U.S. Black men who have sex with men (MSM) at increased HIV risk.

Methods

Self-reported egocentric sexual network data from the prior six months were collected from 1,349 community-recruited Black MSM in HPTN 061, a multi-component HIV prevention intervention feasibility study. Sexual network composition, size, and density (extent to which members are having sex with one another) were compared by self-reported HIV serostatus and age of the men. GEE models assessed network and other factors associated with having a Black sex partner, having a partner with at least two age category difference (age difference between …

Optimisations And Challenges Involved In The Creation Of Various Bioluminescent And Fluorescent Influenza A Virus Strains For In Vitro And In Vivo Applications, Monique I. Spronken, Kristy Short, Sander Herfst, Theo M. Bestebroer, Vincent P. Vaes, Erin Sorrell, + 9 More

Health Policy and Management Faculty Publications

Bioluminescent and fluorescent influenza A viruses offer new opportunities to study influenza virus replication, tropism and pathogenesis. To date, several influenza A reporter viruses have been described. These strategies typically focused on a single reporter gene (either bioluminescent or fluorescent) in a single virus backbone. However, whilst bioluminescence is suited to in vivo imaging, fluorescent viruses are more appropriate for microscopy. Therefore, the idea l reporter virus varies depending on the experiment in question, and it is important that any reporter virus strategy can be adapted accordingly. Herein, a strategy was developed to create five different reporter viruses in a …

Caffeine Consumption Contributes To Skin Intrinsic Fluorescence In Type 1 Diabetes., Karen M Eny, Trevor J Orchard, Rachel Grace Miller, John Maynard, Denis M Grant, Tina Costacou, Patricia A. Cleary, Barbara H Braffett, Andrew D Paterson, Dcct/Edic Research Group

GW Biostatistics Center

Background: A variant (rs1495741) in the gene for the N-acetyltransferase 2 (NAT2) protein is associated with skin intrinsic fluorescence (SIF), a noninvasive measure of advanced glycation end products and other fluorophores in the skin. Because NAT2 is involved in caffeine metabolism, we aimed to determine whether caffeine consumption is associated with SIF and whether rs1495741 is associated with SIF independently of caffeine.

Materials and Methods: SIF was measured in 1,181 participants with type 1 diabetes from the Epidemiology of Diabetes Interventions and Complications study. Two measures of SIF were used: SIF1, using a 375-nm excitation light-emitting diode (LED), and …

Development Of A Biosensor-Based Rapid Urine Test For Detection Of Urogenital Schistosomiasis., Kathleen E Mach, Ruchika Mohan, Shailja Patel, Pak Kin Wong, Michael Hsieh, Joseph C Liao

Urology Faculty Publications

No abstract provided.

Patient Experiences With Family Planning In Community Health Centers, Susan F. Wood, Tishra Beeson, Debora Goetz Goldberg, Holly Mead, Peter Shin, Aliyah Abdul-Wakil, Anna Rui, Bhakti Sahgal, Maya Shimony, Hallie Stevens, Sara Rosenbaum

Geiger Gibson/RCHN Community Health Foundation Research Collaborative

Women of childbearing age represent one of the single largest groups of community health center patients, and family planning plays a critical role in the health, economic, and social circumstances of women, their children, and families. Family planning is a required service at all health centers, and the major expansion of health centers under the Affordable Care Act means that for low-income women of reproductive age this service should be increasingly available. The Quality Family Planning (QFP) Guidelines, jointly developed by the Centers for Disease Control and Prevention (CDC) and the Office of Population Affairs (OPA) and released in 2014, …

A Randomized Controlled Trial Of Exercise In Spinal And Bulbar Muscular Atrophy., Joseph A Shrader, Ilona Kats, Angela Kokkinis, Cris Zampieri, Ellen Levy, Galen O Joe, Joshua G. Woolstenhulme, Bart E Drinkard, Michaele R Smith, Willie Ching, Laboni Ghosh, Derrick Fox, Sungyoung Auh, Alice B Schindler, Kenneth H Fischbeck, Christopher Grunseich

Physical Therapy and Health Care Sciences Faculty Publications

OBJECTIVE: To determine the safety and efficacy of a home-based functional exercise program in spinal and bulbar muscular atrophy (SBMA).

METHODS: Subjects were randomly assigned to participate in 12 weeks of either functional exercises (intervention) or a stretching program (control) at the National Institutes of Health in Bethesda, MD. A total of 54 subjects enrolled, and 50 completed the study with 24 in the functional exercise group and 26 in the stretching control group. The primary outcome measure was the Adult Myopathy Assessment Tool (AMAT) total score, and secondary measures included total activity by accelerometry, muscle strength, balance, timed up …

Targeting Il13ralpha2 Activates Stat6-Tp63 Pathway To Suppress Breast Cancer Lung Metastasis, Panagiotis Papageorgis, Sait Ozturk, Arthur W. Lambert, Christiana M. Neophytou, Alexandros Tzatsos, Chen K. Wong, Sam Thiagalingam, Andreas I. Constantinou

Anatomy and Regenerative Biology Faculty Publications

Introduction

Basal-like breast cancer (BLBC) is an aggressive subtype often characterized by distant metastasis, poor patient prognosis, and limited treatment options. Therefore, the discovery of alternative targets to restrain its metastatic potential is urgently needed. In this study, we aimed to identify novel genes that drive metastasis of BLBC and to elucidate the underlying mechanisms of action.

Methods

An unbiased approach using gene expression profiling of a BLBC progression model and in silicoleveraging of pre-existing tumor transcriptomes were used to uncover metastasis-promoting genes. Lentiviral-mediated knockdown of interleukin-13 receptor alpha 2 (IL13Ralpha2) coupled with whole-body in vivo bioluminescence imaging was …

Optimal Exposure Biomarkers For Nonpersistent Chemicals In Environmental Epidemiology, Antonia M. Calafat, Matthew P. Longnecker, Holger M. Koch, Shanna H. Swan, Russ Hauser, Lynn R. Goldman, +7 Additional Authors

Environmental and Occupational Health Faculty Publications

We discuss considerations that are essential when evaluating exposure to nonpersistent, semivolatile environmental chemicals such as phthalates and phenols (e.g., bisphenol A). A biomarker should be chosen to best represent usual personal exposures and not recent, adventitious, or extraneous exposures. Biomarkers should be selected to minimize contamination arising from collection, sampling, or analysis procedures. Pharmacokinetics should be considered; for example, nonpersistent, semivolatile chemicals are metabolized quickly, and urine is the compartment with the highest concentrations of metabolites. Because these chemicals are nonpersistent, knowledge of intraindividual reliability over the biologic window of interest is also required. In recent years researchers have …

Intermingled Klebsiella Pneumoniae Populations Between Retail Meats And Human Urinary Tract Infections, Gregg S. Davis, Kara Waits, Lora Nordstrom, Brett Weaver, Maliha Aziz, Lance B. Price, +8 Additional Authors

Environmental and Occupational Health Faculty Publications

Background. Klebsiella pneumoniae is a common colonizer of the gastrointestinal tract of humans, companion animals, and livestock. To better understand potential contributions of foodborne K. pneumoniae to human clinical infections, we compared K. pneumoniae isolates from retail meat products and human clinical specimens to assess their similarity based on antibiotic resistance, genetic relatedness, and virulence.

Methods. Klebsiella pneumoniae was isolated from retail meats from Flagstaff grocery stores in 2012 and from urine and blood specimens from Flagstaff Medical Center in 2011–2012. Isolates underwent antibiotic susceptibility testing and whole-genome sequencing. Genetic relatedness of the isolates was assessed using multilocus sequence typing …

Ambient Air Pollution And Adverse Birth Outcomes: A Natural Experiment Study, Cheng Huang, Catherine Nichols, Yang Liu, Yunping Zhang, Xiaohong Liu, Suhong Gao, Zhiwen Li, Aiguo Ren

Global Health Faculty Publications

Background

Radical regulations to improve air quality, including traffic control, were implemented prior to and during the 2008 Beijing Olympic Games. Consequently, ambient concentrations of nitrogen dioxide (NO ₂ ) and particular matter 10 micrometers or less (PM ₁₀ ), were reduced in a distinct and short window of time, which presented a natural experiment for testing the relationships between maternal exposure to PM ₁₀ and NO ₂ during pregnancy and adverse birth outcomes.

Methods

We estimated the effect of PM ₁₀ and NO ₂ exposure during each trimester of gestation on the risk of preterm birth among live births …

Fetal, Neonatal, Infant, And Child International Growth Standards: An Unprecedented Opportunity For An Integrated Approach To Assess Growth And Development., Cutberto Garza

Global Health Faculty Publications

The recent publication of fetal growth and gestational age-specific growth standards by the International Fetal and Newborn Growth Consortium for the 21st Century Project and the previous publication by the WHO of infant and young child growth standards based on the WHO Multicentre Growth Reference Study enable evaluations of growth from ∼9 wk gestation to 5 y. The most important features of these projects are the prescriptive approach used for subject selection and the rigorous testing of the assertion that growth is very similar among geographically and ethnically diverse nonisolated populations when health, nutrition, and other care needs are met …

Predicting Risk Of End-Stage Liver Disease In Antiretroviral-Treated Hiv/Hepatitis C Virus-Coinfected Patients, Vincent Lo Re Iii, Michael J. Kallan, Janet P. Tate, Joseph K. Lim, Matthew Bidwell Goetz, Cynthia L. Gibert, +10 Additional Authors

Medicine Faculty Publications

Background. End-stage liver disease (ESLD) is an important cause of morbidity among HIV/hepatitis C virus (HCV)-coinfected patients. Quantifying the risk of this outcome over time could help determine which coinfected patients should be targeted for risk factor modification and HCV treatment. We evaluated demographic, clinical, and laboratory variables to predict risk of ESLD in HIV/HCV-coinfected patients receiving antiretroviral therapy (ART).

Methods. We conducted a retrospective cohort study among 6,016 HIV/HCV-coinfected patients who received ART within the Veterans Health Administration between 1997 and 2010. The main outcome was incident ESLD, defined by hepatic decompensation, hepatocellular carcinoma, or liver-related death. Cox regression …

Levels Of 8-Oxodg Predict Hepatobiliary Pathology In Opisthorchis Viverrini Endemic Settings In Thailand., Prasert Saichua, Anna Yakovleva, Christine Kamamia, Amar R. Jariwala, Paul J. Brindley, Jeffrey M. Bethony, + 8 More

Microbiology, Immunology, and Tropical Medicine Faculty Publications

Opisthorchis viverrini is distinct among helminth infections as it drives a chronic inflammatory response in the intrahepatic bile duct that progresses from advanced periductal fibrosis (APF) to cholangiocarcinoma (CCA). Extensive research shows that oxidative stress (OS) plays a critical role in the transition from chronic O. viverrini infection to CCA. OS also results in the excision of a modified DNA lesion (8-oxodG) into urine, the levels of which can be detected by immunoassay. Herein, we measured concentrations of urine 8-oxodG by immunoassay from the following four groups in the Khon Kaen Cancer Cohort study: (1) O. viverrini negative individuals, (2) …

Recessive Mutations In Polr1c Cause A Leukodystrophy By Impairing Biogenesis Of Rna Polymerase Iii, Isabelle Thiffault, Nicole I. Wolf, Diane Forget, Kether Guerrero, Adeline Vanderver, Cas Simons, Ryan J. Taft, +17 Additional Authors

Neurology Faculty Publications

A small proportion of 4H (Hypomyelination, Hypodontia and Hypogonadotropic Hypogonadism) or RNA polymerase III (POLR3)-related leukodystrophy cases are negative for mutations in the previously identified causative genes POLR3A and POLR3B. Here we report eight of these cases carrying recessive mutations in POLR1C, a gene encoding a shared POLR1 and POLR3 subunit, also mutated in some Treacher Collins syndrome (TCS) cases. Using shotgun proteomics and ChIP sequencing, we demonstrate that leukodystrophy-causative mutations, but not TCS mutations, in POLR1C impair assembly and nuclear import of POLR3, but not POLR1, leading to decreased binding to POLR3 target genes. This study is …