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Virginia Commonwealth University

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2011

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Full-Text Articles in Medicine and Health Sciences

Genome-Wide Gene-Environment Study Identifies Glutamate Receptor Gene Grin2a As A Parkinson's Disease Modifier Gene Via Interaction With Coffee, Taye H. Hamza, Honglei Chen, Erin M. Hill-Burns, Shannon L. Rhodes, Jennifer Montimurro, Denise M. Kay, Albert Tenesa, Victoria I. Kusel, Patricia Sheehan, Muthukrishnan Eaaswarkhanth, Dora Yearout, Ali Samii, John W. Roberts, Pinky Agarwal, Yvette Bordelon, Yikyung Park, Liyong Wang, Jianjun Gao, Jeffery M. Vance, Kenneth S. Kendler, Silviu-Alin Bacanu, William K. Scott, Beate Ritz, John Nutt, Stweart A. Factor, Cyrus P. Zabetian, Haydeh Payami Jan 2011

Genome-Wide Gene-Environment Study Identifies Glutamate Receptor Gene Grin2a As A Parkinson's Disease Modifier Gene Via Interaction With Coffee, Taye H. Hamza, Honglei Chen, Erin M. Hill-Burns, Shannon L. Rhodes, Jennifer Montimurro, Denise M. Kay, Albert Tenesa, Victoria I. Kusel, Patricia Sheehan, Muthukrishnan Eaaswarkhanth, Dora Yearout, Ali Samii, John W. Roberts, Pinky Agarwal, Yvette Bordelon, Yikyung Park, Liyong Wang, Jianjun Gao, Jeffery M. Vance, Kenneth S. Kendler, Silviu-Alin Bacanu, William K. Scott, Beate Ritz, John Nutt, Stweart A. Factor, Cyrus P. Zabetian, Haydeh Payami

Psychiatry Publications

Our aim was to identify genes that influence the inverse association of coffee with the risk of developing Parkinson's disease (PD). We used genome-wide genotype data and lifetime caffeinated-coffee-consumption data on 1,458 persons with PD and 931 without PD from the NeuroGenetics Research Consortium (NGRC), and we performed a genome-wide association and interaction study (GWAIS), testing each SNP's main-effect plus its interaction with coffee, adjusting for sex, age, and two principal components. We then stratified subjects as heavy or light coffee-drinkers and performed genome-wide association study (GWAS) in each group. We replicated the most significant SNP. Finally, we imputed the …


Acsl6 Is Associated With The Number Of Cigarettes Smoked And Its Expression Is Altered By Chronic Nicotine Exposure, Jingchun Chen, Darlene H. Brunzell, Kia J. Jackson, Andrew Van Der Vaart, Jennie Z. Ma, Thomas J. Payne, Richard Sherva, Lindsay A. Farrer, Pablo Gejman, Douglas F. Levinson, Peter Holmans, Steven H. Aggen, Imad Damaj, Po-Hsiu Kuo, Bradley T. Webb, Raymond Anton, Henry R. Kranzler, Joel Gelemter, Minf D. Li, Kenneth S. Kendler, Xiangning Chen Jan 2011

Acsl6 Is Associated With The Number Of Cigarettes Smoked And Its Expression Is Altered By Chronic Nicotine Exposure, Jingchun Chen, Darlene H. Brunzell, Kia J. Jackson, Andrew Van Der Vaart, Jennie Z. Ma, Thomas J. Payne, Richard Sherva, Lindsay A. Farrer, Pablo Gejman, Douglas F. Levinson, Peter Holmans, Steven H. Aggen, Imad Damaj, Po-Hsiu Kuo, Bradley T. Webb, Raymond Anton, Henry R. Kranzler, Joel Gelemter, Minf D. Li, Kenneth S. Kendler, Xiangning Chen

Psychiatry Publications

Individuals with schizophrenia tend to be heavy smokers and are at high risk for tobacco dependence. However, the nature of the comorbidity is not entirely clear. We previously reported evidence for association of schizophrenia with SNPs and SNP haplotypes in a region of chromosome 5q containing the SPEC2, PDZ-GEF2 and ACSL6 genes. In this current study, analysis of the control subjects of the Molecular Genetics of Schizophrenia (MGS) sample showed similar pattern of association with number of cigarettes smoked per day (numCIG) for the same region. To further test if this locus is associated with tobacco smoking as measured …


Genomic Analysis Of Individual Differences In Ethanol Drinking: Evidence For Non-Genetic Factors In C57bl/6 Mice, Jennifer T. Wolstenholme, Jon A. Warner, Maria I. Capparuccini, Kellie J. Archer, Keith L. Shelton, Michael F. Miles Jan 2011

Genomic Analysis Of Individual Differences In Ethanol Drinking: Evidence For Non-Genetic Factors In C57bl/6 Mice, Jennifer T. Wolstenholme, Jon A. Warner, Maria I. Capparuccini, Kellie J. Archer, Keith L. Shelton, Michael F. Miles

Pharmacology and Toxicology Publications

Genetic analysis of factors affecting risk to develop excessive ethanol drinking has been extensively studied in humans and animal models for over 20 years. However, little progress has been made in determining molecular mechanisms underlying environmental or non-genetic events contributing to variation in ethanol drinking. Here, we identify persistent and substantial variation in ethanol drinking behavior within an inbred mouse strain and utilize this model to identify gene networks influencing such “non-genetic” variation in ethanol intake. C57BL/6NCrl mice showed persistent inter-individual variation of ethanol intake in a two-bottle choice paradigm over a three-week period, ranging from less than 1 g/kg …


Influence Of Continuous Venovenous Hemofiltration And Continuous Venovenous Hemodiafiltration On The Disposition Of Doripenem, Iolanda Cirillo, Nicole Vaccaro, Dainius Balis, Rebecca Redman, Gary R. Matzke Jan 2011

Influence Of Continuous Venovenous Hemofiltration And Continuous Venovenous Hemodiafiltration On The Disposition Of Doripenem, Iolanda Cirillo, Nicole Vaccaro, Dainius Balis, Rebecca Redman, Gary R. Matzke

Pharmacotherapy and Outcomes Science Publications

The pharmacokinetics, safety, and tolerability of a single 1-hour, 500-mg intravenous infusion of doripenem were assessed in dialysis-dependent subjects with stage 5 chronic kidney disease undergoing continuous renal replacement therapy (CRRT) via 12-hour continuous venovenous hemofiltration (CVVH) (n = 6) or continuous venovenous hemodiafiltration (CVVHDF) (n = 5). Healthy volunteers were also assessed (n = 12). Concentrations of doripenem and the primary metabolite doripenem-M-1 were measured in plasma and ultrafiltrate or ultrafiltrate/dialysate by a validated liquid chromatography-tandem mass spectrometry method. In dialysis-dependent subjects, levels of systemic exposure to doripenem and doripenem-M-1 were approximately 3- and 5-fold greater, respectively, than those …


Applying An Empirical Hydropathic Forcefield In Refinement May Improve Low-Resolution Protein X-Ray Crystal Structures, Vishal N. Koparde, J. Neel Scarsdale, Glen E. Kellogg Jan 2011

Applying An Empirical Hydropathic Forcefield In Refinement May Improve Low-Resolution Protein X-Ray Crystal Structures, Vishal N. Koparde, J. Neel Scarsdale, Glen E. Kellogg

Medicinal Chemistry Publications

Background

The quality of X-ray crystallographic models for biomacromolecules refined from data obtained at high-resolution is assured by the data itself. However, at low-resolution, >3.0 Å, additional information is supplied by a forcefield coupled with an associated refinement protocol. These resulting structures are often of lower quality and thus unsuitable for downstream activities like structure-based drug discovery.

Methodology

An X-ray crystallography refinement protocol that enhances standard methodology by incorporating energy terms from the HINT (Hydropathic INTeractions) empirical forcefield is described. This protocol was tested by refining synthetic low-resolution structural data derived from 25 diverse high-resolution structures, and referencing the resulting …


Ten Year Trends (1992 To 2002) In Sociodemographic Predictors And Indicators Of Alcohol Abuse And Dependence Among Whites, Blacks, And Hispanics In The U.S, Raul Caetano, Jonali Baruah, Karen G. Chartier Jan 2011

Ten Year Trends (1992 To 2002) In Sociodemographic Predictors And Indicators Of Alcohol Abuse And Dependence Among Whites, Blacks, And Hispanics In The U.S, Raul Caetano, Jonali Baruah, Karen G. Chartier

Social Work Publications

Background

The objective of this paper is to examine 10-year trends (1992–2002) in the number and type of indicators of DSM-IV abuse and dependence among Whites, Blacks and Hispanics in the U.S.

Methods

Data are from the 1991–1992 National Longitudinal Alcohol Epidemiologic Survey (NLAES; n = 42,862) and the 2001–2002 National Epidemiologic Study on Alcohol and Related Conditions (NESARC; n = 43,093). Both surveys used multistage cluster sample procedures to select respondents 18 years of age and older from the U.S. household population.

Results

Increases in the prevalence of alcohol abuse between 1992 and 2002seem associated to a rise in …


Faculty Impressions Of Dental Students’ Performance With And Without Virtual Reality Simulation, Riki Gottlieb, Sharon K. Lanning, John C. Gunsolley, Judith A. Buchanan Jan 2011

Faculty Impressions Of Dental Students’ Performance With And Without Virtual Reality Simulation, Riki Gottlieb, Sharon K. Lanning, John C. Gunsolley, Judith A. Buchanan

Periodontics Publications

This study compared faculty perceptions and expectations of dental students’ abilities using virtual reality simulation (VRS) to those who did not use virtual reality simulation (non-VRS) in an operative dentistry preclinical course. A sixteen-item survey with a ten-point rating scale and three open-ended questions asked about students’ abilities in ergonomics, confidence level, performance, preparation, and self-assessment. The surveys were administered three times to a small group of preclinical faculty members. First, faculty members (n=12, 92 percent response rate) gave their perceptions of non-VRS students’ abilities at the end of their traditional course. Secondly, faculty members (n=13, 100 percent response rate) …


Genetic Analysis Of The Neurosteroid Deoxycorticosterone And Its Relation To Alcohol Phenotypes: Identification Of Qtls And Downstream Gene Regulation, Patrizia Porcu, Todd K. O'Buckley, Soomin C. Song, Jo Lynne Harenza, Lu Lu, Xusheng Wang, Michael F. Miles, A. Leslie Morrow Jan 2011

Genetic Analysis Of The Neurosteroid Deoxycorticosterone And Its Relation To Alcohol Phenotypes: Identification Of Qtls And Downstream Gene Regulation, Patrizia Porcu, Todd K. O'Buckley, Soomin C. Song, Jo Lynne Harenza, Lu Lu, Xusheng Wang, Michael F. Miles, A. Leslie Morrow

Neurology Publications

Background

Deoxycorticosterone (DOC) is an endogenous neurosteroid found in brain and serum, precursor of the GABAergic neuroactive steroid (3α,5α)-3,21-dihydroxypregnan-20-one (tetrahydrodeoxycorticosterone, THDOC) and the glucocorticoid corticosterone. These steroids are elevated following stress or ethanol administration, contribute to ethanol sensitivity, and their elevation is blunted in ethanol dependence.

Methodology/Principal Findings

To systematically define the genetic basis, regulation, and behavioral significance of DOC levels in plasma and cerebral cortex we examined such levels across 47 young adult males from C57BL/6J (B6)×DBA/2J (D2) (BXD) mouse strains for quantitative trait loci (QTL) and bioinformatics analyses of behavior and gene regulation. Mice were injected with saline …


Air Pollution & The Brain: Subchronic Diesel Exhaust Exposure Causes Neuroinflammation And Elevates Early Markers Of Neurodegenerative Disease, Shannon Levesque, Michael J. Surace, Jacob Mcdonald, Michelle L. Block Jan 2011

Air Pollution & The Brain: Subchronic Diesel Exhaust Exposure Causes Neuroinflammation And Elevates Early Markers Of Neurodegenerative Disease, Shannon Levesque, Michael J. Surace, Jacob Mcdonald, Michelle L. Block

Anatomy and Neurobiology Publications

Background

Increasing evidence links diverse forms of air pollution to neuroinflammation and neuropathology in both human and animal models, but the effects of long-term exposures are poorly understood.

Objective

We explored the central nervous system consequences of subchronic exposure to diesel exhaust (DE) and addressed the minimum levels necessary to elicit neuroinflammation and markers of early neuropathology.

Methods

Male Fischer 344 rats were exposed to DE (992, 311, 100, 35 and 0 μg PM/m3) by inhalation over 6 months.

Results

DE exposure resulted in elevated levels of TNFα at high concentrations in all regions tested, with the exception …


Chronic Apocynin Treatment Attenuates Beta Amyloid Plaque Size And Microglial Number In Happ(751)Sl Mice, Melinda E. Lull, Shannon Levesque, Michael J. Surace, Michelle L. Block Jan 2011

Chronic Apocynin Treatment Attenuates Beta Amyloid Plaque Size And Microglial Number In Happ(751)Sl Mice, Melinda E. Lull, Shannon Levesque, Michael J. Surace, Michelle L. Block

Anatomy and Neurobiology Publications

Background

NADPH oxidase is implicated in neurotoxic microglial activation and the progressive nature of Alzheimer's Disease (AD). Here, we test the ability of two NADPH oxidase inhibitors, apocynin and dextromethorphan (DM), to reduce learning deficits and neuropathology in transgenic mice overexpressing human amyloid precursor protein with the Swedish and London mutations (hAPP(751)SL).

Methods

Four month old hAPP(751)SL mice were treated daily with saline, 15 mg/kg DM, 7.5 mg/kg DM, or 10 mg/kg apocynin by gavage for four months.

Results

Only hAPP(751)SL mice treated with apocynin showed reduced plaque size and a reduction in the number of cortical microglia, when compared …


The Streptococcus Sanguinis Competence Regulon Is Not Required For Infective Endocarditis Virulence In A Rabbit Model, Jill E. Callahan, Cindy L. Munro, Todd Kitten Jan 2011

The Streptococcus Sanguinis Competence Regulon Is Not Required For Infective Endocarditis Virulence In A Rabbit Model, Jill E. Callahan, Cindy L. Munro, Todd Kitten

Philips Institute for Oral Health Research Publications

Streptococcus sanguinis is an important component of dental plaque and a leading cause of infective endocarditis. Genetic competence in S. sanguinis requires a quorum sensing system encoded by the early comCDE genes, as well as late genes controlled by the alternative sigma factor, ComX. Previous studies of Streptococcus pneumoniae and Streptococcus mutans have identified functions for the >100-gene com regulon in addition to DNA uptake, including virulence. We investigated this possibility in S. sanguinis. Strains deleted for the comCDE orcomX master regulatory genes were created. Using a rabbit endocarditis model in conjunction with a variety of virulence assays, …


Fto And Mc4r Gene Variants Are Associated With Obesity In Polycystic Ovary Syndrome, Kathryn G. Ewens, Michelle R. Jones, Wendy Ankener, Douglas R. Stewart, Margrit Urbanek, Andrea Dunaif, Richard S. Legro, Angela Chua, Ricardo Azziz, Richard S. Spielman, Mark O. Goodarzi, Jerome F. Strauss Iii Jan 2011

Fto And Mc4r Gene Variants Are Associated With Obesity In Polycystic Ovary Syndrome, Kathryn G. Ewens, Michelle R. Jones, Wendy Ankener, Douglas R. Stewart, Margrit Urbanek, Andrea Dunaif, Richard S. Legro, Angela Chua, Ricardo Azziz, Richard S. Spielman, Mark O. Goodarzi, Jerome F. Strauss Iii

Obstetrics and Gynecology Publications

Polycystic ovary syndrome (PCOS) is the leading cause of anovulatory infertility in women. It is also associated with metabolic disturbances that place women at increased risk for obesity and type 2 diabetes. There is strong evidence for familial clustering of PCOS and a genetic predisposition. However, the gene(s) responsible for the PCOS phenotypes have not been elucidated. This two-phase family-based and case-control genetic study was designed to address the question of whether SNPs identified as susceptibility loci for obesity in genome-wide association studies (GWAS) are also associated with PCOS and elevated BMI. Members of 439 families having at least one …


3d Mapping Of The Spry2 Domain Of Ryanodine Receptor 1 By Single-Particle Cryo-Em, Alex Peralvaerz-Marin, Hanshen Tae, Phillip G. Board, Marco G. Casarotto, Angela F. Dulhunty, Montserrat Samsó Jan 2011

3d Mapping Of The Spry2 Domain Of Ryanodine Receptor 1 By Single-Particle Cryo-Em, Alex Peralvaerz-Marin, Hanshen Tae, Phillip G. Board, Marco G. Casarotto, Angela F. Dulhunty, Montserrat Samsó

Physiology and Biophysics Publications

The type 1 skeletal muscle ryanodine receptor (RyR1) is principally responsible for Ca2+release from the sarcoplasmic reticulum and for the subsequent muscle contraction. The RyR1 contains three SPRY domains. SPRY domains are generally known to mediate protein-protein interactions, however the location of the three SPRY domains in the 3D structure of the RyR1 is not known. Combining immunolabeling and single-particle cryo-electron microscopy we have mapped the SPRY2 domain (S1085-V1208) in the 3D structure of RyR1 using three different antibodies against the SPRY2 domain. Two obstacles for the image processing procedure; limited amount of data and signal dilution introduced by the …


State-Dependent Camp Binding To Functioning Hcn Channels Studied By Patch-Clamp Fluorometry, Shengjun Wu, Zhanna V. Vysotskaya, Xinping Xu, Changan Xie, Qinglian Liu, Lei Zhou Jan 2011

State-Dependent Camp Binding To Functioning Hcn Channels Studied By Patch-Clamp Fluorometry, Shengjun Wu, Zhanna V. Vysotskaya, Xinping Xu, Changan Xie, Qinglian Liu, Lei Zhou

Physiology and Biophysics Publications

Abstract

One major goal of ion channel research is to delineate the molecular events from the detection of the stimuli to the movement of channel gates. For ligand-gated channels, it is challenging to separate ligand binding from channel gating. Here we studied the cyclic adenosine monophosphate (cAMP)-dependent gating in hyperpolarization-activated cAMP-regulated (HCN) channel by simultaneously recording channel opening and ligand binding, using the patch-clamp fluorometry technique with a unique fluorescent cAMP analog that fluoresces strongly in the hydrophobic binding pocket and exerts regulatory effects on HCN channels similar to those imposed by cAMP. Corresponding to voltage-dependent channel activation, we observed …


Cholesterol Sensitivity Of Kir2.1 Is Controlled By A Belt Of Residues Around The Cytosolic Pore, Avia Rosenhouse-Dantsker, Diomedes E. Logothetis, Irena Levitan Jan 2011

Cholesterol Sensitivity Of Kir2.1 Is Controlled By A Belt Of Residues Around The Cytosolic Pore, Avia Rosenhouse-Dantsker, Diomedes E. Logothetis, Irena Levitan

Physiology and Biophysics Publications

Abstract

Kir channels play an important role in setting the resting membrane potential and modulating membrane excitability. A common feature of several Kir channels is that they are regulated by cholesterol. Yet, the mechanism by which cholesterol affects channel function is unclear. We recently showed that the cholesterol sensitivity of Kir2 channels depends on several CD-loop residues. Here we show that this cytosolic loop is part of a regulatory site that also includes residues in the G-loop, the N-terminus, and the connecting segment between the C-terminus and the inner transmembrane helix. Together, these residues form a cytosolic belt that surrounds …


Challenges And Benefits Of Using A Virtual Community To Explore Nursing Concepts Among Baccalaureate Nursing Students, Linnea L. Carlson-Sabelli, Jean F. Giddens, Louis Fogg, Ruth A. Fiedler Jan 2011

Challenges And Benefits Of Using A Virtual Community To Explore Nursing Concepts Among Baccalaureate Nursing Students, Linnea L. Carlson-Sabelli, Jean F. Giddens, Louis Fogg, Ruth A. Fiedler

School of Nursing Publications

This research study examines learner perceptions of benefits and challenges associated with the Neighborhood (NBH), an innovative pedagogy that fosters learner engagement and integration of nursing concepts using a “virtual community” as an alternative to lecture. First-semester students from five baccalaureate nursing programs that used the NBH intervention were divided into high (N = 78) and low faculty use (N = 203) groups. Qualitative analysis revealed that the NBH intervention promoted application of concepts to real life situation was engaging and “eye-opening,” allowing students to understand health care issues from a variety of perspectives. A major challenge was busy work …


Tryptophan Degradation In Women With Breast Cancer: A Pilot Study, Debra E. Lyon, Jeanne M. Walter, Angela R. Starkweather, Christine M. Schubert, Nancy L. Mccain Jan 2011

Tryptophan Degradation In Women With Breast Cancer: A Pilot Study, Debra E. Lyon, Jeanne M. Walter, Angela R. Starkweather, Christine M. Schubert, Nancy L. Mccain

School of Nursing Publications

Background

Altered tryptophan metabolism and indoleamine 2,3-dioxygenase activity are linked to cancer development and progression. In addition, these biological factors have been associated with the development and severity of neuropsychiatric syndromes, including major depressive disorder. However, this biological mechanism associated with both poor disease outcomes and adverse neuropsychiatric symptoms has received little attention in women with breast cancer. Therefore, a pilot study was undertaken to compare levels of tryptophan and other proteins involved in tryptophan degradation in women with breast cancer to women without cancer, and secondarily, to examine levels in women with breast caner over the course of chemotherapy. …


Decreasing Mortality In Severe Sepsis And Septic Shock Patients By Implementing A Sepsis Bundle In A Hospital Setting, Sandra C. P. L. Shiramizo, Alexandre R. Marra, Marcelino S. Durao, Angela T. Paes, Michael B. Edmond, Oscar Fernando Pavao Dos Santos Jan 2011

Decreasing Mortality In Severe Sepsis And Septic Shock Patients By Implementing A Sepsis Bundle In A Hospital Setting, Sandra C. P. L. Shiramizo, Alexandre R. Marra, Marcelino S. Durao, Angela T. Paes, Michael B. Edmond, Oscar Fernando Pavao Dos Santos

Internal Medicine Publications

Background

The Surviving Sepsis Campaign (SSC) guidelines for the management of severe sepsis (SS) and septic shock (SSh) have been recommended to reduce morbidity and mortality.

Materials and Methods

A quasi-experimental study was conducted in a medical-surgical ICU. Multiple interventions to optimize SS and SSh shock patients' clinical outcomes were performed by applying sepsis bundles (6- and 24-hour) in May 2006. We compared bundle compliance and patient outcomes before (July 2005-April 2006) and after (May 2006-December 2009) implementation of the interventions.

Results

A total of 564 SS and SSh patients were identified. Prior to the intervention, compliance with the 6 …


The Living Textbook Project For Affordable Higher Education, Dayanjan S. Wijesinghe Jan 2011

The Living Textbook Project For Affordable Higher Education, Dayanjan S. Wijesinghe

Surgery Presentations

A blue print for ensuring that community college education remains affordable to the future generations via elimination of the cost of textbooks.


Bound Water At Protein-Protein Interfaces: Partners, Roles And Hydrophobic Bubbles As A Conserved Motif, Mostafa H. Ahmed, Francesca Spyrakis, Pietro Cozzini, Parijat K. Tripathi, Andrea Mozzarelli, J. Neel Scarsdale, Martin A. Safo, Glen E. Kellogg Jan 2011

Bound Water At Protein-Protein Interfaces: Partners, Roles And Hydrophobic Bubbles As A Conserved Motif, Mostafa H. Ahmed, Francesca Spyrakis, Pietro Cozzini, Parijat K. Tripathi, Andrea Mozzarelli, J. Neel Scarsdale, Martin A. Safo, Glen E. Kellogg

Medicinal Chemistry Publications

Background

There is a great interest in understanding and exploiting protein-protein associations as new routes for treating human disease. However, these associations are difficult to structurally characterize or model although the number of X-ray structures for protein-protein complexes is expanding. One feature of these complexes that has received little attention is the role of water molecules in the interfacial region.

Methodology

A data set of 4741 water molecules abstracted from 179 high-resolution (≤ 2.30 Å) X-ray crystal structures of protein-protein complexes was analyzed with a suite of modeling tools based on the HINT forcefield and hydrogen-bonding geometry. A metric termed …


Ventricular Tachyarrhythmias After Cardiac Arrest In Public Versus At Home, Myron L. Weisfeldt, Siobahn Everson-Stewart, Colleen Sitlani, Thomas Rea, Tom P. Aufderheide, Diane L. Atkins, Blair Bigham, Steven C. Brooks, Christopher Foerster, Randal Gray, Joseph P. Ornato, Judy Powell, Peter J. Kudenchuk, Laurie J. Morrison Jan 2011

Ventricular Tachyarrhythmias After Cardiac Arrest In Public Versus At Home, Myron L. Weisfeldt, Siobahn Everson-Stewart, Colleen Sitlani, Thomas Rea, Tom P. Aufderheide, Diane L. Atkins, Blair Bigham, Steven C. Brooks, Christopher Foerster, Randal Gray, Joseph P. Ornato, Judy Powell, Peter J. Kudenchuk, Laurie J. Morrison

Emergency Medicine Publications

Background

The incidence of ventricular fibrillation or pulseless ventricular tachycardia as the first recorded rhythm after out-of-hospital cardiac arrest has unexpectedly declined. The success of bystander-deployed automated external defibrillators (AEDs) in public settings suggests that this may be the more common initial rhythm when outof-hospital cardiac arrest occurs in public. We conducted a study to determine whether the location of the arrest, the type of arrhythmia, and the probability of survival are associated.

Methods

Between 2005 and 2007, we conducted a prospective cohort study of out-of-hospital cardiac arrest in adults in 10 North American communities. We assessed the frequencies of …


Early Versus Later Rhythm Analysis In Patients With Out-Of-Hospital Cardiac Arrest, Ian G. Stiell, Graham Nichol, Brian G. Leroux, Thomas D. Rea, Joseph P. Ornato, Judy Powell, James Christenson, Clifton W. Callaway, Peter J. Kudenchuk, Tom P. Aufderheide, Ahamed H. Idris, Mohamud R. Daya, Henry E. Wang, Laurie J. Morrison, Daniel Davis, Douglas Andrusiek, Shannon Stephens, Sheldon Cheskes, Robert H. Schmicker, Ray Fowler, Christian Vaillancourt, David Hostler, Dana Zive, Ronald G. Pirrallo, Gary M. Vilke, George Sopko, Myron Weisfeldt Jan 2011

Early Versus Later Rhythm Analysis In Patients With Out-Of-Hospital Cardiac Arrest, Ian G. Stiell, Graham Nichol, Brian G. Leroux, Thomas D. Rea, Joseph P. Ornato, Judy Powell, James Christenson, Clifton W. Callaway, Peter J. Kudenchuk, Tom P. Aufderheide, Ahamed H. Idris, Mohamud R. Daya, Henry E. Wang, Laurie J. Morrison, Daniel Davis, Douglas Andrusiek, Shannon Stephens, Sheldon Cheskes, Robert H. Schmicker, Ray Fowler, Christian Vaillancourt, David Hostler, Dana Zive, Ronald G. Pirrallo, Gary M. Vilke, George Sopko, Myron Weisfeldt

Emergency Medicine Publications

Background

In a departure from the previous strategy of immediate defibrillation, the 2005 resuscitation guidelines from the American Heart Association–International Liaison Committee on Resuscitation suggested that emergency medical service (EMS) personnel could provide 2 minutes of cardiopulmonary resuscitation (CPR) before the first analysis of cardiac rhythm. We compared the strategy of a brief period of CPR with early analysis of rhythm with the strategy of a longer period of CPR with delayed analysis of rhythm.

Methods

We conducted a cluster-randomized trial involving adults with out-of-hospital cardiac arrest at 10 Resuscitation Outcomes Consortium sites in the United States and Canada. Patients …


A Trial Of An Impedance Threshold Device In Out-Of-Hospital Cardiac Arrest, Tom P. Aufderheide, Graham Nichol, Thomas D. Rea, Siobhan P. Brown, Brian G. Leroux, Paul E. Pepe, Peter J. Kudenchuk, Jim Christenson, Mohamud R. Daya, Paul Dorian, Clifton W. Callaway, Ahamed H. Idris, Douglas Andrusiek, Shannon W. Stephens, David Hostler, Daniel Davis, James V. Dunford, Ronald G. Pirrallo, Ian G. Stiell, Catherine M. Clement, Alan Craig, Lois Van Ottingham, Terri A. Schmidt, Henry E. Wang, Myron L. Weistfeldt, Joseph P. Ornato, George Sopko Jan 2011

A Trial Of An Impedance Threshold Device In Out-Of-Hospital Cardiac Arrest, Tom P. Aufderheide, Graham Nichol, Thomas D. Rea, Siobhan P. Brown, Brian G. Leroux, Paul E. Pepe, Peter J. Kudenchuk, Jim Christenson, Mohamud R. Daya, Paul Dorian, Clifton W. Callaway, Ahamed H. Idris, Douglas Andrusiek, Shannon W. Stephens, David Hostler, Daniel Davis, James V. Dunford, Ronald G. Pirrallo, Ian G. Stiell, Catherine M. Clement, Alan Craig, Lois Van Ottingham, Terri A. Schmidt, Henry E. Wang, Myron L. Weistfeldt, Joseph P. Ornato, George Sopko

Emergency Medicine Publications

Background

The impedance threshold device (ITD) is designed to enhance venous return and cardiac output during cardiopulmonary resuscitation (CPR) by increasing the degree of negative intrathoracic pressure. Previous studies have suggested that the use of an ITD during CPR may improve survival rates after cardiac arrest.

Methods

We compared the use of an active ITD with that of a sham ITD in patients with out-ofhospital cardiac arrest who underwent standard CPR at 10 sites in the United States and Canada. Patients, investigators, study coordinators, and all care providers were unaware of the treatment assignments. The primary outcome was survival to …


Right Ventricular Dysfunction Following Acute Myocardial Infarction In The Absence Of Pulmonary Hypertension In The Mouse, Stefano Toldo, Herman J. Bogaard, Benjamin W. Van Tassell, Eleonora Mezzaroma, Ignacio M. Seropian, Roshanak Robati, Fadi N. Salloum, Norbert F. Voelkel, Antonio Abbate Jan 2011

Right Ventricular Dysfunction Following Acute Myocardial Infarction In The Absence Of Pulmonary Hypertension In The Mouse, Stefano Toldo, Herman J. Bogaard, Benjamin W. Van Tassell, Eleonora Mezzaroma, Ignacio M. Seropian, Roshanak Robati, Fadi N. Salloum, Norbert F. Voelkel, Antonio Abbate

VCU Health Publications

Background

Cardiac remodelling after AMI is characterized by molecular and cellular mechanisms involving both the ischemic and non-ischemic myocardium. The extent of right ventricular (RV) dilatation and dysfunction and its relation to pulmonary hypertension (PH) following AMI are unknown. The aim of the current study was to evaluate changes in dimensions and function of the RV following acute myocardial infarction (AMI) involving the left ventricle (LV).

Methods

We assessed changes in RV dimensions and function 1 week following experimental AMI involving the LV free wall in 10 mice and assessed for LV and RV dimensions and function and for the …


Alterations In The Interleukin-1/Interleukin-1 Receptor Antagonist Balance Modulate Cardiac Remodeling Following Myocardial Infarction In The Mouse, Antonio Abbate, Fadi N. Salloum, Benjamin W. Van Tassell, Elena Vecile, Stefano Toldo, Ignacio M. Seropian, Eleonora Mezzaroma, Aldo Dobrina Jan 2011

Alterations In The Interleukin-1/Interleukin-1 Receptor Antagonist Balance Modulate Cardiac Remodeling Following Myocardial Infarction In The Mouse, Antonio Abbate, Fadi N. Salloum, Benjamin W. Van Tassell, Elena Vecile, Stefano Toldo, Ignacio M. Seropian, Eleonora Mezzaroma, Aldo Dobrina

VCU Health Publications

Background

Healing after acute myocardial infarction (AMI) is characterized by an intense inflammatory response and increased Interleukin-1 (IL-1) tissue activity. Genetically engineered mice lacking the IL-1 receptor (IL-1R1-/-, not responsive to IL-1) or the IL-1 receptor antagonist (IL-1Ra, enhanced response to IL-1) have an altered IL-1/IL-1Ra balance that we hypothesize modulates infarct healing and cardiac remodeling after AMI.

Methods

IL-1R1-/- and IL-1Ra-/- male mice and their correspondent wild-types (WT) were subjected to permanent coronary artery ligation or sham surgery. Infarct size (trichrome scar size), apoptotic cell death (TUNEL) and left ventricular (LV) dimensions and function (echocardiography) were measured prior to …


Development Of Melanopsin-Based Irradiance Detecting Circuitry, David S. Mcneill, Catherine J. Sheely, Jennifer L. Ecker, Tudor C. Badea, Duncan Morhardt, William Guido, Samer Hattar Jan 2011

Development Of Melanopsin-Based Irradiance Detecting Circuitry, David S. Mcneill, Catherine J. Sheely, Jennifer L. Ecker, Tudor C. Badea, Duncan Morhardt, William Guido, Samer Hattar

Anatomy and Neurobiology Publications

Background

Most retinal ganglion cells (RGCs) convey contrast and motion information to visual brain centers. Approximately 2% of RGCs are intrinsically photosensitive (ipRGCs), express melanopsin and are necessary for light to modulate specific physiological processes in mice. The ipRGCs directly target the suprachiasmatic nucleus (SCN) to photoentrain circadian rhythms, and the olivary pretectal nucleus (OPN) to mediate the pupillary light response. How and when this ipRGC circuitry develops is unknown.

Results

Here, we show that some ipRGCs follow a delayed developmental time course relative to other image-forming RGCs. Specifically, ipRGC neurogenesis extends beyond that of other RGCs, and ipRGCs begin …


Forever Young, Edward F. Ansello Jan 2011

Forever Young, Edward F. Ansello

Director's Editorials from Age in Action

Gerontologists theorize that each of us is shaped by the influences of cohort and historical time. If there's a oneness of who we were and who we are, then Bob Dylan's music is in many of us. Forever Young is not a paean to age denial. Rather, it seems to invoke virtues or characteristics that never grow old: charity to others, acceptance of kindness, hope, righteousness, courage, fortitude, industriousness, and joy.


Falls, Edward F. Ansello Jan 2011

Falls, Edward F. Ansello

Director's Editorials from Age in Action

Falls are common, affecting about one third of community-dwelling adults over age 65 and about half over age 80. The risk factors for falling are complex, and falls may themselves be a signal for other troubling conditions. When fear of falling emerges as an issue for some elders, they are likely to reduce their activities, thinking that this will reduce their risk, and isolation and depression can ensue. There are teaching roles for nurses, physicians, and physical therapists in sharing with other professions how to assess gait, vision, or dizziness.


Baby Boomers And Stereotypes, Edward F. Ansello Jan 2011

Baby Boomers And Stereotypes, Edward F. Ansello

Director's Editorials from Age in Action

With age we become more and more like ourselves. This would mean millions and millions of individual Baby Boomers, each with his or her own characteristics and life trajectory. Stereotyping would, therefore, be wrong, but it is happening.


The Most Terrible Poverty, Edward F. Ansello Jan 2011

The Most Terrible Poverty, Edward F. Ansello

Director's Editorials from Age in Action

Caring, private individuals and agency employees and volunteers in "direct" or "human" services regularly deliver what can be called love, the antidote to the poverty of loneliness. Let's acknowledge the essential importance of people in various forms of human services who reach out to others who are alone.