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Articles 61 - 73 of 73
Full-Text Articles in COVID-19
Covid-19 Pandemic Through The Lens Of A Gastroenterology Fellow, Raj Shah, Sagarika Satyavada, Mayada Ismail, Michael Kurin, Zachary L. Smith, Gregory S. Cooper, Amitabh Chak
Covid-19 Pandemic Through The Lens Of A Gastroenterology Fellow, Raj Shah, Sagarika Satyavada, Mayada Ismail, Michael Kurin, Zachary L. Smith, Gregory S. Cooper, Amitabh Chak
Faculty Scholarship
On Tuesday, March 10, 2020, an institutional e-mail sent from our hospital president confirmed the first 3 cases of the novel coronavirus disease 2019 (COVID-19) in our healthcare system. Twenty-four hours later, we learned that one of our co-fellows had been exposed and was forced into self-quarantine. Suddenly, what had seemed to be a distant problem hit close to home. As we sat around the “fellows’ room” (socially distanced as much as possible in the luxurious expanse that is common to fellows’ quarters), the uncertainty about our future raised several questions. How would we be impacted as we journeyed through …
Aga Institute Rapid Recommendations For Gastrointestinal Procedures During The Covid-19 Pandemic, Perica Davitkov, Yngve Falck-Ytter
Aga Institute Rapid Recommendations For Gastrointestinal Procedures During The Covid-19 Pandemic, Perica Davitkov, Yngve Falck-Ytter
Faculty Scholarship
Multiple questions have been raised regarding the GI and liver manifestations of COVID-19 infection and the implications of SARS-CoV-2 infection on GI endoscopy. A joint society statement by the American Gastroenterological Association (AGA), the American Association for the Study of Liver Diseases, the American College of Gastroenterology, and the American Society for Gastrointestinal Endoscopy on March 15, 2020 highlighted the potential for SARS-CoV-2 transmission through droplets, an established mode of transmission, and possibly fecal shedding, and the associated risk for transmission to endoscopy personnel during GI endoscopy procedures. In this document, we seek to summarize the data and provide evidence-based …
Unprecedented Solutions For Extraordinary Times: Helping Long-Term Care Settings Deal With The Covid-19 Pandemic, Robin L.P. Jump
Unprecedented Solutions For Extraordinary Times: Helping Long-Term Care Settings Deal With The Covid-19 Pandemic, Robin L.P. Jump
Faculty Scholarship
No abstract provided.
Role Of Changes In Sars-Cov-2 Spike Protein In The Interaction With The Human Ace2 Receptor: An In Silico Analysis, Joseph Thomas Ortega
Role Of Changes In Sars-Cov-2 Spike Protein In The Interaction With The Human Ace2 Receptor: An In Silico Analysis, Joseph Thomas Ortega
Faculty Scholarship
Many human viral diseases are a consequence of a zoonotic event. Some of the diseases caused by these zoono- tic events have affected millions of people around the world, some of which have resulted in high rates of mor- bidity/mortality in humans. Changes in the viral proteins that function as ligands of the host receptor may pro- mote the spillover between species. The most recent of these zoonotic events that have caused an ongoing epi- demic of high magnitude is the Covid-19 epidemics caused by SARS-CoV-2. The aim of this study was to de- termine the mutation(s) in the sequence …
Unrevealing Sequence And Structural Features Of Novel Coronavirus Using In Silico Approaches: The Main Protease As Molecular Target, Joseph Thomas Ortega
Unrevealing Sequence And Structural Features Of Novel Coronavirus Using In Silico Approaches: The Main Protease As Molecular Target, Joseph Thomas Ortega
Faculty Scholarship
Direct-acting antivirals are effective tools to control viral infections. SARS-CoV-2 is a coronavirus associated with the epidemiological outbreak in late 2019. Previous reports showed that HIV-1 protease inhibitors could block SARS-CoV main protease. Based on that and using an in silico approach, we evaluated SARS-CoV-2 main protease as a target for HIV-1 protease inhibitors to reveal the structural features related to their antiviral effect. Our results showed that several HIV inhibitors such as lopinavir, ritonavir, and saquinavir produce strong interaction with the active site of SARS-CoV-2 main protease. Furthermore, broad library protease inhibitors obtained from PubChem and ZINC (www.zinc.docking.org) were …
Network-Based Drug Repurposing For Novel Coronavirus 2019-Ncov/Sars-Cov-2, Yuan Hou, Feixiong Cheng
Network-Based Drug Repurposing For Novel Coronavirus 2019-Ncov/Sars-Cov-2, Yuan Hou, Feixiong Cheng
Faculty Scholarship
Human coronaviruses (HCoVs), including severe acute respiratory syndrome coronavirus (SARS-CoV) and 2019 novel coronavirus (2019-nCoV, also known as SARS-CoV-2), lead global epidemics with high morbidity and mortality. However, there are currently no effective drugs targeting 2019-nCoV/SARS-CoV-2. Drug repurposing, representing as an effective drug discovery strategy from existing drugs, could shorten the time and reduce the cost compared to de novo drug discovery. In this study, we present an integrative, antiviral drug repurposing methodology implementing a systems pharmacology-based network medicine platform, quantifying the interplay between the HCoV-host interactome and drug targets in the human protein-protein interaction network. Phylogenetic analyses of 15 …
Is Romania Ready To Face The Novel Coronavirus (Covid-19) Outbreak? The Role Of Incoming Travelers And That Of Romanian Diaspora, Iulian Gherghel
Is Romania Ready To Face The Novel Coronavirus (Covid-19) Outbreak? The Role Of Incoming Travelers And That Of Romanian Diaspora, Iulian Gherghel
Student Scholarship
Letter to editor of Travel Medicine and Infectious Disease
Risk Factors And Mortality Rates Associated With Invasive Group B Streptococcus Infections Among Patients In The Us Veterans Health Administration, Robin L.P. Jump, Brigid Wilson, Daniel Baechle, Sunah Song, Federico Perez
Risk Factors And Mortality Rates Associated With Invasive Group B Streptococcus Infections Among Patients In The Us Veterans Health Administration, Robin L.P. Jump, Brigid Wilson, Daniel Baechle, Sunah Song, Federico Perez
Faculty Scholarship
IMPORTANCE The incidence of invasive infections caused by group B Streptococcus (GBS) continues to increase in the United States. Although diabetes is a key risk factor for invasive GBS, the influence of long-term glycemic control is not well characterized; other risk factors and mortality rates associated with specific types of invasive GBS infections are unknown. OBJECTIVE To investigate risk factors and mortality rates associated with specific invasive GBS infectious syndromes. DESIGN, SETTING, AND PARTICIPANTS This cohort study used US Veterans Health Administration data to assess active users of the Veterans Affairs health care system between January 1, 2008, and December …
Improving Pneumococcal Vaccine Uptake In Veterans With Chronic Lymphocytic Leukemia Through A Virtual Clinic, Brigid M. Wilson, L. Arfons, Federico Perez, Robin L.P. Jump
Improving Pneumococcal Vaccine Uptake In Veterans With Chronic Lymphocytic Leukemia Through A Virtual Clinic, Brigid M. Wilson, L. Arfons, Federico Perez, Robin L.P. Jump
Faculty Scholarship
Through a “virtual clinic,” we used the electronic medical record to identify and intervene upon patients with chronic lymphocytic leukemia (CLL) who were not current for pneumococcal vaccines. Within 180 days, 100/160 patients (62%) received the recommended pneumococcal vaccine. A virtual clinic may improve vaccination rates among high-risk patient populations.
Randomized, Double-Blind, Placebo-Controlled Clinical Trial To Assess The Safety And Effectiveness Of A Novel Dual-Action Oral Topical Formulation Against Upper Respiratory Infections, Pranab K. Mukherjee, Frank Esper, Ken Buchheit, Karen Arters, Ina Adkins, Mahmoud A. Ghannoum, Robert A. Salata
Randomized, Double-Blind, Placebo-Controlled Clinical Trial To Assess The Safety And Effectiveness Of A Novel Dual-Action Oral Topical Formulation Against Upper Respiratory Infections, Pranab K. Mukherjee, Frank Esper, Ken Buchheit, Karen Arters, Ina Adkins, Mahmoud A. Ghannoum, Robert A. Salata
Faculty Scholarship
BACKGROUND: Current prevention options for upper respiratory infections (URIs) are not optimal. We conducted a randomized, double-blinded, placebo-controlled pilot clinical trial to evaluate the safety and efficacy of ARMS-Iâ„¢ (currently marketed as Halo™) in the prevention of URIs. METHODS: ARMS-I is patented novel formulation for the prevention and treatment of influenza, comprising a broad-spectrum antimicrobial agent (cetylpyridinium chloride, CPC) and components (glycerin and xanthan gum) that form a barrier on the host mucosa, thus preventing viral contact and invasion. Healthy adults (18—45 years of age) were randomized into ARMS-I or placebo group (50 subjects each). The drug was sprayed intra-orally …
Human Coronaviruses Are Uncommon In Patients With Gastrointestinal Illness, Frank Esper, Zhen Ou, Yung T. Huang
Human Coronaviruses Are Uncommon In Patients With Gastrointestinal Illness, Frank Esper, Zhen Ou, Yung T. Huang
Faculty Scholarship
BACKGROUND: Coronaviruses infect numerous animal species causing a variety of illnesses including respiratory, neurologic and enteric disease. Human coronaviruses (HCoV) are mainly associated with respiratory tract disease but have been implicated in enteric disease. OBJECTIVES: To investigate the frequency of coronaviruses in stool samples from children and adults with gastrointestinal illness by RT-PCR. STUDY DESIGN: Clinical samples submitted for infectious diarrhea testing were collected from December 2007 through March 2008. RNA extraction and RT-PCR was performed for stools negative for Clostridium difficile using primer sets against HCoV-229E, HCoV-OC43, HCoV-NL63, and HCoV-HKU1. Clinical data from samples positive for coronaviruses were reviewed …
Identification Of Critical Determinants On Ace2 For Sars-Cov Entry And Development Of A Potent Entry Inhibitor, Dong P. Han, Adam Penn-Nicholson, Michael W. Cho
Identification Of Critical Determinants On Ace2 For Sars-Cov Entry And Development Of A Potent Entry Inhibitor, Dong P. Han, Adam Penn-Nicholson, Michael W. Cho
Faculty Scholarship
Severe acute respiratory syndrome (SARS) is caused by a novel coronavirus, SARS-CoV. Virus entry into cells is mediated through interactions between spike (S) glycoprotein and angiotensin-converting enzyme 2 (ACE2). Alanine scanning mutagenesis analysis was performed to identify determinants on ACE2 critical for SARS-CoV infection. Results indicated that charged amino acids between residues 22 and 57 were important, K26 and D30, in particular. Peptides representing various regions of ACE2 critical for virus infection were chemically synthesized and evaluated for antiviral activity. Two peptides (a.a. 22–44 and 22–57) exhibited a modest antiviral activity with IC(50) of about 50 μM and 6 μM, …
Development Of A Safe Neutralization Assay For Sars-Cov And Characterization Of S-Glycoprotein, Dong P. Han, Hyung G. Kim, Young B. Kim, Michael W. Cho
Development Of A Safe Neutralization Assay For Sars-Cov And Characterization Of S-Glycoprotein, Dong P. Han, Hyung G. Kim, Young B. Kim, Michael W. Cho
Faculty Scholarship
The etiological agent of severe acute respiratory syndrome (SARS) has been identified as a novel coronavirus SARS-CoV. Similar to other coronaviruses, spike (S)-glycoprotein of the virus interacts with a cellular receptor and mediates membrane fusion to allow viral entry into susceptible target cells. Accordingly, S-protein plays an important role in virus infection cycle and is the primary target of neutralizing antibodies. To begin to understand its biochemical and immunological properties, we expressed both full-length and ectodomain of the protein in various primate cells. Our results show that the protein has an electrophoretic mobility of about 160–170 kDa. The protein is …