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influenza A

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https://www.readbyqxmd.com/read/29792863/identification-of-immunodominant-cd8-epitope-in-the-stalk-domain-of-influenza-b-viral-hemagglutinin
#1
Abenaya Muralidharan, Caroline Gravel, Amparo Duran, Louise Larocque, Changgui Li, Adrian Zetner, Gary Van Domselaar, Lisheng Wang, Xuguang Li
Human infections by type B influenza virus constitute about 25% of all influenza cases. The viral hemagglutinin is comprised of two subunits, HA1 and HA2. While HA1 is constantly evolving in an unpredictable fashion, the HA2 subunit is highly conserved, making it a potential candidate for a universal vaccine. However, immunodominant epitopes in the HA2 subunit remain largely unknown. To delineate MHC Class I epitopes, we first identified 9-mer H-2Kd -restricted CD8 T cell epitopes in the HA2 domain by in silico analyses, followed by evaluating the immunodominance of these peptides in mice challenged with the virus...
May 21, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29792154/exploration-of-hetero-aryl-derived-thienylchalcones-for-antiviral-and-anticancer-activities
#2
Vikrant Patil, Siddappa A Patil, Renukadevi Patil, Alejandro Bugarin, Kenneth Beaman, Shivaputra A Patil
BACKGROUND: Search for new antiviral and anticancer agents are essential because of the emergence of drug resistance in recent years. In continuation of our efforts in identifying the new small molecule antiviral and anticancer agents, we identified chalcones as potent antiviral and anticancer agents. OBJECTIVE: With the aim of identifying the broad acting antiviral and anticancer agents, we discovered substituted aryl/heteroaryl derived thienyl chalcones as antiviral and anticancer agents...
May 23, 2018: Medicinal Chemistry
https://www.readbyqxmd.com/read/29792118/extracorporeal-membrane-oxygenation-support-in-individuals-with-thoracic-insufficiency
#3
Shelley Hancock, Curtis Froehlich, Veronica Armijo-Garcia, Andrew D Meyer
INTRODUCTION: Respiratory failure is the leading cause of mortality in individuals with congenital spine and rib deformities. We present a case report of a child with Jeune syndrome surviving respiratory failure using extracorporeal membrane oxygenation (ECMO). We also summarize thoracic insufficiency syndrome cases reported in the Extracorporeal Life Support Organization (ELSO) registry. CASE REPORT: A two-year-old male with a chest circumference less than a third percentile for age was admitted with influenza pneumonia developing a peak oxygenation index of 103...
May 1, 2018: Perfusion
https://www.readbyqxmd.com/read/29790925/effectiveness-of-13-valent-pneumococcal-conjugate-vaccine-against-hospitalization-for-community-acquired-pneumonia-in-older-us-adults-a-test-negative-design
#4
John M McLaughlin, Qin Jiang, Raul E Isturiz, Heather L Sings, David L Swerdlow, Bradford D Gessner, Ruth M Carrico, Paula Peyrani, Timothy L Wiemken, William A Mattingly, Julio A Ramirez, Luis Jodar
Background: Following universal recommendation for use of 13-valent pneumococcal conjugate vaccine (PCV13) in US adults aged ≥65 years in September 2014, we conducted the first real-world evaluation of PCV13 vaccine effectiveness (VE) against hospitalized vaccine-type community-acquired pneumonia (CAP) in this population. Methods: Using a test-negative design, we identified cases and controls from a population-based surveillance study of adults in Louisville, Kentucky, who were hospitalized with CAP...
May 21, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29790657/from-low-to-high-pathogenicity-characterization-of-h7n7-avian-influenza-viruses-in-two-epidemiologically-linked-outbreaks
#5
Klaas Dietze, Annika Graaf, Timo Homeier-Bachmann, Christian Grund, Leonie Forth, Anne Pohlmann, Christa Jeske, Mattis Wintermann, Martin Beer, Franz J Conraths, Timm Harder
The ability of low pathogenic (LP) avian influenza viruses (AIV) of the subtypes H5 and H7 to mutate spontaneously to highly pathogenic (HP) variants is the main reason for their stringent control. On-the-spot evidence from the field of mutations in LPAIV to render the virus into nascent HP variants is scarce. Epidemiological investigations and molecular characterization of two spatiotemporally linked outbreaks caused by LP, and subsequently, HPAIV H7N7 in two-layer farms in Germany yielded such evidence. The outbreaks occurred within 45 days on farms 400 m apart...
May 23, 2018: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/29789823/influenza-a-m2-transmembrane-domain-tunes-its-conformational-heterogeneity-and-structural-plasticity-in-the-lipid-bilayer-by-forming-loop-structures
#6
Yue Liu, Junjun Tan, Jiahui Zhang, Chuanzhao Li, Yi Luo, Shuji Ye
We discovered for the first time that the influenza A virus M2TM tunes its conformational heterogeneity and structural plasticity to respond to environmental cues by undergoing a helix-to-loop transition, resolving controversies regarding the mechanism of proton conduction and plasticity of the M2TM in lipid bilayers.
May 23, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29789506/design-and-efficacy-of-nanogels-formulations-for-intranasal-administration
#7
REVIEW
Blessing A Aderibigbe, Tobeka Naki
Nanogels are drug delivery systems that can bypass the blood-brain barrier and deliver drugs to the desired site when administered intranasally. They have been used as a drug delivery platform for the management of brain diseases such as Alzheimer disease, migraine, schizophrenia and depression. nanogels have also been developed as vaccine carriers for the protection of bacterial infections such as influenza, meningitis, pneumonia and as veterinary vaccine carriers for the protection of animals from encephalomyelitis and mouth to foot disease...
May 23, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29789242/-what-have-you-heard-about-the-herd-does-education-about-local-influenza-vaccination-coverage-and-herd-immunity-affect-willingness-to-vaccinate
#8
Jacqueline Logan, Dawn Nederhoff, Brandon Koch, Bridget Griffith, Julian Wolfson, Fareed A Awan, Nicole E Basta
BACKGROUND: Vaccination protects individuals directly and communities indirectly by reducing transmission. We aimed to determine whether information about herd immunity and local vaccination coverage could change an individual's vaccination plans and concern about influenza. METHODS: We surveyed Minnesota residents ≥18 years during the 2016 Minnesota State Fair. Participants were asked to identify the definition of herd immunity, to report their history of and plans to receive influenza vaccine, to report their concern about influenza, and to estimate the reported influenza vaccination coverage in their county...
May 19, 2018: Vaccine
https://www.readbyqxmd.com/read/29789196/understanding-and-manipulating-viral-immunity-antibody-immunodominance-enters-center-stage
#9
REVIEW
Davide Angeletti, Jonathan W Yewdell
Adaptive immune responses against antigenically variable viruses and cellular pathogens are efficient in many cases, but largely limited to the infecting or immunizing strain. A major factor that limits immunity is immunodominance (ID), the hierarchical focusing of adaptive immune responses on a subset of antigenic determinants. While CD8+ T cell ID has been extensively studied, studies of basic mechanisms of B cell ID are limited, despite the importance of antibodies (Abs) for durable protection against pathogens...
May 19, 2018: Trends in Immunology
https://www.readbyqxmd.com/read/29789020/influenza-vaccination-of-cancer-patients-during-pd-1-blockade-induces-serological-protection-but-may-raise-the-risk-for-immune-related-adverse-events
#10
Heinz Läubli, Catharina Balmelli, Lukas Kaufmann, Michal Stanczak, Mohammedyaseen Syedbasha, Dominik Vogt, Astrid Hertig, Beat Müller, Oliver Gautschi, Frank Stenner, Alfred Zippelius, Adrian Egli, Sacha I Rothschild
BACKGROUND: Immune checkpoint inhibiting antibodies were introduced into routine clinical practice for cancer patients. Checkpoint blockade has led to durable remissions in some patients, but may also induce immune-related adverse events (irAEs). Lung cancer patients show an increased risk for complications, when infected with influenza viruses. Therefore, vaccination is recommended. However, the efficacy and safety of influenza vaccination during checkpoint blockade and its influence on irAEs is unclear...
May 22, 2018: Journal for Immunotherapy of Cancer
https://www.readbyqxmd.com/read/29788895/synthesis-of-nucleosides-and-non-nucleosides-based-4-6-disubstituted-2-oxo-dihydropyridine-3-carbonitriles-as-antiviral-agents
#11
Tarek S Ibrahim, Hassan A El-Sayed, Maan T Khayat, Amany M M Al-Mahmoudy, Ahmed H Moustafa, Ayat K Saad El-Deen, Sherif A F Rostom, Siva S Panda
BACKGROUND: Viral diseases are considered main threats that face the humanity worldwide. The emergence of new viruses like influenza viruses emphasizes the significance of designing novel antiviral drugs. METHOD: The aim of this work is to synthesize a new set of nucleoside and non-nucleoside cyanopyridine, characterized and evaluated for their in vitro antiviral properties against various strains. CONCLUSION: More than compounds showed variable antiviral potential against a panel of eighteen DNA and RNA viruses...
May 22, 2018: Medicinal Chemistry
https://www.readbyqxmd.com/read/29788836/intracranial-hemorrhage-in-adults-on-ecmo
#12
Yiorgos Alexandros Cavayas, Lorenzo Del Sorbo, Eddy Fan
RATIONALE: Extracorporeal membrane oxygenation (ECMO) use has exploded over the last decade. However, it remains invasive and associated with significant complications, including tamponade, infection, thrombosis, gas embolism and bleeding. The most dreaded complication is intracranial hemorrhage (ICH). In this article, we review the literature on the incidence, diagnosis, risk factors, pathophysiology, prognosis, prevention and management of ICH in adults on ECMO. MAIN FINDINGS: We found a high incidence of ICH in the literature with a poor prognosis...
May 2018: Perfusion
https://www.readbyqxmd.com/read/29788443/pediatric-infectious-diseases-meets-the-future
#13
Janet R Gilsdorf, Paul Spearman, Janet A Englund, Tina Q Tan, Kristina A Bryant
Pediatric infectious diseases physicians are dedicated to the diagnosis, prevention, and management of infections in children. As such, we play large, and important, roles in the clinical care of children from birth to late adolescence and in infection prevention, antimicrobial stewardship, research pertaining to infections, public health, international and global health, and advocacy for children's health. Furthermore, we are critical to the education of future physicians (in general), pediatricians, and infectious diseases doctors...
May 19, 2018: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/29787986/anti-inflammatory-effects-and-mechanism-of-the-total-flavonoids-from-artemisia-scoparia-waldst-et-kit-in-vitro-and-in-vivo
#14
Xue Wang, Hua Huang, Xueping Ma, Linlin Wang, Chong Liu, Biyu Hou, Shengqian Yang, Li Zhang, Guanhua Du
Artemisia scoparia Waldst. et Kit. is traditionally used for the treatment of jaundice urinary retention, itching wet sores, infectious icteric hepatitis and influenza in Uighur medicine. This study aimed to further illuminate the anti-inflammatory effects and mechanism of the total flavonoids (ASTF) from Artemisia scoparia Waldst. et Kit. In vitro, RAW 264.7 cells were pretreated with ASTF 1 h before stimulation with LPS (1 μg/mL) for 24 h. Then, the concentrations of NO, PGE2 , TNF-α, IL-6 and MCP-1 in the medium were determined...
May 19, 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29787323/the-role-of-vaccines-in-fighting-antimicrobial-resistance-amr
#15
Kathrin U Jansen, Annaliesa S Anderson
The problem of antimicrobial resistance (AMR) and the associated morbidity and mortality due to antibiotic resistant bacterial pathogens is not new. However, AMR has been increasing at an alarming rate with appearances of diseases caused by bacteria exhibiting resistance to not just one but multiple classes of antibiotics. The World Health Organization (WHO) supported by governments, health ministries and health agencies has formulated global action plans to combat the rise in AMR, supporting a number of proven initiatives such as antimicrobial stewardship, investments in development of new classes of antibiotics, and educational programs designed to eliminate inappropriate antibiotic use...
May 22, 2018: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29786025/resident-perspectives-on-communication-training-that-utilizes-immersive-virtual-reality
#16
Francis J Real, Dominick DeBlasio, Nicholas J Ollberding, David Davis, Bradley Cruse, Daniel Mclinden, Melissa D Klein
Background: Communication skills can be difficult to teach and assess in busy outpatient settings. These skills are important for effective counseling such as in cases of influenza vaccine hesitancy. It is critical to consider novel educational methods to supplement current strategies aimed at teaching relational skills. Methods: An immersive virtual reality (VR) curriculum on addressing influenza vaccine hesitancy was developed using Kern's six-step approach to curriculum design...
September 2017: Education for Health: Change in Training & Practice
https://www.readbyqxmd.com/read/29785478/changing-trend-of-infectious-diseases-in-nepal
#17
Shiba Kumar Rai
Many infectious/communicable diseases (IDs) are endemic in Nepal. Until a decade and half ago, IDs were the major cause of both morbidity and mortality accounting 70% for both. However, as a result of various preventive measures implemented by both the state and non-state actors, the overall IDs have shown a changing (declining) trend. The most impressive decline has been seen in the intestinal helminth infection. Though the overall burden of IDs is decreasing, several newer infectious diseases (emerging infections) namely, dengue fever, scrub typhus, influenza (H5N1 and H1N1), and others are posing a great public health problem...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29785460/rapid-measurement-of-long-range-distances-in-proteins-by-multidimensional-13-c-19-f-redor-nmr-under-fast-magic-angle-spinning
#18
Alexander A Shcherbakov, Mei Hong
The ability to simultaneously measure many long-range distances is critical to efficient and accurate determination of protein structures by solid-state NMR (SSNMR). So far, the most common distance constraints for proteins are 13 C-15 N distances, which are usually measured using the rotational-echo double-resonance (REDOR) technique. However, these measurements are restricted to distances of up to ~ 5 Å due to the low gyromagnetic ratios of 15 N and 13 C. Here we present a robust 2D 13 C-19 F REDOR experiment to measure multiple distances to ~ 10 Å...
May 21, 2018: Journal of Biomolecular NMR
https://www.readbyqxmd.com/read/29784985/chronic-rhinosinusitis-with-nasal-polyps-is-characterized-by-dysbacteriosis-of-the-nasal-microbiota
#19
Thanit Chalermwatanachai, Ramiro Vilchez-Vargas, Gabriele Holtappels, Tim Lacoere, Ruy Jáuregui, Frederiek-Maarten Kerckhof, Dietmar H Pieper, Tom Van de Wiele, Mario Vaneechoutte, Thibaut Van Zele, Claus Bachert
Chronic rhinosinusitis with nasal polyp (CRSwNP) patients are often characterized by asthma comorbidity and a type-2 inflammation of the sinonasal mucosa. The mucosal microbiota has been suggested to be implicated in the persistence of inflammation, but associations have not been well defined. To compare the bacterial communities of healthy subjects with CRSwNP patients, we collected nasal swabs from 17 healthy subjects, 21 CRSwNP patients without asthma (CRSwNP-A), and 20 CRSwNP patients with co-morbid asthma (CRSwNP+A)...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29784853/carbapenem-non-susceptible-haemophilus-influenzae-with-penicillin-binding-protein-3-containing-amino-acid-insertion
#20
Kazuki Kitaoka, Kouji Kimura, Hiromitsu Kitanaka, Hirotsugu Banno, Wanchun Jin, Jun-Ichi Wachino, Yoshichika Arakawa
Prevalence of β-lactamase-negative ampicillin-resistant Haemophilus influenzae (BLNAR) has become a clinical concern. In BLNAR, amino acid substitutions in penicillin-binding protein 3 (PBP3) are relevant to the β-lactam resistance. Carbapenem-non-susceptible H. influenzae isolates have been rarely reported. Through antimicrobial susceptibility testing and nucleotide sequence analysis of ftsI , encoding PBP3, and utilizing a collection of H. influenzae clinical isolates in our laboratory, we obtained a carbapenem-non-susceptible clinical isolate (NUBL1772) that possessed an altered PBP3 containing V525_N526insM...
May 21, 2018: Antimicrobial Agents and Chemotherapy
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