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https://www.readbyqxmd.com/read/28440692/both-hepatitis-c-virus-specific-t-cell-responses-and-il28b-rs12979860-single-nucleotide-polymorphism-genotype-influence-antihepatitis-c-virus-treatment-outcome-in-patients-with-chronic-hepatitis-c
#1
José M Benito, Javier García-Samaniego, Marcial García, Antonio Madejón, Luz Martín-Carbonero, Alfonso Cabello, Beatriz Álvarez, Miguel Górgolas, Norma Rallón
Despite new treatments for hepatitis C virus (HCV) infection, IFNα-based regimens still have clinical relevance in special populations of patients and remain the only therapeutic option for many patients. We sought to elucidate the interplay between two relevant factors (IL28B polymorphism and T cell immune responses) involved in the outcome of this therapy in HCV-infected patients. We evaluated 38 patients infected with HCV genotype 1-17 coinfected with HIV-who were undergoing a full course of pegIFNα/RBV therapy...
April 25, 2017: Journal of Interferon & Cytokine Research
https://www.readbyqxmd.com/read/28439780/angelica-keiskei-an-emerging-medicinal-herb-with-various-bioactive-constituents-and-biological-activities
#2
REVIEW
Yun-Seo Kil, Sally T Pham, Eun Kyoung Seo, Mahtab Jafari
Angelica keiskei (Miq.) Koidz. (Umbelliferae) has traditionally been used to treat dysuria, dyschezia, and dysgalactia as well as to restore vitality. Recently, the aerial parts of A. keiskei have been consumed as a health food. Various flavonoids, coumarins, phenolics, acetylenes, sesquiterpene, diterpene, and triterpenes were identified as the constituents of A. keiskei. The crude extracts and pure constituents were proven to inhibit tumor growth and ameliorate inflammation, obesity, diabetics, hypertension, and ulcer...
April 24, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/28438630/identification-of-anti-viral-activity-of-the-cardenolides-na-k-atpase-inhibitors-against-porcine-transmissible-gastroenteritis-virus
#3
Cheng-Wei Yang, Hsin-Yu Chang, Hsing-Yu Hsu, Yue-Zhi Lee, Hsun-Shuo Chang, Ih-Sheng Chen, Shiow-Ju Lee
A series of naturally occurring cardenolides that exhibit potent anti-transmissible gastroenteritis virus (TGEV) activity in swine testicular (ST) cells has been identified. In an immunofluorescence assay, these cardenolides were found to diminish the expressions of TGEV nucleocapsid and spike protein, which was used as an indication for viral replication; block TGEV infection induced apoptosis and cytopathic effects; and impart the same trend of inhibitory activity against Na(+)/K(+)-ATPase as for anti-TGEV activity...
April 21, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28438378/genotyping-of-the-human-papilloma-virus-in-a-group-of-mexican-women-treated-in-a-highly-specialist-hospital-multiple-infections-and-their-potential-transcendence-in-the-current-vaccination-programme
#4
Pablo Romero-Morelos, Arizbett Uribe-Jiménez, Cindy Bandala, Albros Poot-Vélez, Nora Ornelas-Corral, Miriam Rodríguez-Esquivel, Mariana Valdespino-Zavala, Keiko Taniguchi, Daniel Marrero-Rodríguez, Ricardo López-Romero, Mauricio Salcedo
BACKGROUND AND OBJETIVE: Human papilloma virus (HPV) is one of the main risk factors associated with the development of cervical cancer and its precursor lesions. It has been reported that HPV16 and 18 types cover approximately 70% of cervical cancer worldwide; however, significant variation in percentages of HPV infections could be related to specific populations. MATERIALS AND METHODS: Purified DNA of 67 cervical samples were analyzed by Linear Array® HPV genotyping kit...
April 21, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28438134/poly-i-c-induces-collective-migration-of-hacat-keratinocytes-via-il-8
#5
Kazuhide Takada, Shihoko Komine-Aizawa, Naoko Hirohata, Quang Duy Trinh, Atsuyoshi Nishina, Hirokazu Kimura, Satoshi Hayakawa
BACKGROUND: Delayed wound healing reduces the quality of life (QOL) of patients. Thus, understanding the mechanism of wound healing is indispensable for better management. However, the role of innate immunity in wound healing is thus far unknown. Recently the involvement of TLR3 in wound healing has been evaluated. The systemic administration of polyriboinosinic-polyribocytidylic acid (poly I:C ; a substitute for viral dsRNA and a ligand of toll-like receptor 3), enhances wound healing in vivo...
April 24, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28437766/cyanobacterial-lectins-characteristics-and-their-role-as-antiviral-agents
#6
REVIEW
Ram Sarup Singh, Amandeep Kaur Walia, Jasvirinder Singh Khattar, Davinder Pal Singh, John F Kennedy
Lectins are ubiquitous proteins/glycoproteins of non-immune origin that bind reversibly to carbohydrates in non-covalent and highly specific manner. These lectin-glycan interactions could be exploited for establishment of novel therapeutics, targeting the adherence stage of viruses and thus helpful in eliminating wide spread viral infections. Here the review focuses on the haemagglutination activity, carbohydrate specificity and characteristics of cyanobacterial lectins. Cyanobacterial lectins exhibiting high specificity towards mannose or complex glycans have potential role as anti-viral agents...
April 21, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28437539/safety-and-efficacy-of-antiviral-therapy-for-prevention-of-cytomegalovirus-reactivation-in-immunocompetent-critically-ill-patients-a-randomized-clinical-trial
#7
Nicholas J Cowley, Andrew Owen, Sarah C Shiels, Joanne Millar, Rebecca Woolley, Natalie Ives, Husam Osman, Paul Moss, Julian F Bion
Importance: Latent cytomegalovirus (CMV) infection is present in more than half the adult population, and a viral reactivation (ie, when the virus becomes measurable in body fluids such as blood) can occur in up to one-third of these individuals during episodes of critical illness. Objective: To determine whether antiviral therapy is safe and effective for preventing CMV reactivation in a general population of critically ill patients. Design, Setting, and Participants: A single-center, open-label, randomized, controlled clinical trial recruited 124 CMV-seropositive patients undergoing mechanical ventilation for at least 24 hours in the intensive care unit between January 1, 2012, and January 31, 2014...
April 24, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/28436337/molecular-cloning-expression-and-characterization-of-e2f-transcription-factor-4-from-antheraea-pernyi
#8
M N Abbas, S Kausar, Y-X Sun, Y Sun, L Wang, C Qian, G-Q Wei, B-J Zhu, C-L Liu
The E2F transcription factor family is distributed widely in eukaryotes and has been well studied among mammals. In the present study, the E2F transcription factor 4 (E2F4) gene was isolated from fat bodies of Antheraea pernyi and sequenced. E2F4 comprised a 795 bp open reading frame encoding a deduced amino acid sequence of 264 amino acid residues. The recombinant protein was expressed in Escherichia coli (Transetta DE3), and anti-E2F4 antibodies were prepared. The deduced amino acid sequence displayed significant homology to an E2F4-like protein from Bombyx mori L...
April 24, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28435998/a-6-year-old-boy-with-wilson-disease-a-diagnostic-dilemma
#9
Ramaswamy Ganesh, N Suresh, T Vasanthi, Malathi Sathiyasekaran, R Thulasiraman
A 6-year-old boy presented with 2 months history of progressive abdominal distension and jaundice. He was deeply icteric with ascites, hepatosplenomegaly, hyperbilirubinemia, raised transaminases, and coagulopathy. Viral markers and slit lamp examination for Kayser-Fleischer ring were negative. Serum ceruloplasmin and 24-h urinary copper post-D-pencillamine challenge were normal. Anti-smooth muscle antibody was positive 1:20, and liver biopsy showed micronodular cirrhosis with abundant Mallory hyaline and stainable copper deposits...
April 24, 2017: Indian Journal of Gastroenterology: Official Journal of the Indian Society of Gastroenterology
https://www.readbyqxmd.com/read/28435692/a-cd3-cd28-microbead-based-hiv-1-viral-outgrowth-assay
#10
EDITORIAL
Yury V Kuzmichev, Rebecca T Veenhuis, Christopher W Pohlmeyer, Caroline C Garliss, Victoria Ek Walker-Sperling, Joel N Blankson
AIMS: Latently infected resting CD4 T cells represent a major barrier to HIV-1 eradication efforts. The standard assays used for measuring this reservoir induce activation of resting CD4 T cells with either phytohaemagglutinin (PHA) with irradiated feeder cells, or with anti-CD3 antibodies. We designed a study to compare the sensitivity of a new assay (based on the stimulation of CD4 T cells with anti-CD3 and anti-CD28 coated microbeads) with that of the traditional PHA- and feeder-based viral outgrowth assay...
April 1, 2017: Journal of Virus Eradication
https://www.readbyqxmd.com/read/28434916/the-tetrameric-plant-lectin-banlec-neutralizes-hiv-through-bidentate-binding-to-specific-viral-glycans
#11
Jonathan T S Hopper, Stephen Ambrose, Oliver C Grant, Stefanie A Krumm, Timothy M Allison, Matteo T Degiacomi, Mark D Tully, Laura K Pritchard, Gabriel Ozorowski, Andrew B Ward, Max Crispin, Katie J Doores, Robert J Woods, Justin L P Benesch, Carol V Robinson, Weston B Struwe
Select lectins have powerful anti-viral properties that effectively neutralize HIV-1 by targeting the dense glycan shield on the virus. Here, we reveal the mechanism by which one of the most potent lectins, BanLec, achieves its inhibition. We identify that BanLec recognizes a subset of high-mannose glycans via bidentate interactions spanning the two binding sites present on each BanLec monomer that were previously considered separate carbohydrate recognition domains. We show that both sites are required for high-affinity glycan binding and virus neutralization...
April 17, 2017: Structure
https://www.readbyqxmd.com/read/28434689/early-childhood-transmission-of-hepatitis-b-prior-to-the-first-hepatitis-b-vaccine-dose-is-rare-among-babies-born-to-hiv-infected-and-non-hiv-infected-mothers-in-gulu-uganda
#12
E Seremba, J P Van Geertruyden, R Ssenyonga, C K Opio, J M Kaducu, J B Sempa, R Colebunders, P Ocama
BACKGROUND: Hepatitis B (HBV) in sub-Saharan Africa is believed to be horizontally acquired. However, because of the high HBV prevalence in northern Uganda, no hepatitis B vaccination at birth and no access to HBV immunoglobulin, we hypothesize that vertical transmission also could also play an important role. We therefore investigated the incidence of HBV among babies presenting for their first HBV vaccine dose in Gulu, Uganda. METHODS: We recruited mothers and their babies (at least 6-week old) presenting for their postnatal care and first HBV vaccine dose respectively...
April 20, 2017: Vaccine
https://www.readbyqxmd.com/read/28434406/efavirenz-based-simplification-after-successful-early-lopinavir-boosted-ritonavir-based-therapy-in-hiv-infected-children-in-burkina-faso-and-c%C3%A3-te-d-ivoire-the-monod-anrs-12206-non-inferiority-randomised-trial
#13
Désiré Lucien Dahourou, Madeleine Amorissani-Folquet, Karen Malateste, Clarisse Amani-Bosse, Malik Coulibaly, Carole Seguin-Devaux, Thomas Toni, Rasmata Ouédraogo, Stéphane Blanche, Caroline Yonaba, François Eboua, Philippe Lepage, Divine Avit, Sylvie Ouédraogo, Philippe Van de Perre, Sylvie N'Gbeche, Angèle Kalmogho, Roger Salamon, Nicolas Meda, Marguerite Timité-Konan, Valériane Leroy
BACKGROUND: The 2016 World Health Organization guidelines recommend all children <3 years start antiretroviral therapy (ART) on protease inhibitor-based regimens. But lopinavir/ritonavir (LPV/r) syrup has many challenges in low-income countries, including limited availability, requires refrigeration, interactions with anti-tuberculous drugs, twice-daily dosing, poor palatability in young children, and higher cost than non-nucleoside reverse transcriptase inhibitor (NNRTI) drugs. Successfully initiating LPV/r-based ART in HIV-infected children aged <2 years raises operational challenges that could be simplified by switching to a protease inhibitor-sparing therapy based on efavirenz (EFV), although, to date, EFV is not recommended in children <3 years...
April 24, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28434229/the-cell-cycle-dependent-kinase-cdk9-is-a-post-exposure-drug-target-against-human-adenoviruses
#14
Vibhu Prasad, Maarit Suomalainen, Silvio Hemmi, Urs F Greber
Human adenoviruses (HAdVs) infect respiratory, gastrointestinal and urinary tracts, and give rise to eye infections and epidemic keratoconjunctivitis (EKC). They persist in lymphoid tissue, and cause morbidity and mortality in immunocompromised people. Treatments with significant post-exposure efficacy are not available. Here, we report that inhibition of the cell cycle-dependent kinase 9 (Cdk9) by RNA-interference, or the compound Flavopiridol blocked infections with HAdV-C2/5, EKC-causing HAdV-D8/37, and progeny formation in human corneal epithelial and cancer cells...
April 24, 2017: ACS Infectious Diseases
https://www.readbyqxmd.com/read/28432714/high-human-cytomegalovirus-dnaemia-early-post-transplantation-associates-with-irreversible-and-progressive-loss-of-renal-function
#15
Wouter T Lollinga, Lilli Rurenga-Gard, Willem van Doesum, Rik van Bergen, Arjan Diepstra, Judith M Vonk, Annelies Riezebos-Brilman, Hgm Niesters, Willem J van Son, Jacob van den Born, Jan-Stephan Sanders
BACKGROUND: Transplant recipients are prone to viral infections, which could affect renal transplantation outcome. Our aim was to assess the effects of early human cytomegalovirus (CMV) DNAemia on transplant renal function. METHODS: 264 (age 50.9±13.5; male 55%) Renal transplantation recipients undergoing preemptive anti-CMV therapy were retrospectively categorized based on early (<3 months post-Tx) CMV peak viral load (PVL); PVL≤536, PVL536-6310 or PVL>6310 International Units/ml (IU/ml)...
April 22, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28432378/advances-in-anti-viral-immune-defence-revealing-the-importance-of-the-ifn-jak-stat-pathway
#16
REVIEW
Nicola Raftery, Nigel J Stevenson
Interferon-alpha (IFN-α) is a potent anti-viral cytokine, critical to the host immune response against viruses. IFN-α is first produced upon viral detection by pathogen recognition receptors. Following its expression, IFN-α embarks upon a complex downstream signalling cascade called the JAK/STAT pathway. This signalling pathway results in the expression of hundreds of effector genes known as interferon stimulated genes (ISGs). These genes are the basis for an elaborate effector mechanism and ultimately, the clearance of viral infection...
April 21, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28432326/a-novel-mechanism-linking-memory-stem-cells-with-innate-immunity-in-protection-against-hiv-1-infection
#17
Yufei Wang, Trevor Whittall, Stuart Neil, Gary Britton, Mukesh Mistry, Supachai Rerks-Ngarm, Punnee Pitisuttithum, Jaranit Kaewkungwal, Sorachai Nitayaphan, Xuesong Yu, Alicia Sato, Robert J O'Connell, Nelson L Michael, Merlin L Robb, Jerome H Kim, Thomas Lehner
HIV infection affects 37 million people and about 1.7 million are infected annually. Among the phase III clinical trials only the RV144 vaccine trial elicited significant protection against HIV-1 acquisition, but the efficacy and immune memory were inadequate. To boost these vaccine functions we studied T stem cell memory (TSCM) and innate immunity. TSCM cells were identified by phenotypic markers of CD4(+) T cells and they were further characterised into 4 subsets. These expressed the common IL-2/IL-15 receptors and another subset of APOBEC3G anti-viral restriction factors, both of which were upregulated...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28428619/transcriptomic-analysis-reveals-a-previously-unknown-role-for-cd8-t-cells-in-rvsv-ebov-mediated-protection
#18
Andrea R Menicucci, Suhas Sureshchandra, Andrea Marzi, Heinz Feldmann, Ilhem Messaoudi
Ebola virus (EBOV) poses a significant threat to human health as highlighted by the recent epidemic in West Africa. Data from animal studies and a ring vaccination clinical trial conducted in Guinea during the recent epidemic demonstrated that a recombinant VSV where G protein is replaced with EBOV GP (rVSV-EBOV) is safe and highly efficacious. We previously established that antibodies are essential for rVSV-EBOV mediated protection against EBOV; however, the mechanisms by which this vaccine induces a humoral response and the role of T-cells in rVSV-EBOV mediated protection remain poorly understood...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28428612/granzyme-k-deficient-mice-show-no-evidence-of-impaired-anti-viral-immunity
#19
Lars T Joeckel, Cody C Allison, Mark Pellegrini, Catherina H Bird, Phillip Ian Bird
The biological role of granzyme K, a serine protease of cytotoxic T lymphocytes (CTL), is controversial. It has been reported to induce perforin-mediated cell death in vitro, but is also reported to be non-cytotoxic and to operate in inflammatory processes. To elucidate the biological role of this protease we have deleted the granzyme K gene in mice (mutant allele: Gzmk(tm1.1Pib); MGI:5636646). Gzmk(-/-) mice are healthy, anatomically normal, fecund, and show normal hematopoietic development. Gzmk(-/-) mice readily recover from Lymphocytic choriomeningitis virus and mouse pox Ectromelia virus infection...
April 21, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28428548/antiviral-activities-of-schizonepeta-tenuifolia-briq-against-enterovirus-71-in-vitro-and-in-vivo
#20
Sin-Guang Chen, Mei-Ling Cheng, Kuan-Hsing Chen, Jim-Tong Horng, Ching-Chuan Liu, Shih-Min Wang, Hiroaki Sakurai, Yann-Lii Leu, Shulhn-Der Wang, Hung-Yao Ho
No effective drug is currently available for treatment of enterovirus 71 (EV71) infection. Schizonepeta tenuifolia Briq. (ST) has been used as a herbal constituent of traditional Chinese medicine. We studied whether the aqueous extract of Schizonepeta tenuifolia Briq (STE) has antiviral activity. STE inhibited replication of EV71, as evident by its ability to diminish plaque formation and cytopathic effect induced by EV71, and to inhibit the synthesis of viral RNA and protein. Moreover, daily single-dose STE treatment significantly improved the survival of EV71-infected mice, and ameliorated the symptoms...
April 20, 2017: Scientific Reports
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