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https://www.readbyqxmd.com/read/29785476/vaccinia-virus-protein-c6-a-multifunctional-interferon-antagonist
#1
Geoffrey L Smith
Vaccinia virus (VACV) is the prototypic member of the Orthopoxvirus genus of the Poxviridae. It is also the live vaccine that was used to eradicate smallpox. Like other poxviruses, VACV replicates in the cytoplasm and has a large double-stranded (ds)DNA genome and a complex virion. Approximately, half of the VACV genes are nonessential for virus replication in cell culture but encode a remarkable array of immunomodulators that antagonise the innate immune response to virus infection. This short review concerns one such protein, C6, that is a multifunctional inhibitor of interferon...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29785215/mycobacteriosis-and-tuberculosis-laboratory-diagnosis
#2
REVIEW
Davood Azadi, Tahereh Motallebirad, Kazem Ghaffari, Hasan Shojaei
Background: Tuberculosis is one of the most important infectious diseases that has claimed its victims throughout much of known human history. With Koch's discovery of the tubercle bacillus as the etiologic agent of the disease, his sanitary and hygienic measures, which were based on his discovery and the development of a vaccine against tuberculosis by Albert Calmette and Camille Guérin in 1921, an attenuated Mycobacterium bovis strain, bacilli Calmette-Guérin (BCG), and the discovery of the first antibiotic against tuberculosis, streptomycin by Selman Waksman in 1943, soon led to the opinion that appropriate control measures had become available for tuberculosis and it had been assumed that the disease could ultimately be eradicated...
2018: Open Microbiology Journal
https://www.readbyqxmd.com/read/29785023/hiv-vaccine-candidate-activation-of-hypoxia-and-the-inflammasome-in-cd14-monocytes-is-associated-with-a-decreased-risk-of-siv-mac251-acquisition
#3
Monica Vaccari, Slim Fourati, Shari N Gordon, Dallas R Brown, Massimilano Bissa, Luca Schifanella, Isabela Silva de Castro, Melvin N Doster, Veronica Galli, Maria Omsland, Dai Fujikawa, Giacomo Gorini, Namal P M Liyanage, Hung V Trinh, Katherine M McKinnon, Kathryn E Foulds, Brandon F Keele, Mario Roederer, Richard A Koup, Xiaoying Shen, Georgia D Tomaras, Marcus P Wong, Karissa J Munoz, Johannes S Gach, Donald N Forthal, David C Montefiori, David J Venzon, Barbara K Felber, Margherita Rosati, George N Pavlakis, Mangala Rao, Rafick-Pierre Sekaly, Genoveffa Franchini
Qualitative differences in the innate and adaptive responses elicited by different HIV vaccine candidates have not been thoroughly investigated. We tested the ability of the Aventis Pasteur live recombinant canarypox vector (ALVAC)-SIV, DNA-SIV and Ad26-SIV vaccine prime modalities together with two ALVAC-SIV + gp120 protein boosts to reduce the risk of SIVmac251 acquisition in rhesus macaques. We found that the DNA and ALVAC prime regimens were effective, but the Ad26 prime was not. The activation of hypoxia and the inflammasome in CD14+ CD16- monocytes, gut-homing CCR5-negative CD4+ T helper 2 (TH 2) cells and antibodies to variable region 2 correlated with a decreased risk of SIVmac251 acquisition...
May 21, 2018: Nature Medicine
https://www.readbyqxmd.com/read/29781414/prevalence-of-human-papillomavirus-types-associated-with-cervical-lesions-in-sergipe-state-northeastern-brazil-high-frequency-of-a-possibly-carcinogenic-type
#4
I G S S Serra, E D Araujo, G S Barros, F L S G Santos, R Q Gurgel, M V A Batista
Persistent infection with high-risk human papillomavirus (HPV) is the main cause of cervical cancer and the prevalence of HPV types varies depending on the geographic region. Therefore, this study assessed the prevalence of HPV types in women with cervical lesions from Sergipe state, Northeastern Brazil. A cross-sectional study was conducted in women with cervical lesions from March to December 2014. These lesions were investigated by PCR and HPV types were identified by DNA sequencing. 432 patients were included, of which 337 patients tested positive for HPV...
May 21, 2018: Epidemiology and Infection
https://www.readbyqxmd.com/read/29778513/the-immune-response-of-rhesus-macaques-to-novel-vaccines-comprising-hepatitis-b-virus-s-pres1-and-core-antigens
#5
Xia Chuai, Bangxiang Xie, Hong Chen, Xinyi Tan, Wen Wang, Baoying Huang, Yao Deng, Wenhui Li, Wenjie Tan
Therapeutic vaccines represent a unique approach to hepatitis B virus (HBV) treatment and have the potential to induce long-term control of infection. This study explored the immune responses of rhesus macaques to novel vaccines comprising the S, PreS1, and Core antigens of the HBV that showed promise as prophylactic and therapeutic approaches in a mouse model. The tested vaccines included two DNA vaccines (pVRC-SS1, pVRC-CS1), an HBV particle subunit (HBSS1) vaccine and the recombinant vaccinia virus- (RVJ-) based vaccines (RVJSS1 and RVJCS1) in which SS1 containing S (1-223 aa) and PreS1 (21-47 aa), CS1 containing Core (1-144 aa) and PreS1 (1-42 aa)...
May 16, 2018: Vaccine
https://www.readbyqxmd.com/read/29777766/immune-response-and-protective-effect-against-spring-viremia-of-carp-virus-induced-by-intramuscular-vaccination-with-a-swcnts-dna-vaccine-encoding-matrix-protein
#6
Chen Zhang, Zhao Zhao, Gao-Yang Liu, Jian Li, Gao-Xue Wang, Bin Zhu
To elicit the immune protective of vaccine against the highly contagious and pathogenic disease caused by spring viremia of carp virus (SVCV), a novel functionalized single-walled carbon nanotubes (SWCNTs) were applied as a delivery vehicle for DNA vaccine. In this study, we report a SWCNTs-DNA vaccine encoding matrix protein of SVCV which, when injected in the muscle at a dose of 10 μg SWCNTs-pcDNA-M vaccine, confers up to 51.3% protection against intraperitoneal challenge with SVCV. In addition, SWCNTs as a promising vehicle can enhance about 17...
May 16, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29774519/zika-virus-baculovirus-expressed-virus-like-particles-induce-neutralizing-antibodies-in-mice
#7
Shiyu Dai, Tao Zhang, Yanfang Zhang, Hualin Wang, Fei Deng
The newly emerged mosquito-borne Zika virus (ZIKV) strains pose a global challenge owing to its ability to cause microcephaly and neurological disorders. Several ZIKV vaccine candidates have been proposed, including inactivated and live attenuated virus vaccines, vector-based vaccines, DNA and RNA vaccines. These have been shown to be efficacious in preclinical studies in mice and nonhuman primates, but their use will potentially be a threat to immunocompromised individuals and pregnant women. Virus-like particles (VLPs) are empty particles composed merely of viral proteins, which can serve as a safe and valuable tool for clinical prevention and treatment strategies...
May 17, 2018: Virologica Sinica
https://www.readbyqxmd.com/read/29772028/randomized-phase-i-trial-hiv-core-003-depletion-of-serum-amyloid-p-component-and-immunogenicity-of-dna-vaccination-against-hiv-1
#8
Nicola J Borthwick, Thirusha Lane, Nathifa Moyo, Alison Crook, Jung Min Shim, Ian Baines, Edmund G Wee, Philip N Hawkins, Julian D Gillmore, Tomáš Hanke, Mark B Pepys
BACKGROUND: The failure of DNA vaccination in humans, in contrast to its efficacy in some species, is unexplained. Observational and interventional experimental evidence suggests that DNA immunogenicity may be prevented by binding of human serum amyloid P component (SAP). SAP is the single normal DNA binding protein in human plasma. The drug (R)-1-[6-[(R)-2-carboxypyrrolidin-1-yl]-6-oxo-hexanoyl]pyrrolidine-2-carboxylic acid (CPHPC, miridesap), developed for treatment of systemic amyloidosis and Alzheimer's disease, depletes circulating SAP by 95-99%...
2018: PloS One
https://www.readbyqxmd.com/read/29771873/community-based-services-to-improve-testing-and-linkage-to-care-among-non-u-s-born-persons-with-chronic-hepatitis-b-virus-infection-three-u-s-programs-october-2014-september-2017
#9
Aaron M Harris, Ruth Link-Gelles, Karen Kim, Edwin Chandrasekar, Su Wang, Nicole Bannister, Perry Pong, Eric Chak, Moon S Chen, Christopher Bowlus, Noele P Nelson
Among an estimated 850,000 to 2.2 million persons with chronic hepatitis B virus (HBV) infection in the United States, 70% are non-U.S.-born (1,2). All patients require linkage to care, and approximately 20%-40% require antiviral treatment (3). Without treatment, one in four persons chronically infected with HBV will die prematurely from liver failure, liver cirrhosis, or hepatocellular carcinoma (4). To mitigate morbidity and mortality, CDC funded a cooperative agreement to develop hepatitis B testing and linkage-to-care programs serving non-U...
May 18, 2018: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/29769207/mitigating-sox2-potentiated-immune-escape-of-head-and-neck-squamous-cell-carcinoma-with-a-sting-inducing-nanosatellite-vaccine
#10
Yee Sun Tan, Kanokwan Sansanaphongpricha, Yuying Xie, Christopher R Donnelly, Xiaobo Luo, Blake R Heath, Xinyi Zhao, Emily L Bellile, Hongxiang Hu, Hongwei Chen, Peter J Polverini, Qianming Chen, Simon Young, Thomas E Carey, Jacques E Nör, Robert L Ferris, Gregory Wolf, Duxin Sun, Yu L Lei
PURPOSE: The response rates of Head and Neck Squamous Cell Carcinoma (HNSCC) to checkpoint blockade are below 20%. We aim to develop a mechanism-based vaccine to prevent HNSCC immune escape. EXPERIMENTAL DESIGN: We performed RNA-Seq of sensitive and resistant HNSCC cells to discover central pathways promoting resistance to immune killing. Using biochemistry, animal models, HNSCC microarray and immune cell deconvolution, we assessed the role of SOX2 in inhibiting STING-type I interferon (IFN-I) signaling-mediated anti-tumor immunity...
May 16, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29769087/replacement-of-feline-foamy-virus-bet-by-feline-immunodeficiency-virus-vif-yields-replicative-virus-with-novel-vaccine-candidate-potential
#11
Carmen Ledesma-Feliciano, Sarah Hagen, Ryan Troyer, Xin Zheng, Esther Musselman, Dragana Slavkovic Lukic, Ann-Mareen Franke, Daniel Maeda, Jörg Zielonka, Carsten Münk, Guochao Wei, Sue VandeWoude, Martin Löchelt
BACKGROUND: Hosts are able to restrict viral replication to contain virus spread before adaptive immunity is fully initiated. Many viruses have acquired genes directly counteracting intrinsic restriction mechanisms. This phenomenon has led to a co-evolutionary signature for both the virus and host which often provides a barrier against interspecies transmission events. Through different mechanisms of action, but with similar consequences, spumaviral feline foamy virus (FFV) Bet and lentiviral feline immunodeficiency virus (FIV) Vif counteract feline APOBEC3 (feA3) restriction factors that lead to hypermutation and degradation of retroviral DNA genomes...
May 16, 2018: Retrovirology
https://www.readbyqxmd.com/read/29767739/efficacy-immunogenicity-and-safety-of-a-9-valent-human-papillomavirus-vaccine-subgroup-analysis-of-participants-from-asian-countries
#12
S M Garland, P Pitisuttithum, H Y S Ngan, C-H Cho, C-Y Lee, C-A Chen, Y C Yang, T-Y Chu, N-F Twu, R Samakoses, Y Takeuchi, T H Cheung, S C Kim, L-M Huang, B-G Kim, Y-T Kim, K-H Kim, Y-S Song, S Lalwani, J-H Kang, M Sakamoto, H-S Ryu, N Bhatla, H Yoshikawa, M C Ellison, S R Han, E Moeller, S Murata, M Ritter, M Sawata, C Shields, A Walia, G Perez, A Luxembourg
Background: A 9-valent human papillomavirus-6/11/16/18/31/33/45/52/58 (9vHPV) vaccine extends coverage to 5 next most common oncogenic types (31/33/45/52/58) in cervical cancer versus quadrivalent HPV (qHPV) vaccine. We describe efficacy, immunogenicity, and safety in Asian participants (India, Hong Kong, South Korea, Japan, Taiwan, and Thailand) from 2 international studies: a randomized, double-blinded, qHPV vaccine-controlled efficacy study (young women aged 16-26 years; NCT00543543; Study 001); and an immunogenicity study (girls and boys aged 9-15 years; NCT00943722; Study 002)...
May 15, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29764945/a-mechanism-of-unidirectional-transformation-leading-to-antibiotic-resistance-occurs-within-nasopharyngeal-pneumococcal-biofilm-consortia
#13
Santiago M Lattar, Xueqing Wu, Jennifer Brophy, Fuminori Sakai, Keith P Klugman, Jorge E Vidal
Streptococcus pneumoniae acquires genes for resistance to antibiotics such as streptomycin (Str) or trimethoprim (Tmp) by recombination via transformation of DNA released by other pneumococci and closely related species. Using naturally transformable pneumococci, including strain D39 serotype 2 (S2) and TIGR4 (S4), we studied whether pneumococcal nasopharyngeal transformation was symmetrical, asymmetrical, or unidirectional. Incubation of S2Tet and S4Str in a bioreactor simulating the human nasopharynx led to the generation of SpnTet/Str recombinants...
May 15, 2018: MBio
https://www.readbyqxmd.com/read/29764863/extracorporeal-photochemotherapy-drives-monocyte-to-dendritic-cell-maturation-to-induce-anti-cancer-immunity
#14
Alessandra Ventura, Aaron Vassall, Eve Robinson, Renata Filler, Douglas Hanlon, Katrina Meeth, Harib Ezaldein, Michael Girardi, Olga Sobolev, Marcus W Bosenberg, Richard L Edelson
Extracorporeal photochemotherapy (ECP) is a cancer immunotherapy for cutaneous T cell lymphoma (CTCL) operative in more than 350 centers worldwide. While its efficacy and favorable safety profile have driven its widespread use, elucidation of its underlying mechanism has been difficult. In this study, we identify the principal contributors to the anti-cancer immunotherapeutic effects of ECP, with the goal of enhancing potency and broadening applicability to additional malignancies. First, we scaled down the clinical ECP leukocyte-processing device to mouse size...
May 15, 2018: Cancer Research
https://www.readbyqxmd.com/read/29764836/subcellular-localization-of-antigen-dictates-delivery-of-cd4-t-cell-help-for-the-ctl-response-upon-therapeutic-dna-vaccination-into-the-skin
#15
Nikolina Bąbała, Astrid Bovens, Evert de Vries, Victoria Iglesias-Guimarais, Tomasz Ahrends, Matthew F Krummel, Jannie Borst, Adriaan D Bins
In a mouse model of therapeutic DNA vaccination, we studied how the subcellular localization of vaccine protein impacts antigen delivery to professional antigen presenting cells (pAPCs) and efficiency of CTL priming. Cytosolic, membrane-bound, nuclear, and secretory versions of ZsGreen fluorescent protein, conjugated to MHC class I and -II ovalbumin (OVA) epitopes were expressed in keratinocytes by DNA vaccination into the skin. ZsGreen-OVA versions reached B cells in the skin-draining lymph node (dLN) that proved irrelevant for CTL priming...
May 15, 2018: Cancer Immunology Research
https://www.readbyqxmd.com/read/29764681/plasmid-pcdna3-1-s11-constructed-based-on-the-s11-segment-of-grass-carp-reovirus-as-dna-vaccine-provides-immune-protection
#16
Yan Gao, Chao Pei, Xiaoying Sun, Chao Zhang, Li Li, Xianghui Kong
Although some commercial vaccines against grass carp reovirus (GCRV) are available, given the many varieties of GCRV and limited types of vaccines, the disease caused by GCRV remains a major problem, which leads to economic losses in grass carp aquaculture. A reovirus strain (GCRV-HN14) was recently isolated from local diseased fish in our laboratory. The S11 segment of GCRV-HN14 was speculated to encode the virus capsid protein VP35. In our study, the S11 segment was cloned into the eukaryotic expression vector pcDNA3...
May 12, 2018: Vaccine
https://www.readbyqxmd.com/read/29762162/genetic-characterization-of-the-hiv-1-reservoir-after-vacc-4x-and-romidepsin-therapy-in-hiv-1-infected-individuals
#17
Anni Winckelmann, Vincent Morcilla, Wei Shao, Mariane H Schleimann, Jesper F Højen, Timothy E Schlub, Paul W Denton, Lars Østergaard, Ole S Søgaard, Martin Tolstrup, Sarah Palmer
OBJECTIVE: Therapeutic HIV-1 immunization followed by latency reversal has been suggested as a strategy to eradicate HIV-1. Here we investigate the phylogenetic composition of the HIV-1 regions targeted by the therapeutic HIV-1 peptide vaccine Vacc-4x in participants in a clinical trial. DESIGN: Seventeen participants on suppressive antiretroviral therapy were vaccinated with six doses of Vacc-4x followed by three doses of romidepsin. Seven study participants were selected for sequencing analysis...
May 11, 2018: AIDS
https://www.readbyqxmd.com/read/29761344/beyond-the-magic-bullet-current-progress-of-therapeutic-vaccination-in-multiple-sclerosis
#18
Barbara Willekens, Nathalie Cools
Multiple sclerosis (MS) is a chronic immune-mediated disease of the central nervous system (CNS) characterized by neuroinflammation, neurodegeneration and impaired repair mechanisms that lead to neurological disability. The crux of MS is the patient's own immune cells attacking self-antigens in the CNS, namely the myelin sheath that protects nerve cells of the brain and spinal cord. Restoring antigen-specific tolerance via therapeutic vaccination is an innovative and exciting approach in MS therapy. Indeed, leveraging the body's attempt to prevent autoimmunity, i...
May 14, 2018: CNS Drugs
https://www.readbyqxmd.com/read/29761292/-chronic-hepatitis-b-and-d-delta-current-and-future-treatments
#19
REVIEW
N Wortmann, C Höner Zu Siederdissen, M Cornberg
BACKGROUND: Worldwide, hepatitis B virus (HBV) infection is among the 30 leading causes of death, despite effective vaccination and therapeutic options. Chronic hepatitis delta (coinfection with hepatitis D virus) leads to a rapid disease progression. AIMS: Based on current international guidelines and studies, an overview about present and future therapeutic options for chronic hepatitis B and delta is provided. RESULTS: Therapy with nucleoside or nucleotide analogues leads to nearly complete HBV DNA suppression, which is associated with regression of liver fibrosis and a lower risk for the development of hepatocellular carcinoma...
May 14, 2018: Der Internist
https://www.readbyqxmd.com/read/29761102/reactivation-of-a-vaccine-escape-hepatitis-b-virus-mutant-in-a-cambodian-patient-during-anti-hepatitis-c-virus-therapy
#20
Dahlene N Fusco, Lilia Ganova-Raeva, Yury Khudyakov, Lili Punkova, Aisha Mohamed, Scarlett Se Yun Cheon, Prapti Koirala, Karin L Andersson, Gonzague Jourdain, Camille Sureau, Raymond T Chung, Georg Lauer
A 76-year-old Cambodian man co-infected with hepatitis B virus (HBV) and hepatitis C virus (HCV) 6c-1 presented for care. HBV DNA was intermittently detectable despite anti-HBs levels being above the protective threshold. During treatment for HCV, HBV DNA levels increased. Sequencing revealed multiple mutations including vaccine escape mutation and mutations predicted to enhance fitness. This case represents exacerbation of an HBV vaccine escape mutant during a direct-acting antiviral therapy.
2018: Frontiers in Medicine
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