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https://www.readbyqxmd.com/read/28734175/cd8-t-cell-programming-by-cytomegalovirus-vectors-applications-in-prophylactic-and-therapeutic-vaccination
#1
REVIEW
Klaus Früh, Louis Picker
Vectors based on cytomegalovirus (CMV) represent a novel vaccine platform that maintains high frequencies of non-exhausted effector memory T cells in both CMV sero-positive and sero-negative individuals. In non-human primate models, CMV vectored vaccines provide unprecedented protection against simian immunodeficiency virus (SIV). Moreover, CMV vectors can be genetically altered to program highly diverse CD8+ T cell responses that differ in their epitope targeting including conventional, MHC-I restricted CD8+ T cells as well as unconventional CD8+ T cells restricted by MHC class II or non-polymorphic MHC-E...
July 19, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28732070/characterization-of-human-enterovirus71-virus-like-particles-used-for-vaccine-antigens
#2
Dandan Zhao, Bo Sun, Shiyang Sun, Bin Fu, Chuntian Liu, Dawei Liu, Yanfei Chu, Youlei Ma, Lu Bai, Yongge Wu, Yan Zhou, Weiheng Su, Ali Hou, Linjun Cai, Fei Xu, Wei Kong, Chunlai Jiang
Human enterovirus 71 (EV71) is a major causative pathogen of hand, foot and mouth disease (HFMD) and has caused outbreaks with significant mortality among young children in the Asia-Pacific region in recent years. Towards developing a vaccine for this disease, we have expressed and purified EV71 virus-like particles (VLPs), which resemble the authentic virus in appearance, capsid structure and protein sequence, from insect cells (Sf9) using a multistep chromatography process. We demonstrated intracellular localization of the VLPs in host cells by in situ immunogold detection, electron microscopy and immunofluorescence...
2017: PloS One
https://www.readbyqxmd.com/read/28731899/current-perspectives-on-invasive-nontyphoidal-salmonella-disease
#3
Andrea H Haselbeck, Ursula Panzner, Justin Im, Stephen Baker, Christian G Meyer, Florian Marks
PURPOSE OF REVIEW: We searched PubMed for scientific literature published in the past 2 years for relevant information regarding the burden of invasive nontyphoidal Salmonella disease and host factors associated with nontyphoidal Salmonella infection and discuss current knowledge on vaccine development. The following search terms were used: Salmonella, non typhoidal/nontyphoidal, NTS, disease, bloodstream infection, invasive, sepsis/septicaemia/septicemia, bacteraemia/bacteremia, gastroenteritis, incidence, prevalence, morbidity, mortality, case fatality, host/risk factor, vaccination, and prevention/control...
July 20, 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/28730155/surveillance-study-of-influenza-occurrence-and-immunity-in-a-wisconsin-cohort-during-the-2009-pandemic
#4
Chia-Yun Lo, Susan L Strobl, Kimberly Dunham, Wei Wang, Lucy Stewart, Julia A Misplon, Mayra Garcia, Jin Gao, Tatsuhiko Ozawa, Graeme E Price, Jose Navidad, Steve Gradus, Sanjib Bhattacharyya, Cecile Viboud, Maryna C Eichelberger, Carol D Weiss, Jack Gorski, Suzanne L Epstein
BACKGROUND: Antibody and T-cell immunity to conserved influenza virus antigens can protect animals against infection with diverse influenza strains. Although immunity against conserved antigens occurs in humans, whether such responses provide cross-protection in humans and could be harnessed as the basis for universal influenza vaccines is controversial. The 2009 pandemic provided an opportunity to investigate whether pre-existing cross-reactive immunity affected susceptibility to infection...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28729879/safety-and-immunogenicity-of-the-quadrivalent-human-papillomavirus-qhpv-vaccine-in-hiv-positive-spanish-men-who-have-sex-with-men-msm
#5
Carmen Hidalgo-Tenorio, Jessica Ramírez-Taboada, Concepción Gil-Anguita, Javier Esquivias, Mohamed Omar-Mohamed-Balgahata, Antonio SamPedro, Miguel Lopez-Ruz, Juan Pasquau
BACKGROUND: Safety and immunogenicity of the quadrivalent human papillomavirus (qHPV) vaccine were evaluated in HIV-positive Spanish MSM. The prevalence of High Squamous Intraepithelial Lesions (HSIL) and genotypes of high-risk human papillomavirus (HR-HPV) were also determined, as well as risk factors associated with the presence of HR-HPV in anal mucosa. METHODS: This is a randomised, double blind, placebo-controlled trial of the quadrivalent HPV (qHPV) vaccine...
2017: AIDS Research and Therapy
https://www.readbyqxmd.com/read/28729359/the-%C3%AE-defensin-retrocyclin-101-inhibits-tlr4-and-tlr2-dependent-signaling-and-protects-mice-against-influenza-infection
#6
Daniel Prantner, Kari Ann Shirey, Wendy Lai, Wuyuan Lu, Alexander M Cole, Stefanie N Vogel, Alfredo Garzino-Demo
Despite widespread use of annual influenza vaccines, seasonal influenza-associated deaths number in the thousands each year, in part because of exacerbating bacterial superinfections. Therefore, discovering additional therapeutic options would be a valuable aid to public health. Recently, TLR4 inhibition has emerged as a possible mechanism for protection against influenza-associated lethality and acute lung injury. Based on recent data showing that rhesus macaque θ-defensins could inhibit TLR4-dependent gene expression, we tested the hypothesis that a novel θ-defensin, retrocyclin (RC)-101, could disrupt TLR4-dependent signaling and protect against viral infection...
July 20, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28729020/purification-of-cell-culture-derived-influenza-a-virus-via-continuous-anion-exchange-chromatography-on-monoliths
#7
Laura M Fischer, Michael W Wolff, Udo Reichl
The continuously increasing demand for potent and safe vaccines and the intensifying economic pressure on health care systems underlines the need for further optimization of vaccine manufacturing. Here, we focus on downstream processing of human influenza vaccines, investigating the purification of serum-free cell culture-derived influenza virus (A/PR/8/34 H1N1) using continuous chromatography. Therefore, quaternary amine anion exchange monoliths (CIM® QA) were characterized for their capacity to capture virus particles from animal cells cultivated in different media and their ability to separate virions from contaminating host cell proteins and DNA...
July 17, 2017: Vaccine
https://www.readbyqxmd.com/read/28728590/chikungunya-virus-infection-in-cynomolgus-macaques-following-intradermal-and-aerosol-exposure
#8
Chris M Cirimotich, Eric M Vela, Jennifer Garver, Roy E Barnewall, Brian D Miller, Gabriel T Meister, James V Rogers
BACKGROUND: Chikungunya virus (CHIKV) is transmitted via mosquito bite and potentially by aerosol, causing chikungunya fever and arthritic disease in humans. There are currently no licensed vaccines or antiviral therapeutics to protect against CHIKV infection in humans. Animal models recapitulating human disease, especially for transmission by aerosol, are needed for licensure of such medical countermeasures. METHODS: Cynomolgus macaques (CMs) were challenged by intradermal (ID) inoculation or exposure to an aerosol containing CHIKV Ross strain at different target infectious doses (10(3)-10(7) plaque forming units (PFU))...
July 20, 2017: Virology Journal
https://www.readbyqxmd.com/read/28728309/escherichia-coli-outer-membrane-protein-f-ompf-an-immunogenic-protein-induces-cross-reactive-antibodies-against-escherichia-coli-and-shigella
#9
Xiao Wang, Da Teng, Qingfeng Guan, Ruoyu Mao, Ya Hao, Xiumin Wang, Junhu Yao, Jianhua Wang
Diarrhea caused by pathogenic Escherichia coli (E. coli) is one of the most serious infectious diseases in humans and animals. Due to antibiotics resistance and the lack of efficient vaccine, more attention should be paid to find potential versatile vaccine candidates to prevent diseases. In this study, the sequence homology analysis indicated that OmpF from E. coli CVCC 1515 shares a high identity (90-100%) with about half of the E. coli (46.7%) and Shigella (52.8%) strains. Then the recombinant OmpF was supposed to be developed as a versatile vaccine to prevent E...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28728074/no-pain-no-gain-adjuvant-effects-of-alum-and-monophosphoryl-lipid-a-in-pertussis-and-hpv-vaccines
#10
REVIEW
Thomas C Mitchell, Carolyn R Casella
Development of non-infectious subunit vaccines is hampered by a slow pipeline of new adjuvants to replace or enhance alum in part because expectations of safety are high. Transient vaccine side effects are not clinical priorities because they cause no lasting harm and vaccine development has appropriately been focused on avoidance of serious adverse events. As a result, surprisingly little is known about the extent to which side effects caused by a vaccine's reactogencicity are predictive of successful immunization outcomes...
July 17, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28726109/the-study-of-immunogenicity-of-the-antigenic-protein-of-high-risk-oncogenic-type-of-the-human-papillomavirus-hpv16-l1-produced-in-the-plant-expression-system-on-the-base-of-transgenic-tomato
#11
R K Salyaev, N I Rekoslavskaya, A S Stolbikov, A V Tretyakova
The immunogenicity of plant-made peroral vaccine against cervical cancer was studied in mice during 342 days after vaccination with the material of tomato fruits genetically transformed with HPV16 L1 Ώ 5'UTR TMV. The immune response was found on day 4 after vaccination in blood serum of vaccinated mice. On days 90-100, the rise to maximum value of the level of antibodies to HPV16 L1 was in the range of 500 ng of the standard antibodies to HPV16 L1 (Santa Cruz Biotechnology, United States). This level of antibodies was retained until the end of the study...
May 2017: Doklady. Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28725639/anaplasma-phagocytophilum-msp4-and-hsp70-proteins-are-involved-in-interactions-with-host-cells-during-pathogen-infection
#12
Marinela Contreras, Pilar Alberdi, Lourdes Mateos-Hernández, Isabel G Fernández de Mera, Ana L García-Pérez, Marie Vancová, Margarita Villar, Nieves Ayllón, Alejandro Cabezas-Cruz, James J Valdés, Snorre Stuen, Christian Gortazar, José de la Fuente
Anaplasma phagocytophilum transmembrane and surface proteins play a role during infection and multiplication in host neutrophils and tick vector cells. Recently, A. phagocytophilum Major surface protein 4 (MSP4) and Heat shock protein 70 (HSP70) were shown to be localized on the bacterial membrane, with a possible role during pathogen infection in ticks. In this study, we hypothesized that A. phagocytophilum MSP4 and HSP70 have similar functions in tick-pathogen and host-pathogen interactions. To address this hypothesis, herein we characterized the role of these bacterial proteins in interaction and infection of vertebrate host cells...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28725449/therapeutic-options-for-treatment-of-human-papillomavirus-associated-cancers-novel-immunologic-vaccines-adxs11-001
#13
REVIEW
Brett Miles, Howard P Safran, Bradley J Monk
Survival of patients with advanced, recurrent, or metastatic human papillomavirus (HPV)-associated cancer is suboptimal despite the availability of various treatment modalities. The recently developed bacterial vector Listeria monocytogenes (Lm) activates innate and adaptive immune responses and is expected to offer immunologic advantages. Axalimogene filolisbac (AXAL or ADXS11-001) is a novel immunotherapeutic based on the live, irreversibly attenuated Lm fused to the nonhemolytic fragment of listeriolysin O (Lm-LLO) and secretes the Lm-LLO-HPV E7 fusion protein targeting HPV-positive tumors...
2017: Gynecologic Oncology Research and Practice
https://www.readbyqxmd.com/read/28725225/antiviral-functions-of-human-immunodeficiency-virus-type-1-hiv-1-specific-igg-antibodies-effects-of-antiretroviral-therapy-and-implications-for-therapeutic-hiv-1-vaccine-design
#14
REVIEW
Martyn A French, M Christian Tjiam, Laila N Abudulai, Sonia Fernandez
Contemporary antiretroviral therapy (ART) is effective and tolerable for long periods of time but cannot eradicate human immunodeficiency virus type 1 (HIV-1) infection by either elimination of viral reservoirs or enhancement of HIV-1-specific immune responses. Boosting "protective" HIV-1-specific immune responses by active or passive immunization will therefore be necessary to control or eradicate HIV-1 infection and is currently the topic of intense investigation. Recently reported studies conducted in HIV patients and non-human primate (NHP) models of HIV-1 infection suggest that HIV-1-specific IgG antibody responses may contribute to the control of HIV-1 infection...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28724769/stlv-1-infection-of-papio-anubis-tax-sequence-heterogeneity-and-t-cell-recognition
#15
James M Termini, Diogo M Magnani, Helen S Maxwell, William Lauer, Iris Castro, Jerilyn Pecotte, Glen N Barber, David I Watkins, Ronald C Desrosiers
Natural infection of baboons with simian T lymphotropic virus (STLV) is a potentially useful model system for study of vaccination against the human virus HTLV. Here we expand the number of available full-length STLV-1 baboon sequences from one to three and relate T cell responses that recognize the immunodominant Tax protein to the tax sequences present in two individual baboons. Continuously growing T cell lines were established from two baboons, 12141 and 12752. Next-generation sequencing (NGS) of complete STLV genome sequences from these lines revealed them to be closely related but distinct from each other and from the STLV-1 baboon sequence in the NCBI sequence database...
July 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28724763/species-specificity-of-vaccinia-virus-complement-control-protein-towards-bovine-classical-pathway-is-governed-primarily-by-direct-interaction-of-its-acidic-residues-with-factor-i
#16
Jitendra Kumar, Viveka Nand Yadav, Swastik Phulera, Ashish Kamble, Avneesh Kumar Gautam, Hemendra Singh Panwar, Arvind Sahu
Poxviruses display species tropism - variola virus is a human-specific virus, while vaccinia virus causes repeated outbreaks in dairy cattle. Consistent with this, variola virus complement regulator SPICE exhibit selectivity in inhibiting the human alternative complement pathway and vaccinia virus complement regulator VCP display selectivity in inhibiting the bovine alternative complement pathway. In the present study, we examined the species-specificity of VCP and SPICE towards the classical pathway (CP). We observed that VCP is ∼43-fold superior in inhibiting bovine CP than SPICE...
July 19, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28724741/body-height-and-immune-efficacy-testing-body-stature-as-a-signal-of-biological-quality
#17
Bogusław Pawłowski, Judyta Nowak, Barbara Borkowska, Daria Augustyniak, Zuzanna Drulis-Kawa
According to the good genes hypothesis and energy allocation theory, human adult body height may reflect biological quality. An important aspect of this quality is immune system functioning (ISF). The aim of this study was to evaluate the relationship between ISF and body height in healthy people. The ISF was determined by several important innate (total complement and lysozyme activity, neutrophil function) and adaptive immune parameters (lymphocytes, IgA and IgG, and response to the flu vaccine). Overall, 96 males and 97 females were subjected to flu vaccination, and of these, 35 males and 34 females were subjected to tetanus...
July 26, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28724524/assignment-of-weight-based-antibody-units-for-four-additional-serotypes-to-a-human-anti-pneumococcal-standard-reference-serum-007sp
#18
D Goldblatt, A McKeen, P Burbidge, S McElhiney, L McLaughlin, A Johnson, M Rauh, P C Giardina
The pneumococcal ELISA reference standard serum, Lot 89SF, has been in use since 1990 and was replaced with a new reference standard serum, 007sp in 2013. This serum was generated under an FDA-approved clinical protocol, where 278 adult volunteers were immunized with the 23-valent unconjugated polysaccharide vaccine, Pneumovax II®, and a unit of blood was obtained twice within 120 days following immunization. Pooled serum was prepared from the plasma, filled at 6ml per vial and lyophilised. Five independent laboratories participated in bridging the serotype specific IgG assignments for 89SF to 007sp to establish equivalent reference values for 13 pneumococcal capsular serotypes (1,3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, 23F) using the WHO reference ELISA...
July 19, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28723925/immunologic-response-to-vaccine-challenge-in-pregnant-ptpn22-r620w-carriers-and-non-carriers
#19
Shelly H Tien, Juliet N Crabtree, Heather L Gray, Erik J Peterson
OBJECTIVES: Influenza infection is a significant cause of respiratory morbidity among pregnant women. Seasonal influenza vaccination engages innate immune receptors to promote protective immunity. A coding polymorphism (R620W) in PTPN22 imparts elevated risk for human infection and autoimmune disease, predisposes to diminished innate immune responses, and associates with reduced immunization responses. We sought to quantify the effects of PTPN22-R620W on humoral and cell-mediated immune responses to the inactivated influenza vaccine among healthy pregnant women...
2017: PloS One
https://www.readbyqxmd.com/read/28723743/analysis-of-hpv-distribution-in-patients-with-cervical-precancerous-lesions-in-western-china
#20
Kemin Li, Rutie Yin, Qingli Li, Danqing Wang
Cervical human papillomavirus (HPV) infection is a dangerous disease, whose subtypes exhibit different distribution patterns in particular countries, regions, and races. In this study, the HPV distribution in patients with cervical precancerous lesions in Western China was investigated to assess a probability for prevention of cervical cancer and the clinical application of an HPV vaccine in China. The retrospective study of patients with different HPV subtypes and cervical precancerous lesions, who have undergone loop eelectrosurgical excision procedure, cold knife conization, or a total hysterectomy in our hospital from January 2016 to August 2016, was performed...
July 2017: Medicine (Baltimore)
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