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https://www.readbyqxmd.com/read/28817682/experimental-study-of-tuberculosis-from-animal-models-to-complex-cell-systems-and-organoids
#1
REVIEW
Kaori L Fonseca, Pedro N S Rodrigues, I Anna S Olsson, Margarida Saraiva
Tuberculosis (TB) is a devastating disease to mankind that has killed more people than any other infectious disease. Despite many efforts and successes from the scientific and health communities, the prospect of TB elimination remains distant. On the one hand, sustainable public health programs with affordable and broad implementation of anti-TB measures are needed. On the other hand, achieving TB elimination requires critical advances in three areas: vaccination, diagnosis, and treatment. It is also well accepted that succeeding in advancing these areas requires a deeper knowledge of host-pathogen interactions during infection, and for that, better experimental models are needed...
August 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28817118/altered-marginal-zone-and-innate-like-b-cells-in-aged-senescence-accelerated-samp8-mice-with-defective-igg1-responses
#2
Isabel Cortegano, Mercedes Rodríguez, Isabel Martín, Maria Carmen Prado, Carolina Ruíz, Rafael Hortigüela, Mario Alía, Marçal Vilar, Helena Mira, Eva Cano, Mercedes Domínguez, Belén de Andrés, María Luisa Gaspar
Aging has a strong impact on the activity of the immune system, enhancing susceptibility to pathogens and provoking a predominant pre-inflammatory status, whereas dampening responses to vaccines in humans and mice. Here, we demonstrate a loss of marginal zone B lymphocytes (MZ, CD19(+)CD45R(+)CD21(++)CD23(lo)) and a decrease of naive B cells (CD19(+)IgD(+)), whereas there is an enhancement of a CD19(+)CD45R(lo) innate-like B cell population (B1REL) and the so-called aged B cell compartment (ABC, CD45R(+)CD21(lo)CD23(lo)CD5(-)CD11b(-)) in aged senescence-accelerated (SAMP8) mice but not in aged senescence-resistant (SAMR1) mice...
August 17, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28816622/obtention-and-characterization-of-the-recombinant-simian-interleukin-15-in-escherichia-coli-for-the-preclinical-assessment-of-an-il-15-based-therapeutic-vaccine
#3
Yunier Rodríguez-Álvarez, Klaudia Martínez-Cordovez, Alexey Llopiz-Arzuaga, Yassel Ramos-Pérez, Vladimir Besada-Pérez, Dayana García-Lines, Alicia Santos-Savio
Recombinant simian IL-15 (siIL-15) was obtained for the preclinical assessment of an anti-human IL-15 vaccine. For this purpose, the cDNA from peripheral blood mononuclear cells of a Macaca fascicularis monkey was cloned into a pIL-2 vector. The siIL-15 was expressed in E. coli strain W3110 as an insoluble protein which accounted for 13% of the total cellular proteins. Inclusion bodies were solubilized in an 8 M urea solution, which was purified by ion exchange and reverse phase chromatography up to 92% purity...
August 17, 2017: Preparative Biochemistry & Biotechnology
https://www.readbyqxmd.com/read/28816583/mammalian-cell-surface-display-for-monoclonal-antibody-based-facs-selection-of-viral-envelope-proteins
#4
Tim-Henrik Bruun, Veronika Grassmann, Benjamin Zimmer, Benedikt Asbach, David Peterhoff, Alexander Kliche, Ralf Wagner
The elicitation of broadly and efficiently neutralizing antibodies in humans by active immunization is still a major obstacle in the development of vaccines against pathogens such as the human immunodeficiency virus (HIV), influenza virus, hepatitis C virus or cytomegalovirus. Here, we describe a mammalian cell surface display and monoclonal antibody (mAb)-mediated panning technology that allows affinity-based selection of envelope (Env) variants from libraries. To this end, we established an experimental setup featuring: 1) single and site specific integration of Env to link genotype and phenotype, 2) inducible Env expression to avoid cytotoxicity effects, 3) translational coupling of Env and enhanced green fluorescent protein expression to normalize for Env protein levels, and 4) display on HEK cells to ensure native folding and mammalian glycosylation...
August 17, 2017: MAbs
https://www.readbyqxmd.com/read/28816084/adenoviral-type-35-and-26-vectors-with-a-bidirectional-expression-cassette-in-the-e1-region-show-an-improved-genetic-stability-profile-and-potent-transgene-specific-immune-response
#5
Marija Vujadinovic, Kerstin Wunderlich, Benoit Callendret, Marina Koning, Mark Vermeulen, Barbara Sanders, Esmeralda van der Helm, Adile Gecgel, Dirk Spek, Karin de Boer, Masha Stalknecht, Jan Serroyen, Maria Grazia Pau, Hanneke Schuitemaker, Roland Zahn, Jerome Custers, Jort Vellinga
Genetic vaccines based on replication-incompetent adenoviral (AdV) vectors are currently in clinical development. Monovalent AdV vectors express one antigen from an expression cassette placed in most cases in the E1 region. For many vaccines, inclusion of several antigens is necessary in order to raise protective immunity and/or target more than one pathogen or pathogen strain. Based on the current technology, a mix of several monovalent vectors can be employed. However, a mix of the standard monovalent AdV may not be optimal with respect to manufacturing costs and the final dose per vector in humans...
August 17, 2017: Human Gene Therapy
https://www.readbyqxmd.com/read/28815421/knowledge-beliefs-and-attitudes-of-somali-men-in-olmsted-county-minnesota-u-s-on-the-human-papillomavirus-vaccine-and-cervical-cancer-screening-january-17-2015
#6
Uzoma Abakporo, Abdirahman Hussein, James W Begun, Tetyana Shippee
This study explores the general knowledge of Human Papillomavirus vaccine (HPV) and cervical cancer screening (CCS) among Somali men in the U.S., who are major decision-makers in Somali households. HPV infects both men and women, and causes genital warts and cervical cancer (CC). High mortality from CC persists among minorities due to low uptake of preventive tools. Eleven questions assessed general knowledge of HPV and CCS among 30 Somali male respondents. The knowledge of HPV and CCS by education level, age, and years lived in the U...
August 16, 2017: Journal of Immigrant and Minority Health
https://www.readbyqxmd.com/read/28814523/screening-of-fda-approved-drugs-for-inhibitors-against-japanese-encephalitis-virus-infection
#7
Shaobo Wang, Yang Liu, Jiao Guo, Peilin Wang, Leike Zhang, Gengfu Xiao, Wei Wang
Japanese encephalitis virus (JEV), an arthropod-borne flavivirus, is a major cause of acute viral encephalitis in humans. There is no approved drug available for JEV-specific treatment, and the vaccines are not effective against all clinical JEV isolates. Herein, a high-throughput screening was performed against JEV from an FDA-approved drug library. Five hit drugs were identified that inhibited JEV infection with a selective index > 10. Antiviral activities of these five hit drugs against other flavivirus, including Zika virus, were also validated...
August 16, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28814066/mice-expressing-human-erap1-variants-associated-with-ankylosing-spondylitis-have-altered-t-cell-repertoires-and-nk-cell-functions-as-well-as-increased-in-utero-and-perinatal-mortality
#8
David P W Rastall, Fadel S Alyaquob, Patrick O'Connell, Yuliya Pepelyayeva, Douglas Peters, Sarah Godbehere-Roosa, Cristiane Pereira-Hicks, Yasser A Aldhamen, Andrea Amalfitano
Specific variants of endoplasmic reticulum-associated aminopeptidase 1 (ERAP1) identified by genome-wide association study modify the risk for developing ankylosing spondylitis. We previously confirmed that disease-associated ERAP1 variants have altered enzymatic abilities that can impact upon the production of pro-inflammatory cytokines from cells expressing the same ERAP1 variants. To determine if these ERAP1 variants also impacted immune responses in vivo, we generated two strains of transgenic mice expressing human ERAP1 genes containing non-synonymous single-nucleotide polymorphisms associated with an increased (ERAP1-High) or decreased (ERAP1-Low) risk for developing autoimmune disease...
June 1, 2017: International Immunology
https://www.readbyqxmd.com/read/28813507/comparison-of-homologous-and-heterologous-prime-boost-vaccine-approaches-using-modified-vaccinia-ankara-and-soluble-protein-to-induce-neutralizing-antibodies-by-the-human-cytomegalovirus-pentamer-complex-in-mice
#9
Flavia Chiuppesi, Felix Wussow, Louise Scharf, Heidi Contreras, Han Gao, Zhuo Meng, Jenny Nguyen, Peter A Barry, Pamela J Bjorkman, Don J Diamond
Since neutralizing antibodies (NAb) targeting the human cytomegalovirus (HCMV) pentamer complex (PC) potently block HCMV host cell entry, anti-PC NAb induction is thought to be important for a vaccine formulation to prevent HCMV infection. By developing a vaccine strategy based on soluble PC protein and using a previously generated Modified Vaccinia Ankara vector co-expressing all five PC subunits (MVA-PC), we compared HCMV NAb induction by homologous immunization using prime-boost vaccine regimen employing only PC protein or MVA-PC and heterologous immunization using prime-boost combinations of PC protein and MVA-PC...
2017: PloS One
https://www.readbyqxmd.com/read/28813462/a-comprehensive-profiling-of-t-and-b-lymphocyte-receptor-repertoires-from-a-chinese-origin-rhesus-macaque-by-high-throughput-sequencing
#10
Longfei Fu, Xinyang Li, Wei Zhang, Changxi Wang, Jinghua Wu, Huanming Yang, Jian Wang, Xiao Liu
Due to the close genetic background, high similarity of physiology, and susceptibility to infectious and metabolic diseases with humans, rhesus macaques have been widely used as an important animal model in biomedical research, especially in the study of vaccine development and human immune-related diseases. In recent years, high-throughput sequencing based immune repertoire sequencing (IR-SEQ) has become a powerful tool to study the dynamic adaptive immune responses. Several previous studies had analyzed the responses of B cells to HIV-1 trimer vaccine or T cell repertoire of rhesus macaques using this technique, however, there are little studies that had performed a comprehensive analysis of immune repertoire of rhesus macaques, including T and B lymphocytes...
2017: PloS One
https://www.readbyqxmd.com/read/28812836/understanding-internal-accountability-in-nigeria-s-routine-immunization-system-perspectives-from-government-officials-at-the-national-state-and-local-levels
#11
Daniel J Erchick, Asha S George, Chukwunonso Umeh, Chizoba Wonodi
BACKGROUND: Routine immunization coverage in Nigeria has remained low, and studies have identified a lack of accountability as a barrier to high performance in the immunization system. Accountability lies at the heart of various health systems strengthening efforts recently launched in Nigeria, including those related to immunization. Our aim was to understand the views of health officials on the accountability challenges hindering immunization service delivery at various levels of government...
December 10, 2016: International Journal of Health Policy and Management
https://www.readbyqxmd.com/read/28812835/impact-of-health-research-systems-on-under-5-mortality-rate-a-trend-analysis
#12
Bahareh Yazdizadeh, Mahboubeh Parsaeian, Reza Majdzadeh, Sima Nikooee
BACKGROUND: Between 1990 and 2015, under-5 mortality rate (U5MR) declined by 53%, from an estimated rate of 91 deaths per 1000 live births to 43, globally. The aim of this study was to determine the share of health research systems in this decrease alongside other influential factors. METHODS: We used random effect regression models including the 'random intercept' and 'random intercept and random slope' models to analyze the panel data from 1990 to 2010. We selected the countries with U5MRs falling between the first and third quartiles in 1990...
November 26, 2016: International Journal of Health Policy and Management
https://www.readbyqxmd.com/read/28812825/evaluating-global-health-partnerships-a-case-study-of-a-gavi-hpv-vaccine-application-process-in-uganda
#13
Carol Kamya, Jessica Shearer, Gilbert Asiimwe, Emily Carnahan, Nicole Salisbury, Peter Waiswa, Jennifer Brinkerhoff, Dai Hozumi
BACKGROUND: Global health partnerships have grown rapidly in number and scope, yet there has been less emphasis on their evaluation. Gavi, the Vaccine Alliance, is one such public-private partnership; in Gavi-eligible countries partnerships are dynamic networks of immunization actors who work together to support all stages and aspects of Gavi support. This paper describes a conceptual framework - the partnership framework - and analytic approach for evaluating the perceptions of partnerships' added value as well as the results from an application to one case in Uganda...
October 26, 2016: International Journal of Health Policy and Management
https://www.readbyqxmd.com/read/28812030/safety-of-human-papillomavirus-9-valent-vaccine-a-meta-analysis-of-randomized-trials
#14
REVIEW
Ana Paula Ferreira Costa, Ricardo Ney Oliveira Cobucci, Janine Medeiros da Silva, Paulo Henrique da Costa Lima, Paulo César Giraldo, Ana Katherine Gonçalves
Vaccination against human papillomavirus (HPV) has been progressively implemented in most developed countries for approximately 10 years. In order to increase the protection of the vaccines, a 9-valent vaccine (HPV9) was developed, which provides protection against nine types of the virus. Studies evaluating its safety are rare. Thus, we performed a meta-analysis of three clinical trials assessing adverse effects on women randomly vaccinated with HPV9 or tetravalent vaccine (HPV4), with the objective of analyzing whether the HPV9 is as safe as HPV4...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28811969/k27m-mutant-histone-3-as-a-novel-target-for-glioma-immunotherapy
#15
Katharina Ochs, Martina Ott, Theresa Bunse, Felix Sahm, Lukas Bunse, Katrin Deumelandt, Jana K Sonner, Melanie Keil, Andreas von Deimling, Wolfgang Wick, Michael Platten
Mutation-specific vaccines have become increasingly important in glioma immunotherapy; however, shared neoepitopes are rare. For diffuse gliomas, a driver mutation in the gene for isocitrate dehydrogenase type-1 has been shown to produce an immunogenic epitope currently targeted in clinical trials. For highly aggressive midline gliomas, a recurrent point mutation in the histone-3 gene (H3F3A) causes an amino acid change from lysine to methionine at position 27 (K27M). Here, we demonstrate that a peptide vaccine against K27M-mutant histone-3 is capable of inducing effective, mutation-specific, cytotoxic T-cell- and T-helper-1-cell-mediated immune responses in a major histocompatibility complex (MHC)-humanized mouse model...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28811473/plant-made-polio-type-3-stabilized-vlps-a-candidate-synthetic-polio-vaccine
#16
Johanna Marsian, Helen Fox, Mohammad W Bahar, Abhay Kotecha, Elizabeth E Fry, David I Stuart, Andrew J Macadam, David J Rowlands, George P Lomonossoff
Poliovirus (PV) is the causative agent of poliomyelitis, a crippling human disease known since antiquity. PV occurs in two distinct antigenic forms, D and C, of which only the D form elicits a robust neutralizing response. Developing a synthetically produced stabilized virus-like particle (sVLP)-based vaccine with D antigenicity, without the drawbacks of current vaccines, will be a major step towards the final eradication of poliovirus. Such a sVLP would retain the native antigenic conformation and the repetitive structure of the original virus particle, but lack infectious genomic material...
August 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28811347/tifa-signaling-in-gastric-epithelial-cells-initiates-the-cag-type-4-secretion-system-dependent-innate-immune-response-to-helicobacter-pylori-infection
#17
Alevtina Gall, Ryan G Gaudet, Scott D Gray-Owen, Nina R Salama
Helicobacter pylori is a bacterial pathogen that colonizes the human stomach, causing inflammation which, in some cases, leads to gastric ulcers and cancer. The clinical outcome of infection depends on a complex interplay of bacterial, host genetic, and environmental factors. Although H. pylori is recognized by both the innate and adaptive immune systems, this rarely results in bacterial clearance. Gastric epithelial cells are the first line of defense against H. pylori and alert the immune system to bacterial presence...
August 15, 2017: MBio
https://www.readbyqxmd.com/read/28810358/human-papillomavirus-vaccine-information-motivation-and-behavioral-skills-among-young-adult-us-women
#18
Erika L Thompson, Cheryl A Vamos, Diane M Straub, William M Sappenfield, Ellen M Daley
This study elicited the information needs, motivations, and behavioral skills related to human papillomavirus vaccine decision-making among young adult women. Interviews were conducted with college women, aged 18-26 years, and stratified by recently vaccinated ( N = 25) and unvaccinated ( N = 25). Comparative thematic analysis using the Information, Motivation, and Behavioral Skills Model was conducted. Healthcare providers were identified as the most trusted sources for information. While unvaccinated women did not have experience receiving the vaccine, they reported the same procedural knowledge for vaccination...
October 1, 2016: Journal of Health Psychology
https://www.readbyqxmd.com/read/28810165/human-immune-system-mouse-models-of-ebola-virus-infection
#19
REVIEW
Jessica R Spengler, Joseph Prescott, Heinz Feldmann, Christina F Spiropoulou
Human immune system (HIS) mice, immunodeficient mice engrafted with human cells (with or without donor-matched tissue), offer a unique opportunity to study pathogens that cause disease predominantly or exclusively in humans. Several HIS mouse models have recently been used to study Ebola virus (EBOV) infection and disease. The results of these studies are encouraging and support further development and use of these models in Ebola research. HIS mice provide a small animal model to study EBOV isolates, investigate early viral interactions with human immune cells, screen vaccines and therapeutics that modulate the immune system, and investigate sequelae in survivors...
August 11, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/28809151/the-pentameric-complex-of-human-cytomegalovirus-cell-tropism-virus-dissemination-immune-response-and-vaccine-development
#20
Giuseppe Gerna, Maria Grazia Revello, Fausto Baldanti, Elena Percivalle, Daniele Lilleri
Between the 1980s and 1990s, three assays were developed for diagnosis of human cytomegalovirus (HCMV) infections: leuko (L)-antigenemia, l-viremia and l-DNAemia, detecting viral protein pp65, infectious virus and viral DNA, respectively, in circulating leukocytes Repeated initial attempts to reproduce the three assays in vitro using laboratory-adapted strains and infected cell cultures were consistently unsuccessful. Results were totally reversed when wild-type HCMV strains were used to infect either fibroblasts or endothelial cells...
August 15, 2017: Journal of General Virology
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