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AIDS Vaccine

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https://www.readbyqxmd.com/read/28339668/immunogenicity-of-a-booster-dose-of-quadrivalent-meningococcal-conjugate-vaccine-in-previously-immunized-hiv-infected-children-and-youth
#1
Meredith G Warshaw, George K Siberry, Paige Williams, Michael D Decker, Patrick Jean-Philippe, Jorge Lujan-Zilbermann
Background.: The US Advisory Committee on Immunization Practices recommends a booster dose of quadrivalent meningococcal conjugate vaccine (MCV4) after initial immunization for patients at high risk for meningococcal infection. Methods.: The International Maternal Pediatric Adolescents AIDS Clinical Trials (IMPAACT) P1065 trial evaluated the use of MCV4 in human immunodeficiency virus (HIV)-infected children and youth. The final step of this trial was an open-label study of an MCV4 booster dose 3...
February 18, 2017: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/28337203/a-universal-vaccine-against-leptospirosis-are-we-going-in-the-right-direction
#2
André Alex Grassmann, Jéssica Dias Souza, Alan John Alexander McBride
Leptospirosis is the most widespread zoonosis in the world and a neglected tropical disease estimated to cause severe infection in more than one million people worldwide every year that can be combated by effective immunization. However, no significant progress has been made on the leptospirosis vaccine since the advent of bacterins over 100 years. Although protective against lethal infection, particularly in animals, bacterin-induced immunity is considered short term, serovar restricted, and the vaccine can cause serious side effects...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28328984/using-simulation-to-aid-trial-design-ring-vaccination-trials
#3
Matt David Thomas Hitchings, Rebecca Freeman Grais, Marc Lipsitch
BACKGROUND: The 2014-6 West African Ebola epidemic highlights the need for rigorous, rapid clinical trial methods for vaccines. A challenge for trial design is making sample size calculations based on incidence within the trial, total vaccine effect, and intracluster correlation, when these parameters are uncertain in the presence of indirect effects of vaccination. METHODS AND FINDINGS: We present a stochastic, compartmental model for a ring vaccination trial. After identification of an index case, a ring of contacts is recruited and either vaccinated immediately or after 21 days...
March 22, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28326907/skin-sensitizers-in-cosmetics-and-beyond-potential-multiple-mechanisms-of-action-and-importance-of-t-cell-assays-for-in-vitro-screening
#4
Stanislav Vukmanović, Nakissa Sadrieh
Allergic contact dermatitis (ACD) is a delayed-type hypersensitivity (DTH) reaction induced by repeated contact with sensitizers. The ability of a chemical to act as a sensitizer has most frequently been tested in animals. As the use of animals for these purposes is gradually and globally being phased out, there is a need for reliable in vitro surrogate assays. Currently proposed in vitro assays are designed to test four key events of the adverse outcome pathway (AOP) involving covalent modification of self-proteins by sensitizers (haptenation) and presentation of new antigens (hapten/carrier complexes) to the immune system...
March 22, 2017: Critical Reviews in Toxicology
https://www.readbyqxmd.com/read/28320938/effectiveness-of-unaids-targets-and-hiv-vaccination-across-127-countries
#5
Jan Medlock, Abhishek Pandey, Alyssa S Parpia, Amber Tang, Laura A Skrip, Alison P Galvani
The HIV pandemic continues to impose enormous morbidity, mortality, and economic burdens across the globe. Simultaneously, innovations in antiretroviral therapy, diagnostic approaches, and vaccine development are providing novel tools for treatment-as-prevention and prophylaxis. We developed a mathematical model to evaluate the added benefit of an HIV vaccine in the context of goals to increase rates of diagnosis, treatment, and viral suppression in 127 countries. Under status quo interventions, we predict a median of 49 million [first and third quartiles 44M, 58M] incident cases globally from 2015 to 2035...
March 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28301593/knowledge-attitudes-and-practices-of-south-african-healthcare-workers-regarding-the-prevention-and-treatment-of-influenza-among-hiv-infected-individuals
#6
Jazmin Duque, Sisanda Gaga, David Clark, Madeleine Muller, Bulenani Kuwane, Cheryl Cohen, Sibongile Walaza, Stefano Tempia, Puleng Ramatoboe, Tsakani Furumele, Marc-Alain Widdowson, Meredith L McMorrow, Adam L Cohen
BACKGROUND: The South African Department of Health (DOH) publishes annual guidelines identifying priority groups, including immunosuppressed individuals and healthcare workers (HCW), for influenza vaccination and treatment. How these guidelines have impacted HCW and their patients, particularly those infected with HIV, remains unknown. METHODS: We aimed to describe the knowledge, attitudes and practices regarding influenza and the vaccine among South African HCW...
2017: PloS One
https://www.readbyqxmd.com/read/28296286/nanomedicine-approaches-to-improve-cancer-immunotherapy
#7
REVIEW
Hui Qiu, Yuanzeng Min, Zach Rodgers, Longzhen Zhang, Andrew Z Wang
Significant advances have been made in the field of cancer immunotherapy by orchestrating the body's immune system to eradicate cancer cells. However, safety and efficacy concerns stemming from the systemic delivery of immunomodulatory compounds limits cancer immunotherapies expansion and application. In this context, nanotechnology presents a number of advantages, such as targeted delivery to immune cells, enhanced clinical outcomes, and reduced adverse events, which may aid in the delivery of cancer vaccines and immunomodulatory agents...
March 10, 2017: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
https://www.readbyqxmd.com/read/28294048/computer-aided-structure-based-drug-design-approaches-for-the-discovery-of-new-anti-chikv-agents
#8
Surender Singh Jadav, Barij Nayan Sinha, Rolf Hilgenfeld, Venkatesan Jayaprakash
BACKGROUND: Chikungunya is a viral infection caused by Chikungunya virus (CHIKV), an arbovirus transmitted through mosquito (Aedes aegypti and Aedes albopictus) bite. The virus from sylvatic cycle in Africa mutated to new vector adaptation and became one of the major emerging and re-emerging viral infections in the past decade, affecting more than 40 countries. Efforts are being made by many researches to develop means to prevent and control the infection through vaccines and vector control strategy...
March 9, 2017: Current Computer-aided Drug Design
https://www.readbyqxmd.com/read/28288861/biotechnology-approaches-to-produce-potent-self-adjuvanting-antigen-adjuvant-fusion-protein-subunit-vaccines
#9
REVIEW
Peter Michael Moyle
Traditional vaccination approaches (e.g. live attenuated or killed microorganisms) are among the most effective means to prevent the spread of infectious diseases. These approaches, nevertheless, have failed to yield successful vaccines against many important pathogens. To overcome this problem, methods have been developed to identify microbial components, against which protective immune responses can be elicited. Subunit antigens identified by these approaches enable the production of defined vaccines, with improved safety profiles...
March 11, 2017: Biotechnology Advances
https://www.readbyqxmd.com/read/28287517/microrna-based-regulation-of-picornavirus-tropism
#10
Autumn J Ruiz, Stephen J Russell
Cell-specific restriction of viral replication without concomitant attenuation can benefit vaccine development, gene therapy, oncolytic virotherapy, and understanding the biological properties of viruses. There are several mechanisms for regulating viral tropism, however they tend to be virus class specific and many result in virus attenuation. Additionally, many viruses, including picornaviruses, exhibit size constraints that do not allow for incorporation of large amounts of foreign genetic material required for some targeting methods...
February 6, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28282446/antigenic-and-immunosuppressive-properties-of-a-trimeric-recombinant-transmembrane-envelope-protein-gp41-of-hiv-1
#11
Michael Mühle, Melissa Lehmann, Kerstin Hoffmann, Daniel Stern, Tobias Kroniger, Werner Luttmann, Joachim Denner
The transmembrane envelope (TM) protein gp41 of the human immunodeficiency virus-1 (HIV-1) plays an important role during virus infection inducing the fusion of the viral and cellular membranes. In addition, there are indications that the TM protein plays a role in the immunopathogenesis leading to the acquired immunodeficiency syndrome (AIDS). Inactivated virus particles and recombinant gp41 have been reported to inhibit lymphocyte proliferation, as well as to alter cytokine release and gene expression. The same was shown for a peptide corresponding to a highly conserved domain of all retroviral TM proteins, the immunosuppressive domain...
2017: PloS One
https://www.readbyqxmd.com/read/28277098/barriers-and-motivations-to-volunteers-participation-in-preventive-vaccine-trials-a-systematic-review
#12
M Detoc, A Gagneux-Brunon, F Lucht, E Botelho-Nevers
The recruitment of volunteers in preventive vaccine trials (PVT) is a challenge, since vaccine hesitancy and debates on vaccines are combined to usual difficulties of enrollment in clinical trials. Areas covered: Current knowledge of the reasons leading to the volunteers' participation or non-participation in PVT mainly focuses on data from preventive HIV vaccine trials. A systematic PubMed search was conducted using PRISMA guidelines to identify articles or reviews that reported barriers and motivations to participation in PVT regardless of the targeted disease or population...
March 1, 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/28275462/highlights-from-the-third-biennial-strategies-for-an-hiv-cure-meeting-14-16-november-2016-bethesda-md-usa
#13
EDITORIAL
Diane Lawrence, Lillian Kuo, Elizabeth Church, Betty Poon, Stephen Smiley, Brigitte Sanders-Beer, Liza Dawson, Karl Salzwedel
Since the first Strategies for an HIV Cure Meeting organised by the National Institute of Allergy and Infectious Diseases (NIAID) in 2012, one of the primary purposes of the meeting has been to facilitate communication and foster collaboration across the NIAID-funded Martin Delaney Collaboratories for HIV cure research (MDC), the broader HIV cure-related research field, and industry and community stakeholders. This year's meeting agenda reflected NIAID's increasing investment over the last 5 years in research to identify strategies for eradicating or achieving long-term remission of HIV infection...
January 1, 2017: Journal of Virus Eradication
https://www.readbyqxmd.com/read/28271746/future-proofing-global-health-governance-of-priorities
#14
Belinda Bennett, I Glenn Cohen, Sara E Davies, Lawrence O Gostin, Peter S Hill, Aditi Mankad, Alexandra L Phelan
The year 2015 was a significant anniversary for global health: 15 years since the adoption of the Millennium Development Goals and the creation of the Global Alliance for Vaccines and Immunization, followed two years later by the Global Fund to Fight AIDS, TB and Malaria. 2015 was also the 10-year anniversary of the adoption of the International Health Regulations (May 2005) and the formal entering into force of the Framework Convention on the Tobacco Control (February 2005). The anniversary of these frameworks and institutions illustrates the growth and contribution of 'global' health diplomacy...
March 8, 2017: Global Public Health
https://www.readbyqxmd.com/read/28250664/potential-of-cannabidiol-for-the-treatment-of-viral-hepatitis
#15
Henry I C Lowe, Ngeh J Toyang, Wayne McLaughlin
Viral hepatitis B (HBV) and hepatitis C (HCV) pose a major health problem globally and if untreated, both viruses lead to severe liver damage resulting in liver cirrhosis and cancer. While HBV has a vaccine, HCV has none at the moment. The risk of drug resistance, combined with the high cost of current therapies, makes it a necessity for cost-effective therapeutics to be discovered and developed. The recent surge in interest in Medical Cannabis has led to interest in evaluating and validating the therapeutic potentials of Cannabis and its metabolites against various diseases including viruses...
January 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/28250536/adapting-nepal-s-polio-eradication-programme
#16
Krishna P Paudel, Lee M Hampton, Santosh Gurung, Rajendra Bohara, Indra K Rai, Sameer Anaokar, Rachel D Swift, Stephen Cochi
PROBLEM: Many countries have weak disease surveillance and immunization systems. The elimination of polio creates an opportunity to use staff and assets from the polio eradication programme to control other vaccine-preventable diseases and improve disease surveillance and immunization systems. APPROACH: In 2003, the active surveillance system of Nepal's polio eradication programme began to report on measles and neonatal tetanus cases. Japanese encephalitis and rubella cases were added to the surveillance system in 2004...
March 1, 2017: Bulletin of the World Health Organization
https://www.readbyqxmd.com/read/28239679/adenovirus-serotype-5-vaccine-vectors-trigger-il-27-dependent-inhibitory-cd4-t-cell-responses-that-impair-cd8-t-cell-function
#17
Rafael A Larocca, Nicholas M Provine, Malika Aid, M Justin Iampietro, Erica N Borducchi, Alexander Badamchi-Zadeh, Peter Abbink, David Ng'ang'a, Christine A Bricault, Eryn Blass, Pablo Penaloza-MacMaster, Kathryn E Stephenson, Dan H Barouch
Adenovirus serotype 5 (Ad5) vaccine vectors elicit robust CD8(+) T cell responses, but these responses typically exhibit a partially exhausted phenotype. However, the immunologic mechanism by which Ad5 vectors induce dysfunctional CD8(+) T cells has not previously been elucidated. Here we demonstrate that, following immunization of B6 mice, Ad5 vectors elicit antigen-specific IL-10(+)CD4(+) T cells with a distinct transcriptional profile in a dose-dependent fashion. In rhesus monkeys, we similarly observed upregulated expression of IL-10 and PD-1 by CD4(+) T cells following Ad5 vaccination...
November 2016: Science Immunology
https://www.readbyqxmd.com/read/28231271/applying-antibody-sensitive-hypervariable-region-1-deleted-hepatitis-c-virus-to-the-study-of-escape-pathways-of-neutralizing-human-monoclonal-antibody-ar5a
#18
Rodrigo Velázquez-Moctezuma, Mansun Law, Jens Bukh, Jannick Prentoe
Hepatitis C virus (HCV) is a major cause of end-stage liver diseases. With 3-4 million new HCV infections yearly, a vaccine is urgently needed. A better understanding of virus escape from neutralizing antibodies and their corresponding epitopes are important for this effort. However, for viral isolates with high antibody resistance, or antibodies with moderate potency, it remains challenging to induce escape mutations in vitro. Here, as proof-of-concept, we used antibody-sensitive HVR1-deleted (ΔHVR1) viruses to generate escape mutants for a human monoclonal antibody, AR5A, targeting a rare cross-genotype conserved epitope...
February 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28223458/mutation-of-the-n-terminal-region-of-chikungunya-virus-capsid-protein-implications-for-vaccine-design
#19
Adam Taylor, Xiang Liu, Ali Zaid, Lucas Y H Goh, Jody Hobson-Peters, Roy A Hall, Andres Merits, Suresh Mahalingam
Mosquito-transmitted chikungunya virus (CHIKV) is an arthritogenic alphavirus of the Togaviridae family responsible for frequent outbreaks of arthritic disease in humans. Capsid protein, a structural protein encoded by the CHIKV RNA genome, is able to translocate to the host cell nucleolus. In encephalitic alphaviruses, nuclear translocation induces host cell transcriptional shutoff; however, the role of capsid protein nucleolar localization in arthritogenic alphaviruses remains unclear. Using recombinant enhanced green fluorescent protein (EGFP)-tagged expression constructs and CHIKV infectious clones, we describe a nucleolar localization sequence (NoLS) in the N-terminal region of capsid protein, previously uncharacterized in CHIKV...
February 21, 2017: MBio
https://www.readbyqxmd.com/read/28222748/identification-of-host-cellular-proteins-that-interact-with-the-m-protein-of-a-highly-pathogenic-porcine-reproductive-and-respiratory-syndrome-virus-vaccine-strain
#20
Qian Wang, Yanwei Li, Hong Dong, Li Wang, Jinmei Peng, Tongqing An, Xufu Yang, Zhijun Tian, Xuehui Cai
BACKGROUND: The highly pathogenic porcine reproductive and respiratory syndrome virus (HP-PRRSV) continues to pose one of the greatest threats to the swine industry. M protein is the most conserved and important structural protein of PRRSV. However, information about the host cellular proteins that interact with M protein remains limited. METHODS: Host cellular proteins that interact with the M protein of HP-PRRSV were immunoprecipitated from MARC-145 cells infected with PRRSV HuN4-F112 using the M monoclonal antibody (mAb)...
February 22, 2017: Virology Journal
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