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Vaccination in HIV

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https://www.readbyqxmd.com/read/29352633/current-concerns-and-perspectives-on-zika-virus-co-infection-with-arboviruses-and-hiv
#1
REVIEW
Hussin A Rothan, Mehdi R M Bidokhti, Siddappa N Byrareddy
Dissemination of vector-borne viruses, such as Zika virus (ZIKV), in tropical and sub-tropical regions has a complicated impact on the immunopathogenesis of other endemic viruses such as dengue virus (DENV), chikungunya virus (CHIKV) and human immunodeficiency virus (HIV). The consequences of the possible co-infections with these viruses have specifically shown significant impact on the treatment and vaccination strategies. ZIKV is a mosquito-borne flavivirus from African and Asian lineages that causes neurological complications in infected humans...
January 16, 2018: Journal of Autoimmunity
https://www.readbyqxmd.com/read/29351639/call-to-action-prevention-of-mother-to-child-transmission-of-hepatitis-b-in-africa
#2
Peyton Wilson, Jonathan B Parr, Ravi Jhaveri, Steve R Meshnick
Hepatitis B virus (HBV) is a significant public health issue that has not been adequately addressed, especially in the high-prevalence region of Africa. Despite the incorporation of HBV vaccines into the Expanded Program on Immunization (EPI), children continue to be infected with HBV through maternal-to-child transmission (MTCT). The addition of a birth dose of HBV vaccine would be a cost-effective method to reduce MTCT. Birth-dose HBV vaccine policies have been adopted in the Western Pacific region but have yet to be implemented in the African region...
January 17, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29350181/a-single-continuous-metric-to-define-tiered-serum-neutralization-potency-against-hiv
#3
Peter Hraber, Bette Korber, Kshitij Wagh, David Montefiori, Mario Roederer
HIV-1 Envelope (Env) variants are grouped into tiers by their neutralization-sensitivity phenotype. This helped to recognize that tier-1 neutralization responses can be elicited readily, but do not protect against new infections. Tier-3 viruses are the least sensitive to neutralization. Because most circulating viruses are tier 2, vaccines that elicit neutralization responses against them are needed. While tier classification is widely used for viruses, a way to rate serum or antibody neutralization responses in comparable terms is needed...
January 19, 2018: ELife
https://www.readbyqxmd.com/read/29344211/prevalence-of-hpv-infection-among-hiv-positive-and-hiv-negative-women-in-central-eastern-italy-strategies-of-prevention
#4
Edoardo Tartaglia, Katia Falasca, Jacopo Vecchiet, Giovanna Paola Sabusco, Giovanna Picciano, Roberto Di Marco, Claudio Ucciferri
The present cross-sectional-study aimed to determine the prevalence of human papillomavirus (HPV)-genotypes among human immunodeficiency virus (HIV)-positive and -negative women in Central/Eastern Italy, and to identify the optimal strategies for effective HPV-prevention in each group. A representative sample of HIV-negative (150/200) and -positive (50/200) women, who underwent cervico-vaginal-swabbing. Swabs were analysed for a cytological screening and for a HPV-DNA-genotyping-test. A total of 66/200 swabs resulted HPV-positive...
December 2017: Oncology Letters
https://www.readbyqxmd.com/read/29343576/increased-epitope-complexity-correlated-with-antibody-affinity-maturation-and-a-novel-binding-mode-revealed-by-structures-of-rabbit-antibodies-against-the-third-variable-loop-v3-of-hiv-1-gp120
#5
Ruimin Pan, Yali Qin, Marisa Banasik, William Lees, Adrian J Shepherd, Michael W Cho, Xiang-Peng Kong
The V3 loop of HIV-1 gp120 is an immunodominant region targeted by neutralizing antibodies (nAbs). Despite limited breadth, better characterization of the structural details of the interactions between these nAbs and their target epitopes would enhance our understanding of the mechanism of neutralization and facilitate designing better immunogens to induce nAbs with greater breadth. Recently, we isolated two anti-V3 neutralizing monoclonal antibodies (mAbs), 10A3 and 10A37, from a rabbit immunized with gp120 of the M group consensus sequence...
January 17, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29343432/hiv-immunogens-affinity-is-key
#6
Savit Prabhu, Ian A Cockburn, Carola G Vinuesa
Generation of broadly neutralizing antibodies is a key aim of HIV vaccine design, but the precursor B cells are rare. Abbott et al. (2018) report that high affinity and avidity immunogens are required to promote maturation of low frequency B cells in germinal centers.
January 16, 2018: Immunity
https://www.readbyqxmd.com/read/29329113/therapeutic-hiv-1-vaccine-time-for-immunomodulation-and-combinatorial-strategies
#7
Nabila Seddiki, Yves Lévy
PURPOSE OF REVIEW: The purpose is to recall some of the key immunological elements that are at the crossroad and need to be combined for developing a potent therapeutic HIV-1 vaccine. RECENT FINDINGS: Therapeutic vaccines and cytokines have been commonly used to enhance and/or recall preexisting HIV-1 specific cell-mediated immune responses aiming to suppress virus replication. While the vaccine is important to stimulate HIV-1 specific T-cell responses, the cytokine may support the expansion of the stimulated virus-specific T cells...
January 10, 2018: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/29328508/serologic-responses-and-effectiveness-of-hepatitis-a-vaccination-among-hiv-positive-individuals-during-the-outbreak-of-acute-hepatitis-a
#8
Kuan-Yin Lin, Szu-Min Hsieh, Hsin-Yun Sun, Yi-Chun Lo, Wang-Huei Sheng, Yu-Chung Chuang, Aristine Cheng, Sung-Ching Pan, Guan-Jhou Chen, Chien-Ching Hung, Shan-Chwen Chang
Outbreaks of hepatitis A virus (HAV) infection have been occurring among men who have sex with men (MSM) in Asia-Pacific region, the United States, and several European countries since June 2015, and recently among persons who are homeless and use illicit drugs in the US. We evaluated the serologic responses and effectiveness of HAV vaccination in HIV-positive individuals during the outbreak in Taiwan. From June 1, 2015 to September 30, 2016, anti-HAV IgG was prospectively determined among all HIV-positive individuals...
January 12, 2018: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/29326373/hepatitis-a-infections-in-men-who-have-sex-with-men-using-hiv-prep-in-paris
#9
Pauline Penot, Marie-Alice Colombier, Sarah Maylin, Jean-Michel Molina
The current hepatitis A outbreak in Europe is largely involving men having sex with multiple male partners. The objective of the present report was to warn teams dealing against the persistent risk of viral and bacterial sexually transmitted infection (STIs) in patients receiving HIV pre-exposure prophylaxis (PrEP). We have notified and investigated three cases of acute hepatitis A virus (HAV) infection in people receiving HIV PrEP in our clinic between December 2016 and March 2017. The patients were not epidemiologically related, had no recent travel history to HAV endemic areas, reported multiple STIs during this period and had not been vaccinated against HAV...
January 11, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29326178/impact-of-replacing-cytology-with-human-papillomavirus-testing-for-cervical-cancer-screening-on-the-prevalence-of-trichomonas-vaginalis-a-modelling-study
#10
Ben B Hui, Caitlin P Reulein, Rebecca J Guy, Basil Donovan, Jane S Hocking, Matthew G Law, David G Regan
OBJECTIVES: Trichomonas vaginalis (TV) is the most common curable STI worldwide and is associated with increased risk of HIV acquisition and serious reproductive morbidities. The prevalence of TV infection is very low in Australian cities, and this is thought to be at least partly due to incidental detection and treatment of TV in women participating in the cervical cytology screening programme. In 2017, the national cervical screening programme will transition to a new model based on testing for high-risk (HR) human papillomavirus (HPV), with a reduced frequency and commencement at an older age...
January 11, 2018: Sexually Transmitted Infections
https://www.readbyqxmd.com/read/29325425/meningitis-vaccination-knowledge-and-awareness-among-ymsm-in-chicago
#11
Gregory Phillips, Amy K Johnson, Christian N Adames, Brian Mustanski
Serogroup C invasive meningococcal disease (IMD) outbreaks in men who have sex with men (MSM) have been occurring with greater frequency in urban areas across the United States. An effective vaccine for IMD is available and is recommended for MSM in outbreak settings. Particular subgroups of MSM have been disproportionately represented in outbreaks, specifically young, Black, and HIV-positive MSM. As little is known about the knowledge, awareness, and vaccination status of young MSM, we sought to describe this and explore racial/ethnic differences...
January 1, 2018: Health Education & Behavior: the Official Publication of the Society for Public Health Education
https://www.readbyqxmd.com/read/29325070/vaccine-induced-antibody-responses-modify-the-association-between-t-cell-immune-responses-and-hiv-1-infection-risk-in-hvtn-505
#12
Youyi Fong, Xiaoying Shen, Vicki C Ashley, Aaron Deal, Kelly E Seaton, Chenchen Yu, Shannon P Grant, Guido Ferrari, Allan C deCamp, Robert T Bailer, Richard A Koup, David Montefiori, Barton F Haynes, Marcella Sarzotti-Kelsoe, Barney S Graham, Lindsay N Carpp, Scott M Hammer, Magda Sobieszczyk, Shelly Karuna, Edith Swann, Edwin DeJesus, Mark Mulligan, Ian Frank, Susan Buchbinder, Richard M Novak, M Juliana McElrath, Spyros Kalams, Michael Keefer, Nicole A Frahm, Holly E Janes, Peter B Gilbert, Georgia D Tomaras
Background: HVTN 505 was an HIV-1 preventive vaccine efficacy trial of a DNA/recombinant adenovirus serotype 5 (rAd5) vaccine regimen. We assessed antibody responses measured one month post-final vaccination (Month 7) as correlates of HIV-1 acquisition risk. Methods: Binding antibody responses were quantified in serum samples from 25 primary endpoint vaccine cases (diagnosed with HIV-1 infection between Month 7 and 24) and 125 randomly sampled frequency-matched vaccine controls (HIV-1 negative at Month 24)...
January 8, 2018: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/29323175/functional-antibody-response-against-v1v2-and-v3-of-hiv-gp120-in-the-vax003-and-vax004-vaccine-trials
#13
Preetha Balasubramanian, Constance Williams, Mariya B Shapiro, Faruk Sinangil, Keith Higgins, Arthur Nádas, Maxim Totrov, Xiang-Peng Kong, Andrew J Fiore-Gartland, Nancy L Haigwood, Susan Zolla-Pazner, Catarina E Hioe
Immunization with HIV AIDSVAX gp120 vaccines in the phase III VAX003 and VAX004 trials did not confer protection. To understand the shortcomings in antibody (Ab) responses induced by these vaccines, we evaluated the kinetics of Ab responses to the V1V2 and V3 regions of gp120 and the induction of Ab-mediated antiviral functions during the course of 7 vaccinations over a 30.5-month period. Plasma samples from VAX003 and VAX004 vaccinees and placebo recipients were measured for ELISA-binding Abs and for virus neutralization, Ab-dependent cellular phagocytosis (ADCP), and Ab-dependent cellular cytotoxicity (ADCC)...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29322922/analysis-of-viral-diversity-for-vaccine-target-discovery
#14
Asif M Khan, Yongli Hu, Olivo Miotto, Natascha M Thevasagayam, Rashmi Sukumaran, Hadia Syahirah Abd Raman, Vladimir Brusic, Tin Wee Tan, J Thomas August
BACKGROUND: Viral vaccine target discovery requires understanding the diversity of both the virus and the human immune system. The readily available and rapidly growing pool of viral sequence data in the public domain enable the identification and characterization of immune targets relevant to adaptive immunity. A systematic bioinformatics approach is necessary to facilitate the analysis of such large datasets for selection of potential candidate vaccine targets. RESULTS: This work describes a computational methodology to achieve this analysis, with data of dengue, West Nile, hepatitis A, HIV-1, and influenza A viruses as examples...
December 21, 2017: BMC Medical Genomics
https://www.readbyqxmd.com/read/29321320/hiv-1-specific-iga-monoclonal-antibodies-from-an-hiv-1-vaccinee-mediate-galcer-blocking-and-phagocytosis
#15
Saintedym Wills, Kwan-Ki Hwang, Pinghuang Liu, S Moses Dennison, Matthew Zirui Tay, Xiaoying Shen, Justin Pollara, Judith T Lucas, Robert Parks, Supachai Rerks-Ngarm, Punnee Pitisuttithum, Sorachai Nitayapan, Jaranit Kaewkungwal, Rasmi Thomas, Jerome H Kim, Nelson L Michael, Merlin L Robb, Mike McRaven, David C Montefiori, Thomas J Hope, Hua-Xin Liao, M Anthony Moody, Guido Ferrari, Barton F Haynes, S Munir Alam, Mattia Bonsignori, Georgia D Tomaras
Vaccine-elicited humoral immune responses comprise an array of antibody forms and specificities with only a fraction contributing to protective host immunity. Elucidation of antibody effector functions responsible for protective immunity against HIV-1 acquisition is a major goal for the HIV-1 vaccine field. Immunoglobulin A (IgA) is an important part of the host defense against pathogens; however, little is known about the role of vaccine-elicited IgA and their capacity to mediate antiviral functions. To identify the antiviral functions of HIV-1-specific IgA elicited by vaccination, we cloned HIV-1 envelope specific IgA monoclonal antibodies by memory B cell cultures from peripheral blood mononuclear cells from an RV144 vaccinee and produced two IgA clonal cell lines (HG129 and HG130) producing native, non-recombinant IgA monoclonal antibodies (mAbs)...
January 10, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29320464/sti-knowledge-in-berlin-adolescents
#16
Frederik Tilmann von Rosen, Antonella Juline von Rosen, Falk Müller-Riemenschneider, Inken Damberg, Peter Tinnemann
Sexually transmitted infections (STIs) pose a significant threat to individual and public health. They disproportionately affect adolescents and young adults. In a cross-sectional study, we assessed self-rated and factual STI knowledge in a sample of 9th graders in 13 secondary schools in Berlin, Germany. Differences by age, gender, migrant background, and school type were quantified using bivariate and multivariable analyses. A total of 1177 students in 61 classes participated. The mean age was 14.6 (SD = 0...
January 10, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29317556/hepatitis-b-vaccination-strategy-in-hiv-infected-children
#17
Pooja Dewan, Piyush Gupta
No abstract text is available yet for this article.
December 15, 2017: Indian Pediatrics
https://www.readbyqxmd.com/read/29315111/the-growing-epidemic-of-sexually-transmitted-infections-in-adolescents-a-neglected-population
#18
Chelsea L Shannon, Jeffrey D Klausner
PURPOSE OF REVIEW: Sexually transmitted infection (STI) incidence is on the rise in the United States. The increase is especially pronounced in adolescents (15-24 years of age). Despite making up only a quarter of the population, adolescents account for approximately half of new STIs in the United States every year. This review summarizes recent developments in the field of STIs, excluding HIV, in adolescents. RECENT FINDINGS: In this review, we examine the epidemiology, screening, management, and prevention of STIs in adolescents...
February 2018: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/29315059/multi-envelope-hiv-1-vaccine-development-two-targeted-immune-pathways-one-desired-protective-outcome
#19
Julia L Hurwitz, Mattia Bonsignori
In 2016, there were more than 30 million individuals living with HIV-1, ∼1.8 million new HIV-1 infections, and ∼1 million HIV-1-related deaths according to UNAIDS ( unaids.org ). Hence, a preventive HIV-1 vaccine remains a global priority. The variant envelopes of HIV-1 present a significant obstacle to vaccine development and the vaccine field has realized that immunization with a single HIV-1 envelope protein will not be sufficient to generate broadly neutralizing antibodies. Here we describe two nonmutually exclusive, targeted pathways with which a multi-envelope HIV-1 vaccine may generate protective immune responses against variant HIV-1...
January 9, 2018: Viral Immunology
https://www.readbyqxmd.com/read/29313682/programmable-nucleic-acid-nanoswitches-for-the-rapid-single-step-detection-of-antibodies-in-bodily-fluids
#20
Alessandro Porchetta, Rudy Ippodrino, Bruna Marini, Arnaldo Caruso, Francesca Caccuri, Francesco Ricci
Antibody detection plays a pivotal role in the diagnosis of pathogens and monitoring the success of vaccine immunization. However, current serology techniques require multiple, time-consuming washing and incubation steps, which limit their applicability in point-of-care (POC) diagnostics and high-throughput assays. We developed here a nucleic acid nanoswitch platform able to instantaneously measure immunoglobulins of type G and E (IgG and IgE) levels directly in blood serum and other bodily fluids. The system couples the advantages of target-binding induced colocalization and nucleic acid conformational-change nanoswitches...
January 9, 2018: Journal of the American Chemical Society
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