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Vaccination in HIV

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https://www.readbyqxmd.com/read/29166592/hiv-envelope-glycoform-heterogeneity-and-localized-diversity-govern-the-initiation-and-maturation-of-a-v2-apex-broadly-neutralizing-antibody-lineage
#1
Elise Landais, Ben Murrell, Bryan Briney, Sasha Murrell, Kimmo Rantalainen, Zachary T Berndsen, Alejandra Ramos, Lalinda Wickramasinghe, Melissa Laird Smith, Kemal Eren, Natalia de Val, Mengyu Wu, Audrey Cappelletti, Jeffrey Umotoy, Yolanda Lie, Terri Wrin, Paul Algate, Po-Ying Chan-Hui, Etienne Karita, Andrew B Ward, Ian A Wilson, Dennis R Burton, Davey Smith, Sergei L Kosakovsky Pond, Pascal Poignard
Understanding how broadly neutralizing antibodies (bnAbs) to HIV envelope (Env) develop during natural infection can help guide the rational design of an HIV vaccine. Here, we described a bnAb lineage targeting the Env V2 apex and the Ab-Env co-evolution that led to development of neutralization breadth. The lineage Abs bore an anionic heavy chain complementarity-determining region 3 (CDRH3) of 25 amino acids, among the shortest known for this class of Abs, and achieved breadth with only 10% nucleotide somatic hypermutation and no insertions or deletions...
November 21, 2017: Immunity
https://www.readbyqxmd.com/read/29163468/the-role-of-natural-antibodies-to-cc-chemokine-receptor-5-in-hiv-infection
#2
REVIEW
Assunta Venuti, Claudia Pastori, Lucia Lopalco
The CC chemokine receptor 5 (CCR5) is responsible for immune and inflammatory responses by mediation of chemotactic activity in leukocytes, although it is expressed on different cell types. It has been shown to act as co-receptor for the human and simian immunodeficiency viruses (HIV-1, HIV-2, and SIV). Natural reactive antibodies (Abs) recognizing first loop (ECL1) of CCR5 have been detected in several pools of immunoglobulins from healthy donors and from several cohorts of either HIV-exposed but uninfected subjects (ESN) or HIV-infected individuals who control disease progression (LTNP) as well...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29163465/b-cell-activating-factor-and-the-b-cell-compartment-in-hiv-siv-infection
#3
REVIEW
Gwenoline Borhis, Maria Trovato, Nada Chaoul, Hany M Ibrahim, Yolande Richard
With the goal to design effective HIV vaccines, intensive studies focused on broadly neutralizing antibodies, which arise in a fraction of HIV-infected people. Apart from identifying new vulnerability sites in the viral envelope proteins, these studies have shown that a fraction of these antibodies are produced by self/poly-reactive B-cells. These findings prompted us to revisit the B-cell differentiation and selection process during HIV/SIV infection and to consider B-cells as active players possibly shaping the helper T-cell program within germinal centers (GCs)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29163402/pharmacological-induction-of-heme-oxygenase-1-impairs-nuclear-accumulation-of-herpes-simplex-virus-capsids-upon-infection
#4
Francisco J Ibáñez, Mónica A Farías, Angello Retamal-Díaz, Janyra A Espinoza, Alexis M Kalergis, Pablo A González
Heme oxygenase-1 (HO-1) is an inducible enzyme that is expressed in response to physical and chemical stresses, such as ultraviolet radiation, hyperthermia, hypoxia, reactive oxygen species (ROS), as well as cytokines, among others. Its activity can be positively modulated by cobalt protoporphyrin (CoPP) and negatively by tin protoporphirin (SnPP). Once induced, HO-1 degrades iron-containing heme into ferrous iron (Fe(2+)), carbon monoxide (CO) and biliverdin. Importantly, numerous products of HO-1 are cytoprotective with anti-apoptotic, anti-oxidant, anti-inflammatory, and anti-cancer effects...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29162935/hepatitis-e-virus-advances-and-challenges
#5
REVIEW
Ila Nimgaonkar, Qiang Ding, Robert E Schwartz, Alexander Ploss
At least 20 million hepatitis E virus (HEV) infections occur annually, with >3 million symptomatic cases and ∼60,000 fatalities. Hepatitis E is generally self-limiting, with a case fatality rate of 0.5-3% in young adults. However, it can cause up to 30% mortality in pregnant women in the third trimester and can become chronic in immunocompromised individuals, such as those receiving organ transplants or chemotherapy and individuals with HIV infection. HEV is transmitted primarily via the faecal-oral route and was previously thought to be a public health concern only in developing countries...
November 22, 2017: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/29162799/structure-based-design-of-native-like-hiv-1-envelope-trimers-to-silence-non-neutralizing-epitopes-and-eliminate-cd4-binding
#6
Daniel W Kulp, Jon M Steichen, Matthias Pauthner, Xiaozhen Hu, Torben Schiffner, Alessia Liguori, Christopher A Cottrell, Colin Havenar-Daughton, Gabriel Ozorowski, Erik Georgeson, Oleksandr Kalyuzhniy, Jordan R Willis, Michael Kubitz, Yumiko Adachi, Samantha M Reiss, Mia Shin, Natalia de Val, Andrew B Ward, Shane Crotty, Dennis R Burton, William R Schief
Elicitation of broadly neutralizing antibodies (bnAbs) is a primary HIV vaccine goal. Native-like trimers mimicking virion-associated spikes present nearly all bnAb epitopes and are therefore promising vaccine antigens. However, first generation native-like trimers expose epitopes for non-neutralizing antibodies (non-nAbs), which may hinder bnAb induction. We here employ computational and structure-guided design to develop improved native-like trimers that reduce exposure of non-nAb epitopes in the V3-loop and trimer base, minimize both CD4 reactivity and CD4-induced non-nAb epitope exposure, and increase thermal stability while maintaining bnAb antigenicity...
November 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/29159414/hepatitis-b-vaccination-screening-and-linkage-to-care-best-practice-advice-from-the-american-college-of-physicians-and-the-centers-for-disease-control-and-prevention
#7
Winston E Abara, Amir Qaseem, Sarah Schillie, Brian J McMahon, Aaron M Harris
Background: Vaccination, screening, and linkage to care can reduce the burden of chronic hepatitis B virus (HBV) infection. However, recommendations vary among organizations, and their implementation has been suboptimal. The American College of Physicians' High Value Care Task Force and the Centers for Disease Control and Prevention developed this article to present best practice statements for hepatitis B vaccination, screening, and linkage to care. Methods: A narrative literature review of clinical guidelines, systematic reviews, randomized trials, and intervention studies on hepatitis B vaccination, screening, and linkage to care published between January 2005 and June 2017 was conducted...
November 21, 2017: Annals of Internal Medicine
https://www.readbyqxmd.com/read/29159260/public-health-approach-to-prevent-cervical-cancer-in-hiv-infected-women-in-kenya-issues-to-consider-in-the-design-of-prevention-programs
#8
REVIEW
Sonia Menon, Rodolfo Rossi, Stacy G Harmon, Hillary Mabeya, Steven Callens
Women living with HIV in Africa are at increased risk to be co-infected with Human Papilloma Virus (HPV), persistent high risk (HR) HPV infection and bacterial vaginosis (BV), which compounds HPV persistence, thereby increasing the risk for cervical dysplasia. New guidance from WHO in 2014 advocating for a "screen and treat" approach in resource poor settings is becoming a more widely recommended screening tool for cervical cancer prevention programs in such contexts. This review article summarizes the risk factors to be considered when designing a primary and secondary cervical prevention program in a post-vaccination era for HIV-infected women in Kenya...
November 2017: Gynecologic Oncology Reports
https://www.readbyqxmd.com/read/29158102/human-papillomavirus-types-from-infection-to-cancer-in-the-anus-according-to-sex-and-hiv-status-a-systematic-review-and-meta-analysis
#9
Chunqing Lin, Silvia Franceschi, Gary M Clifford
BACKGROUND: Data on carcinogenicity of human papillomavirus (HPV) types in the anus are needed to inform anal cancer prevention through vaccination and screening. This is particularly the case for people infected with HIV, who are at an increased risk of anal cancer. METHODS: We did a systematic review of studies published from January, 1986, to July, 2017, in MEDLINE, Embase, and the Cochrane Library on anal HPV infection, without any language restrictions. Eligible studies reported type-specific HPV prevalence by strata of cytopathological or histopathological anal diagnosis, sex, and HIV status...
November 17, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/29157976/loading-dendritic-cells-with-gold-nanoparticles-gnps-bearing-hiv-peptides-and-mannosides-enhance-hiv-specific-t-cell-responses
#10
Núria Climent, Isabel García, Marco Marradi, Fabrizio Chiodo, Laia Miralles, María José Maleno, José María Gatell, Felipe García, Soledad Penadés, Montserrat Plana
Gold nanoparticles (GNPs) decorated with glycans ameliorate dendritic cells (DC) uptake, antigen-presentation and T-cells cross-talk, which are important aspects in vaccine design. GNPs allow for high antigen loading, DC targeting, lack of toxicity and are straightforward prepared and easy to handle. The present study aimed to assess the capacity of DC to process and present HIV-1-peptides loaded onto GNPs bearing high-mannoside-type oligosaccharides (P1@HM) to autologous T-cells from HIV-1 patients. The results showed that P1@HM increased HIV-specific CD4(+) and CD8(+) T-cell proliferation and induced highly functional cytokine secretion compared with HIV-peptides alone...
November 17, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/29155877/immune-response-profiles-of-calves-following-vaccination-with-live-bcg-and-inactivated-mycobacterium-bovis-vaccine-candidates
#11
E M D L van der Heijden, J Chileshe, J C M Vernooij, C Gortazar, R A Juste, I Sevilla, J E Crafford, V P M G Rutten, A L Michel
Conventional control and eradication strategies for bovine tuberculosis (BTB) face tremendous difficulties in developing countries; countries with wildlife reservoirs, a complex wildlife-livestock-human interface or a lack of veterinary and veterinary public health surveillance. Vaccination of cattle and other species might in some cases provide the only suitable control strategy for BTB, while in others it may supplement existing test-and-slaughter schemes. However, the use of live BCG has several limitations and the global rise of HIV/AIDS infections has furthermore warranted the exploration of inactivated vaccine preparations...
2017: PloS One
https://www.readbyqxmd.com/read/29154044/modulating-host-immune-responses-to-fight-invasive-fungal-infections
#12
REVIEW
James E Scriven, Mark W Tenforde, Stuart M Levitz, Joseph N Jarvis
Modulation of host immunity in invasive fungal infection is an appealing but as yet mostly elusive treatment strategy. Animal studies in invasive candidiasis and aspergillosis have demonstrated beneficial effects of colony stimulating factors, interferon-gamma and monoclonal antibodies. More recent studies transfusing leukocytes pre-loaded with lipophilic anti-fungal drugs, or modulated T-cells, along with novel vaccination strategies show great promise. The translation of immune therapies into clinical studies has been limited to date but this is changing and the results of new Candida vaccine trials are eagerly awaited...
November 15, 2017: Current Opinion in Microbiology
https://www.readbyqxmd.com/read/29152727/human-papillomavirus-associated-cutaneous-disease-burden-in-human-immunodeficiency-virus-hiv-positive-patients-the-role-of-human-papillomavirus-vaccination-and-a-review-of-the-literature
#13
REVIEW
Lindsay C Bacik, Catherine Chung
Human papillomavirus (HPV) infection is related to the development of cutaneous squamous cell carcinoma, oropharyngeal carcinoma, and anogenital malignancies. Patients infected with human immunodeficiency virus (HIV) have impaired cell-mediated immunity, placing them at risk for more prolonged infection with a greater likelihood of disease expression. This presents important implications for screening and treatment of HPV in the HIV patient population. The use of prophylactic vaccines directed against HPV has been a promising clinical development, though the immunogenicity of these vaccines in the immunocompromised host and in patients with previously established HPV infections has not been well established...
November 20, 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/29152266/vaccine-associated-measles-in-an-immunocompetent-child
#14
Shawn B Sood, Krishna Suthar, Kimberly Martin, Keith Mather
We present a rare case of vaccine-associated measles infection in an immunocompetent, HIV-negative patient in the United States. This case depicts the impressive rash our patient manifested and highlights the importance of reviewing public health interventions to determine epidemiological links in geographical areas with low incidence of measles.
November 2017: Clinical Case Reports
https://www.readbyqxmd.com/read/29149907/mapping-evidence-on-the-distribution-of-human-papillomavirus-related-cancers-in-sub-saharan-africa-scoping-review-protocol
#15
Bridget K M Lekoane, Tivani P Mashamba-Thompson, Themba G Ginindza
BACKGROUND: Despite the introduction of HPV vaccines, the incidence of HPV-related cancers (cervical, penile, anal, vulvar, vagina, head, and neck) in sub-Saharan Africa has been rising. The increasing incidence of these HPV-related cancers has been attributed to changes in lifestyle-related risk factors, most notably sexual behavior. The main objective of this study is to map evidence on the distribution of HIV-related cancers in sub-Saharan Africa (SSA). METHODS AND ANALYSIS: We will conduct a scoping review to explore, describe, and map literature on the distribution of HPV-related cancers in sub-Saharan Africa...
November 17, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/29149197/sieve-analysis-of-breakthrough-hiv-1-sequences-in-hvtn-505-identifies-vaccine-pressure-targeting-the-cd4-binding-site-of-env-gp120
#16
Allan C deCamp, Morgane Rolland, Paul T Edlefsen, Eric Sanders-Buell, Breana Hall, Craig A Magaret, Andrew J Fiore-Gartland, Michal Juraska, Lindsay N Carpp, Shelly T Karuna, Meera Bose, Steven LePore, Shana Miller, Annemarie O'Sullivan, Kultida Poltavee, Hongjun Bai, Kalpana Dommaraju, Hong Zhao, Kim Wong, Lennie Chen, Hasan Ahmed, Derrick Goodman, Matthew Z Tay, Raphael Gottardo, Richard A Koup, Robert Bailer, John R Mascola, Barney S Graham, Mario Roederer, Robert J O'Connell, Nelson L Michael, Merlin L Robb, Elizabeth Adams, Patricia D'Souza, James Kublin, Lawrence Corey, Daniel E Geraghty, Nicole Frahm, Georgia D Tomaras, M Juliana McElrath, Lisa Frenkel, Sheila Styrchak, Sodsai Tovanabutra, Magdalena E Sobieszczyk, Scott M Hammer, Jerome H Kim, James I Mullins, Peter B Gilbert
Although the HVTN 505 DNA/recombinant adenovirus type 5 vector HIV-1 vaccine trial showed no overall efficacy, analysis of breakthrough HIV-1 sequences in participants can help determine whether vaccine-induced immune responses impacted viruses that caused infection. We analyzed 480 HIV-1 genomes sampled from 27 vaccine and 20 placebo recipients and found that intra-host HIV-1 diversity was significantly lower in vaccine recipients (P ≤ 0.04, Q-values ≤ 0.09) in Gag, Pol, Vif and envelope glycoprotein gp120 (Env-gp120)...
2017: PloS One
https://www.readbyqxmd.com/read/29145733/harnessing-novel-imaging-approaches-to-guide-hiv-prevention-and-cure-discoveries-a-national-institutes-of-health-and-global-hiv-vaccine-enterprise-2017-meeting-report
#17
Brigitte Elisabeth Sanders-Beer, Yegor Voronin, David McDonald, Anjali Singh
Advances in imaging technologies have greatly increased our understanding of cellular and molecular interactions in humans and their corresponding animal models of infectious diseases. In the HIV/SIV field, imaging has provided key insights into mucosal viral transmission, local and systemic virus spread, host-virus dynamics, and chronic inflammation/immune activation and the resultant immunopathology. Recent developments in imaging applications are yielding physical, spatial, and temporal measurements to enhance insight into biological functions and disease processes, while retaining important cellular, microenvironmental, organ and intact organism contextual details...
November 16, 2017: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/29145268/seroconverting-nonresponder-of-high-dose-intramuscular-hbv-vaccine-with-intradermal-hbv-vaccine-a-case-report
#18
Manjusha Das, Vishwas Vanar, Daniel K Martin, Saqib Walayat, Jaymon Patel, Maaz B Badshah, Nikhil R Kalva, Watcoun-Nchinda Pisoh, Sonu Dhillon
INTRODUCTION: Liver disease is a leading cause of death among human immunodeficiency virus (HIV)-infected patients in the United States. Patients with HIV and hepatitis B virus (HBV) coinfection have accelerated liver disease, higher rates of cirrhosis, and liver cancer, and markedly increased liver-related mortality. The CDC and US Advisory Committee on Immunization Practices recommend hepatitis B vaccination for all HIV-infected individuals. Unfortunately, HIV-infected patients have a worse response rate after standard HBV vaccination...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29142124/truncating-the-gp41-cytoplasmic-tail-of-siv-decreases-sensitivity-to-neutralizing-antibodies-without-increasing-envelope-content-of-virions
#19
Ellen White, Fan Wu, Elena Chertova, Julian Bess, James D Roser, Jeffrey D Lifson, Vanessa M Hirsch
An incomplete understanding of native HIV and SIV envelope glycoprotein (Env) impedes the development of structural models of Env and vaccine design. This shortcoming is due in part to the low number of Env trimers on virus particles. For SIV, this low expression can be counteracted by truncating the cytoplasmic tail (CT) of Env. CT truncation has been shown to increase Env incorporation into the virion and is commonly used in vaccine and imaging studies, but its effects on viral antigenicity have not been fully elucidated...
November 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29141014/prevalence-and-risk-factors-of-anal-human-papillomavirus-infection-among-hiv-negative-men-who-have-sex-with-men-in-urumqi-city-of-xinjiang-uyghur-autonomous-region-china
#20
Tian Tian, Peierdun Mijiti, Huang Bingxue, Zhang Fadong, Abidan Ainiwaer, Sang Guoyao, Zhang Zhanlin, Yeledan Mahan, Tuo Xiaoqin, Gong Zheng, Dai Jianghong
BACKGROUND: Infection with human papillomavirus (HPV) is the most common sexually transmitted infection among men who have sex with men (MSM). Study on prevalence and risk factors of anal HPV infection among HIV-negative MSM in Northwestern China was rare. METHODS: We performed a cross-sectional study of HPV prevalence using anal swab specimens among HIV-negative MSM in Urumqi city of Xinjiang Uyghur Autonomous Region, China between April 1st and October 30th in 2016...
2017: PloS One
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