keyword
MENU ▼
Read by QxMD icon Read
search

HIV neutralizing antibody

keyword
https://www.readbyqxmd.com/read/28222180/pre-existing-neutralizing-antibody-mitigates-b-cell-dysregulation-and-enhances-the-env-specific-antibody-response-in-shiv-infected-rhesus-macaques
#1
Juan Pablo Jaworski, Peter Bryk, Zachary Brower, Bo Zheng, Ann J Hessell, Alexander F Rosenberg, Tong Tong Wu, Ignacio Sanz, Michael C Keefer, Nancy L Haigwood, James J Kobie
Our central hypothesis is that protection against HIV infection will be powerfully influenced by the magnitude and quality of the B cell response. Although sterilizing immunity, mediated by pre-formed abundant and potent antibodies is the ultimate goal for B cell-targeted HIV vaccine strategies, scenarios that fall short of this may still confer beneficial defenses against viremia and disease progression. We evaluated the impact of sub-sterilizing pre-existing neutralizing antibody on the B cell response to SHIV infection...
2017: PloS One
https://www.readbyqxmd.com/read/28213514/peripheral-membrane-interactions-boost-the-engagement-by-an-anti-hiv-1-broadly-neutralizing-antibody
#2
Edurne Rujas, José M M Caaveiro, Sara Insausti, Miguel García-Porras, Kouhei Tsumoto, José L Nieva
The 4E10 antibody displays an extreme breadth of HIV-1 neutralization and therefore constitutes a suitable model system for structure- guided vaccine design and immunotherapeutics against AIDS. In this regard, the relevance of auto- reactivity with membrane lipids for the biological function of this antibody is still a subject of controversy. To address this dispute, herein we have compared the membrane-partitioning ability of the 4E10 antibody and several of its variants, which were mutated at the region of the paratope surface in contact with the membrane-interface...
February 17, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28207491/intrastructural-help-improving-the-hiv-1-envelope-antibody-response-induced-by-virus-like-particle-vaccines
#3
Vladimir Temchura, Klaus Überla
PURPOSE OF REVIEW: The importance of IgG Fc-effector functions for the efficacy of HIV vaccines is increasingly recognized. Although different types of vaccines were shown to induce antibodies with different Fc-activities, there is no clear strategy how to raise antibody responses with a desired pattern of Fc-effector functions. Given the central role of T-helper cells in regulating the germinal center reaction and the differentiation of B cells in an antigen-specific manner, the review will discuss whether T-helper cells directed against non-HIV envelope (Env) antigens could be harnessed to improve the HIV-Env antibody response...
February 14, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28207490/how-hiv-1-entry-mechanism-and-broadly-neutralizing-antibodies-guide-structure-based-vaccine-design
#4
Marie Pancera, Anita Changela, Peter D Kwong
PURPOSE OF REVIEW: An HIV-1 vaccine that elicits broadly neutralizing antibodies (bNAbs) remains to be developed. Here, we review how knowledge of bNAbs and HIV-1 entry mechanism is guiding the structure-based design of vaccine immunogens and immunization regimens. RECENT FINDINGS: Isolation of bNAbs from HIV-1-infected donors has led to an unprecedented understanding of the sites of vulnerability that these antibodies target on the HIV-1 envelope (Env) as well as of the immunological pathways that these antibody lineages follow to develop broad and potent neutralization...
February 15, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28207489/b-cell-abnormalities-and-impact-on-antibody-response-in-hiv-infection
#5
Alessandra Noto, Giuseppe Pantaleo
PURPOSE OF REVIEW: The purpose of the present review is to provide an update on the current development in the field of broadly neutralizing antibodies (bNabs) and their potential use in the prevention and therapeutic settings, and an evaluation of the B-cell abnormalities that may impair antibody responses in HIV infection. RECENT FINDINGS: Major advances have been achieved in the characterization of bNabs directed against different vulnerable regions of HIV Envelope (Env)...
February 15, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28207488/lessons-learned-from-humoral-responses-of-hiv-patients
#6
Laura E McCoy, Áine McKnight
PURPOSE OF REVIEW: Since 2009 many broadly neutralizing antibodies against HIV have been identified, yet there is still no vaccine capable of inducing such antibodies in humans. This review considers the early observations of HIV sera neutralization in light of more recent studies and highlights areas for future research. RECENT FINDINGS: Large clinical cohort studies using standardized neutralization assays and pseudoviruses derived from primary isolates have shown that 10-30% of HIV infections result in some level of serum neutralization breadth...
February 15, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28207487/antibody-mediated-immune-exclusion-of-hiv
#7
Ruth M Ruprecht, Samir K Lakhashe
PURPOSE OF REVIEW: Although approximately 90% of all HIV transmissions in humans occur through mucosal contact, the induction of mucosal anti-HIV immune responses has remained understudied. Here we summarize data demonstrating the powerful protection that is achievable at mucosal frontlines through virus-specific mucosal IgA alone or combined with IgG. RECENT FINDINGS: Passive immunization with different monoclonal antibody subclasses but identical epitope specificity (the conserved V3-loop crown of HIV gp120) has revealed that the dimeric IgA1 (dIgA1) form with its open hinge can prevent simian-human immunodeficiency virus (SHIV) acquisition in rhesus macaques at a higher rate than dIgA2...
February 15, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28207486/particle-based-delivery-of-the-hiv-envelope-protein
#8
Benedikt Asbach, Ralf Wagner
PURPOSE OF REVIEW: A major focus in HIV vaccine research is the development of suitable antigens that elicit broadly neutralizing antibody responses targeting HIV's envelope protein (Env). Delivery of Env in a repetitive manner on particle-based carriers allows higher avidity interactions and is therefore expected to efficiently engage B cells, thus leading to affinity maturation that results in superior antibody responses characterized by improved breadth, potency, and durability. This review summarizes current work that is evaluating diverse types of such particulate carriers for Env delivery...
February 15, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28207485/antigp41-membrane-proximal-external-region-antibodies-and-the-art-of-using-the-membrane-for-neutralization
#9
Nichole Cerutti, Juan Luis Loredo-Varela, Christophe Caillat, Winfried Weissenhorn
PURPOSE OF REVIEW: We summarize the latest research on the progress to understand the neutralizing epitopes present within the membrane proximal external region (MPER) of the HIV-1 fusion protein subunit gp41. RECENT FINDINGS: The HIV-1 fusion protein subunit gp41 contains a highly conserved sequence that is essential for membrane fusion and targeted by broadly neutralizing antibodies such as 2F5, 4E10, Z13e1, and 10E8. These antibodies recognize a linear gp41 epitope with high affinity, but require additional hydrophobic sequences present in their heavy chain CDR3 for neutralization...
February 15, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28203239/sublingual-priming-with-a-hiv-gp41-based-subunit-vaccine-elicits-mucosal-antibodies-and-persistent-b-memory-responses-in-non-human-primates
#10
Selma Bekri, Pierre Bourdely, Carmelo Luci, Nathalie Dereuddre-Bosquet, Bin Su, Frédéric Martinon, Véronique M Braud, Irene Luque, Pedro L Mateo, Sara Crespillo, Francisco Conejero-Lara, Christiane Moog, Roger Le Grand, Fabienne Anjuère
Persistent B cell responses in mucosal tissues are crucial to control infection against sexually transmitted pathogens like human immunodeficiency virus 1 (HIV-1). The genital tract is a major site of infection by HIV. Sublingual (SL) immunization in mice was previously shown to generate HIV-specific B cell immunity that disseminates to the genital tract. We report here the immunogenicity in female cynomolgus macaques of a SL vaccine based on a modified gp41 polypeptide coupled to the cholera toxin B subunit designed to expose hidden epitopes and to improve mucosal retention...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28202762/maternal-binding-and-neutralizing-igg-responses-targeting-the-c-terminal-region-of-the-v3-loop-are-predictive-of-reduced-peripartum-hiv-1-transmission-risk
#11
David R Martinez, Nathan Vandergrift, Ayooluwa O Douglas, Erin McGuire, John Bainbridge, Nathan I Nicely, David C Montefiori, Georgia D Tomaras, Genevieve G Fouda, Sallie R Permar
The development of an effective maternal HIV-1 vaccine that could synergize with antiretroviral therapy (ART) to eliminate pediatric HIV-1 infection will require the characterization of maternal immune responses capable of blocking transmission of autologous HIV viruses to the infant. We previously identified that maternal plasma antibody binding to linear epitopes within the variable loop 3 (V3) region of HIV envelope (Env) and neutralizing responses against easy to neutralize tier 1 viruses were associated with reduced risk of peripartum HIV infection in the historic U...
February 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28202756/a-glycosylation-benchmark-profile-for-hiv-1-envelope-glycoprotein-production-based-on-eleven-env-trimers
#12
Eden P Go, Haitao Ding, Shijian Zhang, Rajesh P Ringe, Nathan Nicely, David Hua, Robert T Steinbock, Michael Golabek, James Alin, S Munir Alam, Albert Cupo, Barton F Haynes, John C Kappes, John P Moore, Joseph G Sodroski, Heather Desaire
HIV-1 envelope glycoprotein (Env) glycosylation is important because individual glycans are components of multiple broadly neutralizing antibody epitopes, while shielding other sites that might otherwise be immunogenic. The glycosylation on Env is influenced by a variety of factors, including the genotype of the protein, the cell line used for its expression, and the details of the construct design. Here, we used a mass spectrometry-based approach to map the complete glycosylation profile at every site in multiple HIV-1 Env trimers, accomplishing two goals: 1) We determined which glycosylation sites contain conserved glycan profiles across many trimeric Envs...
February 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28202751/superiority-in-rhesus-macaques-of-targeting-hiv-1-env-gp140-to-cd40-versus-lox-1-in-combination-with-replication-competent-nyvac-kc-for-induction-of-env-specific-antibody-and-t-cell-responses
#13
Gerard Zurawski, Xiaoying Shen, Sandra Zurawski, Georgia D Tomaras, David C Montefiori, Mario Roederer, Guido Ferrari, Christine Lacabaratz, Peter Klucar, Zhiqing Wang, Kathryn E Foulds, Shing-Fen Kao, Xuesong Yu, Alicia Sato, Nicole L Yates, Celia LaBranche, Sherry Stanfield-Oakley, Karen Kibler, Bertram Jacobs, Andres Salazar, Steve Self, Jimmy Fulp, Raphael Gottardo, Lindsey Galmin, Deborah Weiss, Anthony Cristillo, Giuseppe Pantaleo, Yves Levy
We compared the HIV-1-specific immune responses generated by targeting HIV-1 envelope protein (Env gp140) to either CD40 or LOX-1, two endocytic receptors on dendritic cells (DCs), in Rhesus macaques primed with a poxvirus vector (NYVAC-KC) expressing Env gp140. The DC-targeting vaccines, humanized recombinant monoclonal antibodies fused to Env gp140, were administered as a boost with poly ICLC adjuvant either alone or co-administered with the NYVAC-KC vector. All the DC-targeting vaccine administrations with poly ICLC increased the low-level serum anti-Env IgG responses elicited by NYVAC-KC priming significantly more (up to P =0...
February 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28194154/the-role-of-cd4-t-follicular-helper-cells-in-hiv-infection-from-the-germinal-center-to-the-periphery
#14
REVIEW
John Patrick Thornhill, Sarah Fidler, Paul Klenerman, John Frater, Chansavath Phetsouphanh
T follicular helper cells (TFh) are key components of the adaptive immune system; they are primarily found in germinal centers (GCs) where their interaction with B cells supports humoral immune responses and efficient antibody production. They are defined by the expression of CXC receptor 5, program death-1, ICOS, and secretion of IL-21. Their differentiation is regulated by B-cell lymphoma 6. The relationship and function of circulating TFh to bona fide TFh resident in the GC is much debated. HIV infection impacts the TFh response with evidence of aberrant TFh function observed in acute and chronic infection...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28187204/differentiating-founder-and-chronic-hiv-envelope-sequences
#15
John M Murray, Stephen Maher, Talia Mota, Kazuo Suzuki, Anthony D Kelleher, Rob J Center, Damian Purcell
Significant progress has been made in characterizing broadly neutralizing antibodies against the HIV envelope glycoprotein Env, but an effective vaccine has proven elusive. Vaccine development would be facilitated if common features of early founder virus required for transmission could be identified. Here we employ a combination of bioinformatic and operations research methods to determine the most prevalent features that distinguish 78 subtype B and 55 subtype C founder Env sequences from an equal number of chronic sequences...
2017: PloS One
https://www.readbyqxmd.com/read/28185743/differential-induction-of-anti-v3-crown-antibodies-with-cradle-and-ladle-binding-modes-in-response-to-hiv-1-envelope-vaccination
#16
Preetha Balasubramanian, Rajnish Kumar, Constance Williams, Vincenza Itri, Shixia Wang, Shan Lu, Ann J Hessell, Nancy L Haigwood, Faruk Sinangil, Keith W Higgins, Lily Liu, Liuzhe Li, Phillipe Nyambi, Miroslaw K Gorny, Maxim Totrov, Arthur Nadas, Xiang-Peng Kong, Susan Zolla-Pazner, Catarina E Hioe
The V3 loop in the HIV envelope gp120 is one of the immunogenic sites targeted by Abs. The V3 crown in particular has conserved structural elements recognized by cross-reactive neutralizing Abs, indicating its potential contribution in protection against HIV. Crystallographic analyses of anti-V3 crown mAbs in complex with the V3 peptides have revealed that these mAbs recognize the conserved sites on the V3 crown via two distinct strategies: a cradle-binding mode (V3C) and a ladle-binding (V3L) mode. However, almost all of the anti-V3 crown mAbs studied in the past were isolated from chronically HIV-infected individuals...
February 6, 2017: Vaccine
https://www.readbyqxmd.com/read/28179536/hiv-aids-vaccine-candidates-based-on-replication-competent-recombinant-poxvirus-nyvac-c-kc-expressing-trimeric-gp140-and-gag-derived-vlps-or-lacking-the-viral-molecule-b19-that-inhibits-type-i-interferon-activate-relevant-hiv-1-specific-b-and-t-cell-immune
#17
Juan García-Arriaza, Beatriz Perdiguero, Jonathan L Heeney, Michael S Seaman, David C Montefiori, Nicole L Yates, Georgia D Tomaras, Guido Ferrari, Kathryn E Foulds, Mario Roederer, Steven G Self, Bhavesh Borate, Raphael Gottardo, Sanjay Phogat, Jim Tartaglia, Susan W Barnett, Brian Burke, Anthony D Cristillo, Deborah E Weiss, Carter Lee, Karen V Kibler, Bertram L Jacobs, Ralf Wagner, Song Ding, Giuseppe Pantaleo, Mariano Esteban
The non-replicating attenuated poxvirus vector NYVAC expressing clade C(CN54) HIV-1 Env(gp120), Gag-Pol-Nef antigens (NYVAC-C) showed in phase I clinical trials limited immunogenicity. To enhance the capacity of the NYVAC vector to trigger broad humoral responses and a more balanced activation of CD4(+) and CD8(+) T cells, here we compared the HIV-1-specific immunogenicity elicited in non-human primates immunized with two replicating NYVAC vectors that have been modified by the insertion of K1L and C7L vaccinia viral host-range genes and express clade C(ZM96) trimeric HIV-1 gp140 protein or a Gag(ZM96)-Pol-Nef(CN54) polyprotein as Gag-derived virus-like particles (termed NYVAC-C-KC)...
February 8, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28179531/toll-like-receptor-7-agonist-gs-9620-induces-hiv-expression-and-hiv-specific-immunity-in-cells-from-hiv-infected-individuals-on-suppressive-antiretroviral-therapy
#18
Angela Tsai, Alivelu Irrinki, Jasmine Kaur, Tomas Cihlar, George Kukolj, Derek D Sloan, Jeffrey P Murry
Antiretroviral therapy can suppress HIV replication to undetectable levels but does not eliminate latent HIV, thus necessitating lifelong therapy. Recent efforts to target this persistent reservoir have focused on inducing the expression of latent HIV so that infected cells may be recognized and eliminated by the immune system. Toll like receptor (TLR) activation stimulates antiviral immunity and has been shown to induce HIV from latently infected cells. Activation of TLR7 leads to the production of several stimulatory cytokines, including type I interferons (IFNs)...
February 8, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28179429/serinc5-inhibits-hiv-1-fusion-pore-formation-by-promoting-functional-inactivation-of-envelope-glycoproteins
#19
Chetan Sood, Mariana Marin, Ajit Chande, Massimo Pizzato, Gregory B Melikyan
The host proteins, SERINC3 and SERINC5, have been recently shown to incorporate into HIV-1 particles and compromise their ability to fuse with target cells - an effect that is antagonized by the viral Nef protein. Env glycoproteins from different HIV-1 isolates exhibit a broad range of sensitivity to SERINC-mediated restriction, and the mechanism by which SERINCs interfere with HIV-1 fusion remains unclear. Here, we show that incorporation of SERINC5 into virions in the absence of Nef inhibits the formation of small fusion pores between viruses and cells...
February 8, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28177967/the-neutralizing-and-targeting-properties-of-a-new-set-of-%C3%AE-4%C3%AE-7-specific-antibodies-are-influenced-by-their-isotype
#20
Alexandre Girard, Katija Jelicic, Don Van Ryk, Nicolas Rochereau, Claudia Cicala, James Arthos, Christian Genin, Bernard Verrier, Stephanie Laurant, Diane Razanajaoana-Doll, Pin Jean-Jacques, Stéphane Paul
The homing of lymphocytes to mucosa is mainly controlled by α4β7 integrin, and it is amplified during gut chronic inflammation, as occurs with HIV and/or Inflammatory Bowel Diseases. We designed and applied an improved immunization strategy based on an innovative selection process to isolate new α4β7 lymphocyte-specific mAbs that are able to prevent their migration into inflamed gut tissues and/or to counteract HIV infection in vitro. Firstly, five mAbs (one IgA, one IgM, and four IgGs) were selected based on their capacity to recognize α4 or β7 homodimers and α4β7 heterodimers in transfected human cells...
February 7, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
keyword
keyword
77564
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"