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Vaccines

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Endogenous T cells prevent tumor immune escape following adoptive T cell therapy
Scott R. Walsh, … , Brian D. Lichty, Yonghong Wan
Scott R. Walsh, … , Brian D. Lichty, Yonghong Wan
Published November 4, 2019
Citation Information: J Clin Invest. 2019. https://doi.org/10.1172/JCI126199.
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Endogenous T cells prevent tumor immune escape following adoptive T cell therapy

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Abstract

While the outcome of adoptive T cell therapy (ACT) is typically correlated with the functionality of the inoculated T cells, the role of the endogenous T cells is unknown. The success of checkpoint blockade therapy has demonstrated the potentially curative value of preexisting tumor-primed T cells in cancer treatment. Given the results from checkpoint blockade therapy, we hypothesized that endogenous T cells contribute to long-term survival following ACT. Here, we describe a therapeutic approach combining ACT with an oncolytic vaccine that allows simultaneous analysis of antitumor immunity mediated by transferred and endogenous T cells. We found that, in addition to promoting the expansion and tumor infiltration of the transferred T cells, oncolytic vaccines boosted tumor-primed host T cells. We determined that transferred T cells contributed to rapid destruction of large tumor masses while endogenous T cells concurrently prevented the emergence of antigen-loss variants. Moreover, while transferred T cells disappeared shortly after tumor regression, endogenous T cells secured long-term memory with a broad repertoire of antigen specificity. Our findings suggest that this combination strategy may exploit the full potential of ACT and tumor-primed host T cells to eliminate the primary tumor, prevent immune escape, and provide long-term protective memory.

Authors

Scott R. Walsh, Boris Simovic, Lan Chen, Donald Bastin, Andrew Nguyen, Kyle Stephenson, Talveer S. Mandur, Jonathan L. Bramson, Brian D. Lichty, Yonghong Wan

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Antigen-loaded monocyte administration induces potent therapeutic anti-tumor T cell responses
Min-Nung Huang, … , John H. Sampson, Michael D. Gunn
Min-Nung Huang, … , John H. Sampson, Michael D. Gunn
Published October 29, 2019
Citation Information: J Clin Invest. 2019. https://doi.org/10.1172/JCI128267.
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Antigen-loaded monocyte administration induces potent therapeutic anti-tumor T cell responses

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Abstract

Efficacy of dendritic cell (DC) cancer vaccines is classically thought to depend on their antigen-presenting cell (APC) activity. Studies show, however, that DC vaccine priming of cytotoxic T lymphocytes (CTL) requires the activity of endogenous DC, suggesting that exogenous DC stimulate anti-tumor immunity by transferring antigen (Ag) to endogenous DC. Such Ag transfer functions are most commonly ascribed to monocytes, implying that undifferentiated monocytes would function equally well as a vaccine modality and need not be differentiated to DC to be effective. Here, we used several murine cancer models to test the anti-tumor efficacy of undifferentiated monocytes loaded with protein or peptide Ag. Intravenously injected monocytes displayed anti-tumor activity superior to DC vaccines in several cancer models, including aggressive intracranial glioblastoma. Ag-loaded monocytes induced robust CTL responses via Ag transfer to splenic CD8+ DC in a manner independent of monocyte APC activity. Ag transfer required cell-cell contact and the formation of connexin 43-containing gap junctions between monocytes and DC. These findings demonstrate the existence of an efficient gap junction-mediated Ag transfer pathway between monocytes and CD8+ DC and suggest that administration of tumor Ag-loaded undifferentiated monocytes may serve as a simple and efficacious immunotherapy for the treatment of human cancers.

Authors

Min-Nung Huang, Lowell T. Nicholson, Kristen A. Batich, Adam M. Swartz, David Kopin, Sebastian Wellford, Vijay K. Prabhakar, Karolina Woroniecka, Smita K. Nair, Peter E. Fecci, John H. Sampson, Michael D. Gunn

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Quadrivalent Vesiculovax vaccine protects nonhuman primates from viral-induced hemorrhagic fever and death
Robert W. Cross, … , John H. Eldridge, Thomas W. Geisbert
Robert W. Cross, … , John H. Eldridge, Thomas W. Geisbert
Published October 22, 2019
Citation Information: J Clin Invest. 2019. https://doi.org/10.1172/JCI131958.
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Quadrivalent Vesiculovax vaccine protects nonhuman primates from viral-induced hemorrhagic fever and death

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Abstract

Recent occurrences of filoviruses and the arenavirus Lassa virus (LASV) in overlapping endemic areas of Africa highlight the need for a prophylactic vaccine that would confer protection against all of these viruses that cause lethal hemorrhagic fever (HF). We developed a quadrivalent formulation of Vesiculovax that contains recombinant vesicular stomatitis virus (rVSV) vectors expressing filovirus glycoproteins and also contains a rVSV vector expressing the glycoprotein of a lineage IV strain of LASV. Cynomolgus macaques were vaccinated twice with the quadrivalent formulation, followed by challenge 28 days after the boost vaccination with each of the three corresponding filoviruses (Ebola, Sudan, Marburg) or a heterologous contemporary lineage II strain of LASV. Serum IgG and neutralizing antibody responses specific for all four glycoproteins were detected in all vaccinated animals. A modest and balanced cell-mediated immune response specific for the glycoproteins was also detected in most of the vaccinated macaques. Regardless of the levels of total glycoprotein-specific immune response detected after vaccination, all immunized animals were protected from disease and death following lethal challenges. These findings indicate that vaccination with attenuated rVSV vectors each expressing a single HF virus glycoprotein may provide protection against those filoviruses and LASV most commonly responsible for outbreaks of severe HF in Africa.

Authors

Robert W. Cross, Rong Xu, Demetrius Matassov, Stefan Hamm, Theresa E. Latham, Cheryl S. Gerardi, Rebecca M. Nowak, Joan B. Geisbert, Ayuko Ota-Setlik, Krystle N. Agans, Amara Luckay, Susan E. Witko, Lena Soukieh, Daniel J. Deer, Chad E. Mire, Heinz Feldmann, Christian Happi, Karla A. Fenton, John H. Eldridge, Thomas W. Geisbert

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Antibody Fc effector functions and IgG3 associate with decreased HIV-1 risk
Scott D. Neidich, … , Peter B. Gilbert, Georgia D. Tomaras
Scott D. Neidich, … , Peter B. Gilbert, Georgia D. Tomaras
Published October 7, 2019
Citation Information: J Clin Invest. 2019. https://doi.org/10.1172/JCI126391.
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Antibody Fc effector functions and IgG3 associate with decreased HIV-1 risk

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Abstract

HVTN 505 is a preventative vaccine efficacy trial testing DNA followed by recombinant adenovirus serotype 5 (rAd5) in circumcised, Ad5-seronegative men and transgendered persons who have sex with men in the United States. Identified immune correlates of lower HIV-1 risk and a virus sieve analysis revealed that, despite lacking overall efficacy, vaccine-elicited responses exerted pressure on infecting HIV-1 viruses. To interrogate the mechanism of the antibody correlate of HIV-1 risk, we examined antigen-specific antibody recruitment of Fcγ receptors (FcγRs), antibody-dependent cellular phagocytosis (ADCP), and the role of anti-envelope (anti-Env) IgG3. In a prespecified immune correlates analysis, antibody-dependent monocyte phagocytosis and antibody binding to FcγRIIa correlated with decreased HIV-1 risk. Follow-up analyses revealed that anti-Env IgG3 breadth correlated with reduced HIV-1 risk, anti-Env IgA negatively modified infection risk by Fc effector functions, and that vaccine recipients with a specific FcγRIIa single-nucleotide polymorphism locus had a stronger correlation with decreased HIV-1 risk when ADCP, Env-FcγRIIa, and IgG3 binding were high. Additionally, FcγRIIa engagement correlated with decreased viral load setpoint in vaccine recipients who acquired HIV-1. These data support a role for vaccine-elicited anti–HIV-1 Env IgG3, antibody engagement of FcRs, and phagocytosis as potential mechanisms for HIV-1 prevention.

Authors

Scott D. Neidich, Youyi Fong, Shuying S. Li, Daniel E. Geraghty, Brian D. Williamson, William Chad Young, Derrick Goodman, Kelly E. Seaton, Xiaoying Shen, Sheetal Sawant, Lu Zhang, Allan C. deCamp, Bryan S. Blette, Mengshu Shao, Nicole L. Yates, Frederick Feely, Chul-Woo Pyo, Guido Ferrari, HVTN 505 Team, Ian Frank, Shelly T. Karuna, Edith M. Swann, John R. Mascola, Barney S. Graham, Scott M. Hammer, Magdalena E. Sobieszczyk, Lawrence Corey, Holly E. Janes, M. Juliana McElrath, Raphael Gottardo, Peter B. Gilbert, Georgia D. Tomaras

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DNA priming and gp120 boosting induces HIV-specific antibodies in a randomized clinical trial
Nadine G. Rouphael, … , Michael C. Keefer, the HVTN 105 Protocol Team and the NIAID HIV Vaccine Trials Network
Nadine G. Rouphael, … , Michael C. Keefer, the HVTN 105 Protocol Team and the NIAID HIV Vaccine Trials Network
Published September 30, 2019
Citation Information: J Clin Invest. 2019. https://doi.org/10.1172/JCI128699.
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DNA priming and gp120 boosting induces HIV-specific antibodies in a randomized clinical trial

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BACKGROUND RV144 is the only preventive HIV vaccine regimen demonstrating efficacy in humans. Attempting to build upon RV144 immune responses, we conducted a phase 1, multicenter, randomized, double-blind trial to assess the safety and immunogenicity of regimens substituting the DNA-HIV-PT123 (DNA) vaccine for ALVAC-HIV in different sequences or combinations with AIDSVAX B/E (protein).METHODS One hundred and four HIV-uninfected participants were randomized to 4 treatment groups (T1, T2, T3, and T4) and received intramuscular injections at 0, 1, 3, and 6 months (M): T1 received protein at M0 and M1 and DNA at M3 and M6; T2 received DNA at M0 and M1 and protein at M3 and M6; T3 received DNA at M0, M1, M3, and M6 with protein coadministered at M3 and M6; and T4 received protein and DNA coadministered at each vaccination visit.RESULTS All regimens were well tolerated. Antibodies binding to gp120 and V1V2 scaffold were observed in 95%–100% of participants in T3 and T4, two weeks after final vaccination at high magnitude. While IgG3 responses were highest in T3, a lower IgA/IgG ratio was observed in T4. Binding antibodies persisted at 12 months in 35%–100% of participants. Antibody-dependent cell-mediated cytotoxicity and tier 1 neutralizing-antibody responses had higher response rates for T3 and T4, respectively. CD4+ T cell responses were detectable in all treatment groups (32%–64%) without appreciable CD8+ T cell responses.CONCLUSION The DNA/protein combination regimens induced high-magnitude and long-lasting HIV V1V2–binding antibody responses, and early coadministration of the 2 vaccines led to a more rapid induction of these potentially protective responses.TRIAL REGISTRATION ClinicalTrials.gov NCT02207920.FUNDING National Institute of Allergy and Infectious Diseases (NIAID) grants UM1 AI068614, UM1 AI068635, UM1 AI068618, UM1 AI069511, UM1 AI069470, UM1 AI069534, P30 AI450008, UM1 AI069439, UM1 AI069481, and UM1 AI069496; the National Center for Advancing Translational Sciences, NIH (grant UL1TR001873); and the Bill & Melinda Gates Foundation (grant OPP52845).

Authors

Nadine G. Rouphael, Cecilia Morgan, Shuying S. Li, Ryan Jensen, Brittany Sanchez, Shelly Karuna, Edith Swann, Magdalena E. Sobieszczyk, Ian Frank, Gregory J. Wilson, Hong-Van Tieu, Janine Maenza, Aliza Norwood, James Kobie, Faruk Sinangil, Giuseppe Pantaleo, Song Ding, M. Juliana McElrath, Stephen C. De Rosa, David C. Montefiori, Guido Ferrari, Georgia D. Tomaras, Michael C. Keefer, the HVTN 105 Protocol Team and the NIAID HIV Vaccine Trials Network

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Human VP8* mAbs neutralize rotavirus selectively in human intestinal epithelial cells
Ningguo Feng, … , B.V. Venkatar Prasad, Harry B. Greenberg
Ningguo Feng, … , B.V. Venkatar Prasad, Harry B. Greenberg
Published August 12, 2019
Citation Information: J Clin Invest. 2019. https://doi.org/10.1172/JCI128382.
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Human VP8* mAbs neutralize rotavirus selectively in human intestinal epithelial cells

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Abstract

We previously generated 32 rotavirus-specific (RV-specific) recombinant monoclonal antibodies (mAbs) derived from B cells isolated from human intestinal resections. Twenty-four of these mAbs were specific for the VP8* fragment of RV VP4, and most (20 of 24) were non-neutralizing when tested in the conventional MA104 cell–based assay. We reexamined the ability of these mAbs to neutralize RVs in human intestinal epithelial cells including ileal enteroids and HT-29 cells. Most (18 of 20) of the “non-neutralizing” VP8* mAbs efficiently neutralized human RV in HT-29 cells or enteroids. Serum RV neutralization titers in adults and infants were significantly higher in HT-29 than MA104 cells and adsorption of these sera with recombinant VP8* lowered the neutralization titers in HT-29 but not MA104 cells. VP8* mAbs also protected suckling mice from diarrhea in an in vivo challenge model. X-ray crystallographic analysis of one VP8* mAb (mAb9) in complex with human RV VP8* revealed that the mAb interaction site was distinct from the human histo-blood group antigen binding site. Since MA104 cells are the most commonly used cell line to detect anti-RV neutralization activity, these findings suggest that prior vaccine and other studies of human RV neutralization responses may have underestimated the contribution of VP8* antibodies to the overall neutralization titer.

Authors

Ningguo Feng, Liya Hu, Siyuan Ding, Mrinmoy Sanyal, Boyang Zhao, Banumathi Sankaran, Sasirekha Ramani, Monica McNeal, Linda L. Yasukawa, Yanhua Song, B.V. Venkatar Prasad, Harry B. Greenberg

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Innate gene signature distinguishes humoral versus cytotoxic responses to influenza vaccination
Eléna Gonçalves, … , Odile Launay, Behazine Combadière
Eléna Gonçalves, … , Odile Launay, Behazine Combadière
Published March 7, 2019
Citation Information: J Clin Invest. 2019. https://doi.org/10.1172/JCI125372.
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Innate gene signature distinguishes humoral versus cytotoxic responses to influenza vaccination

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Abstract

Background: Systems vaccinology allows cutting-edge analysis of innate biomarkers of vaccine efficacy. We have been exploring novel strategies to shape the adaptive immune response, by targeting innate immune cells through novel immunization routes. Methods: This randomized phase I/II clinical study (n=60 healthy subjects aged 18-45 years old) used transcriptomic analysis to discover early biomarkers of immune response quality after transcutaneous (t.c.), intradermal (i.d.), and intramuscular (i.m.) administration of a trivalent influenza vaccine (TIV season 2012-2013) (1:1:1 ratio). Safety and immunogenicity (hemagglutinin inhibition (HI), microneutralization (MN) antibodies and CD4, CD8 effector T cells) were measured at baseline Day (D)0 and at D21. Blood transcriptome was analyzed at D0 and D1. Results: TIV-specific CD8+GranzymeB+(GRZ) T cells appeared in more individuals immunized by the t.c. and i.d. routes, while immunization by the i.d. and i.m. routes prompted high levels of HI antibody titers and MN against A/H1N1 and A/H3N2 influenza viral strains. The early innate gene signature anticipated immunological outcome by discriminating two clusters of individuals with either distinct humoral or CD8 cytotoxic responses. Several pathways explained this dichotomy confirmed by nine genes and serum level of CXCL10 were correlated with either TIV-specific cytotoxic CD8+GRZ+ T-cell or antibody responses. A logistic regression analysis demonstrated that these nine genes and serum levels of CXCL10 (D1/D0) best foreseen TIV-specific CD8+GRZ+ T-cell and antibody responses at D21. Conclusion: This study provides new insight into the impact of immunization routes and innate signature in the quality of adaptive immune responses.

Authors

Eléna Gonçalves, Olivia Bonduelle, Angèle Soria, Pierre Loulergue, Alexandra Rousseau, Marine Cachanado, Henri Bonnabau, Rodolphe Thiebaut, Nicolas Tchitchek, Sylvie Behillil, Sylvie van der Werf, Annika Vogt, Tabassome Simon, Odile Launay, Behazine Combadière

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Mucosal vaccine efficacy against intrarectal SHIV is independent of anti-Env antibody response
Yongjun Sui, … , Robert C. Gallo, Jay A. Berzofsky
Yongjun Sui, … , Robert C. Gallo, Jay A. Berzofsky
Published February 18, 2019
Citation Information: J Clin Invest. 2019. https://doi.org/10.1172/JCI122110.
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Mucosal vaccine efficacy against intrarectal SHIV is independent of anti-Env antibody response

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It is widely believed that protection against acquisition of HIV or SIV infection requires anti-envelope (anti-Env) antibodies, and that cellular immunity may affect viral loads but not acquisition, except in special cases. Here we provide evidence to the contrary. Mucosal immunization may enhance HIV vaccine efficacy by eliciting protective responses at portals of exposure. Accordingly, we vaccinated macaques mucosally with HIV/SIV peptides, modified vaccinia Ankara–SIV (MVA-SIV), and HIV-gp120–CD4 fusion protein plus adjuvants, which consistently reduced infection risk against heterologous intrarectal SHIVSF162P4 challenge, both high dose and repeated low dose. Surprisingly, vaccinated animals exhibited no anti-gp120 humoral responses above background and Gag- and Env-specific T cells were induced but failed to correlate with viral acquisition. Instead, vaccine-induced gut microbiome alteration and myeloid cell accumulation in colorectal mucosa correlated with protection. Ex vivo stimulation of the myeloid cell–enriched population with SHIV led to enhanced production of trained immunity markers TNF-α and IL-6, as well as viral coreceptor agonist MIP1α, which correlated with reduced viral Gag expression and in vivo viral acquisition. Overall, our results suggest mechanisms involving trained innate mucosal immunity together with antigen-specific T cells, and also indicate that vaccines can have critical effects on the gut microbiome, which in turn can affect resistance to infection. Strategies to elicit similar responses may be considered for vaccine designs to achieve optimal protective efficacy.

Authors

Yongjun Sui, George K. Lewis, Yichuan Wang, Kurt Berckmueller, Blake Frey, Amiran Dzutsev, Diego Vargas-Inchaustegui, Venkatramanan Mohanram, Thomas Musich, Xiaoying Shen, Anthony DeVico, Timothy Fouts, David Venzon, James Kirk, Robert C. Waters, James Talton, Dennis Klinman, John Clements, Georgia D. Tomaras, Genoveffa Franchini, Marjorie Robert-Guroff, Giorgio Trinchieri, Robert C. Gallo, Jay A. Berzofsky

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Subdominance and poor intrinsic immunogenicity limit humoral immunity targeting influenza HA-stem
Hyon-Xhi Tan, … , Stephen J. Kent, Adam K. Wheatley
Hyon-Xhi Tan, … , Stephen J. Kent, Adam K. Wheatley
Published December 6, 2018
Citation Information: J Clin Invest. 2018. https://doi.org/10.1172/JCI123366.
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Subdominance and poor intrinsic immunogenicity limit humoral immunity targeting influenza HA-stem

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Abstract

Both natural influenza infection and current seasonal influenza vaccines primarily induce neutralising antibody responses against highly diverse epitopes within the “head” of the viral hemagglutinin (HA) protein. There is increasing interest on redirecting immunity towards the more conserved HA-stem or stalk as a means to broaden protective antibody responses. Here we examined HA-stem-specific B cell and T-follicular helper (Tfh) cell responses in the context of influenza infection and immunisation in mouse and monkey models. We found that during infection the stem domain was immunologically subdominant to the head in terms of serum antibody production and antigen-specific B and Tfh responses. Similarly, we found HA-stem immunogens were poorly immunogenic compared to the full-length HA with abolished sialic acid binding activity, with limiting Tfh elicitation a potential constraint to the induction or boosting of anti-stem immunity by vaccination. Finally, we confirm that currently licensed seasonal influenza vaccines can boost pre-existing memory responses against the HA-stem in humans. An increased understanding of the immune dynamics surrounding the HA-stem is essential to inform the design of next-generation influenza vaccines for broad and durable protection.

Authors

Hyon-Xhi Tan, Sinthujan Jegaskanda, Jennifer A. Juno, Robyn Esterbauer, Julius Wong, Hannah G. Kelly, Yi Liu, Danielle Tilmanis, Aeron C. Hurt, Jonathan W. Yewdell, Stephen J. Kent, Adam K. Wheatley

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Live-attenuated varicella zoster virus vaccine does not induce HIV target cell activation
Catia T. Perciani, … , Walter Jaoko, Kelly S. MacDonald
Catia T. Perciani, … , Walter Jaoko, Kelly S. MacDonald
Published December 4, 2018
Citation Information: J Clin Invest. 2018. https://doi.org/10.1172/JCI124473.
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Live-attenuated varicella zoster virus vaccine does not induce HIV target cell activation

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BACKGROUND. Varicella-zoster virus (VZV) is under consideration as a promising recombinant viral vector to deliver foreign antigens including HIV. However, new vectors have come under increased scrutiny since vaccination with Ad5-vectored HIV vaccine trials demonstrated increased HIV risk in individuals with pre-immunity to the vector which was thought to be associated with mucosal immune activation (IA). Therefore, defining the impact of VZV vaccination on IA is particularly important with the prospect of developing an HIV/VZV chimeric vaccine. METHODS. VZV-seropositive healthy Kenyan women (n=44) were immunized with high dose live-attenuated VZV vaccine, and the expression of IA markers including CD38 and HLA-DR on CD4 T cells isolated from blood, cervix and rectum, markers of cell migration and tissue retention and the concentration of genital and intestinal cytokines were assessed. A delayed group (n=22) was used to control for natural variations in these parameters. RESULTS. Although immunogenic, VZV vaccination did not result in significant difference in the frequency of cervical activated (HLA-DR+CD38+) CD4 T cells (median 1.61%, IQR 0.93%-2.76%) at 12 weeks post-vaccination when compared to baseline (median 1.58%, IQR 0.75%-3.04%), the primary outcome for this study. VZV vaccination also had no measurable effect on any of the IA parameters at 4, 8 and 12 weeks post-vaccination. CONCLUSION. This study provides the first-ever evidence about the effects of VZV-vaccination on human mucosal IA status and supports further evaluation of VZV as a potential vector in an HIV vaccine. TRIAL REGISTRATION. ClinicalTrials.gov NCT02514018. FUNDING. Primary support from CIHR. For others see below.

Authors

Catia T. Perciani, Bashir Farah, Rupert Kaul, Mario A. Ostrowski, Salaheddin M. Mahmud, Omu Anzala, Walter Jaoko, Kelly S. MacDonald

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