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Malik S, Muhammad K, Aslam SM, Waheed Y. Tracing the recent updates on vaccination approaches and significant adjuvants being developed against HIV. Expert Rev Anti Infect Ther 2023; 21:431-446. [PMID: 36803177 DOI: 10.1080/14787210.2023.2182771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
INTRODUCTION Human Immunodeficiency Virus type 1 (HIV1); the causative agent of Acquired Immunodeficiency Syndrome (AIDS), has been a major target of the scientific community to develop an anti-viral therapy. Some successful discoveries have been made during the last two decades in the form of availability of antiviral therapy in endemic regions. Nevertheless, a total cure and safety vaccine has not yet been designed to eradicate HIV from the world. AREAS COVERED The purpose of this comprehensive study is to compile recent data regarding therapeutic interventions against HIV and to determine future research needs in this field. A systematic research strategy has been used to gather data from recent, most advanced published electronic sources. Literature based results show that experiments at the invitro level and animal models are continuously in research annals and are providing hope for human trials. EXPERT OPINION There is still a gap and more work is needed in the direction of modern drug and vaccination designs. Moreover coordination is necessary among researchers, educationists, public health workers, and the general community to communicate and coordinate the repercussions associated with the deadly disease. It is important for taking timely measures regarding mitigation and adaptation with HIV in future.
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Affiliation(s)
- Shiza Malik
- Bridging Health Foundation, Rawalpindi, Pakistan
| | - Khalid Muhammad
- Department of Biology, College of Sciences, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Sanaa Masood Aslam
- Foundation University College of Dentistry, Foundation University Islamabad, Islamabad, Pakistan
| | - Yasir Waheed
- Office of Research, Innovation, and Commercialization (ORIC), Shaheed Zulfiqar Ali Bhutto Medical University (SZABMU), Islamabad, Pakistan.,Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Byblos, Lebanon
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2
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Different dendritic cells-based vaccine constructs influence HIV-1 antigen-specific immunological responses and cytokine generation in virion-exposed splenocytes. Int Immunopharmacol 2022; 113:109406. [DOI: 10.1016/j.intimp.2022.109406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 10/18/2022] [Accepted: 10/28/2022] [Indexed: 11/09/2022]
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Leal L, Couto E, Sánchez-Palomino S, Climent N, Fernández I, Miralles L, Romero Y, González T, Maleno MJ, Paño B, Pich J, Nicolau C, Gatell JM, Plana M, García F. Effect of Intranodally Administered Dendritic Cell-Based HIV Vaccine in Combination With Pegylated Interferon α-2a on Viral Control Following ART Discontinuation: A Phase 2A Randomized Clinical Trial. Front Immunol 2021; 12:767370. [PMID: 34858423 PMCID: PMC8632026 DOI: 10.3389/fimmu.2021.767370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 10/06/2021] [Indexed: 12/19/2022] Open
Abstract
Introduction Functional cure has been proposed as an alternative to lifelong antiretroviral therapy and therapeutic vaccines represent one of the most promising approaches. Materials and Methods We conducted a double-blind randomized placebo-controlled clinical trial to evaluate the safety, immunogenicity, and effect on viral dynamics of a therapeutic vaccine produced with monocyte-derived dendritic cells (MD-DC) loaded with a high dose of heat-inactivated autologous (HIA) HIV-1 in combination with pegylated interferon alpha 2a (IFNα-2a) in people with chronic HIV-1. Results Twenty-nine male individuals on successful ART and with CD4+ ≥450 cells/mm3 were randomized 1:1:1:1 to receive three ultrasound-guided inguinal intranodal immunizations, one every 2 weeks: (1) vaccine ~107 MD-DC pulsed with HIA-HIV-1 (1010 HIV RNA copies) (n = 8); (2) vaccine plus three doses of 180 mcg IFNα-2a at weeks 4-6 (n = 6); (3) placebo = saline (n = 7); and (4) placebo plus three doses of 180 mcg IFNα-2a (n = 8). Thereafter, treatment was interrupted (ATI). Vaccines, IFNα-2a, and the administration procedures were safe and well tolerated. All patients' viral load rebounded during the 12-week ATI period. According to groups, changes in viral set-point between pre-ART and during ATI were not significant. When comparing all groups, there was a tendency in changes in viral set-point between the vaccine group vs. vaccine + IFNα-2a group (>0.5log10 p = 0.05). HIV-1-specific T-cell responses (IFN-ƴ Elispot) were higher at baseline in placebo than in the vaccine group (2,259 ± 535 vs. 900 ± 200 SFC/106 PBMC, p = 0.028). A significant difference in the change of specific T-cell responses was only observed at week 4 between vaccine and placebo groups (694 ± 327 vs. 1,718 ± 282 SFC/106 PBMC, p = 0.04). No effect on T-cell responses or changes in viral reservoir were observed after INFα-2a administration. Discussion Results from this study show that intranodally administered DC therapeutic vaccine in combination with IFNα-2a was safe and well-tolerated but had a minimal impact on viral dynamics in HIV-1 chronic infected participants. Clinical Trial Registration (www.ClinicalTrials.gov), identifier NCT02767193.
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Affiliation(s)
- Lorna Leal
- Infectious Diseases Department-HIV Unit, Hospital Clínic Barcelona, Barcelona, Spain.,AIDS and HIV Infection Research Group, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,Faculty of Medicine, Universitat de Barcelona, Barcelona, Spain
| | - Elvira Couto
- Infectious Diseases Department-HIV Unit, Hospital Clínic Barcelona, Barcelona, Spain.,AIDS and HIV Infection Research Group, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Sonsoles Sánchez-Palomino
- AIDS and HIV Infection Research Group, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Núria Climent
- AIDS and HIV Infection Research Group, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Irene Fernández
- Infectious Diseases Department-HIV Unit, Hospital Clínic Barcelona, Barcelona, Spain.,AIDS and HIV Infection Research Group, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Laia Miralles
- AIDS and HIV Infection Research Group, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Yolanda Romero
- Infectious Diseases Department-HIV Unit, Hospital Clínic Barcelona, Barcelona, Spain.,AIDS and HIV Infection Research Group, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Tania González
- AIDS and HIV Infection Research Group, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Maria José Maleno
- AIDS and HIV Infection Research Group, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain
| | - Blanca Paño
- Diagnostic Imaging Center (CDI), Hospital Clínic Barcelona, Barcelona, Spain
| | - Judit Pich
- Clinical Trials Unit (CTU), Hospital Clínic Barcelona, Barcelona, Spain
| | - Carlos Nicolau
- Faculty of Medicine, Universitat de Barcelona, Barcelona, Spain.,Diagnostic Imaging Center (CDI), Hospital Clínic Barcelona, Barcelona, Spain
| | - José Maria Gatell
- Infectious Diseases Department-HIV Unit, Hospital Clínic Barcelona, Barcelona, Spain.,AIDS and HIV Infection Research Group, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,Faculty of Medicine, Universitat de Barcelona, Barcelona, Spain.,ViiV Healthcare, Barcelona, Spain
| | - Montserrat Plana
- AIDS and HIV Infection Research Group, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,Faculty of Medicine, Universitat de Barcelona, Barcelona, Spain
| | - Felipe García
- Infectious Diseases Department-HIV Unit, Hospital Clínic Barcelona, Barcelona, Spain.,AIDS and HIV Infection Research Group, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain.,Faculty of Medicine, Universitat de Barcelona, Barcelona, Spain
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Sadat Larijani M, Ramezani A, Mashhadi Abolghasem Shirazi M, Bolhassani A, Pouriayevali MH, Shahbazi S, Sadat SM. Evaluation of transduced dendritic cells expressing HIV-1 p24-Nef antigens in HIV-specific cytotoxic T cells induction as a therapeutic candidate vaccine. Virus Res 2021; 298:198403. [PMID: 33775753 DOI: 10.1016/j.virusres.2021.198403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 03/18/2021] [Accepted: 03/20/2021] [Indexed: 10/21/2022]
Abstract
Various approaches have been investigated to prevent or eliminate HIV-1 since 1981. However, the virus has been affecting human population worldwide with no effective vaccine yet. The conserved regions among the viral genes are suitable targets in mutable viruses to induce the immune responses via an effective delivery platform. In this study, we aimed at evaluation of p24 and nef in two forms of full and truncated genes as two fusion antigenic forms according to our previous bioinformatics analysis. The designed antigens were then transferred through ex vivo generated dendritic cells and also proteins in BALB/c to assess and compare immunogenicity. p24 and Nef amino acid sequences were aligned, then, the most conserved regions were selected and two fusion forms as the truncated (p24:80-231aa-Nef:120-150aa) and the full from (p24-Nef) were cloned and expressed in prokaryotic and eukaryotic systems. Lentiviral vectors were applied to generate recombinant virions harboring the genes of interest to transduce generated murine dendritic cells. BALB/c mice received the recombinant DCs or recombinant proteins according to the defined schedule. IgG development was assessed to determine humoral immune activity and cellular immune responses were evaluated by IL-5 and IFN-y induction. Granzyme B secretion was also investigated to determine CTL activity in different immunized groups. The data showed high induction of cellular immune responses in dendritic cell immunization specifically in immunized mice with the truncated form of the p24 and Nef by high secretion of IFN-y and strong CTL activity. Moreover, protein/ DC prime-boost formulation led to stronger Th1 pathway and strong CTL activation in comparison with other formulations. The generated recombinant dendritic cells expressing p24-Nef induced humoral and cellular immunity in a Th1 pathway specifically with the in silico predicted truncated antigen which could be of high value as a dendritic cell therapeutic vaccine candidate against HIV-1.
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Affiliation(s)
- Mona Sadat Larijani
- Clinical Research Department, Pasteur Institute of Iran, Tehran, Iran; Hepatitis, AIDS and Blood borne diseases Department, Pasteur Institute of Iran, Tehran, Iran
| | - Amitis Ramezani
- Clinical Research Department, Pasteur Institute of Iran, Tehran, Iran.
| | | | - Azam Bolhassani
- Hepatitis, AIDS and Blood borne diseases Department, Pasteur Institute of Iran, Tehran, Iran
| | - Mohammad Hassan Pouriayevali
- Department of Arboviruses and Viral Hemorrhagic Fevers (National Reference Laboratory), Pasteur Institute of Iran, Tehran, Iran
| | - Sepideh Shahbazi
- Hepatitis, AIDS and Blood borne diseases Department, Pasteur Institute of Iran, Tehran, Iran
| | - Seyed Mehdi Sadat
- Hepatitis, AIDS and Blood borne diseases Department, Pasteur Institute of Iran, Tehran, Iran.
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5
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D'haese S, Lacroix C, Garcia F, Plana M, Ruta S, Vanham G, Verrier B, Aerts JL. Off the beaten path: Novel mRNA-nanoformulations for therapeutic vaccination against HIV. J Control Release 2020; 330:1016-1033. [PMID: 33181204 DOI: 10.1016/j.jconrel.2020.11.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 11/05/2020] [Accepted: 11/06/2020] [Indexed: 12/16/2022]
Abstract
Over the last few years, immunotherapy for HIV in general and therapeutic vaccination in particular, has received a tremendous boost, both in preclinical research and in clinical applications. This interest is based on the evidence that the immune system plays a crucial role in controlling HIV infection, as shown for long-term non-progressors and elite controllers, and that immune responses can be manipulated towards targeting conserved epitopes. So far, the most successful approach has been vaccination with autologous dendritic cells (DCs) loaded ex vivo with antigens and activation signals. Although this approach offers much promise, it also comes with significant drawbacks such as the requirement of a specialized infrastructure and expertise, as well as major challenges for logistics and storage, making it extremely time consuming and costly. Therefore, methods are being developed to avoid the use of ex vivo generated, autologous DCs. One of these methods is based on mRNA for therapeutic vaccination. mRNA has proven to be a very promising vaccine platform, as the coding information for any desired protein, including antigens and activation signals, can be generated in a very short period of time, showing promise both as an off-the-shelf therapy and as a personalized approach. However, an important drawback of this approach is the short half-life of native mRNA, due to the presence of ambient RNases. In addition, proper immunization requires that the antigens are expressed, processed and presented at the right immunological site (e.g. the lymphoid tissues). An ambivalent aspect of mRNA as a vaccine is its capacity to induce type I interferons, which can have beneficial adjuvant effects, but also deleterious effects on mRNA stability and translation. Thus, proper formulation of the mRNA is crucially important. Many approaches for RNA formulation have already been tested, with mixed success. In this review we discuss the state-of-the-art and future trends for mRNA-nanoparticle formulations for HIV vaccination, both in the prophylactic and in the therapeutic setting.
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Affiliation(s)
- Sigrid D'haese
- Neuro-Aging & Viro-Immunotherapy (NAVI), Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Céline Lacroix
- Institute for the Biology and Chemistry of Proteins (IBCP), Lyon, France
| | | | | | - Simona Ruta
- Carol Davila University of Medicine and Pharmacy, Stefan S. Nicolau Institute of Virology, Bucharest, Romania
| | - Guido Vanham
- Institute of Tropical Medicine and University of Antwerp, Antwerp, Belgium
| | - Bernard Verrier
- Institute for the Biology and Chemistry of Proteins (IBCP), Lyon, France
| | - Joeri L Aerts
- Neuro-Aging & Viro-Immunotherapy (NAVI), Vrije Universiteit Brussel (VUB), Brussels, Belgium.
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Role of Dendritic Cells in Exposing Latent HIV-1 for the Kill. Viruses 2019; 12:v12010037. [PMID: 31905690 PMCID: PMC7019604 DOI: 10.3390/v12010037] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 12/19/2019] [Accepted: 12/24/2019] [Indexed: 12/11/2022] Open
Abstract
The development of effective yet nontoxic strategies to target the latent human immunodeficiency virus-1 (HIV-1) reservoir in antiretroviral therapy (ART)-suppressed individuals poses a critical barrier to a functional cure. The ‘kick and kill’ approach to HIV eradication entails proviral reactivation during ART, coupled with generation of cytotoxic T lymphocytes (CTLs) or other immune effectors equipped to eliminate exposed infected cells. Pharmacological latency reversal agents (LRAs) that have produced modest reductions in the latent reservoir ex vivo have not impacted levels of proviral DNA in HIV-infected individuals. An optimal cure strategy incorporates methods that facilitate sufficient antigen exposure on reactivated cells following the induction of proviral gene expression, as well as the elimination of infected targets by either polyfunctional HIV-specific CTLs or other immune-based strategies. Although conventional dendritic cells (DCs) have been used extensively for the purpose of inducing antigen-specific CTL responses in HIV-1 clinical trials, their immunotherapeutic potential as cellular LRAs has been largely ignored. In this review, we discuss the challenges associated with current HIV-1 eradication strategies, as well as the unharnessed potential of ex vivo-programmed DCs for both the ‘kick and kill’ of latent HIV-1.
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7
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Ko EJ, Robert-Guroff M. Dendritic Cells in HIV/SIV Prophylactic and Therapeutic Vaccination. Viruses 2019; 12:v12010024. [PMID: 31878130 PMCID: PMC7019216 DOI: 10.3390/v12010024] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 12/12/2019] [Accepted: 12/20/2019] [Indexed: 12/12/2022] Open
Abstract
Dendritic cells (DCs) are involved in human and simian immunodeficiency virus (HIV and SIV) pathogenesis but also play a critical role in orchestrating innate and adaptive vaccine-specific immune responses. Effective HIV/SIV vaccines require strong antigen-specific CD4 T cell responses, cytotoxic activity of CD8 T cells, and neutralizing/non-neutralizing antibody production at mucosal and systemic sites. To develop a protective HIV/SIV vaccine, vaccine regimens including DCs themselves, protein, DNA, mRNA, virus vectors, and various combinations have been evaluated in different animal and human models. Recent studies have shown that DCs enhanced prophylactic HIV/SIV vaccine efficacy by producing pro-inflammatory cytokines, improving T cell responses, and recruiting effector cells to target tissues. DCs are also targets for therapeutic HIV/SIV vaccines due to their ability to reverse latency, present antigen, and augment T and B cell immunity. Here, we review the complex interactions of DCs over the course of HIV/SIV prophylactic and therapeutic immunizations, providing new insights into development of advanced DC-targeted HIV/SIV vaccines.
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Affiliation(s)
- Eun-Ju Ko
- College of Veterinary Medicine, Jeju National University, Jeju 63243, Korea
- Interdisciplinary Graduate Program in Advanced Convergence Technology & Science, Jeju National University, Jeju 63243, Korea
- Correspondence: (E.-J.K.); (M.R.-G.)
| | - Marjorie Robert-Guroff
- Vaccine Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
- Correspondence: (E.-J.K.); (M.R.-G.)
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Santillo BT, Reis DDS, da Silva LT, Romani NT, Duarte AJDS, Oshiro TM. Phenotypic and functional profile of IFN-α-differentiated dendritic cells (IFN-DCs) from HIV-infected individuals. Hum Vaccin Immunother 2018; 15:2140-2149. [PMID: 30427745 PMCID: PMC6773379 DOI: 10.1080/21645515.2018.1547603] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 10/10/2018] [Accepted: 10/24/2018] [Indexed: 01/09/2023] Open
Abstract
Dendritic cell (DC)-based immunotherapy is a promising strategy for the treatment of HIV-infected individuals. Different from the conventional protocol for DC differentiation based on the cytokine IL-4 (IL4-DCs), several studies have suggested obtaining DCs by culturing monocytes with type I IFN (IFN-α) to yield IFN-DCs, as performed in cancer therapy. To evaluate the phenotypic and functional characteristics, monocytes from HIV-infected subjects were differentiated into IFN-DCs or IL4-DCs, pulsed with chemically inactivated HIV and stimulated with pro-inflammatory cytokines. A comparative analysis between both types of monocyte-derived DCs (MoDCs) showed that immature IFN-DCs were phenotypically distinct from immature IL4-DCs at the baseline of differentiation, presenting a pre-activated profile. From the functional profile, we determined that IFN-DCs were capable of producing the cytokine IL-12 p70 and of inducing the production of IFN-γ by CD4 + T lymphocytes but not by TCD8+ lymphocytes. Our results suggest that IFN-DCs derived from HIV-infected individuals are able to recognize and present viral antigens to induce TCD4+ cellular immunity to HIV.
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Affiliation(s)
- Bruna Tereso Santillo
- Laboratório de Dermatologia e Imunodeficiências LIM56, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
- Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, Sao Paulo, SP, Brazil
| | - Denise da Silva Reis
- Laboratório de Dermatologia e Imunodeficiências LIM56, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
- Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, Sao Paulo, SP, Brazil
| | - Laís Teodoro da Silva
- Laboratório de Dermatologia e Imunodeficiências LIM56, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Nathalia Teixeira Romani
- Laboratório de Dermatologia e Imunodeficiências LIM56, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Alberto José da Silva Duarte
- Laboratório de Dermatologia e Imunodeficiências LIM56, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
| | - Telma Miyuki Oshiro
- Laboratório de Dermatologia e Imunodeficiências LIM56, Hospital das Clinicas HCFMUSP, Faculdade de Medicina, Universidade de Sao Paulo, Sao Paulo, SP, Brazil
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Reis EC, da Silva LT, da Silva WC, Rios A, Duarte AJ, Oshiro TM, Crovella S, Pontillo A. Host genetics contributes to the effectiveness of dendritic cell-based HIV immunotherapy. Hum Vaccin Immunother 2018; 14:1995-2002. [PMID: 29641325 DOI: 10.1080/21645515.2018.1463942] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Systems biological analysis has recently revealed how innate immune variants as well as gut microbiota impact the individual response to immunization. HIV-infected (HIV+) patients have a worse response rate after standard vaccinations, possibly due to the immune exhaustion, increased gut permeability and microbial translocation. In the last decade, dendritic cells (DC)-based immunotherapy has been proposed as an alternative approach to control HIV plasma viral load, however clinical trials showed a heterogeneity of immunization response. Hypothesizing that host genetics may importantly affects the outcome of immunotherapy in HIV+ patients, genetic polymorphisms' distribution and gene expression modulation were analyzed in a phase I/II clinical trial of DC-based immunotherapy according to immunization response, and quality of vaccine product (DC). Polymorphisms in genes previously associated with progression of HIV infection to AIDS (i.e.: PARD3B, CCL5) contribute to a better response to immunotherapy in HIV+ individuals, possibly through a systemic effect on host immune system, but also directly on vaccine product. Genes expression profile after immunization correlates with different degrees of immune chronic activation/exhaustion of HIV+ patients (i.e. PD1, IL7RA, EOMES), but also with anti-viral response and DC quality (i.e.: APOBEC3G, IL8, PPIA), suggested that an immunocompetent individual would have a better vaccine response. These findings showed once more that host genetics can affect the response to DC-based immunotherapy in HIV+ individuals, contributing to the heterogeneity of response observed in concluded trials; and it can be used as predictor of immunization success.
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Affiliation(s)
- Edione C Reis
- a Laboratório de Imunogenética, Departamento de Imunologia , Instituto de Ciências Biomédicas/ICB, Universidade de São Paulo/USP , São Paulo , SP , Brazil
| | - Lais T da Silva
- b Laboratório de Investigação Médica LIM-56, Departamento de Dermatologia , Faculdade de Medicina, Universidade de São Paulo/USP , São Paulo , SP , Brazil
| | - Wanessa C da Silva
- b Laboratório de Investigação Médica LIM-56, Departamento de Dermatologia , Faculdade de Medicina, Universidade de São Paulo/USP , São Paulo , SP , Brazil
| | - Alexandre Rios
- a Laboratório de Imunogenética, Departamento de Imunologia , Instituto de Ciências Biomédicas/ICB, Universidade de São Paulo/USP , São Paulo , SP , Brazil
| | - Alberto J Duarte
- b Laboratório de Investigação Médica LIM-56, Departamento de Dermatologia , Faculdade de Medicina, Universidade de São Paulo/USP , São Paulo , SP , Brazil
| | - Telma M Oshiro
- b Laboratório de Investigação Médica LIM-56, Departamento de Dermatologia , Faculdade de Medicina, Universidade de São Paulo/USP , São Paulo , SP , Brazil
| | - Sergio Crovella
- c Departamento de Genética , Universidade Federal de Pernambuco , Recife , PE , Brazil
| | - Alessandra Pontillo
- a Laboratório de Imunogenética, Departamento de Imunologia , Instituto de Ciências Biomédicas/ICB, Universidade de São Paulo/USP , São Paulo , SP , Brazil
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Surenaud M, Lacabaratz C, Zurawski G, Lévy Y, Lelièvre JD. Development of an epitope-based HIV-1 vaccine strategy from HIV-1 lipopeptide to dendritic-based vaccines. Expert Rev Vaccines 2018; 16:955-972. [PMID: 28879788 DOI: 10.1080/14760584.2017.1374182] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
INTRODUCTION Development of a safe, effective and globally affordable Human Immunodeficiency Virus strain 1 (HIV-1) vaccine offers the best hope for future control of the HIV-1 pandemic. However, with the exception of the recent RV144 trial, which elicited a modest level of protection against infection, no vaccine candidate has shown efficacy in preventing HIV-1 infection or in controlling virus replication in humans. There is also a great need for a successful immunotherapeutic vaccine since combination antiretroviral therapy (cART) does not eliminate the reservoir of HIV-infected cells. But to date, no vaccine candidate has proven to significantly alter the natural history of an individual with HIV-1 infection. Areas covered: For over 25 years, the ANRS (France Recherche Nord&Sud Sida-HIV hépatites) has been committed to an original program combining basic science and clinical research developing an epitope-based vaccine strategy to induce a multiepitopic cellular response against HIV-1. This review describes the evolution of concepts, based on strategies using HIV-1 lipopeptides towards the use of dendritic cell (DC) manipulation. Expert commentary: Understanding the crucial role of DCs in immune responses allowed moving from the non-specific administration of HIV-1 sequences with lipopeptides to DC-based vaccines. These DC-targeting strategies should improve HIV-1 vaccine efficacy.
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Affiliation(s)
- Mathieu Surenaud
- a INSERM, U955 , Créteil , France.,b Faculté de médecine , Université Paris Est , Créteil , France.,c Vaccine Research Institute (VRI) , Créteil , France
| | - Christine Lacabaratz
- a INSERM, U955 , Créteil , France.,b Faculté de médecine , Université Paris Est , Créteil , France.,c Vaccine Research Institute (VRI) , Créteil , France
| | - Gérard Zurawski
- a INSERM, U955 , Créteil , France.,c Vaccine Research Institute (VRI) , Créteil , France.,d Baylor Institute for Immunology Research , Dallas , TX , USA
| | - Yves Lévy
- a INSERM, U955 , Créteil , France.,b Faculté de médecine , Université Paris Est , Créteil , France.,c Vaccine Research Institute (VRI) , Créteil , France.,e AP-HP, Hôpital H. Mondor - A. Chenevier, Service d'Immunologie Clinique et Maladies Infectieuses , Créteil , France
| | - Jean-Daniel Lelièvre
- a INSERM, U955 , Créteil , France.,b Faculté de médecine , Université Paris Est , Créteil , France.,c Vaccine Research Institute (VRI) , Créteil , France.,e AP-HP, Hôpital H. Mondor - A. Chenevier, Service d'Immunologie Clinique et Maladies Infectieuses , Créteil , France
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Gay CL, DeBenedette MA, Tcherepanova IY, Gamble A, Lewis WE, Cope AB, Kuruc JD, McGee KS, Kearney MF, Coffin JM, Archin NM, Hicks CB, Eron JJ, Nicolette CA, Margolis DM. Immunogenicity of AGS-004 Dendritic Cell Therapy in Patients Treated During Acute HIV Infection. AIDS Res Hum Retroviruses 2018. [PMID: 28636433 DOI: 10.1089/aid.2017.0071] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
AGS-004 consists of matured autologous dendritic cells co-electroporated with in vitro transcribed RNA encoding autologous HIV antigens. In an open-label, single arm sub-study of AGS-004-003, AGS-004 was administered monthly to suppressed participants who started antiretroviral therapy (ART) during acute HIV infection. HIV-1 specific T cell responses were measured by multicolor flow cytometry after 3-4 doses. The frequency of resting CD4+ T-cell infection (RCI) was measured by quantitative viral outgrowth assay. Participants demonstrating increased immune response postvaccination were eligible for analytic treatment interruption (ATI). AGS-004 induced a positive immune response defined as ≥2-fold increase from baseline in the number of multifunctional HIV-1 specific CD28+/CD45RA- CD8+ effector/memory cytoxic T-lymphocytes (CTLs) in all six participants. All participants underwent ATI with rebound viremia at a median of 29 days. Immune correlates between time to viral rebound and the induction of effector CTLs were determined. Baseline RCI was low in most participants (0.043-0.767 IUPM). One participant had a >2-fold decrease (0.179-0.067 infectious units per million [IUPM]) in RCI at week 10. One participant with the lowest RCI had the longest ATI. AGS-004 dendritic cell administration increased multifunctional HIV-specific CD28+/CD45RA- CD8+ memory T cell responses in all participants, but did not permit sustained ART interruption. However, greater expansion of CD28-/CCR7-/CD45RA- CD8+ effector T cell responses correlated with a longer time to viral rebound. AGS-004 may be a useful tool to augment immune responses in the setting of latency reversal and eradication strategies.
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Affiliation(s)
- Cynthia L. Gay
- University of North Carolina HIV Cure Center, Chapel Hill, North Carolina
- Department of Medicine, University of North Carolina Chapel Hill, Chapel Hill, North Carolina
| | | | | | | | | | - Anna B. Cope
- Department of Medicine, University of North Carolina Chapel Hill, Chapel Hill, North Carolina
- Department of Epidemiology, University of North Carolina Chapel Hill, Chapel Hill, North Carolina
| | - JoAnn D. Kuruc
- University of North Carolina HIV Cure Center, Chapel Hill, North Carolina
- Department of Medicine, University of North Carolina Chapel Hill, Chapel Hill, North Carolina
| | | | | | | | - Nancie M. Archin
- University of North Carolina HIV Cure Center, Chapel Hill, North Carolina
- Department of Medicine, University of North Carolina Chapel Hill, Chapel Hill, North Carolina
| | | | - Joseph J. Eron
- University of North Carolina HIV Cure Center, Chapel Hill, North Carolina
- Department of Medicine, University of North Carolina Chapel Hill, Chapel Hill, North Carolina
| | | | - David M. Margolis
- University of North Carolina HIV Cure Center, Chapel Hill, North Carolina
- Department of Medicine, University of North Carolina Chapel Hill, Chapel Hill, North Carolina
- Department of Microbiology and Immunology, University of North Carolina Chapel Hill, Chapel Hill, North Carolina
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12
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Moura Rodrigues R, Plana M, Garcia F, Zupin L, Kuhn L, Crovella S. Genome-wide scan in two groups of HIV-infected patients treated with dendritic cell-based immunotherapy. Immunol Res 2017; 64:1207-1215. [PMID: 27704462 DOI: 10.1007/s12026-016-8875-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We performed a retrospective genome-wide association study in HIV-infected individuals who were treated with dendritic cell-based immunotherapy in clinical trials performed by two research groups (Spain and Brazil). We aimed to identify host genetic variants influencing treatment response. The Illumina Human Core Exome 12 v 1.0 Bead Chip with over 250,000 markers was used to analyze genetic factors affecting treatment response. Additionally, we performed a meta-analysis of the results obtained from Spanish and Brazilian patients. We identified a genetic variation (rs7935564 G allele) in TRIM22 gene, which encodes TRIM22 protein acting like a HIV restriction factor, as being associated with good response to dendritic cell-based immunotherapy. We then verified the impact of TRIM22 rs7935564 SNP in susceptibility to HIV infection and disease progression by assessing the influence of biogeographic ancestry in the distribution of allelic and genotype frequencies in three populations from Italy, Brazil and Zambia. TRIM22 rs7935564 genotyping indicated association of G rs7935564 allele with long-term non-progression of HIV disease in Italian patients, thus corroborating our hypothesis that it is involved as a restriction factor in dendritic cell-based immunotherapy response. TRIM22 rs7935564 polymorphism was associated with good response to dendritic cell-based immunotherapy. We hypothesize that in selecting patients for treatment, there is a possible bias related to the natural presence of restriction factors that are genetically determined and could influence final outcome of therapy.
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Affiliation(s)
- Ronald Moura Rodrigues
- Department of Genetics, Federal University of Pernambuco, Recife, Brazil.,Laboratory of Immunopathology Keizo Azami (LIKA), Federal University of Pernambuco, Recife, Brazil
| | - Monserrat Plana
- Retrovirology and Cellular Immunopathology Laboratory, AIDS Research Group, Catalan Project for the Development of an HIV Vaccine (HIVACAT), Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Hospital Clínic de Barcelona, Barcelona, Spain
| | - Felipe Garcia
- Infectious Diseases Unit, AIDS Research Group, Catalan Project for the Development of an HIV Vaccine (HIVACAT), Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Hospital Clínic de Barcelona, Barcelona, Spain
| | - Luisa Zupin
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Via dell'Istria 65/1, Zip code: 34137, Trieste, Italy.,Department of Medicine, Surgery and Health Sciences,, University of Trieste, Trieste, Italy
| | - Louise Kuhn
- Department of Epidemiology, Columbia University, New York, NY, USA
| | - Sergio Crovella
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Via dell'Istria 65/1, Zip code: 34137, Trieste, Italy. .,Department of Medicine, Surgery and Health Sciences,, University of Trieste, Trieste, Italy.
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13
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Amadori C, van der Velden YU, Bonnard D, Orlov I, van Bel N, Le Rouzic E, Miralles L, Brias J, Chevreuil F, Spehner D, Chasset S, Ledoussal B, Mayr L, Moreau F, García F, Gatell J, Zamborlini A, Emiliani S, Ruff M, Klaholz BP, Moog C, Berkhout B, Plana M, Benarous R. The HIV-1 integrase-LEDGF allosteric inhibitor MUT-A: resistance profile, impairment of virus maturation and infectivity but without influence on RNA packaging or virus immunoreactivity. Retrovirology 2017; 14:50. [PMID: 29121950 PMCID: PMC5680779 DOI: 10.1186/s12977-017-0373-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 10/27/2017] [Indexed: 01/22/2023] Open
Abstract
Background
HIV-1 Integrase (IN) interacts with the cellular co-factor LEDGF/p75 and tethers the HIV preintegration complex to the host genome enabling integration. Recently a new class of IN inhibitors was described, the IN-LEDGF allosteric inhibitors (INLAIs). Designed to interfere with the IN-LEDGF interaction during integration, the major impact of these inhibitors was surprisingly found on virus maturation, causing a reverse transcription defect in target cells. Results
Here we describe the MUT-A compound as a genuine INLAI with an original chemical structure based on a new type of scaffold, a thiophene ring. MUT-A has all characteristics of INLAI compounds such as inhibition of IN-LEDGF/p75 interaction, IN multimerization, dual antiretroviral (ARV) activities, normal packaging of genomic viral RNA and complete Gag protein maturation. MUT-A has more potent ARV activity compared to other INLAIs previously reported, but similar profile of resistance mutations and absence of ARV activity on SIV. HIV-1 virions produced in the presence of MUT-A were non-infectious with the formation of eccentric condensates outside of the core. In studying the immunoreactivity of these non-infectious virions, we found that inactivated HIV-1 particles were captured by anti-HIV-specific neutralizing and non-neutralizing antibodies (b12, 2G12, PGT121, 4D4, 10-1074, 10E8, VRC01) with efficiencies comparable to non-treated virus. Autologous CD4+ T lymphocyte proliferation and cytokine induction by monocyte-derived dendritic cells (MDDC) pulsed either with MUT-A-inactivated HIV or non-treated HIV were also comparable. Conclusions
Although strongly defective in infectivity, HIV-1 virions produced in the presence of the MUT-A INLAI have a normal protein and genomic RNA content as well as B and T cell immunoreactivities comparable to non-treated HIV-1. These inactivated viruses might form an attractive new approach in vaccine research in an attempt to study if this new type of immunogen could elicit an immune response against HIV-1 in animal models. Electronic supplementary material The online version of this article (10.1186/s12977-017-0373-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Céline Amadori
- Biodim Mutabilis, 93230, Romainville, France.,INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,University Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Yme Ubeles van der Velden
- Laboratory of Experimental Virology, Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | | | - Igor Orlov
- Centre for Integrative Biology, IGBMC, CNRS, INSERM, University of Strasbourg, Strasbourg, France
| | - Nikki van Bel
- Laboratory of Experimental Virology, Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | | | - Laia Miralles
- AIDS Research Group, IDIBAPS, Hospital Clinic, Barcelona, Spain
| | - Julie Brias
- Biodim Mutabilis, 93230, Romainville, France
| | | | - Daniele Spehner
- Centre for Integrative Biology, IGBMC, CNRS, INSERM, University of Strasbourg, Strasbourg, France
| | | | | | | | | | - Felipe García
- AIDS Research Group, IDIBAPS, Hospital Clinic, Barcelona, Spain
| | - José Gatell
- AIDS Research Group, IDIBAPS, Hospital Clinic, Barcelona, Spain
| | - Alessia Zamborlini
- CNRS, UMR7212, INSERM U944, Université Paris Diderot, Conservatoire National des Arts et Métiers, Paris, France
| | - Stéphane Emiliani
- INSERM, U1016, Institut Cochin, Paris, France.,CNRS, UMR8104, Paris, France.,University Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Marc Ruff
- Centre for Integrative Biology, IGBMC, CNRS, INSERM, University of Strasbourg, Strasbourg, France
| | - Bruno P Klaholz
- Centre for Integrative Biology, IGBMC, CNRS, INSERM, University of Strasbourg, Strasbourg, France
| | | | - Ben Berkhout
- Laboratory of Experimental Virology, Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
| | - Montserrat Plana
- AIDS Research Group, IDIBAPS, Hospital Clinic, Barcelona, Spain.
| | - Richard Benarous
- Biodim Mutabilis, 93230, Romainville, France. .,, 19 rue de Croulebarbe, 75013, Paris, France.
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Abstract
PURPOSE OF REVIEW The purpose of this article is to review recent advances in immunotherapeutic approaches aiming at reducing the latent HIV reservoir. RECENT FINDINGS HIV-1 establishes early during infection a pool of latently infected cells that persist long term and are largely undetectable to the immune system. Highly active antiretroviral therapy has dramatically improved the life expectancy and life quality of HIV-1-infected individuals, but is incapable of eliminating the pool of latently HIV-1-infected cells. Recent studies have started to test immunotherapeutic interventions in combination with latency reversing agents to reduce the latent HIV-1 reservoir, including approaches aimed at enhancing antiviral T-cell immunity, innate immunity, and virus-specific antibodies. SUMMARY The better understanding of virus-specific immunity and the pathways used by HIV-1 to evade host immune responses have enabled the development of new strategies focusing on targeting latently HIV-1-infected cells, with the goal to reduce the HIV-1 reservoir. Here, we will review recent advances in harnessing effector cells of the immune system, including CD8 T cells and natural killer cells, antiviral antibodies and new immunomodulatory molecules, to target HIV-1 persistence.
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15
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Wolfson B, Yu JE, Zhou Q. Exosomes may play a crucial role in HIV dendritic cell immunotherapy. ANNALS OF TRANSLATIONAL MEDICINE 2017; 5:337. [PMID: 28861434 DOI: 10.21037/atm.2017.05.09] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Benjamin Wolfson
- Department of Biochemistry and Molecular Biology, Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Justine E Yu
- Department of Biochemistry and Molecular Biology, Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Qun Zhou
- Department of Biochemistry and Molecular Biology, Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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16
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Leal L, Lucero C, Gatell JM, Gallart T, Plana M, García F. New challenges in therapeutic vaccines against HIV infection. Expert Rev Vaccines 2017; 16:587-600. [PMID: 28431490 DOI: 10.1080/14760584.2017.1322513] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
INTRODUCTION There is a growing interest in developing curative strategies for HIV infection. Therapeutic vaccines are one of the most promising approaches. We will review the current knowledge and the new challenges in this research field. Areas covered: PubMed and ClinicalTrial.gov databases were searched to review the progress and prospects for clinical development of immunotherapies aimed to cure HIV infection. Dendritic cells (DC)-based vaccines have yielded the best results in the field. However, major immune-virologic barriers may hamper current vaccine strategies. We will focus on some new challenges as the antigen presentation by DCs, CTL escape mutations, B cell follicle sanctuary, host immune environment (inflammation, immune activation, tolerance), latent reservoir and the lack of surrogate markers of response. Finally, we will review the rationale for designing new therapeutic vaccine candidates to be used alone or in combination with other strategies to improve their effectiveness. Expert commentary: In the next future, the combination of DCs targeting candidates, inserts to redirect responses to unmutated parts of the virus, adjuvants to redirect responses to sanctuaries or improve the balance between activation/tolerance (IL-15, anti-PD1 antibodies) and latency reversing agents could be necessary to finally achieve the remission of HIV-1 infection.
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Affiliation(s)
- Lorna Leal
- a Infectious Diseases Unit, HIVACAT, Hospital Clínic, IDIBAPS , University of Barcelona , Barcelona , Spain
| | - Constanza Lucero
- a Infectious Diseases Unit, HIVACAT, Hospital Clínic, IDIBAPS , University of Barcelona , Barcelona , Spain
| | - Josep M Gatell
- a Infectious Diseases Unit, HIVACAT, Hospital Clínic, IDIBAPS , University of Barcelona , Barcelona , Spain
| | - Teresa Gallart
- b Retrovirology and Viral Immunopathology Laboratories, HIVACAT, Hospital Clínic, IDIBAPS , University of Barcelona , Barcelona , Spain
| | - Montserrat Plana
- b Retrovirology and Viral Immunopathology Laboratories, HIVACAT, Hospital Clínic, IDIBAPS , University of Barcelona , Barcelona , Spain
| | - Felipe García
- a Infectious Diseases Unit, HIVACAT, Hospital Clínic, IDIBAPS , University of Barcelona , Barcelona , Spain
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17
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Preclinical evaluation of an mRNA HIV vaccine combining rationally selected antigenic sequences and adjuvant signals (HTI-TriMix). AIDS 2017; 31:321-332. [PMID: 27677160 DOI: 10.1097/qad.0000000000001276] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND The development of a prophylactic vaccine against HIV-1 has so far not been successful. Therefore, attention has shifted more and more toward the development of novel therapeutic vaccines. Here, we evaluated a new mRNA-based therapeutic vaccine against HIV-1-encoding activation signals (TriMix: CD40L + CD70 + caTLR4) combined with rationally selected antigenic sequences [HIVACAT T-cell immunogen (HTI)] sequence: comprises 16 joined fragments from Gag, Pol, Vif, and Nef). METHODS For this purpose, peripheral blood mononuclear cells from HIV-1-infected individuals on cART, lymph node explants from noninfected humans, and splenocytes from immunized mice were collected and several immune functions were measured. RESULTS Electroporation of immature monocyte-derived dendritic cells from HIV-infected patients with mRNA encoding HTI + TriMix potently activated dendritic cells which resulted in upregulation of maturation markers and cytokine production and T-cell stimulation, as evidenced by enhanced proliferation and cytokine secretion (IFN-γ). Responses were HIV specific and were predominantly targeted against the sequences included in HTI. These findings were confirmed in human lymph node explants exposed to HTI + TriMix mRNA. Intranodal immunizations with HTI mRNA in a mouse model increased antigen-specific cytotoxic T-lymphocyte responses. The addition of TriMix further enhanced cytotoxic responses. CONCLUSION Our results suggest that uptake of mRNA, encoding strong activation signals and a potent HIV antigen, confers a T-cell stimulatory capacity to dendritic cells and enhances their ability to stimulate antigen-specific immunity. These findings may pave the way for therapeutic HIV vaccine strategies based on antigen-encoding RNA to specifically target antigen-presenting cells.
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18
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Coelho AVC, de Moura RR, Kamada AJ, da Silva RC, Guimarães RL, Brandão LAC, de Alencar LCA, Crovella S. Dendritic Cell-Based Immunotherapies to Fight HIV: How Far from a Success Story? A Systematic Review and Meta-Analysis. Int J Mol Sci 2016; 17:ijms17121985. [PMID: 27898045 PMCID: PMC5187785 DOI: 10.3390/ijms17121985] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 11/18/2016] [Accepted: 11/22/2016] [Indexed: 12/30/2022] Open
Abstract
The scientific community still faces the challenge of developing strategies to cure HIV-1. One of these pursued strategies is the development of immunotherapeutic vaccines based on dendritic cells (DCs), pulsed with the virus, that aim to boost HIV-1 specific immune response. We aimed to review DCs-based therapeutic vaccines reports and critically assess evidence to gain insights for the improvement of these strategies. We performed a systematic review, followed by meta-analysis and meta-regression, of clinical trial reports. Twelve studies were selected for meta-analysis. The experimental vaccines had low efficiency, with an overall success rate around 38% (95% confidence interval = 26.7%–51.3%). Protocols differed according to antigen choice, DC culture method, and doses, although multivariate analysis did not show an influence of any of them on overall success rate. The DC-based vaccines elicited at least some immunogenicity, that was sometimes associated with plasmatic viral load transient control. The protocols included both naïve and antiretroviral therapy (ART)-experienced individuals, and used different criteria for assessing vaccine efficacy. Although the vaccines did not work as expected, they are proof of concept that immune responses can be boosted against HIV-1. Protocol standardization and use of auxiliary approaches, such as latent HIV-1 reservoir activation and patient genomics are paramount for fine-tuning future HIV-1 cure strategies.
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Affiliation(s)
- Antonio Victor Campos Coelho
- Department of Genetics, Federal University of Pernambuco, Avenida da Engenharia, Cidade Universitária, Recife 50740-600, Brazil.
| | - Ronald Rodrigues de Moura
- Department of Genetics, Federal University of Pernambuco, Avenida da Engenharia, Cidade Universitária, Recife 50740-600, Brazil.
| | - Anselmo Jiro Kamada
- Department of Genetics, Federal University of Pernambuco, Avenida da Engenharia, Cidade Universitária, Recife 50740-600, Brazil.
| | - Ronaldo Celerino da Silva
- Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco, Avenida da Engenharia, Cidade Universitária, Recife 50740-600, Brazil.
| | - Rafael Lima Guimarães
- Department of Genetics, Federal University of Pernambuco, Avenida da Engenharia, Cidade Universitária, Recife 50740-600, Brazil.
- Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco, Avenida da Engenharia, Cidade Universitária, Recife 50740-600, Brazil.
| | - Lucas André Cavalcanti Brandão
- Laboratory of Immunopathology Keizo Asami (LIKA), Federal University of Pernambuco, Avenida da Engenharia, Cidade Universitária, Recife 50740-600, Brazil.
- Department of Pathology, Federal University of Pernambuco, Avenida Prof. Moraes Rego, 1235, Cidade Universitária, Recife 50670-901, Brazil.
| | - Luiz Cláudio Arraes de Alencar
- Department of Tropical Medicine, Federal University of Pernambuco. Avenida Prof. Moraes Rego, 1235, Cidade Universitária, Recife 50670-901, Brazil.
- Instituto de Medicina Integral Professor Fernando Figueira (IMIP), Boa Vista, Recife 50070-550, Brazil.
| | - Sergio Crovella
- IRCCS Burlo Garofolo and University of Trieste, Via dell' Istria 65/1, Trieste 34137, Italy.
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Pontillo A, Reis EC, da Silva LT, Duarte AJ, Crovella S, Oshiro TM. Dendritic cells used in anti-HIV immunotherapy showed different modulation in anti-HIV genes expression: New concept for the improvement of patients' selection criteria. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.jocit.2016.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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20
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Ellwanger JH, Crovella S, Dos Reis EC, Pontillo A, Chies JAB. Exosomes are possibly used as a tool of immune regulation during the dendritic cell-based immune therapy against HIV-I. Med Hypotheses 2016; 95:67-70. [PMID: 27692171 DOI: 10.1016/j.mehy.2016.09.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 09/14/2016] [Indexed: 02/06/2023]
Abstract
Dendritic cell (DC)-based immune therapy (IT) against HIV showed variable results. It is known that different factors influence host response to DC-IT. Exosomes derived from DC are regulators of the immune system. In this context, here we hypothesize about the role of the DC-derived exosomes on the DC-IT response. Based on data from RT-PCR array genes expression (focused on the TSG101 gene, an exosome marker) and flow cytometry experiments of a DC-IT against HIV-1 clinical trial, we hypothesize that: During the DC-IT exosomes are used as an additional tool for immune system modulation. In addition, we believe that a low release of exosomes can be more beneficial for the DC-IT response than a high release of exosomes. Our data reinforce the concept that exosomes can act as an immune regulatory tool, however not in a generalized manner, but in a highly precise way. Our hypothesis is based in preliminary experimental data, thus, it should be tested using experimental and functional strategies involving a great number of patients. Once the hypothesis confirmed, the immunomodulatory role of the exosomes during DC-IT must be considered as an important factor in the (I) evaluation, (II) modulation, and (III) success of DC-IT against HIV.
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Affiliation(s)
- Joel Henrique Ellwanger
- Laboratório de Imunogenética, Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Genética, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil
| | - Sergio Crovella
- Laboratório de Imunopatologia Keizo Azami, Departamento de Genética, Universidade Federal de Pernambuco (UFPE), Brazil
| | - Edione Cristina Dos Reis
- Laboratório de Imunogenética, Departamento de Imunologia, Instituto de Ciências Biológicas, Universidade de São Paulo (USP), Brazil
| | - Alessandra Pontillo
- Laboratório de Imunogenética, Departamento de Imunologia, Instituto de Ciências Biológicas, Universidade de São Paulo (USP), Brazil
| | - José Artur Bogo Chies
- Laboratório de Imunogenética, Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Genética, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil.
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22
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Wang R, Xu A, Zhang X, Wu J, Freywald A, Xu J, Xiang J. Novel exosome-targeted T-cell-based vaccine counteracts T-cell anergy and converts CTL exhaustion in chronic infection via CD40L signaling through the mTORC1 pathway. Cell Mol Immunol 2016; 14:529-545. [PMID: 27264687 DOI: 10.1038/cmi.2016.23] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 03/25/2016] [Accepted: 03/25/2016] [Indexed: 12/16/2022] Open
Abstract
CD8+ cytotoxic T lymphocyte (CTL) exhaustion is a chief issue for ineffective virus elimination in chronic infectious diseases. We generated novel ovalbumin (OVA)-specific OVA-Texo and HIV-specific Gag-Texo vaccines inducing therapeutic immunity. To assess their therapeutic effect in chronic infection, we developed a new chronic infection model by i.v. infecting C57BL/6 mice with the OVA-expressing adenovirus AdVova. During chronic AdVova infection, mouse CTLs were found to express the inhibitory molecules programmed cell-death protein-1 (PD-1) and lymphocyte-activation gene-3 (LAG-3) and to be functionally exhausted, showing a significant deficiency in T-cell proliferation, IFN-γ production and cytolytic effects. Naive CD8+ T cells upregulated inhibitory PD-ligand 1 (PD-L1), B- and T-lymphocyte attenuator and T-cell anergy-associated molecules (Grail and Itch) while down-regulating the proliferative response upon stimulation in mice with chronic infection. Remarkably, the OVA-Texo vaccine counteracted T-cell anergy and converted CTL exhaustion. The latter was associated with (i) the upregulation of a marker for CTL functionality, diacetylated histone-H3 (diAcH3), (ii) a fourfold increase in CTLs, occurring independent of host DCs or CD4+ T cells, and (iii) the restoration of CTL IFN-γ production and cytotoxicity. In vivo OVA-Texo-stimulated CTLs upregulated the activities of the mTORC1 pathway-related molecules Akt, S6, eIF4E and T-bet, and treatment of the CTLs with an mTORC1 inhibitor, rapamycin, significantly reduced the OVA-Texo-induced increase in CTLs. Interestingly, OVA-Texo-mediated CD40L signaling played a critical role in the observed immunological effects. Importantly, the Gag-Texo vaccine induced Gag-specific therapeutic immunity in chronic infection. Therefore, this study should have a serious impact on the development of new therapeutic vaccines for human immunodeficiency virus (HIV-1) infection.
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Affiliation(s)
- Rong Wang
- Cancer Research Cluster, Saskatchewan Cancer Agency, Saskatoon, Saskatchewan, Canada S7N4H4.,School of Public Health, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5E5
| | - Aizhang Xu
- Cancer Research Cluster, Saskatchewan Cancer Agency, Saskatoon, Saskatchewan, Canada S7N4H4
| | - Xueying Zhang
- Cancer Research Cluster, Saskatchewan Cancer Agency, Saskatoon, Saskatchewan, Canada S7N4H4.,School of Public Health, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5E5
| | - Jie Wu
- Cancer Research Cluster, Saskatchewan Cancer Agency, Saskatoon, Saskatchewan, Canada S7N4H4
| | - Andrew Freywald
- Department of Pathology, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5E5
| | - Jianqing Xu
- Shanghai Public Health Clinical Center, Fudan University, Shanghai 201508, China
| | - Jim Xiang
- Cancer Research Cluster, Saskatchewan Cancer Agency, Saskatoon, Saskatchewan, Canada S7N4H4.,School of Public Health, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5E5.,Department of Oncology, College of Medicine, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5E5
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Routy JP, Mehraj V, Cao W. HIV immunotherapy comes of age: implications for prevention, treatment and cure. Expert Rev Clin Immunol 2015; 12:91-4. [PMID: 26629806 DOI: 10.1586/1744666x.2016.1112269] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Antiretroviral therapy (ART) has reshaped the lives of millions of individuals infected with human immunodeficiency virus (HIV). Patients initiating ART early in the course of infection benefit from a considerable reduction in the risks of acquired immune deficiency syndrome (AIDS) and HIV-related inflammatory events. However, the absence of cure and lifelong requirements of treatment highlight the need of a vaccine and an immunotherapeutic strategy. Like for cancer, a paradigm shift has occurred with the contribution of immune activation and microbial translocation priming aberrant systemic immunity in restricting the ability of the host to mount an effective immune response. The approaches of implementing an effective vaccine to prevent infection and inhibition of immune activation with breakage of viral latency followed by vaccination should lead to an HIV-free generation.
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Affiliation(s)
- Jean-Pierre Routy
- a Division of Hematology and Chronic Viral Illness Service , McGill University Health Centre , Montréal , QC , Canada.,b Research Institute of the McGill University Health Centre: Glen site , Montréal , QC , Canada
| | - Vikram Mehraj
- b Research Institute of the McGill University Health Centre: Glen site , Montréal , QC , Canada
| | - Wei Cao
- b Research Institute of the McGill University Health Centre: Glen site , Montréal , QC , Canada.,c Department of Infectious Diseases, Peking Union Medical , College Hospital , Beijing , China
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Vacas-Córdoba E, Climent N, De La Mata FJ, Plana M, Gómez R, Pion M, García F, Muñoz-Fernández MÁ. Dendrimers as nonviral vectors in dendritic cell-based immunotherapies against human immunodeficiency virus: steps toward their clinical evaluation. Nanomedicine (Lond) 2015; 9:2683-702. [PMID: 25529571 DOI: 10.2217/nnm.14.172] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Although the antiretroviral therapy has led to a long-term control of HIV-1, it does not cure the disease. Therefore, several strategies are being explored to develop an effective HIV vaccine, such as the use of dendritic cells (DCs). DC-based immunotherapies bear different limitations, but one of the most critical point is the antigen loading into DCs. Nanotechnology offers new tools to overcome these constraints. Dendrimers have been proposed as carriers for targeted delivery of HIV antigens in DCs. These nanosystems can release the antigens in a controlled manner leading to a more potent specific immune response. This review focuses on the first steps for clinical development of dendrimers to assess their safety and potential use in DC-based immunotherapies against HIV.
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Affiliation(s)
- Enrique Vacas-Córdoba
- Laboratorio InmunoBiología Molecular, Sección Inmunologia, Hospital General Universitario Gregorio Marañón, Madrid, Spain; Instituto de Investigación Sanitaria del Gregorio Marañón, C/Dr. Esquerdo 46, 28007, Madrid, Spain
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HIV-1 Reservoir Dynamics after Vaccination and Antiretroviral Therapy Interruption Are Associated with Dendritic Cell Vaccine-Induced T Cell Responses. J Virol 2015; 89:9189-99. [PMID: 26109727 DOI: 10.1128/jvi.01062-15] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 06/16/2015] [Indexed: 02/07/2023] Open
Abstract
UNLABELLED HIV-1-specific immune responses induced by a dendritic cell (DC)-based therapeutic vaccine might have some effect on the viral reservoir. Patients on combination antiretroviral therapy (cART) were randomized to receive DCs pulsed with autologous HIV-1 (n = 24) (DC-HIV-1) or nonpulsed DCs (n = 12) (DC-control). We measured the levels of total and integrated HIV-1 DNA in CD4 T cells isolated from these patients at 6 time points: before any cART; before the first cART interruption, which was at 56 weeks before the first immunization to isolate virus for pulsing DCs; before and after vaccinations (VAC1 and VAC2); and at weeks 12 and 48 after the second cART interruption. The vaccinations did not influence HIV-1 DNA levels in vaccinated subjects. After the cART interruption at week 12 postvaccination, while total HIV-1 DNA increased significantly in both arms, integrated HIV-1 DNA did not change in vaccinees (mean of 1.8 log10 to 1.9 copies/10(6) CD4 T cells, P = 0.22) and did increase in controls (mean of 1.8 log10 to 2.1 copies/10(6) CD4 T cells, P = 0.02) (P = 0.03 for the difference between groups). However, this lack of increase of integrated HIV-1 DNA observed in the DC-HIV-1 group was transient, and at week 48 after cART interruption, no differences were observed between the groups. The HIV-1-specific T cell responses at the VAC2 time point were inversely correlated with the total and integrated HIV-1 DNA levels after cART interruption in vaccinees (r [Pearson's correlation coefficient] = -0.69, P = 0.002, and r = -0.82, P < 0.0001, respectively). No correlations were found in controls. HIV-1-specific T cell immune responses elicited by DC therapeutic vaccines drive changes in HIV-1 DNA after vaccination and cART interruption. (This study has been registered at ClinicalTrials.gov under registration no. NCT00402142.) IMPORTANCE There is an intense interest in developing strategies to target HIV-1 reservoirs as they create barriers to curing the disease. The development of therapeutic vaccines aimed at enhancing immune-mediated clearance of virus-producing cells is of high priority. Few therapeutic vaccine clinical trials have investigated the role of therapeutic vaccines as a strategy to safely eliminate or control viral reservoirs. We recently reported that a dendritic cell-based therapeutic vaccine was able to significantly decrease the viral set point in vaccinated patients, with a concomitant increase in HIV-1-specific T cell responses. The HIV-1-specific T cell immune responses elicited by this therapeutic dendritic cell vaccine drove changes in the viral reservoir after vaccinations and significantly delayed the replenishment of integrated HIV-1 DNA after cART interruption. These data help in understanding how an immunization could shift the virus-host balance and are instrumental for better design of strategies to reach a functional cure of HIV-1 infection.
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Brezar V, Ruffin N, Richert L, Surenaud M, Lacabaratz C, Palucka K, Thiébaut R, Banchereau J, Levy Y, Seddiki N. Decreased HIV-specific T-regulatory responses are associated with effective DC-vaccine induced immunity. PLoS Pathog 2015; 11:e1004752. [PMID: 25816350 PMCID: PMC4376642 DOI: 10.1371/journal.ppat.1004752] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 02/18/2015] [Indexed: 11/19/2022] Open
Abstract
The role of regulatory T cells (Tregs) in vaccination has been poorly investigated. We have reported that vaccination with ex vivo-generated dendritic-cells (DC) loaded with HIV-lipopeptides (LIPO-5-DC vaccine) in HIV-infected patients was well tolerated and highly immunogenic. These responses and their relation to viral replication following analytical treatment interruption (ATI) were variable. Here, we investigated whether the presence of HIV-specific Tregs might explain these differences. Co-expression of CD25, CD134, CD39 and FoxP3 was used to delineate both antigen-specific Tregs and effectors T cells (Teffs). Median LIPO-5 specific-CD25+CD134+ polyfunctional T cells increased from 0.1% (IQR 0-0.3) before vaccination (week -4) to 2.1% (IQR 1.1-3.9) at week 16 following 4 immunizations (p=0.001) and were inversely correlated with maximum viral load following ATI (r=-0.77, p=0.001). Vaccinees who displayed lower levels of HIV-specific CD4+CD134+CD25+CD39+FoxP3+ Tregs responded better to the LIPO-5-DC vaccine. After vaccination, the frequency of HIV-specific Tregs decreased (from 69.3 at week -4 to 31.7% at week 16) and inversely correlated with HIV-specific IFN-γ-producing cells (r=-0.64, p=0.002). We show that therapeutic immunization skewed the HIV-specific response from regulatory to effector phenotype which impacts on the magnitude of viral replication following ATI. Highly active antiretroviral therapy (HAART) has considerably decreased AIDS-related mortality and morbidity in recent years. Nevertheless, the search for effective vaccine to combat HIV is in the limelight of modern medical research. In clinical trial settings, T-cell responses are routinely measured following vaccinations. However, the measurement of antigen-specific regulatory T-cell (Tregs) responses is omitted most of the time, since their detection is not possible with the use of standard assays. Following a phase I clinical trial in which autologous dendritic-cells pulsed with HIV-lipopeptides were used to induce T-cell responses, we used a novel assay to detect a whole range of T-helper responses, including Tregs. We report very high levels of HIV-specific Tregs responses in infected patients and interestingly, we observed that the dendritic cell-based vaccine shifted the responses from regulatory to effector phenotype, which impact on the magnitude of viral rebound after treatment interruption.
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Affiliation(s)
- Vedran Brezar
- Equipe 16, Inserm U955, Créteil, France
- Faculté de médecine, Université Paris Est, Créteil, France
- Vaccine Research Institute (VRI), Créteil, France
| | - Nicolas Ruffin
- Equipe 16, Inserm U955, Créteil, France
- Faculté de médecine, Université Paris Est, Créteil, France
- Vaccine Research Institute (VRI), Créteil, France
| | - Laura Richert
- Vaccine Research Institute (VRI), Créteil, France
- Université Bordeaux, ISPED, Centre INSERM U897-Epidemiologie-Biostatistique, Bordeaux, France
- INSERM, ISPED, Centre INSERM U897-Epidemiologie-Biostatistique, Bordeaux, France
- CHU de Bordeaux, Pôle de santé publique, Bordeaux, France
- INRIA SISTM, Talence, France
| | - Mathieu Surenaud
- Equipe 16, Inserm U955, Créteil, France
- Faculté de médecine, Université Paris Est, Créteil, France
- Vaccine Research Institute (VRI), Créteil, France
| | - Christine Lacabaratz
- Equipe 16, Inserm U955, Créteil, France
- Faculté de médecine, Université Paris Est, Créteil, France
- Vaccine Research Institute (VRI), Créteil, France
| | - Karolina Palucka
- Ralph M. Steinman Center for Cancer Vaccines, Baylor Institute for Immunology Research, Baylor Research Institute, Dallas, Texas, United States of America
- The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut, United States of America
| | - Rodolphe Thiébaut
- Vaccine Research Institute (VRI), Créteil, France
- Université Bordeaux, ISPED, Centre INSERM U897-Epidemiologie-Biostatistique, Bordeaux, France
- INSERM, ISPED, Centre INSERM U897-Epidemiologie-Biostatistique, Bordeaux, France
- CHU de Bordeaux, Pôle de santé publique, Bordeaux, France
- INRIA SISTM, Talence, France
| | - Jacques Banchereau
- Equipe 16, Inserm U955, Créteil, France
- Faculté de médecine, Université Paris Est, Créteil, France
- Vaccine Research Institute (VRI), Créteil, France
- Ralph M. Steinman Center for Cancer Vaccines, Baylor Institute for Immunology Research, Baylor Research Institute, Dallas, Texas, United States of America
- The Jackson Laboratory for Genomic Medicine, Farmington, Connecticut, United States of America
| | - Yves Levy
- Equipe 16, Inserm U955, Créteil, France
- Faculté de médecine, Université Paris Est, Créteil, France
- Vaccine Research Institute (VRI), Créteil, France
- Service d'immunologie clinique et maladies infectieuses, AP-HP, Hôpital H. Mondor—A. Chenevier, Créteil, France
| | - Nabila Seddiki
- Equipe 16, Inserm U955, Créteil, France
- Faculté de médecine, Université Paris Est, Créteil, France
- Vaccine Research Institute (VRI), Créteil, France
- * E-mail:
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Miller E, Spadaccia M, Sabado R, Chertova E, Bess J, Trubey CM, Holman RM, Salazar A, Lifson J, Bhardwaj N. Autologous aldrithiol-2-inactivated HIV-1 combined with polyinosinic-polycytidylic acid-poly-L-lysine carboxymethylcellulose as a vaccine platform for therapeutic dendritic cell immunotherapy. Vaccine 2015; 33:388-95. [PMID: 25444812 PMCID: PMC4272884 DOI: 10.1016/j.vaccine.2014.10.054] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 09/08/2014] [Accepted: 10/20/2014] [Indexed: 11/19/2022]
Abstract
Therapeutic interventions for HIV-1 that successfully augment adaptive immunity to promote killing of infected cells may be a requisite component of strategies to reduce latent cellular reservoirs. Adoptive immunotherapies utilizing autologous monocyte-derived dendritic cells (DCs) that have been activated and antigen loaded ex vivo may serve to circumvent defects in DC function that are present during HIV infection in order to enhance adaptive immune responses. Here we detail the clinical preparation of DCs loaded with autologous aldrithiol-2 (AT-2)-inactivated HIV that have been potently activated with the viral mimic, Polyinosinic-polycytidylic acid-poly-l-lysine carboxymethylcellulose (Poly-ICLC). HIV is first propagated from CD4+ T cells from HIV-infected donors and then rendered non-replicative by chemical inactivation with aldrithiol-2 (AT-2), purified, and quantified. Viral inactivation is confirmed through measurement of Tat-regulated β-galactosidase reporter gene expression following infection of TZM-bl cells. In-process testing for sterility, mycoplasma, LPS, adventitious agents, and removal of AT-2 is performed on viral preparations. Autologous DCs are generated and pulsed with autologous AT-2-inactivated virus and simultaneously stimulated with Poly-ICLC to constitute the final DC vaccine product. Phenotypic identity, maturation, and induction of HIV-specific adaptive immune responses are confirmed via flow cytometric analysis of DCs and cocultured autologous CD4+ and CD8+ T cells. Lot release criteria for the DC vaccine have been defined in accordance with Good Manufacturing Practice (GMP) guidelines. The demonstrated feasibility of this approach has resulted in approval by the FDA for investigational use in antiretroviral (ART) suppressed individuals. We discuss how this optimized DC formulation may enhance the quality of anti-HIV adaptive responses beyond what has been previously observed during DC immunotherapy trials for HIV infection.
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Affiliation(s)
- Elizabeth Miller
- Icahn School of Medicine at Mount Sinai, Division of Infectious Diseases, New York, NY, USA.
| | - Meredith Spadaccia
- Icahn School of Medicine at Mount Sinai, Tisch Cancer Institute, New York, NY, USA
| | - Rachel Sabado
- Icahn School of Medicine at Mount Sinai, Tisch Cancer Institute, New York, NY, USA
| | | | - Julian Bess
- AIDS and Cancer Virus Program Inc., Frederick, MD, USA
| | | | - Rose Marie Holman
- Icahn School of Medicine at Mount Sinai, Tisch Cancer Institute, New York, NY, USA
| | | | | | - Nina Bhardwaj
- Icahn School of Medicine at Mount Sinai, Tisch Cancer Institute, New York, NY, USA
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Mehraj V, Jenabian MA, Vyboh K, Routy JP. Immune Suppression by Myeloid Cells in HIV Infection: New Targets for Immunotherapy. Open AIDS J 2014; 8:66-78. [PMID: 25624956 PMCID: PMC4302459 DOI: 10.2174/1874613601408010066] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Revised: 11/11/2014] [Accepted: 11/28/2014] [Indexed: 02/07/2023] Open
Abstract
Over thirty years of extensive research has not yet solved the complexity of HIV pathogenesis leading to a continued need for a successful cure. Recent immunotherapy-based approaches are aimed at controlling the infection by reverting immune dysfunction. Comparatively less appreciated than the role of T cells in the context of HIV infection, the myeloid cells including macrophages monocytes, dendritic cells (DCs) and neutrophils contribute significantly to immune dysfunction. Host restriction factors are cellular proteins expressed in these cells which are circumvented by HIV. Guided by the recent literature, the role of myeloid cells in HIV infection will be discussed highlighting potential targets for immunotherapy. HIV infection, which is mainly characterized by CD4 T cell dysfunction, also manifests in a vicious cycle of events comprising of inflammation and immune activation. Targeting the interaction of programmed death-1 (PD-1), an important regulator of T cell function; with PD-L1 expressed mainly on myeloid cells could bring promising results. Macrophage functional polarization from pro-inflammatory M1 to anti-inflammatory M2 and vice versa has significant implications in viral pathogenesis. Neutrophils, recently discovered low density granular cells, myeloid derived suppressor cells (MDSCs) and yolk sac macrophages provide new avenues of research on HIV pathogenesis and persistence. Recent evidence has also shown significant implications of neutrophil extracellular traps (NETs), antimicrobial peptides and opsonizing antibodies. Further studies aimed to understand and modify myeloid cell restriction mechanisms have the potential to contribute in the future development of more effective anti-HIV interventions that may pave the way to viral eradication.
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Affiliation(s)
- Vikram Mehraj
- Chronic Viral Illness Service, McGill University Health Centre, Montreal, QC, Canada ; Research Institute, McGill University Health Centre, Montreal, QC, Canada
| | - Mohammad-Ali Jenabian
- Département des Sciences Biologiques et Centre de recherche BioMed, Université du Québec à Montréal (UQAM), Montreal, QC, Canada
| | - Kishanda Vyboh
- Chronic Viral Illness Service, McGill University Health Centre, Montreal, QC, Canada ; Research Institute, McGill University Health Centre, Montreal, QC, Canada
| | - Jean-Pierre Routy
- Chronic Viral Illness Service, McGill University Health Centre, Montreal, QC, Canada ; Research Institute, McGill University Health Centre, Montreal, QC, Canada ; Division of Hematology, McGill University Health Centre, Montreal, QC, Canada
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29
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Lévy Y, Thiébaut R, Montes M, Lacabaratz C, Sloan L, King B, Pérusat S, Harrod C, Cobb A, Roberts LK, Surenaud M, Boucherie C, Zurawski S, Delaugerre C, Richert L, Chêne G, Banchereau J, Palucka K. Dendritic cell-based therapeutic vaccine elicits polyfunctional HIV-specific T-cell immunity associated with control of viral load. Eur J Immunol 2014; 44:2802-10. [PMID: 25042008 DOI: 10.1002/eji.201344433] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 05/22/2014] [Accepted: 07/10/2014] [Indexed: 02/02/2023]
Abstract
Efforts aimed at restoring robust immune responses limiting human immunodeficiency virus (HIV)-1 replication therapeutically are warranted. We report that vaccination with dendritic cells generated ex vivo and loaded with HIV lipopeptides in patients (n = 19) on antiretroviral therapy was well tolerated and immunogenic. Vaccination increased: (i) the breadth of the immune response from 1 (1-3) to 4 (2-5) peptide-pool responses/patient (p = 0.009); (ii) the frequency of functional T cells (producing at least two cytokines among IFN-γ, TNF-α, and IL-2) from 0.026 to 0.32% (p = 0.002) and from 0.26 to 0.35% (p = 0.005) for CD4(+) and CD8(+) T cells, respectively; and (iii) the breadth of cytokines secreted by PBMCs upon antigen exposure, including IL-2, IFN-γ, IL-21, IL-17, and IL-13. Fifty percent of patients experienced a maximum of viral load (VL) 1 log10 lower than the other half following antiretroviral treatment interruption. An inverse correlation was found between the maximum of VL and the frequency of polyfunctional CD4(+) T cells (p = 0.007), production of IL-2 (p = 0.006), IFN-γ (p = 0.01), IL-21 (p = 0.006), and IL-13 (p = 0.001). These results suggest an association between vaccine responses and a better control of viral replication. These findings will help in the development of strategies for a functional cure for HIV infection.
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Affiliation(s)
- Yves Lévy
- INSERM, Unite, Creteil, France; Universite Paris-Est, Creteil, France; Assistance Publique-Hôpitaux de Paris (AP-HP), Groupe Henri-Mondor Albert-Chenevier, service d'immunologie clinique, Creteil, France; Vaccine Research Institute (VRI), Creteil, France
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Climent N, Munier S, Piqué N, García F, Pavot V, Primard C, Casanova V, Gatell JM, Verrier B, Gallart T. Loading dendritic cells with PLA-p24 nanoparticles or MVA expressing HIV genes induces HIV-1-specific T cell responses. Vaccine 2014; 32:6266-76. [PMID: 25240755 DOI: 10.1016/j.vaccine.2014.09.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 08/28/2014] [Accepted: 09/05/2014] [Indexed: 02/05/2023]
Abstract
Since recent data suggest that nanoparticles and modified vaccinia ankara (MVA) vectors could play a pivotal role in HIV-1 therapeutics and vaccine design, in an ex vivo model of human monocyte-derived dendritic cells (MDDCs), we compared two different loading strategies with HIV-1 vaccine vehicles, either viral or synthetic derived. We used polylactic acid (PLA) colloidal biodegradable particles, coated with HIV Gag antigens (p24), and MVA expressing Gag (rMVA-gag and rMVA-gag/trans membrane) or Tat, Nef and Rev genes (rMVA tat+rev and rMVA nef). PLA-p24 captured by MDDCs from HIV-1 individuals induced a slight degree of MDDC maturation, cytokine and chemokine secretion and migration towards a gradient of CCL19 chemokine and highly increased HIV-specific CD8(+) T-cell proliferation compared with p24 alone. After complete maturation induction of PLA-p24-pulsed MDDCs, maximal migration towards a gradient of CCL19 chemokine and induction of HIV-specific T-cell proliferation (two-fold higher for CD4(+) than CD8(+)) and cytokine secretion (IFN-γ and IL-2) in the co-culture were observed. Upon exposure to MVA-gag, MDDCs produced cytokines and chemokines and maintained their capacity to migrate to a gradient of CCL19. MDDCs infected with MVA-gag and MVA-gag trans-membrane were able to induce HIV-specific CD8(+) proliferation and secretion of IFN-γ, IL-2, IL-6 and TNF-α. We conclude that both HIV antigens loading strategies (PLA-p24 nanoparticles or MVA expressing HIV genes) induce HIV-1-specific T-cell responses, which are able to kill autologous gag-expressing cells. Thus, they are plausible candidates for the development of anti-HIV vaccines.
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Affiliation(s)
- Núria Climent
- Service of Immunology, Hospital Clínic de Barcelona, Barcelona, Spain; AIDS Research Group, and Catalonian Center for HIV Vaccines (HIVACAT), Barcelona, Spain.
| | - Séverine Munier
- Institut de Biology et Chimie des Protéines, UMR5305, UCBL, 7 Passage du Vercors, 69367 Lyon Cedex 07, France
| | - Núria Piqué
- Department of Microbiology and Parasitology, Pharmacy Faculty, Universitat de Barcelona, Barcelona, Spain
| | - Felipe García
- AIDS Research Group, and Catalonian Center for HIV Vaccines (HIVACAT), Barcelona, Spain; Infectious Diseases and AIDS Unit, Hospital Clínic de Barcelona, Barcelona, Spain
| | - Vincent Pavot
- Institut de Biology et Chimie des Protéines, UMR5305, UCBL, 7 Passage du Vercors, 69367 Lyon Cedex 07, France
| | - Charlotte Primard
- Institut de Biology et Chimie des Protéines, UMR5305, UCBL, 7 Passage du Vercors, 69367 Lyon Cedex 07, France
| | - Victor Casanova
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Barcelona, Barcelona, Spain
| | - José María Gatell
- AIDS Research Group, and Catalonian Center for HIV Vaccines (HIVACAT), Barcelona, Spain; Infectious Diseases and AIDS Unit, Hospital Clínic de Barcelona, Barcelona, Spain
| | - Bernard Verrier
- Institut de Biology et Chimie des Protéines, UMR5305, UCBL, 7 Passage du Vercors, 69367 Lyon Cedex 07, France
| | - Teresa Gallart
- Service of Immunology, Hospital Clínic de Barcelona, Barcelona, Spain; AIDS Research Group, and Catalonian Center for HIV Vaccines (HIVACAT), Barcelona, Spain
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Wang R, Freywald A, Chen Y, Xu J, Tan X, Xiang J. Transgenic 4-1BBL-engineered vaccine stimulates potent Gag-specific therapeutic and long-term immunity via increased priming of CD44(+)CD62L(high) IL-7R(+) CTLs with up- and downregulation of anti- and pro-apoptosis genes. Cell Mol Immunol 2014; 12:456-65. [PMID: 25195511 DOI: 10.1038/cmi.2014.72] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 07/04/2014] [Accepted: 07/08/2014] [Indexed: 02/04/2023] Open
Abstract
Human immunodeficiency virus type-1 (HIV-1)-specific dendritic cell (DC) vaccines have been used in clinical trials. However, they have been found to only induce some degree of immune responses in these studies. We previously demonstrated that the HIV-1 Gag-specific Gag-Texo vaccine stimulated Gag-specific effector CD8(+) cytotoxic T lymphocyte (CTL) responses, leading to completely protective, but very limited, therapeutic immunity. In this study, we constructed a recombinant adenoviral vector, adenovirus (AdV)4-1BBL, which expressed mouse 4-1BB ligand (4-1BBL), and generated transgenic 4-1BBL-engineered OVA-Texo/4-1BBL and Gag-Texo/4-1BBL vaccines by transfecting ovalbumin (OVA)-Texo and Gag-Texo cells with AdV4-1BBL, respectively. We demonstrate that the OVA-specific OVA-Texo/4-1BBL vaccine stimulates more efficient OVA-specific CTL responses (3.26%) compared to OVA-Texo-activated responses (1.98%) in wild-type C57BL/6 mice and the control OVA-Texo/Null vaccine without transgenic 4-1BBL expression, leading to enhanced therapeutic immunity against 6-day established OVA-expressing B16 melanoma BL6-10OVA cells. OVA-Texo/4-1BBL-stimulated CTLs, which have a CD44(+)CD62L(high) IL-7R(+) phenotype, are likely memory CTL precursors, demonstrating prolonged survival and enhanced differentiation into memory CTLs with functional recall responses and long-term immunity against BL6-10OVA melanoma. In addition, we demonstrate that OVA-Texo/4-1BBL-stimulated CTLs up- and downregulate the expression of anti-apoptosis (Bcl2l10, Naip1, Nol3, Pak7 and Tnfrsf11b) and pro-apoptosis (Casp12, Trp63 and Trp73) genes, respectively, by RT(2) Profiler PCR array analysis. Importantly, the Gag-specific Gag-Texo/4-1BBL vaccine also stimulates more efficient Gag-specific therapeutic and long-term immunity against HLA-A2/Gag-expressing B16 melanoma BL6-10Gag/A2 cells than the control Gag-Texo/Null vaccine in transgenic HLA-A2 mice. Taken together, our novel Gag-Texo/4-1BBL vaccine, which is capable of stimulating potent Gag-specific therapeutic and long-term immunity, may represent a new immunotherapeutic vaccine for controlling HIV-1 infection.
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Affiliation(s)
- Rong Wang
- 1] Cancer Research Unit, Saskatchewan Cancer Agency, Saskatoon, Saskatchewan, Canada [2] Department of Oncology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Andrew Freywald
- Department of Pathology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Yue Chen
- Department of Epidemiology and Community Health, University of Ottawa, Canada
| | - Jianqing Xu
- Shanghai Public Health Clinical Center, Fudan University, Shanghai, China
| | - Xin Tan
- School of Life Science, Beijing Institute of Technology, Beijing, China
| | - Jim Xiang
- 1] Cancer Research Unit, Saskatchewan Cancer Agency, Saskatoon, Saskatchewan, Canada [2] Department of Oncology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
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32
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Therapeutic HIV vaccines: prior setbacks, current advances, and future prospects. Vaccine 2014; 32:5540-5. [PMID: 24968157 DOI: 10.1016/j.vaccine.2014.06.066] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 05/30/2014] [Accepted: 06/12/2014] [Indexed: 01/17/2023]
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Freitas-Silva R, Brelaz-de-Castro MC, Pereira VR. Dendritic cell-based approaches in the fight against diseases. Front Immunol 2014; 5:78. [PMID: 24616723 PMCID: PMC3935253 DOI: 10.3389/fimmu.2014.00078] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Accepted: 02/13/2014] [Indexed: 01/09/2023] Open
Affiliation(s)
- Rafael Freitas-Silva
- Department of Natural Sciences, University of Pernambuco , Garanhuns , Brazil ; Department of Immunology, Aggeu Magalhães Research Center, Oswaldo Cruz Foundation , Recife , Brazil
| | | | - Valéria Rêgo Pereira
- Department of Immunology, Aggeu Magalhães Research Center, Oswaldo Cruz Foundation , Recife , Brazil
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Exome analysis of HIV patients submitted to dendritic cells therapeutic vaccine reveals an association of CNOT1 gene with response to the treatment. J Int AIDS Soc 2014; 17:18938. [PMID: 24433985 PMCID: PMC3889223 DOI: 10.7448/ias.17.1.18938] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 11/27/2013] [Indexed: 11/24/2022] Open
Abstract
Introduction With the aim of searching genetic factors associated with the response to an immune treatment based on autologous monocyte-derived dendritic cells pulsed with autologous inactivated HIV, we performed exome analysis by screening more than 240,000 putative functional exonic variants in 18 HIV-positive Brazilian patients that underwent the immune treatment. Methods Exome analysis has been performed using the ILLUMINA Infinium HumanExome BeadChip. zCall algorithm allowed us to recall rare variants. Quality control and SNP-centred analysis were done with GenABEL R package. An in-house implementation of the Wang method permitted gene-centred analysis. Results CCR4-NOT transcription complex, subunit 1 (CNOT1) gene (16q21), showed the strongest association with the modification of the response to the therapeutic vaccine (p=0.00075). CNOT1 SNP rs7188697 A/G was significantly associated with DC treatment response. The presence of a G allele indicated poor response to the therapeutic vaccine (p=0.0031; OR=33.00; CI=1.74–624.66), and the SNP behaved in a dominant model (A/A vs. A/G+G/G p=0.0009; OR=107.66; 95% CI=3.85–3013.31), being the A/G genotype present only in weak/transient responders, conferring susceptibility to poor response to the immune treatment. Discussion CNOT1 is known to be involved in the control of mRNA deadenylation and mRNA decay. Moreover, CNOT1 has been recently described as being involved in the regulation of inflammatory processes mediated by tristetraprolin (TTP). The TTP-CCR4-NOT complex (CNOT1 in the CCR4-NOT complex is the binding site for TTP) has been reported as interfering with HIV replication, through post-transcriptional control. Therefore, we can hypothesize that genetic variation occurring in the CNOT1 gene could impair the TTP-CCR4-NOT complex, thus interfering with HIV replication and/or host immune response. Conclusions Being aware that our findings are exclusive to the 18 patients studied with a need for replication, and that the genetic variant of CNOT1 gene, localized at intron 3, has no known functional effect, we propose a novel potential candidate locus for the modulation of the response to the immune treatment, and open a discussion on the necessity to consider the host genome as another potential variant to be evaluated when designing an immune therapy study.
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Wang R, Xie Y, Zhao T, Tan X, Xu J, Xiang J. HIV-1 Gag-specific exosome-targeted T cell-based vaccine stimulates effector CTL responses leading to therapeutic and long-term immunity against Gag/HLA-A2-expressing B16 melanoma in transgenic HLA-A2 mice. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.trivac.2013.12.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Differentiation of Dendritic Cells from Human Induced Pluripotent Stem Cells. STEM CELLS AND CANCER STEM CELLS, VOLUME 12 2014. [DOI: 10.1007/978-94-017-8032-2_3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Pontillo A, Santillo BT, Duarte AJS, Oshiro TM. Differential inflammasome expression and IL-1β secretion in monocyte-derived dendritic cells differentiated with IL-4 or IFN-α. AIDS Res Ther 2013; 10:35. [PMID: 24373498 PMCID: PMC3892092 DOI: 10.1186/1742-6405-10-35] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Accepted: 12/03/2013] [Indexed: 11/10/2022] Open
Abstract
Background NLRP3-inflammasome activation was evaluated in monocyte-derived dendritic cells (DC) obtained through IL-4 (IL4-DC) or IFN-α (IFN-DC) protocols and pulsed with chemically inactivated HIV-1. Inflammasome’ genes expression and IL-1β secretion were compared in DC isolated from 15 healthy subjects (HC) and 10 HIV-1 infected individuals (HIV+). Findings Whether HIV was able to increased NLRP3-inflammasome genes expression and IL-1β secretion in IL4-DC from HC, the induction of inflammasome appeared significantly reduced in IFN-DC from HC, suggesting a different responsive state of IFN-DC compared to IL4-DC. No inflammasome activation was observed in IL4-DC as well as in IFN-DC derived from HIV + subjects, confirming previous findings on “unresponsive” state of DC derived from HIV + possibly due to chronic inflammatory state of these individuals. Conclusions Our results showed that IFN-α differently modulates inflammasome expression during monocytes-DC in vitro differentiation. These findings could be of interest considering the on-going research about DC manipulation and therapeutic strategies for HIV + involving DC-based immune-vaccines.
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Bernardo D, Mann ER, Al-Hassi HO, English NR, Man R, Lee GH, Ronde E, Landy J, Peake STC, Hart AL, Knight SC. Lost therapeutic potential of monocyte-derived dendritic cells through lost tissue homing: stable restoration of gut specificity with retinoic acid. Clin Exp Immunol 2013; 174:109-19. [PMID: 23607934 PMCID: PMC3784218 DOI: 10.1111/cei.12118] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/05/2013] [Indexed: 01/09/2023] Open
Abstract
Human monocyte-derived dendritic cells (DC) (MoDC) are utilized for immunotherapy. However, in-vitro immunological effects are often not mirrored in vivo. We studied the tissue-homing potential of MoDC. Circulating monocytes and DC expressed different tissue-homing markers and, during in-vitro development of MoDC, homing marker expression was lost resulting in a 'homeless' phenotype. Retinoic acid (RA) induced gut-homing markers (β7 and CCR9) and a regulatory phenotype and function [decreased human leucocyte antigen D-related (HLA-DR) and increased ILT3 and fluorescein isothiocyanate (FITC-dextran uptake) in MoDC]. RA-MoDC were less stimulatory and primed conditioned T cells with a gut-homing profile (β7(+)CLA(-)). Unlike the normal intestinal microenvironment, that from inflamed colon of ulcerative colitis (UC) patients did not induce regulatory properties in MoDC. However, RA-MoDC maintained their regulatory gut-specific properties even in the presence of UC microenvironment. Therefore, MoDC may be ineffectual for immunotherapy because they lack tissue-homing and tissue-imprinting specificity. However, MoDC rehabilitation with gut-homing potential by RA could be useful in promoting immunotherapy in pathologies such as UC.
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Affiliation(s)
- D Bernardo
- Antigen Presentation Research Group, Imperial College London, Northwick Park & St Mark's Campus, UK
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Impact of Autologous Dendritic Cell–Based Immunotherapy (AGS-004) on B- and T-Cell Subset Changes and Immune Activation in HIV-Infected Patients Receiving Antiretroviral Therapy. J Acquir Immune Defic Syndr 2013; 64:345-50. [DOI: 10.1097/qai.0b013e3182a4b9ad] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Pontillo A, Da Silva RC, Moura R, Crovella S. Host genomic HIV restriction factors modulate the response to dendritic cell-based treatment against HIV-1. Hum Vaccin Immunother 2013; 10:512-8. [PMID: 24240316 DOI: 10.4161/hv.27125] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Host genome is still poorly investigated in the context of vaccine or immunotherapy, however recently findings emphasized that it may affect the response to those treatments. In our retrospective study we evaluated the effect of HIV-1 genetic restriction factors on the response to dendritic cell (DC)-based immunotherapy in a Brazilian cohort of HIV positive (HIV+) patients that underwent a phase I clinical trial in 2004. Genomic DNA from 18 HIV+ individuals that underwent DC-based immunotherapy was analyzed for selected polymorphisms known to be associated with susceptibility to HIV-1 infection and/or AIDS progression. Allelic and genotypic distribution of the 22 polymorphisms was evaluated considering the response to the treatment. The rs11884476 SNP in PARD3B resulted associated with good response to immune treatment according to an over-dominant model. Even if functional effect of this variation is still unknown, our data suggested that it could play a role in the control of viral replication. Our findings, being aware of the limitation represented by the small number of subjects analyzed, suggest that genetic factors involved in AIDS progression could affect the response to immunotherapy, reinforcing the idea that deeper investigation on host genetic variations will be fundamental for a rational vaccine development.
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Affiliation(s)
- Alessandra Pontillo
- Department of Immunology; Institute of Biologic Sciences; University of Sao Paulo; Sao Paulo, Brazil
| | - Ronaldo C Da Silva
- Department of Genetics; Federal University of Pernambuco; Recife, Brazil
| | - Ronald Moura
- Department of Genetics; Federal University of Pernambuco; Recife, Brazil
| | - Sergio Crovella
- Department of Genetics; Federal University of Pernambuco; Recife, Brazil
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HIV-1 evolution in patients undergoing immunotherapy with Tat, Rev, and Nef expressing dendritic cells followed by treatment interruption. AIDS 2013; 27:2679-89. [PMID: 24149085 DOI: 10.1097/01.aids.0000433813.67662.92] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES This study aimed to evaluate HIV sequence evolution in whole genes and in CD8 T-cell epitope regions following immunotherapy and subsequent analytical treatment interruption (ATI). A second objective of this study was to analyze associations between vaccine-specific immune responses and epitope mutation rates. DESIGN HIV-1-infected patients on combined antiretroviral therapy (cART) were subjected to immunotherapy by the administration of an autologous dendritic cell-based therapeutic vaccine expressing Tat, Rev, and Nef and subsequent ATI. METHODS HIV-1 genes were amplified and sequenced from plasma RNA obtained before initiation of cART as well as during ATI. Control sequences for virus evolution in untreated HIV-1-infected individuals were obtained from the HIV Sequence Database (Los Alamos). CD8 T-cell epitope regions were defined based on literature data and prediction models. HIV-1-specific immune responses were evaluated to analyze their impact on sequence evolution. RESULTS Viral sequence evolution in the tat, rev, and nef genes of vaccinated patients was similar to that of controls. The number of mutations observed inside and outside CD8 T-cell epitopes was comparable for vaccine-targeted and nontargeted proteins. We found no evidence for an impact of vaccine-induced or enhanced immune responses on the number of mutations inside or outside epitopes. CONCLUSION Therapeutic vaccination of HIV-1-infected patients with a dendritic cell-based vaccine targeting Tat, Rev, and Nef did not affect virus evolution at the whole gene level nor at the CD8 T-cell epitope level.
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Román VRG, Jensen KJ, Jensen SS, Leo-Hansen C, Jespersen S, Té DDS, Rodrigues CM, Janitzek CM, Vinner L, Katzenstein TL, Andersen P, Kromann I, Andreasen LV, Karlsson I, Fomsgaard A. Therapeutic vaccination using cationic liposome-adjuvanted HIV type 1 peptides representing HLA-supertype-restricted subdominant T cell epitopes: safety, immunogenicity, and feasibility in Guinea-Bissau. AIDS Res Hum Retroviruses 2013; 29:1504-12. [PMID: 23634822 DOI: 10.1089/aid.2013.0076] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
We have designed a therapeutic HIV-1 vaccine concept based on peptides together with the adjuvant CAF01. Peptides represented 15 HLA-supertype-restricted subdominant and conserved CD8 T cell epitopes and three CD4 T-helper cell epitopes. In this phase I clinical trial, safety and immunogenicity were assessed in untreated HIV-1-infected individuals in Guinea-Bissau, West Africa. Twenty-three HIV-1-infected individuals were randomized to receive placebo (n=5) or vaccine (n=18). Safety was appraised by clinical follow-up combined with monitoring of biochemistry, hematology, CD4 T cell counts, and HIV-1 viral loads. T cell immunogenicity was monitored longitudinally by interferon (IFN)-γ ELISpot. New vaccine-specific T cell responses were induced in 6/14 vaccinees for whom ELISpot data were valid. CD4 T cell counts and viral loads were stable. The study shows that therapeutic immunization is feasible and safe in Guinea-Bissau and that it is possible to redirect T cell immunity with CAF01-adjuvanted HIV-1 peptide vaccine during untreated HIV-1 infection in some patients. However, relatively few preexisting and vaccine-induced HIV-1 T cell responses to CD8 T cell epitopes were detected against HIV-1 using IFN-γ ELISpot in this chronically infected African population.
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Affiliation(s)
| | | | | | | | | | - David da Silva Té
- Centro de Tratamento Ambulatório (CTA), Hospital Nacional Simão Mendes (HNSM), Bissau, Guinea-Bissau
| | - Candida Medina Rodrigues
- Centro de Tratamento Ambulatório (CTA), Hospital Nacional Simão Mendes (HNSM), Bissau, Guinea-Bissau
| | | | - Lasse Vinner
- Department of Virology, Statens Serum Institut, Copenhagen, Denmark
| | | | - Peter Andersen
- Vaccine Research and Development, Statens Serum Institut, Copenhagen, Denmark
| | - Ingrid Kromann
- Vaccine Research and Development, Statens Serum Institut, Copenhagen, Denmark
| | - Lars Vibe Andreasen
- Vaccine Research and Development, Statens Serum Institut, Copenhagen, Denmark
| | - Ingrid Karlsson
- Department of Virology, Statens Serum Institut, Copenhagen, Denmark
| | - Anders Fomsgaard
- Department of Virology, Statens Serum Institut, Copenhagen, Denmark
- Infectious Disease Research Unit, Clinical Institute, University of Southern Denmark, Odense, Denmark
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García F, Plana M, Climent N, León A, Gatell JM, Gallart T. Dendritic cell based vaccines for HIV infection: the way ahead. Hum Vaccin Immunother 2013; 9:2445-52. [PMID: 23912672 PMCID: PMC3981855 DOI: 10.4161/hv.25876] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 07/24/2013] [Indexed: 01/23/2023] Open
Abstract
Dendritic cells have a central role in HIV infection. On one hand, they are essential to induce strong HIV-specific CD4⁺ helper T-cell responses that are crucial to achieve a sustained and effective HIV-specific CD8⁺ cytotoxic T-lymphocyte able to control HIV replication. On the other hand, DCs contribute to virus dissemination and HIV itself could avoid a correct antigen presentation. As the efficacy of immune therapy and therapeutic vaccines against HIV infection has been modest in the best of cases, it has been hypothesized that ex vivo generated DC therapeutic vaccines aimed to induce effective specific HIV immune responses might overcome some of these problems. In fact, DC-based vaccine clinical trials have yielded the best results in this field. However, despite these encouraging results, functional cure has not been reached with this strategy in any patient. In this Commentary, we discuss new approaches to improve the efficacy and feasibility of this type of therapeutic vaccine.
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Affiliation(s)
- Felipe García
- Hospital Clinic-HIVACAT; IDIBAPS; University of Barcelona; Barcelona, Spain
| | - Montserrat Plana
- Hospital Clinic-HIVACAT; IDIBAPS; University of Barcelona; Barcelona, Spain
| | - Nuria Climent
- Hospital Clinic-HIVACAT; IDIBAPS; University of Barcelona; Barcelona, Spain
| | - Agathe León
- Hospital Clinic-HIVACAT; IDIBAPS; University of Barcelona; Barcelona, Spain
| | - Jose M Gatell
- Hospital Clinic-HIVACAT; IDIBAPS; University of Barcelona; Barcelona, Spain
| | - Teresa Gallart
- Hospital Clinic-HIVACAT; IDIBAPS; University of Barcelona; Barcelona, Spain
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Kløverpris HN, Jackson A, Handley A, Hayes P, Gilmour J, Riddell L, Chen F, Atkins M, Boffito M, Walker BD, Ackland J, Sullivan M, Goulder P. Non-immunogenicity of overlapping gag peptides pulsed on autologous cells after vaccination of HIV infected individuals. PLoS One 2013; 8:e74389. [PMID: 24124451 PMCID: PMC3790804 DOI: 10.1371/journal.pone.0074389] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 07/17/2013] [Indexed: 12/30/2022] Open
Abstract
Background HIV Gag-specific CD4+ and CD8+ T-cell responses are important for HIV immune control. Pulsing overlapping Gag peptides on autologous lymphocytes (OPAL) has proven immunogenic and effective in reducing viral loads in multiple pigtail macaque studies, warranting clinical evaluation. Methodology We performed a phase I, single centre, placebo-controlled, double-blinded and dose-escalating study to evaluate the safety and preliminary immunogenicity of a novel therapeutic vaccine approach ‘OPAL-HIV-Gag(c)’. This vaccine is comprised of 120 15mer peptides, overlapping by 11 amino acids, spanning the HIV Gag C clade sequence proteome, pulsed on white blood cells enriched from whole blood using a closed system, followed by intravenous reinfusion. Patients with undetectable HIV viral loads (<50 copies/ml plasma) on HAART received four administrations at week 0, 4, 8 and 12, and were followed up for 12 weeks post-treatment. Twenty-three people were enrolled in four groups: 12 mg (n = 6), 24 mg (n = 7), 48 mg (n = 2) or matching placebo (n = 8) with 18 immunologically evaluable. T-cell immunogenicity was assessed by IFNγ ELIspot and intracellular cytokine staining (ICS). Results The OPAL-HIV-Gag(c) peptides were antigenic in vitro in 17/17 subjects. After vaccination with OPAL-HIV-Gag(c), 1/6 subjects at 12 mg and 1/6 subjects at 24 mg dose groups had a 2- and 3-fold increase in ELIspot magnitudes from baseline, respectively, of Gag-specific CD8+ T-cells at week 14, compared to 0/6 subjects in the placebo group. No Gag-specific CD4+ T-cell responses or overall change in Rev, Nef, Tat and CMV specific responses were detected. Marked, transient and self-limiting lymphopenia was observed immediately post-vaccination (4 hours) in OPAL-HIV-Gag(c) but not in placebo recipients, with median fall from 1.72 to 0.67 million lymphocytes/mL for active groups (P<0.001), compared to post-placebo from 1.70 to 1.56 lymphocytes/ml (P = 0.16). Conclusion/Significance Despite strong immunogenicity observed in several Macaca nemestrina studies using this approach, OPAL-HIV-Gag(c) was not significantly immunogenic in humans and improved methods of generating high-frequency Gag-specific T-cell responses are required. Name of Registry ClinicalTrials.gov, Registry number: NCT01123915, URL trial registry database: http://www.clinicaltrials.gov/ct2/results?term=OPAL-HIV-1001&Search=Search
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Affiliation(s)
- Henrik N. Kløverpris
- Department of Paediatrics, University of Oxford, Oxford, United Kingdom
- KwaZulu-Natal Research Institute for Tuberculosis and HIV (K-RITH), Nelson R Mandela School of Medicine, University of Kwazulu-Natal, Durban, KwaZulu-Natal, South Africa
- Department of International Health, Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark
- * E-mail: ,
| | - Akil Jackson
- St Stephen's AIDS Trust St Stephen's Centre, Chelsea and Westminster Hospital, London, United Kingdom
| | | | - Peter Hayes
- IAVI Human Immunology Laboratory, Imperial College, London, United Kingdom
| | - Jill Gilmour
- IAVI Human Immunology Laboratory, Imperial College, London, United Kingdom
| | - Lynn Riddell
- Department of Genitourinary Medicine, Northhamptonshire Healthcare National Health Service Trust, Northhampton General Hospital, Cliftonville, Northhampton, United Kingdom
| | - Fabian Chen
- Department of Sexual Health, Royal Berkshire Hospital, Reading, United Kingdom
| | - Mark Atkins
- IAVI Human Immunology Laboratory, Imperial College, London, United Kingdom
| | - Marta Boffito
- St Stephen's AIDS Trust St Stephen's Centre, Chelsea and Westminster Hospital, London, United Kingdom
| | - Bruce D. Walker
- Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology and Harvard, Boston, Massachusetts, United States of America
- Howard Hughes Medical Institute, Maryland, Chevy Chase, Maryland, United States of America
| | - Jim Ackland
- Global Biosolutions, Craigeburn, Victoria, Australia
| | - Mark Sullivan
- Medicines Development, Melbourne, Victoria, Australia
| | - Philip Goulder
- Department of Paediatrics, University of Oxford, Oxford, United Kingdom
- Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology and Harvard, Boston, Massachusetts, United States of America
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Córdoba EV, Pion M, Rasines B, Filippini D, Komber H, Ionov M, Bryszewska M, Appelhans D, Muñoz-Fernández M. Glycodendrimers as new tools in the search for effective anti-HIV DC-based immunotherapies. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2013; 9:972-84. [DOI: 10.1016/j.nano.2013.03.004] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Revised: 02/28/2013] [Accepted: 03/08/2013] [Indexed: 11/29/2022]
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Mohit E, Rafati S. Biological delivery approaches for gene therapy: strategies to potentiate efficacy and enhance specificity. Mol Immunol 2013; 56:599-611. [PMID: 23911418 DOI: 10.1016/j.molimm.2013.06.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Revised: 06/08/2013] [Accepted: 06/09/2013] [Indexed: 12/20/2022]
Abstract
Nowadays many therapeutic agents such as suicide genes, anti-angiogenesis agents, cytokines, chemokines and other therapeutic genes were delivered to cancer cells. Various biological delivery systems have been applied for directing therapeutic gene to target cells. Some of these successful preclinical studies, steps forward to clinical trials and a few are examined in phase III clinical trials. In this review, the biological gene delivery systems were categorized into microorganism and cell based delivery systems. Viral, bacterial, yeast and parasite are among microorganism based delivery systems which are expanded in this review. In cell based approach, different strategies such as tumor cells, stem cells, dendritic cells and sertoli cells will be discussed. Different drawbacks are associated with each delivery system; therefore, many strategies have been improved and potentiated their direction toward specific target cells. Herein, further to the principle of each delivery system, the progresses of these approaches for development of newer generation are discussed.
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Affiliation(s)
- Elham Mohit
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Abstract
Dendritic cells (DCs) are a diverse subset of innate immune cells that are key regulators of the host response to human immunodeficiency virus-1 (HIV-1) infection. HIV-1 directly and indirectly modulates DC function to hinder the formation of effective antiviral immunity and fuel immune activation. This review focuses upon the differential dysregulation of myeloid DCs (mDCs) and plasmacytoid DCs (pDCs) at various stages of HIV-1 infection providing insights into pathogenesis. HIV-1 evades innate immune sensing by mDCs resulting in suboptimal maturation, lending to poor generation of antiviral adaptive responses and contributing to T-regulatory cell (Treg) development. Dependent upon the stage of HIV-1 infection, mDC function is altered in response to Toll-like receptor ligands, which further hinders adaptive immunity and limits feasibility of therapeutic vaccine strategies. pDC interactions with HIV-1 are pleotropic, modulating immune responses on an axis between immunostimulatory and immunosuppressive. pDCs promote immune activation through an altered phenotype of persistent type I interferon secretion and weak antigen presentation capacity. Conversely, HIV-1 stimulates secretion of indolemine 2,3 dioxygenase (IDO) by pDCs resulting in Treg induction. An improved understanding of the roles and underlying mechanisms of DC dysfunction will be valuable to the development of therapeutics to enhance HIV-specific adaptive responses and to dampen immune activation.
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Affiliation(s)
- Elizabeth Miller
- Division of Infectious Diseases, New York University School of Medicine, New York, NY, USA
| | - Nina Bhardwaj
- Cancer Institute, New York University School of Medicine, New York, NY, USA
- Division of Hematology and Oncology, Mount Sinai Medical Center, New York, NY, USA
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Palucka K, Banchereau J. Human dendritic cell subsets in vaccination. Curr Opin Immunol 2013; 25:396-402. [PMID: 23725656 DOI: 10.1016/j.coi.2013.05.001] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 04/18/2013] [Accepted: 05/03/2013] [Indexed: 12/22/2022]
Abstract
Owing to their properties, dendritic cells (DCs) are often called 'nature's adjuvants' and thus have become the natural targets for antigen delivery. DCs provide an essential link between the innate and the adaptive immune responses. DCs are at the center of the immune system owing to their ability to control both tolerance and immunity. DCs are thus key targets for both preventive and therapeutic vaccination. Herein, we will discuss recent progresses in our understanding of DC subsets physiology as it applies to vaccination.
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Affiliation(s)
- Karolina Palucka
- Ralph M. Steinmann Center for Cancer Vaccines, Baylor Institute for Immunology Research, Baylor Research Institute, Dallas, TX, USA.
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Korsholm KS, Karlsson I, Tang ST, Brandt L, Agger EM, Aagaard C, Andersen P, Fomsgaard A. Broadening of the T-cell repertoire to HIV-1 Gag p24 by vaccination of HLA-A2/DR transgenic mice with overlapping peptides in the CAF05 adjuvant. PLoS One 2013; 8:e63575. [PMID: 23691069 PMCID: PMC3656914 DOI: 10.1371/journal.pone.0063575] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 04/04/2013] [Indexed: 12/15/2022] Open
Abstract
Induction of broad T-cell immune responses is regarded as critical for vaccines against the human immunodeficiency virus type 1 (HIV-1) which exhibit high diversity and, therefore, focus has been on inducing cytotoxic CD8 T-cell responses against the more conserved parts of the virus, such as the Gag protein. Herein, we have used the p24 protein which contains a range of conserved T-cell epitopes. We demonstrate that a vaccine of HIV-1 subtype B consensus group-specific antigen (Gag) p24 protein with the CD8-inducing liposomal cationic adjuvant formulation (CAF) 05, induces both CD4 and CD8 T-cell responses in CB6F1 mice. The adjuvanted vaccine also induced functional antigen-specific cytotoxicity in vivo. Furthermore, we found that when fragmenting the Gag p24 protein into overlapping Gag p24 peptides, a broader T-cell epitope specificity was induced in the humanized human leukocyte antigen (HLA)-A2/DR-transgenic mouse model. Thus, combining overlapping Gag p24 peptides with CAF05 appears to be a promising and simple strategy for inducing broader T-cell responses to multiple conserved epitopes which will be relevant for both prophylactic and therapeutic HIV-1 vaccines.
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Affiliation(s)
- Karen S. Korsholm
- Department of Infectious Disease Immunology, Statens Serum Institut, Copenhagen, Denmark
| | - Ingrid Karlsson
- Department of Virology, Statens Serum Institut, Copenhagen, Denmark
| | - Sheila T. Tang
- Department of Virology, Statens Serum Institut, Copenhagen, Denmark
| | - Lea Brandt
- Department of Virology, Statens Serum Institut, Copenhagen, Denmark
| | - Else Marie Agger
- Department of Infectious Disease Immunology, Statens Serum Institut, Copenhagen, Denmark
| | - Claus Aagaard
- Department of Infectious Disease Immunology, Statens Serum Institut, Copenhagen, Denmark
| | - Peter Andersen
- Department of Infectious Disease Immunology, Statens Serum Institut, Copenhagen, Denmark
| | - Anders Fomsgaard
- Department of Virology, Statens Serum Institut, Copenhagen, Denmark
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Cruz LJ, Rueda F, Tacken P, Albericio F, Torensma R, Figdor CG. Enhancing immunogenicity and cross-reactivity of HIV-1 antigens by in vivo targeting to dendritic cells. Nanomedicine (Lond) 2013; 7:1591-610. [PMID: 23148541 DOI: 10.2217/nnm.12.131] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Current retroviral treatments have reduced AIDS to a chronic disease for most patients. However, given drug-related side effects, the emergence of drug-resistant strains and the persistence of viral replication, the development of alternative treatments is a pressing need. This review focuses on recent developments in HIV immunotherapy treatments, with particular emphasis on current vaccination strategies for optimizing the induction of an effective immune response by the recruitment of dendritic cells. In addition to cell-based therapies, targeted strategies aiming to deliver synthetic HIV peptides to dendritic cell-specific receptors in vivo will be discussed.
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Affiliation(s)
- Luis J Cruz
- Department of Tumor Immunology, Nijmegen Centre for Molecular Life Sciences, Radboud University Medical Centre, Nijmegen, The Netherlands.
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