MVA.HIVconsv is in Phase 2 development as a therapeutic vaccine. (MVA.HIVconsv has also been studied for HIV prevention.)
(Compound details obtained from Treatment Action Group website1 and ClinicalTrials.gov2)
What is MVA.HIVconsv?
MVA.HIVconsv is an investigational vaccine that is being studied as a possible strategy to treat people living with HIV.1 MVA.HIVconsv belongs to a group of HIV vaccines called therapeutic HIV vaccines.
To learn how investigational vaccines and drugs are tested during clinical trials, read the HIVinfo What is an Investigational HIV Drug? and HIV and AIDS Clinical Trials fact sheets.
How do therapeutic HIV vaccines work?
A therapeutic HIV vaccine is a type of vaccine that’s designed to improve the body’s immune response to HIV in a person living with HIV.3 Therapeutic vaccines may be able to reduce the amount of HIV in the body and help keep HIV at undetectable levels without the need for the regular use of antiretroviral therapy (ART).4 To learn more, read the HIVinfo What is a Therapeutic HIV Vaccine? fact sheet.
There are several types of therapeutic vaccines that are currently being studied to treat HIV. MVA.HIVconsv belongs to a group of vaccines called viral vector vaccines.1 This type of vaccine delivers pieces of HIV’s DNA into the body’s cells. The body then uses this genetic information to produce an immune system response that can fight the virus.5
In addition to being studied as a therapeutic HIV vaccine, MVA.HIVconsv has also been investigated to see if it can prevent HIV infection in people who do not have the virus.2,6,7 This record focuses on the study of MVA.HIVconsv as a therapeutic vaccine.
Select clinical trials of MVA.HIVconsv
Study Names: (1) BCN01; NCT01712425 and (2) BCN02-Romi; NCT02616874
Status: BCN01 and BCN02-Romi have both been completed.
- The purpose of the BCN01 study was to (1) evaluate the safety of both the MVA.HIVconsv vaccine and another investigational therapeutic HIV vaccine called ChAdV63.HIVconsv, and (2) investigate whether these vaccines could produce an immune response in people with recently diagnosed HIV infection who had viral suppression on ART.
- The purpose of the BCN02-Romi study was to evaluate booster doses of MVA.HIVconsv in participants who had completed the BCN01 trial. MVA.HIVconsv was administered in combination with an investigational latency-reversing agent called romidepsin. The study looked at whether this combination of treatments could reduce the size of the latent HIV reservoir and control viral rebound during an analytical treatment interruption of ART.8,9
Selected Study Results: Results from the BCN01 trial published in EClinicalMedicine (2019) showed that the MVA.HIVconsv and ChAdV63.HIVconsv vaccines were safe. The vaccine regimen demonstrated strong HIV-specific immunogenicity and refocused immune cell responses against highly conserved regions of HIV. (Highly conserved regions of HIV are parts of the virus that change little across most strains.)10 BCN02 trial results published in Frontiers in Immunology (2020) showed that the administration of MVA.HIVconsv booster doses and romidepsin was generally safe. The combined intervention resulted in only a modest reduction in the size of the latent HIV reservoir.11
Study Names: RIVER; NCT02336074
Status: This study is ongoing, but not recruiting participants.
Location: United Kingdom
Purpose: The purpose of this study is to determine whether using a combination of ART, the ChAdV63.HIVconsv and MVA.HIVconsv vaccines, and the investigational latency-reversing agent vorinostat can lead to a greater reduction in the size of the latent HIV reservoir than using ART alone.12
Selected Study Results: Results presented at AIDS 2018 and published in Lancet (2020) showed that the kick and kill strategy of ART plus the ChAdV63.HIVconsv and MVA.HIVconsv vaccines plus vorinostat produced no significant benefit in reducing the latent HIV reservoir as compared to ART alone.13,14
For more details on the studies listed above, see the Health Professional version of this drug summary.
A Phase 1 trial (HIV-CORE 001; NCT01024842) of MVA.HIVconsv was also completed that evaluated the safety of MVA.HIVconsv, its ability to produce an immune response in the body, and its ability to reduce the size of the latent HIV reservoir. Participants were adults on ART who were virologically suppressed. Results are available.15,16
What side effects might MVA.HIVconsv cause?
One goal of HIV research is to identify new drugs that have fewer side effects. The following side effects were observed in some of the studies of MVA.HIVconsv listed above.
BCN01 (NCT01712425); BCN02-Romi (NCT02616874)
In the BCN01 study, the majority of participants experienced side effects, which ranged from mild to moderate in intensity. Most of the side effects related to vaccination were temporary and went away within 3 days. Pain at or near the injection site was more commonly reported with MVA.HIVconsv than with ChAdV63.HIVconsv. The most common systemic side effect after vaccination was a general feeling of discomfort or illness.17
The BCN02-Romi study enrolled a subset of participants who had completed the BCN01 study and evaluated additional doses of MVA.HIVconsv along with romidepsin. The most common side effects related to MVA.HIVconsv were injection site pain and flu-like symptoms (fatigue, headache, muscle pain, and/or low-grade fever). One participant experienced a serious side effect that was possibly related to romidepsin.9,11
In this Phase 2 study, 97% of participants who received ART along with ChAdV63.HIVconsv, MVA.HIVconsv, and vorinostat experienced side effects. Seventy percent of these side effects were mild, 23% were moderate, and 3% were severe in intensity. In the group that only received ART, 73% of participants experienced a side effect, of which 33% were mild, 20% were moderate, and 20% were severe. No serious side effects related to the study vaccines were reported.12,13,18,19
Because MVA.HIVconsv is still being studied, information on possible side effects of the vaccine is not complete. As testing of MVA.HIVconsv continues, additional information on possible side effects will be gathered.
Where can I get more information about clinical trials studying MVA.HIVconsv?
More information about MVA.HIVconsv-related research studies is available from ClinicalTrials.gov. (The ClinicalTrials.gov search can be modified so that you can get results that better match your interests. To learn more about the ClinicalTrials.gov search features, please see How to Search.)
Some clinical trials may be looking for volunteer participants. Your health care provider can help you decide whether participating in a clinical trial is right for you. For more information, visit NIH Clinical Research Trials and You.
- Treatment Action Group website. Research toward a cure trials. Accessed March 23, 2023
- University of Oxford. A Phase I study to evaluate the safety and immunogenicity of simultaneous prime-boost immunisations with candidate HCV and HIV-1 vaccines, AdCh3NSmut1 / ChAdV63.HIVconsv and MVA-NSmut / MVA.HIVconsv, in healthy volunteers. In: ClinicalTrials.gov. Bethesda (MD): National Library of Medicine (US). Registered November 6, 2014. NLM Identifier: NCT02362217. Accessed March 23, 2023
- The History of Vaccines website. The development of HIV vaccines. Accessed March 23, 2023
- Graziani GM, Angel JB. Evaluating the efficacy of therapeutic HIV vaccines through analytical treatment interruptions. J Int AIDS Soc. 2015;18(1):20497. Accessed March 23, 2023
- HIV Vaccine Trials Network website. Types of vaccines. Accessed March 23, 2023
- University of Oxford. A randomized single-blind placebo-controlled study to evaluate the safety and immunogenicity of three candidate HIV-1 vaccines, pSG2.HIVconsv DNA, ChAdV63.HIVconsv and MVA.HIVconsv, administered in combination to healthy HIV 1 uninfected adults. In: ClinicalTrials.gov. Bethesda (MD): National Library of Medicine (US). Registered June 24, 2010. NLM Identifier: NCT01151319. Accessed March 23, 2023
- University College, London. A randomised double-blind, placebo-controlled Phase I/IIa trial to investigate the effect of depletion of serum amyloid P component (SAP) on the immune response to DNA vaccination in healthy male volunteers. In: ClinicalTrials.gov. Bethesda (MD): National Library of Medicine (US). Registered April 29, 2013. NLM Identifier: NCT02425241. Accessed March 23, 2023
- IrsiCaixa. Safety and immunogenicity of ChAdV63.HIVconsv and MVA.HIVconsv candidate HIV-1 vaccines in recently HIV-1 infected individuals with early viral suppression after initiation of antiretroviral therapy (HAART). In: ClinicalTrials.gov. Bethesda (MD): National Library of Medicine (US). Registered October 4, 2012. NLM Identifier: NCT01712425. Accessed March 23, 2023
- IrsiCaixa. An open label Phase I trial to evaluate the safety and effect of HIVconsv vaccines in combination with histone deacetylase inhibitor romidepsin on the viral rebound kinetic after treatment interruption in early treated HIV-1 infected individuals (BCN02-Romi). In: ClinicalTrials.gov. Bethesda (MD): National Library of Medicine (US). Registered November 9, 2015. NLM Identifier: NCT02616874. Accessed March 23, 2023
- Mothe B, Manzardo C, Sanchez-Bernabeu A, et al. Therapeutic vaccination refocuses T-cell responses towards conserved regions of HIV-1 in early treated individuals (BCN 01 study). EClinicalMedicine. 2019;11:65-80. doi:10.1016/j.eclinm.2019.05.009. Accessed March 23, 2023
- Mothe B, Rosás-Umbert M, Coll P, et al. HIVconsv vaccines and romidepsin in early-treated HIV-1-infected individuals: safety, immunogenicity and effect on the viral reservoir (Study BCN02). Front Immunol. 2020;11:823. doi:10.3389/fimmu.2020.00823. Accessed March 23, 2023
- Imperial College London. Research in viral eradication of HIV reservoirs. In: ClinicalTrials.gov. Bethesda (MD): National Library of Medicine (US). Registered on October 23, 2014. NLM Identifier: NCT02336074. Accessed March 23, 2023
- Fidler S. RIVER research in viral eradication of HIV reservoirs: a two-arm (proof of concept) randomised Phase II trial vorinostat plus a prime boost vaccine. Slides presented at: International AIDS Conference; July 23-27, 2018; Amsterdam, Netherlands. Accessed March 23, 2023
- Fidler S, Stöhr W, Pace M, et al. Antiretroviral therapy alone versus antiretroviral therapy with a kick and kill approach, on measures of the HIV reservoir in participants with recent HIV infection (the RIVER trial): a phase 2, randomised trial. Lancet Lond Engl. 2020;395(10227):888-898. doi:10.1016/S0140-6736(19)32990-3. Accessed March 23, 2023
- University of Oxford. HIV-CORE 001 - a randomised placebo-controlled study to evaluate the safety and immunogenicity of a candidate HIV-1 vaccine, MVA.HIVconsv, delivered by intramuscular needle injection to HIV-1 seropositive adult subjects receiving antiretroviral therapy (ART). In: ClinicalTrials.gov. Bethesda (MD): National Library of Medicine (US). Registered December 1, 2009. NLM Identifier: NCT01024842. Accessed March 23, 2023
- Hancock G, Morón-López S, Kopycinski J, et al. Evaluation of the immunogenicity and impact on the latent HIV-1 reservoir of a conserved region vaccine, MVA.HIVconsv, in antiretroviral therapy-treated subjects. J Int AIDS Soc. 2017;20(1). doi:10.7448/IAS.20.1.21171. Accessed March 23, 2023
- Mothe B, Manzardo C, Coll P, et al. Shaping CTL immunodominance with conserved HIV vaccines after early treatment (BCN01). Poster presented at: Conference on Retroviruses and Opportunistic Infections (CROI); February 22-25, 2016; Boston, MA. Poster 320. Accessed March 23, 2023
- Fidler S, Stohr W, Pace M, et al. A randomised controlled trial comparing the impact of antiretroviral therapy (ART) with a “Kick-and-Kill” approach to ART alone on HIV reservoirs in individuals with primary HIV infection (PHI); RIVER trial. Abstract presented at: International AIDS Conference; July 23-27, 2018; Amsterdam, Netherlands. Abstract TUAA0202LB. Accessed March 23, 2023
- Alagaratnam J, Stöhr W, Toombs J, et al. No evidence of neuronal damage as measured by neurofilament light chain in a HIV cure study utilising a kick-and-kill approach. J Virus Erad. 2021;7(3):100056. doi:10.1016/j.jve.2021.100056. Accessed March 23, 2023
Last Reviewed: March 23, 2023