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Safety of and Immune Response to an HIV-1 Vaccine (VRC-HIVDNA016-00-VP) and a Vaccine Booster (VRC-HIVADV014-00-VP) in HIV Uninfected East African Adults

A Phase I/II Clinical Trial to Evaluate the Safety and Immunogenicity of a Multiclade HIV-1 DNA Plasmid Vaccine, VRC-HIVDNA016-00-VP, Boosted by a Multiclade HIV-1 Recombinant Adenovirus-5 Vector Vaccine, VRC-HIVADV014-00-VP, in HIV Uninfected Adult Volunteers in East Africa

The purpose of the study is to determine the safety of and immune response to an investigational HIV vaccine, VRC-HIVDNA016-00-VP, and a vaccine booster, VRC-HIVADV014-00-VP, in HIV uninfected adults from Kenya, Tanzania, and Uganda.

Panoramica dello studio

Descrizione dettagliata

The worldwide HIV/AIDS epidemic may only be controlled through development of a safe and effective vaccine that will prevent HIV infection. This study will evaluate the safety and immunogenicity of an experimental adenovirus-vectored multiclade HIV vaccine, VRC-HIVADV014-00-VP, followed with or without a similarly structured DNA plasmid HIV vaccine, VRC-HIVDNA016-00-VP. The DNA in both vaccines codes for proteins from HIV subtypes A, B, and C, which together represent 90% of new HIV infections in the world. HIV uninfected volunteers will be recruited in the East African nations of Kenya, Tanzania, and Uganda.

This study will comprise two parts, 1 and 2. Part 1 will enroll 144 participants who will be randomly assigned to one of four different groups:

  • Group 1A participants will receive a low dose of the adenovirus-vectored HIV vaccine or placebo at study entry.
  • Group 1B participants will receive a higher dose of the adenovirus-vectored HIV vaccine or placebo at study entry.
  • Group 1C will receive the DNA plasmid vaccine or placebo at study entry and Days 28 and 56. They will also receive either a low dose of the adenovirus-vectored HIV vaccine or placebo at Day 168.
  • Group 1D will receive the DNA plasmid vaccine or placebo at study entry and Days 28 and 56. They will also receive either a higher dose of the adenovirus-vectored HIV vaccine or placebo at Day 168.

Enrollment into Part 2 (Groups 2A and 2B) will begin after the completion of the safety data evaluation of Groups 3 and 4 and after Part A has been fully enrolled. Group 2A participants will receive the DNA plasmid vaccine or placebo at study entry and Days 28 and 56. They will also receive either a low dose of the adenovirus-vectored HIV vaccine or placebo at Day 168.

There will be 11 study visits over 14 to 16 months for Parts 1 and 2. All study visits will include a physical exam, medical and medication history, vital signs measurement, lymph node assessment, HIV and pregnancy counseling, and blood and urine collection. A home visit will also occur at study entry. A 3-day diary card to report side effects will be completed by participants at study entry and on Days 28, 56, 168, and 210.

There will be 14 study visits for Groups 3, 4, and 5; these visits will include the same tests and assessments as for Groups 1 and 2.

As per an amendment (dated December 19, 2005), follow-up for this study will be extended. The purpose for this extension is to examine in greater depth the efficacy of the vaccine. Specifically, investigators will be exploring whether there is a persistent immune response in participants who received the vaccine as well as if new or boosted responses to the adenovirus vaccine are persistent. The extended follow-up will last for 2 years with clinic visits every 4 months. During visits blood will be drawn for laboratory tests, including HIV testing. Participants will also be informed of ways to reduce their risk of contracting HIV. Two weeks after each visit, participants will be asked to come to the study site for a short post HIV test counseling visit. There will be a total of 6 visits per year, 3 follow-up visits, and 3 post HIV test counseling visits. There will be no more vaccinations.

Tipo di studio

Interventistico

Iscrizione (Effettivo)

326

Fase

  • Fase 2
  • Fase 1

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Luoghi di studio

      • Kericho, Kenya, 20200
        • Kenya Med. Research Inst./Walter Reed Project, Clinical Research Centre, Off Hospital Road. Kericho
      • Mbeya, Tanzania, 025
        • National Institute for Medical Research (NIMR) - Mbeya Medical Research Center (MMRC) CRS
      • Kampala, Uganda
        • Makerere University Walter Reed Project (MUWRP)

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

Da 18 anni a 50 anni (Adulto)

Accetta volontari sani

Sessi ammissibili allo studio

Tutto

Descrizione

Inclusion Criteria:

  • Good general health
  • Willing to follow all the requirements of the study and available for follow-up for the duration of the study (14 to 16 months)
  • Able and willing to provide informed consent
  • Willing to undergo HIV testing and counseling and willing to receive HIV test results
  • Willing to not engage in high-risk behavior for HIV infection during the study
  • Willing to provide location and be visited at home
  • Willing to be identified with picture identification for study purposes
  • Willing to use acceptable forms of contraception
  • Pregnant women and those with conditions which render phlebotomy volumes hazardous will be allowed to participate using a minimized phlebotomy schedule

Exclusion Criteria:

  • HIV or HBV infection
  • HIV vaccines in prior HIV vaccine trial
  • Immunosuppressive or cytotoxic medications within the 6 months prior to study entry. Participants who have used corticosteroid nasal spray for allergic rhinitis or topical corticosteroids for acute uncomplicated dermatitis are not excluded.
  • Blood products within 120 days prior to study entry
  • Immunoglobulin within 60 days prior to study entry
  • Live attenuated vaccines within 30 days prior to first study vaccine administration
  • Medically indicated subunit or killed vaccines or allergy treatment with antigen injections within 14 days prior to first study vaccine administration
  • Investigational research agents within 30 days prior to first study vaccine administration
  • Current tuberculosis prophylaxis or therapy
  • Participated in high-risk behavior for HIV infection within 6 months prior to study entry. More information on this criterion can be found in the protocol.
  • Serious adverse reactions to vaccines, such as anaphylaxis, hives, respiratory difficulty, angioedema, or abdominal pain
  • Autoimmune disease or immunodeficiency
  • Unstable asthma or asthma requiring emergent or urgent care, hospitalization, intubation, or oral or intravenous corticosteroids during the 2 years prior to study entry
  • Diabetes mellitus type 1 or 2. Patients with gestational diabetes are not excluded.
  • Thyroid disease, including removal of thyroid or disease requiring medication within 3 years prior to study entry
  • Serious angioedema within 3 years prior to study entry or disease requiring medication within 2 years prior to study entry
  • Uncontrolled hypertension
  • Bleeding disorder
  • Active syphilis
  • Active cancer OR treated cancer that may recur during the duration of the study
  • Seizure disorder. Participants who have had fever-related seizures prior to age 2 are not excluded.
  • Absence of spleen OR partial or complete lack of splenic function
  • Psychiatric condition that may interfere with the study, including past or present psychoses, bipolar disorder, or suicidal attempts
  • Any medical, psychiatric, or social condition that, in the opinion of the investigator, may interfere with the study
  • Any occupational or other responsibility that, in the opinion of the investigator, may interfere with the study
  • Pregnancy, breastfeeding, or plan to become pregnant
  • Any occupational or other responsibility that, in the opinion of the investigator, may interfere with the study
  • Incapacitating illness precluding clinic visits
  • Unable to provide informed consent
  • Prisoners will not be enrolled while incarcerated and if enrolled prior to incarceration, will not be followed while in confinement. Re-consent will not be required upon release from prison.

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Prevenzione
  • Assegnazione: Randomizzato
  • Modello interventistico: Assegnazione parallela
  • Mascheramento: Doppio

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Sperimentale: 1A
Participants will receive a low dose of the adenovirus-vectored HIV vaccine or placebo at study entry
1x10^11 per unit vaccine administered intramuscularly via Bioinjector
Administered intramuscularly via Bioinjector
Altri nomi:
  • VRC-HIVDNA016-00-VP placebo
Sperimentale: 1B
Participants will receive a higher dose of the adenovirus-vectored HIV vaccine or placebo at study entry
1x10^11 per unit vaccine administered intramuscularly via Bioinjector
Administered intramuscularly via Bioinjector
Altri nomi:
  • VRC-HIVDNA016-00-VP placebo
Sperimentale: 1C
Participants will receive the DNA plasmid vaccine or placebo at study entry and Days 28 and 56. They will also receive either a low dose of the adenovirus-vectored HIV vaccine or placebo at Day 168.
1x10^11 per unit vaccine administered intramuscularly via Bioinjector
Administered intramuscularly via Bioinjector
Altri nomi:
  • VRC-HIVDNA016-00-VP placebo
4 mg administered intramuscularly via injection
4 mg administered intramuscularly via injection
Sperimentale: 1D
Participants will receive the DNA plasmid vaccine or placebo at study entry and Days 28 and 56. They will also receive either a higher dose of the adenovirus-vectored HIV vaccine or placebo at Day 168.
1x10^11 per unit vaccine administered intramuscularly via Bioinjector
Administered intramuscularly via Bioinjector
Altri nomi:
  • VRC-HIVDNA016-00-VP placebo
4 mg administered intramuscularly via injection
4 mg administered intramuscularly via injection
Sperimentale: 2A
Participants will receive the DNA plasmid vaccine at study entry and Days 28 and 56. They will also receive a low dose of the adenovirus-vectored HIV vaccine at Day 168.
1x10^11 per unit vaccine administered intramuscularly via Bioinjector
Administered intramuscularly via Bioinjector
Altri nomi:
  • VRC-HIVDNA016-00-VP placebo
4 mg administered intramuscularly via injection
Sperimentale: 2B
Participants will receive the DNA plasmid vaccine placebo at study entry and Days 28 and 56. They will also receive a the adenovirus-vectored HIV vaccine placebo at Day 168.
Administered intramuscularly via Bioinjector
Altri nomi:
  • VRC-HIVDNA016-00-VP placebo
4 mg administered intramuscularly via injection

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Lasso di tempo
Local reactogenicity signs and symptoms
Lasso di tempo: Throughout study
Throughout study
Systemic reactogenicity signs and symptoms
Lasso di tempo: Throughout study
Throughout study
Laboratory measures of safety
Lasso di tempo: Throughout study
Throughout study
Adverse and serious adverse experiences
Lasso di tempo: Throughout study
Throughout study
Unfractionated IFN-gamma ELISPOT responses to HIV-1
Lasso di tempo: At Day 196
At Day 196
CD4+ and CD8+ T cell responses to HIV-1, as measured by flow cytometry-based intracellular cytokine staining (ICS) assay
Lasso di tempo: At Day 196
At Day 196

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Investigatori

  • Cattedra di studio: Merlin Robb, MD, US Military HIV Research Program

Pubblicazioni e link utili

La persona responsabile dell'inserimento delle informazioni sullo studio fornisce volontariamente queste pubblicazioni. Questi possono riguardare qualsiasi cosa relativa allo studio.

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio

1 maggio 2006

Completamento primario (Effettivo)

1 giugno 2012

Completamento dello studio (Effettivo)

1 giugno 2012

Date di iscrizione allo studio

Primo inviato

22 luglio 2005

Primo inviato che soddisfa i criteri di controllo qualità

22 luglio 2005

Primo Inserito (Stima)

26 luglio 2005

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

9 novembre 2021

Ultimo aggiornamento inviato che soddisfa i criteri QC

4 novembre 2021

Ultimo verificato

1 luglio 2014

Maggiori informazioni

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .

Prove cliniche su Infezioni da HIV

Prove cliniche su VRC-HIVDNA016-00-VP

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