Denne siden ble automatisk oversatt og nøyaktigheten av oversettelsen er ikke garantert. Vennligst referer til engelsk versjon for en kildetekst.

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.

Studieoversikt

Detaljert beskrivelse

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.

Studietype

Intervensjonell

Registrering (Faktiske)

326

Fase

  • Fase 2
  • Fase 1

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiesteder

      • 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)

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

18 år til 50 år (Voksen)

Tar imot friske frivillige

Ja

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

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.

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Forebygging
  • Tildeling: Randomisert
  • Intervensjonsmodell: Parallell tildeling
  • Masking: Dobbelt

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Eksperimentell: 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
Andre navn:
  • VRC-HIVDNA016-00-VP placebo
Eksperimentell: 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
Andre navn:
  • VRC-HIVDNA016-00-VP placebo
Eksperimentell: 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
Andre navn:
  • VRC-HIVDNA016-00-VP placebo
4 mg administered intramuscularly via injection
4 mg administered intramuscularly via injection
Eksperimentell: 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
Andre navn:
  • VRC-HIVDNA016-00-VP placebo
4 mg administered intramuscularly via injection
4 mg administered intramuscularly via injection
Eksperimentell: 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
Andre navn:
  • VRC-HIVDNA016-00-VP placebo
4 mg administered intramuscularly via injection
Eksperimentell: 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
Andre navn:
  • VRC-HIVDNA016-00-VP placebo
4 mg administered intramuscularly via injection

Hva måler studien?

Primære resultatmål

Resultatmål
Tidsramme
Local reactogenicity signs and symptoms
Tidsramme: Throughout study
Throughout study
Systemic reactogenicity signs and symptoms
Tidsramme: Throughout study
Throughout study
Laboratory measures of safety
Tidsramme: Throughout study
Throughout study
Adverse and serious adverse experiences
Tidsramme: Throughout study
Throughout study
Unfractionated IFN-gamma ELISPOT responses to HIV-1
Tidsramme: 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
Tidsramme: At Day 196
At Day 196

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Etterforskere

  • Studiestol: Merlin Robb, MD, US Military HIV Research Program

Publikasjoner og nyttige lenker

Den som er ansvarlig for å legge inn informasjon om studien leverer frivillig disse publikasjonene. Disse kan handle om alt relatert til studiet.

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart

1. mai 2006

Primær fullføring (Faktiske)

1. juni 2012

Studiet fullført (Faktiske)

1. juni 2012

Datoer for studieregistrering

Først innsendt

22. juli 2005

Først innsendt som oppfylte QC-kriteriene

22. juli 2005

Først lagt ut (Anslag)

26. juli 2005

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

9. november 2021

Siste oppdatering sendt inn som oppfylte QC-kriteriene

4. november 2021

Sist bekreftet

1. juli 2014

Mer informasjon

Denne informasjonen ble hentet direkte fra nettstedet clinicaltrials.gov uten noen endringer. Hvis du har noen forespørsler om å endre, fjerne eller oppdatere studiedetaljene dine, vennligst kontakt register@clinicaltrials.gov. Så snart en endring er implementert på clinicaltrials.gov, vil denne også bli oppdatert automatisk på nettstedet vårt. .

Kliniske studier på HIV-infeksjoner

Kliniske studier på VRC-HIVDNA016-00-VP

3
Abonnere