Immune ResponseNCT02933931
Immune Durability After VSV-EBOV Vaccination
An observational study of Immune Response and Vaccination, run by University Hospital, Geneva.
Trial summary
This prospective observational cohort study will follow the roughly 100 adults who received the VSV-ZEBOV vaccine in the Geneva phase 1 randomized controlled trial in 2014-2015 in order to determine their long-term (5-year) immune response to vaccination. Read more about this study
- Who is it for?
- Ages 18 to 68 years
- Conditions the study is for
- Immune Response, Vaccination, Durability
- Type of treatment
- Vaccines
- How many people
- 95 participants
- Where
- No sites listed yet
- Study dates
- Nov 2016to Jan 2020
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 68 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Study participants are adults who were vaccinated according to the protocol of the Geneva phase I VSV-EBOV vaccine trial (NCT02287480) and who are willing and able to provide informed consent.
Who may be able to join
- Participated and was vaccinated with a single injection of VSV-EBOV at a dose of either 3 x 10E5 pfu, 10E7 pfu or 5 x 10E7 pfu in the Geneva phase I VSV-EBOV vaccine trial (NCT02287480).
- Able to provide written, informed consent for this observational study.
Who cannot join
- Received additional vaccination with VSV-EBOV at similar or differing doses.
- Was lost to follow-up in the Geneva phase I VSV-EBOV vaccine trial
About this study
Official title: Long-term Immune Durability After Vaccination With the Vesicular Stomatitis Virus-vectored Zaire Ebola Candidate Vaccine (VSV-EBOV): a Prospective Observational Cohort Study
This prospective observational cohort study will follow the roughly 100 adults who received the VSV-ZEBOV vaccine in the Geneva phase 1 randomized controlled trial in 2014-2015 in order to determine their long-term (5-year) immune response to vaccination.
Read the detailed description
Background: During the Ebola epidemic of 2014-5, there was no proven therapy or prevention available beyond horizontal infection control measures. After the Canadian government donated 800 vials of the vaccine candidate VSV-EBOV to World Health Organization (WHO), the University Hospitals of Geneva agreed to perform a WHO-coordinated phase I/II double-blind, placebo-controlled randomized trial to assess the candidate's safety and immunogenicity healthy adult volunteers. The doses of 10 E7 pfu and 5 x 10 E7 pfu were tested in 35 and 16 volunteers, respectively, before a safety-driven study hold in late 2014. At trial resumption in early 2015, the remaining volunteers (n=51) received 3 x 10 E5 pfu. Thirteen volunteers received placebo. Among vaccinees, early immune responses were impressive, even at the lowest dose of 3 x 10 E5 pfu, and persisted well up to 6 months (last time point assessed). The trial successfully ended 12 months after injection. This prospective observational study will assess immune durability in this group of vaccinees at yearly time points up to five years post-vaccination.
- Conditions
- Immune Response, Vaccination, Durability
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| vaccinated with 5 x 10E7 pfu VSV-ZEBOV | Volunteers vaccinated in 2014 or 2015 with 5 x 10E7 pfu VSV-ZEBOV | |
| vaccinated with 10E7 pfu VSV-ZEBOV | Volunteers vaccinated in 2014 or 2015 with 10E7 pfu VSV-ZEBOV | |
| vaccinated with 3 x 10E5 pfu VSV-ZEBOV | Volunteers vaccinated in 2014 or 2015 with 3 x 10E5 pfu VSV-ZEBOV |
What is being measured
The primary outcome is the main question the study is designed to answer.
EBOV-specific IgG antibody titers measured by ELISA
Measured: 5 years after vaccination
Secondary outcomes (1)
EBOV-specific IgG antibody titers measured by ELISA
Measured: 2, 3, and 4 years after vaccination
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted14 Oct 2016 (estimated)
- Study startNov 2016
- Primary completionJan 2020
- Study completionJan 2020
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (3)Papers the sponsor has linked to this study.
- Other trials for Immune ResponseStudies of the same condition, open and under way.
- More trials run by University Hospital, GenevaThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 95 participants (actual)
Sponsor and investigators
- Lead sponsor
- University Hospital, Geneva
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Siegrist Claire-Anne, University Hospital, Geneva
- Investigators
- Claire-Anne Siegrist, MD, Principal investigator, University of Geneva, Switzerland
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT02933931
- Sponsor's protocol ID
- 2016-00918
- Other IDs
- 2016
- Status last verified
- May 2021
- First submitted
- 11 Oct 2016
- Last updated
- 26 May 2021
- Results posted
- No
- Data monitoring committee
- No
- Individual data sharing
- No
Publications
Agnandji ST, Huttner A, Zinser ME, Njuguna P, Dahlke C, Fernandes JF, Yerly S, Dayer JA, Kraehling V, Kasonta R, Adegnika AA, Altfeld M, Auderset F, Bache EB, Biedenkopf N, Borregaard S, Brosnahan JS, Burrow R, Combescure C, Desmeules J, Eickmann M, Fehling SK, Finckh A, Goncalves AR, Grobusch MP, Hooper J, Jambrecina A, Kabwende AL, Kaya G, Kimani D, Lell B, Lemaitre B, Lohse AW, Massinga-Loembe M, Matthey A, Mordmuller B, Nolting A, Ogwang C, Ramharter M, Schmidt-Chanasit J, Schmiedel S, Silvera P, Stahl FR, Staines HM, Strecker T, Stubbe HC, Tsofa B, Zaki S, Fast P, Moorthy V, Kaiser L, Krishna S, Becker S, Kieny MP, Bejon P, Kremsner PG, Addo MM, Siegrist CA. Phase 1 Trials of rVSV Ebola Vaccine in Africa and Europe. N Engl J Med. 2016 Apr 28;374(17):1647-60. doi: 10.1056/NEJMoa1502924. Epub 2015 Apr 1.
PubMed 25830326Huttner A, Dayer JA, Yerly S, Combescure C, Auderset F, Desmeules J, Eickmann M, Finckh A, Goncalves AR, Hooper JW, Kaya G, Krahling V, Kwilas S, Lemaitre B, Matthey A, Silvera P, Becker S, Fast PE, Moorthy V, Kieny MP, Kaiser L, Siegrist CA; VSV-Ebola Consortium. The effect of dose on the safety and immunogenicity of the VSV Ebola candidate vaccine: a randomised double-blind, placebo-controlled phase 1/2 trial. Lancet Infect Dis. 2015 Oct;15(10):1156-1166. doi: 10.1016/S1473-3099(15)00154-1. Epub 2015 Aug 4.
PubMed 26248510Huttner A, Agnandji ST, Combescure C, Fernandes JF, Bache EB, Kabwende L, Ndungu FM, Brosnahan J, Monath TP, Lemaitre B, Grillet S, Botto M, Engler O, Portmann J, Siegrist D, Bejon P, Silvera P, Kremsner P, Siegrist CA; VEBCON; VSV-EBOVAC; VSV-EBOPLUS Consortia. Determinants of antibody persistence across doses and continents after single-dose rVSV-ZEBOV vaccination for Ebola virus disease: an observational cohort study. Lancet Infect Dis. 2018 Jul;18(7):738-748. doi: 10.1016/S1473-3099(18)30165-8. Epub 2018 Apr 5.
PubMed 29627147
Study at a glance
From the registry record, last updated by the sponsor on 26 May 2021. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Long-term Immune Durability After Vaccination With the Vesicular Stomatitis Virus-vectored Zaire Ebola Candidate Vaccine (VSV-EBOV): a Prospective Observational Cohort Study
- ClinicalTrials.gov ID
- NCT02933931
- Acronym / sponsor ID
- 2016-00918
- Conditions
- Immune Response, Vaccination, Durability
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 95 participants (actual)
- Lead sponsor
- University Hospital, GenevaUniversity, hospital or other
- Study start
- Nov 2016 (actual)
- Primary completion
- Jan 2020 (actual)
- Study completion
- Jan 2020 (actual)
- First posted
- 14 Oct 2016 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This prospective observational cohort study will follow the roughly 100 adults who received the VSV-ZEBOV vaccine in the Geneva phase 1 randomized controlled trial in 2014-2015 in order to determine their long-term (5-year) immune response to vaccination.
Detailed description
Background: During the Ebola epidemic of 2014-5, there was no proven therapy or prevention available beyond horizontal infection control measures. After the Canadian government donated 800 vials of the vaccine candidate VSV-EBOV to World Health Organization (WHO), the University Hospitals of Geneva agreed to perform a WHO-coordinated phase I/II double-blind, placebo-controlled randomized trial to assess the candidate's safety and immunogenicity healthy adult volunteers. The doses of 10 E7 pfu and 5 x 10 E7 pfu were tested in 35 and 16 volunteers, respectively, before a safety-driven study hold in late 2014. At trial resumption in early 2015, the remaining volunteers (n=51) received 3 x 10 E5 pfu. Thirteen volunteers received placebo. Among vaccinees, early immune responses were impressive, even at the lowest dose of 3 x 10 E5 pfu, and persisted well up to 6 months (last time point assessed). The trial successfully ended 12 months after injection. This prospective observational study will assess immune durability in this group of vaccinees at yearly time points up to five years post-vaccination.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| vaccinated with 5 x 10E7 pfu VSV-ZEBOV | – | –Volunteers vaccinated in 2014 or 2015 with 5 x 10E7 pfu VSV-ZEBOV |
| vaccinated with 10E7 pfu VSV-ZEBOV | – | –Volunteers vaccinated in 2014 or 2015 with 10E7 pfu VSV-ZEBOV |
| vaccinated with 3 x 10E5 pfu VSV-ZEBOV | – | –Volunteers vaccinated in 2014 or 2015 with 3 x 10E5 pfu VSV-ZEBOV |
Who may qualify
- Ages
- 18 to 68 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Study participants are adults who were vaccinated according to the protocol of the Geneva phase I VSV-EBOV vaccine trial (NCT02287480) and who are willing and able to provide informed consent.
Key inclusion criteria (2 listed)
- Participated and was vaccinated with a single injection of VSV-EBOV at a dose of either 3 x 10E5 pfu, 10E7 pfu or 5 x 10E7 pfu in the Geneva phase I VSV-EBOV vaccine trial (NCT02287480).
- Able to provide written, informed consent for this observational study.
Key exclusion criteria (2 listed)
- Received additional vaccination with VSV-EBOV at similar or differing doses.
- Was lost to follow-up in the Geneva phase I VSV-EBOV vaccine trial
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
EBOV-specific IgG antibody titers measured by ELISA
Time frame: 5 years after vaccination
1 secondary outcome
EBOV-specific IgG antibody titers measured by ELISA
Time frame: 2, 3, and 4 years after vaccination
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 26 May 2021.
- Background: PubMed 25830326Agnandji ST, Huttner A, Zinser ME, Njuguna P, Dahlke C, Fernandes JF, Yerly S, Dayer JA, Kraehling V, Kasonta R, Adegnika AA, Altfeld M, Auderset F, Bache EB, Biedenkopf N, Borregaard S, Brosnahan JS, Burrow R, Combescure C, Desmeules J, Eickmann M, Fehling SK, Finckh A, Goncalves AR, Grobusch MP, Hooper J, Jambrecina A, Kabwende AL, Kaya G, Kimani D, Lell B, Lemaitre B, Lohse AW, Massinga-Loembe M, Matthey A, Mordmuller B, Nolting A, Ogwang C, Ramharter M, Schmidt-Chanasit J, Schmiedel S, Silvera P, Stahl FR, Staines HM, Strecker T, Stubbe HC, Tsofa B, Zaki S, Fast P, Moorthy V, Kaiser L, Krishna S, Becker S, Kieny MP, Bejon P, Kremsner PG, Addo MM, Siegrist CA. Phase 1 Trials of rVSV Ebola Vaccine in Africa and Europe. N Engl J Med. 2016 Apr 28;374(17):1647-60. doi: 10.1056/NEJMoa1502924. Epub 2015 Apr 1.
- Background: PubMed 26248510Huttner A, Dayer JA, Yerly S, Combescure C, Auderset F, Desmeules J, Eickmann M, Finckh A, Goncalves AR, Hooper JW, Kaya G, Krahling V, Kwilas S, Lemaitre B, Matthey A, Silvera P, Becker S, Fast PE, Moorthy V, Kieny MP, Kaiser L, Siegrist CA; VSV-Ebola Consortium. The effect of dose on the safety and immunogenicity of the VSV Ebola candidate vaccine: a randomised double-blind, placebo-controlled phase 1/2 trial. Lancet Infect Dis. 2015 Oct;15(10):1156-1166. doi: 10.1016/S1473-3099(15)00154-1. Epub 2015 Aug 4.
- Derived from this study: PubMed 29627147Huttner A, Agnandji ST, Combescure C, Fernandes JF, Bache EB, Kabwende L, Ndungu FM, Brosnahan J, Monath TP, Lemaitre B, Grillet S, Botto M, Engler O, Portmann J, Siegrist D, Bejon P, Silvera P, Kremsner P, Siegrist CA; VEBCON; VSV-EBOVAC; VSV-EBOPLUS Consortia. Determinants of antibody persistence across doses and continents after single-dose rVSV-ZEBOV vaccination for Ebola virus disease: an observational cohort study. Lancet Infect Dis. 2018 Jul;18(7):738-748. doi: 10.1016/S1473-3099(18)30165-8. Epub 2018 Apr 5.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Claire-Anne Siegrist, MD principal investigator
University of Geneva, Switzerland
Questions about this trial
What is this clinical trial studying?
An observational study of Immune Response and Vaccination, run by University Hospital, Geneva.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 26 May 2021. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
EBOV-specific IgG antibody titers measured by ELISA (time frame: 5 years after vaccination). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT02933931, which also lists 3 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 26 May 2021.