A Clinical Trial to Assess the Safety and Immunogenicity of New Malaria Vaccine Candidates ChAd63 Pfs25-IMX313 and MVA Pfs25-IMX313

July 14, 2017 updated by: University of Oxford

A Phase Ia Clinical Trial to Assess the Safety, Immunogenicity and Ex-vivo Efficacy of New Plasmodium Falciparum Malaria Vaccine Candidates ChAd63 Pfs-IMX313 Alone and With MVA Pfs25-IMX313

This is a clinical trial in which healthy volunteers will be administered one or two experimental malaria vaccines. ChAd Pfs-IMX313 will either be administered alone or with MVA Pfs25-IMX313 in a prime-boost regime.

All vaccines will be administered intramuscularly.

Group 1 will receive one dose of ChAd63 Pfs25-IMX313 at 5x10^9 vp.

Group 2A will receive one dose of ChAd63 Pfs-IMX313 at 5x10^10 vp.

Group 2B will receive one dose of ChAd63 Pfs-IMX313 at 5x10^10 vp and one dose of MVA Pfs25-IMX313 at 1x10^8 pfu eight weeks later.

Group 2C will receive one dose of ChAd63 Pfs25-IMX313 at 5x10^10 vp and one dose of MVA Pfs25-IMX313 at 2x10^8 pfu eight weeks later.

The study will assess the safety of the vaccinations, and the immune responses to the vaccination. Immune responses are measured by tests on blood samples.

Healthy volunteers will be recruited in Oxford and Southampton, England.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

26

Phase

  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United Kingdom
      • Oxford, United Kingdom, OX3 7LE
        • CCVTM, University of Oxford, Churchill Hospital
      • Southampton, United Kingdom, SO16 6YD
        • NIHR Wellcome Trust Clinical Research Facility

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 50 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

The volunteer must satisfy all the following criteria to be eligible for the study:

  • Healthy adults aged 18 to 50 years
  • Able and willing (in the Investigator's opinion) to comply with all study requirements
  • Willing to allow the investigators to discuss the volunteer's medical history with their General Practitioner
  • For females only, willingness to practice continuous effective contraception (see below) during the study and a negative pregnancy test on the day(s) of screening and vaccination
  • Agreement to refrain from blood donation during the course of the study
  • Provide written informed consent

Exclusion Criteria:

The volunteer may not enter the study if any of the following apply:

  • Participation in another research study involving receipt of an investigational product in the 30 days preceding enrolment, or planned use during the study period
  • Prior receipt of an investigational malaria vaccine or any other investigational vaccine likely to impact on interpretation of the trial data.
  • Administration of immunoglobulins and/or any blood products within the three months preceding the planned administration of the vaccine candidate
  • Any confirmed or suspected immunosuppressive or immunodeficient state, including HIV infection; asplenia; recurrent, severe infections and chronic (more than 14 days) immunosuppressant medication within the past 6 months (inhaled and topical steroids are allowed)
  • History of allergic disease or reactions likely to be exacerbated by any component of the vaccine, e.g. egg products.
  • Any history of anaphylaxis in relation to vaccination
  • Pregnancy, lactation or willingness/intention to become pregnant during the study
  • History of cancer (except basal cell carcinoma of the skin and cervical carcinoma in situ)
  • History of serious psychiatric condition likely to affect participation in the study
  • Any other serious chronic illness requiring hospital specialist supervision
  • Suspected or known current alcohol abuse as defined by an alcohol intake of greater than 42 units every week
  • Suspected or known injecting drug abuse in the 5 years preceding enrolment
  • Seropositive for hepatitis B surface antigen (HBsAg)
  • Seropositive for hepatitis C virus (antibodies to HCV)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Non-Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: Group 1
ChAd63 Pfs25-IMX313 (5x10^9 vp)
Biological: ChAd63 Pfs25-IMX313
Active Comparator: Group 2A
ChAd63 Pfs25-IMX313 (5x10^10 vp)
Biological: ChAd63 Pfs25-IMX313
Active Comparator: Group 2B
ChAd63 Pfs25-IMX313 (5x10^10) and MVA Pfs25-IMX313 (1x10^8 pfu) 8 weeks later
Biological: ChAd63 Pfs25-IMX313
Biological: MVA Pfs25-IMX313
Active Comparator: Group 2C
ChAd63 Pfs25-IMX313 (5x10^10) and MVA Pfs25-IMX313 (2x10^8 pfu) 8 weeks later
Biological: ChAd63 Pfs25-IMX313
Biological: MVA Pfs25-IMX313

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Number of Adverse Events
Time Frame: 8 months
The specific endpoints for safety and reactogenicity will be actively and passively collected data on adverse events.
8 months

Secondary Outcome Measures

Outcome Measure
Time Frame
Immunogenicity of ChAd63 Pfs25-IMX313 when administered to healthy volunteers alone, and with MVA Pfs25-IMX313 in a prime-boost regime.
Time Frame: 8 months
8 months
Ex-vivo efficacy of ChAd63 Pfs25-IMX313 when administered to healthy volunteers alone, and with MVA Pfs25-IMX313 in a prime-boost regime. The functional activity of the vaccine induced antibodies will be tested using membrane-feeding assays.
Time Frame: 8 months
8 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Oxford

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

October 12, 2015

Primary Completion (Actual)

May 25, 2017

Study Completion (Actual)

May 25, 2017

Study Registration Dates

First Submitted

August 7, 2015

First Submitted That Met QC Criteria

August 20, 2015

First Posted (Estimate)

August 25, 2015

Study Record Updates

Last Update Posted (Actual)

July 17, 2017

Last Update Submitted That Met QC Criteria

July 14, 2017

Last Verified

July 1, 2017

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • VAC062

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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