A Study to Assess the Safety and Immunogenicity of the Malaria Vaccine, R21, Administered With and Without Matrix-M1

NCT ID: NCT02572388

Last Updated: 2019-11-12

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE1
• Total Enrollment: 31 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2015-10-15
• Study Completion Date: 2017-08-29

Brief Summary

This is a clinical trial in which healthy volunteers will be administered one or two experimental malaria vaccines. The vaccine R21 will either be administered alone or in combination with the adjuvant vaccine Matrix-M1.

All vaccinations will be administered intramuscularly. Each volunteer will receive three vaccinations in total.

There are three different vaccine schedules:

Group 1 will receive 10µg of R21 mixed with 50µg of Matrix-M1 on days 0, 28, and 56.

Group 2 will receive 50µg of R21 on days 0, 28, and 56. .

Group 3 will receive 50µg of R21 mixed with 50µg of Matrix-M1 on days 0, 28, and 56.

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

Healthy adult volunteers will be recruited in Oxford and London, England.

Conditions

Malaria

Study Design

• Allocation Method: NON_RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: PREVENTION
• Blinding Strategy: NONE

Study Groups

Group 1

10µg of R21 mixed with 50µg of Matrix-M on days 0, 28, and 56.

Group Type: ACTIVE_COMPARATOR

R21

Intervention Type: BIOLOGICAL

Matrix-M1

Intervention Type: BIOLOGICAL

Group 2

50µg of R21 on days 0, 28, and 56.

Group Type: ACTIVE_COMPARATOR

R21

Intervention Type: BIOLOGICAL

Group 3

50µg of R21 mixed with 50µg of Matrix-M on days 0, 28, and 56.

Group Type: ACTIVE_COMPARATOR

R21

Intervention Type: BIOLOGICAL

Matrix-M1

Intervention Type: BIOLOGICAL

Group 4

2µg of R21 mixed with 50µg of Matrix-M

Group Type: ACTIVE_COMPARATOR

R21

Intervention Type: BIOLOGICAL

Matrix-M1

Intervention Type: BIOLOGICAL

Interventions

R21

Intervention Type: BIOLOGICAL

Matrix-M1

Intervention Type: BIOLOGICAL

Eligibility Criteria

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
• 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)
• History of clinical malaria (any species)
• Travel to a malaria endemic region during the study period or within the previous six months
• Any clinically significant abnormal finding on screening biochemistry or haematology blood tests or urinalysis
• Any other significant disease, disorder or finding which may significantly increase the risk to the volunteer because of participation in the study, affect the ability of the volunteer to participate in the study or impair interpretation of the study data
• Inability of the study team to contact the volunteer's GP to confirm medical history and safety to participate

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 50 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University of Oxford

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

Centre for Clinical Vaccinology and Tropical Medicine, Churchill Hospital

Oxford, Oxfordshire, United Kingdom

NIHR Wellcome Trust Clinical Research Facility, Hammersmith Hospital

London, , United Kingdom

Countries

United Kingdom

References

Venkatraman N, Tiono AB, Bowyer G, Bellamy DG, Stockdale LK, Powlson J, Collins KA, Coulibaly S, Datoo MS, Silman D, Ouedraogo A, Nebie I, Imoukhuede EB, Brod F, Folegatti P, Dickinson-Craig E, Jamieson S, Bougouma EC, Wright D, Diarra A, Bliss CM, Morter R, Glenn G, Fries LF, Reimer JM, Lovgren-Bengtsson K, Baker M, Poulton I, Moyle S, Berrie E, Green N, Mukhopadhyay E, Viebig NK, Angus B, Lawrie A, Roberts R, Gilbert SC, Lewis DJM, Sirima SB, Ewer KJ, Hill AVS. Evaluation of a novel malaria anti-sporozoite vaccine candidate, R21 in Matrix-M adjuvant, in the UK and Burkina Faso: two phase 1, first-in-human trials. Lancet Microbe. 2025 Mar;6(3):100868. doi: 10.1016/S2666-5247(24)00084-3. Epub 2025 Jan 10.

Reference Type: DERIVED

PMID: 39805302 (View on PubMed)

Provided Documents

Document Type: Study Protocol and Statistical Analysis Plan

View Document

Other Identifiers

VAC053

Identifier Type: -

Identifier Source: org_study_id