Pan African Clinical Trials Registry

South African Medical Research Council, South African Cochrane Centre
PO Box 19070, Tygerberg, 7505, South Africa
Telephone: +27 21 938 0506 / +27 21 938 0834 Fax: +27 21 938 0836
Email: pactradmin@mrc.ac.za Website: pactr.samrc.ac.za
Trial no.: PACTR202006896481432 Date of Approval: 25/06/2020
Trial Status: Registered in accordance with WHO and ICMJE standards
TRIAL DESCRIPTION
Public title CVIA078
Official scientific title A Phase 2b randomized, open-label, controlled, single center study in Plasmodium falciparum-infected and uninfected adults age 18-55 years old in Kenya to evaluate the efficacy of the delayed, fractional dose RTS,S/AS01E malaria vaccine in subjects treated with artemisinin combination therapy plus primaquine
Brief summary describing the background and objectives of the trial PATH and GlaxoSmithKline (GSK) are committed to developing a malaria vaccine to help reduce the burden of malaria disease in children and contribute to malaria elimination. GSK has developed a candidate vaccine called RTS,S/AS01 which helps the immune system of people vaccinated with RTS,S/AS01 prevent infection with the parasite that causes malaria. The RTS,S/AS01 vaccine has been shown to be safe in multiple studies around the world and is currently beginning a pilot implementation program in children in sub-Saharan Africa. The vaccine has been shown to be effective in adults who have never had malaria when they are challenged with malaria infection in the United States, but has been less effective when given to adults in Africa who have had malaria before. There are probably multiple reasons for this, but one possible reason that is probably very important is that prior infection with malaria or an infection with malaria for long periods, even without symptoms of the disease, can prevent the vaccine from working properly. This study is testing the question that if we treat individuals with antimalarial medications before giving the vaccine, will that make it more effective in people who have a history of malaria infection. The RTS,S/AS01 malaria vaccine will be compared to a rabies vaccine to see if this will improve the effectiveness. We will also be looking at the safety of the vaccine and the response of the immune system to this vaccine. Primary Objective: To assess vaccine efficacy assessed by time to first P. falciparum infection in RTS,S/AS01E vaccinated adults (Group 1) positive for P. falciparum by PCR at baseline and treated to clear parasites compared to adults administered a comparator vaccine (Group 4) positive for P. falciparum by PCR at baseline and treated to clear parasites. Secondary Objectives: Efficacy: To assess vaccine efficacy by time to first P. falciparum infection by PCR in RTS,S/AS01E vaccinated adults (Group 2) negative for P. falciparum at baseline and provided anti-malarial chemo-prophylaxis versus comparator group (Group 5) negative for P. falciparum at baseline and provided anti-malarial chemo-prophylaxis. Safety: • To assess the safety of RTS,S/AS01E in terms of serious adverse events (SAEs) during the whole study period (from Dose 1 to study conclusion) • To assess the safety and reactogenicity of RTS,S/AS01E in terms solicited local and systemic adverse events within 7 days after each vaccination in the first 50 subjects in groups 1 and 2, and in all 35 subjects from Group 3. • To assess the safety of RTS,S/AS01E in terms of unsolicited adverse events within 28 days after each vaccination Immunogenicity: To assess anti-circumsporozoite (CS) antibody titers & avidity, hepatitis B surface antibody (HBsAb) titres, from groups 1, 2 and 3 as detailed in Appendix E. Exploratory Objectives: • To assess in subjects immunized with RTS,S/AS01E the relationship between HLA Class 1 and Class 2 alleles with protection against P. falciparum infection. • To assess anti-rabies titers in subset of subjects at time points from groups 4 and 5 as shown in Appendix E. • To assess cell-mediated immune responses and transcriptomes in Groups 1 – 3. • Other immunological assays evaluating the immune response to CS and HBsAg might be performed.
Type of trial RCT
Acronym (If the trial has an acronym then please provide)
Disease(s) or condition(s) being studied Infections and Infestations
Sub-Disease(s) or condition(s) being studied Malaria
Purpose of the trial Prevention: Vaccines
Anticipated trial start date 01/09/2020
Actual trial start date 04/11/2020
Anticipated date of last follow up 15/11/2022
Actual Last follow-up date 17/08/2022
Anticipated target sample size (number of participants) 619
Actual target sample size (number of participants) 621
Recruitment status Completed
Publication URL N/A
Secondary Ids Issuing authority/Trial register
STUDY DESIGN
Intervention assignment Allocation to intervention If randomised, describe how the allocation sequence was generated Describe how the allocation sequence/code was concealed from the person allocating the participants to the intervention arms Masking If masking / blinding was used
Parallel: different groups receive different interventions at same time during study Randomised Stratified allocation where factors such as age, gender, center, or previous treatment are used in the stratification Allocation was determined by the holder of the sequence who is situated off site Open-label(Masking Not Used)
INTERVENTIONS
Intervention type Intervention name Dose Duration Intervention description Group size Nature of control
Experimental Group RTS S AS01 0.5 ml 0,1,7 months RTS,S=25µg MPL=25µg; QS21=25µg; Liposomes 327
Control Group Rabies vaccine 1.0 mL 0,1,7 months Rabies virus = 2.5 IU 292 Active-Treatment of Control Group
ELIGIBILITY CRITERIA
List inclusion criteria List exclusion criteria Age Category Minimum age Maximum age Gender
In order to be eligible to participate in this study, an individual must meet all of the following criteria: • Provision of signed or thumb printed and dated informed consent form • Stated willingness to comply with all study procedures and availability for the duration of the study • Male or female between 18 and 55 years of age, inclusive • In good general health as evidenced by medical history and clinical examination before entering the study • Ability to take oral medication and be willing to adhere to the medication regimen • For females, she must be of non-childbearing potential or use appropriate measures to prevent pregnancy for 30 days prior to vaccination through 2 months after completion of the vaccine series. Non-childbearing potential means she is surgically sterilized or at least one year post-menopausal. Appropriate measures to prevent pregnancy include abstinence or adequate contraceptive precautions (i.e. intrauterine contraceptive device; oral contraceptives; diaphragm or condom in combination with contraceptive jelly, cream or foam; Norplant or Depo-Provera). Kombewa clinical staff will assist with provision of acceptable birth control for study entry and will discuss with volunteer at screening visit. An individual who meets any of the following criteria will be excluded from participation in this study: • Planned administration/administration of a vaccine not foreseen by the study protocol from within 30 days before the first dose of study vaccine until 30 days after the last dose of study vaccine. In the context of the COVID-19 pandemic, the administration of the COVID-19 vaccine will be allowed as an exception to this exclusion criteria as follows. The study team will work with the participant to attempt to have any COVID-19 vaccine administration occur 30 days or more before or after study vaccinations. When this is not possible, COVID-19 vaccination will be allowed 10 days or more before or after study vaccination. Intervals shorter than 10 days can be allowed on a case-by-case basis in discussion with the sponsor. • Any prior receipt of any rabies vaccine or experimental malaria vaccine. • Confirmed or suspected significant immunosuppressive or immunodeficient condition as determined by the investigator, including clinical stage 3 or 4 human immunodeficiency virus (HIV) infection (Appendix G). • A family history of congenital or hereditary immunodeficiency. • History of allergic reactions, significant IgE-mediated events or anaphylaxis to previous immunizations. • History of any neurologic disorders. • Acute disease (defined as the presence of a moderate or severe illness with or without fever), including acute malaria, at the time of enrolment. All vaccines can be administered to persons with a minor illness, such as diarrhea or mild upper respiratory infection without fever, i.e. Oral temperature < 37.5°C. Individuals excluded with acute disease, including acute malaria, can become eligible again after complete recovery of the illness, including appropriate treatment as applicable, and can be rescreened at a later date. • Acute or chronic, clinically significant pulmonary, cardiovascular (including cardiac arrythmias) , hepatic or renal functional abno Adolescent: 13 Year-18 Year,Adult: 19 Year-44 Year,Middle Aged: 45 Year(s)-64 Year(s) 18 Year(s) 55 Year(s) Both
ETHICS APPROVAL
Has the study received appropriate ethics committee approval Date the study will be submitted for approval Date of approval Name of the ethics committee
Yes 25/02/2020 KEMRI Scientific and Ethics Review Unit
Ethics Committee Address
Street address City Postal code Country
P.O. Box 54840 Nairobi 00200 Kenya
Has the study received appropriate ethics committee approval Date the study will be submitted for approval Date of approval Name of the ethics committee
Yes 18/05/2021 KEMRI Scientific and Ethics Review Unit
Ethics Committee Address
Street address City Postal code Country
P.O.Box 54840 Nairobi 00200 Kenya
Has the study received appropriate ethics committee approval Date the study will be submitted for approval Date of approval Name of the ethics committee
Yes 16/05/2022 KEMRI Scientific and Ethics Review Unit
Ethics Committee Address
Street address City Postal code Country
P.O.Box 54840 Nairobi 00200 Kenya
OUTCOMES
Type of outcome Outcome Timepoint(s) at which outcome measured
Primary Outcome The primary endpoint is defined as the time to first PCR-detectable malaria infection in Groups 1 and 4 during the ADI phase of the study. Active detection of infection phase of the study
Secondary Outcome The secondary endpoint is defined as the time to first PCR-positive malaria infection in Groups 2 and 5 during the ADI phase of the study. Active detection of infection phase of the study
RECRUITMENT CENTRES
Name of recruitment centre Street address City Postal code Country
Kombewa Clinical Research Centre 54 Kisumu 40100 Kenya
FUNDING SOURCES
Name of source Street address City Postal code Country
PATH Rue de Varembe 7, 1202, Geneva Switzerland
SPONSORS
Sponsor level Name Street address City Postal code Country Nature of sponsor
Primary Sponsor PATH Rue de Varembe 7, 1202 Geneva Swaziland Other Collaborative Groups
COLLABORATORS
Name Street address City Postal code Country
GlaxoSmithKline GSK Biologicals Building W23-F0, Avenue Fleming 20, 1300 Wavre Belgium
WRAIR Malaria Serology Reference Center Immunology Core US Military Malaria Research Program, 503 Robert Grant Ave, 3W53, Silver Spring, MD 20910 Silver Spring United States of America
International AIDS Vaccine Initiative Human Immunology Laboratory IAVI HIL Imperial College, 369 Fulham Road, London SW10 9NH, London United Kingdom
Kansas State Veterinary Diagnostic Laboratory College of Veterinary Medicine Kansas State University 2005 Research Park Circle, Room 1014, Manhattan, Kansas 66502, Kansas United States of America
The Human Immune Monitoring Center HIMC Stanford University 291Campus Drive Li Ka Shing Building Stanford CA 94305 5101 Stanford United States of America
Triclinium Clinical Development Pty Ltd Design House, 121 Amkor Road, Centurion 0157, Gauteng South Africa
Precision for Medicine 8425 Precision Way, Frederick, MD 21701, MD United States of America
CONTACT PEOPLE
Role Name Email Phone Street address
Principal Investigator Lucas Tina lucas.tina@usamru-k.org +254720597654 P.O.Box 54
City Postal code Country Position/Affiliation
Kisumu 40100 Kenya KEMRI USAMRD Africa Kenya
Role Name Email Phone Street address
Public Enquiries Lucas Otieno Lucas.tina@usamru-k.org +254720597654 P.O.Box 54
City Postal code Country Position/Affiliation
Kisumu 40100 Kenya KEMRI USAMRD Africa Kenya
Role Name Email Phone Street address
Scientific Enquiries Nathanial Copeland nathanial.k.copeland.mil@health.mil +16306398962 1 Jarrett White Road
City Postal code Country Position/Affiliation
Honolulu United States of America WRAIR
REPORTING
Share IPD Description Additional Document Types Sharing Time Frame Key Access Criteria
Yes Summary study results will be posted to applicable clinical trials registries, including www.ClinicalTrials.gov, within 12 months of the last subject last visit for the collection of data for the primary study endpoints (primary completion date). Statistical Analysis Plan,Study Protocol 12 months of primary completion date not applicable, records on ClinicalTrials.gov are publicly accessible.
URL Results Available Results Summary Result Posting Date First Journal Publication Date
http://www.clinicaltrials.gov Yes 15/09/2024
Result Upload 1: Result Upload 2: Result Upload 3: Result Upload 4: Result Upload 5:
Result - 15/09/2024 Result - 15/09/2024 Result - 15/09/2024 Result - 15/09/2024
Result URL Hyperlinks Link To Protocol
Result URL Hyperlinks
Changes to trial information