Safety and Immunogenicity of Apical Membrane Antigen 1 (PfAMA-1-FVO[25-545])

NCT ID: NCT00431808

Last Updated: 2008-04-03

Basic Information

• Recruitment Status: UNKNOWN
• Clinical Phase: PHASE1
• Total Enrollment: 40 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2007-05-31
• Study Completion Date: 2008-06-30

Brief Summary

This study will be the first time that the candidate malaria vaccine Apical Membrane Antigen 1 (PfAMA-1-FVO[25-545]) will be tested in malaria endemic populations. The phase Ib study will include adults who will be randomly allocated to either receive the malaria vaccine or the vaccine against Tetanus. Each participant will receive 3 immunizations, without the clinical investigators or the participants themselves knowing what has been given. They will then be follow-up up for immediate reactions to vaccination, and also over a longer term of one year. Blood will be taken to evaluate the biological safety parameters and also immune responses.

Detailed Description

This will be a randomized controlled trial to evaluate the Safety and Immunogenicity of recombinant pichia pastoris blood stage malaria vaccine Apical Membrane Antigen 1 (PfAMA-1-FVO[25-545]) versus tetanus toxoid, in healthy Malian adults in Bandiagara.

A phase Ia trial is currently ongoing and its interim results will be used to select the best dose/adjuvant combination to be brought to Africa. The trial is evaluating safety and immunogenicity of AMA-1 (10 µg or 50 µg) adjuvanted with aluminum hydroxide or Montanide ISA 720, or ASO2.

• Primary objective:

• To evaluate the safety of one dose of AMA-1 (10 µg or 50 µg) adjuvanted with aluminum hydroxide or Montanide ISA 720, or ASO2, given at D0, D28 and D56 in healthy Malian adults.
• Secondary Objectives:

• To assess the humoral response to the vaccine antigen by measuring the variation in the level of IgG and its ability to recognize the native protein on merozoites.
• To assess the cellular immune response by measuring the T cell proliferation and cytokine production following in vitro stimulation with the vaccine antigen.

The primary immunizations will be administered on days 0, 28 and a boost given at day 56. The participants will be followed up actively during the vaccination phase, and passively for one another 9 months. The will be 19 scheduled clinic visits and following will the the schedule for obtaining serology data D-28, D0, D28, D56, D84, D140 and D365

• The primary evaluation will include the following:

• Solicited adverse events measured from day 0 to day 7 after each dose;
• Unsolicited adverse events measured up to one month after each dose;
• Serious Adverse Event (SAE) measured during the 12 months of study duration.
• Biological safety: two and four weeks after each vaccination, and thereafter every 12 weeks, in reference with the baseline before the first dose, by measuring the following RBC, hemoglobin, hematocrit, MCV, MCH, MCHC, platelets, WBC with differential counts, potassium, sodium, ASAT, ALAT, total bilirubin, alkaline phosphatase, γGT, creatinin.
• Secondary evaluation criteria:

• The humoral response to the vaccine antigen: assessed by measuring the level of IgG by ELISA.
• An IFA for at least two parasite strains will be used to verify that the antibodies elicited by the vaccine recognize the native protein on merozoites
• Statistical methods:

Descriptive methods shall be employed to evaluate the above criteria.

Conditions

Malaria

Keywords

Malaria; vaccine; Apical Membrane Antigene; Mali; Adults

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: PREVENTION
• Blinding Strategy: QUADRUPLE

Study Groups

I, AMA1 vaccine

20 volunteers will receive 3 doses of the vaccine

Group Type: EXPERIMENTAL

Malaria vaccine AMA1 (PfAMA-1-FVO[25-545]

Intervention Type: BIOLOGICAL

3 doses of AMA 1 vaccine

AMA1

Intervention Type: BIOLOGICAL

50 micrograms of AMA1

Interventions

Malaria vaccine AMA1 (PfAMA-1-FVO[25-545]

3 doses of AMA 1 vaccine

Intervention Type: BIOLOGICAL

AMA1

50 micrograms of AMA1

Intervention Type: BIOLOGICAL

Eligibility Criteria

Inclusion Criteria

• Age 18-55 years inclusive at the time of screening
• Residing in Bandiagara for the duration of the study
• Separate written informed consent obtained before screening and study start, respectively
• Available to participate in follow-up for the duration of study (14 months)
• General good health based on history and clinical examination
• Willingness not to become pregnant during the first five months of the study for female participants

Exclusion Criteria

• Previous vaccination with a investigational vaccine or a rabies vaccine
• Use of a investigational or non-registered drug or vaccine other than the study vaccine(s) within 30 days preceding the first study immunization, or planned use up to 30 days after the third immunization
• Chronic administration (defined as more than 14 days) of immunosuppressants or other immune-modifying drugs within six months prior to the first immunization. This includes any dose level of oral steroids or inhaled steroids, but not topical steroids
• Confirmed or suspected immunosuppressive or immunodeficient condition, including human immunodeficiency virus (HIV) infection
• Confirmed or suspected autoimmune disease
• History of allergic reactions or anaphylaxis to immunizations or to any vaccine component
• History of serious allergic reactions to any substance, requiring hospitalization or emergent medical care
• History of allergy to vaccines components
• History of splenectomy
• Laboratory evidence of liver disease (alanine aminotransferase [ALT] greater than 1.25 times the upper limit of normal of the testing laboratory).
• Laboratory evidence of renal disease (serum creatinine greater than the upper limit of normal of the testing laboratory, or more than trace protein or blood on urine dipstick testing).
• Laboratory evidence of hematologic disease (absolute leukocyte count <4000/mm3 or >14,500/mm3, absolute lymphocyte count <1500/mm3, platelet count <120,000/mm3, or hemoglobin <10.0 g/dL).
• Administration of immunoglobulins and/or any blood products within the three months preceding the first study immunization or planned administration during the study period.
• Simultaneous participation in any other interventional clinical trial
• Acute or chronic pulmonary, cardiovascular, hepatic, renal or neurological condition, malnutrition, or any other clinical findings that in the opinion of the PI may increase the risk of participating in the study
• Other condition that in the opinion of the PI would jeopardize the safety or rights of a participant in the trial or would render the participant unable to comply with the protocol

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 55 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

African Malaria Network Trust

NETWORK

Sponsor Role: lead

Responsible Party

African Malaria Network Trust

Principal Investigators

Mahamadou A Thera, MD MPH

Role: PRINCIPAL_INVESTIGATOR

Malaria Research and Training Center

Locations

Malaria Research and Training Center

Bandiagara, , Mali

Site Status: RECRUITING

Countries

Mali

Facility Contacts

Mahamadou A Thera, MD MPH

Role: primary

Ogobara K Doumbo, MD PhD

Role: backup

References

Thera MA, Coulibaly D, Kone AK, Guindo AB, Traore K, Sall AH, Diarra I, Daou M, Traore IM, Tolo Y, Sissoko M, Niangaly A, Arama C, Baby M, Kouriba B, Sissoko MS, Sagara I, Toure OB, Dolo A, Diallo DA, Remarque E, Chilengi R, Noor R, Sesay S, Thomas A, Kocken CH, Faber BW, Imoukhuede EB, Leroy O, Doumbo OK. Phase 1 randomized controlled trial to evaluate the safety and immunogenicity of recombinant Pichia pastoris-expressed Plasmodium falciparum apical membrane antigen 1 (PfAMA1-FVO [25-545]) in healthy Malian adults in Bandiagara. Malar J. 2016 Aug 30;15(1):442. doi: 10.1186/s12936-016-1466-4.

Reference Type: DERIVED

PMID: 27577237 (View on PubMed)

Other Identifiers

MU-08

Identifier Type: -

Identifier Source: secondary_id

AMA1_02_07

Identifier Type: -

Identifier Source: org_study_id