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NCT05135273

Study of the Transmission-Blocking Vaccine Pfs230D1-EPA/Matrix-M Against Malaria in Adults in Mali

Completed Phase 1 Results posted Last updated 6 May 2024
What this trial tests

Phase 1 trial testing Pfs230D1-EPA/Matrix-M Vaccine in Malaria,Falciparum in 80 participants. Completed in 21 June 2023.

Timeline
22 October 2021
Primary endpoint
17 February 2023
21 June 2023

Quick facts

Lead sponsorNational Institute of Allergy and Infectious Diseases (NIAID)
PhasePhase 1
StatusCompleted
Study typeINTERVENTIONAL
Allocationrandomized
Designparallel
Maskingdouble
Primary purposeprevention
Enrollment80
Start date22 October 2021
Primary completion17 February 2023
Estimated completion21 June 2023
Sites1 location across Mali

Drugs / interventions tested

Conditions studied

Sponsor

National Institute of Allergy and Infectious Diseases (NIAID)

Who can join

Adults 18 to 50, any sex, with Malaria,Falciparum. Patients with the condition only — healthy volunteers not accepted.

Results — posted to ClinicalTrials.gov

Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.

Number of Local and Systemic Adverse Events (AEs) to Assess the Safety of the Study Drug Primary · Adverse Events monitored/assessed for 7 days after each vaccination at days 1, 29, and 57; All-Cause Mortality monitored/assessed through 14 months

The analyses included only subjects who received at least one vaccination

GroupValue95% CI
12.5 µg Dose (Arm 1a Pilot)34
20 µg Dose (Arm 1b Pilot)24
40 µg Dose (Arm 1c Pilot)23
Rabies Comparator (Arm 1d Pilot)16
12.5 µg (Arm 2a Main)45
20 µg Dose (Arm 2b Main)60
40 µg Dose (Arm 2c Main)58
Rabies Comparator (Arm 2d Main)39
Number of Local and Systemic Serious Adverse Events (SAEs) to Assess the Safety of the Study Drug Primary · Serious Adverse Events monitored/assessed for 7 days after each vaccination at days 1, 29, and 57; All-Cause Mortality monitored/assessed through 14 months
GroupValue95% CI
12.5 µg Dose (Arm 1a Pilot)1
20 µg Dose (Arm 1b Pilot)0
40 µg Dose (Arm 1c Pilot)0
Rabies Comparator (Arm 1d Pilot)0
12.5 µg (Arm 2a Main)0
20 µg Dose (Arm 2b Main)0
40 µg Dose (Arm 2c Main)0
Rabies Comparator (Arm 2d Main)0

Adverse events — posted to ClinicalTrials.gov

Time frame: Adverse Events monitored/assessed for 7 days after each vaccination at days 1, 29, and 57; All-Cause Mortality monitored/assessed through 14 months. Reporting threshold: 0%. Adverse-event reports describe events observed during the trial — not all are caused by the drug.

12.5 µg Dose (Arm 1a Pilot)
Serious: 1/5 (20%)
Deaths: 0/5
20 µg Dose (Arm 1b Pilot)
Serious: 0/5 (0%)
Deaths: 0/5
40 µg Dose (Arm 1c Pilot)
Serious: 0/5 (0%)
Deaths: 0/5
Rabies Comparator (Arm 1d Pilot)
Serious: 0/4 (0%)
Deaths: 0/4
12.5 µg (Arm 2a Main)
Serious: 0/14 (0%)
Deaths: 0/14
20 µg Dose (Arm 2b Main)
Serious: 0/14 (0%)
Deaths: 0/14
40 µg Dose (Arm 2c Main)
Serious: 0/15 (0%)
Deaths: 0/15
Rabies Comparator (Arm 2d Main)
Serious: 0/16 (0%)
Deaths: 0/16

Serious adverse events (1 terms)

ReactionSystem12.5 µg Dose (Arm 1a Pilot)20 µg Dose (Arm 1b Pilot)40 µg Dose (Arm 1c Pilot)Rabies Comparator (Arm 1d …12.5 µg (Arm 2a Main)20 µg Dose (Arm 2b Main)40 µg Dose (Arm 2c Main)Rabies Comparator (Arm 2d …
HaemorrhoidsGastrointestinal disorders
Other adverse events (42 terms — click to expand)

ReactionSystem12.5 µg Dose (Arm 1a Pilot)20 µg Dose (Arm 1b Pilot)40 µg Dose (Arm 1c Pilot)Rabies Comparator (Arm 1d …12.5 µg (Arm 2a Main)20 µg Dose (Arm 2b Main)40 µg Dose (Arm 2c Main)Rabies Comparator (Arm 2d …
HeadacheGeneral disorders
Injection site painMusculoskeletal and connective tissue disorders
RhinitisRespiratory, thoracic and mediastinal disorders
MalariaInfections and infestations
NeutropeniaBlood and lymphatic system disorders
LeukopeniaBlood and lymphatic system disorders
MyalgiaMusculoskeletal and connective tissue disorders
ThrombocytopeniaBlood and lymphatic system disorders
Abdominal PainGastrointestinal disorders
CoughRespiratory, thoracic and mediastinal disorders
DizzinessEar and labyrinth disorders
FatigueGeneral disorders
GastroenteritisGastrointestinal disorders
NasopharyngitisRespiratory, thoracic and mediastinal disorders
PharyngitisRespiratory, thoracic and mediastinal disorders
PyrexiaGeneral disorders
AsthmaRespiratory, thoracic and mediastinal disorders
Back painMusculoskeletal and connective tissue disorders
Blood creatinine increasedBlood and lymphatic system disorders
CandidiasisReproductive system and breast disorders
CataractEye disorders
Decreased appetiteGastrointestinal disorders
Dental cariesGastrointestinal disorders
DysenteryGastrointestinal disorders
Ear infectionEar and labyrinth disorders
EpistaxisRespiratory, thoracic and mediastinal disorders
GastritisGastrointestinal disorders
Hemoglobin decreasedBlood and lymphatic system disorders
LeuokocytosisBlood and lymphatic system disorders
MalaiseGeneral disorders
Musculoskeletal painMusculoskeletal and connective tissue disorders
NauseaGastrointestinal disorders
PainGeneral disorders
Parasitic gastroenteritisInfections and infestations
PruritisSkin and subcutaneous tissue disorders
RhinorrhoeaRespiratory, thoracic and mediastinal disorders
SinobronchitisRespiratory, thoracic and mediastinal disorders
TonsillitisGastrointestinal disorders
UrticariaSkin and subcutaneous tissue disorders
VomitingGastrointestinal disorders

Most-reported serious reactions: Haemorrhoids.

Data from ClinicalTrials.gov NCT05135273 adverse events section.

Sponsor's own description

Background: Researchers are trying to develop a vaccine that will safely reduce the spread of malaria in the community by preventing mosquitos from carrying malaria from person to person. Objective: To assess in African adults the safety of and immune response to the administration of Pfs230D1-EPA/Matrix-M vaccine as compared to the rabies vaccine control. Eligibility: Healthy adults (18 to 50 years of age) who reside in Sotuba and surrounding villages in Mali Design: Participants will be screened with: * Medical history * Physical exam * Blood, urine, and heart tests * Malaria comprehension exam Participants will be randomly assigned to get either the experimental vaccine or the approved rabies vaccine. They will not know which they are getting. Participants will get 3 doses of the study or comparator vaccine via injection in the upper arm. This occurs at the first visit, 1 month, and 2 months later. Participants will have up to 23 scheduled visits over 14 to 16 months. Each visit includes a physical exam, and blood will be collected at most visits. Participants will be followed up to 1 year after the final vaccination. If participants develop an injection site rash or reaction, photographs may be taken of the site.

Publications & conference data

8 peer-reviewed publications reference this trial (live from Europe PMC):

  1. Nanotechnology's frontier in combatting infectious and inflammatory diseases: prevention and treatment.
    Huang Y, Guo X, Wu Y, Chen X, et al · · 2024 · cited 188× · PMID 38378653 · DOI 10.1038/s41392-024-01745-z
  2. Current approaches to malaria vaccines.
    Duffy PE. · · 2022 · cited 34× · PMID 36343566 · DOI 10.1016/j.mib.2022.102227
  3. mRNA vaccines expressing malaria transmission-blocking antigens Pfs25 and Pfs230D1 induce a functional immune response.
    Scaria PV, Roth N, Schwendt K, Muratova OV, et al · · 2024 · cited 26× · PMID 38184666 · DOI 10.1038/s41541-023-00783-y
  4. Vaccines and monoclonal antibodies: new tools for malaria control.
    Miura K, Flores-Garcia Y, Long CA, Zavala F. · · 2024 · cited 24× · PMID 38656211 · DOI 10.1128/cmr.00071-23
  5. Extending the range of Plasmodium falciparum transmission blocking antibodies.
    Simons LM, Ferrer P, Gombakomba N, Underwood K, et al · · 2023 · cited 15× · PMID 37100721 · DOI 10.1016/j.vaccine.2023.04.042
  6. The Virtues and Vices of Pfs230: From Vaccine Concept to Vaccine Candidate.
    Duffy PE. · · 2022 · cited 14× · PMID 35895391 · DOI 10.4269/ajtmh.21-1337
  7. A potent and durable malaria transmission-blocking vaccine designed from a single-component 60-copy Pfs230D1 nanoparticle.
    Salinas ND, Ma R, Dickey TH, McAleese H, et al · · 2023 · cited 13× · PMID 37596283 · DOI 10.1038/s41541-023-00709-8
  8. A Self-Assembling Pfs230D1-Ferritin Nanoparticle Vaccine Has Potent and Durable Malaria Transmission-Reducing Activity.
    Salinas ND, Ma R, McAleese H, Ouahes T, et al · · 2024 · cited 6× · PMID 38793797 · DOI 10.3390/vaccines12050546

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Other recruiting trials for Malaria,Falciparum

Currently open trials in the same condition.

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Data sources for this page

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Primary sources · FDA · ClinicalTrials.gov · EMA · SEC EDGAR · ChEMBL · Wikidata · full sourcing