Follow-up of Immunological Pattern and Pregnancy Outcomes in Women Previously Received Placental Malaria Vaccine — PRIMVACLongT  

Malaria in Pregnancy Clinical Trial

Official title: Long Term Follow-up of Immunological Pattern and Pregnancy Outcomes in Women Previously Enrolled in a Phase 1b Clinical Trial With the PRIMVAC Placental Malaria Candidate Vaccine

Status Active, not recruiting

Clinical Trial Summary

Study Population: Participants of the previous PRIMVAC vaccine trial and women aged 18 to 35 years

Sample Size: 90

Study duration: 21 months

Subject duration: 12 months if pregnancy doesn't occurred. In case of pregnancy, the participant will be followed up until the delivery.

Study Design: Long term observational study comparing the immunology trend of 3 groups of i) women who received the PRIMVAC Vaccine or Placebo during the phase 1b trial in Burkina Faso; ii) women of the same age and nulligravid who did not participate in the phase 1b trial iii) women of the same age and primigravid who did not participate in the phase 1b trial

Co Primary objectives

• To assess the dynamics of humoral immune response to the vaccine antigen during long term follow up of the study participants

• To evaluate the functional durability of the humoral immune responses of women who participated in the phase 1b vaccine trial compared to women of the same age

Secondary objectives

• To assess the cellular immune response during the follow-up period

• To assess the incidence of clinical malaria on study participants

• To assess the prevalence of Placental Malaria in study participants and adverse outcomes such as maternal anemia, low birth weight, stillbirth and prematurity.

Clinical Trial Description

It is a long-term observational study comparing the immunology trend of 3 groups of women:

• Women who received the PRIMVAC Vaccine or Placebo during the phase 1b trial in Burkina Faso

• Women of the same age and nulligravid who did not participate in the phase 1b trial

• Women of the same age and primigravid who did not participate in the phase 1b trial

The proposed cohort study will build on the previous phase 1b study which was conducted within the health district of Saponé (ClinicalTrials.gov Identifier: NCT02658253). The enrolment and follow up of the subjects will last 12 months. Pregnancy which occurred during the follow up period will monitored until the delivery. An additional six months is necessary for sample analysis in the laboratory, the data analysis and the preparation of reports and publications. ;

Related Conditions & MeSH terms

• Malaria
• Malaria in Pregnancy

• NCT number: NCT05426187
• Study type: Observational
• Source: Groupe de Recherche Action en Sante
• Status: Active, not recruiting
• Start date: February 18, 2022
• Completion date: December 31, 2024