Pan-Malaria Transmission-Blocking Vaccine AnAPN1

Malaria Clinical Trial

— PamTBVac  

Official title:

A Randomized Double-blinded Phase 1 Clinical Trial to Assess Safety, Tolerability and Reactogenicity of the Pan-Malaria Transmission-Blocking Vaccine AnAPN1 in Healthy Adults Living in Gabon

Clinical Trial Details — Status: Not yet recruiting

Administrative data

• NCT number: NCT05905432
• Other study ID #: AnAPN1
• Status: Not yet recruiting
• Phase: Phase 1
• Start date: July 25, 2023
• Est. completion date: December 31, 2023

Study information

• Verified date: July 2023
• Source: Centre de Recherche Médicale de Lambaréné
• Contact: Jeannot ZINSOU
• Phone: +24174989191
• Email: zinaff[@]gmail.com
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Malaria is still responsible for more than 627,000 deaths each year, predominantly among children under 5 years old. Current reductions in deaths have stagnated, and additional setbacks for malaria control programs due to the Coronavirus Disease 2019 (COVID-19) pandemic are expected. To achieve malaria elimination and eradication a leverage concerted approaches to reduce clinical disease and prevent new infections is a must. The existing malaria controls tools including the a recombinant protein-based malaria vaccine (RTS,S ,(trade name MosquirixMosquirix )), a malaria vaccine currently undergoing implementation studies and endorsed by the World Health Organization on October 7, 2021, can reduce disease burden for patients but cannot ultimately support malaria elimination and eradication since their effect on malaria transmission is at most partial. Consequently, complementary interventions, such as transmission-blocking vaccines (TBVs) may prove to be a cost-effective intervention that can reduce on-going residual transmission and the cascade of new infections.

Description:

TBVs work by blocking parasite transmission to and from mosquitoes, with the added benefit of preventing the spread of parasites that have developed drug resistance or those that are vaccine-escape mutants of e.g. RTS,S. However, blocking transmission of all malaria species will be mandatory to achieve a globally relevant impact on malaria morbidity and mortality with Plasmodium falciparum and Plasmodium vivax being the most relevant targets. To date, the mosquito recombinant protein antigen vaccine Anopheline Alanyl Aminopeptidase N (AnAPN1)is the only TBV candidate that meets this need, wherein antibodies to this vaccine block both human malaria parasite species, underscoring its potential for supporting malaria elimination. The AnAPN1 vaccine consists of the AnAPN1 dimer antigen construct (UF6b) construct derived from the sequence of a protein of the mosquito midgut (Anopheles gambiae alanyl aminopeptidase), expressed as a recombinant protein in bacteria. With Global Health Innovative Technology Fund( GHIT) (G2020-208) support, the AnAPN1 reaches the First-In-Human milestone.

Recruitment information / eligibility

• Status: Not yet recruiting
• Enrollment: 33
• Est. completion date: December 31, 2023
• Est. primary completion date: December 31, 2023
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years to 45 Years

Eligibility

Inclusion Criteria :

• Healthy male and female volunteers aged 18-45 years.
• Able and willing (in the investigator's opinion) to comply with all trial requirements.
• General good health based on medical history and clinical examination.
• Written informed consent.
• Available to participate in follow up for the duration of trial (6 months following the last injection).
• Reachable by phone during the whole trial period.
• Women only: Must agree to practice continuous effective contraception for the duration of the trial.

Exclusion Criteria:

• Positive for P. falciparum sexual and asexual stages by thick blood smear microscopy on admission and documented parasitologically confirmed malaria parasites of at least 1000 parasite/microliter in the past four weeks.
• Pregnancy, lactation, or intention to become pregnant during the trial.
• Previous participation in a malaria vaccine trial.
• HIV and microscopically detectable schistosomiasis and Soil-Transmitted helminth infection.

Related Conditions & MeSH terms

• Malaria

Intervention

Drug:
• Vaccine AnAPN1
AnAPN1 is a recombinant protein expressed in Escherichia coli. It consists of the UF6b construct, derived from the sequence of the Anopheles gambiae alanyl aminopeptidase N (XM_318000.4) and will be formulated with or without Synthetic Glucopyranosyl Lipid A (GLA)- LSQ adjuvant. Route of administration is intramuscular.

Locations

Country	Name	City	State
Gabon	Centre de Recherches Médicales de Lammbaréné	Lambaréné	Moyen- Ogooué

Sponsors (2)

Lead Sponsor	Collaborator
Centre de Recherche Médicale de Lambaréné	Global Health Innovative Technology Fund

Country where clinical trial is conducted

Gabon, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Adverse events related to the vaccination.	Number and grade of adverse events possibly, likely, and definitely related to vaccination.	Day 14
Secondary	anti-UF6b IgG concentration	Area under the curve of anti-UF6b immunoglobulin G (IgG) concentration, using a qualified and validated ELISA protocol.	Day 28