Sumaya Biotech

npj Vaccines volume 5, Article number: 10 (2020)

Immunization with full-length Plasmodium falciparum merozoite surface protein 1 is safe and elicits functional cytophilic antibodies in a randomized first-in-human trial.

A vaccine remains a priority in the global fight against malaria. Here, we report on a single-center, randomized, double-blind, placebo and adjuvant-controlled, dose escalation phase 1a safety and immunogenicity clinical trial of full-length Plasmodium falciparum merozoite surface protein 1 (MSP1) in combination with GLA-SE adjuvant. Thirty-two healthy volunteers were vaccinated at least three times with MSP1 plus adjuvant, adjuvant alone, or placebo (24:4:4) to evaluate the safety and immunogenicity. MSP1 was safe, well tolerated and immunogenic, with all vaccinees sero-converting independent of the dose. The MSP1-specific IgG and IgM titers persisted above levels found in malaria semi-immune humans for at least 6 months after the last immunization. The antibodies were variant- and strain-transcending and stimulated respiratory activity in granulocytes. Furthermore, full-length MSP1 induced memory T-cells. Our findings encourage challenge studies as the next step to evaluate the efficacy of full-length MSP1 as a vaccine candidate against falciparum malaria (EudraCT 2016-002463-33).

read more
download press release


Battling Malaria: A new European fund to fix a critical market failure.

Lifesaving medical interventions are not getting developed despite scientific feasibility and significant donor funding available – novel public-private partnership aims to broaden product development pipeline.

read more
download press release


Sumaya`s Malaria Programs
have been selected to be part of the kENUP Malaria Fund

read more


Neuer Impfstoff-Kandidat gegen
Malaria erfolgreich in erster klinischer Studie untersucht

download press release