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© Research
Publication : NPJ vaccines

Recombinant measles vaccine expressing malaria antigens induces long-term memory and protection in mice

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in NPJ vaccines - 27 Feb 2019

Mura M, Ruffié C, Combredet C, Aliprandini E, Formaglio P, Chitnis CE, Amino R, Tangy F

Link to Pubmed [PMID] – 30820355

NPJ Vaccines 2019;4:12

Following the RTS,S malaria vaccine, which showed only partial protection with short-term memory, there is strong support to develop second-generation malaria vaccines that yield higher efficacy with longer duration. The use of replicating viral vectors to deliver subunit vaccines is of great interest due to their capacity to induce efficient cellular immune responses and long-term memory. The measles vaccine virus offers an efficient and safe live viral vector that could easily be implemented in the field. Here, we produced recombinant measles viruses (rMV) expressing malaria “gold standard” circumsporozoïte antigen (CS) of () and () to test proof of concept of this delivery strategy. Immunization with rMV expressing CS or CS induced high antibody responses in mice that did not decrease for at least 22 weeks post-prime, as well as rapid development of cellular immune responses. The observed long-term memory response is key for development of second-generation malaria vaccines. Sterile protection was achieved in 33% of immunized mice, as usually observed with the CS antigen, and all other immunized animals were clinically protected from severe and lethal ANKA-induced cerebral malaria. Further rMV-vectored malaria vaccine candidates expressing additional pre-erythrocytic and blood-stage antigens in combination with rMV expressing CS may provide a path to development of next generation malaria vaccines with higher efficacy.

https://www.ncbi.nlm.nih.gov/pubmed/30820355