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Application of wheat germ cell-free protein expression system for novel malaria vaccine candidate discovery

Malaria causes about 216 million clinical cases and 0.7 million deaths annually. One promising route to address malaria is vaccination. However, so far, not even a single licensed malaria vaccine has been developed. Even the effectiveness of RTS,S, the world’s most advanced malaria vaccine candidate (MVC) in clinical trials, is less than 50% efficacy against the disease. This backdrop indicates that the search for a truly effective vaccine is far from over and galvanizes us to expand the arsenal of promising MVC antigens to include in a next generation subunit vaccine. In our previous proof of principle studies, we have found that the wheat germ cell-free protein synthesis system (WGCFS) is one of the optimal tools for synthesis of quality malaria proteins and hence the identification of novel MVCs. This review summarizes the initial progresses so far made regarding the identification of novel MVCs using WGCFS.