In silico identification of genetically attenuated vaccine candidate genes for Plasmodium liver stage

Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases
Hirdesh KumarJames Gomes

Abstract

Genetically attenuated parasites (GAPs) that lack genes essential for the liver stage of the malaria parasite, and therefore cause developmental arrest, have been developed as live vaccines in rodent malaria models and recently been tested in humans. The genes targeted for deletion were often identified by trial and error. Here we present a systematic gene - protein and transcript - expression analyses of several Plasmodium species with the aim to identify candidate genes for the generation of novel GAPs. With a lack of liver stage expression data for human malaria parasites, we used data available for liver stage development of Plasmodium yoelii, a rodent malaria model, to identify proteins expressed in the liver stage but absent from blood stage parasites. An orthology-based search was then employed to identify orthologous proteins in the human malaria parasite Plasmodium falciparum resulting in a total of 310 genes expressed in the liver stage but lacking evidence of protein expression in blood stage parasites. Among these 310 possible GAP candidates, we further studied Plasmodium liver stage proteins by phyletic distribution and functional domain analyses and shortlisted twenty GAP-candidates; these are: fabB/F, fabI, arp, ...Continue Reading

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Citations

Oct 30, 2016·Trends in Parasitology·Mirko Singer, Friedrich Frischknecht
Aug 3, 2019·Journal of Biomolecular Structure & Dynamics·Aziz Ul-Rahman, Muhammad Abu Bakr Shabbir
Aug 9, 2020·Journal of Biomolecular Structure & Dynamics·Bishajit SarkarAbu Tayab Moin

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