Stage-Specific Changes in Plasmodium Metabolism Required for Differentiation and Adaptation to Different Host and Vector Environments

PLoS Pathogens

Andrew P. Waters¹  James I. MacRae¹  Darren J. Creek²  Nisha Philip³  Michael P. Barrett³  Konstantina Georgiou³  Katie R. Hughes³  Malcolm J. McConville³  Anubhav Srivastava³ 

[1] Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria, Australia;Glasgow Polyomics, Wolfson Wohl Cancer Research Centre, Garscube Campus, Bearsden, University of Glasgow, Glasgow, United Kingdom;Wellcome Centre for Molecular Parasitology, Institute of Infection, Immunity & Inflammation, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom

关键词: Plasmodium;    Gametocytes;    Citric acid cycle;    Metabolic labeling;    Parasitic diseases;    Glutamine;    Glucose metabolism;    Blood;   

DOI  :  10.1371/journal.ppat.1006094

学科分类：生物科学（综合）

来源: Public Library of Science

【 摘 要 】

Malaria parasites (Plasmodium spp.) encounter markedly different (nutritional) environments during their complex life cycles in the mosquito and human hosts. Adaptation to these different host niches is associated with a dramatic rewiring of metabolism, from a highly glycolytic metabolism in the asexual blood stages to increased dependence on tricarboxylic acid (TCA) metabolism in mosquito stages. Here we have used stable isotope labelling, targeted metabolomics and reverse genetics to map stage-specific changes in Plasmodium berghei carbon metabolism and determine the functional significance of these changes on parasite survival in the blood and mosquito stages. We show that glutamine serves as the predominant input into TCA metabolism in both asexual and sexual blood stages and is important for complete male gametogenesis. Glutamine catabolism, as well as key reactions in intermediary metabolism and CoA synthesis are also essential for ookinete to oocyst transition in the mosquito. These data extend our knowledge of Plasmodium metabolism and point towards possible targets for transmission-blocking intervention strategies. Furthermore, they highlight significant metabolic differences between Plasmodium species which are not easily anticipated based on genomics or transcriptomics studies and underline the importance of integration of metabolomics data with other platforms in order to better inform drug discovery and design.

【 授权许可】

CC BY