4.4 Article

The dynamics of ultrastructural changes duringEntamoeba invadensencystation

Journal

PARASITOLOGY
Volume 147, Issue 12, Pages 1305-1312

Publisher

CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0031182020001079

Keywords

Cell differentiation; dormancy; infectious disease; protozoan parasite

Categories

Funding

  1. Egyptian Ministry of Higher Education
  2. Ministry of Education, Culture, Sports, Science and Technology of Japan [18H04675]
  3. Joint Usage/Research Center on Tropical Disease, Institute of Tropical Medicine (NEKKEN) [2017-Ippan-12, 2018-Ippan-17, 2020-Ippan-17]
  4. AMED-J-PRIDE [JP19fm0208025]
  5. Grants-in-Aid for Scientific Research [18H04675] Funding Source: KAKEN

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Entamoeba histolyticainfection causes amoebiasis, which is a global public health problem. The major route of infection is oral ingestion ofE. histolyticacysts, cysts being the sole form responsible for host-to-host transmission. Cysts are produced by cell differentiation from proliferative trophozoites in a process termed 'encystation'. Therefore, encystation is an important process from a medical as well as a biological perspective. Previous electron microscopy studies have shown the ultrastructure of precysts and mature cysts; however, the dynamics of ultrastructural changes during encystation were ambiguous. Here, we analysed a series ofEntamoeba invadensencysting cells by transmission electron microscopy.Entamoeba invadensis a model for encystation and the cells were prepared by short interval time course sampling fromin vitroencystation-inducing cultures. We related sampled cells to stage conversion, which was monitored in the overall population by flow cytometry. The present approach revealed the dynamics of ultrastructure changes duringE.invadensencystation. Importantly, the results indicate a functional linkage of processes that are crucial in encystation, such as glycogen accumulation and cyst wall formation. Hence, this study provides a reference for studying sequential molecular events duringEntamoebaencystation.

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