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Discrimination Experiments in Entamoeba and Evidence from Other Protists Suggest Pathogenic Amebas Cooperate with Kin

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The Journal of Eukaryotic Microbiology
|July 29, 2018
PubMed
Summary

Entamoeba histolytica may possess kin recognition abilities, crucial for its life cycle and host interactions. Understanding this can inform strategies against amebiasis.

Keywords:
Amoebozoabiological cheatinggreen-beard genesinclusive fitnesskin recognitionkin selectionpopulation bottleneck

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Area of Science:

  • Microbiology
  • Evolutionary Biology
  • Parasitology

Background:

  • Entamoeba histolytica's ability to discriminate between self and non-self (kin recognition) is poorly understood.
  • Kin recognition is observed in various organisms, including pathogenic eukaryotes, social amoebas, yeast, bacteria, and archaea.
  • Inclusive fitness theory explains kin recognition as a mechanism for genetically related individuals to cooperate and exclude non-kin.

Purpose of the Study:

  • To review the biological significance of taxa, clone, and kin discrimination/recognition in Entamoeba species.
  • To discuss the implications of these recognition abilities for Entamoeba histolytica's life cycle and host infestation.
  • To explore how understanding Entamoeba's natural history can aid in mitigating amebiasis.

Main Methods:

  • Review of in vitro pairwise discrimination/recognition encounters between seven Entamoeba lineages.
  • Discussion of existing literature on kin recognition in various taxa.
  • Analysis of phylogenetic relationships between generalist and specialist Entamoeba species.

Main Results:

  • Laboratory observations suggest Entamoeba lineages can discriminate between self and non-self.
  • This discrimination has potential biological significance across diverse Entamoeba species.
  • The findings highlight the importance of these abilities for parasite-host interactions.

Conclusions:

  • Entamoeba histolytica likely possesses sophisticated recognition mechanisms.
  • Understanding these mechanisms is vital for comprehending its pathogenesis and transmission.
  • This knowledge can lead to novel strategies for controlling amebiasis and improving human health.