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In vitro tRNA Methylation Assay with the Entamoeba histolytica DNA and tRNA Methyltransferase Dnmt2 Ehmeth Enzyme
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Lysine Methyltransferase EhPKMT2 Is Involved in the In Vitro Virulence of Entamoeba histolytica

Susana Munguía-Robledo1, Esther Orozco1, Guillermina García-Rivera1

  • 1Center for Research and Advanced Studies of the IPN, Department of Infectomics and Molecular Pathogenesis, National Polytechnic Institute, Mexico City 07360, Mexico.

Pathogens (Basel, Switzerland)
|March 29, 2023
PubMed

Insights

Protein lysine methyltransferases (PKMTs) regulate parasite virulence. This study investigated EhPKMT2 in Entamoeba histolytica, finding it crucial for cell growth, migration, and virulence, suggesting it as a therapeutic target for amebiasis.

Area of Science:

  • Biochemistry
  • Parasitology
  • Molecular Biology

Background:

  • Lysine methylation, a posttranslational modification catalyzed by protein lysine methyltransferases (PKMTs), plays a role in epigenetics and signaling pathways.
  • These pathways, including cell growth, migration, and stress response, are implicated in the virulence of protozoan parasites.
  • Entamoeba histolytica, responsible for human amebiasis, possesses four PKMTs, but their specific functions remain largely uncharacterized.

Purpose of the Study:

  • To investigate the role of EhPKMT2, one of the four PKMTs in Entamoeba histolytica, in parasite biology and virulence.
  • To analyze the expression and localization of EhPKMT2 under conditions relevant to amoeba virulence, such as heat shock and phagocytosis.
  • To determine the impact of EhPKMT2 knockdown on key cellular processes including growth, migration, and cytopathic effect.

Main Methods:

  • Analysis of EhPKMT2 expression levels and subcellular localization in Entamoeba histolytica trophozoites under stress (heat shock) and during phagocytosis.
  • Gene knockdown of EhPKMT2 to assess its functional significance.
  • Evaluation of cell growth, migration, and cytopathic effects following EhPKMT2 knockdown.

Main Results:

  • EhPKMT2 expression and localization were altered in response to heat shock and phagocytosis, suggesting its involvement in virulence-related events.
  • Knockdown of EhPKMT2 significantly affected cell growth, migration, and the cytopathic effect of Entamoeba histolytica.
  • The enzyme was found to participate in multiple cellular events crucial for parasite survival and pathogenesis.

Conclusions:

  • EhPKMT2 plays a significant role in the biology and virulence of Entamoeba histolytica.
  • The enzyme's involvement in cell growth, migration, and cytopathic effects highlights its importance in amebiasis pathogenesis.
  • EhPKMT2 represents a potential therapeutic target for developing novel strategies to combat amebiasis.
Keywords:
Entamoeba histolyticain vitro virulencelysine methylationlysine methyltransferasesstress response

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