Parasites, Hosts and Diseases

The Korea Society for Parasitology and Tropical Medicine (대한기생충학·열대의학회)
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Microarray Analysis of Differentially Expressed Genes between Cysts and Trophozoites of Acanthamoeba castellanii

  • Moon, Eun-Kyung (Department of Parasitology, Kyungpook National University School of Medicine) ;
  • Xuan, Ying-Hua (Department of Immunology and Pathogenic Biology, Yanbian University College of Basic Medicine) ;
  • Chung, Dong-Il (Department of Parasitology, Kyungpook National University School of Medicine) ;
  • Hong, Yeon-Chul (Department of Parasitology, Kyungpook National University School of Medicine) ;
  • Kong, Hyun-Hee (Department of Parasitology, Kyungpook National University School of Medicine)
  • Received : 2011.07.28
  • Accepted : 2011.09.09
  • Published : 2011.12.15
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Abstract

Acanthamoeba infection is difficult to treat because of the resistance property of Acanthamoeba cyst against the host immune system, diverse antibiotics, and therapeutic agents. To identify encystation mediating factors of Acanthamoeba, we compared the transcription profile between cysts and trophozoites using microarray analysis. The DNA chip was composed of 12,544 genes based on expressed sequence tag (EST) from an Acanthamoeba ESTs database (DB) constructed in our laboratory, genetic information of Acanthamoeba from TBest DB, and all of Acanthamoeba related genes registered in the NCBI. Microarray analysis indicated that 701 genes showed higher expression than 2 folds in cysts than in trophozoites, and 859 genes were less expressed in cysts than in trophozoites. The results of real-time PCR analysis of randomly selected 9 genes of which expression was increased during cyst formation were coincided well with the microarray results. Eukaryotic orthologous groups (KOG) analysis showed an increment in T article (signal transduction mechanisms) and O article (posttranslational modification, protein turnover, and chaperones) whereas significant decrement of C article (energy production and conversion) during cyst formation. Especially, cystein proteinases showed high expression changes (282 folds) with significant increases in real-time PCR, suggesting a pivotal role of this proteinase in the cyst formation of Acanthamoeba. The present study provides important clues for the identification and characterization of encystation mediating factors of Acanthamoeba.

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References

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