Dynamically expressed genes provide candidate viability biomarkers in a model coccidian

Area of Science:

• Parasitology
• Molecular Biology
• Genomics

Background:

• Eimeria parasites cause livestock disease; related Cyclospora cayetanensis causes human disease.
• Oocyst maturation (sporulation) is critical for coccidian parasite infectivity.
• Understanding gene expression during sporulation is key to parasite biology.

Purpose of the Study:

• To analyze gene transcription patterns during Eimeria acervulina oocyst maturation.
• To predict gene functions and identify conserved genes with Cyclospora cayetanensis.
• To uncover molecular mechanisms underlying coccidian sporulation.

Main Methods:

• RNA-sequencing of Eimeria acervulina oocysts at different maturation stages.
• Bioinformatic analysis of gene expression data, including mapping to the genome.
• Functional annotation using Gene Ontology (GO) and KEGG pathway analysis.

Main Results:

• ~6,900 annotated genes showed temporally coordinated expression patterns.
• Fifty-three highly expressed genes ( >1,000 TPM) were involved in essential cellular functions.
• Significant changes in gene expression were observed between immature and mature oocysts, with many genes upregulated over time, particularly those involved in metabolism, respiration, and stress responses.

Conclusions:

• Sporulation involves coordinated gene expression changes, especially in metabolic pathways.
• Identified genes crucial for oocyst development and maturation.
• Conserved genes between E. acervulina and C. cayetanensis may serve as potential biomarkers for human disease risk.