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Unravelling the Sexual Developmental Biology of , a Model for Comparative Coccidian Parasite Studies

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Abstract

Introduction: The apicomplexan parasite has global significance as an enteropathogen of suckling piglets. Its intricate life cycle entails a transition from an asexual phase to sexual development, ultimately leading to the formation of transmissible oocysts.

Methods: To advance our understanding of the parasite's cellular development, we complemented previous transcriptome studies by delving into the proteome profiles at five distinct time points of cultivation through LC/MS-MS analysis.

Results: A total of 1,324 proteins were identified in the developmental stages of , and 1,082 proteins were identified as significantly differentially expressed. Data are available via ProteomeXchange with identifier PXD045050. We performed BLAST, GO enrichment, and KEGG pathway analyses on the up- and downregulated proteins to elucidate correlated events in the life cycle. Our analyses revealed intriguing metabolic patterns in macromolecule metabolism, DNA- and RNA-related processes, proteins associated with sexual stages, and those involved in cell invasion, reflecting the adaptation of sexual stages to a nutrient-poor and potentially stressful extracellular environment, with a focus on enzymes involved in metabolism and energy production.

Discussion: These findings have important implications for understanding the developmental biology of as well as other, related coccidian parasites, such as spp. and . They also support the role of as a new model for the comparative biology of coccidian tissue cyst stages.

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