Comparative transcriptome analysis identified genes involved in ovarian development in Takifugu rubripes

Area of Science:

• * Molecular biology
• * Genomics
• * Reproductive biology

Background:

• * Ovarian development is a complex biological process influenced by numerous genes.
• * The specific molecular mechanisms governing ovarian development in Takifugu rubripes (T. rubripes) are not well understood.
• * Investigating these mechanisms is crucial for understanding fish reproductive biology.

Purpose of the Study:

• * To identify genes associated with ovarian development in T. rubripes.
• * To explore the regulatory mechanisms controlling oocyte maturation in this species.
• * To provide a comprehensive transcriptomic analysis of ovarian development in female T. rubripes.

Main Methods:

• * RNA sequencing was performed on ovarian tissues from four developmental stages (II–V).
• * Differential gene expression analysis was conducted to identify significant genes (DEGs).
• * Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses were performed, with key gene expression patterns validated by quantitative PCR (qPCR).

Main Results:

• * A total of 16,929 differentially expressed genes (DEGs) were identified across developmental stages.
• * Enriched pathways included ovarian steroidogenesis, estrogen-mediated signaling, and TGF-beta signaling.
• * Specific genes (e.g., cyp17a1, cyp19a1, nanos1, foxl2, ar, hsd17b1) showed distinct expression patterns crucial for ovarian development and maturation.

Conclusions:

• * This study provides a valuable transcriptomic resource for understanding ovarian development in T. rubripes.
• * Identified genes and pathways offer insights into the molecular regulation of oocyte maturation.
• * The findings contribute to a deeper comprehension of fish reproductive biology and endocrinology.