Transcriptomic Profiling of Gene Expression Associated with Granulosa Cell Tumor Development in a Mouse Model

Area of Science:

• Reproductive biology
• Oncology
• Molecular genetics

Background:

• Ovarian granulosa cell tumors (GCTs) are rare, with poorly understood etiology.
• Genetically engineered mouse models offer insights into GCT pathogenesis.
• Constitutively active TGFβ signaling (TGFBR1-CA) in mice induces ovarian GCTs mimicking human disease.

Purpose of the Study:

• To identify molecular alterations in the ovary following TGFβ signaling activation.
• To characterize the gene expression profile associated with GCT development in a mouse model.
• To compare molecular changes in mouse GCTs with human GCTs and FOXL2 mutations.

Main Methods:

• Transcriptomic profiling (RNA-sequencing) of ovaries from TGFBR1-CA and control mice.
• Bioinformatics analysis to identify differentially expressed genes and pathways.
• Validation of select target genes.

Main Results:

• Dysregulation of multiple cellular events and signaling pathways, including neuroactive ligand-receptor interaction, relaxin, insulin, and complement signaling.
• Enrichment of differentially expressed genes in known GCT-related and tumorigenic pathways.
• Identification of common gene alterations between mouse models and human GCTs, including those with FOXL2 mutations.

Conclusions:

• The study defines the molecular signature of ovarian GCTs in a TGFBR1-activated mouse model.
• Findings provide a foundation for understanding the pathogenesis of these poorly defined ovarian tumors.
• The identified molecular alterations may guide future research into GCT mechanisms and therapeutic strategies.