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Published on: July 3, 2013
Transcriptomic Profiling of Canine Testicular Leydig Cell Tumors Uncovers Key Upregulated Gene Pathways
Malgorzata Kotula-Balak1, Recep Uyar2,3, Emilia Morańska4
1Department of Basic Sciences, Faculty of Veterinary Medicine, University of Agriculture in Krakow, Al. Mickiewicza 24/28, 30-059 Krakow, Poland.
Animals : an Open Access Journal From MDPI
|July 15, 2026
Summary
Canine Leydig cell tumors exhibit complex transcriptomic profiles with upregulated genes in steroid production and angiogenesis, and downregulated genes in cell differentiation. These findings offer insights into tumorigenesis and potential therapeutic targets.
Area of Science:
- Comparative oncology
- Canine reproductive biology
- Transcriptomics
Background:
- Leydig cell tumors (LCTs) are common in canine reproductive tissues.
- Understanding the molecular mechanisms of canine LCTs is crucial for veterinary oncology.
- Canine LCTs may serve as a valuable comparative model for human malignancies.
Purpose of the Study:
- To characterize the transcriptomic profile of canine Leydig cell tumors.
- To identify differentially expressed genes and associated pathways in canine LCTs.
- To explore potential diagnostic biomarkers and therapeutic targets for canine LCTs.
Main Methods:
- Total RNA isolation from healthy canine testes and Leydig cell tumors.
- RNA sequencing (RNA-seq) on the Illumina platform.
- Differential gene expression analysis, Gene Ontology (GO), KEGG, and GSEA using FastQC and Trimmomatic for quality control.
Main Results:
- Identified 1500 differentially expressed transcripts (982 upregulated, 168 downregulated).
- Upregulated genes involved in sex steroid production (e.g., CYP11A1, STAR), angiogenesis (e.g., VEGFA), and cholesterol metabolism.
- Downregulated genes linked to cell differentiation and immune regulation; identified unique alterations in estrogen and relaxin signaling.
Conclusions:
- Canine LCTs display a complex transcriptomic profile with conserved oncogenic pathways and species-specific alterations.
- Findings highlight the role of steroidogenesis, angiogenesis, and signaling pathways in canine LCT development.
- The study provides a foundation for novel biomarkers and targeted therapies in veterinary oncology and comparative medicine.
