Evolutionary-driven C-MYC gene expression in mammalian fibroblasts.

Area of Science:

• Genomics and Molecular Biology
• Comparative Transcriptomics
• Mammalian Cell Biology

Background:

• Cross-species gene expression studies are limited, especially for defined cell types and their regulatory networks.
• Understanding conserved and divergent gene regulation is key to comparative biology and disease research.

Purpose of the Study:

• To investigate the relative expression of C-MYC in mammalian fibroblasts (Ovis aries and Bos taurus).
• To explore the regulatory landscape of C-MYC across species using in silico methods.
• To identify evolutionary adaptations in C-MYC regulation and function.

Main Methods:

• Cross-species quantitative reverse transcription PCR (RT-qPCR) for C-MYC expression analysis.
• In silico prediction of transcription factor binding sites within C-MYC and its promoter region.
• Bioinformatic analysis of cis-regulatory elements, non-coding RNA interactions, and protein domain conservation.

Main Results:

• Significant variations in transcription factor binding sites suggest evolutionary rewiring of C-MYC cis-regulatory elements.
• C-MYC and its target TBX3 were upregulated in Bos taurus fibroblasts.
• Bos taurus exhibited species-specific C-MYC exonization, alternative splicing, and non-coding RNA binding sites.

Conclusions:

• Mammalian fibroblasts exhibit evolutionary divergence in C-MYC relative expression and its regulatory mechanisms.
• Conserved C-MYC protein orthologs show variations in key functional domains, indicating adaptive evolution.
• Findings provide insights into cellular physiology, reprogramming, and C-MYC-associated pathologies.