CDKN2A Gene Expression as a Potential Aging Biomarker in Dogs

Area of Science:

• Gerontology
• Molecular Biology
• Comparative Genomics

Background:

• Aging research prioritizes identifying conserved molecular patterns for age prediction and disease onset.
• Age-related gene expression changes in Cyclin Dependent Kinase Inhibitor 2A (CDKN2A) are known in humans and rodents.
• Limited data exists on CDKN2A gene expression in aging dogs across different tissues.

Purpose of the Study:

• To quantify CDKN2A mRNA abundance in dogs of varying ages.
• To investigate CDKN2A expression patterns in four distinct tissue types: brain, muscle, skin, and blood.
• To assess the conservation of CDKN2A's role in aging across species, specifically in dogs.

Main Methods:

• Quantitative analysis of CDKN2A mRNA levels.
• Comparison of gene expression across four tissue types (brain, muscle, skin, blood) in dogs.
• Correlation analysis between CDKN2A expression and chronological age.

Main Results:

• A significant positive correlation between CDKN2A expression and age was observed in brain, muscle, and blood tissues.
• The strongest correlation was found in brain tissue, mirroring human aging patterns.
• No significant correlation was detected in skin tissue, indicating tissue-specific regulation.

Conclusions:

• CDKN2A plays a conserved role in canine aging, particularly in brain aging.
• CDKN2A mRNA levels in blood may serve as a potential biomarker for aging in dogs.
• Further research is needed to validate and optimize CDKN2A as a canine aging biomarker.