Age Effects Aggressive Behavior: RNA-Seq Analysis in Cattle with Implications for Studying Neoteny Under...

Area of Science:

• Neuroscience
• Genomics
• Animal Behavior

Background:

• Reactive aggression is primarily regulated by the prefrontal cortex.
• Molecular mechanisms of adult aggressiveness are not fully understood.
• Bovine breeds like Lidia exhibit distinct aggressive tendencies.

Purpose of the Study:

• Investigate differential gene expression in the prefrontal cortex of aggressive Lidia bulls.
• Identify molecular changes associated with adult aggressiveness.
• Compare gene expression patterns with cross-species aggression studies.

Main Methods:

• RNA-sequencing (RNA-seq) to analyze gene expression.
• Comparison of gene expression between young (3-year-old) and adult (4-year-old) bulls.
• Cross-species comparative analysis of differentially expressed genes.

Main Results:

• Identified 50 up-regulated and 193 down-regulated genes in adult bulls.
• Found 29 commonly regulated genes with previous aggressive behavior studies.
• Detected altered regulation in synaptogenesis and glutamate receptor pathways.

Conclusions:

• Specific molecular changes in the prefrontal cortex correlate with adult aggressiveness in bulls.
• Gene expression alterations in pathways like synaptogenesis and glutamate signaling are implicated in aggression.
• Findings may relate to neoteny, a retention of juvenile traits, in domesticated animals.