The Nexus of Extreme Longevity and Physiological Stress: An Evolutionary Rationale for Heightened CIRBP-Mediated DNA Repair in the Bowhead Whale (Balaena mysticetus)

The bowhead whale (Balaena mysticetus) exhibits a lifespan exceeding 200 years and demonstrates exceptional resistance to age-related diseases, including cancer. Elevated expression of cold-inducible RNA-binding protein (CIRBP) enhances DNA double-strand break (DSB) repair, thereby contributing to genomic stability and longevity \citep{firsanov2025dna}. This framework hypothesizes that physiological adaptations, such as bradycardia and hypoxia during deep dives, drive the heightened CIRBP expression. Recurrent stressors from low temperatures and oxygen deprivation increase DNA damage risks, selectively favoring enhanced CIRBP activity. Original analyses of public transcriptomic data validate elevated CIRBP levels, comprehensive comparative analyses across species underscore unique adaptations, and advanced stochastic simulations with rigorous statistical validation support this model, establishing a direct link between CIRBP and longevity. Detailed graphical illustrations elucidate mechanisms, comparisons, and results, ensuring scientific precision and depth.