A computational model predicts how aged tissue secretions reprogram cellular function, validated in cartilage chondrocytes where aged signals suppress mitochondrial respiration compared to young secretions. This approach maps extracellular signaling to intracellular transcriptional cascades, enabling targeted intervention design for age-related tissue degeneration.
Key Points
- Aged tissue secretions reprogram chondrocyte function via distinct signaling pathways
- Model predicts mitochondrial respiration as primary target of age-dependent signals
- Network framework enables tissue-specific intervention design for cellular rejuvenation
Longevity Analysis
Aging involves complex communication between cells and their surrounding environment. This work decodes a specific layer of that communication—how secreted factors from aged tissues drive cellular aging in neighboring cells—by mapping the signal propagation pathways that lead to phenotypic change. The finding that mitochondrial function is a primary target of age-associated extracellular signals points to a mechanism where tissue environment actively suppresses cellular energy production with age. Rather than viewing aging as an intrinsic cellular clock, this framework suggests that restoring youthful extracellular signaling cues could reverse age-related transcriptional patterns, making it directly relevant to interventions aimed at cellular regeneration and tissue function restoration.
Original published by Wiley Aging Cell, by Tyler J. McNeill, Fabrisia Ambrosio, Hirotaka Iijima .