Stress responses and dynamic equilibrium: Key determinants of aging in the C. elegans clk-1 mutant
Carracedo-Gonzalez, J.; Arellano-Carbajal, F.; Garrido, E.; Alvarez-Martinez, R.
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Systems biology offers valuable insights into aging by integrating experimental data with mathematical models and bioinformatics tools. Long-lived mutants of C. elegans, particularly clk-1, have provided extensive data on the aging mechanisms. The clk-1 gene, which encodes a ubiquitin precursor, shows a pleiotropic phenotype characterized by slow behavior, high mitochondrial ROS levels, autophagy, and metabolic changes. However, the link between these changes and lifespan extension remains unclear. Using a Boolean network, we modeled genetic interactions and derived differential equations for a continuous approach. Our results highlight that aak-2 (AMPK) is crucial for clk-1 lifespan extension owing to its role in stress response regulation. We introduced a health index based on the attrition of neuromuscular behaviors to assess the health of various strains. Our findings suggest that while stress responses may enhance lifespan, overall health is determined by the extent of the damage.
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