Simplified picture of the aging-related signaling pathways that have
been in major focus of experimental aging research: IGF-1/AKT/FOXO3 - mediated
growth/survival, TP53/P21/P16 - mediated apoptosis/senescence/autophagy, and
mTOR/S6K - mediated autophagy/survival/growth. These pathways biologically
interact and together decide on specific outcomes of cell
responses to stress/damage, such as apoptosis, senescence, survival, growth,
division, or autophagy. The choice of a particular outcome in given conditions
may differ between carriers of different genotypes, which might contribute to
the differences in pace of aging between individuals, species or strains (Image
by Ukraintseva© 2020, using MetaCore Pathway Map Creator tool
from Clarivate Analytics).