Abstract
Telomerase activity and telomere restoration in certain somatic cells of
human adults maintain the proliferative capacity of these cells and
contribute to their regenerative potential, and telomerase activity and
telomere length are commonly considered lifespan predictors. Eusocial
insects provide excellent model systems for aging research based on
their extraordinary caste-related lifespan differences that contradict
the typical fecundity/lifespan trade-off. In agreement with the common
presumption, telomerase activity is upregulated in the reproductive,
long-lived individuals of eusocial insects such as queens and kings,
proposing that telomerase activity acts as a key factor in their
extended longevity. But, as documented by the presence of telomerase in
somatic tissues of numerous invertebrate and vertebrate species, the
connection between telomerase activity and the predicted lifespan is not
clear. Here, I ask whether somatic telomerase activity in eusocial
reproductives may serve its non-canonical function to protect its
individuals against the exacerbated metabolic stress upon reproduction
and be a reflection of a more common phenomenon among species. I propose
a hypothesis that the presence of telomerase activity in somatic cells
reflects a different reproduction strategy of the species.