That is a different start up from the one at Harvard.
Science has doubled the lifespan of mice so if they have good luck with dogs people might be the next step. Genes have secrets we may not even suspect.

Previous attempts tried changing the endcaps on cells that determine how many times they are instructed to replicate.
Using undiscovered genes that control cell replication with less mutation may be more successful.

I did an essay decades ago about how extended aging therapies would be a privilege of the wealthy that would safeguard their treatments via prohibitive cost.