Prospects for extending healthy life - a lot

Instead of trying to slow down metabolism or fix pathology, the engineering approach focuses on directly repairing the accumulated molecular and cellular damage that causes aging. This is seen as more feasible and effective.

The seven categories include cells dying and not being replaced, indigestible molecules accumulating inside and outside cells, cross-linking of proteins, mutations in mitochondrial DNA, loss of proteostasis, and altered intercellular communication.

By identifying bacteria that can break down waste products in the environment, scientists can find the genes and enzymes responsible. These could then be used to enhance our own cells' ability to clear out accumulated, indigestible molecules that cause disease.

The foundation aims to demonstrate that the 'SENS' (Strategies for Engineered Negligible Senescence) approach can work in mammals, specifically by aiming to triple the remaining lifespan of middle-aged mice.

Demonstrating efficacy in mice might take about 10 years, with translation to humans potentially taking another 15 years or more, depending on luck and progress. However, even small advances could lead to significant life extension.

The speaker suggests there is currently 'bugger all' that can significantly extend lifespan beyond a year or two. While exercise and healthy living are important for maintaining health until therapies arrive, they don't dramatically increase longevity on their own.

The speaker acknowledges potential problems but argues that saving lives and extending health should not be halted due to fear. He emphasizes that future societies should have the choice to address these issues, rather than imposing current values on them.

It involves repairing accumulated damage, which is seen as a more viable strategy than trying to understand and optimize complex metabolism or dealing with advanced pathology. Repairing damage buys time and can be done iteratively.

The speaker is optimistic, drawing parallels with the rapid advancements in technologies like flight. He believes that with sufficient effort and enthusiasm, significant progress in overcoming aging is achievable within decades.

Demonstrating significant progress in mice, such as trebling their lifespan, would create public and policy acceptance that human applications are a matter of time, overcoming current skepticism about aging being inevitable.

The speaker argues no, stating that reduced death rates would maintain static genetic diversity, and future technologies used to combat aging could also be used to enhance genetic diversity for pandemic resistance.