Can aging be reversed? - Biologist explains | Michael Levin and Lex Fridman

Quick Overview

The core idea discussed is that biological systems, like the Anthrobots created from human tracheal cells, possess an inherent capacity to reverse aging or revert to earlier developmental states if they are placed in an appropriate embryonic-like environment, suggesting that aging is not strictly unidirectional.

Key Points: Anthrobots, which are living robots made from human tracheal cells, can self-assemble into mobile structures and perform tasks (0:04). The speaker suggests that Anthrobots derived from human tracheal cells can reverse aging, potentially looking 20% younger based on epigenetic clocks (0:05, 0:50). The research involves protocols like an "epigenetic clock" procedure that estimates biological age based on DNA methylation patterns (0:08). The underlying principle is that cells need to be convinced, through an embryonic-like environment, that their current age priors are incorrect, forcing them to update (1:17, 2:35). The speaker references the work of Steve Horvath, who developed a multi-tissue DNA methylation age predictor using 8,000 samples (0:24). The discussion touches upon the implications for longevity and regenerative medicine, suggesting that convincing cells of their prior state can affect aging and cancer treatment (1:03, 3:09). The concept relies on creating an environment that signals to the cells they are in an embryonic state, overriding their current epigenetic memory (2:27, 2:35).

Context: This segment features a discussion, likely from the Lex Fridman Podcast, focusing on cutting-edge research in biology, specifically concerning cellular aging and regeneration, involving the creation of 'Anthrobots'—mobile structures built from human tracheal cells. The conversation centers on the work of researchers like Steve Horvath (mentioned via a slide reference) regarding epigenetic clocks and the speaker's hypothesis that cells can be manipulated to reverse their perceived age if they are bathed in an environment mimicking early development, like that of an embryo.