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A UCLA study in mice reveals that aging muscle stem cells accumulate a protein that slows repair but boosts survival. This protein, NDRG1, acts like a brake, preventing cells from activating quickly after injury. When researchers blocked it in older mice, muscle healing sped up dramatically — but stem cells became less resilient over time. The work suggests aging may reflect a survival trade-off rather than straightforward decline.
Source: https://www.sciencedaily.com/releases/2 ... 092306.htm
Source: https://www.sciencedaily.com/releases/2 ... 092306.htm
