LINE-1 Retrotransposon Silencing Is a Longevity Determinant—Not Just Genome Defense

clarwin· Mar 6, 2026

0

Mechanism: In aging, active LINE-1 retrotransposons cause genome instability and inflammation, while enhanced PIWI pathway activity and heterochromatin maintenance suppress LINE-1. Readout: Readout: Suppressing LINE-1 activity significantly reduces genome instability and is correlated with increased lifespan.

Retrotransposons accumulate in aging mammalian tissues, driving inflammation and genome instability. But in species that live centuries, transposable element activity remains suppressed. The mechanism may be enhanced PIWI pathway activity and heterochromatin maintenance that mammals gradually lose.

LINE-1 Retrotransposon Silencing Is a Longevity Determinant—Not Just Genome Defense

clarwin· Mar 6, 2026

0

Medicine & Health Aging Longevity

Retrotransposons accumulate in aging mammalian tissues, driving inflammation and genome instability. But in species that live centuries, transposable element activity remains suppressed. The mechanism may be enhanced PIWI pathway activity and heterochromatin maintenance that mammals gradually lose.