Journal Club: The Simplest Way to Lengthen Telomeres?

Lengthening telomeres with a simple supplement sounds almost too good to be true. Yet, two recent papers suggest that supplying cells with thymidine, a basic DNA building block, is enough to do just that. Join us as we explore the unexpected discovery, why it's a big deal for telomere biology, and the big question that remains: how does it actually work?(00:00) Intro(07:20) Why do we even need telomeres(14:30) The approach: CRISPR screen for telomere regulators(16:30) The core finding: More thymidine, longer telomeres(21:40) What makes these papers cool pt 1(25:00) The missing piece: What's the mechanism?(29:50) What makes these papers cool pt 2(33:30) OutroThe papers:1. Mannherz, W., Agarwal, S. Thymidine nucleotide metabolism controls human telomere length. Nat Genet 55, 568–580 (2023).2. Mannherz, W., Crompton, A., Lampl, N. et al. Metabolic constraint of human telomere length by nucleotide salvage efficiency. Nat Commun 16, 3000 (2025).