Chronic high-fat feeding in rats imprinted a persistent senescence-like state on the liver's regenerative cell population, marked by mitochondrial dysfunction, oxidative stress, inflammatory secretion, and diminished proliferative capacity after injury. The defect persisted in organoids cultured for three passages outside the original metabolic environment, indicating the cells retained the program rather than merely responding to their surroundings. Mitochondria-targeted antioxidant treatment partially restored regenerative function, identifying mitochondrial failure as a modifiable component.
Key Points
- High-fat diet imprinted senescence-like state on liver progenitor cells
- Impairment persisted three passages outside the metabolic environment
- MitoQ partially restored organoid formation and oxygen consumption
Longevity Analysis
Metabolic stress does not simply damage mature tissue; it alters the cells responsible for replacing that tissue, converting a dietary exposure into a durable constraint on repair capacity. The persistence through serial passage reframes dietary excess as a cumulative liability for the organs that clear toxins and manage lipid handling, where regenerative reserve declines silently long before enzymes or imaging register dysfunction. Removing the metabolic burden matters more than any compensatory intervention added on top of it, though the partial rescue with mitochondrial-targeted antioxidants indicates the damaged energy machinery within these cells remains a legitimate point of leverage.
Original published by Wiley Aging Cell, by Mirai Yamazaki, Hiroya Yamada, Eiji Munetsuna, Yoshitaka Ando, Genki Mizuno, Takuya Wakasugi, Tomohide Sakakibara, Kumpei Hada, Hayato Ichikawa, Ryoga Senga, Moeno Asai, Hiroaki Ishikawa, Koji Suzuki, Koji Ohashi, Nobutaka Ohgami .