All articles tagged with #metabolic plasticity
A new review in Nature argues that mitochondria are not a uniform network but a diverse ecosystem of specialized subpopulations. These subpopulations differ in shape, metabolism, and location, adapting to specific cellular needs. This heterogeneity is driven by fusion, fission, and genetic factors, and is crucial for understanding diseases like cancer and neurodegeneration.
New research from the Leibniz Institute on Aging links age-related mitochondrial decline to reduced membrane phosphatidylcholine, which makes mitochondrial networks more fragmented and less adaptable. In Caenorhabditis elegans, impairing phosphatidylcholine production induced aging-like mitochondrial changes, while providing phosphatidylcholine or its precursor choline restored youthful mitochondrial structure and function within two days. The study integrated worm experiments, human cell data, and aging datasets, suggesting that lipid changes—not just genetic damage—drive mitochondrial aging and that dietary or metabolic interventions could modestly slow aging, though translation to humans requires further work.
Researchers link age-related loss of the lipid phosphatidylcholine to fragmented mitochondrial networks and reduced cellular energy, but boosting this lipid (or its precursor choline) reversed mitochondrial aging and improved energy in aging C. elegans within days. The study, spanning worms, human cells, and clinical data, suggests dietary or metabolic interventions could support healthy aging, notes sex-specific lipid shifts around menopause, and highlights distinct aging phases—though application to humans awaits further research.
A new study suggests that marathon runners rely on myelin, the fatty tissue around nerve fibers, as a source of energy during races. Researchers found that brain scans of runners immediately after a marathon showed a significant decrease in myelin levels, which then recovered within two weeks. This discovery could have therapeutic implications for developing treatments for conditions involving myelin loss. The researchers emphasize that running is not bad for the brain and suggest that using and replenishing energy reserves through running may actually benefit brain function.