Time-restricted feeding attenuates age-related cardiac decline in Drosophila.
Level 5 - mechanism / opinion, no new human data
Preclinical laboratory research in an animal model (Drosophila melanogaster).
PubMed 25766238 · doi:10.1126/science.1256682
What was done
Researchers evaluated the physiological effects of daily 12-hour daytime time-restricted feeding (TRF) versus standard access on neural, peripheral, and cardiovascular function in fruit flies (*Drosophila melanogaster*). Mechanisms were assessed using temporal gene expression profiling and genetic validation.
What was found
TRF prevented body weight gain, improved sleep, and slowed cardiac aging markers even with caloric intake and activity remaining unchanged. Mechanistic analysis implicated the circadian clock, mitochondrial electron transport chain complexes, and the TCP-1 ring complex (TRiC) chaperonin. The abstract provides qualitative directional outcomes without quantitative effect sizes or numerical values.
Why it matters
This study shows that aligning feeding rhythms to a restricted daily window can improve organ physiology and mitigate age-related cardiac deterioration independent of total caloric intake in a model organism.
Limits
The study was conducted entirely in *Drosophila melanogaster*, limiting direct applicability to mammalian or human physiology. Specific sample sizes, effect sizes, statistical intervals, and exact dietary compositions were not reported in the abstract.
Cited by
- supports A 12-hour time-restricted feeding schedule in fruit flies prevents the age-related and high-fat diet-induced development of cardiac arrhythmia.
- supports Introducing a 12-hour time-restricted feeding protocol later in life in fruit flies reduces cardiac arrhythmia and improves heart rate variability parameters.
- supports A 12-hour time-restricted feeding protocol completely prevents the fragmented night sleep and daytime sleepiness that normally develops in 5-week-old fruit flies.
- supports Time-restricted feeding downregulates the expression of mitochondrial electron transport chain genes in fly heart cells, and genetic knockdown of ETC components improves cardiac function in flies.
- supports The ATP-dependent chaperonin complex CCT is required for the cardiac benefits of time-restricted feeding, and point mutations in CCT components predispose humans to heart disease.