Liver clock: Malalignment and entrainment therapeutics.
Level 5 - mechanism / opinion, no new human data
Narrative review without systematic methodology or original human data
PubMed 41809216 · doi:10.4292/wjgpt.v17.i1.112588
What was done
The authors conducted a narrative review summarizing the molecular mechanisms underlying the mammalian central circadian clock (suprachiasmatic nucleus) and peripheral liver clock. They evaluated the drivers of circadian malalignment and reviewed therapeutic strategies for realignment, including time-restricted eating, light therapy, temperature control, and melatonin agonists.
What was found
The abstract reports that the liver clock regulates the expression of 10% to 15% of the transcriptome, including key metabolic genes. Central clocks are primarily entrained by light via the retinohypothalamic tract, whereas liver clocks respond to feeding cycles and nutrient availability. No specific clinical trial outcome numbers or effect sizes are reported in the abstract.
Why it matters
It provides a conceptual overview of how peripheral metabolic clocks interact with central circadian pacemakers and identifies lifestyle and pharmacological targets to counter circadian-related metabolic disease.
Limits
The review provides no systematic search methodology, risk-of-bias assessment, or quantitative meta-analytic pooling. No original empirical data or human trial sample sizes are reported in the abstract.
Cited by
- context Between 10% and 15% of the human protein-coding genome is regulated by circadian clocks, and 40% to 50% of those genes are involved in metabolism.