Some Twist of Molecular Circuitry Fast Forwards Overnight Sleep Hours: A Systematic Review of Natural Short Sleepers' Genes.
Level 5 - mechanism / opinion, no new human data
Systematic review synthesizing heterogeneous mechanistic, animal (fly/mouse), cross-sectional, and case report literature
PubMed 34722012 · doi:10.7759/cureus.19045
What was done
A systematic review was conducted across PubMed, PMC, Scopus, and ResearchGate without date restrictions to identify genetic mutations linked to natural short sleep behavior. A total of 12 articles were analyzed: four combined human and animal transgenic model studies, four animal studies, two human cross-sectional studies, one review, and one case report.
What was found
The abstract reports no aggregate quantitative effect sizes or statistical metrics. It identifies intrinsic point mutations and single null mutations in DEC2, NPSR1, mGluR1, and β1-AR genes that correlate with natural short sleep behavior in humans and transgenic mouse or fly models without associated health deficits. One included case study also described an extrinsically triggered short sleep phenotype in an older man without a family history.
Why it matters
This review collates the specific genetic mutations and molecular circuitry implicated in natural short sleep duration, highlighting potential targets for future therapeutic sleep modulation.
Limits
The total evidence base is small (12 studies) and largely reliant on animal models (transgenic mice and flies) or uncontrolled observational human designs (case report and cross-sectional studies). Extrinsic non-genetic drivers were largely unmeasured across the included literature.
Cited by
- context Only about 3% of the population does well with less than seven hours of sleep per night.