Circadian clocks' interactions with oxygen sensing and signalling.
Level 5 - mechanism / opinion, no new human data
Narrative review of molecular and physiological mechanisms without primary empirical data or systematic review methodology.
PubMed 34984824 · doi:10.1111/apha.13770
What was done
Narrative review synthesizing published literature on the molecular and physiological interactions between mammalian circadian clock systems and HIF-1-mediated oxygen sensing and signalling under normal and pathological conditions.
What was found
The abstract reports no quantitative data or effect sizes. It qualitatively describes bidirectional crosstalk: circadian clocks regulate daily oscillations in oxygen levels, oxygen fluctuations can reset the molecular clock via HIF-1, and the circadian clock modulates cellular responses to hypoxia.
Why it matters
Understanding how oxygen sensing and circadian timing intersect helps clarify mammalian adaptive physiology and mechanisms underlying pathologies driven by hypoxia or circadian misalignment.
Limits
The abstract represents a broad narrative review without primary empirical data, systematic search parameters, or quantitative summary metrics. Findings are largely based on mechanistic and molecular models.
Cited by
- supports Oxygen dips naturally during sleep at night and serves as a circadian signal.