Summary
This controlled study found no significant difference in melatonin suppression responses to melanopsin-weighted light between euthymic bipolar I patients and healthy controls, challenging the hypothesis that light hypersensitivity is a biomarker of bipolar disorder. For lighting designers and clinicians, this suggests that standard circadian lighting protocols likely do not need to be specifically modified for bipolar I patients based on differential melatonin suppression sensitivity alone.
Key Findings
- No statistically significant difference in melatonin suppression to melanopsin-weighted light was found between bipolar I disorder patients and healthy controls.
- Results do not support light-induced melatonin supersensitivity as a valid endophenotype for bipolar I disorder.
- Study used a large cohort under highly controlled laboratory conditions, strengthening the reliability of the null finding.
Categories
Sleep & Circadian Health: Examines melatonin suppression responses to melanopsin-weighted light, directly relevant to circadian photosensitivity in bipolar disorder.
Mood & Mental Wellness: Tests whether light-induced melatonin supersensitivity is a valid endophenotype for bipolar I disorder.
The Science of Light: Uses melanopsin-weighted (melanopic) light stimuli under highly controlled laboratory conditions to assess photoreceptor-driven melatonin suppression.
Author(s)
P Ritter, F Wieland, DJ Skene, A Pfennig, M Weiss
Publication Year
2020
Number of Citations
23
Related Publications
Sleep & Circadian Health
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- The two‐process model of sleep regulation: a reappraisal
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Mood & Mental Wellness
- The two‐process model of sleep regulation: a reappraisal
- Protecting the melatonin rhythm through circadian healthy light exposure
- Effects of artificial dawn and morning blue light on daytime cognitive performance, well-being, cortisol and melatonin levels
- Light therapy and Alzheimer's disease and related dementia: past, present, and future
- The role of daylight for humans: gaps in current knowledge
The Science of Light
- Phototransduction by retinal ganglion cells that set the circadian clock
- Color appearance models
- The mammalian circadian timing system: organization and coordination of central and peripheral clocks
- Diminished pupillary light reflex at high irradiances in melanopsin-knockout mice
- Melanopsin is required for non-image-forming photic responses in blind mice