Acute Sleep Loss Increases Circulating Morning Levels of Two MicroRNAs Implicated in Neurodegenerative Disease in...

Area of Science:

• Neuroscience
• Molecular Biology
• Sleep Science

Background:

• Chronic sleep disruption and shift work are linked to increased risk of neurodegeneration and Alzheimer's disease (AD).
• The impact of sleep loss on circulating microRNAs (miRNAs), which are implicated in neurodegeneration, is not well understood.
• Specific miRNAs, including miR-127-3p, miR-132-3p, and miR-142-3p, are involved in neurodegeneration, AD, sleep, and circadian regulation.

Purpose of the Study:

• To investigate the effects of acute sleep deprivation (overnight wakefulness) on plasma levels of specific miRNAs.
• To explore the potential role of these miRNAs as molecular markers linking sleep loss to neurodegenerative processes.

Main Methods:

• A controlled in-lab study involving 15 healthy young men.
• Participants underwent two conditions in a randomized order: a night of normal sleep and a night of sustained wakefulness.
• Plasma samples were collected in the morning after each condition to measure levels of miR-127-3p, miR-132-3p, and miR-142-3p.

Main Results:

• Plasma levels of miR-127-3p and miR-142-3p were significantly elevated after a single night of wakefulness compared to after a night of sleep.
• These miRNA changes were not correlated with increased self-reported stress levels following wakefulness.
• This is the first study to show that one night of wakefulness elevates circulating miR-127-3p and miR-142-3p in humans.

Conclusions:

• A single night of sleep deprivation significantly increases circulating levels of miR-127-3p and miR-142-3p.
• These findings suggest a potential molecular pathway connecting sleep loss to neurodegenerative risk.
• Further research is warranted to confirm these results in larger cohorts and explore their implications for Alzheimer's disease and other neurodegenerative conditions.