New Study Links Abnormal Sleep Duration to Faster Organ Aging

A newly published scientific study has established a critical connection between sleep duration and organ-specific biological aging. The research demonstrates that sleeping either too little, defined as fewer than six hours, or too much, defined as greater than eight hours, is associated with faster biological aging across nearly every organ in the human body.

According to the findings, the lowest levels of biological aging were specifically observed in individuals who maintain a sleep duration between 6.4 and 7.8 hours daily. Junhao Wen, an assistant professor of radiology at the Columbia University Vagelos College of Physicians and Surgeons, noted the broader implications of these findings regarding human physiology.

'Previous studies have found that sleep is largely linked to aging and the pathological burden of the brain,' stated Junhao Wen. 'Our study goes further and shows that too little and too much sleep are associated with faster aging in nearly every organ, supporting the idea that sleep is important in maintaining organ health within a coordinated brain-body network, including metabolic balance and a healthy immune system.'

The researchers utilized comprehensive data derived from about half a million participants in the UK Biobank. The investigation relied upon twenty-three distinct aging clocks that collectively cover seventeen organ systems. Junhao Wen explained the methodology, noting, 'In the liver, for example, we have an aging clock built with protein data, an aging clock of metabolic data, and an aging clock of imaging data. This allows us to see whether sleep is distinctively associated with aging clocks derived from multiple omics and molecular layers.'

Furthermore, the study documented specific health complications associated with these abnormal sleep patterns. Short sleep was significantly associated with depressive episodes, anxiety disorders, obesity, type 2 diabetes, hypertension, ischemic heart disease, and heart arrhythmias. Additionally, both short sleep and long sleep were linked to chronic obstructive pulmonary disease, asthma, and several digestive disorders such as gastritis and gastroesophageal reflux disease.

Highlighting the personal and clinical motivation behind the research, Junhao Wen added, 'I'm also a light sleeper and was getting worried about the effects on myself.' He further emphasized the translational value of the work, stating, 'Everyone is excited by these aging clocks and their ability to predict disease and mortality risk. But to me, the more exciting question is, can we link aging clocks to a lifestyle factor that can be modified in time to slow aging?' The researcher also pointed out that 'our study suggests there may be different biological pathways between long and short sleepers that lead to the same outcome, late-life depression, and we shouldn't treat them the same way.'