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Thursday, July 27, 2017

Concerns that sleep apnea could impact healthspan

July 27, 2017


Illustration of obstruction of ventilation. Credit: Habib M’henni / public domain


The number of people with obstructive sleep apnea has steadily increased over the past two decades. The disorder, which causes a person to briefly stop breathing when asleep, affects over 100 million people globally and is estimated to be undiagnosed 80-90% of the time. Obesity and advanced age, which have been reported as risk factors, are also on the rise. Scientists are concerned because sleep apnea may diminish healthspan by aggravating several cardiovascular and neurodegenerative diseases. Researchers in Portugal explore this suspected relationship in an Opinion article published July 27 in Trends in Molecular Medicine.

"In this paper, we try to put together the information that led us to the controversial hypothesis that obstructive  accelerates , which has promoted debate and stimulated research in the field," says co-author Claudia Cavadas of the Center for Neuroscience and Cell Biology of the University of Coimbra. "We believe that by treating or stopping obstructive sleep apnea progression, we will not only improve patients' quality of life, but also delay health issues related to aging."
Sleep apnea can strike individuals of all ages, sexes, and body types, but people who are smokers, obese, older, male, or postmenopausal are most at risk. Often mistaken for snoring, sleep apnea patients choke or gasp during sleep when the airway involuntarily tightens. Low oxygen to the brain jolts the person awake in an attempt to normalize . The episodes last from a few seconds to minutes and can occur over 30 times an hour. The disorder is commonly treated with a CPAP machine, which pushes air into the airway so that it stays open throughout the night.
Left untreated, sleep apnea can cause several problems associated with poor sleep quality. Patients with the disorder report daytime fatigue, morning headaches, and memory or concentration issues. Emerging evidence also suggests untreated sleep apnea could be connected to more serious  such as , metabolic syndrome, Alzheimer's and Parkinson diseases, dementia, and type 2 diabetes. How sleep apnea is related to these conditions is debated, but Cavadas and her co-authors propose that prolonged disruptions in blood oxygen levels and  can generate stem cell exhaustion, epigenetic changes, increased inflammation, and other hallmarks of aging.
"Further studies are needed to clearly distinguish between correlative and causal observations in proposed links between , aging, and age-related disease," they write. "Moreover, the high rates of undiagnosed cases and the low level of public awareness on this  constitute a barrier that has been difficult to overcome."
The research team is working on the identification of biomarkers that will allow scientists to personalize diagnoses and increase treatment efficiency. "The next step in understanding sleep apnea in the future will be to dissect different subtypes of sleep apnea, likely defined by distinct pathophysiological mechanisms which may underlie different outcomes and predisposition to comorbidities," Cavadas says, "As human life expectancy increases, delaying the onset of age-related diseases becomes critical to our society."
More information: Laetitia S. Gaspar et al, Obstructive Sleep Apnea and Hallmarks of Aging, Trends in Molecular Medicine (2017).  DOI: 10.1016/j.molmed.2017.06.006 
Provided by: Cell Press
https://medicalxpress.com/news/2017-07-apnea-impact-healthspan.html

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