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Statins may reduce heart disease in people with sleep apnea

heart study
Credit: Pixabay/CC0 Public Domain

A new study by Columbia University researchers suggests that cholesterol-lowering drugs called statins have the potential to reduce heart disease in people with obstructive sleep apnea, regardless of the use of CPAP machines during the night. The study is published in the journal Annals of the American Thoracic Society.

CPAP () therapy improves sleep quality and reduces daytime fatigue in people with obstructive sleep apnea. But based on findings from several recent clinical trials, CPAP does not improve heart health as physicians originally hoped.

Alternative methods to reduce heart disease in sleep apnea patients are urgently needed, because the condition is known to triple the risk of having a , stroke, or another serious cardiovascular event.

Statins (a class of cholesterol-lowering drugs) may be one such method, according to the new study, led by Sanja Jelic, MD, associate professor of medicine at Columbia University Vagelos College of Physicians and Surgeons.

The study included 87 people with recently diagnosed obstructive sleep apnea who were being treated with CPAP. The patients were randomized to receive treatment with either or a placebo.

The researchers found that statins, but not CPAP, protected blood vessels against dangerous inflammatory changes that occur in people with the condition.

The researchers looked specifically at the CD59 protein, which keeps inflammation in check when stabilized in the blood vessels. A previous study by Jelic's team showed that CD59, which protects cells against complement (a group of proteins that promote inflammation) activity, is more stable when cholesterol is low. Among study participants, CD59 was stabilized after four weeks of cholesterol-lowering statin therapy, but not with CPAP alone.

"The effect we found with statins is important," says Jelic. "Inflammation in the is a key step in progression of cardiovascular disease, so anything that we can do to stabilize CD59 in these patients is likely to be beneficial for heart health."

CPAP increases levels of inflammatory protein

The researchers also found that CPAP, surprisingly, increases levels of angiopoietin-2, another protein associated with inflammation and heart disease. Elevated angiopoetin-2 is commonly seen in patients on but had never been documented among people using CPAP. In the study, statins lowered angiopoetin-2 levels in patients with obstructive sleep apnea.

"We still believe CPAP is very useful, since it improves sleep and reduces daytime fatigue," Jelic says. "But CPAP also seems to have negative effects on the cardiovascular system. We need to investigate whether we should use more conservative airway pressures or other less-utilized treatments like oral appliances to treat patients with obstructive sleep apnea."

Before physicians consider using statins to prevent in their sleep apnea patients, however, are needed to confirm that patients using statins will have fewer heart attacks and strokes in the long term, Jelic says.

Currently, statins are prescribed for only 8% to 13% of patients with .

More information: Riddhi Shah et al, Statins Restore Endothelial Protection against Complement Activity in Obstructive Sleep Apnea: A Randomized Trial, Annals of the American Thoracic Society (2023). DOI: 10.1513/AnnalsATS.202209-761OC

Citation: Statins may reduce heart disease in people with sleep apnea (2023, March 13) retrieved 23 April 2024 from
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