Catecholamine exposure and the gut microbiota in obstructive sleep apnea

Area of Science:

• Microbiome research
• Sleep medicine
• Cardiovascular health

Background:

• Obstructive sleep apnea (OSA) is linked to increased mortality from chronic inflammatory and cardiovascular diseases.
• Excess catecholamine exposure is implicated in OSA's disease associations, but the mechanism remains unclear.

Purpose of the Study:

• To test the hypothesis that increased catecholamine exposure is associated with Enterobacteriaceae abundance in patients with OSA.
• To investigate the relationship between norepinephrine and gut microbiota in OSA.

Main Methods:

• Compared urinary norepinephrine and fecal microbiota in 24 OSA patients and 23 controls.
• Analyzed community structure and Enterobacteriaceae abundance.
• Assessed longitudinal changes in relation to norepinephrine levels.

Main Results:

• OSA patients exhibited elevated urinary norepinephrine, indicating increased sympathetic activation.
• No significant differences in overall microbiome structure or Enterobacteriaceae abundance were found between OSA patients and controls.
• Longitudinal Enterobacteriaceae abundance changes in OSA patients were significantly associated with norepinephrine changes, an association absent in controls.

Conclusions:

• Preliminary evidence suggests an association between norepinephrine exposure and Enterobacteriaceae in individuals with disordered sleep.
• This finding may offer insights into the mechanisms linking OSA to cardiovascular and inflammatory diseases.