A case-control study of spermidine in obstructive sleep apnea

Area of Science:

• Biochemistry
• Sleep Medicine
• Molecular Biology

Background:

• Obstructive sleep apnea (OSA) is a prevalent sleep disorder with an unclear etiology.
• Polyamines, such as spermidine, are biologically significant molecules found across organisms.
• Existing literature suggests a link between sleep disorders and polyamines, with oxidative stress as a potential common factor.

Purpose of the Study:

• To investigate serum spermidine levels in patients diagnosed with obstructive sleep apnea (OSA).
• To compare spermidine levels between OSA patients and a healthy control group.
• To explore potential correlations between spermidine levels and OSA severity.

Main Methods:

• A cross-sectional case-control study involving 69 participants referred for polysomnography.
• Participants were categorized into control (Apnea Hypopnea Index [AHI] < 5) and OSA (AHI ≥ 5) groups.
• Serum spermidine levels were quantified using an enzyme-linked immunosorbent assay (ELISA) kit.

Main Results:

• No statistically significant difference in serum spermidine levels was observed between OSA patients and controls after adjusting for age, BMI, and gender.
• No significant correlation was found between AHI scores and serum spermidine levels.
• The area under the ROC curve for spermidine was 0.635, indicating limited diagnostic potential.

Conclusions:

• Serum spermidine levels in OSA patients are influenced by age, BMI, and gender.
• The direct relationship between spermidine and OSA requires further investigation.
• Future studies should focus on more homogenous cohorts to elucidate the role of polyamines in OSA pathogenesis.