Obstructive sleep apnea risk and leukocyte telomere length in African Americans from the MH-GRID study

Purpose Shorter telomere length and obstructive sleep apnea are associated with increased oxidative stress and chronic inflammation, which are both considered leading causes of agerelated diseases. Different forms of sleep disordered breathing have been linked to telomere length although their relationship remains uncertain. The purpose of this study was to explore the associations between the risk of obstructive sleep apnea and telomere length in African Americans. Methods The analysis included 184 women and 122 men aged 30-55 years from the Morehouse School of Medicine Study. Relative TL (T/S ratio) was measured from peripheral blood leukocytes using quantitative real-time polymerase chain reaction. The Berlin questionnaire was used for OSA risk assessments. Multivariable linear regression models were used to examine the associations between OSA risk and LTL. Results We observed that LTL varied by OSA risk in women (0.532 +/- 0.006 vs. 0.569 +/- 0.008) (p = 0.04). Multiple linear regression analysis confirmed that women at higher risk for OSA presented shorter LTL compared to those at lower risk, independent of age, income, education, obesity, smoking, alcohol consumption, and hypertension. These differences were not observed in men. Conclusions Our findings suggest that OSA risk may contribute to the acceleration of cellular aging processes through telomere shortening.