The Changes of Plasma Atrial Natriuretic Peptide Concentrations During Waking and Sleep in Patients with Obstructive Sleep Apnea Syndrome

폐쇄성 수면 무호흡증후군 환자에서 각성시와 수면중의 혈중 Atrial Natriuretic Peptide 농도 변화

Objectives : Patients with obstructive sleep apnea syndrome(OSAS) often complain of nocturnal enuresis. There are a few reports that OSAS patients have altered renal function, and there are some evidences that the increased release of atrial natriuretic peptide(ANP) may be involved in the pathogenesis of nocturnal urinary symptoms of OSAS patients. In this study, we measured plasma ANP concentrations during waking and sleep in OSAS patients and normal controls to investigate whether there were differences of ANP concentrations between OSAS patients and normal subjects. Methods : 27 patients with OSAS and 10 normal subjects were studied. All subjects underwent a full-night polysomnographic study. Venous blood samples were separately drawn during waking and sleep. Plasma ANP concentrations were measured using radioimmunoassay. Results : In OSAS patients, ANP concentrations during sleep($122.9\;{\pm}\;29.9pg/ml$) were significantly higher than ANP concentrations during waking($60.2\;{\pm}\;5.8pg/ml$)(p < 0.05). However, in normal subjects, there was no significant difference between ANP concentrations during waking($59.2\;{\pm}\;5.7pg/ml$) and sleep($69.6\;{\pm}\;3.0pg/ml$)(p > 0.05). There was no significant difference of ANP concentrations during waking between OSAS patients($60.2\;{\pm}\;5.8pg/ml$) and normal controls($59.2\;{\pm}\;5.7pg/ml$)(p > 0.05), and also there was no significant difference during sleep between OSAS patients($122.9\;{\pm}\;29.9pg/ml$) and normal subjects($69.6\;{\pm}\;3.0pg/ml$)(p > 0.05). Plasma ANP concentrations during sleep showed significant positive correlations with apnea index(r = 0.3846, p < 0.05) and respiratory disturbance index(r = 0.3939, p < 0.05) in OSAS patients. Conclusion : These data suggest that, in OSAS patients, plasma ANP concentrations during sleep are significantly higher than plasma ANP concentrations during waking, and there is a positive correlation between the plasma ANP concentration during sleep and the severity of sleep apnea.

폐쇄성 수면 무호흡증후군 환자는 정상인과 달리 각성시보다 수면중에 뇨량과 나트륨 뇨배설이 증가하며 이러한 현상은 atrial natriuretic peptide(ANP)의 분비반응과 관련이 있을 것으로 보고된 바 있다. 저자들은 수면다원검사를 통해 폐쇄성 수면 무호흡증후군으로 확진된 환자군과 정상 대조군을 대상으로 각성시와 수면중에 말초 정맥혈로부터 혈중 ANP 농도를 측정하여 다음과 같은 결과를 얻었다. 1) 폐쇄성 수면 무호흡증후군 환자군에서는 수면전 ANP 농도 ($60.2\;{\pm}\;5.8pg/ml$)에 비해 수변중 ANP 농도 ($122.9\;{\pm}\;29.9pg/ml$)가 통계적으로 유의하게 높았으나(p <0.05), 대조군에서는 수면전 ANP 농도($59.2\;{\pm}\;5.7pg/ml$)와 수면중 ANP 농도($69.6\;{\pm}\;3.0pg/ml$) 사이에 유의한 차이가 없었다(p> 0.05). 2) 수면전 ANP 농도는 폐쇄성 수면 무호흡증후군 환자군($60.2\;{\pm}\;5.8pg/ml$)과 대조군($59.2\;{\pm}\;5.7pg/ml$) 사이에 통계적으로 유의한 차이가 없었고(p > 0.05), 수면 중 ANP 농도 역시 환자군($122.9\;{\pm}\;29.9pg/ml$)과 대조군 ($69.6\;{\pm}\;3.0pg/ml$) 사이에 유의한 차이가 없었다(p > 0.05). 3) 폐쇄성 수면 무호흡증후군 환자군에서 수면중 ANP 농도는 무호흡지수(r = 0.3846, p < 0.05) 및 호흡장애지수 (r = 0.3939, p < 0.05)와 통계적으로 유의한 상관관계를 보였다. 이상의 결과에서 저자들은 폐쇄성 수면 무호흡증후군 환자들은 각성시에 비해 수면중에 혈중 ANP 농도가 증가하며 ANP 농도의 증가는 무호흡지수 및 호흡장애지수와 상호 관련성이 있음을 관찰할 수 있었다.