Influence of Obstructive Sleep Apnea on Soluble Intercellular Adhesion Molecule-1 and Vascular Endothelial Growth Factor

폐쇄성 수면 무호흡이 Soluble Intercellular Adhesion Molecule-1과 Vascular Endothelial Growth Factor에 미치는 영향

  • Kim, Jeong Pyo (Department of Internal Medicine, The Catholic University of Korea, College of Medicine) ;
  • Lee, Sang Haak (Department of Internal Medicine, The Catholic University of Korea, College of Medicine) ;
  • Kwon, Soon Seog (Department of Internal Medicine, The Catholic University of Korea, College of Medicine) ;
  • Kim, Young Kyun (Department of Internal Medicine, The Catholic University of Korea, College of Medicine) ;
  • Kim, Kwan Hyoung (Department of Internal Medicine, The Catholic University of Korea, College of Medicine) ;
  • Song, Jeong Sup (Department of Internal Medicine, The Catholic University of Korea, College of Medicine) ;
  • Park, Sung Hak (Department of Internal Medicine, The Catholic University of Korea, College of Medicine) ;
  • Moon, Hwa Sik (Department of Internal Medicine, The Catholic University of Korea, College of Medicine)
  • 김정표 (가톨릭대학교 의과대학 내과학교실) ;
  • 이상학 (가톨릭대학교 의과대학 내과학교실) ;
  • 권순석 (가톨릭대학교 의과대학 내과학교실) ;
  • 김영균 (가톨릭대학교 의과대학 내과학교실) ;
  • 김관형 (가톨릭대학교 의과대학 내과학교실) ;
  • 송정섭 (가톨릭대학교 의과대학 내과학교실) ;
  • 박성학 (가톨릭대학교 의과대학 내과학교실) ;
  • 문화식 (가톨릭대학교 의과대학 내과학교실)
  • Published : 2004.04.30

Abstract

Background : Obstructive sleep apnea is a contributory factor of hypertension, arrhythmia, ischemic heart disease and other cardiovascular diseases. However, the pathophysiology underlying this relationship is unclear. Recent reports have shown that the soluble intercellular adhesion molecule-1(sICAM-1) and vascular endothelial growth factor(VEGF) are involved in the initiation and progression of atherosclerosis, and some reports state that increased levels of these cytokines are found in patients with obstructive sleep apnea. In this study, the levels of sICAM-1 and VEGF were measured in patients with obstructive sleep apnea in order to determine if obstructive sleep apnea is involved in the pathophysiology of cardiovascular diseases. Methods : Thirty-seven patients were chosen amongst a population who visited the Sleep Disorders Clinic of St. Paul's Hospital in Seoul, Korea for a diagnosis of obstructive sleep apnea and who had subsequently undergone an overnight polysomnography at the clinic. The sera from these patients were retrieved after an overnight polysomnography session and the samples were kept at $-70^{\circ}C$. The cytokine levels were determined with ELISA and the relationships between the serum levels of sICAM-1 and VEGF along with polysomnography parameters were analyzed. Results : No statistically significant correlation was observed between the sICAM-1 levels and the apnea-hypopnea index(r=0.27, P>0.05). Positive correlations were found between the apnea-hypopnea index and serum VEGF levels (r=0.50, P<0.01), the apnea index and the serum sICAM-1 levels (r=0.31, P<0.01), and the apnea index and the serum VEGF levels (r=0.45, P<0.01). Conclusions : Obstructive apnea or hypopnea leads to an increase in the sICAM-1 and VEGF levels. Such an increase in the cytokine levels most likely leads to the higher incidence of cardiovascular diseases observed in patients with obstructive sleep apnea.

연구배경 : 폐쇄성 수면 무호흡 증후군은 고혈압과 심부정맥 및 허혈성 심질환 등의 심혈관질환을 일으키는 위험요소로 알려져 있으나 정확한 기전에 대해서는 아직 확실히 밝혀져 있지 않다. 최근에 soluble intercellular adhesion molecule-1(sICAM-1)과 vascular endothelial growth factor(VEGF)가 죽상경화증의 발생과 진행에 관여한다고 알려지면서, 일부 연구에서는 이러한 사이토카인이 폐쇄성 수면 무호흡 증후군에서도 증가한다고 보고하였다. 저자는 폐쇄성 수면 무호흡 증후군 환자에서 sICAM-1과 VEGF의 농도 변화를 관찰함으로써, 이들 환자에서 동반될 수 있는 심혈관질환 발생의 병태생리를 일부 이해하고자 하였다. 방 법 : 폐쇄성 수면 무호흡 증후군을 진단하기 위해 가톨릭대학교 성바오로병원 수면장애크리닉을 방문하여 수면다원검사를 시행한 37명을 대상으로 하였다. 철야 수면다원검사를 종료한 직후 혈액 채취를 한 후 혈청분리를 하여 $-70^{\circ}C$ 냉장고에 보관하였다. 사이토카인의 측정은 ELISA 방법으로 시행하였고 수면다원검사의 각 지표와 혈청 sICAM-1 농도 및 혈청 VEGF 농도와의 상관 관계를 비교 분석하였다. 결 과 : 무호흡-저호흡지수와 혈청 sICAM-1 농도 사이에는 유의한 상관관계가 없었지만(r=0.27, P>0.05), 무호흡-저호흡지수와 혈청 VEGF 농도는 유의한 상관관계가 있었다(r=0.50, P<0.01). 무호흡지수와 혈청 sICAM-1 농도는 다소 유의한 상관관계가 있었으며(r=0.31, P<0.01) 무호흡지수와 혈청 VEGF 농도 사이에는 유의한 상관관계가 있었다(r=0.45, P<0.01). 결 론 : 폐쇄성 수면 무호흡 혹은 저호흡은 혈청내 sICAM-1 및 VEGF 농도를 증가시키는 것을 알 수 있었으며, 이러한 사이토카인의 발현 증가는 폐쇄성 수면무호흡 증군 환자에서 심혈관질환의 발생에 관련이 있을 것으로 추측된다.

Keywords

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