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잦은 천명 증상의 재발과 혈장 내 VEGF 및 plasmin 조절 인자들과의 관련성

Association Between Plasma Vascular Endothelial Growth Factor, Plasmin System Regulators and Recurrent Early Wheeze

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참고문헌

주제분류소아과학

초록

목 적 : Vascular endothelial growth factor (VEGF)는 혈관 생성과 염증 물질의 혈관투과성 증가의 기전에 중요한 역할을 하는 것으로 알려져 있으며 혈전 용해 작용을 방해하는 주된 물질인 plasminogen activator inhibitor-1 (PAI-1) 역시 혈관 생성을 자극한다고 알려져 있다. 최근의 보고에 의하면 천식 환자들에서 혈중 VEGF와 PAI-1이 함께 증가하는 양상이 관찰되고 있다. 저자들은 급성 천명 증상으로 입원한 환아들의 혈장내에서 sVEGF, PAI-1, tissue plasminogen activator (tPA) 및 endothelin (ET)-1 들이 증가하는지 관찰하였으며 천명 재발의 빈도와 관련하여 이들 측정치들의 차이가 있는지 알아보고자 하였다. 방 법 : 급성 천명 증상으로 소아과에 입원한 2세에서 6세 사이의 58명의 소아들을 대상으로 하였으며 이들을 입원 이전 1 년간의 천명 증상의 재발 빈도를 기준으로, 제 1군(3회 이상인 군, 34명)과 제 2군(1회 이하인 군, 24명)의 두 군으로 분류하였다. 두 환아군에서 입원시 채취한 혈액에서 혈장을 분리하였으며 ELISA 방법으로 sVEGF, PAI-1, ET-1, tPA의 농도를 측정하여 두 군간 그리고 같은 연령의 대조군(16명)과 비교하였다. 결 과 : 혈장 내 VEGF, PAI-1 및 tPA는 급성 천명 증상을 보인 환아군에서 대조군에 비해 유의하게 높았으며 제 1군에서 제 2군보다 유의하게 높은 측정치를 보였다. 그러나 ET-1는 환아군 간 또 대조군에 비해 유의한 차이를 보이지 않았다. 결 론 : VEGF와 plasmin system의 조절인자인 PAI-1 및 tPA는 잦은 천명의 재발을 나타내는 환아들에서 기도 염증 반응에 중요한 역할을 하며 이후 천식으로 진행하게 되는 기전에 기여할 가능성이 있음을 시사하는 것으로 생각된다.

Abstract

Purpose : Vascular endothelial growth factor (VEGF) is known to play an important role in the process of angiogenesis and chronic inflammation. Plasminogen activator inhibitor (PAI)-1 and tissue plasminogen activator (tPA) are main regulators of the plasmin system. The functions of these components are shown to be closely associated and recent studies have reported their potential roles in the asthmatic airways. We determined plasma levels of soluble VEGF (sVEGF), PAI-1, tPA and endothelin (ET)-1 in children with recurrent early wheeze. Our purpose was to examine whether there would be any difference in these biomarkers in relation to the relapse rate of wheezing. Methods : Fifty-eight children aged 2-6 years who were admitted with acute wheezing were enrolled. They were divided into two groups: patients with more than three relapses of wheezing (group 1, n=34) and those with less than one relapse (group 2, n=24). Plasma levels of sVEGF, PAI-1, ET-1 and tPA on admission were measured using ELISA in the two patient groups and controls (n=16). Results : PAI-1, sVEGF and tPA significantly increased during acute wheezing episode. The levels of these biomarkers were significantly higher in group 1 than in group 2 (P<0.01). ET-1 showed no significant difference between the patient groups and controls. Conclusion : Our study showed significantly elevated plasma levels of sVEGF and plasmin system regulators in children with recurrent early wheeze, which was even higher in the group with more frequent relapses. Our results suggest that these biomarkers may be associated with airway inflammation and may contribute to the later development of asthma in these children.

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관련 논문AI추천

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