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중등도 이상의 급성 천식 환아에서 스테로이드 사용 후 객담 내 MMP-9과 TIMP-1의 변화

Changes of Matrix Metalloproteinase-9 and Tissue Inhibitor ofMatrix Metalloproteinase-1 in Sputum from Moderate to Severe Acute Asthma after Corticosteroid Therapy

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참고문헌

주제분류소아과학

초록

목 적 : 기관지천식은 기도의 염증성 질환으로 이들 세포의 활성 및 침윤에는 여러 유착분자, 사이토카인 및 케모카인등이 관여하는 것으로 되어 있다. 최근 matrix metalloproteinase-9 (MMP-9)이 기저막을 통한 염증세포의 이동에 중요한 역할을 하고 결체조직에서 분비되는 tissue inhibitor of matrix metalloproteinase-1 (TIMP-1)에 의해 그 기능이 억제되는 것으로 보고되고 있어 저자들은 중등도 이상의 급성 천식 환아에서 스테로이드 사용 전과 후 객담 내 MMP-9과 TIMP-1의 변화 및 이들이 FEV1 변화에 미치는 영향을 보고자 본 연구를 실시하였다.방 법 : 8세에서 15세 사이의 중등도 및 중증 급성 천식 환아 17명을 대상으로 입원 당일, 입원 7일째, 3개월 후 안정된 상태의 객담 내 MMP-9, TIMP-1을 측정하여 시간에 따른 변화를 관찰하였고, 스테로이드 사용 전과 3개월 후 FEV1을 측정하여 FEV1의 호전 정도와 MMP-9/TIMP-1 비와의 관계를 비교하였다. 결 과 : 객담 내 MMP-9는 입원 당일에 비해 입원 7일째, 3개월째 유의하게 낮았으며(P< 0.05), TIMP-1은 입원 당일에 비해 입원 7일째 유의하게 높게 나타났으나(P<0.05) 점차 감소하여 3개월째는 입원 7일째 비해 낮게 나타났으며(P<0.05), MMP-9/TIMP-1 비는 입원 당일에 비해 입원 7일째, 3개월째 순으로 점차 유의하게 감소하였다.(P<0.05) 안정상태의 MMP-9/TIM P-1 비는 스테로이드 치료 후의 FEV1 변화와 양의 상관관계가 있결 론:급성 천식 발작시 객담 내 MMP-9 치의 증가는 기도의 염증상태와 관련이 있고 이에 따른 TIMP-1의 증가는 기도의 섬유화에 관여하며 MMP-9/TIMP-1 비는 스테로이드에 대한 반응을 보는데 유용할 것으로 사료된다.음을 알 수 있었다.(r=0.65, P<0.05)

Abstract

Purpose : Bronchial asthma is an inflammatory respiratory disease characterized by the activation of inflammatory cells and its infiltration. It has been recently reported that MMP- 9 dose an importance role in the movement of inflammatory cells through basal membrane, that the function may be suppressed by TIMP-1. We studied to know the change of MMP-9 and TIMP-1 in sputum before and after corticosteroid(CS) therapy, and the relation with MMP-9/TIMP-1 ratio and improvement of FEV1. Methods : Seventeen acute moderate to severe asthmatics were selected as was a control group of 17 healthy children. MMP-9 and TIMP-1 in sputum were measured on the 0 day, 7 days and 3 months later and observed as to the flow of time. FEV1 was measured before the CS therapy and 3 months later, and the change of FEV1 & FEV1 at 3 months were compared with the relation of MMP-9/TIMP-1 ratio. Results : Sputum MMP-9 was lowered more at 7 days and 3 months compared with 0 day(P<0.05). Sputum TIMP-1 was significantly high on 7 days(P<0.05) and then had a tendency to decrease until 3 months(P<0.05). MMP-9/TIMP-1 ratio decreased according to the flow of time(P<0.05). MMP-9/TIMP-1 ratio at 3 months closely correlated with the change of FEV1(r=0.65, P<0.05). Conclusion : These data suggest that the overproduction of MMP-9 after asthma exacerbation correlates with airway inflammation and TIMP-1 production might contribute to airway fibrosis. MMP-9/TIMP-1 ratio at 3 months correlates with improvement of pulmonary function after CS therapy.

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