방사선 조사에 의한 폐손상에서 Angiotensin-1 Converting Enzyme Inhibitor (Captopril)의 폐섬유화의 경감 효과
Reducing Effect of Angiotensin-1 Converting Enzyme Inhibitor (Captopril) in Fibrosis of Radiation Induced Lung Injury
권건영, 권선영, 김옥배, 김진희, 정혜라,
소속 상세정보
권건영 ( Kwon Kun-Young )
계명대학교 의과대학 병리학교실
권선영 ( Kwon Sun-Young )
계명대학교 의과대학 병리학교실
김옥배 ( Kim Ok-Bae )
계명대학교 의과대학 방사선종양학교실
김진희 ( Kim Jin-Hee )
계명대학교 의과대학 방사선종양학교실
정혜라 ( Jung Hae-Ra )
계명대학교 의과대학 병리학교실
KMID : 0357920040380030145
Abstract
Background: The captopril reduces radiation induced lung injury and fibrosis. We designed a study to evaluate the antifibrogenic effect of Captopril in radiation induced lung injury.
Methods: Fifty Sprague-Dawley rats were divided into radiation group (I) (n=30) and radiation plus captopril group (II) (n=15). The rats were sacrificed at 12 hours and 11 weeks after radiation. We examined light microscopic, immunohistochemical and electron microscopic features in each groups.
Results: In Group I, the lungs showed acute lung injury at 12 h. The lungs showed patchy fibrosis with collagen deposits at 11 weeks. The severity of the alveolar injury and fibrosis was correlated with radiation doses. The Group II showed less severe lung fibrosis than Group I. The mean numbers of mast cells and myofibroblasts of Group II were lower than Group I (p< 0.05). The TNF-α and TGF-β were higher expressed according to radiation doses in Group I, and less prominent in Group II. Ultrastructurally, the alveolar cell injury and fibrosis were less severe in Group II. The TUNEL stains showed higher expressions according to radiation doses in Group I, and expressed in Group II.
Conclusions: The captopril decreases the number of mast cells and myofibroblasts, reduces collagen deposition and apoptosis of alveolar cells in rat lungs after radiation, and so reduces the degree of pulmonary injury and fibrosis.
키워드
Captopril;Radiation;Lung Fibrosis;In situ Nick;End Labeling
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