생명과학회지 (Journal of Life Science)

  • 제14권2호
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  • Pages.263-268
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  • 2004
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  • 1225-9918(pISSN)
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  • 2287-3406(eISSN)
한국생명과학회 (Korean Society of Life Science)
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혈관내피세포의 발아에 미치는 fibroblast growth factor-2의 효과

Effect of Fibroblast Growth Factor-2 on the Sprouting in Vascular Endothelial Cells

  • 김환규 (전북대학교 자연과학대학 생물과학부)
  • 발행 : 2004.04.01
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초록

본 연구에서는 FGF-2를 이용하여 혈관내피세포의 발아와 단백질분해효소의 분비 및 인테그린과의 관계를 관찰하여 다음과 같은 결과를 얻었다. PPAECs 세포의 발아에 미치는 FGF-2의 효과를 조사한 결과, 10 ng/ml에서 약 3.5배 증가되는 등 농도-의존적으로 발아가 증가되었다. MMPs에 대한 enzyme immunoassay결과, MMP-2에서만 약 1.9배의 분비증가가 유도되었다. MMP-1 및 MMP-3는 FGF-2에 의해 유의할만한 분비 증가가 나타나지 않았으며, 특이하게 MMP-3는 FGF-2의 처리 없이도 많은 양이 분비되었고, MMP-9은 0.6∼1.2 ng/$10^{6}$ cells 정도로 분비량이 적었다. FGF-2에 의한 플라스민의 분비증가 여부를 확인한 결과, 10 ng/ml에서 약 2.6배 증가하였으며, MMPs 억제제 및 인테그린 억제제에 의해 유의할만한 감소가 나타났고 플라스민 억제제인 $\alpha$2-antiplasmin에 의해서는 플라스민의 분비가 완전히 억제되었다. 또한, FGF-2 처리에 의해 농도-의존적으로 인테그린 Mac-1의 발현이 증가되었으며, 인테그린 억제제인 IS201를 전처리한 결과, 인테그린 Mac-1의 발현이 완전히 억제되었다. FGF-2에 의한 발아 유도효과는 IS201 처리에 의해 거의 완벽하게 억제되었으며, MMP-2 및 플라스민의 분비도 유의할만하게 감소시켰다. 이상의 결과를 요약하면, FGF-2에 의해 유도된 혈관내피세포의 발아 증가는 MMP-2 및 플라스민의 분비증가와 인테그린 Mac-1의 발현 증가에 의한 것이라 생각된다.

The sprouting of vascular endothelial cells is an initial step in angiogenesis. Matrix metalloproteinases can associate with integrin on the surface of endothelial cells, thereby promoting angiogenesis. The purpose of this study was to test if fibroblast growth factor-2 (FGF-2) can regulate the sprouting in porcine pulmonary artery endothelial cells. FGF-2 induced sprouting and secretion of MMP-2 and plasmin. FGF-2 also induced the expression of integrin Mac-1, which is inhibited IS20I. Addition of BB-94, a 2-antiplasmin and IS20I inhibited FGF-2-induced sprouting activity. Therefore, FGF-2-induced sprouting activity in PPAECs may be accomplished by secretion of proteinases such as MMP-2 and plasmin and integrin expression.

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