저산소증 상태에서 정상임신과 임신중독증 환자의 태반 조직 내 endothelin-1 (ET-1) 발현의 비교
Comparison of placental endothelin-1 (ET-1) expression under hypoxic condition between normal versus preeclamptic pregnancy
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=목적: 본 연구는 explant villous culture model을 이용하여 저산소증 상태에서의 정상 임신과 임신중독증 산모의 태반조직 내의 ET-1 발현을 비교하고자 하였다. 연구 방법: 정상 산모 (n=5)와 임신중독증 산모 (n=4)로부터 얻은 태반으로부터 융모절편을 저산소 배양기에서 배양하거나 배양액에 deferoxamine (DFO)을 처리하였다. 융모절편 내 ET-1 mRNA 발현은 저산소 배양기에서 배양한 경우 0, 24, 48시간째, DFO를 사용한 경우 약물 투여 0, 2, 4, 6시간째 RT-PCR을 이용하여 측정하였다. 배양액 내 ET-1 단백 농도 측정은 enzyme immunoassay 방법을 이용하였다. 결과: 저산소 배양기에서 배양된 융모절편의 경우 두 군 모두에서 융모절편내 ET-1 유전자 발현과 배양액 내 ET-1 단백이 증가되었는데 (p<0.05), 증가 정도가 정상 산모에 비해 임신중독증 산모에서 더 큰 양상을 보였다. DFO로 처리하였을 때 ET-1 mRNA 발현은 두 군 모두에서 시간에 따라 증가되었다. DFO 투여 2, 4, 6시간째의 배양액 내 ET-1 단백 농도는 질환군에서 유의하게 높았으며 (p<0.05), DFO 투여 후 2시간까지, 2시간에서 4시간까지의 ET-1 단백의 증가의 폭이 질환군에서 유의하게 높았다. (p<0.05).
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