摘要
目的 :观察c -fos在八肽胆囊收缩素 (CCK - 8)减轻脂多糖 (LPS)所致的肺动脉平滑肌细胞 (PASMC)损伤中的变化。方法 :贴块法培养大鼠PASMC。应用电镜技术和生化方法 ,观察细胞形态和测定细胞丙二醛 (MDA)含量及乳酸脱氢酶 (LDH)释放率 ;台盼蓝染色法记录PASMC蓝染率的变化 ;免疫细胞化学技术检测细胞内c -fos蛋白的表达情况。结果 :CCK - 8可减轻LPS引起的细胞超微结构损伤 ;CCK - 8可降低LPS引起的细胞台盼蓝摄取率、MDA含量与LDH释放率的增高 ;LPS可轻微上调PASMC内c-fos蛋白表达 ,CCK - 8可使该上调作用显著上升。结论 :CCK - 8可减轻LPS所致的PASMC损伤 ;CCK - 8可能通过使c -fos蛋白表达上调来发挥其抗损伤作用。
AIM: To observe the role of c-fos in the protection by cholecystokinin-octapeptide (CCK-8) against pulmonary artery smooth muscle cell (PASMC) injury induced by lipopolysaccharide (LPS). METHODS: The ultrastructure of PASMC was observed under transmission electron microscope (TEM). MDA content,LDH release and the rate of trypan blue in PASMC were measured,and immunocytochemistry technique was adopted to observe the c-fos protein expression. RESULTS: The TEM results showed significant PASMC structural injury in LPS group and alleviated structural changes in LPS+CCK-8 group. CCK-8 reduced the increase in the rate of trypan blue uptake,MDA content and LDH release in PASMC induced by LPS. LPS lightly increased c-fos protein expression,which was enhanced by CCK-8. CONCLUSION: CCK-8 attenuated the injury of PASMC induced by LPS,which may be concerned with the increase in c-fos protein expression.
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2003年第11期1468-1471,U002,共5页
Chinese Journal of Pathophysiology
基金
河北省自然科学基金资助项目 (No .30 2 4 90 )
