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纤维蛋白 原 在大鼠胸主动脉球囊成形术后肌内膜增殖中的作用 |
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刘京波 汪丽蕙 唐朝枢
摘 要 目的:探讨纤维蛋白(原)在大鼠胸主动脉球囊成形术后肌内膜增殖中的可能作用。方法:用生化方法检测术后血浆纤维蛋白原含量及用免疫组织化学方法。结果:纤维蛋白原含量在术后第1d组大鼠(3.85±0.30)g/L较假手术组大鼠(2.45±0.21)g/L明显升高(P<0.01),第3 d组(6.08±0.68)g/L又较第1d组显著升高(P<0.01),第7 d组(5.37±1.05)g/L较第3d组无明显下降(P>0.05),第14d组(3.86±1.09)g/L较第7d组已明显下降(P<0.01),第21 d组(3.10±0.26)g/L较第14d组有所下降(P<0.05)。免疫组化研究发现术后10min,纤维蛋白(原)即在血管腔表面沉积,然后逐渐渗入增殖的内膜中。术后早期降低血浆纤维蛋白原的水平,可抑制血管壁3H-TdR的掺入术后7 d,(289±147比1588±180)counts·min-1/mg,P<0.01;术后14d,(242±75比464±91)counts·min-1/mg,P<0.01)和肌内膜的增殖(内膜/中膜面积,0.12±0.05 比 0.36±0.10,P<0.01;内膜/中膜厚度,0.56±0.28 比 1.07±0.22,P<0.01)。结论:纤维蛋白(原)参与了血管损伤后的平滑肌细胞增殖,降低血浆纤维蛋白原含量可抑制术后肌内膜的增殖。 主题词 内皮,血管;纤维蛋白原;肌,平滑
The role of fibrinogen/fibrin in myointimal hyperplasia of rat s thoracic aorta by balloon angioplasty
LIU Jing-Bo,WANG Li-Hui,TANG Chao-Shu First Affiliated Hospital,Beijing Medical University,Beijing(100034)
Abstract AIM:To detect the role of fibrinogen/fibrin in myointimal hyperplasia of rat s thoracic aorta by balloon angioplasty and find the possible mechanism for restenosis.METHODS:A vascular intimal hyperplasia model was established by balloon angioplasty of rat s thoracic aorta.Plasma fibrinogen level was measured with biochemical method,and immunohistochemical method.RESULTS:Plasma fibrinogen level in the lst day group(3.85±0.30)g/L,was higher than fibrinogen level in sham group (2.45±0.21)g/L, P<0.01, the 3rd day group (6.08±0.68)g/L was significantly higher than the 1st day group(P<0.01),the 7th day group(5.37±1.05)g/L was lower than the 3rd day group nonsignificantly (P>0.05),the 14 th day group(3.86±1.09)g/L was much lower than the 7th day group(P<0.01),and the 21st day group(3.10±0.26)g/L was also lower than the 14th day group(P<0.05).At 10 min after operation,fibrinogen/fibrin deposition in lumi[1] [2] [3] 下一页 上一个医学论文: 开颅减压治疗猫急性脑梗塞的实验研究 下一个医学论文: 氧自由基在肝缺血再灌注损伤中的作用及川芎嗪的影响
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