重组人生长激素对急性心肌梗死大鼠心肌血管生成的影响Effect of rh-GH on myocardial angiogenesis of rats with acute myocardial infarction
殷宪刚,张玉梅,吴宝川,邵建华
摘要(Abstract)：
目的探讨肌肉注射重组人生长激素(rhGH)对急性心肌梗死(AMI)大鼠心肌血管生成及相关生长因子———血管内皮细胞生长因子(VEGF)、碱性成纤维细胞生长因子(bFGF)的影响。方法50只Wistar大鼠经10%戊巴比妥钠麻醉后开胸,剪开心包腔,做左冠状动脉前降支结扎术致其发生AMI,术后24h存活者37只被随机分为rhGH治疗组(19只)和对照组(18只)。治疗组以rhGH0.25U(kg·d)×3周肌注,对照组予同等容积的生理盐水肌注,3周后处死大鼠,开胸经升主动脉向冠状动脉内灌注10%甲醛20～30min固定心脏,心脏标本经切片处理。分别测定血浆和心肌的VEGF、bFGF的量及左心室梗死区周围毛细血管密度。结果(1)治疗组与对照组在AMI后3周其血浆bFGF、VEGF浓度均较实验开始时明显增加。治疗组较对照组升高更加显著,分别为69±5vs36±4(P<0.05)和47±5vs32±6(P<0.05)。(2)大鼠心肌内bFGF及VEGF治疗组均较对照组高,分别为79±7vs31±3(P<0.01)和72±7vs39±7(P<0.01)。(3)血浆bFGF、VEGF的浓度与梗死区周围心肌内毛细血管密度呈正相关(r分别为0.91和0.86,P<0.001),其回归方程分别为:毛细血管数=1.85bFGF-18.526;毛细血管数=1.249VEGF+6.127。结论rhGH促进AMI大鼠心肌细胞生长因子bFGF和VEGF的表达和分泌,提高缺血心肌局部及血液中bFGF和VEGF的浓度,促进梗死区周围毛细血管的生成。
关键词(KeyWords)： 人生长激素;心肌梗死;细胞因子类
基金项目(Foundation):
作者(Author): 殷宪刚,张玉梅,吴宝川,邵建华
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