苯丙酸诺龙对烧伤大鼠肝细胞白蛋白mRNA和雄激素受体表达的影响

目的　研究苯丙酸诺龙对烧伤大鼠肝细胞白蛋白影响的分子机制。　方法　将健康成年 Wistar大鼠 32只 (雌雄各半 )随机分成实验组和对照组各 16只 ,制成烫伤大鼠模型。采用随机对照设计 ,应用苯丙酸诺龙治疗大鼠 2 0 %体表面积深 度烫伤 ,分别于伤后第 4、7、14和 2 1天处死大鼠 ,留取肝组织 ,RNA一步法提取肝细胞总 RNA,逆转录 -聚合酶链反应 (RT- PCR)一步法扩增检测白蛋白 m RNA表达水平 ,免疫组织化学 Envision法显示检测肝细胞雄激素受体表达水平。　结果　实验组肝细胞白蛋白 m RNA和雄激素受体表达水平明显增高 ,在各时间点均明显高于同期对照组(P<0 .0 5 ) ,伤后第 7和 14天为快速增长时期 (P<0 .0 5 ) ,白蛋白 m RNA表达上调与雄激素受体表达上调有相关关系(r=0 .936 ,P<0 .0 5 )。　结论　苯丙酸诺龙能有效上调肝细胞白蛋白 m RNA和雄激素受体的表达水平 ,促进蛋白质合成 ,有利于逆转负氮平衡及创面愈合。

EFFECT OF NANDROLONE PHENYLPROPIONATE ON EXPRESSION OF HEPATIC ALBUMIN-mRNA AND ANDROGEN RECEPTOR IN BURNED RATS

Objective To study the mechanism of nandrolone phenylpropionate (NP) on hepatic albumin mRNA and androgen receptor(AR) in burned rats. Methods Thirty-two Wistar rats with a deep second-degree cutaneous burn of 20% total body surface area were randomly divided into two groups:NP group (experimental group, 5 mg/kg NP) and normal saline as control group every other day. The expression copy quantity of albumin-mRNA and mean integrated absorbency(mIA) of AR in liver tissue were measured by quantitative fluorescent RT-PCR and immunohistochemistry respectively on the 4th, 7th, 14th and 21st days of post-burned. Results The expression levels of albumin-mRNA and AR in liver tissue in NP group were much higher than those in control group. The albumin-mRNA and AR expression increased significantly (P<0.05) after 7 and 14 days, while the expression had no significant difference between NP group and control group on the 4th day. A positive correlation occurred between the expression level of albumin-mRNA and the quantity of AR in liver tissue(r=0.936, P<0.05). Conclusion Nandrolone phenylpropionate up-regulated respectively the expression of albumin-mRNA and the density of AR in liver tissue.