首都医科大学学报 ›› 2005, Vol. 26 ›› Issue (4): 467-470.

• 论著·临床研究 • 上一篇    下一篇

重组人类生长激素改善蛋白质营养不良机制的研究

文煜冰, 刘惠兰, 黄丽荣, 姚英   

  1. 首都医科大学附属复兴医院肾脏内科
  • 收稿日期:2004-03-01 修回日期:1900-01-01 出版日期:2005-08-24 发布日期:2005-08-24

Mechanisms of Recombinant Human Growth Hormone Improving Protein Malnutrition: a Study in Vitro

Wen Yubing, Liu Huilan, Huang Lirong, Yao Ying   

  1. Department of Nephrology, Fuxing Hospital, Capital University of Medical Sciences
  • Received:2004-03-01 Revised:1900-01-01 Online:2005-08-24 Published:2005-08-24

摘要:

目的 探讨重组人类生长激素(rhGH)对大鼠肝细胞所表达的部分营养指标的影响。方法 应用原位二步法制备肝脏单细胞悬液后进行细胞培养,在培养液中加入rhGH,分别检测分泌性白蛋白(Alb)、转铁蛋白(Trf)、胰岛素样生长因子-Ⅰ(IGF-Ⅰ)、IGF结合蛋白-1(IGFBP-1)和IGF结合蛋白-3(IGFBP-3)的表达量。结果 1)rhGH组的Alb、Trf、IGF-Ⅰ均显著高于对照组,2组比较差异有统计学意义(P<0.01).2)rhGH组的IGFBP-1明显低于对照组,而IGFBP-3则明显高于对照组,2组比较差异有统计学意义(P<0.05)。结论 rhGH明显增加肝细胞的分泌性Alb、Trf、IGF-I等营养指标的合成和(或)分泌,明显抑制肝细胞对IGFBP-1的合成,显著上调IGFBP-3的表达.

关键词: 重组人类生长激素, 蛋白质营养不良, 肝细胞

Abstract:

Objective To investigate the effects of rhGH on biosynthesis and secretion of secretory albumin, transferrin, insulin-like growth factor-Ⅰ(IGF-Ⅰ), insulin-like growth factor binding protein-1, -3(IGFBP-1, IGFBP-3) of primary cultured hepatocytes and liver non-parenchymal cells of rat.Methods Rat hepatocytes and liver non-parenchymal cells are isolated by two-step procedures in situ. RhGH is added to the medium and the vehicle is added for control. Albumin and transferrin of medium are measured with sandwich ELISA. IGF-Ⅰ, IGFBP-1, and IGFBP-3 in cells lysate are analyzed by Western Blotting.Results The medium concentrations of albumin and transferrin and the IGF-Ⅰ level in cells lysate are significantly higher in rhGH group than in control group, all P <0.01. The IGFBP-1 level in cells lysate is significantly lower and IGFBP-3 level is significantly higher in rhGH group than in control group, both P <0.05.Conclusion rhGH increases biosynthesis and/or secretion of secretory albumin, transferrin, and IGF-I et al. And rhGH inhibits biosynthesis of IGFBP-1 in hepatocytes and enhances expression of IGFBP-3 in non-parenchymal liver cell significantly.

Key words: recombinant human growth hormone, protein malnutrition, hepatocyte

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