›› 2006, Vol. 26 ›› Issue (3): 148-151.

• 论文 • 上一篇    下一篇

TNFα对小鼠骨骼肌和肝细胞膜胰岛素受体酪氨酸蛋白激酶活力影响

  

  1. 1.中国人民解放军第九四医院,南昌 330002;2.第三军医大学基础部生物化学与分子生物学教研室,重庆 400038;3.江西省实验动物学会,南昌 330006
  • 收稿日期:2006-05-31 出版日期:2006-09-25 发布日期:2006-09-25
  • 基金资助:

    江西省卫生科技计划资助项目(20052044)

Effects of TNFα on Activity of Tyrosine Protein Kinase of Membrane Insulin Receptor of Muscle and Liver in Mouse

  1. 1.The 94th Hospital of PLA, Nanchang 330002,China;2.The Department of Biochemistry and Molecular Biology, The Third Military Medical University, Chongqing 400038, China;3.The Institute of Laboratory Animal of Jiangxi, Nanchang 330006,China
  • Received:2006-05-31 Online:2006-09-25 Published:2006-09-25

摘要: 目的 观察肿瘤坏死因子α(TNFα)对KM小鼠骨骼肌和肝细胞膜胰岛素受体酪氨酸蛋白激酶(TPK)活力的影响。方法 80只清洁级KM小鼠随机分为TNFα高剂量连续注射组(TH组,n=20)、TNFα低剂量连续注射组(TL组,n=20)、TNFα高剂量一次注射组(T1组,n=20)和正常对照组(C组,n=20)。密度梯度离心分离组织细胞膜,麦胚凝集素(WGA)亲和柱层析纯化膜胰岛素受体,外源聚谷-酪多肽底物同位素32p掺入法测定酪氨酸蛋白激酶(TPK)活力,观察各组胰岛素刺激前后的离体骨骼肌和肝细胞膜胰岛素受体TPK活力变化。结果 1)TH和TL组基础(无胰岛素刺激)骨骼肌和肝细胞膜胰岛素受体TPK活力均明显低于C组,且TH组明显低于TL组(P均<0.01);2)TH组和TL组胰岛素刺激的骨骼肌和肝细胞膜胰岛素受体TPK活力变化值均明显低于C组,且TH组明显低于TL组,(P均<0.01);3)T1组无论基础还是胰岛素刺激的骨骼肌和肝细胞膜胰岛素受体TPK活力变化值均与C组无显著差别(P>0.05)。结论 TNFα可抑制组织细胞膜胰岛素受体TPK活力,在组织细胞膜胰岛素受体信号转导障碍中发挥重要作用。TNF α抑制组织细胞膜胰岛素受体TPK活力,需连续刺激,一次刺激作用效果不明显。

关键词: KM小鼠, TNFα, 胰岛素受体, 酪氨酸蛋白激酶, 胰岛素

Abstract: Objective To study the effects of TNFa on activity of TPK(tyrosine protein kinase) of the membrane insulin receptor of the muscle and liver in KM mouse. Methods Eighty KM mouse were divided randomly to the TH group(TNFa high-dose group), TL group(TNFa low-dose group), T1 group(TNFa once-dose group) and C group(control group).The activity of TPK of the membrane insulin receptor in the muscle and liver without and with insulin-stimulated in all groups were observed. Results l)The activity of the TPK of the membrane insulin receptor in the muscle and liver without insulin-stimulated of TH and TL group were both lower significantly than that of C group, and TH group were lower than that of TL group.2) The changes of activity of the TPK of the membrane insulin receptor in the muscle and liver caused by insulin-stimulated of TH and TL group were both lower significantly than that of C group,and TH group were lower than that of TL group. 3)There were no significant difference of TPK of the membrane insulin receptor in the muscle and liver of the T1 group and C group. Conclusion TNFa can suppress the activity of TPK of the membrane insulin receptor in muscle and liver, and the effects of TNFa depends on the dose and time of TNFa treatment.

Key words: KM mouse, TNFa, Insulin receptor, TPK, Insulin