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中国应用生理学杂志 ›› 2016, Vol. 32 ›› Issue (5): 450-453.doi: 10.13459/j.cnki.cjap.2016.05.017

• 研究论文 • 上一篇    下一篇

胰腺p-STAT3在急性胰腺炎危重演变中的表达变化

史迎莉1, 刘芳1, 张晓芹1, 贾晓云2, 李涛1, 许小凡1, 张红1   

  1. 1. 陕西中医药大学医学科研实验中心, 咸阳 712046;
    2. 敦化市医院病理科, 吉林敦化 133700
  • 收稿日期:2016-03-01 修回日期:2016-05-20 出版日期:2016-09-28 发布日期:2018-06-20
  • 通讯作者: 张红,Tel:029-38183455;E-mail:zhangh1227@163.com E-mail:zhangh1227@163.com
  • 基金资助:
    陕西省科技厅自然科学基础研究项目(2010JM4023);咸阳市科技局自然科学基金资助项目(2011K13-06(1))

The roles and mechanisms of p-STAT3 signaling pathway in acute pancreatitis

SHI Ying-li1, LIU Fang1, ZHANG Xiao-qin1, JIA Xiao-yun2, LI Tao1, XU Xiao-fan1, ZHANG Hong1   

  1. 1. Medical Research Center, Shanxi University of Chinese Medicine, Xianyang 712046;
    2. Department of Pathology, Municipal Hospital of Dunhua City, Dunhua 133700, China
  • Received:2016-03-01 Revised:2016-05-20 Online:2016-09-28 Published:2018-06-20
  • Supported by:
    陕西省科技厅自然科学基础研究项目(2010JM4023);咸阳市科技局自然科学基金资助项目(2011K13-06(1))

摘要: 目的:检测信号转导与转录激活因子3(STAT3)在不同程度胰腺炎模型小鼠胰腺组织中表达的变化,探讨其在急性胰腺炎危重演变中的作用。方法:48只健康雄性balb/c小鼠随机分为3组(n=16):对照组(Con)、轻症急性胰腺炎(MAP)组、重症急性胰腺炎(SAP)组。Con组腹腔注射0.9% NaCl;MAP组腹腔注射雨蛙素;SAP组腹腔注射雨蛙素联合脂多糖;分别于造模后2 h、6 h检测血清淀粉酶的活性;分离胰腺、称重,计算胰腺湿重比;检测肺组织髓过氧化物酶(MPO)活性,评估炎细胞浸润肺组织的程度;HE染色切片,光镜下观察胰腺、肺组织病理学改变; Western blot法检测磷酸化STAT3(p-STAT3)的变化。结果:与Con组比较, MAP组和SAP组在各时间点血清淀粉酶活性和胰腺组织湿重比均升高(P<0.05);肺组织MPO活性显著升高(P<0.05),且SAP组肺MPO含量明显高于MAP组(P<0.01)。MAP组和SAP组,在造模后2 h,胰腺和肺均可见不同程度的病理学改变; SAP组在造模后2 h胰腺p-STAT3的表达最高,6 h表达有所减弱;MAP组各时间点仅有微量表达;Con组在各时间点为阴性表达。结论:p-STAT3在轻症急性胰腺炎和重症急性胰腺炎模型小鼠胰腺中的表达差异明显,说明重症急性胰腺炎的重症化与STAT3的活化关系密切;抑制STAT3活化将成为阻止急性胰腺炎重症化的靶点之一。

关键词: 急性胰腺炎, 信号转导和转录激活因子3, 病理组织学, 髓过氧化物酶, 小鼠

Abstract: Objective: To detect the expression ofsignal transducer and activator of transcription 3 (STAT3) in pancreatic tissue of the mouse model of pancreatitis, and to explore its role in the evolution of acute pancreatitis.Methods: Forty-eight healthy male balb/c mice were randomly divided into 3 groups (n=16):control group (Con) 0.09% NaCl, intraperitoneal injection; mild acute pancreatitis group (MAP) caerulein, intraperitoneal injection; severe acute pancreatitis group (SAP) caerulein plus lipopolysaccharide(LPS), intraperitoneal injection. The mice were sacrificed after 2 h and 6 h after intraperitoneall injection. Serum was isolated for amylase activity. Pancreatic was isolated and weighedto calculate the pancreatic wet weight ratio. Myeloperoxidase (MPO) activity was measured to assess the degree of inflammatory cell infiltration in lung tissue. Using HE staining, the pathological changes of pancreatic and lung were observed under the light microscope. The expression of phosphorylated STAT3 (p-STAT3) was detected by Western blot.Results: Compared with control group, serum amylase activity, pancreatic wet weight ratio and lung MPO activity were significantlyincreased (P<0.05) in MAP and SAP group at each time point, especially SAP group showed higher levels of MPO activity than that in MAP group (P<0.01). The pathological changes of pancreas and lung were observed after modeling in 2 h. Western blot showed the expression of p-STAT3 could be detected in SAP group, the level increased most significantly after modeling 2 h, and decreased slightly after 6 h. The level of p-STAT3 was low in MAP group and negative in Con group at each time point.Conclusion: The expression of p-STAT3 in MAP and SAP groups are significantly different from that in control group, which indicates that STAT3 isclosely related in acute pancreatitis. Inhibition of STAT3 activity is a potential target to alleviate acute pancreatitis progression.

Key words: acute pancreatitis, STAT3, histopathology, myeloperoxidase, mouse

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