中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (41): 6171-6176.doi: 10.3969/j.issn.2095-4344.2016.41.014

• 干细胞移植 stem cell transplantation • 上一篇    下一篇

脂肪间充质干细胞移植治疗1型糖尿病模型大鼠的作用

刘小会   

  1. 天津市第四中心医院内分泌科,天津市  300140
  • 修回日期:2016-08-08 出版日期:2016-10-07 发布日期:2016-10-07
  • 作者简介:刘小会,女,1978年生,湖北省广水市人,汉族,2005年天津医科大学毕业,硕士,主治医师,主要从事内分泌研究。

Adipose-derived mesenchymal stem cell transplantation for type 1 diabetes in a rat model

Liu Xiao-hui   

  1. Department of Endocrinology, Tianjin Fourth Central Hospital, Tianjin 300140, China
  • Revised:2016-08-08 Online:2016-10-07 Published:2016-10-07
  • About author:Liu Xiao-hui, Master, Attending physician, Department of Endocrinology, Tianjin Fourth Central Hospital, Tianjin 300140, China

摘要:

文章快速阅读:

文题释义:
胰岛B细胞:
是胰岛细胞的一种,属内分泌细胞,能分泌胰岛素,与胰岛A细胞分泌的胰高血糖素一起起到调节血糖的作用。胰岛B细胞功能受损、胰岛素分泌绝对或相对不足(胰岛素抵抗),会使血糖升高,从而引发糖尿病。
PDX-1:又称胰十二指肠同源盒1,其参与胰腺早期发育和较晚期B细胞的分化,在成年机体内通过调节一系列基因的表达来维持B细胞的形态和正常功能,尤其是通过调控胰岛素及胰岛素相关基因如葡萄糖激酶、葡萄糖转运蛋白2等基因的表达,促进胰岛素分泌和维持胰岛B细胞的正常功能,其在胚胎期胰岛细胞发育、增殖、分化和成熟以及胰岛B细胞分泌功能的调节中扮演着重要角色。

 

摘要
背景:
干细胞移植是1型糖尿病比较有前景的治疗方法,脂肪间充质干细胞是继骨髓间充质干细胞后的又一研究热点。
目的:观察脂肪间充质干细胞移植对1型糖尿病大鼠的治疗作用。
方法:将45只SD大鼠随机分为正常组、模型组和细胞移植组,后2组采用链脲菌素腹腔注射建立1型糖尿病模型。造模后7 d,正常组腹腔静脉注射生理盐水,模型组腹腔静脉注射无血清的DMEM培养液,细胞移植组腹腔静脉注射脂肪间充质干细胞悬液。移植后2周,监测各组大鼠体质量、血糖水平,ELISA法检测各组大鼠胰岛素分泌量,RT-PCR检测胰腺组织PDX-1 mRNA的表达。
结果与结论:①移植前细胞移植组与模型组的体质量均低于正常组,移植后2周细胞移植组大鼠体质量逐渐增加,而模型组的体质量持续下降;②与正常组比较,模型组大鼠空腹血糖维持在较高水平(P < 0.05),与模型组相比,细胞移植组大鼠空腹血糖水平显著下降(P < 0.05);③与正常组比较,模型组胰岛素水平明显降低(P < 0.05),与模型组比较,细胞移植组胰岛素水平则显著增加(P < 0.05);④正常组胰腺组织PDX-1 mRNA表达最高,模型组最低,各组间比较差异有显著性意义(P < 0.05);⑤结果表明,脂肪间充质干细胞移植促进胰岛组织PDX-1表达,改善了大鼠的高血糖状态。

 

 

关键词: 干细胞, 移植, 脂肪间充质干细胞, 大鼠, 1型糖尿病, PDX-1, 血糖, 胰岛素

Abstract:

BACKGROUND: Stem cell transplantation is a promising treatment for type 1 diabetes mellitus. Adipose-derived mesenchymal stem cells have become another hotspot following bone marrow mesenchymal stem cells.
OBJECTIVE: To investigate the therapeutic effect of adipose-derived mesenchymal stem cell transplantation on type 1 diabetes in a rat model.
METHODS: Forty-five Sprague-Dawley rats were randomized into normal, model and cell transplantation. Animal model of type 1 diabetes was made in the latter two groups through intraperitoneal injection of streptozotocin. Seven days after modeling, rats in the three groups were given intraperitoneal injection of normal saline, serum-free DMEM or adipose-derived mesenchymal stem cell suspension, respectively. Two weeks after injection, body mass, blood glucose level, insulin secretion and PDX-1 mRNA in the pancreatic tissue of rats were monitored and detected in the three groups.
RESULTS AND CONCLUSION: After modeling, the body mass of rats were lowered, and increased gradually in the cell transplantation group at 2 weeks after cell transplantation, but it was still decreased in the model group. Compared with the normal group, the fasting blood glucose level was significantly higher in the model group (P < 0.05), but it was reduced significantly after cell transplantation (P < 0.05). Compared with the normal group, the insulin level was reduced significantly in the model group (P < 0.05), but it was increased significantly after cell transplantation (P < 0.05). Highest and lowest PDX-1 mRNA expressions were obtained in the normal and model groups, respectively; and there was a significant difference between groups (P < 0.05). All these findings show that adipose-derived mesenchymal stem cell transplantation relieves hyperglycemia in rats by promoting the expression of PDX-1 in the rat pancreatic tissue.

 

 

Key words: Adipose Tissue, Mesenchymal Stem Cell Transplantation, Diabetes Mellitus, Type 1, Tissue Engineering

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