中国组织工程研究 ›› 2015, Vol. 19 ›› Issue (36): 5833-5837.doi: 10.3969/j.issn.2095-4344.2015.36.017

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

脐血干细胞对1型糖尿病大鼠血糖及PDX-1、MafA表达水平的影响

杜俊文,吴  韬,张  坤,苏白玉,卢彩萍,王伟超,雷  琳,郭静霞   

  1. 石家庄市第一医院,河北省石家庄市  050000
  • 出版日期:2015-09-03 发布日期:2015-09-03
  • 作者简介:杜俊文,女,1976年生,河北省石家庄市人,汉族,硕士,副主任医师,主要从事内分泌及代谢方面的研究。

Effect of umbilical cord blood stem cells on blood glucose levels and PDX-1 and MafA levels in type 1 diabetic rats

Du Jun-wen, Wu Tao, Zhang Kun, Su Bai-yu, Lu Cai-ping, Wang Wei-chao, Lei Lin, Guo Jing-xia   

  1. Shijiazhuang First Hospital, Shijiazhuang 050000, Hebei Province, China
  • Online:2015-09-03 Published:2015-09-03
  • About author:Du Jun-wen, Master, Associate chief physician, Shijiazhuang First Hospital, Shijiazhuang 050000, Hebei Province, China

摘要:

背景:1型糖尿病是一种自身免疫性疾病,以胰腺β细胞选择性破坏,导致患者体内胰岛素分泌绝对不足为特征。脐血干细胞具有多分化潜能,在体内外均可以诱导分化为胰岛细胞,发挥出一定的降糖作用。

目的:探讨脐血干细胞对1型糖尿病大鼠血糖水平及胰腺组织PDX-1、MafA表达的影响。

方法:30只SD大鼠随机分为3组,每组10只,治疗组和模型组大鼠建立1型糖尿病模型,造模成功后,治疗组尾静脉一次性注射脐血干细胞,正常组给予相同体积的生理盐水,模型组给予相同体积的脐血干细胞缓冲液。采用口服葡萄糖耐量试验评价大鼠胰岛功能,苏木精-伊红染色观察大鼠胰腺形态,Western blot 和PCR 检测胰腺组织PDX-1、MafA蛋白和mRNA表达。

结果与结论:①模型组和治疗组大鼠0,30,60,90 min的血糖值均显著高于正常组,差异均有显著性意义(P < 0.05);120 min时间点模型组血糖值显著高于正常组(P < 0.05);治疗组则与正常组之间差异无显著性意义(P > 0.05)。②模型组胰岛数量出现下降,边界模糊不清,呈不规则形态,治疗组胰岛数量出现一定的减少,但尚维持清晰的结构。③治疗组PDX-1及MafA表达水平与正常组比较差异无显著性意义(P > 0.05),但显著高于模型组(P < 0.05)。以上结果表明,脐血干细胞可以显著降低1型糖尿病大鼠的血糖水平,改善胰岛功能及胰腺组织形态,并具有上调PDX-1、MafA表达的作用。

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 干细胞, 移植, 脐血干细胞, 1型糖尿病, 血糖, PDX-1, MafA

Abstract:

BACKGROUND: Type 1 diabetes mellitus is an autoimmune disease, which is characterized as the selective destruction of pancreatic beta cells in the body, resulting in the lack of insulin secretion. Umbilical cord blood stem cells have the potential to differentiate into islet cells in vitro and in vivo, which play a certain hypoglycemic effect.

OBJECTIVE: To explore the effects of umbilical cord blood stem cells on blood glucose levels and PDX-1 and MafA levels in the pancreatic tissue of type 1 diabetic rats.

METHODS: Thirty Sprague-Dawley rats were randomly divided into three groups, with 10 rats in each group. In treatment and model groups, type 1 diabetes mellitus modes were established. After modeling, the treatment group was given a single tail vein injection of umbilical cord blood stem cells; the normal control group was given the same volume of normal saline; the model group was given the same volume of umbilical cord blood stem cell buffer solution. Oral glucose tolerance test was adopted to assess the islet function of rats; hematoxylin-eosin staining was used to observe the pancreatic morphology of rats; western blot and PCR methods were employed to detect expressions of PDX-1 and MafA in pancreatic tissues at protein and mRNA levels.

RESULTS AND CONCLUSION: (1) Compared with the normal control group, the levels of blood glucose in the model and treatment groups were significantly higher at 0, 30, 60, 90 minutes (P < 0.05). At 120 minutes, the blood glucose level in the model group was significantly higher than that in the normal control group (P < 0.05), but there was no difference between the treatment and normal control groups (P > 0.05). (2) The number of islets in the model group was decreased, and the boundary was unclear and irregular; in the treatment group, the number of islets was decreased, but the boundary was still clear.(3) The expressions of PDX-1 and MafA in the treatment group were similar to those in the normal control group (P > 0.05), but significantly higher than those in the model group (P < 0.05). These findings suggest that the umbilical cord blood stem cell transplantation can significantly reduce the blood glucose levels in type 1 diabetic rats, improve the function of islet and morphology of pancreas, and up-reuglate the expressions of PDX-1 and MafA.

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

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