Chinese Journal of Tissue Engineering Research ›› 2015, Vol. 19 ›› Issue (36): 5833-5837.doi: 10.3969/j.issn.2095-4344.2015.36.017

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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

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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