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Bone marrow mesenchymal stem cells promote the repair of islets from diabetic mice through paracrine actions
被引:52
|作者:
Gao, Xiaodong
[1
,2
]
Song, Lujun
[1
,2
]
Shen, Kuntang
[1
,2
]
Wang, Hongshan
[1
,2
]
Qian, Mengjia
[3
]
Niu, Weixin
[1
]
Qin, Xinyu
[1
,2
]
机构:
[1] Fudan Univ, Shanghai Med Coll, Zhongshan Hosp, Dept Gen Surg, Shanghai 200433, Peoples R China
[2] Fudan Univ, Inst Gen Surg, Shanghai 200433, Peoples R China
[3] Fudan Univ, Expt Res Ctr, Zhongshan Hosp, Shanghai Med Coll, Shanghai 200433, Peoples R China
基金:
高等学校博士学科点专项科研基金;
关键词:
Regeneration;
Diabetes;
Cell therapy;
Paracrine signaling;
GLUCAGON-LIKE PEPTIDE-1;
PANCREATIC BETA-CELLS;
STROMAL CELLS;
IN-VITRO;
TRANSPLANTATION;
REGENERATION;
PROGENITORS;
ENDOCRINE;
DIFFERENTIATION;
PROLIFERATION;
D O I:
10.1016/j.mce.2014.03.004
中图分类号:
Q2 [细胞生物学];
学科分类号:
071009 ;
090102 ;
摘要:
Transplantation of bone marrow mesenchymal stem cells (MSCs) has been shown to effectively lower blood glucose levels in diabetic individuals, but the mechanism has not been adequately explained. We hypothesized that MSCs exert beneficial paracrine actions on the injured islets by releasing biologically active factors. To prove our hypothesis, we tested the cytoprotective effect of conditioned medium from cultured MSCs on isolated islets exposed to STZ in vitro and on mice islets after the experimental induction of diabetes in vivo. We assessed islet regeneration in the presence of conditioned medium and explored the possible mechanisms involved. Transplantation of MSCs can ameliorate hyperglycemia in diabetic mice by promoting the regeneration of 13 cells. Both p cell replication and islet progenitors differentiation contribute to 3 cell regeneration. MSC transplantation resulted in increases in pAkt and pErk expression by islets in vivo. Treatment with MSC-CM promoted islet cell proliferation and resulted in increases in pAkt and pErk expression by islets in vitro. The -MSC-CM-mediated induction of (3 cell proliferation was completely blocked by the PI3K/Akt inhibitor LY294002 but not by the MEK/Erk inhibitor PD98059. Together, these data suggest that the PI3K/Akt signal pathway plays a critical role in beta cell proliferation after MSC transplantation. (c) 2014 Elsevier Ireland Ltd. All rights reserved.
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页码:41 / 50
页数:10
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