A secretory function of human insulin-producing cells in vivo.
Hepatobiliary Pancreat Dis Int
; 8(3): 255-60, 2009 Jun.
Article
em En
| MEDLINE
| ID: mdl-19502164
ABSTRACT
BACKGROUND:
Mesenchymal stem cells derived from human umbilical cord blood (UCB-MSCs) have good research and application prospects in the treatment of diabetes. We once induced UCB-MSCs to differentiate into insulin-producing cells (IPCs) in vitro, but we did not know the functions of these cells in vivo. The aim of this study was to assess the functional effects of IPCs on insulin secretion and their role in the treatment of diabetes in vivo.METHODS:
UCB-MSCs were induced to IPCs by an inducing protocol with extracellular matrix gel. BALB/C nude mice were made hyperglycemic by intraperitoneal injection of streptozotocin. The diabetic mice were transplanted with 1X10(7) IPCs under the renal capsule or with phosphate-buffered saline as a control. After transplantation, the grafts were analyzed by immunocytochemistry for the expression of human insulin; the serum human insulin levels were measured; and blood glucose and body weight status were monitored.RESULTS:
Immunofluorescence showed that numerous IPCs under the kidney capsule were insulin-positive. On day 14 after transplantation, the serum human insulin level of the treatment group (n=9) averaged 0.44+/-0.12 mU/L, which was higher than that of the control group (n=9) that did not express insulin (t=10.842, P<0.05). The diabetic mice remained hyperglycemic and kept losing body weight after IPC transplantation, and there was no significant difference in the control group.CONCLUSION:
IPCs differentiated from UCB-MSCs generate human insulin in diabetic mice, but more research is needed to make further use of them to regulate hyperglycemia and body weight in vivo.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Diabetes Mellitus Experimental
/
Células Secretoras de Insulina
/
Insulina
Tipo de estudo:
Guideline
Limite:
Animals
/
Humans
/
Male
Idioma:
En
Revista:
Hepatobiliary Pancreat Dis Int
Assunto da revista:
GASTROENTEROLOGIA
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
China