Synergistic Effect of Hyperglycemia and p27(kip1) Suppression on Adult Mouse Islet Beta Cell Replication.

Abstract:

:The complementary role of hyperglycemia and p27(kip1) suppression on islet beta cell regeneration was investigated in a syngeneic mouse model. p27(kip1) gene silencing was performed by infecting islets of C57BL/6 with shRNA lentiviral particles. At 54 hours after viral infection, p27(kip1) protein content in cultured targeting islets was 22% of that in freshly isolated islets. Six days after transplantation to diabetic mice, targeting islet graft had considerably more cells with Ki67-staining nuclei than nontargeting islets. The mice in the targeting-islet group had a significantly shorter duration of temporary hyperglycaemia than mice in the non-targeting-islet group. The long-term ex vivo beneficial effect of p27(kip1) silencing on graft function was also indicated by the significantly higher cumulative cure rate for diabetes in mice receiving 200 targeting islets than that in mice receiving 200 non-targeting islets. Our data suggest that hyperglycemia and persistent p27(kip1) suppression have a synergistic effect on islet beta cell replication in adult mice.

journal_name

Int J Endocrinol

authors

Chen ST,Fu SH,Hsu S,Huang YY,Hsu BR

doi

10.1155/2012/417390

subject

Has Abstract

pub_date

2012-01-01 00:00:00

pages

417390

eissn

1687-8337

issn

1687-8345

journal_volume

2012

pub_type

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