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http://dx.doi.org/10.5483/BMBRep.2012.45.1.51

Glucocorticoid treatment independently affects expansion and transdifferentiation of porcine neonatal pancreas cell clusters  

Kim, Ji-Won (Department of Endocrinology and Metabolism, The Catholic University of Korea)
Sun, Cheng-Lin (Department of Endocrinology and Metabolism, The Catholic University of Korea)
Jeon, Sung-Yoon (Department of Endocrinology and Metabolism, The Catholic University of Korea)
You, Young-Hye (Department of Endocrinology and Metabolism, The Catholic University of Korea)
Shin, Ju-Young (Department of Endocrinology and Metabolism, The Catholic University of Korea)
Lee, Seung-Hwan (Department of Endocrinology and Metabolism, The Catholic University of Korea)
Cho, Jae-Hyoung (Department of Endocrinology and Metabolism, The Catholic University of Korea)
Park, Chung-Gyu (Department of Microbiology, Xenotransplantation Research Center, Cancer Research Institute, Seoul National University)
Yoon, Kun-Ho (Department of Endocrinology and Metabolism, The Catholic University of Korea)
Publication Information
BMB Reports / v.45, no.1, 2012 , pp. 51-56 More about this Journal
Abstract
The purpose of this study was to determine the effects of duration and timing of glucocorticoid treatment on the expansion and differentiation of porcine neonatal pancreas cell clusters (NPCCs) into ${\beta}$-cells. After transplantation of NPCCs, the ductal cyst area and ${\beta}$-cell mass in the grafts both showed positive and negative correlations with duration of dexamethasone (Dx) treatment. Pdx-1 and HNF-3${\beta}$ gene expression was significantly downregulated following Dx treatment, whereas PGC-1${\alpha}$ expression increased. Pancreatic duct cell apoptosis significantly increased following Dx treatment, whereas proliferation did not change. Altogether, transdifferentiation of porcine NPCCs into ${\beta}$-cells was influenced by the duration of Dx treatment, which might have been due to the suppression of key pancreatic transcription factors. PGC-1${\alpha}$ plays an important role in the expansion and transdifferentiation of porcine NPCCs, and the initial 2 weeks following transplantation of porcine NPCCs is a critical period in determining the final ${\beta}$-cell mass in grafts.
Keywords
Dexamethasone (Dx); Diabetes mellitus; Neonatal porcine pancreas cell clusters (NPCCs); Pancreatic ${\beta}$-cells; Transdifferentiation;
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