Neurogenin3 activation is not sufficient to direct duct-to-beta cell transdifferentiation in the adult pancreas.
J Biol Chem
; 288(35): 25297-25308, 2013 Aug 30.
Article
en En
| MEDLINE
| ID: mdl-23867457
ABSTRACT
It remains controversial whether adult pancreatic ducts harbor facultative beta cell progenitors. Because neurogenin3 (Ngn3) is a key determinant of pancreatic endocrine cell neogenesis during embryogenesis, many studies have also relied upon Ngn3 expression as evidence of beta cell neogenesis in adults. Recently, however, Ngn3 as a marker of adult beta cell neogenesis has been called into question by reports of Ngn3 expression in fully-developed beta cells. Nevertheless, direct evidence as to whether Ngn3 activation in adult pancreatic duct cells may lead to duct-to-beta cell transdifferentiation is lacking. Here we studied two models of Ngn3 activation in adult pancreatic duct cells (low-dose alloxan treatment and pancreatic duct ligation) and lineage-traced Ngn3-activated duct cells by labeling them through intraductal infusion with a cell-tagging dye, CFDA-SE No dye-labeled beta cells were found during the follow-up in either model, suggesting that activation of Ngn3 in duct cells is not sufficient to direct their transdifferentiation into beta cells. Therefore, Ngn3 activation in duct cells is not a signature for adult beta cell neogenesis.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Conductos Pancreáticos
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Células Secretoras de Insulina
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Factores de Transcripción con Motivo Hélice-Asa-Hélice Básico
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Transdiferenciación Celular
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Proteínas del Tejido Nervioso
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
J Biol Chem
Año:
2013
Tipo del documento:
Article