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An amylase/Cre transgene marks the whole endoderm but the primordia of liver and ventral pancreas

Hagenbuchle, Otto
Wellauer, P. K.
Published in Genesis. 2006, vol. 44, no. 6, p. 287-296
Abstract Mice bearing a Cre-encoding transgene driven by a compound [SV40 small t antigen/mousealpha-amylase-2] promoter expressed the recombinase at early developmental stages broadly in the embryonic endoderm before the pancreas and lungs begin to outgrow, but not in other germ layers, as determined indirectly by beta-galactosidase and YFP reporter activity, indicating that the transgene is in fact an endodermic marker. Interestingly, the liver and ventral pancreas were excluded from this expression pattern, denoting that the chimerical alpha-amylase-2 promoter was not active in the anterior leading edge of the endoderm (the presumptive region from which liver and ventral pancreas form). These transgenics thus confirm, among other findings, that dorsal and ventral pancreatic primordia have different intrinsic transcriptional capabilities. In conclusion, we have generated a new transgenic mouse that should be useful to target endoderm at early stages, without affecting the liver or ventral pancreas before embryonic day E12.5.
Keywords AnimalsAntigens, Polyomavirus Transforming/geneticsCell LineageEndocrine System/embryology/metabolismEndoderm/ metabolismGene ExpressionHomeodomain Proteins/geneticsHumansIntegrases/ geneticsLiver/ embryology/metabolismLymph Nodes/metabolismMiceMice, Transgenic/ embryologyModels, GeneticPancreas/ embryology/metabolismSalivary Glands/metabolismStem Cells/metabolismTranscription Factors/geneticsTransgenesAlpha-Amylases/ genetics
PMID: 16786601
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Research group Types cellulaires pancréatiques pendant l'ontogénèse (522)
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KOCKEL, Liliana et al. An amylase/Cre transgene marks the whole endoderm but the primordia of liver and ventral pancreas. In: Genesis, 2006, vol. 44, n° 6, p. 287-296. doi: 10.1002/dvg.20206 https://archive-ouverte.unige.ch/unige:8836

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Deposited on : 2010-07-12

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