Project description:Ngn3 is a master regulator of pancreatic endocrine development. It is necessary for the creation of all endocrine cells in mice. Little is known about the genes that act downstream of the transcription factor Ngn3 in pancreas endocrine development to specify each of the endocrine lineages. As a consequence, little is known about the genes involved in early development and the specification of the beta cell. We used microarrays to identify Ngn3 downstream genes that are involved in early and ectopic beta cell development in Xenopus laevis. We overexpressed Ngn3 in the Xenopus early endoderm and analyzed the genes that are upregulated four hours after. Xenopus laevis embryos were injected with Ngn3-GR mRNA at the eight-cell stage in the two dorsal vegetal blastomeres. Embryos at stage 12 were either treated with dexamethasone (+DEX) for four hours or no DEX (-DEX). The endoderm was dissected at stage 15. We looked for genes upregulated in the +DEX samples compared to the -DEX samples.
Project description:Ngn3 is a master regulator of pancreatic endocrine development. It is necessary for the creation of all endocrine cells in mice. Little is known about the genes that act downstream of the transcription factor Ngn3 in pancreas endocrine development to specify each of the endocrine lineages. As a consequence, little is known about the genes involved in early development and the specification of the beta cell. We used microarrays to identify Ngn3 downstream genes that are involved in early and ectopic beta cell development in Xenopus laevis. We overexpressed Ngn3 in the Xenopus early endoderm and analyzed the genes that are upregulated four hours after.
Project description:Analysis of whole body of unfertilized eggs and two-cell stage, 16-cell stage, stage 8, stage 9, stage 10.5, stage 12, stage 15, stage 20, stage 25, stage 30, stage 35 and stage 40 embryos. Results provide insight into the global molecular changes in Xenopus embryogenesis.
Project description:Tissues from the eye primordia, lateral endoderm, and posterior; neural plate of stage 15 Xenopus laevis embryos were isolated and normalized to stage 15 whole embryos. Three biological replicates were prepared for each tissue and the expression patterns were profiled using Affymetrix Xenopus Laevis GeneChip microarrays. Experiment Overall Design: Tissues from the eye primordia, lateral endoderm, and posterior Experiment Overall Design: neural plate of stage 15 Xenopus laevis embryos were isolated and normalized to stage 15 whole embryos. Three biological replicates were prepared for each tissue and the expression patterns were profiled using Affymetrix Xenopus Laevis GeneChip microarrays.
