Gene expression array of brain, mandible and maxilla tissues from P0 FoxO6-/- and wildtype mice
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ABSTRACT:
PROVIDER: PRJNA480854 | ENA |
REPOSITORIES: ENA
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Project description:FoxO6 is expressed in the brain, craniofacial region and somite, but the precise role of FoxO6 in craniofacial development remain unknown. We found that FoxO6 is expressed specifically in craniofacial tissues and FoxO6-/- mice undergo expansion of the face, frontal cortex, olfactory component and skull. Our gene expression array data demonstrated that Lats1, an important component of Hippo signaling pathway, was decresed in FoxO6-/- mice. Our in vitro and in vivo data further validated that FoxO6 activates Lats1 expression, thereby increasing Yap phosphorylation and activation of Hippo signaling.
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Project description:This study determines pineal gland gene expression levels in the NeuroD1 knockout mouse at postnatal day zero. Comparison was performed against pineal gland gene expression levels in 129 wildtype mice also disected at P0. Experiment Overall Design: Wildype 129 mice served as the reference in comparing the levels of gene expression in the NeuroD1 transgenic animals. Experiment Overall Design: 3 pineal glands were disected at P0 during the daytime and pooled for each sample. Experiment Overall Design: 3 separate biological samplings were performed. Experiment Overall Design: Triplicate arrays were run for wildtype and the homozygous animals.
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Project description:Previous analysis of Myf5-/-:MyoD-/- mouse fetuses lacking skeletal muscle demonstrated the importance of muscle contraction and static loading in mouse skeletogenesis. Previous analysis of Myf5-/-:MyoD-/- mouse fetuses lacking skeletal muscle demonstrated the importance of muscle contraction and static loading in mouse skeletogenesis. Among abnormal skeletal features, micrognathia (mandibular hypoplasia) was detected: small, bent and posteriorly displaced mandible. As an example of Waddingtonian epigenetics, we suggest that muscle, in addition to acting via mechanochemical signal transduction pathways, networks and promoters, also exerts secretory stimuli on skeleton. Our goal is to identify candidate molecules at that muscle-mandible interface. By employing Systematic Subtractive Microarray Analysis approach, we compared gene expression between mandibles of amyogenic and wild type mouse fetuses. We identified a set of candidate genes with involvement in mandibulardevelopment: Cacna1s, Ckm, Des, Mir300, Myog and Tnnc1. We also performed mouse-to-human translational experiments and found analogies. In the light of our findings we discuss various players in mandibular morphogenesis and make an argument for the need to consider mandibular development as a consequence of reciprocal epigenetic interactions of both skeletal and non-skeletal compartments.
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Project description:The mandible of the jawed vertebrate is derived from the mandibular process of the first pharyngeal arch of the early embryo. The first pharyngeal arch consists of cells from all three germ layers, with the neural crest giving rise to all the skeletal elements of the mandible. The correct patterning of the neural crest cells by spatially and temporally controlled expression of various transcription factors during mandible development is crucial for the proper morphogenesis of the lower jaw. Msx family genes encode transcription factors which contain the conserved homeodomain. Among the three members of Msx genes, Msx1 and Msx2 are expressed in the neural crest and epithelium of distal mandibular process during early embryonic development with partially overlapped expression patterns. Msx1-/- mouse embryos develop multiple craniofacial developmental defects including tooth agenesis, cleft palate, and hypoplastic mandible. Although no jaw defects were observed in Msx2-/- mouse embryos, Msx1-/-Msx2-/- mouse embryos exhibit significantly severer mandibular defects compared to Msx1-/- mouse embryos, suggesting a partial functional redundancy between the two genes in mandible development. Besides the direct roles of Msx1 and Msx2 in the development of the mandibular neural crest, the phenotypes of Msx1-/-Msx2-/- may also contributed by secondary impacts from defective pre-migrative neural crest and non-neural crest tissues. Here we performed the gene expression profiling by RNA-seq in the distal mandibular processes of Msx1f/f;Msx2f/f;Hand2-Cre and Msx1f/+;Msx2f/f;Hand2-Cre embryos at E10.75, the former developed distally truncated mandible at later stages while the latter served as morphologically normal littermate control. Comparing the gene expression profiles of the two will give us insight into the functions of Msx1 and Msx2 expressed in mandibular neural crest cells in the development of the mandible.
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Project description:The mandible plays an essential part in human life and, thus, defects in this structure can dramatically impair the quality of life in patients. Axolotls, unlike humans, are capable of regenerating their lower jaws; however, the underlying mechanisms and their similarity to those in limb regeneration are unknown. In this work, we used morphological, histological, and transcriptomic approaches to analyze the regeneration of lateral resection defects in the axolotl mandible. We found that this structure can regenerate all missing tissues in 90 days through gap minimization, blastema formation, and finally tissue growth, differentiation, and integration. Moreover, transcriptomic comparisons of regenerating mandibles and limbs showed that they share molecular phases of regeneration, that these similarities peak during blastema stages, and that mandible regeneration occurs at a slower pacing. Altogether, our study demonstrates the existence of a shared regenerative program used in two different regenerating body structures with different embryonic origins in the axolotl, and contributes to our understanding of the minimum requirements for a successful regeneration in vertebrates, bringing us closer to understand similar lesions in human mandibles.
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