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Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

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Expression data from Hand2 mutant mouse embryos

ABSTRACT: Acquisition of the lower jaw (mandible) was evolutionarily important for jawed vertebrates. In humans, syndromic craniofacial malformations often accompany jaw anomalies. Hand2 is involved in coordinating the developmental network of mandibles and the oral apparatus through Hand2-downstream genes and is therefore a major determinant of jaw identity. We used microarrays to detail the global programme of gene expression involved in mandible specification and identified distinct classes of up-regulated genes during this process. Wild-type and Hand2 mutant (Hand2 CAT/+; Wnt1-Cre) embryos were collected at Embryonic day (E) 11.5 or E12.5 for RNA extraction and hybridization on Affymetrix microarrays.

ORGANISM(S): Mus musculus

SUBMITTER: Noriko Funato

PROVIDER: E-GEOD-75805 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Expression data from Hand2 mutant mouse embryos

Project description:Acquisition of the lower jaw (mandible) was evolutionarily important for jawed vertebrates. In humans, syndromic craniofacial malformations often accompany jaw anomalies. Hand2 is involved in coordinating the developmental network of mandibles and the oral apparatus through Hand2-downstream genes and is therefore a major determinant of jaw identity. We used microarrays to detail the global programme of gene expression involved in mandible specification and identified distinct classes of up-regulated genes during this process.

2015-12-15 | GSE75805 | GEO

RNAseq comparison of gene expression profiles in Hand2-Cre driven Msx1/Msx2 double conditional mutant and control mouse embryonic mandible

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.

2024-01-10 | GSE222566 | GEO

Transcription profile of zebrafish hand2 (hanS6 allele) mutant embryos at 19hpf

Project description:Heart formation requires the fusion of bilateral cardiomyocyte populations as they move toward the embryonic midline. The bHLH transcription factor Hand2 is essential for cardiac fusion; however, the effector genes that execute this function of Hand2 are unknown. Here, we provide the first evidence for a downstream component of the Hand2 pathway that mediates cardiac morphogenesis. Although hand2 is expressed in cardiomyocytes, mosaic analysis demonstrates that hand2 plays a non-autonomous role in regulating cardiomyocyte movement. Gene expression profiles reveal heightened expression of fibronectin 1 (fn1) in hand2 mutant embryos. Reciprocally, overexpression of hand2 leads to decreased Fibronectin levels. Furthermore, reduction of fn1 function enables rescue of cardiac fusion in hand2 mutants: bilateral cardiomyocyte populations merge and exhibit improved tissue architecture, albeit without major changes in apicobasal polarity. Together, our data provide a novel example of a tissue creating a favorable environment for its morphogenesis: the Hand2 pathway establishes an appropriate environment for cardiac fusion through negative modulation of Fn1 levels. Embryos from three independent hand2 mutant (hanS6 allele) heterozyogous crosses were collected. Examination of Tg(myl7:egfp) expression allow sorting of hand2 mutant embryos from their wild-type siblings.

2010-08-03 | E-GEOD-23381 | biostudies-arrayexpress

RNA-seq of murine macrophages (J774A.1 and Raw264.7) grown for 48 hours in conditioned media collected from primary murine Triple Negative Breast Cancer cells

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Hand2 delineates mesothelium progenitors and is reactivated in mesothelioma

Project description:The mesothelium forms epithelial membranes that line the bodies cavities and surround the internal organs. Mesothelia widely contribute to organ homeostasis and regeneration, and their dysregulation can result in congenital anomalies of the viscera, ventral wall defects, and mesothelioma tumors. Nonetheless, the embryonic ontogeny and developmental regulation of mesothelium formation has remained uncharted. Here, we combine genetic lineage tracing, in toto live imaging, and single-cell transcriptomics in zebrafish to track mesothelial progenitor origins from the lateral plate mesoderm (LPM). Our single-cell analysis uncovers a post-gastrulation gene expression signature centered on hand2 that delineates distinct progenitor populations within the forming LPM. Combining gene expression analysis and imaging of transgenic reporter zebrafish embryos, we chart the origin of mesothelial progenitors to the lateral-most, hand2-expressing LPM and confirm evolutionary conservation in mouse. Our time-lapse imaging of transgenic hand2 reporter embryos captures zebrafish mesothelium formation, documenting the coordinated cell movements that form pericardium and visceral and parietal peritoneum. We establish that the primordial germ cells migrate associated with the forming mesothelium as ventral migration boundary. Functionally, hand2 mutants fail to close the ventral mesothelium due to perturbed migration of mesothelium progenitors. Analyzing mouse and human mesothelioma tumors hypothesized to emerge from transformed mesothelium, we find de novo expression of LPM-associated transcription factors, and in particular of Hand2, indicating the re-initiation of a developmental transcriptional program in mesothelioma. Taken together, our work outlines a genetic and developmental signature of mesothelial origins centered around Hand2, contributing to our understanding of mesothelial pathologies and mesothelioma.

2022-01-14 | E-MTAB-9727 | biostudies-arrayexpress

Gene expression profiling of uterine stromal cells isolated from Hand2 floxed and Hand2 ablated mice on day 4 of pregnancy

Project description:Our previous study revealed that the basic helix-loop-helix transcription factor Hand2 is a downstream target of progesterone signaling in mouse uterine stroma at the time of implantation. Further, conditional deletion of Hand2 in mouse uterus leads to implantation failure due to impaired uterine epithelial receptivity. To identify the downstream targets of Hand2 in the uterus, we performed gene expression profling of uterine stromal cells isolated from Hand2-null mice and the corresponding controls on day4 of pregnancy (the time of implantation). The microarray results revealed elevated expression of mRNAs corresponding to several members of the fibroblast growth factor family in uterine stroma of Hand2-ablated mice. These factors act as paracrine mediators of mitogenic effects of estrogen on the epithleium. Thus, Hand2 is a critical regulator of the uteirne stromal-epithelial communication that directs proper steroid regulation conducive for establshment of pregnancy. We performed conditional ablation of Hand2 in the mouse uterus using the PRcre mouse model. As Hand2 expression is restricted to stromal comaprtment, we isolated uterine stromal cells from day4 pregnant mice (n=5 for each genotype), purified total RNA from these cells, pooled these samples and then hybridized to high density affymetrix microarrays. Control vs. KO.

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Gene profiling of Hand2 target genes and transcriptional regulation of Hand2 expression in the postnatal myocardium

Project description:In humans, cardiac hypertrophy is the principal risk factor for the development of overt heart failure and sudden cardiac death from lethal arrhythmias. Although aberrant reactivation of fetal² gene programs is intricately linked to maladaptive hypertrophy of postnatal cardiomyocytes, loss of cardiac function and heart failure, the transcription factors driving these gene programs remain ill defined. We report that the basic helix-loop-helix (bHLH) transcription factor dHAND/Hand2 is re-expressed in the mammalian postnatal myocardium in response to stress signaling. Interestingly, mutant mice overexpressing Hand2 in otherwise healthy ventricular myocytes developed a phenotype of pathological hypertrophy. In contrast, conditional gene-targeted Hand2 mice demonstrated a marked resistance to pressure overload-induced hypertrophy, fibrosis, ventricular dysfunction and induction of a fetal gene program. These data suggest a critical role for the Hand2 transcription factor during hypertrophic remodeling and heart failure. To gain more mechanistically insight in the processes underlying heart failure, we here identified Hand2 target genes by microarray gene expression profiling. RNA samples were collected 4 weeks after sham or TAC surgery (to induce pressure overload) of both tamoxifen-treated Hand2f/f (WT) and MCM-Hand2f/f (KO) mice.

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HAND2 regulates regional chromation modification [HAND2-knockdown_histone_ChIPseq]

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Specific functions for ERK/MAPK signaling during PNS development

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