Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Effects of dexamethasone on cultured lung explant

ABSTRACT: The lung is a branched tubular network with two distinct compartments — the proximal conducting airways and the peripheral gas exchange region — separated by a discrete boundary termed the bronchoalveolar duct junction (BADJ). Here we image the developing mouse lung in three-dimensions and show that two nested developmental waves demarcate the BADJ under the control of a global hormonal signal. A first wave of branching morphogenesis progresses throughout embryonic development, generating branches for both compartments. A second wave of conducting airway differentiation follows the first wave but terminates earlier, specifying the proximal compartment and setting the BADJ. The second wave is terminated by a glucocorticoid signaling: premature activation or loss of glucocorticoid signaling causes a proximal or distal shift, respectively, in BADJ location. The results demonstrate a novel mechanism of boundary formation in complex, three-dimensional organs and provide new insights into glucocorticoid therapies for lung defects in premature birth.

ORGANISM(S): Mus musculus

PROVIDER: GSE56831 | GEO | 2014/05/22

SECONDARY ACCESSION(S): PRJNA244730

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Effects of dexamethasone on cultured lung explant

Project description:The lung is a branched tubular network with two distinct compartments — the proximal conducting airways and the peripheral gas exchange region — separated by a discrete boundary termed the bronchoalveolar duct junction (BADJ). Here we image the developing mouse lung in three-dimensions and show that two nested developmental waves demarcate the BADJ under the control of a global hormonal signal. A first wave of branching morphogenesis progresses throughout embryonic development, generating branches for both compartments. A second wave of conducting airway differentiation follows the first wave but terminates earlier, specifying the proximal compartment and setting the BADJ. The second wave is terminated by a glucocorticoid signaling: premature activation or loss of glucocorticoid signaling causes a proximal or distal shift, respectively, in BADJ location. The results demonstrate a novel mechanism of boundary formation in complex, three-dimensional organs and provide new insights into glucocorticoid therapies for lung defects in premature birth. RNAs were extracted from E14 lungs cultured in control and dexamethasone media for 24 hours using Trizol reagents and Qiagen RNeasy Micro kit. Two control and two treated samples were analyzed.

2014-05-22 | E-GEOD-56831 | biostudies-arrayexpress

Semen proteome analysis comparing the persistent effects of different SARS-COV-2 variants on male reproductive system in recovered men

Project description:After the initial COVID-19 wave, India experienced a second COVID-19 wave in March 2021, which was driven by the delta variant. By January 2021, India has also begun its vaccine campaign. Therefore, semen samples from recovered patients who were infected during the two waves of COVID-19 in India were obtained to study the impact of variants on the male reproductive system. We compared samples from the second wave with those of first wave in India. We also included control samples to the comparison.

2024-01-26 | PXD041904 | Pride

mTORC1 signaling facilitates differential stem cell differentiation to shape the developing murine lung and is associated with mitochondrial capacity

Project description:Formation of branched organs requires sequential differentiation of stem cells. In this work, we find that the conducting airways derived from SOX2+ progenitors in the murine lungs fail to form without mTOR complex 1 (mTORC1) signaling and are replaced by lung cysts. Proximal-distal patterning through transitioning of distal SOX9+ progenitors to the proximal SOX2+ cells is disrupted. Mitochondria number and ATP production are reduced. Compromised mitochondrial capacity results in a similar defect as that in mTORC1-deficient lungs. This suggests that mTORC1 promotes differentiation of SOX9+ progenitors to form the conducting airways by modulating mitochondrial capacity. Surprisingly, in all mutants saccules are produced from lung cysts at the proper developmental time despite defective branching. SOX9+ progenitors also differentiate into alveolar epithelial type I and type II cells within saccules. These findings highlight selective utilization of energy and regulatory programs during stem cell differentiation to produce distinct structures of the mammalian lungs.

2022-11-03 | GSE189327 | GEO

mTORC1 signaling facilitates differential stem cell differentiation to shape the developing murine lung and is associated with mitochondrial capacity

2022-11-03 | GSE213202 | GEO

DNMT1 is required for proximal-distal patterning of the lung endoderm and restraining alveolar type 2 cell fate

Project description:Lung endoderm development occurs through a series of finely coordinated transcriptional processes that are regulated by epigenetic mechanisms. However, the role of DNA methylation in regulating lung endoderm development remains poorly understood. We demonstrate that DNA methyltransferase 1 (Dnmt1) is required for early branching morphogenesis of the lungs and for restraining epithelial fate specification. Loss of Dnmt1 leads to an early branching defect, a loss of proximal endodermal cell differentiation, and an expansion of the distal endoderm compartment. Dnmt1 deficiency also leads to precocious distal endodermal cell differentiation with premature expression of alveolar type 2 cell restricted genes. These data reveal an important requirement for Dnmt1 mediated DNA methylation in early lung development to promote proper branching morphogenesis, maintain proximal endodermal cell fate, and suppress premature activation of the distal epithelial fate.

2020-01-24 | GSE129177 | GEO

Defining a molecular roadmap of cellular reprogramming into iPS Cells [DNA methylation]

Project description:Factor-induced reprogramming of somatic cells into induced pluripotent stem cells (iPSCs) is inefficient, complicating mechanistic studies. Here, we examined defined intermediate cell populations poised to becoming iPSCs by genome-wide analyses. We show that induced pluripotency elicits two transcriptional waves, which are driven by c-Myc/Klf4 (first wave) and Oct4/Sox2/Klf4 (second wave). Cells that become refractory to reprogramming activate the first but fail to initiate the second transcriptional wave and can be rescued by elevated expression of all four factors. The establishment of bivalent domains occurs gradually after the first wave, whereas changes in DNA methylation take place after the second wave when cells acquire stable pluripotency. This integrative analysis allowed us to identify genes that act as roadblocks during reprogramming and surface markers that further enrich for cells prone to forming iPSCs. Collectively, our data offer new mechanistic insights into the nature and sequence of molecular events inherent to cellular reprogramming.

2013-03-18 | GSE45248 | GEO

Malinzi2018 - tumour-immune interaction model

Project description:The paper describes a spatio-temporal mathematical model, in the form of a moving boundary problem, to explain cancer dormancy is developed. Created by COPASI 4.24 (Build 197) Abstract: A spatio-temporal mathematical model, in the form of a moving boundary problem, to explain cancer dormancy is developed. Analysis of the model is carried out for both temporal and spatio-temporal cases. Stability analysis and numerical simulations of the temporal model replicate experimental observations of immune-induced tumour dormancy. Travelling wave solutions of the spatio-temporal model are determined using the hyperbolic tangent method and minimum wave speeds of invasion are calculated. Travelling wave analysis depicts that cell invasion dynamics are mainly driven by their motion and growth rates. A stability analysis of the spatio-temporal model shows a possibility of dynamical stabilization of the tumour-free steady state. Simulation results reveal that the tumour swells to a dormant level.

2024-09-02 | BIOMD0000000809 | BioModels

Gene Expression in Human Lung Type II Cells

Project description:Normal lung function relies on mature function of alveolar type II cels, which have numerous functions including to regulate ion and fluid flux, produce immune molecules, and synthesize and secrete surfactant to stabilize air spaces. Differentiation of type II cells from precursor epithelial cells is accelerated by exposure of cultured cells to glucocorticoid and cAMP. In these studies we used DNA microarray analysis to identify genes of both fetal and adult type II cells that are regulated by glucocorticoid plus cAMP. In the first series of experiments we isolated epithelial cells from fetal human lung and cultured cells for 5 days with or without hormone treatment (dexamethasone plus 8-Br-cAMP plus isobutylmethylxanthine, DCI) and then performed DNA microarray analysis. In the second series of experiments, we isolated type II cells from adult human postmortem lung and cultured cells for 5 days with or without DCI and performed DNA microarray analysis.

2009-12-30 | E-GEOD-19699 | biostudies-arrayexpress

Defining a molecular roadmap of cellular reprogramming into iPS Cells [DNA methylation]

2013-03-18 | E-GEOD-45248 | biostudies-arrayexpress

Structural organization of the inactive X chromosome

Project description:X-chromosome inactivation (XCI) entails a massive structural reorganization of the inactive X (Xi). However the molecular architecture of the Xi is unknown. Here we show that the Xi lacks typical autosomal features such as active/inactive compartments and topologically associating domains (TADs), except around a small number of genes that escape XCI and remain expressed. Escaping genes form TADs and retain DNA accessibility at promoter-proximal and CTCF binding sites, indicating that these loci can avoid Xist-mediated erasure of chromosomal structure. We further show that genesilencing competent Xist RNA is sufficient to induce segregation of the Xi into two ‘mega-domains’ separated by a boundary that includes the DXZ4 macrosatellite. Deletion of this boundary prior to XCI results in fusion of the megadomains and altered patterns of escape that correlate with changes in TAD structure following differentiation and XCI . Our results suggest a critical role for the boundary locus and Xist RNA in shaping the structure of the Xi and modulating escape from XCI. Our findings also point to roles of transcription and CTCF binding in TAD formation in the context of facultative heterochromatin.

2016-07-18 | GSE72697 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data