Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Combinatorial miRNA activity is essential for transition of pluripotent cells into dormancy [ivv_sRNA]

ABSTRACT: Dormancy is a key feature of stem cell function in adult tissues as well as embryonic cells in the context of diapause. The establishment of dormancy is an active process that involves extensive transcriptional, epigenetic, and metabolic rewiring. How these processes are coordinated to successfully transition cells to the resting dormant state is not known. Here we show that microRNA activity, which is normally dispensable for pre-implantation development, is essential for the adaptation of early mouse embryos to the dormant state of diapause. In particular, the pluripotent epiblast depends on miRNA activity, the absence of which results in loss of pluripotency and embryo collapse. Through small RNA profiling of individual embryos and computational integration of miRNA targets, we identified the miRNA-protein network of diapause. Individual miRNA function contributes to combinatorial regulation by the network and the perturbation of the network reduces embryo survival. Without miRNAs, nuclear and cytoplasmic bodies show aberrant expression. We identified the nutrient-sensitive transcription factor TFE3 as an upstream regulator of miRNA biogenesis, linking mTOR activity to miRNA induction. Our results reveal that miRNAs are critical for the transcriptional and structural rewiring of early embryos to establish dormancy.

ORGANISM(S): Mus musculus

PROVIDER: GSE245224 | GEO | 2024/03/26

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Combinatorial miRNA activity is essential for transition of pluripotent cells into dormancy [dgcr8_RNA]

Project description:Dormancy is a key feature of stem cell function in adult tissues as well as embryonic cells in the context of diapause. The establishment of dormancy is an active process that involves extensive transcriptional, epigenetic, and metabolic rewiring. How these processes are coordinated to successfully transition cells to the resting dormant state is not known. Here we show that microRNA activity, which is normally dispensable for pre-implantation development, is essential for the adaptation of early mouse embryos to the dormant state of diapause. In particular, the pluripotent epiblast depends on miRNA activity, the absence of which results in loss of pluripotency and embryo collapse. Through small RNA profiling of individual embryos and computational integration of miRNA targets, we identified the miRNA-protein network of diapause. Individual miRNA function contributes to combinatorial regulation by the network and the perturbation of the network reduces embryo survival. Without miRNAs, nuclear and cytoplasmic bodies show aberrant expression. We identified the nutrient-sensitive transcription factor TFE3 as an upstream regulator of miRNA biogenesis, linking mTOR activity to miRNA induction. Our results reveal that miRNAs are critical for the transcriptional and structural rewiring of early embryos to establish dormancy.

2024-03-26 | GSE244879 | GEO

Combinatorial miRNA activity is essential for transition of pluripotent cells into dormancy [ivt_sRNA]

2024-03-26 | GSE245225 | GEO

Coordinated miRNA activity mediates the cellular transition into dormancy during embryonic diapause

Project description:Dormancy is a key feature of stem cell function in adult tissues as well as embryonic cells in the context of diapause. The establishment of dormancy is an active process that involves extensive transcriptional, epigenetic, and metabolic rewiring. How these processes are coordinated to successfully transition cells to the resting dormant state is not known. Here we show that microRNA activity, which is normally dispensable for pre-implantation development, is essential for the adaptation of early mouse embryos to the dormant state of diapause. In particular, the pluripotent epiblast depends on miRNA activity, the absence of which results in loss of pluripotency and embryo collapse. Through tissue-specific small RNA profiling of single embryos and computational analyses of miRNA targets, we identified the miRNA-protein network of diapause. Individual miRNA function contributes to combinatorial regulation by the network of most notably RNA processing and chromatin modifier proteins. Without miRNAs, multiple nuclear and cytoplasmic bodies show aberrant expression and structure in normal ESCs and fail to reorganize in response to stress. We find extensive alternative splicing in wild-type, but not miRNA-deficient ESCs, of cell cycle and metabolic regulators. Our results reveal that miRNAs are critical for the transcriptional and structural rewiring of pluripotent cells in response to stress and to establish dormancy in the pluripotent state.

2024-03-26 | PXD044550 | Pride

Deciphering microRNAs and other small RNAs during the transition of dormant embryo into germinated embryo in larch (Larix leptolepis)

2014-07-19 | GSE49059 | GEO

Deciphering microRNAs and other small RNAs during the transition of dormant embryo into germinated embryo in larch (Larix leptolepis)

Project description:To investigate the roles of sRNAs in keeping embryo dormancy or germination in Larix leptolepis, we deciphered the endogenous "sRNAome" in dormant and germinated embryos. High-throughput sequencing of the sRNA libraries showed that dormant embryos exhibited a length bias towards 24-nt, while germinated embryos showed a bias towards a 21-nt and/or 22-nt length. Both of proportions for miRNAs to the non-redundant and redundant sRNAs were higher in germinated embryos than those in dormant embryos, while the ratio of unknown sRNAs was higher in dormant embryos than in germinated embryos. The proportion of 21-nt and 22-nt sRNAs increased in germinated embryos, which might attribute to the higher expression level of miRNAs. We identified a total of 160 conserved miRNAs from 39 families, 16 novel miRNAs, and 14 plausible miRNA candidates, of which novel and non-conserved known miRNAs might be the main contributors. These findings indicate that larch and possibly other gymnosperms have complex mechanisms of gene regulation involving sRNAs and miRNAs operating transcriptionally and post-transcriptionally during embryo dormancy and germination. One embryogenic cell line of Japanese larch (Larix leptolepis), designated as D878, with a high embryo maturation capacity was used in this study. Embryogenic callus were induced from immature embryos of larch on induction medium, followed by sub-culture, and culture on ABA-containing mature medium in a dark environment at 25 2 C. After cultured 45 days in mature medium, embryogenic calli developed into mature somatic embryos. In our study, the samples were harvested at day 57, one sample was collected after mature embryos continued to stay for 12 days on ABA-containing medium, and the other one was harvested after cultured for 12 days on ABA-removing medium. All samples were snap-frozen in liquid nitrogen, and stored in liquid nitrogen until RNA extraction.

2014-07-19 | E-GEOD-49059 | biostudies-arrayexpress

Metabolic control over mTOR dependent diapause-like state

Project description:Regulation of embryonic diapause, dormancy that interrupts the tight connection between develop- mental stage and time, is still poorly understood. Here, we characterize the transcriptional and metabolite profiles of mouse diapause embryos and identify unique gene expression and metabolic signatures with activated lipolysis, glycolysis, and metabolic pathways regulated by AMPK. Lipolysis is increased due to mTORC2 repression, increasing fatty acids to support cell survival. We further show that starvation in pre-implantation ICM-derived mouse ESCs induces a reversible dormant state, transcriptionally mimicking the in vivo diapause stage. During starvation, Lkb1, an upstream kinase of AMPK, represses mTOR, which induces a revers- ible glycolytic and epigenetically H4K16Ac-negative, diapause-like state. Diapause furthermore activates expression of glutamine transporters SLC38A1/2. We show by genetic and small molecule inhibitors that glutamine transporters are essential for the H4K16Ac-negative, diapause state. These data sug- gest that mTORC1/2 inhibition, regulated by amino acid levels, is causal for diapause metabolism and epigenetic state.

2020-01-14 | GSE143494 | GEO

The proteomics of dormancy: lessons from encysted hydrated embryos of an aquatic invertebrate

Project description:Dormancy is displayed by several organisms when environmental conditions cannot support their regular life activities. Numerous aquatic invertebrates survive for decades in a hydrated state as encysted embryos. In search for functional pathways that are associated with this form of dormancy, we used label-free quantitative proteome profiling and compared the proteomes of encysted dormant embryos (“resting eggs”; RE) with non-dormant embryos (amictic eggs; AM) of the rotifer Brachionus plicatilis. We also compared resting eggs (RE) before and after an obligatory dormant period (E0). A total of 2,631 proteins were identified in AM, RE and E0 eggs. Significantly lower numbers of proteins were determined for RE and E0, compared with AM. About 80% of the proteins were upregulated in AM, in the comparisons of AM vs. RE and AM vs. E0. The differentially expressed proteins were assigned to a large number of putative functional pathways, demonstrating the dramatic changes occurring during dormancy.

2017-07-25 | PXD003395 | Pride

TET activity propagates transcriptional memory through embryonic dormancy

Project description:Dormancy is an essential biological process for the propagation of many life forms through generations and stressful conditions. Early embryos of many mammals are preservable for weeks to months within the uterus under dormancy, which can be induced in vitro through mTOR inhibition. Dormancy features silencing of the genome and abundant heterochromatin formation, which conflicts with the permissive and uncommitted genomic profile of pluripotent cells. Cellular strategies to maintain pluripotency in the fate of this conflict are not known. Here we probed chromatin regulation during embryonic stem cells’ (ESC) entry into dormancy to identify mechanisms that ensure faithful propagation of cellular identity through dormancy. We show a global increase in DNA methylation and loss of chromatin accessibility in dormant ESCs and find that TET DNA demethylases are essential to counteract this trend at key pluripotency regulatory elements, particularly at young LINE1 repeats and active enhancers. Demethylation of these targets by TETs is essential for transcription factor (TF) recruitment and transient chromatin decondensation before hypercompaction. We propose that key regulatory elements are bookmarked coordinately by TETs and TFs in dormancy for maintenance of cellular identity. Perturbation of TET activity compromises embryo survival through dormancy; whereas its enhancement improves survival rates. Our results reveal the first essential chromatin regulator in establishing mammalian embryonic dormancy and pave the way to building its temporal regulatory code in embryonic and adult tissues.

2024-03-22 | PXD039056 | Pride

affy_sunflower_2010_13-ROS and hormones in sunflower seed dormancy.

Project description:affy_sunflower_2010_13 - affy_sunflower_2010_13 - It concerns the interaction between ROS and hormones in dormancy release in sunflower seeds. ABA is responsible for dormancy maintenance, while GA and ethylene promote seed germination. Based on our results, ROS could represent good candidate to shift from a hormone signalling to another determining the dormancy state in sunflower seeds.-We aim to understand the mechanisms controlling sunflower seed dormancy at the transcriptomic level, by the application of treatments which maintain dormancy as ABA, or alleviate dormancy as ROS and ethylene. Transcripts comparison will be performed between dormant and non-dormant sunflower embryo imbibed 24h on water, on ABA, on methylviologen, a pro-oxidant compound or on ethylene. 12 arrays - SUNFLOWER; treated vs untreated comparison

2013-08-01 | E-GEOD-44165 | biostudies-arrayexpress

affy_sunflower_2010_13-ROS and hormones in sunflower seed dormancy.

2013-08-01 | GSE44165 | GEO