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The temporal transcriptomic signature of cartilage formation

ABSTRACT: The temporal transcriptomic signature of cartilage formation

PROVIDER: PRJEB60592 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR11011000.fastq.gz	Fastqsanger.gz
	ERR11011001.fastq.gz	Fastqsanger.gz
	ERR11011002.fastq.gz	Fastqsanger.gz
	ERR11011003.fastq.gz	Fastqsanger.gz
	ERR11011004.fastq.gz	Fastqsanger.gz

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The temporal transcriptomic signature of cartilage formation

Project description:To study chondrogenesis, we used a chicken limb bud model: We used RNA sequencing, and examined the differences between gene expression patterns during cartilage formation in micromass cultures of embryonic limb bud-derived progenitors. We sequenced in triplicate at Day 0,1,2,3,4,6,10,15 and also from mature birds.

2023-03-28 | E-MTAB-12770 | biostudies-arrayexpress

The temporal transcriptomic signature of cartilage formation.

Project description:Chondrogenesis is a multistep process, in which cartilage progenitor cells generate a tissue with distinct structural and functional properties. Although several approaches to cartilage regeneration rely on the differentiation of implanted progenitor cells, the temporal transcriptomic landscape of in vitro chondrogenesis in different models has not been reported. Using RNA sequencing, we examined differences in gene expression patterns during cartilage formation in micromass cultures of embryonic limb bud-derived progenitors. Principal component and trajectory analyses revealed a progressively different and distinct transcriptome during chondrogenesis. Differentially expressed genes (DEGs), based on pairwise comparisons of samples from consecutive days were classified into clusters and analysed. We confirmed the involvement of the top DEGs in chondrogenic differentiation using pathway analysis and identified several chondrogenesis-associated transcription factors and collagen subtypes that were not previously linked to cartilage formation. Transient gene silencing of ATOH8 or EBF1 on day 0 attenuated chondrogenesis by deregulating the expression of key osteochondrogenic marker genes in micromass cultures. These results provide detailed insight into the molecular mechanism of chondrogenesis in primary micromass cultures and present a comprehensive dataset of the temporal transcriptomic landscape of chondrogenesis, which may serve as a platform for new molecular approaches in cartilage tissue engineering.

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Project description:Transcriptomic signature of cartilage formation

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GRNs driving cartilage and bone formation interact via averaging and synergism during cartilage maturation

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Project description:Chondrocytes from extra fingers exhibited a high proliferative capacity: the cells reached to population doublings (PD) 30-35 within 4 weeks before replicative senescence. The propagated cells formed hyaline cartilage at 2 weeks after subcutaneous implantation of NOD/Scid/IL-2 receptor gamma knock out (NOG) mice, and the generated cartilage showed enchondral ossification at 8 to 12 weeks. The cartilage formation with osteogenesis depends on the number of cell division in vitro. Keywords: NCCH BioResource Affymetrix human U133 plus 2.0 array was used to transcriptionally profile to determine the expression changes in epiphyseal cartilage.

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Creb5 coordinates synovial joint formation with the genesis of articular cartilage

Project description:While prior work has established that articular cartilage arises from Prg4-expressing perichondrial cells, it is not clear how this process is specifically restricted to the perichondrium of synovial joints. We document that the transcription factor Creb5 is necessary to initiate the expression of signaling molecules that both direct the formation of synovial joints and guide perichondrial tissue to form articular cartilage instead of bone. Creb5 promotes the generation of articular chondrocytes from perichondrial precursors in part by inducing expression of Wif1, which blocks a Wnt5a autoregulatory loop in the perichondrium. Postnatal deletion of Creb5 in the articular cartilage leads to loss of both flat superficial zone articular chondrocytes coupled with a loss of both Prg4 and Wif1 expression; and a non-cell autonomous up-regulation of Ctgf. Our findings indicate that Creb5 promotes both joint formation and the subsequent development of articular chondrocytes by disrupting a Wnt5a positive-feedback loop in the perichondrium.

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Project description:Equine cartilage from young and old donors was used for RNA-Seq analysis. The aim of the study was to identify differentially expressed cartilage transcripts in ageing in order to to characterize molecular mechanisms associated with age-related changes in

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