Project description:The addition of 5uM retinoic acid to kidney organoids at day 12 (day 7+5). This data is from the same experimental batch as data within GSE119561.
Project description:Retinoic acid promotes the in vitro growth, patterning and improves the cellular composition of human pluripotent stem-cell-derived intestinal organoids
Project description:During kidney development, an intermediate mesoderm (IM) give rise to distinct structures: the ureteric bud (UB) and the metanephric mesenchyme (MM). These structures differentiate further into the collecting duct and nephron, forming a mature kidney. Generating functional kidney organoids has been challenging due to incomplete development of the UB. Researchers have overcome this limitation by differentiating UB and MM separately and co-culturing them to generate kidney organoids. However, this study developed a co-culture-free method using retinoic acid (RA), plays important role in the anterior IM differentiation and BMP7 secreted by UB in vivo development. This protocol provided not only simplifies the complexity of kidney organoid generation but also advances our understanding of the crucial signaling pathways involved in kidney development.
Project description:During kidney development, an intermediate mesoderm (IM) give rise to distinct structures: the ureteric bud (UB) and the metanephric mesenchyme (MM). These structures differentiate further into the collecting duct and nephron, forming a mature kidney. Generating functional kidney organoids has been challenging due to incomplete development of the UB. Researchers have overcome this limitation by differentiating UB and MM separately and co-culturing them to generate kidney organoids. However, this study developed a co-culture-free method using retinoic acid (RA), plays important role in the anterior IM differentiation and BMP7 secreted by UB in vivo development. This protocol provided not only simplifies the complexity of kidney organoid generation but also advances our understanding of the crucial signaling pathways involved in kidney development.
Project description:Liver fibrosis majorly impacts global health, necessitating development of in vitro models to study disease mechanisms and develop drug therapies. Relevant models should at least include hepatocytes and hepatic stellate cells (HSCs) and ideally use three-dimensional cultures to mimic in vivo conditions. Induced pluripotent stem cells (iPSCs) allow patient-specific liver modelling, but current models based on iPSC-derived hepatocytes (iHepatocytes) and HSCs (iHSCs) still lack key functions. We developed organoids of iHepatocytes and iHSCs, and compared them to HepaRG and primary HSC organoids. RNA-sequencing analysis comparison of these cultures identified a potential role for the transcription factor RXRA in hepatocyte differentiation and HSC quiescence. Treating cells with the RXRA ligand 9-cis-retinoic acid (9CRA) promoted iHepatocyte metabolism and iHSC quiescence. In organoids, 9CRA enhanced fibrotic response to TGF-β and acetaminophen, highlighting its potential for refining iPSC-based liver fibrosis models to more faithfully replicate human drug-induced liver injury and fibrotic conditions.
Project description:We are presenting the application of toxicogenomics in the evaluation of the toxic effects of retinoic acid and one of its isoforms the 9-cis retinoic acid. The main goal is to distinguish the pattern of action of the both chemical compounds and their action in an extended exposure. The results suggest a different pattern within the days and the chemicals. Representatives of each GO functional groups were selected and quantified by real-time PCR to validate the microarray data and to differentiate the action of retinoic acid compounds studied.