Project description:The human small intestine is the key organ for absorption, metabolism, and excretion of orally administered drugs. To preclinically predict these reactions in drug discovery research, a cell model that can precisely recapitulate the in vivo human intestinal monolayer is desired. Here, we developed a monolayer platform using human biopsy-derived duodenal organoids for application to pharmacokinetic studies. The human duodenal organoid-derived monolayer was prepared by a simple method in 3–8 days. It consisted of polarized absorptive cells and had a barrier function. It showed much higher cytochrome P450 (CYP) 3A4 and carboxylesterase (CES) 2 activities than Caco-2 cells. It also showed efflux activity of P-glycoprotein (P-gp) and inducibility of CYP3A4. Finally, its gene expression profile was closer to the adult human duodenum, compared to the profile of Caco-2 cells. Based on these findings, this monolayer assay system using biopsy-derived human intestinal organoids is likely to be widely adopted.
Project description:Transcriptomic profiles of 6 commercially-available human patient-derived gastrointestinal organoid lines were obtained and compared to transcriptomic profile of a commercially available human iPSC-induced colon organoid line. Transcriptomic profile of iPSC-derived human colon organoid line was compared after culture in either Corning growth-factor-reduced Matrigel (Corning 356231) or MilliporeSigma growth-factor-reduced ECMGel (E6909)
Project description:Metabolic dysfunction-associated steatohepatitis (MASH) is a progressive disease linked to conditions like fibrosis, cirrhosis, and liver cancer, often resulting in higher mortality rates, primarily due to cardiovascular events. While MASH is closely tied to metabolic syndrome, recent research underscores the importance of the gut-liver axis in its pathogenesis, an aspect less explored in human studies. To address this gap, duodenal epithelial organoids were generated from both MASH and healthy (controls) subjects. Organoid formation efficiency was similar between controls derived epithelial organoids (CDEOs) and MASH derived epithelial organoids (MDEOs) groups. Variability in growth patterns was observed, with MDEOs frequently exhibiting cystic spheroid morphology. MASH-derived organoids displayed altered homeostasis and digestive potential in the duodenal epithelium. Despite potential lineage bias, MDEOs retained their lipid metabolic capacity, possibly mediated by lipid oxidation in stem/progenitor cells. Notably, cell adhesion components were misexpressed in MASH-derived organoids, indicating significant intrinsic alterations in cell-cell adhesion potential compared to controls. However, MDEOs maintained transepithelial electric resistance and leak pathway integrity, indicating that the intestinal epithelial barrier remained functionally intact in MDEOs under tested conditions. This study sheds light on the intricate dynamics of duodenal epithelial alterations in MASH, highlighting potential therapeutic avenues for restoring intestinal homeostasis.
Project description:Three wild type cell lines (WTC:ACTN2-eGFP, WTC:Myl2-eGFP, SCVI114) and three genetically modified cell lines (PM28, PM52, Del33) were differentiated using two monolayer (atrial and ventricular) and two organoid (also atrial and ventricular) differentiation protocols. Cells from multiple samples at differentiation day 15 (wild type cell lines) and day 30 (all cell lines) were isolated, multiplexed using the MULTI-seq approach; subsequently library preparation (10X platform) and sequencing was performed.
Project description:Background: Duodenal adenoma/adenocarcinomas are rare, and the global gene expression changes associated with the initial stages of carcinogenesis of these neoplasms have not been elucidated. Results: To comprehensively analyze genetic markers and pathways specific to early-stage duodenal adenoma/adenocarcinomas, transcriptional profiles of 4 fresh-frozen non-ampullary duodenal adenoma/adenocarcinomas and surrounding duodenal normal mucosa were compared. Key features of gene expression analysis demonstrated a strong correlation between these tumors and colorectal adenomas, as well as the Wnt/β-catenin pathway. These results shed new light on the transcriptional changes that occur during the early stages of duodenal tumorigenesis. All samples were obtained prior to treatment in order to minimize effects of cauterization, and immediately fresh-frozen.