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• W4377943731 abstract "Abstract The gut plays a critical role in maintaining human health by facilitating the absorption of nutrients, regulating metabolism, and interacting with the immune system and gut microbiota. The co-culture of two human colorectal cancer cell lines, Caco-2 and HT29, on Transwell is commonly used as an in vitro gut mimic in studies of intestinal absorption pharmacokinetics, gut mechanics, and gut-microbe interplay given the similar morphology, expression of transporters and enzymes, and barrier function. However, to sufficiently evaluate the translatability of insights from such a system to human physiological contexts, a detailed survey of cell type heterogeneity in the system and a holistic comparison with human physiology are needed to be conducted rather than by the presence of a few well-studied proteins. Single-cell RNA sequencing provides high-resolution expression profiles of cells in the co-culture, enabling the heterogeneity to be characterized and the similarity to human epithelial cells to be evaluated. Transcriptional profiles of 16019 genes in 13784 cells were acquired and compared to human epithelial cells (GSE185224). We identified the intestinal stem cell-, transit amplifying-, enterocyte-, goblet cell-, and enteroendocrine-like cells together with differentiating HT29 cells in the system based on the expression of canonical markers in healthy adult human epithelial cells. The epithelium-like co-culture was fetal intestine-like, with less variety of gene expression compared to the human gut. Transporters for major types of substance (lipid, amino acid, ion, water, etc.) were found transcribed in the majority of the enterocytes-like cells in the system. However, some of the well-studied transporters such as FATP4 and GLUT2 were absent. Toll-like receptors were not highly expressed in the sample, yet the treatment of lipopolysaccharide still caused a mild change in trans-epithelial electrical resistance and gene expression, possibly by the interaction with CD14, the co-receptor for TLRs. Overall, the Caco-2/HT29 co-culture is a cost-effective epithelium model for drug permeability testing or mechanical simulation, but its phenotypic discrepancy with the real epithelium is not negligible. As a result, its response to biological factors might not provide transferrable knowledge to the study of human gut physiology, especially the innate immune aspect." @default.
• W4377943731 created "2023-05-25" @default.
• W4377943731 creator A5006813677 @default.
• W4377943731 creator A5019132775 @default.
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• W4377943731 creator A5049619157 @default.
• W4377943731 creator A5079908443 @default.
• W4377943731 date "2023-05-23" @default.
• W4377943731 modified "2023-10-18" @default.
• W4377943731 title "Detailed Survey of an in-vitro Intestinal Epithelium Model by Single-Cell Transcriptomics" @default.
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