Journal: Cellular and Molecular Gastroenterology and Hepatology
Article Title: An Epigenetic Basis for Sustained Inflammatory Epithelial Progenitor Cell States in Crohn’s Disease
doi: 10.1016/j.jcmgh.2025.101665
Figure Lengend Snippet: ISP state can be experimentally induced in patient-derived colonoids. ( A ) Schematic of experimental approach and data presentation. ( B ) Expression of ISP marker genes in colonoids from CD or control subjects (N = 3 each, Passage = 4–6). ( C ) Correlation analysis of HLA-DRA gene expression in the study subjects’ biopsies (scRNA-seq data, epithelial cluster) vs HLA-DR protein expression in colonoids (N = 4 controls and 5 Crohn's) from corresponding subjects (flow cytometry), comparing colonoids grown either in stem cell-enriching expansion medium ( black squares ) or differentiation medium ( open circles ). ( D ) Representative images of immunostaining for LCN2, CD74, HLA-DR in colonoids from study subjects. Asterisk denotes an ISP. Quantified in ( E ): N = 2 lines (n = 12 high power fields) per group, Passage = 7–8. ( F ) Quantification (flow cytometry) of %HLA-DR+ cells in colonoids treated with the inflammatory cocktail (20 ng/mL IL-1beta, 100 ng/mL TNF-alpha, 1 μg/mL flagellin, and 10 ng/mL IL-6) for 24 hours (N = 7 or 8 lines from control subjects or patients with CD, respectively, Passage = 6–8). P values: ( B ) Mann-Whitney test (unpaired, 2-tailed), ( E–F ) ordinary 2-way analysis of variance with Sidak’s multiple comparisons.
Article Snippet: Real-time quantitative polymerase chain reaction (RT-qPCR) was performed with TaqMan probes (TBP1: Hs00427621_m1; LCN2: Hs01008571_m1; HLA-DRA: Hs00219575_m1; HLA-DPA1: Hs00410276_m1; CD74: Hs00269961_m1) and TaqMan Fast Universal PCR Master Mix 2X (Catalog #4352042).
Techniques: Derivative Assay, Expressing, Marker, Control, Gene Expression, Flow Cytometry, Immunostaining, MANN-WHITNEY