Journal: Frontiers in Immunology
Article Title: Regulation of CEACAM Family Members by IBD-Associated Triggers in Intestinal Epithelial Cells, Their Correlation to Inflammation and Relevance to IBD Pathogenesis
doi: 10.3389/fimmu.2021.655960
Figure Lengend Snippet: C2BBe1 cells cultured for 3 h with the pro-inflammatory cytokine cocktail containing recombinant human (rh) TNF-α (20 ng/ml), rh IFN-γ (10 ng/ml), rh IL-1β (10 ng/ml), and untreated. After the 3 h co-culture (T0), cells are washed followed by further culture in full culture media for 2 (T2), 5 (T5), and 13 (T13) h. Samples are collected at T0, T2, T5, and T13 time points for analysis on gene and protein expression of (A, B) CEACAM1, (C, D) CEACAM3, (E, F) CEACAM5, (G, H) CEACAM6, (H, I) CEACAM7, and (J) IL-8 as determined by RT q-PCR, flow cytometry (CEACAM1, -3, -5), WB (CEACAM6 and 7). For gene expression analysis, graphs are representative of three to five independent experiments with pooled triplicate samples and RT-qPCR assay performed in duplicates. β-actin was used as a housekeeping gene, and results are expressed as fold change. For protein analysis with flow cytometry and WB, graphs are representative of two independent experiments with pooled duplicates/triplicates. In the flow cytometry graphs (B, D, F) white colums represent untreated samples and black columns represent cytokine cocktail treated samples collected at T5. A Student t-test was used to analyze gene and protein data. *P < 0.05, **P < 0.01, ***P < 0.001 when compared to untreated cells. UT, untreated; CK, cytokine cocktail treatment.
Article Snippet: Samples were run on Bolt 4–12% gradient Bis-Tris Plus Gels (cat nr. NW04122Box, Thermo Fisher Scientific) at 120 V for 1 h and transferred to a Immobilon PVDF membrane (Millipore) for 1 h. Membranes were washed in Tris Buffer Saline (TBS) and blocked for 1 h in 5% skimmed milk (0.5% Tween20 in TBS), followed by incubation overnight and rocking at 4°C with the primary antibodies [human CEACAM6/CD66c (Mouse IgG2A, Clone #439424, cat nr. MAB3934-SP, R&D-Biotechne); human CEACAM7 (Sheep IgG, cat nr. AF4478, R&D-Biotechne); β-actin (Mouse IgG2b, cat nr. 8H10D10, Cell Signaling Technology], diluted at 1:1,000 in 5% BSA/TBS-T.
Techniques: Cell Culture, Recombinant, Co-Culture Assay, Expressing, Flow Cytometry, Quantitative RT-PCR