Journal: medRxiv
Article Title: Trajectories of microbiome-derived bile acids in early life – insights into the progression to islet autoimmunity
doi: 10.1101/2025.02.18.25322275
Figure Lengend Snippet: a. Schematic of the Th17 and iTreg differentiation protocol for primary human naïve CD4 + CD25 - T cells isolated from the umbilical cord blood of healthy neonates. CD4 + CD25 - T cells were activated with anti-CD3/anti-CD28 and differentiated into Th17 or iTreg cells in the presence of corresponding cytokines for 3 days. DMSO control or conjugated bile acids (Asn-UDCA, Ser-CDCA, Tyr-CDCA, and unconjugated UDCA) at 100 µM were added on day 0 of differentiation. b-e. IL-17a secretion in the supernatant of Th17 cultures treated with Asn-UDCA ( b ), Ser-CDCA ( c ), Tyr-CDCA ( d ), and UDCA ( e ) was quantified on day 3 of differentiation from four biological replicates using ELISA. f-i. Intracellular Foxp3 protein expression in iTregs cultured with Asn-UDCA ( f ), Ser-CDCA ( g ), Tyr-CDCA ( h ), or UDCA ( i ) was assessed on day 3 of differentiation by flow cytometry. Geometric mean fluorescence intensity (MFI) values are shown for four biological replicates. Statistical significance was determined using paired, two-tailed Student’s t-test.
Article Snippet: After differentiation, secreted IL-17a levels were determined from Th17 cell-culture supernatants at 72 hours using the human IL-17a DuoSet ELISA kit (R&D Systems, Cat# DY317-05, DY008).
Techniques: Isolation, Control, Enzyme-linked Immunosorbent Assay, Expressing, Cell Culture, Flow Cytometry, Fluorescence, Two Tailed Test