Journal: EMBO Reports
Article Title: RIPK1 ablation in T cells results in spontaneous enteropathy and TNF-driven villus atrophy
doi: 10.1038/s44319-025-00441-5
Figure Lengend Snippet: ( A – C ) Representative images of ( A ) aged Ripk1 ΔCD4 mice ( n = 15) and Ripk1 ΔCD4 Casp8 ΔCD4 mice ( n = 16) alongside their respective littermate controls Ripk1 FL/FL mice ( n = 16) and Ripk1 FL/FL Casp8 FL/FL mice ( n = 14), ( B ) their spleen and mLN as well as ( C ) their small intestines (SI). ( D ) Absolute numbers of CD4 + T cells in the spleen of Ripk1 ΔCD4 and Ripk1 ΔCD4 Casp8 ΔCD4 mice, and their respective Ripk1 FL/FL and Ripk1 FL/FL Casp8 FL/FL littermates with n = 4 mice per group, measured by flow cytometry. ( E ) Representative H&E staining on duodenum sections from aged Ripk1 ΔCD4 mice ( n = 5) and Ripk1 ΔCD4 Casp8 ΔCD4 mice ( n = 4) and their respective littermate controls Ripk1 FL/FL mice ( n = 6) and Ripk1 FL/FL Casp8 FL/FL mice ( n = 5). ( F – H ) Quantification of ( F ) the average crypt depth, ( G ) average villus length, and ( H ) Ki-67+ cells in the duodenum of Ripk1 ΔCD4 Casp8 ΔCD4 mice ( n = 4) and Ripk1 FL/FL Casp8 FL/FL littermates ( n = 5). ( I ) Absolute numbers of TCRβ + CD4 + , TCRβ + CD8β + , TCRβ + CD4 - CD8β - and TCRγδ + IELs in the SI epithelial layer of young Ripk1 ΔCD4 mice ( n = 4) and Ripk1 ΔCD4 Casp8 ΔCD4 mice ( n = 4) and their respective littermate controls Ripk1 FL/FL mice ( n = 4) and Ripk1 FL/FL Casp8 FL/FL mice ( n = 3), measured by flow cytometry. The corresponding statistical analysis is depicted in Fig. . ( J ) Tissue concentrations of TNF in the SI of young Ripk1 ΔCD4 mice ( n = 7) and Ripk1 ΔCD4 Casp8 ΔCD4 mice ( n = 4) and their respective littermates Ripk1 FL/FL ( n = 4) and Ripk1 FL/FL Casp8 FL/FL ( n = 5), measured by multiplex analysis (Meso Scale Discovery). ( K – M ) Quantification of the ( K ) absolute small intestine (SI) length, ( L ) Crypt depth, and ( M ) Villus length, of aged Ripk1 ΔCD4 mice ( n = 8) and Ripk1 FL/FL littermates ( n = 10), and Ripk1 ΔCD4 Tnfr1 −/− mice ( n = 5) and Ripk1 FL/FL Tnfr1 −/− littermates ( n = 5). Data are representative of two ( D , I – M ) or three repeats ( A – C , E – H ). Data are shown as mean ± SEM, with means being represented by bars or horizontal lines and each dot representing an individual mouse. Statistical significance was calculated in Graphpad Prism by two-sided unpaired t-test with Welch’s correction ( F ) p = 0.1821, ( G ) p = 0.123, ( H ) p = 0.9497, or two-way ANOVA on Log 2 -transformed data ( D ) Ripk1 FL/FL vs Ripk1 ΔCD4 : p = 0.0002, Ripk1 ΔCD4 vs Ripk1 ΔCD4 Casp8 ΔCD4 : p < 0.0001, Ripk1 FL/FL Casp8 FL/FL vs Ripk1 ΔCD4 Casp8 ΔCD4 : p = 0.4399; ( I ) corresponding statistical analysis is depicted for each population in Fig. ; ( J ) Ripk1 FL/FL vs Ripk1 ΔCD4 : p = 0.0034, Ripk1 ΔCD4 vs Ripk1 ΔCD4 Casp8 ΔCD4 : p = 0.0182, Ripk1 FL/FL Casp8 FL/FL vs Ripk1 ΔCD4 Casp8 ΔCD4 : p = 0.8625; ( K ) Ripk1 FL/FL vs Ripk1 ΔCD4 ( TNFR1 +/+ ): p < 0.0001, Ripk1 FL/FL vs Ripk1 ΔCD4 ( TNFR1 −/− ): p = 0.0045, TNFR1 +/+ vs TNFR1 −/− ( Ripk1 ΔCD4 ): p = 0.8363; ( L ) Ripk1 FL/FL vs Ripk1 ΔCD4 ( TNFR1 +/+ ): p < 0.0001, Ripk1 FL/FL vs Ripk1 ΔCD4 ( TNFR1 −/− ): p = 0.0004, TNFR1 +/+ vs TNFR1 −/− ( Ripk1 ΔCD4 ): p = 0.3015; ( M ) Ripk1 FL/FL vs Ripk1 ΔCD4 ( TNFR1 +/+ ): p < 0.0001, Ripk1 FL/FL vs Ripk1 ΔCD4 ( TNFR1 −/− ): p = 0.9755, TNFR1 +/+ vs TNFR1 −/− ( Ripk1 ΔCD4 ): p = 0.0009. ns = non-significant, * p < 0.05, ** p < 0.01, *** p < 0.001, **** p < 0.0001. Young mice: 8–12 weeks old. Aged mice: >6 months old. IEL intraepithelial lymphocytes. .
Article Snippet: Tnfr1-deficient mice (Tnfr1 −/− ) , Pfeffer et al, ; purchased from Jackson Laboratory , 002818.
Techniques: Flow Cytometry, Staining, Multiplex Assay, Transformation Assay