High dietary tryptophan promotes mTOR activation in CD4+ T cells
(A–F) MFI of p4EBP1, pS6, and pAKTSer473 in Tem (A–C) and Treg (D–F) cells from TC mice fed low or high tryptophan for 1 month, N = 4.
(G) Representative Western blot analysis of TC Teff and Treg cells for p4EBP1 and β-actin. For Teff samples, high tryptophan group is on the left. For Treg samples, high tryptophan group is on the right.
(H–I) Quantification of Western blot results for p4EBP1 relative to β-actin, N = 5.
(J) Representative immunofluorescence staining for CD4, mTOR, and IgD in spleen sections from TC mice fed high or low tryptophan for 2 months. Arrow heads indicate mTOR+ CD4+ T cells. Graphs show individual mice with mean ± SEM t tests, ∗p < 0.05, ∗∗p < 0.01, ∗∗∗p < 0.001.