Journal: Frontiers in Immunology
Article Title: TSC1 deficiency drives immune evasion in colorectal cancer via mTORC1-mediated dysregulation of PD-L1 sialylation
doi: 10.3389/fimmu.2025.1692210
Figure Lengend Snippet: TSC1 deficiency remodels sialic acid metabolic homeostasis via the mTORC1-S6K1 signaling pathway and promotes tumor immune escape. (A) qPCR analysis of ST6GALNAC1, Neu4, and NPL mRNA expression. (B) Representative Western blot images showing the expression levels of ST6GALNAC1, Neu4, and PD-L1 in indicated groups. (C) Analysis of PD-L1 sialylation levels by lectin blot assay. (D) Assessment of CD8+ T cell cytotoxic function. Data are presented as mean ± SEM (n=3). *** p < 0.001, ** p < 0.01, * p < 0.05 vs control group.
Article Snippet: Membranes were blocked with 5% non-fat dry milk in TBST for 1 h at room temperature before incubation with biotinylated Sambucus nigra lectin (SNA, Vector Laboratories; Cat# B-1305; 1:1000 dilution in blocking buffer) at 4°C overnight to specifically detect α2,6-linked sialic acid modifications.
Techniques: Expressing, Western Blot, Control