GEOapplication/xmlftp://ftp.ncbi.nlm.nih.gov/geo/series/GSE306nnn/GSE306321/primaryOK200TranscriptomicsMus musculusExpression profiling by high throughput sequencinghttps://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE306321GEOGSEfalseSingle-cell RNA sequencing reveals Lin28b-dependent immune modulation in the PDAC tumor microenvironmentCancer-associated fibroblasts (CAFs) play a crucial role in shaping the pancreatic ductal adenocarcinoma (PDAC) tumor microenvironment (TME). This study investigates the impact of an RNA-binding protein Lin28b on the immune landscape of PDAC. Single-cell RNA sequencing (scRNA-seq) was performed on orthotopic pancreatic tumors from wild-type (WT) and fibroblast-specific Lin28b knockout (Fsp-Cre;Lin28bfl/fl) mice. Our analysis revealed that Lin28b expression in CAFs promotes an immunosuppressive TME characterized by reduced immune cell infiltration and dampened type I interferon (IFN) signaling. Conversely, Lin28b deletion in CAFs resulted in increased infiltration of immune cells, particularly CD8+ T cells and enhanced cytotoxic T cell activity. These findings identify Lin28b as a CAF-intrinsic molecular brake on anti-tumor immunity and provide a rationale for targeting the Lin28 to overcome PDAC resistance to immunotherapy.2026/06/21GSE306321GSM9197382GSM9197383GSM9197380GSM9197381GSM9197379GSM919737824247306321Mus musculus