KLF10 deficiency in CD4+ T cells promotes atherosclerosis progression by altering macrophage dynamics
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ABSTRACT:
PROVIDER: PRJNA805540 | ENA |
REPOSITORIES: ENA
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Project description:KrÜppel-like factor 10 (KLF10), deficient in two thirds of 105 resected pancreatic adenocarcinoma (PDAC) patients, was associated with rapid loco-regional recurrence and large tumor size. Additional KLF10 depletion in KC (LSL: KrasG12D; Pdx1-CRE) mice accelerated progression from pancreatic intraepithelial neoplasia to PDAC. In Panc-1 cells with KLF10 deficiency (Panc-1-pLKO-shKLF10), increased sphere formation, stem cell markers expression, and tumor growth were noted compared with those of control. Over-expressing KLF10 genetically or pharmacologically using metformin, reversed the stem cell phenotypes induced by KLF10 depletion. Ingenuity pathway analysis and gene set enrichment analysis showed Notch signal molecules including Notch receptors 3 and 4 were over-expressed in Panc-1-pLKO-shKLF10. KLF10 transcriptionally suppressed Notch 3 and 4 receptors by competing with ELF3, a positive regulator, for promoter binding. Downregulating Notch signal genetically or pharmacologically ameliorated stem cell phenotypes of Panc-1-pLKO-shKLF10. Elevating KLF10 expression by metformin with concomitant evodiamine, a non-toxic Notch 3 methylation stimulator, delayed murine tumor growth of PDAC with KLF10 deficiency without prominent toxicity. These results demonstrated a novel signal pathway of KLF10 in modulating stem cell phenotypes of PDAC via transcriptional regulating Notch signal pathway. Elevating KLF10 and suppressing Notch signal may cooperatively reduce PDAC tumorigenesis and malignant progression.
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Project description:Nonalcoholic steatohepatitis (NASH), characterized by hepatic steatosis, inflammation, and liver injury, has become a leading cause of end-stage liver diseases and liver transplantation. Krüppel-like factors 10 (KLF10) is a Cys2/His2 zinc finger transcription factor that regulates cell growth, apoptosis, and differentiation. However, whether it plays a role in the development and progression of chronic liver diseases like NASH remains poorly understood. In the present study, we found that KLF10 expression was selectively upregulated in the mouse models and human patients with NASH, compared with simple steatosis (NAFL). Gain- and loss-of function studies demonstrated that hepatocyte-specific overexpression of KLF10 aggravated, whereas its depletion alleviated diet-induced NASH pathogenesis in mice. Mechanistically, transcriptomic analysis and subsequent functional experiments showed that KLF10 promotes hepatic lipid accumulation and inflammation through the palmitoylation and plasma membrane localization of fatty acid translocase CD36 via transcriptionally activation of zDHHC7. Indeed, both expression of zDHHC7 and palmitoylation of CD36 are required for the pathogenic roles of KLF10 in NASH progression. Thus, our results identify an important role for KLF10 in NAFL-to-NASH development through zDHHC7-mediated CD36 palmitoylation.
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