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- W4212933369 abstract "De-synchronized circadian rhythm in tumors is coincident with aberrant inflammation and dysregulated metabolism. As their inter-relationship in cancer etiology is largely unknown, we investigated the link between the three in glioma. Tumor metabolite lactate- mediated increase in pro-inflammatory cytokine IL-1β was concomitant with elevated levels of core circadian regulators Clock and Bmal1. siRNA mediated knockdown of Bmal1 and Clock decreased (i) LDHA and IL-1β levels and (ii) release of lactate and pro-inflammatory cytokines. Lactate mediated deacetylation of Bmal1 and its interaction with Clock, regulate IL-1β levels and vice versa. Site-directed mutagenesis and luciferase reporter assay indicated the functionality of E-box sites on LDHA and IL-1β promoters. ChIP-re-ChIP revealed that lactate-IL-1β crosstalk positively affects co-recruitment of Clock-Bmal1 to these E-box sites. Clock-Bmal1 enrichment was accompanied by decreased H3K9me3, and increased H3K9ac and RNA pol II occupancy. Lactate-IL-1β-Clock (LIC) loop positively regulated expression of genes associated with cell cycle, DNA damage and cytoskeletal organization involved in glioma progression. TCGA data analysis suggested the presence of lactate- IL-1β-crosstalk in other cancers. The responsiveness of stomach and cervical cancer cells to lactate inhibition followed the same trend exhibited by glioma cells. In addition, components of LIC loop were found to be correlated with (i) patient survival, (ii) clinically actionable genes, and (iii) anti-cancer drug sensitivity. Our findings provide evidence for a potential cancer-specific axis wiring of IL-1β and LDHA through Clock -Bmal1, the outcome of which is to fuel an IL-1β-lactate autocrine loop that drives pro-inflammatory and oncogenic signals. PMID: 34124933" @default.
- W4212933369 created "2022-02-24" @default.
- W4212933369 creator A5075526464 @default.
- W4212933369 date "2021-07-17" @default.
- W4212933369 modified "2023-09-26" @default.
- W4212933369 title "Faculty Opinions recommendation of Rewiring of lactate-IL-1β auto-regulatory loop with Clock-Bmal1: A feed-forward circuit in glioma." @default.
- W4212933369 doi "https://doi.org/10.3410/f.740295350.793587207" @default.
- W4212933369 hasPublicationYear "2021" @default.
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