Dnmt3a is downregulated by Stat5a and mediates G0/G1 arrest by suppressing the miR-17-5p/Cdkn1a axis in Jak2V617F cells

Analysis of long Non-Coding RNA and mRNA expression in Clostridium butyricum-Induced apoptosis in SW480 colon cancer cells

Colon cancer is a leading cause of cancer-related deaths worldwide and has been increasingly linked to the gut microbiome. Clostridium butyricum (CB), a probiotic, has demonstrated potential in influencing colon cancer cell behavior, particularly through the modulation of long non-coding RNAs (lncRNAs) and mRNAs. This study examines the effects of CB on the expression of lncRNAs and mRNAs in SW480 colon cancer cells and their association with apoptosis. SW480 cells were co-cultured with CB, and total RNA was extracted for microarray analysis to identify differentially expressed lncRNAs and mRNAs. Quantitative real-time PCR and fluorescence staining were utilized to validate the expression changes of selected lncRNAs and to assess markers of apoptosis. Pathway enrichment analysis was performed to explore the biological functions of genes with altered expression. Co-culture with CB resulted in significant changes in lncRNA and mRNA expression, with 50 lncRNAs upregulated and 152 downregulated by more than five-fold. Similarly, 738 mRNAs were upregulated, while 1,088 were downregulated. Apoptosis analysis revealed that CB treatment induced apoptosis in SW480 cells, as evidenced by the upregulation of pro-apoptotic genes such as CASP1, TNF, and BNIP3L, and the downregulation of anti-apoptotic BCL family members. Pathway analysis suggested the involvement of the MAPK signaling pathway, cytokine-cytokine receptor interactions, and other pathways associated with tumor progression. These findings suggest that CB regulates the expression of lncRNAs and mRNAs involved in apoptosis and tumor progression, highlighting their potential as biomarkers and therapeutic targets in colorectal cancer. This study provides a novel therapeutic strategy for colon cancer treatment.

Lnc-EST12, which is negatively regulated by mycobacterial EST12, suppresses antimycobacterial innate immunity through its interaction with FUBP3

Long noncoding RNAs (lncRNAs) have been implicated in the pathogenesis of intracellular pathogens. However, the role and mechanism of the important lncRNAs in Mycobacterium tuberculosis (M.tb) infection remain largely unexplored. Recently, we found that a secreted M.tb Rv1579c (an early secreted target with a molecular weight of 12 kDa, named EST12) protein activates NLRP3-gasdermin D (GSDMD)-mediated pyroptosis and plays a pivotal role in M.tb-induced immunity. In the present study, M.tb and the EST12 protein negatively regulated the expression of a key lncRNA (named lnc-EST12) in mouse macrophages by activating the JAK2-STAT5a signaling pathway. Lnc-EST12, with a size of 1583 bp, is mainly expressed in immune-related organs (liver, lung and spleen). Lnc-EST12 not only reduces the expression of the proinflammatory cytokines IL-1β, IL-6, and CCL5/8 but also suppresses the NLRP3 inflammasome and GSDMD pyroptosis-IL-1β immune pathway through its interaction with the transcription factor far upstream element-binding protein 3 (FUBP3). The KH3 and KH4 domains of FUBP3 are the critical sites for binding to lnc-EST12. Deficiency of mouse lnc-EST12 or FUBP3 in macrophages increased M.tb clearance and inflammation in mouse macrophages or mice. In conclusion, we report a new immunoregulatory mechanism in which mouse lnc-EST12 negatively regulates anti-M.tb innate immunity through FUBP3.