Emerging Roles of C-Myc in Cancer Stem Cell-Related Signaling and Resistance to Cancer Chemotherapy: A Potential Therapeutic Target Against Colorectal Cancer.
UNR/<i>CSDE1</i> Expression Is Critical to Maintain Invasive Phenotype of Colorectal Cancer through Regulation of c-MYC and Epithelial-to-Mesenchymal Transition.
Our findings suggest an activation of the c-MYC-NAMPT-SIRT1 feedback loop that may crucially contribute to initiation and development of both routes to colorectal cancer.
Our work uncovers the role and deciphers the function of the EGFR-ERK-MYC axis as a repressor of HBD1 expression and contributes to the understanding of HBD1 suppression observed in colorectal cancer.
Amplification-dependent overexpression of 64 known driver oncogenes were found in 587 tumors (40%); genes frequently observed were MYC (25%) and MET (18%) in colorectal cancer; SKP2 (21%) in lung squamous cell carcinoma; HIST1H3B (19%) and MYCN (13%) in liver cancer; KIT (57%) in gastrointestinal stromal tumors; and FOXL2 (12%) in squamous cell carcinoma across tissues.
Moreover, inhibition of MYC target pyrimidine synthesis genes such as <i>CAD</i>, <i>UMPS</i>, and <i>CTPS</i> blocked cell growth, and thus are potential targets for colorectal cancer therapy.
The positive expression levels of Wnt/β-catenin/c-myc protein in the colorectal cancer group were higher than that in LST group, and the value of the PAs group was the lowest; differences were statistically significant (p < 0.05).
Blockade of the MAPK pathway synergistically sensitized colorectal cancer cells to BET inhibitors, leading to potent apoptosis and MYC downregulation <i>in vitro</i> and <i>in vivo</i> A combination of JQ1 and trametinib, but neither agent alone, induced significant regression of subcutaneous colorectal cancer xenografts.<b>Conclusions:</b> Our findings suggest that the MAPK pathway confers intrinsic resistance to BET inhibitors in colorectal cancer and propose an effective combination strategy for the treatment of colorectal cancer.<i></i>.
Dual Targeting of Bromodomain and Extraterminal Domain Proteins, and WNT or MAPK Signaling, Inhibits c-MYC Expression and Proliferation of Colorectal Cancer Cells.
In the promoter regions, 33 of the 160 analyzed WNT pathway genes were differentially methylated in colorectal cancer vs. normal, including hypermethylated AXIN2, CHP1, PRICKLE1, SFRP1, SFRP2, SOX17, and hypomethylated CACYBP, CTNNB1, MYC; 44 genes in adenoma vs. NAT; and 41 genes in colorectal cancer vs. adenoma comparisons.
Here, we identify MYC-repressed lncRNAs named MYCLo-4, -5 and -6 by comparing 3 categories of lncRNAs (downregulated in highly MYC-expressing colorectal cancer, up-regulated by MYC knockdown in HCT116, upregulated by MYC knockdown in RKO).