| First Author | Husain K | Year | 2024 |
| Journal | Carcinogenesis | Volume | 45 |
| Issue | 12 | Pages | 881-892 |
| PubMed ID | 38877828 | Mgi Jnum | J:360097 |
| Mgi Id | MGI:7797688 | Doi | 10.1093/carcin/bgae041 |
| Citation | Husain K, et al. (2024) Effect of vitamin E delta-tocotrienol and aspirin on Wnt signaling in human colon cancer stem cells and in adenoma development in APCmin/+ mice. Carcinogenesis 45(12):881-892 |
| abstractText | In this study, we evaluated the effects of vitamin E delta-tocotrienol (DT3) and aspirin on Wnt signaling in human colon cancer stem cells (CCSCs) and in the prevention of adenoma formation in APCmin/+ mice. We found that knockdown of the adenomatous polyposis coli (APC) gene led to subsequent activation of Wnt signaling in colon epithelial cells (NCM460-APCsiRNA) and induction of beta-catenin and its downstream target proteins c-MYC, cyclin D1, and survivin. When aspirin and DT3 were combined, cell growth and survival were inhibited and apoptosis was induced in colon epithelial cells and CCSCs. However, DT3 and/or aspirin had little or no effect on the control of normal colon epithelial cells (NCM460-NCsiRNA). The induction of apoptosis was directly related to the activation of caspase 8 and cleavage of BH3-interacting-domain (BID) to truncated BID. In addition, DT3- and/or aspirin-induced apoptosis was associated with cleaved Poly (ADP-ribose) polymerase (PARP), elevated levels of cytosolic cytochrome c and BAX, and depletion of antiapoptotic protein BCl-2 in CCSCs. The combination of aspirin and DT3 inhibited the self-renewal capacity, Wnt/beta-catenin receptor activity, and expression of beta-catenin and its downstream targets c-MYC, cyclin D1, and survivin in CCSCs. We also found that treatment with DT3 alone or combined with aspirin significantly inhibited intestinal adenoma formation and Wnt/beta-catenin signaling and induced apoptosis, compared with vehicle, in APCmin/+ mice. Our study demonstrated a rationale for further investigation of the combination of DT3 and aspirin for colorectal cancer prevention and therapy. |
