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Abstract Title:

Balsalazide Potentiates Parthenolide-Mediated Inhibition of Nuclear Factor-κB Signaling in HCT116 Human Colorectal Cancer Cells.

Abstract Source:

Intest Res. 2015 Jul ;13(3):233-41. Epub 2015 Jun 9. PMID: 26130998

Abstract Author(s):

Hyun-Young Kim, Se-Lim Kim, Young-Ran Park, Yu-Chuan Liu, Seung Young Seo, Seong Hun Kim, In Hee Kim, Seung Ok Lee, Soo Teik Lee, Sang Wook Kim

Article Affiliation:

Hyun-Young Kim

Abstract:

BACKGROUND/AIMS: Balsalazide is an anti-inflammatory drug used in the treatment of inflammatory bowel disease. Balsalazide can reduce inflammatory responses via several mechanisms, including inhibition of nuclear factor-κB (NF-κB) activity. Parthenolide (PT) inhibits NF-κB and exerts promising anticancer effects by promoting apoptosis. The present investigated the antitumor effects of balsalazide, combined with PT, on NF-κB in a representative human colorectal carcinoma cell line, HCT116.

METHODS: We counted cells and conducted annexin-V assays and cell cycle analysis to measure apoptotic cell death. Western blotting was used investigate the levels of proteins involved in apoptosis.

RESULTS: PT and balsalazide produced synergistic anti-proliferative effects and induced apoptotic cell death. The combination of balsalazide and PT markedly suppressed nuclear translocation of the NF-κB p65 subunit and the phosphorylation of inhibitor of NF-κB. Moreover, PT and balsalazide dramatically enhanced NF-κB p65 phosphorylation. Apoptosis, through the mitochondrial pathway, was confirmed by detecting effects on Bcl-2 family members, cytochrome c release, and activation of caspase-3 and -8.

CONCLUSIONS: Combination treatment with PT and balsalazide may offer an effective strategy for the induction of apoptosis in HCT116 cells.

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