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Article

Double inhibition of NF-κB and XIAP via RNAi enhances the sensitivity of pancreatic cancer cells to gemcitabine

  • Authors:
    • Li-Ping Cao
    • Jian-Lin Song
    • Xiao-Ping Yi
    • Yi-Xiong Li
  • View Affiliations / Copyright

    Affiliations: Department of General Surgery, Xiangya Hospital, Central South University, Hunan 410008, P.R. China, Department of Radiology, Xiangya Hospital, Central South University, Hunan 410008, P.R. China
  • Pages: 1659-1665
    |
    Published online on: January 23, 2013
       https://doi.org/10.3892/or.2013.2246
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Abstract

The majority of patients with pancreatic cancer are resistant to gemcitabine. One of the mechanisms involved is the anti-apoptotic ability of these cells. The median lethal dose (LD50) of gemcitabine for PANC-1 cells was higher than that for Mia PaCa-2 cells and the former had higher nuclear factor-κB (NF-κB) and X-linked inhibitor of apoptosis protein (XIAP) levels. NF-κB contributes to the inhibition of apoptosis by the downregulation of downstream genes, such as XIAP and Bcl-2 and it confers chemoresistance. The two cell lines were infected with NF-κB p65 small interfering RNA (siRNA). p65 protein was effectively downregulated accompanied by the downregulation of XIAP protein. The combination treatment with gemcitabine and p65 siRNA increased the apoptotic rates in both cell lines; however, this was not sufficient. XIAP is involved in apoptosis to a greater extent compated to Bcl-2. XIAP may serve as another factor affecting the sufficiency of chemotherapy. XIAP siRNA was designed to knockdown XIAP. Mia PaCa-2 and PANC-1 cells were co-infected with XIAP siRNA and p65 siRNA. XIAP and p65 proteins were effectively downregulated and the gemcitabine-induced apoptotic rates were significantly increased. These results suggest that XIAP and NF-κB are two important factors conferring the chemoresistance of pancreatic cancer cells, and that their downregulation via RNAi effectively enhances the chemosensitivity of pancreatic cancer cells to gemcitabine.
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Copy and paste a formatted citation
Spandidos Publications style
Cao L, Song J, Yi X and Li Y: Double inhibition of NF-κB and XIAP via RNAi enhances the sensitivity of pancreatic cancer cells to gemcitabine. Oncol Rep 29: 1659-1665, 2013.
APA
Cao, L., Song, J., Yi, X., & Li, Y. (2013). Double inhibition of NF-κB and XIAP via RNAi enhances the sensitivity of pancreatic cancer cells to gemcitabine. Oncology Reports, 29, 1659-1665. https://doi.org/10.3892/or.2013.2246
MLA
Cao, L., Song, J., Yi, X., Li, Y."Double inhibition of NF-κB and XIAP via RNAi enhances the sensitivity of pancreatic cancer cells to gemcitabine". Oncology Reports 29.4 (2013): 1659-1665.
Chicago
Cao, L., Song, J., Yi, X., Li, Y."Double inhibition of NF-κB and XIAP via RNAi enhances the sensitivity of pancreatic cancer cells to gemcitabine". Oncology Reports 29, no. 4 (2013): 1659-1665. https://doi.org/10.3892/or.2013.2246
Copy and paste a formatted citation
x
Spandidos Publications style
Cao L, Song J, Yi X and Li Y: Double inhibition of NF-κB and XIAP via RNAi enhances the sensitivity of pancreatic cancer cells to gemcitabine. Oncol Rep 29: 1659-1665, 2013.
APA
Cao, L., Song, J., Yi, X., & Li, Y. (2013). Double inhibition of NF-κB and XIAP via RNAi enhances the sensitivity of pancreatic cancer cells to gemcitabine. Oncology Reports, 29, 1659-1665. https://doi.org/10.3892/or.2013.2246
MLA
Cao, L., Song, J., Yi, X., Li, Y."Double inhibition of NF-κB and XIAP via RNAi enhances the sensitivity of pancreatic cancer cells to gemcitabine". Oncology Reports 29.4 (2013): 1659-1665.
Chicago
Cao, L., Song, J., Yi, X., Li, Y."Double inhibition of NF-κB and XIAP via RNAi enhances the sensitivity of pancreatic cancer cells to gemcitabine". Oncology Reports 29, no. 4 (2013): 1659-1665. https://doi.org/10.3892/or.2013.2246
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