Abstract |
Nuclear factor-kappaB (NF-κB) is an important transcriptional factor and regulates a variety of pathophysiologic process involved in cell survival and death. This study aimed to assess the effects of NF-κB p65 subunit knockdown in suppression of nude mouse lung tumour cell xenografts and understands the underlying molecular events. A nude mouse Lewis lung carcinoma cell xenograft model was established, and the mice were intraperitoneally injected with NF-κB p65 small interfering RNA ( siRNA) and sacrificed after 2weeks of tumour cell injection. Tumour xenografts were harvested for terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay, Western blot and quantitative reverse transcription-polymerase chain reaction analyses. Results found that compared to the phosphate-buffered saline (PBS)-treated or the negative control (NC) siRNA-treated mice tumour xenograft weight and volume were significantly decreased in the NF-κB p65 siRNA-treated mice. The TUNEL positive (apoptosis) cells in xenograft sections were 45 ± 5 in PBS and 38 ± 3 in NC siRNA but increased to 271 ± 11 in p65 siRNA-treated mice. Compared to the PBS or the NC mice, levels of Bcl-2 mRNA and protein in tumour xenografts were significantly downregulated in p65 siRNA-treated mice. Knockdown of NF-κB p65 subunit expression can significantly inhibit the growth of nude mouse Lewis tumour cell xenografts by inducing tumour cell apoptosis and downregulating pro-apoptotic protein Bcl-2 expression. Targeting NF-κB p65 subunit expression as a potential therapeutic strategy needs further evaluation in treating human lung cancer.
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Authors | Yun Qu, Bo Qu, Xiaofang Wang, Rong Wu, Xiaoye Zhang |
Journal | Cell biochemistry and function
(Cell Biochem Funct)
Vol. 33
Issue 5
Pg. 320-5
(Jul 2015)
ISSN: 1099-0844 [Electronic] England |
PMID | 26178579
(Publication Type: Journal Article)
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Copyright | Copyright © 2015 John Wiley & Sons, Ltd. |
Chemical References |
- Bclaf1 protein, mouse
- RNA, Small Interfering
- Repressor Proteins
- Transcription Factor RelA
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Topics |
- Animals
- Apoptosis
(drug effects)
- Carcinoma, Lewis Lung
(genetics, pathology)
- Cell Line, Tumor
- Cell Proliferation
(drug effects)
- Gene Expression
(drug effects)
- Gene Knockdown Techniques
- Heterografts
- Lung Neoplasms
(genetics, pathology)
- Mice, Inbred C57BL
- Mice, Nude
- RNA, Small Interfering
(pharmacology)
- Repressor Proteins
(metabolism)
- Transcription Factor RelA
(genetics, metabolism)
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