Abstract | BACKGROUND: METHODS: Here, we first analyzed AURKA expression in 63 NSCLC tumor samples by immunohistochemistry (IHC) and used an MTS assay to compare cell survival by targeting AURKA with MLN8237 ( Alisertib) in H460 and HCC2429 (P53-competent), and H1299 (P53-deficient) cell lines. The radiosensitivity of MLN8237 was further evaluated by clonogenic assay. Finally, we examined the effect of combining radiation and AURKA inhibition in vivo with a xenograft model and explored the potential mechanism. RESULTS: We found that increased AURKA expression correlated with decreased time to progression and overall survival (p = 0.0447 and 0.0096, respectively). AURKA inhibition using 100 nM MLN8237 for 48 h decreases cell growth in a partially P53-dependent manner, and the survival rates of H460, HCC2429, and H1299 cells were 56, 50, and 77%, respectively. In addition, the survival of H1299 cells decreased 27% after ectopic restoration of P53 expression, and the radiotherapy enhancement was also influenced by P53 expression (DER H460 = 1.33; HCC2429 = 1.35; H1299 = 1.02). Furthermore, tumor growth of H460 was delayed significantly in a subcutaneous mouse model exposed to both MLN8237 and radiation. CONCLUSIONS: Taken together, our results confirmed that the expression of AURKA correlated with decreased NSCLC patient survival, and it might be a promising inhibition target when combined with radiotherapy, especially for P53-competent lung cancer cells. Modulation of P53 function could provide a new option for reversing cell resistance to the AURKA inhibitor MLN8237, which deserves further investigation.
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Authors | Ningbo Liu, Yong Antican Wang, Yunguang Sun, Jeffrey Ecsedy, Jifeng Sun, Xue Li, Ping Wang |
Journal | Respiratory research
(Respir Res)
Vol. 20
Issue 1
Pg. 230
(Oct 23 2019)
ISSN: 1465-993X [Electronic] England |
PMID | 31647033
(Publication Type: Journal Article)
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Chemical References |
- Azepines
- Biomarkers, Tumor
- MLN 8237
- Pyrimidines
- AURKA protein, human
- Aurora Kinase A
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Topics |
- Animals
- Aurora Kinase A
(antagonists & inhibitors, metabolism)
- Azepines
(pharmacology, therapeutic use)
- Biomarkers, Tumor
(metabolism)
- Carcinoma, Non-Small-Cell Lung
(drug therapy, enzymology, radiotherapy)
- Cell Line, Tumor
- Female
- Humans
- Lung Neoplasms
(drug therapy, enzymology, radiotherapy)
- Mice
- Mice, Nude
- Pyrimidines
(pharmacology, therapeutic use)
- Radiation Tolerance
(drug effects, physiology)
- Retrospective Studies
- Xenograft Model Antitumor Assays
(methods)
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