| Autor: |
Duc-Hiep Bach, Donghwa Kim, Song Yi Bae, Won Kyung Kim, Ji-Young Hong, Hye-Jung Lee, Nirmal Rajasekaran, Soonbum Kwon, Yanhua Fan, Thi-Thu-Trang Luu, Young Kee Shin, Jeeyeon Lee, Sang Kook Lee |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Molecular Therapy: Nucleic Acids, Vol 11, Iss C, Pp 455-467 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
2162-2531 |
| DOI: |
10.1016/j.omtn.2018.03.011 |
| Popis: |
Epidermal growth factor receptor tyrosine kinase inhibitors (EGFR-TKIs) are used clinically as target therapies for lung cancer patients, but the occurrence of acquired drug resistance limits their efficacy. Nicotinamide N-methyltransferase (NNMT), a cancer-associated metabolic enzyme, is commonly overexpressed in various human tumors. Emerging evidence also suggests a crucial loss of function of microRNAs (miRNAs) in modulating tumor progression in response to standard therapies. However, their precise roles in regulating the development of drug-resistant tumorigenesis are still poorly understood. Herein, we established EGFR-TKI-resistant non-small-cell lung cancer (NSCLC) models and observed a negative correlation between the expression levels of NNMT and miR-449a in tumor cells. Additionally, knockdown of NNMT suppressed p-Akt and tumorigenesis, while re-expression of miR-449a induced phosphatase and tensin homolog (PTEN), and inhibited tumor growth. Furthermore, yuanhuadine, an antitumor agent, significantly upregulated miR-449a levels while critically suppressing NNMT expression. These findings suggest a novel therapeutic approach for overcoming EGFR-TKI resistance to NSCLC treatment. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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