Death-associated protein kinase 3 controls the tumor progression of A549 cells through ERK MAPK/c-Myc signaling
| Autor: | Koichi Sato, Satoru Kake, Tatsuya Usui, Hideyuki Yamawaki, Takashi Ohama |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
MAPK/ERK pathway Cancer Research Lung Neoplasms Adenocarcinoma of Lung Biology Adenocarcinoma Proto-Oncogene Proteins c-myc 03 medical and health sciences Gene Knockout Techniques 0302 clinical medicine Cell Movement Mice Inbred NOD Cell Line Tumor Animals Humans Phosphorylation Protein kinase A Extracellular Signal-Regulated MAP Kinases Protein kinase B Cell Proliferation A549 cell Cell growth Kinase General Medicine Cell Cycle Checkpoints Cell cycle Xenograft Model Antitumor Assays respiratory tract diseases Death-Associated Protein Kinases 030104 developmental biology Oncology Tumor progression 030220 oncology & carcinogenesis Cancer research Signal Transduction |
| Zdroj: | Oncology reports. 37(2) |
| ISSN: | 1791-2431 |
| Popis: | Death-associated protein kinases (DAPKs) are members of the serine/threonine protein kinase family, which regulate cell death. Although DAPK3 has been implicated as a tumor suppressor, a recent study revealed an oncogenic role of DAPK3. However, the role of DAPK3 in non-small cell lung cancer (NSCLC) remains unclear. Therefore, we examined whether DAPK3 controls the progression of NSCLC using the NSCLC cell line, A549. We generated A549 cells stably expressing small hairpin RNA (shRNA) targeting DAPK3. In the A549 cells, the protein level of DAPK3 was decreased and the cell proliferation was inhibited. DAPK3 knockdown caused G1/G0 cell cycle arrest as assessed by flow cytometric assay and reduced cyclin D1 expression in A549 cells. Phosphorylation of ERK and c-Myc, but not Akt and JNK, was inhibited by DAPK3 knockdown. Cell migration and invasion were also inhibited by DAPK3 knockdown as determined by a Boyden chamber assay and an invasion assay, respectively. Moreover, DAPK3 knockdown inhibited anchorage-independent cell growth as determined by soft-agar colony formation assay. In a mouse xenograft model, tumors derived from DAPK3-knockdown cells exhibited reduced tumor growth. The present results demonstrated for the first time that DAPK3 controls proliferation, migration, invasion, soft‑agar colony formation and tumor growth through activation of ERK/c-Myc signaling in A549 cells. These findings indicate that DAPK3 may be a novel target for the treatment of NSCLC. |
| Databáze: | OpenAIRE |
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