1
|
Wang T, Yu N, Qian M, Feng J, Cao S, Yin J, Zhang Q. ERK-mediated autophagy promotes inactivated Sendai virus (HVJ-E)-induced apoptosis in HeLa cells in an Atg3-dependent manner. Cancer Cell Int 2018; 18:200. [PMID: 30534001 PMCID: PMC6280409 DOI: 10.1186/s12935-018-0692-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 11/27/2018] [Indexed: 12/23/2022] Open
Abstract
Background Apoptosis and autophagy are known to play important roles in cancer development. It has been reported that HVJ-E induces apoptosis in cancer cells, thereby inhibiting the development of tumors. To define the mechanism by which HVJ-E induces cell death, we examined whether HVJ-E activates autophagic and apoptotic signaling pathways in HeLa cells. Methods Cells were treated with chloroquine (CQ) and rapamycin to determine whether autophagy is involved in HVJ-E-induced apoptosis. Treatment with the ERK inhibitor, U0126, was used to determine whether autophagy and apoptosis are mediated by the ERK pathway. Activators of the PI3K/Akt/mTOR/p70S6K pathway, 740 Y-P and SC79, were used to characterize its role in HVJ-E-induced autophagy. siRNA against Atg3 was used to knock down the protein and determine whether it plays a role in HVJ-E-induced apoptosis in HeLa cells. Results We found that HVJ-E infection inhibited cell viability and induced apoptosis through the mitochondrial pathway, as evidenced by the expression of caspase proteins. This process was promoted by rapamycin treatment and inhibited by CQ treatment. HVJ-E-induced autophagy was further blocked by 740 Y-P, SC79, and U0126, indicating that both the ERK- and the PI3K/Akt/mTOR/p70S6K-pathways were involved. Finally, autophagy-mediated apoptosis induced by HVJ-E was inhibited by siRNA-mediated Atg3 knockdown. Conclusion In HeLa cells, HVJ-E infection triggered autophagy through the PI3K/Akt/mTOR/p70S6K pathway in an ERK1/2-dependent manner, and the induction of autophagy promoted apoptosis in an Atg3-dependent manner.
Collapse
Affiliation(s)
- Tao Wang
- 1Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University, 12 Wenhui East Road, Yangzhou, 225009 China.,2Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009 Jiangsu China
| | - Ning Yu
- 1Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University, 12 Wenhui East Road, Yangzhou, 225009 China.,2Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009 Jiangsu China
| | - Miao Qian
- 1Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University, 12 Wenhui East Road, Yangzhou, 225009 China.,2Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009 Jiangsu China.,4College of Medicine, Yangzhou University, Yangzhou, 225009 China
| | - Jie Feng
- Shanghai Laboratory Animal Research Center, Shanghai, 201203 China
| | - Shuyang Cao
- 1Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University, 12 Wenhui East Road, Yangzhou, 225009 China.,2Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009 Jiangsu China
| | - Jun Yin
- 1Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University, 12 Wenhui East Road, Yangzhou, 225009 China.,2Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009 Jiangsu China
| | - Quan Zhang
- 1Institute of Comparative Medicine, College of Veterinary Medicine, Yangzhou University, 12 Wenhui East Road, Yangzhou, 225009 China.,2Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009 Jiangsu China
| |
Collapse
|