Dengue nonstructural protein 1 maintains autophagy through retarding caspase-mediated cleavage of beclin-1

Zi Yi Lu, Miao Huei Cheng, Chia Yi Yu, Yee Shin Lin, Trai Ming Yeh, Chia Ling Chen, Chien Chin Chen, Shu Wen Wan, Chih Peng Chang

研究成果: 雜誌貢獻文章同行評審

3 引文 斯高帕斯(Scopus)

摘要

Dengue virus (DENV) infection is a significant public health threat in tropical and subtropical regions; however, there is no specific antiviral drug. Accumulated studies have revealed that DENV infection induces several cellular responses, including autophagy and apoptosis. The crosstalk between autophagy and apoptosis is associated with the interactions among components of these two pathways, such as apoptotic caspase-mediated cleavage of autophagy-related proteins. Here, we show that DENV-induced autophagy inhibits early cell apoptosis and hence enhances DENV replication. Later, the apoptotic activities are elevated to suppress autophagy through cleavage of Beclin-1, an essential autophagy-related protein. Inhibition of cleavage of Beclin-1 by a pan-caspase inhibitor, Z-VAD, increases both autophagy and viral replication. Regarding the mechanism, we further found that DENV nonstructural protein 1 (NS1) is able to interact with Beclin-1 during DENV infection. The interaction between Beclin-1 and NS1 attenuates Beclin-1 cleavage and facilitates autophagy to prevent cell apoptosis. Our study suggests a novel mechanism whereby NS1 preserves Beclin-1 for maintaining autophagy to antagonize early cell apoptosis; however, elevated caspases trigger apoptosis by degrading Beclin-1 in the late stage of infection. These findings suggest implications for anti-DENV drug design.
原文英語
文章編號9702
頁(從 - 到)1-19
頁數19
期刊International journal of molecular sciences
21
發行號24
DOIs
出版狀態已發佈 - 十二月 2 2020

ASJC Scopus subject areas

  • 催化
  • 分子生物學
  • 光譜
  • 電腦科學應用
  • 物理與理論化學
  • 有機化學
  • 無機化學

指紋

深入研究「Dengue nonstructural protein 1 maintains autophagy through retarding caspase-mediated cleavage of beclin-1」主題。共同形成了獨特的指紋。

引用此