1. Academic Validation
  2. Modulatory effects of curcumin on Singapore grouper iridovirus infection-associated apoptosis and autophagy in vitro

Modulatory effects of curcumin on Singapore grouper iridovirus infection-associated apoptosis and autophagy in vitro

  • Fish Shellfish Immunol. 2022 Oct 4;131:84-94. doi: 10.1016/j.fsi.2022.09.074.
Yuexuan Wang 1 Suifeng Xu 1 Chengzong Han 1 Youhua Huang 1 Jingguang Wei 1 Shina Wei 2 Qiwei Qin 3
Affiliations

Affiliations

  • 1 College of Marine Sciences, South China Agricultural University, Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China.
  • 2 College of Marine Sciences, South China Agricultural University, Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China. Electronic address: [email protected].
  • 3 College of Marine Sciences, South China Agricultural University, Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, 510642, China; Southern Marine Science and Engineering Guangdong Laboratory, Zhuhai, 528478, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266000, China. Electronic address: [email protected].
Abstract

Singapore grouper iridovirus (SGIV) with high pathogenicity can cause great economic losses to aquaculture industry. Thus, it is of urgency to find effective Antiviral strategies to combat SGIV. Curcumin has been demonstrated effective Antiviral activity on SGIV Infection. However, the molecular mechanism behind this action needs to be further explanations. In view of the fact that Apoptosis (type I programmed cell death) and Autophagy (type II programmed cell death) were key regulators during SGIV Infection, we aimed to investigate the relevance between Antiviral activity of curcumin and SGIV-associated programmed and clarify the role of potential signaling pathways. Our results showed that curcumin suppressed SGIV-induced Apoptosis. At the same time, the activities of Caspase-3/8/9 and activating protein-1 (AP-1), P53, nuclear factor-κB (NF-κB) promoters were inhibited. Besides, the activation of extracellular regulated protein kinases (ERK), c-Jun N-terminal kinase (JNK) and p38 mitogen activate protein kinase (p38 MAPK) signal pathways were suppressed in curcumin-treated cells. On the other hand, curcumin down-regulated protein kinase B (Akt)/mammalian target of rapamycin (mTOR) signaling pathway to promote Autophagy representing by increased LC3 II and Beclin1 expression. Curcumin also hindered the transition of cells from G1 to S phase, as well as down-regulating the expression of CyclinD1. Our findings revealed the resistance curcumin induced to the effects of DNA virus on cell Apoptosis and Autophagy and the insights gained from this study may be of assistance to understand the molecular mechanism of curcumin against DNA virus Infection.

Keywords

Apoptosis; Autophagy; Curcumin; Singapore grouper iridovirus (SGIV).

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