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Ma J, Jiang X, Yarui A, Danli J, Xiaodie Y, Zhang J, Xu A. Ultraviolet light activates PMK-1/p38 MAPK signaling via MOM-4 and JKK-1 in Caenorhabditis elegans. Toxicol Res (Camb) 2020; 9:461-466. [PMID: 32905206 DOI: 10.1093/toxres/tfaa041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/22/2020] [Accepted: 05/26/2020] [Indexed: 11/12/2022] Open
Abstract
P38 mitogen-activated protein kinase (p38 MAPK) plays an important role in innate immunity and is activated by ultraviolet (UV) radiation. However, the molecular mechanism underlying UV stress remains unclear. In this study, we reported that UV activated PMK-1/p38 MAPK signaling via JKK-1 and MOM-4 in Caenorhabditis elegans. In C. elegans, different UV radiation doses resulted in PMK-1 phosphorylation. However, pmk-1 mutants failed to demonstrate an altered survival time in response to UV when compared with wild-type worms. Further analysis showed that JKK-1, but not SEK-1 mutants, displayed impaired PMK-1 activation following UV irradiation, suggesting that JKK-1 is the upstream MAP2K for the activation of PMK-1 in C. elegans under UV stimulation. UV-induced activation of PMK-1 was markedly reduced in MOM-4, but not in NSY-1 and DLK-1 mutant worms, suggesting that MOM-4 is the upstream MAP3K regulator of PMK-1 activation in response to UV stress in C. elegans. Additionally, daf-16 mutants displayed a shorter lifespan under UV stress, but UV-induced activation of PMK-1 was not markedly reduced in daf-16 and age-1 mutant worms. Our results revealed the signaling pathway involved in PMK-1 activation in C. elegans in response to UV radiation.
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Affiliation(s)
- Jing Ma
- Department of Pharmacy, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, 1665 Kongjiang Road, Shanghai 200092, China
| | - Xinghao Jiang
- School of Information Security Engineering, Shanghai JiaoTong University, 800 Jianchuan Road, Shanghai 200240, China
| | - An Yarui
- College of Science, University of Shanghai for Science and Technology, 1100 Jungong Road, Shanghai 200093, China
| | - Jin Danli
- College of Science, University of Shanghai for Science and Technology, 1100 Jungong Road, Shanghai 200093, China
| | - Yin Xiaodie
- College of Science, University of Shanghai for Science and Technology, 1100 Jungong Road, Shanghai 200093, China
| | - Jian Zhang
- Department of Pharmacy, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, 1665 Kongjiang Road, Shanghai 200092, China
| | - Ajing Xu
- Department of Pharmacy, Xinhua Hospital, School of Medicine, Shanghai Jiaotong University, 1665 Kongjiang Road, Shanghai 200092, China
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