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Zhang J, Han L, Ma Q, Wang X, Yu J, Xu Y, Zhang X, Wu X, Deng G. RIP3 impedes Mycobacterium tuberculosis survival and promotes p62-mediated autophagy. Int Immunopharmacol 2023; 115:109696. [PMID: 36638666 DOI: 10.1016/j.intimp.2023.109696] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 12/18/2022] [Accepted: 01/03/2023] [Indexed: 01/13/2023]
Abstract
Macrophage is believed to play a vital role in the fight against Mycobacterium tuberculosis (M.tb) infection by activating autophagy. Recently, receptor-interacting protein kinase-3 (RIP3), an essential kinase for necroptotic cell death signaling, has been demonstrated to be involved in autophagy. However, RIP3's role in fighting against M.tb infection remains elusive. Here we show that a substantial increase in inflammatory cell infiltration and higher bacterial burden are observed in the lungs of RIP3-/- mice with Mycobacterium bovis Bacillus Calmette-Guerin (BCG) infection. Meanwhile, RIP3 ameliorates lung injury and promote autophagy via induce autophagosome and autophagolysosome formation which indicate that RIP3 is indispensable for host clearance of BCG via autophagy. Mechanically, RIP3 enhances p62 binding to ubiquitylated proteins and LC3 by interacting with p62, and RHIM domain is required for RIP3-p62 interaction. Hence, our results conclusively show that RIP3 impedes M.tb survival and promotes p62-mediated autophagy. The findings provide further insight into understanding the mechanism of M.tb immune escape and pathogenesis of tuberculosis.
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Affiliation(s)
- Jiamei Zhang
- Key Lab of Ministry of Education for Protection and Utilization of Special Biological Resources in Western China, Ningxia University, Yinchuan, NingXia 750021, China; School of Life Science, NingXia University, Yinchuan, NingXia 750021, China
| | - Lu Han
- Key Lab of Ministry of Education for Protection and Utilization of Special Biological Resources in Western China, Ningxia University, Yinchuan, NingXia 750021, China; School of Life Science, NingXia University, Yinchuan, NingXia 750021, China
| | - Qinmei Ma
- Key Lab of Ministry of Education for Protection and Utilization of Special Biological Resources in Western China, Ningxia University, Yinchuan, NingXia 750021, China; School of Life Science, NingXia University, Yinchuan, NingXia 750021, China
| | - Xiaoping Wang
- Tuberculosis Reference Laboratory, Ningxia Institute for Tuberculosis Control, The Fourth People's Hospital of Ningxia Hui Autonomous Region, Yinchuan, Ningxia 750021, China
| | - Jialin Yu
- Key Lab of Ministry of Education for Protection and Utilization of Special Biological Resources in Western China, Ningxia University, Yinchuan, NingXia 750021, China; School of Life Science, NingXia University, Yinchuan, NingXia 750021, China
| | - Yanan Xu
- Key Lab of Ministry of Education for Protection and Utilization of Special Biological Resources in Western China, Ningxia University, Yinchuan, NingXia 750021, China; School of Life Science, NingXia University, Yinchuan, NingXia 750021, China
| | - Xu Zhang
- Institute of Medical Sciences, General Hospital of Ningxia Medical University, Yinchuan, Ningxia 750004, China
| | - Xiaoling Wu
- Key Lab of Ministry of Education for Protection and Utilization of Special Biological Resources in Western China, Ningxia University, Yinchuan, NingXia 750021, China; School of Life Science, NingXia University, Yinchuan, NingXia 750021, China.
| | - Guangcun Deng
- Key Lab of Ministry of Education for Protection and Utilization of Special Biological Resources in Western China, Ningxia University, Yinchuan, NingXia 750021, China; School of Life Science, NingXia University, Yinchuan, NingXia 750021, China.
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Sun Y, Zheng Q, Wang Y, Pang Z, Liu J, Yin Z, Lou Z. Activity-Based Protein Profiling Identifies ATG4B as a Key Host Factor for Enterovirus 71 Proliferation. J Virol 2019; 93:e01092-19. [PMID: 31554687 PMCID: PMC6880168 DOI: 10.1128/jvi.01092-19] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 09/18/2019] [Indexed: 01/11/2023] Open
Abstract
Virus-encoded proteases play diverse roles in the efficient replication of enterovirus 71 (EV71), which is the causative agent of human hand, foot, and mouth disease (HFMD). However, it is unclear how host proteases affect viral proliferation. Here, we designed activity-based probes (ABPs) based on an inhibitor of the main EV71 protease (3Cpro), which is responsible for the hydrolysis of the EV71 polyprotein, and successfully identified host candidates that bind to the ABPs. Among the candidates, the host cysteine protease autophagy-related protein 4 homolog B (ATG4B), a key component of the autophagy machinery, was demonstrated to hydrolytically process the substrate of EV71 3Cpro and had activity comparable to that of the viral protease. Genetic disruption of ATG4B confirmed that the enzyme is indispensable for viral proliferation in vivo Our results not only further the understanding of host-virus interactions in EV71 biology but also provide a sample for the usage of activity-based proteomics to reveal host-pathogen interactions.IMPORTANCE Enterovirus 71 (EV71), one of the major pathogens of human HFMD, has caused outbreaks worldwide. How EV71 efficiently assesses its life cycle with elaborate interactions with multiple host factors remains to be elucidated. In this work, we deconvoluted that the host ATG4B protein processes the viral polyprotein with its cysteine protease activity and helps EV71 replicate through a chemical biology strategy. Our results not only further the understanding of the EV71 life cycle but also provide a sample for the usage of activity-based proteomics to reveal host-pathogen interactions.
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Affiliation(s)
- Yang Sun
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Qizhen Zheng
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Yaxin Wang
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
- School of Life Science, Tianjin University, Tianjin, China
| | - Zhengyuan Pang
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, California, USA
| | - Jingwei Liu
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Zheng Yin
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing, China
| | - Zhiyong Lou
- Collaborative Innovation Center of Biotherapy, School of Medicine, Tsinghua University, Beijing, China
- MOE Key Laboratory of Protein Science, School of Medicine, Tsinghua University, Beijing, China
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Pan H, Zhong XP, Lee S. Sustained activation of mTORC1 in macrophages increases AMPKα-dependent autophagy to maintain cellular homeostasis. BMC BIOCHEMISTRY 2016; 17:14. [PMID: 27387347 PMCID: PMC4937593 DOI: 10.1186/s12858-016-0069-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 06/29/2016] [Indexed: 12/25/2022]
Abstract
Background The mechanistic target of rapamycin complex 1 (mTORC1) is a well-conserved serine/threonine protein kinase that controls autophagy as well as many other processes such as protein synthesis, cell growth, and metabolism. The activity of mTORC1 is stringently and negatively controlled by the tuberous sclerosis proteins 1 and 2 complex (TSC1/2). Results In contrast to the previous studies using Tsc1 knockout mouse embryonic fibroblasts (MEF) cells, we demonstrated evidence that TSC1 deficient macrophages exhibited enhanced basal and mycobacterial infection-induced autophagy via AMPKα-dependent phosphorylation of ULK1 (Ser555). These effects were concomitant with constitutive activation of mTORC1 and can be reversed by addition of amino acids or rapamycin, and by the knockdown of the regulatory-associated protein of mTOR, Raptor. In addition, increased autophagy in TSC1 deficient macrophages resulted in suppression of inflammation during mycobacterial infection, which was reversed upon amino acid treatment of the TSC1 deficient macrophages. We further demonstrated that TSC1 conditional knockout mice infected with Mycobacterium tuberculosis, the causative agent of tuberculosis, resulted in less bacterial burden and a comparable level of inflammation when compared to wild type mice. Conclusions Our data revealed that sustained activation of mTORC1 due to defects in TSC1 promotes AMPKα-dependent autophagic flux to maintain cellular homeostasis.
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Affiliation(s)
- Hongjie Pan
- Human Vaccine Institute and Department of Medicine, Duke University, Durham, NC, 27710, USA
| | - Xiao-Ping Zhong
- Department of Pediatrics-Allergy and Immunology, Duke University Medical Center, Durham, NC, 27710, USA
| | - Sunhee Lee
- Human Vaccine Institute and Department of Medicine, Duke University, Durham, NC, 27710, USA.
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