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Zeng X, Liu C, Fan J, Zou J, Guo M, Sun G. RNF138 Downregulates Antiviral Innate Immunity by Inhibiting IRF3 Activation. Int J Mol Sci 2023; 24:16110. [PMID: 38003298 PMCID: PMC10671598 DOI: 10.3390/ijms242216110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 10/31/2023] [Accepted: 11/01/2023] [Indexed: 11/26/2023] Open
Abstract
A viral infection activates the transcription factors IRF3 and NF-κB, which synergistically induces type I interferons (IFNs). Here, we identify the E3 ubiquitin ligase RNF138 as an important negative regulator of virus-triggered IRF3 activation and IFN-β induction. The overexpression of RNF138 inhibited the virus-induced activation of IRF3 and the transcription of the IFNB1 gene, whereas the knockout of RNF138 promoted the virus-induced activation of IRF3 and transcription of the IFNB1 gene. We further found that RNF138 promotes the ubiquitination of PTEN and subsequently inhibits PTEN interactions with IRF3, which is essential for the PTEN-mediated nuclear translocation of IRF3, thereby inhibiting IRF3 import into the nucleus. Our findings suggest that RNF138 negatively regulates virus-triggered signaling by inhibiting the interaction of PTEN with IRF3, and these data provide new insights into the molecular mechanisms of cellular antiviral responses.
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Affiliation(s)
- Xianhuang Zeng
- Taikang Medical School (School of Basic Medical Sciences), Wuhan University, Wuhan 430071, China
| | - Chaozhi Liu
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Jinhao Fan
- School of Ecology and Environment, Tibet University, Lhasa 850000, China
| | - Jiabin Zou
- Taikang Medical School (School of Basic Medical Sciences), Wuhan University, Wuhan 430071, China
| | - Mingxiong Guo
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan 430072, China
- School of Ecology and Environment, Tibet University, Lhasa 850000, China
| | - Guihong Sun
- Taikang Medical School (School of Basic Medical Sciences), Wuhan University, Wuhan 430071, China
- Hubei Provincial Key Laboratory of Allergy and Immunology, Wuhan 430071, China
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Liu J, Sun Y, Zeng X, Liu Y, Liu C, Zhou Y, Liu Y, Sun G, Guo M. Engineering and Characterization of an Artificial Drug-Carrying Vesicles Nanoplatform for Enhanced Specifically Targeted Therapy of Glioblastoma. Adv Mater 2023; 35:e2303660. [PMID: 37417769 DOI: 10.1002/adma.202303660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 07/04/2023] [Accepted: 07/06/2023] [Indexed: 07/08/2023]
Abstract
Glioblastoma multiforme (GBM) treatment is hindered by complex pathologies and the need to cross the blood-brain barrier (BBB) during drug delivery. Although exosomes have great potential for GBM treatment, these alone cannot fully meet the therapeutic requirements, owing to their limitations in targeting and delivery. Herein, engineered artificial vesicles (EAVs), ANG-TRP-PK1@EAVs, which are constructed using a liposome extruder from HEK293T cells expressing ANG-TRP-PK1 peptides, is developed. ANG-TRP-PK1 is a fusion peptide of Angiopep-2 fused to the N-terminus of TRP-PK1, to present Angiopep-2 on the EAVs. ANG-TRP-PK1@EAVs have similar characteristics to the secreted exosomes, but a much higher yield. ANG-TRP-PK1@EAVs have efficient BBB-penetration and GBM-targeting abilities in a mock BBB model in in vitro and orthotopic GBM mouse models in vivo. Doxorubicin loading EAVs (ANG-TRP-PK1@DOX) do not alter the characteristics of the EAVs, which can cross the BBB, reach the GBM, and kill tumor cells in orthotopic GBM mouse models. These engineered drug-loaded artificial vesicles show better therapeutic effects on GBM than temozolomide in mice, with very few side effects. In conclusion, EAVs can be inserted into different targeting ligands and packed into different drugs, and they may serve as unique and efficient nanoplatforms for drug delivery and tumor promise therapy.
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Affiliation(s)
- Jiaqi Liu
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, Hubei, 430072, P. R. China
| | - Yuting Sun
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, Hubei, 430072, P. R. China
| | - Xianhuang Zeng
- Taikang Medical School (School of Basic Medical Sciences), Wuhan University, Wuhan, Hubei, 430071, P. R. China
| | - Yang Liu
- Taikang Medical School (School of Basic Medical Sciences), Wuhan University, Wuhan, Hubei, 430071, P. R. China
| | - Chaozhi Liu
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, Hubei, 430072, P. R. China
| | - Ying Zhou
- Taikang Medical School (School of Basic Medical Sciences), Wuhan University, Wuhan, Hubei, 430071, P. R. China
| | - Yueguang Liu
- Neuregen therapeutics (Suzhou) Co. Ltd, Suzhou, Jiangsu, 215200, P. R. China
| | - Guihong Sun
- Taikang Medical School (School of Basic Medical Sciences), Wuhan University, Wuhan, Hubei, 430071, P. R. China
- Hubei Provincial Key Laboratory of Allergy and Immunology, Wuhan, Hubei, 430071, P. R. China
| | - Mingxiong Guo
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences, Wuhan University, Wuhan, Hubei, 430072, P. R. China
- School of Ecology and Environment, Tibet University, Lhasa, Tibet, 850000, P. R. China
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