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Zhang XZ, Wang J, Tian WJ, You JL, Chi XJ, Wang XJ. Phospho-eIF4E stimulation regulates coronavirus entry by selective expression of cell membrane-residential factors. J Virol 2024; 98:e0194823. [PMID: 38299843 PMCID: PMC10878034 DOI: 10.1128/jvi.01948-23] [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: 12/14/2023] [Accepted: 12/31/2023] [Indexed: 02/02/2024] Open
Abstract
The eukaryotic translation initiation factor eIF4E can regulate cellular translation via phosphorylation on serine 209. In a recent study, by two rounds of TMT relative quantitative proteomics, we found that phosphorylated eIF4E (p-eIF4E) favors the translation of selected mRNAs, and the encoded proteins are mainly involved in ECM-receptor, focal adhesion, and PI3K-Akt signaling. The current paper is focused on the relationship between p-eIF4E and the downstream host cell proteins, and their presumed effect on efficient entry of PEDV. We found that the depletion of membrane-residential factor TSPAN3, CD63, and ITGB2 significantly inhibited viral invasion of PEDV, and reduced the entry of pseudotyped particles PEDV-pp, SARS-CoV-pp, and SARS-CoV-2-pp. The specific antibodies of TSPAN3, CD63, and ITGB2 blocked the adsorption of PEDV into host cells. Moreover, we detected that eIF4E phosphorylation was increased at 1 h after PEDV infection, in accordance with the expression of TSPAN3, CD63, and ITGB2. Similar trends appeared in the intestines of piglets in the early stage of PEDV challenge. Compared with Vero cells, S209A-Vero cells in which eIF4E cannot be phosphorylated showed a decrease of invading PEDV virions. MNK kinase inhibitor blocked PEDV invasion, as well as reduced the accumulation of TSPAN3, CD63, and ITGB2. Further study showed that the ERK-MNK pathway was responsible for the regulation of PEDV-induced early phosphorylation of eIF4E. This paper demonstrates for the first time the connections among p-eIF4E stimulation and membrane-residential host factors. Our findings also enrich the understanding of the biological function of phosphorylated eIF4E during the viral life cycle.IMPORTANCEThe eukaryotic translation initiation factor eIF4E can regulate cellular translation via phosphorylation. In our previous study, several host factors susceptible to a high level of p-eIF4E were found to be conducive to viral infection by coronavirus PEDV. The current paper is focused on cell membrane-residential factors, which are involved in signal pathways that are sensitive to phosphorylated eIF4E. We found that the ERK-MNK pathway was activated, which resulted in the stimulation of phosphorylation of eIF4E in early PEDV infection. Phospho-eIF4E promoted the viral invasion of PEDV by upregulating the expression of host factors TSPAN3, CD63, and ITGB2 at the translation level rather than at the transcription level. Moreover, TSPAN3, CD63, or ITGB2 facilitates the efficient entry of coronavirus SARS-CoV, SARS-CoV-2, and HCoV-OC43. Our findings broaden our insights into the dynamic phosphorylation of eIF4E during the viral life cycle, and provide further evidence that phosphorylated eIF4E regulates selective translation of host mRNA.
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Affiliation(s)
- Xiu-Zhong Zhang
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Jing Wang
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Wen-Jun Tian
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Jing-Ling You
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Xiao-Jing Chi
- NHC Key Laboratory of Systems Biology of Pathogens, Institute of Pathogen Biology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Xiao-Jia Wang
- National Key Laboratory of Veterinary Public Health and Safety, College of Veterinary Medicine, China Agricultural University, Beijing, China
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Hu J, Guan X, Zhao M, Xie P, Guo J, Tan J. Genome-wide CRISPR-Cas9 Knockout Screening Reveals a TSPAN3-mediated Endo-lysosome Pathway Regulating the Degradation of α-Synuclein Oligomers. Mol Neurobiol 2023; 60:6731-6747. [PMID: 37477766 DOI: 10.1007/s12035-023-03495-5] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Accepted: 07/09/2023] [Indexed: 07/22/2023]
Abstract
Misfolding and aggregation of α-Synuclein (α-Syn), which are hallmark pathological features of neurodegenerative diseases such as Parkinson's disease (PD) and dementia with Lewy Bodies, continue to be significant areas of research. Among the diverse forms of α-Syn - monomer, oligomer, and fibril, the oligomer is considered the most toxic. However, the mechanisms governing α-Syn oligomerization are not yet fully understood. In this study, we utilized genome-wide CRISPR/Cas9 loss-of-function screening in human HEK293 cells to identify negative regulators of α-Syn oligomerization. We found that tetraspanin 3 (TSPAN3), a presumptive four-pass transmembrane protein, but not its homolog TSPAN7, significantly modulates α-Syn oligomer levels. TSPAN3 was observed to interact with α-Syn oligomers, regulate the amount of α-Syn oligomers on the cell membrane, and promote their degradation via the clathrin-AP2 mediated endo-lysosome pathway. Our findings highlight TSPAN3 as a potential regulator of α-Syn oligomers, presenting a promising target for future PD prevention and treatment strategies.
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Affiliation(s)
- JunJian Hu
- Center for Medical Genetics and Hunan Key Laboratory of Medical Genetics, School of Life Science, Central South University, Changsha, 410078, Hunan, China
- Department of Central Laboratory, SSL Central Hospital of Dongguan City, Affiliated Dongguan Shilong People's Hospital of Southern Medical University, Dongguan, China
| | - Xinjie Guan
- Center for Medical Genetics and Hunan Key Laboratory of Medical Genetics, School of Life Science, Central South University, Changsha, 410078, Hunan, China
- Mr. & Mrs. Ko Chi-Ming Centre for Parkinson's Disease Research, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong, SAR, China
- Institute for Research and Continuing Education, Hong Kong Baptist University, Shenzhen, China
| | - Miao Zhao
- Center for Medical Genetics and Hunan Key Laboratory of Medical Genetics, School of Life Science, Central South University, Changsha, 410078, Hunan, China
| | - Pengqing Xie
- Center for Medical Genetics and Hunan Key Laboratory of Medical Genetics, School of Life Science, Central South University, Changsha, 410078, Hunan, China
| | - Jifeng Guo
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
| | - Jieqiong Tan
- Center for Medical Genetics and Hunan Key Laboratory of Medical Genetics, School of Life Science, Central South University, Changsha, 410078, Hunan, China.
- Hunan Key Laboratory of Animal Models for Human Diseases, School of Life Sciences, Central South University, Changsha, Hunan, China.
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Wu X, Zhou S, Wang L, Ma J, Zhou Y, Ruan Y, Shao H, Zhou X, Li H. Circ_103809 Aggravates the Malignant Phenotype of Pancreatic Cancer Through Modulating miR-197-3p/ TSPAN3 Axis. Mol Biotechnol 2023:10.1007/s12033-023-00874-0. [PMID: 37740818 DOI: 10.1007/s12033-023-00874-0] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 08/28/2023] [Indexed: 09/25/2023]
Abstract
Pancreatic cancer (PC) is a malignant tumor with insidious clinical manifestations and dismal prognosis. Emerging reports have demonstrated that circRNAs exert pivotal biological function in PC. Here, we investigated the crucial biological role and underlying regulatory mechanisms of differentially expressed circ_103809 in PC. In this study, hsa_circ_103809 (hsa_circ_0072088) was identified as the research object via analyzing and screening the aberrantly expressed circRNAs in PC by GSE69362 dataset. The levels of circ_103809 in PC tissues and cells were assessed via qRT-PCR. Functional assays were conducted to monitor the impacts of circ_103809 on PC cells. Additionally, the downstream molecular targets and regulatory networks of circ_103809 were predicted by bioinformatics and validated using luciferase assays and rescue experiments. We found that circ_103809 was substantially upregulated in PC tissues and cells. Silencing circ_103809 restrained the growth viability, clonogenic rate, migration, and invasion capabilities of PC cells. Further mechanistic exploration disclosed that miR-197-3p was the downstream gene of circ_103809, while Tetraspanin-3 (TSPAN3) was a direct target of miR-197-3p. The suppressive effect of circ_103809 knockdown on malignant processes of PC cells was eliminated by miR-197-3p downregulation or TSPAN3 upregulation. Our study demonstrated that circ_103809 served as an innovative positive regulator in the growth and metastasis of PC cells. Furthermore, circ_103809 mediated the miR-197-3p/TSPAN3 axis to modulate the malignant progression of PC cells, which was prospected to be a probable biomarker and an efficient therapeutic target for PC.
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Affiliation(s)
- Xiang Wu
- Department of Hepatobiliary and Pancreatic Surgery, Ningbo Medical Center Li Huili Hospital, No.1111 Jiangnan Road, Yinzhou District, Ningbo, 315000, Zhejiang, China
- Health Science Center, Ningbo University, Ningbo, 315000, Zhejiang, China
| | - Shuping Zhou
- Ningbo College of Health Sciences, Ningbo, 315000, Zhejiang, China
| | - Luoluo Wang
- Department of Hepatobiliary and Pancreatic Surgery, Ningbo Medical Center Li Huili Hospital, No.1111 Jiangnan Road, Yinzhou District, Ningbo, 315000, Zhejiang, China
| | - Jingyun Ma
- Department of Hepatobiliary and Pancreatic Surgery, Ningbo Medical Center Li Huili Hospital, No.1111 Jiangnan Road, Yinzhou District, Ningbo, 315000, Zhejiang, China
| | - Yang Zhou
- Ningbo Institute of Innovation for Combined Medicine and Engineering, The Affiliated Li Huili Hospital, Ningbo University, Ningbo, 315100, Zhejiang, China
| | - Yi Ruan
- Department of Hepatobiliary and Pancreatic Surgery, Ningbo Medical Center Li Huili Hospital, No.1111 Jiangnan Road, Yinzhou District, Ningbo, 315000, Zhejiang, China
| | - Hanjie Shao
- Health Science Center, Ningbo University, Ningbo, 315000, Zhejiang, China
| | - Xinhua Zhou
- Department of Hepatobiliary and Pancreatic Surgery, Ningbo Medical Center Li Huili Hospital, No.1111 Jiangnan Road, Yinzhou District, Ningbo, 315000, Zhejiang, China.
| | - Hong Li
- Department of Hepatobiliary and Pancreatic Surgery, Ningbo Medical Center Li Huili Hospital, No.1111 Jiangnan Road, Yinzhou District, Ningbo, 315000, Zhejiang, China.
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Lei W, Lin J, Liu F, Chen N. Long noncoding RNA GAS6 antisense RNA1 silencing attenuates the tumorigenesis of acute myeloid leukemia cells through targeting microRNA-370-3p/Tetraspanin3 axis. Clin Hemorheol Microcirc 2021; 78:69-81. [PMID: 33523043 DOI: 10.3233/ch-201039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
PURPOSE Acute myeloid leukemia (AML) is a type of hematologic malignancy. This study was attempt to explore the effect of long noncoding RNA GAS6 antisense RNA1 (GAS6-AS1) on pediatric AML and the regulation mechanisms. METHODS GAS6-AS1, microRNA-370-3p (miR-370-3p), and Tetraspanin3 (TSPAN3) expression in bone marrow (BM) tissues and cells was determined by qRT-PCR. The correlation between GAS6-AS1 and clinicopathological features of pediatric patients with AML was assessed. In vitro, viability and migration and invasion of AML cells were evaluated via MTT and transwell assays, respectively. Interactions among GAS6-AS1, miR-370-3p, and TSPAN3 were revealed by dual-luciferase reporter assays. Western blot was applied to confirm the protein expression of TSPAN3. RESULTS GAS6-AS1 and TSPAN3 expression was elevated in BM tissues of pediatric patients with AML and AML cells, but miR-370-3p expression was reduced. GAS6-AS1 expression was positively related to French-American-British (FAB) classification in pediatric patients with AML. In vitro, GAS6-AS1 deficiency restrained the viability, migration, and invasion of AML cells. Additionally, GAS6-AS1 mediated miR-370-3p expression indeed and TSPAN3 was identified as a target of miR-370-3p. Furthermore, miR-370-3p overexpression repressed the protein expression of TSPAN3. The feedback experiments demonstrated that miR-370-3p inhibition or TSPAN3 overexpression mitigated the suppressive effect of sh-GAS6-AS1 on the tumorigenesis of AML cells. CONCLUSION GAS6-AS1 silencing restrained AML cell viability, migration, and invasion by targeting miR-370-3p/TSPAN3 axis, affording a novel therapeutic target for pediatric AML.
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Affiliation(s)
- Weijuan Lei
- Department of Pediatrics, Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang, Hubei, China
| | - Juanjuan Lin
- Department of Pediatrics, Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang, Hubei, China
| | - Fang Liu
- Department of Pediatrics, Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang, Hubei, China
| | - Nina Chen
- Department of Pediatrics, Xiangyang No.1 People's Hospital, Hubei University of Medicine, Xiangyang, Hubei, China
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