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Shi H, Zhou C, Zhao Y. Establishment of a diagnostic model of endometriosis based on disulfidptosis-related genes. J Obstet Gynaecol Res 2024; 50:1201-1207. [PMID: 38644543 DOI: 10.1111/jog.15945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Accepted: 03/30/2024] [Indexed: 04/23/2024]
Abstract
OBJECTIVES We aimed to establish a diagnostic model of endometriosis (EM) based on disulfidptosis-related genes (DRGs). MATERIALS AND METHODS The mRNA expression data of EM were downloaded from the gene expression omnibus database and subjected to differential analysis, and co-expression analysis was performed based on 10 disulfidptosis genes to acquire DRGs. The differentially expressed DRGs were subjected to biofunctional analysis. Lasso analysis and support vector machine-recursive feature elimination (SVM-RFE) analysis were employed to extract the intersection of feature genes as biomarkers, and the diagnostic values of biomarkers for EM were evaluated based on receiver operating characteristic curves. The correlations between biomarkers and the immune microenvironment were assessed by Pearson analysis of biomarkers and immune cell infiltration levels. RESULTS Transforming growth factor β stimulated protein clone 22 domain family member 4 (TSC22D4), and F-box/SPRY domain-containing protein 1 (FBXO45) worked as the diagnostic classifiers in EM, with an obvious decrease in FBXO45 expression and an evident increase in TSC22D4 expression. The areas under the curves of FBXO45 and TSC22D4 were 0.752 and 0.706, respectively, and the area of FBXO45 combined with TSC22D4 reached 0.865, suggesting that TSC22D4 and FBXO45 had high predictive values. The diagnostic markers were closely correlated with immune cell infiltration. CONCLUSION The diagnostic markers constructed based on disulfidptosis are good predictors for EM, which have close correlations with EM.
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Affiliation(s)
- Hongyan Shi
- Department of Gynecology, The First Affiliated Hospital of Ningbo University, Ningbo, Zhejiang, China
| | - Caixia Zhou
- Reproductive Medical Center, Xuzhou First People's Hospital, Xuzhou, Jiangsu, China
| | - Yaoyao Zhao
- Department of Gynecology, Zhuji People's Hospital of Zhejiang Province, Zhuji, Zhejiang, China
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Dong X, Shao C, Xu S, Tu J, Xu W, Chen D, Tang Y. Construction and validation of a prognostic signature based on anoikis-related lncRNAs in lung adenocarcinoma. Aging (Albany NY) 2024; 16:9899-9917. [PMID: 38850527 PMCID: PMC11210241 DOI: 10.18632/aging.205905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 05/02/2024] [Indexed: 06/10/2024]
Abstract
Lung adenocarcinoma (LUAD) is the most common type of lung cancer and is characterized by a high death rate and a poor prospect for survival. Anoikis, which is a kind of programmed cell apoptosis, is an important factor in the advancement of tumors. Nonetheless, the function of anoikis-related lncRNAs (ARLRs) in LUAD is still not well understood. The TCGA database was queried for genomic and clinical information. A prognostic signature for ARLRs was established via the use of coexpression analysis and Cox regression. Validation of the model's accuracy was conducted utilizing K-M curves and receiver operating characteristic (ROC) curves, and the signature was utilized to develop a nomogram. LncRNAs were implicated in the progression of tumors, as determined by functional enrichment analysis. There was an improvement in prognosis, increased immune cell infiltration, and higher immune scores among the low-risk patients. Additionally, we found that the two groups had varied anticancer drug sensitivities, which could help guide treatment. The impact of one ARLR, AC026355.2, on migration and invasion was validated by in vitro experiments in LUAD cells. Herein, a new lncRNA signature associated with anoikis was identified and estimated, potentially serving as a prognostic indicator for LUAD patients.
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Affiliation(s)
- Xiaoqi Dong
- Department of Pulmonary and Critical Care Medicine, Ningbo Medical Center Lihuili Hospital (Lihuili Hospital Affiliated to Ningbo University), Ningbo, China
| | - Chuan Shao
- Department of Pulmonary and Critical Care Medicine, Ningbo Medical Center Lihuili Hospital (Lihuili Hospital Affiliated to Ningbo University), Ningbo, China
| | - Shuguang Xu
- Department of Pulmonary and Critical Care Medicine, Ningbo Medical Center Lihuili Hospital (Lihuili Hospital Affiliated to Ningbo University), Ningbo, China
| | - Jinjing Tu
- Department of Pulmonary and Critical Care Medicine, Ningbo Medical Center Lihuili Hospital (Lihuili Hospital Affiliated to Ningbo University), Ningbo, China
| | - Wenjing Xu
- Ningbo University Health Science Center, Ningbo, China
| | - Dahua Chen
- Department of Gastroenterology, Ningbo Medical Center Lihuili Hospital (Lihuili Hospital Affiliated to Ningbo University), Ningbo, China
| | - Yaodong Tang
- Department of Pulmonary and Critical Care Medicine, Ningbo Medical Center Lihuili Hospital (Lihuili Hospital Affiliated to Ningbo University), Ningbo, China
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Zhu B, Hu Y, Wu R, Yu Q, Wen W. FBXO45 levels regulated ferroptosis renal tubular epithelial cells in a model of diabetic nephropathy by PLK1. Open Med (Wars) 2024; 19:20240971. [PMID: 38841177 PMCID: PMC11151394 DOI: 10.1515/med-2024-0971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 04/20/2024] [Accepted: 04/24/2024] [Indexed: 06/07/2024] Open
Abstract
Objective This research aims to investigate the role and underlying biological mechanism of FBXO45 in regulating ferroptosis of renal fibrocytes in a diabetic nephropathy (DN) model. Methods C57BL/6 mice were fed with a high-fat diet and injected with streptozotocin to induce diabetes. Human renal glomerular endothelial cells stimulated with d-glucose. Results Serum FBXO45 mRNA expression was found to be down-regulated in patients with DN. There was a negative correlation between the expression of serum FBXO45 mRNA and serum α-SMA, Collagen I, and E-cadherin mRNA in patients with DN. Additionally, the expression of serum FBXO45 mRNA showed a negative correlation with blood sugar levels. Based on a 3D model prediction, it was observed that FBXO45 interacts with polo-like kinase 1 (PLK1) at GLY-271, ILE-226, GLY-166, LEU-165, ARG-245, and ASN-220, while PLK1 interacts with FBXO45 at TYR-417, ARG-516, HIS-489, TYR-485, GLN-536, and ARG-557. This interaction was confirmed through immunoprecipitation assay, which showed the interlinking of FBXO45 protein with PLK1 protein. Conclusions These findings indicate that FBXO45 plays a role in mitigating ferroptosis in DN through the regulation of the PLK1/GPX4/SOX2 pathway. This highlights the potential of targeting FBXO45 as a therapeutic approach to ameliorate ferroptosis in DN.
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Affiliation(s)
- Bingming Zhu
- Department of Clinical Laboratory, The First Affiliated Hospital of Jinan University, Guangzhou, 510630, China
| | - Yongxuan Hu
- Department of Dermatology and Venereology, The 3rd Affiliated Hospital of SouthernMedical University, Guangdong Provincial Key Laboratory of Bone and Joint Degeneration Diseases, Guangzhou, 510600, China
| | - Ruishan Wu
- NHC Key Laboratory of Male Reproduction and Genetics, Guangdong Provincial Reproductive Science Institute (Guangdong Provincial Fertility Hospital), Guangzhou, 510600, China
| | - Quan Yu
- Medical Experimental Research Center, School of Medicine, Jinan University, Guangzhou, Guangdong, 510630, China
| | - Wangrong Wen
- Clinical Laboratory Center, The Affiliated Shunde Hospital Of Jinan University, Foshan, Guangdong, 528305, China
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Zheng M, Wu L, Xiao R, Cai J, Chen W, Shen S. Fbxo45 facilitates the malignant progression of breast cancer by targeting Bim for ubiquitination and degradation. BMC Cancer 2024; 24:619. [PMID: 38773471 PMCID: PMC11110447 DOI: 10.1186/s12885-024-12382-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 05/14/2024] [Indexed: 05/23/2024] Open
Abstract
BACKGROUND Breast cancer is one of the common malignancies in women. Evidence has demonstrated that FBXO45 plays a pivotal role in oncogenesis and progression. However, the role of FBXO45 in breast tumorigenesis remains elusive. Exploration of the regulatory mechanisms of FBXO45 in breast cancer development is pivotal for potential therapeutic interventions in patients with breast cancer. METHODS Hence, we used numerous approaches to explore the functions of FBXO45 and its underlaying mechanisms in breast cancer pathogenesis, including CCK-8 assay, EdU assay, colony formation analysis, apoptosis assay, RT-PCR, Western blotting, immunoprecipitation, ubiquitination assay, and cycloheximide chase assay. RESULTS We found that downregulation of FBXO45 inhibited cell proliferation, while upregulation of FBXO45 elevated cell proliferation in breast cancer. Silencing of FBXO45 induced cell apoptosis, whereas overexpression of FBXO45 inhibited cell apoptosis in breast cancer. Moreover, FBXO45 interacted with BIM and regulated its ubiquitination and degradation. Furthermore, knockdown of FBXO45 inhibited cell proliferation via regulation of BIM pathway. Notably, overexpression of FBXO45 facilitated tumor growth in mice. Strikingly, FBXO45 expression was associated with poor survival of breast cancer patients. CONCLUSION Our study could provide the rational for targeting FBXO45 to obtain benefit for breast cancer patients. Altogether, modulating FBXO45/Bim axis could be a promising strategy for breast cancer therapy.
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Affiliation(s)
- Mengmeng Zheng
- Department of Oncology and Hematology, Wenzhou Hospital of Integrated Traditional Chinese and Western Medicine, Wenzhou, Zhejiang, China
| | - Linfeng Wu
- Department of Oncology and Hematology, Wenzhou Hospital of Integrated Traditional Chinese and Western Medicine, Wenzhou, Zhejiang, China
| | - Rongyao Xiao
- Department of Oncology and Hematology, Wenzhou Hospital of Integrated Traditional Chinese and Western Medicine, Wenzhou, Zhejiang, China
| | - Jiaohao Cai
- Department of Oncology and Hematology, Wenzhou Hospital of Integrated Traditional Chinese and Western Medicine, Wenzhou, Zhejiang, China
| | - Weike Chen
- Department of Oncology and Hematology, Wenzhou Hospital of Integrated Traditional Chinese and Western Medicine, Wenzhou, Zhejiang, China
| | - Shurong Shen
- Department of Oncology and Hematology, Wenzhou Hospital of Integrated Traditional Chinese and Western Medicine, Wenzhou, Zhejiang, China.
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5
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Zhang F, Wang Y, He Y, Dong B. Correlation of FBXO45 Expression Levels with Cancer Severity by ZEB1 Ubiquitin in Non-Small-Cell Lung Cancer. J Environ Pathol Toxicol Oncol 2024; 43:13-23. [PMID: 39016138 DOI: 10.1615/jenvironpatholtoxicoloncol.2024053018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2024] Open
Abstract
The early diagnostic methods for non-small-cell lung cancer (NSCLC) are limited, lacking effective biomarkers, and the late stage surgery is difficult and has a high recurrence rate. We investigated whether the effects of FBXO45 in arcinogenesis and metastasis of NSCLC. The up-regulation of FBXO45 expression in NSCLC patients or cell lines were observed. FBXO45 gene promoted metastasis and Warburg effect, and reduced ferroptosis of NSCLC. FBXO45 induced ZEB1 expression to promote Warburg effect and reduced ferroptosis of NSCLC. Sh-FBXO45 reduced cancer growth of NSCLC in mice model. FBXO45 decreased the ubiquitination of ZEB1, leading to increased expression of ZEB1, which in turn promoted the Warburg effect and reduced ferroptosis in NSCLC. In vivo imaging, Sh-FBXO45 also reduced ZEB1 expression levels of lung tissue in mice model. FBXO45 in NSCLC through activating the Warburg effect, and the inhibition of ferroptosis of NSCLC by the suppression of ZEB1 ubiquitin, FBXO45 may be a potential therapeutic strategy for NSCLC.
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Affiliation(s)
- Fenjuan Zhang
- Department of Pathology, Xianyang Central Hospital, Xianyang City, 712000 Shaanxi Province, China
| | - Yawei Wang
- Department of Pathology, Qianxian People's Hospital, Qianxian 713300, China
| | - Yan He
- Department of Pathology, Jingyang Country Hospital, Jingyang 713700, China
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Liu S, Liu P, Zhu C, Yang R, He Z, Li Y, Li Y, Fei X, Hou J, Wang X, Pan Y. FBXO28 promotes proliferation, invasion, and metastasis of pancreatic cancer cells through regulation of SMARCC2 ubiquitination. Aging (Albany NY) 2023; 15:5381-5398. [PMID: 37348029 PMCID: PMC10333084 DOI: 10.18632/aging.204780] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 05/24/2023] [Indexed: 06/24/2023]
Abstract
The E3 ligase F-box only protein 28 (FBXO28) belongs to the F-box family of proteins that play a critical role in tumor development. However, the potential function of FBXO28 in pancreatic cancer (PC) and its molecular mechanism remain unclear. In this study, we examined FBXO28 expression in PC and its biological role and explored the mechanism of FBXO28-mediated proliferation, invasion, and metastasis of PC cells. Compared with paracancerous tissues and human normal pancreatic ductal epithelial cells, FBXO28 was highly expressed in PC tissues and cell lines. High expression of FBXO28 was negatively correlated with the survival prognosis of patients with PC. Functional assays indicated that FBXO28 promoted PC cell proliferation, invasion, and metastasis in vitro and in vivo. Furthermore, immunoprecipitation-mass spectrometry was used to identify SMARCC2 as the target of FBXO28; upregulation of SMARCC2 can reverse the effect of overexpression of FBXO28 on promoting the proliferation, invasion, and metastasis of PC cells. Mechanistically, FBXO28 inhibited SMARCC2 expression in post-translation by increasing SMARCC2 ubiquitination and protein degradation. In conclusion, FBXO28 has a potential role in PC, possibly promoting PC progression through SMARCC2 ubiquitination. Thus, FBXO28 might be a potential treatment target in PC.
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Affiliation(s)
- Songbai Liu
- Guizhou Medical University, Guiyang 550000, Guizhou, China
| | - Peng Liu
- Guizhou Medical University, Guiyang 550000, Guizhou, China
- Department of Hepatic-Biliary-Pancreatic Surgery, The Affiliated Hospital of Guizhou Medical University, Guiyang 550000, Guizhou, China
| | - Changhao Zhu
- Department of Hepatic-Biliary-Pancreatic Surgery, The Affiliated Cancer Hospital of Guizhou Medical University, Guiyang 550000, Guizhou, China
| | - Rui Yang
- Department of Hepatobiliary Surgery, Shenzhen Key Laboratory, Shenzhen University General Hospital, Shenzhen 518055, Guangdong, China
| | - Zhiwei He
- Department of Hepatobiliary Surgery, Shenzhen Key Laboratory, Shenzhen University General Hospital, Shenzhen 518055, Guangdong, China
| | - Yongning Li
- Department of Hepatic-Biliary-Pancreatic Surgery, The Affiliated Hospital of Guizhou Medical University, Guiyang 550000, Guizhou, China
| | - Ying Li
- Department of Hepatic-Biliary-Pancreatic Surgery, The Affiliated Cancer Hospital of Guizhou Medical University, Guiyang 550000, Guizhou, China
| | - Xiaobin Fei
- Guizhou Medical University, Guiyang 550000, Guizhou, China
| | - Junyi Hou
- Guizhou Medical University, Guiyang 550000, Guizhou, China
| | - Xing Wang
- Guizhou Medical University, Guiyang 550000, Guizhou, China
- Department of Hepatic-Biliary-Pancreatic Surgery, The Affiliated Cancer Hospital of Guizhou Medical University, Guiyang 550000, Guizhou, China
| | - Yaozhen Pan
- Guizhou Medical University, Guiyang 550000, Guizhou, China
- Department of Hepatic-Biliary-Pancreatic Surgery, The Affiliated Cancer Hospital of Guizhou Medical University, Guiyang 550000, Guizhou, China
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7
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von Danwitz M, Klümper N, Bernhardt M, Cox A, Krausewitz P, Alajati A, Kristiansen G, Ritter M, Ellinger J, Stein J. Identification of F-Box/SPRY Domain-Containing Protein 1 (FBXO45) as a Prognostic Biomarker for TMPRSS2-ERG-Positive Primary Prostate Cancers. Cancers (Basel) 2023; 15:cancers15061890. [PMID: 36980776 PMCID: PMC10046786 DOI: 10.3390/cancers15061890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 02/23/2023] [Accepted: 03/20/2023] [Indexed: 03/30/2023] Open
Abstract
BACKGROUND F-box/SPRY domain-containing protein 1 (FBXO45) plays a crucial role in the regulation of apoptosis via the ubiquitylation and degradation of specific targets. Recent studies indicate the prognostic potential of FBXO45 in several cancers. However, its specific role in prostate carcinoma remains unclear. METHODS A systematic analysis of FBXO45 mRNA expression in PCA was performed using The Cancer Genome Atlas database and a publicly available Gene Expression Omnibus progression PCA cohort. Subsequently, FBXO45 protein expression was assessed via immunohistochemical analysis of a comprehensive tissue microarray cohort. The expression data were correlated with the clinicopathological parameters and biochemical-free survival. The immunohistochemical analyses were stratified according to the TMPRSS2-ERG rearrangement status. To assess the impact of FBXO45 knockdown on the tumour proliferation capacity of cells and metastatic potential, transfection with antisense-oligonucleotides was conducted within a cell culture model. RESULTS FBXO45 mRNA expression was associated with adverse clinicopathological parameters in the TCGA cohort and was enhanced throughout progression to distant metastasis. FBXO45 was associated with shortened biochemical-free survival, which was pronounced for the TMPRSS2-ERG-positive tumours. In vitro, FBXO45 knockdown led to a significant reduction in migration capacity in the PC3, DU145 and LNCaP cell cultures. CONCLUSIONS Comprehensive expression analysis and functional data suggest FBXO45 as a prognostic biomarker in PCA.
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Affiliation(s)
- Marthe von Danwitz
- Department of Urology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
- Center for Integrated Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
| | - Niklas Klümper
- Department of Urology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
- Center for Integrated Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
- Institute of Experimental Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
| | - Marit Bernhardt
- Center for Integrated Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
- Institute of Pathology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
| | - Alexander Cox
- Department of Urology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
- Center for Integrated Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
| | - Philipp Krausewitz
- Department of Urology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
- Center for Integrated Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
| | - Abdullah Alajati
- Department of Urology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
- Center for Integrated Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
| | - Glen Kristiansen
- Center for Integrated Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
- Institute of Pathology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
| | - Manuel Ritter
- Department of Urology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
- Center for Integrated Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
| | - Jörg Ellinger
- Department of Urology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
- Center for Integrated Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
| | - Johannes Stein
- Department of Urology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
- Center for Integrated Oncology, University Hospital Bonn, University of Bonn, 53127 Bonn, Germany
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Yao J, Wang X, Yang J, Yang Z, Zhang Z. SCF-FBXL8 contributes to liver metastasis and stem-cell-like features in colorectal cancer cells by mediating ubiquitination and degradation of TP53. Clin Transl Med 2023; 13:e1208. [PMID: 36855778 PMCID: PMC9975457 DOI: 10.1002/ctm2.1208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 02/12/2023] [Accepted: 02/14/2023] [Indexed: 03/02/2023] Open
Abstract
BACKGROUND FBXL8 is a conserved F-box protein, belonging to the ubiquitin ligase complex, which promotes the development and progression of tumours. However, the regulation function and mechanism of FBXL8's involvement in colorectal cancer (CRC) remain unclear. METHODS RT-PCR is used to detect gene expression levels. Protein levels were determined by western blotting and flow cytometry. The bindings of FBXL8 and p53 and ubiquitination levels were detected by cell transfection and immunoprecipitation. The transwell assay was used to measure the ability of cells to migrate and invade. Animal studies were used to verify the function of FBXL8 in vivo. RESULTS The expression of FBXL8 was up-regulated in CRC tissues, and its overexpression was associated with poor prognosis in CRC patients. The up-regulation of FBXL8 promoted the proliferation, invasion and migration of CRC tumour cells and maintained the stem-cell characteristics of colorectal tumour cells. Further analysis demonstrated that FBXL8 targeted p53 and reduced its stability through ubiquitination. Knockout of FBXL8 down-regulated the proliferation, migration and stem-like properties of tumour cells. CRC mouse xenograft tumour model confirmed that FBXL8 gene knockout inhibited tumour formation and liver metastasis. CONCLUSION FBXL8 was highly expressed in CRC. Mechanism studies have shown that FBXL8 degraded tumour suppressor gene p53 by ubiquitination. FBXL8 knockout inhibited the proliferation and stem characteristics of CRC cells, so SCF-FBXL8-TP53 has potential to be used as a therapeutic target for CRC in subsequent studies.
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Affiliation(s)
- Jing Yao
- Department of SurgeryShanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghaiChina
| | - Xin‐Ping Wang
- Department of SurgeryShanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghaiChina
| | - Jun Yang
- Department of SurgeryShanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghaiChina
| | - Zhe Yang
- Department of SurgeryShanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghaiChina
| | - Zheng‐Yun Zhang
- Department of SurgeryShanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghaiChina
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Tsai M, Osman W, Adair J, ElMergawy R, Chafin L, Johns F, Farkas D, Elhance A, Londino J, Mallampalli RK. The E3 ligase subunit FBXO45 binds the interferon-λ receptor and promotes its degradation during influenza virus infection. J Biol Chem 2022; 298:102698. [PMID: 36379255 PMCID: PMC9747586 DOI: 10.1016/j.jbc.2022.102698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 11/02/2022] [Accepted: 11/08/2022] [Indexed: 11/14/2022] Open
Abstract
Influenza remains a major public health challenge, as the viral infection activates multiple biological networks linked to altered host innate immunity. Following infection, IFN-λ, a ligand crucial for the resolution of viral infections, is known to bind to its cognate receptor, IFNLR1, in lung epithelia. However, little is known regarding the molecular expression and regulation of IFNLR1. Here, we show that IFNLR1 is a labile protein in human airway epithelia that is rapidly degraded after influenza infection. Using an unbiased proximal ligation biotin screen, we first identified that the Skp-Cullin-F box E3 ligase subunit, FBXO45, binds to IFNLR1. We demonstrate that FBXO45, induced in response to influenza infection, mediates IFNLR1 protein polyubiquitination and degradation through the ubiquitin-proteasome system by docking with its intracellular receptor domain. Furthermore, we found ectopically expressed FBXO45 and its silencing in cells differentially regulated both IFNLR1 protein stability and interferon-stimulated gene expression. Mutagenesis studies also indicated that expression of a K319R/K320R IFNLR1 variant in cells exhibited reduced polyubiquitination, yet greater stability and proteolytic resistance to FBXO45 and influenza-mediated receptor degradation. These results indicate that the IFN-λ-IFNLR1 receptor axis is tightly regulated by the Skp-Cullin-F box ubiquitin machinery, a pathway that may be exploited by influenza infection as a means to limit antiviral responses.
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10
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Zhu Y, Liu Z, Guo Y, Li S, Qu Y, Dai L, Chen Y, Ning W, Zhang H, Ma L. Whole-genome sequencing of extrachromosomal circular DNA of cerebrospinal fluid of medulloblastoma. Front Oncol 2022; 12:934159. [PMID: 36452490 PMCID: PMC9703567 DOI: 10.3389/fonc.2022.934159] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 10/12/2022] [Indexed: 03/22/2024] Open
Abstract
BACKGROUND Medulloblastoma (MB) is a malignant tumor associated with a poor prognosis in part due to a lack of effective detection methods. Extrachromosomal circular DNA (eccDNA) has been associated with multiple tumors. Nonetheless, little is currently known on eccDNA in MB. METHODS Genomic features of eccDNAs were identified in MB tissues and matched cerebrospinal fluid (CSF) and compared with corresponding normal samples using Circle map. The nucleotides on both sides of the eccDNAs' breakpoint were analyzed to understand the mechanisms of eccDNA formation. Bioinformatics analysis combined with the Gene Expression Omnibus (GEO) database identified features of eccDNA-related genes in MB. Lasso Cox regression model, univariate and multivariate Cox regression analysis, time-dependent ROC, and Kaplan-Meier curve were used to assess the potential diagnostic and prognostic value of the hub genes. RESULTS EccDNA was profiled in matched tumor and CSF samples from MB patients, and control, eccDNA-related genes enriched in MB were identified. The distribution of eccDNAs in the genome was closely related to gene density and the mechanism of eccDNA formation was evaluated. EccDNAs in CSF exhibited similar distribution with matched MB tissues but were differentially expressed between tumor and normal. Ten hub genes prominent in both the eccDNA dataset and the GEO database were selected to classify MB patients to either high- or low-risk groups, and a prognostic nomogram was thus established. CONCLUSIONS This study provides preliminary evidence of the characteristics and formation mechanism of eccDNAs in MB and CSF. Importantly, eccDNA-associated hub genes in CSF could be used as diagnostic and prognostic biomarkers for MB.
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Affiliation(s)
- Yi Zhu
- Department of Neurosurgery, Binzhou Medical University Hospital, Binzhou, China
| | - Zhihui Liu
- Department of Obstetrics and Gynecology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Yuduo Guo
- Chinese Academy of Sciences (CAS) Key Laboratory of Infection and Immunity, Institute of biophysics, Chinese Academy of Sciences, Beijing, China
| | - Shenglun Li
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China
| | - Yanming Qu
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China
| | - Lin Dai
- Department of Neurosurgery, Binzhou Medical University Hospital, Binzhou, China
| | - Yujia Chen
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China
| | - Weihai Ning
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China
| | - Hongwei Zhang
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China
| | - Lixin Ma
- Department of Neurosurgery, Sanbo Brain Hospital, Capital Medical University, Beijing, China
- Department of Neurosurgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
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Vriend J, Thanasupawat T, Sinha N, Klonisch T. Ubiquitin Proteasome Gene Signatures in Ependymoma Molecular Subtypes. Int J Mol Sci 2022; 23:ijms232012330. [PMID: 36293188 PMCID: PMC9604155 DOI: 10.3390/ijms232012330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/11/2022] [Accepted: 10/12/2022] [Indexed: 11/06/2022] Open
Abstract
The ubiquitin proteasome system (UPS) is critically important for cellular homeostasis and affects virtually all key functions in normal and neoplastic cells. Currently, a comprehensive review of the role of the UPS in ependymoma (EPN) brain tumors is lacking but may provide valuable new information on cellular networks specific to different EPN subtypes and reveal future therapeutic targets. We have reviewed publicly available EPN gene transcription datasets encoding components of the UPS pathway. Reactome analysis of these data revealed genes and pathways that were able to distinguish different EPN subtypes with high significance. We identified differential transcription of several genes encoding ubiquitin E2 conjugases associated with EPN subtypes. The expression of the E2 conjugase genes UBE2C, UBE2S, and UBE2I was elevated in the ST_EPN_RELA subtype. The UBE2C and UBE2S enzymes are associated with the ubiquitin ligase anaphase promoting complex (APC/c), which regulates the degradation of substrates associated with cell cycle progression, whereas UBE2I is a Sumo-conjugating enzyme. Additionally, elevated in ST_EPN_RELA were genes for the E3 ligase and histone deacetylase HDAC4 and the F-box cullin ring ligase adaptor FBX031. Cluster analysis demonstrated several genes encoding E3 ligases and their substrate adaptors as EPN subtype specific genetic markers. The most significant Reactome Pathways associated with differentially expressed genes for E3 ligases and their adaptors included antigen presentation, neddylation, sumoylation, and the APC/c complex. Our analysis provides several UPS associated factors that may be attractive markers and future therapeutic targets for the subtype-specific treatment of EPN patients.
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Affiliation(s)
- Jerry Vriend
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
- Correspondence: ; Tel.: +1-204-789-3732
| | - Thatchawan Thanasupawat
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
| | - Namita Sinha
- Department of Pathology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 3P5, Canada
| | - Thomas Klonisch
- Department of Human Anatomy and Cell Science, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
- Department of Pathology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 3P5, Canada
- Department of Medical Microbiology and Infectious Diseases, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
- Children’s Hospital Research Institute of Manitoba, Winnipeg, MB R3E 3P4, Canada
- CancerCare Manitoba, Winnipeg, MB R3E 0J9, Canada
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12
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Fbxo45 promotes the malignant development of esophageal squamous cell carcinoma by targeting GGNBP2 for ubiquitination and degradation. Oncogene 2022; 41:4795-4807. [PMID: 36127399 DOI: 10.1038/s41388-022-02468-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 09/04/2022] [Accepted: 09/07/2022] [Indexed: 12/24/2022]
Abstract
Esophageal squamous cell carcinoma (ESCC) is one of the most common and deadly cancers. Fbxo45, a substrate recognition subunit of E3 ligase, is critically involved in tumorigenesis and tumor progression. However, the function of Fbxo45 and the underlying mechanisms have not been elucidated in ESCC. We used cellular and molecular methods to explore the molecular basis of Fbxo45-mediated ESCC development. We found that ectopic overexpression of Fbxo45 promoted the growth of Kyse-150, Kyse30 and ECA-109 cells and inhibited the apoptosis. Moreover, overexpression of Fbxo45 promoted the migration and invasion of ESCC cells. Consistently, knockdown of Fbxo45 exhibited the opposite effects on ESCC cells. Mechanistically, we observed that Fbxo45 binds to GGNBP2 via its SPRY domain and targets GGNBP2 for ubiquitination and degradation. GGNBP2 overexpression exhibited anticancer activity in ESCC cells. Furthermore, Fbxo45 exerted its functions by regulating GGNBP2 stability in ESCC cells. Notably, overexpression of Fbxo45 facilitated tumor growth in mice. Strikingly, Fbxo45 was highly expressed in ESCC tissues, and GGNBP2 had a lower expression in ESCC specimens. High expression of Fbxo45 and low expression of GGNBP2 were associated with poor prognosis in ESCC patients. Fbxo45 was negatively correlated with GGNBP2 expression in ESCC tissues. Therefore, Fbxo45 serves as an oncoprotein to promote ESCC tumorigenesis by targeting the stability of the tumor suppressor GGNBP2 in ESCC.
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13
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Cao T, Cui Y, Wang Y, Wu L, Yu K, Chen K, Xia J, Li Y, Wang ZP, Ma J. CACNA1C-AS2 inhibits cell proliferation and suppresses cell migration and invasion via targeting FBXO45 and PI3K/AKT/mTOR pathways in glioma. Apoptosis 2022; 27:979-991. [PMID: 36038736 DOI: 10.1007/s10495-022-01764-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/10/2022] [Indexed: 11/30/2022]
Abstract
Glioma is the most common brain cancer with a poor prognosis, and its underlying molecular mechanisms still needs to be further explored. In the current study, we discovered that an antisense lncRNA, CACNA1C-AS2, suppressed growth, migration and invasion of glioma cells, suggesting that CACNA1C-AS2 functions as a tumor suppressor. Furthermore, we found that CACNA1C-AS2 negatively regulated Fbxo45 protein expression in glioma cells. Impressively, extensive experimental results revealed that Fbxo45 accelerated growth, migration and invasion of glioma cells. Clinically, increased Fbxo45 expression was observed in 75 human glioma tissue samples. Moreover, in vivo experiments also demonstrated that Fbxo45 overexpression enhanced tumor growth in mice. Especially, we further identified that Fbxo45 activated mTORC1 rather than mTORC2 through PI3K/AKT signaling to promote cell growth and motility in glioma cells. Rescue experiments also exhibited that CACNA1C-AS2 inhibited cell growth and motility partly through down-regulating Fbxo45 expression in glioma. Our results provide the novel insights into the critical role of CACNA1C-AS2/Fbxo45/mTOR axis involved in regulating glioma tumorigenesis and progression, and further indicate that CACNA1C-AS2 and Fbxo45 may be the potential biomarkers and therapeutic targets for glioma.
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Affiliation(s)
- Tong Cao
- Department of Clinical Laboratory, the First Affiliated Hospital of Bengbu Medical College, Bengbu, 233004, Anhui, China.,Bengbu Medical College Key Laboratory of Cancer Research and Clinical Laboratory Diagnosis, Bengbu Medical College, Bengbu, 233030, Anhui, China
| | - Yue Cui
- Bengbu Medical College Key Laboratory of Cancer Research and Clinical Laboratory Diagnosis, Bengbu Medical College, Bengbu, 233030, Anhui, China.,Department of Clinical Laboratory, Fuyang People's Hospital, Fuyang, 236001, Anhui, China
| | - Yingying Wang
- Bengbu Medical College Key Laboratory of Cancer Research and Clinical Laboratory Diagnosis, Bengbu Medical College, Bengbu, 233030, Anhui, China
| | - Linhui Wu
- Bengbu Medical College Key Laboratory of Cancer Research and Clinical Laboratory Diagnosis, Bengbu Medical College, Bengbu, 233030, Anhui, China.,Clinical Laboratory Center, Lu'an People's Hospital, The Lu'an Affiliated Hospital of Anhui Medical University, Lu'an, 237000, Anhui, China
| | - Ke Yu
- Bengbu Medical College Key Laboratory of Cancer Research and Clinical Laboratory Diagnosis, Bengbu Medical College, Bengbu, 233030, Anhui, China
| | - Kai Chen
- Bengbu Medical College Key Laboratory of Cancer Research and Clinical Laboratory Diagnosis, Bengbu Medical College, Bengbu, 233030, Anhui, China
| | - Jun Xia
- Department of Biochemistry and Molecular Biology, School of Laboratory Medicine, Bengbu Medical College, 2600 Donghai Street, Bengbu, 233030, Anhui, China
| | - Yuyun Li
- Department of Clinical Laboratory Diagnostics, School of Laboratory Medicine, Bengbu Medical College, Bengbu, 233030, Anhui, China
| | - Zhiwei Peter Wang
- Department of Biochemistry and Molecular Biology, School of Laboratory Medicine, Bengbu Medical College, 2600 Donghai Street, Bengbu, 233030, Anhui, China. .,Center of Scientific Research, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325027, Zhejiang, China.
| | - Jia Ma
- Department of Biochemistry and Molecular Biology, School of Laboratory Medicine, Bengbu Medical College, 2600 Donghai Street, Bengbu, 233030, Anhui, China.
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14
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Shao J, Feng Q, Jiang W, Yang Y, Liu Z, Li L, Yang W, Zou Y. E3 ubiquitin ligase RBX1 drives the metastasis of triple negative breast cancer through a FBXO45-TWIST1-dependent degradation mechanism. Aging (Albany NY) 2022; 14:5493-5510. [PMID: 35802537 PMCID: PMC9320552 DOI: 10.18632/aging.204163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 06/23/2022] [Indexed: 11/25/2022]
Abstract
Triple-negative breast cancer (TNBC) patients are at high risk of recurrence and metastasis in the early stages, although receiving standard treatment. However, the underlying mechanism of TNBC remains unclear. Here, the critical effect of E3 ubiquitin ligase RBX1 in the metastasis of TNBC was reported for the first time. We discovered that RBX1 expression was evidently raised in the tissues of TNBC. Our clinical research displayed that high RBX1 expression was markedly related to poor distant invasion and survival. Functional analysis exhibited that RBX1 facilitated metastasis of TNBC cells through increasing EMT. Furthermore, we demonstrated that RBX1 knockdown increased the levels of the Twist family bHLH transcription factor 1 (TWIST1), is a significant regulator in the EMT process in some cancers. It can be observed an evident positive correlation between the TWIST1 and RBX1 levels, further confirming that EMT induced by RBX1 in TNBC cells is determined by TWIST1. Mechanistically, RBX1 modulates the expression of TWIST1 via modulating FBXO45, directly binding to FBXO45, and facilitating its degradation and ubiquitination. Briefly, our findings confirm that RBX1 is probably a new biomarker of TNBC carcinogenesis, thus suggesting that targeting the RBX1/FBXO45/TWIST1 axis may be an underlying strategy for TNBC treatment.
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Affiliation(s)
- Jun Shao
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Qian Feng
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Weifan Jiang
- Department of Urology Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Yuting Yang
- Department of Medical College, Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Zhiqiang Liu
- Department of Neurology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang 330006, Jiangxi Province, China
| | - Liang Li
- Emergency Department, Jiangxi Maternal and Child Health Hospital, Nanchang 330006, Jiangxi Province, China
| | - Wenlong Yang
- Department of Infectious Diseases, The Second Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Yufeng Zou
- Department of Breast Surgery, The Third Hospital of Nanchang, Jiangxi Provincial-Key-Laboratory for Breast Diseases, Nanchang 330006, Jiangxi Province, China.,Department of Medical College, Nanchang University, Nanchang 330006, Jiangxi Province, China
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15
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Ganapathy K, Ngo C, Andl T, Coppola D, Park J, Chakrabarti R. Anti-cancer function of microRNA-30e is mediated by negative regulation of HELLPAR, a noncoding macroRNA, and genes involved in ubiquitination and cell cycle progression in prostate cancer. Mol Oncol 2022; 16:2936-2958. [PMID: 35612714 PMCID: PMC9394257 DOI: 10.1002/1878-0261.13255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 02/08/2022] [Accepted: 03/17/2022] [Indexed: 11/07/2022] Open
Abstract
Prostate cancer (PCa) progression relies on androgen receptor (AR) function, making AR a top candidate for PCa therapy. However, development of drug resistance is common, which eventually leads to development of castration‐resistant PCa. This warrants a better understanding of the pathophysiology of PCa that facilitates the aberrant activation of key signaling pathways including AR. MicroRNAs (miRNAs) function as regulators of cancer progression as they modulate various cellular processes. Here, we demonstrate a multidimensional function of miR‐30e through the regulation of genes involved in various signaling pathways. We noted loss of miR‐30e expression in prostate tumors, which, when restored, led to cell cycle arrest, induction of apoptosis, improved drug sensitivity of PCa cells and reduced tumor progression in xenograft models. We show that experimental upregulation of miR‐30e reduces expression of mRNAs including AR, FBXO45, SRSF7 and MYBL2 and a novel long noncoding RNA (lncRNA) HELLPAR, which are involved in cell cycle, apoptosis and ubiquitination, and the effects could be rescued by inhibition of miR‐30e expression. RNA immunoprecipitation analysis confirmed direct interactions between miR‐30e and its RNA targets. We noted a newly identified reciprocal relationship between miR‐30e and HELLPAR, as inhibition of HELLPAR improved stabilization of miR‐30e. Transcriptome profiling and quantitative real‐time PCR (qRT‐PCR) validation of miR‐30e‐expressing PCa cells showed differential expression of genes involved in cell cycle progression, apoptosis and ubiquitination, which supports our in vitro study. This study demonstrates an integrated function of miR‐30e on dysregulation of miRNA/lncRNA/mRNA axes that may have diagnostic and therapeutic significance in aggressive PCa.
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Affiliation(s)
- Kavya Ganapathy
- Burnett School of Biomedical Sciences, University of Central Florida, Orlando, Florida, USA
| | - Christopher Ngo
- Burnett School of Biomedical Sciences, University of Central Florida, Orlando, Florida, USA
| | - Thomas Andl
- Burnett School of Biomedical Sciences, University of Central Florida, Orlando, Florida, USA
| | - Domenico Coppola
- Department of Pathology, Moffitt Cancer Center, Tampa, Florida, USA.,Florida Digestive Health Specialists, Bradenton, Florida, USA
| | - Jong Park
- Department of Cancer Epidemiology, Moffitt Cancer Center, Tampa, Florida, USA
| | - Ratna Chakrabarti
- Burnett School of Biomedical Sciences, University of Central Florida, Orlando, Florida, USA
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16
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Desbois M, Opperman KJ, Amezquita J, Gaglio G, Crawley O, Grill B. Ubiquitin ligase activity inhibits Cdk5 to control axon termination. PLoS Genet 2022; 18:e1010152. [PMID: 35421092 PMCID: PMC9041834 DOI: 10.1371/journal.pgen.1010152] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 04/26/2022] [Accepted: 03/17/2022] [Indexed: 01/29/2023] Open
Abstract
The Cdk5 kinase plays prominent roles in nervous system development, plasticity, behavior and disease. It also has important, non-neuronal functions in cancer, the immune system and insulin secretion. At present, we do not fully understand negative regulatory mechanisms that restrict Cdk5. Here, we use Caenorhabditis elegans to show that CDK-5 is inhibited by the RPM-1/FSN-1 ubiquitin ligase complex. This atypical RING ubiquitin ligase is conserved from C. elegans through mammals. Our finding originated from unbiased, in vivo affinity purification proteomics, which identified CDK-5 as a putative RPM-1 substrate. CRISPR-based, native biochemistry showed that CDK-5 interacts with the RPM-1/FSN-1 ubiquitin ligase complex. A CRISPR engineered RPM-1 substrate ‘trap’ enriched CDK-5 binding, which was mediated by the FSN-1 substrate recognition module. To test the functional genetic relationship between the RPM-1/FSN-1 ubiquitin ligase complex and CDK-5, we evaluated axon termination in mechanosensory neurons and motor neurons. Our results indicate that RPM-1/FSN-1 ubiquitin ligase activity restricts CDK-5 to control axon termination. Collectively, these proteomic, biochemical and genetic results increase our understanding of mechanisms that restrain Cdk5 in the nervous system. Cdk5 is an atypical cyclin dependent kinase and an important player in nervous system development, plasticity, and disease. Decades of research has focused on understanding how Cdk5 is activated. In contrast, we know much less about the genetic and molecular mechanisms that restrict Cdk5 activity. Here, we examined how Cdk5 is inhibited in the nervous system using the model organism C. elegans. Our results indicate that the RPM-1/FSN-1 E3 ubiquitin ligase complex inhibits Cdk5 to control termination of axon growth. Our finding that ubiquitin ligase activity restricts Cdk5 in the nervous system in vivo now opens up the interesting possibility that ubiquitin ligase activity might regulate Cdk5 in other cellular contexts and disease settings.
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Affiliation(s)
- Muriel Desbois
- Center for Integrative Brain Research, Seattle Children’s Research Institute, Seattle, Washington, United States of America
| | - Karla J. Opperman
- Center for Integrative Brain Research, Seattle Children’s Research Institute, Seattle, Washington, United States of America
| | - Jonathan Amezquita
- Center for Integrative Brain Research, Seattle Children’s Research Institute, Seattle, Washington, United States of America
- Molecular and Cellular Biology Graduate Program, University of Washington, Seattle, Washington, United States of America
| | - Gabriel Gaglio
- Department of Neuroscience, The Scripps Research Institute, Jupiter, Florida, United States of America
| | - Oliver Crawley
- Instituto de Neurociencias de Alicante, Universidad Miguel Hernández-CSIC, San Juan de Alicante, Spain
| | - Brock Grill
- Center for Integrative Brain Research, Seattle Children’s Research Institute, Seattle, Washington, United States of America
- Department of Pediatrics, University of Washington School of Medicine, Seattle, Washington, United States of America
- Department of Pharmacology, University of Washington M1-A303/305 Behnke Conference Room, Arnold building, Seattle, Washington, United States of America
- * E-mail:
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17
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Wu L, Yu K, Chen K, Zhu X, Yang Z, Wang Q, Gao J, Wang Y, Cao T, Xu H, Pan X, Wang L, Xia J, Li Y, Wang ZP, Ma J. Fbxo45 facilitates pancreatic carcinoma progression by targeting USP49 for ubiquitination and degradation. Cell Death Dis 2022; 13:231. [PMID: 35279684 PMCID: PMC8918322 DOI: 10.1038/s41419-022-04675-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 02/12/2022] [Accepted: 02/18/2022] [Indexed: 12/27/2022]
Abstract
Fbxo45, a conserved F-box protein, comprises of an atypical SKP1, CUL1, F-box protein (SCF) ubiquitin ligase complex that promotes tumorigenesis and development. However, the biological function and molecular mechanisms of Fbxo45 involved in pancreatic carcinogenesis are ambiguous. We conducted several approaches, including transfection, coIP, real-time polymerase chain reaction (RT-PCR), Western blotting, ubiquitin assays, and animal studies, to explore the role of Fbxo45 in pancreatic cancer. Here, we report that USP49 stability is governed by Fbxo45-mediated ubiquitination and is enhanced by the absence of Fbxo45. Moreover, Fbxo45 binds to a short consensus sequence of USP49 through its SPRY domain. Furthermore, Fbxo45-mediated USP49 ubiquitination and degradation are enhanced by NEK6 kinase. Functionally, Fbxo45 increases cell viability and motility capacity by targeting USP49 in pancreatic cancer cells. Xenograft mouse experiments demonstrated that ectopic expression of Fbxo45 enhanced tumor growth in mice and that USP49 overexpression inhibited tumor growth in vivo. Notably, Fbxo45 expression was negatively associated with USP49 expression in pancreatic cancer tissues. Fbxo45 serves as an oncoprotein to facilitate pancreatic oncogenesis by regulating the stability of the tumor suppressor USP49 in pancreatic cancer.
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Affiliation(s)
- Linhui Wu
- Bengbu Medical College Key Laboratory of Cancer Research and Clinical Laboratory Diagnosis, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Ke Yu
- Bengbu Medical College Key Laboratory of Cancer Research and Clinical Laboratory Diagnosis, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Kai Chen
- Bengbu Medical College Key Laboratory of Cancer Research and Clinical Laboratory Diagnosis, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Xuelian Zhu
- Department of Laboratory Medicine, School of Laboratory Medicine, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Zheng Yang
- Department of Laboratory Medicine, School of Laboratory Medicine, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Qi Wang
- Department of Pathology, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Junjie Gao
- Bengbu Medical College Key Laboratory of Cancer Research and Clinical Laboratory Diagnosis, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Yingying Wang
- Bengbu Medical College Key Laboratory of Cancer Research and Clinical Laboratory Diagnosis, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Tong Cao
- Department of Clinical Laboratory, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, 233004, China
| | - Hui Xu
- Department of Clinical Laboratory Diagnostics, School of Laboratory Medicine, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Xueshan Pan
- Department of Biochemistry and Molecular Biology, School of Laboratory Medicine, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Lixia Wang
- Department of Urology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu, 215006, China
| | - Jun Xia
- Department of Biochemistry and Molecular Biology, School of Laboratory Medicine, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Yuyun Li
- Department of Clinical Laboratory Diagnostics, School of Laboratory Medicine, Bengbu Medical College, Bengbu, Anhui, 233030, China
| | - Zhiwei Peter Wang
- Department of Biochemistry and Molecular Biology, School of Laboratory Medicine, Bengbu Medical College, Bengbu, Anhui, 233030, China.
- Center of Scientific Research, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325027, China.
| | - Jia Ma
- Department of Biochemistry and Molecular Biology, School of Laboratory Medicine, Bengbu Medical College, Bengbu, Anhui, 233030, China.
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18
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Zhang Y, Liu Q, Cui M, Wang M, Hua S, Gao J, Liao Q. Comprehensive Analysis of Expression, Prognostic Value, and Immune Infiltration for Ubiquitination-Related FBXOs in Pancreatic Ductal Adenocarcinoma. Front Immunol 2022; 12:774435. [PMID: 35046938 PMCID: PMC8761623 DOI: 10.3389/fimmu.2021.774435] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 11/22/2021] [Indexed: 11/13/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is one of the most refractory human malignancies. F-box only proteins (FBXO) are the core components of SKP1-cullin 1-F-box E3 ubiquitin ligase, which have been reported to play crucial roles in tumor initiation and progression via ubiquitination-mediated proteasomal degradation. However, the clinical implications and biological functions of FBXOs in PDAC have not been fully clarified. Herein we perform a comprehensive analysis for the clinical values and functional roles of FBXOs in PDAC using different public databases. We found that FBXO1 (CCNF), FBXO20 (LMO7), FBXO22, FBXO28, FBXO32, and FBXO45 (designated six-FBXOs) were robustly upregulated in PDAC tissues, which predicted an adverse prognosis of PDAC patients. There was a significant correlation between the expression levels of six-FBXOs and the clinicopathological features in PDAC. The transcriptional levels of six-FBXOs were subjected to the influence of promoter methylation levels. There were more than 40% genetic alterations and mutations of six-FBXOs, which affected the clinical outcome of PDAC patients. Furthermore, the expression of six-FBXOs was associated with immune infiltrations and activated status, including B cells, CD8+ T cells, CD4+ T cells, NK cells, macrophages, and dendritic cells. The functional prediction revealed that the six-FBXOs were involved in ubiquitination-related pathways and other vital signaling pathways, such as p53, PI3K/Akt, and Hippo pathway. Therefore, six-FBXOs are the promising prognostic biomarkers or potential targets for PDAC diagnosis and treatment.
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Affiliation(s)
- Yalu Zhang
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Qiaofei Liu
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Ming Cui
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Mengyi Wang
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Surong Hua
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Junyi Gao
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
| | - Quan Liao
- Department of General Surgery, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, China
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19
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Chen X, Song J, Wang X, Sun D, Liu Y, Jiang Y. LncRNA LINC00460: Function and mechanism in human cancer. Thorac Cancer 2022; 13:3-14. [PMID: 34821482 PMCID: PMC8720622 DOI: 10.1111/1759-7714.14238] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 11/01/2021] [Accepted: 11/03/2021] [Indexed: 12/15/2022] Open
Abstract
Long non-coding RNAs (LncRNAs), which are more than 200 nucleotides in length and with limited protein-coding potential, play vital roles in the pathogenesis, tumorigenesis, and angiogenesis of cancers. Aberrant expression of lncRNAs has been detected in various carcinomas and may be correlated with oncogenesis by affecting related genes expression. Recently, an increasing number of studies have reported on long intergenic non-protein coding RNA 460 (LINC00460) in human tumor fields. LINC00460 is upregulated in diverse cancer tissues and cells. The upregulated expression level of LINC00460 is correlated with larger tumor size, tumor node metastasis (TNM) stage, lymph node metastasis, and shorter overall survival. The regulatory mechanism of LINC00460 was complex and diverse. LINC00460 could act as a competitive endogenous RNA (ceRNA), directly bind with proteins or regulate multiple pathways, which affected tumor progression. Moreover, LINC00460 was also identified to increase drug resistance, and therefore, weaken the effectiveness of tumor treatment. It has become increasingly important to investigate the roles of LINC00460 in various cancers by different mechanisms. Therefore, a more comprehensive understanding of LINC00460 is crucial to expound on the cellular function and molecular mechanism of human cancers. In this review, we refer to studies concerning LINC00460 and provide the basis for the evaluation of LINC00460 as a predicted biomarker or potential therapeutic target in malignancies, and also provide ideas for the future research of lncRNAs similar to LINC00460.
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Affiliation(s)
- Xi Chen
- School of StomatologyWeifang Medical UniversityWeifangShandongChina
| | - Jiwu Song
- Department of StomatologyWeifang People's Hospital, First Affiliated Hospital of Weifang Medical UniversityWeifangShandongChina
| | - Xiaoxiao Wang
- School of StomatologyWeifang Medical UniversityWeifangShandongChina
- Department of DentistryAffiliated Hospital of Weifang Medical UniversityWeifangShandongChina
| | - Dongyuan Sun
- School of StomatologyWeifang Medical UniversityWeifangShandongChina
- Department of DentistryAffiliated Hospital of Weifang Medical UniversityWeifangShandongChina
| | - Yunxia Liu
- School of StomatologyWeifang Medical UniversityWeifangShandongChina
- Department of DentistryAffiliated Hospital of Weifang Medical UniversityWeifangShandongChina
| | - Yingying Jiang
- School of StomatologyWeifang Medical UniversityWeifangShandongChina
- Department of DentistryAffiliated Hospital of Weifang Medical UniversityWeifangShandongChina
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20
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Tang X, Sui X, Weng L, Liu Y. SNAIL1: Linking Tumor Metastasis to Immune Evasion. Front Immunol 2021; 12:724200. [PMID: 34917071 PMCID: PMC8669501 DOI: 10.3389/fimmu.2021.724200] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 11/15/2021] [Indexed: 12/12/2022] Open
Abstract
The transcription factor Snail1, a key inducer of epithelial-mesenchymal transition (EMT), plays a critical role in tumor metastasis. Its stability is strictly controlled by multiple intracellular signal transduction pathways and the ubiquitin-proteasome system (UPS). Increasing evidence indicates that methylation and acetylation of Snail1 also affects tumor metastasis. More importantly, Snail1 is involved in tumor immunosuppression by inducing chemokines and immunosuppressive cells into the tumor microenvironment (TME). In addition, some immune checkpoints potentiate Snail1 expression, such as programmed death ligand 1 (PD-L1) and T cell immunoglobulin 3 (TIM-3). This mini review highlights the pathways and molecules involved in maintenance of Snail1 level and the significance of Snail1 in tumor immune evasion. Due to the crucial role of EMT in tumor metastasis and tumor immunosuppression, comprehensive understanding of Snail1 function may contribute to the development of novel therapeutics for cancer.
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Affiliation(s)
- Xiaolong Tang
- Department of Laboratory Medicine, Binzhou Medical University, Binzhou, China
| | - Xue Sui
- Department of Laboratory Medicine, Binzhou Medical University, Binzhou, China
| | - Liang Weng
- Department of Oncology, Xiangya Cancer Center, Xiangya Hospital, Central South University, Changsha, China.,Key Laboratory of Molecular Radiation Oncology Hunan Province, Xiangya Hospital, Central South University, Changsha, China.,Hunan International Science and Technology Collaboration Base of Precision Medicine for Cancer, Xiangya Hospital, Central South University, Changsha, China.,Hunan Provincial Clinical Research Center for Respiratory Diseases, Xiangya Hospital, Central South University, Changsha, China.,Institute of Gerontological Cancer Research, National Clinical Research Center for Gerontology, Changsha, China.,Center for Molecular Imaging of Central South University, Xiangya Hospital, Changsha, China
| | - Yongshuo Liu
- Department of Clinical Laboratory, Binzhou Medical University Hospital, Binzhou, China.,Biomedical Pioneering Innovation Center (BIOPIC), Beijing Advanced Innovation Center for Genomics, Peking-Tsinghua Center for Life Sciences, Peking University Genome Editing Research Center, State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, China
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21
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Lai Y, Li X, Li T, Nyunoya T, Chen K, Kitsios GD, Nouraie SM, Zhang Y, McVerry BJ, Lee JS, Mallampalli RK, Zou C. Endotoxin stabilizes protein arginine methyltransferase 4 (PRMT4) protein triggering death of lung epithelia. Cell Death Dis 2021; 12:828. [PMID: 34480022 PMCID: PMC8414963 DOI: 10.1038/s41419-021-04115-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 08/10/2021] [Accepted: 08/19/2021] [Indexed: 02/07/2023]
Abstract
Lung epithelial cell death is a prominent feature of acute lung injury and acute respiratory distress syndrome (ALI/ARDS), which results from severe pulmonary infection leading to respiratory failure. Multiple mechanisms are believed to contribute to the death of epithelia; however, limited data propose a role for epigenetic modifiers. In this study, we report that a chromatin modulator protein arginine N-methyltransferase 4/coactivator-associated arginine methyltransferase 1 (PRMT4/CARM1) is elevated in human lung tissues with pneumonia and in experimental lung injury models. Here PRMT4 is normally targeted for its degradation by an E3 ubiquitin ligase, SCFFBXO9, that interacts with PRMT4 via a phosphodegron to ubiquitinate the chromatin modulator at K228 leading to its proteasomal degradation. Bacterial-derived endotoxin reduced levels of SCFFBXO9 thus increasing PRMT4 cellular concentrations linked to epithelial cell death. Elevated PRMT4 protein caused substantial epithelial cell death via caspase 3-mediated cell death signaling, and depletion of PRMT4 abolished LPS-mediated epithelial cell death both in cellular and murine injury models. These findings implicate a unique molecular interaction between SCFFBXO9 and PRMT4 and its regulation by endotoxin that impacts the life span of lung epithelia, which may play a key role in the pathobiology of tissue injury observed during critical respiratory illness.
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Affiliation(s)
- Yandong Lai
- grid.21925.3d0000 0004 1936 9000Division of Pulmonary, Allergy, Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA USA
| | - Xiuying Li
- grid.413935.90000 0004 0420 3665Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA USA
| | - Tiao Li
- grid.21925.3d0000 0004 1936 9000Division of Pulmonary, Allergy, Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA USA
| | - Toru Nyunoya
- grid.21925.3d0000 0004 1936 9000Division of Pulmonary, Allergy, Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA USA ,grid.413935.90000 0004 0420 3665Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA USA
| | - Kong Chen
- grid.21925.3d0000 0004 1936 9000Division of Pulmonary, Allergy, Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA USA ,grid.21925.3d0000 0004 1936 9000Acute Lung Injury Center of Excellence, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA USA
| | - Georgios D. Kitsios
- grid.21925.3d0000 0004 1936 9000Division of Pulmonary, Allergy, Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA USA ,grid.21925.3d0000 0004 1936 9000Acute Lung Injury Center of Excellence, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA USA
| | - Seyed Mehdi Nouraie
- grid.21925.3d0000 0004 1936 9000Division of Pulmonary, Allergy, Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA USA ,grid.21925.3d0000 0004 1936 9000Acute Lung Injury Center of Excellence, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA USA
| | - Yingze Zhang
- grid.21925.3d0000 0004 1936 9000Division of Pulmonary, Allergy, Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA USA
| | - Bryan J. McVerry
- grid.21925.3d0000 0004 1936 9000Division of Pulmonary, Allergy, Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA USA ,grid.21925.3d0000 0004 1936 9000Acute Lung Injury Center of Excellence, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA USA ,grid.21925.3d0000 0004 1936 9000Department of Environmental and Occupational Health, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA USA
| | - Janet S. Lee
- grid.21925.3d0000 0004 1936 9000Division of Pulmonary, Allergy, Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA USA ,grid.21925.3d0000 0004 1936 9000Acute Lung Injury Center of Excellence, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA USA
| | - Rama K. Mallampalli
- grid.21925.3d0000 0004 1936 9000Division of Pulmonary, Allergy, Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA USA ,grid.261331.40000 0001 2285 7943Department of Medicine, Ohio State University College of Medicine, Columbus, OH USA
| | - Chunbin Zou
- grid.21925.3d0000 0004 1936 9000Division of Pulmonary, Allergy, Critical Care Medicine, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA USA ,grid.413935.90000 0004 0420 3665Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA USA ,grid.21925.3d0000 0004 1936 9000Acute Lung Injury Center of Excellence, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA USA ,grid.21925.3d0000 0004 1936 9000Department of Environmental and Occupational Health, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA USA
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22
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Lin X, Wang R, Li R, Tao T, Zhang D, Qi Y. Diagnostic Performance of miR-485-3p in Patients with Parkinson's Disease and its Relationship with Neuroinflammation. Neuromolecular Med 2021; 24:195-201. [PMID: 34279788 DOI: 10.1007/s12017-021-08676-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 07/06/2021] [Indexed: 01/30/2023]
Abstract
Parkinson's disease (PD) is one of the most common progressive neurodegenerative diseases. Some microRNAs (miRNAs) play critical roles in the development of many neurological diseases. This study aims to evaluate the clinical significance and biological function of miR-485-3p in the development and progression of PD. The expression of miR-485-3p in serum of PD patients was analyzed by quantitative real-time PCR (qRT-PCR). LPS-treated microglia BV2 cells were used to mimic neuroinflammation in the pathogenesis of PD. The levels of inflammatory cytokines, including IL-1β, IL-6 and TNF-α, were detected by enzyme-linked immunosorbent assay (ELISA). The diagnosis value of miR-485-3p was evaluated by plotting receiver operating characteristic (ROC) curves. A luciferase reporter assay was performed to demonstrate the interaction between miR-485-3p and FBXO45. The results showed that miR-485-3p was significantly up-regulated in serum of PD patients compared with that in both Alzheimer's disease (AD) and healthy cases, and had diagnostic accuracy for PD screening. The activated microglia BV2 cells induced by LPS also had elevated miR-485-3p, and the knockdown of miR-485-3p inhibited the release of pro-inflammatory cytokines. FBXO protein 45 (FBXO45) served as a potential target of miR-485-3p, which was speculated to mediate the function of miR-485-3p. Our results suggest that the up-regulated expression of miR-485-3p in PD may be a novel diagnostic biomarker for PD. Reducing the expression level of miR-485-3p can inhibit the inflammatory responses of BV2 cells, which indicated that miR-485-3p, as a regulator of neuroinflammation, may have the potential as a therapeutic target in PD.
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Affiliation(s)
- Xia Lin
- Department of Neurology, Taizhou Central Hospital (Taizhou University Hospital), Taizhou, 318000, Zhejiang, China
| | - Rui Wang
- Department of Neurology, Liaocheng People's Hospital, Liaocheng, 252000, Shandong, China
| | - Ran Li
- Department of Neurology, Weifang Hospital of Traditional Chinese Medicine, Weifang, 261014, Shandong, China
| | - Taotao Tao
- Department of Neurology, Taizhou Central Hospital (Taizhou University Hospital), Taizhou, 318000, Zhejiang, China
| | - Danhong Zhang
- Department of Neurology, Taizhou Central Hospital (Taizhou University Hospital), Taizhou, 318000, Zhejiang, China
| | - Yuxiang Qi
- Department of Neurology, Shengli Oilfield Central Hospital, No. 31, Jinan Road, Dongying District, Dongying, 257000, Shandong, China.
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23
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DNAJB9 suppresses the metastasis of triple-negative breast cancer by promoting FBXO45-mediated degradation of ZEB1. Cell Death Dis 2021; 12:461. [PMID: 33966034 PMCID: PMC8106677 DOI: 10.1038/s41419-021-03757-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 04/21/2021] [Accepted: 04/22/2021] [Indexed: 12/27/2022]
Abstract
DNAJB9, a member of the heat shock protein 40 family, acts as a multifunctional player involved in the maintenance of their client proteins and cellular homeostasis. However, the mechanistic action of DNAJB9 in human malignancies is yet to be fully understood. In this study, we found that ectopic restoration of DNAJB9 inhibits the migration, invasion, in vivo metastasis, and lung colonization of triple-negative breast cancer (TNBC) cells. Mechanistically, DNAJB9 stabilizes FBXO45 protein by suppressing self-ubiquitination and reduces the abundance of ZEB1 by Lys48-linked polyubiquitination to inhibit the epithelial-mesenchymal transition (EMT) and metastasis. Clinically, the reduction of DNAJB9 expression, concomitant with decreased FBXO45 abundance in breast cancer tissues, correlates with poorer clinical outcomes of patients with breast cancer. Taken together, our results provide a novel insight into the metastasis of TNBC and define a promising therapeutic strategy for cancers with overactive ZEB1 by regulating the DNAJB9-FBXO45 signaling axis.
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24
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Omran Z, H. Dalhat M, Abdullah O, Kaleem M, Hosawi S, A Al-Abbasi F, Wu W, Choudhry H, Alhosin M. Targeting Post-Translational Modifications of the p73 Protein: A Promising Therapeutic Strategy for Tumors. Cancers (Basel) 2021; 13:cancers13081916. [PMID: 33921128 PMCID: PMC8071514 DOI: 10.3390/cancers13081916] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/12/2021] [Accepted: 04/12/2021] [Indexed: 01/11/2023] Open
Abstract
The tumor suppressor p73 is a member of the p53 family and is expressed as different isoforms with opposing properties. The TAp73 isoforms act as tumor suppressors and have pro-apoptotic effects, whereas the ΔNp73 isoforms lack the N-terminus transactivation domain and behave as oncogenes. The TAp73 protein has a high degree of similarity with both p53 function and structure, and it induces the regulation of various genes involved in the cell cycle and apoptosis. Unlike those of the p53 gene, the mutations in the p73 gene are very rare in tumors. Cancer cells have developed several mechanisms to inhibit the activity and/or expression of p73, from the hypermethylation of its promoter to the modulation of the ratio between its pro- and anti-apoptotic isoforms. The p73 protein is also decorated by a panel of post-translational modifications, including phosphorylation, acetylation, ubiquitin proteasomal pathway modifications, and small ubiquitin-related modifier (SUMO)ylation, that regulate its transcriptional activity, subcellular localization, and stability. These modifications orchestrate the multiple anti-proliferative and pro-apoptotic functions of TAp73, thereby offering multiple promising candidates for targeted anti-cancer therapies. In this review, we summarize the current knowledge of the different pathways implicated in the regulation of TAp73 at the post-translational level. This review also highlights the growing importance of targeting the post-translational modifications of TAp73 as a promising antitumor strategy, regardless of p53 status.
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Affiliation(s)
- Ziad Omran
- College of Pharmacy, Umm Al-Qura University, Makkah 21955, Saudi Arabia; (Z.O.); (O.A.)
| | - Mahmood H. Dalhat
- King Fahd Medical Research Center, Cancer and Mutagenesis Unit, Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (M.H.D.); (M.K.); (S.H.); (F.A.A.-A.); (H.C.)
| | - Omeima Abdullah
- College of Pharmacy, Umm Al-Qura University, Makkah 21955, Saudi Arabia; (Z.O.); (O.A.)
| | - Mohammed Kaleem
- King Fahd Medical Research Center, Cancer and Mutagenesis Unit, Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (M.H.D.); (M.K.); (S.H.); (F.A.A.-A.); (H.C.)
| | - Salman Hosawi
- King Fahd Medical Research Center, Cancer and Mutagenesis Unit, Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (M.H.D.); (M.K.); (S.H.); (F.A.A.-A.); (H.C.)
| | - Fahd A Al-Abbasi
- King Fahd Medical Research Center, Cancer and Mutagenesis Unit, Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (M.H.D.); (M.K.); (S.H.); (F.A.A.-A.); (H.C.)
| | - Wei Wu
- Department of Medicine, University of California, San Francisco, CA 94143, USA;
| | - Hani Choudhry
- King Fahd Medical Research Center, Cancer and Mutagenesis Unit, Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (M.H.D.); (M.K.); (S.H.); (F.A.A.-A.); (H.C.)
| | - Mahmoud Alhosin
- King Fahd Medical Research Center, Cancer and Mutagenesis Unit, Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (M.H.D.); (M.K.); (S.H.); (F.A.A.-A.); (H.C.)
- Correspondence: ; Tel.: +96-65-9795-9354
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