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Bacigalupa ZA, Arner EN, Vlach LM, Wolf MM, Brown WA, Krystofiak ES, Ye X, Hongo RA, Landis M, Amason EK, Beckermann KE, Rathmell WK, Rathmell JC. HIF-2α expression and metabolic signaling require ACSS2 in clear cell renal cell carcinoma. J Clin Invest 2024; 134:e164249. [PMID: 38941296 PMCID: PMC11178540 DOI: 10.1172/jci164249] [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: 08/08/2022] [Accepted: 05/01/2024] [Indexed: 06/30/2024] Open
Abstract
Clear cell renal cell carcinoma (ccRCC) is an aggressive cancer driven by VHL loss and aberrant HIF-2α signaling. Identifying means to regulate HIF-2α thus has potential therapeutic benefit. Acetyl-CoA synthetase 2 (ACSS2) converts acetate to acetyl-CoA and is associated with poor patient prognosis in ccRCC. Here we tested the effects of ACSS2 on HIF-2α and cancer cell metabolism and growth in ccRCC models and clinical samples. ACSS2 inhibition reduced HIF-2α levels and suppressed ccRCC cell line growth in vitro, in vivo, and in cultures of primary ccRCC patient tumors. This treatment reduced glycolytic signaling, cholesterol metabolism, and mitochondrial integrity, all of which are consistent with loss of HIF-2α. Mechanistically, ACSS2 inhibition decreased chromatin accessibility and HIF-2α expression and stability. While HIF-2α protein levels are widely regulated through pVHL-dependent proteolytic degradation, we identify a potential pVHL-independent pathway of degradation via the E3 ligase MUL1. We show that MUL1 can directly interact with HIF-2α and that overexpression of MUL1 decreased HIF-2α levels in a manner partially dependent on ACSS2. These findings identify multiple mechanisms to regulate HIF-2α stability and ACSS2 inhibition as a strategy to complement HIF-2α-targeted therapies and deplete pathogenically stabilized HIF-2α.
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Affiliation(s)
- Zachary A. Bacigalupa
- Department of Medicine
- Department of Pathology, Microbiology, and Immunology, and
- Vanderbilt Center for Immunobiology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Emily N. Arner
- Department of Medicine
- Department of Pathology, Microbiology, and Immunology, and
| | | | - Melissa M. Wolf
- Department of Medicine
- Department of Pathology, Microbiology, and Immunology, and
| | | | - Evan S. Krystofiak
- Cell Imaging Shared Resource, Vanderbilt University, Nashville, Tennessee, USA
| | - Xiang Ye
- Department of Pathology, Microbiology, and Immunology, and
| | - Rachel A. Hongo
- Department of Medicine
- Department of Pathology, Microbiology, and Immunology, and
| | - Madelyn Landis
- Department of Medicine
- Department of Pathology, Microbiology, and Immunology, and
| | | | | | - W. Kimryn Rathmell
- Department of Medicine
- Vanderbilt Center for Immunobiology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Jeffrey C. Rathmell
- Department of Pathology, Microbiology, and Immunology, and
- Vanderbilt Center for Immunobiology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
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2
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Cai Z, Luo W, Wang H, Zhu R, Yuan Y, Zhan X, Xie M, Zhuang H, Chen H, Xu Y, Li X, Liu L, Xu G. MFN2 suppresses the accumulation of lipid droplets and the progression of clear cell renal cell carcinoma. Cancer Sci 2024; 115:1791-1807. [PMID: 38480904 PMCID: PMC11145141 DOI: 10.1111/cas.16151] [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: 11/09/2023] [Revised: 02/12/2024] [Accepted: 02/26/2024] [Indexed: 06/04/2024] Open
Abstract
Dissolving the lipid droplets in tissue section with alcohol during a hematoxylin and eosin (H&E) stain causes the tumor cells to appear like clear soap bubbles under a microscope, which is a key pathological feature of clear cell renal cell carcinoma (ccRCC). Mitochondrial dynamics have been reported to be closely associated with lipid metabolism and tumor development. However, the relationship between mitochondrial dynamics and lipid metabolism reprogramming in ccRCC remains to be further explored. We conducted bioinformatics analysis to identify key genes regulating mitochondrial dynamics differentially expressed between tumor and normal tissues and immunohistochemistry and Western blot to confirm. After the target was identified, we created stable ccRCC cell lines to test the impact of the target gene on mitochondrial morphology, tumorigenesis in culture cells and xenograft models, and profiles of lipid metabolism. It was found that mitofusin 2 (MFN2) was downregulated in ccRCC tissues and associated with poor prognosis in patients with ccRCC. MFN2 suppressed mitochondrial fragmentation, proliferation, migration, and invasion of ccRCC cells and growth of xenograft tumors. Furthermore, MFN2 impacted lipid metabolism and reduced the accumulation of lipid droplets in ccRCC cells. MFN2 suppressed disease progression and improved prognosis for patients with ccRCC possibly by interrupting cellular lipid metabolism and reducing accumulation of lipid droplets.
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Affiliation(s)
- Zhiduan Cai
- Department of Urology, Key Laboratory of Biological Targeting DiagnosisTherapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical UniversityGuangzhouChina
| | - Wenjun Luo
- Department of Urology, Key Laboratory of Biological Targeting DiagnosisTherapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical UniversityGuangzhouChina
| | - Haoran Wang
- Department of Urology, Key Laboratory of Biological Targeting DiagnosisTherapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical UniversityGuangzhouChina
- Guangzhou Medical UniversityGuangzhouChina
| | - Rui Zhu
- Department of Urology, Key Laboratory of Biological Targeting DiagnosisTherapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical UniversityGuangzhouChina
| | - Yaoji Yuan
- Department of Urology, Key Laboratory of Biological Targeting DiagnosisTherapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical UniversityGuangzhouChina
| | - Xiangyu Zhan
- Department of Urology, Key Laboratory of Biological Targeting DiagnosisTherapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical UniversityGuangzhouChina
| | | | - Haoquan Zhuang
- Department of Urology, Key Laboratory of Biological Targeting DiagnosisTherapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical UniversityGuangzhouChina
| | - Haoyu Chen
- Department of Urology, Key Laboratory of Biological Targeting DiagnosisTherapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical UniversityGuangzhouChina
| | - Yuyu Xu
- Department of Urology, Key Laboratory of Biological Targeting DiagnosisTherapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical UniversityGuangzhouChina
| | - Xiezhao Li
- Department of Urology, Key Laboratory of Biological Targeting DiagnosisTherapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical UniversityGuangzhouChina
| | - Leyuan Liu
- Department of Urology, Key Laboratory of Biological Targeting DiagnosisTherapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical UniversityGuangzhouChina
| | - Guibin Xu
- Department of Urology, Key Laboratory of Biological Targeting DiagnosisTherapy and Rehabilitation of Guangdong Higher Education Institutes, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical UniversityGuangzhouChina
- Guangdong Provincial Key Laboratory of UrologyThe First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical UniversityGuangzhouChina
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3
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Zou Y, Zhang Y, Li M, Cao K, Song C, Zhang Z, Cai K, Geng D, Chen S, Wu Y, Zhang N, Sun G, Wang J, Zhang Y, Sun Y. Regulation of lipid metabolism by E3 ubiquitin ligases in lipid-associated metabolic diseases. Int J Biol Macromol 2024; 265:130961. [PMID: 38508558 DOI: 10.1016/j.ijbiomac.2024.130961] [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: 07/25/2023] [Revised: 03/10/2024] [Accepted: 03/15/2024] [Indexed: 03/22/2024]
Abstract
Previous studies have progressively elucidated the involvement of E3 ubiquitin (Ub) ligases in regulating lipid metabolism. Ubiquitination, facilitated by E3 Ub ligases, modifies critical enzymes in lipid metabolism, enabling them to respond to specific signals. In this review, we aim to present a comprehensive analysis of the role of E3 Ub ligases in lipid metabolism, which includes lipid synthesis and lipolysis, and their influence on cellular lipid homeostasis through the modulation of lipid uptake and efflux. Furthermore, it explores how the ubiquitination process governs the degradation or activation of pivotal enzymes, thereby regulating lipid metabolism at the transcriptional level. Perturbations in lipid metabolism have been implicated in various diseases, including hepatic lipid metabolism disorders, atherosclerosis, diabetes, and cancer. Therefore, this review focuses on the association between E3 Ub ligases and lipid metabolism in lipid-related diseases, highlighting enzymes critically involved in lipid synthesis and catabolism, transcriptional regulators, lipid uptake translocators, and transporters. Overall, this review aims to identify gaps in current knowledge, highlight areas requiring further research, offer potential targeted therapeutic approaches, and provide a comprehensive outlook on clinical conditions associated with lipid metabolic diseases.
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Affiliation(s)
- Yuanming Zou
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Ying Zhang
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China; Institute of Health Sciences, China Medical University, 77 Puhe Road, Shenbei New District, Shenyang, 110001, Liaoning Province, People's Republic of China.
| | - Mohan Li
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Kexin Cao
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Chunyu Song
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Zhaobo Zhang
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Kexin Cai
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Danxi Geng
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Shuxian Chen
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Yanjiao Wu
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Naijin Zhang
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China; Institute of Health Sciences, China Medical University, 77 Puhe Road, Shenbei New District, Shenyang, 110001, Liaoning Province, People's Republic of China; Key Laboratory of Reproductive and Genetic Medicine (China Medical University), National Health Commission, 77 Puhe Road, Shenbei New District, Shenyang, 110001, Liaoning Province, People's Republic of China
| | - Guozhe Sun
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China.
| | - Jing Wang
- Department of Hematology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China.
| | - Yixiao Zhang
- Department of Urology Surgery, Shengjing Hospital of China Medical University, 36 Sanhao Street, Heping District, Shenyang, 110004, Liaoning Province, People's Republic of China.
| | - Yingxian Sun
- Department of Cardiology, the First Hospital of China Medical University, 155 Nanjing North Street, Heping District, Shenyang, 110001, Liaoning Province, People's Republic of China; Institute of Health Sciences, China Medical University, 77 Puhe Road, Shenbei New District, Shenyang, 110001, Liaoning Province, People's Republic of China; Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, 77 Puhe Road, Shenbei New District, Shenyang, 110001, Liaoning Province, People's Republic of China.
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4
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Luo Y, Deng X, Liao W, Huang Y, Lu C. Prognostic value of autophagy-related genes based on single-cell RNA-sequencing in colorectal cancer. Front Genet 2023; 14:1109683. [PMID: 37065476 PMCID: PMC10097963 DOI: 10.3389/fgene.2023.1109683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 03/21/2023] [Indexed: 03/31/2023] Open
Abstract
Background: Colorectal cancer (CRC) is the second most common cancer in China. Autophagy plays an important role in the initiation and development of CRC. Here, we assessed the prognostic value and potential functions of autophagy-related genes (ARGs) using integrated analysis using single-cell RNA sequencing (scRNA-seq) data from the Gene Expression Omnibus (GEO) and RNA sequencing (RNA-seq) data from The Cancer Genome Atlas (TCGA).Methods: We analyzed GEO-scRNA-seq data from GEO using various single-cell technologies, including cell clustering, and identification of differentially expressed genes (DEGs) in different cell types. Additionally, we performed gene set variation analysis (GSVA). The differentially expressed ARGs among different cell types and those between CRC and normal tissues were identified using TCGA-RNA-seq data, and the hub ARGs were screened. Finally, a prognostic model based on the hub ARGs was constructed and validated, and patients with CRC in TCGA datasets were divided into high- and low-risk groups based on their risk-score, and immune cells infiltration and drug sensitivity analyses between the two groups were performed.Results: We obtained single-cell expression profiles of 16,270 cells, and clustered them into seven types of cells. GSVA revealed that the DEGs among the seven types of cells were enriched in many signaling pathways associated with cancer development. We screened 55 differentially expressed ARGs, and identified 11 hub ARGs. Our prognostic model revealed that the 11 hub ARGs including CTSB, ITGA6, and S100A8, had a good predictive ability. Moreover, the immune cell infiltrations in CRC tissues were different between the two groups, and the hub ARGs were significantly correlated with the enrichment of immune cell infiltration. The drug sensitivity analysis revealed that the patients in the two risk groups had difference in their response to anti-cancer drugs.Conclusion: We developed a novel prognostic 11-hub ARG risk model, and these hubs may act as potential therapeutic targets for CRC.
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Affiliation(s)
- Yuqi Luo
- Department of Gastrointestinal and Hepatobiliary Surgery, Shenzhen Longhua District Central Hospital, Shenzhen, Guangdong, China
- *Correspondence: Yuqi Luo,
| | - Xuesong Deng
- Department of Hepatobiliary Surgery, Shenzhen Second People’s Hospital, The First Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong, China
| | - Weihua Liao
- Department of Radiology, Guangzhou Nansha District Maternal and Child Health Hospital, Guangzhou, Guangdong, China
| | - Yiwen Huang
- Department of Emergency, Nansha Hospital, Guangzhou First People’s Hospital, Guangzhou, Guangdong, China
| | - Caijie Lu
- Department of Gastrointestinal and Hepatobiliary Surgery, Shenzhen Longhua District Central Hospital, Shenzhen, Guangdong, China
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5
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Autophagy/Mitophagy Regulated by Ubiquitination: A Promising Pathway in Cancer Therapeutics. Cancers (Basel) 2023; 15:cancers15041112. [PMID: 36831455 PMCID: PMC9954143 DOI: 10.3390/cancers15041112] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 02/03/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023] Open
Abstract
Autophagy is essential for organismal development, maintenance of energy homeostasis, and quality control of organelles and proteins. As a selective form of autophagy, mitophagy is necessary for effectively eliminating dysfunctional mitochondria. Both autophagy and mitophagy are linked with tumor progression and inhibition. The regulation of mitophagy and autophagy depend upon tumor type and stage. In tumors, mitophagy has dual roles: it removes damaged mitochondria to maintain healthy mitochondria and energy production, which are necessary for tumor growth. In contrast, mitophagy has been shown to inhibit tumor growth by mitigating excessive ROS production, thus preventing mutation and chromosomal instability. Ubiquitination and deubiquitination are important modifications that regulate autophagy. Multiple E3 ubiquitin ligases and DUBs modulate the activity of the autophagy and mitophagy machinery, thereby influencing cancer progression. In this review, we summarize the mechanistic association between cancer development and autophagy/mitophagy activities regulated by the ubiquitin modification of autophagic proteins. In addition, we discuss the function of multiple proteins involved in autophagy/mitophagy in tumors that may represent potential therapeutic targets.
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6
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Rinaldi L, Senatore E, Iannucci R, Chiuso F, Feliciello A. Control of Mitochondrial Activity by the Ubiquitin Code in Health and Cancer. Cells 2023; 12:234. [PMID: 36672167 PMCID: PMC9856579 DOI: 10.3390/cells12020234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/27/2022] [Accepted: 01/03/2023] [Indexed: 01/06/2023] Open
Abstract
Cellular homeostasis is tightly connected to the broad variety of mitochondrial functions. To stay healthy, cells need a constant supply of nutrients, energy production and antioxidants defenses, undergoing programmed death when a serious, irreversible damage occurs. The key element of a functional integration of all these processes is the correct crosstalk between cell signaling and mitochondrial activities. Once this crosstalk is interrupted, the cell is not able to communicate its needs to mitochondria, resulting in oxidative stress and development of pathological conditions. Conversely, dysfunctional mitochondria may affect cell viability, even in the presence of nutrients supply and energy production, indicating the existence of feed-back control mechanisms between mitochondria and other cellular compartments. The ubiquitin proteasome system (UPS) is a multi-step biochemical pathway that, through the conjugation of ubiquitin moieties to specific protein substrates, controls cellular proteostasis and signaling, removing damaged or aged proteins that might otherwise accumulate and affect cell viability. In response to specific needs or changed extracellular microenvironment, the UPS modulates the turnover of mitochondrial proteins, thus influencing the organelle shape, dynamics and function. Alterations of the dynamic and reciprocal regulation between mitochondria and UPS underpin genetic and proliferative disorders. This review focuses on the mitochondrial metabolism and activities supervised by UPS and examines how deregulation of this control mechanism results in proliferative disorders and cancer.
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Affiliation(s)
| | | | | | | | - Antonio Feliciello
- Department of Molecular Medicine and Medical Biotechnology, University of Naples, 80131 Naples, Italy
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7
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Tang F, Tang Z, Lu Z, Cai Y, Lai Y, Mai Y, Li Z, Lu Z, Zhang J, Li Z, He Z. A novel autophagy-related long non-coding RNAs prognostic risk score for clear cell renal cell carcinoma. BMC Urol 2022; 22:203. [PMID: 36496360 PMCID: PMC9741795 DOI: 10.1186/s12894-022-01148-8] [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: 04/02/2022] [Accepted: 11/08/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND As the main histological subtype of renal cell carcinoma, clear cell renal cell carcinoma (ccRCC) places a heavy burden on health worldwide. Autophagy-related long non-coding RNAs (ARlncRs) have shown tremendous potential as prognostic signatures in several studies, but the relationship between them and ccRCC still has to be demonstrated. METHODS The RNA-sequencing and clinical characteristics of 483 ccRCC patients were downloaded download from the Cancer Genome Atlas and International Cancer Genome Consortium. ARlncRs were determined by Pearson correlation analysis. Univariate and multivariate Cox regression analyses were applied to establish a risk score model. A nomogram was constructed considering independent prognostic factors. The Harrell concordance index calibration curve and the receiver operating characteristic analysis were utilized to evaluate the nomogram. Furthermore, functional enrichment analysis was used for differentially expressed genes between the two groups of high- and low-risk scores. RESULTS A total of 9 SARlncRs were established as a risk score model. The Kaplan-Meier survival curve, principal component analysis, and subgroup analysis showed that low overall survival of patients was associated with high-risk scores. Age, M stage, and risk score were identified as independent prognostic factors to establish a nomogram, whose concordance index in the training cohort, internal validation, and external ICGC cohort was 0.793, 0.671, and 0.668 respectively. The area under the curve for 5-year OS prediction in the training cohort, internal validation, and external ICGC cohort was 0.840, 0.706, and 0.708, respectively. GO analysis and KEGG analysis of DEGs demonstrated that immune- and inflammatory-related pathways are likely to be critically involved in the progress of ccRCC. CONCLUSIONS We established and validated a novel ARlncRs prognostic risk model which is valuable as a potential therapeutic target and prognosis indicator for ccRCC. A nomogram including the risk model is a promising clinical tool for outcomes prediction of ccRCC patients and further formulation of individualized strategy.
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Affiliation(s)
- Fucai Tang
- grid.12981.330000 0001 2360 039XDepartment of Urology, The Eighth Affiliated Hospital, Sun Yat-Sen University, No. 3025, Shennan Zhong Road, Shenzhen, 518033 China
| | - Zhicheng Tang
- grid.410737.60000 0000 8653 1072The Third Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436 Guangdong China
| | - Zechao Lu
- grid.12981.330000 0001 2360 039XDepartment of Urology, The Eighth Affiliated Hospital, Sun Yat-Sen University, No. 3025, Shennan Zhong Road, Shenzhen, 518033 China
| | - Yueqiao Cai
- grid.410737.60000 0000 8653 1072The First Clinical College of Guangzhou Medical University, Guangzhou, 511436 Guangdong China
| | - Yongchang Lai
- grid.12981.330000 0001 2360 039XDepartment of Urology, The Eighth Affiliated Hospital, Sun Yat-Sen University, No. 3025, Shennan Zhong Road, Shenzhen, 518033 China
| | - Yuexue Mai
- grid.410737.60000 0000 8653 1072The Sixth Clinical College of Guangzhou Medical University, Guangzhou, 511436 Guangdong China
| | - Zhibiao Li
- grid.12981.330000 0001 2360 039XDepartment of Urology, The Eighth Affiliated Hospital, Sun Yat-Sen University, No. 3025, Shennan Zhong Road, Shenzhen, 518033 China
| | - Zeguang Lu
- grid.410737.60000 0000 8653 1072The Second Clinical College of Guangzhou Medical University, Guangzhou, 511436 Guangdong China
| | - Jiahao Zhang
- grid.410737.60000 0000 8653 1072The Sixth Clinical College of Guangzhou Medical University, Guangzhou, 511436 Guangdong China
| | - Ze Li
- grid.410737.60000 0000 8653 1072The First Clinical College of Guangzhou Medical University, Guangzhou, 511436 Guangdong China
| | - Zhaohui He
- grid.12981.330000 0001 2360 039XDepartment of Urology, The Eighth Affiliated Hospital, Sun Yat-Sen University, No. 3025, Shennan Zhong Road, Shenzhen, 518033 China
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8
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Huang Q, Li J, Chen J, Zhang Z, Xu P, Qi H, Chen Z, Liu J, Lu J, Shi M, Zhang Y, Ma Y, Zhao D, Li X. Ginsenoside compound K protects against cerebral ischemia/reperfusion injury via Mul1/Mfn2-mediated mitochondrial dynamics and bioenergy. J Ginseng Res 2022; 47:408-419. [DOI: 10.1016/j.jgr.2022.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 09/15/2022] [Accepted: 10/11/2022] [Indexed: 02/09/2023] Open
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9
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CYP27A1 inhibits proliferation and migration of clear cell renal cell carcinoma via activation of LXRs/ABCA1. Exp Cell Res 2022; 419:113279. [PMID: 35810773 DOI: 10.1016/j.yexcr.2022.113279] [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: 02/11/2022] [Revised: 07/05/2022] [Accepted: 07/05/2022] [Indexed: 11/22/2022]
Abstract
Cholesterol homeostasis plays an important role in the maintenance of normal body functions. CYP27A1 is a key enzyme known to regulate cholesterol homeostasis, which catalyzes the conversion of cholesterol to 27-HC and has been implicated in the occurrence and metastasis of various cancer types. The present study aimed to explore the regulatory role of CYP27A1 in the development of clear cell renal cell carcinoma (ccRCC). In particular, the effect of CYP27A1 on the proliferation and migration of ccRCC cells was investigated. The construction of a stable 786-O cell line overexpressing CYP27A1/pLVX was mediated by lentiviral infection. The proliferative capacity was assessed using MTT and colony formation. Wound healing assay was used to measure cell migration. Production of intracellular cholesterol and 27-HC was detected by enzyme-linked immunosorbent assay. The LXRs/ABCA1 pathway of cholesterol metabolism regulation was studied by RT-qPCR and Western blotting analysis after cells were treated with stimulation agents of 27-HC or T0901317 and inhibition agents of siRNA or GSK2033. The results revealed that overexpression of CYP27A1 could increase the intracellular production of 27-HC and inhibit the proliferation and migration of 786-O cells. And the treatment of 786-O cells with 27-HC induced a similar effect. CYP27A1/27HC mediated activation of the liver X receptors (LXRs) could up-regulate the expression of ATP-binding cassette transporter A1 (ABCA1), further resulting in the reduction of intracellular cholesterol contents. All of these findings indicated a regulatory role of CYP27A1 in the proliferation and migration of ccRCC, via activating LXRs/ABCA1 to regulate cholesterol homeostasis.
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10
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Calle X, Garrido-Moreno V, Lopez-Gallardo E, Norambuena-Soto I, Martínez D, Peñaloza-Otárola A, Troncossi A, Guerrero-Moncayo A, Ortega A, Maracaja-Coutinho V, Parra V, Chiong M, Lavandero S. Mitochondrial E3 ubiquitin ligase 1 (MUL1) as a novel therapeutic target for diseases associated with mitochondrial dysfunction. IUBMB Life 2022; 74:850-865. [PMID: 35638168 DOI: 10.1002/iub.2657] [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] [Received: 01/03/2022] [Accepted: 05/17/2022] [Indexed: 11/07/2022]
Abstract
Mitochondrial E3 ubiquitin ligase 1 (MUL1) is a mitochondrial outer membrane-anchored protein-containing transmembrane domain in its N- and C-terminal regions, where both are exposed to the cytosol. Interestingly the C-terminal region has a RING finger domain responsible for its E3 ligase activity, as ubiquitin or in SUMOylation, interacting with proteins related to mitochondrial fusion and fission, cell survival, and tumor suppressor process, such as Akt. Therefore, MUL1 is involved in various cellular processes, such as mitochondrial dynamics, inter-organelle communication, proliferation, mitophagy, immune response, inflammation and cell apoptosis. MUL1 is expressed at a higher basal level in the heart, immune system organs, and blood. Here, we discuss the role of MUL1 in mitochondrial dynamics and its function in various pathological models, both in vitro and in vivo. In this context, we describe the role of MUL1 in: (1) the inflammatory response, by regulating NF-κB activity; (2) cancer, by promoting cell death and regulating exonuclear function of proteins, such as p53; (3) neurological diseases, by maintaining communication with other organelles and interacting with proteins to eliminate damaged organelles and; (4) cardiovascular diseases, by maintaining mitochondrial fusion/fission homeostasis. In this review, we summarize the latest advances in the physiological and pathological functions of MUL1. We also describe the different substrates of MUL1, acting as a positive or negative regulator in various pathologies associated with mitochondrial dysfunction. In conclusion, MUL1 could be a potential key target for the development of therapies that focus on ensuring the functionality of the mitochondrial network and, furthermore, the quality control of intracellular components by synchronously modulating the activity of different cellular mechanisms involved in the aforementioned pathologies. This, in turn, will guide the development of targeted therapies.
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Affiliation(s)
- Ximena Calle
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical & Pharmaceutical Sciences and Faculty of Medicine, University of Chile, Santiago, Chile
| | - Valeria Garrido-Moreno
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical & Pharmaceutical Sciences and Faculty of Medicine, University of Chile, Santiago, Chile
| | - Erik Lopez-Gallardo
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical & Pharmaceutical Sciences and Faculty of Medicine, University of Chile, Santiago, Chile
| | - Ignacio Norambuena-Soto
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical & Pharmaceutical Sciences and Faculty of Medicine, University of Chile, Santiago, Chile
| | - Daniela Martínez
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical & Pharmaceutical Sciences and Faculty of Medicine, University of Chile, Santiago, Chile
| | - Allan Peñaloza-Otárola
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical & Pharmaceutical Sciences and Faculty of Medicine, University of Chile, Santiago, Chile
| | - Angelo Troncossi
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical & Pharmaceutical Sciences and Faculty of Medicine, University of Chile, Santiago, Chile
| | - Alejandra Guerrero-Moncayo
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical & Pharmaceutical Sciences and Faculty of Medicine, University of Chile, Santiago, Chile
| | - Angélica Ortega
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical & Pharmaceutical Sciences and Faculty of Medicine, University of Chile, Santiago, Chile
| | - Vinicius Maracaja-Coutinho
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical & Pharmaceutical Sciences and Faculty of Medicine, University of Chile, Santiago, Chile
| | - Valentina Parra
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical & Pharmaceutical Sciences and Faculty of Medicine, University of Chile, Santiago, Chile
| | - Mario Chiong
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical & Pharmaceutical Sciences and Faculty of Medicine, University of Chile, Santiago, Chile
| | - Sergio Lavandero
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical & Pharmaceutical Sciences and Faculty of Medicine, University of Chile, Santiago, Chile.,Corporación Centro de Estudios Científicos de las Enfermedades Crónicas (CECEC), Santiago, Chile.,Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA
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11
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Li X, Zhu R, Yuan Y, Cai Z, Liang S, Bian J, Xu G. Double-stranded RNA-specific adenosine deaminase-knockdown inhibits the proliferation and induces apoptosis of DU145 and PC3 cells by promoting the phosphorylation of H2A.X variant histone. Oncol Lett 2021; 22:764. [PMID: 34589143 PMCID: PMC8442165 DOI: 10.3892/ol.2021.13025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 07/28/2021] [Indexed: 02/06/2023] Open
Abstract
Double-stranded RNA-specific adenosine deaminase (ADAR1) is a member of the adenosine deaminases acting on RNA family that catalyze the adenosine-to-inosine editing of double-stranded RNA substrates. Several studies have reported that ADAR1 is closely associated with numerous malignancies. However, the functional roles of ADAR1 in prostate cancer (PCa) have not been fully elucidated. Thus, the present study aimed to investigate the effects of ADAR1 on PCa. The results demonstrated that ADAR1 was highly expressed in PCa tissues compared with normal tissues. Furthermore, the protein expression level of ADAR1 was significantly increased in castration-resistant PCa (CRPCa) tissues and CRPCa cell lines. Thus, these findings indicated that ADAR1 may act as a tumor promoter for PCa development. Next, the potential effects of ADAR1-knockdown on the proliferation of DU145 and PC3 cells were investigated. ADAR1 was knocked down via small interfering RNA transfection, which was found to exert antitumor effects on DU145 and PC3 cells at 24 and 48 h post transfection. Furthermore, a significant positive association was observed between ADAR1-knockdown and the apoptosis of DU145 and PC3 cells, which increased the phosphorylation of H2A.X variant histone. The results of the present study indicated a positive association between ADAR1 expression and PCa, which may promote the development of CRPCa. Moreover, ADAR1-knockdown may serve as a tumor suppressor and represent a potential target for the treatment of PCa.
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Affiliation(s)
- Xiezhao Li
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510700, P.R. China
| | - Rui Zhu
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510700, P.R. China
| | - Yaoji Yuan
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510700, P.R. China
| | - Zhiduan Cai
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510700, P.R. China
| | - Siyang Liang
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510700, P.R. China
| | - Jun Bian
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510700, P.R. China
| | - Guibin Xu
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510700, P.R. China
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12
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Liang L, Yang Z, Deng Q, Jiang Y, Cheng Y, Sun Y, Li L. miR-30d-5p suppresses proliferation and autophagy by targeting ATG5 in renal cell carcinoma. FEBS Open Bio 2020; 11:529-540. [PMID: 33145996 PMCID: PMC7876493 DOI: 10.1002/2211-5463.13025] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 06/29/2020] [Accepted: 11/02/2020] [Indexed: 12/13/2022] Open
Abstract
Previous reports have shown that miR-30d-5p functions as a tumor suppressor in prostate cancer and gallbladder carcinoma, but its role in renal cell carcinoma (RCC) remains elusive. This study was designed to explore the functional role of miR-30d-5p in proliferation and autophagy of RCC. Our results show that miR-30d-5p is significantly down-regulated in RCC tissues compared with normal tissues. miR-30d-5p overexpression suppressed cell proliferation, cell-cycle G1/S transition and autophagy, but promoted apoptosis in RCC cell lines (786-O and ACHN). Intriguingly, autophagy-related gene 5 (ATG5) was directly targeted by miR-30d-5p, as shown using luciferase reporter assay and biotin-avidin pull-down assay. Moreover, overexpression of ATG5 attenuated the inhibitory effect of miR-30d-5p on proliferation and autophagy in 786-O cells. These results suggest that miR-30d-5p suppresses proliferation and autophagy in RCC cells by targeting ATG5, and this pathway may be a suitable basis for the design of novel cancer therapeutics.
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Affiliation(s)
- Liang Liang
- Department of UrologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityChina,Medical College of Xi'an Jiao Tong UniversityChina
| | - Zheng Yang
- Department of UrologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityChina
| | - Qian Deng
- Department of UrologyShaanxi Provincial People's HospitalXi'anChina,Department of UrologyThe Third Affiliated Hospital of Xi'an Jiaotong UniversityChina
| | - Yazhuo Jiang
- Department of UrologyShaanxi Provincial People's HospitalXi'anChina,Department of UrologyThe Third Affiliated Hospital of Xi'an Jiaotong UniversityChina
| | - Yongyi Cheng
- Department of UrologyShaanxi Provincial People's HospitalXi'anChina,Department of UrologyThe Third Affiliated Hospital of Xi'an Jiaotong UniversityChina
| | - Yi Sun
- Department of UrologyShaanxi Provincial People's HospitalXi'anChina,Department of UrologyThe Third Affiliated Hospital of Xi'an Jiaotong UniversityChina
| | - Lei Li
- Department of UrologyThe First Affiliated Hospital of Xi'an Jiaotong UniversityChina
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13
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Bacigalupa ZA, Rathmell WK. Beyond glycolysis: Hypoxia signaling as a master regulator of alternative metabolic pathways and the implications in clear cell renal cell carcinoma. Cancer Lett 2020; 489:19-28. [PMID: 32512023 PMCID: PMC7429250 DOI: 10.1016/j.canlet.2020.05.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 05/17/2020] [Accepted: 05/22/2020] [Indexed: 12/12/2022]
Abstract
The relationship between kidney cancer, specifically clear cell renal cell carcinoma (ccRCC), and the hypoxia signaling program has been extensively characterized. Its underlying role as the primary driver of the disease has led to the development of the most effective targeted therapies to date. Cellular responses to hypoxia or mutations affecting the von Hippel-Lindau (VHL) tumor suppressor gene stabilize the hypoxia inducible factor (HIF) transcription factors which then orchestrate elaborate downstream signaling events resulting in adaptations to key biological processes, such as reprogramming metabolism. The direct link of hypoxia signaling to glucose uptake and glycolysis has long been appreciated; however, the HIF family of proteins directly regulate many downstream targets, including other transcription factors with their own extensive networks. In this review, we will summarize our current understanding of how hypoxia signaling regulates other metabolic pathways and how this contributes to the development and progression of clear cell renal cell carcinomas.
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Affiliation(s)
- Zachary A Bacigalupa
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - W Kimryn Rathmell
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, 37232, USA.
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14
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Chen M, Zhang S, Nie Z, Wen X, Gao Y. Identification of an Autophagy-Related Prognostic Signature for Clear Cell Renal Cell Carcinoma. Front Oncol 2020; 10:873. [PMID: 32547955 PMCID: PMC7274034 DOI: 10.3389/fonc.2020.00873] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 05/04/2020] [Indexed: 12/23/2022] Open
Abstract
Abnormal autophagy is closely related to the development of cancer. Many studies have demonstrated that autophagy plays an important role in biological function in clear cell renal cell carcinoma (ccRCC). This study aimed to construct a prognostic signature for ccRCC based on autophagy-related genes (ARGs) to predict the prognosis of ccRCC. Differentially expressed ARGs were obtained from ccRCC RNA-seq data in The Cancer Genome Atlas (TCGA) database. ARGs were enriched by gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG). The prognostic ARGs used to construct the risk score models for overall survival (OS) and disease-free survival (DFS) were identified by Cox regression analyses. According to the median value of the risk score, patients were divided into a high-risk group and a low-risk group. The OS and DFS were analyzed by the Kaplan-Meier method. The predictive accuracy was determined by a receiver operating characteristic (ROC) curve analysis. Additionally, we performed stratification analyses based on different clinical variables and evaluated the correlation between the risk score and the clinical variables. The differentially expressed ARGs were mainly enriched in the platinum drug resistance pathway. The prognostic signatures based on 11 ARGs for OS and 5 ARGs for DFS were constructed and showed that the survive time was significantly shorter in the high-risk group than in the low-risk group (P < 0.001). The ROC curve for OS exhibited good predictive accuracy, with an area under the curve value of 0.738. In the stratification analyses, the OS time of the high-risk group was shorter than that of the low-risk group stratified by different clinical variables. In conclusion, an autophagy-related signature for OS we constructed can independently predict the prognosis of ccRCC patient, and provide a deep understanding of the potential biological mechanisms of autophagy in ccRCC.
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Affiliation(s)
- Mei Chen
- Central Laboratory, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, Haikou, China
| | - Shufang Zhang
- Central Laboratory, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, Haikou, China
| | - Zhenyu Nie
- Central Laboratory, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, Haikou, China
| | - Xiaohong Wen
- Central Laboratory, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, Haikou, China
| | - Yuanhui Gao
- Central Laboratory, Affiliated Haikou Hospital of Xiangya Medical College, Central South University, Haikou, China
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15
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Schiavi A, Strappazzon F, Ventura N. Mitophagy and iron: two actors sharing the stage in age-associated neuronal pathologies. Mech Ageing Dev 2020; 188:111252. [PMID: 32330468 DOI: 10.1016/j.mad.2020.111252] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 04/14/2020] [Accepted: 04/15/2020] [Indexed: 12/12/2022]
Abstract
Aging is characterized by the deterioration of different cellular and organismal structures and functions. A typical hallmark of the aging process is the accumulation of dysfunctional mitochondria and excess iron, leading to a vicious cycle that promotes cell and tissue damage, which ultimately contribute to organismal aging. Accordingly, altered mitochondrial quality control pathways such as mitochondrial autophagy (mitophagy) as well as altered iron homeostasis, with consequent iron overload, can accelerate the aging process and the development and progression of different age-associated disorders. In this review we first briefly introduce the aging process and summarize molecular mechanisms regulating mitophagy and iron homeostasis. We then provide an overview on how dysfunction of these two processes impact on aging and age-associated neurodegenerative disorders with a focus on Alzheimer's disease, Parkinson's disease and Amyotrophic Lateral Sclerosis. Finally, we summarize some recent evidence showing mechanistic links between iron metabolism and mitophagy and speculate on how regulating the crosstalk between the two processes may provide protective effects against aging and age-associated neuronal pathologies.
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Affiliation(s)
- Alfonso Schiavi
- Institute of Clinical Chemistry and Laboratory Diagnostic, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany; IUF- Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
| | | | - Natascia Ventura
- Institute of Clinical Chemistry and Laboratory Diagnostic, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany; IUF- Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany.
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16
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Cong L, Gao Z, Zheng Y, Ye T, Wang Z, Wang P, Li M, Dong B, Yang W, Li Q, Qiao S, Wang C, Shen Y, Li H, Tian W, Yang L. Electrical stimulation inhibits Val-boroPro-induced pyroptosis in THP-1 macrophages via sirtuin3 activation to promote autophagy and inhibit ROS generation. Aging (Albany NY) 2020; 12:6415-6435. [PMID: 32289749 PMCID: PMC7185124 DOI: 10.18632/aging.103038] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 03/04/2020] [Indexed: 12/19/2022]
Abstract
The incidence of atherosclerosis (AS), a major contributor to cardiovascular disease, is steadily rising along with an increasingly older population worldwide. Pyroptosis, a form of inflammatory programmed cell death, determines the release of pro-inflammatory mediators by endothelial cells, smooth muscle cells, and atheroma-associated macrophages and foam cells, thereby playing a critical role in AS progression. Canonical pyroptosis is mediated by inflammasome formation, activation of caspase-1, and maturation and release of proinflammatory cytokines. Electrical stimulation (ES) is a noninvasive, safe therapy that has been shown to alleviate symptoms in several health conditions. Here, we investigated the anti-inflammatory and anti-pyroptotic effects of ES in human THP-1 macrophages treated with the dipeptidyl peptidase inhibitor Val-boroPro (VbP). We found that ES downregulated NOD-like receptor family protein 3 (NLRP3) inflammasome, ASC, and caspase-1 expression and abrogated the release of Interleukin-1β (IL-1β) and Interleukin-18 (IL-18), indicating effective pyroptosis inhibition. These changes were paralleled by a reduction in reactive oxygen species (ROS) production, reversal of VbP-induced sirtuin3 (Sirt3) downregulation, deacetylation of ATG5, and induction of autophagy. These findings suggest that ES may be a viable strategy to counteract pyroptosis-mediated inflammation in AS by raising Sirt3 to promote autophagy and inhibit ROS generation.
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Affiliation(s)
- Lin Cong
- Department of Pathophysiology, Basic Medical Science, Harbin Medical University, Harbin 150081, China
| | - Ziyu Gao
- Department of Pathophysiology, Basic Medical Science, Harbin Medical University, Harbin 150081, China
| | - Yinghong Zheng
- Department of Pathophysiology, Basic Medical Science, Harbin Medical University, Harbin 150081, China
| | - Ting Ye
- Department of Pathophysiology, Basic Medical Science, Harbin Medical University, Harbin 150081, China
| | - Zitong Wang
- Department of Pathophysiology, Basic Medical Science, Harbin Medical University, Harbin 150081, China
| | - Pengyu Wang
- Department of Pathophysiology, Basic Medical Science, Harbin Medical University, Harbin 150081, China
| | - Manman Li
- Department of Pathophysiology, Basic Medical Science, Harbin Medical University, Harbin 150081, China
| | - Bowen Dong
- Department of Pathophysiology, Basic Medical Science, Harbin Medical University, Harbin 150081, China
| | - Wei Yang
- Department of Pathophysiology, Basic Medical Science, Harbin Medical University, Harbin 150081, China
| | - Quanfeng Li
- Department of Pathophysiology, Basic Medical Science, Harbin Medical University, Harbin 150081, China
| | - Shupei Qiao
- School of Life Science and Technology, Harbin Institute of Technology, Harbin 150006, China
| | - Cao Wang
- School of Life Science and Technology, Harbin Institute of Technology, Harbin 150006, China
| | - Yijun Shen
- School of Life Science and Technology, Harbin Institute of Technology, Harbin 150006, China
| | - Hong Li
- Department of Pathophysiology, Basic Medical Science, Harbin Medical University, Harbin 150081, China
| | - Weiming Tian
- School of Life Science and Technology, Harbin Institute of Technology, Harbin 150006, China
| | - Liming Yang
- Department of Pathophysiology, Basic Medical Science, Harbin Medical University, Harbin 150081, China.,State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Beijing 100037, China
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17
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Yuan Y, Li X, Xu Y, Zhao H, Su Z, Lai D, Yang W, Chen S, He Y, Li X, Liu L, Xu G. Mitochondrial E3 ubiquitin ligase 1 promotes autophagy flux to suppress the development of clear cell renal cell carcinomas. Cancer Sci 2019; 110:3533-3542. [PMID: 31489722 PMCID: PMC6825007 DOI: 10.1111/cas.14192] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 08/29/2019] [Accepted: 09/02/2019] [Indexed: 02/07/2023] Open
Abstract
Clear cell renal cell carcinoma (ccRCC) is one of the most common malignant tumors in the urinary system. Surgical intervention is the preferred treatment for ccRCC, but targeted biological therapy is required for postoperative recurrent or metastatic ccRCC. Autophagy is an intracellular degradation system for misfolded/aggregated proteins and dysfunctional organelles. Defective autophagy is associated with many diseases. Mul1 is a mitochondrion-associated E3 ubiquitin ligase and involved in the regulation of divergent pathophysiological processes such as mitochondrial dynamics, and thus affects the development of various diseases including cancers. Whether Mul1 regulates ccRCC development and what is the mechanism remain unclear. Histochemical staining and immunoblotting were used to analyze the levels of Mul1 protein in human renal tissues. Statistical analysis of information associated with tissue microarray and The Cancer Genome Atlas (TCGA) database was conducted to show the relationship between Mul1 expression and clinical features and survival of ccRCC patients. Impact of Mul1 on rates of cell growth and migration and autophagy flux were tested in cultured cancer cells. Herein we show that Mul1 promoted autophagy flux to facilitate the degradation of P62-associated protein aggresomes and adipose differentiation-related protein (ADFP)-associated lipid droplets and suppressed the growth and migration of ccRCC cells. Levels of Mul1 protein and mRNA were significantly reduced so that autophagy flux was likely blocked in ccRCC tissues, which is potentially correlated with enhancement of malignancy of ccRCC and impairment of patient survival. Therefore, Mul1 may promote autophagy to suppress the development of ccRCC.
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Affiliation(s)
- Yaoji Yuan
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xiezhao Li
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yuyu Xu
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Haibo Zhao
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Zhengming Su
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Dehui Lai
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Weiqing Yang
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Shuangxing Chen
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yongzhong He
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xun Li
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Center for the Innovation and Translation of Minimally Invasive Techniques, Guangzhou Medical University, Guangzhou, China
| | - Leyuan Liu
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Institute of Biosciences and Technology, Texas A&M University, Houston, TX, USA.,Department of Molecular and Cellular Medicine, College of Medicine, Texas A&M University, College Station, TX, USA
| | - Guibin Xu
- Department of Urology, The Fifth Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Center for the Innovation and Translation of Minimally Invasive Techniques, Guangzhou Medical University, Guangzhou, China
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