1
|
Feng J, Ye S, Hai B, Lou Y, Duan M, Guo P, Lv P, Lu W, Chen Y. RNF115/BCA2 deficiency alleviated acute liver injury in mice by promoting autophagy and inhibiting inflammatory response. Cell Death Dis 2023; 14:855. [PMID: 38129372 PMCID: PMC10739886 DOI: 10.1038/s41419-023-06379-7] [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: 04/17/2023] [Revised: 11/30/2023] [Accepted: 12/06/2023] [Indexed: 12/23/2023]
Abstract
The E3 ubiquitin ligase RING finger protein 115 (RNF115), also known as breast cancer-associated gene 2 (BCA2), has been linked with the growth of some cancers and immune regulation, which is negatively correlated with prognosis. Here, it is demonstrated that the RNF115 deletion can protect mice from acute liver injury (ALI) induced by the treatment of lipopolysaccharide (LPS)/D-galactosamine (D-GalN), as evidenced by decreased levels of alanine aminotransaminase, aspartate transaminase, inflammatory cytokines (e.g., tumor necrosis factor α and interleukin-6), chemokines (e.g., MCP1/CCL2) and inflammatory cell (e.g., monocytes and neutrophils) infiltration. Moreover, it was found that the autophagy activity in Rnf115-/- livers was increased, which resulted in the removal of damaged mitochondria and hepatocyte apoptosis. However, the administration of adeno-associated virus Rnf115 or autophagy inhibitor 3-MA impaired autophagy and aggravated liver injury in Rnf115-/- mice with ALI. Further experiments proved that RNF115 interacts with LC3B, downregulates LC3B protein levels and cell autophagy. Additionally, Rnf115 deletion inhibited M1 type macrophage activation via NF-κB and Jnk signaling pathways. Elimination of macrophages narrowed the difference in liver damage between Rnf115+/+ and Rnf115-/- mice, indicating that macrophages were linked in the ALI induced by LPS/D-GalN. Collectively, for the first time, we have proved that Rnf115 inactivation ameliorated LPS/D-GalN-induced ALI in mice by promoting autophagy and attenuating inflammatory responses. This study provides new evidence for the involvement of autophagy mechanisms in the protection against acute liver injury.
Collapse
Affiliation(s)
- Jinqiu Feng
- Department of Immunology, Peking University School of Basic Medical Sciences; NHC Key Laboratory of Medical Immunology, Peking University, 38 Xueyuan Road, Beijing, 100191, China
| | - Shufang Ye
- Department of Immunology, Peking University School of Basic Medical Sciences; NHC Key Laboratory of Medical Immunology, Peking University, 38 Xueyuan Road, Beijing, 100191, China
| | - Bao Hai
- Department of Orthopedics, Peking University Third Hospital, 49 North Garden Road, Beijing, 100191, China
| | - Yaxin Lou
- Medical and Healthy Analytical Center, Peking University, 38 Xueyuan Road, Beijing, 100191, China
| | - Mengyuan Duan
- Department of Immunology, Peking University School of Basic Medical Sciences; NHC Key Laboratory of Medical Immunology, Peking University, 38 Xueyuan Road, Beijing, 100191, China
| | - Pengli Guo
- Department of Immunology, Peking University School of Basic Medical Sciences; NHC Key Laboratory of Medical Immunology, Peking University, 38 Xueyuan Road, Beijing, 100191, China
| | - Ping Lv
- Department of Immunology, Peking University School of Basic Medical Sciences; NHC Key Laboratory of Medical Immunology, Peking University, 38 Xueyuan Road, Beijing, 100191, China
| | - Wenping Lu
- Department of Hepatobiliary Surgery, First Medical Center, Chinese PLA General Hospital, 28 Fuxing Road, Beijing, 100853, China.
| | - Yingyu Chen
- Department of Immunology, Peking University School of Basic Medical Sciences; NHC Key Laboratory of Medical Immunology, Peking University, 38 Xueyuan Road, Beijing, 100191, China.
- Center for Human Disease Genomics, Peking University, 38 Xueyuan Road, Beijing, 100191, China.
| |
Collapse
|
2
|
Bilkei‐Gorzo O, Heunis T, Marín‐Rubio JL, Cianfanelli FR, Raymond BBA, Inns J, Fabrikova D, Peltier J, Oakley F, Schmid R, Härtlova A, Trost M. The E3 ubiquitin ligase RNF115 regulates phagosome maturation and host response to bacterial infection. EMBO J 2022; 41:e108970. [PMID: 36281581 PMCID: PMC9713710 DOI: 10.15252/embj.2021108970] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 10/01/2022] [Accepted: 10/06/2022] [Indexed: 01/15/2023] Open
Abstract
Phagocytosis is a key process in innate immunity and homeostasis. After particle uptake, newly formed phagosomes mature by acquisition of endolysosomal enzymes. Macrophage activation by interferon gamma (IFN-γ) increases microbicidal activity, but delays phagosomal maturation by an unknown mechanism. Using quantitative proteomics, we show that phagosomal proteins harbour high levels of typical and atypical ubiquitin chain types. Moreover, phagosomal ubiquitylation of vesicle trafficking proteins is substantially enhanced upon IFN-γ activation of macrophages, suggesting a role in regulating phagosomal functions. We identified the E3 ubiquitin ligase RNF115, which is enriched on phagosomes of IFN-γ activated macrophages, as an important regulator of phagosomal maturation. Loss of RNF115 protein or ligase activity enhanced phagosomal maturation and increased cytokine responses to bacterial infection, suggesting that both innate immune signalling from the phagosome and phagolysosomal trafficking are controlled through ubiquitylation. RNF115 knock-out mice show less tissue damage in response to S. aureus infection, indicating a role of RNF115 in inflammatory responses in vivo. In conclusion, RNF115 and phagosomal ubiquitylation are important regulators of innate immune functions during bacterial infections.
Collapse
Affiliation(s)
- Orsolya Bilkei‐Gorzo
- Wallenberg Centre for Molecular and Translational Medicine, Department of Microbiology and Immunology at Institute of BiomedicineUniversity of GothenburgGothenburgSweden,MRC Protein Phosphorylation and Ubiquitylation UnitUniversity of DundeeDundeeUK
| | - Tiaan Heunis
- Biosciences InstituteNewcastle UniversityNewcastle upon TyneUK
| | | | | | | | - Joseph Inns
- Biosciences InstituteNewcastle UniversityNewcastle upon TyneUK
| | - Daniela Fabrikova
- Wallenberg Centre for Molecular and Translational Medicine, Department of Microbiology and Immunology at Institute of BiomedicineUniversity of GothenburgGothenburgSweden
| | - Julien Peltier
- MRC Protein Phosphorylation and Ubiquitylation UnitUniversity of DundeeDundeeUK,Biosciences InstituteNewcastle UniversityNewcastle upon TyneUK
| | - Fiona Oakley
- Biosciences InstituteNewcastle UniversityNewcastle upon TyneUK,Newcastle Fibrosis Research GroupNewcastle UniversityNewcastle upon TyneUK
| | - Ralf Schmid
- Leicester Institute of Structural and Chemical BiologyUniversity of LeicesterLeicesterUK,Department of Molecular and Cell BiologyUniversity of LeicesterLeicesterUK
| | - Anetta Härtlova
- Wallenberg Centre for Molecular and Translational Medicine, Department of Microbiology and Immunology at Institute of BiomedicineUniversity of GothenburgGothenburgSweden,MRC Protein Phosphorylation and Ubiquitylation UnitUniversity of DundeeDundeeUK,Biosciences InstituteNewcastle UniversityNewcastle upon TyneUK
| | - Matthias Trost
- MRC Protein Phosphorylation and Ubiquitylation UnitUniversity of DundeeDundeeUK,Biosciences InstituteNewcastle UniversityNewcastle upon TyneUK
| |
Collapse
|
3
|
The Systematic Analyses of RING Finger Gene Signature for Predicting the Prognosis of Patients with Hepatocellular Carcinoma. JOURNAL OF ONCOLOGY 2022; 2022:2466006. [PMID: 36199791 PMCID: PMC9529411 DOI: 10.1155/2022/2466006] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 09/08/2022] [Indexed: 12/24/2022]
Abstract
RING finger (RNF) proteins are frequently dysregulated in human malignancies and are tightly associated with tumorigenesis. However, the expression profiles of RNF genes in hepatocellular carcinoma (HCC) and their relations with prognosis remain undetermined. Here, we aimed at constructing a prognostic model according to RNF genes for forecasting the outcomes of HCC patients using the data from The Cancer Genome Atlas (TCGA) program. We collected HCC datasets to validate the values of our model in predicting prognosis of HCC patients from International Cancer Genome Consortium (ICGC) platform. Then, functional experiments were carried out to explore the roles of the representative RNF in HCC progression. A total of 107 differentially expressed RNFs were obtained between TCGA-HCC tumor and normal tissues. After comprehensive evaluation, a prognostic signature composed of 11 RNFs (RNF220, RNF25, TRIM25, BMI1, RNF216P1, RNF115, RNF2, TRAIP, RNF157, RNF145, and RNF19B) was constructed based on TCGA cohort. Then, the Kaplan-Meier (KM) curves and the receiver operating characteristic curve (ROC) were employed to evaluate predictive power of the prognostic model in testing cohort (TCGA) and validation cohort (ICGC). The KM and ROC curves illustrated the good predictive power in testing and validation cohort. The areas under the ROC curve are 0.77 and 0.76 in these two cohorts, respectively. Among the prognostic signature genes, BMI1 was selected as a representative for functional study. We found that BMI1 protein level was significantly upregulated in HCC tissues. Moreover, the inhibitor of BMI1, PTC-209, displayed an excellent anti-HCC effect in vitro. Enrichment analysis of BMI1 downstream targets showed that BMI1 might be involved in tumor immunotherapy. Together, our overall analyses revealed that the 11-RNFs prognostic signature might provide us latent chances for evaluating HCC prognosis and developing novel HCC therapy.
Collapse
|
4
|
Wang MX, Liuyu T, Zhang ZD. Multifaceted Roles of the E3 Ubiquitin Ligase RING Finger Protein 115 in Immunity and Diseases. Front Immunol 2022; 13:936579. [PMID: 35844553 PMCID: PMC9279554 DOI: 10.3389/fimmu.2022.936579] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 06/06/2022] [Indexed: 11/25/2022] Open
Abstract
Ubiquitination is a post-translational modification that plays essential roles in various physiological and pathological processes. Protein ubiquitination depends on E3 ubiquitin ligases that catalyze the conjugation of ubiquitin molecules on lysine residues of targeted substrates. RING finger protein 115 (RNF115), also known as breast cancer associated gene 2 (BCA2) and Rab7-interacting RING finger protein (Rabring7), has been identified as a highly expressed protein in breast cancer cells and tissues. Later, it has been demonstrated that RNF115 catalyzes ubiquitination of a series of proteins to modulate a number of signaling pathways, and thereby regulates viral infections, autoimmunity, cell proliferation and death and tumorigenesis. In this review, we introduce the identification, expression and activity regulation of RNF115, summarize the substrates and functions of RNF115 in different pathways, and discuss the roles of RNF115 as a biomarker or therapeutic target in diseases.
Collapse
Affiliation(s)
- Mei-Xia Wang
- The Executive Master of Business Administration (EMBA) Program, School of Management, Fudan University, Shanghai, China
| | - Tianzi Liuyu
- Department of Gastrointestinal Surgery, Medical Research Institute, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Zhi-dong Zhang
- Department of Gastrointestinal Surgery, Medical Research Institute, Zhongnan Hospital of Wuhan University, Wuhan, China
- *Correspondence: Zhi-dong Zhang,
| |
Collapse
|
5
|
Zhang Z, Li H, Gan H, Tang Z, Guo Y, Yao S, Liuyu T, Zhong B, Lin D. RNF115 Inhibits the Post-ER Trafficking of TLRs and TLRs-Mediated Immune Responses by Catalyzing K11-Linked Ubiquitination of RAB1A and RAB13. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2105391. [PMID: 35343654 PMCID: PMC9165487 DOI: 10.1002/advs.202105391] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 03/07/2022] [Indexed: 05/16/2023]
Abstract
The subcellular localization and intracellular trafficking of Toll-like receptors (TLRs) critically regulate TLRs-mediated antimicrobial immunity and autoimmunity. Here, it is demonstrated that the E3 ubiquitin ligase RNF115 inhibits the post-endoplasmic reticulum (ER) trafficking of TLRs and TLRs-mediated immune responses by catalyzing ubiquitination of the small GTPases RAB1A and RAB13. It is shown that the 14-3-3 chaperones bind to AKT1-phosphorylated RNF115 and facilitate RNF115 localizing on the ER and the Golgi apparatus. RNF115 interacts with RAB1A and RAB13 and catalyzes K11-linked ubiquitination on the Lys49 and Lys61 residues of RAB1A and on the Lys46 and Lys58 residues of RAB13, respectively. Such a modification impairs the recruitment of guanosine diphosphate (GDP) dissociation inhibitor 1 (GDI1) to RAB1A and RAB13, a prerequisite for the reactivation of RAB proteins. Consistently, knockdown of RAB1A and RAB13 in Rnf115+/+ and Rnf115-/- cells markedly inhibits the post-ER and the post-Golgi trafficking of TLRs, respectively. In addition, reconstitution of RAB1AK49/61R or RAB13K46/58R into Rnf115+/+ cells but not Rnf115-/- cells promotes the trafficking of TLRs from the ER to the Golgi apparatus and from the Golgi apparatus to the cell surface, respectively. These findings uncover a common and step-wise regulatory mechanism for the post-ER trafficking of TLRs.
Collapse
Affiliation(s)
- Zhi‐Dong Zhang
- Department of Gastrointestinal SurgeryMedical Research InstituteZhongnan Hospital of Wuhan UniversityWuhan430071China
- Department of Pulmonary and Critical Care MedicineZhongnan Hospital of Wuhan UniversityWuhan430071China
- Frontier Science Center for Immunology and MetabolismWuhan UniversityWuhan430071China
- Cancer CenterRenmin Hospital of Wuhan UniversityWuhan430061China
| | - Hong‐Xu Li
- Department of Gastrointestinal SurgeryMedical Research InstituteZhongnan Hospital of Wuhan UniversityWuhan430071China
- Department of Pulmonary and Critical Care MedicineZhongnan Hospital of Wuhan UniversityWuhan430071China
- Frontier Science Center for Immunology and MetabolismWuhan UniversityWuhan430071China
| | - Hu Gan
- Department of Gastrointestinal SurgeryMedical Research InstituteZhongnan Hospital of Wuhan UniversityWuhan430071China
- Department of Pulmonary and Critical Care MedicineZhongnan Hospital of Wuhan UniversityWuhan430071China
- Frontier Science Center for Immunology and MetabolismWuhan UniversityWuhan430071China
- Department of VirologyCollege of Life SciencesWuhan UniversityWuhan430072China
| | - Zhen Tang
- Department of Gastrointestinal SurgeryMedical Research InstituteZhongnan Hospital of Wuhan UniversityWuhan430071China
- Department of Pulmonary and Critical Care MedicineZhongnan Hospital of Wuhan UniversityWuhan430071China
- Frontier Science Center for Immunology and MetabolismWuhan UniversityWuhan430071China
- Department of VirologyCollege of Life SciencesWuhan UniversityWuhan430072China
| | - Yu‐Yao Guo
- Department of Gastrointestinal SurgeryMedical Research InstituteZhongnan Hospital of Wuhan UniversityWuhan430071China
- Department of Pulmonary and Critical Care MedicineZhongnan Hospital of Wuhan UniversityWuhan430071China
- Frontier Science Center for Immunology and MetabolismWuhan UniversityWuhan430071China
| | - Shu‐Qi Yao
- Department of Gastrointestinal SurgeryMedical Research InstituteZhongnan Hospital of Wuhan UniversityWuhan430071China
- Department of Pulmonary and Critical Care MedicineZhongnan Hospital of Wuhan UniversityWuhan430071China
- Frontier Science Center for Immunology and MetabolismWuhan UniversityWuhan430071China
- Department of VirologyCollege of Life SciencesWuhan UniversityWuhan430072China
| | - Tianzi Liuyu
- Department of Gastrointestinal SurgeryMedical Research InstituteZhongnan Hospital of Wuhan UniversityWuhan430071China
| | - Bo Zhong
- Department of Gastrointestinal SurgeryMedical Research InstituteZhongnan Hospital of Wuhan UniversityWuhan430071China
- Department of Pulmonary and Critical Care MedicineZhongnan Hospital of Wuhan UniversityWuhan430071China
- Frontier Science Center for Immunology and MetabolismWuhan UniversityWuhan430071China
- Department of VirologyCollege of Life SciencesWuhan UniversityWuhan430072China
- Wuhan Research Center for Infectious Diseases and CancerChinese Academy of Medical SciencesWuhan430071China
| | - Dandan Lin
- Cancer CenterRenmin Hospital of Wuhan UniversityWuhan430061China
| |
Collapse
|
6
|
Shi Y, Castro-Gonzalez S, Chen Y, Serra-Moreno R. Effects of the SUMO Ligase BCA2 on Metabolic Activity, Cell Proliferation, Cell Migration, Cell Cycle, and the Regulation of NF-κB and IRF1 in Different Breast Epithelial Cellular Contexts. Front Cell Dev Biol 2021; 9:711481. [PMID: 34589482 PMCID: PMC8473798 DOI: 10.3389/fcell.2021.711481] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 08/25/2021] [Indexed: 12/28/2022] Open
Abstract
Breast cancer-associated gene 2 (BCA2) is an E3 ubiquitin and SUMO ligase with antiviral properties against HIV. Specifically, BCA2 (i) enhances the restriction imposed by BST2/Tetherin, impeding viral release; (ii) promotes the ubiquitination and degradation of the HIV protein Gag, limiting virion production; (iii) down-regulates NF-κB, which is necessary for HIV RNA synthesis; and (iv) activates the innate transcription factor IRF1. Due to its antiviral properties, ectopic expression of BCA2 in infected cells represents a promising therapeutic approach against HIV infection. However, BCA2 up-regulation is often observed in breast tumors. To date, the studies about BCA2 and cancer development are controversial, stating both pro- and anti-oncogenic roles. Here, we investigated the impact of BCA2 on cellular metabolic activity, cell proliferation, cell migration, and cell cycle progression. In addition, we also examined the ability of BCA2 to regulate NF-κB and IRF1 in transformed and non-tumor breast epithelial environments. Despite the fact that BCA2 promotes the transition from G1 to S phase of the cell cycle, it did not increase cell proliferation, migration nor metabolic activity. As expected, BCA2 maintains its enzymatic function at inhibiting NF-κB in different breast cancer cell lines. However, the effect of BCA2 on IRF1 differs depending on the cellular context. Specifically, BCA2 activates IRF1 in ER+ breast cell lines while it inhibits this transcription factor in ER– breast cancer cells. We hypothesize that the distinct actions of BCA2 over IRF1 may explain, at least in part, the different proposed roles for BCA2 in these cancers.
Collapse
Affiliation(s)
- Yuhang Shi
- Microbiology and Immunology, University of Rochester Medical Center, Rochester, NY, United States
| | | | - Yuexuan Chen
- Microbiology and Immunology, University of Rochester Medical Center, Rochester, NY, United States
| | - Ruth Serra-Moreno
- Microbiology and Immunology, University of Rochester Medical Center, Rochester, NY, United States
| |
Collapse
|
7
|
Wu XT, Wang YH, Cai XY, Dong Y, Cui Q, Zhou YN, Yang XW, Lu WF, Zhang M. RNF115 promotes lung adenocarcinoma through Wnt/β-catenin pathway activation by mediating APC ubiquitination. Cancer Metab 2021; 9:7. [PMID: 33509267 PMCID: PMC7842072 DOI: 10.1186/s40170-021-00243-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 01/13/2021] [Indexed: 12/20/2022] Open
Abstract
Background Patients with lung adenocarcinoma (LUAD) have high mortality rate and poor prognosis. The LUAD cells display increased aerobic glycolysis, which generates energy required for their survival and proliferation. Deregulation of Wnt/β-catenin signaling pathway induces the metabolism switching and oncogenesis in tumor cells. RING finger protein 115 (RNF115) is an E3 ligase for ubiquitin-mediated degradation. Although the oncogenic functions of RNF115 have been revealed in breast tumor cells, the effect of RNF115 on lung cancer is still not clear. Methods RNF115 expression and its correlation with the features of LUAD patients were analyzed by using public database and our own cohort. The functions of RNF115 in proliferation and energy metabolism in LUAD cells were explored by downregulating or upregulating RNF115 expression. Results We demonstrated that RNF115 was overexpressed in LUAD tissues and its expression was positively correlated with the poor overall survival of LUAD patients. Moreover, RNF115 overexpression inhibited LUAD cell apoptosis and promoted cellular proliferation and metabolism in LUAD cells. On the contrary, RNF115 knockdown displayed reverse effects. Furthermore, the underlying mechanism of the biological function of RNF115 in LUAD was through regulating Wnt/β-catenin pathway via ubiquitination of adenomatous polyposis coli (APC). Conclusion The current study reveals a close association between RNF115 expression and prognostic conditions in LUAD patients and the oncogenic roles of RNF115 in LUAD at the first time. These findings may help establish the foundation for the development of therapeutics strategies and clinical management for lung cancer in future. Supplementary Information The online version contains supplementary material available at 10.1186/s40170-021-00243-y.
Collapse
Affiliation(s)
- Xiao-Ting Wu
- Department of Integrated Traditional Chinese and Western Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, No. 241 West Huaihai Road, Xuhui District, Shanghai, 200030, China
| | - Yu-Han Wang
- Department of Integrated Traditional Chinese and Western Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Xiao-Yue Cai
- Department of Integrated Traditional Chinese and Western Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, No. 241 West Huaihai Road, Xuhui District, Shanghai, 200030, China
| | - Yun Dong
- Department of Integrated Traditional Chinese and Western Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, No. 241 West Huaihai Road, Xuhui District, Shanghai, 200030, China
| | - Qing Cui
- Department of Integrated Traditional Chinese and Western Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, No. 241 West Huaihai Road, Xuhui District, Shanghai, 200030, China
| | - Ya-Ning Zhou
- Department of Integrated Traditional Chinese and Western Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, No. 241 West Huaihai Road, Xuhui District, Shanghai, 200030, China
| | - Xi-Wen Yang
- LongHua Hospital Shanghai University of Traditional Chinese Medicine/Oncology Division 2, Shanghai, China
| | - Wen-Feng Lu
- Department of Integrated Traditional Chinese and Western Medicine, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Ming Zhang
- Department of Integrated Traditional Chinese and Western Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, No. 241 West Huaihai Road, Xuhui District, Shanghai, 200030, China.
| |
Collapse
|
8
|
Zhang ZD, Xiong TC, Yao SQ, Wei MC, Chen M, Lin D, Zhong B. RNF115 plays dual roles in innate antiviral responses by catalyzing distinct ubiquitination of MAVS and MITA. Nat Commun 2020; 11:5536. [PMID: 33139700 PMCID: PMC7606512 DOI: 10.1038/s41467-020-19318-3] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 10/07/2020] [Indexed: 02/07/2023] Open
Abstract
MAVS and MITA are essential adaptor proteins mediating innate antiviral immune responses against RNA and DNA viruses, respectively. Here we show that RNF115 plays dual roles in response to RNA or DNA virus infections by catalyzing distinct types of ubiquitination of MAVS and MITA at different phases of viral infection. RNF115 constitutively interacts with and induces K48-linked ubiquitination and proteasomal degradation of homeostatic MAVS in uninfected cells, whereas associates with and catalyzes K63-linked ubiquitination of MITA after HSV-1 infection. Consistently, the protein levels of MAVS are substantially increased in Rnf115−/− organs or cells without viral infection, and HSV-1-induced aggregation of MITA is impaired in Rnf115−/− cells compared to the wild-type counterparts. Consequently, the Rnf115−/− mice exhibit hypo- and hyper-sensitivity to EMCV and HSV-1 infection, respectively. These findings highlight dual regulation of cellular antiviral responses by RNF115-mediated ubiquitination of MAVS and MITA and contribute to our understanding of innate immune signaling. MAVS and MITA are adapter proteins that play distinct roles in the context of the host response to RNA and DNA viruses, respectively. Here the authors implicate RNF115 in dual temporal and spatial mechanisms of interacting and catalyzing distinct ubiquitination of MAVS and MITA to modulate RNA and DNA antiviral immune responses.
Collapse
Affiliation(s)
- Zhi-Dong Zhang
- Department of Virology, College of Life Sciences, Zhongnan Hospital of Wuhan University, 430071, Wuhan, China.,Department of Gastrointestinal Surgery, Zhongnan Hospital of Wuhan University, 430071, Wuhan, China.,Department of Immunology, Medical Research Institute and Frontier Science Center for Immunology and Metabolism, Wuhan University, 430072, Wuhan, China
| | - Tian-Chen Xiong
- Department of Virology, College of Life Sciences, Zhongnan Hospital of Wuhan University, 430071, Wuhan, China.,Department of Gastrointestinal Surgery, Zhongnan Hospital of Wuhan University, 430071, Wuhan, China.,Department of Immunology, Medical Research Institute and Frontier Science Center for Immunology and Metabolism, Wuhan University, 430072, Wuhan, China
| | - Shu-Qi Yao
- Department of Virology, College of Life Sciences, Zhongnan Hospital of Wuhan University, 430071, Wuhan, China.,Department of Gastrointestinal Surgery, Zhongnan Hospital of Wuhan University, 430071, Wuhan, China.,Department of Immunology, Medical Research Institute and Frontier Science Center for Immunology and Metabolism, Wuhan University, 430072, Wuhan, China
| | - Ming-Cong Wei
- Department of Virology, College of Life Sciences, Zhongnan Hospital of Wuhan University, 430071, Wuhan, China.,Department of Gastrointestinal Surgery, Zhongnan Hospital of Wuhan University, 430071, Wuhan, China.,Department of Immunology, Medical Research Institute and Frontier Science Center for Immunology and Metabolism, Wuhan University, 430072, Wuhan, China
| | - Ming Chen
- Department of Blood Transfusion, Zhongnan Hospital of Wuhan University, 430071, Wuhan, China
| | - Dandan Lin
- Cancer Center, Renmin Hospital of Wuhan University, 430060, Wuhan, China
| | - Bo Zhong
- Department of Virology, College of Life Sciences, Zhongnan Hospital of Wuhan University, 430071, Wuhan, China. .,Department of Gastrointestinal Surgery, Zhongnan Hospital of Wuhan University, 430071, Wuhan, China. .,Department of Immunology, Medical Research Institute and Frontier Science Center for Immunology and Metabolism, Wuhan University, 430072, Wuhan, China.
| |
Collapse
|
9
|
RNF115 deletion inhibits autophagosome maturation and growth of gastric cancer. Cell Death Dis 2020; 11:810. [PMID: 32980859 PMCID: PMC7519909 DOI: 10.1038/s41419-020-03011-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 09/13/2020] [Accepted: 09/15/2020] [Indexed: 12/23/2022]
Abstract
Autophagy is a highly conserved lysosome-dependent degradation system in eukaryotic cells. This process removes long-lived intracellular proteins, damaged organelles, and recycles biological material to maintain cellular homeostasis. Dysfunction of autophagy triggers a wide spectrum of human diseases, including cancer and neurodegenerative diseases. In the present study, we show that RNF115, an E3 ubiquitin ligase, regulates autophagosome–lysosome fusion and autophagic degradation under both nutrient-enriched and stress conditions. Depletion of the RNF115 gene caused the accumulation of autophagosomes by impairing fusion with lysosomes, which results in an accumulation of autophagic substrates. Further investigation suggests that RNF115 interacts with STX17 and enhances its stability, which is essential for autophagosome maturation. Importantly, we provide in vitro and in vivo evidence that RNF115 inactivation inhibits the tumorigenesis and metastasis of BGC823 gastric cancer cells. We additionally show that high expression levels of RNF115 mRNA correlate with poor prognosis in gastric cancer patients. These findings indicate that RNF115 may play an evolutionarily conserved role in the autophagy pathway, and may act to maintain protein homeostasis under physiological conditions. These data demonstrate the need to further evaluate the potential therapeutic implications of RNF115 in gastric cancer.
Collapse
|
10
|
Romano R, Bucci C. Role of EGFR in the Nervous System. Cells 2020; 9:E1887. [PMID: 32806510 PMCID: PMC7464966 DOI: 10.3390/cells9081887] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/31/2020] [Accepted: 08/10/2020] [Indexed: 12/13/2022] Open
Abstract
Epidermal growth factor receptor (EGFR) is the first discovered member of the receptor tyrosine kinase superfamily and plays a fundamental role during embryogenesis and in adult tissues, being involved in growth, differentiation, maintenance and repair of various tissues and organs. The role of EGFR in the regulation of tissue development and homeostasis has been thoroughly investigated and it has also been demonstrated that EGFR is a driver of tumorigenesis. In the nervous system, other growth factors, and thus other receptors, are important for growth, differentiation and repair of the tissue, namely neurotrophins and neurotrophins receptors. For this reason, for a long time, the role of EGFR in the nervous system has been underestimated and poorly investigated. However, EGFR is expressed both in the central and peripheral nervous systems and it has been demonstrated to have specific important neurotrophic functions, in particular in the central nervous system. This review discusses the role of EGFR in regulating differentiation and functions of neurons and neuroglia. Furthermore, its involvement in regeneration after injury and in the onset of neurodegenerative diseases is examined.
Collapse
Affiliation(s)
| | - Cecilia Bucci
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, 73100 Lecce, Italy;
| |
Collapse
|
11
|
Hu X, Wang L, Wang Y, Ji J, Li J, Wang Z, Li C, Zhang Y, Zhang ZR. RNF126-Mediated Reubiquitination Is Required for Proteasomal Degradation of p97-Extracted Membrane Proteins. Mol Cell 2020; 79:320-331.e9. [DOI: 10.1016/j.molcel.2020.06.023] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 04/21/2020] [Accepted: 06/12/2020] [Indexed: 12/13/2022]
|
12
|
Qu M, Wang W, Li W, Cao J, Zhang X, Wang C, Wu J, Yu B, Zhang H, Wu H, Kong W, Yu X. Antiviral Activity of Feline BCA2 Is Mainly Dependent on Its Interference With Proviral Transcription Rather Than Degradation of FIV Gag. Front Microbiol 2020; 11:1230. [PMID: 32595622 PMCID: PMC7301684 DOI: 10.3389/fmicb.2020.01230] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 05/14/2020] [Indexed: 12/12/2022] Open
Abstract
Human BCA2/RNF115/Rabring7 (hBCA2) is a RING type E3 ubiquitin ligase with the ability of autoubiquitination or promoting protein ubiquitination. It also acts as a host restriction factor has BST2-dependent and BST2-independent antiviral activity to inhibit the release of HIV-1. In a previous study, we demonstrated that feline BCA2 (fBCA2) also has E3 ubiquitin ligase activity, although its antiviral mechanism remained unclear. In this study, we showed that fBCA2 can interact with feline BST2 (fBST2) and exhibits an fBST2-independent antiviral function, and the RING domain is necessary for the antiviral activity of fBCA2. fBCA2 could degrade HIV-1 Gag and restrict HIV-1 transcription to counteract HIV-1 but not promote the degradation of HIV-1 through lysosomal. Furthermore, for both fBCA2 and hBCA2, restricting viral transcription is the main anti-FIV mechanism compared to degradation of FIV Gag or promoting viral degradation. Consequently, transcriptional regulation of HIV or FIV by BCA2 should be the primary restriction mechanism, even though the degradation mechanism is different when BCA2 counteracts HIV or FIV. This may be due to BCA2 has a special preference in antiviral mechanism in the transmission of primate or non-primate retroviruses.
Collapse
Affiliation(s)
- Meng Qu
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, China
| | - Weiran Wang
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, China
| | - Weiting Li
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, China
| | - Jiaming Cao
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, China
| | - Xin Zhang
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, China
| | - Chu Wang
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, China
| | - Jiaxin Wu
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, China
| | - Bin Yu
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, China
| | - Haihong Zhang
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, China
| | - Hui Wu
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, China
| | - Wei Kong
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, China.,Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, School of Life Sciences, Jilin University, Changchun, China
| | - Xianghui Yu
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, China.,Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, School of Life Sciences, Jilin University, Changchun, China
| |
Collapse
|
13
|
Xiao G, Yang Q, Bao Z, Mao H, Zhang Y, Lin S. Expression of tripartite motif-containing 44 and its prognostic and clinicopathological value in human malignancies:a meta-analysis. BMC Cancer 2020; 20:525. [PMID: 32503466 PMCID: PMC7275359 DOI: 10.1186/s12885-020-07014-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 05/28/2020] [Indexed: 01/29/2023] Open
Abstract
Background Previous researches have reported that tripartite motif-containing 44 (TRIM44) is related to the prognosis of multiple human tumors. This study was designed to systematically assess the prognostic value of TRIM44 in human malignancies and summarize its possible tumor-related mechanisms. Methods The available databases were searched for eligible studies that evaluated the clinicopathological and prognostic roles of TRIM44 in patients with malignancies. The hazard ratios (HR) and odds ratios (OR) were combined to assess the predictive role of TRIM44 using Stata/SE 14.1 software. Results A total of 1740 patients from thirteen original studies were finally included in this study. The results of the combined analysis showed that over-expression of TRIM44 protein was significantly correlated with shorter overall survival (OS) (HR = 1.94, 95% CI: 1.60–2.35) and worse disease-free survival (DFS) (HR = 2.13, 95% CI: 1.24–3.65) in cancer patients. Additionally, the combined ORs indicated that elevated expression level of TRIM44 protein was significantly associated with lymph node metastasis (OR = 2.69, 95% CI: 1.71–4.24), distant metastasis (OR = 10.35, 95% CI: 1.01–106.24), poor tumor differentiation (OR = 1.78, 95% CI: 1.03–3.09), increased depth of tumor invasion (OR = 2.72, 95% CI: 1.73–4.30), advanced clinical stage (OR = 2.75, 95% CI: 2.04–3.71), and recurrence (OR = 2.30, 95% CI: 1.34–3.95). Furthermore, analysis results using Gene Expression Profiling Interactive Analysis (GEPIA) showed that the expression level of TRIM44 mRNA was higher in most tumor tissues than in the corresponding normal tissues, and the relationship between TRIM44 mRNA level and prognosis in various malignant tumors also explored in GEPIA and OS analysis webservers. Conclusions TRIM44 may serve as a valuable prognostic biomarker and a potential therapeutic target for patients with malignancies.
Collapse
Affiliation(s)
- Guoliang Xiao
- Department of General Surgery, the First People's Hospital of Neijiang, Neijiang, 641000, Sichuan Province, PR China
| | - Qiuxi Yang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Hainan Medical University, Haikou, 570100, Hainan Province, PR China
| | - Ziwei Bao
- Department of medicine, Southwest Medical University, Luzhou, 646000, Sichuan Province, PR China
| | - Haixia Mao
- Department of medicine, Southwest Medical University, Luzhou, 646000, Sichuan Province, PR China
| | - Yi Zhang
- Department of General Surgery, the First People's Hospital of Neijiang, Neijiang, 641000, Sichuan Province, PR China.
| | - Shibu Lin
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Hainan Medical University, Haikou, 570100, Hainan Province, PR China
| |
Collapse
|
14
|
Agarwal P, Patel K, More P, Sapara KK, Singh VK, Agarwal PK. The AlRabring7 E3-Ub-ligase mediates AlRab7 ubiquitination and improves ionic and oxidative stress tolerance in Saccharomyces cerevisiae. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 151:689-704. [PMID: 32353675 DOI: 10.1016/j.plaphy.2020.03.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 03/13/2020] [Accepted: 03/23/2020] [Indexed: 06/11/2023]
Abstract
The maintenance of ROS homeostasis, membrane biogenesis and recycling of molecules are common stress responses involving specific and complex regulatory network. Ubiquitination is an important and common mechanism which facilitates environmental adaptation in eukaryotes. In the present study we have cloned the AlRabring7, an E3-Ub-ligase, previously identified as AlRab7 interacting partner. The role of AlRabring7 for ubiquitinating AlRab7 and facilitating stress tolerance is analysed. The AlRabring7, with an open-reading frame of 702 bp encodes a protein of 233 amino acids, with RING-HC domain of 40 amino acids. In silico analysis shows that AlRabring7 is a C3HC4-type RING E3 Ub ligase. The protein - protein docking show interaction dynamics between AlRab7-AlRabring7-Ubiquitin proteins. The AlRab7 and AlRabring7 transcript showed up-regulation in response to different salts i.e: NaCl, KCl, CaCl2, NaCl + KCl, NaCl + CaCl2, imposing ionic as well as hyperosmotic stress, and also with oxidative stress by H2O2 treatment. Interestingly, the AlRabring7 showed early transcript expression with maximum expression in shoots on combinatorial stresses. The AlRab7 showed delayed and maximum expression with NaCl + CaCl2 stress treatment. The AlRab7 complements yeast ypt7Δ mutants and restored the fragmented vacuole. The in vitro ubiquitination assay revealed that AlRabring7 function as E3 ubiquitin ligase and mediates AlRab7 ubiquitination. Overexpression of AlRab7 and AlRabring7 independently and when co-transformed enhanced the growth of yeast cells during stress conditions. Further, the bimolecular fluorescence complementation assay shows the in planta interaction of the two proteins. Our results suggest that AlRab7 and AlRabring7 confers enhanced stress tolerance in yeast.
Collapse
Affiliation(s)
- Parinita Agarwal
- Plant Omics Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific & Industrial Research (CSIR), Gijubhai Badheka Marg, Bhavnagar, 364 002, Gujarat, India.
| | - Khantika Patel
- Plant Omics Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific & Industrial Research (CSIR), Gijubhai Badheka Marg, Bhavnagar, 364 002, Gujarat, India
| | - Prashant More
- Plant Omics Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific & Industrial Research (CSIR), Gijubhai Badheka Marg, Bhavnagar, 364 002, Gujarat, India; Academy of Scientific and Innovative Research, (AcSIR), Ghaziabad, 201002, India
| | - Komal K Sapara
- Plant Omics Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific & Industrial Research (CSIR), Gijubhai Badheka Marg, Bhavnagar, 364 002, Gujarat, India; Academy of Scientific and Innovative Research, (AcSIR), Ghaziabad, 201002, India
| | - Vinay K Singh
- Centre for Bioinformatics, School of Biotechnology, Banaras Hindu University, Varanasi, 221005, Uttar Pradesh, India
| | - Pradeep K Agarwal
- Plant Omics Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific & Industrial Research (CSIR), Gijubhai Badheka Marg, Bhavnagar, 364 002, Gujarat, India; Academy of Scientific and Innovative Research, (AcSIR), Ghaziabad, 201002, India
| |
Collapse
|
15
|
Zhang R, Liu W, Sun J, Kong Y, Chen C. Roles of RNF126 and BCA2 E3 ubiquitin ligases in DNA damage repair signaling and targeted cancer therapy. Pharmacol Res 2020; 155:104748. [DOI: 10.1016/j.phrs.2020.104748] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 03/04/2020] [Accepted: 03/05/2020] [Indexed: 01/16/2023]
|
16
|
Wang C, Wen A, Qiao J, Liu Y, Guo Y, Wang W. High Expression of RING Finger Protein 126 Predicts Unfavorable Prognosis of Epithelial Ovarian Cancer. Med Sci Monit 2020; 26:e921370. [PMID: 32254065 PMCID: PMC7163335 DOI: 10.12659/msm.921370] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Background Ovarian cancer (OC) is one of the leading causes of cancer-related mortality worldwide. The clinical outcome of EOC remains unsatisfactory with current therapeutic approaches such as surgery and platinum/taxane-based chemotherapy. Therefore, novel prognostic markers and personalized therapies targeting specific molecules are urgently needed. Here, we explored whether RNF126, an E3 ubiquitin ligase, is a potential biomarker for epithelial ovarian cancer (EOC). Material/Methods This was a retrospective cohort study of 122 EOC patients. The chi-square test was used to assess correlations between RNF126 level and clinical characteristics of enrolled patients. Univariate and multivariate analyses were performed to monitor the prognosis of enrolled patients. In addition, proliferation and invasion assays were conducted to assess the cellular effects of RNF126 on SKOV3 cell progression. Results Immunohistochemistry analysis (IHC) revealed that RNF126 was upregulated in EOC tissues compared to adjacent ovarian tissues. In addition, RNF126 expression was remarkably associated with LN metastasis, pathological differentiation, and FIGO stage. RNF126 protein level was found to be an independent biomarker for predication of prognosis in ovarian cancer patients. Cellular results showed that RNF126 enhanced the proliferation and invasion abilities of SKOV3 cells. Conclusions Upregulated protein level of RNF126 in EOC tissues is a biomarker predicting poor outcomes of EOC patients.
Collapse
Affiliation(s)
- Chuanjiang Wang
- Department of Obstetrics and Gynecology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China (mainland).,Department of Obstetrics and Gynecology, University Medical Center Regensburg, Regensburg, Germany
| | - Aiping Wen
- Department of Obstetrics and Gynecology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China (mainland)
| | - Jing Qiao
- Department of Obstetrics and Gynecology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China (mainland)
| | - Yujuan Liu
- Department of Obstetrics and Gynecology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China (mainland)
| | - Yuanyuan Guo
- Department of Obstetrics and Gynecology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan, China (mainland)
| | - Wenxia Wang
- Department of Obstetrics, Qilu Hospital of Shandong University, Jinan, Shandong, China (mainland)
| |
Collapse
|
17
|
Jacinta-Fernandes A, Xavier JM, Magno R, Lage JG, Maia AT. Allele-specific miRNA-binding analysis identifies candidate target genes for breast cancer risk. NPJ Genom Med 2020; 5:4. [PMID: 32128252 PMCID: PMC7018948 DOI: 10.1038/s41525-019-0112-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Accepted: 12/05/2019] [Indexed: 12/15/2022] Open
Abstract
Most breast cancer (BC) risk-associated single-nucleotide polymorphisms (raSNPs) identified in genome-wide association studies (GWAS) are believed to cis-regulate the expression of genes. We hypothesise that cis-regulatory variants contributing to disease risk may be affecting microRNA (miRNA) genes and/or miRNA binding. To test this, we adapted two miRNA-binding prediction algorithms-TargetScan and miRanda-to perform allele-specific queries, and integrated differential allelic expression (DAE) and expression quantitative trait loci (eQTL) data, to query 150 genome-wide significant ( P ≤ 5 × 10 - 8 ) raSNPs, plus proxies. We found that no raSNP mapped to a miRNA gene, suggesting that altered miRNA targeting is an unlikely mechanism involved in BC risk. Also, 11.5% (6 out of 52) raSNPs located in 3'-untranslated regions of putative miRNA target genes were predicted to alter miRNA::mRNA (messenger RNA) pair binding stability in five candidate target genes. Of these, we propose RNF115, at locus 1q21.1, as a strong novel target gene associated with BC risk, and reinforce the role of miRNA-mediated cis-regulation at locus 19p13.11. We believe that integrating allele-specific querying in miRNA-binding prediction, and data supporting cis-regulation of expression, improves the identification of candidate target genes in BC risk, as well as in other common cancers and complex diseases.
Collapse
Affiliation(s)
- Ana Jacinta-Fernandes
- 1Department of Biomedical Sciences and Medicine (DCBM), Universidade do Algarve, Faro, 8005-139 Portugal.,2Centre for Biomedical Research (CBMR), Universidade do Algarve, Faro, 8005-139 Portugal.,3Algarve Biomedical Center (ABC), Universidade do Algarve, Faro, 8005-139 Portugal
| | - Joana M Xavier
- 1Department of Biomedical Sciences and Medicine (DCBM), Universidade do Algarve, Faro, 8005-139 Portugal.,2Centre for Biomedical Research (CBMR), Universidade do Algarve, Faro, 8005-139 Portugal.,3Algarve Biomedical Center (ABC), Universidade do Algarve, Faro, 8005-139 Portugal
| | - Ramiro Magno
- 2Centre for Biomedical Research (CBMR), Universidade do Algarve, Faro, 8005-139 Portugal.,3Algarve Biomedical Center (ABC), Universidade do Algarve, Faro, 8005-139 Portugal
| | - Joel G Lage
- 1Department of Biomedical Sciences and Medicine (DCBM), Universidade do Algarve, Faro, 8005-139 Portugal.,2Centre for Biomedical Research (CBMR), Universidade do Algarve, Faro, 8005-139 Portugal.,3Algarve Biomedical Center (ABC), Universidade do Algarve, Faro, 8005-139 Portugal
| | - Ana-Teresa Maia
- 1Department of Biomedical Sciences and Medicine (DCBM), Universidade do Algarve, Faro, 8005-139 Portugal.,2Centre for Biomedical Research (CBMR), Universidade do Algarve, Faro, 8005-139 Portugal.,3Algarve Biomedical Center (ABC), Universidade do Algarve, Faro, 8005-139 Portugal
| |
Collapse
|
18
|
Ongaro A, Ribaudo G, Zagotto G, Memo M, Gianoncelli A. Synthesis via A3 Coupling Reaction of Anthracene‐Propargylamine as a New Scaffold for the Interaction with DNA. ChemistrySelect 2019. [DOI: 10.1002/slct.201902975] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Alberto Ongaro
- Department of Molecular and Translational MedicineUniversity of Brescia Viale Europa 11 25123 Brescia Italy
| | - Giovanni Ribaudo
- Department of Molecular and Translational MedicineUniversity of Brescia Viale Europa 11 25123 Brescia Italy
| | - Giuseppe Zagotto
- Department of Pharmaceutical and Pharmacological Sciences University of Padova Via Marzolo 5 35131 Padova Italy
| | - Maurizio Memo
- Department of Molecular and Translational MedicineUniversity of Brescia Viale Europa 11 25123 Brescia Italy
| | - Alessandra Gianoncelli
- Department of Molecular and Translational MedicineUniversity of Brescia Viale Europa 11 25123 Brescia Italy
| |
Collapse
|
19
|
Guerra F, Bucci C. Role of the RAB7 Protein in Tumor Progression and Cisplatin Chemoresistance. Cancers (Basel) 2019; 11:cancers11081096. [PMID: 31374919 PMCID: PMC6721790 DOI: 10.3390/cancers11081096] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 07/23/2019] [Accepted: 07/30/2019] [Indexed: 12/19/2022] Open
Abstract
RAB7 is a small guanosine triphosphatase (GTPase) extensively studied as regulator of vesicular trafficking. Indeed, its role is fundamental in several steps of the late endocytic pathway, including endosome maturation, transport from early endosomes to late endosomes and lysosomes, clustering and fusion of late endosomes and lysosomes in the perinuclear region and lysosomal biogenesis. Besides endocytosis, RAB7 is important for a number of other cellular processes among which, autophagy, apoptosis, signaling, and cell migration. Given the importance of RAB7 in these cellular processes, the interest to study the role of RAB7 in cancer progression is widely grown. Here, we describe the current understanding of oncogenic and oncosuppressor functions of RAB7 analyzing cellular context and other environmental factors in which it elicits pro and/or antitumorigenic effects. We also discuss the role of RAB7 in cisplatin resistance associated with its ability to regulate the late endosomal pathway, lysosomal biogenesis and extracellular vesicle secretion. Finally, we examined the potential cancer therapeutic strategies targeting the different molecular events in which RAB7 is involved.
Collapse
Affiliation(s)
- Flora Guerra
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Via Provinciale Lecce-Monteroni 165, 73100 Lecce, Italy.
| | - Cecilia Bucci
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), University of Salento, Via Provinciale Lecce-Monteroni 165, 73100 Lecce, Italy.
| |
Collapse
|
20
|
Roshan MH, Shing YK, Pace NP. Metformin as an adjuvant in breast cancer treatment. SAGE Open Med 2019; 7:2050312119865114. [PMID: 31360518 PMCID: PMC6637843 DOI: 10.1177/2050312119865114] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 07/01/2019] [Indexed: 12/13/2022] Open
Abstract
Breast cancer is one of the most common malignancies in females. It is an etiologically complex disease driven by a multitude of cellular pathways. The proliferation and spread of breast cancer is intimately linked to cellular glucose metabolism, given that glucose is an essential cellular metabolic substrate and that insulin signalling has mitogenic effects. Growing interest has focused on anti-diabetic agents in the management of breast cancer. Epidemiologic studies show that metformin reduces cancer incidence and mortality among type 2 diabetic patients. Preclinical in vitro and in vivo research provides intriguing insight into the cellular mechanisms behind the oncostatic effects of metformin. This article aims to provide an overview of the mechanisms in which metformin may elicit its anti-cancerous effects and discuss its potential role as an adjuvant in the management of breast cancer.
Collapse
Affiliation(s)
- Mohsin Hk Roshan
- Centre for Molecular Medicine and Biobanking, Faculty of Medicine and Surgery, University of Malta, Msida, Malta
| | - Yan K Shing
- Pamela Youde Nethersole Eastern Hospital, Hong Kong
| | - Nikolai P Pace
- Centre for Molecular Medicine and Biobanking, Faculty of Medicine and Surgery, University of Malta, Msida, Malta
| |
Collapse
|
21
|
Lu Q, Lu D, Shao ZM, Li DQ. Deubiquitinase ubiquitin-specific protease 9X regulates the stability and function of E3 ubiquitin ligase ring finger protein 115 in breast cancer cells. Cancer Sci 2019; 110:1268-1278. [PMID: 30689267 PMCID: PMC6447854 DOI: 10.1111/cas.13953] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 01/22/2019] [Accepted: 01/24/2019] [Indexed: 12/24/2022] Open
Abstract
The E3 ubiquitin ligase ring finger protein 115 (RNF115) is overexpressed in more than half of human breast tumors and is implicated in the pathogenesis and progression of breast cancer. However, the mechanism behind RNF115 overexpression in breast tumors remains largely unknown. Here we report that ubiquitin‐specific protease 9X (USP9X), a substrate‐specific deubiquitinating enzyme, stabilizes RNF115 and thereby regulates its biological functions in breast cancer cells. Immunoprecipitation and GST pull‐down assays showed that USP9X interacted with RNF115. Depletion of RNF115 by siRNAs or overexpression of RNF115 did not significantly affect USP9X expression. In contrast, knockdown of USP9X in breast cancer cells by siRNAs reduced RNF115 protein abundance, which was partially restored following treatment with proteasome inhibitor MG‐132. Moreover, depletion of USP9X reduced the half‐life of RNF115 and increased its ubiquitination. Conversely, overexpression of USP9X resulted in an accumulation of RNF115 protein, accompanied by a decrease in its ubiquitination. RNF115 mRNA levels were unaffected by overexpression or knockdown of USP9X. Furthermore, USP9X protein expression levels correlated positively with RNF115 in breast cancer cell lines and breast tumor samples. Importantly, reintroduction of RNF115 in USP9X‐depleted cells partially rescued the reduced proliferation, migration, and invasion of breast cancer cells by USP9X knockdown. Collectively, these findings indicate that USP9X is a stabilizer of RNF115 protein and that the USP9X‐RNF115 signaling axis is implicated in the breast cancer malignant phenotype.
Collapse
Affiliation(s)
- Qin Lu
- Shanghai Cancer Center and Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Dayun Lu
- CAS Key Laboratory of Receptor Research, Department of Analytical Chemistry, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Zhi-Ming Shao
- Shanghai Cancer Center and Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China.,Cancer Institute, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Breast Surgery, Shanghai Medical College, Fudan University, Shanghai, China.,Key Laboratory of Breast Cancer in Shanghai, Shanghai Medical College, Fudan University, Shanghai, China
| | - Da-Qiang Li
- Shanghai Cancer Center and Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China.,Cancer Institute, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Breast Surgery, Shanghai Medical College, Fudan University, Shanghai, China.,Key Laboratory of Breast Cancer in Shanghai, Shanghai Medical College, Fudan University, Shanghai, China
| |
Collapse
|
22
|
Park JH, Kang CH, Nawkar GM, Lee ES, Paeng SK, Chae HB, Chi YH, Kim WY, Yun DJ, Lee SY. EMR, a cytosolic-abundant ring finger E3 ligase, mediates ER-associated protein degradation in Arabidopsis. THE NEW PHYTOLOGIST 2018; 220:163-177. [PMID: 29932218 DOI: 10.1111/nph.15279] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Accepted: 05/18/2018] [Indexed: 05/16/2023]
Abstract
Investigation of the endoplasmic reticulum-associated degradation (ERAD) system in plants led to the identification of ERAD-mediating RING finger protein (EMR) as a plant-specific ERAD E3 ligase from Arabidopsis. EMR was significantly up-regulated under endoplasmic reticulum (ER) stress conditions. The EMR protein purified from bacteria displayed high E3 ligase activity, and tobacco leaf-produced EMR mediated mildew resistance locus O-12 (MLO12) degradation in a proteasome-dependent manner. Subcellular localization and coimmunoprecipitation analyses showed that EMR forms a complex with ubiquitin-conjugating enzyme 32 (UBC32) as a cytosolic interaction partner. Mutation of EMR and RNA interference (RNAi) increased the tolerance of plants to ER stress. EMR RNAi in the bri1-5 background led to partial recovery of the brassinosteroid (BR)-insensitive phenotypes as compared with the original mutant plants and increased ER stress tolerance. The presented results suggest that EMR is involved in the plant ERAD system that affects BR signaling under ER stress conditions as a novel Arabidopsis ring finger E3 ligase mainly present in cytosol while the previously identified ERAD E3 components are typically membrane-bound proteins.
Collapse
Affiliation(s)
- Joung Hun Park
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| | - Chang Ho Kang
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| | - Ganesh M Nawkar
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| | - Eun Seon Lee
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| | - Seol Ki Paeng
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| | - Ho Byoung Chae
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| | - Yong Hun Chi
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| | - Woe Yeon Kim
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| | - Dae-Jin Yun
- Department of Biomedical Science and Engineering, Konkuk University, Seoul, 05029, Korea
| | - Sang Yeol Lee
- Division of Applied Life Sciences (BK21+) and Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, 52828, Korea
| |
Collapse
|
23
|
Liu C, Cao R, Xu Y, Li T, Li F, Chen S, Xu R, Sun K. Rare copy number variants analysis identifies novel candidate genes in heterotaxy syndrome patients with congenital heart defects. Genome Med 2018; 10:40. [PMID: 29843777 PMCID: PMC5975672 DOI: 10.1186/s13073-018-0549-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 05/10/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Heterotaxy (Htx) syndrome comprises a class of congenital disorders resulting from malformations in left-right body patterning. Approximately 90% of patients with heterotaxy have serious congenital heart diseases; as a result, the survival rate and outcomes of Htx patients are not satisfactory. However, the underlying etiology and mechanisms in the majority of Htx cases remain unknown. The aim of this study was to investigate the function of rare copy number variants (CNVs) in the pathogenesis of Htx. METHODS We collected 63 sporadic Htx patients with congenital heart defects and identified rare CNVs using an Affymetrix CytoScan HD microarray and real-time polymerase chain reaction. Potential candidate genes associated with the rare CNVs were selected by referring to previous literature related to left-right development. The expression patterns and function of candidate genes were further analyzed by whole mount in situ hybridization, morpholino knockdown, clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 9 (Cas9)-mediated mutation, and over-expressing methods with zebrafish models. RESULTS Nineteen rare CNVs were identified for the first time in patients with Htx. These CNVs include 5 heterozygous genic deletions, 4 internal genic duplications, and 10 complete duplications of at least one gene. Further analyses of the 19 rare CNVs identified six novel potential candidate genes (NUMB, PACRG, TCTN2, DANH10, RNF115, and TTC40) linked to left-right patterning. These candidate genes exhibited early expression patterns in zebrafish embryos. Functional testing revealed that downregulation and over-expression of five candidate genes (numb, pacrg, tctn2, dnah10, and rnf115) in zebrafish resulted in disruption of cardiac looping and abnormal expression of lefty2 or pitx2, molecular markers of left-right patterning. CONCLUSIONS Our findings show that Htx with congenital heart defects in some sporadic patients may be attributed to rare CNVs. Furthermore, DNAH10 and RNF115 are Htx candidate genes involved in left-right patterning which have not previously been reported in either humans or animals. Our results also advance understanding of the genetic components of Htx.
Collapse
Affiliation(s)
- Chunjie Liu
- Department of Pediatric Cardiology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Ruixue Cao
- Department of Pediatric Cardiology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Zhejiang, China
| | - Yuejuan Xu
- Department of Pediatric Cardiology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Tingting Li
- Department of Pediatric Cardiology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Fen Li
- Department of Cardiology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Sun Chen
- Department of Pediatric Cardiology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Rang Xu
- Scientific Research Center, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
| | - Kun Sun
- Department of Pediatric Cardiology, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
| |
Collapse
|
24
|
The role of zinc and its compounds in leukemia. J Biol Inorg Chem 2018; 23:347-362. [DOI: 10.1007/s00775-018-1545-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 02/09/2018] [Indexed: 12/23/2022]
|
25
|
Yang X, Pan Y, Qiu Z, Du Z, Zhang Y, Fa P, Gorityala S, Ma S, Li S, Chen C, Wang H, Xu Y, Yan C, Ruth K, Ma Z, Zhang J. RNF126 as a Biomarker of a Poor Prognosis in Invasive Breast Cancer and CHEK1 Inhibitor Efficacy in Breast Cancer Cells. Clin Cancer Res 2018; 24:1629-1643. [PMID: 29326282 DOI: 10.1158/1078-0432.ccr-17-2242] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 11/10/2017] [Accepted: 01/05/2018] [Indexed: 01/20/2023]
Abstract
Purpose: (i) To investigate the expression of the E3 ligase, RNF126, in human invasive breast cancer and its links with breast cancer outcomes; and (ii) to test the hypothesis that RNF126 determines the efficacy of inhibitors targeting the cell-cycle checkpoint kinase, CHEK1.Experimental Design: A retrospective analysis by immunohistochemistry (IHC) compared RNF126 staining in 110 invasive breast cancer and 78 paired adjacent normal tissues with clinicopathologic data. Whether RNF126 controls CHEK1 expression was determined by chromatin immunoprecipitation and a CHEK1 promoter driven luciferase reporter. Staining for these two proteins by IHC using tissue microarrays was also conducted. Cell killing/replication stress induced by CHEK1 inhibition was evaluated in cells, with or without RNF126 knockdown, by MTT/colony formation, replication stress biomarker immunostaining and DNA fiber assays.Results: RNF126 protein expression was elevated in breast cancer tissue samples. RNF126 was associated with a poor clinical outcome after multivariate analysis and was an independent predictor. RNF126 promotes CHEK1 transcript expression. Critically, a strong correlation between RNF126 and CHEK1 proteins was identified in breast cancer tissue and cell lines. The inhibition of CHEK1 induced a greater cell killing and a higher level of replication stress in breast cancer cells expressing RNF126 compared to RNF126 depleted cells.Conclusions: RNF126 protein is highly expressed in invasive breast cancer tissue. The high expression of RNF126 is an independent predictor of a poor prognosis in invasive breast cancer and is considered a potential biomarker of a cancer's responsiveness to CHEK1 inhibitors. CHEK1 inhibition targets breast cancer cells expressing higher levels of RNF126 by enhancing replication stress. Clin Cancer Res; 24(7); 1629-43. ©2018 AACR.
Collapse
Affiliation(s)
- Xiaosong Yang
- Department of Radiation Oncology, School of Medicine, Case Western Reserve University, Cleveland, Ohio.,Department of Breast Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - You Pan
- Department of Radiation Oncology, School of Medicine, Case Western Reserve University, Cleveland, Ohio.,Department of Breast Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Zhaojun Qiu
- Department of Radiation Oncology, School of Medicine, Case Western Reserve University, Cleveland, Ohio
| | - Zhanwen Du
- Department of Radiation Oncology, School of Medicine, Case Western Reserve University, Cleveland, Ohio
| | - Yao Zhang
- Department of Radiation Oncology, School of Medicine, Case Western Reserve University, Cleveland, Ohio
| | - Pengyan Fa
- Department of Radiation Oncology, School of Medicine, Case Western Reserve University, Cleveland, Ohio
| | | | - Shanhuai Ma
- Department of Radiation Oncology, School of Medicine, Case Western Reserve University, Cleveland, Ohio
| | - Shunqiang Li
- Division of Oncology Breast Oncology Section, Washington University Medical School, St. Louis, Missouri
| | - Ceshi Chen
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences and Yunnan Province, Kunming Institute of Zoology, Kunming, Yunnan, China
| | - Hongbing Wang
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, Maryland
| | - Yan Xu
- Department of Chemistry, Cleveland State University, Cleveland, Ohio.,Case Comprehensive Cancer Center, School of Medicine, Case Western Reserve University, Cleveland, Ohio
| | - Chunhong Yan
- Georgia Cancer Center, Augusta University, Augusta, Georgia
| | - Keri Ruth
- Case Comprehensive Cancer Center, School of Medicine, Case Western Reserve University, Cleveland, Ohio.,Department of Pharmacology, School of Medicine, Case Western Reserve University, Cleveland, Ohio
| | - Zhefu Ma
- Department of Breast Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China. .,Department of Breast Surgery & Plastic Surgery, Cancer Hospital of China Medical University, Shenyang, China
| | - Junran Zhang
- Department of Radiation Oncology, School of Medicine, Case Western Reserve University, Cleveland, Ohio. .,Department of Radiation Oncology, The Ohio State University, Columbus, Ohio
| |
Collapse
|
26
|
Xiao X, Cao Y, Chen H. Profiling and characterization of microRNAs responding to sodium butyrate treatment in A549 cells. J Cell Biochem 2018; 119:3563-3573. [PMID: 29231270 DOI: 10.1002/jcb.26547] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Accepted: 11/30/2017] [Indexed: 01/01/2023]
Abstract
Butyrate inhibits growth of lung cancer. However, the molecular mechanism is still unclear. Here we profiled miRNAs that responded to sodium butyrate(NaB) stimulation in A549 cells, a non-small cell lung cancer cell line, using microarray. We found 33 up-regulated microRNAs and 22 down-regulated microRNAs (log2 ≥1.5 folds, P-value <0.05). The expression of miR-3935, miR-574-3p, and miR-494-3p was confirmed by realtime qPCR. Then,we explored their potential targets of miR-3935 and miR-494-3p using long noncoding RNA(LncRNA) microarray. Using cell expressing negative microRNA as control, we found 103 up-regulated transcripts (including 69 mRNA and 34 LncRNA), and 36 down-regulated transcripts (including 34 mRNAs and 2 LncRNA), in miR-3935 over-expressing A549 cells; 128 up-regulated transcripts (121 mRNAs, 7 LncRNAs) and 180 down-regulated transcripts (169 mRNAs, 11 LncRNAs) in mir-494-3p, respectively (log2 Fold change ≥ 1 & P < 0.05). The expression of RNF115, NTRK3, SLC39A6, and USB1 was confirmed with qPCR. Immunoblotting was adopted to detect RNF115 expression in miR-3935 overexpressed A549 cells. Then, using a luciferase reporter assay system, we found that miR-3935 overexpression significantly decreased 3UTR of RNF115 mediated luciferase expression .In addition, we also observed that the proliferation and migration of A549 cells was obviously prevented by miR-3935 overexpression. Finally, we showed miR-3935 and miR-494-3p induced interferon stimulated gene 15(ISG15) expression through activating its promoter transcription. Together, we profiled microRNAs that responded to NaB treatment and characterized their biological functions in A549 cells. Those results provided new clue for the future treatment of non small cell lung cancer.
Collapse
Affiliation(s)
- Xiaoqiang Xiao
- Joint Shantou International Eye Center, Shantou University and the Chinese University of Hong Kong, Shantou, China
| | - Yingjie Cao
- Joint Shantou International Eye Center, Shantou University and the Chinese University of Hong Kong, Shantou, China
| | - Haoyu Chen
- Joint Shantou International Eye Center, Shantou University and the Chinese University of Hong Kong, Shantou, China
| |
Collapse
|
27
|
Wang W, Qu M, Wang J, Zhang X, Zhang H, Wu J, Yu B, Wu H, Kong W, Yu X. Autoubiquitination of feline E3 ubiquitin ligase BCA2. Gene 2018; 638:1-6. [DOI: 10.1016/j.gene.2017.09.059] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Revised: 09/13/2017] [Accepted: 09/26/2017] [Indexed: 12/21/2022]
|
28
|
Wang D, Ma L, Wang B, Liu J, Wei W. E3 ubiquitin ligases in cancer and implications for therapies. Cancer Metastasis Rev 2017; 36:683-702. [DOI: 10.1007/s10555-017-9703-z] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
29
|
Kawaguchi T, Komatsu S, Ichikawa D, Hirajima S, Nishimura Y, Konishi H, Shiozaki A, Fujiwara H, Okamoto K, Tsuda H, Otsuji E. Overexpression of TRIM44 is related to invasive potential and malignant outcomes in esophageal squamous cell carcinoma. Tumour Biol 2017; 39:1010428317700409. [PMID: 28618928 DOI: 10.1177/1010428317700409] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Recent studies have shown that some members of the tripartite motif-containing protein family function as important regulators for carcinogenesis. In this study, we investigated whether tripartite motif-containing protein 44 acts as a cancer-promoting gene through its overexpression in esophageal squamous cell carcinoma. We analyzed esophageal squamous cell carcinoma cell lines to evaluate malignant potential and also analyzed 68 primary tumors to evaluate clinical relevance of tripartite motif-containing protein 44 protein in esophageal squamous cell carcinoma patients. Expression of the tripartite motif-containing protein 44 protein was detected in esophageal squamous cell carcinoma cell lines (8/14 cell lines; 57%) and primary tumor samples of esophageal squamous cell carcinoma (39/68 cases; 57%). Knockdown of tripartite motif-containing protein 44 expression in esophageal squamous cell carcinoma cells using several specific small interfering RNAs inhibited cell migration and invasion, but not cell proliferation. Immunohistochemical analysis demonstrated that the overexpression of the tripartite motif-containing protein 44 protein in the tumor infiltrated region was associated with the status of lymph node metastasis ( p = 0.049), and the overall survival rates were significantly worse among patients with tripartite motif-containing protein 44-overexpressing tumors than those with non-expressing tumors ( p = 0.029). Moreover, multivariate Cox regression model identified that overexpression of the tripartite motif-containing protein 44 protein was an independent worse prognostic factor (hazard ratio = 2.815; p = 0.041), as well as lymphatic invasion (hazard ratio = 2.735; p = 0.037). These results suggest that tripartite motif-containing protein 44 protein could play a crucial role in tumor invasion through its overexpression and highlight its usefulness as a predictor and potential therapeutic target in esophageal squamous cell carcinoma.
Collapse
Affiliation(s)
- Tsutomu Kawaguchi
- 1 Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Shuhei Komatsu
- 1 Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Daisuke Ichikawa
- 1 Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Shoji Hirajima
- 1 Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yukihisa Nishimura
- 1 Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hirotaka Konishi
- 1 Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Atsushi Shiozaki
- 1 Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hitoshi Fujiwara
- 1 Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kazuma Okamoto
- 1 Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hitoshi Tsuda
- 2 Department of Pathology, National Cancer Center Hospital, Tokyo, Japan.,3 Department of Basic Pathology, National Defense Medical College, Saitama, Japan
| | - Eigo Otsuji
- 1 Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| |
Collapse
|
30
|
BCA2/Rabring7 Interferes with HIV-1 Proviral Transcription by Enhancing the SUMOylation of IκBα. J Virol 2017; 91:JVI.02098-16. [PMID: 28122985 PMCID: PMC5375697 DOI: 10.1128/jvi.02098-16] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 01/18/2017] [Indexed: 12/18/2022] Open
Abstract
BCA2/Rabring7 is a BST2 cofactor that promotes the lysosomal degradation of trapped HIV-1 virions but also functions as a BST2-independent anti-HIV factor by targeting Gag for lysosomal degradation. Since many antiviral factors regulate the NF-κB innate signaling pathway, we investigated whether BCA2 is also connected to this proinflammatory cascade. Here, we show for the first time that BCA2 is induced by NF-κB-activating proinflammatory cytokines and that upregulation of BCA2 provides regulatory negative feedback on NF-κB. Specifically, BCA2 serves as an E3 SUMO ligase in the SUMOylation of IκBα, which in turn enhances the sequestration of NF-κB components in the cytoplasm. Since HIV-1 utilizes NF-κB to promote proviral transcription, the BCA2-mediated inhibition of NF-κB significantly decreases the transcriptional activity of HIV-1 (up to 4.4-fold in CD4+ T cells). Therefore, our findings indicate that BCA2 poses an additional barrier to HIV-1 infection: not only does BCA2 prevent assembly and release of nascent virions, it also significantly restricts HIV-1 transcription by inhibiting the NF-κB pathway.IMPORTANCE Understanding the interactions between HIV-1 and its host cells is highly relevant to the design of new drugs aimed at eliminating HIV-1 from infected individuals. We have previously shown that BCA2, a cofactor of BST2 in the restriction of HIV-1, also prevents virion assembly in a BST2-independent manner. In this study, we found that BCA2 negatively regulates the NF-κB pathway-a signaling cascade necessary for HIV-1 replication and infectivity-which in turn detrimentally affects proviral transcription and virus propagation. Thus, our results indicate that, besides its previously described functions as an antiviral factor, BCA2 poses an additional barrier to HIV-1 replication at the transcriptional level.
Collapse
|
31
|
Wymant JM, Hiscox S, Westwell AD, Urbé S, Clague MJ, Jones AT. The Role of BCA2 in the Endocytic Trafficking of EGFR and Significance as a Prognostic Biomarker in Cancer. J Cancer 2016; 7:2388-2407. [PMID: 27994678 PMCID: PMC5166551 DOI: 10.7150/jca.15055] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 08/14/2016] [Indexed: 12/24/2022] Open
Abstract
Breast Cancer Associated gene 2 (BCA2) is an E3 ubiquitin ligase that is over-expressed in >50% of primary breast cancers, and has been shown to increase in vitro cell proliferation and invasion. The protein has been linked to alterations in EGFR degradation; however there is some dispute as to its role and influence on the biology of this receptor. Our work aimed to ascertain the role of BCA2 in EGFR endocytosis and down-regulation and to examine its links with breast cancer outcome. Data generated with the online expression analysis tool KM-Plotter showed that high BCA2 levels are associated with poor prognosis in ovarian, gastric and breast cancer, particularly HER2 over-expressing breast cancers. Experimentally, we demonstrate that over-expression of BCA2 induced a reduction in total EGFR levels. BCA2 over-expressing cells stimulated with EGF exhibited reduced lysosomal degradation of both this ligand and its receptor. Signalling downstream of EGFR in BCA2 over-expressing cells was characterized by a lower magnitude but increased duration. Our findings support a role for BCA2 in receptor endocytosis. Consistent with this we show that BCA2 over-expression reduces the level of vesicle-associated Rab7, a regulator of late endocytosis and documented interaction partner of BCA2. Levels of transferrin receptor and the uptake of transferrin were unaltered by over-expression of BCA2 indicating that trafficking changes may be limited to late endocytic sorting events. This report offers a thorough exploration of BCA2 biology and suggests a context-dependent role for the protein in the endocytic regulation of EGFR and as a prognostic biomarker in cancer.
Collapse
Affiliation(s)
- Jennifer M Wymant
- Cardiff School of Pharmacy and Pharmaceutical Sciences, King Edward VII Avenue, Cardiff, CF10 3NB, Wales, U.K
| | - Stephen Hiscox
- Cardiff School of Pharmacy and Pharmaceutical Sciences, King Edward VII Avenue, Cardiff, CF10 3NB, Wales, U.K
| | - Andrew D Westwell
- Cardiff School of Pharmacy and Pharmaceutical Sciences, King Edward VII Avenue, Cardiff, CF10 3NB, Wales, U.K
| | - Sylvie Urbé
- Institute of Translational Medicine, University of Liverpool, Crown Street, Liverpool, L69 3BX, England, U.K
| | - Michael J Clague
- Institute of Translational Medicine, University of Liverpool, Crown Street, Liverpool, L69 3BX, England, U.K
| | - Arwyn T Jones
- Cardiff School of Pharmacy and Pharmaceutical Sciences, King Edward VII Avenue, Cardiff, CF10 3NB, Wales, U.K
| |
Collapse
|
32
|
Nass N, Dittmer A, Hellwig V, Lange T, Beyer JM, Leyh B, Ignatov A, Weiβenborn C, Kirkegaard T, Lykkesfeldt AE, Kalinski T, Dittmer J. Expression of transmembrane protein 26 (TMEM26) in breast cancer and its association with drug response. Oncotarget 2016; 7:38408-38426. [PMID: 27224909 PMCID: PMC5122400 DOI: 10.18632/oncotarget.9493] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 04/29/2016] [Indexed: 12/18/2022] Open
Abstract
We have previously shown that stromal cells desensitize breast cancer cells to the anti-estrogen fulvestrant and, along with it, downregulate the expression of TMEM26 (transmembrane protein 26). In an effort to study the function and regulation of TMEM26 in breast cancer cells, we found that breast cancer cells express non-glycosylated and N-glycosylated isoforms of the TMEM26 protein and demonstrate that N-glycosylation is important for its retention at the plasma membrane. Fulvestrant induced significant changes in expression and in the N-glycosylation status of TMEM26. In primary breast cancer, TMEM26 protein expression was higher in ERα (estrogen receptor α)/PR (progesterone receptor)-positive cancers. These data suggest that ERα is a major regulator of TMEM26. Significant changes in TMEM26 expression and N-glycosylation were also found, when MCF-7 and T47D cells acquired fulvestrant resistance. Furthermore, patients who received aromatase inhibitor treatment tend to have a higher risk of recurrence when tumoral TMEM26 protein expression is low. In addition, TMEM26 negatively regulates the expression of integrin β1, an important factor involved in endocrine resistance. Data obtained by spheroid formation assays confirmed that TMEM26 and integrin β1 can have opposite effects in breast cancer cells. These data are consistent with the hypothesis that, in ERα-positive breast cancer, TMEM26 may function as a tumor suppressor by impeding the acquisition of endocrine resistance. In contrast, in ERα-negative breast cancer, particularly triple-negative cancer, high TMEM26 expression was found to be associated with a higher risk of recurrence. This implies that TMEM26 has different functions in ERα-positive and -negative breast cancer.
Collapse
Affiliation(s)
- Norbert Nass
- Otto-von-Guericke-Universität Magdeburg, Institut für Pathologie, Magdeburg, Germany
| | - Angela Dittmer
- Klinik für Gynäkologie, Martin-Luther-Universität Halle-Wittenberg, Halle/Saale, Germany
| | - Vicky Hellwig
- Klinik für Gynäkologie, Martin-Luther-Universität Halle-Wittenberg, Halle/Saale, Germany
| | - Theresia Lange
- Klinik für Gynäkologie, Martin-Luther-Universität Halle-Wittenberg, Halle/Saale, Germany
| | - Johanna Mirjam Beyer
- Klinik für Gynäkologie, Martin-Luther-Universität Halle-Wittenberg, Halle/Saale, Germany
| | - Benjamin Leyh
- Klinik für Gynäkologie, Martin-Luther-Universität Halle-Wittenberg, Halle/Saale, Germany
| | - Atanas Ignatov
- Otto-von-Guericke-Universität Magdeburg, Universitätsfrauenklinik, Magdeburg, Germany
| | - Christine Weiβenborn
- Otto-von-Guericke-Universität Magdeburg, Universitätsfrauenklinik, Magdeburg, Germany
| | - Tove Kirkegaard
- Breast Cancer Group, Cell Death and Metabolism, Danish Cancer Society Research Center, Copenhagen, Denmark.,Present address: Department of Surgery, Koege Hospital, Koege, Denmark
| | - Anne E Lykkesfeldt
- Breast Cancer Group, Cell Death and Metabolism, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Thomas Kalinski
- Otto-von-Guericke-Universität Magdeburg, Institut für Pathologie, Magdeburg, Germany
| | - Jürgen Dittmer
- Klinik für Gynäkologie, Martin-Luther-Universität Halle-Wittenberg, Halle/Saale, Germany
| |
Collapse
|
33
|
Zhang J, Lachance V, Schaffner A, Li X, Fedick A, Kaye LE, Liao J, Rosenfeld J, Yachelevich N, Chu ML, Mitchell WG, Boles RG, Moran E, Tokita M, Gorman E, Bagley K, Zhang W, Xia F, Leduc M, Yang Y, Eng C, Wong LJ, Schiffmann R, Diaz GA, Kornreich R, Thummel R, Wasserstein M, Yue Z, Edelmann L. A Founder Mutation in VPS11 Causes an Autosomal Recessive Leukoencephalopathy Linked to Autophagic Defects. PLoS Genet 2016; 12:e1005848. [PMID: 27120463 PMCID: PMC4847778 DOI: 10.1371/journal.pgen.1005848] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 01/15/2016] [Indexed: 11/24/2022] Open
Abstract
Genetic leukoencephalopathies (gLEs) are a group of heterogeneous disorders with white matter abnormalities affecting the central nervous system (CNS). The causative mutation in ~50% of gLEs is unknown. Using whole exome sequencing (WES), we identified homozygosity for a missense variant, VPS11: c.2536T>G (p.C846G), as the genetic cause of a leukoencephalopathy syndrome in five individuals from three unrelated Ashkenazi Jewish (AJ) families. All five patients exhibited highly concordant disease progression characterized by infantile onset leukoencephalopathy with brain white matter abnormalities, severe motor impairment, cortical blindness, intellectual disability, and seizures. The carrier frequency of the VPS11: c.2536T>G variant is 1:250 in the AJ population (n = 2,026). VPS11 protein is a core component of HOPS (homotypic fusion and protein sorting) and CORVET (class C core vacuole/endosome tethering) protein complexes involved in membrane trafficking and fusion of the lysosomes and endosomes. The cysteine 846 resides in an evolutionarily conserved cysteine-rich RING-H2 domain in carboxyl terminal regions of VPS11 proteins. Our data shows that the C846G mutation causes aberrant ubiquitination and accelerated turnover of VPS11 protein as well as compromised VPS11-VPS18 complex assembly, suggesting a loss of function in the mutant protein. Reduced VPS11 expression leads to an impaired autophagic activity in human cells. Importantly, zebrafish harboring a vps11 mutation with truncated RING-H2 domain demonstrated a significant reduction in CNS myelination following extensive neuronal death in the hindbrain and midbrain. Thus, our study reveals a defect in VPS11 as the underlying etiology for an autosomal recessive leukoencephalopathy disorder associated with a dysfunctional autophagy-lysosome trafficking pathway. Genetic leukoencephalopathies (gLEs) are a group of heterogeneous disorders with white matter abnormalities in the central nervous system (CNS). Patients affected with gLEs have brain white matter defects that can be seen on MRI and exhibit variable neurologic phenotypes including motor impairment, hypotonia, pyramidal dysfunction, dystonia and/or dyskinesias, ataxia, seizures, cortical blindness, optic atrophy, and impaired cognitive development. The exact etiology of half of gLEs is unknown. We studied three unrelated families affected with an undiagnosed gLE and discovered a homozygous germline mutation c.2536T>G in VPS11, a gene involved in membrane trafficking and fusion of lysosomes and endosomes, as a novel cause of a new gLE syndrome. The mutation in VPS11 results in protein instability and impaired protein complex assembly. In addition, we show that VPS11 is required for proper autophagic activities in human cells. Importantly, we characterized a zebrafish line carrying a vps11 mutation and confirmed its essential role in brain white matter development and neuron survival.
Collapse
Affiliation(s)
- Jinglan Zhang
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
| | - Véronik Lachance
- Department of Neurology, The Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Adam Schaffner
- Department of Neurology, The Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Xianting Li
- Department of Neurology, The Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Anastasia Fedick
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Lauren E. Kaye
- Departments of Anatomy/Cell Biology and Ophthalmology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Jun Liao
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Jill Rosenfeld
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
| | - Naomi Yachelevich
- Clinical Genetics Services, New York University Hospitals Center, New York, New York, United States of America
| | - Mary-Lynn Chu
- Department of Neurology, New York University School of Medicine, New York, New York, United States of America
| | - Wendy G. Mitchell
- Neurology Division, Children's Hospital Los Angeles, Los Angeles, California, United States of America
| | - Richard G. Boles
- Division of Medical Genetics, Children's Hospital Los Angeles, Los Angeles, California, United States of America
- Courtagen Life Sciences, Woburn, Massachusetts, United States of America
| | - Ellen Moran
- Clinical Genetics Services, NYU Langone Hospital for Joint Diseases, New York, New York, United States of America
| | - Mari Tokita
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
| | - Elizabeth Gorman
- Baylor Miraca Genetics Laboratories, Houston, Texas, United States of America
| | - Kaytee Bagley
- Baylor Miraca Genetics Laboratories, Houston, Texas, United States of America
| | - Wei Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
| | - Fan Xia
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
| | - Magalie Leduc
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
| | - Yaping Yang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
| | - Christine Eng
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
| | - Lee-Jun Wong
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States of America
| | - Raphael Schiffmann
- Institute of Metabolic Disease, Baylor Research Institute, Dallas, Texas, United States of America
| | - George A. Diaz
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Ruth Kornreich
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Ryan Thummel
- Departments of Anatomy/Cell Biology and Ophthalmology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Melissa Wasserstein
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
| | - Zhenyu Yue
- Department of Neurology, The Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
- * E-mail: (ZY); (LE)
| | - Lisa Edelmann
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, United States of America
- * E-mail: (ZY); (LE)
| |
Collapse
|
34
|
Arkwright RT, Deshmukh R, Adapa N, Stevens R, Zonder E, Zhang Z, Farshi P, Ahmed RSI, El-Banna HA, Chan TH, Dou QP. Lessons from Nature: Sources and Strategies for Developing AMPK Activators for Cancer Chemotherapeutics. Anticancer Agents Med Chem 2016; 15:657-71. [PMID: 25511514 DOI: 10.2174/1871520615666141216145417] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 09/17/2014] [Accepted: 11/17/2014] [Indexed: 12/31/2022]
Abstract
Adenosine Monophosphate-Activated Protein Kinase or AMPK is a highly-conserved master-regulator of numerous cellular processes, including: Maintaining cellular-energy homeostasis, modulation of cytoskeletaldynamics, directing cell growth-rates and influencing cell-death pathways. AMPK has recently emerged as a promising molecular target in cancer therapy. In fact, AMPK deficiencies have been shown to enhance cell growth and proliferation, which is consistent with enhancement of tumorigenesis by AMPK-loss. Conversely, activation of AMPK is associated with tumor growth suppression via inhibition of the Mammalian Target of Rapamycin Complex-1 (mTORC1) or the mTOR signal pathway. The scientific communities' recognition that AMPK-activating compounds possess an anti-neoplastic effect has contributed to a rush of discoveries and developments in AMPK-activating compounds as potential anticancer-drugs. One such example is the class of compounds known as Biguanides, which include Metformin and Phenformin. The current review will showcase natural compounds and their derivatives that activate the AMPK-complex and signaling pathway. In addition, the biology and history of AMPK-signaling and AMPK-activating compounds will be overviewed, their anticancer-roles and mechanisms-of-actions will be discussed, and potential strategies for the development of novel, selective AMPK-activators with enhanced efficacy and reduced toxicity will be proposed.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Q Ping Dou
- Barbara Ann Karmanos Cancer Institute and Department of Oncology, School of Medicine, Wayne State University, 540.1 HWCRC, 4100 John R Road, Detroit, MI 48201- 2013.
| |
Collapse
|
35
|
Cilibrasi V, Tsang K, Morelli M, Solfa F, Wiggins HL, Jones AT, Westwell AD. Synthesis of substituted carbamo(dithioperoxo)thioates as potential BCA2-inhibitory anticancer agents. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.03.132] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
36
|
Lee YH, Sun Y, Gerweck LE, Glickman RD. Regulation of DNA Damage Response by Estrogen Receptor β-Mediated Inhibition of Breast Cancer Associated Gene 2. Biomedicines 2015; 3:182-200. [PMID: 28536406 PMCID: PMC5344223 DOI: 10.3390/biomedicines3020182] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 03/26/2015] [Accepted: 04/13/2015] [Indexed: 12/22/2022] Open
Abstract
Accumulating evidence suggests that ubiquitin E3 ligases are involved in cancer development as their mutations correlate with genomic instability and genetic susceptibility to cancer. Despite significant findings of cancer-driving mutations in the BRCA1 gene, estrogen receptor (ER)-positive breast cancers progress upon treatment with DNA damaging-cytotoxic therapies. In order to understand the underlying mechanism by which ER-positive breast cancer cells develop resistance to DNA damaging agents, we employed an estrogen receptor agonist, Erb-041, to increase the activity of ERβ and negatively regulate the expression and function of the estrogen receptor α (ERα) in MCF-7 breast cancer cells. Upon Erb-041-mediated ERα down-regulation, the transcription of an ERα downstream effector, BCA2 (Breast Cancer Associated gene 2), correspondingly decreased. The ubiquitination of chromatin-bound BCA2 was induced by ultraviolet C (UVC) irradiation but suppressed by Erb-041 pretreatment, resulting in a blunted DNA damage response. Upon BCA2 silencing, DNA double-stranded breaks increased with Rad51 up-regulation and ataxia telangiectasia mutated (ATM) activation. Mechanistically, UV-induced BCA2 ubiquitination and chromatin binding were found to promote DNA damage response and repair via the interaction of BCA2 with ATM, γH2AX and Rad51. Taken together, this study suggests that Erb-041 potentiates BCA2 dissociation from chromatin and co-localization with Rad51, resulting in inhibition of homologous recombination repair.
Collapse
Affiliation(s)
- Yuan-Hao Lee
- Department of Radiology, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA.
| | - Youping Sun
- Department of Radiation Oncology, Center for Radiological Research, Columbia University Medical Center, New York, NY 10032, USA.
| | - Leo E Gerweck
- Department of Radiation Oncology, Massachusetts General Hospital, Boston, MA 02114, USA.
| | - Randolph D Glickman
- Department of Ophthalmology, Center for Biomedical Neuroscience, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA.
| |
Collapse
|
37
|
Obrist F, Manic G, Kroemer G, Vitale I, Galluzzi L. Trial Watch: Proteasomal inhibitors for anticancer therapy. Mol Cell Oncol 2015; 2:e974463. [PMID: 27308423 PMCID: PMC4904962 DOI: 10.4161/23723556.2014.974463] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Revised: 09/15/2014] [Accepted: 09/17/2014] [Indexed: 01/12/2023]
Abstract
The so-called "ubiquitin-proteasome system" (UPS) is a multicomponent molecular apparatus that catalyzes the covalent attachment of several copies of the small protein ubiquitin to other proteins that are generally (but not always) destined to proteasomal degradation. This enzymatic cascade is crucial for the maintenance of intracellular protein homeostasis (both in physiological conditions and in the course of adaptive stress responses), and regulates a wide array of signaling pathways. In line with this notion, defects in the UPS have been associated with aging as well as with several pathological conditions including cardiac, neurodegenerative, and neoplastic disorders. As transformed cells often experience a constant state of stress (as a result of the hyperactivation of oncogenic signaling pathways and/or adverse microenvironmental conditions), their survival and proliferation are highly dependent on the integrity of the UPS. This rationale has driven an intense wave of preclinical and clinical investigation culminating in 2003 with the approval of the proteasomal inhibitor bortezomib by the US Food and Drug Administration for use in multiple myeloma patients. Another proteasomal inhibitor, carfilzomib, is now licensed by international regulatory agencies for use in multiple myeloma patients, and the approved indications for bortezomib have been extended to mantle cell lymphoma. This said, the clinical activity of bortezomib and carfilzomib is often limited by off-target effects, innate/acquired resistance, and the absence of validated predictive biomarkers. Moreover, the antineoplastic activity of proteasome inhibitors against solid tumors is poor. In this Trial Watch we discuss the contribution of the UPS to oncogenesis and tumor progression and summarize the design and/or results of recent clinical studies evaluating the therapeutic profile of proteasome inhibitors in cancer patients.
Collapse
Affiliation(s)
- Florine Obrist
- Université Paris-Sud/Paris XI; Le Kremlin-Bicêtre, France
- INSERM, U1138; Paris, France
- Equipe 11 labelisée par la Ligue Nationale contre le Cancer, Center de Recherche des Cordeliers; Paris, France
- Gustave Roussy Cancer Campus; Villejuif, France
| | | | - Guido Kroemer
- INSERM, U1138; Paris, France
- Equipe 11 labelisée par la Ligue Nationale contre le Cancer, Center de Recherche des Cordeliers; Paris, France
- Université Paris Descartes/Paris V; Sorbonne Paris Cité; Paris, France
- Pôle de Biologie, Hôpital Européen Georges Pompidou; Paris, France
- Metabolomics and Cell Biology Platforms; Gustave Roussy Cancer Campus; Villejuif, France
| | - Ilio Vitale
- Regina Elena National Cancer Institute; Rome, Italy
- Department of Biology, University of Rome “Tor Vergata”
| | - Lorenzo Galluzzi
- INSERM, U1138; Paris, France
- Equipe 11 labelisée par la Ligue Nationale contre le Cancer, Center de Recherche des Cordeliers; Paris, France
- Gustave Roussy Cancer Campus; Villejuif, France
- Université Paris Descartes/Paris V; Sorbonne Paris Cité; Paris, France
| |
Collapse
|
38
|
Regulation of metformin response by breast cancer associated gene 2. Neoplasia 2014; 15:1379-90. [PMID: 24403860 DOI: 10.1593/neo.131434] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Revised: 10/30/2013] [Accepted: 11/06/2013] [Indexed: 12/19/2022] Open
Abstract
Adenosine monophosphate-activated protein kinase (AMPK), a master regulator of cellular energy homeostasis, has emerged as a promising molecular target in the prevention of breast cancer. Clinical trials using the United States Food and Drug Administration (FDA)-approved, AMPK-activating, antidiabetic drug metformin are promising in this regard, but the question of why metformin is protective for some women but not others still remains. Breast cancer associated gene 2 (BCA2/Rabring7/RNF115), a novel Really Interesting New Gene (RING) finger ubiquitin E3 ligase, is overexpressed in >50% of breast tumors. Herein, we report that BCA2 is an endogenous inhibitor of AMPK activation in breast cancer cells and that BCA2 inhibition increases the efficacy of metformin. BCA2 overexpression inhibited both basal and inducible Thr172 phosphorylation/activation of AMPKα1, while BCA2-specific small interfering RNA (siRNA) enhanced phosphorylated AMPKα1 (pAMPKα1). The AMPK-suppressive function of BCA2 requires its E3 ligase-specific RING domain, suggesting that BCA2 targets some protein controlling (de)phosphorylation of AMPKα1 for degradation. Activation of AMPK by metformin triggered a growth inhibitory signal but also increased BCA2 protein levels, which correlated with AKT activation and could be curbed by an AMPK inhibitor, suggesting a potential feedback mechanism from pAMPKα1 to pAkt to BCA2. Finally, BCA2 siRNA, or inhibition of its upstream stabilizing kinase AKT, increased the growth inhibitory effect of metformin in multiple breast cancer cell lines, supporting the conclusion that BCA2 weakens metformin's efficacy. Our data suggest that metformin in combination with a BCA2 inhibitor may be a more effective breast cancer treatment strategy than metformin alone.
Collapse
|
39
|
Nityanandam R, Serra-Moreno R. BCA2/Rabring7 targets HIV-1 Gag for lysosomal degradation in a tetherin-independent manner. PLoS Pathog 2014; 10:e1004151. [PMID: 24852021 PMCID: PMC4031200 DOI: 10.1371/journal.ppat.1004151] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Accepted: 04/14/2014] [Indexed: 12/04/2022] Open
Abstract
BCA2 (Rabring7, RNF115 or ZNF364) is a RING-finger E3 ubiquitin ligase that was identified as a co-factor in the restriction imposed by tetherin/BST2 on HIV-1. Contrary to the current model, in which BCA2 lacks antiviral activity in the absence of tetherin, we found that BCA2 possesses tetherin-independent antiviral activity. Here we show that the N-terminus of BCA2 physically interacts with the Matrix region of HIV-1 and other retroviral Gag proteins and promotes their ubiquitination, redistribution to endo-lysosomal compartments and, ultimately, lysosomal degradation. The targeted depletion of BCA2 in tetherin-expressing and tetherin-deficient cells results in a significant increase in virus release and replication, indicating that endogenous BCA2 possesses antiviral activity. Therefore, these results indicate that BCA2 functions as an antiviral factor that targets HIV-1 Gag for degradation, impairing virus assembly and release. Tetherin (also known as BST2, CD317 or HM1.24) is an interferon-inducible cellular factor that interferes with the release of enveloped viruses from infected cells. A recent study identified BCA2 (Breast Cancer-Associated gene 2, also known as RNF115, ZNF364 or Rabring7), a RING-finger E3 ubiquitin ligase, as a co-factor in the tetherin-mediated restriction of HIV-1. According to this model, BCA2 interacts with sequences in the N-terminus of tetherin to promote the internalization and lysosomal degradation of tethered HIV-1 particles, with no apparent antiviral activity in cells not expressing tetherin. However, here we show for the first time that BCA2 inhibits virus production for HIV-1 and other retroviruses in a tetherin-independent manner by reducing the cellular levels of Gag – the precursor of the structural proteins Matrix, Capsid, Nucleocapsid and p6. Hence, contrary to its reported role as a tetherin co-factor, BCA2 functions as a tetherin-independent antiviral factor that impairs virus assembly and release.
Collapse
Affiliation(s)
- Ramya Nityanandam
- Division of Immunology, New England Primate Research Center, Harvard Medical School, Southborough, Massachusetts, United States of America
| | - Ruth Serra-Moreno
- Division of Immunology, New England Primate Research Center, Harvard Medical School, Southborough, Massachusetts, United States of America
- * E-mail:
| |
Collapse
|
40
|
RNF115/BCA2 E3 ubiquitin ligase promotes breast cancer cell proliferation through targeting p21Waf1/Cip1 for ubiquitin-mediated degradation. Neoplasia 2014; 15:1028-35. [PMID: 24027428 DOI: 10.1593/neo.13678] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Revised: 07/16/2013] [Accepted: 07/24/2013] [Indexed: 11/18/2022] Open
Abstract
The E3 ubiquitin ligase RING finger protein 115 (RNF115), also known as breast cancer-associated gene 2 (BCA2), has previously been reported to be overexpressed in estrogen receptor α (ERα)-positive breast tumors and to promote breast cell proliferation; however, its mechanism is unknown. In this study, we demonstrated that silencing of BCA2 by small interfering RNAs (siRNAs) in two ERα-positive breast cancer cell lines, MCF-7 and T47D, decreases cell proliferation and increases the protein levels of the cyclin-dependent kinase inhibitor p21Waf/Cip1. The protein stability of p21 was negatively regulated by BCA2. BCA2 directly interacts with p21 and promotes p21 ubiquitination and proteasomal degradation. Knockdown of p21 partially rescues the cell growth arrest induced by the BCA2 siRNA. These results suggest that BCA2 promotes ERα-positive breast cancer cell proliferation at least partially through downregulating the expression of p21.
Collapse
|
41
|
Aguilar-Hernández V, Guzmán P. Spliceosomal introns in the 5' untranslated region of plant BTL RING-H2 ubiquitin ligases are evolutionary conserved and required for gene expression. BMC PLANT BIOLOGY 2013; 13:179. [PMID: 24228887 PMCID: PMC4225707 DOI: 10.1186/1471-2229-13-179] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Accepted: 11/11/2013] [Indexed: 05/09/2023]
Abstract
BACKGROUND Introns located close to the 5' end of a gene or in the 5' untranslated region often exert positive effects on gene expression. This effect, known as intron-mediated enhancement (IME), has been observed in diverse eukaryotic organisms, including plants. The sequences involved in IME seem to be spread across the intron and function in an additive manner. The IMEter algorithm was developed to predict plant introns that may enhance gene expression. We have identified several plant members of the BTL class of E3s, which may have orthologs across eukaryotes, that contain a 5'UTR intron. The RING finger E3 ligases are key enzymes of the ubiquitination system that mediate the transfer of ubiquitin to substrates. RESULTS In this study, we retrieved BTL sequences from several angiosperm species and found that 5'UTR introns showing a strong IMEter score were predicted, suggesting that they may be conserved by lineage. Promoter-GUS fusion lines were used to confirm the IME effect of these 5'UTR introns on gene expression. IMEter scores of BTLs were compared with the 5'UTR introns of two gene families MHX and polyubiquitin genes. CONCLUSIONS Analysis performed in two Arabidopsis BTL E3 ligases genes indicated that the 5'UTR introns were essential for gene expression in all the tissues tested. Comparison of the average 5'UTR intron size on three gene families in ten angiosperm species suggests that a prevalent size for a 5'UTR intron is in the range of 600 nucleotides, and that the overall IMEter score within a gene family is preserved across several angiosperms. Our results indicated that gene expression dependent on a 5'UTR intron is an efficient regulatory mechanism in BTL E3 ligases that has been preserved throughout plant evolution.
Collapse
Affiliation(s)
- Victor Aguilar-Hernández
- Departamento de Ingeniería Genética, Centro de Investigación y de Estudios Avanzados, Unidad Irapuato, Apartado Postal 629, Irapuato, Gto 36821, Mexico
| | - Plinio Guzmán
- Departamento de Ingeniería Genética, Centro de Investigación y de Estudios Avanzados, Unidad Irapuato, Apartado Postal 629, Irapuato, Gto 36821, Mexico
| |
Collapse
|
42
|
Lee YM, Lin YF, Lim C. Factors Controlling the Role of Zn and Reactivity of Zn-bound Cysteines in Proteins: Application to Drug Target Discovery. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201300392] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
43
|
Aguilar-Hernández V, Medina J, Aguilar-Henonin L, Guzmán P. Expansion and diversification of BTL ring-H2 ubiquitin ligases in angiosperms: putative Rabring7/BCA2 orthologs. PLoS One 2013; 8:e72729. [PMID: 23951330 PMCID: PMC3738576 DOI: 10.1371/journal.pone.0072729] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Accepted: 07/11/2013] [Indexed: 12/26/2022] Open
Abstract
RING finger E3 ligases are components of the ubiquitin proteasome system (UPS) that mediate the transfer of ubiquitin to substrates. Single-subunit RING finger E3s binds the E2 ubiquitin-conjugating enzyme and contains recognition sequences for the substrate within the same polypeptide. Here we describe the characterization of a class of RING finger E3 ligases that is conserved among eukaryotes. This class encodes a RING-H2 domain related in sequence to the ATL RING-H2 domain, another class of E3 ligases, and a C2/C2 zing finger at the amino-terminus, formerly described as BZF. In viridiplantae (green algae and land plants), we designed this family as BTL for BZF ATLs. BTLs are putative orthologs of the mammalian Rabring7/BCA2 RING-H2 E3s that have expanded in angiosperms. They are found in numbers ranging from three to thirty-one, which is in contrast to the one to three members normally found in animals, fungi, and protists. Furthermore, the number of sequence LOGOs generated in angiosperms is four times greater than that in other eukaryotes. In contrast to ATLs, which show expansion by tandem duplication, tandemly duplicated BTLs are scarce. The mode of action of Rabring7/BCA2 and BTLs may be similar since both the Rabring7/BCA2 BZF and the ath|BTL4 BZF are likely to mediate the binding of ubiquitin. This study introduces valuable information on the evolution and domain structure of the Rabring7/BCA2/BTL class of E3 ligases which may be important for core eukaryotic genes.
Collapse
Affiliation(s)
- Victor Aguilar-Hernández
- Departamento de Ingeniería Genética de Plantas, Centro de Investigación y de Estudios Avanzados, Unidad Irapuato, Irapuato, Guanajuato, México
| | - Juliana Medina
- Departamento de Ingeniería Genética de Plantas, Centro de Investigación y de Estudios Avanzados, Unidad Irapuato, Irapuato, Guanajuato, México
| | - Laura Aguilar-Henonin
- Departamento de Ingeniería Genética de Plantas, Centro de Investigación y de Estudios Avanzados, Unidad Irapuato, Irapuato, Guanajuato, México
| | - Plinio Guzmán
- Departamento de Ingeniería Genética de Plantas, Centro de Investigación y de Estudios Avanzados, Unidad Irapuato, Irapuato, Guanajuato, México
- * E-mail:
| |
Collapse
|
44
|
Buac D, Schmitt S, Ventro G, Kona FR, Dou QP. Dithiocarbamate-based coordination compounds as potent proteasome inhibitors in human cancer cells. Mini Rev Med Chem 2013; 12:1193-201. [PMID: 22931591 DOI: 10.2174/138955712802762040] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 02/02/2012] [Accepted: 02/06/2012] [Indexed: 01/01/2023]
Abstract
Dithiocarbamates are a class of metal-chelating compounds with various applications in medicine. They have been used for the treatment of bacterial and fungal infections, possible treatment of AIDS, and most recently cancer. Their anti-tumor effects can in part be attributed to their ability to complex tumor cellular copper, leading to binding to and inhibition of the proteasome and in turn initiating tumor cell-specific apoptosis. Current chemotherapeutic agents are highly toxic and therefore their efficacy in the eradication of tumors is greatly limited. As a result many scientists have joined the quest for novel targeted therapies in hopes of reducing toxicity while maximizing potency and proteasome inhibition has become an attractive therapy in this regard. Here we discuss the origins, mechanism, and evolution of dithiocarbamates as potent proteasome inhibitors and therefore anti-cancer agents.
Collapse
Affiliation(s)
- Daniela Buac
- Departments of Oncology, Pharmacology and Pathology, and Developmental Therapeutics Program, Barbara Ann Karmanos Cancer Institute, Wayne State University School of Medicine, 4100 John R Street Hudson Webber Cancer Research Center Room 516, Detroit, MI 48201, USA
| | | | | | | | | |
Collapse
|
45
|
Smith CJ, Berry DM, McGlade CJ. The E3 ubiquitin ligases RNF126 and Rabring7 regulate endosomal sorting of the epidermal growth factor receptor. J Cell Sci 2013; 126:1366-80. [PMID: 23418353 DOI: 10.1242/jcs.116129] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Activation of the epidermal growth factor receptor (EGFR) results in internalization and ubiquitin-dependent endosomal sorting, leading to lysosomal degradation. Here we describe the role of the RING-finger-domain-containing protein RNF126 and the related protein, Rabring7 in EGFR endosomal sorting. We demonstrate that RNF126 specifies K48-linked chains with UbcH5b and also functions with Ubc13/Uev1a to form K63-linked chains in vitro. RNF126 and Rabring7 associate with the EGFR through a ubiquitin-binding zinc finger domain and both E3 ubiquitin ligases promote ubiquitylation of EGFR. In the absence of c-Cbl or in cells expressing Cbl-70Z, the binding of RNF126 and Rabring7 to the EGFR is reduced, suggesting that RNF126 and Rabring7 function downstream of c-Cbl. In HeLa cells depleted of either RNF126 or Rabring7 the EGFR is retained in a late endocytic compartment and is inefficiently degraded. In addition, depletion of RNF126 or Rabring7 destabilizes ESCRT-II and reduces the number of multivesicular bodies formed after EGF stimulation. We also show that the depletion of Rabring7 attenuates the degradation of MET and that both RNF126 and Rabring7 regulate the sorting of CXCR4 from an early endocytic compartment. Together these data suggest that RNF126 and Rabring7 play a role in the ubiquitin-dependent sorting and downregulation of membrane receptors.
Collapse
Affiliation(s)
- Christopher J Smith
- Department of Medical Biophysics, University of Toronto, 610 University Avenue, Toronto, ON, M5G 2M9, Canada
| | | | | |
Collapse
|
46
|
BCA2 is differentially expressed in renal oncocytoma: an analysis of 158 renal neoplasms. Tumour Biol 2012; 34:787-91. [DOI: 10.1007/s13277-012-0608-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Accepted: 11/22/2012] [Indexed: 10/27/2022] Open
|
47
|
Zhi X, Zhao D, Wang Z, Zhou Z, Wang C, Chen W, Liu R, Chen C. E3 ubiquitin ligase RNF126 promotes cancer cell proliferation by targeting the tumor suppressor p21 for ubiquitin-mediated degradation. Cancer Res 2012; 73:385-94. [PMID: 23026136 DOI: 10.1158/0008-5472.can-12-0562] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
To identify novel oncogenic E3 ubiquitin ligases as anticancer targets, we screened an E3 ubiquitin ligase siRNA library containing siRNA pools against 555 individual E3s using the sulphorhodamine B assay in the MDA-MB-231 breast cancer cell line and the PC3 prostate cancer cell line. RNF126 was identified and validated as a candidate from this screening. Knockdown of RNF126 dramatically decreased cell viability in these cancer cell lines. Consistently, RNF126 knockdown delayed cell-cycle G(1)-S progression and decreased cell proliferation. Using protein array analysis we found that RNF126 silencing increased cell-cycle dependent kinase inhibitor p21(cip) protein levels in both MDA-MB-231 and PC3. Knockdown of RNF126 stabilized the p21 protein rather than increased p21 mRNA levels. We showed that RNF126 interacts with p21 and RNF126 overexpression increased p21 protein ubiquitination in an E3 ligase activity-dependent manner. RNF126 knockdown induced loss of cell viability in MDA-MB-231 and PC-3 can be partially rescued by depletion of p21. RNF126 stable knockdown in PC3 inhibited tumor growth in SCID mice. Finally, we found that RNF126 is highly expressed in a subset of breast cancer cell lines and negatively correlated with p21 expression levels. These findings suggest that RNF126 promotes cancer cell proliferation by targeting p21 for ubiquitin-mediated degradation. RNF126 could be a novel therapeutic target in breast and prostate cancers.
Collapse
Affiliation(s)
- Xu Zhi
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences & Yunnan Province, Kunming Institute of Zoology, Kunming Institute of Zoology, Kunming, Yunnan, China
| | | | | | | | | | | | | | | |
Collapse
|
48
|
Transcriptional activation of breast cancer-associated gene 2 by estrogen receptor. Breast Cancer Res Treat 2012; 135:495-503. [PMID: 22850893 DOI: 10.1007/s10549-012-2107-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2012] [Accepted: 05/18/2012] [Indexed: 12/13/2022]
Abstract
RNF115, or Breast Cancer-Associated Gene 2 (BCA2), encodes a RING-finger ubiquitin E3 ligase, expression of which was associated with estrogen receptor (ER)-positive status in human breast tumors. Although the BCA2 promoter contains several estrogen response element (ERE) half-sites, the role of ER in the regulation of BCA2 transcription has not been reported. The aim of this study is to investigate the molecular mechanism by which estrogen regulates BCA2 transcription. BCA2 mRNA and protein levels were examined by RT-PCR and Western blot analysis, respectively, and localization was assessed by immunofluorescence. BCA2 promoter activity in response to E(2) was tested by a dual luciferase reporter assay and ER binding to the BCA2 promoter was examined by chromatin immunoprecipitation assay. We found that BCA2 mRNA and protein levels are regulated by estrogen in ER-positive MCF7 breast cancer cells and MDA MB 231 cells stably transfected with ER. Estrogen treatment in hormonal depleted MCF7 and MDA MB 231/ER stably transfected cells resulted in increased nuclear ER and cytoplasmic and nuclear BCA2 staining. Cycloheximide is not able to inhibit BCA2 mRNA levels, suggesting potential BCA2 regulation at the transcriptional level. Anti-estrogens like tamoxifen and ICI 182 178 counteracted E(2)-induced BCA2 protein and knockdown of ER by ER siRNA resulted in a significant decrease in BCA2 protein and a lower nuclear expression pattern. Estrogen treatment lead to a significant increase in BCA2 promoter response, associated with increased binding of ER to the ERE region of the BCA2 promoter. BCA2 is therefore a newly identified transcriptional target of estrogen receptor.
Collapse
|
49
|
Narita R, Kitaura H, Torii A, Tashiro E, Miyazawa M, Ariga H, Iguchi-Ariga SMM. Rabring7 degrades c-Myc through complex formation with MM-1. PLoS One 2012; 7:e41891. [PMID: 22844532 PMCID: PMC3402419 DOI: 10.1371/journal.pone.0041891] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Accepted: 06/29/2012] [Indexed: 11/18/2022] Open
Abstract
We have reported that a novel c-Myc-binding protein, MM-1, repressed E-box-dependent transcription and transforming activities of c-Myc and that a mutation of A157R in MM-1, which is often observed in patients with leukemia or lymphoma, abrogated all of the repressive activities of MM-1 toward c-Myc, indicating that MM-1 is a novel tumor suppressor. MM-1 also binds to the ubiquitin-proteasome system, leading to degradation of c-Myc. In this study, we identified Rabring7, a Rab7-binding and RING finger-containing protein, as an MM-1-binding protein, and we found that Rabring7 mono-ubiquitinated MM-1 in the cytoplasm without degradation of MM-1. Rabring7 was also found to bind to c-Myc and to ubiquitinate c-Myc in a threonine 58-dependent manner. When c-Myc was co-transfected with MM-1 and Rabring7, c-Myc was degraded. Furthermore, it was found that c-Myc was stabilized in MM-1-knockdown cells even when Rabring7 was transfected and that Rabring7 was bound to and co-localized with MM-1 and c-Myc after MM-1 and Rabring7 had been translocated from the cytoplasm to the nucleus. These results suggest that Rabring7 stimulates c-Myc degradation via mono-ubiquitination of MM-1.
Collapse
Affiliation(s)
- Rina Narita
- Graduate School of Agriculture, Hokkaido University, Sapporo, Japan
| | - Hirotake Kitaura
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Ayako Torii
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Erika Tashiro
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Makoto Miyazawa
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Hiroyoshi Ariga
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
- * E-mail: (HA); (SMMIA)
| | | |
Collapse
|
50
|
Bacopulos S, Amemiya Y, Yang W, Zubovits J, Burger A, Yaffe M, Seth AK. Effects of partner proteins on BCA2 RING ligase activity. BMC Cancer 2012; 12:63. [PMID: 22315970 PMCID: PMC3298473 DOI: 10.1186/1471-2407-12-63] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Accepted: 02/08/2012] [Indexed: 01/12/2023] Open
Abstract
Background BCA2 is an E3 ligase linked with hormone responsive breast cancers. We have demonstrated previously that the RING E3 ligase BCA2 has autoubiquitination activity and is a very unstable protein. Previously, only Rab7, tetherin, ubiquitin and UBC9 were known to directly interact with BCA2. Methods Here, additional BCA2 binding proteins were found using yeast two-hybrid and bacterial-II-hybrid screening techniques with Human breast and HeLa cDNA libraries. Co-expression of these proteins was analyzed through IHC of TMAs. Investigation of the molecular interactions and effects were examined through a series of in vivo and in vitro assays. Results Ten unique BCA2 interacting proteins were identified, two of which were hHR23a and 14-3-3sigma. Both hHR23a and 14-3-3sigma are co-expressed with BCA2 in breast cancer cell lines and patient breast tumors (n = 105). hHR23a and BCA2 expression was significantly correlated (P = < 0.0001 and P = 0.0113) in both nucleus and cytoplasm. BCA2 expression showed a statistically significant correlation with tumor grade. High cytoplasmic hHR23a trended towards negative nodal status. Binding to BCA2 by hHR23a and 14-3-3sigma was confirmed in vitro using tagged partner proteins and BCA2. hHR23a and 14-3-3sigma effect the autoubiquitination and auto-degradation activity of BCA2. Ubiquitination of hHR23a-bound BCA2 was found to be dramatically lower than that of free BCA2, suggesting that hHR23a promotes the stabilization of BCA2 by inactivating its autoubiquitination activity, without degradation of hHR23a. On the other hand, phosphorylated BCA2 protein is stabilized by interaction with 14-3-3sigma both with and without proteasome inhibitor MG-132 suggesting that BCA2 is regulated by multiple degradation pathways. Conclusions The interaction between BCA2 and hHR23a in breast cancer cells stabilizes BCA2. High expression of BCA2 is correlated with grade in breast cancer, suggesting regulation of this E3 ligase is important to cancer progression.
Collapse
|