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Morisaka H, Takaishi M, Akira S, Sano S. Keratinocyte Regnase-1, a Downregulator of Skin Inflammation, Contributes to Protection against Tumor Promotion by Limiting Cyclooxygenase-2 Expression. J Invest Dermatol 2022; 143:731-739. [PMID: 36470473 DOI: 10.1016/j.jid.2022.11.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 10/07/2022] [Accepted: 11/01/2022] [Indexed: 12/12/2022]
Abstract
We previously showed that the ribonuclease Regnase-1 (Reg1) in keratinocytes plays a role in mitigating skin inflammation by downregulating proinflammatory cytokines. In this study, we explored whether Reg1 also has a protective role against skin carcinogenesis. The chemically induced two-stage carcinogenesis protocol revealed that epidermis-specific Reg1-deficient (Reg1-knockout [Reg1-cKO]) mice developed skin tumors with shorter latency and more multiplicity than control mice. In addition, repeated UVB irradiation readily provoked solar keratosis-like lesions in Reg1-cKO mice. Increased levels of cyclooxygenase 2, whose mRNA (Ptgs2) is reportedly a target of Reg1, have been known to be associated with the development of squamous cell carcinomas. Indeed, Ptgs2 mRNA levels were upregulated in the skin of Reg1-cKO mice after treatment with the tumor promoter 12-O-tetradecanoylphorbol-13-acetate. The level of prostaglandin E2 was higher in 12-O-tetradecanoylphorbol-13-acetate‒treated Reg1-cKO mouse skin than in control mice skin. Moreover, in vivo inhibition of cyclooxygenase 2 attenuated the 12-O-tetradecanoylphorbol-13-acetate‒induced epidermal thickening in Reg1-cKO mice. Finally, REG1 knockdown in human squamous cell carcinomas lines enhanced PTGS2 mRNA levels after 12-O-tetradecanoylphorbol-13-acetate treatment. In conclusion, epidermal Reg1 plays a regulatory role not only in skin inflammation but also in tumor promotion through the downregulation of cyclooxygenase 2. Therefore, forced expression of Reg1 under inflammatory conditions may be relevant to preventing skin cancer.
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Affiliation(s)
- Hiroyuki Morisaka
- Department of Dermatology, Kochi Medical School, Kochi University, Nankoku, Japan
| | - Mikiro Takaishi
- Department of Dermatology, Kochi Medical School, Kochi University, Nankoku, Japan
| | - Shizuo Akira
- Laboratory of Host Defense, Immunology Frontier Research Center, World Premier Institute for Immunology, Osaka University, Suita, Japan; Department of Host Defense, Research Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Shigetoshi Sano
- Department of Dermatology, Kochi Medical School, Kochi University, Nankoku, Japan.
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2
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MCPIP1 alleviates inflammatory response through inducing autophagy in Aspergillus fumigatus keratitis. Int Immunopharmacol 2022; 113:109279. [DOI: 10.1016/j.intimp.2022.109279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 09/21/2022] [Accepted: 09/21/2022] [Indexed: 11/05/2022]
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3
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Yang Y, Zhao J, Zhang Y, Feng T, Yv B, Wang J, Gao Y, Yin M, Tang J, Li Y. MYCN protein stability is a better prognostic indicator in neuroblastoma. BMC Pediatr 2022; 22:404. [PMID: 35820898 PMCID: PMC9277955 DOI: 10.1186/s12887-022-03449-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Accepted: 06/23/2022] [Indexed: 11/17/2022] Open
Abstract
Objective MYCN oncogene amplification is associated with treatment failure and poor prognosis in neuroblastoma. To date, most detection methods of MYCN focus on DNA copy numbers instead of protein expression, which is the real one performing biological function, for poor antibodies. The current investigation was to explore a fast and reliable way to detect MYCN protein expression and evaluate its performance in predicting prognosis. Methods Several MYCN antibodies were used to detect MYCN protein expression by immunohistochemistry (IHC), and one was chosen for further study. We correlated the IHC results of MYCN from 53 patients with MYCN fluorescence in situ hybridization (FISH) and identified the sensitivity and specificity of IHC. The relationship between patient prognosis and MYCN protein expression was detected from this foundation. Results MYCN amplification status detected by FISH was most valuable for INSS stage 3 patients. In the cohort of 53 samples, IHC test demonstrated 80.0–85.7% concordance with FISH results. Further analyzing those cases with inconsistent results, we found that patients with MYCN amplification but low protein expression tumors always had a favorable prognosis. In contrast, if patients with MYCN non-amplified tumors were positive for MYCN protein, they had a poor prognosis. Conclusion MYCN protein level is better than MYCN amplification status in predicting the prognosis of neuroblastoma patients. Joint of FISH and IHC could confirm MYCN protein stability and achieve better prediction effect than the singular method. Supplementary Information The online version contains supplementary material available at 10.1186/s12887-022-03449-1. The MYCN gene test is most valuable for INSS stage 3 patients to predict prognosis. Compared to gene status, MYCN protein expression is more relevant to prognosis. Combining FISH with IHC, MYCN protein stability could be identified.
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Affiliation(s)
- Yi Yang
- Pediatric Translational Medicine Institute, Department of Hematology & Oncology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, National Health Committee Key Laboratory of Pediatric Hematology & Oncology, Shanghai, 200127, China
| | - Jie Zhao
- Department of Hematology & Oncology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, National Health Committee Key Laboratory of Pediatric Hematology & Oncology, Shanghai, 200127, China
| | - Yingwen Zhang
- Pediatric Translational Medicine Institute, Department of Hematology & Oncology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, National Health Committee Key Laboratory of Pediatric Hematology & Oncology, Shanghai, 200127, China
| | - Tianyue Feng
- Pediatric Translational Medicine Institute, Department of Hematology & Oncology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, National Health Committee Key Laboratory of Pediatric Hematology & Oncology, Shanghai, 200127, China.,Gezhi Senior High School of Shanghai China, Shanghai, 200001, China
| | - Bo Yv
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Jing Wang
- Department of general Surgery/Surgical Oncology Center, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, China
| | - Yijin Gao
- Department of Hematology & Oncology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, National Health Committee Key Laboratory of Pediatric Hematology & Oncology, Shanghai, 200127, China.
| | - Minzhi Yin
- Department of Pathology, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, China.
| | - Jingyan Tang
- Department of Hematology & Oncology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, National Health Committee Key Laboratory of Pediatric Hematology & Oncology, Shanghai, 200127, China.
| | - Yanxin Li
- Pediatric Translational Medicine Institute, Department of Hematology & Oncology, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, National Health Committee Key Laboratory of Pediatric Hematology & Oncology, Shanghai, 200127, China.
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4
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Yan B, Guo Y, Gui Y, Jiang ZS, Zheng XL. Multifunctional RNase MCPIP1 and its Role in Cardiovascular Diseases. Curr Med Chem 2021; 28:3385-3405. [PMID: 33191882 DOI: 10.2174/0929867327999201113100918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 09/20/2020] [Accepted: 10/09/2020] [Indexed: 11/22/2022]
Abstract
Monocyte chemoattractant protein-1 induced protein 1 (MCPIP1), one of the MCPIP family members, is characterized by the presence of both C-x8-C-x5-C-x3-H (CCCH)- type zinc finger and PilT-N-terminal domains. As a potent regulator of innate immunity, MCPIP1 exerts anti-inflammatory effects through its ribonuclease (RNase) and deubiquitinating enzyme activities to degrade cytokine mRNAs and inhibit nuclear factor- kappa B (NF-κB), respectively. MCPIP1 is expressed not only in immune cells but also in many other cell types, including cardiomyocytes, vascular endothelial cells (ECs) and smooth muscle cells (SMCs). Increasing evidence indicates that MCPIP1 plays a role in the regulation of cardiac functions and is involved in the processes of vascular diseases, such as ischemia-reperfusion (I/R) and atherosclerosis. To better understand the emerging roles of MCPIP1 in the cardiovascular system, we reviewed the current literature with respect to MCPIP1 functions and discussed its association with the pathogenesis of cardiovascular diseases and the implication as a therapeutic target.
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Affiliation(s)
- Binjie Yan
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerosis of Hunan Province, Hengyang Medical College, University of South China, Hengyang City, Hunan Province 421001, China
| | - Yanan Guo
- Departments of Biochemistry & Molecular Biology and Physiology & Pharmacology, Libin Cardiovascular Institute, Cumming School of Medicine, The University of Calgary, 3330 Hospital Drive N.W., Calgary, ABT2N 4N1, Canada
| | - Yu Gui
- Departments of Biochemistry & Molecular Biology and Physiology & Pharmacology, Libin Cardiovascular Institute, Cumming School of Medicine, The University of Calgary, 3330 Hospital Drive N.W., Calgary, ABT2N 4N1, Canada
| | - Zhi-Sheng Jiang
- Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerosis of Hunan Province, Hengyang Medical College, University of South China, Hengyang City, Hunan Province 421001, China
| | - Xi-Long Zheng
- Departments of Biochemistry & Molecular Biology and Physiology & Pharmacology, Libin Cardiovascular Institute, Cumming School of Medicine, The University of Calgary, 3330 Hospital Drive N.W., Calgary, ABT2N 4N1, Canada
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5
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Li H, Zhao C, Zhao H, Liu G, Mao H, Liu Y. Elevated linc00936 or silenced microRNA-425-3p inhibits immune escape of gastric cancer cells via elevation of ZC3H12A. Int Immunopharmacol 2021; 95:107559. [PMID: 33756228 DOI: 10.1016/j.intimp.2021.107559] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 02/25/2021] [Accepted: 03/01/2021] [Indexed: 02/07/2023]
Abstract
OBJECTIVE Gastric cancer (GC) is a malignant tumor originated from gastric mucosa. Without effective therapy, this study was to investigate the mechanism of long intergenic noncoding RNA 00936 (linc00936)/microRNA-425-3p (miR-425-3p)/monocyte chemotactic protein-induced protein 1 (ZC3H12A) axis mediating immune escape of GC cells. METHODS Peripheral blood samples, GC tissues and adjacent tissues were collected. The levels of CD3+, CD4+, and CD8+ in peripheral blood were detected. The expression levels of linc00936, miR-425-3p and ZC3H12A in GC tissues and cells were detected. The correlation between the expression of linc00936 in the tissues and the levels of CD3+, CD4+ and CD8+ in the peripheral blood of GC patients was analyzed. Cytokine-induced killer (CIK) cells were induced, and co-incubated with GC cells. BGC-823 and MKN-45 cells were screened and transfected with linc00936- or miR-425-3p-related oligonucleotides to figure out their roles in immune escape, migration, apoptosis and the cytotoxicity of CIK cells in GC cells. RESULTS Elevated miR-425-3p and reduced linc00936, and ZC3H12A expression levels were found in GC tissues and cells. Linc00936 expression was positively correlated with CD3+ and CD4+, and negatively correlated with CD8+ in peripheral blood of patients with GC. Up-regulating linc00936 or down-regulating miR-425-3p inhibited immune escape, migration, promoted apoptosis of GC cells, as well induced CIK cell cytotoxicity to GC cells. Down-regulated linc00936 or elevated miR-425-3p facilitated immune escape, migration, depressed apoptosis of GC cells, and reduced the cytotoxicity of CIK cells to GC cells. CONCLUSION The study concludes that up-regulated linc00936 or silenced miR-425-3p inhibits immune escape of GC cells via elevation of ZC3H12A.
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Affiliation(s)
- Haohao Li
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Chunlin Zhao
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Hongchao Zhao
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Guanghui Liu
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Haoxun Mao
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China
| | - Yanfen Liu
- Department of Oncology, Biological Therapy Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, Henan, China.
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Nowak I, Brożyna AA, Zabłocka M, Student S, Durbas M, Bugara B, Rokita H. MCPIP1 expression positively correlates with melanoma-specific survival of patients, and its overexpression affects vital intracellular pathways of human melanoma cells. Mol Carcinog 2021; 60:227-241. [PMID: 33544962 DOI: 10.1002/mc.23286] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 01/18/2021] [Accepted: 01/19/2021] [Indexed: 01/14/2023]
Abstract
The suppressive activity of monocyte chemoattractant protein 1-induced protein 1 (MCPIP1) an inflammation-related ribonuclease, has been described in a few cancer types but has yet to be assessed in the most common subtype of skin cancer: melanoma. Here, we have evaluated the MCPIP1 expression in melanoma tissues by reanalysis of publicly available transcriptome data from 89 melanoma samples, and immunohistochemical staining of 21 primary and 81 metastatic melanomas. Our data implicated decreased MCPIP1 expression in melanoma tumors compared to normal tissues, and positive correlation between high ribonuclease expression and melanoma-specific survival of patients. To investigate the ribonuclease activity in melanoma cells, MCPIP1 was ectopically expressed in the MV3 human melanoma cell line. Following the transcriptome, proteome, and intracellular signaling of MCPIP1-overexpressing MV3 cells was assessed via real-time quantitative polymerase chain reaction, Western blot analysis, and RNAseq. MV3 cells overexpressing MCPIP1 exhibited a broad range of alterations in the transcriptome and proteome, as well as in the phosphorylation status of a number of proteins, strongly indicating MCPIP1-dependent cell cycle arrest and inhibition of Akt/mTOR signaling in these cells. Moreover, we have shown, that MCPIP1 overexpression downregulates miRNA-193a-3p expression in MV3 cells. Furthermore, the majority of the described effects were dependent on the ribonucleolytic activity of the protein. The presented body of data strongly suggests a potential tumor suppressor role and possible future application as a positive prognostic marker of MCPIP1 protein in melanoma.
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Affiliation(s)
- Iwona Nowak
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Anna A Brożyna
- Department of Human Biology, Institute of Biology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University, Toruń, Poland.,Department of Tumour Pathology and Pathomorphology, Oncology Centre-Prof. Franciszek Łukaszczyk Memorial Hospital, Bydgoszcz, Poland
| | - Marzena Zabłocka
- Department of Tumour Pathology and Pathomorphology, Oncology Centre-Prof. Franciszek Łukaszczyk Memorial Hospital, Bydgoszcz, Poland
| | - Sebastian Student
- Biotechnology Centre, Silesian University of Technology, Gliwice, Poland.,Department of System Biology and Engineering, Faculty of Automatic Control, Electronics and Computer Science, Silesian University of Technology, Gliwice, Poland
| | - Małgorzata Durbas
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Beata Bugara
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Hanna Rokita
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
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7
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Nowak I, Boratyn E, Student S, Bernhart SF, Fallmann J, Durbas M, Stadler PF, Rokita H. MCPIP1 ribonuclease can bind and cleave AURKA mRNA in MYCN-amplified neuroblastoma cells. RNA Biol 2021; 18:144-156. [PMID: 32757706 PMCID: PMC7834091 DOI: 10.1080/15476286.2020.1804698] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/18/2020] [Accepted: 07/28/2020] [Indexed: 02/08/2023] Open
Abstract
The role of the inflammation-silencing ribonuclease, MCPIP1 (monocyte chemoattractant protein-induced protein 1), in neoplasia continuous to emerge. The ribonuclease can cleave not only inflammation-related transcripts but also some microRNAs (miRNAs) and viral RNAs. The suppressive effect of the protein has been hitherto suggested in breast cancer, clear cell renal cell carcinoma, osteosarcoma, and neuroblastoma. Our previous results have demonstrated a reduced levels of several oncogenes, as well as inhibited growth of neuroblastoma cells upon MCPIP1 overexpression. Here, we investigate the mechanisms underlying the suppression of MYCN proto-oncogene, bHLH transcription factor (MYCN)-amplified neuroblastoma cells overexpressing the MCPIP1 protein. We showed that the levels of several transcripts involved in cell cycle progression decreased in BE(2)-C and KELLY cells overexpressing MCPIP1 in a ribonucleolytic activity-dependent manner. However, RNA immunoprecipitation indicated that only AURKA mRNA (encoding for Aurora A kinase) interacts with the ribonuclease. Furthermore, the application of a luciferase assay suggested MCPIP1-dependent destabilization of the transcript. Further analyses demonstrated that the entire conserved region of AURKA seems to be indispensable for the interaction with the MCPIP1 protein. Additionally, we examined the effect of the ribonuclease overexpression on the miRNA expression profile in MYCN-amplified neuroblastoma cells. However, no significant alterations were observed. Our data indicate a key role of the binding and cleavage of the AURKA transcript in an MCPIP1-dependent suppressive effect on neuroblastoma cells.
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Affiliation(s)
- Iwona Nowak
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Elżbieta Boratyn
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Sebastian Student
- Biotechnology Centre, Silesian University of Technology, Gliwice, Poland
| | - Stephan F. Bernhart
- Bioinformatics Group, Department of Computer Science & Interdisciplinary Center for Bioinformatics, Leipzig University, Leipzig, Germany
| | - Jörg Fallmann
- Bioinformatics Group, Department of Computer Science & Interdisciplinary Center for Bioinformatics, Leipzig University, Leipzig, Germany
| | - Małgorzata Durbas
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
| | - Peter F. Stadler
- Bioinformatics Group, Department of Computer Science & Interdisciplinary Center for Bioinformatics, Leipzig University, Leipzig, Germany
| | - Hanna Rokita
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Kraków, Poland
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8
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Up-regulated MCPIP1 in abdominal aortic aneurysm is associated with vascular smooth muscle cell apoptosis and MMPs production. Biosci Rep 2020; 39:220754. [PMID: 31651935 PMCID: PMC6851509 DOI: 10.1042/bsr20191252] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 09/24/2019] [Accepted: 10/08/2019] [Indexed: 12/27/2022] Open
Abstract
Abdominal aortic aneurysm (AAA) is often clinically silent before rupture characterized by extensive vascular inflammation and degenerative elasticity of aortic wall. Monocyte chemotactic protein-induced protein-1 (MCPIP1) exhibits anti-infllammatory and pro-apoptotic effects involved in atherogenesis. However, little is known about the expression and the contribution of MCPIP1 in AAA. In the present study, we collected clinical AAA specimens and constructed AAA mice model through Ang-II infusion, and found apparently increased MCPIP1 expression and severe inflammatory infiltration in AAA aortic membrane as evidenced by elevated levels of monocyte chemotactic protein 1 (MCP-1), interleukin 1 β (IL-1β) and NF-κB, as well as HE staining. The elasticity of aortic tunica media was impaired along with multiple apoptosis of vascular smooth muscle cells (VSMCs) in Ang-II-induced aneurysmal mouse. In vitro Ang-II administration of VSMCs induced MCPIP1 expression, accompanied by up-regulation of matrix metalloproteinase (MMP) 2 (MMP-2) and MMP-9, as well as enhancement of VSMCs proliferation and apoptosis, which may cause damage of intima–media elasticity. Silencing MCPIP1 reversed above effects to further restore the balance of proliferation and apoptosis in VSMCs. Overall, our data indicated that up-regulation of MCPIP1 may become a promising candidate for the diagnosis of AAA, and specific knockdown of MCPIP1 in VSMCs could inhibit VSMCs apoptosis and down-regulate MMPs to maintain vascular wall elasticity. Therefore, knockdown of MCPIP1 may serve as a potential target for gene therapy of AAA.
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The anti-inflammatory protein MCPIP1 inhibits the development of ccRCC by maintaining high levels of tumour suppressors. Eur J Pharmacol 2020; 888:173591. [PMID: 32971087 DOI: 10.1016/j.ejphar.2020.173591] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 09/15/2020] [Accepted: 09/18/2020] [Indexed: 12/26/2022]
Abstract
Clear cell renal cell carcinoma (ccRCC) is the most common subtype of kidney cancer. It is highly vascularized and largely resistant to traditional chemo- and radiotherapy. Decreases in tumour suppressors and low levels of the anti-inflammatory Monocyte Chemoattractant Protein-Induced Protein 1 (MCPIP1) play important roles in the development and progression of ccRCC. MCPIP1, also called Regnase-1, possesses endonuclease activity and degrades the mRNA of proinflammatory cytokines such as IL-6, IL-1β, IL-12 and IL-2. We previously showed that the level of MCPIP1 decreases with ccRCC progression. In this study, we explored the role of MCPIP1 in regulating the levels of tumour suppressors. We found low levels of the suppressors PTEN, RECK and TIMP3 and high levels of MMPs in patients with ccRCC who had already been shown to have low MCPIP1 expression. We demonstrated that MCPIP1 regulates the expression levels of PTEN, RECK and TIMP3 in ccRCC cell lines as well as in vivo models of ccRCC. MCPIP1 overexpression increased the expression of tumour suppressors. Moreover, we observed that the RNase activity of MCPIP1 is responsible for the modulation of apoptosis and activation of prometastatic signalling pathways. Furthermore, we found a negative correlation between high levels of IL6, a direct target of MCPIP1 RNase activity, and TIMP3 in patients, indicating that MCPIP1 and TIMP3 might collectively cause the high levels of IL6 in ccRCC patients. Taken together, our results show the importance of MCPIP1 in regulating the level of tumour suppressors and, consequently, in ccRCC development and progression.
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Boratyn E, Nowak I, Karnas E, Ryszawy D, Wnuk D, Polus A, Durbas M, Horwacik I, Rokita H. MCPIP1 overexpression in human neuroblastoma cell lines causes cell‐cycle arrest by G1/S checkpoint block. J Cell Biochem 2020; 121:3406-3425. [DOI: 10.1002/jcb.29614] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 12/11/2019] [Indexed: 12/23/2022]
Affiliation(s)
- Elżbieta Boratyn
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics, and BiotechnologyJagiellonian University Kraków Poland
| | - Iwona Nowak
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics, and BiotechnologyJagiellonian University Kraków Poland
| | - Elżbieta Karnas
- Laboratory of Stem Cell Biotechnology, Malopolska Centre of BiotechnologyJagiellonian University Kraków Poland
- Department of Cell Biology, Faculty of Biochemistry, Biophysics, and BiotechnologyJagiellonian University Kraków Poland
| | - Damian Ryszawy
- Department of Cell Biology, Faculty of Biochemistry, Biophysics, and BiotechnologyJagiellonian University Kraków Poland
| | - Dawid Wnuk
- Department of Cell Biology, Faculty of Biochemistry, Biophysics, and BiotechnologyJagiellonian University Kraków Poland
| | - Anna Polus
- Department of Clinical Biochemistry, Medical CollegeJagiellonian University Kraków Poland
| | - Małgorzata Durbas
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics, and BiotechnologyJagiellonian University Kraków Poland
| | - Irena Horwacik
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics, and BiotechnologyJagiellonian University Kraków Poland
| | - Hanna Rokita
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics, and BiotechnologyJagiellonian University Kraków Poland
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11
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von Gamm M, Schaub A, Jones AN, Wolf C, Behrens G, Lichti J, Essig K, Macht A, Pircher J, Ehrlich A, Davari K, Chauhan D, Busch B, Wurst W, Feederle R, Feuchtinger A, Tschöp MH, Friedel CC, Hauck SM, Sattler M, Geerlof A, Hornung V, Heissmeyer V, Schulz C, Heikenwalder M, Glasmacher E. Immune homeostasis and regulation of the interferon pathway require myeloid-derived Regnase-3. J Exp Med 2019; 216:1700-1723. [PMID: 31126966 PMCID: PMC6605757 DOI: 10.1084/jem.20181762] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2018] [Revised: 02/15/2019] [Accepted: 04/12/2019] [Indexed: 12/20/2022] Open
Abstract
The RNase Regnase-1 is a master RNA regulator in macrophages and T cells that degrades cellular and viral RNA upon NF-κB signaling. The roles of its family members, however, remain largely unknown. Here, we analyzed Regnase-3-deficient mice, which develop hypertrophic lymph nodes. We used various mice with immune cell-specific deletions of Regnase-3 to demonstrate that Regnase-3 acts specifically within myeloid cells. Regnase-3 deficiency systemically increased IFN signaling, which increased the proportion of immature B and innate immune cells, and suppressed follicle and germinal center formation. Expression analysis revealed that Regnase-3 and Regnase-1 share protein degradation pathways. Unlike Regnase-1, Regnase-3 expression is high specifically in macrophages and is transcriptionally controlled by IFN signaling. Although direct targets in macrophages remain unknown, Regnase-3 can bind, degrade, and regulate mRNAs, such as Zc3h12a (Regnase-1), in vitro. These data indicate that Regnase-3, like Regnase-1, is an RNase essential for immune homeostasis but has diverged as key regulator in the IFN pathway in macrophages.
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Affiliation(s)
- Matthias von Gamm
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center at Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Annalisa Schaub
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center at Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany.,Institute of Molecular Toxicology and Pharmacology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Alisha N Jones
- Institute of Structural Biology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany.,Center for Integrated Protein Science Munich, Chemistry Department, Technical University of Munich, Garching, Germany
| | - Christine Wolf
- Institute of Environmental Medicine, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Gesine Behrens
- Institute for Immunology, Biomedical Center, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany
| | - Johannes Lichti
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center at Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Katharina Essig
- Roche Pharma Research and Early Development, Large Molecule Research, Roche Innovation Center Munich, Penzberg, Germany
| | - Anna Macht
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center at Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Joachim Pircher
- Medizinische Klinik und Poliklinik I, Klinikum der Universität München, Ludwig-Maximilians-University, Munich, Germany
| | - Andreas Ehrlich
- Medizinische Klinik und Poliklinik I, Klinikum der Universität München, Ludwig-Maximilians-University, Munich, Germany
| | | | - Dhruv Chauhan
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Benjamin Busch
- Max von Pettenkofer-Institut für Hygiene und Medizinische Mikrobiologie, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Wolfgang Wurst
- Institute of Developmental Genetics, Helmholtz Zentrum München, Munich, Germany.,Technische Universität München-Weihenstephan, Neuherberg-Munich, Germany.,German Center for Neurodegenerative Diseases, Munich, Germany.,Munich Cluster for Systems Neurology, Munich, Germany
| | - Regina Feederle
- Monoclonal Antibody Core Facility, Institute for Diabetes and Obesity, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Annette Feuchtinger
- Research Unit Analytical Pathology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Matthias H Tschöp
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center at Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany.,Division of Metabolic Diseases, Department of Medicine, Technische Universität München, Munich, Germany
| | - Caroline C Friedel
- Institute for Informatics, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Stefanie M Hauck
- Research Unit Protein Science, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Michael Sattler
- Institute of Structural Biology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany.,Center for Integrated Protein Science Munich, Chemistry Department, Technical University of Munich, Garching, Germany
| | - Arie Geerlof
- Institute of Structural Biology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Veit Hornung
- Gene Center and Department of Biochemistry, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Vigo Heissmeyer
- Institute for Immunology, Biomedical Center, Ludwig-Maximilians-Universität München, Planegg-Martinsried, Germany.,Research Unit Molecular Immune Regulation, Helmholtz Zentrum München, German Research Center for Environmental Health, Munich, Germany
| | - Christian Schulz
- Medizinische Klinik und Poliklinik I, Klinikum der Universität München, Ludwig-Maximilians-University, Munich, Germany.,German Center for Cardiovascular Research, partner site Munich Heart Alliance, Munich, Germany
| | - Mathias Heikenwalder
- Division of Chronic Inflammation and Cancer (F180), German Cancer Research Center, Heidelberg, Germany
| | - Elke Glasmacher
- Institute for Diabetes and Obesity, Helmholtz Diabetes Center at Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany .,Roche Pharma Research and Early Development, Large Molecule Research, Roche Innovation Center Munich, Penzberg, Germany
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12
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Nowak I, Boratyn E, Durbas M, Horwacik I, Rokita H. Exogenous expression of miRNA-3613-3p causes APAF1 downregulation and affects several proteins involved in apoptosis in BE(2)-C human neuroblastoma cells. Int J Oncol 2018; 53:1787-1799. [PMID: 30066861 DOI: 10.3892/ijo.2018.4509] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 07/02/2018] [Indexed: 11/05/2022] Open
Abstract
MicroRNAs (miRNAs) are a class of small non‑coding RNAs involved in post‑transcriptional gene regulation. Furthermore, dysregulation of miRNA expression is an important factor in the pathogenesis of neuroblastoma. Our previous study identified that overexpression of monocyte chemoattractant protein‑induced protein 1 protein led to a significant downregulation of a novel miRNA molecule, miRNA‑3613‑3p. In the present study, the potential involvement of miRNA‑3613‑3p in the cell biology of neuroblastoma was investigated. It was identified that the expression of miRNA‑3613‑3p varies among a range of human neuroblastoma cell lines. As the delineation of the functions of a miRNA requires the identification of its target genes, seven putative mRNAs that may be regulated by miRNA‑3613‑3p were selected. Furthermore, it was identified that overexpression of miRNA‑3613‑3p causes significant downregulation of several genes exhibiting tumor suppressive potential [encoding apoptotic protease‑activating factor 1 (APAF1), Dicer, DNA fragmentation factor subunit β, von Hippel‑Lindau protein and neurofibromin 1] in BE(2)‑C human neuroblastoma cells. APAF1 mRNA was the most significantly decreased transcript in the cells with miRNA‑3613‑3p overexpression. In accordance with the aforementioned results, the downregulation of cleaved caspase-9 and lack of activation of executive caspases in BE(2)‑C cells following miRNA‑3613‑3p overexpression was observed. The results of the present study suggest a potential underlying molecular mechanism of apoptosis inhibition via APAF1 downregulation in human neuroblastoma BE(2)‑C cells with miRNA‑3613‑3p overexpression.
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Affiliation(s)
- Iwona Nowak
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 30-387 Kraków, Poland
| | - Elżbieta Boratyn
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 30-387 Kraków, Poland
| | - Małgorzata Durbas
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 30-387 Kraków, Poland
| | - Irena Horwacik
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 30-387 Kraków, Poland
| | - Hanna Rokita
- Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 30-387 Kraków, Poland
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13
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Yang R, Wu Y, Ming Y, Xu Y, Wang S, Shen J, Wang C, Chen X, Wang Y, Mao R, Fan Y. A super-enhancer maintains homeostatic expression of Regnase-1. Gene 2018; 669:35-41. [PMID: 29777912 DOI: 10.1016/j.gene.2018.05.052] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 04/28/2018] [Accepted: 05/15/2018] [Indexed: 01/14/2023]
Abstract
Regnase-1 is not only a key component in maintaining intracellular homeostasis but also a critical negative regulator in preventing autoimmune diseases and cancer development. To keep homeostatic state, Regnase-1 has to be maintained at a desired level in multiple cell types. However, the molecular mechanism of keeping a certain transcriptional level of Reganase-1 is largely unknown. In this study, we found a super-enhancer (Reg-1-SE) around Regnase-1 gene is able to control the homeostatic expression of Regnase-1. Functional inhibition of super-enhancers through BRD4 inhibitors or genetic silence of key components such as BRD4 and MED1 significantly downregulates Regnase-1 expression at multiple cell types. Consistently, treatment of JQ1 or I-BET-762 dramatically decreases the protein level of Regnase-1. By analyzing Regnase-1 gene, the distribution of H3K27Ac is highly enriched at a 8 kb DNA region around the second intron. Several DNA elements at the second intron are highly conserved between different species. Deletion of the second intron by CRISPR-Cas9 technology significantly reduces the expression of Regnase-1. JQ1 or I-BET-762 failed to further downregulate the expression of Regnase-1 in cells without the second intron. Our result reveals a novel molecular mechanism by which a super-enhancer around the second intron regulates the expression of Regnase-1, and in turn maintains a desired level of Regnase-1.
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Affiliation(s)
- Riyun Yang
- Basic Medical Research Center, School of Medicine, Nantong University, China
| | - Yuanyuan Wu
- Basic Medical Research Center, School of Medicine, Nantong University, China
| | - Yue Ming
- Department of Immunology, School of Medicine, Nantong University, China
| | - Yuanpei Xu
- Department of Immunology, School of Medicine, Nantong University, China
| | - Shouyan Wang
- Basic Medical Research Center, School of Medicine, Nantong University, China
| | - Jianbo Shen
- Department of Gastroenterology, Affiliated Hospital of Nantong University, China
| | - Chenlu Wang
- Department of Immunology, School of Medicine, Nantong University, China
| | - Xia Chen
- Basic Medical Research Center, School of Medicine, Nantong University, China
| | - Yongming Wang
- Collaborative Innovation Center for Genetics and Development, School of Life Sciences and Zhongshan Hospital, Fudan University, China
| | - Renfang Mao
- Department of pathophysiology, School of Medicine, Nantong University, China
| | - Yihui Fan
- Basic Medical Research Center, School of Medicine, Nantong University, China; Department of Immunology, School of Medicine, Nantong University, China.
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14
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Lichawska-Cieslar A, Pietrzycka R, Ligeza J, Kulecka M, Paziewska A, Kalita A, Dolicka DD, Wilamowski M, Miekus K, Ostrowski J, Mikula M, Jura J. RNA sequencing reveals widespread transcriptome changes in a renal carcinoma cell line. Oncotarget 2018; 9:8597-8613. [PMID: 29492220 PMCID: PMC5823589 DOI: 10.18632/oncotarget.24269] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 12/30/2017] [Indexed: 12/12/2022] Open
Abstract
We used RNA sequencing (RNA-Seq) technology to investigate changes in the transcriptome profile in the Caki-1 clear cell renal cell carcinoma (ccRCC) cells, which overexpress monocyte chemoattractant protein-induced protein 1 (MCPIP1). RNA-Seq data showed changes in 11.6% and 41.8% of the global transcriptome of Caki-1 cells overexpressing wild-type MCPIP1 or its D141N mutant, respectively. Gene ontology and KEGG pathway functional analyses showed that these transcripts encoded proteins involved in cell cycle progression, protein folding in the endoplasmic reticulum, hypoxia response and cell signalling. We identified 219 downregulated transcripts in MCPIP1-expressing cells that were either unchanged or upregulated in D141N-expressing cells. We validated downregulation of 15 transcripts belonging to different functional pathways by qRT-PCR. The growth and viability of MCPIP1-expressing cells was reduced because of elevated p21Cip1 levels. MCPIP1-expressing cells also showed reduced levels of DDB1 transcript that encodes component of the E3 ubiquitin ligase that degrades p21Cip1. These results demonstrate that MCPIP1 influences the growth and viability of ccRCC cells by increasing or decreasing the transcript levels for proteins involved in cell cycle progression, protein folding, hypoxia response, and cell signaling.
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Affiliation(s)
- Agata Lichawska-Cieslar
- Department of General Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Roza Pietrzycka
- Department of General Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Janusz Ligeza
- Department of General Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Maria Kulecka
- Departments of Gastroenterology, Hepatology and Clinical Oncology, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - Agnieszka Paziewska
- Departments of Gastroenterology, Hepatology and Clinical Oncology, Centre of Postgraduate Medical Education, Warsaw, Poland
| | - Agata Kalita
- Department of General Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Dobrochna D. Dolicka
- Department of General Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Mateusz Wilamowski
- Department of General Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Katarzyna Miekus
- Department of General Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - Jerzy Ostrowski
- Departments of Gastroenterology, Hepatology and Clinical Oncology, Centre of Postgraduate Medical Education, Warsaw, Poland
- Department of Genetics, Maria Sklodowska-Curie Memorial Cancer Centre and Institute of Oncology, Warsaw, Poland
| | - Michal Mikula
- Department of Genetics, Maria Sklodowska-Curie Memorial Cancer Centre and Institute of Oncology, Warsaw, Poland
| | - Jolanta Jura
- Department of General Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
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15
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Takeuchi O. Endonuclease Regnase-1/Monocyte chemotactic protein-1-induced protein-1 (MCPIP1) in controlling immune responses and beyond. WILEY INTERDISCIPLINARY REVIEWS-RNA 2017; 9. [PMID: 28929622 DOI: 10.1002/wrna.1449] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 08/15/2017] [Accepted: 08/17/2017] [Indexed: 12/14/2022]
Abstract
The activation of inflammatory cells is controlled at transcriptional and posttranscriptional levels. Posttranscriptional regulation modifies mRNA stability and translation, allowing for elaborate control of proteins required for inflammation, such as proinflammatory cytokines, prostaglandin synthases, cell surface co-stimulatory molecules, and even transcriptional modifiers. Such regulation is important for coordinating the initiation and resolution of inflammation, and is mediated by a set of RNA-binding proteins (RBPs), including Regnase-1, Roquin, Tristetraprolin (TTP), and AU-rich elements/poly(U)-binding/degradation factor 1 (AUF1). Among these, Regnase-1, also known as Zc3h12a and Monocyte chemotactic protein-1-induced protein-1 (MCPIP1), acts as an endoribonuclease responsible for the degradation of mRNAs involved in inflammatory responses. Conversely, the RBPs Roquin and TTP trigger exonucleolytic degradation of mRNAs by recruiting the CCR4-NOT deadenylase complex. Regnase-1 specifically recognizes stem-loop structures present in 3'-untranslated regions of cytokine mRNAs, and directly degrades the mRNAs in a translation- and ATP-dependent RNA helicase upframeshift 1 (UPF1)-dependent manner that is reminiscent of nonsense-mediated decay. Regnase-1 regulates the activation of innate and acquired immune cells, and is critical for maintaining immune homeostasis as well as preventing over-activation of the immune system under inflammatory conditions. Furthermore, recent studies have revealed that Regnase-1 and its family members are involved not only in immunity but also in various biological processes. In this article, I review molecular mechanisms of Regnase-1-mediated mRNA decay and its physiological roles. WIREs RNA 2018, 9:e1449. doi: 10.1002/wrna.1449 This article is categorized under: RNA Interactions with Proteins and Other Molecules > Protein-RNA Interactions: Functional Implications RNA Turnover and Surveillance > Regulation of RNA Stability RNA in Disease and Development > RNA in Disease.
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Affiliation(s)
- Osamu Takeuchi
- Laboratory of Infection and Prevention, Institute for Frontier Life and Medical Sciences, Kyoto University, AMED-CREST, AMED, Kyoto, Japan
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16
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MCPIP1 contributes to clear cell renal cell carcinomas development. Angiogenesis 2017; 20:325-340. [PMID: 28197812 PMCID: PMC5511613 DOI: 10.1007/s10456-017-9540-2] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 01/31/2017] [Indexed: 12/22/2022]
Abstract
Monocyte Chemoattractant protein-induced protein 1 (MCPIP1), also known as Regnase-1, is encoded by the ZC3H12a gene, and it mediates inflammatory processes by regulating the stability of transcripts coding for proinflammatory cytokines and controlling activity of transcription factors, such as NF-κB and AP1. We found that MCPIP1 transcript and protein levels are strongly downregulated in clear cell renal cell carcinoma (ccRCC) samples, which were derived from patients surgically treated for renal cancer compared to surrounded normal tissues. Using Caki-1 cells as a model, we analyzed the role of MCPIP1 in cancer development. We showed that MCPIP1 expression depends on the proteasome activity; however, hypoxia and hypoxia inducible factor 2 alfa (HIF2α) are key factors lowering MCPIP1 expression. Furthermore, we found that MCPIP1 negatively regulates HIF1α and HIF2α levels and in the case of the last one, the mechanism is based on the regulation of the half time of transcript coding for HIF2α. Enhanced expression of MCPIP1 in Caki-1 cells results in a downregulation of transcripts encoding VEGFA, GLUT1, and IL-6. Furthermore, MCPIP1 decreases the activity of mTOR and protein kinase B (Akt) in normoxic conditions. Taken together, MCPIP1 contributes to the ccRCC development.
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