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Cheng L, Liu D, Gao S. PPARA ameliorates sepsis-induced myocardial injury via promoting macrophage M2 polarization by interacting with DUSP1. Regen Ther 2024; 26:33-41. [PMID: 38798745 PMCID: PMC11126881 DOI: 10.1016/j.reth.2024.04.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 03/29/2024] [Accepted: 04/25/2024] [Indexed: 05/29/2024] Open
Abstract
Background The morbidity and mortality of sepsis are increasing year by year. Statistically, 40-50% of patients with sepsis have concomitant myocardial injury, and its mortality rate is higher than that of patients with sepsis only. Therefore, it is of great significance to elucidate the mechanism of sepsis-induced myocardial injury. Methods and results Human monocytes (THP-1) were used to induce M0 macrophages, followed by treated with lipopolysaccharide (LPS). Cardiomyocytes (AC16) were co-cultured with the conditioned medium of LPS-induced macrophages to induce injury. Quantitative real-time PCR was employed to detect the mRNA levels of peroxisome proliferator-activated receptor α (PPARA) and dual specificity phosphatase 1 (DUSP1). Protein levels of PPARA, macrophage polarization-related markers, apoptosis-related markers, mitochondria-related proteins, and DUSP1 were analyzed by Western blot. Flow cytometry was used to assess M1/M2 cell rates and apoptosis. Low PPARA expression could serve as a biomarker for patients with sepsis. PPARA overexpression enhanced M2 polarization and suppressed M1 polarization in LPS-induced macrophages, and it could alleviate cardiomyocyte injury in co-cultured system. PPARA bound to the DUSP1 promoter region and facilitated its expression. DUSP1 knockdown reversed the effect of PPARA overexpression on M2 polarization and cardiomyocyte injury. Conclusion PPARA attenuated cardiomyocyte injury by promoting macrophage M2 polarization through increasing DUSP1 expression, suggesting that PPARA might be a therapy target for sepsis-induced myocardial injury.
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Affiliation(s)
- Li Cheng
- General Intensive Care Unit (GICU), Xinxiang Central Hospital, Xinxiang City, 453000, China
| | - Dezhi Liu
- Respiratory Intensive Care Unit (RICU), Xinxiang Central Hospital, Xinxiang City, 453000, China
| | - Shanglan Gao
- General Intensive Care Unit (GICU), Xinxiang Central Hospital, Xinxiang City, 453000, China
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2
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Hou YM, Xu BH, Zhang QT, Cheng J, Zhang X, Yang HR, Wang ZY, Wang P, Zhang MX. Deficiency of smooth muscle cell ILF3 alleviates intimal hyperplasia via HMGB1 mRNA degradation-mediated regulation of the STAT3/DUSP16 axis. J Mol Cell Cardiol 2024; 190:62-75. [PMID: 38583797 DOI: 10.1016/j.yjmcc.2024.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 04/03/2024] [Accepted: 04/04/2024] [Indexed: 04/09/2024]
Abstract
Intimal hyperplasia is a complicated pathophysiological phenomenon attributable to in-stent restenosis, and the underlying mechanism remains unclear. Interleukin enhancer-binding factor 3 (ILF3), a double-stranded RNA-binding protein involved in regulating mRNA stability, has been recently demonstrated to assume a crucial role in cardiovascular disease; nevertheless, its impact on intimal hyperplasia remains unknown. In current study, we used samples of human restenotic arteries and rodent models of intimal hyperplasia, we found that vascular smooth muscle cell (VSMC) ILF3 expression was markedly elevated in human restenotic arteries and murine ligated carotid arteries. SMC-specific ILF3 knockout mice significantly suppressed injury induced neointimal formation. In vitro, platelet-derived growth factor type BB (PDGF-BB) treatment elevated the level of VSMC ILF3 in a dose- and time-dependent manner. ILF3 silencing markedly inhibited PDGF-BB-induced phenotype switching, proliferation, and migration in VSMCs. Transcriptome sequencing and RNA immunoprecipitation sequencing depicted that ILF3 maintained its stability upon binding to the mRNA of the high-mobility group box 1 protein (HMGB1), thereby exerting an inhibitory effect on the transcription of dual specificity phosphatase 16 (DUSP16) through enhanced phosphorylation of signal transducer and activator of transcription 3 (STAT3). Therefore, the results both in vitro and in vivo indicated that the loss of ILF3 in VSMC ameliorated neointimal hyperplasia by regulating the STAT3/DUSP16 axis through the degradation of HMGB1 mRNA. Our findings revealed that vascular injury activates VSMC ILF3, which in turn promotes intima formation. Consequently, targeting specific VSMC ILF3 may present a potential therapeutic strategy for ameliorating cardiovascular restenosis.
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Affiliation(s)
- Ya-Min Hou
- National Key Laboratory for Innovation and Transformation of Luobing Theory, The Key Laboratory of Cardiovascular Remodelling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | - Bo-Han Xu
- National Key Laboratory for Innovation and Transformation of Luobing Theory, The Key Laboratory of Cardiovascular Remodelling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | - Qiu-Ting Zhang
- National Key Laboratory for Innovation and Transformation of Luobing Theory, The Key Laboratory of Cardiovascular Remodelling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | - Jie Cheng
- National Key Laboratory for Innovation and Transformation of Luobing Theory, The Key Laboratory of Cardiovascular Remodelling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | - Xu Zhang
- National Key Laboratory for Innovation and Transformation of Luobing Theory, The Key Laboratory of Cardiovascular Remodelling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | - Hong-Rui Yang
- National Key Laboratory for Innovation and Transformation of Luobing Theory, The Key Laboratory of Cardiovascular Remodelling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | - Ze-Ying Wang
- National Key Laboratory for Innovation and Transformation of Luobing Theory, The Key Laboratory of Cardiovascular Remodelling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | - Peng Wang
- National Key Laboratory for Innovation and Transformation of Luobing Theory, The Key Laboratory of Cardiovascular Remodelling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China
| | - Ming-Xiang Zhang
- National Key Laboratory for Innovation and Transformation of Luobing Theory, The Key Laboratory of Cardiovascular Remodelling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences; Department of Cardiology, Qilu Hospital of Shandong University, Jinan, China.
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Giannakoulas A, Nikolaidis M, Amoutzias GD, Giannakoulas N. A comparative analysis of transcriptomics of newly diagnosed multiple myeloma: exploring drug repurposing. Front Oncol 2024; 14:1390105. [PMID: 38690165 PMCID: PMC11058662 DOI: 10.3389/fonc.2024.1390105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Accepted: 04/01/2024] [Indexed: 05/02/2024] Open
Abstract
Multiple myeloma (MM) is an incurable malignant plasma cell disorder characterized by the infiltration of clonal plasma cells in the bone marrow compartment. Gene Expression Profiling (GEP) has emerged as a powerful investigation tool in modern myeloma research enabling the dissection of the molecular background of MM and allowing the identification of gene products that could potentially serve as targets for therapeutic intervention. In this study we investigated shared transcriptomic abnormalities across newly diagnosed multiple myeloma (NDMM) patient cohorts. In total, publicly available transcriptomic data of 7 studies from CD138+ cells from 281 NDMM patients and 44 healthy individuals were integrated and analyzed. Overall, we identified 28 genes that were consistently differentially expressed (DE) between NDMM patients and healthy donors (HD) across various studies. Of those, 9 genes were over/under-expressed in more than 75% of NDMM patients. In addition, we identified 4 genes (MT1F, PURPL, LINC01239 and LINC01480) that were not previously considered to participate in MM pathogenesis. Meanwhile, by mining three drug databases (ChEMBL, IUPHAR/BPS and DrugBank) we identified 31 FDA-approved and 144 experimental drugs that target 8 of these 28 over/under-expressed MM genes. Taken together, our study offers new insights in MM pathogenesis and importantly, it reveals potential new treatment options that need to be further investigated in future studies.
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Affiliation(s)
- Angelos Giannakoulas
- Department of Hematology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Marios Nikolaidis
- Bioinformatics Laboratory, Department of Biochemistry & Biotechnology, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Grigorios D. Amoutzias
- Bioinformatics Laboratory, Department of Biochemistry & Biotechnology, School of Health Sciences, University of Thessaly, Larissa, Greece
| | - Nikolaos Giannakoulas
- Department of Hematology, Faculty of Medicine, School of Health Sciences, University of Thessaly, Larissa, Greece
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4
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Sarmasti Emami S, Ge A, Zhang D, Hao Y, Ling M, Rubino R, Nicol CJB, Wang W, Yang X. Identification of PTPN12 Phosphatase as a Novel Negative Regulator of Hippo Pathway Effectors YAP/TAZ in Breast Cancer. Int J Mol Sci 2024; 25:4064. [PMID: 38612874 PMCID: PMC11012486 DOI: 10.3390/ijms25074064] [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: 12/28/2023] [Revised: 04/04/2024] [Accepted: 04/04/2024] [Indexed: 04/14/2024] Open
Abstract
The Hippo pathway plays crucial roles in governing various biological processes during tumorigenesis and metastasis. Within this pathway, upstream signaling stimuli activate a core kinase cascade, involving MST1/2 and LATS1/2, that subsequently phosphorylates and inhibits the transcriptional co-activators YAP and its paralog TAZ. This inhibition modulates the transcriptional regulation of downstream target genes, impacting cell proliferation, migration, and death. Despite the acknowledged significance of protein kinases in the Hippo pathway, the regulatory influence of protein phosphatases remains largely unexplored. In this study, we conducted the first gain-of-functional screen for protein tyrosine phosphatases (PTPs) regulating the Hippo pathway. Utilizing a LATS kinase biosensor (LATS-BS), a YAP/TAZ activity reporter (STBS-Luc), and a comprehensive PTP library, we identified numerous novel PTPs that play regulatory roles in the Hippo pathway. Subsequent experiments validated PTPN12, a master regulator of oncogenic receptor tyrosine kinases (RTKs), as a previously unrecognized negative regulator of the Hippo pathway effectors, oncogenic YAP/TAZ, influencing breast cancer cell proliferation and migration. In summary, our findings offer valuable insights into the roles of PTPs in the Hippo signaling pathway, significantly contributing to our understanding of breast cancer biology and potential therapeutic strategies.
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Affiliation(s)
- Sahar Sarmasti Emami
- Department of Pathology and Molecular Medicine, Queen’s University, Kingston, ON K7L 3N6, Canada; (S.S.E.); (A.G.); (D.Z.); (Y.H.); (M.L.); (R.R.); (C.J.B.N.)
| | - Anni Ge
- Department of Pathology and Molecular Medicine, Queen’s University, Kingston, ON K7L 3N6, Canada; (S.S.E.); (A.G.); (D.Z.); (Y.H.); (M.L.); (R.R.); (C.J.B.N.)
| | - Derek Zhang
- Department of Pathology and Molecular Medicine, Queen’s University, Kingston, ON K7L 3N6, Canada; (S.S.E.); (A.G.); (D.Z.); (Y.H.); (M.L.); (R.R.); (C.J.B.N.)
| | - Yawei Hao
- Department of Pathology and Molecular Medicine, Queen’s University, Kingston, ON K7L 3N6, Canada; (S.S.E.); (A.G.); (D.Z.); (Y.H.); (M.L.); (R.R.); (C.J.B.N.)
| | - Min Ling
- Department of Pathology and Molecular Medicine, Queen’s University, Kingston, ON K7L 3N6, Canada; (S.S.E.); (A.G.); (D.Z.); (Y.H.); (M.L.); (R.R.); (C.J.B.N.)
| | - Rachel Rubino
- Department of Pathology and Molecular Medicine, Queen’s University, Kingston, ON K7L 3N6, Canada; (S.S.E.); (A.G.); (D.Z.); (Y.H.); (M.L.); (R.R.); (C.J.B.N.)
| | - Christopher J. B. Nicol
- Department of Pathology and Molecular Medicine, Queen’s University, Kingston, ON K7L 3N6, Canada; (S.S.E.); (A.G.); (D.Z.); (Y.H.); (M.L.); (R.R.); (C.J.B.N.)
| | - Wenqi Wang
- Department of Developmental and Cell Biology, University of California at Irvine, Irvine, CA 92617, USA;
| | - Xiaolong Yang
- Department of Pathology and Molecular Medicine, Queen’s University, Kingston, ON K7L 3N6, Canada; (S.S.E.); (A.G.); (D.Z.); (Y.H.); (M.L.); (R.R.); (C.J.B.N.)
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5
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Chen P, Wang J, Yao Y, Qu Y, Ji M, Hou P. Targeting DUSP5 suppresses malignant phenotypes of BRAF-mutant thyroid cancer cells and improves their response to sorafenib. Endocrine 2024:10.1007/s12020-024-03801-8. [PMID: 38564084 DOI: 10.1007/s12020-024-03801-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 03/24/2024] [Indexed: 04/04/2024]
Abstract
PURPOSE The role of dual-specificity phosphatase-5 (DUSP5) in BRAF-mutant thyroid cancers remains unclear. The aims of this study are to investigate the role of DUSP5 in BRAF-mutant thyroid cancer cells, explore its value in the diagnosis and evaluate therapeutic potential of targeting DUSP5 combined with sorafenib for BRAF-mutant thyroid cancer patients. METHODS The role of DUSP5 in thyroid cancer cells was determined by a series of in vitro and in vivo experiments. Underlying mechanisms were explored by western blotting analysis. The diagnostic value of combination detection of DUSP5 expression and BRAFV600E mutation was evaluated using ROC curve. RESULTS Knocking down DUSP5 in BRAF-mutant thyroid cancer cells significantly inhibited colony formation, cell migration and invasion, meanwhile, induced cell cycle arrest and cell apoptosis. Moreover, inhibition of DUSP5 improved the anti-tumor efficacy of sorafenib both in vitro and in vivo. Besides, combination detection of DUSP5 expression and BRAFV600E mutation showed much more accuracy in preoperative diagnosis of thyroid cancer. CONCLUSIONS Our data demonstrate an oncogenic role of DUSP5 in BRAF-mutant thyroid cancer cells, and combined analysis of its expression and BRAFV600E mutation can accurately diagnose thyroid cancer. In addition, inhibition of DUSP5 improves the response of BRAF-mutant thyroid cancer cells to sorafenib.
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Affiliation(s)
- Pu Chen
- Department of Endocrinology and Key Laboratory for Tumor Precision Medicine of Shaanxi Province, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, PR China
| | - Jianling Wang
- Department of Endocrinology and Key Laboratory for Tumor Precision Medicine of Shaanxi Province, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, PR China
| | - Yao Yao
- Department of Endocrinology and Key Laboratory for Tumor Precision Medicine of Shaanxi Province, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, PR China
| | - Yiping Qu
- Department of Endocrinology and Key Laboratory for Tumor Precision Medicine of Shaanxi Province, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, PR China
- Department of Radiation Oncology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, PR China
| | - Meiju Ji
- Center for Translational Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, PR China
| | - Peng Hou
- Department of Endocrinology and Key Laboratory for Tumor Precision Medicine of Shaanxi Province, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, PR China.
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6
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Liu X, Ye Z, Rao D, Chen Q, Zhang Z. DUSP4 maintains the survival and LSD1 protein stability in esophageal squamous cell carcinoma cells by inhibiting JNK signaling-dependent autophagy. In Vitro Cell Dev Biol Anim 2024; 60:115-122. [PMID: 38286920 DOI: 10.1007/s11626-023-00845-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 12/13/2023] [Indexed: 01/31/2024]
Abstract
DUSP4 is a biomarker of esophageal squamous cell carcinoma (ESCC), which is responsible for the prognosis in ESCC. However, the underlying mechanism of DUSP4-regulated ESCC carcinogenesis is unknown. As a negative regulator of JNK, DUSP4 can inhibit autophagy, which contributes to tumorigenesis. This study aimed to explore the role of autophagy in DUSP4-regulated ESCC carcinogenesis. Our results showed that DUSP4 overexpression inhibited autophagy and promoted LSD1 protein expression in ESCC cells, while DUSP4 silencing showed the opposite effects. However, DUSP4 overexpression and silencing did not affect LSD1 mRNA expression. But the regulatory ability of DUSP4 overexpression on autophagy, death level, and LSD1 protein was reversed by rapamycin. In addition, DUSP4 overexpression inhibited JNK and Bcl2 phosphorylation and the dissociation of Bcl2-Beclin1 complex, while DUSP4 silencing promoted JNK and Bcl2 phosphorylation. Moreover, the regulatory ability of DUSP4 overexpression on autophagy, death, and LSD1 protein was reversed by JNK activator anisomycin. The xenograft assays also showed that DUSP4 overexpression-promoted ESCC tumor growth in vivo and LC3II and LSD1 protein expression in tumor tissues were reversed by rapamycin or anisomycin. Overall, DUSP4 inhibits Bcl2-Beclin1-autophagy signal transduction through the negative regulation of JNK, thus suppressing autophagic death and the autophagic degradation of LSD1 in ESCC, by which DUSP4 promotes ESCC carcinogenesis.
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Affiliation(s)
- Xinxin Liu
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Gannan Medical University, Ganzhou, 341000, Jiangxi, China
- Gannan Branch of National Clinical Research Center for Geriatrics Ganzhou 341000, Jiangxi, China
| | - Zhou Ye
- Department of Digestive, The 900Th Hospital of Joint Logistic Support Force, PLA, Fuzhou, 350001, Fujian, China
| | - Dingyu Rao
- Department of Thoracic Surgery, First Affiliated Hospital of Gannan Medical University, No. 3, Outangli, Xingannan Road, Zhanggong District, Ganzhou, 341000, Jiangxi, China
| | - Qianshun Chen
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, 350001, Fujian, China.
| | - Zuxiong Zhang
- Department of Thoracic Surgery, First Affiliated Hospital of Gannan Medical University, No. 3, Outangli, Xingannan Road, Zhanggong District, Ganzhou, 341000, Jiangxi, China.
- Shengli Clinical Medical College of Fujian Medical University, Fuzhou, 350001, Fujian, China.
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Kim SW, Kim CW, Kim HS. Scoparone attenuates PD-L1 expression in human breast cancer cells by MKP-3 upregulation. Anim Cells Syst (Seoul) 2024; 28:55-65. [PMID: 38348341 PMCID: PMC10860470 DOI: 10.1080/19768354.2024.2315950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Accepted: 02/02/2024] [Indexed: 02/15/2024] Open
Abstract
Breast cancer is a frequently occurring malignant tumor that is one of the leading causes of cancer-related deaths in women worldwide. Monoclonal antibodies that block programed cell death 1 (PD-1)/programed cell death ligand 1 (PD-L1) - a typical immune checkpoint - are currently the recommended standard therapies for many advanced and metastatic tumors such as triple-negative breast cancer. However, some patients develop drug resistance, leading to unfavorable treatment outcomes. Therefore, other approaches are required for anticancer treatments, such as downregulation of PD-L1 expression and promotion of degradation of PD-L1. Scoparone (SCO) is a bioactive compound isolated from Artemisia capillaris that exhibits antitumor activity. However, the effect of SCO on PD-L1 expression in cancer has not been confirmed yet. This study aimed to evaluate the role of SCO in PD-L1 expression in breast cancer cells in vitro. Our results show that SCO downregulated PD-L1 expression in a dose-dependent manner, via AKT inhibition. Interestingly, SCO treatment did not alter PTEN expression, but increased the expression of mitogen-activated protein kinase phosphatase-3 (MKP-3). In addition, the SCO-induced decrease in PD-L1 expression was reversed by siRNA-mediated MKP-3 knockdown. Collectively, these findings suggest that SCO inhibited the expression of PD-L1 in breast cancer cells by upregulating MKP-3 expression. Therefore, SCO may serve as an innovative combinatorial agent for cancer immunotherapy.
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Affiliation(s)
- Seung-Woo Kim
- Department of Biomedical Sciences, Inha University College of Medicine, Incheon, Republic of Korea
| | - Chan Woo Kim
- Cancer Immunotherapy Evaluation Team, Non-Clinical Evaluation Center, Osong Medical Innovation Foundation (KBIO Health), Cheongju, Republic of Korea
| | - Hong Seok Kim
- Department of Molecular Medicine, Inha University College of Medicine, Incheon, Republic of Korea
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8
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Zhang C, Pan G, Qin JJ. Role of F-box proteins in human upper gastrointestinal tumors. Biochim Biophys Acta Rev Cancer 2024; 1879:189035. [PMID: 38049014 DOI: 10.1016/j.bbcan.2023.189035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 11/22/2023] [Accepted: 11/25/2023] [Indexed: 12/06/2023]
Abstract
Protein ubiquitination and degradation is an essential physiological process in almost all organisms. As the key participants in this process, the E3 ubiquitin ligases have been widely studied and recognized. F-box proteins, a crucial component of E3 ubiquitin ligases that regulates diverse biological functions, including cell differentiation, proliferation, migration, and apoptosis by facilitating the degradation of substrate proteins. Currently, there is an increasing focus on studying the role of F-box proteins in cancer. In this review, we present a comprehensive overview of the significant contributions of F-box proteins to the development of upper gastrointestinal tumors, highlighting their dual roles as both carcinogens and tumor suppressors. We delve into the molecular mechanisms underlying the involvement of F-box proteins in upper gastrointestinal tumors, exploring their interactions with specific substrates and their cross-talks with other key signaling pathways. Furthermore, we discuss the implications of F-box proteins in radiotherapy resistance in the upper gastrointestinal tract, emphasizing their potential as clinical therapeutic and prognostic targets. Overall, this review provides an up-to-date understanding of the intricate involvement of F-box proteins in human upper gastrointestinal tumors, offering valuable insights for the identification of prognostic markers and the development of targeted therapeutic strategies.
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Affiliation(s)
- Che Zhang
- School of Molecular Medicine, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China; Zhejiang Cancer Hospital, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou 310022, China; Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Guangzhao Pan
- Zhejiang Cancer Hospital, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou 310022, China
| | - Jiang-Jiang Qin
- School of Molecular Medicine, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China; Zhejiang Cancer Hospital, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou 310022, China; Key Laboratory of Prevention, Diagnosis and Therapy of Upper Gastrointestinal Cancer of Zhejiang Province, Hangzhou 310022, China.
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9
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Ma C, Liu M, Feng W, Rao H, Zhang W, Liu C, Xu Y, Wang Z, Teng Y, Yang X, Ni L, Xu J, Gao W, Lu B, Li L. Loss of SETD2 aggravates colorectal cancer progression caused by SMAD4 deletion through the RAS/ERK signalling pathway. Clin Transl Med 2023; 13:e1475. [PMID: 37962020 PMCID: PMC10644329 DOI: 10.1002/ctm2.1475] [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: 06/15/2023] [Revised: 10/25/2023] [Accepted: 10/30/2023] [Indexed: 11/15/2023] Open
Abstract
BACKGOUND Colorectal cancer (CRC) is a complex, multistep disease that arises from the interplay genetic mutations and epigenetic alterations. The histone H3K36 trimethyltransferase SET domain-containing 2 (SETD2), as an epigenetic signalling molecule, has a 5% mutation rate in CRC. SETD2 expression is decreased in the development of human CRC and mice treated with Azoxymethane /Dextran sodium sulfate (AOM/DSS). Loss of SETD2 promoted CRC development. SMAD Family member 4 (SMAD4) has a 14% mutation rate in CRC, and SMAD4 ablation leads to CRC. The co-mutation of SETD2 and SMAD4 predicted advanced CRC. However, little is known on the potential synergistic effect of SETD2 and SMAD4. METHODS CRC tissues from mice and SW620 cells were used as research subjects. Clinical databases of CRC patients were analyzed to investigate the association between SETD2 and SMAD4. SETD2 and SMAD4 double-knockout mice were established to further investigate the role of SETD2 in SMAD4-deficient CRC. The intestinal epithelial cells (IECs) were isolated for RNA sequencing and chromatin immunoprecipitation sequencing (ChIP-seq) to explore the mechanism and the key molecules resulting in CRC. Molecular and cellular experiments were conducted to analyze the role of SETD2 in SMAD4-deficient CRC. Finally, rescue experiments were performed to confirm the molecular mechanism of SETD2 in the development of SMAD4-dificient CRC. RESULTS The deletion of SETD2 promotes the malignant progression of SMAD4-deficient CRC. Smad4Vil-KO ; Setd2Vil-KO mice developed a more severe CRC phenotype after AOM/DSS induction, with a larger tumour size and a more vigorous epithelial proliferation rate. Further mechanistic findings revealed that the loss of SETD2 resulted in the down-regulation of DUSP7, which is involved in the inhibition of the RAS/ERK signalling pathway. Finally, the ERK1/2 inhibitor SCH772984 significantly attenuated the progression of CRC in Smad4Vil-KO ;Setd2Vil-KO mice, and overexpression of DUSP7 significantly inhibited the proliferation rates of SETD2KO ; SMAD4KO SW620 cells. CONCLUSIONS Our results demonstrated that SETD2 inhibits the RAS/ERK signaling pathway by facilitating the transcription of DUSP7 in SMAD4-deficient CRC, which could provide a potential therapeutic target for the treatment of advanced CRC.
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Affiliation(s)
- Chunxiao Ma
- State Key Laboratory of Systems Medicine for CancerRenji‐Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong UniversityShanghaiChina
- School of Biomedical Engineering and Med‐X Research Institute, Shanghai Jiao Tong UniversityShanghaiChina
| | - Min Liu
- State Key Laboratory of Systems Medicine for CancerRenji‐Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong UniversityShanghaiChina
- School of Biomedical Engineering and Med‐X Research Institute, Shanghai Jiao Tong UniversityShanghaiChina
| | - Wenxin Feng
- State Key Laboratory of Systems Medicine for CancerRenji‐Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong UniversityShanghaiChina
- School of Biomedical Engineering and Med‐X Research Institute, Shanghai Jiao Tong UniversityShanghaiChina
| | - Hanyu Rao
- State Key Laboratory of Systems Medicine for CancerRenji‐Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong UniversityShanghaiChina
- School of Biomedical Engineering and Med‐X Research Institute, Shanghai Jiao Tong UniversityShanghaiChina
| | - Wei Zhang
- State Key Laboratory of Systems Medicine for CancerRenji‐Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong UniversityShanghaiChina
- School of Biomedical Engineering and Med‐X Research Institute, Shanghai Jiao Tong UniversityShanghaiChina
| | - Changwei Liu
- State Key Laboratory of Systems Medicine for CancerRenji‐Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong UniversityShanghaiChina
- School of Biomedical Engineering and Med‐X Research Institute, Shanghai Jiao Tong UniversityShanghaiChina
| | - Yue Xu
- State Key Laboratory of Systems Medicine for CancerRenji‐Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong UniversityShanghaiChina
- School of Biomedical Engineering and Med‐X Research Institute, Shanghai Jiao Tong UniversityShanghaiChina
| | - Ziyi Wang
- State Key Laboratory of Systems Medicine for CancerRenji‐Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong UniversityShanghaiChina
- School of Biomedical Engineering and Med‐X Research Institute, Shanghai Jiao Tong UniversityShanghaiChina
| | - Yan Teng
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein SciencesBeijing Institute of LifeomicsBeijingChina
| | - Xiao Yang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein SciencesBeijing Institute of LifeomicsBeijingChina
| | - Li Ni
- Department of NursingShanghai East Hospital, Tongji UniversityShanghaiChina
| | - Jin Xu
- School of Biomedical Engineering and Med‐X Research Institute, Shanghai Jiao Tong UniversityShanghaiChina
| | - Wei‐Qiang Gao
- State Key Laboratory of Systems Medicine for CancerRenji‐Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong UniversityShanghaiChina
- School of Biomedical Engineering and Med‐X Research Institute, Shanghai Jiao Tong UniversityShanghaiChina
| | - Bing Lu
- Department of General Surgery, Department of Colorectal Surgery, Shanghai East HospitalSchool of Medicine, Tongji UniversityShanghaiChina
| | - Li Li
- State Key Laboratory of Systems Medicine for CancerRenji‐Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine and School of Biomedical Engineering, Shanghai Jiao Tong UniversityShanghaiChina
- School of Biomedical Engineering and Med‐X Research Institute, Shanghai Jiao Tong UniversityShanghaiChina
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10
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Kesarwani M, Kincaid Z, Azhar M, Menke J, Schwieterman J, Ansari S, Reaves A, Deininger ME, Levine R, Grimes HL, Azam M. MAPK-negative feedback regulation confers dependence to JAK2 V617F signaling. Leukemia 2023; 37:1686-1697. [PMID: 37430058 PMCID: PMC10976185 DOI: 10.1038/s41375-023-01959-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 06/11/2023] [Accepted: 06/27/2023] [Indexed: 07/12/2023]
Abstract
Despite significant advances in developing selective JAK2 inhibitors, JAK2 kinase inhibitor (TKI) therapy is ineffective in suppressing the disease. Reactivation of compensatory MEK-ERK and PI3K survival pathways sustained by inflammatory cytokine signaling causes treatment failure. Concomitant inhibition of MAPK pathway and JAK2 signaling showed improved in vivo efficacy compared to JAK2 inhibition alone but lacked clonal selectivity. We hypothesized that cytokine signaling in JAK2V617F induced MPNs increases the apoptotic threshold that causes TKI persistence or refractoriness. Here, we show that JAK2V617F and cytokine signaling converge to induce MAPK negative regulator, DUSP1. Enhanced DUSP1 expression blocks p38 mediated p53 stabilization. Deletion of Dusp1 increases p53 levels in the context of JAK2V617F signaling that causes synthetic lethality to Jak2V617F expressing cells. However, inhibition of Dusp1 by a small molecule inhibitor (BCI) failed to impart Jak2V617F clonal selectivity due to pErk1/2 rebound caused by off-target inhibition of Dusp6. Ectopic expression of Dusp6 and BCI treatment restored clonal selectively and eradicated the Jak2V617F cells. Our study shows that inflammatory cytokines and JAK2V617F signaling converge to induce DUSP1, which downregulates p53 and establishes a higher apoptotic threshold. These data suggest that selectively targeting DUSP1 may provide a curative response in JAK2V617F-driven MPN.
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Affiliation(s)
- Meenu Kesarwani
- Division of Pathology, Cincinnati Children's Hospital, Cincinnati, OH, USA
| | - Zachary Kincaid
- Division of Pathology, Cincinnati Children's Hospital, Cincinnati, OH, USA
| | - Mohammad Azhar
- Division of Pathology, Cincinnati Children's Hospital, Cincinnati, OH, USA
| | - Jacob Menke
- Division of Pathology, Cincinnati Children's Hospital, Cincinnati, OH, USA
| | | | - Sekhu Ansari
- Division of Pathology, Cincinnati Children's Hospital, Cincinnati, OH, USA
| | - Angela Reaves
- Division of Pathology, Cincinnati Children's Hospital, Cincinnati, OH, USA
| | - Michael E Deininger
- Versiti Blood Research Institute and Medical College of Wisconsin, Milwaukee, WI, USA
| | - Ross Levine
- Center for Hematologic Malignancies, and Molecular Cancer Medicine Service, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | - H Leighton Grimes
- Division of Immunobiology, Cincinnati Children's Hospital, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital, Cincinnati, OH, USA
| | - Mohammad Azam
- Division of Pathology, Cincinnati Children's Hospital, Cincinnati, OH, USA.
- Department of Pediatrics, University of Cincinnati, Cincinnati, OH, USA.
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital, Cincinnati, OH, USA.
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11
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Zhu H, Wang J, Xin T, Chen S, Hu R, Li Y, Zhang M, Zhou H. DUSP1 interacts with and dephosphorylates VCP to improve mitochondrial quality control against endotoxemia-induced myocardial dysfunction. Cell Mol Life Sci 2023; 80:213. [PMID: 37464072 PMCID: PMC11072740 DOI: 10.1007/s00018-023-04863-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/01/2023] [Accepted: 07/07/2023] [Indexed: 07/20/2023]
Abstract
Dual specificity phosphatase 1 (DUSP1) and valosin-containing protein (VCP) have both been reported to regulate mitochondrial homeostasis. However, their impact on mitochondrial quality control (MQC) and myocardial function during LPS-induced endotoxemia remains unclear. We addressed this issue by modeling LPS-induced endotoxemia in DUSP1 transgenic (DUSP1TG) mice and in cultured DUSP1-overexpressing HL-1 cardiomyocytes. Accompanying characteristic structural and functional deficits, cardiac DUSP1 expression was significantly downregulated following endotoxemia induction in wild type mice. In contrast, markedly reduced myocardial inflammation, cardiomyocyte apoptosis, cardiac structural disorder, cardiac injury marker levels, and normalized systolic/diastolic function were observed in DUSP1TG mice. Furthermore, DUSP1 overexpression in HL-1 cells significantly attenuated LPS-mediated mitochondrial dysfunction by preserving MQC, as indicated by normalized mitochondrial dynamics, improved mitophagy, enhanced biogenesis, and attenuated mitochondrial unfolded protein response. Molecular assays showed that VCP was a substrate of DUSP1 and the interaction between DUSP1 and VCP primarily occurred on the mitochondria. Mechanistically, DUSP1 phosphatase domain promoted the physiological DUSP1/VCP interaction which prevented LPS-mediated VCP Ser784 phosphorylation. Accordingly, transfection with a phosphomimetic VCP mutant abolished the protective actions of DUSP1 on MQC and aggravated inflammation, apoptosis, and contractility/relaxation capacity in HL-1 cardiomyocytes. These findings support the involvement of the novel DUSP1/VCP/MQC pathway in the pathogenesis of endotoxemia-caused myocardial dysfunction.
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Affiliation(s)
- Hang Zhu
- Senior Department of Cardiology, The Sixth Medical Center of People's Liberation Army General Hospital, Beijing, 100048, China
| | - Jin Wang
- Department of Vascular Medicine, Peking University Shougang Hospital, Beijing, 100144, China
| | - Ting Xin
- Department of Cardiology, Tianjin First Central Hospital, 24 Fukang Road, Nankai District, Tianjin, 300192, People's Republic of China
| | - Shanshan Chen
- Senior Department of Cardiology, The Sixth Medical Center of People's Liberation Army General Hospital, Beijing, 100048, China
| | - Ruiying Hu
- Senior Department of Cardiology, The Sixth Medical Center of People's Liberation Army General Hospital, Beijing, 100048, China
| | - Yukun Li
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing, 100029, China
| | - Mingming Zhang
- Department of Cardiology, Tangdu Hospital, Air Force Medical University, Xi'an, 710038, China.
| | - Hao Zhou
- Senior Department of Cardiology, The Sixth Medical Center of People's Liberation Army General Hospital, Beijing, 100048, China.
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12
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Martin-Vega A, Earnest S, Augustyn A, Wichaidit C, Gazdar A, Girard L, Peyton M, Kollipara RK, Minna JD, Johnson JE, Cobb MH. ASCL1-ERK1/2 Axis: ASCL1 restrains ERK1/2 via the dual specificity phosphatase DUSP6 to promote survival of a subset of neuroendocrine lung cancers. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.15.545148. [PMID: 37398419 PMCID: PMC10312738 DOI: 10.1101/2023.06.15.545148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
The transcription factor achaete-scute complex homolog 1 (ASCL1) is a lineage oncogene that is central for the growth and survival of small cell lung cancers (SCLC) and neuroendocrine non-small cell lung cancers (NSCLC-NE) that express it. Targeting ASCL1, or its downstream pathways, remains a challenge. However, a potential clue to overcoming this challenage has been information that SCLC and NSCLC-NE that express ASCL1 exhibit extremely low ERK1/2 activity, and efforts to increase ERK1/2 activity lead to inhibition of SCLC growth and surival. Of course, this is in dramatic contrast to the majority of NSCLCs where high activity of the ERK pathway plays a major role in cancer pathogenesis. A major knowledge gap is defining the mechanism(s) underlying the low ERK1/2 activity in SCLC, determining if ERK1/2 activity and ASCL1 function are inter-related, and if manipulating ERK1/2 activity provides a new therapeutic strategy for SCLC. We first found that expression of ERK signaling and ASCL1 have an inverse relationship in NE lung cancers: knocking down ASCL1 in SCLCs and NE-NSCLCs increased active ERK1/2, while inhibition of residual SCLC/NSCLC-NE ERK1/2 activity with a MEK inhibitor increased ASCL1 expression. To determine the effects of ERK activity on expression of other genes, we obtained RNA-seq from ASCL1-expressing lung tumor cells treated with an ERK pathway MEK inhibitor and identified down-regulated genes (such as SPRY4, ETV5, DUSP6, SPRED1) that potentially could influence SCLC/NSCLC-NE tumor cell survival. This led us to discover that genes regulated by MEK inhibition suppress ERK activation and CHIP-seq demonstrated these are bound by ASCL1. In addition, SPRY4, DUSP6, SPRED1 are known suppressors of the ERK1/2 pathway, while ETV5 regulates DUSP6. Survival of NE lung tumors was inhibited by activation of ERK1/2 and a subset of ASCL1-high NE lung tumors expressed DUSP6. Because the dual specificity phosphatase 6 (DUSP6) is an ERK1/2-selective phosphatase that inactivates these kinases and has a pharmacologic inhibitor, we focused mechanistic studies on DUSP6. These studies showed: Inhibition of DUSP6 increased active ERK1/2, which accumulated in the nucleus; pharmacologic and genetic inhibition of DUSP6 affected proliferation and survival of ASCL1-high NE lung cancers; and that knockout of DUSP6 "cured" some SCLCs while in others resistance rapidly developed indicating a bypass mechanism was activated. Thus, our findings fill this knowledge gap and indicate that combined expression of ASCL1, DUSP6 and low phospho-ERK1/2 identify some neuroendocrine lung cancers for which DUSP6 may be a therapeutic target.
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13
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Mori Sequeiros Garcia MM, Paz C, Castillo AF, Benzo Y, Belluno MA, Balcázar Martínez A, Maloberti PM, Cornejo Maciel F, Poderoso C. New insights into signal transduction pathways in adrenal steroidogenesis: role of mitochondrial fusion, lipid mediators, and MAPK phosphatases. Front Endocrinol (Lausanne) 2023; 14:1175677. [PMID: 37223023 PMCID: PMC10200866 DOI: 10.3389/fendo.2023.1175677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 04/17/2023] [Indexed: 05/25/2023] Open
Abstract
Hormone-receptor signal transduction has been extensively studied in adrenal gland. Zona glomerulosa and fasciculata cells are responsible for glucocorticoid and mineralocorticoid synthesis by adrenocorticotropin (ACTH) and angiotensin II (Ang II) stimulation, respectively. Since the rate-limiting step in steroidogenesis occurs in the mitochondria, these organelles are key players in the process. The maintenance of functional mitochondria depends on mitochondrial dynamics, which involves at least two opposite events, i.e., mitochondrial fusion and fission. This review presents state-of-the-art data on the role of mitochondrial fusion proteins, such as mitofusin 2 (Mfn2) and optic atrophy 1 (OPA1), in Ang II-stimulated steroidogenesis in adrenocortical cells. Both proteins are upregulated by Ang II, and Mfn2 is strictly necessary for adrenal steroid synthesis. The signaling cascades of steroidogenic hormones involve an increase in several lipidic metabolites such as arachidonic acid (AA). In turn, AA metabolization renders several eicosanoids released to the extracellular medium able to bind membrane receptors. This report discusses OXER1, an oxoeicosanoid receptor which has recently arisen as a novel participant in adrenocortical hormone-stimulated steroidogenesis through its activation by AA-derived 5-oxo-ETE. This work also intends to broaden knowledge of phospho/dephosphorylation relevance in adrenocortical cells, particularly MAP kinase phosphatases (MKPs) role in steroidogenesis. At least three MKPs participate in steroid production and processes such as the cellular cycle, either directly or by means of MAP kinase regulation. To sum up, this review discusses the emerging role of mitochondrial fusion proteins, OXER1 and MKPs in the regulation of steroid synthesis in adrenal cortex cells.
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Affiliation(s)
- María Mercedes Mori Sequeiros Garcia
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Investigaciones Biomédicas (INBIOMED), Buenos Aires, Argentina
| | - Cristina Paz
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Investigaciones Biomédicas (INBIOMED), Buenos Aires, Argentina
| | - Ana Fernanda Castillo
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Investigaciones Biomédicas (INBIOMED), Buenos Aires, Argentina
| | - Yanina Benzo
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Investigaciones Biomédicas (INBIOMED), Buenos Aires, Argentina
| | - Matías A. Belluno
- CONICET-Universidad de Buenos Aires, Instituto de Investigaciones Biomédicas (INBIOMED), Buenos Aires, Argentina
| | - Ariana Balcázar Martínez
- CONICET-Universidad de Buenos Aires, Instituto de Investigaciones Biomédicas (INBIOMED), Buenos Aires, Argentina
| | - Paula Mariana Maloberti
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Investigaciones Biomédicas (INBIOMED), Buenos Aires, Argentina
| | - Fabiana Cornejo Maciel
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Investigaciones Biomédicas (INBIOMED), Buenos Aires, Argentina
| | - Cecilia Poderoso
- Universidad de Buenos Aires, Facultad de Medicina, Departamento de Bioquímica Humana, Buenos Aires, Argentina
- CONICET-Universidad de Buenos Aires, Instituto de Investigaciones Biomédicas (INBIOMED), Buenos Aires, Argentina
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14
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Song NN, Zhao Y, Sun C, Zhang J, Lin GJ, Yin XW, Ma CY. DUSP10 alleviates ischemic stroke-induced neuronal damage by restricting p38/JNK pathway. Behav Brain Res 2023; 450:114478. [PMID: 37164190 DOI: 10.1016/j.bbr.2023.114478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 04/23/2023] [Accepted: 05/06/2023] [Indexed: 05/12/2023]
Abstract
Neuronal apoptosis is considered one of the hallmarks of ischemic stroke. Dual specificity phosphatase 10 (DUSP10), a member of the dual-specificity phosphatase family, which is involved in the regulation of apoptosis process. This study aimed to investigate the effect of on apoptosis in primary cortical neurons exposed to oxygen-glucose deprivation and reoxygenation (OGD/R) and mice suffered from transient middle cerebral artery occlusion and reperfusion (MCAO/R). The results showed that DUSP10 overexpression improved survival and reduced apoptosis in neurons subjected to OGD/R, which was manifested by decreased apoptotic proteins (cleaved caspase 3 and bax) and TUNEL+ cells, as well as increased the anti-apoptotic protein (bcl-2). DUSP10 overexpression inhibited the p38/JNK signaling pathway after OGD/R treatment, whilst DUSP10 knockdown had opposite effects. In addition, the p38 inhibitor SB203580 or JNK inhibitor SP600125 attenuated the increased apoptosis of OGD/R-stimulated neurons treated with DUSP10 silencing. Consistently, DUSP10 knockdown exacerbated infarct volume in MCAO/R injury. The data of Nissl staining and TUNEL-NeuN double staining revealed that DUSP10 interference aggravated neuronal damage in the ischemic penumbra of mice. Furthermore, DUSP10 inhibition activated the p38/JNK axis accompanied by enhanced phosphorylation of p38 and JNK in vivo. In summary, DUSP10 is a neuroprotective agent against ischemic stroke-induced neuronal damage via suppressing the p38/JNK signaling pathway.
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Affiliation(s)
- Ni-Na Song
- Department of Neurology, the Second Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Ying Zhao
- Department of Neurology, the Second Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Chuang Sun
- Department of Radiology, the Second Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Jun Zhang
- Department of Neurology, the Second Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Guang-Jun Lin
- Department of Neurology, the Second Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Xiao-Wei Yin
- Department of Neurology, the Second Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Chun-Ye Ma
- Department of Neurology, the Second Hospital of Dalian Medical University, Dalian, Liaoning, China.
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15
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Díaz-Mora E, González-Romero D, Meireles-da-Silva M, Sanz-Ezquerro JJ, Cuenda A. p38δ controls Mitogen- and Stress-activated Kinase-1 (MSK1) function in response to toll-like receptor activation in macrophages. Front Cell Dev Biol 2023; 11:1083033. [PMID: 36846591 PMCID: PMC9946961 DOI: 10.3389/fcell.2023.1083033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 01/27/2023] [Indexed: 02/11/2023] Open
Abstract
Mitogen- and Stress-activated Kinase (MSK) 1 is a nuclear protein, activated by p38α Mitogen-Activated Kinase (MAPK) and extracellular signal-regulated kinase (ERK1/2), that modulate the production of certain cytokines in macrophages. Using knockout cells and specific kinase inhibitors, we show that, besides p38α and ERK1/2, another p38MAPK, p38δ, mediates MSK phosphorylation and activation, in LPS-stimulated macrophages. Additionally, recombinant MSK1 was phosphorylated and activated by recombinant p38δ, to the same extent than by p38α, in in vitro experiments. Moreover, the phosphorylation of the transcription factors CREB and ATF1, that are MSK physiological substrates, and the expression of the CREB-dependent gene encoding DUSP1, were impaired in p38δ-deficient macrophages. Also, the transcription of IL-1Ra mRNA, that is MSK-dependent, was reduced. Our results indicate that MSK activation can be one possible mechanism by which p38δ regulates the production of a variety of inflammatory molecules involved in immune innate response.
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Affiliation(s)
- Ester Díaz-Mora
- Department of Immunology and Oncology, Centro Nacional de Biotecnología/CSIC (CNB-CSIC), Madrid, Spain
| | - Diego González-Romero
- Department of Immunology and Oncology, Centro Nacional de Biotecnología/CSIC (CNB-CSIC), Madrid, Spain
| | - Marta Meireles-da-Silva
- Department of Immunology and Oncology, Centro Nacional de Biotecnología/CSIC (CNB-CSIC), Madrid, Spain
| | - Juan José Sanz-Ezquerro
- Department of Molecular and Cellular Biology, Centro Nacional de Biotecnología/CSIC (CNB-CSIC), Madrid, Spain
| | - Ana Cuenda
- Department of Immunology and Oncology, Centro Nacional de Biotecnología/CSIC (CNB-CSIC), Madrid, Spain,*Correspondence: Ana Cuenda,
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16
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Su X, Su Z, Xu W. ROS elevate HIF-1α phosphorylation for insect lifespan through the CK2-MKP3-p38 pathway. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2023; 1870:119389. [PMID: 36372111 DOI: 10.1016/j.bbamcr.2022.119389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 11/03/2022] [Accepted: 11/05/2022] [Indexed: 11/13/2022]
Abstract
Diapause in insects is akin to dauer in Caenorhabditis elegans and hibernation in vertebrates, characterized by metabolic depression and lifespan extension. Previous studies have shown that reactive oxygen species (ROS) and hypoxia-inducible factor-1α (HIF-1α) in brains of diapause-destined pupae are more abundant than those in nondiapause-destined pupae in Helicoverpa armigera, but the ROS regulating HIF-1α activity remain unknown. Here, we showed that high ROS levels in brains of diapause-destined pupae resulted in low casein kinase 2 (CK2) activity and that downregulation of CK2 caused low expression of mitogen-activated protein kinase phosphatase 3 (MKP3), which is an inhibitor of p-p38. Thus, high p-p38 levels accumulate to improve HIF-1α activity via activating HIF-1α phosphorylation at the S732 residue to regulate insect diapause. This is the first report showing that a new pathway, ROS-CK2-MKP3-p38, regulates HIF-1α activity for lifespan in insects.
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Affiliation(s)
- Xiaolong Su
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Zhiren Su
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510006, China
| | - Weihua Xu
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510006, China.
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17
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Xu W, Nie C, Chen X. DUSP4 inhibits autophagic cell death and apoptosis in colorectal cancer by regulating BCL2-Beclin1/Bax signaling. Mol Biol Rep 2023; 50:3229-3239. [PMID: 36705792 DOI: 10.1007/s11033-023-08270-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 01/10/2023] [Indexed: 01/28/2023]
Abstract
BACKGROUND The DUSP4 gene plays an important role in the carcinogenesis of colorectal cancer (CRC). However, the underlying mechanism of DUSP4-regulated colorectal carcinogenesis is unknown. DUSP4 is a negative regulator of the MAP kinase (MAPK) JNK, and JNK-mediated BCL2 phosphorylation is associated with apoptosis and autophagic cell death. Our study aimed to explore the significance of BCL2 phosphorylation-dependent autophagy and apoptosis in DUSP4-promoted colorectal carcinogenesis. METHODS We first investigated the roles of DUSP4 in the survival of HCT116 and SW480 CRC cell lines using gene-silencing and -overexpression techniques. Next, we explored the effects of DUSP4 on the BCL2 phosphorylation, autophagy and apoptosis of HCT116 and SW480 cells. Ultimately, with the help of pharmacological inhibitors of Beclin1 and BCL2 (spautin-1 and ABT-737), the relationship between BCL2-Beclin1/Bax signaling and DUSP4-regulated autophagy, apoptosis, survival and migration in HCT116 cells was clarified. RESULTS Our results first confirmed the contribution of DUSP4 to the survival of HCT116 and SW480 cells. In addition, DUSP4 silencing resulted in BCL2 phosphorylation and the enhancement in autophagy and apoptosis in HCT116 and SW480 cells, while DUSP4 overexpression showed the opposite effect. Moreover, DUSP4 silencing inhibited the protein interaction between BCL2 and Beclin1 or Bax in HCT116 cells. Moreover, the survival and migration of HCT116 cells inhibited by DUSP4 silencing were blocked by autophagy inhibition with spautin-1. Notably, the survival and migration of HCT116 cells promoted by DUSP4 overexpression were reversed by ABT-737. CONCLUSIONS It was indicated that DUSP4 can maintain the survival and function of CRC cells by inhibiting BCL2 phosphorylation-dependent autophagic cell death and apoptosis.
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Affiliation(s)
- Weifeng Xu
- Department of Medical Oncology, The Affiliated Cancer Hospital of Zhengzhou University, No.127 Dong Ming Road, Zhengzhou, 450008, Henan, People's Republic of China
| | - Caiyun Nie
- Department of Medical Oncology, The Affiliated Cancer Hospital of Zhengzhou University, No.127 Dong Ming Road, Zhengzhou, 450008, Henan, People's Republic of China
| | - Xiaobing Chen
- Department of Medical Oncology, The Affiliated Cancer Hospital of Zhengzhou University, No.127 Dong Ming Road, Zhengzhou, 450008, Henan, People's Republic of China.
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18
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Kong T, Laranjeira ABA, Yang K, Fisher DAC, Yu L, Poittevin De La Frégonnière L, Wang AZ, Ruzinova MB, Fowles JS, Fulbright MC, Cox MJ, Celik H, Challen GA, Huang S, Oh ST. DUSP6 mediates resistance to JAK2 inhibition and drives leukemic progression. NATURE CANCER 2023; 4:108-127. [PMID: 36581736 DOI: 10.1038/s43018-022-00486-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 11/08/2022] [Indexed: 12/31/2022]
Abstract
Myeloproliferative neoplasms (MPNs) exhibit a propensity for transformation to secondary acute myeloid leukemia (sAML), for which the underlying mechanisms remain poorly understood, resulting in limited treatment options and dismal clinical outcomes. Here, we performed single-cell RNA sequencing on serial MPN and sAML patient stem and progenitor cells, identifying aberrantly increased expression of DUSP6 underlying disease transformation. Pharmacologic dual-specificity phosphatase (DUSP)6 targeting led to inhibition of S6 and Janus kinase (JAK)-signal transducer and activator of transcription (STAT) signaling while also reducing inflammatory cytokine production. DUSP6 perturbation further inhibited ribosomal S6 kinase (RSK)1, which we identified as a second indispensable candidate associated with poor clinical outcome. Ectopic expression of DUSP6 mediated JAK2-inhibitor resistance and exacerbated disease severity in patient-derived xenograft (PDX) models. Contrastingly, DUSP6 inhibition potently suppressed disease development across Jak2V617F and MPLW515L MPN mouse models and sAML PDXs without inducing toxicity in healthy controls. These findings underscore DUSP6 in driving disease transformation and highlight the DUSP6-RSK1 axis as a vulnerable, druggable pathway in myeloid malignancies.
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Affiliation(s)
- Tim Kong
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Angelo B A Laranjeira
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Kangning Yang
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec, Canada
| | - Daniel A C Fisher
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - LaYow Yu
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Laure Poittevin De La Frégonnière
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec, Canada
| | - Anthony Z Wang
- Department of Neurological Surgery, Washington University School of Medicine, St. Louis, MO, USA
| | - Marianna B Ruzinova
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - Jared S Fowles
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Mary C Fulbright
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Maggie J Cox
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Hamza Celik
- Division of Oncology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Grant A Challen
- Division of Oncology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA
| | - Sidong Huang
- Department of Biochemistry, McGill University, Montreal, Quebec, Canada
- Goodman Cancer Research Centre, McGill University, Montreal, Quebec, Canada
| | - Stephen T Oh
- Division of Hematology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA.
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO, USA.
- Immunomonitoring Laboratory, Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St. Louis, MO, USA.
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19
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Aughton K, Sabat-Pośpiech D, Barlow S, Coupland SE, Kalirai H. Investigating the Role of DUSP4 in Uveal Melanoma. Transl Vis Sci Technol 2022; 11:13. [PMID: 36576731 PMCID: PMC9804032 DOI: 10.1167/tvst.11.12.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Purpose Dual-specificity phosphatase 4 (DUSP4) inactivates factors in the mitogen-activated protein kinase (MAPK) signaling cascade, activated in uveal melanoma (UM) by mutations in upstream G-protein α subunits GNAQ/11 in >90% cases. This study examined whether DUSP4 (1) protein expression in primary UM (pUM) was a biomarker of metastatic risk and (2) knockdown sensitized UM cells to therapeutic agents, selumetinib or doxorubicin. Methods DUSP4 mRNA data from The Cancer Genome Atlas and DUSP4 protein expression examined using immunohistochemistry in 28 cases of pUM were evaluated for association with clinical, genetic, and histological features. In vitro cytotoxic drug assays tested the efficacy of selumetinib and doxorubicin in UM cell lines with/without small interfering RNA DUSP4 gene silencing. Results DUSP4 protein expression was observed in 93% of cases, with strong nuclear positivity in 79%. Despite higher DUSP4 messenger RNA levels in disomy 3/wild-type BAP1 UM, there was no significant association of nDUSP4 protein with these metastatic risk predictors or outcome. DUSP4 expression in UM cell lines varied. DUSP4 silencing in Mel202, MP46, and MP41 cells did not affect ERK1/2 or phospho-ERK levels. Despite increased phospho-ERK levels in Mel285, no cell line showed enhanced sensitivity to selumetinib/doxorubicin. Conclusions DUSP4 protein expression is not a biomarker of UM metastatic risk. DUSP4 plays a complex role in oncogenesis, as reported in other cancers, and further work is required to fully understand its functional role in the MAPK pathway. Translational Relevance Understanding the role of phosphatases, such as DUSP4, in the control of intracellular signaling cascades will facilitate our ability to identify successful treatment options.
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Affiliation(s)
- Karen Aughton
- Liverpool Ocular Oncology Research Group, University of Liverpool, Molecular and Clinical Cancer Medicine, Institute of Systems Molecular & Integrative Biology, University of Liverpool, Liverpool, UK
| | - Dorota Sabat-Pośpiech
- Liverpool Ocular Oncology Research Group, University of Liverpool, Molecular and Clinical Cancer Medicine, Institute of Systems Molecular & Integrative Biology, University of Liverpool, Liverpool, UK
| | - Samantha Barlow
- Liverpool Ocular Oncology Research Group, University of Liverpool, Molecular and Clinical Cancer Medicine, Institute of Systems Molecular & Integrative Biology, University of Liverpool, Liverpool, UK,Liverpool Clinical Laboratories, Liverpool University Hospital Foundation Trust, Liverpool, UK
| | - Sarah E. Coupland
- Liverpool Ocular Oncology Research Group, University of Liverpool, Molecular and Clinical Cancer Medicine, Institute of Systems Molecular & Integrative Biology, University of Liverpool, Liverpool, UK,Liverpool Clinical Laboratories, Liverpool University Hospital Foundation Trust, Liverpool, UK
| | - Helen Kalirai
- Liverpool Ocular Oncology Research Group, University of Liverpool, Molecular and Clinical Cancer Medicine, Institute of Systems Molecular & Integrative Biology, University of Liverpool, Liverpool, UK,Liverpool Clinical Laboratories, Liverpool University Hospital Foundation Trust, Liverpool, UK
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20
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BAF53A drives colorectal cancer development by regulating DUSP5-mediated ERK phosphorylation. Cell Death Dis 2022; 13:1049. [PMID: 36526622 PMCID: PMC9758165 DOI: 10.1038/s41419-022-05499-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 12/02/2022] [Accepted: 12/06/2022] [Indexed: 12/23/2022]
Abstract
BAF53A, an important subunit of the SWI/SNF epigenetic chromatin regulatory complex, has been implicated as the driver of diverse cancers. However, the role of BAF53A in colorectal cancer (CRC) remains poorly understood. Here, we examined the expression of BAF53A in CRC samples and observed that BAF53A was significantly upregulated in CRC tissues compared with paired adjacent normal tissues. In vitro and in vivo studies suggested that ectopic expression of BAF53A promoted colorectal cancer cell proliferation, colony formation, and tumorigenesis, whereas knockdown of BAF53A hindered these cellular functions. DUSP5 (dual-specificity phosphatase 5), an ERK1/2-specific endogenous phosphatase, was expressed at low levels in CRC. We found a negative correlation between BAF53A and DUSP5 expression in a set of CRC samples. Mechanistic studies revealed that P63 was a potential transcription repressor of DUSP5. BAF53A could interact with P63, decreasing the DUSP5 expression level and subsequently promoting ERK1/2 phosphorylation. Thus, our study provides insights into the applicability of the BAF53A-DUSP5-ERK1/2 axis as a potential therapeutic target in CRC.
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21
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Tan Y, Xi D, Cai C, Jiang X, Chen S, Hu R, Xin T, Li Y, Wang S, Chang X, Zhou H. DUSP1 overexpression attenuates septic cardiomyopathy through reducing VCP phosphorylation and normalizing mitochondrial quality control. Acta Pharm Sin B 2022. [DOI: 10.1016/j.apsb.2022.12.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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22
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AGBEKTAS T, ZONTUL C, OZTURK A, HUSEYNZADA A, GANBAROVA R, HASANOVA U, CINAR G, TAS A, KAYA S, CHTITA S, SİLİG Y. EFFECT of AZOMETHINE GROUP CONTAINING COMPOUNDS on GENE PROFILES in Wnt and MAPK SIGNAL PATTERNS in LUNG CANCER CELL LINE: In Silico and In Vitro ANALYSES. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Sui X, Mao X, Wu G, Meng Q. DUSP1 promotes muscle atrophy by inhibiting myocyte differentiation in cachectic patients. Front Oncol 2022; 12:1040112. [PMID: 36387242 PMCID: PMC9663480 DOI: 10.3389/fonc.2022.1040112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 10/03/2022] [Indexed: 01/07/2024] Open
Abstract
BACKGROUND Skeletal muscle atrophy is the major hallmark of cancer cachexia. The mechanisms underlying muscle wasting remain elusive in cachectic patients. Our research seeks to identify differentially expressed genes (DEGs) between non-cachectic and cachectic cancer patients and elucidate their functions. METHODS We screened the DEGs of skeletal muscle between patients with and without cachexia from microarray data. Biological function of DEGs is analyzed through gene enrichment analysis, while an interaction network is constructed to visualize how genes are related. A Spearman's correlation analysis demonstrated the clinical significance of DUSP1 related to cancer cachexia. Skeletal muscle samples were collected and histomorphology studies were conducted. Function of DUSP1 on myogenesis was clarified by qPCR, western blotting, and immunofluorescence. RESULTS We screened 324 DEGs in skeletal muscle from patients with and without cachexia. The results of the gene enrichment analysis indicated that inflammatory cytokines and immune responses contribute significantly to the pathological condition of cachexia. DUSP1 was one of the key genes in the regulating network. DUSP1 protein and mRNA levels were increased significantly in skeletal muscle tissues from patients with cancer cachexia. DUSP1 expression in cachectic group was found to have negative correlation with SMA, prealbumin and BMI and positive correlation with TNFα, IL6 and weight loss. Significant changes of myogenesis related genes were observed in myocyte after DUSP1 was overexpressed and knocked down. CONCLUSION In skeletal muscle of cachectic patients, DUSP1 expression was observed to be higher and thus DUSP1 promote muscle atrophy by inhibiting myogenesis. DUSP1 is expected to be a specific target in cancer cachexia for preventing and treating muscle atrophy.
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Affiliation(s)
| | - Xiangyu Mao
- Department of General Surgery, Zhongshan Hospital of Fudan University, Shanghai, China
| | - Guohao Wu
- Department of General Surgery, Zhongshan Hospital of Fudan University, Shanghai, China
| | - Qingyang Meng
- Department of General Surgery, Zhongshan Hospital of Fudan University, Shanghai, China
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24
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Thompson EM, Patel V, Rajeeve V, Cutillas PR, Stoker AW. The cytotoxic action of BCI is not dependent on its stated DUSP1 or DUSP6 targets in neuroblastoma cells. FEBS Open Bio 2022; 12:1388-1405. [PMID: 35478300 PMCID: PMC9249316 DOI: 10.1002/2211-5463.13418] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 04/04/2022] [Accepted: 04/26/2022] [Indexed: 12/04/2022] Open
Abstract
Neuroblastoma (NB) is a heterogeneous cancer of the sympathetic nervous system, which accounts for 7-10% of paediatric malignancies worldwide. Due to the lack of targetable molecular aberrations in NB, most treatment options remain relatively nonspecific. Here, we investigated the therapeutic potential of BCI, an inhibitor of DUSP1 and DUSP6, in cultured NB cells. BCI was cytotoxic in a range of NB cell lines and induced a short-lived activation of the AKT and stress-inducible MAP kinases, although ERK phosphorylation was unaffected. Furthermore, a phosphoproteomic screen identified significant upregulation of JNK signalling components and suppression in mTOR and R6K signalling. To assess the specificity of BCI, CRISPR-Cas9 was employed to introduce insertions and deletions in the DUSP1 and DUSP6 genes. Surprisingly, BCI remained fully cytotoxic in NB cells with complete loss of DUSP6 and partial depletion of DUSP1, suggesting that BCI exerts cytotoxicity in NB cells through a complex mechanism that is unrelated to these phosphatases. Overall, these data highlight the risk of using an inhibitor such as BCI as supposedly specific DUSP1/6, without understanding its full range of targets in cancer cells.
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Affiliation(s)
- Elliott M. Thompson
- Developmental Biology & Cancer Research and Teaching DepartmentUCL Great Ormond Street Institute of Child HealthLondonUK
| | - Vruti Patel
- Developmental Biology & Cancer Research and Teaching DepartmentUCL Great Ormond Street Institute of Child HealthLondonUK
- Present address:
Current Address: Discovery Research MRL UKMSDThe London Bioscience Innovation Centre (LBIC)LondonUK
| | - Vinothini Rajeeve
- Mass Spectrometry LaboratoryBarts Cancer InstituteQueen Mary University of LondonUK
| | - Pedro R Cutillas
- Mass Spectrometry LaboratoryBarts Cancer InstituteQueen Mary University of LondonUK
| | - Andrew W. Stoker
- Developmental Biology & Cancer Research and Teaching DepartmentUCL Great Ormond Street Institute of Child HealthLondonUK
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Ding S, Gao Y, Lv D, Tao Y, Liu S, Chen C, Huang Z, Zheng S, Hu Y, Chow LKY, Wei Y, Feng P, Dai W, Wang X, Xia Y. DNTTIP1 promotes nasopharyngeal carcinoma metastasis via recruiting HDAC1 to DUSP2 promoter and activating ERK signaling pathway. EBioMedicine 2022; 81:104100. [PMID: 35689852 PMCID: PMC9189780 DOI: 10.1016/j.ebiom.2022.104100] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 05/13/2022] [Accepted: 05/22/2022] [Indexed: 11/21/2022] Open
Abstract
Background Distant metastasis remains the leading cause of treatment failure in patients with nasopharyngeal carcinoma (NPC), making it critical to identify efficient therapeutic targets for metastatic NPC. Previous studies have demonstrated that deoxynucleotidyltransferase terminal-interacting protein 1 (DNTTIP1) is associated with the development of various types of cancer. However, its role and mechanism in NPC have not been explored. Methods RNA-seq profiling was performed for three pairs of NPC and normal nasopharynx tissues. DNTTIP1 expression in NPC specimens was detected by immunohistochemistry. In vitro and in vivo assays were used to investigate the function of DNTTIP1. The molecular mechanism was determined using RT-qPCR, western blotting, RNA-seq, luciferase reporter assays, ChIP assays, and co-IP assays. Findings DNTTIP1 was found to be significantly upregulated in NPC tissues. Furthermore, DNTTIP1 promoted NPC growth and metastasis in vitro and in vivo. Upregulation of DNTTIP1 in NPC indicated poor clinical outcomes. Mechanistically, DNTTIP1 suppressed DUSP2 gene expression via recruiting HDAC1 to its promoter and maintaining a deacetylated state of histone H3K27. The downregulation of DUSP2 resulted in aberrant activation of the ERK signaling and elevated MMP2 levels, promoting NPC metastasis. Chidamide, an HDAC inhibitor, was shown to suppress NPC metastasis by regulating the DNTTIP1/HDAC1-DUSP2 axis. Interpretation Our findings demonstrate that DNTTIP1 not only regulates NPC metastasis but also independently predicts NPC prognosis. Furthermore, targeting DNTTIP1/HDAC1 by Chidamide may benefit NPC patients with metastasis. Funding This work was supported by the National Natural Science Foundation of China (No. 81872464, 82073243).
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Affiliation(s)
- Shirong Ding
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China; Department of Radiation Oncology, Sun Yat-sen University Cancer Centre, Guangzhou, China
| | - Ying Gao
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Dongming Lv
- Department of Burn and Plastic Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yalan Tao
- Department of Radiation Oncology, Sun Yat-sen University Cancer Centre, Guangzhou, China
| | - Songran Liu
- Department of Pathology, Sun Yat-sen University Cancer Centre, Guangzhou, China
| | - Chen Chen
- Department of Radiation Oncology, Sun Yat-sen University Cancer Centre, Guangzhou, China
| | - Zilu Huang
- Department of Radiation Oncology, Sun Yat-sen University Cancer Centre, Guangzhou, China
| | - Shuohan Zheng
- Department of Radiation Oncology, Sun Yat-sen University Cancer Centre, Guangzhou, China
| | - Yujun Hu
- Department of Radiation Oncology, Sun Yat-sen University Cancer Centre, Guangzhou, China
| | - Larry Ka-Yue Chow
- Department of Clinical Oncology, University of Hong Kong, Hong Kong (SAR), China
| | - Yinghong Wei
- Department of Radiation Oncology, Sun Yat-sen University Cancer Centre, Guangzhou, China
| | - Ping Feng
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China; Department of Radiation Oncology, Sun Yat-sen University Cancer Centre, Guangzhou, China
| | - Wei Dai
- Department of Clinical Oncology, University of Hong Kong, Hong Kong (SAR), China
| | - Xin Wang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China; Department of Liver Surgery, Sun Yat-sen University Cancer Centre, Guangzhou, China.
| | - Yunfei Xia
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou, China; Department of Radiation Oncology, Sun Yat-sen University Cancer Centre, Guangzhou, China.
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26
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Zhou W, Xu Y, Zhang J, Zhang P, Yao Z, Yan Z, Wang H, Chu J, Yao S, Zhao S, Yang S, Guo Y, Miao J, Liu K, Chan WC, Xia Q, Liu Y. MiRNA-363-3p/DUSP10/JNK axis mediates chemoresistance by enhancing DNA damage repair in diffuse large B-cell lymphoma. Leukemia 2022; 36:1861-1869. [PMID: 35488020 PMCID: PMC9252898 DOI: 10.1038/s41375-022-01565-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 03/25/2022] [Accepted: 03/31/2022] [Indexed: 12/11/2022]
Abstract
Anthracycline-based chemotherapy resistance represents a major challenge in diffuse large B-cell lymphoma (DLBCL). MiRNA and gene expression profiles (n = 47) were determined to uncover potential chemoresistance mechanisms and therapeutic approaches. An independent correlation between high expression of miRNA-363-3p and chemoresistance was observed and validated in a larger cohort (n = 106). MiRNA-363-3p was shown to reduce doxorubicin-induced apoptosis and tumor shrinkage in in vitro and in vivo experiments by ectopic expression and CRISPR/Cas9-mediated knockout in DLBCL cell lines. DNA methylation was found to participate in transcriptional regulation of miRNA-363-3p. Further investigation revealed that dual specificity phosphatase 10 (DUSP10) is a target of miRNA-363-3p and its suppression promotes the phosphorylation of c-Jun N-terminal kinase (JNK). The miRNA-363-3p/DUSP10/JNK axis was predominantly associated with negative regulation of homologous recombination (HR) and DNA repair pathways. Ectopic expression of miRNA-363-3p more effectively repaired doxorubicin-induced double-strand break (DSB) while enhancing non-homologous end joining repair and reducing HR repair. Targeting JNK and poly (ADP-ribose) polymerase 1 significantly inhibited doxorubicin-induced DSB repair, increased doxorubicin-induced cell apoptosis and tumor shrinkage, and improved the survival of tumor-bearing mice. In conclusion, the miRNA-363-3p/DUSP10/JNK axis is a novel chemoresistance mechanism in DLBCL that may be reversed by targeted therapy.
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Affiliation(s)
- Wenping Zhou
- Department of Internal Medicine, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, Henan, China.,Department of Lymphoma Research, Henan Cancer Institute, Zhengzhou, Henan, China
| | - Yuanlin Xu
- Department of Internal Medicine, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, Henan, China
| | - Jiuyang Zhang
- Department of Internal Medicine, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, Henan, China
| | - Peipei Zhang
- Department of Internal Medicine, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, Henan, China.,Department of Lymphoma Research, Henan Cancer Institute, Zhengzhou, Henan, China
| | - Zhihua Yao
- Department of Internal Medicine, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, Henan, China
| | - Zheng Yan
- Department of Internal Medicine, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, Henan, China
| | - Haiying Wang
- Department of Internal Medicine, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, Henan, China
| | - Junfeng Chu
- Department of Internal Medicine, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, Henan, China
| | - Shuna Yao
- Department of Internal Medicine, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, Henan, China
| | - Shuang Zhao
- Department of Internal Medicine, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, Henan, China
| | - Shujun Yang
- Department of Internal Medicine, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, Henan, China
| | - Yongjun Guo
- Department of Molecule and Pathology, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, Henan, China
| | - Jinxin Miao
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Kangdong Liu
- China-US (Henan) Hormel Cancer Institute, Zhengzhou, Henan, China
| | - Wing C Chan
- Department of Pathology, City of Hope National Medical Center, Duarte, CA, USA
| | - Qingxin Xia
- Department of Molecule and Pathology, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, Henan, China.
| | - Yanyan Liu
- Department of Internal Medicine, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, Henan, China. .,Department of Lymphoma Research, Henan Cancer Institute, Zhengzhou, Henan, China.
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27
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Shen TH, Stauber J, Xu K, Jacunski A, Paragas N, Callahan M, Banlengchit R, Levitman AD, Desanti De Oliveira B, Beenken A, Grau MS, Mathieu E, Zhang Q, Li Y, Gopal T, Askanase N, Arumugam S, Mohan S, Good PI, Stevens JS, Lin F, Sia SK, Lin CS, D’Agati V, Kiryluk K, Tatonetti NP, Barasch J. Snapshots of nascent RNA reveal cell- and stimulus-specific responses to acute kidney injury. JCI Insight 2022; 7:e146374. [PMID: 35230973 PMCID: PMC8986083 DOI: 10.1172/jci.insight.146374] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The current strategy to detect acute injury of kidney tubular cells relies on changes in serum levels of creatinine. Yet serum creatinine (sCr) is a marker of both functional and pathological processes and does not adequately assay tubular injury. In addition, sCr may require days to reach diagnostic thresholds, yet tubular cells respond with programs of damage and repair within minutes or hours. To detect acute responses to clinically relevant stimuli, we created mice expressing Rosa26-floxed-stop uracil phosphoribosyltransferase (Uprt) and inoculated 4-thiouracil (4-TU) to tag nascent RNA at selected time points. Cre-driven 4-TU-tagged RNA was isolated from intact kidneys and demonstrated that volume depletion and ischemia induced different genetic programs in collecting ducts and intercalated cells. Even lineage-related cell types expressed different genes in response to the 2 stressors. TU tagging also demonstrated the transient nature of the responses. Because we placed Uprt in the ubiquitously active Rosa26 locus, nascent RNAs from many cell types can be tagged in vivo and their roles interrogated under various conditions. In short, 4-TU labeling identifies stimulus-specific, cell-specific, and time-dependent acute responses that are otherwise difficult to detect with other technologies and are entirely obscured when sCr is the sole metric of kidney damage.
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Affiliation(s)
| | | | | | - Alexandra Jacunski
- Department of Biomedical Informatics, Columbia University, New York, New York, USA
| | - Neal Paragas
- Department of Medicine, University of Washington, Seattle, Washington, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | - Sumit Mohan
- Department of Medicine, and
- Department of Epidemiology
| | | | | | | | | | - Chyuan-Sheng Lin
- Department of Pathology and Cell Biology, Columbia University, New York, New York, USA
| | - Vivette D’Agati
- Department of Pathology and Cell Biology, Columbia University, New York, New York, USA
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Wang Q, Zhang L, Qu J, Wu X, Sun X, Ji D, Li Y. DUSP6 inhibits the proliferation of hair follicle stem cells (HFSCs) in vitro. Anim Biotechnol 2022. [PMID: 37524308 DOI: 10.1080/10495398.2021.2016433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
RNA-seq has shown that the DUSP6 and MAPK signaling pathways are associated with the production of high-quality brush hair (type III hair) in Yangtze River Delta white goats. However, there are few reports on the regulatory effects of DUSP6 expression on hair follicle stem cells (HFSCs) and cellular processes, as well as the underlying mechanism. Here, we investigated the effect of DUSP6 level in HFSCs and the molecular mechanism underlying the functional regulation of HFSCs by DUSP6. Overexpression of DUSP6 significantly suppressed the proliferation of HFSCs by inducing cell cycle arrest in the G1 phase and by promoting apoptosis. Transcriptome analysis revealed a total of 217 differentially expressed genes between DUSP6-overexpressing and control HFSCs, of which 33 (15.2%) were upregulated in DUSP6-overexpressing cells. The two pathways with the most significant enrichment of differentially expressed genes were the TNF signaling pathway and cytokine-cytokine receptor interaction pathway, and the significantly enriched terms in the GO enrichment analysis involved cell attachment and cytokines. These results indicate that DUSP6 can function as an inhibitory factor in HFSCs through the induction of cell cycle arrest in the G1 phase and can promote apoptosis by mediating crosstalk among several pathways and cytokines.HighlightsWe constructed DUSP6 overexpression vectors to detect mRNA and protein expression levels related to high-quality brush hair in MAPK signaling pathway.We found that high expression level of DUSP6 can inhibit the proliferation of hair follicle stem cells (HFSCs) and promote cell apoptosis of HFSCs.DUSP6 may be involved in the growth regulation of HFSCs like Other studies in cancer, tumors by regulating the expression of cytokines, changing the transmission of signals between cells, activating or suppressing immune-related pathways.
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Affiliation(s)
- Qiang Wang
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Liuming Zhang
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Jingwen Qu
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Xi Wu
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - XiaoMei Sun
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Dejun Ji
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Yongjun Li
- Key Laboratory for Animal Genetics & Molecular Breeding of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
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Ghabeshi S, Najafi A, Zamani B, Soltani M, Arero AG, Izadi S, Piroozmand A. Evaluation of molecular apoptosis signaling pathways and its correlation with EBV viral load in SLE patients using systems biology approach. Hum Antibodies 2021; 30:37-46. [PMID: 34864653 DOI: 10.3233/hab-211505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Considerable evidence supports that SLE could be related to apoptotic cells and EBV infection. OBJECTIVE The aim of this study was to identify the transcriptional signature of EBV infection in SLE patients for survey of the molecular apoptosis signaling pathways. METHODS The PBMCs gene expression profiles of healthy control and SLE patients were obtained from GEO. Functional annotation and signaling pathway enrichment were carried out using DAVID, KEGG. To validate bioinformatics analysis the changes in genes expression of some of obtained genes, Real time PCR was performed on PBMCs from 28 SLE patients and 18 controls. RESULTS We found that mean viral load was 6013 ± 390.1 copy/μg DNA from PBMCs in all patients. QRT-PCR results showed that the expression of the DUSP1 and LAMP3 genes which had most changes in the logFC among 4 candidate genes, increased significantly in comparison with control. The consistent expression of LMP2 as viral latency gene involve in apoptosis signaling pathways was detected in SLE patients with EBV viral load and some controls. CONCLUSIONS The study indicated that some cellular genes may have an important role in pathogenesis of SLE through apoptosis signaling pathways. Beside, EBV infection as an environmental risk factor for SLE may affect the dysfunction of apoptosis.
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Affiliation(s)
- Soad Ghabeshi
- Virology Department, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Najafi
- Molecular Biology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Batol Zamani
- Autoimmune Diseases Research Center, Kashan University of Medical Sciences, Kashan, Iran
| | - Mozhdeh Soltani
- Virology Department, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Amanuel Godana Arero
- Students' Scientific Research Center (SSRC), Tehran University of Medical Sciences, Tehran, Iran.,Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Shima Izadi
- Virology Department, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Ahmad Piroozmand
- Department of Microbiology, School of Medicine, Kashan University of Medical Sciences, Kashan, Iran
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30
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Elhassan RM, Hou X, Fang H. Recent advances in the development of allosteric protein tyrosine phosphatase inhibitors for drug discovery. Med Res Rev 2021; 42:1064-1110. [PMID: 34791703 DOI: 10.1002/med.21871] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 09/26/2021] [Accepted: 10/24/2021] [Indexed: 01/07/2023]
Abstract
Protein tyrosine phosphatases (PTPs) superfamily catalyzes tyrosine de-phosphorylation which affects a myriad of cellular processes. Imbalance in signal pathways mediated by PTPs has been associated with development of many human diseases including cancer, metabolic, and immunological diseases. Several compelling evidence suggest that many members of PTP family are novel therapeutic targets. However, the clinical development of conventional PTP-based active-site inhibitors originally was hampered by the poor selectivity and pharmacokinetic properties. In this regard, PTPs has been widely dismissed as "undruggable." Nonetheless, allosteric modulation has become increasingly an influential and alternative approach that can be exploited for drug development against PTPs. Unlike active-site inhibitors, allosteric inhibitors exhibit a remarkable target-selectivity, drug-likeness, potency, and in vivo activity. Intriguingly, there has been a high interest in novel allosteric PTPs inhibitors within the last years. In this review, we focus on the recent advances of allosteric inhibitors that have been explored in drug discovery and have shown an excellent result in the development of PTPs-based therapeutics. A special emphasis is placed on the structure-activity relationship and molecular mechanistic studies illustrating applications in chemical biology and medicinal chemistry.
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Affiliation(s)
- Reham M Elhassan
- Department of Medicinal Chemistry and Key Laboratory of Chemical Biology of Natural Products (MOE), School of Pharmacy, Shandong University, Jinan, Shandong, China
| | - Xuben Hou
- Department of Medicinal Chemistry and Key Laboratory of Chemical Biology of Natural Products (MOE), School of Pharmacy, Shandong University, Jinan, Shandong, China
| | - Hao Fang
- Department of Medicinal Chemistry and Key Laboratory of Chemical Biology of Natural Products (MOE), School of Pharmacy, Shandong University, Jinan, Shandong, China
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Kim HS, Kang YH, Lee J, Han SR, Kim DB, Ko H, Park S, Lee MS. Biphasic Regulation of Mitogen-Activated Protein Kinase Phosphatase 3 in Hypoxic Colon Cancer Cells. Mol Cells 2021; 44:710-722. [PMID: 34711689 PMCID: PMC8560588 DOI: 10.14348/molcells.2021.0093] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 08/20/2021] [Accepted: 08/20/2021] [Indexed: 01/07/2023] Open
Abstract
Hypoxia, or low oxygen tension, is a hallmark of the tumor microenvironment. The hypoxia-inducible factor-1α (HIF-1α) subunit plays a critical role in the adaptive cellular response of hypoxic tumor cells to low oxygen tension by activating gene-expression programs that control cancer cell metabolism, angiogenesis, and therapy resistance. Phosphorylation is involved in the stabilization and regulation of HIF-1α transcriptional activity. HIF-1α is activated by several factors, including the mitogen-activated protein kinase (MAPK) superfamily. MAPK phosphatase 3 (MKP-3) is a cytoplasmic dual-specificity phosphatase specific for extracellular signal-regulated kinase 1/2 (Erk1/2). Recent evidence indicates that hypoxia increases the endogenous levels of both MKP-3 mRNA and protein. However, its role in the response of cells to hypoxia is poorly understood. Herein, we demonstrated that small-interfering RNA (siRNA)-mediated knockdown of MKP-3 enhanced HIF-1α (not HIF-2α) levels. Conversely, MKP-3 overexpression suppressed HIF-1α (not HIF-2α) levels, as well as the expression levels of hypoxia-responsive genes (LDHA, CA9, GLUT-1, and VEGF), in hypoxic colon cancer cells. These findings indicated that MKP-3, induced by HIF-1α in hypoxia, negatively regulates HIF-1α protein levels and hypoxia-responsive genes. However, we also found that long-term hypoxia (>12 h) induced proteasomal degradation of MKP-3 in a lactic acid-dependent manner. Taken together, MKP-3 expression is modulated by the hypoxic conditions prevailing in colon cancer, and plays a role in cellular adaptation to tumor hypoxia and tumor progression. Thus, MKP-3 may serve as a potential therapeutic target for colon cancer treatment.
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Affiliation(s)
- Hong Seok Kim
- Department of Molecular Medicine, College of Medicine, Inha University, Incheon 22212, Korea
| | - Yun Hee Kang
- Eulji Biomedical Science Research Institute, Eulji University School of Medicine, Daejeon 34824, Korea
- Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon 34824, Korea
| | - Jisu Lee
- Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon 34824, Korea
| | - Seung Ro Han
- Eulji Biomedical Science Research Institute, Eulji University School of Medicine, Daejeon 34824, Korea
- Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon 34824, Korea
| | - Da Bin Kim
- Department of Molecular Medicine, College of Medicine, Inha University, Incheon 22212, Korea
- Program in Biomedical Science and Engineering, College of Medicine, Inha University, Incheon 22212, Korea
| | - Haeun Ko
- Medical Course, College of Medicine, Inha University, Incheon 22212, Korea
| | - Seyoun Park
- Medical Course, College of Medicine, Inha University, Incheon 22212, Korea
| | - Myung-Shin Lee
- Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon 34824, Korea
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Khoubai FZ, Grosset CF. DUSP9, a Dual-Specificity Phosphatase with a Key Role in Cell Biology and Human Diseases. Int J Mol Sci 2021; 22:ijms222111538. [PMID: 34768967 PMCID: PMC8583968 DOI: 10.3390/ijms222111538] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/21/2021] [Accepted: 10/22/2021] [Indexed: 12/14/2022] Open
Abstract
Mitogen-activated protein kinases (MAPKs) are essential for proper cell functioning as they regulate many molecular effectors. Careful regulation of MAPKs is therefore required to avoid MAPK pathway dysfunctions and pathologies. The mammalian genome encodes about 200 phosphatases, many of which dephosphorylate the MAPKs and bring them back to an inactive state. In this review, we focus on the normal and pathological functions of dual-specificity phosphatase 9 (DUSP9)/MAP kinase phosphatases-4 (MKP-4). This cytoplasmic phosphatase, which belongs to the threonine/tyrosine dual-specific phosphatase family and was first described in 1997, is known to dephosphorylate ERK1/2, p38, JNK and ASK1, and thereby to control various MAPK pathway cascades. As a consequence, DUSP9 plays a major role in human pathologies and more specifically in cardiac dysfunction, liver metabolic syndromes, diabetes, obesity and cancer including drug response and cell stemness. Here, we recapitulate the mechanism of action of DUSP9 in the cell, its levels of regulation and its roles in the most frequent human diseases, and discuss its potential as a therapeutic target.
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Kumar GS, Page R, Peti W. 1H, 15N and 13C sequence specific backbone assignment of the MAP kinase binding domain of the dual specificity phosphatase 1 and its interaction with the MAPK p38. BIOMOLECULAR NMR ASSIGNMENTS 2021; 15:243-248. [PMID: 34101142 DOI: 10.1007/s12104-021-10012-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 02/24/2021] [Indexed: 06/12/2023]
Abstract
The sequence-specific backbone assignment of the mitogen-activated protein kinase (MAPK) binding domain of the dual-specificity phosphatase 1 (DUSP1) has been accomplished using a uniformly [13C, 15N]-labeled protein. These assignments will facilitate further studies of DUSP1 in the presence of inhibitors/ligands to target MAPK associated diseases and provide further insights into the function of dual-specificity phosphatase 1 in MAPK regulation.
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Affiliation(s)
- Ganesan Senthil Kumar
- Department of Molecular Biology and Biophysics, University of Connecticut Health Center, Farmington, CT, USA.
- Integrative Structural Biology Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, 110067, India.
| | - Rebecca Page
- Department of Cell Biology, University of Connecticut Health Center, Farmington, CT, USA
| | - Wolfgang Peti
- Department of Molecular Biology and Biophysics, University of Connecticut Health Center, Farmington, CT, USA
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Shao LL, Gao MM, Gong JX, Yang LY. DUSP1 regulates hippocampal damage in epilepsy rats via ERK1/2 pathway. J Chem Neuroanat 2021; 118:102032. [PMID: 34562585 DOI: 10.1016/j.jchemneu.2021.102032] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 09/03/2021] [Accepted: 09/19/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVE To investigate the effects of DUSP1 on the hippocampal injury of young rats with epilepsy (EP) through mediating ERK1/2 signaling pathway. METHODS Young SD rats were selected and divided into Control, EP, EP + LV-GFP, EP + LV-DUSP1, EP + LV-siDUSP1, and EP + LV-siDUSP1 + U0126 groups. Morris Water Maze Test was used to detect the spatial learning and memory. Nissl staining and TUNEL staining were conducted and the inflammatory factors and oxidative stress-related indicators were also measured. Western blotting was utilized to detect the expression of DUSP1 and ERK1/2 pathway. EP cell model was constructed in vitro to verify the in vivo results. RESULTS Compared with Control group, young rats in EP group had decreased spatial learning and memory abilities and increased apoptotic rate and decreased number of Nissl positive cells. Besides, the up-regulated levels in inflammatory factors (IL-1β, IL-6), MDA content, and p-ERK1/2/ERK1/2 protein expression, as well as the down-regulated levels in DUSP1 protein expression and SOD content were also observed in EP rats. The EP rats treated with LV-DUSP1 showed obvious improvements regarding the above indicators, while those treated with LV-siDUSP1 had aggravated injury. But the effect of LV-siDUSP1 can be reversed by the treatment with ERK1/2 pathway inhibitor U0126. Further in vitro investigation verified the in vivo results. CONCLUSION DUSP1 may ameliorate the oxidative stress and inflammatory injury, as well as improve spatial learning and memory abilities via inhibiting ERK1/2 pathway, eventually playing protective roles in hippocampal injury of young rats with EP.
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Affiliation(s)
- Li-Li Shao
- Department of Pediatric, Cangzhou Central Hospital, Cangzhou 061000, PR China.
| | - Miao-Miao Gao
- Department of Pediatric, Cangzhou Central Hospital, Cangzhou 061000, PR China
| | - Jing-Xin Gong
- Department of Pediatric, Cangzhou Central Hospital, Cangzhou 061000, PR China
| | - Li-Yong Yang
- Department of Diagnostic CT, Cangzhou Central Hospital Yanshan Branch, Cangzhou 061399, PR China
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Zhang HJ, Liao HY, Bai DY, Wang ZQ, Xie XW. MAPK /ERK signaling pathway: A potential target for the treatment of intervertebral disc degeneration. Biomed Pharmacother 2021; 143:112170. [PMID: 34536759 DOI: 10.1016/j.biopha.2021.112170] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 09/01/2021] [Accepted: 09/05/2021] [Indexed: 12/17/2022] Open
Abstract
Intervertebral disc degeneration (IDD) is a chronic skeletal muscle degenerative disease, which is considered the main cause of low back pain. It seriously affects the quality of life of patients and consequently brings a heavy economic burden to their families and the society. Although IDD is considered a natural process in degenerative lesions, it is mainly caused by aging, trauma, genetic susceptibility and other factors. It is closely related to changes in the tissue structure and function, including the progressive destruction of extracellular matrix, cell aging, cell death of the intervertebral disc (IVD), inflammation, and impairment of tissue biomechanical function. Currently, the treatment of IDD is aimed at alleviating symptoms rather than at targeting pathological changes in the IVD. Furthermore, the mitogen-activated protein kinase (MAPK)/extracellular signal-regulated kinase (ERK) signaling pathway is closely related to various pathological processes in IDD, and the activation of the MAPK/ERK pathway promotes the degradation of the IVD extracellular matrix, cell aging, apoptosis, and inflammatory responses. It also induces autophagy and oxidative stress that accelerate the IVD process. In our current review, we summarize the latest developments in the negative regulation of IDD after activation of the MAPK/ERK signaling pathway and emphasize on its influence on IDD. Targeting this pathway may become an attractive treatment strategy for IDD in the near future.
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Affiliation(s)
- Hai-Jun Zhang
- Second Provincial People's Hospital of Gansu, 1 Hezheng West Street, Lanzhou 730000, PR China; Affiliated Hospital of Northwest Minzu Univsity, Lanzhou 730000, PR China
| | - Hai-Yang Liao
- Fist Affiliated Hospital of Ganan Medical University, 23 Qingnian Road, Ganzhou 342800, PR China
| | - Deng-Yan Bai
- Second Provincial People's Hospital of Gansu, 1 Hezheng West Street, Lanzhou 730000, PR China; Affiliated Hospital of Northwest Minzu Univsity, Lanzhou 730000, PR China
| | - Zhi-Qiang Wang
- Fist Affiliated Hospital of Ganan Medical University, 23 Qingnian Road, Ganzhou 342800, PR China
| | - Xing-Wen Xie
- Second Provincial People's Hospital of Gansu, 1 Hezheng West Street, Lanzhou 730000, PR China; Affiliated Hospital of Northwest Minzu Univsity, Lanzhou 730000, PR China.
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Su H, Jiang M, Senevirathne C, Aluri S, Zhang T, Guo H, Xavier-Ferrucio J, Jin S, Tran NT, Liu SM, Sun CW, Zhu Y, Zhao Q, Chen Y, Cable L, Shen Y, Liu J, Qu CK, Han X, Klug CA, Bhatia R, Chen Y, Nimer SD, Zheng YG, Iancu-Rubin C, Jin J, Deng H, Krause DS, Xiang J, Verma A, Luo M, Zhao X. Methylation of dual-specificity phosphatase 4 controls cell differentiation. Cell Rep 2021; 36:109421. [PMID: 34320342 PMCID: PMC9110119 DOI: 10.1016/j.celrep.2021.109421] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 02/17/2021] [Accepted: 06/28/2021] [Indexed: 12/11/2022] Open
Abstract
Mitogen-activated protein kinases (MAPKs) are inactivated by dual-specificity phosphatases (DUSPs), the activities of which are tightly regulated during cell differentiation. Using knockdown screening and single-cell transcriptional analysis, we demonstrate that DUSP4 is the phosphatase that specifically inactivates p38 kinase to promote megakaryocyte (Mk) differentiation. Mechanistically, PRMT1-mediated methylation of DUSP4 triggers its ubiquitinylation by an E3 ligase HUWE1. Interestingly, the mechanistic axis of the DUSP4 degradation and p38 activation is also associated with a transcriptional signature of immune activation in Mk cells. In the context of thrombocytopenia observed in myelodysplastic syndrome (MDS), we demonstrate that high levels of p38 MAPK and PRMT1 are associated with low platelet counts and adverse prognosis, while pharmacological inhibition of p38 MAPK or PRMT1 stimulates megakaryopoiesis. These findings provide mechanistic insights into the role of the PRMT1-DUSP4-p38 axis on Mk differentiation and present a strategy for treatment of thrombocytopenia associated with MDS.
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Affiliation(s)
- Hairui Su
- Department of Biochemistry and Molecular Genetics, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Ming Jiang
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10021, USA; Program of Pharmacology, Weill Cornell Medical College of Cornell University, New York, NY 10021, USA
| | - Chamara Senevirathne
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10021, USA
| | - Srinivas Aluri
- Department of Oncology, Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, NY 10461, USA
| | - Tuo Zhang
- Genomics and Epigenomics Core Facility, Weill Cornell Medical College of Cornell University, New York, NY 10021, USA
| | - Han Guo
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10021, USA; Tri-Institutional PhD Program in Chemical Biology, Memorial Sloan Kettering Cancer Center, New York, NY 10021, USA
| | - Juliana Xavier-Ferrucio
- Department of Laboratory Medicine, Yale Stem Cell Center, Yale School of Medicine, New Haven, CT 06520, USA
| | - Shuiling Jin
- Department of Biochemistry and Molecular Genetics, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Ngoc-Tung Tran
- Department of Biochemistry and Molecular Genetics, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Szu-Mam Liu
- Department of Biochemistry and Molecular Genetics, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Chiao-Wang Sun
- Department of Biochemistry and Molecular Genetics, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Yongxia Zhu
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10021, USA
| | - Qing Zhao
- Department of Medicine, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Yuling Chen
- Department of School of Life Sciences, Tsinghua University, Beijing 100084, China
| | | | - Yudao Shen
- Mount Sinai Center for Therapeutics Discovery, Departments of Pharmacological Sciences and Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Jing Liu
- Mount Sinai Center for Therapeutics Discovery, Departments of Pharmacological Sciences and Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Cheng-Kui Qu
- Aflac Cancer and Blood Disorders Center, Winship Cancer Institute, Emory University, Atlanta, GA 30322, USA
| | - Xiaosi Han
- Department of Neurology, School of Medicine, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Christopher A Klug
- Department of Microbiology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Ravi Bhatia
- Division of Hematology and Oncology, School of Medicine, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Yabing Chen
- Department of Pathology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Veterans Affairs Birmingham Medical Center, Research Department, Birmingham, AL 35294, USA
| | - Stephen D Nimer
- Sylvester Comprehensive Cancer Center, University of Miami, Miami, FL 33146 USA
| | - Y George Zheng
- Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy, University of Georgia, Athens, GA 30602, USA
| | - Camelia Iancu-Rubin
- Department of Medicine, Hematology and Oncology Division, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Jian Jin
- Mount Sinai Center for Therapeutics Discovery, Departments of Pharmacological Sciences and Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Haiteng Deng
- Department of School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Diane S Krause
- Department of Laboratory Medicine, Yale Stem Cell Center, Yale School of Medicine, New Haven, CT 06520, USA
| | - Jenny Xiang
- Genomics and Epigenomics Core Facility, Weill Cornell Medical College of Cornell University, New York, NY 10021, USA
| | - Amit Verma
- Department of Oncology, Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, NY 10461, USA.
| | - Minkui Luo
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10021, USA; Program of Pharmacology, Weill Cornell Medical College of Cornell University, New York, NY 10021, USA.
| | - Xinyang Zhao
- Department of Biochemistry and Molecular Genetics, The University of Alabama at Birmingham, Birmingham, AL 35294, USA.
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Fan MK, Zhang GC, Chen W, Qi LL, Xie MF, Zhang YY, Wang L, Zhang Q. Siglec-15 Promotes Tumor Progression in Osteosarcoma via DUSP1/MAPK Pathway. Front Oncol 2021; 11:710689. [PMID: 34336699 PMCID: PMC8322944 DOI: 10.3389/fonc.2021.710689] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 07/01/2021] [Indexed: 12/30/2022] Open
Abstract
Recurrence and metastasis are important features of osteosarcoma (OS) that cause its poor prognosis. Aberrant expression of Sialic acid-binding immunoglobulin-like lectin 15 (Siglec-15) has been reported in various kinds of cancers. However, the expression and function of Siglec-15 in OS remain unclear. In cultured OS cells (143B cells and MNNG/HOS cells) and their xenograft mouse models, we found that downregulation of Siglec-15 could inhibit the proliferation, migration and invasion of by inducing epithelial-mesenchymal transition (EMT) in vitro and in vivo. Conversely, Siglec-15 overexpression promoted the growth, migration and invasion of OS cells in a significant manner. Then, we screened a number of differentially expressed genes (DEGs) between Siglec-15-knockdown group and control group by RNA-Seq assay. Among these DEGs, we found that dual-specificity phosphatase 1 (DUSP1/MKP1) was significantly downregulated after Siglec-15 silencing. We investigated the DUSP1 functions in influencing OS cells’ biology, and found that the proliferation, migration and invasion of OS cells were promoted by overexpressing DUSP1 and crucially, the proliferation, migration and invasion of Siglec-15-knockdown OS cells were rescued by overexpressing DUSP1. Mechanically, we further showed that DUSP1-mediated inhibition of p38/MAPK and JNK/MAPK expression was attenuated when Siglec-15 expression was inhibited, suggesting that Siglec-15 promotes the malignant progression of OS cells by suppressing DUSP1-mediated suppression of the MAPK pathway. Moreover, we showed that both Siglec-15 and DUSP1 were highly expressed in human OS tissues by immunohistochemistry. High Siglec-15 expression was associated with OS lung metastasis, and high DUSP1 expression was associated with the high Enneking stage. Kaplan–Meier analysis indicated that high expression of Siglec-15 could predict poor prognosis of OS patients. Altogether, these results showed that Siglec-15 expression promoted OS development and progression by activating DUSP1 and might be a novel target in OS treatment.
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Affiliation(s)
- Meng-Ke Fan
- Department of Orthopedic Research Center, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Guo-Chuan Zhang
- Department of Orthopedic Oncology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Wei Chen
- Department of Orthopaedic Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Li-Li Qi
- Department of Pathogenic Biology, Hebei Medical University, Shijiazhuang, China
| | - Ming-Fang Xie
- Department of Orthopedic Oncology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Yue-Yao Zhang
- Department of Orthopedic Research Center, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Ling Wang
- Department of Orthopedic Research Center, The Third Hospital of Hebei Medical University, Shijiazhuang, China.,Department of Orthopedic Oncology, The Third Hospital of Hebei Medical University, Shijiazhuang, China
| | - Qi Zhang
- Department of Orthopedic Research Center, The Third Hospital of Hebei Medical University, Shijiazhuang, China
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Varela T, Conceição N, Laizé V, Cancela ML. Transcriptional regulation of human DUSP4 gene by cancer-related transcription factors. J Cell Biochem 2021; 122:1556-1566. [PMID: 34254709 DOI: 10.1002/jcb.30078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 06/23/2021] [Accepted: 06/25/2021] [Indexed: 11/11/2022]
Abstract
Dual specificity phosphatase 4 (DUSP4), a member of the dual specificity phosphatase family, is responsible for the dephosphorylation and inactivation of ERK, JNK and p38, which are mitogen-activated protein kinases involved in cell proliferation, differentiation and apoptosis, but also in inflammation processes. Given its importance for cellular signalling, DUSP4 is subjected to a tight regulation and there is growing evidence that its expression is dysregulated in several tumours. However, the mechanisms underlying DUSP4 transcriptional regulation remain poorly understood. Here, we analysed the regulation of the human DUSP4 promoters 1 and 2, located upstream of exons 1 and 2, respectively, by the cancer-related transcription factors (TFs) STAT3, FOXA1, CTCF and YY1. The presence of binding sites for these TFs was predicted in both promoters through the in silico analysis of DUSP4, and their functionality was assessed through luciferase activity assays. Regulatory activity of the TFs tested was found to be promoter-specific. While CTCF stimulated the activity of promoter 2 that controls the transcription of variants 2 and X1, STAT3 stimulated the activity of promoter 1 that controls the transcription of variant 1. YY1 positively regulated both promoters, although to different extents. Through site-directed mutagenesis, the functionality of YY1 binding sites present in promoter 2 was confirmed. This study provides novel insights into the transcriptional regulation of DUSP4, contributing to a better comprehension of the mechanisms of its dysregulation observed in several types of cancer.
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Affiliation(s)
- Tatiana Varela
- Centre of Marine Sciences, University of Algarve, Faro, Portugal.,Faculty of Medicine and Biomedical Sciences, University of Algarve, Faro, Portugal
| | - Natércia Conceição
- Centre of Marine Sciences, University of Algarve, Faro, Portugal.,Faculty of Medicine and Biomedical Sciences, University of Algarve, Faro, Portugal.,Algarve Biomedical Center, University of Algarve, Faro, Portugal
| | - Vincent Laizé
- Centre of Marine Sciences, University of Algarve, Faro, Portugal
| | - M Leonor Cancela
- Centre of Marine Sciences, University of Algarve, Faro, Portugal.,Algarve Biomedical Center, University of Algarve, Faro, Portugal
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Wan Mohd Tajuddin WNB, Abas F, Othman I, Naidu R. Molecular Mechanisms of Antiproliferative and Apoptosis Activity by 1,5-Bis(4-Hydroxy-3-Methoxyphenyl)1,4-Pentadiene-3-one (MS13) on Human Non-Small Cell Lung Cancer Cells. Int J Mol Sci 2021; 22:ijms22147424. [PMID: 34299042 PMCID: PMC8307969 DOI: 10.3390/ijms22147424] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 06/30/2021] [Accepted: 07/04/2021] [Indexed: 01/12/2023] Open
Abstract
Diarylpentanoid (DAP), an analog that was structurally modified from a naturally occurring curcumin, has shown to enhance anticancer efficacy compared to its parent compound in various cancers. This study aims to determine the cytotoxicity, antiproliferative, and apoptotic activity of diarylpentanoid MS13 on two subtypes of non-small cell lung cancer (NSCLC) cells: squamous cell carcinoma (NCI-H520) and adenocarcinoma (NCI-H23). Gene expression analysis was performed using Nanostring PanCancer Pathways Panel to determine significant signaling pathways and targeted genes in these treated cells. Cytotoxicity screening revealed that MS13 exhibited greater inhibitory effect in NCI-H520 and NCI-H23 cells compared to curcumin. MS13 induced anti-proliferative activity in both cells in a dose- and time-dependent manner. Morphological analysis revealed that a significant number of MS13-treated cells exhibited apoptosis. A significant increase in caspase-3 activity and decrease in Bcl-2 protein concentration was noted in both MS13-treated cells in a time- and dose-dependent manner. A total of 77 and 47 differential expressed genes (DEGs) were regulated in MS13 treated-NCI-H520 and NCI-H23 cells, respectively. Among the DEGs, 22 were mutually expressed in both NCI-H520 and NCI-H23 cells in response to MS13 treatment. The top DEGs modulated by MS13 in NCI-H520—DUSP4, CDKN1A, GADD45G, NGFR, and EPHA2—and NCI-H23 cells—HGF, MET, COL5A2, MCM7, and GNG4—were highly associated with PI3K, cell cycle-apoptosis, and MAPK signaling pathways. In conclusion, MS13 may induce antiproliferation and apoptosis activity in squamous cell carcinoma and adenocarcinoma of NSCLC cells by modulating DEGs associated with PI3K-AKT, cell cycle-apoptosis, and MAPK pathways. Therefore, our present findings could provide an insight into the anticancer activity of MS13 and merits further investigation as a potential anticancer agent for NSCLC cancer therapy.
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Affiliation(s)
- Wan Nur Baitty Wan Mohd Tajuddin
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway 47500, Selangor Darul Ehsan, Malaysia; (W.N.B.W.M.T.); (I.O.)
| | - Faridah Abas
- Laboratory of Natural Products, Faculty of Science, Universiti Putra Malaysia, UPM, Serdang 43400, Malaysia;
- Department of Food Science, Faculty of Food Science and Technology, Universiti Putra Malaysia, UPM, Serdang 43400, Malaysia
| | - Iekhsan Othman
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway 47500, Selangor Darul Ehsan, Malaysia; (W.N.B.W.M.T.); (I.O.)
- Global Asia in the 21s Century Platform, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway 47500, Selangor Darul Ehsan, Malaysia
| | - Rakesh Naidu
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway 47500, Selangor Darul Ehsan, Malaysia; (W.N.B.W.M.T.); (I.O.)
- Global Asia in the 21s Century Platform, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway 47500, Selangor Darul Ehsan, Malaysia
- Correspondence: ; Tel.: +60-3-5514-63-45
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Chen K, Gorgen A, Ding A, Du L, Jiang K, Ding Y, Sapisochin G, Ghanekar A. Dual-Specificity Phosphatase 9 Regulates Cellular Proliferation and Predicts Recurrence After Surgery in Hepatocellular Carcinoma. Hepatol Commun 2021; 5:1310-1328. [PMID: 34278178 PMCID: PMC8279460 DOI: 10.1002/hep4.1701] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 01/19/2021] [Accepted: 02/07/2021] [Indexed: 12/13/2022] Open
Abstract
Hepatocellular carcinoma (CC) is a common and deadly cancer with complex molecular pathogenesis. Little is known about dual-specificity phosphatases (DUSPs) in HCC. We investigated DUSP9 expression in human HCC, associations between DUSP9 and patient outcomes, and effects of altered DUSP9 expression on HCC biology. We studied public data sets as well as 196 patients at our institution who had HCC resections. Quantitative real-time reverse transcription polymerase chain reaction and western blot demonstrated that DUSP9 expression was increased >10-fold in HCC compared to adjacent liver and healthy controls (P = 0.005). Kaplan-Meier and multivariable regression analyses revealed that higher DUSP9 expression was associated with shorter disease-free survival (high DUSP9, 1.6; 95% confidence interval, 0.9-2.3 vs. low DUSP9, 3.4; 95% confidence interval, 1.8-5.0 years; P = 0.04) and increased risk of recurrence (hazard ratio 1.55; 95% confidence interval, 1.01-2.67; P = 0.05) after resection. DUSP9 complementary DNA (cDNA) was cloned using rapid amplification of cDNA ends, revealing two DUSP9 isoforms in human HCC cells. Studies of transcriptional regulation using promoter-luciferase reporter constructs suggested that DUSP9 transcription is regulated by E26 transformation-specific transcription factors. Proliferation of hepatic cells in vitro was enhanced by lentiviral-mediated overexpression of DUSP9. In contrast, DUSP9 knockout HCC cells generated using clustered regularly interspaced short palindromic repeats (CRISPR) demonstrated decreased HCC proliferation and doxorubicin resistance in vitro and impaired xenograft growth in vivo. RNA sequencing, gene set enrichment, and network/pathway analysis revealed that DUSP9 knockout is associated with activation of protein kinase activity and apoptosis. Conclusion: DUSP9 regulates cell proliferation and predicts recurrence after surgery in HCC. DUSP9 may represent a novel prognostic candidate and therapeutic target. Additional studies are warranted to further explore the role and regulation of DUSP9 in HCC.
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Affiliation(s)
- Kui Chen
- Toronto General Hospital Research InstituteUniversity Health NetworkTorontoONCanada
| | - Andre Gorgen
- Division of General SurgeryUniversity Health NetworkTorontoONCanada
- Department of SurgeryUniversity of TorontoTorontoONCanada
| | - Avrilynn Ding
- Toronto General Hospital Research InstituteUniversity Health NetworkTorontoONCanada
| | - Lulu Du
- Toronto General Hospital Research InstituteUniversity Health NetworkTorontoONCanada
| | - Keruo Jiang
- Toronto General Hospital Research InstituteUniversity Health NetworkTorontoONCanada
| | - Yu Ding
- Toronto General Hospital Research InstituteUniversity Health NetworkTorontoONCanada
| | - Gonzalo Sapisochin
- Division of General SurgeryUniversity Health NetworkTorontoONCanada
- Department of SurgeryUniversity of TorontoTorontoONCanada
| | - Anand Ghanekar
- Toronto General Hospital Research InstituteUniversity Health NetworkTorontoONCanada
- Division of General SurgeryUniversity Health NetworkTorontoONCanada
- Department of SurgeryUniversity of TorontoTorontoONCanada
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Li Z, Zhang L, Liu FY, Li P, He J, Kirkwood CL, Sohn J, Chan JM, Magner WJ, Kirkwood KL. MKP-1 is required to limit myeloid-cell mediated oral squamous cell carcinoma progression and regional extension. Oral Oncol 2021; 120:105401. [PMID: 34182221 DOI: 10.1016/j.oraloncology.2021.105401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 05/07/2021] [Accepted: 06/15/2021] [Indexed: 10/21/2022]
Abstract
Mitogen-activated protein kinases (MAPKs) require MAPK phosphatases (MKPs) for deactivation of MAPK intracellular signaling. MKP-1 (encoded by Dusp1) is a key negative regulator of MAPKs and prior reports have indicated that MKP-1 regulates oral cancer-associated inflammation and leukocyte infiltration. OBJECTIVE To determine the significance of myeloid-based expression of MKP-1 in oral cancer. METHODS The Cancer Genome Atlas (TCGA) was used to address DUSP1 expression in oral squamous cell carcinoma (OSCC). Syngeneic and carcinogen-induced mouse models using global and myeloid-specific Dusp-1 deficient mice with immunophenotypic, histologic, and transcriptomic analyses and in vitro migration assays. RESULTS Data from TCGA indicates the DUSP1 expression is inversely related to oral cancer burden and nodal involvement. Using murine models of OSCC, the role of MKP-1 signaling in tumor associated macrophages (TAMs) was assessed. Dusp1-deficient mice had increased tumor burden and TAM infiltrate with increased M2 macrophage polarization. Transcriptomic signatures of TAMs from Dusp1-deficent mice indicated a pro-metastatic phenotype as well as concomitant differences in myeloid-associated genes, cytokine/chemokine signaling, and Notch signaling consistent with tumor progression. In vitro and in vivo assays revealed mouse OSCC cells had a higher migration rate using TAM cell-free supernatant from Dusp1 deficiency mice compared to controls with enhanced regional cervical lymph node metastasis, respectively. To validate TAM studies using implantable mouse models, an OSCC progression model with conditional myeloid-specific Dusp-1 deficient mice demonstrated enhanced OSCC disease progression, characterized by advanced onset, histological stage, and tumor burden. CONCLUSION Myeloid-based Dusp1-deficiency increases OSCC burden and metastasis through alteration in TAM recruitment, gene profile, and polarity suggesting that MKP-1 could be a viable target to reprogram TAM to limit local/regional OSCC extension.
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Affiliation(s)
- Zhenning Li
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA; Department of Oromaxillofacial-Head and Neck Surgery, School and Hospital of Stomatology, China Medical University, Liaoning Province Key Laboratory of Oral Disease, Shenyang, China; Department of Medical Genetics, China Medical University, Shenyang, China, Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, China
| | - Lixia Zhang
- Department of Medical Genetics, China Medical University, Shenyang, China, Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, China
| | - Fa-Yu Liu
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA; Department of Oromaxillofacial-Head and Neck Surgery, School and Hospital of Stomatology, China Medical University, Liaoning Province Key Laboratory of Oral Disease, Shenyang, China
| | - Peng Li
- Department of Medical Genetics, China Medical University, Shenyang, China, Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, China,; Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
| | - Jing He
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA; Department of Oromaxillofacial-Head and Neck Surgery, School and Hospital of Stomatology, China Medical University, Liaoning Province Key Laboratory of Oral Disease, Shenyang, China
| | - Cameron L Kirkwood
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA
| | - Jiho Sohn
- Department of Medicine, University at Buffalo, Buffalo, NY, USA
| | - Jon M Chan
- Department of Head and Neck/Plastic and Reconstructive Surgery, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - William J Magner
- Department of Head and Neck/Plastic and Reconstructive Surgery, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Keith L Kirkwood
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, Buffalo, NY, USA; Department of Head and Neck/Plastic and Reconstructive Surgery, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA.
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Cáceres P, Barría A, Christensen KA, Bassini LN, Correa K, Garcia B, Lhorente JP, Yáñez JM. Genome-scale comparative analysis for host resistance against sea lice between Atlantic salmon and rainbow trout. Sci Rep 2021; 11:13231. [PMID: 34168167 PMCID: PMC8225872 DOI: 10.1038/s41598-021-92425-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 06/10/2021] [Indexed: 11/08/2022] Open
Abstract
Sea lice (Caligus rogercresseyi) is an ectoparasite which causes major production losses in the salmon aquaculture industry worldwide. Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss) are two of the most susceptible salmonid species to sea lice infestation. The objectives of this study were to: (1) identify genomic regions associated with resistance to Caligus rogercresseyi in Atlantic salmon and rainbow trout by performing single-step Genome-Wide Association studies (ssGWAS), and (2) identify candidate genes related to trait variation based on exploring orthologous genes within the associated regions across species. A total of 2626 Atlantic salmon and 2643 rainbow trout were challenged and genotyped with 50 K and 57 K SNP panels, respectively. We ran two independent ssGWAS for sea lice resistance on each species and identified 7 and 13 regions explaining more than 1% of the genetic variance for the trait, with the most important regions explaining 3% and 2.7% for Atlantic salmon and rainbow trout, respectively. We identified genes associated with immune response, cytoskeleton function, and cell migration when focusing on important genomic regions for each species. Moreover, we found 15 common orthogroups which were present in more than one associated genomic region, within- or between-species; however, only one orthogroup showed a clear potential biological relevance in the response against sea lice. For instance, dual-specificity protein phosphatase 10-like (dusp10) and dual-specificity protein phosphatase 8 (dusp8) were found in genomic regions associated with lice density in Atlantic salmon and rainbow trout, respectively. Dusp10 and dusp8 are modulators of the MAPK pathway and might be involved in the differences of the inflammation response between lice resistant and susceptible fish from both species. Our results provide further knowledge on candidate genes related to sea lice resistance and may help establish better control for sea lice in fish populations.
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Affiliation(s)
- Pablo Cáceres
- Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Av. Santa Rosa 11735, La Pintana, 8820808, Santiago, Chile
| | - Agustín Barría
- The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh Easter Bush, Midlothian, EH25 9RG, UK
| | - Kris A Christensen
- Fisheries and Oceans Canada, 4160 Marine Drive, West Vancouver, BC, Canada
| | - Liane N Bassini
- Escuela de Medicina Veterinaria, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | - Katharina Correa
- Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Av. Santa Rosa 11735, La Pintana, 8820808, Santiago, Chile
| | - Baltasar Garcia
- Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Av. Santa Rosa 11735, La Pintana, 8820808, Santiago, Chile
- School of Agricultural and Veterinary Sciences, UNESP-Sao Paulo State University, Jaboticabal, 14884900, Brazil
| | | | - José M Yáñez
- Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Av. Santa Rosa 11735, La Pintana, 8820808, Santiago, Chile.
- Núcleo Milenio INVASAL, Concepción, Chile.
- Center for Research and Innovation in Aquaculture (CRIA), Universidad de Chile, Santiago, Santiago, Chile.
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Liu X, Liu X, Du Y, Hu M, Tian Y, Li Z, Lv L, Zhang X, Liu Y, Zhou Y, Zhang P. DUSP5 promotes osteogenic differentiation through SCP1/2-dependent phosphorylation of SMAD1. STEM CELLS (DAYTON, OHIO) 2021; 39:1395-1409. [PMID: 34169608 PMCID: PMC8518947 DOI: 10.1002/stem.3428] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 04/27/2021] [Accepted: 05/06/2021] [Indexed: 11/23/2022]
Abstract
Dual‐specificity phosphatases (DUSPs) are defined by their capability to dephosphorylate both phosphoserine/phosphothreonine (pSer/pThr) and phosphotyrosine (pTyr). DUSP5, a member of DUSPs superfamily, is located in the nucleus and plays crucially regulatory roles in the signaling pathway transduction. In our present study, we discover that DUSP5 significantly promotes osteogenic differentiation of mesenchymal stromal cells (MSCs) by activating SMAD1 signaling pathway. Mechanistically, DUSP5 physically interacts with the phosphatase domain of small C‐terminal phosphatase 1/2 (SCP1/2, SMAD1 phosphatases) by the linker region. In addition, we further confirm that DUSP5 activates SMAD1 signaling through a SCP1/2‐dependent manner. Specifically, DUSP5 attenuates the SCP1/2‐SMAD1 interaction by competitively binding to SCP1/2, which is responsible for the SMAD1 dephosphorylation, and thus results in the activation of SMAD1 signaling. Importantly, DUSP5 expression in mouse bone marrow MSCs is significantly reduced in ovariectomized (OVX) mice in which osteogenesis is highly passive, and overexpression of Dusp5 via tail vein injection reverses the bone loss of OVX mice efficiently. Collectively, this work demonstrates that the linker region of DUSP5 maybe a novel chemically modifiable target for controlling MSCs fate choices and for osteoporosis treatment.
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Affiliation(s)
- Xuejiao Liu
- Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China.,National Engineering Lab for Digital and Material Technology of Stomatology, National Clinical Diseases, Peking University School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China
| | - Xuenan Liu
- Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China.,National Engineering Lab for Digital and Material Technology of Stomatology, National Clinical Diseases, Peking University School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China
| | - Yangge Du
- Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China.,National Engineering Lab for Digital and Material Technology of Stomatology, National Clinical Diseases, Peking University School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China
| | - Menglong Hu
- Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China.,National Engineering Lab for Digital and Material Technology of Stomatology, National Clinical Diseases, Peking University School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China
| | - Yueming Tian
- Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China.,National Engineering Lab for Digital and Material Technology of Stomatology, National Clinical Diseases, Peking University School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China
| | - Zheng Li
- Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China.,National Engineering Lab for Digital and Material Technology of Stomatology, National Clinical Diseases, Peking University School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China
| | - Longwei Lv
- Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China.,National Engineering Lab for Digital and Material Technology of Stomatology, National Clinical Diseases, Peking University School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China
| | - Xiao Zhang
- Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China.,National Engineering Lab for Digital and Material Technology of Stomatology, National Clinical Diseases, Peking University School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China
| | - Yunsong Liu
- Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China.,National Engineering Lab for Digital and Material Technology of Stomatology, National Clinical Diseases, Peking University School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China
| | - Yongsheng Zhou
- Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China.,National Engineering Lab for Digital and Material Technology of Stomatology, National Clinical Diseases, Peking University School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China
| | - Ping Zhang
- Department of Prosthodontics, School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China.,National Engineering Lab for Digital and Material Technology of Stomatology, National Clinical Diseases, Peking University School and Hospital of Stomatology, Peking University, Beijing, People's Republic of China
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NR4A1 enhances MKP7 expression to diminish JNK activation induced by ROS or ER-stress in pancreatic β cells for surviving. Cell Death Discov 2021; 7:133. [PMID: 34088892 PMCID: PMC8178316 DOI: 10.1038/s41420-021-00521-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/18/2021] [Accepted: 05/13/2021] [Indexed: 12/03/2022] Open
Abstract
Under adverse conditions, such as sustained or chronic hyperglycemia or hyperlipidemia, ROS (reactive oxygen species) or/and ER-stress (endoplasmic reticulum stress) will be induced in pancreatic β cells. ROS or ER-stress damages β-cells even leads to apoptosis. Previously we found ROS or ER-stress resulted in JNK activation in β cells and overexpressing NR4A1 in MIN6 cells reduced JNK activation via modulating cbl-b expression and subsequent degrading the upstream JNK kinase (MKK4). To search other possible mechanisms, we found the mRNA level and protein level of MKP7 (a phosphatase for phospho-JNK) were dramatic reduced in pancreatic β cells in the islets from NR4A1 KO mice compared with that from wild type mice. To confirm what we found in animals, we applied pancreatic β cells (MIN6 cells) and found that the expression of MKP7 was increased in NR4A1-overexpression MIN6 cells. We further found that knocking down the expression of MKP7 increased the p-JNK level in pancreatic β cells upon treatment with TG or H2O2. After that, we figured out that NR4A1 did enhance the transactivation of the MKP7 promoter by physical association with two putative binding sites. In sum, NR4A1 attenuates JNK phosphorylation incurred by ER-stress or ROS partially via enhancing MKP7 expression, potentially decreases pancreatic β cell apoptosis induced by ROS or ER-stress. Our finding provides a clue for diabetes prevention.
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Hammad A, Zheng ZH, Namani A, Elshaer M, Wang XJ, Tang X. Transcriptome analysis of potential candidate genes and molecular pathways in colitis-associated colorectal cancer of Mkp-1-deficient mice. BMC Cancer 2021; 21:607. [PMID: 34034704 PMCID: PMC8152130 DOI: 10.1186/s12885-021-08200-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 04/13/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND The nuclear phosphatase mitogen-activate protein kinase phosphatase-1 (MKP-1) is a key negative regulator of the innate immune response through the regulation of the biosynthesis of proinflammatory cytokines. In colorectal cancer (CRC), which is induced mainly by chronic inflammation, Mkp-1 overexpression was found in addition to disturbances in Mkp-1 functions, which may play a role in cancer development in different types of tumors. However, the potential molecular mechanisms by which Mkp-1 influences CRC development is not clear. Here, we performed global gene expression profiling of Mkp-1 KO mice using RNA sequencing (RNA-seq) to explore the role of Mkp-1 in CRC progression using transcriptome analysis. METHODS Azoxymethane/dextran sodium sulfate (AOM/DSS) mouse models were used to examine the most dramatic molecular and signaling changes that occur during different phases of CRC development in wild-type mice and Mkp-1 KO mice. Comprehensive bioinformatics analyses were used to elucidate the molecular processes regulated by Mkp-1. Differentially expressed genes (DEGs) were identified and functionally analyzed by Gene Ontology (GO), Kyoto Enrichment of Genes and Genomes (KEGG). Then, protein-protein interaction (PPI) network analysis was conducted using the STRING database and Cytoscape software. RESULTS Persistent DEGs were different in adenoma and carcinoma stage (238 & 251, respectively) and in WT and MKp-1 KO mice (221& 196, respectively). Mkp-1 KO modulated key molecular processes typically activated in cancer, in particular, cell adhesion, ion transport, extracellular matrix organization, response to drug, response to hypoxia, and response to toxic substance. It was obvious that these pathways are closely associated with cancer development and metastasis. From the PPI network analyses, nine hub genes associated with CRC were identified. CONCLUSION These findings suggest that MKp-1 and its hub genes may play a critical role in cancer development, prognosis, and determining treatment outcomes. We provide clues to build a potential link between Mkp-1 and colitis-associated tumorigenesis and identify areas requiring further investigation.
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Affiliation(s)
- Ahmed Hammad
- Department of Biochemistry and Department of Thoracic Surgery of The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, People's Republic of China
| | - Zhao-Hong Zheng
- Department of Pharmacology, Zhejiang University School of Medicine, Zhejiang University, Hangzhou, 310058, People's Republic of China
| | - Akhileshwar Namani
- Department of Biochemistry and Department of Thoracic Surgery of The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, People's Republic of China.,Present address: Department of Biotechnology, Institute of Science, GITAM, Visakhapatnam, 530045, India
| | - Mohamed Elshaer
- Department of Biochemistry and Department of Thoracic Surgery of The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, People's Republic of China
| | - Xiu Jun Wang
- Department of Pharmacology, Zhejiang University School of Medicine, Zhejiang University, Hangzhou, 310058, People's Republic of China
| | - Xiuwen Tang
- Department of Biochemistry and Department of Thoracic Surgery of The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310003, People's Republic of China.
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Jeon J, Lee S, Kim H, Kang H, Youn H, Jo S, Youn B, Kim HY. Revisiting Platinum-Based Anticancer Drugs to Overcome Gliomas. Int J Mol Sci 2021; 22:ijms22105111. [PMID: 34065991 PMCID: PMC8151298 DOI: 10.3390/ijms22105111] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 05/08/2021] [Accepted: 05/10/2021] [Indexed: 12/12/2022] Open
Abstract
Although there are many patients with brain tumors worldwide, there are numerous difficulties in overcoming brain tumors. Among brain tumors, glioblastoma, with a 5-year survival rate of 5.1%, is the most malignant. In addition to surgical operations, chemotherapy and radiotherapy are generally performed, but the patients have very limited options. Temozolomide is the most commonly prescribed drug for patients with glioblastoma. However, it is difficult to completely remove the tumor with this drug alone. Therefore, it is necessary to discuss the potential of anticancer drugs, other than temozolomide, against glioblastomas. Since the discovery of cisplatin, platinum-based drugs have become one of the leading chemotherapeutic drugs. Although many studies have reported the efficacy of platinum-based anticancer drugs against various carcinomas, studies on their effectiveness against brain tumors are insufficient. In this review, we elucidated the anticancer effects and advantages of platinum-based drugs used in brain tumors. In addition, the cases and limitations of the clinical application of platinum-based drugs are summarized. As a solution to overcome these obstacles, we emphasized the potential of a novel approach to increase the effectiveness of platinum-based drugs.
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Affiliation(s)
- Jaewan Jeon
- Department of Radiation Oncology, Haeundae Paik Hospital, Inje University School of Medicine, Busan 48108, Korea; (J.J.); (S.J.)
| | - Sungmin Lee
- Department of Integrated Biological Science, Pusan National University, Busan 46241, Korea; (S.L.); (H.K.); (H.K.)
| | - Hyunwoo Kim
- Department of Integrated Biological Science, Pusan National University, Busan 46241, Korea; (S.L.); (H.K.); (H.K.)
| | - Hyunkoo Kang
- Department of Integrated Biological Science, Pusan National University, Busan 46241, Korea; (S.L.); (H.K.); (H.K.)
| | - HyeSook Youn
- Department of Integrative Bioscience and Biotechnology, Sejong University, Seoul 05006, Korea;
| | - Sunmi Jo
- Department of Radiation Oncology, Haeundae Paik Hospital, Inje University School of Medicine, Busan 48108, Korea; (J.J.); (S.J.)
| | - BuHyun Youn
- Department of Integrated Biological Science, Pusan National University, Busan 46241, Korea; (S.L.); (H.K.); (H.K.)
- Department of Biological Sciences, Pusan National University, Busan 46241, Korea
- Correspondence: (B.Y.); (H.Y.K.); Tel.: +82-51-510-2264 (B.Y.); +82-51-797-3923 (H.Y.K.)
| | - Hae Yu Kim
- Department of Neurosurgery, Haeundae Paik Hospital, Inje University School of Medicine, Busan 48108, Korea
- Correspondence: (B.Y.); (H.Y.K.); Tel.: +82-51-510-2264 (B.Y.); +82-51-797-3923 (H.Y.K.)
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Gao PP, Qi XW, Sun N, Sun YY, Zhang Y, Tan XN, Ding J, Han F, Zhang Y. The emerging roles of dual-specificity phosphatases and their specific characteristics in human cancer. Biochim Biophys Acta Rev Cancer 2021; 1876:188562. [PMID: 33964330 DOI: 10.1016/j.bbcan.2021.188562] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 04/15/2021] [Accepted: 05/02/2021] [Indexed: 12/15/2022]
Abstract
Reversible phosphorylation of proteins, controlled by kinases and phosphatases, is involved in various cellular processes. Dual-specificity phosphatases (DUSPs) can dephosphorylate phosphorylated serine, threonine and tyrosine residues. This family consists of 61 members, 44 of which have been identified in human, and these 44 members are classified into six subgroups, the phosphatase and tensin homolog (PTEN) protein phosphatases (PTENs), mitogen-activated protein kinase phosphatases (MKPs), atypical DUSPs, cell division cycle 14 (CDC14) phosphatases (CDC14s), slingshot protein phosphatases (SSHs), and phosphatases of the regenerating liver (PRLs). Growing evidence has revealed dysregulation of DUSPs as one of the common phenomenons and highlighted their key roles in human cancers. Furthermore, their differential expression may be a potential biomarker for tumor prognosis. Despite this, there are still many unstudied members of DUSPs need to further explore their precise roles and mechanism in cancers. Most importantly, the systematic review is very limited on the functional/mechanistic characteristics and clinical application of DUSPs at present. In this review, the structures, functions and underlying mechanisms of DUSPs are systematically reviewed, and the molecular and functional characteristics of DUSPs in different tumor types according to the current researches are summarized. In addition, the potential roles of the unstudied members and the possible different mechanisms of DUSPs in cancer are discussed and classified based on homology alignment and structural domain analyses. Moreover, the specific characteristics of their expression and prognosis are further determined in more than 30 types of human cancers by using the online databases. Finally, their potential application in precise diagnosis, prognosis and treatment of different types of cancers, and the main possible problems for the clinical application at present are prospected.
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Affiliation(s)
- Ping-Ping Gao
- Breast and Thyroid Surgery, Southwest Hospital, Army Medical University, Chongqing 400038, China
| | - Xiao-Wei Qi
- Breast and Thyroid Surgery, Southwest Hospital, Army Medical University, Chongqing 400038, China
| | - Na Sun
- Breast and Thyroid Surgery, Southwest Hospital, Army Medical University, Chongqing 400038, China
| | - Yuan-Yuan Sun
- Institute of Toxicology, College of Preventive Medicine, Army Medical University, Chongqing 400038, China; Department of Clinical Pharmacy, Jilin University School of Pharmaceutical Sciences, Changchun, Jilin 130023, China
| | - Ye Zhang
- Breast and Thyroid Surgery, Southwest Hospital, Army Medical University, Chongqing 400038, China
| | - Xuan-Ni Tan
- Breast and Thyroid Surgery, Southwest Hospital, Army Medical University, Chongqing 400038, China
| | - Jun Ding
- Department of Hepatobiliary Surgery, Third Affiliated Hospital of Chongqing Medical University, Chongqing 401120, China
| | - Fei Han
- Institute of Toxicology, College of Preventive Medicine, Army Medical University, Chongqing 400038, China.
| | - Yi Zhang
- Breast and Thyroid Surgery, Southwest Hospital, Army Medical University, Chongqing 400038, China.
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48
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Chen Y, Wang Q, Cao L, Tang Y, Yao M, Bi H, Huang Y, Sun G, Song J. Nicotine-derived NNK induces the stemness enrichment of CRC cells through regulating the balance of DUSP4-ERK1/2 feedback loop. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 214:112057. [PMID: 33662786 DOI: 10.1016/j.ecoenv.2021.112057] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 02/05/2021] [Accepted: 02/10/2021] [Indexed: 06/12/2023]
Abstract
Cigarette smoking has been considered as an independent risk factor for colorectal cancer (CRC) initiation and progression. In this study, we found that cigarette smoking was significantly associated with poor CRC differentiation (P = 0.040). Since studies have indicated that poorly differentiated tumors are more aggressive and metastasize earlier, leading to poorer prognosis; and cancer stem cells (CSCs) are largely responsible for tumor differentiation state, here we observed that the exposure of nicotine-derived 4-(methylnitrosamino)- 1-(3-pyridyl)- 1-butanone (NNK) promoted cell sphere formation and the expression of the stem cell markers, CD44, OCT4, C-MYC and NANOG in HCT8 and DLD-1 cells. Further colony formation assay, CCK-8 assay and tumor-bearing experiment showed that NNK exposure significantly increased the proliferative and growth ability of CRC cells. In mechanism, we found that NNK-activated ERK1/2 played an important role in enrichment of CRC stem cells and the up-regulation of DUSP4, a major negative regulator of ERK1/2. Moreover, DUSP4 up-regulation was essential for maintaining NNK-activated ERK1/2 in an appropriate level, which was an required event for NNK-induced stemness enrichment of CRC cells. Taken together, our findings provided a possible mechanistic insight into cigarette smoking-induced CRC progression.
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Affiliation(s)
- Yansu Chen
- School of Public Health, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221002, Jiangsu Province, China
| | - Qinzhi Wang
- School of Public Health, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221002, Jiangsu Province, China
| | - Lin Cao
- School of Public Health, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221002, Jiangsu Province, China; Xuzhou Center for Disease Control and Prevention, 221002 Xuzhou, Jiangsu Province, China
| | - Yu Tang
- School of Public Health, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221002, Jiangsu Province, China
| | - Meixue Yao
- School of Public Health, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221002, Jiangsu Province, China
| | - Haoran Bi
- School of Public Health, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221002, Jiangsu Province, China
| | - Yefei Huang
- School of Public Health, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221002, Jiangsu Province, China
| | - Guixiang Sun
- School of Public Health, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221002, Jiangsu Province, China
| | - Jun Song
- School of Public Health, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221002, Jiangsu Province, China; Department of General Surgery, Affiliated Hospital of Xuzhou Medical University, 221002 Xuzhou, Jiangsu Province, China.
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49
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Low HB, Wong ZL, Wu B, Kong LR, Png CW, Cho YL, Li CW, Xiao F, Xin X, Yang H, Loo JM, Lee FYX, Tan IBH, DasGupta R, Shen HM, Schwarz H, Gascoigne NRJ, Goh BC, Xu X, Zhang Y. DUSP16 promotes cancer chemoresistance through regulation of mitochondria-mediated cell death. Nat Commun 2021; 12:2284. [PMID: 33863904 PMCID: PMC8052345 DOI: 10.1038/s41467-021-22638-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 03/18/2021] [Indexed: 02/02/2023] Open
Abstract
Drug resistance is a major obstacle to the treatment of most human tumors. In this study, we find that dual-specificity phosphatase 16 (DUSP16) regulates resistance to chemotherapy in nasopharyngeal carcinoma, colorectal cancer, gastric and breast cancer. Cancer cells expressing higher DUSP16 are intrinsically more resistant to chemotherapy-induced cell death than cells with lower DUSP16 expression. Overexpression of DUSP16 in cancer cells leads to increased resistance to cell death upon chemotherapy treatment. In contrast, knockdown of DUSP16 in cancer cells increases their sensitivity to treatment. Mechanistically, DUSP16 inhibits JNK and p38 activation, thereby reducing BAX accumulation in mitochondria to reduce apoptosis. Analysis of patient survival in head & neck cancer and breast cancer patient cohorts supports DUSP16 as a marker for sensitivity to chemotherapy and therapeutic outcome. This study therefore identifies DUSP16 as a prognostic marker for the efficacy of chemotherapy, and as a therapeutic target for overcoming chemoresistance in cancer.
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Affiliation(s)
- Heng Boon Low
- grid.4280.e0000 0001 2180 6431Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore ,grid.4280.e0000 0001 2180 6431Immunology Programme, the Life Science Institute, National University of Singapore, Singapore, Singapore
| | - Zhen Lim Wong
- grid.4280.e0000 0001 2180 6431Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore ,grid.4280.e0000 0001 2180 6431Immunology Programme, the Life Science Institute, National University of Singapore, Singapore, Singapore
| | - Bangyuan Wu
- grid.4280.e0000 0001 2180 6431Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore ,grid.4280.e0000 0001 2180 6431Immunology Programme, the Life Science Institute, National University of Singapore, Singapore, Singapore ,grid.411527.40000 0004 0610 111XCollege of Life Science, China West Normal University, Nanchong, Sichuan China
| | - Li Ren Kong
- grid.4280.e0000 0001 2180 6431Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Chin Wen Png
- grid.4280.e0000 0001 2180 6431Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore ,grid.4280.e0000 0001 2180 6431Immunology Programme, the Life Science Institute, National University of Singapore, Singapore, Singapore
| | - Yik-Lam Cho
- grid.4280.e0000 0001 2180 6431Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Chun-Wei Li
- grid.412615.5Department of Otorhinolaryngology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Fengchun Xiao
- grid.417400.60000 0004 1799 0055Department of Pathology, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - Xuan Xin
- grid.4280.e0000 0001 2180 6431Department of Mathematics, National University of Singapore, Singapore, Singapore
| | - Henry Yang
- grid.4280.e0000 0001 2180 6431Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore
| | - Jia Min Loo
- grid.418377.e0000 0004 0620 715XGenome Institute of Singapore, Agency of Science Technology and Research (A*Star), Singapore, Singapore
| | - Fiona Yi Xin Lee
- grid.410724.40000 0004 0620 9745Division of Medical Oncology, National Cancer Center, Singapore, Singapore
| | - Iain Bee Huat Tan
- grid.410724.40000 0004 0620 9745Division of Medical Oncology, National Cancer Center, Singapore, Singapore
| | - Ramanuj DasGupta
- grid.418377.e0000 0004 0620 715XGenome Institute of Singapore, Agency of Science Technology and Research (A*Star), Singapore, Singapore
| | - Han-Ming Shen
- grid.4280.e0000 0001 2180 6431Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore ,grid.437123.00000 0004 1794 8068Faculty of Health Sciences, University of Macau, Macau, China
| | - Herbert Schwarz
- grid.4280.e0000 0001 2180 6431Immunology Programme, the Life Science Institute, National University of Singapore, Singapore, Singapore ,grid.4280.e0000 0001 2180 6431Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Nicholas R. J. Gascoigne
- grid.4280.e0000 0001 2180 6431Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore ,grid.4280.e0000 0001 2180 6431Immunology Programme, the Life Science Institute, National University of Singapore, Singapore, Singapore
| | - Boon Cher Goh
- grid.4280.e0000 0001 2180 6431Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore ,grid.440782.d0000 0004 0507 018XDepartment of Haematology-Oncology, National University Cancer Institute, Singapore, Singapore ,grid.4280.e0000 0001 2180 6431Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Xiaohong Xu
- grid.417400.60000 0004 1799 0055Department of Breast Surgery, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - Yongliang Zhang
- grid.4280.e0000 0001 2180 6431Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore ,grid.4280.e0000 0001 2180 6431Immunology Programme, the Life Science Institute, National University of Singapore, Singapore, Singapore
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50
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Marmion RA, Yang L, Goyal Y, Jindal GA, Wetzel JL, Singh M, Schüpbach T, Shvartsman SY. Molecular mechanisms underlying cellular effects of human MEK1 mutations. Mol Biol Cell 2021; 32:974-983. [PMID: 33476180 PMCID: PMC8108529 DOI: 10.1091/mbc.e20-10-0625] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Terminal regions of Drosophila embryos are patterned by signaling through ERK, which is genetically deregulated in multiple human diseases. Quantitative studies of terminal patterning have been recently used to investigate gain-of-function variants of human MEK1, encoding the MEK kinase that directly activates ERK by dual phosphorylation. Unexpectedly, several mutations reduced ERK activation by extracellular signals, possibly through a negative feedback triggered by signal-independent activity of the mutant variants. Here we present experimental evidence supporting this model. Using a MEK variant that combines a mutation within the negative regulatory region with alanine substitutions in the activation loop, we prove that pathogenic variants indeed acquire signal-independent kinase activity. We also demonstrate that signal-dependent activation of these variants is independent of kinase suppressor of Ras, a conserved adaptor that is indispensable for activation of normal MEK. Finally, we show that attenuation of ERK activation by extracellular signals stems from transcriptional induction of Mkp3, a dual specificity phosphatase that deactivates ERK by dephosphorylation. These findings in the Drosophila embryo highlight its power for investigating diverse effects of human disease mutations.
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Affiliation(s)
- Robert A Marmion
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544
| | - Liu Yang
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544
| | - Yogesh Goyal
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544.,Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544.,Department of Bioengineering, University of Pennsylvania, Philadelphia, PA 19104
| | - Granton A Jindal
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544.,Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544.,Department of Medicine, University of California San Diego, La Jolla, CA 92093
| | - Joshua L Wetzel
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544.,Department of Computer Science, Princeton University, Princeton, NJ 08540
| | - Mona Singh
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544.,Department of Computer Science, Princeton University, Princeton, NJ 08540
| | - Trudi Schüpbach
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544
| | - Stanislav Y Shvartsman
- Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544.,Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544.,Department of Molecular Biology, Princeton University, Princeton, NJ 08544.,Flatiron Institute, Simons Foundation, New York, NY 10010
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