1
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Ouyang X, Wang Z, Wu B, Yang X, Dong B. The Conserved Transcriptional Activation Activity Identified in Dual-Specificity Tyrosine-(Y)-Phosphorylation-Regulated Kinase 1. Biomolecules 2023; 13:biom13020283. [PMID: 36830653 PMCID: PMC9953678 DOI: 10.3390/biom13020283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 01/27/2023] [Accepted: 01/30/2023] [Indexed: 02/05/2023] Open
Abstract
Dual-specificity tyrosine-(Y)-phosphorylation-regulated kinase 1 (DYRK1) encodes a conserved protein kinase that is indispensable to neuron development. However, whether DYRK1 possesses additional functions apart from kinase function remains poorly understood. In this study, we firstly demonstrated that the C-terminal of ascidian Ciona robusta DYRK1 (CrDYRK1) showed transcriptional activation activity independent of its kinase function. The transcriptional activation activity of CrDYRK1 could be autoinhibited by a repression domain in the N-terminal. More excitingly, both activation and repression domains were retained in HsDYRK1A in humans. The genes, activated by the activation domain of HsDYRK1A, are mainly involved in ion transport and neuroactive ligand-receptor interaction. We further found that numerous mutation sites relevant to the DYRK1A-related intellectual disability syndrome locate in the C-terminal of HsDYRK1A. Then, we identified several specific DNA motifs in the transcriptional regulation region of those activated genes. Taken together, we identified a conserved transcription activation domain in DYRK1 in urochordates and vertebrates. The activation is independent of the kinase activity of DYRK1 and can be repressed by its own N-terminal. Transcriptome and mutation data indicate that the transcriptional activation ability of HsDYRK1A is potentially involved in synaptic transmission and neuronal function related to the intellectual disability syndrome.
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Affiliation(s)
- Xiuke Ouyang
- Fang Zongxi Center, MoE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
| | - Zhuqing Wang
- Fang Zongxi Center, MoE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
| | - Bingtong Wu
- Fang Zongxi Center, MoE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
| | - Xiuxia Yang
- Fang Zongxi Center, MoE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
| | - Bo Dong
- Fang Zongxi Center, MoE Key Laboratory of Marine Genetics and Breeding, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
- Laoshan Laboratory, Qingdao 266237, China
- Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao 266003, China
- Correspondence:
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2
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Zeng S, Li M, Cheng X, Lu S, Feng Z, Jiang Z, Sun Z, Xu X, Mao H, Hu C. Grass carp (Ctenopharyngodon idella) DYRK2 modulates cell apoptosis through phosphorylating p53. FISH & SHELLFISH IMMUNOLOGY 2022; 127:542-548. [PMID: 35781054 DOI: 10.1016/j.fsi.2022.06.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 06/18/2022] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
In mammals, DYRK2 increases p53 phosphorylation level by interacting with it and then promotes cell apoptosis. However, the function of fish DYRK2 has not yet been elucidated. In this paper, we cloned and identified the coding sequence (CDS) of a grass carp DYRK2 (CiDYRK2) which is 1773 bp in length and encodes 590 amino acids. SMART predictive analysis showed that CiDYRK2 possesses a serine/threonine kinase domain. Subsequently, we used the dsRNA analog polyinosinic-polycytidylic acid (poly (I:C) and Grass carp reovirus (GCRV) to stimulate grass carp and CIK cells for different times and found that CiDYRK2 mRNA was significantly up-regulated both in fish tissues and cells. To explore the function of CiDYRK2, we carried out overexpression and knockdown experiments of CiDYRK2 in CIK cells. Real-time quantitative PCR (Q-PCR), TdT-mediated dUTP nick end labeling (TUNEL) assay and flow cytometry were used to detect the ratio of BAX/BCL-2 mRNA, the number of TUNEL positive cells, the proportion of Annexin V-positive cells respectively. The results showed that CiDYRK2 significantly up-regulated BAX/Bcl-2 mRNA ratio and increased the number of TUNEL-positive cells, as well as the proportion of Annexin V-positive cells. On the contrary, knock-down of CiDYRK2 significantly down-regulated BAX/Bcl-2 mRNA ratio in the cells. Therefore, CiDYRK2 promoted cell apoptosis. To study the molecular mechanism by which CiDYRK2 promoting cell apoptosis, subcellular localization and immunoprecipitation experiments were used to study the relationship between grass carp DYRK2 and the pro-apoptotic protein p53. The results showed that CiDYRK2 and Cip53 were located and co-localized in the nucleus. Co-immunoprecipitation experiment also showed that CiDYRK2 and Cip53 can bind with each other. We further found that DYRK2 can increase the phosphorylation level of p53. In a word, our results showed that grass carp DYRK2 induces cell apoptosis by increasing the phosphorylation level of p53.
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Affiliation(s)
- Shanshan Zeng
- School of Life Science, Key Lab of Aquatic Resources and Utilization of Jiangxi, Province, Nanchang University, Nanchang, 330031, China
| | - Meifeng Li
- School of Life Science, Key Lab of Aquatic Resources and Utilization of Jiangxi, Province, Nanchang University, Nanchang, 330031, China
| | - Xining Cheng
- School of Life Science, Key Lab of Aquatic Resources and Utilization of Jiangxi, Province, Nanchang University, Nanchang, 330031, China
| | - Shina Lu
- School of Life Science, Key Lab of Aquatic Resources and Utilization of Jiangxi, Province, Nanchang University, Nanchang, 330031, China
| | - Zhiqing Feng
- School of Life Science, Key Lab of Aquatic Resources and Utilization of Jiangxi, Province, Nanchang University, Nanchang, 330031, China
| | - Zeyin Jiang
- School of Life Science, Key Lab of Aquatic Resources and Utilization of Jiangxi, Province, Nanchang University, Nanchang, 330031, China
| | - Zhichao Sun
- School of Life Science, Key Lab of Aquatic Resources and Utilization of Jiangxi, Province, Nanchang University, Nanchang, 330031, China
| | - Xiaowen Xu
- School of Life Science, Key Lab of Aquatic Resources and Utilization of Jiangxi, Province, Nanchang University, Nanchang, 330031, China
| | - Huiling Mao
- School of Life Science, Key Lab of Aquatic Resources and Utilization of Jiangxi, Province, Nanchang University, Nanchang, 330031, China
| | - Chengyu Hu
- School of Life Science, Key Lab of Aquatic Resources and Utilization of Jiangxi, Province, Nanchang University, Nanchang, 330031, China.
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3
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Yuan K, Li Z, Kuang W, Wang X, Ji M, Chen W, Ding J, Li J, Min W, Sun C, Ye X, Lu M, Wang L, Ge H, Jiang Y, Hao H, Xiao Y, Yang P. Targeting dual-specificity tyrosine phosphorylation-regulated kinase 2 with a highly selective inhibitor for the treatment of prostate cancer. Nat Commun 2022; 13:2903. [PMID: 35614066 PMCID: PMC9133015 DOI: 10.1038/s41467-022-30581-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Accepted: 05/05/2022] [Indexed: 11/10/2022] Open
Abstract
Prostate cancer (PCa) is one of the most prevalent cancers in men worldwide, and hormonal therapy plays a key role in the treatment of PCa. However, the drug resistance of hormonal therapy makes it urgent and necessary to identify novel targets for PCa treatment. Herein, dual-specificity tyrosine phosphorylation-regulated kinase 2 (DYRK2) is found and confirmed to be highly expressed in the PCa tissues and cells, and knock-down of DYRK2 remarkably reduces PCa burden in vitro and in vivo. On the base of DYRK2 acting as a promising target, we further discover a highly selective DYRK2 inhibitor YK-2-69, which specifically interacts with Lys-231 and Lys-234 in the co-crystal structure. Especially, YK-2-69 exhibits more potent anti-PCa efficacy than the first-line drug enzalutamide in vivo. Meanwhile, YK-2-69 displays favorable safety properties with a maximal tolerable dose of more than 10,000 mg/kg and pharmacokinetic profiles with 56% bioavailability. In summary, we identify DYRK2 as a potential drug target and verify its critical roles in PCa. Meanwhile, we discover a highly selective DYRK2 inhibitor with favorable druggability for the treatment of PCa. The kinase DYRK2 is a known oncogene but its role in prostate cancer is unexplored. Here, the authors identify DYRK2 as a target for prostate cancer with a role in invasion and they discover a specific DYRK2 inhibitor that has good pharmacokinetics and efficacy in vivo.
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Affiliation(s)
- Kai Yuan
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 210009, Nanjing, China.,Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 211198, Nanjing, China
| | - Zhaoxing Li
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 210009, Nanjing, China.,Department of Pharmacology, School of Pharmacy, China Pharmaceutical University, 211198, Nanjing, China
| | - Wenbin Kuang
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 210009, Nanjing, China.,Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 211198, Nanjing, China
| | - Xiao Wang
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 210009, Nanjing, China.,Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 211198, Nanjing, China
| | - Minghui Ji
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 210009, Nanjing, China.,Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 211198, Nanjing, China
| | - Weijiao Chen
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 210009, Nanjing, China.,Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 211198, Nanjing, China
| | - Jiayu Ding
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 210009, Nanjing, China.,Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 211198, Nanjing, China
| | - Jiaxing Li
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 210009, Nanjing, China.,Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 211198, Nanjing, China
| | - Wenjian Min
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 210009, Nanjing, China.,Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 211198, Nanjing, China
| | - Chengliang Sun
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 210009, Nanjing, China.,Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 211198, Nanjing, China
| | - Xiuquan Ye
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 210009, Nanjing, China.,Department of Pharmacology, School of Pharmacy, China Pharmaceutical University, 211198, Nanjing, China
| | - Meiling Lu
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 210009, Nanjing, China.,School of Life Science and Technology, China Pharmaceutical University, 211198, Nanjing, China
| | - Liping Wang
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 210009, Nanjing, China.,Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 211198, Nanjing, China
| | - Haixia Ge
- School of Life Sciences, Huzhou University, 313000, Huzhou, China
| | - Yuzhang Jiang
- Department of Laboratory, Huai'an First People's Hospital, Nanjing Medical University, 223300, Huai'an, Jiangsu, China.
| | - Haiping Hao
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 210009, Nanjing, China. .,Department of Pharmacology, School of Pharmacy, China Pharmaceutical University, 211198, Nanjing, China.
| | - Yibei Xiao
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 210009, Nanjing, China. .,Department of Pharmacology, School of Pharmacy, China Pharmaceutical University, 211198, Nanjing, China.
| | - Peng Yang
- State Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, 210009, Nanjing, China. .,Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 211198, Nanjing, China.
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4
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Zhang X, Xiao R, Lu B, Wu H, Jiang C, Li P, Huang J. Kinase DYRK2 acts as a regulator of autophagy and an indicator of favorable prognosis in gastric carcinoma. Colloids Surf B Biointerfaces 2021; 209:112182. [PMID: 34749023 DOI: 10.1016/j.colsurfb.2021.112182] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 10/20/2021] [Accepted: 10/23/2021] [Indexed: 01/22/2023]
Abstract
Gastric cancer (GC) is the third leading cause of cancer-related death worldwide; therefore, new and more specific molecules for GC are needed. Here, we found that dual specificity tyrosine phosphorylation regulated kinase 2 (DYRK2) may be a specific marker for GC. Immunohistochemistry (IHC) and statistical and bioinformatics analyses were conducted to detect DYRK2 expression in stomach tissues. The role of DYRK2 in GC was analyzed with a nude mouse model and CCK-8, wound healing and Transwell assays. Western blotting and immunofluorescence experiments were also performed to elucidate the relationship between DYRK2 expression and both epithelial-mesenchymal transition (EMT) and autophagy progression. We found that DYRK2 expression in GC tissues was lower than that in benign or normal tissues, and patients with high DYRK2 expression had a good prognosis. The in vitro results showed that DYRK2 expression inhibited the tumorigenic activities of GC, including proliferation, migration, and invasion. By analyzing the expression of EMT markers after altering DYRK2 expression, we observed that DYRK2 inhibits the occurrence of EMT. The nude mouse model revealed that DYRK2 inhibits tumor growth. Finally, we used Western blotting and immunofluorescence assays and found that DYRK2 promotes autophagy. Based on these data, DYRK2 may be a good reference indicator for the clinical diagnosis of GC.
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Affiliation(s)
- Xiaojing Zhang
- Department of Clinical Biobank & Institute of Oncology, Nantong University Affiliated Hospital, Nantong 226001, China
| | - Runze Xiao
- Clinical Medicine, Xuzhou Medical University, Xuzhou 221000, China
| | - Bing Lu
- Department of Clinical Biobank & Institute of Oncology, Nantong University Affiliated Hospital, Nantong 226001, China
| | - Han Wu
- Department of General Surgery, Nantong University Affiliated Hospital, Nantong 226001, China
| | - Chunyi Jiang
- Department of Pathology, Nantong University Affiliated Hospital, Nantong 226001, China
| | - Peng Li
- Department of General Surgery, Nantong University Affiliated Hospital, Nantong 226001, China
| | - Jianfei Huang
- Department of Clinical Biobank & Institute of Oncology, Nantong University Affiliated Hospital, Nantong 226001, China.
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5
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Park A, Hwang J, Lee JY, Heo EJ, Na YJ, Kang S, Jeong KS, Kim KY, Shin SJ, Lee H. Synthesis of novel 1H-Pyrazolo[3,4-b]pyridine derivatives as DYRK 1A/1B inhibitors. Bioorg Med Chem Lett 2021; 47:128226. [PMID: 34182093 DOI: 10.1016/j.bmcl.2021.128226] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 06/16/2021] [Accepted: 06/20/2021] [Indexed: 02/06/2023]
Abstract
As DYRK1A and 1B inhibitors, 1H-pyrazolo[3,4-b]pyridine derivatives were synthesized. Mostly, 3-aryl-5-arylamino compounds (6) and 3,5-diaryl compounds (8 and 9) were prepared and especially, 3,5-diaryl compound 8 and 9 showed excellent DYRK1B inhibitory enzymatic activities with IC50 Values of 3-287 nM. Among them, 3-(4-hydroxyphenyl), 5-(3,4-dihydroxyphenyl)-1H-pyrazolo[3,4-b]pyridine (8h) exhibited the highest inhibitory enzymatic activity (IC50 = 3 nM) and cell proliferation inhibitory activity (IC50 = 1.6 µM) towards HCT116 colon cancer cells. Also compound 8h has excellent inhibitory activities in patient-derived colon cancer organoids model as well as in 3D spheroid assay model of SW480 and SW620. The docking study supported that we confirmed that compound 8h binds to DYRK1B through various hydrogen bonding interactions and hydrophobic interactions.
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Affiliation(s)
- Areum Park
- Infectious Diseases Therapeutic Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea; Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Jieon Hwang
- Department of Medicine, Yonsei University College of Medicine, Seoul 03722, Republic of Korea; Songdang Institute for Cancer Research, Yonsei University College of Medicine, Seoul 03722, Republic of Korea
| | - Joo-Youn Lee
- Infectious Diseases Therapeutic Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Eun Ji Heo
- Graduate School of New Drug Discovery and Development, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Yoon-Ju Na
- Graduate School of New Drug Discovery and Development, Chungnam National University, Daejeon 34134, Republic of Korea; Drug Discovery Platform Technology Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Sein Kang
- Graduate School of New Drug Discovery and Development, Chungnam National University, Daejeon 34134, Republic of Korea; Drug Discovery Platform Technology Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Kyu-Sung Jeong
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Ki Young Kim
- Graduate School of New Drug Discovery and Development, Chungnam National University, Daejeon 34134, Republic of Korea; Drug Discovery Platform Technology Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea.
| | - Sang Joon Shin
- Songdang Institute for Cancer Research, Yonsei University College of Medicine, Seoul 03722, Republic of Korea; Division of Medical Oncology, Department of Internal Medicine, Yonsei Cancer Center, Yonsei University College of Medicine, Seoul 03722, Republic of Korea.
| | - Hyuk Lee
- Infectious Diseases Therapeutic Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea; Graduate School of New Drug Discovery and Development, Chungnam National University, Daejeon 34134, Republic of Korea.
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6
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Tarpley M, Oladapo HO, Strepay D, Caligan TB, Chdid L, Shehata H, Roques JR, Thomas R, Laudeman CP, Onyenwoke RU, Darr DB, Williams KP. Identification of harmine and β-carboline analogs from a high-throughput screen of an approved drug collection; profiling as differential inhibitors of DYRK1A and monoamine oxidase A and for in vitro and in vivo anti-cancer studies. Eur J Pharm Sci 2021; 162:105821. [PMID: 33781856 PMCID: PMC8404221 DOI: 10.1016/j.ejps.2021.105821] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 02/25/2021] [Accepted: 03/21/2021] [Indexed: 12/16/2022]
Abstract
DYRK1A (dual-specificity tyrosine phosphorylation-regulated kinase 1a) is highly expressed in glioma, an aggressive brain tumor, and has been proposed as a therapeutic target for cancer. In the current study, we have used an optimized and validated time-resolved fluorescence energy transfer (TR-FRET)-based DYRK1A assay for high-throughput screening (HTS) in 384-well format. A small-scale screen of the FDA-approved Prestwick drug collection identified the β-carboline, harmine, and four related analogs as DYRK1A inhibitors. Hits were confirmed by dose response and in an orthogonal DYRK1A assay. Harmine's potential therapeutic use has been hampered by its off-target activity for monoamine oxidase A (MAO-A) which impacts multiple nervous system targets. Selectivity profiling of harmine and a broader collection of analogs allowed us to map some divergent SAR (structure-activity relationships) for the DYRK1A and MAO-A activities. The panel of harmine analogs had varying activities in vitro in glioblastoma (GBM) cell lines when tested for anti-proliferative effects using a high content imaging assay. In particular, of the identified analogs, harmol was found to have the best selectivity for DYRK1A over MAO-A and, when tested in a glioma tumor xenograft model, harmol demonstrated a better therapeutic window compared to harmine.
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Affiliation(s)
- Michael Tarpley
- Biomanufacturing Research Institute and Technology Enterprise, North Carolina Central University, Durham, NC 27707, USA
| | - Helen O Oladapo
- Biomanufacturing Research Institute and Technology Enterprise, North Carolina Central University, Durham, NC 27707, USA; INBS PhD Program, North Carolina Central University, Durham, NC 27707, USA
| | - Dillon Strepay
- Department of Biological and Biomedical Sciences, North Carolina Central University, Durham, NC 27707, USA
| | - Thomas B Caligan
- Biomanufacturing Research Institute and Technology Enterprise, North Carolina Central University, Durham, NC 27707, USA
| | - Lhoucine Chdid
- Biomanufacturing Research Institute and Technology Enterprise, North Carolina Central University, Durham, NC 27707, USA
| | - Hassan Shehata
- Biomanufacturing Research Institute and Technology Enterprise, North Carolina Central University, Durham, NC 27707, USA; INBS PhD Program, North Carolina Central University, Durham, NC 27707, USA
| | - Jose R Roques
- Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, NC 27514, USA
| | - Rhashad Thomas
- Department of Pharmaceutical Sciences; North Carolina Central University, Durham, NC 27707, USA
| | - Christopher P Laudeman
- Biomanufacturing Research Institute and Technology Enterprise, North Carolina Central University, Durham, NC 27707, USA
| | - Rob U Onyenwoke
- Biomanufacturing Research Institute and Technology Enterprise, North Carolina Central University, Durham, NC 27707, USA; Department of Pharmaceutical Sciences; North Carolina Central University, Durham, NC 27707, USA
| | - David B Darr
- Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, NC 27514, USA
| | - Kevin P Williams
- Biomanufacturing Research Institute and Technology Enterprise, North Carolina Central University, Durham, NC 27707, USA; Department of Pharmaceutical Sciences; North Carolina Central University, Durham, NC 27707, USA.
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7
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Park CS, Lewis AH, Chen TJ, Bridges CS, Shen Y, Suppipat K, Puppi M, Tomolonis JA, Pang PD, Mistretta TA, Ma L, Green MR, Rau R, Lacorazza HD. A KLF4-DYRK2-mediated pathway regulating self-renewal in CML stem cells. Blood 2019; 134:1960-1972. [PMID: 31515251 PMCID: PMC6887114 DOI: 10.1182/blood.2018875922] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 09/06/2019] [Indexed: 02/02/2023] Open
Abstract
Leukemia stem cells are a rare population with a primitive progenitor phenotype that can initiate, sustain, and recapitulate leukemia through a poorly understood mechanism of self-renewal. Here, we report that Krüppel-like factor 4 (KLF4) promotes disease progression in a murine model of chronic myeloid leukemia (CML)-like myeloproliferative neoplasia by repressing an inhibitory mechanism of preservation in leukemia stem/progenitor cells with leukemia-initiating capacity. Deletion of the Klf4 gene severely abrogated the maintenance of BCR-ABL1(p210)-induced CML by impairing survival and self-renewal in BCR-ABL1+ CD150+ lineage-negative Sca-1+ c-Kit+ leukemic cells. Mechanistically, KLF4 repressed the Dyrk2 gene in leukemic stem/progenitor cells; thus, loss of KLF4 resulted in elevated levels of dual-specificity tyrosine-(Y)-phosphorylation-regulated kinase 2 (DYRK2), which were associated with inhibition of survival and self-renewal via depletion of c-Myc protein and p53 activation. In addition to transcriptional regulation, stabilization of DYRK2 protein by inhibiting ubiquitin E3 ligase SIAH2 with vitamin K3 promoted apoptosis and abrogated self-renewal in murine and human CML stem/progenitor cells. Altogether, our results suggest that DYRK2 is a molecular checkpoint controlling p53- and c-Myc-mediated regulation of survival and self-renewal in CML cells with leukemic-initiating capacity that can be targeted with small molecules.
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MESH Headings
- Animals
- Cell Survival/drug effects
- Cell Survival/genetics
- Fusion Proteins, bcr-abl/genetics
- Fusion Proteins, bcr-abl/metabolism
- Gene Deletion
- Humans
- Kruppel-Like Factor 4
- Kruppel-Like Transcription Factors/genetics
- Kruppel-Like Transcription Factors/metabolism
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Mice
- Mice, Knockout
- Neoplastic Stem Cells/metabolism
- Neoplastic Stem Cells/pathology
- Protein Serine-Threonine Kinases/genetics
- Protein Serine-Threonine Kinases/metabolism
- Protein-Tyrosine Kinases/genetics
- Protein-Tyrosine Kinases/metabolism
- Proto-Oncogene Proteins c-myc/genetics
- Proto-Oncogene Proteins c-myc/metabolism
- Signal Transduction
- Tumor Suppressor Protein p53/genetics
- Tumor Suppressor Protein p53/metabolism
- Ubiquitin-Protein Ligases/genetics
- Ubiquitin-Protein Ligases/metabolism
- Vitamin K 3/pharmacology
- Dyrk Kinases
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Affiliation(s)
| | - Andrew H Lewis
- Department of Pathology and Immunology and
- Integrative Molecular and Biomedical Sciences Program, Baylor College of Medicine, Houston, TX
| | - Taylor J Chen
- Department of Pathology and Immunology and
- Integrative Molecular and Biomedical Sciences Program, Baylor College of Medicine, Houston, TX
| | | | - Ye Shen
- Department of Pathology and Immunology and
- Integrative Molecular and Biomedical Sciences Program, Baylor College of Medicine, Houston, TX
| | - Koramit Suppipat
- Texas Children's Cancer and Hematology Center, Texas Children's Hospital, Houston, TX
| | | | | | - Paul D Pang
- Integrative Molecular and Biomedical Sciences Program, Baylor College of Medicine, Houston, TX
| | | | - Leyuan Ma
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, Worcester, MA
| | - Michael R Green
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, Worcester, MA
| | - Rachel Rau
- Department of Pediatrics-Oncology, Baylor College of Medicine, Houston, TX
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8
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Lee SH, Suk K. Kinase-Based Taming of Brain Microglia Toward Disease-Modifying Therapy. Front Cell Neurosci 2018; 12:474. [PMID: 30568577 PMCID: PMC6289980 DOI: 10.3389/fncel.2018.00474] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Accepted: 11/20/2018] [Indexed: 12/11/2022] Open
Abstract
Microglia are the primary immune cells residing in the central nervous system (CNS), where they play essential roles in the health and disease. Depending on the CNS inflammatory milieu, they exist in either resting or activated states. Chronic neuroinflammation mediated by activated microglia is now considered to be a common characteristic shared by many neurodegenerative diseases such as Parkinson's disease, Alzheimer's disease, and amyotrophic lateral sclerosis, which currently pose a significant socioeconomic burden to the global healthcare system. Accumulating evidence has indicated protein kinases (PKs) as important drug targets for therapeutic interventions of these detrimental diseases. Here, we review recent findings suggesting that selected PKs potentially participate in microglia-mediated neuroinflammation. Taming microglial phenotypes by modulating the activity of these PKs holds great promise for the development of disease-modifying therapies for many neurodegenerative diseases.
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Affiliation(s)
- Sun-Hwa Lee
- New Drug Development Center, Daegu Gyeongbuk Medical Innovation Foundation, Daegu, South Korea
| | - Kyoungho Suk
- Department of Pharmacology, Brain Science and Engineering Institute, School of Medicine, Kyungpook National University, Daegu, South Korea
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9
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Monteiro MB, Ramm S, Chandrasekaran V, Boswell SA, Weber EJ, Lidberg KA, Kelly EJ, Vaidya VS. A High-Throughput Screen Identifies DYRK1A Inhibitor ID-8 that Stimulates Human Kidney Tubular Epithelial Cell Proliferation. J Am Soc Nephrol 2018; 29:2820-2833. [PMID: 30361326 PMCID: PMC6287872 DOI: 10.1681/asn.2018040392] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 09/20/2018] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND The death of epithelial cells in the proximal tubules is thought to be the primary cause of AKI, but epithelial cells that survive kidney injury have a remarkable ability to proliferate. Because proximal tubular epithelial cells play a predominant role in kidney regeneration after damage, a potential approach to treat AKI is to discover regenerative therapeutics capable of stimulating proliferation of these cells. METHODS We conducted a high-throughput phenotypic screen using 1902 biologically active compounds to identify new molecules that promote proliferation of primary human proximal tubular epithelial cells in vitro. RESULTS The primary screen identified 129 compounds that stimulated tubular epithelial cell proliferation. A secondary screen against these compounds over a range of four doses confirmed that eight resulted in a significant increase in cell number and incorporation of the modified thymidine analog EdU (indicating actively proliferating cells), compared with control conditions. These eight compounds also stimulated tubular cell proliferation in vitro after damage induced by hypoxia, cadmium chloride, cyclosporin A, or polymyxin B. ID-8, an inhibitor of dual-specificity tyrosine-phosphorylation-regulated kinase 1A (DYRK1A), was the top candidate identified as having a robust proproliferative effect in two-dimensional culture models as well as a microphysiologic, three-dimensional cell culture system. Target engagement and genetic knockdown studies and RNA sequencing confirmed binding of ID-8 to DYRK1A and upregulation of cyclins and other cell cycle regulators, leading to epithelial cell proliferation. CONCLUSIONS We have identified a potential first-in-class compound that stimulates human kidney tubular epithelial cell proliferation after acute damage in vitro.
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Affiliation(s)
- Maria B Monteiro
- Harvard Program in Therapeutic Science, Harvard Medical School Laboratory of Systems Pharmacology, Boston, Massachusetts
| | - Susanne Ramm
- Harvard Program in Therapeutic Science, Harvard Medical School Laboratory of Systems Pharmacology, Boston, Massachusetts
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts
| | - Vidya Chandrasekaran
- Harvard Program in Therapeutic Science, Harvard Medical School Laboratory of Systems Pharmacology, Boston, Massachusetts
| | - Sarah A Boswell
- Harvard Program in Therapeutic Science, Harvard Medical School Laboratory of Systems Pharmacology, Boston, Massachusetts
| | - Elijah J Weber
- Department of Pharmaceutics, University of Washington, Seattle, Washington; and
| | - Kevin A Lidberg
- Department of Pharmaceutics, University of Washington, Seattle, Washington; and
| | - Edward J Kelly
- Department of Pharmaceutics, University of Washington, Seattle, Washington; and
| | - Vishal S Vaidya
- Harvard Program in Therapeutic Science, Harvard Medical School Laboratory of Systems Pharmacology, Boston, Massachusetts;
- Renal Division, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
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10
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Xu L, Sun Y, Li M, Ge X. Dyrk2 mediated the release of proinflammatory cytokines in LPS-induced BV2 cells. Int J Biol Macromol 2018; 109:1115-1124. [PMID: 29155197 DOI: 10.1016/j.ijbiomac.2017.11.095] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 11/14/2017] [Accepted: 11/15/2017] [Indexed: 11/19/2022]
Abstract
NF-κB pathway and p38MAPK (p38mitogen-activated protein kinase) pathway have been shown to play a key role in neuroinflammation, however, the phosphorylation modification is an important process that affects the activation of above pathways. Dual-specificity tyrosine-phosphorylation-regulated kinase 2(Dyrk2), as a phosphokinase that can phosphorylate signal molecules, has been demonstrated to regulate Type I Interferon(TIF) by promoting ser527 phosphorylation of TBK1. Therefore, to investigate the role of Dyrk2 in neuroinflammation, we analyzed the effect of Dyrk2 on LPS-induced the activation of microglia. Here, we found Dyrk2 expressed in BV2 cells, and LPS induced different expression trend of Dyrk2 in the cytoplasm and nucleus. In addition, we revealed that Dyrk2 interacted with Akt, p38MAPK and NF-κB subunit p65, however, in the nucleus of BV2 cells, Dyrk2 selectively interacted with p38MAPK instead of with p65. Although the overexpression of Dyrk2 increased the expression level of phospho-p65, phospho-Akt and phospho-p38MAPK in LPS-stimulated BV2 cells, less TNF-α and IL-1β were detected. Probably, the inhibitory effect of Dyrk2 on the release of TNF-α and IL-1β was associated with the induction of phospho-Akt. In conclusion, these data suggested Dyrk2 involved in regulating LPS-induced the release of proinflammatory cytokines through its phosphokinase function.
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Affiliation(s)
- Li Xu
- Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong 226001, Jiangsu Province, People's Republic of China
| | - Yuxiang Sun
- Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong 226001, Jiangsu Province, People's Republic of China.
| | - Mengmeng Li
- Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong 226001, Jiangsu Province, People's Republic of China
| | - Xin Ge
- Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong 226001, Jiangsu Province, People's Republic of China
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11
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Guterman-Ram G, Pesic M, Orenbuch A, Czeiger T, Aflalo A, Levaot N. Dual-specificity tyrosine phosphorylation-regulated kinase 2 regulates osteoclast fusion in a cell heterotypic manner. J Cell Physiol 2018; 233:617-629. [PMID: 28332708 DOI: 10.1002/jcp.25922] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 03/21/2017] [Indexed: 12/14/2022]
Abstract
Monocyte fusion into osteoclasts, bone resorbing cells, plays a key role in bone remodeling and homeostasis; therefore, aberrant cell fusion may be involved in a variety of debilitating bone diseases. Research in the last decade has led to the discovery of genes that regulate osteoclast fusion, but the basic molecular and cellular regulatory mechanisms underlying the fusion process are not completely understood. Here, we reveal a role for Dyrk2 in osteoclast fusion. We demonstrate that Dyrk2 down regulation promotes osteoclast fusion, whereas its overexpression inhibits fusion. Moreover, Dyrk2 also promotes the fusion of foreign-body giant cells, indicating that Dyrk2 plays a more general role in cell fusion. In an earlier study, we showed that fusion is a cell heterotypic process initiated by fusion-founder cells that fuse to fusion-follower cells, the latter of which are unable to initiate fusion. Here, we show that Dyrk2 limits the expansion of multinucleated founder cells through the suppression of the fusion competency of follower cells.
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Affiliation(s)
- Gali Guterman-Ram
- Department of Physiology and Cell Biology, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Milena Pesic
- Department of Physiology and Cell Biology, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Ayelet Orenbuch
- Department of Physiology and Cell Biology, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Tal Czeiger
- Department of Physiology and Cell Biology, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Anastasia Aflalo
- Department of Physiology and Cell Biology, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Noam Levaot
- Department of Physiology and Cell Biology, Ben-Gurion University of the Negev, Beer-Sheva, Israel
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Regenerative Medicine and Stem Cell (RMSC) Research Center, Beer-Sheva, Israel
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12
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Sun Y, Ge X, Li M, Xu L, Shen Y. Dyrk2 involved in regulating LPS-induced neuronal apoptosis. Int J Biol Macromol 2017; 104:979-986. [PMID: 28676338 DOI: 10.1016/j.ijbiomac.2017.06.087] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 06/18/2017] [Accepted: 06/20/2017] [Indexed: 11/29/2022]
Abstract
The activation of relevant signaling pathways plays a very important role in LPS-induced neuronal damage. Dual-specificity tyrosine-phosphorylation-regulated kinase 2(Dyrk2), as a phosphokinase that can directly or indirectly phosphorylate signal molecules, was recently reported to down-regulate Type I Interferon(TIF) by promoting ser527 phosphorylation of TBK1. To further investigate the role of Dyrk2 in neuroinflammation, we for the first time focused on its function in LPS-induced neuronal damage. We found LPS stimulation increased the expression of Dyrk2 in the nucleus and cytoplasm of neurons. In addition, overexpression of Dyrk2 not only reduced the level of TNF-α induction, but also obviously inhibited LPS-induced neuronal apoptosis. We further found that Dyrk2 promoted the induction of phospho-Akt, phospho-p65 and phospho-p38MAPK (p38 mitogen-activated protein kinase), but immunoprecipitation showed Dyrk2 interacted with and Akt, p38MAPK and IκBα (IkappaB-alpha), except NF-κB subunit p65. These findings suggest Dyrk2 can inhibit LPS-induced neuronal apoptosis and plays key roles in LPS-indcued signaling pathways by its phosphokinase function. These data provide a novel viewpoint that Dyrks family may have an important role in neuroinflammation, and provide a potential molecular target for improving neuronal apoptosis.
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Affiliation(s)
- Yuxiang Sun
- Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong, 226001, Jiangsu Province, People's Republic of China.
| | - Xin Ge
- Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong, 226001, Jiangsu Province, People's Republic of China
| | - Mengmeng Li
- Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong, 226001, Jiangsu Province, People's Republic of China
| | - Li Xu
- Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong, 226001, Jiangsu Province, People's Republic of China
| | - Yaodong Shen
- Department of Hematology, Affiliated Hospital of Nantong University, Nantong University, Nantong, 226001, Jiangsu Province, People's Republic of China.
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13
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Ito D, Yogosawa S, Mimoto R, Hirooka S, Horiuchi T, Eto K, Yanaga K, Yoshida K. Dual-specificity tyrosine-regulated kinase 2 is a suppressor and potential prognostic marker for liver metastasis of colorectal cancer. Cancer Sci 2017; 108:1565-1573. [PMID: 28502078 PMCID: PMC5543514 DOI: 10.1111/cas.13280] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 05/01/2017] [Accepted: 05/09/2017] [Indexed: 01/25/2023] Open
Abstract
Colorectal cancer is a common cancer and a leading cause of cancer-related death worldwide. The liver is a dominant metastatic site for patients with colorectal cancer. Molecular mechanisms that allow colorectal cancer cells to form liver metastases are largely unknown. Activation of epithelial-mesenchymal transition is the key step for metastasis of cancer cells. We recently reported that dual-specificity tyrosine-regulated kinase 2 (DYRK2) controls epithelial-mesenchymal transition in breast cancer and ovarian serous adenocarcinoma. The aim of this study is to clarify whether DYRK2 regulates liver metastases of colorectal cancer. We show that the ability of cell invasion and migration was abrogated in DYRK2-overexpressing cells. In an in vivo xenograft model, liver metastatic lesions were markedly diminished by ectopic expression of DYRK2. Furthermore, we found that patients whose liver metastases expressed low DYRK2 levels had significantly worse overall and disease-free survival. Given the findings that DYRK2 regulates cancer cell metastasis, we concluded that the expression status of DYRK2 could be a predictive marker for liver metastases of colorectal cancer.
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Affiliation(s)
- Daisuke Ito
- Department of BiochemistryJikei University School of MedicineTokyoJapan
- Department of SurgeryJikei University School of MedicineTokyoJapan
| | - Satomi Yogosawa
- Department of BiochemistryJikei University School of MedicineTokyoJapan
| | - Rei Mimoto
- Department of BiochemistryJikei University School of MedicineTokyoJapan
- Department of SurgeryJikei University School of MedicineTokyoJapan
| | - Shinichi Hirooka
- Department of PathologyJikei University School of MedicineTokyoJapan
| | - Takashi Horiuchi
- Department of SurgeryJikei University School of MedicineTokyoJapan
| | - Ken Eto
- Department of SurgeryJikei University School of MedicineTokyoJapan
| | - Katsuhiko Yanaga
- Department of SurgeryJikei University School of MedicineTokyoJapan
| | - Kiyotsugu Yoshida
- Department of BiochemistryJikei University School of MedicineTokyoJapan
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14
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Wang Y, Sun J, Wei X, Luan L, Zeng X, Wang C, Zhao W. Decrease of miR-622 expression suppresses migration and invasion by targeting regulation of DYRK2 in colorectal cancer cells. Onco Targets Ther 2017; 10:1091-1100. [PMID: 28260923 PMCID: PMC5328604 DOI: 10.2147/ott.s125724] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Background More and more evidence indicates that microRNAs are present and involved in many tumor-related diseases. The function of microRNA-622 (miR-622) in colorectal cancer (CRC) remains controversial. Dual specificity tyrosine phosphorylation-regulated kinase 2 (DYRK2) has been reported as a tumor suppressor gene in different cancers. The detailed regulation mechanism of DYRK2 in CRC remains unclear. Methods miR-622 and DYRK2 expression levels were detected at tissue and cellular level respectively by using real time polymerase chain reaction (PCR), Western blot, and immunohistochemical staining. Pearson’s correlation analysis was used to evaluate the correlation between miR-622 and DYRK2. Transwell assay was applied to measure the effect of miR-622 on migration and invasion of SW1116 and SW480. We used dual luciferase reporter assay to confirm the targeted binding effect of miR-622 and DYRK2 3′-untranslated region (3′UTR). An antisense experiment was executed to further confirm the role miR-622 had played with regard to migration and invasion by targeting regulation of DYRK2 pathway in CRC cells. Results In our research, we found that the expression of miR-622 was elevated in CRC tissues and cell lines compared to that of nonCRC tissues and the normal human colon epithelial cell line NCM460. Correspondingly, the expression of DYRK2 in CRC tissues and cell lines showed a contrary tendency. The different expression level of DYRK2 was closely correlated with clinicopathological characteristics of CRC patients. We demonstrated that down-regulation of miR-622 could inhibit the ability of migration and invasion of CRC cell lines SW1116 and SW480. Also, we confirmed that DYRK2 was negatively regulated by miR-622 via a specific targeted binding site within the 3′UTR. We finally verified that the migration and invasion ability of CRC cells in the conducted DYRK2 3′UTR defect plasmid transfection group were lower compared to miR-622 and cotransfection group. Conclusion The findings of this study indicate that a decrease of miR-622 expression could suppress migration and invasion by targeting regulation of DYRK2 and miR-622/DYRK2 could be a potential molecular treating target of CRC.
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Affiliation(s)
- Yong Wang
- The 4th Department of Orthopedic Surgery, Central Hospital affiliated to Shenyang Medical College, Shenyang
| | - Jie Sun
- Department of Pathology, Central Hospital affiliated to Shenyang Medical College, Shenyang
| | - Xilin Wei
- The 3rd Department of General Surgery, Central Hospital affiliated to Shenyang Medical College, Shenyang
| | - Lan Luan
- Department of Pathology, Central Hospital affiliated to Shenyang Medical College, Shenyang
| | - Xiandong Zeng
- Department of Surgical Oncology, Central Hospital affiliated to Shenyang Medical College, Shenyang, People's Republic of China
| | - Cuifang Wang
- Department of Pathology, Central Hospital affiliated to Shenyang Medical College, Shenyang
| | - Wei Zhao
- The 4th Department of Orthopedic Surgery, Central Hospital affiliated to Shenyang Medical College, Shenyang
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15
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Rossi SL, Lumpkin CJ, Harris AW, Holbrook J, Gentillon C, McCahan SM, Wang W, Butchbach MER. Identification of early gene expression changes in primary cultured neurons treated with topoisomerase I poisons. Biochem Biophys Res Commun 2016; 479:319-324. [PMID: 27641670 DOI: 10.1016/j.bbrc.2016.09.068] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 09/14/2016] [Indexed: 10/21/2022]
Abstract
Topoisomerase 1 (TOP1) poisons like camptothecin (CPT) are currently used in cancer chemotherapy but these compounds can have damaging, off-target effects on neurons leading to cognitive, sensory and motor deficits. To understand the molecular basis for the enhanced sensitivity of neurons to CPT, we examined the effects of compounds that inhibit TOP1-CPT, actinomycin D (ActD) and β-lapachone (β-Lap)-on primary cultured rat motor (MN) and cortical (CN) neurons as well as fibroblasts. Neuronal cells expressed higher levels of Top1 mRNA than fibroblasts but transcript levels are reduced in all cell types after treatment with CPT. Microarray analysis was performed to identify differentially regulated transcripts in MNs in response to a brief exposure to CPT. Pathway analysis of the differentially expressed transcripts revealed activation of ERK and JNK signaling cascades in CPT-treated MNs. Immediate-early genes like Fos, Egr-1 and Gadd45b were upregulated in CPT-treated MNs. Fos mRNA levels were elevated in all cell types treated with CPT; Egr-1, Gadd45b and Dyrk3 transcript levels, however, increased in CPT-treated MNs and CNs but decreased in CPT-treated fibroblasts. These transcripts may represent new targets for the development of therapeutic agents that mitigate the off-target effects of chemotherapy on the nervous system.
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Affiliation(s)
- Sharyn L Rossi
- Center for Applied Clinical Genomics, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA
| | - Casey J Lumpkin
- Center for Applied Clinical Genomics, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA; Department of Biological Sciences, University of Delaware, Newark, DE, USA
| | - Ashlee W Harris
- Center for Applied Clinical Genomics, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA
| | - Jennifer Holbrook
- Biomolecular Core Laboratory, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA
| | - Cinsley Gentillon
- Center for Applied Clinical Genomics, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA; Department of Biological Sciences, University of Delaware, Newark, DE, USA
| | - Suzanne M McCahan
- Center for Pediatric Research, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA; Bioinformatics Core Facility, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA; Department of Pediatrics, Thomas Jefferson University, Philadelphia, PA, USA
| | - Wenlan Wang
- Center for Applied Clinical Genomics, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA; Center for Pediatric Research, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA
| | - Matthew E R Butchbach
- Center for Applied Clinical Genomics, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA; Center for Pediatric Research, Nemours Biomedical Research, Nemours Alfred I. duPont Hospital for Children, Wilmington, DE, USA; Department of Biological Sciences, University of Delaware, Newark, DE, USA; Department of Pediatrics, Thomas Jefferson University, Philadelphia, PA, USA.
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16
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Kim D, Ntui VO, Xiong L. Arabidopsis YAK1 regulates abscisic acid response and drought resistance. FEBS Lett 2016; 590:2201-9. [PMID: 27264339 DOI: 10.1002/1873-3468.12234] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 05/21/2016] [Accepted: 05/30/2016] [Indexed: 11/06/2022]
Abstract
Abscisic acid (ABA) is an important phytohormone that controls several plant processes such as seed germination, seedling growth, and abiotic stress response. Here, we report that AtYak1 plays an important role in ABA signaling and postgermination growth in Arabidopsis. AtYak1 knockout mutant plants were hyposensitive to ABA inhibition of seed germination, cotyledon greening, seedling growth, and stomatal movement. atyak1-1 mutant plants display reduced drought stress resistance, as evidenced by water loss rate and survival rate. Molecular genetic analysis revealed that AtYak1 deficiency led to elevated expression of stomatal-related gene, MYB60, and down-regulation of several stress-responsive genes. Altogether, these results indicate that AtYak1 plays a role as a positive regulator in ABA-mediated drought response in Arabidopsis.
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Affiliation(s)
- Dongjin Kim
- Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Valentine Otang Ntui
- Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
| | - Liming Xiong
- Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
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17
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Epelboin Y, Quintric L, Guévélou E, Boudry P, Pichereau V, Corporeau C. The Kinome of Pacific Oyster Crassostrea gigas, Its Expression during Development and in Response to Environmental Factors. PLoS One 2016; 11:e0155435. [PMID: 27231950 PMCID: PMC4883820 DOI: 10.1371/journal.pone.0155435] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 04/28/2016] [Indexed: 01/08/2023] Open
Abstract
Oysters play an important role in estuarine and coastal marine habitats, where the majority of humans live. In these ecosystems, environmental degradation is substantial, and oysters must cope with highly dynamic and stressful environmental constraints during their lives in the intertidal zone. The availability of the genome sequence of the Pacific oyster Crassostrea gigas represents a unique opportunity for a comprehensive assessment of the signal transduction pathways that the species has developed to deal with this unique habitat. We performed an in silico analysis to identify, annotate and classify protein kinases in C. gigas, according to their kinase domain taxonomy classification, and compared with kinome already described in other animal species. The C. gigas kinome consists of 371 protein kinases, making it closely related to the sea urchin kinome, which has 353 protein kinases. The absence of gene redundancy in some groups of the C. gigas kinome may simplify functional studies of protein kinases. Through data mining of transcriptomes in C. gigas, we identified part of the kinome which may be central during development and may play a role in response to various environmental factors. Overall, this work contributes to a better understanding of key sensing pathways that may be central for adaptation to a highly dynamic marine environment.
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Affiliation(s)
- Yanouk Epelboin
- Ifremer, UMR 6539 CNRS/UBO/IRD/Ifremer, Laboratoire des sciences de l’Environnement Marin, Plouzané, France
| | - Laure Quintric
- Ifremer, Service Ressources Informatiques et Communications, Plouzané, France
| | - Eric Guévélou
- Ifremer, UMR 6539 CNRS/UBO/IRD/Ifremer, Laboratoire des sciences de l’Environnement Marin, Plouzané, France
| | - Pierre Boudry
- Ifremer, UMR 6539 CNRS/UBO/IRD/Ifremer, Laboratoire des sciences de l’Environnement Marin, Plouzané, France
| | - Vianney Pichereau
- UBO, UMR 6539 CNRS/UBO/IRD/Ifremer, Laboratoire des sciences de l’Environnement Marin, Plouzané, France
| | - Charlotte Corporeau
- Ifremer, UMR 6539 CNRS/UBO/IRD/Ifremer, Laboratoire des sciences de l’Environnement Marin, Plouzané, France
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18
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Zhang X, Xu P, Ni W, Fan H, Xu J, Chen Y, Huang W, Lu S, Liang L, Liu J, Chen B, Shi W. Downregulated DYRK2 expression is associated with poor prognosis and Oxaliplatin resistance in hepatocellular carcinoma. Pathol Res Pract 2016; 212:162-70. [PMID: 26804244 DOI: 10.1016/j.prp.2016.01.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2015] [Revised: 10/05/2015] [Accepted: 01/05/2016] [Indexed: 11/24/2022]
Abstract
We aimed to investigate the molecular mechanisms of DYRK2 and the HCC sensitivity to Oxaliplatin in DYRK2-depleted HCC cells. HCC tissue specimens were obtained from 86 HCC patients during hepatectomy. We used immunohistochemistry and western blot to analyze DYRK2 expression in HCC tissues and cell lines, and used siRNA transfection to decrease DYRK2 expression in HCC cells. Flow cytometry and CCK-8 assay were detected in cell cycle progression, cell proliferation and the efficacy of Oxaliplatin, DYRK2 was down-regulated in HCC tissues, compared with adjacent nontumor ones. The significant correlation between DYRK2 expression and clinicopathologic factors was apparently shown in the immunohistochemical and statistical analyses. The expression of DYRK2 was significantly associated with histological grade of HCC patients. Univariate and multivariate survival analyses revealed that DYRK2 was a significant predictor for overall survival of HCC patients. The depletion of DYRK2 promoted HCC cell proliferation, and increased resistance to Oxaliplatin. These data showed that the downregulated expression of DYRK2 in HCC tumor tissues could promote the proliferation of HCC cells. In addition, reducing DYRK2 expression was associated with poor prognosis and Oxaliplatin resistance in HCC.
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Affiliation(s)
- Xiubing Zhang
- Department of Medical Oncology, the Second Peoples Hospital of Nan Tong, 43 Tangzha Xinglong Road, Nantong 226002, Jiangsu Province, People's Republic of China
| | - Pan Xu
- Department of Radiotherapy, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong 226001, Jiangsu Province, People's Republic of China
| | - Wenkai Ni
- Department of Gastroenterology, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong 226001, Jiangsu Province, People's Republic of China
| | - Hui Fan
- Department of Medical Oncology, the Second Peoples Hospital of Nan Tong, 43 Tangzha Xinglong Road, Nantong 226002, Jiangsu Province, People's Republic of China
| | - Jian Xu
- Department of Medical Oncology, the Second Peoples Hospital of Nan Tong, 43 Tangzha Xinglong Road, Nantong 226002, Jiangsu Province, People's Republic of China
| | - Yongmei Chen
- Department of Medical Oncology, the Second Peoples Hospital of Nan Tong, 43 Tangzha Xinglong Road, Nantong 226002, Jiangsu Province, People's Republic of China
| | - Wei Huang
- Department of Pathogen Biology, Jiangsu Province Key Laboratory for Information and Molecular Drug Target, Nantong University, 9 Qiangyuan Road, Nantong 226019, Jiangsu Province, People's Republic of China
| | - Shumin Lu
- Department of Pathogen Biology, Jiangsu Province Key Laboratory for Information and Molecular Drug Target, Nantong University, 9 Qiangyuan Road, Nantong 226019, Jiangsu Province, People's Republic of China
| | - Li Liang
- Department of Pathogen Biology, Jiangsu Province Key Laboratory for Information and Molecular Drug Target, Nantong University, 9 Qiangyuan Road, Nantong 226019, Jiangsu Province, People's Republic of China
| | - Jinxia Liu
- Department of Gastroenterology, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong 226001, Jiangsu Province, People's Republic of China
| | - Buyou Chen
- Department of Radiotherapy, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong 226001, Jiangsu Province, People's Republic of China.
| | - Weidong Shi
- Department of Medical Oncology, the Second Peoples Hospital of Nan Tong, 43 Tangzha Xinglong Road, Nantong 226002, Jiangsu Province, People's Republic of China.
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19
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Kim D, Ntui VO, Zhang N, Xiong L. Arabidopsis Yak1 protein (AtYak1) is a dual specificity protein kinase. FEBS Lett 2015; 589:3321-7. [PMID: 26452715 DOI: 10.1016/j.febslet.2015.09.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2015] [Revised: 09/08/2015] [Accepted: 09/24/2015] [Indexed: 11/16/2022]
Abstract
Yak1 is a member of dual-specificity Tyr phosphorylation-regulated kinases (DYRKs) that are evolutionarily conserved. The downstream targets of Yak1 and their functions are largely unknown. Here, a homologous protein AtYAK1 was identified in Arabidopsis thaliana and the phosphoprotein profiles of the wild type and an atyak1 mutant were compared on two-dimensional gel following Pro-Q Diamond phosphoprotein gel staining. Annexin1, Annexin2 and RBD were phosphorylated at serine/threonine residues by the AtYak1 kinase. Annexin1, Annexin2 and Annexin4 were also phosphorylated at tyrosine residues. Our study demonstrated that AtYak1 is a dual specificity protein kinase in Arabidopsis that may regulate the phosphorylation status of the annexin family proteins.
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Affiliation(s)
- Dongjin Kim
- Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), 23955-6900 Thuwal, Saudi Arabia; Center for Desert Agriculture, Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), 23955-6900 Thuwal, Saudi Arabia.
| | - Valentine Otang Ntui
- Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), 23955-6900 Thuwal, Saudi Arabia; Center for Desert Agriculture, Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), 23955-6900 Thuwal, Saudi Arabia
| | - Nianshu Zhang
- Cambridge Systems Biology Centre, Department of Biochemistry, The Sanger Building, Tennis Court Road, Cambridge CB2 1GA, UK
| | - Liming Xiong
- Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), 23955-6900 Thuwal, Saudi Arabia.
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20
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Liu YC, Chang PY, Chao CCK. CITED2 silencing sensitizes cancer cells to cisplatin by inhibiting p53 trans-activation and chromatin relaxation on the ERCC1 DNA repair gene. Nucleic Acids Res 2015; 43:10760-81. [PMID: 26384430 PMCID: PMC4678856 DOI: 10.1093/nar/gkv934] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 09/08/2015] [Indexed: 02/07/2023] Open
Abstract
In this study, we show that silencing of CITED2 using small-hairpin RNA (shCITED2) induced DNA damage and reduction of ERCC1 gene expression in HEK293, HeLa and H1299 cells, even in the absence of cisplatin. In contrast, ectopic expression of ERCC1 significantly reduced intrinsic and induced DNA damage levels, and rescued the effects of CITED2 silencing on cell viability. The effects of CITED2 silencing on DNA repair and cell death were associated with p53 activity. Furthermore, CITED2 silencing caused severe elimination of the p300 protein and markers of relaxed chromatin (acetylated H3 and H4, i.e. H3K9Ac and H3K14Ac) in HEK293 cells. Chromatin immunoprecipitation assays further revealed that DNA damage induced binding of p53 along with H3K9Ac or H3K14Ac at the ERCC1 promoter, an effect which was almost entirely abrogated by silencing of CITED2 or p300. Moreover, lentivirus-based CITED2 silencing sensitized HeLa cell line-derived tumor xenografts to cisplatin in immune-deficient mice. These results demonstrate that CITED2/p300 can be recruited by p53 at the promoter of the repair gene ERCC1 in response to cisplatin-induced DNA damage. The CITED2/p300/p53/ERCC1 pathway is thus involved in the cell response to cisplatin and represents a potential target for cancer therapy.
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Affiliation(s)
- Yu-Chin Liu
- Tumor Biology Laboratory, Department of Biochemistry and Molecular Biology, Chang Gung University, 259 Wen-Hua first Road, Gueishan, Taoyuan 333, Taiwan, Republic of China Graduate Institute of Biomedical Sciences, Chang Gung University, 259 Wen-Hua first Road, Gueishan,Taoyuan 333, Taiwan, Republic of China
| | - Pu-Yuan Chang
- Tumor Biology Laboratory, Department of Biochemistry and Molecular Biology, Chang Gung University, 259 Wen-Hua first Road, Gueishan, Taoyuan 333, Taiwan, Republic of China
| | - Chuck C-K Chao
- Tumor Biology Laboratory, Department of Biochemistry and Molecular Biology, Chang Gung University, 259 Wen-Hua first Road, Gueishan, Taoyuan 333, Taiwan, Republic of China Graduate Institute of Biomedical Sciences, Chang Gung University, 259 Wen-Hua first Road, Gueishan,Taoyuan 333, Taiwan, Republic of China
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21
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Zhang L, Tong X, Zhang J, Huang J, Wang J. DAW22, a natural sesquiterpene coumarin isolated from Ferula ferulaeoides (Steud.) Korov. that induces C6 glioma cell apoptosis and endoplasmic reticulum (ER) stress. Fitoterapia 2015; 103:46-54. [DOI: 10.1016/j.fitote.2015.03.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 03/08/2015] [Accepted: 03/09/2015] [Indexed: 12/27/2022]
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22
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Abstract
Currently, Dual Specificity YAK1-Related Kinases (MNB/DYRK) were found in slime molds, protista, fungi, and animals, but the existence of plant homologues is still unclear. In the present study, we have identified 14 potential plant homologues with the previously unknown functions, based on the strong sequence similarity. The results of bioinformatics analysis revealed their correspondence to DYRK1A, DYRK1B, DYRK3, and DYRK4. For two plant homologues of animal DYRK1A from Physcomitrella patens and Arabidopsis thaliana spatial structures of catalytic domains were predicted, as well as their complexes with ADP and selective inhibitor d15. Comparative analysis of 3D-structures of the human DYRK1A and plant homologues, their complexes with the specific inhibitors, and results of molecular dynamics confirm their structural and functional similarity with high probability. Preliminary data indicate the presence of potential MNB/DYRK specific phosphorylation sites in such proteins associated with plant cytoskeleton as plant microtubule-associated proteins WVD2 and WDL1, and FH5 and SCAR2 involved in the organization and polarity of the actin cytoskeleton and some kinesin-like microtubule motor proteins.
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23
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Enomoto Y, Yamashita SI, Yoshinaga Y, Fukami Y, Miyahara S, Nabeshima K, Iwasaki A. Downregulation of DYRK2 can be a predictor of recurrence in early stage breast cancer. Tumour Biol 2014; 35:11021-5. [PMID: 25095982 DOI: 10.1007/s13277-014-2413-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 07/28/2014] [Indexed: 01/08/2023] Open
Abstract
This study investigated the potential of DYRK2, a dual-specificity tyrosine-(Y)-phosphorylation-regulated kinase gene, to predict disease-free survival for patients with early stage breast cancer. Two hundred and seventy-four patients with breast cancer underwent surgery from January 2000 to December 2009. All patients were in stage I or II. Immunohistochemical (IHC) analysis was used to determine the expression of DYRK2, which was examined for its association with clinicopathological factors or prognosis. A total of 85 of 274 cases (31%) were DYRK2 positive. No correlation was found between DYRK2 expression by IHC and clinicopathological factors such as tumor size, histological grade, hormone receptor status, and HER2 status; however, lymph node involvement was closely associated with DYRK2 expression. Ten-year disease-free survival in the DYRK2-positive group without node metastasis (95.9%) was significantly better than that in the DYRK2-negative group (87.3%, p = 0.015). These data show that DYRK2 expression is associated with lymph node involvement and is a possible predictive factor of breast cancer recurrence.
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MESH Headings
- Biomarkers, Tumor/metabolism
- Breast Neoplasms/metabolism
- Breast Neoplasms/mortality
- Breast Neoplasms/pathology
- Carcinoma, Ductal, Breast/metabolism
- Carcinoma, Ductal, Breast/mortality
- Carcinoma, Ductal, Breast/secondary
- Carcinoma, Lobular/metabolism
- Carcinoma, Lobular/mortality
- Carcinoma, Lobular/secondary
- Down-Regulation
- Female
- Follow-Up Studies
- Humans
- Immunoenzyme Techniques
- Lymphatic Metastasis
- Neoplasm Grading
- Neoplasm Recurrence, Local/diagnosis
- Neoplasm Recurrence, Local/metabolism
- Neoplasm Recurrence, Local/mortality
- Neoplasm Staging
- Prognosis
- Protein Serine-Threonine Kinases/metabolism
- Protein-Tyrosine Kinases/metabolism
- Receptor, ErbB-2/metabolism
- Receptors, Estrogen/metabolism
- Receptors, Progesterone/metabolism
- Survival Rate
- Dyrk Kinases
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Affiliation(s)
- Yasuko Enomoto
- Department of General Thoracic, Breast, and Pediatric Surgery, Faculty of Medicine, Fukuoka University, 7-45-1 Nanakuma, Jonanku, Fukuoka, 814-0180, Japan
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24
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Hall AP, Escott KJ, Sanganee H, Hickling KC. Preclinical toxicity of AZD7969: Effects of GSK3β inhibition in adult stem cells. Toxicol Pathol 2014; 43:384-99. [PMID: 25326587 DOI: 10.1177/0192623314544468] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AZD7969 is a potent inhibitor of glycogen synthase kinase 3 (GSK3β), which is a multifunctional serine/threonine kinase that negatively regulates the Wnt/β-catenin signaling pathway. Treatment of rats and dogs with AZD7969 for periods of up to 4 weeks resulted in a number of changes, the most significant of which was a dose-dependent, and treatment-related, increase in proliferation in a number of tissues that was thought to arise from derepression of Wnt/β-catenin signaling in the stem cell compartment. Phenotypically, this resulted in hyperplasia that either maintained normal tissue architecture in the gastrointestinal tract, liver, kidney, and adrenals or effaced normal tissue architecture within the bones, incisor teeth, and femorotibial joint. In addition to these changes, we noted a treatment-related increase in iron loading in the liver and proximal small intestines. This off-target effect was robust, potent, and occurred in both dogs and rats suggesting that AZD7969 might be a useful tool compound to study iron storage disorders in the laboratory.
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Affiliation(s)
- A P Hall
- Drug Safety & Metabolism Innovative Medicines, Macclesfield, Cheshire, England
| | - K J Escott
- Emerging Innovations, Scientific Partnering & Alliances, Macclesfield, Cheshire, England
| | - H Sanganee
- Emerging Innovations, Scientific Partnering & Alliances, Macclesfield, Cheshire, England
| | - K C Hickling
- Drug Safety & Metabolism Innovative Medicines, Macclesfield, Cheshire, England
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25
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Eskildsen TV, Schneider M, Sandberg MB, Skov V, Brønnum H, Thomassen M, Kruse TA, Andersen DC, Sheikh SP. The microRNA-132/212 family fine-tunes multiple targets in Angiotensin II signalling in cardiac fibroblasts. J Renin Angiotensin Aldosterone Syst 2014; 16:1288-97. [PMID: 25031299 DOI: 10.1177/1470320314539367] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
INTRODUCTION MicroRNAs (miRNAs) are emerging as key regulators of cardiovascular development and disease; however, the cardiac miRNA target molecules are not well understood. We and others have described the Angiotensin II (AngII)-induced miR-132/212 family as novel regulators of cardiovascular function including regulation of cardiac hypertrophy, heart failure and blood pressure possibly through AT1R signalling. However, the miR-132/212 targets in the heart remain unknown. MATERIALS AND METHODS To understand the role of these miRNAs in cardiac signalling networks, we undertook comprehensive in silico and in vitro experiments to identify miR-132/212 molecular targets in primary rat cardiac fibroblasts. RESULTS MiR-132/212 overexpression increased fibroblast cell size and mRNA arrays detected several hundred genes that were differentially expressed, including a wide panel of receptors, signalling molecules and transcription factors. Subsequent comprehensive in silico analysis identified 24 target genes, of which 22 genes were qPCR validated. We identified seven genes involved in AngII signalling pathways. CONCLUSION We here report novel insight of an extensive network of molecular pathways that fine-tuned by miR-132/212, suggesting a role for this miRNA family as master signalling switches in cardiac fibroblasts. Our data underscore the potential for miRNA tools to manipulate a large array of molecules and thereby control biological function.
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Affiliation(s)
- Tilde V Eskildsen
- Department of Cardiovascular and Renal Research, University of Southern Denmark, Denmark Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Denmark
| | - Mikael Schneider
- Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Denmark
| | - Maria B Sandberg
- Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Denmark
| | - Vibe Skov
- Department of Clinical Genetics, Odense University Hospital, Denmark
| | - Hasse Brønnum
- Department of Cardiovascular and Renal Research, University of Southern Denmark, Denmark Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Denmark
| | - Mads Thomassen
- Department of Clinical Genetics, Odense University Hospital, Denmark
| | - Torben A Kruse
- Department of Clinical Genetics, Odense University Hospital, Denmark
| | - Ditte C Andersen
- Department of Cardiovascular and Renal Research, University of Southern Denmark, Denmark Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Denmark
| | - Søren P Sheikh
- Department of Cardiovascular and Renal Research, University of Southern Denmark, Denmark Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, Denmark
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26
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Liu Q, Liu N, Zang S, Liu H, Wang P, Ji C, Sun X. Tumor suppressor DYRK1A effects on proliferation and chemoresistance of AML cells by downregulating c-Myc. PLoS One 2014; 9:e98853. [PMID: 24901999 PMCID: PMC4047119 DOI: 10.1371/journal.pone.0098853] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 05/07/2014] [Indexed: 01/12/2023] Open
Abstract
Acute myeloid leukemia (AML), caused by abnormal proliferation and accumulation of hematopoietic progenitor cells, is one of the most common malignancies in adults. We reported here DYRK1A expression level was reduced in the bone marrow of adult AML patients, comparing to normal controls. Overexpression of DYRK1A inhibited the proliferation of AML cell lines by increasing the proportion of cells undergoing G0/G1 phase. We reasoned that the proliferative inhibition was due to downregulation of c-Myc by DYRK1A, through mediating its degradation. Moreover, overexpression of c-Myc markedly reversed AML cell growth inhibition induced by DYRK1A. DYRK1A also had significantly lower expression in relapsed/refractory AML patients, comparing to newly-diagnosed AML patients, which indicated the role of DYRK1A in chemoresistance of AML. Our study provided functional evidences for DYRK1A as a potential tumor suppressor in AML.
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MESH Headings
- Adolescent
- Adult
- Aged
- Cell Cycle/genetics
- Cell Line, Tumor
- Cell Proliferation
- Down-Regulation
- Drug Resistance, Neoplasm/genetics
- Female
- Gene Expression Regulation, Leukemic
- Humans
- Leukemia, Myeloid, Acute/diagnosis
- Leukemia, Myeloid, Acute/drug therapy
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/metabolism
- Male
- Middle Aged
- Protein Serine-Threonine Kinases/metabolism
- Protein-Tyrosine Kinases/metabolism
- Proto-Oncogene Proteins c-myc/genetics
- Recurrence
- Young Adult
- Dyrk Kinases
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Affiliation(s)
- Qiang Liu
- Key Lab of Otolaryngology, Qilu Hospital of Shandong University, Jinan, China
| | - Na Liu
- Department of Hematology, Qilu Hospital of Shandong University, Jinan, China
| | - Shaolei Zang
- Department of Hematology, Qilu Hospital of Shandong University, Jinan, China
| | - Heng Liu
- Key Lab of Otolaryngology, Qilu Hospital of Shandong University, Jinan, China
| | - Pin Wang
- Key Lab of Otolaryngology, Qilu Hospital of Shandong University, Jinan, China
| | - Chunyan Ji
- Department of Hematology, Qilu Hospital of Shandong University, Jinan, China
| | - Xiulian Sun
- Key Lab of Otolaryngology, Qilu Hospital of Shandong University, Jinan, China
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27
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Induction of amphiregulin by p53 promotes apoptosis via control of microRNA biogenesis in response to DNA damage. Proc Natl Acad Sci U S A 2013; 111:717-22. [PMID: 24379358 DOI: 10.1073/pnas.1313675111] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Upon DNA damage, tumor suppressor p53 determines cell fate by repairing DNA lesions to survive or by inducing apoptosis to eliminate damaged cells. The decision is based on its posttranslational modifications. Especially, p53 phosphorylation at Ser46 exerts apoptotic cell death. However, little is known about the precise mechanism of p53 phosphorylation on the induction of apoptosis. Here, we show that amphiregulin (AREG) is identified for a direct target of Ser46 phosphorylation via the comprehensive expression analyses. Ser46-phosphorylated p53 selectively binds to the promoter region of AREG gene, indicating that the p53 modification changes target genes by altering its binding affinity to the promoter. Although AREG belongs to a family of the epidermal growth factor, it also emerges in the nucleus under DNA damage. To clarify nuclear function of AREG, we analyze AREG-binding proteins by mass spectrometry. AREG interacts with DEAD-box RNA helicase p68 (DDX5). Intriguingly, AREG regulates precursor microRNA processing (i.e., miR-15a) with DDX5 to reduce the expression of antiapoptotic protein Bcl-2. These findings collectively support a mechanism in which the induction of AREG by Ser46-phosphorylated p53 is required for the microRNA biogenesis in the apoptotic response to DNA damage.
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28
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Anderson K, Chen Y, Chen Z, Dominique R, Glenn K, He Y, Janson C, Luk KC, Lukacs C, Polonskaia A, Qiao Q, Railkar A, Rossman P, Sun H, Xiang Q, Vilenchik M, Wovkulich P, Zhang X. Pyrido[2,3-d]pyrimidines: discovery and preliminary SAR of a novel series of DYRK1B and DYRK1A inhibitors. Bioorg Med Chem Lett 2013; 23:6610-5. [PMID: 24239188 DOI: 10.1016/j.bmcl.2013.10.055] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 10/23/2013] [Accepted: 10/25/2013] [Indexed: 02/05/2023]
Abstract
DYRK1B is a kinase over-expressed in certain cancer cells (including colon, ovarian, pancreatic, etc.). Recent publications have demonstrated inhibition of DYRK1B could be an attractive target for cancer therapy. From a data-mining effort, the team has discovered analogues of pyrido[2,3-d]pyrimidines as potent enantio-selective inhibitors of DYRK1B. Cells treated with a tool compound from this series showed the same cellular effects as down regulation of DYRK1B with siRNA. Such effects are consistent with the proposed mechanism of action. Progress of the SAR study is presented.
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Affiliation(s)
- Kevin Anderson
- Discovery Chemistry, Hoffmann-La Roche Inc., pRED, Pharma Research & Early Development, 340 Kingsland Street, Nutley, NJ 07110, USA
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29
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Miersch S, Bian X, Wallstrom G, Sibani S, Logvinenko T, Wasserfall CH, Schatz D, Atkinson M, Qiu J, LaBaer J. Serological autoantibody profiling of type 1 diabetes by protein arrays. J Proteomics 2013; 94:486-96. [PMID: 24148850 DOI: 10.1016/j.jprot.2013.10.018] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 09/04/2013] [Accepted: 10/01/2013] [Indexed: 12/30/2022]
Abstract
The need for biomarkers that illuminate the pathophysiology of type 1 diabetes (T1D), enhance early diagnosis and provide additional avenues for therapeutic intervention is well recognized in the scientific community. We conducted a proteome-scale, two-stage serological AAb screening followed by an independent validation study. In the first stage, the immunoreactivity was compared between T1D cases and healthy controls against ~6000 human proteins using the nucleic acid programmable protein array (NAPPA). Genes identified with higher signal intensities in patients were challenged with a larger sample set during the second stage. Statistical analysis revealed 26 novel autoantigens and a known T1D-associated autoantigen. During validation, we verified the presence of AAbs to dual specificity tyrosine-phosphorylation-regulated kinase 2 (DYRK2) using the Luciferase ImmunoPrecipitation System (LIPS) assay (36% sensitivity, 98% specificity). The AUC for a combination of DYRK2A and the classical T1D AAb IA-2A was 0.90 compared to 0.72 for DYRK2A and 0.64 for IA-2A alone. This is the first systematic screening for seroreactivity against a large number of human proteins in T1D patients. We demonstrated the application of protein microarrays to identify novel autoantigens in T1D, expanded the current T1D "autoantigenome" and help fulfill the goal of searching for novel biomarker candidates for T1D. BIOLOGICAL SIGNIFICANCE Protein microarrays provide a high-throughput platform that enables the profiling of serum antibodies to a large number of protein antigens. The value of AAb biomarkers in diagnosis, prognosis and treatment is well recognized in autoimmune diseases including T1D. We performed a systematic screening for new T1D-associated autoantigens by adapting the innovative protein array platform NAPPA. We believe that the discovery in this study will add information on candidate autoantigens that could potentially improve the diagnosis and help uncover the pathophysiology of T1D. The successful use of NAPPA for T1D AAb profiling will open the window for larger studies including more human antigen genes and other autoimmune diseases.
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Affiliation(s)
- Shane Miersch
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, ON, Canada
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30
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Mimoto R, Taira N, Takahashi H, Yamaguchi T, Okabe M, Uchida K, Miki Y, Yoshida K. DYRK2 controls the epithelial-mesenchymal transition in breast cancer by degrading Snail. Cancer Lett 2013; 339:214-25. [PMID: 23791882 DOI: 10.1016/j.canlet.2013.06.005] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 05/30/2013] [Accepted: 06/02/2013] [Indexed: 01/22/2023]
Abstract
The epithelial-mesenchymal transition (EMT) plays a fundamental role in the early stages of breast cancer invasion. Snail, a zinc finger transcriptional repressor, is an important regulator of EMT. Snail is phosphorylated by GSK3β and is subsequently degraded by βTrCP-mediated ubiquitination. We identified an additional kinase, DYRK2, that regulates Snail stability. Knockdown of DYRK2 promoted EMT and cancer invasion in vitro and in vivo. Consistent with these results, DYRK2 was found to be down-regulated in human breast cancer tissue. Patients with low DYRK2-expressing tumors had a worse outcome than those with high DYRK2-expressing tumors. These findings revealed that DYRK2 regulates cancer invasion and metastasis by degrading Snail.
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Affiliation(s)
- Rei Mimoto
- Department of Biochemistry, The Jikei University School of Medicine, Tokyo, Japan; Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan; Department of Anatomy, The Jikei University School of Medicine, Tokyo, Japan
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31
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32
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Coombs TC, Tanega C, Shen M, Wang JL, Auld DS, Gerritz SW, Schoenen FJ, Thomas CJ, Aubé J. Small-molecule pyrimidine inhibitors of the cdc2-like (Clk) and dual specificity tyrosine phosphorylation-regulated (Dyrk) kinases: development of chemical probe ML315. Bioorg Med Chem Lett 2013; 23:3654-61. [PMID: 23642479 PMCID: PMC3664191 DOI: 10.1016/j.bmcl.2013.02.096] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Accepted: 02/21/2013] [Indexed: 01/17/2023]
Abstract
Substituted pyrimidine inhibitors of the Clk and Dyrk kinases have been developed, exploring structure-activity relationships around four different chemotypes. The most potent compounds have low-nanomolar inhibitory activity against Clk1, Clk2, Clk4, Dyrk1A and Dyrk1B. Kinome scans with 442 kinases using agents representing three of the chemotypes show these inhibitors to be highly selective for the Clk and Dyrk families. Further off-target pharmacological evaluation with ML315, the most selective agent, supports this conclusion.
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Affiliation(s)
- Thomas C Coombs
- University of Kansas Specialized Chemistry Center, University of Kansas, Lawrence, KS 66047, USA
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33
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Soundararajan M, Roos A, Savitsky P, Filippakopoulos P, Kettenbach A, Olsen J, Gerber S, Eswaran J, Knapp S, Elkins J. Structures of Down syndrome kinases, DYRKs, reveal mechanisms of kinase activation and substrate recognition. Structure 2013; 21:986-96. [PMID: 23665168 PMCID: PMC3677093 DOI: 10.1016/j.str.2013.03.012] [Citation(s) in RCA: 112] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Revised: 02/28/2013] [Accepted: 03/19/2013] [Indexed: 01/16/2023]
Abstract
Dual-specificity tyrosine-(Y)-phosphorylation-regulated kinases (DYRKs) play key roles in brain development, regulation of splicing, and apoptosis, and are potential drug targets for neurodegenerative diseases and cancer. We present crystal structures of one representative member of each DYRK subfamily: DYRK1A with an ATP-mimetic inhibitor and consensus peptide, and DYRK2 including NAPA and DH (DYRK homology) box regions. The current activation model suggests that DYRKs are Ser/Thr kinases that only autophosphorylate the second tyrosine of the activation loop YxY motif during protein translation. The structures explain the roles of this tyrosine and of the DH box in DYRK activation and provide a structural model for DYRK substrate recognition. Phosphorylation of a library of naturally occurring peptides identified substrate motifs that lack proline in the P+1 position, suggesting that DYRK1A is not a strictly proline-directed kinase. Our data also show that DYRK1A wild-type and Y321F mutant retain tyrosine autophosphorylation activity.
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Affiliation(s)
- Meera Soundararajan
- Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Old Road Campus, Roosevelt Drive, Oxford OX3 7DQ, UK
| | - Annette K. Roos
- Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Old Road Campus, Roosevelt Drive, Oxford OX3 7DQ, UK
| | - Pavel Savitsky
- Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Old Road Campus, Roosevelt Drive, Oxford OX3 7DQ, UK
| | - Panagis Filippakopoulos
- Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Old Road Campus, Roosevelt Drive, Oxford OX3 7DQ, UK
| | - Arminja N. Kettenbach
- Department of Genetics, Geisel School of Medicine at Dartmouth, Lebanon, NH 03756, USA
| | - Jesper V. Olsen
- Department of Proteomics, Novo Nordisk Foundation Center for Protein Research, Copenhagen DK-2200, Denmark
| | - Scott A. Gerber
- Department of Genetics, Geisel School of Medicine at Dartmouth, Lebanon, NH 03756, USA
- Department of Biochemistry, Geisel School of Medicine at Dartmouth, Lebanon, NH 03756, USA
| | - Jeyanthy Eswaran
- Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Old Road Campus, Roosevelt Drive, Oxford OX3 7DQ, UK
| | - Stefan Knapp
- Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Old Road Campus, Roosevelt Drive, Oxford OX3 7DQ, UK
- Target Discovery Institute, Nuffield Department of Clinical Medicine, University of Oxford, Old Road Campus, Roosevelt Drive, Oxford OX3 7DQ, UK
| | - Jonathan M. Elkins
- Structural Genomics Consortium, Nuffield Department of Clinical Medicine, University of Oxford, Old Road Campus, Roosevelt Drive, Oxford OX3 7DQ, UK
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Li X, Wang M, Jiang JX, Tian R, Shi CJ, Qin RY. Clinical significance of expression of DYRK2 in pancreatic cancer. Shijie Huaren Xiaohua Zazhi 2013; 21:1442-1447. [DOI: 10.11569/wcjd.v21.i15.1442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the expression of dual-specificity tyrosine phosphorylation-regulated kinase 2 (DYRK2) in human pancreatic cancer and to analyze its clinical significance.
METHODS: The expression of DYRK2 mRNA and protein in 40 human pancreatic cancer tissue samples and matched tumor-adjacent normal tissue samples were detected by real-time quantitative PCR, Western blot and immunohistochemistry. The relationship between DYRK2 expression and clinicopathologic characteristics of pancreatic cancer was then analyzed.
RESULTS: The expression of DYRK2 mRNA in pancreatic cancer was significantly lower than that in tumor-adjacent pancreatic tissue (P < 0.01). The expression of DYRK2 protein in 88.9% of pancreatic cancer tissue samples was lower than that in tumor-adjacent pancreatic tissue samples. The proportion of DYRK2-positive cells in pancreatic cancer was significantly lower than that in tumor-adjacent pancreatic tissue (42.5% vs 87.5%, χ2 = 17.802, P < 0.01). The expression of DYRK2 had a significant correlation with lymph node metastasis (χ2 = 6.32, P < 0.05), but not with other clinicopathologic characteristics.
CONCLUSION: The expression of DYRK2 is down-regulated in pancreatic cancer, and DYRK2 may be involved in the carcinogenesis, development and lymph node metastasis of this malignancy.
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Becker W. Emerging role of DYRK family protein kinases as regulators of protein stability in cell cycle control. Cell Cycle 2012; 11:3389-94. [PMID: 22918246 PMCID: PMC3466549 DOI: 10.4161/cc.21404] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Dual-specificity tyrosine phosphorylation-regulated kinases (DYRKs) constitute an evolutionarily conserved family of protein kinases with key roles in the control of cell proliferation and differentiation. Members of the DYRK family phosphorylate many substrates, including critical regulators of the cell cycle. A recent report revealed that human DYRK2 acts as a negative regulator of G1/S transition by phosphorylating c-Jun and c-Myc, thereby inducing ubiquitination-mediated degradation. Other DYRKs also function as cell cycle regulators by modulating the turnover of their target proteins. DYRK1B can induce reversible cell arrest in a quiescent G0 state by targeting cyclin D1 for proteasomal degradation and stabilizing p27 (Kip1). The DYRK2 ortholog of C. elegans, MBK-2, triggers the proteasomal destruction of oocyte proteins after meiosis to allow the mitotic divisions in embryo development. This review summarizes the accumulating results that provide evidence for a general role of DYRKs in the regulation of protein stability.
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Affiliation(s)
- Walter Becker
- Institute of Pharmacology and Toxicology, Medical Faculty of the RWTH Aachen University, Aachen, Germany.
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Taira N, Mimoto R, Kurata M, Yamaguchi T, Kitagawa M, Miki Y, Yoshida K. DYRK2 priming phosphorylation of c-Jun and c-Myc modulates cell cycle progression in human cancer cells. J Clin Invest 2012; 122:859-72. [PMID: 22307329 PMCID: PMC3287383 DOI: 10.1172/jci60818] [Citation(s) in RCA: 102] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Accepted: 12/21/2011] [Indexed: 02/06/2023] Open
Abstract
Dysregulation of the G(1)/S transition in the cell cycle contributes to tumor development. The oncogenic transcription factors c-Jun and c-Myc are indispensable regulators at this transition, and their aberrant expression is associated with many malignancies. Degradation of c-Jun/c-Myc is a critical process for the G(1)/S transition, which is initiated upon phosphorylation by glycogen synthase kinase 3 β (GSK3β). However, a specific kinase or kinases responsible for priming phosphorylation events that precede this GSK3β modification has not been definitively identified. Here, we found that the dual-specificity tyrosine phosphorylation-regulated kinase DYRK2 functions as a priming kinase of c-Jun and c-Myc. Knockdown of DYRK2 in human cancer cells shortened the G(1) phase and accelerated cell proliferation due to escape of c-Jun and c-Myc from ubiquitination-mediated degradation. In concert with these results, silencing DYRK2 increased cell proliferation in human cancer cells, and this promotion was completely impeded by codeprivation of c-Jun or c-Myc in vivo. We also found marked attenuation of DYRK2 expression in multiple human tumor samples. Downregulation of DYRK2 correlated with high levels of unphosphorylated c-Jun and c-Myc and, importantly, with invasiveness of human breast cancers. These results reveal that DYRK2 regulates tumor progression through modulation of c-Jun and c-Myc.
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Affiliation(s)
- Naoe Taira
- Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan.
Department of Comprehensive Pathology, Aging and Developmental Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Rei Mimoto
- Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan.
Department of Comprehensive Pathology, Aging and Developmental Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Morito Kurata
- Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan.
Department of Comprehensive Pathology, Aging and Developmental Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Tomoko Yamaguchi
- Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan.
Department of Comprehensive Pathology, Aging and Developmental Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Masanobu Kitagawa
- Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan.
Department of Comprehensive Pathology, Aging and Developmental Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Yoshio Miki
- Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan.
Department of Comprehensive Pathology, Aging and Developmental Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
| | - Kiyotsugu Yoshida
- Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan.
Department of Comprehensive Pathology, Aging and Developmental Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
Department of Surgery, The Jikei University School of Medicine, Tokyo, Japan
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Wu P, Zhao R, Ye Y, Wu JQ. Roles of the DYRK kinase Pom2 in cytokinesis, mitochondrial morphology, and sporulation in fission yeast. PLoS One 2011; 6:e28000. [PMID: 22174761 PMCID: PMC3236194 DOI: 10.1371/journal.pone.0028000] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Accepted: 10/29/2011] [Indexed: 01/04/2023] Open
Abstract
Pom2 is predicted to be a dual-specificity tyrosine-phosphorylation regulated kinase (DYRK) related to Pom1 in Schizosaccharomyces pombe. DYRKs share a kinase domain capable of catalyzing autophosphorylation on tyrosine and exogenous phosphorylation on serine/threonine residues. Here we show that Pom2 is functionally different from the well-characterized Pom1, although they share 55% identity in the kinase domain and the Pom2 kinase domain functionally complements that of Pom1. Pom2 localizes to mitochondria throughout the cell cycle and to the contractile ring during late stages of cytokinesis. Overexpression but not deletion of pom2 results in severe defects in cytokinesis, indicating that Pom2 might share an overlapping function with other proteins in regulating cytokinesis. Gain and loss of function analyses reveal that Pom2 is required for maintaining mitochondrial morphology independently of microtubules. Intriguingly, most meiotic pom2Δ cells form aberrant asci with meiotic and/or forespore membrane formation defects. Taken together, Pom2 is a novel DYRK kinase involved in regulating cytokinesis, mitochondrial morphology, meiosis, and sporulation in fission yeast.
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Affiliation(s)
- Pengcheng Wu
- Department of Molecular Genetics, The Ohio State University, Columbus, Ohio, United States of America.
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38
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Wu ZZ, Sun NK, Chao CCK. Knockdown of CITED2 using short-hairpin RNA sensitizes cancer cells to cisplatin through stabilization of p53 and enhancement of p53-dependent apoptosis. J Cell Physiol 2011; 226:2415-28. [PMID: 21660965 DOI: 10.1002/jcp.22589] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
CITED2 is a transcriptional modulator which has been implicated in human oncogenesis. In the present study, we examined whether CITED2 is also involved in the resistance of cancer cells to the chemotherapeutic drug cisplatin. We first observed that knockdown of CITED2 using short-hairpin RNA sensitized non-tumorigenic HEK293 cells to cisplatin. Sensitization to cisplatin following knockdown of CITED2 was also observed in cervical carcinoma HeLa cells and in cisplatin-resistant HeLa cells, thereby showing that acquired cisplatin resistance could be reversed by CITED2 knockdown. This sensitization response was dependent on the status of p53 since efficient sensitization was observed in p53-positive hepatocellular carcinoma (HCC) Sk-Hep-1 cells, whereas a negligible response was produced in the two p53-defective cell lines HCC Mahlavu and lung cancer H1299. In contrast, overexpression of CITED2 decreased sensitivity of HEK293 cells to cisplatin, while moderate resistance was produced in HeLa cells. Overexpression of CITED2 also decreased sensitivity to cisplatin in p53-defective H1299 cells when exogenous p53 expression was re-introduced. We observed that knockdown of CITED2-induced CBP/p300-mediated p53 acetylation (Lys373) in HEK293 cells, thereby leading to a decrease of p53 ubiquitination and subsequent accumulation of the p53 protein. Notably, the effects of CITED2 knockdown on p53 accumulation and the increase of p53's target Bax were more pronounced after treatment with cisplatin. Based on these results, we propose that a combination of cisplatin and CITED2 shRNA may represent an effective treatment against p53-sensitive cancer cells.
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Affiliation(s)
- Zchong-Zcho Wu
- Tumor Biology Laboratory, Department of Biochemistry and Molecular Biology, Chang Gung University, Gueishan, Taoyuan, Taiwan, Republic of China
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Takeda K, Naguro I, Nishitoh H, Matsuzawa A, Ichijo H. Apoptosis signaling kinases: from stress response to health outcomes. Antioxid Redox Signal 2011; 15:719-61. [PMID: 20969480 DOI: 10.1089/ars.2010.3392] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Apoptosis is a highly regulated process essential for the development and homeostasis of multicellular organisms. Whereas caspases, a large family of intracellular cysteine proteases, play central roles in the execution of apoptosis, other proapoptotic and antiapoptotic regulators such as the members of the Bcl-2 family are also critically involved in the regulation of apoptosis. A large body of evidence has revealed that a number of protein kinases are among such regulators and regulate cellular sensitivity to various proapoptotic signals at multiple steps in apoptosis. However, recent progress in the analysis of these apoptosis signaling kinases demonstrates that they generally act as crucial regulators of diverse cellular responses to a wide variety of stressors, beyond their roles in apoptosis regulation. In this review, we have cataloged apoptosis signaling kinases involved in cellular stress responses on the basis of their ability to induce apoptosis and discuss their roles in stress responses with particular emphasis on health outcomes upon their dysregulation.
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Affiliation(s)
- Kohsuke Takeda
- Laboratory of Cell Signaling, Graduate School of Pharmaceutical Sciences, Strategic Approach to Drug Discovery and Development in Pharmaceutical Sciences, Global Center of Excellence Program and Core Research for Evolutional Science and Technology, Japan Science and Technology Corporation, The University of Tokyo, Tokyo, Japan.
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40
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Rosenthal AS, Tanega C, Shen M, Mott BT, Bougie JM, Nguyen DT, Misteli T, Auld DS, Maloney DJ, Thomas CJ. Potent and selective small molecule inhibitors of specific isoforms of Cdc2-like kinases (Clk) and dual specificity tyrosine-phosphorylation-regulated kinases (Dyrk). Bioorg Med Chem Lett 2011; 21:3152-8. [PMID: 21450467 PMCID: PMC3085634 DOI: 10.1016/j.bmcl.2011.02.114] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Revised: 02/24/2011] [Accepted: 02/28/2011] [Indexed: 11/22/2022]
Abstract
Continued examination of substituted 6-arylquinazolin-4-amines as Clk4 inhibitors resulted in selective inhibitors of Clk1, Clk4, Dyrk1A and Dyrk1B. Several of the most potent inhibitors were validated as being highly selective within a comprehensive kinome scan.
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Affiliation(s)
- Andrew S. Rosenthal
- NIH Chemical Genomics Center, National Human Genome Research Institute, NIH 9800 Medical Center Drive, MSC 3370 Bethesda, MD 20892-3370 USA
| | - Cordelle Tanega
- NIH Chemical Genomics Center, National Human Genome Research Institute, NIH 9800 Medical Center Drive, MSC 3370 Bethesda, MD 20892-3370 USA
| | - Min Shen
- NIH Chemical Genomics Center, National Human Genome Research Institute, NIH 9800 Medical Center Drive, MSC 3370 Bethesda, MD 20892-3370 USA
| | - Bryan T. Mott
- NIH Chemical Genomics Center, National Human Genome Research Institute, NIH 9800 Medical Center Drive, MSC 3370 Bethesda, MD 20892-3370 USA
| | - James M. Bougie
- NIH Chemical Genomics Center, National Human Genome Research Institute, NIH 9800 Medical Center Drive, MSC 3370 Bethesda, MD 20892-3370 USA
| | - Dac-Trung Nguyen
- NIH Chemical Genomics Center, National Human Genome Research Institute, NIH 9800 Medical Center Drive, MSC 3370 Bethesda, MD 20892-3370 USA
| | - Tom Misteli
- Cell Biology of Genomes, National Cancer Institute, NIH, 41 Library Drive, Bethesda, MD 20892 USA
| | - Douglas S. Auld
- NIH Chemical Genomics Center, National Human Genome Research Institute, NIH 9800 Medical Center Drive, MSC 3370 Bethesda, MD 20892-3370 USA
| | - David J. Maloney
- NIH Chemical Genomics Center, National Human Genome Research Institute, NIH 9800 Medical Center Drive, MSC 3370 Bethesda, MD 20892-3370 USA
| | - Craig J. Thomas
- NIH Chemical Genomics Center, National Human Genome Research Institute, NIH 9800 Medical Center Drive, MSC 3370 Bethesda, MD 20892-3370 USA
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41
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Spencer J, Amin J, Callear SK, Tizzard GJ, Coles SJ, Coxhead P, Guille M. Synthesis and evaluation of metallocene containing methylidene-1,3-dihydro-2H-indol-2-ones as kinase inhibitors. Metallomics 2011; 3:600-8. [PMID: 21359402 DOI: 10.1039/c1mt00017a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(E)- and (Z)-3-Ferrocenylmethylidene-1,3-dihydro-2H-indol-2-ones 1 have been structurally modified in order to explore SAR against a range of kinases. Of note is the submicromolar to low micromolar inhibition of DYRK3 and 4 by a number of complexes. Screening using Xenopus embryos showed some of the compounds to have potent antiangiogenisis activity.
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Affiliation(s)
- John Spencer
- School of Science, University of Greenwich at Medway, Central Avenue, Chatham, Kent, ME4 4TB, UK.
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42
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Yoshida K, Miki Y. The cell death machinery governed by the p53 tumor suppressor in response to DNA damage. Cancer Sci 2011. [DOI: 10.1111/j.1349-7006.2009.01488.x] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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43
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Vilela M, Morgan JJ, Lindahl PA. Mathematical model of a cell size checkpoint. PLoS Comput Biol 2010; 6:e1001036. [PMID: 21187911 PMCID: PMC3002998 DOI: 10.1371/journal.pcbi.1001036] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2010] [Accepted: 11/16/2010] [Indexed: 01/06/2023] Open
Abstract
How cells regulate their size from one generation to the next has remained an enigma for decades. Recently, a molecular mechanism that links cell size and cell cycle was proposed in fission yeast. This mechanism involves changes in the spatial cellular distribution of two proteins, Pom1 and Cdr2, as the cell grows. Pom1 inhibits Cdr2 while Cdr2 promotes the G2 → M transition. Cdr2 is localized in the middle cell region (midcell) whereas the concentration of Pom1 is highest at the cell tips and declines towards the midcell. In short cells, Pom1 efficiently inhibits Cdr2. However, as cells grow, the Pom1 concentration at midcell decreases such that Cdr2 becomes activated at some critical size. In this study, the chemistry of Pom1 and Cdr2 was modeled using a deterministic reaction-diffusion-convection system interacting with a deterministic model describing microtubule dynamics. Simulations mimicked experimental data from wild-type (WT) fission yeast growing at normal and reduced rates; they also mimicked the behavior of a Pom1 overexpression mutant and WT yeast exposed to a microtubule depolymerizing drug. A mechanism linking cell size and cell cycle, involving the downstream action of Cdr2 on Wee1 phosphorylation, is proposed. Cells delay division into two daughter cells until they reach a particular size. However, the molecular-level mechanisms by which they do this have remained unknown until recently. A cell-size checkpoint mechanism in rod-shaped fission yeast cells has recently been shown to involve two proteins, Pom1 and Cdr2. The concentrations of these proteins in the middle of the cell differ from that at the poles. The changing nature of these spatial gradients as the cell grows is size-sensitive. Pom1 inhibits Cdr2 while Cdr2 stimulates the cell to enter into mitosis. In short cells, the Pom1 concentration in the middle of the cell is so great that Cdr2 is inhibited. As cells grow, the Pom1 concentration in the middle of the cell declines; at some particular size, Cdr2 activates. In this study, we developed a mathematical model that mimics this checkpoint behavior.
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Affiliation(s)
- Marco Vilela
- Department of Chemistry, Texas A&M University, College Station, Texas, United States of America
| | - Jeffrey J. Morgan
- Department of Mathematics, University of Houston, Houston, Texas, United States of America
| | - Paul A. Lindahl
- Department of Chemistry, Texas A&M University, College Station, Texas, United States of America
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas, United States of America
- * E-mail:
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44
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Lee P, Paik SM, Shin CS, Huh WK, Hahn JS. Regulation of yeast Yak1 kinase by PKA and autophosphorylation-dependent 14-3-3 binding. Mol Microbiol 2010; 79:633-46. [PMID: 21255108 DOI: 10.1111/j.1365-2958.2010.07471.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Yak1 is a member of an evolutionarily conserved family of Ser/Thr protein kinases known as dual-specificity Tyr phosphorylation-regulated kinases (DYRKs). Yak1 was originally identified as a growth antagonist, which functions downstream of Ras/PKA signalling pathway. It has been known that Yak1 is phosphorylated by PKA in vitro and is translocated to the nucleus upon nutrient deprivation. However, the regulatory mechanisms for Yak1 activity and localization are largely unknown. In the present study, we investigated the role of PKA and Bmh1, a yeast 14-3-3 protein, in regulation of Yak1. We demonstrate that PKA-dependent phosphorylation of Yak1 on Ser295 and two minor sites inhibits nuclear localization of Yak1. We also show that intramolecular autophosphorylation on at least four Ser/Thr residues in the non-catalytic N-terminal domain is required for full kinase activity of Yak1. The most potent autophosphorylation site, Thr335, plays an essential role for Bmh1 binding in collaboration with a yet unidentified second binding site in the N-terminal domain. Bmh1 binding decreases the catalytic activity of Yak1 without affecting its subcellular localization. Since the binding of 14-3-3 proteins to Yak1 coincides with PKA activity, such regulatory mechanisms might allow cytoplasmic retention of an inactive form of Yak1 under high glucose conditions.
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Affiliation(s)
- Peter Lee
- School of Chemical and Biological Engineering Interdisciplinary Program for Bioengineering School of Biological Sciences, Seoul National University, 599 Gwanak-gu, Gwanak-ro, Seoul 151-744, Korea
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45
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Oxoby M, Moreau F, Durant L, Denis A, Genevard JM, Vongsouthi V, Escaich S, Gerusz V. Towards Gram-positive antivirulence drugs: new inhibitors of Streptococcus agalactiae Stk1. Bioorg Med Chem Lett 2010; 20:3486-90. [PMID: 20529681 DOI: 10.1016/j.bmcl.2010.04.150] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2010] [Accepted: 04/30/2010] [Indexed: 10/19/2022]
Abstract
A structure-activity relationship study from a screening hit and structure-based design strategy has led to the identification of bisarylureas as potent inhibitors of Streptococcus agalactiae Stk1. As this target has been directly linked to bacterial virulence, these inhibitors can be considered as a promising step towards antivirulence drugs.
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46
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Lilienthal E, Kolanowski K, Becker W. Development of a sensitive non-radioactive protein kinase assay and its application for detecting DYRK activity in Xenopus laevis oocytes. BMC BIOCHEMISTRY 2010; 11:20. [PMID: 20487523 PMCID: PMC2885986 DOI: 10.1186/1471-2091-11-20] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2009] [Accepted: 05/20/2010] [Indexed: 12/27/2022]
Abstract
BACKGROUND Although numerous non-radioactive methods are in use to measure the catalytic activity of protein kinases, most require specialized equipment and reagents and are not sufficiently sensitive for the detection of endogenous kinase activity in biological samples. Kinases of the DYRK family have important functions in developmental and pathophysiological processes in eukaryotic organisms including mammals. We aimed to develop a highly sensitive, low-tech assay suitable to determine the activity of DYRK family kinases in tissues or cells from diverse sources. RESULTS Phosphorylation-site specific antibodies can be used to monitor the accumulation of the phosphorylated product in kinase assays. We present a modified configuration of an enzyme-linked immunosorbent assay (ELISA)-based kinase assay by using the phosphospecific antibody as the capture antibody. This assay format allowed the detection of small amounts of phosphopeptide in mixtures with an excess of the unphosphorylated substrate peptide (10 fmol phosphorylated peptide over a background of 50 pmol unphosphorylated peptide). Consequently, low substrate turnover rates can be determined. We applied this method to the measurement of endogenous DYRK1A activity in mouse heart tissue by immunocomplex kinase assay. Furthermore, we detected DYRK1-like kinase activity in Xenopus laevis oocytes and identified this kinase as a DYRK1 isoform distinct from the Xenopus DYRK1A ortholog. CONCLUSION We present a non-radioactive and highly sensitive method for the measurement of endogenous activities of DYRKs in biological samples. Xenopus laevis oocytes contain an active DYRK1-related protein kinase more similar to mammalian DYRK1B than DYRK1A.
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Affiliation(s)
- Eva Lilienthal
- Institute of Pharmacology and Toxicology, Medical Faculty of the RWTH Aachen University, Wendlingweg 2, 52074 Aachen, Germany
| | - Katharina Kolanowski
- Institute of Pharmacology and Toxicology, Medical Faculty of the RWTH Aachen University, Wendlingweg 2, 52074 Aachen, Germany
| | - Walter Becker
- Institute of Pharmacology and Toxicology, Medical Faculty of the RWTH Aachen University, Wendlingweg 2, 52074 Aachen, Germany
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47
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Yoshida K, Miki Y. The cell death machinery governed by the p53 tumor suppressor in response to DNA damage. Cancer Sci 2010; 101:831-5. [PMID: 20132225 PMCID: PMC11158978 DOI: 10.1111/j.1349-7006.2010.01488.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The cellular response to genotoxic stress that damages DNA includes cell cycle arrest, activation of DNA repair, and in the event of irreparable damage, induction of apoptosis. However, the signals that determine cell fate, that is, survival or apoptosis, are largely unclear. The tumor suppressor p53 has been implicated in many important cellular processes, including regulation of apoptotic cell death. When cells encounter genotoxic stress, certain sensors for DNA lesions eventually stabilize and activate p53. Subsequently, p53 exerts its tumor suppressor function by transactivating numerous target genes. Active p53 is subjected to a complex and diverse array of covalent post-translational modifications, which selectively influence the expression of p53 target genes. In this regard, the molecular basis for how p53 induces apoptosis has been extensively studied; however, the relative contribution of each downstream effector is still to be explored. Moreover, little is known about precise mechanisms by which modified p53 is capable of apoptosis induction. A thorough understanding for the whole picture of p53 modification in apoptosis will be extremely valuable in the development of highly effective and specific therapies for cancer patients. This review is focused on the current views regarding the regulation of cell fate by p53 in the apoptotic response to DNA damage.
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Affiliation(s)
- Kiyotsugu Yoshida
- Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan.
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48
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Taira N, Yamamoto H, Yamaguchi T, Miki Y, Yoshida K. ATM augments nuclear stabilization of DYRK2 by inhibiting MDM2 in the apoptotic response to DNA damage. J Biol Chem 2010; 285:4909-19. [PMID: 19965871 PMCID: PMC2836095 DOI: 10.1074/jbc.m109.042341] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2009] [Revised: 12/02/2009] [Indexed: 11/06/2022] Open
Abstract
The tumor suppressor p53 is a transcription factor that regulates cell cycle, DNA repair, senescence, and apoptosis in response to DNA damage. Phosphorylation of p53 at Ser-46 is indispensable for the commitment to apoptotic cell death. A previous study has shown that upon exposure to genotoxic stress, DYRK2 translocates into the nucleus and phosphorylates p53 at Ser-46, thereby inducing apoptosis. However, less is known about mechanisms responsible for intracellular control of DYRK2. Here we show the functional nuclear localization signal at N-terminal domain of DYRK2. Under normal conditions, nuclear and not cytoplasmic DYRK2 is ubiquitinated by MDM2, resulting in its constitutive degradation. In the presence of proteasome inhibitors, we detected a stable complex of DYRK2 with MDM2 at the nucleus. Upon exposure to genotoxic stress, ATM phosphorylates DYRK2 at Thr-33 and Ser-369, which enables DYRK2 to escape from degradation by dissociation from MDM2 and to induce the kinase activity toward p53 at Ser-46 in the nucleus. These findings indicate that ATM controls stability and pro-apoptotic function of DYRK2 in response to DNA damage.
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Affiliation(s)
- Naoe Taira
- From the Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Hiroyuki Yamamoto
- From the Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Tomoko Yamaguchi
- From the Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Yoshio Miki
- From the Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8510, Japan
| | - Kiyotsugu Yoshida
- From the Department of Molecular Genetics, Medical Research Institute, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8510, Japan
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Abstract
Catalytically inactive pseudophosphatases are able to signal in the absence of enzymatic activity. Analyzing the oocyte-to-zygote transition in the worm, Cheng et al. (2009) and Parry et al. (2009) now show how two pseudophosphatases, EGG-4 and EGG-5, can regulate signaling by the DYRK family kinase MBK-2.
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Affiliation(s)
- Nicholas K Tonks
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA.
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Cheng KCC, Klancer R, Singson A, Seydoux G. Regulation of MBK-2/DYRK by CDK-1 and the pseudophosphatases EGG-4 and EGG-5 during the oocyte-to-embryo transition. Cell 2009; 139:560-72. [PMID: 19879842 DOI: 10.1016/j.cell.2009.08.047] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2008] [Revised: 06/04/2009] [Accepted: 08/26/2009] [Indexed: 02/04/2023]
Abstract
DYRKs are kinases that self-activate in vitro by autophosphorylation of a YTY motif in the kinase domain, but their regulation in vivo is not well understood. In C. elegans zygotes, MBK-2/DYRK phosphorylates oocyte proteins at the end of the meiotic divisions to promote the oocyte-to-embryo transition. Here we demonstrate that MBK-2 is under both positive and negative regulation during the transition. MBK-2 is activated during oocyte maturation by CDK-1-dependent phosphorylation of serine 68, a residue outside of the kinase domain required for full activity in vivo. The pseudotyrosine phosphatases EGG-4 and EGG-5 sequester activated MBK-2 until the meiotic divisions by binding to the YTY motif and inhibiting MBK-2's kinase activity directly, using a mixed-inhibition mechanism that does not involve tyrosine dephosphorylation. Our findings link cell-cycle progression to MBK-2/DYRK activation and the oocyte-to-embryo transition.
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Affiliation(s)
- Ken Chih-Chien Cheng
- Department of Molecular Biology and Genetics and Howard Hughes Medical Institute, Center for Cell Dynamics, Johns Hopkins School of Medicine, 725 N. Wolfe Street, PCTB 706, Baltimore, MD 21205, USA
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