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Mestareehi A, Abu-Farsakh N. Impact of Protein Phosphatase Expressions on the Prognosis of Hepatocellular Carcinoma Patients. ACS OMEGA 2024; 9:10299-10331. [PMID: 38463290 PMCID: PMC10918787 DOI: 10.1021/acsomega.3c07787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 02/02/2024] [Accepted: 02/08/2024] [Indexed: 03/12/2024]
Abstract
The study was conducted to unveil the significance of protein phosphatases in the prognosis of hepatocellular carcinoma (HCC) patients and its related molecular biological attributes as well as to discover novel potential biomarkers for therapeutic significance and diagnostic purposes that may benefit clinical practice. Analyzing a data set from 159 HCC patients using high-throughput phosphoproteomics, we examined the dysregulated expression of protein phosphatases. Employing bioinformatic and pathway analyses, we explored differentially expressed genes linked to protein phosphatases. A protein-protein interaction network was constructed using the search tool for the retrieval of interacting genes/proteins database. We quantified a total of 11,547 phosphorylation sites associated with 4043 phosphoproteins from HCC patients. Within this data set, we identified 105 identified phosphorylation sites associated with protein phosphatases; 28 genes were upregulated and 3 were downregulated in HCC. Enriched pathways using Gene Set Enrichment Analysis encompassed oocyte meiosis, proteoglycans in cancer, the oxytocin signaling pathway, the cGMP-PKG signaling pathway, the vascular smooth muscle, and the cAMP signaling pathway. The Kyoto encyclopedia of genes and genomes (KEGG) analysis highlighted pathways like mitogen-activated protein kinase, AMPK, and PI3K-Akt, indicating potential involvement in HCC progression. Notably, the PPI network identified hub genes, emphasizing their interconnections and potential roles in HCC. In our study, we found significantly upregulated levels of CDC25C, PPP1R13L, and PPP1CA, which emerge as promising avenues. This significant expression could serve as potent diagnostic and prognostic markers to enhance the effectiveness of HCC cancer treatment, offering efficiency and accuracy in patient assessment. The findings regarding protein phosphatases reveal their elevated expression in HCC, correlating with unfavorable prognosis. Moreover, the outcomes of gene ontology and KEGG pathway analyses suggest that protein phosphatases may influence liver cancer by engaging diverse targets and pathways, ultimately fostering the progression of HCC. These results underscore the substantial potential of protein phosphatases as key contributors to HCC's development and advancement. This insight holds promise for identifying therapeutic targets and charting research avenues to enhance the comprehension of the intricate molecular mechanisms underpinning HCC.
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Affiliation(s)
- Aktham Mestareehi
- Department
of Pharmaceutical Sciences, Faculty of Pharmacy, Isra University, P.O. Box 22, Amman 11622, Jordan
- Department
of Pharmaceutical Sciences, School of Pharmacy and Health Sciences, Wayne State University, Detroit, Michigan 48201, United States
- School
of Medicine, The Ohio State University, Columbus, Ohio 43202, United States
| | - Noor Abu-Farsakh
- Department
of Gastroenterology and Hepatology, Internal Medicine Department, Jordan University Hospital, Amman 11942, Jordan
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2
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Patysheva MR, Prostakishina EA, Budnitskaya AA, Bragina OD, Kzhyshkowska JG. Dual-Specificity Phosphatases in Regulation of Tumor-Associated Macrophage Activity. Int J Mol Sci 2023; 24:17542. [PMID: 38139370 PMCID: PMC10743672 DOI: 10.3390/ijms242417542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 12/11/2023] [Accepted: 12/14/2023] [Indexed: 12/24/2023] Open
Abstract
The regulation of protein kinases by dephosphorylation is a key mechanism that defines the activity of immune cells. A balanced process of the phosphorylation/dephosphorylation of key protein kinases by dual-specificity phosphatases is required for the realization of the antitumor immune response. The family of dual-specificity phosphatases is represented by several isoforms found in both resting and activated macrophages. The main substrate of dual-specificity phosphatases are three components of mitogen-activated kinase signaling cascades: the extracellular signal-regulated kinase ERK1/2, p38, and Janus kinase family. The results of the study of model tumor-associated macrophages supported the assumption of the crucial role of dual-specificity phosphatases in the formation and determination of the outcome of the immune response against tumor cells through the selective suppression of mitogen-activated kinase signaling cascades. Since mitogen-activated kinases mostly activate the production of pro-inflammatory mediators and the antitumor function of macrophages, the excess activity of dual-specificity phosphatases suppresses the ability of tumor-associated macrophages to activate the antitumor immune response. Nowadays, the fundamental research in tumor immunology is focused on the search for novel molecular targets to activate the antitumor immune response. However, to date, dual-specificity phosphatases received limited discussion as key targets of the immune system to activate the antitumor immune response. This review discusses the importance of dual-specificity phosphatases as key regulators of the tumor-associated macrophage function.
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Affiliation(s)
- Marina R. Patysheva
- Laboratory of Translational Cellular and Molecular Biomedicine, National Research Tomsk State University, 634050 Tomsk, Russia; (M.R.P.); (E.A.P.); (A.A.B.)
- Laboratory of Cancer Progression Biology, Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Sciences, 634009 Tomsk, Russia;
| | - Elizaveta A. Prostakishina
- Laboratory of Translational Cellular and Molecular Biomedicine, National Research Tomsk State University, 634050 Tomsk, Russia; (M.R.P.); (E.A.P.); (A.A.B.)
- Laboratory of Cancer Progression Biology, Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Sciences, 634009 Tomsk, Russia;
| | - Arina A. Budnitskaya
- Laboratory of Translational Cellular and Molecular Biomedicine, National Research Tomsk State University, 634050 Tomsk, Russia; (M.R.P.); (E.A.P.); (A.A.B.)
- Laboratory of Genetic Technologies, Siberian State Medical University, 634050 Tomsk, Russia
| | - Olga D. Bragina
- Laboratory of Cancer Progression Biology, Cancer Research Institute, Tomsk National Research Medical Center, Russian Academy of Sciences, 634009 Tomsk, Russia;
| | - Julia G. Kzhyshkowska
- Laboratory of Translational Cellular and Molecular Biomedicine, National Research Tomsk State University, 634050 Tomsk, Russia; (M.R.P.); (E.A.P.); (A.A.B.)
- Laboratory of Genetic Technologies, Siberian State Medical University, 634050 Tomsk, Russia
- Institute of Transfusion Medicine and Immunology, Medical Faculty Mannheim, Mannheim Institute of Innate Immunosciences (MI3), University of Heidelberg, 68167 Mannheim, Germany
- German Red Cross Blood Service Baden-Württemberg—Hessen, 69117 Mannheim, Germany
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3
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Ding Y, Chen Q. The NF-κB Pathway: a Focus on Inflammatory Responses in Spinal Cord Injury. Mol Neurobiol 2023; 60:5292-5308. [PMID: 37286724 DOI: 10.1007/s12035-023-03411-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 05/29/2023] [Indexed: 06/09/2023]
Abstract
Spinal cord injury (SCI) is a type of central nervous system trauma that can lead to severe nerve injury. Inflammatory reaction after injury is an important pathological process leading to secondary injury. Long-term stimulation of inflammation can further deteriorate the microenvironment of the injured site, leading to the deterioration of neural function. Understanding the signaling pathways that regulate responses after SCI, especially inflammatory responses, is critical for the development of new therapeutic targets and approaches. Nuclear transfer factor-κB (NF-κB) has long been recognized as a key factor in regulating inflammatory responses. The NF-κB pathway is closely related to the pathological process of SCI. Inhibition of this pathway can improve the inflammatory microenvironment and promote the recovery of neural function after SCI. Therefore, the NF-κB pathway may be a potential therapeutic target for SCI. This article reviews the mechanism of inflammatory response after SCI and the characteristics of NF-κB pathway, emphasizing the effect of inhibiting NF-κB on the inflammatory response of SCI to provide a theoretical basis for the biological treatment of SCI.
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Affiliation(s)
- Yi Ding
- Department of Spine Surgery, Ganzhou People's Hospital, 16 Meiguan Avenue, Ganzhou, Jiangxi Province, 341000, People's Republic of China
- The Affiliated Ganzhou Hospital of Nanchang University, 16 Meiguan Avenue, Ganzhou, Jiangxi Province, 341000, People's Republic of China
| | - Qin Chen
- Department of Spine Surgery, Ganzhou People's Hospital, 16 Meiguan Avenue, Ganzhou, Jiangxi Province, 341000, People's Republic of China.
- The Affiliated Ganzhou Hospital of Nanchang University, 16 Meiguan Avenue, Ganzhou, Jiangxi Province, 341000, People's Republic of China.
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4
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Zandi Z, Kashani B, Alishahi Z, Pourbagheri-Sigaroodi A, Esmaeili F, Ghaffari SH, Bashash D, Momeny M. Dual-specificity phosphatases: therapeutic targets in cancer therapy resistance. J Cancer Res Clin Oncol 2022; 148:57-70. [PMID: 34981193 DOI: 10.1007/s00432-021-03874-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 11/25/2021] [Indexed: 10/19/2022]
Abstract
PURPOSE Therapy resistance is the principal obstacle to achieving cures in cancer patients and its successful tackling requires a deep understanding of the resistance mediators. Increasing evidence indicates that tumor phosphatases are novel and druggable targets in translational oncology and their modulation may hinder tumor growth and motility and potentiate therapeutic sensitivity in various neoplasms via regulation of various signal transduction pathways. Dual-specificity phosphatases (DUSPs) are key players of cell growth, survival and death and have essential roles in tumor initiation, malignant progression and therapy resistance through regulation of the MAPK signaling pathway. In this review, different aspects of DUSPs are discussed. METHODS A comprehensive literature review was performed using various websites including PubMed. RESULTS We provide mechanistic insights into the roles of well-known DUSPs in resistance to a wide range of cancer therapeutic approaches including chemotherapy, radiation and molecular targeted therapy in human malignancies. Moreover, we discuss the development of DUSP modulators, with a focus on DUSP1 and 6 inhibitors. Ultimately, the preclinical investigations of small molecule inhibitors of DUSP1 and 6 are outlined. CONCLUSION Emerging evidence indicates that the DUSP family is aberrantly expressed in human malignancies and plays critical roles in determining sensitivity to a wide range of cancer therapeutic strategies through regulation of the MAPK signaling pathways. Consequently, targeting DUSPs and their downstream molecules can pave the way for more effective cancer therapies.
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Affiliation(s)
- Zahra Zandi
- Hematology/Oncology and Stem Cell Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Bahareh Kashani
- Hematology/Oncology and Stem Cell Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Zivar Alishahi
- Hematology/Oncology and Stem Cell Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Atieh Pourbagheri-Sigaroodi
- Department of Hematology and Blood Banking, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Esmaeili
- Hematology/Oncology and Stem Cell Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Seyed H Ghaffari
- Hematology/Oncology and Stem Cell Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Davood Bashash
- Department of Hematology and Blood Banking, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Majid Momeny
- Hematology/Oncology and Stem Cell Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran.
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5
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Xie XK, Xu ZK, Xu K, Xiao YX. DUSP19 mediates spinal cord injury-induced apoptosis and inflammation in mouse primary microglia cells via the NF-kB signaling pathway. Neurol Res 2019; 42:31-38. [PMID: 31813339 DOI: 10.1080/01616412.2019.1685068] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Objective: Spinal cord injury (SCI) is a common injury that seriously threatens human health. NF-κB may be involved in the secondary injury of SCI that is mediated by inflammation and aggravates damage. Our study was aimed to investigate the role of NF-κB signaling in DUSP19-mediated cleaved Caspase-3 expression and the release of inflammatory factors in vivo and in vitro.Materials and Methods: DUSP19 mRNA expression and the content of IL-6 and IL-8 in patients with traumatic SCI (TSCI) were measured by real-time PCR and ELISA, respectively. The levels of p-NF-κBp65, NF-κBp65 and cleaved Caspase-3 expression and the concentrations of IL-6 and IL-8 were measured by western blotting and ELISA, respectively.Results: Patients with TSCI showed lower DUSP19 expression and higher concentration of IL-6 and IL-8 compared with healthy controls. DUSP19 overexpression inhibited p-NF-κBp65 level, cleaved Caspase-3 expression, and production of IL-8 and IL-6 in the mice induced by TSCI. DUSP19 silencing increased p-NF-κBp65 level, cleaved Caspase-3 expression, and concentration of IL-6 and IL-8 in mouse primary microglia cells. DUSP19 overexpression had an inverse effect. Importantly, DUSP19 silencing and overexpression mediated p-NF-κBp65 level, cleaved Caspase-3 expression, and concentration of IL-6 and IL-8 in mouse primary microglia cells were reversed by NF-κB inhibitor pyrrolidine dithiocarbamate (PDTC) and NF-κB activator 12-myristate 13-acetate (PMA), respectively.Conclusion: These results suggested that DUSP19-mediated SCI-induced apoptosis and inflammation via NF-κB signaling and might therefore serve as a potential therapeutic target for SCI.
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Affiliation(s)
- Xian-Kuan Xie
- Department of Orthopedics, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hang Zhou, Zhejiang, PR China
| | - Zheng-Kuan Xu
- Department of Orthopedics, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hang Zhou, Zhejiang, PR China
| | - Kan Xu
- Department of Orthopedics, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hang Zhou, Zhejiang, PR China
| | - Yu-Xiang Xiao
- Department of Orthopedics, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hang Zhou, Zhejiang, PR China
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6
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Gumpena R, Lountos GT, Waugh DS. MBP-binding DARPins facilitate the crystallization of an MBP fusion protein. ACTA CRYSTALLOGRAPHICA SECTION F-STRUCTURAL BIOLOGY COMMUNICATIONS 2018; 74:549-557. [PMID: 30198887 PMCID: PMC6130421 DOI: 10.1107/s2053230x18009901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 07/10/2018] [Indexed: 12/02/2022]
Abstract
Designed ankyrin-repeat proteins (DARPins) that bind to maltose-binding protein (MBP) with high affinity can facilitate the crystallization of an MBP fusion protein. The use of MBP-specific DARPins increases the probability of obtaining crystals. The production of high-quality crystals is the main bottleneck in determining the structures of proteins using X-ray crystallography. In addition to being recognized as a very effective solubility-enhancing fusion partner, Escherichia coli maltose-binding protein (MBP) has also been successfully employed as a ‘fixed-arm’ crystallization chaperone in more than 100 cases. Here, it is reported that designed ankyrin-repeat proteins (DARPins) that bind with high affinity to MBP can promote the crystallization of an MBP fusion protein when the fusion protein alone fails to produce diffraction-quality crystals. As a proof of principle, three different co-crystal structures of MBP fused to the catalytic domain of human dual-specificity phosphatase 1 in complex with DARPins are reported.
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Affiliation(s)
- Rajesh Gumpena
- Macromolecular Crystallography Laboratory, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD 21702, USA
| | - George T Lountos
- Macromolecular Crystallography Laboratory, Basic Science Program, Leidos Biomedical Research Inc., Frederick National Laboratory for Cancer Research Sponsored by the National Cancer Institute, Frederick, MD 21702, USA
| | - David S Waugh
- Macromolecular Crystallography Laboratory, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD 21702, USA
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7
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Yao ZZ, Hu AX, Liu XS. DUSP19 regulates IL-1β-induced apoptosis and MMPs expression in rat chondrocytes through JAK2/STAT3 signaling pathway. Biomed Pharmacother 2017; 96:1209-1215. [DOI: 10.1016/j.biopha.2017.11.097] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 11/08/2017] [Accepted: 11/17/2017] [Indexed: 01/06/2023] Open
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8
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Lu C, Liu X, Zhang CS, Gong H, Wu JW, Wang ZX. Structural and Dynamic Insights into the Mechanism of Allosteric Signal Transmission in ERK2-Mediated MKP3 Activation. Biochemistry 2017; 56:6165-6175. [PMID: 29077400 DOI: 10.1021/acs.biochem.7b00827] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The mitogen-activated protein kinases (MAPKs) are key components of cellular signal transduction pathways, which are down-regulated by the MAPK phosphatases (MKPs). Catalytic activity of the MKPs is controlled both by their ability to recognize selective MAPKs and by allosteric activation upon binding to MAPK substrates. Here, we use a combination of experimental and computational techniques to elucidate the molecular mechanism for the ERK2-induced MKP3 activation. Mutational and kinetic study shows that the 334FNFM337 motif in the MKP3 catalytic domain is essential for MKP3-mediated ERK2 inactivation and is responsible for ERK2-mediated MKP3 activation. The long-term molecular dynamics (MD) simulations further reveal a complete dynamic process in which the catalytic domain of MKP3 gradually changes to a conformation that resembles an active MKP catalytic domain over the time scale of the simulation, providing a direct time-dependent observation of allosteric signal transmission in ERK2-induced MKP3 activation.
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Affiliation(s)
- Chang Lu
- Key Laboratory of Ministry of Education for Protein Science, School of Life Sciences, Tsinghua University , Beijing 100084, PR China
| | - Xin Liu
- Key Laboratory of Ministry of Education for Protein Science, School of Life Sciences, Tsinghua University , Beijing 100084, PR China
| | - Chen-Song Zhang
- State Key Laboratory of Stress Cell Biology, School of Life Sciences, Xiamen University , Xiamen, Fujian 361005, PR China
| | - Haipeng Gong
- Key Laboratory of Ministry of Education for Protein Science, School of Life Sciences, Tsinghua University , Beijing 100084, PR China
| | - Jia-Wei Wu
- Key Laboratory of Ministry of Education for Protein Science, School of Life Sciences, Tsinghua University , Beijing 100084, PR China
| | - Zhi-Xin Wang
- Key Laboratory of Ministry of Education for Protein Science, School of Life Sciences, Tsinghua University , Beijing 100084, PR China
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9
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Gumpena R, Lountos GT, Raran-Kurussi S, Tropea JE, Cherry S, Waugh DS. Crystal structure of the human dual specificity phosphatase 1 catalytic domain. Protein Sci 2017; 27:561-567. [PMID: 29052270 DOI: 10.1002/pro.3328] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 10/16/2017] [Accepted: 10/16/2017] [Indexed: 01/29/2023]
Abstract
The dual specificity phosphatase DUSP1 was the first mitogen activated protein kinase phosphatase (MKP) to be identified. It dephosphorylates conserved tyrosine and threonine residues in the activation loops of mitogen activated protein kinases ERK2, JNK1 and p38-alpha. Here, we report the crystal structure of the human DUSP1 catalytic domain at 2.49 Å resolution. Uniquely, the protein was crystallized as an MBP fusion protein in complex with a monobody that binds to MBP. Sulfate ions occupy the phosphotyrosine and putative phosphothreonine binding sites in the DUSP1 catalytic domain.
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Affiliation(s)
- Rajesh Gumpena
- Macromolecular Crystallography Laboratory, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD, 21702
| | - George T Lountos
- Macromolecular Crystallography Laboratory, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD, 21702.,Frederick National Laboratory for Cancer Research, Basic Science Program, Leidos Biomedical Research, Inc, Frederick, 21702, MD
| | - Sreejith Raran-Kurussi
- Macromolecular Crystallography Laboratory, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD, 21702.,TIFR Centre for Interdisciplinary Sciences, Hyderabad, 500075, India
| | - Joseph E Tropea
- Macromolecular Crystallography Laboratory, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD, 21702
| | - Scott Cherry
- Macromolecular Crystallography Laboratory, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD, 21702
| | - David S Waugh
- Macromolecular Crystallography Laboratory, Center for Cancer Research, National Cancer Institute at Frederick, Frederick, MD, 21702
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10
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Ogata G, Ishii Y, Asai K, Sano Y, Nin F, Yoshida T, Higuchi T, Sawamura S, Ota T, Hori K, Maeda K, Komune S, Doi K, Takai M, Findlay I, Kusuhara H, Einaga Y, Hibino H. A microsensing system for the in vivo real-time detection of local drug kinetics. Nat Biomed Eng 2017; 1:654-666. [PMID: 31015607 DOI: 10.1038/s41551-017-0118-5] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 06/30/2017] [Indexed: 01/21/2023]
Abstract
Real-time recording of the kinetics of systemically administered drugs in in vivo microenvironments may accelerate the development of effective medical therapies. However, conventional methods require considerable analyte quantities, have low sampling rates and do not address how drug kinetics correlate with target function over time. Here, we describe the development and application of a drug-sensing system consisting of a glass microelectrode and a microsensor composed of boron-doped diamond with a tip of around 40 μm in diameter. We show that, in the guinea pig cochlea, the system can measure-simultaneously and in real time-changes in the concentration of bumetanide (a diuretic that is ototoxic but applicable to epilepsy treatment) and the endocochlear potential underlying hearing. In the rat brain, we tracked the kinetics of the drug and the local field potentials representing neuronal activity. We also show that the actions of the antiepileptic drug lamotrigine and the anticancer reagent doxorubicin can be monitored in vivo. Our microsensing system offers the potential to detect pharmacological and physiological responses that might otherwise remain undetected.
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Affiliation(s)
- Genki Ogata
- Department of Molecular Physiology, Niigata University School of Medicine, Niigata, 951-8510, Japan.,Center for Transdisciplinary Research, Niigata University, Niigata, 950-2181, Japan
| | - Yuya Ishii
- Department of Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan
| | - Kai Asai
- Department of Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan
| | - Yamato Sano
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, 113-0033, Japan
| | - Fumiaki Nin
- Department of Molecular Physiology, Niigata University School of Medicine, Niigata, 951-8510, Japan.,Center for Transdisciplinary Research, Niigata University, Niigata, 950-2181, Japan
| | - Takamasa Yoshida
- Department of Molecular Physiology, Niigata University School of Medicine, Niigata, 951-8510, Japan.,Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Taiga Higuchi
- Department of Molecular Physiology, Niigata University School of Medicine, Niigata, 951-8510, Japan
| | - Seishiro Sawamura
- Department of Molecular Physiology, Niigata University School of Medicine, Niigata, 951-8510, Japan
| | - Takeru Ota
- Department of Molecular Physiology, Niigata University School of Medicine, Niigata, 951-8510, Japan
| | - Karin Hori
- Department of Molecular Physiology, Niigata University School of Medicine, Niigata, 951-8510, Japan
| | - Kazuya Maeda
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, 113-0033, Japan
| | - Shizuo Komune
- Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan.,Division of Otolaryngology-Head and Neck Surgery, Yuaikai Oda Hospital, Kashima, Saga, 849-1311, Japan
| | - Katsumi Doi
- Department of Otolaryngology, Kindai University Faculty of Medicine, Osaka, 589-8511, Japan
| | - Madoka Takai
- Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, Tokyo, 113-8656, Japan
| | - Ian Findlay
- Laboratoire des Cellules Cardiaques et Vasculaires, CNRS ERL 7368, Faculté des Sciences, Université François-Rabelais, Tours, 37200, France
| | - Hiroyuki Kusuhara
- Laboratory of Molecular Pharmacokinetics, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo, 113-0033, Japan
| | - Yasuaki Einaga
- Department of Chemistry, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan. .,JST-ACCEL, Tokyo, 812-8582, Japan.
| | - Hiroshi Hibino
- Department of Molecular Physiology, Niigata University School of Medicine, Niigata, 951-8510, Japan. .,Center for Transdisciplinary Research, Niigata University, Niigata, 950-2181, Japan.
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11
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Engin A. Human Protein Kinases and Obesity. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 960:111-134. [DOI: 10.1007/978-3-319-48382-5_5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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12
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Wang Y, Xu Z, Wang J, Xu S. DUSP19, a downstream effector of leptin, inhibits chondrocyte apoptosis via dephosphorylating JNK during osteoarthritis pathogenesis. MOLECULAR BIOSYSTEMS 2016; 12:721-8. [PMID: 26751999 DOI: 10.1039/c5mb00776c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Increased mitogen-activated protein kinase (MAPK) activity has been found in human osteoarthritis (OA). Dual specificity protein phosphatase 19 (DUSP19), a member of mitogen-activated protein kinase (MAPK) phosphatases (MKPs), controls the activity of various MAPKs. This study was aimed to explore the function of DUSP19 during OA pathogenesis. Here, OA and healthy control data were downloaded from the NCBI Gene Expression Omnibus database (GSE57218). Forty-five patients with OA and 25 healthy donors were enrolled in this study. A rat OA model was induced by anterior cruciate ligament transection. Primary cultured chondrocytes were treated with leptin (10 ng mL(-1)). Cell survival, cell apoptosis and reactive oxygen species (ROS) were identified by CCK-8 and flow cytometry, respectively. In the cartilage of OA patients, DUSP19 was expressed in a lower level than in the cartilage of healthy control. The DUSP19 level was negatively correlated with leptin, which was confirmed by experiments in the rat OA model. Moreover, cell apoptosis and JNK activation in the rat cartilage were increased with the increasing of leptin levels and the decreasing of DUSP19 mRNA levels. In primary culture chondrocytes, exogenous leptin suppressed DUSP19 expression. The ectopic expression of DUSP19 significantly ameliorated leptin-induced apoptosis in damaged chondrocytes, accompanied by the reduced production of ROS. Moreover, the activity of JNK stimulated by leptin was suppressed by DUSP19 overexpression. The present study indicated that DUSP19, a downstream of leptin, inhibited apoptosis of chondrocytes through dephosphorylating JNK.
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Affiliation(s)
- Yang Wang
- Department of Emergency, Changhai Hospital, Second Military Medical University, 168 Changhai Rd, Shanghai 200433, China.
| | - Zhengli Xu
- Department of Stomatology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - Jialin Wang
- Department of Emergency, Changhai Hospital, Second Military Medical University, 168 Changhai Rd, Shanghai 200433, China.
| | - Shuogui Xu
- Department of Emergency, Changhai Hospital, Second Military Medical University, 168 Changhai Rd, Shanghai 200433, China.
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13
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Feng H, Gerilechaogetu F, Golden HB, Nizamutdinov D, Foster DM, Glaser SS, Dostal DE. p38α MAPK inhibits stretch-induced JNK activation in cardiac myocytes through MKP-1. Int J Cardiol 2016; 203:145-55. [DOI: 10.1016/j.ijcard.2015.10.109] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 09/20/2015] [Accepted: 10/12/2015] [Indexed: 01/18/2023]
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Ríos P, Nunes-Xavier CE, Tabernero L, Köhn M, Pulido R. Dual-specificity phosphatases as molecular targets for inhibition in human disease. Antioxid Redox Signal 2014; 20:2251-73. [PMID: 24206177 DOI: 10.1089/ars.2013.5709] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
SIGNIFICANCE The dual-specificity phosphatases (DUSPs) constitute a heterogeneous group of cysteine-based protein tyrosine phosphatases, whose members exert a pivotal role in cell physiology by dephosphorylation of phosphoserine, phosphothreonine, and phosphotyrosine residues from proteins, as well as other non-proteinaceous substrates. RECENT ADVANCES A picture is emerging in which a selected group of DUSP enzymes display overexpression or hyperactivity that is associated with human disease, especially human cancer, making feasible targeted therapy approaches based on their inhibition. A panoply of molecular and functional studies on DUSPs have been performed in the previous years, and drug-discovery efforts are ongoing to develop specific and efficient DUSP enzyme inhibitors. This review summarizes the current status on inhibitory compounds targeting DUSPs that belong to the MAP kinase phosphatases-, small-sized atypical-, and phosphatases of regenerating liver subfamilies, whose inhibition could be beneficial for the prevention or mitigation of human disease. CRITICAL ISSUES Achieving specificity, potency, and bioavailability are the major challenges in the discovery of DUSP inhibitors for the clinics. Clinical validation of compounds or alternative inhibitory strategies of DUSP inhibition has yet to come. FUTURE DIRECTIONS Further work is required to understand the dual role of many DUSPs in human cancer, their function-structure properties, and to identify their physiologic substrates. This will help in the implementation of therapies based on DUSPs inhibition.
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Affiliation(s)
- Pablo Ríos
- 1 Genome Biology Unit, European Molecular Biology Laboratory , Heidelberg, Germany
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15
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Deng Q, Li KY, Chen H, Dai JH, Zhai YY, Wang Q, Li N, Wang YP, Han ZG. RNA interference against cancer/testis genes identifies dual specificity phosphatase 21 as a potential therapeutic target in human hepatocellular carcinoma. Hepatology 2014; 59:518-30. [PMID: 23929653 DOI: 10.1002/hep.26665] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Accepted: 07/29/2013] [Indexed: 01/03/2023]
Abstract
UNLABELLED Cancer/testis (CT) antigens have been considered therapeutic targets for treating cancers. However, a central question is whether their expression contributes to tumorigenesis or if they are functionally irrelevant by-products derived from the process of cellular transformation. In any case, these CT antigens are essential for cancer cell survival and may serve as potential therapeutic targets. Recently, the cell-based RNA interference (RNAi) screen has proven to be a powerful approach for identifying potential therapeutic targets. In this study we sought to identify new CT antigens as potential therapeutic targets for human hepatocellular carcinoma (HCC), and 179 potential CT genes on the X chromosome were screened through a bioinformatics analysis of gene expression profiles. Then an RNAi screen against these potential CT genes identified nine that were required for sustaining the survival of Focus and PLC/PRF/5 cells. Among the nine genes, the physiologically testis-restricted dual specificity phosphatase 21 (DUSP21) encoding a dual specificity phosphatase was up-regulated in 39 (33%) of 118 human HCC specimens. Ectopic DUSP21 had no obvious impact on proliferation and colony formation in HCC cells. However, DUSP21 silencing significantly suppressed cell proliferation, colony formation, and in vivo tumorigenicity in HCC cells. The administration of adenovirus-mediated RNAi and an atelocollagen/siRNA mixture against endogenous DUSP21 significantly suppressed xenograft HCC tumors in mice. Further investigations showed that DUSP21 knockdown led to arrest of the cell cycle in G1 phase, cell senescence, and expression changes of some factors with functions in the cell cycle and/or senescence. Furthermore, the antiproliferative role of DUSP21 knockdown is through activation of p38 mitogen-activated protein kinase in HCC. CONCLUSION DUSP21 plays an important role in sustaining HCC cell proliferation and may thus act as a potential therapeutic target in HCC treatment.
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Affiliation(s)
- Qing Deng
- Key Laboratory of Systems Biomedicine (Ministry of Education) of Rui-Jin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Shanghai-MOST Key Laboratory for Disease and Health Genomics, Chinese National Human Genome Center at Shanghai, Shanghai, China
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16
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Lokareddy RK, Bhardwaj A, Cingolani G. Atomic structure of dual-specificity phosphatase 26, a novel p53 phosphatase. Biochemistry 2013; 52:938-48. [PMID: 23298255 DOI: 10.1021/bi301476m] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Regulation of p53 phosphorylation is critical to control its stability and biological activity. Dual-specificity phosphatase 26 (DUSP26) is a brain phosphatase highly overexpressed in neuroblastoma, which has been implicated in dephosphorylating phospho-Ser20 and phospho-Ser37 in the p53 transactivation domain. In this paper, we report the 1.68 Å crystal structure of a catalytically inactive mutant (Cys152Ser) of DUSP26 lacking the first 60 N-terminal residues (ΔN60-C/S-DUSP26). This structure reveals the architecture of a dual-specificity phosphatase domain related in structure to Vaccinia virus VH1. DUSP26 adopts a closed conformation of the protein tyrosine phosphatase (PTP)-binding loop, which results in an unusually shallow active site pocket and buried catalytic cysteine. A water molecule trapped inside the PTP-binding loop makes close contacts both with main chain and with side chain atoms. The hydrodynamic radius (R(H)) of ΔN60-C/S-DUSP26 measured from velocity sedimentation analysis (R(H) ∼ 22.7 Å) and gel filtration chromatography (R(H) ∼ 21.0 Å) is consistent with an ∼18 kDa globular monomeric protein. Instead in crystal, ΔN60-C/S-DUSP26 is more elongated (R(H) ∼ 37.9 Å), likely because of the extended conformation of C-terminal helix α9, which swings away from the phosphatase core to generate a highly basic surface. As in the case of phosphatase MKP-4, we propose that a substrate-induced conformational change, possibly involving rearrangement of helix α9 with respect to the phosphatase core, allows DUSP26 to adopt a catalytically active conformation. The structural characterization of DUSP26 presented in this paper provides the first atomic insight into this disease-associated phosphatase.
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Affiliation(s)
- Ravi Kumar Lokareddy
- Department of Biochemistry and Molecular Biology, Thomas Jefferson University , 233 South 10th Street, Philadelphia, Pennsylvania 19107, United States
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17
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Park H, Park SY, Oh JJ, Ryu SE. Identification of Potent VHZ Phosphatase Inhibitors with Structure-Based Virtual Screening. ACTA ACUST UNITED AC 2012; 18:226-31. [DOI: 10.1177/1087057112463067] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
VH1-like phosphatase Z (VHZ) has proved to be a promising target for the development of therapeutics for the treatment of human cancers. Here, we report the first example for a successful application of structure-based virtual screening to identify the novel small-molecule inhibitors of VHZ. These inhibitors revealed high potencies with the associated IC50 values ranging from 3 to 20 µM and were also screened for having desirable physicochemical properties as a drug candidate. Therefore, they deserve consideration for further development by structure-activity relationship studies to optimize inhibitory and anticancer activities. Structural features relevant to the stabilization of the newly identified inhibitors in the active site of VHZ are discussed in detail.
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Affiliation(s)
| | | | - Jung Jin Oh
- The Johns Hopkins University, Baltimore, MD, USA
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18
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Abstract
Phosphatases are important regulators of intracellular signaling events, and their functions have been implicated in many biological processes. Dual-specificity phosphatases (DUSPs), whose family currently contains 25 members, are phosphatases that can dephosphorylate both tyrosine and serine/threonine residues of their substrates. The archetypical DUSP, DUSP1/MKP1, was initially discovered to regulate the activities of MAP kinases by dephosphorylating the TXY motif in the kinase domain. However, although DUSPs were discovered more than a decade ago, only in the past few years have their various functions begun to be described. DUSPs can be categorized based on the presence or absence of a MAP kinase-interacting domain into typical DUSPs and atypical DUSPs, respectively. In this review, we discuss the current understanding of how the activities of typical DUSPs are regulated and how typical DUSPs can regulate the functions of their targets. We also summarize recent findings from several in vivo DUSP-deficient mouse models that studied the involvement of DUSPs during the development and functioning of T cells. Finally, we discuss briefly the potential roles of DUSPs in the regulation of non-MAP kinase targets, as well as in the modulation of tumorigenesis.
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Affiliation(s)
- Ching-Yu Huang
- Immunology Research Center, National Health Research Institutes, Zhunan, Miaoli County, 35053, Taiwan.
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19
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Wei CH, Ryu SY, Jeon YH, Yoon MY, Jeong DG, Kim SJ, Ryu SE. Crystal structure of a novel mitogen-activated protein kinase phosphatase, SKRP1. Proteins 2011; 79:3242-6. [DOI: 10.1002/prot.23156] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2011] [Revised: 07/15/2011] [Accepted: 07/21/2011] [Indexed: 02/05/2023]
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20
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Roth Flach RJ, Bennett AM. Mitogen-activated protein kinase phosphatase-1 - a potential therapeutic target in metabolic disease. Expert Opin Ther Targets 2011; 14:1323-32. [PMID: 21058921 DOI: 10.1517/14728222.2010.528395] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
IMPORTANCE OF THE FIELD Metabolic disease, which is associated with obesity and cardiovascular disease, is a worldwide epidemic. There continues to be a tremendous effort towards the development of therapies to curtail obesity and its associated pathophysiological sequelae. MAPKs have been implicated in metabolic disease suggesting that these enzymes, and those that regulate them, can potentially serve as therapeutic targets to combat this disease. The MAPK phosphatase-1 (MKP-1) mediates the dephosphorylation and inactivation of MAPKs in insulin-responsive tissues. Therefore, the actions of MKP-1 may play an important role in the maintenance of metabolic homeostasis. AREAS COVERED IN THIS REVIEW The functional effects of MKP-1 in MAPK regulation with emphasis on its role in physiological and pathophysiological signaling functions that have been elucidated through the use of mouse genetics. WHAT THE READER WILL GAIN The reader will learn that MAPK inactivation through the effects of MKP-1 is essential for the maintenance of metabolic homeostasis. We will convey the idea that MKP-1 acts as a critical signaling node in MAPK-mediated regulation of cell signaling and metabolism. TAKE HOME MESSAGE Pharmacological inactivation of MKP-1 may be of therapeutic value in the treatment of obesity and possibly other metabolic disorders.
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Affiliation(s)
- Rachel J Roth Flach
- Yale University School of Medicine, Department of Pharmacology and Program in Integrative Cell Signaling and Neurobiology of Metabolism, New Haven, CT 06520-8066, USA
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21
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Abstract
Cdc25 phosphatases involved in cell cycle checkpoints are now active targets for the development of anti-cancer therapies. Rational drug design would certainly benefit from detailed structural information for Cdc25s. However, only apo- or sulfate-bound crystal structures of the Cdc25 catalytic domain have been described so far. Together with previously available crystalographic data, results from molecular dynamics simulations, bioinformatic analysis, and computer-generated conformational ensembles shown here indicate that the last 30-40 residues in the C-terminus of Cdc25B are partially unfolded or disordered in solution. The effect of C-terminal flexibility upon binding of two potent small molecule inhibitors to Cdc25B is then analyzed by using three structural models with variable levels of flexibility, including an equilibrium distributed ensemble of Cdc25B backbone conformations. The three Cdc25B structural models are used in combination with flexible docking, clustering, and calculation of binding free energies by the linear interaction energy approximation to construct and validate Cdc25B-inhibitor complexes. Two binding sites are identified on top and beside the Cdc25B active site. The diversity of interaction modes found increases with receptor flexibility. Backbone flexibility allows the formation of transient cavities or compact hydrophobic units on the surface of the stable, folded protein core that are unexposed or unavailable for ligand binding in rigid and densely packed crystal structures. The present results may help to speculate on the mechanisms of small molecule complexation to partially unfolded or locally disordered proteins.
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Molecular biology and anticancer drug discovery. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2010. [PMID: 21075327 DOI: 10.1016/b978-0-12-385071-3.00002-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register]
Abstract
The profound impact of molecular biology on the philosophy of how one should seek new cancer therapeutics cannot be overstated. It has enabled the discovery of unique drugs as well as the identification of new drug targets and biomarkers and the creation of powerful animal models. Nevertheless, the process of cancer drug discovery remains inherently complex and inefficient. This is partially a consequence of the requirement of any successful therapy to show differential effects toward tumor cells relative to nonmalignant cells. The goal of this chapter is to outline the impact of molecular biology on modern approaches to anticancer drug discovery and to highlight the continuing challenges.
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23
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Joachimiak A. High-throughput crystallography for structural genomics. Curr Opin Struct Biol 2009; 19:573-84. [PMID: 19765976 DOI: 10.1016/j.sbi.2009.08.002] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2009] [Revised: 08/14/2009] [Accepted: 08/20/2009] [Indexed: 11/20/2022]
Abstract
Protein X-ray crystallography recently celebrated its 50th anniversary. The structures of myoglobin and hemoglobin determined by Kendrew and Perutz provided the first glimpses into the complex protein architecture and chemistry. Since then, the field of structural molecular biology has experienced extraordinary progress and now more than 55000 protein structures have been deposited into the Protein Data Bank. In the past decade many advances in macromolecular crystallography have been driven by world-wide structural genomics efforts. This was made possible because of third-generation synchrotron sources, structure phasing approaches using anomalous signal, and cryo-crystallography. Complementary progress in molecular biology, proteomics, hardware and software for crystallographic data collection, structure determination and refinement, computer science, databases, robotics and automation improved and accelerated many processes. These advancements provide the robust foundation for structural molecular biology and assure strong contribution to science in the future. In this report we focus mainly on reviewing structural genomics high-throughput X-ray crystallography technologies and their impact.
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Affiliation(s)
- Andrzej Joachimiak
- Midwest Center for Structural Genomics, Structural Biology Center, Biosciences Division, Argonne National Laboratory, 9700 S Class Ave., Argonne, IL 60439, USA.
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Periole X, Cavalli M, Marrink SJ, Ceruso MA. Combining an Elastic Network With a Coarse-Grained Molecular Force Field: Structure, Dynamics, and Intermolecular Recognition. J Chem Theory Comput 2009; 5:2531-43. [PMID: 26616630 DOI: 10.1021/ct9002114] [Citation(s) in RCA: 459] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Structure-based and physics-based coarse-grained molecular force fields have become attractive approaches to gain mechanistic insight into the function of large biomolecular assemblies. Here, we study how both approaches can be combined into a single representation, that we term ELNEDIN. In this representation an elastic network is used as a structural scaffold to describe and maintain the overall shape of a protein and a physics-based coarse-grained model (MARTINI-2.1) is used to describe both inter- and intramolecular interactions in the system. The results show that when used in molecular dynamics simulations ELNEDIN models can be built so that the resulting structural and dynamical properties of a protein, including its collective motions, are comparable to those obtained using atomistic protein models. We then evaluate the behavior of such models in (1) long, microsecond time-scale, simulations, (2) the modeling of very large macromolecular assemblies, a viral capsid, and (3) the study of a protein-protein association process, the reassembly of the ROP homodimer. The results for this series of tests indicate that ELNEDIN models allow microsecond time-scale molecular dynamics simulations to be carried out readily, that large biological entities such as the viral capsid of the cowpea mosaic virus can be stably modeled as assemblies of independent ELNEDIN models, and that ELNEDIN models show significant promise for modeling protein-protein association processes.
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Affiliation(s)
- Xavier Periole
- Department of Chemistry and Biochemistry and Institute for Macromolecular Assemblies, The City College of New York, 160 Convent Ave, New York, New York 10031, and Groningen Biomolecular Sciences and Biotechnology Institute and Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Marco Cavalli
- Department of Chemistry and Biochemistry and Institute for Macromolecular Assemblies, The City College of New York, 160 Convent Ave, New York, New York 10031, and Groningen Biomolecular Sciences and Biotechnology Institute and Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Siewert-Jan Marrink
- Department of Chemistry and Biochemistry and Institute for Macromolecular Assemblies, The City College of New York, 160 Convent Ave, New York, New York 10031, and Groningen Biomolecular Sciences and Biotechnology Institute and Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Marco A Ceruso
- Department of Chemistry and Biochemistry and Institute for Macromolecular Assemblies, The City College of New York, 160 Convent Ave, New York, New York 10031, and Groningen Biomolecular Sciences and Biotechnology Institute and Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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25
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Molina G, Vogt A, Bakan A, Dai W, Queiroz de Oliveira P, Znosko W, Smithgall TE, Bahar I, Lazo JS, Day BW, Tsang M. Zebrafish chemical screening reveals an inhibitor of Dusp6 that expands cardiac cell lineages. Nat Chem Biol 2009; 5:680-7. [PMID: 19578332 PMCID: PMC2771339 DOI: 10.1038/nchembio.190] [Citation(s) in RCA: 186] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2008] [Accepted: 04/30/2009] [Indexed: 11/09/2022]
Abstract
The dual specificity phosphatase 6 (Dusp6) functions as a feedback regulator of fibroblast growth factor (FGF) signaling to limit the activity of extracellular signal regulated kinase (ERK) 1 and 2. We have identified a small molecule inhibitor of Dusp6, (E)-2-benzylidene-3-(cyclohexylamino)-2,3-dihydro-1H-inden-1-one (BCI), using a transgenic zebrafish chemical screen. BCI treatment blocked Dusp6 activity and enhanced FGF target gene expression in zebrafish embryos. Docking simulations predicted an allosteric binding site for BCI within the phosphatase domain. In vitro studies supported a model that BCI inhibits Dusp6 catalytic activation by ERK2 substrate binding. A temporal role for Dusp6 in restricting cardiac progenitors and controlling heart organ size was uncovered with BCI treatment at varying developmental stages. This study highlights the power of in vivo zebrafish chemical screens to identify novel compounds targeting Dusp6, a component of the FGF signaling pathway that has eluded traditional high-throughput in vitro screens.
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Affiliation(s)
- Gabriela Molina
- Department of Microbiology and Molecular Genetics, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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26
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Kolb S, Mondésert O, Goddard ML, Jullien D, Villoutreix BO, Ducommun B, Garbay C, Braud E. Development of novel thiazolopyrimidines as CDC25B phosphatase inhibitors. ChemMedChem 2009; 4:633-48. [PMID: 19212959 DOI: 10.1002/cmdc.200800415] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The development of CDC25 phosphatase inhibitors is an interesting approach toward new antitumor agents, as CDC25 play key roles in cell-cycle regulation and are overexpressed in numerous cancers. We previously reported a novel compound belonging to the thiazolopyrimidine family that inhibits CDC25 activity with an IC(50) value of 13 microM and displays cytotoxic properties against HeLa cells. Structural modifications were subsequently conducted on this new pharmacophore which led to a library of 45 thiazolopyrimidines. Regarding the in vitro effects, 14 compounds inhibit CDC25B with IC(50)<20 microM, with the most efficient inhibitor 44 improving the potency to 4.5 microM. Steady-state kinetics were performed and showed a mixed inhibition pattern for all tested compounds. Furthermore, 44 was able to revert the bypass of genotoxicity-induced G(2) arrest upon CDC25B overexpression, indicating that this compound targets the dual-specificity phosphatase in cultured cells. Finally, the cytotoxic activities of the compounds were determined against two human cancer cell lines. The results indicate that the prostatic LNCaP cell line is more sensitive to these derivatives than the pancreatic adenocarcinoma MiaPaCa-2 line. With its interesting enzymatic and cellular properties, compound 44 appears to be a promising CDC25B inhibitor for further development.
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Park H, Li M, Choi J, Cho H, Ham SW. Structure-based virtual screening approach to identify novel classes of Cdc25B phosphatase inhibitors. Bioorg Med Chem Lett 2009; 19:4372-5. [PMID: 19500977 DOI: 10.1016/j.bmcl.2009.05.078] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2009] [Revised: 05/08/2009] [Accepted: 05/20/2009] [Indexed: 11/25/2022]
Abstract
Discovery of Cdc25B phosphatase inhibitors has been actively pursued with the aim to develop anticancer agents. We have been able to identify eight novel Cdc25B inhibitors by means of a computer-aided drug design protocol involving the virtual screening with docking simulations under consideration of the effects of ligand solvation in the binding free energy function. Structural features relevant to the interactions of the newly identified inhibitors with the active-site residues of Cdc25B are also discussed in detail.
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Affiliation(s)
- Hwangseo Park
- Department of Bioscience and Biotechnology, Sejong University, Seoul 143-747, Republic of Korea
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