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Markovsky E, Baabur-Cohen H, Eldar-Boock A, Omer L, Tiram G, Ferber S, Ofek P, Polyak D, Scomparin A, Satchi-Fainaro R. Administration, distribution, metabolism and elimination of polymer therapeutics. J Control Release 2012; 161:446-60. [PMID: 22286005 DOI: 10.1016/j.jconrel.2011.12.021] [Citation(s) in RCA: 227] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Revised: 12/13/2011] [Accepted: 12/16/2011] [Indexed: 11/18/2022]
Abstract
Polymer conjugation is an efficient approach to improve the delivery of drugs and biological agents, both by protecting the body from the drug (by improving biodistribution and reducing toxicity) and by protecting the drug from the body (by preventing degradation and enhancing cellular uptake). This review discusses the journey that polymer therapeutics make through the body, following the ADME (absorption, distribution, metabolism, excretion) concept. The biological factors and delivery system parameters that influence each stage of the process will be described, with examples illustrating the different solutions to the challenges of drug delivery systems in vivo.
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Affiliation(s)
- Ela Markovsky
- Department of Physiology and Pharmacology, Sackler School of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
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252
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PIM kinases are progression markers and emerging therapeutic targets in diffuse large B-cell lymphoma. Br J Cancer 2012; 107:491-500. [PMID: 22722314 PMCID: PMC3405213 DOI: 10.1038/bjc.2012.272] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Background: PIM serine/threonine kinases are often highly expressed in haematological malignancies. We have shown that PIM inhibitors reduced the survival and migration of leukaemic cells. Here, we investigated PIM kinases in diffuse large B-cell lymphoma (DLBCL) biopsy samples and DLBCL cell lines. Methods: Immunohistochemical staining for PIM kinases and CXCR4 was performed on tissue microarrays from a cohort of 101 DLBCL cases, and the effects of PIM inhibitors on the survival and migration of DLBCL cell lines were determined. Results: PIM1 expression significantly correlated with the activation of signal transducer and activator of transcription (STAT) 3 and 5, P-glycoprotein expression, CXCR4-S339 phosphorylation, and cell proliferation. Whereas most cases exhibited cytoplasmic or cytoplasmic and nuclear PIM1 and PIM2 expression, 12 cases (10 of the non-germinal centre DLBCL type) expressed PIM1 predominately in the nucleus. Interestingly, nuclear expression of PIM1 significantly correlated with disease stage. Exposure of DLBCL cell lines to PIM inhibitors modestly impaired cellular proliferation and CXCR4-mediated migration. Conclusion: This work demonstrates that PIM expression in DLBCL is associated with activation of the JAK/STAT signalling pathway and with the proliferative activity. The correlation of nuclear PIM1 expression with disease stage and the modest response to small-molecule inhibitors suggests that PIM kinases are progression markers rather than primary therapeutic targets in DLBCL.
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253
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Kim HK, Kim CW, Vo MT, Lee HH, Lee JY, Yoon NA, Lee CY, Moon CH, Min YJ, Park JW, Cho WJ. Expression of proviral integration site for Moloney murine leukemia virus 1 (Pim-1) is post-transcriptionally regulated by tristetraprolin in cancer cells. J Biol Chem 2012; 287:28770-8. [PMID: 22700982 DOI: 10.1074/jbc.m112.376483] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The proviral integration site for Moloney murine leukemia virus 1 (Pim-1) is an oncogenic serine/threonine kinase that is up-regulated in several human cancers, facilitates cell cycle progression, and suppresses apoptosis. Previously, it has been reported that the Pim-1 3'-UTR plays important roles in the regulation of Pim-1 mRNA stability. However, the mechanisms explaining how Pim-1 mRNA stability is determined by its 3'-UTR are not well known. Here, we demonstrate that tristetraprolin (TTP) plays a critical role in the regulation of Pim-1 mRNA stability. Our results show that the level of Pim-1 expression is inversely correlated with TTP expression in human cancer cells. Pim-1 mRNA contains two AU-rich elements (ARE1 and ARE2) in the 3'-UTR. TTP bound to ARE2 and enhanced the decay of Pim-1 mRNA. Overexpression of TTP decreased Pim-1 expression and p21 and p27 phosphorylation and inhibited cell growth. Overexpression of Pim-1 cDNA without the 3'-UTR attenuated the inhibitory effects of TTP on p21 phosphorylation and cell growth. In addition, inhibition of p21 by siRNA attenuated the inhibitory effect of TTP on cell growth. Our results suggest that TTP post-transcriptionally down-regulates Pim-1 expression and that the overexpression of TTP may contribute to tumor suppression in part by down-regulating Pim-1 expression.
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Affiliation(s)
- Hong Kyeung Kim
- Department of Biological Sciences, University of Ulsan, Ulsan 680-749, Korea
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254
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Paduano F, Dattilo V, Narciso D, Bilotta A, Gaudio E, Menniti M, Agosti V, Palmieri C, Perrotti N, Fusco A, Trapasso F, Iuliano R. Protein tyrosine phosphatase PTPRJ is negatively regulated by microRNA-328. FEBS J 2012; 280:401-12. [PMID: 22564856 DOI: 10.1111/j.1742-4658.2012.08624.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Expression of PTPRJ, which is a ubiquitous receptor-type protein tyrosine phosphatase, is significantly reduced in a vast majority of human epithelial cancers and cancer cell lines (i.e. colon, lung, thyroid, mammary and pancreatic tumours). A possible role for microRNAs (miRNAs) in the negative regulation of PTPRJ expression has never been investigated. In this study, we show that overexpression of microRNA-328 (miR-328) decreases PTPRJ expression in HeLa and SKBr3 cells. Further investigations demonstrate that miR-328 acts directly on the 3'UTR of PTPRJ, resulting in reduced mRNA levels. Luciferase assay and site-specific mutagenesis were used to identify a functional miRNA response element in the 3'UTR of PTPRJ. Expression of miR-328 significantly enhances cell proliferation in HeLa and SKBr3 cells, similar to the effects of downregulation of PTPRJ with small interfering RNA. Additionally, in HeLa cells, the proliferative effect of miR-328 was not observed when PTPRJ was silenced with small interfering RNA; conversely, restoration of PTPRJ expression in miR-328-overexpressing cells abolished the proliferative activity of miR-328. In conclusion, we report the identification of miR-328 as an important player in the regulation of PTPRJ expression, and we propose that the interaction of miR-328 with PTPRJ is responsible for miR-328-dependent increase of epithelial cell proliferation.
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Affiliation(s)
- Francesco Paduano
- Dipartimento di Medicina Sperimentale e Clinica, Università Magna Graecia, Catanzaro, Italy.
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255
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Nakano H, Saito N, Parker L, Tada Y, Abe M, Tsuganezawa K, Yokoyama S, Tanaka A, Kojima H, Okabe T, Nagano T. Rational Evolution of a Novel Type of Potent and Selective Proviral Integration Site in Moloney Murine Leukemia Virus Kinase 1 (PIM1) Inhibitor from a Screening-Hit Compound. J Med Chem 2012; 55:5151-64. [DOI: 10.1021/jm3001289] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hirofumi Nakano
- Open Innovation Center for Drug
Discovery, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo
113-0033, Japan
| | - Nae Saito
- Open Innovation Center for Drug
Discovery, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo
113-0033, Japan
| | - Lorien Parker
- RIKEN Systems
and Structural
Biology Center, 1-7-22 Suehiro-cho, Tsurumi, Yokohama 230-0045, Japan
| | - Yukio Tada
- Open Innovation Center for Drug
Discovery, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo
113-0033, Japan
| | - Masanao Abe
- Open Innovation Center for Drug
Discovery, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo
113-0033, Japan
| | - Keiko Tsuganezawa
- RIKEN Systems
and Structural
Biology Center, 1-7-22 Suehiro-cho, Tsurumi, Yokohama 230-0045, Japan
| | - Shigeyuki Yokoyama
- RIKEN Systems
and Structural
Biology Center, 1-7-22 Suehiro-cho, Tsurumi, Yokohama 230-0045, Japan
| | - Akiko Tanaka
- Open Innovation Center for Drug
Discovery, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo
113-0033, Japan
- RIKEN Systems
and Structural
Biology Center, 1-7-22 Suehiro-cho, Tsurumi, Yokohama 230-0045, Japan
| | - Hirotatsu Kojima
- Open Innovation Center for Drug
Discovery, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo
113-0033, Japan
| | - Takayoshi Okabe
- Open Innovation Center for Drug
Discovery, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo
113-0033, Japan
| | - Tetsuo Nagano
- Open Innovation Center for Drug
Discovery, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo
113-0033, Japan
- Graduate School of Pharmaceutical
Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033,
Japan
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256
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Selmi T, Martello A, Vignudelli T, Ferrari E, Grande A, Gemelli C, Salomoni P, Ferrari S, Zanocco-Marani T. ZFP36 expression impairs glioblastoma cell lines viability and invasiveness by targeting multiple signal transduction pathways. Cell Cycle 2012; 11:1977-87. [PMID: 22544323 DOI: 10.4161/cc.20309] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
RNA binding proteins belonging to the TIS11/TTP gene family regulate the stability of multiple targets. Their inactivation or deregulated expression has recently been related to cancer, and it has been suggested that they are capable of displaying tumor suppressor activities. Here we describe three new targets of ZFP36 (PIM-1, PIM-3 and XIAP) and show by different approaches that its ectopic expression is capable of impairing glioblastoma cell lines viability and invasiveness by interfering with different transduction pathways. Moreover, we provide evidence that compounds capable of inducing the expression of TIS11/TTP genes determine a comparable biological effect on the same cell contexts.
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Affiliation(s)
- Tommaso Selmi
- Dipartimento di Scienze Biomediche, Sezione di Chimica Biologica, Università di Modena e Reggio Emilia, Modena, Italy
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257
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258
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Lang MF, Yang S, Zhao C, Sun G, Murai K, Wu X, Wang J, Gao H, Brown CE, Liu X, Zhou J, Peng L, Rossi JJ, Shi Y. Genome-wide profiling identified a set of miRNAs that are differentially expressed in glioblastoma stem cells and normal neural stem cells. PLoS One 2012; 7:e36248. [PMID: 22558405 PMCID: PMC3340364 DOI: 10.1371/journal.pone.0036248] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Accepted: 03/29/2012] [Indexed: 11/18/2022] Open
Abstract
A major challenge in cancer research field is to define molecular features that distinguish cancer stem cells from normal stem cells. In this study, we compared microRNA (miRNA) expression profiles in human glioblastoma stem cells and normal neural stem cells using combined microarray and deep sequencing analyses. These studies allowed us to identify a set of 10 miRNAs that are considerably up-regulated or down-regulated in glioblastoma stem cells. Among them, 5 miRNAs were further confirmed to have altered expression in three independent lines of glioblastoma stem cells by real-time RT-PCR analysis. Moreover, two of the miRNAs with increased expression in glioblastoma stem cells also exhibited elevated expression in glioblastoma patient tissues examined, while two miRNAs with decreased expression in glioblastoma stem cells displayed reduced expression in tumor tissues. Furthermore, we identified two oncogenes, NRAS and PIM3, as downstream targets of miR-124, one of the down-regulated miRNAs; and a tumor suppressor, CSMD1, as a downstream target of miR-10a and miR-10b, two of the up-regulated miRNAs. In summary, this study led to the identification of a set of miRNAs that are differentially expressed in glioblastoma stem cells and normal neural stem cells. Characterizing the role of these miRNAs in glioblastoma stem cells may lead to the development of miRNA-based therapies that specifically target tumor stem cells, but spare normal stem cells.
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Affiliation(s)
- Ming-Fei Lang
- Department of Neurosciences, Center for Gene Expression and Drug Discovery, Cancer Center, Beckman Research Institute of City of Hope, Duarte, California, United States of America
| | - Su Yang
- Department of Neurosciences, Center for Gene Expression and Drug Discovery, Cancer Center, Beckman Research Institute of City of Hope, Duarte, California, United States of America
- Irell & Manella Graduate School of Biological Sciences, Beckman Research Institute of City of Hope, Duarte, California, United States of America
| | - Chunnian Zhao
- Department of Neurosciences, Center for Gene Expression and Drug Discovery, Cancer Center, Beckman Research Institute of City of Hope, Duarte, California, United States of America
| | - Guoqiang Sun
- Department of Neurosciences, Center for Gene Expression and Drug Discovery, Cancer Center, Beckman Research Institute of City of Hope, Duarte, California, United States of America
| | - Kiyohito Murai
- Department of Neurosciences, Center for Gene Expression and Drug Discovery, Cancer Center, Beckman Research Institute of City of Hope, Duarte, California, United States of America
| | - Xiwei Wu
- Department of Molecular Medicine, Beckman Research Institute of City of Hope, Duarte, California, United States of America
| | - Jinhui Wang
- DNA sequencing/Solexa Core, Beckman Research Institute of City of Hope, Duarte, California, United States of America
| | - Hanlin Gao
- DNA sequencing/Solexa Core, Beckman Research Institute of City of Hope, Duarte, California, United States of America
| | - Christine E. Brown
- Department of Hematology and Hematopoietic Cell Transplantation, Beckman Research Institute of City of Hope, Duarte, California, United States of America
| | - Xiaoxuan Liu
- Centre Interdisciplinaire de Nanoscience de Marseille, CNRS UMR 7325, Aix-Marseille University, Marseille, France
| | - Jiehua Zhou
- Department of Molecular and Cellular Biology, Beckman Research Institute of City of Hope, Duarte, California, United States of America
| | - Ling Peng
- Centre Interdisciplinaire de Nanoscience de Marseille, CNRS UMR 7325, Aix-Marseille University, Marseille, France
| | - John J. Rossi
- Irell & Manella Graduate School of Biological Sciences, Beckman Research Institute of City of Hope, Duarte, California, United States of America
- Department of Molecular and Cellular Biology, Beckman Research Institute of City of Hope, Duarte, California, United States of America
| | - Yanhong Shi
- Department of Neurosciences, Center for Gene Expression and Drug Discovery, Cancer Center, Beckman Research Institute of City of Hope, Duarte, California, United States of America
- Irell & Manella Graduate School of Biological Sciences, Beckman Research Institute of City of Hope, Duarte, California, United States of America
- * E-mail:
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259
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Abstract
Virtually all the cells constituting solid organs in adult animals require anchorage to the extracellular matrix for their proliferation and survival. When deprived of anchorage, those cells arrest in G(1) phase of the cell cycle and die of apoptosis known as anoikis. However, if malignantly transformed, cells no longer require such an anchorage to proliferate and survive, and it is generally thought that the acquirement of this ability underlies the tumorigenic and metastatic capability of malignant cells. Therefore, for the past two decades, great efforts have been devoted to uncovering the nature of the anchorage signal and the mechanism by which this signal controls the G(1)-S transition in the cell cycle with little progress. However, several critical findings were recently made on anchorage signaling and the control of the cell cycle and cell death by this signaling. This review focuses on the newly emerging understanding and perspective of this highly important cell cycle and cell death regulation.
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Affiliation(s)
- Hiroto Okayama
- Department of Biochemistry and Molecular Biology, Faculty and Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
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260
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Akué-Gédu R, Letribot B, Saugues E, Debiton E, Anizon F, Moreau P. Kinase inhibitory potencies and in vitro antiproliferative activities of N-10 substituted pyrrolo[2,3-a]carbazole derivatives. Bioorg Med Chem Lett 2012; 22:3807-9. [PMID: 22543026 DOI: 10.1016/j.bmcl.2012.03.098] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 03/23/2012] [Accepted: 03/28/2012] [Indexed: 12/14/2022]
Abstract
Development of potent and selective Pim kinase inhibitors has recently emerged as an important field for the design of new anti-cancer drugs. We report the synthesis of new N-10-substituted pyrrolo[2,3-a]carbazole derivatives and their evaluation as Pim kinase inhibitors. Moreover, in vitro antiproliferative activity of these compounds was evaluated toward a human fibroblast primary culture and three human solid cancer cell lines (PA1, PC3 and DU145). Compounds 3, 7 and 10 showed inhibitory potencies toward Pim-1 and Pim-3 in the nanomolar range. Additionally, dimethylamino analog 10 also demonstrated interesting sub-micromolar antiproliferative activities toward the cell lines tested.
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Affiliation(s)
- Rufine Akué-Gédu
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, Clermont-Ferrand, France
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261
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Ronquist G. Prostasomes are mediators of intercellular communication: from basic research to clinical implications. J Intern Med 2012; 271:400-13. [PMID: 22112042 DOI: 10.1111/j.1365-2796.2011.02487.x] [Citation(s) in RCA: 100] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Prostasomes are nanosized microvesicles secreted by acinar epithelial cells of the prostate gland. Furthermore, they are intracellular microvesicles inside another larger vesicle, a so-called storage vesicle, equivalent to multivesicular bodies of late endosomal origin. Prostasomes are thought to play an important role in intercellular communication by direct interaction primarily between the immobile acinar cells of the prostate gland and the mobile spermatozoa. Prostasomes transfer not only membrane components but also genetic material to spermatozoa. They are rich in various transferable bioactive molecules (e.g., receptors and enzymes) that promote the fertilizing ability of spermatozoa. In this review, the pleiotropic biological effects of prostasomes that are relevant for successful fertilization will be discussed. The ability to synthesize and export prostasomes to the extracellular space is observed not only in normal prostate epithelial cells but also in malignant prostate cells. Release of prostasomes by prostate cancer cells suggests a role in malignant cell growth and proliferation. These findings may provide new therapeutic and diagnostic strategies.
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Affiliation(s)
- G Ronquist
- Department of Medical Sciences, Clinical Chemistry, University Hospital, Uppsala, Sweden.
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262
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Abstract
INTRODUCTION Inhibition of protein kinases has become a standard of modern clinical oncology. PIM1 belongs to a novel class of serine/threonine kinases with distinct molecular and biochemical features regulating various oncogenic pathways, for example hypoxia response, cell cycle progression and apoptosis resistance. PIM1 is overexpressed in human cancer diseases and has been associated with metastasis and overall treatment response; in experimental models, inhibition of PIM1 suppressed cell proliferation and migration, induced apoptotic cell death and synergized with other chemotherapeutic agents. AREAS COVERED A PubMed literature search was performed to review the currently available data on PIM1 expression, regulation and targets; its implication in different types of cancer and its impact on prognosis are described. We present ATP-competitive PIM1 inhibitors and the state of the art of PIM1 inhibitor design. Finally, we highlight the development of the unusual class of highly selective and potent organometallic PIM1 inhibitors. EXPERT OPINION As PIM1 possesses oncogenic functions and is overexpressed in various kinds of cancer diseases, its inhibition provides a new option in cancer therapy. Based on the ability of highly selective organometallic PIM1 inhibitors, promising in vivo applicability is expected.
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Affiliation(s)
- Anna Lena Merkel
- Philipps University Marburg, Institute for Surgical Research, Baldingerstrasse, Marburg, 35033, Germany
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263
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Letribot B, Akué-Gédu R, Santio NM, El-Ghozzi M, Avignant D, Cisnetti F, Koskinen PJ, Gautier A, Anizon F, Moreau P. Use of copper(I) catalyzed azide alkyne cycloaddition (CuAAC) for the preparation of conjugated pyrrolo[2,3-a]carbazole Pim kinase inhibitors. Eur J Med Chem 2012; 50:304-10. [PMID: 22386260 DOI: 10.1016/j.ejmech.2012.02.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Revised: 02/02/2012] [Accepted: 02/03/2012] [Indexed: 12/14/2022]
Abstract
We have previously demonstrated that pyrrolo[2,3-a]carbazole-3-carbaldehydes are potent Pim kinase inhibitors with in vitro antiproliferative activities. In the present study, we report the synthesis of new pyrrolocarbazoles substituted at the N-10 position. When their ability to inhibit Pim kinase activities were evaluated in in vitro assays, we observed that this nitrogen atom can be substituted without loss of Pim-1 and Pim-3 inhibitory potencies. Moreover, when we added a fluorescent dansyl group (compound 13), we were able to show that 13 penetrates the plasma membrane and enters the cytoplasm.
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Affiliation(s)
- Boris Letribot
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont-Ferrand, France
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264
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Abstract
The PIM genes represent a family of proto-oncogenes that encode three different serine/threonine protein kinases (PIM1, PIM2 and PIM3) with essential roles in the regulation of signal transduction cascades, which promote cell survival, proliferation and drug resistance. PIM kinases are overexpressed in several hematopoietic tumors and support in vitro and in vivo malignant cell growth and survival, through cell cycle regulation and inhibition of apoptosis. PIM kinases do not have an identified regulatory domain, which means that these proteins are constitutively active once transcribed. They appear to be critical downstream effectors of important oncoproteins and, when overexpressed, can mediate drug resistance to available agents, such as rapamycin. Recent crystallography studies reveal that, unlike other kinases, they possess a hinge region, which creates a unique binding pocket for ATP, offering a target for an increasing number of potent small-molecule PIM kinase inhibitors. Preclinical studies in models of various hematologic cancers indicate that these novel agents show promising activity and some of them are currently being evaluated in a clinical setting. In this review, we profile the PIM kinases as targets for therapeutics in hematologic malignancies.
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Affiliation(s)
- Yesid Alvarado
- Department of Hematology/Oncology, Cancer Therapy & Research Center, The University of Texas Health Science Center San Antonio, 7979 Wurzbach Road, MC8232, San Antonio, 78229, TX, USA
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265
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Pastor J, Oyarzabal J, Saluste G, Alvarez RM, Rivero V, Ramos F, Cendón E, Blanco-Aparicio C, Ajenjo N, Cebriá A, Albarrán M, Cebrián D, Corrionero A, Fominaya J, Montoya G, Mazzorana M. Hit to lead evaluation of 1,2,3-triazolo[4,5-b]pyridines as PIM kinase inhibitors. Bioorg Med Chem Lett 2012; 22:1591-7. [DOI: 10.1016/j.bmcl.2011.12.130] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Revised: 12/27/2011] [Accepted: 12/28/2011] [Indexed: 10/14/2022]
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266
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Tsuganezawa K, Watanabe H, Parker L, Yuki H, Taruya S, Nakagawa Y, Kamei D, Mori M, Ogawa N, Tomabechi Y, Handa N, Honma T, Yokoyama S, Kojima H, Okabe T, Nagano T, Tanaka A. A novel Pim-1 kinase inhibitor targeting residues that bind the substrate peptide. J Mol Biol 2012; 417:240-52. [PMID: 22306408 DOI: 10.1016/j.jmb.2012.01.036] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Revised: 01/19/2012] [Accepted: 01/24/2012] [Indexed: 10/14/2022]
Abstract
A new screening method using fluorescent correlation spectroscopy was developed to select kinase inhibitors that competitively inhibit the binding of a fluorescently labeled substrate peptide. Using the method, among approximately 700 candidate compounds selected by virtual screening, we identified a novel Pim-1 kinase inhibitor targeting its peptide binding residues. X-ray crystal analysis of the complex structure of Pim-1 with the inhibitor indicated that the inhibitor actually binds to the ATP-binding site and also forms direct interactions with residues (Asp128 and Glu171) that bind the substrate peptide. These interactions, which cause small side-chain movements, seem to affect the binding ability of the fluorescently labeled substrate. The compound inhibited Pim-1 kinase in vitro, with an IC(50) value of 150 nM. Treatment of cultured leukemia cells with the compound reduced the amount of p21 and increased the amount of p27, due to Pim-1 inhibition, and then triggered apoptosis after cell-cycle arrest at the G(1)/S phase. This screening method may be widely applicable for the identification of various new Pim-1 kinase inhibitors targeting the residues that bind the substrate peptide.
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Affiliation(s)
- Keiko Tsuganezawa
- RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi, Yokohama 230-0045, Japan
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267
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Hsu JL, Leong PK, Ho YF, Hsu LC, Lu PH, Chen CS, Guh JH. Pim-1 knockdown potentiates paclitaxel-induced apoptosis in human hormone-refractory prostate cancers through inhibition of NHEJ DNA repair. Cancer Lett 2012; 319:214-222. [PMID: 22261337 DOI: 10.1016/j.canlet.2012.01.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2011] [Revised: 12/26/2011] [Accepted: 01/10/2012] [Indexed: 01/08/2023]
Abstract
The knockdown of Pim-1 or inhibition of Pim-1 activity significantly increased γ-H2A.X expression. The effect was correlated to apoptosis and was attributed to the inhibition of nonhomologous DNA-end-joining (NHEJ) repair activity supported by the following observations: (1) inhibition of ATM and DNA-PKcs activities, (2) down-regulation of Ku expression and nuclear localization and (3) decrease of DNA end-binding of both Ku70 and Ku80. The data suggest that Pim-1 plays a crucial role in the regulation of NHEJ repair. In the absence of Pim-1, the ability of DNA repair significantly decreases when exposed to paclitaxel, leading to severe DNA damage and apoptosis.
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Affiliation(s)
- Jui-Ling Hsu
- School of Pharmacy, National Taiwan University, No. 1, Sect. 1, Jen-Ai Road, Taipei 100, Taiwan
| | - Pui-Kei Leong
- School of Pharmacy, National Taiwan University, No. 1, Sect. 1, Jen-Ai Road, Taipei 100, Taiwan
| | - Yunn-Fang Ho
- School of Pharmacy, National Taiwan University, No. 1, Sect. 1, Jen-Ai Road, Taipei 100, Taiwan
| | - Lih-Ching Hsu
- School of Pharmacy, National Taiwan University, No. 1, Sect. 1, Jen-Ai Road, Taipei 100, Taiwan
| | - Pin-Hsuan Lu
- School of Pharmacy, National Taiwan University, No. 1, Sect. 1, Jen-Ai Road, Taipei 100, Taiwan
| | - Ching-Shih Chen
- Division of Medicinal Chemistry, College of Pharmacy, The Ohio State University, Columbus, OH 43210, USA
| | - Jih-Hwa Guh
- School of Pharmacy, National Taiwan University, No. 1, Sect. 1, Jen-Ai Road, Taipei 100, Taiwan.
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268
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Huber K, Brault L, Fedorov O, Gasser C, Filippakopoulos P, Bullock AN, Fabbro D, Trappe J, Schwaller J, Knapp S, Bracher F. 7,8-dichloro-1-oxo-β-carbolines as a versatile scaffold for the development of potent and selective kinase inhibitors with unusual binding modes. J Med Chem 2012; 55:403-13. [PMID: 22136433 PMCID: PMC3257585 DOI: 10.1021/jm201286z] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Development of both potent and selective kinase inhibitors is a challenging task in modern drug discovery. The innate promiscuity of kinase inhibitors largely results from ATP-mimetic binding to the kinase hinge region. We present a novel class of substituted 7,8-dichloro-1-oxo-β-carbolines based on the distinct structural features of the alkaloid bauerine C whose kinase inhibitory activity does not rely on canonical ATP-mimetic hinge interactions. Intriguingly, cocrystal structures revealed an unexpected inverted binding mode and the presence of halogen bonds with kinase backbone residues. The compounds exhibit excellent selectivity over a comprehensive panel of human protein kinases while inhibiting selected kinases such as the oncogenic PIM1 at low nanomolar concentrations. Together, our biochemical and structural data suggest that this scaffold may serve as a valuable template for the design and development of specific inhibitors of various kinases including the PIM family of kinases, CLKs, DAPK3 (ZIPK), BMP2K (BIKE), and others.
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Affiliation(s)
- Kilian Huber
- Department of Pharmacy, Center
for Drug Research, Ludwig-Maximilians University of Munich, Butenandtstrasse 5-13, 81377 Munich, Germany
| | - Laurent Brault
- Department of Biomedicine, University
Hospital of Basel, Hebelstrasse 20, 4031
Basel, Switzerland
| | - Oleg Fedorov
- Nuffield
Department of Clinical
Medicine, Structural Genomics Consortium, University
of Oxford, Old Road Campus Research Building, Roosevelt
Drive, Oxford OX3 7DQ, U.K
| | - Christelle Gasser
- Department of Biomedicine, University
Hospital of Basel, Hebelstrasse 20, 4031
Basel, Switzerland
| | - Panagis Filippakopoulos
- Nuffield
Department of Clinical
Medicine, Structural Genomics Consortium, University
of Oxford, Old Road Campus Research Building, Roosevelt
Drive, Oxford OX3 7DQ, U.K
| | - Alex N. Bullock
- Nuffield
Department of Clinical
Medicine, Structural Genomics Consortium, University
of Oxford, Old Road Campus Research Building, Roosevelt
Drive, Oxford OX3 7DQ, U.K
| | - Doriano Fabbro
- Novartis Pharma
AG, Klybeckstrasse 141, CH-4002 Basel, Switzerland
| | - Jörg Trappe
- Novartis Pharma
AG, Klybeckstrasse 141, CH-4002 Basel, Switzerland
| | - Jürg Schwaller
- Department of Biomedicine, University
Hospital of Basel, Hebelstrasse 20, 4031
Basel, Switzerland
| | - Stefan Knapp
- Nuffield
Department of Clinical
Medicine, Structural Genomics Consortium, University
of Oxford, Old Road Campus Research Building, Roosevelt
Drive, Oxford OX3 7DQ, U.K
| | - Franz Bracher
- Department of Pharmacy, Center
for Drug Research, Ludwig-Maximilians University of Munich, Butenandtstrasse 5-13, 81377 Munich, Germany,Phone: +49-89-2180 77301. Fax: +49-89-2180 77802. E-mail:
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269
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Wang YY, Taniguchi T, Baba T, Li YY, Ishibashi H, Mukaida N. Identification of a phenanthrene derivative as a potent anticancer drug with Pim kinase inhibitory activity. Cancer Sci 2012; 103:107-15. [PMID: 21981263 PMCID: PMC11164172 DOI: 10.1111/j.1349-7006.2011.02117.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Pim-3, a proto-oncogene with serine/threonine kinase activity, is aberrantly expressed in malignant lesions, but not in normal tissues, of endoderm-derived organs, including the pancreas, liver, colon, and stomach. Furthermore, the development of hepatocellular carcinoma is accelerated in mice expressing Pim-3 transgene selectively in the liver when these mice are treated with a hepatocarcinogen. These observations suggest that a chemical targeting Pim-3 kinase may be a novel type of anticancer drug. In the present study, we screened low molecular weight chemicals and observed that the phenanthrene derivative T26 potently inhibited Pim-3 and Pim-1, but only weakly inhibited Pim-2. Moreover, T26 markedly inhibited the in vitro growth of human pancreatic cancer cell lines by inducing apoptosis and G(2) /M arrest. The growth inhibitory effects of T26 were reversed by overexpression of Pim-3 cDNA in human pancreatic cancer cells, indicating that T26 acts primarily on Pim-3. Furthermore, T26 inhibited the growth of a human pancreatic cancer cell line in nude mice without causing apparent adverse effects when it was administered after tumor formation was evident. These observations imply that the chemical and its related compounds may be effective for the treatment of cancers in which there is aberrant Pim-3 expression.
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Affiliation(s)
- Ying-Ying Wang
- Division of Molecular Bioregulation, Cancer Research Institute, Kanazawa University, Kanazawa
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270
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Walpen T, Peier M, Haas E, Kalus I, Schwaller J, Battegay E, Humar R. Loss ofPim1Imposes a Hyperadhesive Phenotype on Endothelial Cells. Cell Physiol Biochem 2012. [DOI: 10.1159/000341484] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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271
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Abstract
Abstract
PIM serine/threonine kinases are overexpressed, translocated, or amplified in multiple B-cell lymphoma types. We have explored the frequency and relevance of PIM expression in different B-cell lymphoma types and investigated whether PIM inhibition could be a rational therapeutic approach. Increased expression of PIM2 was detected in subsets of mantle cell lymphoma, diffuse large B-cell lymphoma (DLBLC), follicular lymphoma, marginal zone lymphoma-mucosa–associated lymphoid tissue type, chronic lymphocytic leukemia, and nodal marginal zone lymphoma cases. Increased PIM2 protein expression was associated with an aggressive clinical course in activated B-like-DLBCL patients. Pharmacologic and genetic inhibition of PIM2 revealed p4E-BP1(Thr37/46) and p4E-BP1(Ser65) as molecular biomarkers characteristic of PIM2 activity and indicated the involvement of PIM2 kinase in regulating mammalian target of rapamycin complex 1. The simultaneous genetic inhibition of all 3 PIM kinases induced changes in apoptosis and cell cycle. In conclusion, we show that PIM2 kinase inhibition is a rational approach in DLBCL treatment, identify appropriate biomarkers for pharmacodynamic studies, and provide a new marker for patient stratification.
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272
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Zhukova YN, Alekseeva MG, Zakharevich NV, Shtil AA, Danilenko VN. Pim family of protein kinases: Structure, functions, and roles in hematopoietic malignancies. Mol Biol 2011. [DOI: 10.1134/s0026893311040170] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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273
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Nishiguchi GA, Atallah G, Bellamacina C, Burger MT, Ding Y, Feucht PH, Garcia PD, Han W, Klivansky L, Lindvall M. Discovery of novel 3,5-disubstituted indole derivatives as potent inhibitors of Pim-1, Pim-2, and Pim-3 protein kinases. Bioorg Med Chem Lett 2011; 21:6366-9. [PMID: 21945284 DOI: 10.1016/j.bmcl.2011.08.105] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Revised: 08/19/2011] [Accepted: 08/25/2011] [Indexed: 12/14/2022]
Abstract
A series of novel 3,5-disubstituted indole derivatives as potent and selective inhibitors of all three members of the Pim kinase family is described. High throughput screen identified a pan-Pim kinase inhibitor with a promiscuous scaffold. Guided by structure-based drug design, SAR of the series afforded a highly selective indole chemotype that was further developed into a potent set of compounds against Pim-1, 2, and 3 (Pim-1 and Pim-3: IC(50)≤2nM and Pim-2: IC(50)≤100nM).
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Affiliation(s)
- Gisele A Nishiguchi
- Global Discovery Chemistry/Oncology and Exploratory Chemistry, Novartis Institutes of BioMedical Research, Emeryville, CA 94608, USA.
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274
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Isaac M, Siu A, Jongstra J. The oncogenic PIM kinase family regulates drug resistance through multiple mechanisms. Drug Resist Updat 2011; 14:203-11. [DOI: 10.1016/j.drup.2011.04.002] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 04/18/2011] [Accepted: 04/18/2011] [Indexed: 01/05/2023]
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275
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Miduturu CV, Deng X, Kwiatkowski N, Yang W, Brault L, Filippakopoulos P, Chung E, Yang Q, Schwaller J, Knapp S, King RW, Lee JD, Herrgard S, Zarrinkar P, Gray NS. High-throughput kinase profiling: a more efficient approach toward the discovery of new kinase inhibitors. CHEMISTRY & BIOLOGY 2011; 18:868-79. [PMID: 21802008 PMCID: PMC3171802 DOI: 10.1016/j.chembiol.2011.05.010] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Revised: 04/28/2011] [Accepted: 05/02/2011] [Indexed: 12/27/2022]
Abstract
Selective protein kinase inhibitors have only been developed against a small number of kinase targets. Here we demonstrate that "high-throughput kinase profiling" is an efficient method for the discovery of lead compounds for established as well as unexplored kinase targets. We screened a library of 118 compounds constituting two distinct scaffolds (furan-thiazolidinediones and pyrimido-diazepines) against a panel of 353 kinases. A distinct kinase selectivity profile was observed for each scaffold. Selective inhibitors were identified with submicromolar cellular activity against PIM1, ERK5, ACK1, MPS1, PLK1-3, and Aurora A,B kinases. In addition, we identified potent inhibitors for so far unexplored kinases such as DRAK1, HIPK2, and DCAMKL1 that await further evaluation. This inhibitor-centric approach permits comprehensive assessment of a scaffold of interest and represents an efficient and general strategy for identifying new selective kinase inhibitors.
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Affiliation(s)
- Chandrasekhar V. Miduturu
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School and Department of Cancer Biology, Dana-Farber Cancer Institute, 250 Longwood Avenue, Boston, MA 02115, USA
| | - Xianming Deng
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School and Department of Cancer Biology, Dana-Farber Cancer Institute, 250 Longwood Avenue, Boston, MA 02115, USA
| | - Nicholas Kwiatkowski
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School and Department of Cancer Biology, Dana-Farber Cancer Institute, 250 Longwood Avenue, Boston, MA 02115, USA
| | - Wannian Yang
- Weis Center for Research, 100 North Academy Avenue, Danville, PA 17822, USA
| | - Laurent Brault
- University Hospital Basel, Department of Biomedicine, Hebelstrasse 20, 4031 Basel, Switzerland
| | - Panagis Filippakopoulos
- Structural Genomics Consortium, Nuffield Department of Clinical Medicine and Department of Clinical Pharmacology, University of Oxford, Oxford, UK
| | - Eunah Chung
- Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA
| | - Qingkai Yang
- Department of Immunology and Microbiological Science, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Juerg Schwaller
- University Hospital Basel, Department of Biomedicine, Hebelstrasse 20, 4031 Basel, Switzerland
| | - Stefan Knapp
- Structural Genomics Consortium, Nuffield Department of Clinical Medicine and Department of Clinical Pharmacology, University of Oxford, Oxford, UK
| | - Randall W. King
- Department of Cell Biology, Harvard Medical School, 240 Longwood Avenue, Boston, MA 02115, USA
| | - Jiing-Dwan Lee
- Department of Immunology and Microbiological Science, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Sanna Herrgard
- Ambit Biosciences, 4215 Sorrento Valley Blvd., San Diego, CA 92121, USA
| | - Patrick Zarrinkar
- Ambit Biosciences, 4215 Sorrento Valley Blvd., San Diego, CA 92121, USA
| | - Nathanael S. Gray
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School and Department of Cancer Biology, Dana-Farber Cancer Institute, 250 Longwood Avenue, Boston, MA 02115, USA
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276
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Thomas M, Lange-Grünweller K, Weirauch U, Gutsch D, Aigner A, Grünweller A, Hartmann RK. The proto-oncogene Pim-1 is a target of miR-33a. Oncogene 2011; 31:918-28. [PMID: 21743487 DOI: 10.1038/onc.2011.278] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The constitutively active serine/threonine kinase Pim-1 is upregulated in different cancer types, mainly based on the action of several interleukines and growth factors at the transcriptional level. So far, a regulation of oncogenic Pim-1 by microRNAs (miRNAs) has not been reported. Here, we newly establish miR-33a as a miRNA with potential tumor suppressor activity, acting through inhibition of Pim-1. A screen for miRNA expression in K562 lymphoma, LS174T colon carcinoma and several other cell lines revealed generally low endogenous miR-33a levels relative to other miRNAs. Transfection of K562 and LS174T cells with a miR-33a mimic reduced Pim-1 levels substantially. In contrast, the cell-cycle regulator cyclin-dependent kinase 6 predicted to be a conserved miR-33a target, was not downregulated by the miR-33a mimic. Seed mutagenesis of the Pim-1 3'-untranslated region in a luciferase reporter construct and in a Pim-1 cDNA expressed in Pim-1-deficient Skov-3 cells demonstrated specific and direct downregulation of Pim-1 by the miR-33a mimic. The persistence of this effect was comparable to that of a small interfering RNA-mediated knockdown of Pim-1, resulting in decelerated cell proliferation. In conclusion, we demonstrate the potential of miR-33a to act as a tumor suppressor miRNA, which suggests miR-33a replacement therapy through delivery of miR mimics as a novel therapeutic strategy.
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Affiliation(s)
- M Thomas
- Institute of Pharmaceutical Chemistry, Faculty of Pharmacy, Philipps-University Marburg, Marburg, Germany
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277
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Alagaratnam S, Lind GE, Kraggerud SM, Lothe RA, Skotheim RI. The testicular germ cell tumour transcriptome. ACTA ACUST UNITED AC 2011; 34:e133-50; discussion e150-1. [DOI: 10.1111/j.1365-2605.2011.01169.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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278
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Ren JX, Li LL, Zheng RL, Xie HZ, Cao ZX, Feng S, Pan YL, Chen X, Wei YQ, Yang SY. Discovery of novel Pim-1 kinase inhibitors by a hierarchical multistage virtual screening approach based on SVM model, pharmacophore, and molecular docking. J Chem Inf Model 2011; 51:1364-75. [PMID: 21618971 DOI: 10.1021/ci100464b] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In this investigation, we describe the discovery of novel potent Pim-1 inhibitors by employing a proposed hierarchical multistage virtual screening (VS) approach, which is based on support vector machine-based (SVM-based VS or SB-VS), pharmacophore-based VS (PB-VS), and docking-based VS (DB-VS) methods. In this approach, the three VS methods are applied in an increasing order of complexity so that the first filter (SB-VS) is fast and simple, while successive ones (PB-VS and DB-VS) are more time-consuming but are applied only to a small subset of the entire database. Evaluation of this approach indicates that it can be used to screen a large chemical library rapidly with a high hit rate and a high enrichment factor. This approach was then applied to screen several large chemical libraries, including PubChem, Specs, and Enamine as well as an in-house database. From the final hits, 47 compounds were selected for further in vitro Pim-1 inhibitory assay, and 15 compounds show nanomolar level or low micromolar inhibition potency against Pim-1. In particular, four of them were found to have new scaffolds which have potential for the chemical development of Pim-1 inhibitors.
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Affiliation(s)
- Ji-Xia Ren
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan, China
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279
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Abstract
Pim-3 is a member of the Provirus integrating site Moloney murine leukemia virus (Pim) family, which belongs to the Ca(2+) /calmodulin-dependent protein kinase (CaMK) group and exhibits serine/threonine kinase activity. Similar to other members of the Pim family (i.e. Pim-1 and Pim-2), Pim-3 can prevent apoptosis and promote cell survival and protein translation, thereby enhancing cell proliferation of normal and malignant cells. Pim-3 is expressed in vital organs, such as the heart, lung, and brain. However, minimal phenotypic changes in Pim-3-deficient mice suggest that Pim-3 may be physiologically dispensable. Pim-3 expression is enhanced in several cancer tissues, particularly those of endoderm-derived organs, including the liver, pancreas, colon, and stomach. The development of hepatocellular carcinoma is accelerated in mice expressing the Pim-3 gene selectively in the liver only when these mice are treated with a hepatocarcinogen, indicating that Pim-3 can act as a promoter but not as an initiator. Moreover, inhibition of Pim-3 expression can retard in vitro cell proliferation of hepatocellular, pancreatic, and colon carcinoma cell lines by promoting cell apoptosis. Furthermore, a Pim-3 kinase inhibitor has been reported to inhibit cell proliferation in an in vivo xenograft model using a human pancreatic cancer cell line without inducing any major adverse effects. Thus, Pim-3 kinase may be a candidate molecule for the development of molecular targeting drugs against cancer.
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Affiliation(s)
- Naofumi Mukaida
- Division of Molecular Bioregulation, Cancer Microenvironment Research Program, Cancer Research Institute, Kanazawa University, Kanazawa, Japan.
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280
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Cancerous inhibitor of PP2A (CIP2A) at diagnosis of chronic myeloid leukemia is a critical determinant of disease progression. Blood 2011; 117:6660-8. [PMID: 21490338 DOI: 10.1182/blood-2010-08-304477] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Prospective identification of patients whose chronic myeloid leukemia (CML) will progress to blast crisis is currently not possible. PP2A is a phosphatase and tumor suppressor that regulates cell proliferation, differentiation, and survival. Cancerous inhibitor of PP2A (CIP2A) is a recently described inhibitor of PP2A in breast and gastric cancer. The aim of this study was to investigate whether CIP2A played a role in CML and whether PP2A or its inhibitor proteins CIP2A or SET could predict clinical outcome. At the time of diagnosis of CML, patients who will later progress to blast crisis have significantly higher levels of CIP2A protein (P < .0001) than patients who do not progress, suggesting that PP2A is functionally inactive. We show that the potential mechanism for disease progression is via altered phosphorylation of the oncogene c-Myc. Knockdown of CIP2A results in increased PP2A activity, decreased c-Myc levels, and a decrease in BCR-ABL1 tyrosine kinase activity. We demonstrate that CIP2A levels at diagnosis can consistently predict patients who will progress to blast crisis. The data show that CIP2A is biologically and clinically important in CML and may be a novel therapeutic target.
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281
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Narayansingh R, Ouellette RJ. Paired box gene 5 may modulate Proviral Integration of Moloney virus 2 gene and protein expression in mature B-cells. Leuk Lymphoma 2011; 52:887-95. [PMID: 21299464 DOI: 10.3109/10428194.2011.553001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Deregulated transcription factor Paired box gene 5 (Pax-5) expression has been implicated in B-cell lymphoma in human disease. Proviral Integration of Moloney virus 2 (Pim-2) kinase may play a role in apoptosis and chemotherapy resistance. We characterized the expression of Pax-5 and Pim-2 in mature B-cell lines and 293T cells transfected with human isoforms of Pax-5. By quantitative real-time polymerase chain reaction (qRT-PCR), we showed that Pax-5 isoforms significantly increased Pim-2 mRNA expression in 293T cells and that mRNAs for both Pax-5 and Pim-2 were two-fold significantly expressed in mature malignant B-cells. Western blot analysis showed that Pim-2 protein expression was increased in 293T cells transiently transfected with human isoforms of Pax-5 and that Pax-5 isoforms and Pim-2 proteins were expressed in mature B-cell lines. By electrophoretic mobility shift analysis, we showed that Pax-5 isoforms were able to bind to the Pim-2 promoter region. Taken together, these results suggest that Pax-5 may act as a transcription factor to modulate the expression of Pim-2 and that both proteins may play a role in the oncogenesis of mature B-cell lymphoma.
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282
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Magnuson NS, Wang Z, Ding G, Reeves R. Why target PIM1 for cancer diagnosis and treatment? Future Oncol 2011; 6:1461-78. [PMID: 20919829 DOI: 10.2217/fon.10.106] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The highly conserved proto-oncogenic protein PIM1 is an unusual serine or threonine kinase, in part because it is constitutively active. Overexpression of PIM1 experimentally leads to tumor formation in mice, while complete knockout of the protein has no observable phenotype. It appears to contribute to cancer development in three major ways when it is overexpressed; by inhibiting apoptosis, by promoting cell proliferation and by promoting genomic instability. Expression in normal tissues is nearly undetectable. However, in hematopoietic malignancies and in a variety of solid tumors, increased PIM1 expression has been shown to correlate with the stage of disease. This characteristic suggests it can serve as a useful biomarker for cancer diagnosis and prognosis. Several specific and potent inhibitors of PIM1’s kinase activity have also been shown to induce apoptotic death of cancer cells, to sensitize cancer cells to chemotherapy and to synergize with other anti-tumor agents, thus making it an attractive therapeutic target.
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Affiliation(s)
- Nancy S Magnuson
- School of Molecular Biosciences, Washington State University, Pullman, WA 99164–7520, USA
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283
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Xu D, Allsop SA, Witherspoon SM, Snider JL, Yeh JJ, Fiordalisi JJ, White CD, Williams D, Cox AD, Baines AT. The oncogenic kinase Pim-1 is modulated by K-Ras signaling and mediates transformed growth and radioresistance in human pancreatic ductal adenocarcinoma cells. Carcinogenesis 2011; 32:488-95. [PMID: 21262926 DOI: 10.1093/carcin/bgr007] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Oncogenic Pim-1 kinase is upregulated in multiple solid cancers, including human pancreatic ductal adenocarcinoma (PDAC), a highly lethal disease with few useful treatment options. Pim-1 is also transcriptionally induced upon oncogenic K-Ras-mediated transformation of the human pancreatic ductal epithelial (HPDE) cell model of PDAC. Given the near ubiquitous presence of mutant K-Ras in PDAC and its critical role in this disease, we wished to study the effects of oncogenic K-Ras signaling on Pim-1 expression, as well as the role of Pim-1 in growth transformation of PDAC cells. Pim-1 protein levels were upregulated in both PDAC cell lines and patient tumor tissues. Furthermore, ectopic oncogenic K-Ras increased Pim-1 expression in human pancreatic nestin-expressing (HPNE) cells, a distinct immortalized cell model of PDAC. Conversely, shRNA-mediated suppression of oncogenic K-Ras decreased Pim-1 protein in PDAC cell lines. These results indicate that oncogenic K-Ras regulates Pim-1 expression. The kinase activity of Pim-1 is constitutively active. Accordingly, shRNA-mediated suppression of Pim-1 in K-Ras-dependent PDAC cell lines decreased Pim-1 activity, as measured by decreased phosphorylation of the pro-apoptotic protein Bad and increased expression of the cyclin-dependent kinase inhibitor p27Kip1. Biological consequences of inhibiting Pim-1 expression included decreases in both anchorage-dependent and -independent cell growth, invasion through Matrigel and radioresistance as measured by standard clonogenic assays. These results indicate that Pim-1 is required for PDAC cell growth, invasion and radioresistance downstream of oncogenic K-Ras. Overall, our studies help to elucidate the role of Pim-1 in PDAC growth transformation and validate Pim-1 kinase as a potential molecular marker for mutated K-Ras activity.
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Affiliation(s)
- Dapeng Xu
- Department of Biology, Cancer Research Program, JLC-Biomedical/Biotechnology Research Institute, North Carolina Central University, Durham, NC 27707, USA
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284
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Abstract
Pim oncogenes are overexpressed in a wide range of tumours from a haematological and epithelial origin. Pim genes encode serine/threonine kinases that have been shown to counteract the increased sensitivity to apoptosis induction that is associated with MYC-driven tumorigenesis. Recently, considerable progress has been made in characterizing the pathways of PIM-mediated survival signalling. Given the unique structure of their active site and the minimal phenotype of mice mutant for all Pim family members, these oncogenes might be promising targets for highly specific and selective drugs with favourable toxicity profiles. In this Review, we discuss the physiological functions and oncogenic activities of Pim kinases.
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Affiliation(s)
- Martijn C Nawijn
- Department of Pathology and Medical Biology, University Medical Center Groningen, University of Groningen, The Netherlands
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285
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Blanco-Aparicio C, Collazo AMG, Oyarzabal J, Leal JF, Albarán MI, Lima FR, Pequeño B, Ajenjo N, Becerra M, Alfonso P, Reymundo MI, Palacios I, Mateos G, Quiñones H, Corrionero A, Carnero A, Pevarello P, Lopez AR, Fominaya J, Pastor J, Bischoff JR. Pim 1 kinase inhibitor ETP-45299 suppresses cellular proliferation and synergizes with PI3K inhibition. Cancer Lett 2010; 300:145-53. [PMID: 21051136 DOI: 10.1016/j.canlet.2010.09.016] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Revised: 09/07/2010] [Accepted: 09/10/2010] [Indexed: 10/18/2022]
Abstract
The serine/threonine Pim 1 kinase is an oncogene whose expression is deregulated in several human cancers. Overexpression of Pim 1 facilitates cell cycle progression and suppresses apoptosis. Hence pharmacologic inhibitors of Pim 1 are of therapeutic interest for cancer. ETP-45299 is a potent and selective inhibitor of Pim 1 that inhibits the phosphorylation of Bad and 4EBP1 in cells and suppresses the proliferation of several non-solid and solid human tumor cell lines. The combination of the PI3K inhibitor GDC-0941 with ETP-45299 was strongly synergistic in MV-4-11 AML cells, indicating that the combination of selective Pim kinase inhibitors and PI3K inhibitor could have clinical benefit.
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286
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Santio NM, Vahakoski RL, Rainio EM, Sandholm JA, Virtanen SS, Prudhomme M, Anizon F, Moreau P, Koskinen PJ. Pim-selective inhibitor DHPCC-9 reveals Pim kinases as potent stimulators of cancer cell migration and invasion. Mol Cancer 2010; 9:279. [PMID: 20958956 PMCID: PMC2978147 DOI: 10.1186/1476-4598-9-279] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Accepted: 10/19/2010] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Pim family kinases are small constitutively active serine/threonine-specific kinases, elevated levels of which have been detected in human hematopoietic malignancies as well as in solid tumours. While we and others have previously shown that the oncogenic Pim kinases stimulate survival of hematopoietic cells, we now examined their putative role in regulating motility of adherent cancer cells. For this purpose, we inhibited Pim kinase activity using a small molecule compound, 1,10-dihydropyrrolo[2,3-a]carbazole-3-carbaldehyde (DHPCC-9), which we had recently identified as a potent and selective inhibitor for all Pim family members. RESULTS We now demonstrate that the Pim kinase inhibitor DHPCC-9 is very effective also in cell-based assays. DHPCC-9 impairs the anti-apoptotic effects of Pim-1 in cytokine-deprived myeloid cells and inhibits intracellular phosphorylation of Pim substrates such as Bad. Moreover, DHPCC-9 slows down migration and invasion of cancer cells derived from either prostate cancer or squamocellular carcinoma patients. Silencing of Pim expression reduces cell motility, while Pim overexpression enhances it, strongly suggesting that the observed effects of DHPCC-9 are dependent on Pim kinase activity. Interestingly, DHPCC-9 also abrogates NFATc-dependent migration of cancer cells, implying that NFATc factors mediate at least part of the pro-migratory effects of Pim kinases. CONCLUSIONS Altogether, our data indicate that DHPCC-9 is not only a powerful tool to investigate physiological effects of the oncogenic Pim family kinases, but also an attractive molecule for drug development to inhibit invasiveness of Pim-overexpressing cancer cells.
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Affiliation(s)
- Niina M Santio
- Turku Centre for Biotechnology, University of Turku and Abo Akademi University, Turku, Finland
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