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Affiliation(s)
- Vinoth Kumar Chenniappan
- Department of Chemistry, Oklahoma State University, 107 Physical Sciences 1, Stillwater, Oklahoma 74078, United States
| | - Sajan Silwal
- Department of Chemistry, Oklahoma State University, 107 Physical Sciences 1, Stillwater, Oklahoma 74078, United States
| | - Ronald J. Rahaim
- Department of Chemistry, Oklahoma State University, 107 Physical Sciences 1, Stillwater, Oklahoma 74078, United States
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Abstract
α,β-Unsaturated amides are important building blocks and are key structural elements in a number of biologically active natural products. Despite their importance and prevalence, few methods exist to prepare conjugated amides directly and modularly. To address this gap, a titanium-promoted coupling of alkynes and isocyanates has been developed. The method is highly stereoselective, producing only the E isomer with good chemoselectivity and regioselectivity (>95/5), for unsymmetrical internal alkynes that contain a steric bias. The reactive titanacyclopentene intermediate formed from the coupling of the alkyne and isocyanate was additionally reacted with various electrophiles to access tetrasubstituted enamides.
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Affiliation(s)
- Vinoth Kumar Chenniappan
- Department of Chemistry, Oklahoma State University , 107 Physical Sciences 1, Stillwater, Oklahoma 74078, United States
| | - Ronald J Rahaim
- Department of Chemistry, Oklahoma State University , 107 Physical Sciences 1, Stillwater, Oklahoma 74078, United States
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3
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Penas C, Govek EE, Fang Y, Ramachandran V, Daniel M, Wang W, Maloof ME, Rahaim RJ, Bibian M, Kawauchi D, Finkelstein D, Han JL, Long J, Li B, Robbins DJ, Malumbres M, Roussel MF, Roush WR, Hatten ME, Ayad NG. Casein kinase 1δ is an APC/C(Cdh1) substrate that regulates cerebellar granule cell neurogenesis. Cell Rep 2015; 11:249-60. [PMID: 25843713 DOI: 10.1016/j.celrep.2015.03.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 12/23/2014] [Accepted: 03/05/2015] [Indexed: 02/07/2023] Open
Abstract
Although casein kinase 1δ (CK1δ) is at the center of multiple signaling pathways, its role in the expansion of CNS progenitor cells is unknown. Using mouse cerebellar granule cell progenitors (GCPs) as a model for brain neurogenesis, we demonstrate that the loss of CK1δ or treatment of GCPs with a highly selective small molecule inhibits GCP expansion. In contrast, CK1δ overexpression increases GCP proliferation. Thus, CK1δ appears to regulate GCP neurogenesis. CK1δ is targeted for proteolysis via the anaphase-promoting complex/cyclosome (APC/C(Cdh1)) ubiquitin ligase, and conditional deletion of the APC/C(Cdh1) activator Cdh1 in cerebellar GCPs results in higher levels of CK1δ. APC/C(Cdh1) also downregulates CK1δ during cell-cycle exit. Therefore, we conclude that APC/C(Cdh1) controls CK1δ levels to balance proliferation and cell-cycle exit in the developing CNS. Similar studies in medulloblastoma cells showed that CK1δ holds promise as a therapeutic target.
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Affiliation(s)
- Clara Penas
- Center for Therapeutic Innovation, Department of Psychiatry and Behavioral Sciences, University of Miami, Miami, FL 33136, USA
| | - Eve-Ellen Govek
- Laboratory of Developmental Neurobiology, The Rockefeller University, New York, NY 10065, USA
| | - Yin Fang
- Laboratory of Developmental Neurobiology, The Rockefeller University, New York, NY 10065, USA
| | - Vimal Ramachandran
- Center for Therapeutic Innovation, Department of Psychiatry and Behavioral Sciences, University of Miami, Miami, FL 33136, USA
| | - Mark Daniel
- Center for Therapeutic Innovation, Department of Psychiatry and Behavioral Sciences, University of Miami, Miami, FL 33136, USA
| | - Weiping Wang
- Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA
| | - Marie E Maloof
- Center for Therapeutic Innovation, Department of Psychiatry and Behavioral Sciences, University of Miami, Miami, FL 33136, USA
| | - Ronald J Rahaim
- Department of Chemistry, Scripps Florida, Jupiter, FL 33458, USA
| | - Mathieu Bibian
- Department of Chemistry, Scripps Florida, Jupiter, FL 33458, USA
| | - Daisuke Kawauchi
- Department of Tumor Cell Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - David Finkelstein
- Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Jeng-Liang Han
- Department of Chemistry, Scripps Florida, Jupiter, FL 33458, USA
| | - Jun Long
- Departments of Surgery and Biochemistry and Molecular Biology, Molecular Oncology Program, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Bin Li
- Departments of Surgery and Biochemistry and Molecular Biology, Molecular Oncology Program, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - David J Robbins
- Departments of Surgery and Biochemistry and Molecular Biology, Molecular Oncology Program, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Marcos Malumbres
- Cell Division and Cancer Group, Spanish National Cancer Research Centre, 28029 Madrid, Spain
| | - Martine F Roussel
- Department of Tumor Cell Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - William R Roush
- Department of Chemistry, Scripps Florida, Jupiter, FL 33458, USA
| | - Mary E Hatten
- Laboratory of Developmental Neurobiology, The Rockefeller University, New York, NY 10065, USA
| | - Nagi G Ayad
- Center for Therapeutic Innovation, Department of Psychiatry and Behavioral Sciences, University of Miami, Miami, FL 33136, USA.
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Silwal S, Rahaim RJ. Regioselective Synthesis of Enones via a Titanium-Promoted Coupling of Unsymmetrical Alkynes with Weinreb Amides. J Org Chem 2014; 79:8469-76. [DOI: 10.1021/jo5014417] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sajan Silwal
- Department
of Chemistry, Oklahoma State University, 107 Physical Sciences 1, Stillwater, Oklahoma 74078, United States
| | - Ronald J. Rahaim
- Department
of Chemistry, Oklahoma State University, 107 Physical Sciences 1, Stillwater, Oklahoma 74078, United States
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Penas C, Ramachandran V, Simanski S, Lee C, Madoux F, Rahaim RJ, Chauhan R, Barnaby O, Schurer S, Hodder P, Steen J, Roush WR, Ayad NG. Casein kinase 1δ-dependent Wee1 protein degradation. J Biol Chem 2014; 289:18893-903. [PMID: 24817118 DOI: 10.1074/jbc.m114.547661] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Eukaryotic mitotic entry is controlled by Cdk1, which is activated by the Cdc25 phosphatase and inhibited by Wee1 tyrosine kinase, a target of the ubiquitin proteasome pathway. Here we use a reporter of Wee1 degradation, K328M-Wee1-luciferase, to screen a kinase-directed chemical library. Hit profiling identified CK1δ-dependent Wee1 degradation. Small-molecule CK1δ inhibitors specifically disrupted Wee1 destruction and arrested HeLa cell proliferation. Pharmacological inhibition, siRNA knockdown, or conditional deletion of CK1δ also reduced Wee1 turnover. Thus, these studies define a previously unappreciated role for CK1δ in controlling the cell cycle.
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Affiliation(s)
- Clara Penas
- From the Center for Therapeutic Innovation, Department of Psychiatry and Behavioral Sciences and
| | - Vimal Ramachandran
- From the Center for Therapeutic Innovation, Department of Psychiatry and Behavioral Sciences and
| | | | - Choogon Lee
- the Department of Biological Sciences, College of Medicine, Florida State University, Tallahassee, Florida 32306, and
| | - Franck Madoux
- Lead Identification Division, Translational Research Institute, and
| | - Ronald J Rahaim
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458
| | - Ruchi Chauhan
- the Department of Neurology, Children's Hospital, Boston, Boston, Massachusetts 02115
| | - Omar Barnaby
- the Department of Neurology, Children's Hospital, Boston, Boston, Massachusetts 02115
| | - Stephan Schurer
- Department of Pharmacology, University of Miami, Miami, Florida 33136
| | - Peter Hodder
- Lead Identification Division, Translational Research Institute, and
| | - Judith Steen
- the Department of Neurology, Children's Hospital, Boston, Boston, Massachusetts 02115
| | - William R Roush
- Department of Chemistry, Scripps Florida, Jupiter, Florida 33458
| | - Nagi G Ayad
- From the Center for Therapeutic Innovation, Department of Psychiatry and Behavioral Sciences and
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Affiliation(s)
- Jill A. Muchnij
- 107 Physical
Sciences 1,
Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Farai B. Kwaramba
- 107 Physical
Sciences 1,
Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Ronald J. Rahaim
- 107 Physical
Sciences 1,
Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, United States
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Bibian M, Rahaim RJ, Choi JY, Noguchi Y, Schürer S, Chen W, Nakanishi S, Licht K, Rosenberg LH, Li L, Feng Y, Cameron MD, Duckett DR, Cleveland JL, Roush WR. Development of highly selective casein kinase 1δ/1ε (CK1δ/ε) inhibitors with potent antiproliferative properties. Bioorg Med Chem Lett 2013; 23:4374-80. [PMID: 23787102 PMCID: PMC3783656 DOI: 10.1016/j.bmcl.2013.05.075] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2013] [Revised: 05/20/2013] [Accepted: 05/21/2013] [Indexed: 12/11/2022]
Abstract
The development of a series of potent and highly selective casein kinase 1δ/ε (CK1δ/ε) inhibitors is described. Starting from a purine scaffold inhibitor (SR-653234) identified by high throughput screening, we developed a series of potent and highly kinase selective inhibitors, including SR-2890 and SR-3029, which have IC₅₀ ≤ 50 nM versus CK1δ. The two lead compounds have ≤100 nM EC50 values in MTT assays against the human A375 melanoma cell line and have physical, in vitro and in vivo PK properties suitable for use in proof of principle animal xenograft studies against human cancer cell lines.
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Affiliation(s)
- Mathieu Bibian
- Department of Chemistry, Scripps Florida, 130 Scripps Way, Jupiter, FL 33458, United States
| | - Ronald J. Rahaim
- Department of Chemistry, Scripps Florida, 130 Scripps Way, Jupiter, FL 33458, United States
| | - Jun Yong Choi
- Department of Chemistry, Scripps Florida, 130 Scripps Way, Jupiter, FL 33458, United States
| | - Yoshihiko Noguchi
- Department of Chemistry, Scripps Florida, 130 Scripps Way, Jupiter, FL 33458, United States
| | - Stephan Schürer
- Department of Molecular and Cellular Pharmacology and Center for Computational Science, University of Miami, 1120 NW 14th St., Miami, FL 33136, United States
| | - Weimin Chen
- Department of Molecular Therapeutics, Scripps Florida, 130 Scripps Way, Jupiter, FL 33458, United States
| | - Shima Nakanishi
- Department of Cancer Biology, Scripps Florida, 130 Scripps Way, Jupiter, FL 33458, United States
| | - Konstantin Licht
- Department of Cancer Biology, Scripps Florida, 130 Scripps Way, Jupiter, FL 33458, United States
| | - Laura H. Rosenberg
- Department of Molecular Therapeutics, Scripps Florida, 130 Scripps Way, Jupiter, FL 33458, United States
| | - Lin Li
- Department of Molecular Therapeutics, Scripps Florida, 130 Scripps Way, Jupiter, FL 33458, United States
| | - Yangbo Feng
- Department of Chemistry, Scripps Florida, 130 Scripps Way, Jupiter, FL 33458, United States
| | - Michael D. Cameron
- Department of Molecular Therapeutics, Scripps Florida, 130 Scripps Way, Jupiter, FL 33458, United States
| | - Derek R. Duckett
- Department of Molecular Therapeutics, Scripps Florida, 130 Scripps Way, Jupiter, FL 33458, United States
| | - John L. Cleveland
- Department of Cancer Biology, Scripps Florida, 130 Scripps Way, Jupiter, FL 33458, United States
| | - William R. Roush
- Department of Chemistry, Scripps Florida, 130 Scripps Way, Jupiter, FL 33458, United States
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Abstract
Catalytic Pd(OAc)(2) and polymethylhydrosiloxane (PMHS), in conjunction with aqueous KF, and a catalytic amount of an aromatic chloride, effects the chemo-, regio-, and stereoselective deoxygenation of benzylic oxygenated substrates at room temperature in THF. Preliminary mechanistic experiments suggest the process to involve palladium-nanoparticle-catalyzed hydrosilylation followed by C-O reduction. The chloroarene additive appears to facilitate the hydrogenolysis process through the slow controlled release of HCl.
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Affiliation(s)
| | - Robert E. Maleczka
- Department of Chemistry, Michigan State University, East Lansing, MI 48824
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Affiliation(s)
- Ronald J. Rahaim
- Broad Institute of Harvard and MIT Program in Chemical Biology, 7 Cambridge Center, Cambridge, Massachusetts 02142
| | - Jared T. Shaw
- Broad Institute of Harvard and MIT Program in Chemical Biology, 7 Cambridge Center, Cambridge, Massachusetts 02142
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Abstract
[reaction: see text] Room-temperature reduction of aromatic nitro groups to amines can be accomplished in high yield, with wide functional group tolerance and short reaction times (30 min) using a combination of palladium(II) acetate, aqueous potassium fluoride, and polymethylhydrosiloxane (PMHS). Replacing PMHS/KF with triethylsilane allows aliphatic nitro groups to be reduced to their hydroxylamines.
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Affiliation(s)
- Ronald J Rahaim
- Department of Chemistry, Michigan State University, East Lansing, 48824, USA
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Rahaim RJ, Maleczka RE. Room temperature dehalogenation of chloroarenes by polymethylhydrosiloxane (PMHS) under palladium catalysis. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)02212-8] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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