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Er-Rajy M, El Fadili M, Faris A, Zarougui S, Elhallaoui M. Design of potential anti-cancer agents as COX-2 inhibitors, using 3D-QSAR modeling, molecular docking, oral bioavailability proprieties, and molecular dynamics simulation. Anticancer Drugs 2024; 35:117-128. [PMID: 38018861 DOI: 10.1097/cad.0000000000001492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
Modeling the structural properties of novel morpholine-bearing 1, 5-diaryl-diazole derivatives as potent COX-2 inhibitor, two proposed models based on CoMFA and CoMSIA were evaluated by external and internal validation methods. Partial least squares analysis produced statistically significant models with Q 2 values of 0.668 and 0.652 for CoMFA and CoMSIA, respectively, and also a significant non-validated correlation coefficient R² with values of 0.882 and 0.878 for CoMFA and CoMSIA, respectively. Both models met the requirements of Golbraikh and Tropsha, which means that both models are consistent with all validation techniques. Analysis of the CoMFA and CoMSIA contribution maps and molecular docking revealed that the R1 substituent has a very significant effect on their biological activity. The most active molecules were evaluated for their thermodynamic stability by performing MD simulations for 100 ns; it was revealed that the designed macromolecular ligand complex with 3LN1 protein exhibits a high degree of structural and conformational stability. Based on these results, we predicted newly designed compounds, which have acceptable oral bioavailability properties and would have high synthetic accessibility.
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Affiliation(s)
- Mohammed Er-Rajy
- LIMAS Laboratory, Faculty of Sciences Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
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Silnitsky S, Rubin SJS, Zerihun M, Qvit N. An Update on Protein Kinases as Therapeutic Targets-Part I: Protein Kinase C Activation and Its Role in Cancer and Cardiovascular Diseases. Int J Mol Sci 2023; 24:17600. [PMID: 38139428 PMCID: PMC10743896 DOI: 10.3390/ijms242417600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/10/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023] Open
Abstract
Protein kinases are one of the most significant drug targets in the human proteome, historically harnessed for the treatment of cancer, cardiovascular disease, and a growing number of other conditions, including autoimmune and inflammatory processes. Since the approval of the first kinase inhibitors in the late 1990s and early 2000s, the field has grown exponentially, comprising 98 approved therapeutics to date, 37 of which were approved between 2016 and 2021. While many of these small-molecule protein kinase inhibitors that interact orthosterically with the protein kinase ATP binding pocket have been massively successful for oncological indications, their poor selectively for protein kinase isozymes have limited them due to toxicities in their application to other disease spaces. Thus, recent attention has turned to the use of alternative allosteric binding mechanisms and improved drug platforms such as modified peptides to design protein kinase modulators with enhanced selectivity and other pharmacological properties. Herein we review the role of different protein kinase C (PKC) isoforms in cancer and cardiovascular disease, with particular attention to PKC-family inhibitors. We discuss translational examples and carefully consider the advantages and limitations of each compound (Part I). We also discuss the recent advances in the field of protein kinase modulators, leverage molecular docking to model inhibitor-kinase interactions, and propose mechanisms of action that will aid in the design of next-generation protein kinase modulators (Part II).
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Affiliation(s)
- Shmuel Silnitsky
- The Azrieli Faculty of Medicine in the Galilee, Bar-Ilan University, Henrietta Szold St. 8, Safed 1311502, Israel; (S.S.); (M.Z.)
| | - Samuel J. S. Rubin
- Department of Medicine, School of Medicine, Stanford University, 300 Pasteur Drive, Stanford, CA 94305, USA;
| | - Mulate Zerihun
- The Azrieli Faculty of Medicine in the Galilee, Bar-Ilan University, Henrietta Szold St. 8, Safed 1311502, Israel; (S.S.); (M.Z.)
| | - Nir Qvit
- The Azrieli Faculty of Medicine in the Galilee, Bar-Ilan University, Henrietta Szold St. 8, Safed 1311502, Israel; (S.S.); (M.Z.)
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3
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Er-Rajy M, El Fadili M, Mujwar S, Zarougui S, Elhallaoui M. Design of novel anti-cancer drugs targeting TRKs inhibitors based 3D QSAR, molecular docking and molecular dynamics simulation. J Biomol Struct Dyn 2023; 41:11657-11670. [PMID: 36695085 DOI: 10.1080/07391102.2023.2170471] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Accepted: 12/22/2022] [Indexed: 01/26/2023]
Abstract
Tropomyosin receptor kinase (TRK) enzymes are responsible for different types of tumors caused by neurotrophic tyrosine receptor kinase gene fusion and have been identified as an effective target for anticancer therapy. The study of the mechanism between polo-like kinase (PLKs) and pyrazol inhibitors was performed using 3D-QSAR modeling, molecular docking, and MD simulations in order to design high-activity inhibitors. The HQSAR (Q2 = 0.793, R2 = 0.917, R2ext = 0.961), CoMFA (Q2 = 0.582, R2 = 0.722, R2ext = 0.951), CoMSIA/SE (Q2 = 0.603, R2 = 0.801, R2ext = 0.849), and Topomer CoMFA (Q2 = 0.726, R2 = 0.992, R2ext = 0.717) showed good reliability and predictability. All models have been successfully tested by external validation, so all five established models are reliable. The analysis of the different contour maps of different models gives structural information to improve the inhibitory function. Molecular docking results show that the amino acids Met 592, GLU 590, LEU 657, VAL 524, and PHE 589 are the active sites of the tropomyosin receptor TRKs. The results obtained by MD showed that compound 19i could form a more stable complex protein (PDB id: 5KVT). Based on these results, we developed new compounds and their expected inhibitory activities. The results of physicochemical and ADME-Tox properties showed that the four proposed molecules are orally bioavailable, and they are not toxic in the Ames test. Thus, these results would provide modeling information that could help experimental researchers find TRK type I inhibitors more efficiently.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Mohammed Er-Rajy
- LIMAS Laboratory, Faculty of Sciences Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Mohamed El Fadili
- LIMAS Laboratory, Faculty of Sciences Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Somdutt Mujwar
- Chitkara College of Pharmacy, Chitkara University, Rajpura, Punjab, India
| | - Sara Zarougui
- LIMAS Laboratory, Faculty of Sciences Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Menana Elhallaoui
- LIMAS Laboratory, Faculty of Sciences Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
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4
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Katti S, Igumenova TI. Structural insights into C1-ligand interactions: Filling the gaps by in silico methods. Adv Biol Regul 2021; 79:100784. [PMID: 33526356 DOI: 10.1016/j.jbior.2020.100784] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 12/24/2020] [Accepted: 12/28/2020] [Indexed: 02/05/2023]
Abstract
Protein Kinase C isoenzymes (PKCs) are the key mediators of the phosphoinositide signaling pathway, which involves regulated hydrolysis of phosphatidylinositol (4,5)-bisphosphate to diacylglycerol (DAG) and inositol-1,4,5-trisphosphate. Dysregulation of PKCs is implicated in many human diseases making this class of enzymes an important therapeutic target. Specifically, the DAG-sensing cysteine-rich conserved homology-1 (C1) domains of PKCs have emerged as promising targets for pharmaceutical modulation. Despite significant progress, the rational design of the C1 modulators remains challenging due to difficulties associated with structure determination of the C1-ligand complexes. Given the dearth of experimental structural data, computationally derived models have been instrumental in providing atomistic insight into the interactions of the C1 domains with PKC agonists. In this review, we provide an overview of the in silico approaches for seven classes of C1 modulators and outline promising future directions.
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Affiliation(s)
- Sachin Katti
- Department of Biochemistry and Biophysics, Texas A&M University, 300 Olsen Boulevard, College Station, TX, 77843, United States
| | - Tatyana I Igumenova
- Department of Biochemistry and Biophysics, Texas A&M University, 300 Olsen Boulevard, College Station, TX, 77843, United States.
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Kim Y, Sengupta S, Sim T. Natural and Synthetic Lactones Possessing Antitumor Activities. Int J Mol Sci 2021; 22:ijms22031052. [PMID: 33494352 PMCID: PMC7865919 DOI: 10.3390/ijms22031052] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/14/2021] [Accepted: 01/16/2021] [Indexed: 12/29/2022] Open
Abstract
Cancer is one of the leading causes of death globally, accounting for an estimated 8 million deaths each year. As a result, there have been urgent unmet medical needs to discover novel oncology drugs. Natural and synthetic lactones have a broad spectrum of biological uses including anti-tumor, anti-helminthic, anti-microbial, and anti-inflammatory activities. Particularly, several natural and synthetic lactones have emerged as anti-cancer agents over the past decades. In this review, we address natural and synthetic lactones focusing on their anti-tumor activities and synthetic routes. Moreover, we aim to highlight our journey towards chemical modification and biological evaluation of a resorcylic acid lactone, L-783277 (4). We anticipate that utilization of the natural and synthetic lactones as novel scaffolds would benefit the process of oncology drug discovery campaigns based on natural products.
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Affiliation(s)
- Younghoon Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea;
- Severance Biomedical Science Institute, Graduate School of Medical Science (Brain Korea 21 Project), College of Medicine, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea;
| | - Sandip Sengupta
- Severance Biomedical Science Institute, Graduate School of Medical Science (Brain Korea 21 Project), College of Medicine, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea;
| | - Taebo Sim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Korea;
- Severance Biomedical Science Institute, Graduate School of Medical Science (Brain Korea 21 Project), College of Medicine, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea;
- Correspondence: ; Tel.: +82-2-2228-0797
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6
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Mannino MP, Yasomanee JP, Demchenko AV. Investigation of the H-bond-mediated aglycone delivery reaction in application to the synthesis of β-glucosides. Carbohydr Res 2018; 470:1-7. [PMID: 30286335 PMCID: PMC6215728 DOI: 10.1016/j.carres.2018.09.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 09/10/2018] [Accepted: 09/10/2018] [Indexed: 01/16/2023]
Abstract
In an attempt to refine the H-bond-mediated Aglycone Delivery (HAD) glycosylation reaction reported herein is the synthesis of β-glucosides using an ethylthio glucoside donor equipped with the remote 6-O-picoloyl substituent. Upon examining various aliphatic, aromatic, and carbohydrate acceptors, it was determined that both electronic and steric factors may greatly affect the stereoselectivity of the HAD reaction with this donor.
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Affiliation(s)
- Michael P. Mannino
- Department of Chemistry and Biochemistry, University of Missouri – St. Louis One University Boulevard, St. Louis, MO 63121, USA Fax: (+) 1-314-516-5342;
| | - Jagodige P. Yasomanee
- Department of Chemistry and Biochemistry, University of Missouri – St. Louis One University Boulevard, St. Louis, MO 63121, USA Fax: (+) 1-314-516-5342;
| | - Alexei V. Demchenko
- Department of Chemistry and Biochemistry, University of Missouri – St. Louis One University Boulevard, St. Louis, MO 63121, USA Fax: (+) 1-314-516-5342;
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7
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Baumann DO, McGowan KM, Kedei N, Peach ML, Blumberg PM, Keck GE. Synthesis and Biological Evaluation of Several Bryostatin Analogues Bearing a Diacylglycerol Lactone C-Ring. J Org Chem 2016; 81:7862-83. [PMID: 27494208 PMCID: PMC6957265 DOI: 10.1021/acs.joc.6b01516] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
As an initial step in designing a simplified bryostatin hybrid molecule, three bryostatin analogues bearing a diacylglycerol lactone-based C-ring, which possessed the requisite pharmacophores for binding to protein kinase C (PKC) together with a modified bryostatin-like A- and B-ring region, were synthesized and evaluated. Merle 46 and Merle 47 exhibited binding affinity to PKC alpha with Ki values of 7000 ± 990 and 4940 ± 470 nM, respectively. Reinstallation of the trans-olefin and gem-dimethyl group present in bryostatin 1 in Merle 48 resulted in improved binding affinity, 363 ± 42 nM. While Merle 46 and 47 were only marginally active biologically, Merle 48 showed sufficient activity on the U937 cells to confirm that it was PMA-like for growth and attachment, as predicted by the substitution pattern of its A- and B-rings.
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Affiliation(s)
- David O. Baumann
- Department of Chemistry, University of Utah, 315 S 1300 E, RM 2020, Salt Lake City, Utah 84112, United States
| | - Kevin M. McGowan
- Department of Chemistry, University of Utah, 315 S 1300 E, RM 2020, Salt Lake City, Utah 84112, United States
| | - Noemi Kedei
- Laboratory of Cancer Biology and Genetics, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland 20892-4255, United States
| | - Megan L. Peach
- Basic Science Program, Leidos Biomedical Research, Inc., Chemical Biology Laboratory, Frederick National Laboratory for Cancer Research, Frederick, Maryland 21702, United States
| | - Peter M. Blumberg
- Laboratory of Cancer Biology and Genetics, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland 20892-4255, United States
| | - Gary E. Keck
- Department of Chemistry, University of Utah, 315 S 1300 E, RM 2020, Salt Lake City, Utah 84112, United States
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8
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Wang T, Goodall ML, Gonzales P, Sepulveda M, Martin KR, Gately S, MacKeigan JP. Synthesis of Improved Lysomotropic Autophagy Inhibitors. J Med Chem 2015; 58:3025-35. [DOI: 10.1021/jm501586m] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Tong Wang
- Translational
Drug Development (TD2, LLC), Scottsdale, Arizona 85259, United States
| | - Megan L. Goodall
- Laboratory
of Systems Biology, Van Andel Research Institute, Grand Rapids, Michigan 49503, United States
- Genetics
Graduate Program, Michigan State University, East Lansing, Michigan 48824, United States
| | - Paul Gonzales
- Translational
Drug Development (TD2, LLC), Scottsdale, Arizona 85259, United States
| | - Mario Sepulveda
- Translational
Drug Development (TD2, LLC), Scottsdale, Arizona 85259, United States
| | - Katie R. Martin
- Laboratory
of Systems Biology, Van Andel Research Institute, Grand Rapids, Michigan 49503, United States
| | - Stephen Gately
- Translational
Drug Development (TD2, LLC), Scottsdale, Arizona 85259, United States
| | - Jeffrey P. MacKeigan
- Laboratory
of Systems Biology, Van Andel Research Institute, Grand Rapids, Michigan 49503, United States
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9
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Pelà M, Saxena P, Luciani R, Santucci M, Ferrari S, Marverti G, Marraccini C, Martello A, Pirondi S, Genovese F, Salvadori S, D’Arca D, Ponterini G, Costi MP, Guerrini R. Optimization of Peptides That Target Human Thymidylate Synthase to Inhibit Ovarian Cancer Cell Growth. J Med Chem 2014; 57:1355-67. [DOI: 10.1021/jm401574p] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michela Pelà
- Department of Chemical and Pharmaceutical Sciences, University of Ferrara, via Fossato di Mortara 17-19, 44100 Ferrara, Italy
| | - Puneet Saxena
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Rosaria Luciani
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Matteo Santucci
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Stefania Ferrari
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Gaetano Marverti
- Department of Biomedical Sciences, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, via Campi 287, 41125 Modena, Italy
| | - Chiara Marraccini
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Andrea Martello
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Silvia Pirondi
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Filippo Genovese
- C.I.G.S. (Centro Interdipartimentale Grandi Strumenti), University of Modena and Reggio Emilia, via Campi 213/A, 41125 Modena, Italy
| | - Severo Salvadori
- Department of Chemical and Pharmaceutical Sciences, University of Ferrara, via Fossato di Mortara 17-19, 44100 Ferrara, Italy
- LTTA (Laboratorio per le Tecnologie delle Terapie Avanzate), via Fossato di Mortara 17-19, 44100 Ferrara, Italy
| | - Domenico D’Arca
- Department of Biomedical Sciences, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, via Campi 287, 41125 Modena, Italy
| | - Glauco Ponterini
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Maria Paola Costi
- Department of Life Sciences, University of Modena and Reggio Emilia, via Campi, 183, 41125 Modena, Italy
| | - Remo Guerrini
- Department of Chemical and Pharmaceutical Sciences, University of Ferrara, via Fossato di Mortara 17-19, 44100 Ferrara, Italy
- LTTA (Laboratorio per le Tecnologie delle Terapie Avanzate), via Fossato di Mortara 17-19, 44100 Ferrara, Italy
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10
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Protein-protein interface-binding peptides inhibit the cancer therapy target human thymidylate synthase. Proc Natl Acad Sci U S A 2011; 108:E542-9. [PMID: 21795601 DOI: 10.1073/pnas.1104829108] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Human thymidylate synthase is a homodimeric enzyme that plays a key role in DNA synthesis and is a target for several clinically important anticancer drugs that bind to its active site. We have designed peptides to specifically target its dimer interface. Here we show through X-ray diffraction, spectroscopic, kinetic, and calorimetric evidence that the peptides do indeed bind at the interface of the dimeric protein and stabilize its di-inactive form. The "LR" peptide binds at a previously unknown binding site and shows a previously undescribed mechanism for the allosteric inhibition of a homodimeric enzyme. It inhibits the intracellular enzyme in ovarian cancer cells and reduces cellular growth at low micromolar concentrations in both cisplatin-sensitive and -resistant cells without causing protein overexpression. This peptide demonstrates the potential of allosteric inhibition of hTS for overcoming platinum drug resistance in ovarian cancer.
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11
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Fujioka H, Minamitsuji Y, Kubo O, Senami K, Maegawa T. The reaction of acetal-type protective groups in combination with TMSOTf and 2,2′-bipyridyl; mild and chemoselective deprotection and direct conversion to other protective groups. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.02.048] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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12
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Giménez-Oya V, Villacañas Ó, Obiol-Pardo C, Antolin-Llovera M, Rubio-Martinez J, Imperial S. Design of novel ligands of CDP-methylerythritol kinase by mimicking direct protein-protein and solvent-mediated interactions. J Mol Recognit 2010; 24:71-80. [DOI: 10.1002/jmr.1024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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13
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Sun MK, Alkon DL. Protein kinase C activators as synaptogenic and memory therapeutics. Arch Pharm (Weinheim) 2010; 342:689-98. [PMID: 19899099 DOI: 10.1002/ardp.200900050] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The last decade has witnessed a rapid progress in understanding of the molecular cascades that may underlie memory and memory disorders. Among the critical players, activity of protein kinase C (PKC) isoforms is essential for many types of learning and memory and their dysfunction, and is critical in memory disorders. PKC inhibition and functional deficits lead to an impairment of various types of learning and memory, consistent with the observations that neurotoxic amyloid inhibits PKC activity and that transgenic animal models with PKCbeta deficit exhibit impaired capacity in cognition. In addition, PKC isozymes play a regulatory role in amyloid production and accumulation. Restoration of the impaired PKC signal pathway pharmacologically results in an enhanced memory capacity and synaptic remodeling / repair and synaptogenesis, and, therefore, represents a potentially important strategy for the treatment of memory disorders, including Alzheimer's dementia. The PKC activators, especially those that are isozyme-specific, are a new class of drug candidates that may be developed as future memory therapeutics.
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Affiliation(s)
- Miao-Kun Sun
- Blanchette Rockefeller Neurosciences Institute, Rockville, MD 20850, USA.
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14
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Abstract
HIV-1 integrase catalyzes terminal cleavage at the 3' end of the proviral DNA, removing a pair of bases and causing strand transfer by joining the 3' end to 5'-phosphates in the target DNA. Several aryl 1,3-diketo acids that can inhibit the strand transfer reaction of HIV-1 IN have been identified. Here we synthesized a new series of compounds with a chromone or chromanone ring as conformationally constrained scaffolds of 1,3-diketo acids, and then tested their ability to inhibit HIV-1 IN-mediated strand transfer. All compounds moderately inhibited HIV-1 IN activity, indicating that the conformational restriction of one keto group into a chromone or chromanone ring decreases inhibition of the HIV-1 IN strand transfer.
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15
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Fujioka H, Okitsu T, Ohnaka T, Sawama Y, Kubo O, Okamoto K, Kita Y. Reaction of Tetrahydropyranyl Ethers with Triethylsilyl Trifluoromethanesulfonate–2,4,6-Collidine Combination: Speculation on the Intermediate, Efficient Deprotection, and Application to Efficient Ring-Closing Metathesis as a Tether. Adv Synth Catal 2007. [DOI: 10.1002/adsc.200600572] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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Murelli RP, Cheung AK, Snapper ML. Conformationally Restricted (+)-Cacospongionolide B Analogues. Influence on Secretory Phospholipase A2 Inhibition. J Org Chem 2006; 72:1545-52. [PMID: 17315974 DOI: 10.1021/jo061407a] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new approach to (+)-cacospongionolide was developed to access conformationally restricted variants of the natural product. The flexible aliphatic region between the decalin and side chain portion of the natural product was replaced with alkenyl and alkynyl linkers to probe the influence of structural rigidity in the inhibition of secretary phospholipase A2 (sPLA2). It was found that when the aliphatic section is replaced with a Z-olefin or an alkyne, sPLA2 inhibitory activity suffered relative to the natural product; however, an E-olefin-containing analogue led to an enhanced activity. These results suggest that preferred sPLA2 binding conformation of the natural product is similar to the geometry of the E-olefin-containing analogue.
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Affiliation(s)
- Ryan P Murelli
- Department of Chemistry, Merkert Chemistry Center, Boston College, 2609 Beacon Street, Chestnut Hill, MA 02467, USA
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17
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Hazeldine ST, Polin L, Kushner J, White K, Corbett TH, Horwitz JP. Synthesis and biological evaluation of conformationally constrained analogs of the antitumor agents XK469 and SH80. Part 5. Bioorg Med Chem 2006; 14:2462-7. [PMID: 16337128 DOI: 10.1016/j.bmc.2005.11.036] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2005] [Revised: 11/14/2005] [Accepted: 11/14/2005] [Indexed: 11/22/2022]
Abstract
Conformational restriction of bioactive molecules offers the possibility of generating structures of increased potency. To this end, a synthesis has been achieved of (R,S)-2-[(8-chlorobenzofurano[2,3-b]quinolinyl)oxy]propionic acid (12a), a highly rigidified, polycyclic analog of 2-[4-[(7-chloro-2-quinoxalinyl)oxy]phenoxy]propionic acid (2a, XK469). Efforts to effect the same synthesis of the corresponding 8-bromo-derivative led to a mixture of intermediate, 8-chloro (9a), and 8-bromo-2-hydroxybenzofurano[2,3-b]quinoline (9b), generated by halogen-exchange, via an aromatic S(RN)1(A(RN)1) reaction of precursor, 8b, with pyridine hydrochloride. The presumption that conformational restriction of 1b-12a might enhance the antitumor potency of the latter has not been sustained. In fact, 12a proved to be significantly less active than 1b. However, it is apparent that virtually all of the spatial and steric properties of 12a, necessary for improved activity, including the disposition of the 2-oxypropionic acid side chain remain to be identified.
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Affiliation(s)
- Stuart T Hazeldine
- Department of Internal Medicine, Division of Hematology and Oncology, Wayne State University School of Medicine, Barbara Ann Karmanos Cancer Institute, Detroit, MI, USA
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Chang YP, Chu YH. Using surface plasmon resonance to directly determine binding affinities of combinatorially selected cyclopeptides and their linear analogs to a streptavidin chip. Anal Biochem 2005; 340:74-9. [PMID: 15802132 DOI: 10.1016/j.ab.2005.01.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2004] [Indexed: 11/28/2022]
Abstract
In our recent report, several HPQ-containing streptavidin ligands were identified from a structurally constrained combinatorial library, and the relative affinities in IC(50) of these tight-binding ligands were revealed by a captured enzyme-linked immunosorbent assay. In the present work, surface plasmon resonance was employed to directly evaluate the binding affinities between immobilized streptavidin and combinatorially selected ligands. The equilibrium dissociation constants and kinetic on/off rates of a previously identified N-to-side chain and newly synthesized N-to-C cyclopeptides were readily deduced using Scatchard analysis and computational simulation. It was found that both cyclopeptides bound streptavidin far more tightly than its linear counterpart ( approximately 1000-fold), while the reversed (QPH) linear and cyclic peptidyl ligands were hardly recognized by streptavidin. Consequently, not only was the binding specificity of synthetic ligands distinguished qualitatively but also the entropic advantage of conformationally constrained cyclopeptides over their linear forms was demonstrated quantitatively by surface plasmon resonance.
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Affiliation(s)
- Yi-Pin Chang
- Department of Chemistry and Biochemistry, National Chung Cheng University, Chia-Yi, Taiwan 621, Republic of China
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Sun MK, Alkon DL. Protein kinase C substrate activators: potential as novel antidepressants. Drug Dev Res 2005. [DOI: 10.1002/ddr.20019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Zhou BN, Tang S, Johnson RK, Mattern MP, Lazo JS, Sharlow ER, Harich K, Kingston DG. New glycolipid inhibitors of Myt1 kinase. Tetrahedron 2005. [DOI: 10.1016/j.tet.2004.11.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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