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Sun Q, Biswas A, Lyumkis D, Levy R, Deng N. Elucidating the Molecular Determinants of the Binding Modes of a Third-Generation HIV-1 Integrase Strand Transfer Inhibitor: The Importance of Side Chain and Solvent Reorganization. Viruses 2024; 16:76. [PMID: 38257776 DOI: 10.3390/v16010076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 11/25/2023] [Revised: 12/21/2023] [Accepted: 12/28/2023] [Indexed: 01/24/2024] Open
Abstract
The first- and second-generation clinically used HIV-1 integrase (IN) strand transfer inhibitors (INSTIs) are key components of antiretroviral therapy (ART), which work by blocking the integration step in the HIV-1 replication cycle that is catalyzed by a nucleoprotein assembly called an intasome. However, resistance to even the latest clinically used INSTIs is beginning to emerge. Developmental third-generation INSTIs, based on naphthyridine scaffolds, are promising candidates to combat drug-resistant viral variants. Among these novel INSTIs, compound 4f exhibits two distinct conformations when binding with intasomes from HIV-1 and the closely related prototype foamy virus (PFV) despite the high structural similarity of their INSTI binding pockets. The molecular mechanism and the key active site residues responsible for these differing binding modes in closely related intasomes remain elusive. To unravel the molecular determinants governing the two distinct binding modes, we applied a novel molecular dynamics-based free energy method that utilizes alchemical pathways to overcome the sampling challenges associated with transitioning between the two bound conformations of ligand 4f within the crowded environments of the INSTI binding pockets in these intasomes. The calculated conformational free energies successfully recapitulate the experimentally observed binding mode preferences in the two viral intasomes. Analysis of the simulated structures suggests that the observed binding mode preferences are caused by amino acid residue differences in both the front and the central catalytic sub-pocket of the INSTI binding site in HIV-1 and PFV. Additional free energy calculations on mutants of HIV-1 and PFV revealed that while both sub-pockets contribute to binding mode selection, the central sub-pocket plays a more important role. These results highlight the importance of both side chain and solvent reorganization, as well as the conformational entropy in determining the ligand binding mode, and will help inform the development of more effective INSTIs for combatting drug-resistant viral variants.
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Affiliation(s)
- Qinfang Sun
- Center for Biophysics and Computational Biology and Department of Chemistry, Temple University, Philadelphia, PA 19122, USA
| | - Avik Biswas
- Laboratory of Genetics, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
- Department of Physics, University of California San Diego, La Jolla, CA 92093, USA
| | - Dmitry Lyumkis
- Laboratory of Genetics, The Salk Institute for Biological Studies, La Jolla, CA 92037, USA
- Graduate Schools for Biological Sciences, Section of Molecular Biology, University of California San Diego, La Jolla, CA 92093, USA
| | - Ronald Levy
- Center for Biophysics and Computational Biology and Department of Chemistry, Temple University, Philadelphia, PA 19122, USA
| | - Nanjie Deng
- Department of Chemistry and Physical Sciences, Pace University, New York, NY 10038, USA
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2
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Delaney AR, Kroeger AA, Coote ML, Colebatch AL. Oxidative Addition and β-Hydride Elimination by a Macrocyclic Dinickel Complex: Observing Bimetallic Elementary Reactions. Chemistry 2023; 29:e202302366. [PMID: 37641804 DOI: 10.1002/chem.202302366] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 08/24/2023] [Accepted: 08/28/2023] [Indexed: 08/31/2023]
Abstract
The dinickel(I) complex Ni2 (tBu PONNOPONNO), featuring a planar macrocyclic diphosphoranide ligand tBu PONNOPONNO, offers a unique architectural platform for observing bimetallic elementary reactions. Oxidative addition reactions of alkyl halides produce dinickel(II) complexes of the type Ni2 (μ-R)(μ-X)(tBu PONNOPONNO). However, when R=Et β-hydride elimination is observed to form a dinickel monohydride, with the rate dependent on the nature of X. DFT studies suggest a new mechanism for bimetallic β-hydride elimination, where the rate dependence arises from the steric pressure imposed by the X group on the opposing trans face of the dinickel macrocycle. This work enhances understanding of bimetallic elementary reactions, particularly β-hydride elimination, which have not been well-explored for dinuclear systems.
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Affiliation(s)
- Andie R Delaney
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Asja A Kroeger
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
- Institute for Nanoscale Science & Technology, Flinders University, Adelaide, South Australia, 5042, Australia
| | - Michelle L Coote
- Institute for Nanoscale Science & Technology, Flinders University, Adelaide, South Australia, 5042, Australia
| | - Annie L Colebatch
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
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3
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Rangaswamy S, Sreenivasulu R, Babu VR, Syed T, Kapavarapu RK, Jayaprakash HV, Abbaraju VDNK. Design, Synthesis, Anticancer Evaluation, and Molecular Docking Studies of Oxazole-Incorporated Naphthyridine Derivatives. Chem Biodivers 2023; 20:e202300466. [PMID: 37864549 DOI: 10.1002/cbdv.202300466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 04/02/2023] [Revised: 10/19/2023] [Accepted: 10/20/2023] [Indexed: 10/23/2023]
Abstract
A novel series of oxazole incorporated naphthyridine (21 a-j) derivatives were designed and, synthesized followed by screening of their anticancer activity profiles against human breast cancer (MCF-7), human lung cancer (A549) and human prostate (PC3 & DU-145) cancer cell lines by employing MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide] assay using etoposide as the positive control. Of these compounds, N-(6-chloro-3-(4-(3,4,5-trimethoxyphenyl)oxazol-2-yl)-1,5-naphthyridin-4-yl)oxazol-2-amine with 3,4,5-trimethoxy substituent on the aryl moiety attached to oxazole ring showed potent anticancer activity against PC3, A549, MCF-7, and DU-145 cell lines with IC50 values of 0.13±0.095 μM; 0.10±0.084 μM; 0.18±0.087 μM and 0.15±0.076 μM respectively. Apart from this, compounds N-(6-chloro-3-(4-(3,5-dimethoxyphenyl)oxazol-2-yl)-1,5-naphthyridin-4-yl)oxazol-2-amine, N-(6-chloro-3-(4-(4-methoxyphenyl)oxazol-2-yl)-1,5-naphthyridin-4-yl)oxazol-2-amine, and N-(6-chloro-3-(4-(3,5-dimethylphenyl)oxazol-2-yl)-1,5-naphthyridin-4-yl)oxazol-2-amine also showed better anticancer activities against four cancer cell lines screened for. These activities were also validated through the molecular docking simulations, which further indicated demonstration of better interaction energy and profile by these compounds.
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Affiliation(s)
- Singamsetty Rangaswamy
- Department of Chemistry, GITAM School of Science, Gandhi Institute of Technology and Management (Deemed to be University), Visakhapatnam, Andhra Pradesh, 530045, India
| | - Reddymasu Sreenivasulu
- Department of Chemistry, University College of Engineering (Autonomous), Jawaharlal Nehru Technological University, Kakinada, Andhra Pradesh, 533003, India
| | - Vankayala Ramesh Babu
- Department of Chemistry, GITAM School of Science, Gandhi Institute of Technology and Management (Deemed to be University), Visakhapatnam, Andhra Pradesh, 530045, India
| | - Tasqeeruddin Syed
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Khalid University, Abha, Saudi Arabia
| | - Ravi Kumar Kapavarapu
- Department of Pharmaceutical Chemistry and Phytochemistry, Nirmala College of Pharmacy, Atmakur, Mangalagiri, Andhra Pradesh, 522503, India
| | - Hulikunte Veeranna Jayaprakash
- Department of Chemistry, Sri Siddartha Institute of Technology, Sri Siddartha Academy of Higher Education (Deemed to be University) Tumkur, Karnataka, 572107, India
| | - Venkata Durga Nagendra Kumar Abbaraju
- Department of Chemistry, GITAM School of Science, Gandhi Institute of Technology and Management (Deemed to be University), Visakhapatnam, Andhra Pradesh, 530045, India
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4
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Davis-Gilbert Z, Krämer A, Dunford JE, Howell S, Senbabaoglu F, Wells CI, Bashore FM, Havener TM, Smith JL, Hossain MA, Oppermann U, Drewry DH, Axtman AD. Discovery of a Potent and Selective Naphthyridine-Based Chemical Probe for Casein Kinase 2. ACS Med Chem Lett 2023; 14:432-441. [PMID: 37077385 PMCID: PMC10108397 DOI: 10.1021/acsmedchemlett.2c00530] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 03/07/2023] [Indexed: 03/15/2023] Open
Abstract
Naphthyridine-based inhibitors were synthesized to yield a potent and cell-active inhibitor of casein kinase 2 (CK2). Compound 2 selectively inhibits CK2α and CK2α' when profiled broadly, thereby making it an exquisitely selective chemical probe for CK2. A negative control that is structurally related but lacks a key hinge-binding nitrogen (7) was designed on the basis of structural studies. Compound 7 does not bind CK2α or CK2α' in cells and demonstrates excellent kinome-wide selectivity. Differential anticancer activity was observed when compound 2 was profiled alongside a structurally distinct CK2 chemical probe: SGC-CK2-1. This naphthyridine-based chemical probe (2) represents one of the best available small molecule tools with which to interrogate biology mediated by CK2.
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Affiliation(s)
- Zachary
W. Davis-Gilbert
- Structural
Genomics Consortium, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Andreas Krämer
- Institute
of Pharmaceutical Chemistry, Goethe University
Frankfurt, Max-von-Laue-Strabe 9, Frankfurt 60438, Germany
- Structural
Genomics Consortium, Buchmann Institute for Life Sciences, Goethe University Frankfurt, Max-von-Laue-Strabe 15, Frankfurt 60438, Germany
- Frankfurt
Cancer Institute, Paul-Ehrlich-Straße
42-44, Frankfurt 60596, Germany
| | - James E. Dunford
- Botnar
Research Centre, Nuffield Department of Orthopaedics, Rheumatology
and Musculoskeletal Sciences, University
of Oxford, Oxford OX3 7LD, United Kingdom
| | - Stefanie Howell
- Structural
Genomics Consortium, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Filiz Senbabaoglu
- Botnar
Research Centre, Nuffield Department of Orthopaedics, Rheumatology
and Musculoskeletal Sciences, University
of Oxford, Oxford OX3 7LD, United Kingdom
| | - Carrow I. Wells
- Structural
Genomics Consortium, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Frances M. Bashore
- Structural
Genomics Consortium, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Tammy M. Havener
- Structural
Genomics Consortium, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Jeffery L. Smith
- Structural
Genomics Consortium, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Mohammad A. Hossain
- Structural
Genomics Consortium, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Udo Oppermann
- Botnar
Research Centre, Nuffield Department of Orthopaedics, Rheumatology
and Musculoskeletal Sciences, University
of Oxford, Oxford OX3 7LD, United Kingdom
- Oxford
Translational
Myeloma Centre, University of Oxford, Oxford OX3 7LD, United Kingdom
| | - David H. Drewry
- Structural
Genomics Consortium, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
- UNC
Lineberger Comprehensive Cancer Center, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Alison D. Axtman
- Structural
Genomics Consortium, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
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5
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Delaney AR, Yu LJ, Doan V, Coote ML, Colebatch AL. Bimetallic Nickel Complexes Supported by a Planar Macrocyclic Diphosphoranide Ligand. Chemistry 2023; 29:e202203940. [PMID: 36545819 DOI: 10.1002/chem.202203940] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 12/20/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
Metal-metal cooperativity is emerging as an important strategy in catalysis. This requires appropriate ligand scaffolds that can support two metals in close proximity. Here we report nickel-promoted formation of a dinucleating planar macrocyclic ligand that can support bimetallic dinickel(II) and dinickel(I) complexes. Reaction outcomes can be tuned by variation of the substituents and reaction conditions to favour dinucleating macrocyclic, mononucleating macrocyclic or conventional pincer architectures.
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Affiliation(s)
- Andie R Delaney
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Li-Juan Yu
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Vincent Doan
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
| | - Michelle L Coote
- Institute for Nanoscale Science & Technology, Flinders University, Adelaide, South Australia, 5042, Australia
| | - Annie L Colebatch
- Research School of Chemistry, Australian National University, Canberra, ACT, 2601, Australia
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6
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Keruckiene R, Vijaikis E, Chen CH, Lin BY, Huang JX, Chu CC, Dzeng YC, Chen C, Lee JH, Chiu TL, Macionis S, Keruckas J, Butkute R, Grazulevicius JV. Power Efficiency Enhancement of Organic Light-Emitting Diodes Due to the Favorable Horizontal Orientation of a Naphthyridine-Based Thermally Activated Delayed Fluorescence Luminophore. ACS Appl Electron Mater 2023; 5:1013-1023. [PMID: 36873261 PMCID: PMC9979784 DOI: 10.1021/acsaelm.2c01529] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
Four emitters based on the naphthyridine acceptor moiety and various donor units exhibiting thermally activated delayed fluorescence (TADF) were designed and synthesized. The emitters exhibited excellent TADF properties with a small ΔE ST and a high photoluminescence quantum yield. A green TADF organic light-emitting diode based on 10-(4-(1,8-naphthyridin-2-yl)phenyl)-10H-phenothiazine exhibited a maximum external quantum efficiency of 16.4% with Commission Internationale de L'éclairage coordinates of (0.368, 0.569) as well as a high current and power efficiency of 58.6 cd/A and 57.1 lm/W, respectively. The supreme power efficiency is a record-high value among the reported values of devices with naphthyridine-based emitters. This results from its high photoluminescence quantum yield, efficient TADF, and horizontal molecular orientation. The molecular orientations of the films of the host and the host doped with the naphthyridine emitter were explored by angle-dependent photoluminescence and grazing-incidence small-angle X-ray scattering (GIWAXS). The orientation order parameters (ΘADPL) were found to be 0.37, 0.45, 0.62, and 0.74 for the naphthyridine dopants with dimethylacridan, carbazole, phenoxazine, and phenothiazine donor moieties, respectively. These results were also proven by GIWAXS measurement. The derivative of naphthyridine and phenothiazine was shown to be more flexible to align with the host and to show the favorable horizontal molecular orientation and crystalline domain size, benefiting the outcoupling efficiency and contributing to the device efficiency.
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Affiliation(s)
- Rasa Keruckiene
- Department
of Polymer Chemistry and Technology, Kaunas
University of Technology, K. Barsausko St. 59, LT-50254Kaunas, Lithuania
| | - Eimantas Vijaikis
- Department
of Polymer Chemistry and Technology, Kaunas
University of Technology, K. Barsausko St. 59, LT-50254Kaunas, Lithuania
| | - Chia-Hsun Chen
- Materials
Science and Engineering and Physics, Graduate Institute of Photonics
and Optoelectronics and Department of Electrical Engineering, National Taiwan University, Taipei10617, Taiwan
| | - Bo-Yen Lin
- Department
of Opto-Electronics Engineering, National
Dong Hwa University, Shoufeng, Hualien974301, Taiwan
| | - Jing-Xiang Huang
- Materials
Science and Engineering and Physics, Graduate Institute of Photonics
and Optoelectronics and Department of Electrical Engineering, National Taiwan University, Taipei10617, Taiwan
| | - Chun-Chieh Chu
- Materials
Science and Engineering and Physics, Graduate Institute of Photonics
and Optoelectronics and Department of Electrical Engineering, National Taiwan University, Taipei10617, Taiwan
| | - Yi-Chung Dzeng
- Research
Center for Applied Sciences, Academia Sinica, Taipei11529, Taiwan
| | - Chi Chen
- Research
Center for Applied Sciences, Academia Sinica, Taipei11529, Taiwan
| | - Jiun-Haw Lee
- Materials
Science and Engineering and Physics, Graduate Institute of Photonics
and Optoelectronics and Department of Electrical Engineering, National Taiwan University, Taipei10617, Taiwan
| | - Tien-Lung Chiu
- Department
of Electrical Engineering, Yuan Ze University, Chung-Li32003, Taiwan
| | - Simas Macionis
- Department
of Polymer Chemistry and Technology, Kaunas
University of Technology, K. Barsausko St. 59, LT-50254Kaunas, Lithuania
| | - Jonas Keruckas
- Department
of Polymer Chemistry and Technology, Kaunas
University of Technology, K. Barsausko St. 59, LT-50254Kaunas, Lithuania
| | - Rita Butkute
- Department
of Polymer Chemistry and Technology, Kaunas
University of Technology, K. Barsausko St. 59, LT-50254Kaunas, Lithuania
| | - Juozas Vidas Grazulevicius
- Department
of Polymer Chemistry and Technology, Kaunas
University of Technology, K. Barsausko St. 59, LT-50254Kaunas, Lithuania
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7
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Abstract
Piperazine and homopiperazine are well-studied heterocycles in drug design that have found gainful application as scaffolds and terminal elements and for enhancing the aqueous solubility of a molecule. The optimization of drug candidates that incorporate these heterocycles in an effort to refine potency, selectivity, and developability properties has stimulated the design and evaluation of a wide range of bioisosteres that can offer advantage. In this review, we summarize the design and application of bioisosteres of piperazine and homopiperazine that have almost exclusively been in the drug design arena. While there are ∼100 approved drugs that incorporate a piperazine ring, only a single marketed agricultural product is built on this heterocycle. As part of the review, we discuss some of the potential reasons underlying the relatively low level of importance of this heterocycle to the design of agrochemicals and highlight the potential opportunities for their use in contemporary research programs.
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Affiliation(s)
- Nicholas A Meanwell
- Small Molecule Drug Discovery, Bristol Myers Squibb Research and Early Development, PO Box 4000, Princeton, New Jersey 08543, United States
| | - Olivier Loiseleur
- Syngenta Crop Protection Research, Schaffhauserstrasse, Stein CH-4332, Switzerland
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8
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de Araújo-Neto JB, da Silva MMC, Oliveira-Tintino CDDM, Begnini IM, Rebelo RA, da Silva LE, Mireski SL, Nasato MC, Krautler MIL, Ribeiro-Filho J, Siyadatpanah A, Wilairatana P, Coutinho HDM, Tintino SR. Enhancement of Antibiotic Activity by 1,8- Naphthyridine Derivatives against Multi-Resistant Bacterial Strains. Molecules 2021; 26:7400. [PMID: 34885981 PMCID: PMC8659213 DOI: 10.3390/molecules26237400] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/02/2021] [Accepted: 12/04/2021] [Indexed: 11/24/2022] Open
Abstract
The search for new antibacterial agents has become urgent due to the exponential growth of bacterial resistance to antibiotics. Nitrogen-containing heterocycles such as 1,8-naphthyridine derivatives have been shown to have excellent antimicrobial properties. Therefore, the purpose of this study was to evaluate the antibacterial and antibiotic-modulating activities of 1,8-naphthyridine derivatives against multi-resistant bacterial strains. The broth microdilution method was used to determine the minimum inhibitory concentration (MIC) of the following compounds: 7-acetamido-1,8-naphthyridin-4(1H)-one and 3-trifluoromethyl-N-(5-chloro-1,8-naphthyridin-2-yl)-benzenesulfonamide. The antibiotic-modulating activity was analyzed using subinhibitory concentrations (MIC/8) of these compounds in combination with norfloxacin, ofloxacin, and lomefloxacin. Multi-resistant strains of Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus were used in both tests. Although the compounds had no direct antibacterial activity (MIC ≥ 1.024 µg/mL), they could decrease the MIC of these fluoroquinolones, indicating synergism was obtained from the association of the compounds. These results suggest the existence of a structure-activity relationship in this group of compounds with regard to the modulation of antibiotic activity. Therefore, we conclude that 1,8-naphthyridine derivatives potentiate the activity of fluoroquinolone antibiotics against multi-resistant bacterial strains, and thereby interesting candidates for the development of drugs against bacterial infections caused by multidrug resistant strains.
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Affiliation(s)
- José B. de Araújo-Neto
- Laboratory of Microbiology and Molecular Biology (LMBM), Regional University of Cariri—URCA, Crato 63105-000, CE, Brazil; (J.B.d.A.-N.); (M.M.C.d.S.); (C.D.d.M.O.-T.); (S.R.T.)
| | - Maria M. C. da Silva
- Laboratory of Microbiology and Molecular Biology (LMBM), Regional University of Cariri—URCA, Crato 63105-000, CE, Brazil; (J.B.d.A.-N.); (M.M.C.d.S.); (C.D.d.M.O.-T.); (S.R.T.)
| | - Cícera D. de M. Oliveira-Tintino
- Laboratory of Microbiology and Molecular Biology (LMBM), Regional University of Cariri—URCA, Crato 63105-000, CE, Brazil; (J.B.d.A.-N.); (M.M.C.d.S.); (C.D.d.M.O.-T.); (S.R.T.)
| | - Iêda M. Begnini
- Department of Chemistry, Regional University of Blumenau—FURB, Itoupava Seca, Blumenau 89012-900, SC, Brazil; (I.M.B.); (R.A.R.); (S.L.M.); (M.C.N.); (M.I.L.K.)
| | - Ricardo A. Rebelo
- Department of Chemistry, Regional University of Blumenau—FURB, Itoupava Seca, Blumenau 89012-900, SC, Brazil; (I.M.B.); (R.A.R.); (S.L.M.); (M.C.N.); (M.I.L.K.)
| | - Luiz E. da Silva
- Postgraduate Program in Sustainable Territorial Development—Coastal Sector, Federal University of Paraná, Curitiba 80060-000, PR, Brazil;
| | - Sandro L. Mireski
- Department of Chemistry, Regional University of Blumenau—FURB, Itoupava Seca, Blumenau 89012-900, SC, Brazil; (I.M.B.); (R.A.R.); (S.L.M.); (M.C.N.); (M.I.L.K.)
| | - Michele C. Nasato
- Department of Chemistry, Regional University of Blumenau—FURB, Itoupava Seca, Blumenau 89012-900, SC, Brazil; (I.M.B.); (R.A.R.); (S.L.M.); (M.C.N.); (M.I.L.K.)
| | - Maria I. L. Krautler
- Department of Chemistry, Regional University of Blumenau—FURB, Itoupava Seca, Blumenau 89012-900, SC, Brazil; (I.M.B.); (R.A.R.); (S.L.M.); (M.C.N.); (M.I.L.K.)
| | - Jaime Ribeiro-Filho
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Rua Waldemar Falcão, 121, Candeal, Salvador 40296-710, BA, Brazil;
| | - Abolghasem Siyadatpanah
- Ferdows School of Paramedical and Health, Birjand University of Medical Sciences, Birjand 9717853577, Iran
- Infectious Diseases Research Center, Birjand University of Medical Sciences, Birjand 9717853577, Iran
| | - Polrat Wilairatana
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand
| | - Henrique D. M. Coutinho
- Laboratory of Microbiology and Molecular Biology (LMBM), Regional University of Cariri—URCA, Crato 63105-000, CE, Brazil; (J.B.d.A.-N.); (M.M.C.d.S.); (C.D.d.M.O.-T.); (S.R.T.)
| | - Saulo R. Tintino
- Laboratory of Microbiology and Molecular Biology (LMBM), Regional University of Cariri—URCA, Crato 63105-000, CE, Brazil; (J.B.d.A.-N.); (M.M.C.d.S.); (C.D.d.M.O.-T.); (S.R.T.)
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9
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Cui J, Dietz M, Härterich M, Fantuzzi F, Lu W, Dewhurst RD, Braunschweig H. Diphosphino-Functionalized 1,8- Naphthyridines: a Multifaceted Ligand Platform for Boranes and Diboranes. Chemistry 2021; 27:15751-15756. [PMID: 34545966 PMCID: PMC9292315 DOI: 10.1002/chem.202102721] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Indexed: 12/25/2022]
Abstract
A 1,8‐naphthyridine diphosphine (NDP) reacts with boron‐containing Lewis acids to generate complexes featuring a number of different naphthyridine bonding modes. When exposed to diborane B2Br4, NDP underwent self‐deprotonation to afford [NDP‐B2Br3]Br, an unsymmetrical diborane comprised of four fused rings. The reaction of two equivalents of monoborane BBr3 and NDP in a non‐polar solvent provided the simple phosphine‐borane adduct [NDP(BBr3)2], which then underwent intramolecular halide abstraction to furnish the salt [NDP‐BBr2][BBr4], featuring a different coordination mode from that of [NDP‐B2Br3]Br. Direct deprotonation of NDP by KHMDS or PhCH2K generates mono‐ and dipotassium reagents, respectively. The monopotassium reagent reacts with one or half an equivalent of B2(NMe2)2Cl2 to afford NDP‐based diboranes with three or four amino substituents.
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Affiliation(s)
- Jingjing Cui
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, P. R. China.,Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Maximilian Dietz
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Marcel Härterich
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Felipe Fantuzzi
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Physical and Theoretical Chemistry, Julius-Maximilians-Universität Würzburg, Emil-Fischer-Str. 42, 97074, Würzburg, Germany
| | - Wei Lu
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Rian D Dewhurst
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Holger Braunschweig
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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10
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Akatsuka K, Abe R, Takase T, Oyama D. Coordination Chemistry of Ru(II) Complexes of an Asymmetric Bipyridine Analogue: Synergistic Effects of Supporting Ligand and Coordination Geometry on Reactivities. Molecules 2019; 25:E27. [PMID: 31861731 DOI: 10.3390/molecules25010027] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 12/17/2019] [Accepted: 12/17/2019] [Indexed: 01/09/2023] Open
Abstract
The reactivities of transition metal coordination compounds are often controlled by the environment around the coordination sphere. For ruthenium(II) complexes, differences in polypyridyl supporting ligands affect some types of reactivity despite identical coordination geometries. To evaluate the synergistic effects of (i) the supporting ligands, and (ii) the coordination geometry, a series of dicarbonyl-ruthenium(II) complexes that contain both asymmetric and symmetric bidentate polypyridyl ligands were synthesized. Molecular structures of the complexes were determined by X-ray crystallography to distinguish their steric configuration. Structural, computational, and electrochemical analysis revealed some differences between the isomers. Photo- and thermal reactions indicated that the reactivities of the complexes were significantly affected by both their structures and the ligands involved.
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11
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Melzer BC, Plodek A, Bracher F. Functionalization of 4-bromobenzo[c][2,7]naphthyridine via regioselective direct ring metalation. A novel approach to analogues of pyridoacridine alkaloids. Beilstein J Org Chem 2019; 15:2304-2310. [PMID: 31598182 PMCID: PMC6774065 DOI: 10.3762/bjoc.15.222] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Accepted: 09/18/2019] [Indexed: 12/25/2022] Open
Abstract
Readily available 4-bromobenzo[c][2,7]naphthyridine undergoes regioselective direct ring metalation at C-5 with TMPMgCl∙LiCl at −40 °C. Quenching with various electrophiles gives a broad range of 5-substituted products, which are building blocks for the synthesis of heterocyclic natural products and analogues thereof. In combination with a Parham-type cyclization a novel approach to pyrido[4,3,2-mn]acridones has been worked out.
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Affiliation(s)
- Benedikt C Melzer
- Department of Pharmacy - Center for Drug Research, Ludwig-Maximilians University Munich, Butenandtstr. 5-13, 81377 Munich, Germany
| | - Alois Plodek
- Department of Pharmacy - Center for Drug Research, Ludwig-Maximilians University Munich, Butenandtstr. 5-13, 81377 Munich, Germany
| | - Franz Bracher
- Department of Pharmacy - Center for Drug Research, Ludwig-Maximilians University Munich, Butenandtstr. 5-13, 81377 Munich, Germany
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12
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Mahalakshmi G, Vennila KN, Selvakumar B, Rao PL, Malwade R, Deval S, Madhuri S, Seenivasaperumal M, Elango KP. Spectroscopic investigations on DNA binding profile of two new naphthyridine carboxamides and their application as turn-on fluorescent DNA staining probes. J Biomol Struct Dyn 2019; 38:3443-3451. [PMID: 31422749 DOI: 10.1080/07391102.2019.1657501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 10/26/2022]
Abstract
Two new 10-methoxydibenzo[b,h][1,6]naphthyridine-2-carboxamide derivatives (R1 and R2) have been synthesized and characterized using different spectral techniques. The binding of these probes with DNA was investigated using spectral (Electronic, fluorescence, 1H NMR and circular dichroism) and molecular docking studies. These probes exhibited a strong fluorescence around 440 nm upon excitation around 380 nm. Electronic and competitive fluorescence titration studies, in HEPES [(4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid)] buffer/dimethyl sulfoxide (pH 7.4) medium, suggest that these probes bind strongly to DNA, which is substantiated by 1H NMR study. The binding constants are calculated to be 5.3 × 107 and 6.8 × 106 M-1 for R1 and R2, respectively. From the results of spectral studies, it is proposed that the mechanism of binding of these probes with DNA is through minor groove binding mode, which is further confirmed by circular dichroism and molecular docking studies. Initial cell viability screening using MTT (3-[4,5-methylthiazol-2-yl]-2,5-diphenyl-tetrazolium bromide) assay shows that normal Vero cells are viable towards these probes at nano molar concentration, which is the concentration range employed in the present study for DNA staining (IC50 in the order of 0.023 mM). The enhancement in fluorescence intensity of these probes upon binding with DNA enables the staining of DNA in agarose gel in gel electrophoresis experiment. The sensitivity of these probes is comparable with that of ethidium bromide and DNA amounts as low as 4 nano gram are detectable.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- G Mahalakshmi
- Department of Chemistry, Gandhigram Rural Institute (Deemed to be University), Gandhigram, India
| | - K N Vennila
- Department of Chemistry, Gandhigram Rural Institute (Deemed to be University), Gandhigram, India
| | | | - P Lakshmana Rao
- National Institute of Animal Biotechnology, Hyderabad, India
| | - Ruchi Malwade
- National Institute of Animal Biotechnology, Hyderabad, India
| | - Sunny Deval
- National Institute of Animal Biotechnology, Hyderabad, India
| | - S Madhuri
- National Institute of Animal Biotechnology, Hyderabad, India
| | - M Seenivasaperumal
- Department of Chemistry, Gandhigram Rural Institute (Deemed to be University), Gandhigram, India
| | - Kuppanagounder P Elango
- Department of Chemistry, Gandhigram Rural Institute (Deemed to be University), Gandhigram, India
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13
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Balkenhohl M, Greiner R, Makarov IS, Heinz B, Karaghiosoff K, Zipse H, Knochel P. Zn-, Mg-, and Li-TMP Bases for the Successive Regioselective Metalations of the 1,5- Naphthyridine Scaffold (TMP=2,2,6,6-Tetramethylpiperidyl). Chemistry 2017; 23:13046-13050. [PMID: 28777497 DOI: 10.1002/chem.201703638] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Indexed: 12/26/2022]
Abstract
A set of successive regioselective metalations and functionalizations of the 1,5-naphthyridine scaffold are described. A combination of Zn-, Mg-, and Li-TMP (TMP=2,2,6,6-tetramethylpiperidyl) bases and the presence or absence of a Lewis acid (BF3 ⋅OEt2 ) allows the introduction of up to three substituents to the 1,5-naphthyridine core. Also, a novel "halogen dance" reaction was discovered upon metalation of an 8-iodo-2,4-trifunctionalized 1,5-naphthyridine allowing a fourth regioselective functionalization. Additionally, reactions leading to key 1,5-naphthyridines for the preparation of OLED materials and a potential antibacterial agent were performed.
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Affiliation(s)
- Moritz Balkenhohl
- Ludwig-Maximilians-Universität München, Department Chemie, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - Robert Greiner
- Ludwig-Maximilians-Universität München, Department Chemie, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - Ilya S Makarov
- Ludwig-Maximilians-Universität München, Department Chemie, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - Benjamin Heinz
- Ludwig-Maximilians-Universität München, Department Chemie, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - Konstantin Karaghiosoff
- Ludwig-Maximilians-Universität München, Department Chemie, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - Hendrik Zipse
- Ludwig-Maximilians-Universität München, Department Chemie, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
| | - Paul Knochel
- Ludwig-Maximilians-Universität München, Department Chemie, Butenandtstrasse 5-13, Haus F, 81377, München, Germany
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14
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Ndubaku CO, Crawford TD, Chen H, Boggs JW, Drobnick J, Harris SF, Jesudason R, McNamara E, Nonomiya J, Sambrone A, Schmidt S, Smyczek T, Vitorino P, Wang L, Wu P, Yeung S, Chen J, Chen K, Ding CZ, Wang T, Xu Z, Gould SE, Murray LJ, Ye W. Structure-Based Design of GNE-495, a Potent and Selective MAP4K4 Inhibitor with Efficacy in Retinal Angiogenesis. ACS Med Chem Lett 2015; 6:913-8. [PMID: 26288693 DOI: 10.1021/acsmedchemlett.5b00174] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Accepted: 06/29/2015] [Indexed: 12/11/2022] Open
Abstract
Diverse biological roles for mitogen-activated protein kinase kinase kinase kinase 4 (MAP4K4) have necessitated the identification of potent inhibitors in order to study its function in various disease contexts. In particular, compounds that can be used to carry out such studies in vivo would be critical for elucidating the potential for therapeutic intervention. A structure-based design effort coupled with property-guided optimization directed at minimizing the ability of the inhibitors to cross into the CNS led to an advanced compound 13 (GNE-495) that showed excellent potency and good PK and was used to demonstrate in vivo efficacy in a retinal angiogenesis model recapitulating effects that were observed in the inducible Map4k4 knockout mice.
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Affiliation(s)
- Chudi O. Ndubaku
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Terry D. Crawford
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Huifen Chen
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Jason W. Boggs
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Joy Drobnick
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Seth F. Harris
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Rajiv Jesudason
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Erin McNamara
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Jim Nonomiya
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Amy Sambrone
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Stephen Schmidt
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Tanya Smyczek
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Philip Vitorino
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Lan Wang
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Ping Wu
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Stacey Yeung
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Jinhua Chen
- Wuxi Apptec Co., Ltd., 288
Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, People’s Republic of China
| | - Kevin Chen
- Wuxi Apptec Co., Ltd., 288
Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, People’s Republic of China
| | - Charles Z. Ding
- Wuxi Apptec Co., Ltd., 288
Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, People’s Republic of China
| | - Tao Wang
- Wuxi Apptec Co., Ltd., 288
Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, People’s Republic of China
| | - Zijin Xu
- Wuxi Apptec Co., Ltd., 288
Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, People’s Republic of China
| | - Stephen E. Gould
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Lesley J. Murray
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Weilan Ye
- Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
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