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Nguyen VT, Pham MQ, Vu TH, Tran THH, Doan DT, Nguyen DL, Le P, Luu VC. Synthesis of pyrophosphate analogues and their cytotoxic activities. JOURNAL OF CHEMICAL RESEARCH 2021. [DOI: 10.1177/17475198211043439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Six pyrophosphate analogues are prepared from zerumbone, murrayafoline A, acridone, and 4-hydroxycoumarin via 1,3-dipolar cycloaddition reactions. Their in vitro cytotoxic activity is evaluated against HepG2, LU-1, and HeLa cancer cell lines. Among them, diisopropyl ((ethoxy((4-((1-methoxy-3-methyl-9 H-carbazol-9-yl)methyl)-1 H-1,2,3-triazol-1-yl)methyl)phosphoryl)methyl)phosphonate (6a) and diisopropyl ((ethoxy((4-(((3-methyl-9 H-carbazol-1-yl)oxy)methyl)-1 H-1,2,3-triazol-1-yl)methyl)phosphoryl)methyl)phosphonate (6b) are found to show activity against HepG2, LU-1, and HeLa cancer cell lines, with IC50 values ranging from 7.31 to 17.88 μM.
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Affiliation(s)
- Van-Tai Nguyen
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
- Institute of Chemistry, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Minh-Quan Pham
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
- Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Thi-Ha Vu
- Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Thi-Hong-Ha Tran
- Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Duy-Tien Doan
- Institute of Chemistry, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Dinh-Luyen Nguyen
- Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Phong Le
- Institute of Forensic Sciences, Hanoi, Vietnam
| | - Van-Chinh Luu
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
- Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology, Hanoi, Vietnam
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Laghezza A, Piemontese L, Brunetti L, Caradonna A, Agamennone M, Loiodice F, Tortorella P. (2-Aminobenzothiazole)-Methyl-1,1-Bisphosphonic Acids: Targeting Matrix Metalloproteinase 13 Inhibition to the Bone. Pharmaceuticals (Basel) 2021; 14:ph14020085. [PMID: 33498946 PMCID: PMC7912614 DOI: 10.3390/ph14020085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/13/2021] [Accepted: 01/20/2021] [Indexed: 12/23/2022] Open
Abstract
Matrix Metalloproteinases (MMPs) are a family of secreted and membrane-bound enzymes, of which 24 isoforms are known in humans. These enzymes degrade the proteins of the extracellular matrix and play a role of utmost importance in the physiological remodeling of all tissues. However, certain MMPs, such as MMP-2, -9, and -13, can be overexpressed in pathological states, including cancer and metastasis. Consequently, the development of MMP inhibitors (MMPIs) has been explored for a long time as a strategy to prevent and hinder metastatic growth, but the important side effects linked to promiscuous inhibition of MMPs prevented the clinical use of MMPIs. Therefore, several strategies were proposed to improve the therapeutic profile of this pharmaceutical class, including improved selectivity toward specific MMP isoforms and targeting of specific organs and tissues. Combining both approaches, we conducted the synthesis and preliminary biological evaluation of a series of (2-aminobenzothiazole)-methyl-1,1-bisphosphonic acids active as selective inhibitors of MMP-13 via in vitro and in silico studies, which could prove useful for the treatment of bone metastases thanks to the bone-targeting capabilities granted by the bisphosphonic acid group.
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Affiliation(s)
- Antonio Laghezza
- Department of Pharmacy and Pharmaceutical Sciences, University of Bari “A. Moro”, via E. Orabona 4, 70125 Bari, Italy; (A.L.); (L.P.); (L.B.); (A.C.)
| | - Luca Piemontese
- Department of Pharmacy and Pharmaceutical Sciences, University of Bari “A. Moro”, via E. Orabona 4, 70125 Bari, Italy; (A.L.); (L.P.); (L.B.); (A.C.)
| | - Leonardo Brunetti
- Department of Pharmacy and Pharmaceutical Sciences, University of Bari “A. Moro”, via E. Orabona 4, 70125 Bari, Italy; (A.L.); (L.P.); (L.B.); (A.C.)
| | - Alessia Caradonna
- Department of Pharmacy and Pharmaceutical Sciences, University of Bari “A. Moro”, via E. Orabona 4, 70125 Bari, Italy; (A.L.); (L.P.); (L.B.); (A.C.)
| | - Mariangela Agamennone
- Department of Pharmacy, University “G. d’Annunzio” of Chieti-Pescara, Via Dei Vestini, 31, 66100 Chieti, Italy;
| | - Fulvio Loiodice
- Department of Pharmacy and Pharmaceutical Sciences, University of Bari “A. Moro”, via E. Orabona 4, 70125 Bari, Italy; (A.L.); (L.P.); (L.B.); (A.C.)
- Correspondence: (F.L.); (P.T.)
| | - Paolo Tortorella
- Department of Pharmacy and Pharmaceutical Sciences, University of Bari “A. Moro”, via E. Orabona 4, 70125 Bari, Italy; (A.L.); (L.P.); (L.B.); (A.C.)
- Correspondence: (F.L.); (P.T.)
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Stravinskiene D, Sliziene A, Baranauskiene L, Petrikaite V, Zvirbliene A. Inhibitory Monoclonal Antibodies and Their Recombinant Derivatives Targeting Surface-Exposed Carbonic Anhydrase XII on Cancer Cells. Int J Mol Sci 2020; 21:ijms21249411. [PMID: 33321910 PMCID: PMC7763246 DOI: 10.3390/ijms21249411] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 12/08/2020] [Indexed: 01/17/2023] Open
Abstract
Monoclonal and recombinant antibodies are widely used for the diagnostics and therapy of cancer. They are generated to interact with cell surface proteins which are usually involved in the development and progression of cancer. Carbonic anhydrase XII (CA XII) contributes to the survival of tumors under hypoxic conditions thus is considered a candidate target for antibody-based therapy. In this study, we have generated a novel collection of monoclonal antibodies (MAbs) against the recombinant extracellular domain of CA XII produced in HEK-293 cells. Eighteen out of 24 MAbs were reactive with cellular CA XII on the surface of live kidney and lung cancer cells as determined by flow cytometry. One MAb 14D6 also inhibited the enzymatic activity of recombinant CA XII as measured by the stopped-flow assay. MAb 14D6 showed the migrastatic effect on human lung carcinoma A549 and renal carcinoma A498 cell lines in a ‘wound healing’ assay. It did not reduce the growth of multicellular lung and renal cancer spheroids but reduced the cell viability by the ATP Bioluminescence assay. Epitope mapping revealed the surface-exposed amino acid sequence (35-FGPDGENS-42) close to the catalytic center of CA XII recognized by the MAb 14D6. The variable regions of the heavy and light chains of MAb 14D6 were sequenced and their complementarity-determining regions were defined. The obtained variable sequences were used to generate recombinant antibodies in two formats: single-chain fragment variable (scFv) expressed in E. coli and scFv fused to human IgG1 Fc fragment (scFv-Fc) expressed in Chinese Hamster Ovary (CHO) cells. Both recombinant antibodies maintained the same specificity for CA XII as the parental MAb 14D6. The novel antibodies may represent promising tools for CA XII-related cancer research and immunotherapy.
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Affiliation(s)
- Dovile Stravinskiene
- Department of Immunology and Cell Biology, Institute of Biotechnology, Life Sciences Center, Vilnius University, Sauletekio al. 7, LT-10257 Vilnius, Lithuania; (A.S.); (A.Z.)
- Correspondence:
| | - Aiste Sliziene
- Department of Immunology and Cell Biology, Institute of Biotechnology, Life Sciences Center, Vilnius University, Sauletekio al. 7, LT-10257 Vilnius, Lithuania; (A.S.); (A.Z.)
| | - Lina Baranauskiene
- Department of Biothermodynamics and Drug Design, Institute of Biotechnology, Life Sciences Center, Vilnius University, Sauletekio al. 7, LT-10257 Vilnius, Lithuania; (L.B.); (V.P.)
| | - Vilma Petrikaite
- Department of Biothermodynamics and Drug Design, Institute of Biotechnology, Life Sciences Center, Vilnius University, Sauletekio al. 7, LT-10257 Vilnius, Lithuania; (L.B.); (V.P.)
- Laboratory of Drug Targets Histopathology, Institute of Cardiology, Lithuanian University of Health Sciences, Sukileliu pr. 13, LT-50162 Kaunas, Lithuania
| | - Aurelija Zvirbliene
- Department of Immunology and Cell Biology, Institute of Biotechnology, Life Sciences Center, Vilnius University, Sauletekio al. 7, LT-10257 Vilnius, Lithuania; (A.S.); (A.Z.)
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Bone-Seeking Matrix Metalloproteinase Inhibitors for the Treatment of Skeletal Malignancy. Pharmaceuticals (Basel) 2020; 13:ph13060113. [PMID: 32492898 PMCID: PMC7344628 DOI: 10.3390/ph13060113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 05/29/2020] [Accepted: 05/30/2020] [Indexed: 12/21/2022] Open
Abstract
Matrix metalloproteinases (MMPs) are a family of enzymes involved at different stages of cancer progression and metastasis. We previously identified a novel class of bisphosphonic inhibitors, selective for MMPs crucial for bone remodeling, such as MMP-2. Due to the increasing relevance of specific MMPs at various stages of tumor malignancy, we focused on improving potency towards certain isoforms. Here, we tackled MMP-9 because of its confirmed role in tumor invasion, metastasis, angiogenesis, and immuno-response, making it an ideal target for cancer therapy. Using a computational analysis, we designed and characterized potent MMP-2/MMP-9 inhibitors. This is a promising approach to develop and clinically translate inhibitors that could be used in combination with standard care therapy for the treatment of skeletal malignancies.
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Liang XZ, Li R, Xu B, Luo D, Liu GB, Peng J, Li G. Systematic evaluation of the mechanisms of zoledronic acid based on network pharmacology. Comput Biol Chem 2019; 83:107097. [PMID: 31446368 DOI: 10.1016/j.compbiolchem.2019.107097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Revised: 07/30/2019] [Accepted: 07/31/2019] [Indexed: 12/31/2022]
Abstract
Zoledronic acid (ZA) is an FDA-approved drug and a third-generation bisphosphonate (BPs). A systematic evaluation of the mechanisms of ZA has not previously been performed. In this study, validated targets of ZA were screened using PubChem, Herbal Ingredients' Targets Database (HIT), Binding Database (BindingDB), and ChemBank, and potential targets of ZA were identified based on structural characteristics of ligands and proteins. The candidate targets were then assessed using GeneMANIA, Gene Ontology (GO), and pathway analysis, and molecule-target-GO-pathway networks were visualized using Cytoscape. Nine validated targets and 26 potential targets were obtained. The networks generated via this analysis showed that the candidate targets were associated with cell proliferation and metabolism as well as other biological processes (BP) and pathways. In general, ZA appeared to play crucial roles in multiple functions, including metabolism, regulation of vascular smooth muscle cell proliferation, and chemical carcinogenesis; a great deal of additional research must be performed. Moreover, the current study showed that it is feasible to analyze the mechanisms of ZA via target prediction, which facilitates systematic pharmacological evaluation.
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Affiliation(s)
- Xue-Zhen Liang
- The First Clinical Medical School, Shandong University of Traditional Chinese Medicine, Shandong, 250355, China; Institute of Orthopedics, The General Hospital of PLA, Beijing, 100850, China
| | - Rui Li
- Institute of Orthopedics, The General Hospital of PLA, Beijing, 100850, China
| | - Bo Xu
- The First Clinical Medical School, Shandong University of Traditional Chinese Medicine, Shandong, 250355, China
| | - Di Luo
- The First Clinical Medical School, Shandong University of Traditional Chinese Medicine, Shandong, 250355, China
| | - Guang-Bo Liu
- Institute of Orthopedics, The General Hospital of PLA, Beijing, 100850, China
| | - Jiang Peng
- Institute of Orthopedics, The General Hospital of PLA, Beijing, 100850, China.
| | - Gang Li
- The First Clinical Medical School, Shandong University of Traditional Chinese Medicine, Shandong, 250355, China; Orthopaedic Microsurgery, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Shandong, 250014, China.
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Heron PW, Abellán-Flos M, Salmon L, Sygusch J. Bisphosphonate Inhibitors of Mammalian Glycolytic Aldolase. J Med Chem 2018; 61:10558-10572. [PMID: 30418024 DOI: 10.1021/acs.jmedchem.8b01000] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The glycolytic enzyme aldolase is an emerging drug target in diseases such as cancer and protozoan infections which are dependent on a hyperglycolytic phenotype to synthesize adenosine 5'-triphosphate and metabolic precursors for biomass production. To date, structural information for the enzyme in complex with phosphate-derived inhibitors has been lacking. Thus, we determined the crystal structure of mammalian aldolase in complex with naphthalene 2,6-bisphosphate (1) that served as a template for the design of bisphosphonate-based inhibitors, namely, 2-phosphate-naphthalene 6-bisphosphonate (2), 2-naphthol 6-bisphosphonate (3), and 1-phosphate-benzene 4-bisphosphonate (4). All inhibitors targeted the active site, and the most promising lead, 2, exhibited slow-binding inhibition with an overall inhibition constant of ∼38 nM. Compound 2 inhibited proliferation of HeLa cancer cells, whereas HEK293 cells expressing a normal phenotype were not inhibited. The crystal structures delineated the essential features of high-affinity phosphate-derived inhibitors and provide a template for the development of inhibitors with prophylaxis potential.
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Affiliation(s)
- Paul W Heron
- Département de Biochimie et Médecine Moléculaire , Université de Montréal , CP 6128, Succursale Centre-Ville, Montréal , Québec H3C 3J7 , Canada
| | - Marta Abellán-Flos
- Equipe de Chimie Bioorganique et Bioinorganique, Institut de Chimie Moléculaire et des Matériaux D'Orsay (ICMMO) , Univ Paris-Saclay, Univ Paris-Sud, CNRS UMR8182, LabEx LERMIT , rue du doyen Georges Poitou , F-91405 Orsay , France
| | - Laurent Salmon
- Equipe de Chimie Bioorganique et Bioinorganique, Institut de Chimie Moléculaire et des Matériaux D'Orsay (ICMMO) , Univ Paris-Saclay, Univ Paris-Sud, CNRS UMR8182, LabEx LERMIT , rue du doyen Georges Poitou , F-91405 Orsay , France
| | - Jurgen Sygusch
- Département de Biochimie et Médecine Moléculaire , Université de Montréal , CP 6128, Succursale Centre-Ville, Montréal , Québec H3C 3J7 , Canada
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Shay G, Tauro M, Loiodice F, Tortorella P, Sullivan DM, Hazlehurst LA, Lynch CC. Selective inhibition of matrix metalloproteinase-2 in the multiple myeloma-bone microenvironment. Oncotarget 2018; 8:41827-41840. [PMID: 28611279 PMCID: PMC5522031 DOI: 10.18632/oncotarget.18103] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 04/27/2017] [Indexed: 01/03/2023] Open
Abstract
Multiple myeloma is a plasma cell malignancy that homes aberrantly to bone causing extensive skeletal destruction. Despite the development of novel therapeutic agents that have significantly improved overall survival, multiple myeloma remains an incurable disease. Matrix metalloproteinase-2 (MMP-2) is associated with cancer and is significantly overexpressed in the bone marrow of myeloma patients. These data provide rationale for selectively inhibiting MMP-2 activity as a multiple myeloma treatment strategy. Given that MMP-2 is systemically expressed, we used novel “bone-seeking” bisphosphonate based MMP-2 specific inhibitors (BMMPIs) to target the skeletal tissue thereby circumventing potential off-target effects of MMP-2 inhibition outside the bone marrow-tumor microenvironment. Using in vivo models of multiple myeloma (5TGM1, U266), we examined the impact of MMP-2 inhibition on disease progression using BMMPIs. Our data demonstrate that BMMPIs can decrease multiple myeloma burden and protect against cancer-induced osteolysis. Additionally, we have shown that MMP-2 can be specifically inhibited in the multiple myeloma-bone microenvironment, underscoring the feasibility of developing targeted and tissue selective MMP inhibitors. Given the well-tolerated nature of bisphosphonates in humans, we anticipate that BMMPIs could be rapidly translated to the clinical setting for the treatment of multiple myeloma.
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Affiliation(s)
- Gemma Shay
- Tumor Biology Department, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Marilena Tauro
- Tumor Biology Department, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Fulvio Loiodice
- Department of Pharmacy and Pharmaceutical Sciences, Università degli Studi di Bari "A. Moro", Bari, Italy
| | - Paolo Tortorella
- Department of Pharmacy and Pharmaceutical Sciences, Università degli Studi di Bari "A. Moro", Bari, Italy
| | - Daniel M Sullivan
- Blood and Marrow Transplantation and Cellular Immunology Department, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Lori A Hazlehurst
- Hematopoietic Malignancy and Transplantation Program, West Virginia University, Morgantown, WV, USA
| | - Conor C Lynch
- Tumor Biology Department, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
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Gałęzowska J, Czapor-Irzabek H, Chmielewska E, Kafarski P, Janek T. Aminobisphosphonates based on cyclohexane backbone as coordinating agents for metal ions. Thermodynamic, spectroscopic and biological studies. NEW J CHEM 2018. [DOI: 10.1039/c8nj01158c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Complex formation equilibria of calcium, magnesium, copper and nickel with amino-bisphosphonic ligands are described, together with a speciation study along with calorimetric outcome and cytotoxicity characteristics.
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Affiliation(s)
- J. Gałęzowska
- Department of Inorganic Chemistry
- Wrocław Medical University
- Wrocław 50-556
- Poland
| | - H. Czapor-Irzabek
- Laboratory of Elemental Analysts and Structural Research
- Wrocław Medical University
- Wrocław 50-556
- Poland
| | - E. Chmielewska
- Department of Bioorganic Chemistry
- Faculty of Chemistry
- Wrocław University of Science and Technology
- Wrocław
- Poland
| | - P. Kafarski
- Department of Bioorganic Chemistry
- Faculty of Chemistry
- Wrocław University of Science and Technology
- Wrocław
- Poland
| | - T. Janek
- Department of Inorganic Chemistry
- Wrocław Medical University
- Wrocław 50-556
- Poland
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Luisi G, Angelini G, Gasbarri C, Laghezza A, Agamennone M, Loiodice F, Supuran CT, Campestre C, Tortorella P. Dual targeting of cancer-related human matrix metalloproteinases and carbonic anhydrases by chiral N-(biarylsulfonyl)-phosphonic acids. J Enzyme Inhib Med Chem 2017; 32:1260-1264. [PMID: 28948845 PMCID: PMC6009896 DOI: 10.1080/14756366.2017.1378192] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
A series of nanomolar phosphonate matrix metalloproteinase (MPP) inhibitors was tested for inhibitory activity against a panel of selected human carbonic anhydrase (CA, EC 4.2.1.1) isozymes, covering the cancer-associated CA IX and XII. None of the reported sulfonyl and sulfonylamino-derivatives sensitively affected the catalytic activity of the cytosolic isoforms CA I and II, which are considered off-target isoforms in view of their physiological role. The most active inhibitors were in the series of chiral N-(sulfonyl)phosphovaline derivatives, which showed good to excellent inhibitory activity over target CAs, with compound 15 presenting the best isoform-selectivity toward CA IX. We suggest here that the phosphonates have the potential as dual inhibitors of MMPs and CAs, both involved in tumor formation, invasion and metastasis.
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Affiliation(s)
- Grazia Luisi
- a Department of Pharmacy , "G. d'Annunzio" University of Chieti-Pescara , Chieti , Italy
| | - Guido Angelini
- a Department of Pharmacy , "G. d'Annunzio" University of Chieti-Pescara , Chieti , Italy
| | - Carla Gasbarri
- a Department of Pharmacy , "G. d'Annunzio" University of Chieti-Pescara , Chieti , Italy
| | - Antonio Laghezza
- b Department of Pharmacy and Pharmaceutical Sciences , "A. Moro" University of Bari , Bari , Italy
| | - Mariangela Agamennone
- a Department of Pharmacy , "G. d'Annunzio" University of Chieti-Pescara , Chieti , Italy
| | - Fulvio Loiodice
- b Department of Pharmacy and Pharmaceutical Sciences , "A. Moro" University of Bari , Bari , Italy
| | - Claudiu T Supuran
- c Neurofarba Department, Section of Pharmaceutical and Nutriceutical Sciences , University of Florence , Sesto Fiorentino (Florence) , Italy
| | - Cristina Campestre
- a Department of Pharmacy , "G. d'Annunzio" University of Chieti-Pescara , Chieti , Italy
| | - Paolo Tortorella
- b Department of Pharmacy and Pharmaceutical Sciences , "A. Moro" University of Bari , Bari , Italy
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Abstract
INTRODUCTION The enzyme carbonic anhydrase (CA, EC 4.2.1.1) is found in numerous organisms across the tree of life, with seven distinct classes known to date. CA inhibition can be exploited for the treatment of edema, glaucoma, seizures, obesity, cancer and infectious diseases. A myriad of CA inhibitor (CAI) classes and inhibition mechanisms have been identified over the past decade, mainly through structure-based drug design approaches. Five different CA inhibition mechanisms are presently known. Areas covered: Recent advances in structure-based CAI design are reviewed, with periodic table-based organization of inhibitor classes. Expert opinion: Various structure-based drug design studies have led to deep understanding of factors governing tight binding and selectivity for the various isoforms. Carboxylic acids, phenols, polyamines, diols, borols, boronic acids, coumarins and sulfonamides represent successful stories which led to an anti-tumor sulfonamide in Phase I clinical trials (SLC-0111). For many inhibitor classes, no detailed crystallographic data are available. Detailed structural characterization of all CAI classes may lead to further advances in the field with potential therapeutic implications in the management of indications including neuropathic pain, cerebral ischemia, arthritis and tumor imaging.
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Affiliation(s)
- Claudiu T Supuran
- a Neurofarba Department, Sezione di Scienze Farmaceutiche e Nutraceutiche , Università degli Studi di Firenze , Sesto Fiorentino (Florence) , Italy
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Abstract
Six genetic families of the enzyme carbonic anhydrase (CA, EC 4.2.1.1) were described to date. Inhibition of CAs has pharmacologic applications in the field of antiglaucoma, anticonvulsant, anticancer, and anti-infective agents. New classes of CA inhibitors (CAIs) were described in the last decade with enzyme inhibition mechanisms differing considerably from the classical inhibitors of the sulfonamide or anion type. Five different CA inhibition mechanisms are known: (i) the zinc binders coordinate to the catalytically crucial Zn(II) ion from the enzyme active site, with the metal in tetrahedral or trigonal bipyramidal geometries. Sulfonamides and their isosters, most anions, dithiocarbamates and their isosters, carboxylates, and hydroxamates bind in this way; (ii) inhibitors that anchor to the zinc-coordinated water molecule/hydroxide ion (phenols, carboxylates, polyamines, 2-thioxocoumarins, sulfocoumarins); (iii) inhibitors which occlude the entrance to the active site cavity (coumarins and their isosters), this binding site coinciding with that where CA activators bind; (iv) compounds which bind out of the active site cavity (a carboxylic acid derivative was seen to inhibit CA in this manner), and (v) compounds for which the inhibition mechanism is not known, among which the secondary/tertiary sulfonamides as well as imatinib/nilotinib are the most investigated examples. As CAIs are used clinically in many pathologies, with a sulfonamide inhibitor (SLC-0111) in Phase I clinical trials for the management of metastatic solid tumors, this review updates the recent findings in the field which may be useful for a structure-based drug design approach of more selective/potent modulators of the activity of these enzymes.
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Affiliation(s)
- Claudiu T Supuran
- a Neurofarba Department, Laboratorio Di Chimica Bioinorganica, Sezione Di Chimica Farmaceutica E Nutraceutica, Università Degli Studi Di Firenze , Florence , Italy
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