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Berzina MY, Eletskaya BZ, Kayushin AL, Dorofeeva EV, Lutonina OI, Fateev IV, Zhavoronkova ON, Bashorin AR, Arnautova AO, Smirnova OS, Antonov KV, Paramonov AS, Dubinnyi MA, Esipov RS, Miroshnikov AI, Konstantinova ID. Intramolecular Hydrogen Bonding in N 6-Substituted 2-Chloroadenosines: Evidence from NMR Spectroscopy. Int J Mol Sci 2023; 24:ijms24119697. [PMID: 37298648 DOI: 10.3390/ijms24119697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 05/30/2023] [Accepted: 05/31/2023] [Indexed: 06/12/2023] Open
Abstract
Two forms were found in the NMR spectra of N6-substituted 2-chloroadenosines. The proportion of the mini-form was 11-32% of the main form. It was characterized by a separate set of signals in COSY, 15N-HMBC and other NMR spectra. We assumed that the mini-form arises due to the formation of an intramolecular hydrogen bond between the N7 atom of purine and the N6-CH proton of the substituent. The 1H,15N-HMBC spectrum confirmed the presence of a hydrogen bond in the mini-form of the nucleoside and its absence in the main form. Compounds incapable of forming such a hydrogen bond were synthesized. In these compounds, either the N7 atom of the purine or the N6-CH proton of the substituent was absent. The mini-form was not found in the NMR spectra of these nucleosides, confirming the importance of the intramolecular hydrogen bond in its formation.
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Affiliation(s)
- Maria Ya Berzina
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Barbara Z Eletskaya
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Alexei L Kayushin
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Elena V Dorofeeva
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Olga I Lutonina
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Ilya V Fateev
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Olga N Zhavoronkova
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Arthur R Bashorin
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Alexandra O Arnautova
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Olga S Smirnova
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Konstantin V Antonov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Alexander S Paramonov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Maxim A Dubinnyi
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
- Department of Biological and Medical Physics, Moscow Institute of Physics and Technology (State University), 9 Institutskiy per., Dolgoprudny, 141700 Moscow, Russia
| | - Roman S Esipov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Anatoly I Miroshnikov
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
| | - Irina D Konstantinova
- Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya St. 16/10, 117997 Moscow, Russia
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Das A, Sarkar P, Maji S, Pati SK, Mandal SK. Mesoionic N-Heterocyclic Imines as Super Nucleophiles in Catalytic Couplings of Amides with CO 2. Angew Chem Int Ed Engl 2022; 61:e202213614. [PMID: 36259383 DOI: 10.1002/anie.202213614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Indexed: 11/07/2022]
Abstract
An extended class of stable mesoionic N-heterocyclic imines (mNHIs), containing a highly polarized exocyclic imine moiety, were synthesized. The calculated proton affinities (PA) and experimentally determined Tolman electronic parameters (TEPs) reveal that these synthesized mNHIs have the highest basicity and donor ability among NHIs reported so far. The superior nucleophilicity of newly designed mNHIs was utilized in devising a strategy to incorporate CO2 as a bridging unit under reductive conditions to couple inert primary amides. This strategy was further extended to hetero-couplings between amide and amine using CO2 . These hitherto unknown catalytic transformations were introduced in the diversification of various biologically active drug molecules under metal-free conditions. The underlying mechanism was explored by performing a series of control experiments, characterizing key intermediates using spectroscopic and crystallographic techniques.
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Affiliation(s)
- Arpan Das
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur-741246, Nadia, India
| | - Pallavi Sarkar
- Department Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, 560064, India
| | - Subir Maji
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur-741246, Nadia, India
| | - Swapan K Pati
- Department Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, 560064, India
| | - Swadhin K Mandal
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur-741246, Nadia, India
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3
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Sustainable Low-Volume Analysis of Environmental Samples by Semi-Automated Prioritization of Extracts for Natural Product Research (SeaPEPR). Mar Drugs 2020; 18:md18120649. [PMID: 33348536 PMCID: PMC7765863 DOI: 10.3390/md18120649] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 12/09/2020] [Accepted: 12/11/2020] [Indexed: 12/17/2022] Open
Abstract
The discovery of novel natural products (NPs) that will serve as lead structures has to be an ongoing effort to fill the respective development pipelines. However, identification of NPs, which possess a potential for application in e.g., the pharma or agro sector, must be as cost effective and fast as possible. Furthermore, the amount of sample available for initial testing is usually very limited, not least because of the fact that the impact on the environment, i.e., the sampled biosystem, should be kept minimal. Here, our pipeline SeaPEPR is described, in which a primary bioactivity screening of crude extracts is combined with the analysis of their metabolic fingerprint. This enabled prioritization of samples for subsequent microfractionation and dereplication of the active compounds early in the workflow. As a case study, 76 marine sponge-derived extracts were screened against a microbial screening panel. Thereunder, human pathogenic bacteria (Escherichia coli ATCC35218 and Staphylococcus aureus ATCC33592) and yeast (Candida albicans FH2173), as well as the phytopathogenic fungus Septoria tritici MUCL45407. Overall, nine extracts revealed activity against at least one test organism. Metabolic fingerprinting enabled assigning four active extracts into one metabolic group; therefore, one representative was selected for subsequent microfractionation. Dereplication of the active fractions showed a new dibrominated aplysinopsin and a hypothetical chromazonarol stereoisomer derivative. Furthermore, inhibitory activity against the common plant pest Septoria tritici was discovered for NPs of marine origin.
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Sheehy KJ, Bateman LM, Flosbach NT, Breugst M, Byrne PA. Identification of N‐ or O‐Alkylation of Aromatic Nitrogen Heterocycles and
N
‐Oxides Using
1
H–
15
N HMBC NMR Spectroscopy. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000329] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Kevin J. Sheehy
- School of Chemistry Analytical and Biological Chemistry Research Facility University College Cork Kane Building T12 K8AF Cork Ireland
| | - Lorraine M. Bateman
- School of Chemistry Analytical and Biological Chemistry Research Facility University College Cork Kane Building T12 K8AF Cork Ireland
- School of Pharmacy University College Cork Cork Ireland
- SSPC (Synthesis and Solid State Pharmaceutical Centre) Cork Ireland
| | - Niko T. Flosbach
- Department für Chemie Universität zu Köln Greinstraße 4 50939 Köln Germany
| | - Martin Breugst
- Department für Chemie Universität zu Köln Greinstraße 4 50939 Köln Germany
| | - Peter A. Byrne
- School of Chemistry Analytical and Biological Chemistry Research Facility University College Cork Kane Building T12 K8AF Cork Ireland
- SSPC (Synthesis and Solid State Pharmaceutical Centre) Cork Ireland
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5
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Paulsen B, Gundersen LL. The First Synthesis of (-)-Agelasine F; an Antimycobacterial Natural Product Found in Marine Sponges in the Agelas
Genus. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Britt Paulsen
- Department of Chemistry; University of Oslo; P. O. Box 1033 0315 Oslo Blindern Norway
| | - Lise-Lotte Gundersen
- Department of Chemistry; University of Oslo; P. O. Box 1033 0315 Oslo Blindern Norway
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7
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Paulsen B, Fredriksen KA, Petersen D, Maes L, Matheeussen A, Naemi AO, Scheie AA, Simm R, Ma R, Wan B, Franzblau S, Gundersen LL. Synthesis and antimicrobial activities of N 6-hydroxyagelasine analogs and revision of the structure of ageloximes. Bioorg Med Chem 2019; 27:620-629. [PMID: 30638761 DOI: 10.1016/j.bmc.2019.01.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 12/20/2018] [Accepted: 01/03/2019] [Indexed: 12/14/2022]
Abstract
(+)-N6-Hydroxyagelasine D, the enantiomer of the proposed structure of (-)-ageloxime D, as well as N6-hydroxyagelasine analogs were synthesized by selective N-7 alkylation of N6-[tert-butyl(dimethyl)silyloxy]-9-methyl-9H-purin-6-amine in order to install the terpenoid side chain, followed by fluoride mediated removal of the TBDMS-protecting group. N6-Hydroxyagelasine D and the analog carrying a geranylgeranyl side chain displayed profound antimicrobial activities against several pathogenic bacteria and protozoa and inhibited bacterial biofilm formation. However these compounds were also toxic towards mammalian fibroblast cells (MRC-5). The spectral data of N6-hydroxyagelasine D did not match those reported for ageloxime D before. Hence, a revised structure of ageloxime D was proposed. Basic hydrolysis of agelasine D gave (+)-N-[4-amino-6-(methylamino)pyrimidin-5-yl]-N-copalylformamide, a compound with spectral data in full agreement with those reported for (-)-ageloxime D.
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Affiliation(s)
- Britt Paulsen
- Department of Chemistry, University of Oslo, P.O.Box 1033, Blindern, 0315 Oslo, Norway
| | - Kim Alex Fredriksen
- Department of Chemistry, University of Oslo, P.O.Box 1033, Blindern, 0315 Oslo, Norway
| | - Dirk Petersen
- Department of Chemistry, University of Oslo, P.O.Box 1033, Blindern, 0315 Oslo, Norway
| | - Louis Maes
- Laboratory of Microbiology, Parasitology and Hygiene (LMPH), University of Antwerp, Wilrijk, Belgium
| | - An Matheeussen
- Laboratory of Microbiology, Parasitology and Hygiene (LMPH), University of Antwerp, Wilrijk, Belgium
| | - Ali-Oddin Naemi
- Institute of Oral Biology, University of Oslo, P.O. Box 1052, Blindern, 0316 Oslo, Norway
| | - Anne Aamdal Scheie
- Institute of Oral Biology, University of Oslo, P.O. Box 1052, Blindern, 0316 Oslo, Norway
| | - Roger Simm
- Institute of Oral Biology, University of Oslo, P.O. Box 1052, Blindern, 0316 Oslo, Norway
| | - Rui Ma
- Institute for Tuberculosis Research, University of Illinois at Chicago, 833 S. Wood St., Chicago, IL, USA
| | - Baojie Wan
- Institute for Tuberculosis Research, University of Illinois at Chicago, 833 S. Wood St., Chicago, IL, USA
| | - Scott Franzblau
- Institute for Tuberculosis Research, University of Illinois at Chicago, 833 S. Wood St., Chicago, IL, USA
| | - Lise-Lotte Gundersen
- Department of Chemistry, University of Oslo, P.O.Box 1033, Blindern, 0315 Oslo, Norway.
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Wåhlander J, Amedjkouh M, Gundersen LL. Synthesis directed towards trans-clerodanes employing an exo-selective Diels–Alder reaction as a key-step. MONATSHEFTE FUR CHEMIE 2018. [DOI: 10.1007/s00706-018-2277-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Gruzdev DA, Musiyak VV, Levit GL, Krasnov VP, Charushin VN. Purine derivatives with antituberculosis activity. RUSSIAN CHEMICAL REVIEWS 2018. [DOI: 10.1070/rcr4772] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The review summarizes the data published over the last 10 – 15 years concerning the key groups of purine derivatives with antituberculosis activity. The structures of purines containing heteroatoms (S, O, N), fragments of heterocycles, amino acids and peptides, in the 6-position, as well as of purine nucleosides are presented. The possible targets for the action of such compounds and structure – activity relationship are discussed. Particular attention is paid to the most active compounds, which are of considerable interest as a basis for the development of efficient antituberculosis drugs.
The bibliography includes 99 references.
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García PA, Valles E, Díez D, Castro MÁ. Marine Alkylpurines: A Promising Group of Bioactive Marine Natural Products. Mar Drugs 2018; 16:md16010006. [PMID: 29301246 PMCID: PMC5793054 DOI: 10.3390/md16010006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 12/16/2017] [Accepted: 12/19/2017] [Indexed: 11/16/2022] Open
Abstract
Marine secondary metabolites with a purine motif in their structure are presented in this review. The alkylpurines are grouped according to the size of the alkyl substituents and their location on the purine ring. Aspects related to the marine source, chemical structure and biological properties are considered together with synthetic approaches towards the natural products and bioactive analogues. This review contributes to studies of structure–activity relationships for these metabolites and highlights the potential of the sea as a source of new lead compounds in diverse therapeutic fields.
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Affiliation(s)
- Pablo A García
- Department of Pharmaceutical Sciences, Medicinal Chemistry Section, Pharmacy Faculty, CIETUS, IBSAL, University of Salamanca, E-37007 Salamanca, Spain.
| | - Elena Valles
- Department of Pharmaceutical Sciences, Medicinal Chemistry Section, Pharmacy Faculty, CIETUS, IBSAL, University of Salamanca, E-37007 Salamanca, Spain.
| | - David Díez
- Department of Organic Chemistry, Faculty of Chemical Sciences, University of Salamanca, E-37008 Salamanca, Spain.
| | - María-Ángeles Castro
- Department of Pharmaceutical Sciences, Medicinal Chemistry Section, Pharmacy Faculty, CIETUS, IBSAL, University of Salamanca, E-37007 Salamanca, Spain.
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Chamgordani EJ, Paulsen J, Gundersen LL. Selective N-7 alkylation of 3-methylhypoxanthine; the first synthesis of malonganenone J. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.09.078] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Synthesis and antiproliferative activity of 6-phenylaminopurines. Eur J Med Chem 2014; 87:421-8. [DOI: 10.1016/j.ejmech.2014.09.093] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 09/09/2014] [Accepted: 09/29/2014] [Indexed: 12/19/2022]
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Roggen H, Charnock C, Burman R, Felth J, Larsson R, Bohlin L, Gundersen LL. Antimicrobial and antineoplastic activities of agelasine analogs modified in the purine 2-position. Arch Pharm (Weinheim) 2010; 344:50-5. [PMID: 21213351 DOI: 10.1002/ardp.201000148] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2010] [Revised: 06/21/2010] [Accepted: 06/23/2010] [Indexed: 11/06/2022]
Abstract
Agelasines are 7,9-dialkylpurinium salts found in marine sponges (Agelas sp.), which display a variety of antimicrobial and cytotoxic effects. We have synthesized simplified agelasine analogs modified in the purine 2-position and examined their antimicrobial and anticancer activities. The compounds were screened against Staphylococcus aureus, Escherichia coli, Mycobacterium tuberculosis, Candida krusei, and Candida albicans, protozoa causing tropical diseases (Plasmodium falciparum, Leishmania infantum, Trypanosoma cruzi, and Trypanosoma brucei), a panel of human cancer cell lines (U-937 GTB, RPMI 8226/s, CEM/s, and ACHN) as well as VERO and/or MRC-5 cells. The results indicate that the introduction of a methyl group in the purine 2-position is beneficial for antimycobacterial and antiprotozoal activity, and that amino groups may enhance activity against several cancer cell lines.
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Affiliation(s)
- Heidi Roggen
- Department of Chemistry, University of Oslo, Blindern, Oslo, Norway
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Calculated tautomeric equilibria and X-ray structures of 2-substituted N-methoxy-9-methyl-9H-purin-6-amines. Theor Chem Acc 2010. [DOI: 10.1007/s00214-010-0850-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Abstract
Agelasines, asmarines and related compounds are natural products with a hybrid terpene-purine structure isolated from numerous genera of sponges (Agela sp., Raspailia sp.). Some agelasine analogs and related structures have displayed high general toxicity towards protozoa, and have exhibited broad-spectrum antimicrobial activity against a variety of species, including Mycobacterium tuberculosis, and also an important cytotoxic activity against several cancer cell lines, including multidrug-resistant ones. Of particular interest in this context are the asmarines (tetrahydro[1,4]diazepino[1,2,3-g,h]purines), which have shown potent antiproliferative activity against several types of human cancer cell lines. This review summarizes the sources of isolation, chemistry and bioactivity of marine alkylpurines and their bioactive derivatives.
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The first total synthesis of heteromine B, and an improved synthesis of heteromine A; natural products with antitumor activities. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.04.100] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Screening of agelasine D and analogs for inhibitory activity against pathogenic protozoa; identification of hits for visceral leishmaniasis and Chagas disease. Molecules 2009; 14:279-88. [PMID: 19136916 PMCID: PMC6253839 DOI: 10.3390/molecules14010279] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2008] [Revised: 12/29/2008] [Accepted: 01/04/2009] [Indexed: 11/17/2022] Open
Abstract
There is an urgent need for novel and improved drugs against several tropical diseases caused by protozoa. The marine sponge (Agelas sp.) metabolite agelasine D, as well as other agelasine analogs and related structures were screened for inhibitory activity against Plasmodium falciparum, Leishmania infantum, Trypanosoma brucei and T. cruzi, as well as for toxicity against MRC-5 fibroblast cells. Many compounds displayed high general toxicity towards both the protozoa and MRC-5 cells. However, two compounds exhibited more selective inhibitory activity against L. infantum (IC50 <0.5 μg/mL) while two others displayed IC50 <1 μg/mL against T. cruzi in combination with relatively low toxicity against MRC-5 cells. According to criteria set up by the WHO Special Programme for Research & Training in Tropical Diseases (TDR), these compounds could be classified as hits for leishmaniasis and for Chagas disease, respectively. Identification of the hits as well as other SAR data from this initial screening will be valuable for design of more potent and selective potential drugs against these neglected tropical diseases.
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