1
|
Żołek T, Dömötör O, Żabiński J. Binding mechanism of pentamidine derivatives with human serum acute phase protein α 1-acid glycoprotein. Int J Biol Macromol 2024; 266:131405. [PMID: 38582487 DOI: 10.1016/j.ijbiomac.2024.131405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 04/02/2024] [Accepted: 04/03/2024] [Indexed: 04/08/2024]
Abstract
Drug binding and interactions with plasma proteins play a crucial role in determining the efficacy of drug delivery, thus significantly impacting the overall pharmacological effect. AGP, the second most abundant plasma protein in blood circulation, has the unique capability to bind drugs and transport various compounds. In our present study, for the first time, we investigated whether AGP, a major component of the acute phase lipocalin in human plasma, can bind with pentamidine derivatives known for their high activity against the fungal pathogen Pneumocystis carinii. This investigation was conducted using integrated spectroscopic techniques and computer-based approaches. According to the results, it was concluded that compounds having heteroatoms (-NCH3) in the aliphatic linker and the addition of a Br atom and a methoxy substituent at the C-2 and C-6 positions on the benzene ring, exhibit strong interactions with the AGP binding site. These compounds are identified as potential candidates for recognition by this protein. MD studies indicated that the tested analogues complexed with AGPs reach an equilibrium state after 60 ns, suggesting the stability of the complexes. This observation was further corroborated by experimental results. Therefore, exploring the interaction mechanism of pentamidine derivatives with plasma proteins holds promise for the development of bis-benzamidine-designed pharmaceutically important drugs.
Collapse
Affiliation(s)
- Teresa Żołek
- Department of Organic and Physical Chemistry, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1, 02-097 Warsaw, Poland.
| | - Orsolya Dömötör
- Department of Molecular and Analytical Chemistry, Interdisciplinary Excellence Centre, University of Szeged, Dóm tér 7-8, 6720 Szeged, Hungary
| | - Jerzy Żabiński
- Department of Organic and Physical Chemistry, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1, 02-097 Warsaw, Poland
| |
Collapse
|
2
|
Barajas-Solano C, Muñoz B, Chicano-Gálvez E, Escobar P, Mejía-Ospino E. Discriminator for Cutaneous Leishmaniasis Using MALDI-MSI in a Murine Model. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2022; 33:952-960. [PMID: 35549471 DOI: 10.1021/jasms.2c00015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Cutaneous leishmaniasis is a skin disease caused by flagellate protozoa of the genus Leishmania and transmitted by sandflies of the genus Lutzomyia. Around 1 million new cases occur in the world annually, with a total of 12 million people affected, mainly in rural areas with low access to health services and adequate treatments. In the area of the Americas, Colombia has one of the highest infection rates after Brazil. Topical treatments with pentamidine isethionate (PMD) present an attractive alternative due to their ease of application and low costs. However, cutaneous leishmaniasis lesions present nodules with seropurulent exudate that, when drying, form hyperkeratotic lesions, hindering the effective penetration of drugs for their treatment. The use of molecular histology techniques, such as MALDI-MSI, allow in situ evaluation of the penetration of the treatment to the sections of the dermis where the disease-causing parasite resides. However, the large volume of information generated makes it impossible to process it manually. Machine learning techniques allow the unsupervised processing of large amounts of information, generating prediction models for the classification of new information. This work proposes a low-cost method to generate cutaneous leishmaniasis detection and classification models using MALDI-MSI images taken from murine models. The proposed models allow a 95% efficiency when separating healthy samples from infected samples and an effectiveness of 67% when separating effectively treated samples from unsuccessfully treated samples.
Collapse
Affiliation(s)
- Crisostomo Barajas-Solano
- Systems Engineering Department, Universidad de Investigación y Desarrollo, 687033 Barrancabermeja, Colombia
| | - Betsy Muñoz
- Center of Research in Tropical Diseases (CINTROP), Universidad Industrial de Santander, 680002 Bucaramanga, Colombia
| | - Eduardo Chicano-Gálvez
- Maimónides Institute of Biomedical Research of Córdoba (IMIBIC), Proteomic Unit, 14004 Córdoba Spain
| | - Patricia Escobar
- Center of Research in Tropical Diseases (CINTROP), Universidad Industrial de Santander, 680002 Bucaramanga, Colombia
| | - Enrique Mejía-Ospino
- Laboratorio de Espectroscopia Atómica y Molecular (LEAM), Universidad Industrial de Santander, 680002 Bucaramanga, Colombia
| |
Collapse
|
3
|
Borah G, Dam B, Patel BK. Ortho
‐Functionalization of Benzimidates and Benzamidines. ChemistrySelect 2022. [DOI: 10.1002/slct.202104583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Gongutri Borah
- Department of Chemistry Indian Institute of Technology Guwahati, North Guwahati Guwahati 781039 Assam India
| | - Binoyargha Dam
- Department of Chemistry Indian Institute of Technology Guwahati, North Guwahati Guwahati 781039 Assam India
| | - Bhisma K. Patel
- Department of Chemistry Indian Institute of Technology Guwahati, North Guwahati Guwahati 781039 Assam India
| |
Collapse
|
4
|
Dron MY, Zhigulin AS, Barygin OI. Mechanisms of NMDA receptor inhibition by diarylamidine compounds. Eur J Neurosci 2019; 51:1573-1582. [PMID: 31605636 DOI: 10.1111/ejn.14589] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 09/30/2019] [Accepted: 10/04/2019] [Indexed: 12/19/2022]
Abstract
Pentamidine, diminazene and 4',6-diamidino-2-phenylindole (DAPI) are antiprotozoal diarylamidine compounds. In the present work, we have studied their action on native N-methyl-D-aspartate (NMDA) receptors in rat hippocampal pyramidal neurons. All three compounds inhibited NMDA receptors at -80 mV holding voltage with IC50 of 0.41 ± 0.08, 13 ± 3 and 3.1 ± 0.6 μM, respectively. The inhibition by pentamidine was strongly voltage-dependent, while that of DAPI was practically voltage-independent. Inhibition by diminazene had both voltage-dependent and voltage-independent components. Diminazene and DAPI demonstrated tail currents and overshoots suggesting "foot-in-the-door" mechanism of action. In contrast, pentamidine was partially trapped in the closed NMDA receptor channels. Such difference in the mechanism of action can be explained by the difference in the 3D structure of compounds. In the pentamidine molecule, two benzamidine groups are connected with a flexible linker, which allows the molecule to fold up and fit in the cavity of a closed NMDA receptor channel. Diminazene and DAPI, in contrast, have an extended form and could not be trapped.
Collapse
Affiliation(s)
- Mikhail Y Dron
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry RAS, Saint-Petersburg, Russia
| | - Arseniy S Zhigulin
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry RAS, Saint-Petersburg, Russia
| | - Oleg I Barygin
- I.M. Sechenov Institute of Evolutionary Physiology and Biochemistry RAS, Saint-Petersburg, Russia
| |
Collapse
|
5
|
Monier M, El-Mekabaty A, Elattar KM. Five-membered ring systems with one heteroatom: Synthetic routes, chemical reactivity, and biological properties of furan-carboxamide analogues. SYNTHETIC COMMUN 2018. [DOI: 10.1080/00397911.2017.1421227] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- M. Monier
- Department of Chemistry, Faculty of Science, Taibah University, Yanbu, KSA
| | - Ahmed El-Mekabaty
- Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Khaled M. Elattar
- Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, Egypt
| |
Collapse
|
6
|
Zhang D, Liu R, Zhou X. Intramolecular alkene hydroamination and degradation of amidines: divergent behavior of rare earth metal amidinate intermediates. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01481g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The methods for catalytic intramolecular alkene hydroamination and degradation of amidines have been established. Furthermore, a tandem reconstruction/cyclization of amidines has also been developed.
Collapse
Affiliation(s)
- Dexing Zhang
- Department of Chemistry
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- Fudan University
- Shanghai 200433
- China
| | - Ruiting Liu
- Department of Chemistry
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- Fudan University
- Shanghai 200433
- China
| | - Xigeng Zhou
- Department of Chemistry
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials
- Fudan University
- Shanghai 200433
- China
| |
Collapse
|
7
|
Karaaslan C, Bakar F, Goker H. Antiproliferative activity of synthesized some new benzimidazole carboxamidines against MCF-7 breast carcinoma cells. ACTA ACUST UNITED AC 2017; 73:137-145. [DOI: 10.1515/znc-2017-0067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 08/20/2017] [Indexed: 11/15/2022]
Abstract
Abstract
Breast cancer is the most endemic cause of cancer among women in both developed and developing countries. Benzimidazole derivatives exemplify one of the chemical classes that show strong cytotoxic activity especially against breast cancer cells (MCF-7). Aromatic amidine derivatives are known as a group of DNA interactive compounds that bind minor groove of the genome, especially A-T base pairs, and show significant in vitro and in vivo toxicity toward cancer cells. In light of these studies, some new mono/dicationic amidino benzimidazole derivatives were synthesized and evaluated for cytotoxic activity on cultured MCF-7 breast cancer cells. Some of these compounds have strongly inhibited MCF-7 cell viability in a dose-dependent manner compared with clinically used reference compounds, imatinib mesylate and docetaxel. Among them, 4-[(5(6)-bromo-1H-benzimidazole-2-yl)amino]benzene-1-carboxamidine (30) showed the best inhibitory activity with IC50 value of 4.6 nM.
Collapse
Affiliation(s)
- Cigdem Karaaslan
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy , Ankara University , 06100 Tandogan , Ankara, Turkey
| | - Filiz Bakar
- Department of Biochemistry, Faculty of Pharmacy , Ankara University , 06100 Tandogan , Ankara, Turkey
| | - Hakan Goker
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy , Ankara University , 06100 Tandogan , Ankara, Turkey
| |
Collapse
|
8
|
Omrani R, Efrit ML, Akacha AB. Reactivity of Phosphonothioamidates with Acid Chlorides and Primary Amines: Synthesis and Conformational Study of N-Acylated Phosphonothioamidates and Phosphonoamidines. PHOSPHORUS SULFUR 2015. [DOI: 10.1080/10426507.2015.1071372] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- R. Omrani
- Laboratory of Heterocyclic and Organic Synthesis, Department of Chemistry, Faculty of Science, University El Manar, Tunis-Tunisia
| | - M. L. Efrit
- Laboratory of Heterocyclic and Organic Synthesis, Department of Chemistry, Faculty of Science, University El Manar, Tunis-Tunisia
| | - A. Ben Akacha
- Laboratory of Heterocyclic and Organic Synthesis, Department of Chemistry, Faculty of Science, University El Manar, Tunis-Tunisia
| |
Collapse
|
9
|
Sović I, Viskić M, Bertoša B, Ester K, Kralj M, Hranjec M, Karminski-Zamola G. Exploring antiproliferative activity of heteroaromatic amides and their fused derivatives using 3D-QSAR, synthesis, and biological tests. MONATSHEFTE FUR CHEMIE 2015. [DOI: 10.1007/s00706-015-1478-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
10
|
Berger ML, Maciejewska D, Vanden Eynde JJ, Mottamal M, Żabiński J, Kaźmierczak P, Rezler M, Jarak I, Piantanida I, Karminski-Zamola G, Mayence A, Rebernik P, Kumar A, Ismail MA, Boykin DW, Huang TL. Pentamidine analogs as inhibitors of [(3)H]MK-801 and [(3)H]ifenprodil binding to rat brain NMDA receptors. Bioorg Med Chem 2015; 23:4489-4500. [PMID: 26117647 DOI: 10.1016/j.bmc.2015.06.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 06/05/2015] [Accepted: 06/05/2015] [Indexed: 12/29/2022]
Abstract
The anti-protozoal drug pentamidine is active against opportunistic Pneumocystis pneumonia, but in addition has several other biological targets, including the NMDA receptor (NR). Here we describe the inhibitory potencies of 76 pentamidine analogs at 2 binding sites of the NR, the channel binding site labeled with [(3)H]MK-801 and the [(3)H]ifenprodil binding site. Most analogs acted weaker at the ifenprodil than at the channel site. The spermine-sensitivity of NR inhibition by the majority of the compounds was reminiscent of other long-chain dicationic NR blockers. The potency of the parent compound as NR blocker was increased by modifying the heteroatoms in the bridge connecting the 2 benzamidine moieties and also by integrating the bridge into a seven-membered ring. Docking of the 45 most spermine-sensitive bisbenzamidines to a recently described acidic interface between the N-terminal domains of GluN1 and GluN2B mediating polyamine stimulation of the NR revealed the domain contributed by GluN1 as the most relevant target.
Collapse
Affiliation(s)
- Michael L Berger
- Center for Brain Research, Medical University of Vienna, Vienna, Austria.
| | - Dorota Maciejewska
- Department of Organic Chemistry, Medical University of Warsaw, Warsaw, Poland
| | | | | | - Jerzy Żabiński
- Department of Organic Chemistry, Medical University of Warsaw, Warsaw, Poland
| | - Paweł Kaźmierczak
- Department of Organic Chemistry, Medical University of Warsaw, Warsaw, Poland
| | - Mateusz Rezler
- Department of Organic Chemistry, Medical University of Warsaw, Warsaw, Poland
| | - Ivana Jarak
- Department of Organic Chemistry, University of Zagreb, Zagreb, Croatia
| | - Ivo Piantanida
- Department of Organic Chemistry, University of Zagreb, Zagreb, Croatia
| | | | - Annie Mayence
- College of Pharmacy, Xavier University of Louisiana, New Orleans, USA
| | - Patrick Rebernik
- Center for Brain Research, Medical University of Vienna, Vienna, Austria
| | - Arvind Kumar
- Department of Chemistry, Georgia State University, Atlanta, GA, USA
| | - Mohamed A Ismail
- Department of Chemistry, Georgia State University, Atlanta, GA, USA
| | - David W Boykin
- Department of Chemistry, Georgia State University, Atlanta, GA, USA
| | - Tien L Huang
- College of Pharmacy, Xavier University of Louisiana, New Orleans, USA
| |
Collapse
|
11
|
Synthesis and antifungal activity of benzamidine derivatives carrying 1,2,3-triazole moieties. Molecules 2014; 19:5674-91. [PMID: 24796390 PMCID: PMC6270668 DOI: 10.3390/molecules19055674] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 04/20/2014] [Accepted: 04/25/2014] [Indexed: 12/04/2022] Open
Abstract
Eighteen novel benzamidine derivatives containing 1,2,3-triazole moieties were synthesized. The in vitro and in vivo fungicidal acitivities of the title compounds and the arylamidine intermediates against Colletotrichum lagenarium and Botrytis cinerea were tested. The synthesized benzamidines exhibited weak antifungal activities in vitro against the tested fungi, but some of the compounds showed excellent activities in vivo to the same strains. Among the compounds tested, 9b showed 79% efficacy in vivo against C. lagenarium at a concentration of 200 μg/mL, and the efficacy of compound 16d (90%) toward the same strain was even superior than that of the commercial fungicide carbendazim (85%).
Collapse
|
12
|
Maciejewska D, Żabiński J, Kaźmierczak P, Wójciuk K, Kruszewski M, Kruszewska H. In vitro screening of pentamidine analogs against bacterial and fungal strains. Bioorg Med Chem Lett 2014; 24:2918-23. [PMID: 24830598 DOI: 10.1016/j.bmcl.2014.04.075] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 04/16/2014] [Accepted: 04/21/2014] [Indexed: 12/20/2022]
Abstract
A series of linear pentamidine analogs exhibiting low cytotoxicity, active against Pneumocystis carinii, were evaluated for in vitro activities against bacterial and fungal strains. The majority of the tested bis-amidines exhibited marked activities against Gram-positive strains. In view of the fact that the highest potency was found for 1,5-bis(4-amidinophenoxy)-3-thiapentane dihydrochloride 1j with the S atom in the middle of the aliphatic linker, four new pentamidines bearing S atoms were synthesized and also evaluated against MRSA strains. N,N'-Dialkylated pentamidines with S atoms in the linker are the promising lead structures for antimicrobials development.
Collapse
Affiliation(s)
- Dorota Maciejewska
- Department of Organic Chemistry, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1, 02-097 Warsaw, Poland.
| | - Jerzy Żabiński
- Department of Organic Chemistry, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1, 02-097 Warsaw, Poland
| | - Paweł Kaźmierczak
- Department of Organic Chemistry, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1, 02-097 Warsaw, Poland
| | - Karolina Wójciuk
- Centre for Radiobiology and Biological Dosimetry, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland
| | - Marcin Kruszewski
- Centre for Radiobiology and Biological Dosimetry, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; Department of Molecular Biology and Translational Research, Institute of Rural Health, Jaczewskiego 2, 20-090 Lublin, Poland
| | - Hanna Kruszewska
- National Medicines Institute, Department of Antibiotics and Microbiology, 30/34 Chełmska, 00-725 Warsaw, Poland
| |
Collapse
|
13
|
DNA Binding Property and Antitumor Evaluation of Xanthone with Dimethylamine Side Chain. J Fluoresc 2014; 24:959-66. [DOI: 10.1007/s10895-014-1380-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Accepted: 03/19/2014] [Indexed: 12/27/2022]
|
14
|
Chiacchio U, Barbera V, Bonfanti R, Broggini GL, Campisi A, Gazzola S, Parenti R, Romeo G. Synthesis and biological evaluation of 1,7,8,8a-tetrahydro-3H-oxazolo[3,4-a]pyrazin-6(5H)-ones as antitumoral agents. Bioorg Med Chem 2013; 21:5748-53. [PMID: 23916151 DOI: 10.1016/j.bmc.2013.07.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 07/08/2013] [Accepted: 07/09/2013] [Indexed: 10/26/2022]
Abstract
A series of 1,7,8,8a-tetrahydro-3H-oxazolo[3,4-a]pyrazin-6(5H)-ones has been synthesized by an intramolecular, palladium(II) catalyzed, aminooxygenation of alkenyl ureas, readily available from glycine allylamides as starting materials. Biological tests showed that the obtained compounds are endowed with an interesting antitumoral activity against two human thyroid cancer cell lines, namely FTC-133 and 8305C, by promoting the apoptotic pathway and DNA fragmentation.
Collapse
Affiliation(s)
- Ugo Chiacchio
- Dipartimento di Scienze del Farmaco, Università di Catania, Italy.
| | | | | | | | | | | | | | | |
Collapse
|
15
|
Ahmed S, Sharif M, Shoaib K, Reimann S, Iqbal J, Patonay T, Spannenberg A, Langer P. Synthesis of 2,6-diaryl-3-(trifluoromethyl)pyridines by regioselective Suzuki–Miyaura reactions of 2,6-dichloro-3-(trifluoromethyl)pyridine. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.01.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
16
|
El-Sayed WM, Hussin WA. Antimutagenic and antioxidant activity of novel 4-substituted phenyl-2,2'-bichalcophenes and aza-analogs. DRUG DESIGN DEVELOPMENT AND THERAPY 2013; 7:73-81. [PMID: 23430305 PMCID: PMC3573810 DOI: 10.2147/dddt.s40129] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Indexed: 11/23/2022]
Abstract
Evaluation of the potential antimutagenic activities of new compounds by Ames assay has been of great interest for the development of novel therapeutics for many diseases including cancer. Ten novel bichalcophenes with in vitro and in vivo broad spectrum activities against various microbial strains were investigated throughout the present study for their cytotoxic, antioxidant, and antimutagenic potential in a Salmonella reverse mutation assay system against sodium azide (NaN(3)) and benzo[a]pyrene (B[a]P). At nontoxic concentrations, all bichalcophenes alone or in combination with NaN(3) (1 μg/plate) or B[a]P (20 μM) with S9 mix were not mutagenic. The bichalcophenes significantly reduced NaN(3)- and B[a]P-induced mutagenicity under pre-exposure and co-exposure conditions in a concentration-independent manner. However, the antimutagenic activity of bichalcophenes against B[a]P varied depending on the exposure regimen, being more effective under pre-exposure conditions. The antimutagenic activity was correlated with a high antioxidant activity that could promote the DNA repair system. Bichalcophenes are least likely to interfere with the microsomal bioactivation of B[a]P. Monocationic bichalcophenes were superior to the corresponding mononitriles as antimutagenic agents against both mutagens investigated, possibly due to the higher nucleophilic centers they have which could bind and protect the bacterial DNA. Three monocationic compounds were shown to have a strong anticancer activity against the 58 cell line. Based on the results of the present investigation, monocationic compounds (1, 4, and 5B) will be selected for further time consuming and costly chemoprevention studies in animal models.
Collapse
Affiliation(s)
- Wael M El-Sayed
- King Faisal University, Faculty of Science, Departments of Biological Sciences and Chemistry, Al-Hufof, Ahsa, Kingdom of Saudi Arabia
| | | |
Collapse
|
17
|
Anthranilic acid-based diamides derivatives incorporating aryl-isoxazoline pharmacophore as potential anticancer agents: Design, synthesis and biological evaluation. Eur J Med Chem 2012; 54:549-56. [DOI: 10.1016/j.ejmech.2012.06.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Revised: 05/26/2012] [Accepted: 06/01/2012] [Indexed: 11/24/2022]
|
18
|
Racané L, Kraljević Pavelić S, Ratkaj I, Stepanić V, Pavelić K, Tralić-Kulenović V, Karminski-Zamola G. Synthesis and antiproliferative evaluation of some new amidino-substituted bis-benzothiazolyl-pyridines and pyrazine. Eur J Med Chem 2012; 55:108-16. [PMID: 22841279 DOI: 10.1016/j.ejmech.2012.07.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 07/02/2012] [Accepted: 07/04/2012] [Indexed: 01/26/2023]
Abstract
Novel diamidino substituted conformationally restricted derivatives of bis-benzothiazolyl-pyridines and pyrazine were synthesized and their antiproliferative activity against several human cancer cell lines were determinated. The synthetic approach used for preparation of isomeric amidinobenzotiazolyl disubstituted pyridines 3a-3k and pyrazine 3l was achieved by condenzation reaction of commercially available pyridine and pyrazine dicarboxylic acids with amidino- 2a and 2-imidazolinyl-substituted 2-aminothiophenol 2b in polyphosphoric acid in moderate to good yield. The condenzation reaction was greatly optimized. The targeted compounds were converted in the desired water soluble dihydrochloride salts by reaction of appropriate free base with concd HCl in ethanol or acetic acid. Antiproliferative assays revealed significant differences in antiproliferative activities of diamidino- and diimidazolinyl-derivatives, the latter exerting stronger concentration-dependent antiproliferative effects on tested tumor cell lines and thus being a prominent compound class for further chemical optimization and biological studies. Biological studies on SW620 cell line and BJ fibroblasts performed for the diimidazolinyl-derivative 3b revealed oxidative stress as a possible mechanism of antiproliferative action and predicted antineoplastic properties for this class of compounds.
Collapse
Affiliation(s)
- Livio Racané
- Department of Applied Chemistry, Faculty of Textile Technology, University of Zagreb, baruna Filipovića 28a 10000 Zagreb, Croatia
| | | | | | | | | | | | | |
Collapse
|
19
|
Yu D, Lee S, Sum YN, Zhang Y. Selective Formation of Formamidines or 7-Aminomethylbenzoxazoles from Unprecedented Couplings between Benzoxazoles and Amines. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100521] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
20
|
Molčanov K, Stolić I, Kojić-Prodić B, Bajić M. Bis[2-(4-amino-phen-yl)-4,5-dihydro-1H-imidazol-3-ium] dichloride monohydrate. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o3450-1. [PMID: 22199929 PMCID: PMC3239081 DOI: 10.1107/s1600536811050070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Accepted: 11/22/2011] [Indexed: 11/10/2022]
Abstract
The asymmetric unit of the title compound, 2C9H12N3+·2Cl−·H2O, comprises two molecules, two chloride anions and one molecule of crystal water. In the imidazolinium ring, the protonation contributes to delocalization of the positive charge over the two C—N bonds. Both chloride anions are acceptors of four hydrogen bonds in a flattened tetrahedron environment. The donors are NH2 groups, the NH groups of the imidazolinium rings and the water molecule. These hydrogen bonds and N—H⋯O(H2O) hydrogen bonds form a three-dimensional network.
Collapse
|
21
|
Zhao W, Wang R, Mosey NJ, Petitjean A. Alkoxyamine-derived formamidines: configurational control and molecular folding. Org Lett 2011; 13:5160-3. [PMID: 21870787 DOI: 10.1021/ol202032k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
N,N'-Disubstituted formamidines, and amidines in general, have very rich configurational, conformational, and tautomeric diversities. As part of an effort to incorporate alkoxyamine-derived formamidine units into foldamers, the first evidence for the isolation of the up-to-now unknown E isomer, the conditions for its exclusive formation, its stability and self-assembly properties, and its configurational isomerization to its much more common Z counterpart are reported. Considering the distinctly different H-bonding patterns displayed by both E and Z isomers, such configurational control may find applications in self-assembly, molecular recognition, and biomimetic systems.
Collapse
Affiliation(s)
- Weiwen Zhao
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario K7L 3N6, Canada
| | | | | | | |
Collapse
|