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Vallesi A, Pucciarelli S, Buonanno F, Fontana A, Mangiagalli M. Bioactive molecules from protists: Perspectives in biotechnology. Eur J Protistol 2020; 75:125720. [PMID: 32569992 DOI: 10.1016/j.ejop.2020.125720] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Revised: 05/11/2020] [Accepted: 05/15/2020] [Indexed: 12/14/2022]
Abstract
For hundreds of years, mankind has benefited from the natural metabolic processes of microorganisms to obtain basic products such as fermented foods and alcoholic beverages. More recently, microorganisms have been exploited for the production of antibiotics, vitamins and enzymes to be used in medicine and chemical industries. Additionally, several modern drugs, including those for cancer therapy, are natural products or their derivatives. Protists are a still underexplored source of natural products potentially of interest for biotechnological and biomedical applications. This paper focuses on some examples of bioactive molecules from protists and associated bacteria and their possible use in biotechnology.
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Affiliation(s)
- Adriana Vallesi
- School of Biosciences and Veterinary Medicine, Università degli Studi di Camerino, Camerino (MC), Italy.
| | - Sandra Pucciarelli
- School of Biosciences and Veterinary Medicine, Università degli Studi di Camerino, Camerino (MC), Italy.
| | - Federico Buonanno
- Laboratory of Protistology and Biology Education, Department of E.C.H.T. Università degli Studi di Macerata, Macerata, Italy
| | - Angelo Fontana
- Bio-Organic Chemistry Unit, CNR-Institute of Biomolecular Chemistry, Pozzuoli, Napoli, Italy
| | - Marco Mangiagalli
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milano, Italy
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Buonanno F, Catalani E, Cervia D, Cimarelli C, Marcantoni E, Ortenzi C. Natural Function and Structural Modification of Climacostol, a Ciliate Secondary Metabolite. Microorganisms 2020; 8:E809. [PMID: 32471240 PMCID: PMC7356801 DOI: 10.3390/microorganisms8060809] [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: 05/07/2020] [Accepted: 05/25/2020] [Indexed: 11/16/2022] Open
Abstract
The review highlights the main results of two decades of research on climacostol (5-[(2Z)-non-2-en-1-yl]benzene-1,3-diol), the resorcinolic lipid produced and used by the ciliated protozoan Climacostomum virens for chemical defense against a wide range of predators, and to assist its carnivorous feeding. After the first studies on the physiological function of climacostol, the compound and some analogues were chemically synthesized, thus allowing us to explore both its effect on different prokaryotic and eukaryotic biological systems, and the role of its relevant structural traits. In particular, the results obtained in the last 10 years indicate climacostol is an effective antimicrobial and anticancer agent, bringing new clues to the attempt to design and synthesize additional novel analogues that can increase or optimize its pharmacological properties.
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Affiliation(s)
- Federico Buonanno
- Laboratory of Protistology and Biology Education, Department of Education, Cultural Heritage, and Tourism (ECHT), Università degli Studi di Macerata, 62100 Macerata, Italy;
| | - Elisabetta Catalani
- Department for Innovation in Biological, Agro-food and Forest systems (DIBAF), Università degli Studi della Tuscia, 01100 Viterbo, Italy; (E.C.); (D.C.)
| | - Davide Cervia
- Department for Innovation in Biological, Agro-food and Forest systems (DIBAF), Università degli Studi della Tuscia, 01100 Viterbo, Italy; (E.C.); (D.C.)
| | - Cristina Cimarelli
- School of Science and Technology, Section of Chemistry, Università degli Studi di Camerino, 62032 Camerino, Italy; (C.C.); (E.M.)
| | - Enrico Marcantoni
- School of Science and Technology, Section of Chemistry, Università degli Studi di Camerino, 62032 Camerino, Italy; (C.C.); (E.M.)
| | - Claudio Ortenzi
- Laboratory of Protistology and Biology Education, Department of Education, Cultural Heritage, and Tourism (ECHT), Università degli Studi di Macerata, 62100 Macerata, Italy;
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Catalani E, Buonanno F, Lupidi G, Bongiorni S, Belardi R, Zecchini S, Giovarelli M, Coazzoli M, De Palma C, Perrotta C, Clementi E, Prantera G, Marcantoni E, Ortenzi C, Fausto AM, Picchietti S, Cervia D. The Natural Compound Climacostol as a Prodrug Strategy Based on pH Activation for Efficient Delivery of Cytotoxic Small Agents. Front Chem 2019; 7:463. [PMID: 31316972 PMCID: PMC6609918 DOI: 10.3389/fchem.2019.00463] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 06/11/2019] [Indexed: 12/20/2022] Open
Abstract
We synthesized and characterized MOMO as a new small molecule analog of the cytotoxic natural product climacostol efficiently activated in mild extracellular acidosis. The synthesis of MOMO had a key step in the Wittig olefination for the construction of the carbon-carbon double bond in the alkenyl moiety of climacostol. The possibility of obtaining the target (Z)-alkenyl MOMO derivative in very good yield and without presence of the less active (E)-diastereomer was favored from the methoxymethyl ether (MOM)-protecting group of hydroxyl functions in aromatic ring of climacostol aldehyde intermediate. Of interest, the easy removal of MOM-protecting group in a weakly acidic environment allowed us to obtain a great quantity of climacostol in biologically active (Z)-configuration. Results obtained in free-living ciliates that share the same micro-environment of the climacostol natural producer Climacostomum virens demonstrated that MOMO is well-tolerated in a physiological environment, while its cytotoxicity is rapidly and efficiently triggered at pH 6.3. In addition, the cytostatic vs. cytotoxic effects of acidified-MOMO can be modulated in a dose-dependent manner. In mouse melanoma cells, MOMO displayed a marked pH-sensitivity since its cytotoxic and apoptotic effects become evident only in mild extracellular acidosis. Data also suggested MOMO being preferentially activated in the unique extra-acidic microenvironment that characterizes tumoural cells. Finally, the use of the model organism Drosophila melanogaster fed with an acidic diet supported the efficient activity and oral delivery of MOMO molecule in vivo. MOMO affected oviposition of mating adults and larvae eclosion. Reduced survival of flies was due to lethality during the larval stages while emerging larvae retained their ability to develop into adults. Interestingly, the gut of eclosed larvae exhibited an extended damage (cell death by apoptosis) and the brain tissue was also affected (reduced mitosis), demonstrating that orally activated MOMO efficiently targets different tissues of the developing fly. These results provided a proof-of-concept study on the pH-dependence of MOMO effects. In this respect, MOM-protection emerges as a potential prodrug strategy which deserves to be further investigated for the generation of efficient pH-sensitive small organic molecules as pharmacologically active cytotoxic compounds.
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Affiliation(s)
- Elisabetta Catalani
- Department for Innovation in Biological, Agro-Food and Forest Systems, Università degli Studi della Tuscia, Viterbo, Italy
| | - Federico Buonanno
- Laboratory of Protistology and Biology Education, Department of Education, Cultural Heritage and Tourism, Università degli Studi di Macerata, Macerata, Italy
| | - Gabriele Lupidi
- School of Sciences and Technologies, Section of Chemistry, Università degli Studi di Camerino, Camerino, Italy
| | - Silvia Bongiorni
- Department of Ecological and Biological Sciences, Università degli Studi della Tuscia, Viterbo, Italy
| | - Riccardo Belardi
- Department for Innovation in Biological, Agro-Food and Forest Systems, Università degli Studi della Tuscia, Viterbo, Italy
| | - Silvia Zecchini
- Department of Biomedical and Clinical Sciences “Luigi Sacco” (DIBIC), Università degli Studi di Milano, Milan, Italy
| | - Matteo Giovarelli
- Department of Biomedical and Clinical Sciences “Luigi Sacco” (DIBIC), Università degli Studi di Milano, Milan, Italy
| | - Marco Coazzoli
- Department of Biomedical and Clinical Sciences “Luigi Sacco” (DIBIC), Università degli Studi di Milano, Milan, Italy
| | - Clara De Palma
- Unit of Clinical Pharmacology, University Hospital “Luigi Sacco”-ASST Fatebenefratelli Sacco, Milan, Italy
| | - Cristiana Perrotta
- Department of Biomedical and Clinical Sciences “Luigi Sacco” (DIBIC), Università degli Studi di Milano, Milan, Italy
| | - Emilio Clementi
- Department of Biomedical and Clinical Sciences “Luigi Sacco” (DIBIC), Università degli Studi di Milano, Milan, Italy
- Scientific Institute IRCCS “Eugenio Medea”, Bosisio Parini, Italy
| | - Giorgio Prantera
- Department of Ecological and Biological Sciences, Università degli Studi della Tuscia, Viterbo, Italy
| | - Enrico Marcantoni
- School of Sciences and Technologies, Section of Chemistry, Università degli Studi di Camerino, Camerino, Italy
| | - Claudio Ortenzi
- Laboratory of Protistology and Biology Education, Department of Education, Cultural Heritage and Tourism, Università degli Studi di Macerata, Macerata, Italy
| | - Anna Maria Fausto
- Department for Innovation in Biological, Agro-Food and Forest Systems, Università degli Studi della Tuscia, Viterbo, Italy
| | - Simona Picchietti
- Department for Innovation in Biological, Agro-Food and Forest Systems, Università degli Studi della Tuscia, Viterbo, Italy
| | - Davide Cervia
- Department for Innovation in Biological, Agro-Food and Forest Systems, Università degli Studi della Tuscia, Viterbo, Italy
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Buonanno F, Catalani E, Cervia D, Proietti Serafini F, Picchietti S, Fausto AM, Giorgi S, Lupidi G, Rossi FV, Marcantoni E, Petrelli D, Ortenzi C. Bioactivity and Structural Properties of Novel Synthetic Analogues of the Protozoan Toxin Climacostol. Toxins (Basel) 2019; 11:toxins11010042. [PMID: 30650514 PMCID: PMC6356496 DOI: 10.3390/toxins11010042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 01/07/2019] [Accepted: 01/08/2019] [Indexed: 12/31/2022] Open
Abstract
Climacostol (5-[(2Z)-non-2-en-1-yl]benzene-1,3-diol) is a resorcinol produced by the protozoan Climacostomum virens for defence against predators. It exerts a potent antimicrobial activity against bacterial and fungal pathogens, inhibits the growth of several human and rodent tumour cells, and is now available by chemical synthesis. In this study, we chemically synthesized two novel analogues of climacostol, namely, 2-methyl-5 [(2Z)-non-2-en-1-yl]benzene-1,3-diol (AN1) and 5-[(2Z)-non-2-en-1-yl]benzene-1,2,3-triol (AN2), with the aim to increase the activity of the native toxin, evaluating their effects on prokaryotic and free-living protists and on mammalian tumour cells. The results demonstrated that the analogue bearing a methyl group (AN1) in the aromatic ring exhibited appreciably higher toxicity against pathogen microbes and protists than climacostol. On the other hand, the analogue bearing an additional hydroxyl group (AN2) in the aromatic ring revealed its ability to induce programmed cell death in protistan cells. Overall, the data collected demonstrate that the introduction of a methyl or a hydroxyl moiety to the aromatic ring of climacostol can effectively modulate its potency and its mechanism of action.
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Affiliation(s)
- Federico Buonanno
- Laboratory of Protistology and Biology Education, Department of Education, Cultural Heritage, and Tourism (ECHT), Università degli Studi di Macerata, 62100 Macerata, Italy.
| | - Elisabetta Catalani
- Department for Innovation in Biological, Agro-food and Forest systems (DIBAF), Università degli Studi della Tuscia, 01100 Viterbo, Italy.
| | - Davide Cervia
- Department for Innovation in Biological, Agro-food and Forest systems (DIBAF), Università degli Studi della Tuscia, 01100 Viterbo, Italy.
| | - Francesca Proietti Serafini
- Department for Innovation in Biological, Agro-food and Forest systems (DIBAF), Università degli Studi della Tuscia, 01100 Viterbo, Italy.
| | - Simona Picchietti
- Department for Innovation in Biological, Agro-food and Forest systems (DIBAF), Università degli Studi della Tuscia, 01100 Viterbo, Italy.
| | - Anna Maria Fausto
- Department for Innovation in Biological, Agro-food and Forest systems (DIBAF), Università degli Studi della Tuscia, 01100 Viterbo, Italy.
| | - Simone Giorgi
- School of Sciences and Technologies, Section of Chemistry, Università degli Studi di Camerino, 62032 Camerino, Italy.
| | - Gabriele Lupidi
- School of Sciences and Technologies, Section of Chemistry, Università degli Studi di Camerino, 62032 Camerino, Italy.
| | - Federico Vittorio Rossi
- School of Sciences and Technologies, Section of Chemistry, Università degli Studi di Camerino, 62032 Camerino, Italy.
| | - Enrico Marcantoni
- School of Sciences and Technologies, Section of Chemistry, Università degli Studi di Camerino, 62032 Camerino, Italy.
| | - Dezemona Petrelli
- School of Biosciences and Veterinary Medicine, Università degli Studi di Camerino, 62032 Camerino, Italy.
| | - Claudio Ortenzi
- Laboratory of Protistology and Biology Education, Department of Education, Cultural Heritage, and Tourism (ECHT), Università degli Studi di Macerata, 62100 Macerata, Italy.
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Buonanno F, Anesi A, Giuseppe GD, Guella G, Ortenzi C. Chemical Defense by Erythrolactones in the Euryhaline Ciliated Protist, Pseudokeronopsis erythrina. Zoolog Sci 2017; 34:42-51. [PMID: 28148211 DOI: 10.2108/zs160123] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Pseudokeronopsis erythrina produces three new secondary metabolites, erythrolactones A2, B2 and C2, and their respective sulfate esters (A1, B1, C1), the structures of which have been recently elucidated on the basis of NMR spectroscopic data coupled to high resolution mass measurements (HR-MALDI-TOF). An analysis of the discharge of the protozoan pigment granules revealed that the non-sulfonated erythrolactones are exclusively stored in these cortical organelles, which are commonly used by a number of ciliates as chemical weapons in offense/defense interactions with prey and predators. We evaluated the toxic activity of pigment granule discharge on a panel of free-living ciliates and micro-invertebrates, and the activity of each single purified erythrolactone on three ciliate species. We also observed predator-prey interactions of P. erythrina with unicellular and multicellular predators. Experimental results confirm that only P. erythrina cells with discharged pigment granules were preferentially or exclusively hunted and eaten by at least some of its predators, whereas almost all intact (fully pigmented) cells remained alive. Our results indicate that erythrolactones are very effective as a chemical defense in P. erythrina.
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Affiliation(s)
- Federico Buonanno
- 1 Laboratory of Protistology and Biology Education, Department of ECHT, University of Macerata, Piazzale Bertelli, 1, 62100 Macerata, Italy
| | - Andrea Anesi
- 2 Bioorganic Chemistry Laboratory, Department of Physics, University of Trento, Via Sommarive 14, 38123 Povo (Trento), Italy
| | - Graziano Di Giuseppe
- 3 Department of Biology, University of Pisa, Via Alessandro Volta 4, 56126, Pisa, Italy
| | - Graziano Guella
- 2 Bioorganic Chemistry Laboratory, Department of Physics, University of Trento, Via Sommarive 14, 38123 Povo (Trento), Italy.,4 Biophysical Institute, CNR, Via alla Cascata 56/C, 38123 Povo (Trento), Italy
| | - Claudio Ortenzi
- 1 Laboratory of Protistology and Biology Education, Department of ECHT, University of Macerata, Piazzale Bertelli, 1, 62100 Macerata, Italy
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Catalani E, Proietti Serafini F, Zecchini S, Picchietti S, Fausto AM, Marcantoni E, Buonanno F, Ortenzi C, Perrotta C, Cervia D. Natural products from aquatic eukaryotic microorganisms for cancer therapy: Perspectives on anti-tumour properties of ciliate bioactive molecules. Pharmacol Res 2016; 113:409-420. [PMID: 27650755 DOI: 10.1016/j.phrs.2016.09.018] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 09/12/2016] [Accepted: 09/16/2016] [Indexed: 11/27/2022]
Abstract
Several modern drugs, including those for cancer therapy, have been isolated from natural sources, are based on natural products and its derivatives, or mime natural products. Some of them are in clinical use, others in clinical trials. The success of natural products in drug discovery is related to their biochemical characteristics and to the technologic methods used to study their feature. Natural compounds may acts as chemo-preventive agents and as factors that increase therapeutic efficacy of existing drugs, thus overcoming cancer cell drug resistance that is the main factor determining the failure in conventional chemotherapy. Water environment, because of its physical and chemical conditions, shows an extraordinary collection of natural biological substances with an extensive structural and functional diversity. The isolation of bioactive molecules has been reported from a great variety of aquatic organisms; however, the therapeutic application of molecules from eukaryotic microorganisms remains inadequately investigated and underexploited on a systematic basis. Herein we describe the biological activities in mammalian cells of selected substances isolated from ciliates, free-living protozoa common almost everywhere there is water, focusing on their anti-tumour actions and their possible therapeutic activity. In particular, we unveil the cellular and molecular machine mediating the effects of cell type-specific signalling protein pheromone Er-1 and secondary metabolites, i.e. euplotin C and climacostol, in cancer cells. To support the feasibility of climacostol-based approaches, we also present novel findings and report additional mechanisms of action using both in vitro and in vivo models of mouse melanomas, with the scope of highlighting new frontiers that can be explored also in a therapeutic perspective. The high skeletal chemical difference of ciliate compounds, their sustainability and availability, also through the use of new organic synthesis/modifications processes, and the results obtained so far in biological studies provide a rationale to consider some of them a potential resource for the design of new anti-cancer drugs.
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Affiliation(s)
- Elisabetta Catalani
- Department for Innovation in Biological, Agro-food and Forest systems (DIBAF), Università degli Studi della Tuscia, Viterbo, Italy
| | - Francesca Proietti Serafini
- Department for Innovation in Biological, Agro-food and Forest systems (DIBAF), Università degli Studi della Tuscia, Viterbo, Italy
| | - Silvia Zecchini
- Unit of Clinical Pharmacology, University Hospital "Luigi Sacco"-ASST Fatebenefratelli Sacco, Milano, Italy
| | - Simona Picchietti
- Department for Innovation in Biological, Agro-food and Forest systems (DIBAF), Università degli Studi della Tuscia, Viterbo, Italy
| | - Anna Maria Fausto
- Department for Innovation in Biological, Agro-food and Forest systems (DIBAF), Università degli Studi della Tuscia, Viterbo, Italy
| | - Enrico Marcantoni
- School of Sciences and Technologies, Section of Chemistry, Università degli Studi di Camerino, Italy
| | - Federico Buonanno
- Laboratory of Protistology and Biology Education, Department of Education, Cultural Heritage and Tourism, Università degli Studi di Macerata, Italy
| | - Claudio Ortenzi
- Laboratory of Protistology and Biology Education, Department of Education, Cultural Heritage and Tourism, Università degli Studi di Macerata, Italy
| | - Cristiana Perrotta
- Department of Biomedical and Clinical Sciences "Luigi Sacco" (DIBIC), Università degli Studi di Milano, Italy.
| | - Davide Cervia
- Department for Innovation in Biological, Agro-food and Forest systems (DIBAF), Università degli Studi della Tuscia, Viterbo, Italy; Department of Biomedical and Clinical Sciences "Luigi Sacco" (DIBIC), Università degli Studi di Milano, Italy.
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Climacostol reduces tumour progression in a mouse model of melanoma via the p53-dependent intrinsic apoptotic programme. Sci Rep 2016; 6:27281. [PMID: 27271364 PMCID: PMC4895139 DOI: 10.1038/srep27281] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 05/17/2016] [Indexed: 12/12/2022] Open
Abstract
Climacostol, a compound produced by the ciliated protozoan Climacostomum virens, displayed cytotoxic properties in vitro. This study demonstrates that it has anti-tumour potential. Climacostol caused a reduction of viability/proliferation of B16-F10 mouse melanoma cells, a rapidly occurring DNA damage, and induced the intrinsic apoptotic pathway characterised by the dissipation of the mitochondrial membrane potential, the translocation of Bax to the mitochondria, the release of Cytochrome c from the mitochondria, and the activation of Caspase 9-dependent cleavage of Caspase 3. The apoptotic mechanism of climacostol was found to rely on the up-regulation of p53 and its targets Noxa and Puma. In vivo analysis of B16-F10 allografts revealed a persistent inhibition of tumour growth rate when melanomas were treated with intra-tumoural injections of climacostol. In addition, it significantly improved the survival of transplanted mice, decreased tumour weight, induced a remarkable reduction of viable cells inside the tumour, activated apoptosis and up-regulated the p53 signalling network. Importantly, climacostol toxicity was more selective against tumour than non-tumour cells. The anti-tumour properties of climacostol and the molecular events associated with its action indicate that it is a powerful agent that may be considered for the design of pro-apoptotic drugs for melanoma therapy.
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Anesi A, Buonanno F, di Giuseppe G, Ortenzi C, Guella G. Metabolites from the Euryhaline CiliatePseudokeronopsis erythrina. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501424] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Sera Y, Masaki ME, Doe M, Buonanno F, Miyake A, Usuki Y, Iio H. Spirostomin, Defense Toxin of the Ciliate Spirostomum teres: Isolation, Structure Elucidation, and Synthesis. CHEM LETT 2015. [DOI: 10.1246/cl.150044] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yoshihiko Sera
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University
| | - Miyuki Eiraku Masaki
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University
| | - Matsumi Doe
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University
| | - Federico Buonanno
- Department of Molecular Cellular and Animal Biology, University of Camerino
- Department of Education Science, University of Macerata
| | - Akio Miyake
- Department of Molecular Cellular and Animal Biology, University of Camerino
| | - Yoshinosuke Usuki
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University
| | - Hideo Iio
- Division of Molecular Materials Science, Graduate School of Science, Osaka City University
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Cluster dynamics in Maristentor dinoferus, a gregarious benthic ciliate with zooxanthellae and a hypericin-like pigment, in relation to biofilm grazing by the fish Ctenochaetus striatus. Symbiosis 2014. [DOI: 10.1007/s13199-014-0295-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Buonanno F, Anesi A, Guella G, Kumar S, Bharti D, La Terza A, Quassinti L, Bramucci M, Ortenzi C. Chemical Offense by Means of Toxicysts in the Freshwater Ciliate, Coleps hirtus. J Eukaryot Microbiol 2014; 61:293-304. [DOI: 10.1111/jeu.12106] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 01/02/2014] [Accepted: 01/02/2014] [Indexed: 11/30/2022]
Affiliation(s)
- Federico Buonanno
- Laboratory of Protistology and Biology Education; University of Macerata; P.le Bertelli 1 62100 Macerata Italy
| | - Andrea Anesi
- Department of Physics; Bioorganic Chemistry Laboratory; University of Trento; 38123 Povo Trento Italy
| | - Graziano Guella
- Department of Physics; Bioorganic Chemistry Laboratory; University of Trento; 38123 Povo Trento Italy
| | - Santosh Kumar
- School of Environmental Sciences; Section of Animal and Molecular Ecology; University of Camerino; Via Gentile III da Varano 62032 Camerino (MC) Italy
- Ciliate Biology Laboratory; Sri Guru Tegh Bahadur Khalsa College; University of Delhi; Delhi 110007 India
| | - Daizy Bharti
- School of Environmental Sciences; Section of Animal and Molecular Ecology; University of Camerino; Via Gentile III da Varano 62032 Camerino (MC) Italy
- Ciliate Biology Laboratory; Sri Guru Tegh Bahadur Khalsa College; University of Delhi; Delhi 110007 India
| | - Antonietta La Terza
- School of Environmental Sciences; Section of Animal and Molecular Ecology; University of Camerino; Via Gentile III da Varano 62032 Camerino (MC) Italy
| | - Luana Quassinti
- Section of Physiology; School of Pharmacy; University of Camerino; Via Gentile III da Varano 62032 Camerino (MC) Italy
| | - Massimo Bramucci
- Section of Physiology; School of Pharmacy; University of Camerino; Via Gentile III da Varano 62032 Camerino (MC) Italy
| | - Claudio Ortenzi
- Laboratory of Protistology and Biology Education; University of Macerata; P.le Bertelli 1 62100 Macerata Italy
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DNA binding and oxidative DNA damage induced by climacostol-copper(II) complexes: implications for anticancer properties. Chem Biol Interact 2013; 206:109-16. [PMID: 23994247 DOI: 10.1016/j.cbi.2013.08.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 08/04/2013] [Accepted: 08/16/2013] [Indexed: 01/21/2023]
Abstract
Climacostol is a natural toxin isolated from the freshwater ciliated protozoan Climacostomum virens and belongs to the group of resorcinolic lipids. Climacostol exerts a potent antimicrobial activity against a panel of bacterial and fungal pathogens. In addition it inhibits the growth of tumor cell lines in a dose-dependent manner by inducing programmed cell death via intrinsic pathway. In this work, we investigated the possibility that climacostol exerts a prooxidant effect, inducing plasmid DNA strand breakage and eukaryotic DNA damage in presence of Cu(II) ions. Inhibition of DNA breakage using SOD, catalase and neocuproine confirmed the involvement of reactive oxygen species and Cu(I) ions in the DNA damage. UV-visible absorption changes and mass spectrometric analysis identified a product of reaction as a deprotonated form of climacostol. Study of the interaction with DNA, using fluorescence spectroscopic techniques, showed that climacostol binds with DNA. Given the structure-activity relationship of this compound and the mechanism of its prooxidant effect, we propose that the Cu(II)-mediated oxidative DNA damage by climacostol could explain its antimicrobial and antiproliferative activity.
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Buonanno F, Harumoto T, Ortenzi C. The Defensive Function of Trichocysts inParamecium tetraureliaAgainst Metazoan Predators Compared with the Chemical Defense of Two Species of Toxin-containing Ciliates. Zoolog Sci 2013; 30:255-61. [DOI: 10.2108/zsj.30.255] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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15
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The changes in the predatory behavior of the microturbellarian Stenostomum sphagnetorum on two species of toxin-secreting ciliates of the genus Spirostomum. Biologia (Bratisl) 2011. [DOI: 10.2478/s11756-011-0061-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Abstract
AbstractClimacostol is a resorcinol derivative that is produced by the ciliate Climacostomum virens. Exposure to purified climacostol results in lethal damage to the predatory ciliate Dileptus margaritifer and several other ciliates. To elucidate the mechanism of climacostol toxic action, we have investigated the effects of this compound on the swimming behavior of Tetrahymena thermophila and the respiratory system of isolated rat liver mitochondria. When added to living T. thermophila cells, climacostol markedly increased the turning frequency that was accompanied by a decrease in swimming velocity and subsequently by cell death. Observations by DIC and fluorescence microscopy showed morphological alterations in climacostol treated T. thermophila, indicating that climacostol might exert cytotoxic action on this organism. In the experiment with isolated rat liver mitochondria, climacostol was found to inhibit the NAD-linked respiration, but had no apparent effect on succinate-linked respiration. This finding indicates that climacostol specifically inhibits respiratory chain complex I in mitochondria. The combination of results suggest that the inhibition of mitochondrial respiration may be the cytotoxic mechanism of climacostol’s defenses against predatory protozoa.
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