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Fiore D, Piscopo C, Proto MC, Vasaturo M, Dal Piaz F, Fusco BM, Pagano C, Laezza C, Bifulco M, Gazzerro P. N6-Isopentenyladenosine Inhibits Colorectal Cancer and Improves Sensitivity to 5-Fluorouracil-Targeting FBXW7 Tumor Suppressor. Cancers (Basel) 2019; 11:cancers11101456. [PMID: 31569395 PMCID: PMC6826543 DOI: 10.3390/cancers11101456] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 09/20/2019] [Accepted: 09/25/2019] [Indexed: 12/19/2022] Open
Abstract
N6-isopentenyladenosine has been shown to exert potent in vitro antitumor activity on different human cancers, including colorectal cancer. Although some potential biochemical targets have been identified, its precise mechanism of action remains unclear. We found that N6-isopentenyladenosine affects colorectal cancer proliferation in in vitro models carrying different mutational status of FBXW7 and TP53 genes, and in HCT116 xenografts in SCID mice, by increasing the expression of the well-established tumor suppressor FBXW7, a component of the SCF-E3 ubiquitin ligase complex that promotes degradation of various oncoproteins and transcription factors, such as c-Myc, SREBP and Mcl1. Corroborating our previous studies, we identified for the first time the FBXW7/SREBP/FDPS axis as a target of the compound. Pull down of ubiquitinated proteins, immunoprecipitation and luciferase assays, reveal that through the increase of FBXW7/c-Myc binding, N6-isopentenyladenosine induces the ubiquitination of c-Myc, inhibiting its transcriptional activity. Moreover, in FBXW7- and TP53-wild type cells, N6-isopentenyladenosine strongly synergizes with 5-Fluorouracil to inhibit colon cancer growth in vitro. Our results provide novel insights into the molecular mechanism of N6-isopentenyladenosine, revealing its multi-targeting antitumor action, in vitro and in vivo. Restoring of FBXW7 tumor-suppressor represents a valid therapeutic tool, enabling N6-isopentenyladenosine as optimizable compound for patient-personalized therapies in colorectal cancer.
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Affiliation(s)
- Donatella Fiore
- Department of Pharmacy, University of Salerno, 84084 Fisciano (SA), Italy.
| | - Chiara Piscopo
- Department of Pharmacy, University of Salerno, 84084 Fisciano (SA), Italy.
- PhD Program in Drug Discovery and Development, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano (SA), Italy.
| | - Maria Chiara Proto
- Department of Pharmacy, University of Salerno, 84084 Fisciano (SA), Italy.
| | - Michele Vasaturo
- Department of Pharmacy, University of Salerno, 84084 Fisciano (SA), Italy.
| | - Fabrizio Dal Piaz
- Department of Medicine, Surgery and Dentistry, University of Salerno, 84081 Baronissi (Salerno), Italy.
| | | | - Cristina Pagano
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples "Federico II", 80131 Naples, Italy.
| | - Chiara Laezza
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples "Federico II", 80131 Naples, Italy.
- Institute of Endocrinology and Experimental Oncology "Gaetano Salvatore" (IEOS), National Research Council (CNR), 80131 Naples, Italy.
| | - Maurizio Bifulco
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples "Federico II", 80131 Naples, Italy.
| | - Patrizia Gazzerro
- Department of Pharmacy, University of Salerno, 84084 Fisciano (SA), Italy.
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Vasaturo M, Cotugno R, Fiengo L, Vinegoni C, Dal Piaz F, De Tommasi N. The anti-tumor diterpene oridonin is a direct inhibitor of Nucleolin in cancer cells. Sci Rep 2018; 8:16735. [PMID: 30425290 PMCID: PMC6233161 DOI: 10.1038/s41598-018-35088-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 10/25/2018] [Indexed: 11/15/2022] Open
Abstract
The bioactive plant diterpene oridonin displays important pharmacological activities and is widely used in traditional Chinese medicine; however, its molecular mechanism of action is still incompletely described. In vitro and in vivo data have demonstrated anti-tumor activity of oridonin and its ability to interfere with several cell pathways; however, presently only the molecular chaperone HSP70 has been identified as a direct potential target of this compound. Here, using a combination of different proteomic approaches, innovative Cellular Thermal Shift Assay (CETSA) experiments, and classical biochemical methods, we demonstrate that oridonin interacts with Nucleolin, effectively modulating the activity of this multifunctional protein. The ability of oridonin to target Nucleolin and/or HSP70 could account for the bioactivity profile of this plant diterpene. Recently, Nucleolin has attracted attention as a druggable target, as its diverse functions are implicated in pathological processes such as cancer, inflammation, and viral infection. However, up to now, no small molecule as Nucleolin binders has been reported, thus our finding represents the first evidence of Nucleolin modulation by a small inhibitor.
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Affiliation(s)
- Michele Vasaturo
- Università degli Studi di Salerno, Department of Pharmacy, Via Giovanni Paolo II, 84084, Fisciano, (SA), Italy
- Università degli Studi di Salerno, Ph. D. School of Pharmacy, Via Giovanni Paolo II, 84084, Fisciano, (SA), Italy
| | - Roberta Cotugno
- Università degli Studi di Salerno, Department of Pharmacy, Via Giovanni Paolo II, 84084, Fisciano, (SA), Italy
| | - Lorenzo Fiengo
- Università degli Studi di Salerno, Department of Pharmacy, Via Giovanni Paolo II, 84084, Fisciano, (SA), Italy
- Università degli Studi di Salerno, Ph. D. School of Pharmacy, Via Giovanni Paolo II, 84084, Fisciano, (SA), Italy
| | - Claudio Vinegoni
- Harvard Medical School, MGH Center for Systems Biology, 185 Cambridge Steet, 02144, Boston, MA, USA
| | - Fabrizio Dal Piaz
- Università degli Studi di Salerno, Department of Medicine and Surgery, Via S. Allende, 84081, Baronissi, (SA), Italy.
| | - Nunziatina De Tommasi
- Università degli Studi di Salerno, Department of Pharmacy, Via Giovanni Paolo II, 84084, Fisciano, (SA), Italy
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Del Gaudio F, Festa C, Mozzicafreddo M, Vasaturo M, Casapullo A, De Marino S, Riccio R, Monti MC. Biomolecular proteomics discloses ATP synthase as the main target of the natural glycoside deglucoruscin. Mol Biosyst 2016; 12:3132-8. [PMID: 27476482 DOI: 10.1039/c6mb00460a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Extracts of Ruscus aculeatus are a rich source of bioactive steroidal glycosides, such as ruscogenins which are reported to act against chronic venous disorders. Nowadays, several preparations of its roots, commonly used in traditional medicine, are on the market as food supplements for health care and maintenance. Although spirostanol deglucoruscin is one of the main metabolites in these extracts, literature reports about its pharmacological profile are scarce. In this paper, a multi-disciplinary approach, based on chemical proteomics, molecular modelling and bio-organic assays, has been used to disclose the whole interactome of deglucoruscin and the F0-F1 ATP synthase complex has been found as its main target.
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Affiliation(s)
- Federica Del Gaudio
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II, 132, 84084, Fisciano, Italy.
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Chini MG, Malafronte N, Vaccaro MC, Gualtieri MJ, Vassallo A, Vasaturo M, Castellano S, Milite C, Leone A, Bifulco G, De Tommasi N, Dal Piaz F. Identification of Limonol Derivatives as Heat Shock Protein 90 (Hsp90) Inhibitors through a Multidisciplinary Approach. Chemistry 2016; 22:13236-50. [DOI: 10.1002/chem.201602242] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Indexed: 01/23/2023]
Affiliation(s)
- Maria G. Chini
- Department of Pharmacy; University of Salerno; Via Giovanni Paolo II 132 84084 Fisciano Italy
| | - Nicola Malafronte
- Department of Pharmacy; University of Salerno; Via Giovanni Paolo II 132 84084 Fisciano Italy
| | - Maria C. Vaccaro
- Department of Pharmacy; University of Salerno; Via Giovanni Paolo II 132 84084 Fisciano Italy
| | - Maria J. Gualtieri
- Department of Pharmacy; University of Salerno; Via Giovanni Paolo II 132 84084 Fisciano Italy
- Department of Pharmacognosy and Organic Drug; University of Los Andes; Sector Campo de Oro, detrás del IAHULA 5101 Mérida Venezuela
| | - Antonio Vassallo
- Department of Science; University of Basilicata; Viale dell'Ateneo Lucano 10 85100 Potenza Italy
| | - Michele Vasaturo
- Department of Pharmacy; University of Salerno; Via Giovanni Paolo II 132 84084 Fisciano Italy
- PhD Program in Drug Discovery and Development; University of Salerno; Via Giovanni Paolo II 132 84084 Fisciano Italy
| | - Sabrina Castellano
- Department of Pharmacy; University of Salerno; Via Giovanni Paolo II 132 84084 Fisciano Italy
- Department of Medicine and Surgery; University of Salerno; Via Allende 84081 Baronissi Italy
| | - Ciro Milite
- Department of Pharmacy; University of Salerno; Via Giovanni Paolo II 132 84084 Fisciano Italy
| | - Antonietta Leone
- Department of Pharmacy; University of Salerno; Via Giovanni Paolo II 132 84084 Fisciano Italy
| | - Giuseppe Bifulco
- Department of Pharmacy; University of Salerno; Via Giovanni Paolo II 132 84084 Fisciano Italy
| | - Nunziatina De Tommasi
- Department of Pharmacy; University of Salerno; Via Giovanni Paolo II 132 84084 Fisciano Italy
| | - Fabrizio Dal Piaz
- Department of Pharmacy; University of Salerno; Via Giovanni Paolo II 132 84084 Fisciano Italy
- Department of Medicine and Surgery; University of Salerno; Via Allende 84081 Baronissi Italy
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Dal Piaz F, Ferro P, Vassallo A, Vasaturo M, Forte G, Chini MG, Bifulco G, Tosco A, De Tommasi N. Identification and mechanism of action analysis of the new PARP-1 inhibitor 2″-hydroxygenkwanol A. Biochim Biophys Acta Gen Subj 2015; 1850:1806-14. [PMID: 25999161 DOI: 10.1016/j.bbagen.2015.05.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 04/27/2015] [Accepted: 05/12/2015] [Indexed: 12/27/2022]
Abstract
BACKGROUND Poly(ADP-ribose) polymerase 1 (PARP-1) activity has been implicated in the pathogenesis of numerous diseases as cancer, inflammation, diabetes and neurodegenerative disorders, therefore the research for new PARP-1 inhibitors is still an active area. METHODS To identify new potential PARP-1 inhibitors, we performed a screening of a small-molecule library consisting of polyphenols isolated from plants used in the traditional medicine, by Surface Plasmon Resonance (SPR). Biochemical and cellular assays were performed to confirm SPR results and select the promising candidate(s). Finally, limited proteolysis and ligand docking analyses allowed defining the protein region involved in the interaction with the putative inhibitor(s). RESULTS The dimeric spiro-flavonoid 2″-hydroxygenkwanol A, member of a relatively recently discovered class of flavonoids containing a spirane C-atom, has been identified as possible PARP-1 inhibitor. This compound showed a high affinity for the polymerase (KD: 0.32±0.05μM); moreover PARP-1 activity in the presence of 2″-hydroxygenkwanol A was significantly affected both when using the recombinant protein and when measuring the cellular effects. Finally, our study suggests this compound to efficiently interact with the protein catalytic domain, into the nicotine binding pocket. CONCLUSION 2″-hydroxygenkwanol A efficiently binds and inhibits PARP-1 at submicromolar concentrations, thus representing a promising lead for the design of a new class of PARP-1 modulators, useful as therapeutic agents and/or biochemical tools. GENERAL SIGNIFICANCE Our study has identified an additional class of plant molecules, the spiro-biflavonoids, with known beneficial pharmacological properties but with an unknown mechanism of action, as a possible novel class of PARP-1 activity inhibitors.
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Affiliation(s)
- Fabrizio Dal Piaz
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy.
| | - Piera Ferro
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Antonio Vassallo
- Department of Sciences, University of Basilicata, Via Nazario Sauro 85, 85100 Potenza, SA, Italy
| | - Michele Vasaturo
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Giovanni Forte
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Maria Giovanna Chini
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Giuseppe Bifulco
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
| | - Alessandra Tosco
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy.
| | - Nunziatina De Tommasi
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy
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Belvedere R, Bizzarro V, Popolo A, Dal Piaz F, Vasaturo M, Picardi P, Parente L, Petrella A. Role of intracellular and extracellular annexin A1 in migration and invasion of human pancreatic carcinoma cells. BMC Cancer 2014; 14:961. [PMID: 25510623 PMCID: PMC4301448 DOI: 10.1186/1471-2407-14-961] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 12/11/2014] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Annexin A1 (ANXA1), a 37 kDa multifunctional protein, is over-expressed in tissues from patients of pancreatic carcinoma (PC) where the protein seems to be associated with malignant transformation and poor prognosis. METHODS The expression and localization of ANXA1 in MIA PaCa-2, PANC-1, BxPC-3 and CAPAN-2 cells were detected by Western Blotting and Immunofluorescence assay. Expression and activation of Formyl Peptide Receptors (FPRs) were shown through flow cytometry/PCR and FURA assay, respectively. To investigate the role of ANXA1 in PC cell migration and invasion, we performed in vitro wound-healing and matrigel invasion assays. RESULTS In all the analyzed PC cell lines, a huge expression and a variable localization of ANXA1 in sub-cellular compartments were observed. We confirmed the less aggressive phenotype of BxPC-3 and CAPAN-2 compared with PANC-1 and MIA PaCa-2 cells, through the evaluation of Epithelial-Mesenchymal Transition (EMT) markers. Then, we tested MIA PaCa-2 and PANC-1 cell migration and invasiveness rate which was inhibited by specific ANXA1 siRNAs. Both the cell lines expressed FPR-1 and -2. Ac2-26, an ANXA1 mimetic peptide, induced intracellular calcium release, consistent with FPR activation, and significantly increased cell migration/invasion rate. Interestingly, in MIA PaCa-2 cells we found a cleaved form of ANXA1 (33 kDa) that localizes at cellular membranes and is secreted outside the cells, as confirmed by MS analysis. The importance of the secreted form of ANXA1 in cellular motility was confirmed by the administration of ANXA1 blocking antibody that inhibited migration and invasion rate in MIA PaCa-2 but not in PANC-1 cells that lack the 33 kDa ANXA1 form and show a lower degree of invasiveness. Finally, the treatment of PANC-1 cells with MIA PaCa-2 supernatants significantly increased the migration rate of these cells. CONCLUSION This study provides new insights on the role of ANXA1 protein in PC progression. Our findings suggest that ANXA1 protein could regulate metastasis by favouring cell migration/invasion intracellularly, as cytoskeleton remodelling factor, and extracellularly like FPR ligand.
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Affiliation(s)
- Raffaella Belvedere
- Department of Pharmacy, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA Italy
| | - Valentina Bizzarro
- Department of Pharmacy, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA Italy
| | - Ada Popolo
- Department of Pharmacy, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA Italy
| | - Fabrizio Dal Piaz
- Department of Pharmacy, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA Italy
| | - Michele Vasaturo
- Department of Pharmacy, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA Italy
| | - Paola Picardi
- Department of Pharmacy, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA Italy
| | - Luca Parente
- Department of Pharmacy, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA Italy
| | - Antonello Petrella
- Department of Pharmacy, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA Italy
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Gualtieri MJ, Malafronte N, Vassallo A, Braca A, Cotugno R, Vasaturo M, De Tommasi N, Dal Piaz F. Bioactive limonoids from the leaves of Azaridachta indica (Neem). J Nat Prod 2014; 77:596-602. [PMID: 24499352 DOI: 10.1021/np400863d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Eight new limonoids (1-8) and one new phenol glycoside (9), along with six known compounds, were isolated from the leaves of Azaridachta indica. The structures of 1-9 were elucidated on the basis of spectroscopic data analysis. Compounds isolated were assayed for their cytotoxicity against different cancer cell lines. Moreover, their ability to interact with the molecular chaperone Hsp90, affecting its biological activity, was tested.
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Affiliation(s)
- Maria J Gualtieri
- Laboratorio de Medicamentos Organicos Sector Campo de Oro, Departamento de Farmacognosia y Medicamentos Organicos, Universidad de Los Andes , detras del HULA, Mérida, 5101, Venezuela
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