1
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Barretta P, Scoditti S, Belletto D, Ponte F, Vigna V, Mazzone G, Sicilia E. Ruthenium complexes bearing nile red chromophore and one of its derivative: Theoretical evaluation of PDT-related properties. J Comput Chem 2024. [PMID: 38733370 DOI: 10.1002/jcc.27392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 03/25/2024] [Accepted: 04/24/2024] [Indexed: 05/13/2024]
Abstract
The outcomes of DFT-based calculations are here reported to assess the applicability of two synthesized polypyridyl Ru(II) complexes, bearing ethynyl nile red (NR) on a bpy ligand, and two analogues, bearing modified-NR, in photodynamic therapy. The absorption spectra, together with the non-radiative rate constants for the S1 - Tn intersystem crossing transitions, have been computed for this purpose. Calculations evidence that the structural modification on the chromophore destabilizes the HOMO of the complexes thus reducing the H-L gap and, consequently, red shifting the maximum absorption wavelength within the therapeutic window, up to 620 nm. Moreover, the favored ISC process from the bright state involves the triplet state closest in energy, which is also characterized by the highest SOC value and by the involvement of the whole bpy ligand bearing the chromophore in delocalising the unpaired electrons. These outcomes show that the photophysical behavior of the complexes is dominated by the chromophore.
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Affiliation(s)
- Pierraffaele Barretta
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende (CS), Italy
| | - Stefano Scoditti
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende (CS), Italy
| | - Daniele Belletto
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende (CS), Italy
| | - Fortuna Ponte
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende (CS), Italy
| | - Vincenzo Vigna
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende (CS), Italy
| | - Gloria Mazzone
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende (CS), Italy
| | - Emilia Sicilia
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende (CS), Italy
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2
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Dabbish E, Scoditti S, Shehata MNI, Ritacco I, Ibrahim MAA, Shoeib T, Sicilia E. Insights on cyclophosphamide metabolism and anticancer mechanism of action: A computational study. J Comput Chem 2024; 45:663-670. [PMID: 38088485 DOI: 10.1002/jcc.27280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 11/23/2023] [Accepted: 11/27/2023] [Indexed: 03/02/2024]
Abstract
The oxazaphosphorine cyclophosphamide (CP) is a DNA-alkylating agent commonly used in cancer chemotherapy. This anticancer agent is administered as a prodrug activated by a liver cytochrome P450-catalyzed 4-hydroxylation reaction that yields the active, cytotoxic metabolite. The primary metabolite, 4-hydroxycyclophosphamide, equilibrates with the ring-open aldophosphamide that undergoes β-elimination to yield the therapeutically active DNA cross-linking phosphoramide mustard and the byproduct acrolein. The present paper presents a DFT investigation of the different metabolic phases and an insight into the mechanism by which CP exerts its cytotoxic action. A detailed computational analysis of the energy profiles describing all the involved transformations and the mechanism of DNA alkylation is given with the aim to contribute to an increase of knowledge that, after more than 60 years of unsuccessful attempts, can lead to the design and development of a new generation of oxazaphosphorines.
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Affiliation(s)
- Eslam Dabbish
- Department of Chemistry, The American University in Cairo, New Cairo, Egypt
| | - Stefano Scoditti
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Arcavacata, Italy
| | - Mohammed N I Shehata
- Computational Chemistry Laboratory, Chemistry Department, Faculty of Science, Minia University, Minia, Egypt
| | - Ida Ritacco
- Dipartimento di Chimica e Biologia, Università degli Studi di Salerno, Salerno, Italy
| | - Mahmoud A A Ibrahim
- Computational Chemistry Laboratory, Chemistry Department, Faculty of Science, Minia University, Minia, Egypt
- School of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Tamer Shoeib
- Department of Chemistry, The American University in Cairo, New Cairo, Egypt
| | - Emilia Sicilia
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Arcavacata, Italy
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3
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Belletto D, Ponte F, Sanna N, Scoditti S, Sicilia E. G-quadruplex DNA selective targeting for anticancer therapy: a computational study of a novel Pt II monofunctional complex activated by adaptive binding. Dalton Trans 2023; 52:13517-13527. [PMID: 37718620 DOI: 10.1039/d3dt02678g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/19/2023]
Abstract
Targeting of G-quadruplex (G-Q) nucleic acids, which are helical four-stranded structures formed from guanine-rich nucleic acid sequences, has emerged in recent years as an appealing opportunity for drug intervention in anticancer therapy. Small-molecule drugs can stabilize quadruplex structures, promoting selective downregulation of gene expression and telomerase inhibition and also activating DNA damage responses. Thus, rational design of small molecular ligands able to selectively interact with and stabilize G-Q structures is a promising strategy for developing potent anti-cancer drugs with selective toxicity towards cancer cells over normal ones. Here, the outcomes of a thorough computational investigation of a recently synthesized monofunctional PtII complex (Pt1), whose selectivity for G-Q is activated by what is called adaptive binding, are reported. Quantum mechanics and molecular dynamics calculations have been employed for studying the classical key steps of the mechanism of action of PtII complexes, the conversion of the non-charged and non-planar Pt1 complex into a planar and charged PtII (Pt2) complex able to play the role of a G-Q binder and, finally, the interaction of Pt2 with G-Q. The information obtained from such an investigation allows us to rationalize the behavior of the novel PtII complex proposed to be activated by adaptive binding toward selective interaction with G-Q or similar molecules and can be exploited for designing ligands with more effective recognition ability toward G-quadruplex DNA.
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Affiliation(s)
- Daniele Belletto
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, CS, Italy.
| | - Fortuna Ponte
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, CS, Italy.
| | - Nico Sanna
- Department for Innovation in Biology Agro-Food and Forest Systems (DIBAF), University of Tuscia, Largo dell'Università snc, 01100 Viterbo, Italy
| | - Stefano Scoditti
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, CS, Italy.
| | - Emilia Sicilia
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, CS, Italy.
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4
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Ponte F, Scoditti S, Mazzone G, Sicilia E. The current status in computational exploration of Pt(IV) prodrug activation by reduction. Phys Chem Chem Phys 2023. [PMID: 37259840 DOI: 10.1039/d3cp01150j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Octahedral PtIV complexes are considered highly promising candidates for overcoming some shortcomings of clinically approved PtII drugs. PtIV compounds, owing to their inertia, appear to be capable of resisting premature aquation and undesired binding to essential plasma proteins and have shown remarkable potential for both oral administration and for reducing side effects. Additionally, their pharmacological properties can be finely tuned by choosing appropriate axial ligands. The reduction inside the cell by biological reducing agents to the correponding active cytotoxic PtII species, accompanied by the loss of the axial ligands, is considered an essential step of their mechanism and has been extensively studied. However, a detailed understanding of the mechanism by which PtIV prodrugs are activated, which should be highly beneficial for their proper design, is lacking, and many contradictory results continue to be collected. In the hope of contributing to the advancement of knowledge in this field, this perspective focuses on the insights gained from computational studies carried out with the aim of finding answers to the many still open questions concerning the reduction of PtIV complexes in biological environments.
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Affiliation(s)
- Fortuna Ponte
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Via P.Bucci, 87036 Rende (CS), Italy.
| | - Stefano Scoditti
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Via P.Bucci, 87036 Rende (CS), Italy.
| | - Gloria Mazzone
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Via P.Bucci, 87036 Rende (CS), Italy.
| | - Emilia Sicilia
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Via P.Bucci, 87036 Rende (CS), Italy.
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5
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Ponte F, Scoditti S, Barretta P, Mazzone G. Computational Assessment of a Dual-Action Ru(II)-Based Complex: Photosensitizer in Photodynamic Therapy and Intercalating Agent for Inducing DNA Damage. Inorg Chem 2023. [PMID: 37248070 DOI: 10.1021/acs.inorgchem.3c00592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A combined quantum-mechanical and classical molecular dynamics study of a recent Ru(II) complex with potential dual anticancer action is reported here. The main basis for the multiple action relies on the merocyanine ligand, whose electronic structure allows the drug to be able to absorb within the therapeutic window and in turn efficiently generate 1O2 for photodynamic therapy application and to intercalate within two nucleobases couples establishing reversible electrostatic interactions with DNA. TDDFT outcomes, which include the absorption spectrum, triplet states energy, and spin-orbit matrix elements, evidence that the photosensitizing activity is ensured by an MLCT state at around 660 nm, involving the merocyanine-based ligand, and by an efficient ISC from such state to triplet states with different characters. On the other hand, the MD exploration of all the possible intercalation sites within the dodecamer B-DNA evidences the ability of the complex to establish several electrostatic interactions with the nucleobases, thus potentially inducing DNA damage, though the simulation of the absorption spectra for models extracted by each MD trajectory shows that the photosensitizing properties of the complex remain unaltered. The computational results support that the anti-tumor effect may be related to multiple mechanisms of action.
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Affiliation(s)
- Fortuna Ponte
- Department of Chemistry and Chemical Technologies, University of Calabria, 87036 Rende, Italy
| | - Stefano Scoditti
- Department of Chemistry and Chemical Technologies, University of Calabria, 87036 Rende, Italy
| | - Pierraffaele Barretta
- Department of Chemistry and Chemical Technologies, University of Calabria, 87036 Rende, Italy
| | - Gloria Mazzone
- Department of Chemistry and Chemical Technologies, University of Calabria, 87036 Rende, Italy
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Sánchez-Camacho J, Infante-Tadeo S, Carrasco AC, Scoditti S, Martínez Á, Barroso-Bujans F, Sicilia E, Pizarro AM, Salassa L. Flavin-Conjugated Pt(IV) Anticancer Agents. Inorg Chem 2023; 62:5644-5651. [PMID: 36990656 DOI: 10.1021/acs.inorgchem.3c00193] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
Abstract
In situ activation of Pt(IV) to Pt(II) species is a promising strategy to control the anticancer activity and overcome the off-target toxicity linked to classic platinum chemotherapeutic agents. Herein, we present the design and synthesis of two new asymmetric Pt(IV) derivatives of cisplatin and oxaliplatin (1·TARF and 2·TARF, respectively) bearing a covalently bonded 2',3',4',5'-tetraacetylriboflavin moiety (TARF). 1H and 195Pt NMR spectroscopy shows that 1·TARF and 2·TARF can be effectively activated into toxic Pt(II) species, when incubated with nicotinamide adenine dinucleotide, sodium ascorbate, and glutathione in the dark and under light irradiation. Density functional theory studies of the dark Pt(IV)-to-Pt(II) conversion of 2·TARF indicate that the process involves first hydride transfer from the donor to the flavin moiety of the complex, followed by electron transfer to the Pt(IV) center. When administered to MDA-MB-231 breast cancer cells preincubated with nontoxic amounts of ascorbate, 2·TARF displays enhanced toxicity (between 1 and 2 orders of magnitude), suggesting that the generation of oxaliplatin can selectively be triggered by redox activation. Such an effect is not observed when 2 and TARF are coadministered under the same conditions, demonstrating that covalent binding of the flavin to the Pt complex is pivotal.
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Affiliation(s)
- Juan Sánchez-Camacho
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
| | | | - Ana C Carrasco
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
| | - Stefano Scoditti
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende, Cosenza 87036, Italy
| | - Álvaro Martínez
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
| | - Fabienne Barroso-Bujans
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- Centro de Física de Materiales, CSIC-UPV/EHU, Paseo Manuel Lardizábal 5, Donostia 20018, Spain
- Ikerbasque, Basque Foundation for Science, Bilbao 48011, Spain
| | - Emilia Sicilia
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende, Cosenza 87036, Italy
| | - Ana M Pizarro
- IMDEA Nanociencia, Faraday 9, Madrid 28049, Spain
- Unidad Asociada de Nanobiotecnología CNB-CSIC-IMDEA, Madrid 28049, Spain
| | - Luca Salassa
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia 20018, Spain
- Ikerbasque, Basque Foundation for Science, Bilbao 48011, Spain
- Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia 20018, Spain
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7
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Yang X, Ma L, Shao H, Zhou Z, Ling X, Yao M, Luo G, Scoditti S, Sicilia E, Mazzone G, Gao M, Tang BZ. Riboflavin-Promoted In Situ Photoactivation of Dihydroalkaloid Prodrugs for Cancer Therapy. J Med Chem 2022; 65:15738-15748. [PMID: 36410876 DOI: 10.1021/acs.jmedchem.2c01262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Cancer therapies usually suffer from poor targeting ability and serious side effects. Photoactivatable cancer therapy has the significant advantage of a high spatiotemporal resolution, but most photoactivatable prodrugs require decoration with stoichiometric photocleavable groups, which are only responsive to ultraviolet irradiation and suffer from low reaction efficiency. To tackle these challenges, we herein propose a photoactivation strategy with biogenic riboflavin as the photosensitizer to promote the in situ transformation of noncytotoxic dihydroalkaloid prodrugs dihydrochelerythrine (DHCHE), dihydrosanguinarine (DHSAN), and dihydronitidine (DHNIT) into anticancer alkaloid drugs chelerythrine (CHE), sanguinarine (SAN), and nitidine (NIT), respectively, which can efficiently kill cancer cells and inhibit in vivo tumor growth. Meanwhile, the photoactivatable transformation can be in situ monitored by green-to-red fluorescence conversion, which will contribute to easy controlling of the therapeutic dose. The proposed photoactivatable transformation mechanism was also explored by density functional theory (DFT) calculations. We believe this riboflavin-promoted and imaging-guided photoactivation strategy is promising for precise cancer therapy.
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Affiliation(s)
- Xin Yang
- National Engineering Research Center for Tissue Restoration and Reconstruction, Key Laboratory of Biomedical Engineering of Guangdong Province, Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Limin Ma
- Department of Orthopedics, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, China
| | - Hongwei Shao
- Department of Orthopedics, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, China
| | - Zikai Zhou
- National Engineering Research Center for Tissue Restoration and Reconstruction, Key Laboratory of Biomedical Engineering of Guangdong Province, Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Xia Ling
- National Engineering Research Center for Tissue Restoration and Reconstruction, Key Laboratory of Biomedical Engineering of Guangdong Province, Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Mengyu Yao
- Department of Orthopedics, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, China
| | - Guowen Luo
- Department of Orthopedics, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, China
| | - Stefano Scoditti
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, Cosenza, Italy
| | - Emilia Sicilia
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, Cosenza, Italy
| | - Gloria Mazzone
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, Cosenza, Italy
| | - Meng Gao
- National Engineering Research Center for Tissue Restoration and Reconstruction, Key Laboratory of Biomedical Engineering of Guangdong Province, Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Ben Zhong Tang
- Shenzhen Institute of Aggregate Science and Technology, School of Science and Engineering, The Chinese University of Hong Kong, 2001 Longxiang Boulevard, Longgang, Shenzhen, Guangdong 518172, China
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8
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Barretta P, Ponte F, Scoditti S, Vigna V, Mazzone G, Sicilia E. Computational Analysis of the Behavior of BODIPY Decorated Monofunctional Platinum(II) Complexes in the Dark and under Light Irradiation. J Phys Chem A 2022; 126:7159-7167. [PMID: 36194386 PMCID: PMC9574924 DOI: 10.1021/acs.jpca.2c04544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Dual-action drugs are occupying an important place in the scientific landscape of cancer research owing to the possibility to combine different therapeutic strategies into a single molecule. In the present work, the behavior of two BODIPY-appended monofunctional Pt(II) complexes, one mononuclear and one binuclear, recently synthesized and tested for their cytotoxicity have been explored both in the dark and under light irradiation. Quantum mechanical DFT calculations have been used to carry out the exploration of the key steps, aquation and guanine attack, of the mechanism of action of Pt(II) complexes in the dark. Due to the presence of the BODIPY chromophore and the potential capability of the two investigated complexes to work as photosensitizers in PDT, time dependent DFT has been employed to calculate their photophysical properties and to inspect how the sensitizing properties of BODIPY are affected by the presence of the platinum "heavy atom". Furthermore, also the eventual influence on of the photophysical properties due to the displacement of chlorido ligands by water and of water by guanine has been taken into consideration.
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Affiliation(s)
- Pierraffaele Barretta
- Department of Chemistry and Chemical Technologies, University of Calabria, Ponte P. Bucci, 87036 Arcavacata di Rende (CS), Italy
| | - Fortuna Ponte
- Department of Chemistry and Chemical Technologies, University of Calabria, Ponte P. Bucci, 87036 Arcavacata di Rende (CS), Italy
| | - Stefano Scoditti
- Department of Chemistry and Chemical Technologies, University of Calabria, Ponte P. Bucci, 87036 Arcavacata di Rende (CS), Italy
| | - Vincenzo Vigna
- Department of Chemistry and Chemical Technologies, University of Calabria, Ponte P. Bucci, 87036 Arcavacata di Rende (CS), Italy
| | - Gloria Mazzone
- Department of Chemistry and Chemical Technologies, University of Calabria, Ponte P. Bucci, 87036 Arcavacata di Rende (CS), Italy
| | - Emilia Sicilia
- Department of Chemistry and Chemical Technologies, University of Calabria, Ponte P. Bucci, 87036 Arcavacata di Rende (CS), Italy
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9
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Abstract
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An in-depth computational study of the ability of a recently
proposed
multi-action Ru(II)–Pt(IV) conjugate to act as a photosensitizer
in photodynamic therapy (PDT) and chemotherapeutic drugs is presented
here. The investigated complex is characterized by a polypyridyl Ru(II)
chromophore linked to a Pt(IV) complex that, acting as a prodrug,
should be activated by reduction releasing the Ru-based chromophore
that can absorb light of proper wavelength to be used in PDT. The
reaction mechanism for active species formation has been fully elucidated
by means of density functional theory and its time-dependent extension.
The reduction mechanism, assisted by ascorbate, of the Pt(IV) prodrug
to the Pt(II) active species has been explored, taking into consideration
all the possible modes of attack of the reductant for releasing the
axial ligands and affording active cisplatin. Given the similarity
in the photophysical properties of the chromophore linked or not to
the Pt(IV) complex, both the Ru(II)–Pt(IV) conjugate precursor
and the Ru(II) chromophore should be able to act as PDT photosensitizers
according to type I and type II photoprocesses. In particular, they
are able to generate singlet oxygen cytotoxic species as well as auto-ionize
to form highly reactive O2–• species. A computational study on the ability
of a multi-action Ru(II)−Pt(IV)
conjugate to act as a photosensitizer in photodynamic therapy (PDT)
and chemotherapeutic drugs is presented here. The reduction mechanism
of the Pt(IV) complex along with the photophysical properties of both
the prodrug Ru(II)−Pt(IV) conjugate and Ru(II) complex is provided.
The mechanism of action has been fully elucidated by means of density
functional theory and its time-dependent extension.
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Affiliation(s)
- Stefano Scoditti
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Rende, CS, Italy
| | - Gloria Mazzone
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Rende, CS, Italy
| | - Nico Sanna
- Department for Innovation in Biology Agro-Food and Forest Systems (DIBAF), University of Tuscia, Largo dell'Università snc, 01100 Viterbo, Italy
| | - Emilia Sicilia
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Rende, CS, Italy
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10
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Mazzone G, Scoditti S, Caligiuri R, Ricciardi L, Sicilia E, Lupo MG, Rimoldi I, Godbert N, La Deda M, Ionescu A, Ghedini M, Aiello I, Facchetti G. Cytotoxicity of Alizarine versus Tetrabromocathecol Cyclometalated Pt(II) Theranostic Agents: A Combined Experimental and Computational Investigation. Inorg Chem 2022; 61:7188-7200. [PMID: 35467854 PMCID: PMC9092348 DOI: 10.1021/acs.inorgchem.2c00842] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Platinum compounds
cytotoxicity is strictly related to their ability
to be converted into active mono- and di-aquated species and consequently
to the replacement of labile ligands by water molecules. This activation
process makes the platinum center prone to nucleophilic substitution
by DNA purines. In the present work, quantum mechanical density functional
theory (DFT) computations and experimental investigations were carried
out in order to shed light on the relationship between the internalization,
aquation, and DNA binding of two isostructural anionic theranostic
complexes previously reported by our group, NBu4[(PhPy)Pt(Aliz)], 1 (IC50 1.9 ± 1.6 μM), and NBu4[(PhPy)Pt(BrCat)], 2 (IC50 52.8 ± 3.9
μM). Cisplatin and a neutral compound [(NH3)2Pt(Aliz)], 3, were also taken as reference compounds.
The computed energy barriers and the endergonicity of the hydrolysis
reactions showed that the aquation rates are comparable for 1 and 2, with a slightly higher reactivity of 1. The second hydrolysis process was proved to be the rate-determining
step for both 1 and 2, unlike for compound 3. The nucleophilic attack by the N7 site of guanine to both
mono- and di-aquated forms of the complexes was computationally investigated
as well, allowing to rationalize the observed different cytotoxicity.
Computational results were supported by photostability data and biological
assays, demonstrating DNA as the main target for compound 1. An experimental−theoretical approach
to study the
cytotoxicity of ionic Pt(II) complexes containing (O^O) chelating
ancillary ligands.
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Affiliation(s)
- Gloria Mazzone
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Arcavacata di Rende, Cosenza 87036, Italy
| | - Stefano Scoditti
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Arcavacata di Rende, Cosenza 87036, Italy
| | - Rossella Caligiuri
- MAT-InLAB, LASCAMM CR-INSTM, Unità INSTM della Calabria, Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Arcavacata di Rende, Cosenza 87036, Italy
| | - Loredana Ricciardi
- CNR NANOTEC, Institute of Nanotechnology U.O.S. Cosenza, Arcavacata di Rende, Cosenza 87036, Italy
| | - Emilia Sicilia
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Arcavacata di Rende, Cosenza 87036, Italy
| | - Maria Giovanna Lupo
- Dipartimento di Medicina, Università degli Studi di Padova, Padova 35128, Italy
| | - Isabella Rimoldi
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Venezian 21, Milan 20133, Italy
| | - Nicolas Godbert
- MAT-InLAB, LASCAMM CR-INSTM, Unità INSTM della Calabria, Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Arcavacata di Rende, Cosenza 87036, Italy
| | - Massimo La Deda
- MAT-InLAB, LASCAMM CR-INSTM, Unità INSTM della Calabria, Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Arcavacata di Rende, Cosenza 87036, Italy.,CNR NANOTEC, Institute of Nanotechnology U.O.S. Cosenza, Arcavacata di Rende, Cosenza 87036, Italy
| | - Andreea Ionescu
- MAT-InLAB, LASCAMM CR-INSTM, Unità INSTM della Calabria, Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Arcavacata di Rende, Cosenza 87036, Italy
| | - Mauro Ghedini
- MAT-InLAB, LASCAMM CR-INSTM, Unità INSTM della Calabria, Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Arcavacata di Rende, Cosenza 87036, Italy
| | - Iolinda Aiello
- MAT-InLAB, LASCAMM CR-INSTM, Unità INSTM della Calabria, Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Arcavacata di Rende, Cosenza 87036, Italy.,CNR NANOTEC, Institute of Nanotechnology U.O.S. Cosenza, Arcavacata di Rende, Cosenza 87036, Italy
| | - Giorgio Facchetti
- Dipartimento di Scienze Farmaceutiche, Università degli Studi di Milano, Via Venezian 21, Milan 20133, Italy
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11
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Scoditti S, Dabbish E, Pieslinger GE, Rezabal E, Lopez X, Sicilia E, Salassa L. Flavin-mediated photoactivation of Pt(IV) anticancer complexes: computational insights on the catalytic mechanism. Phys Chem Chem Phys 2022; 24:5323-5329. [PMID: 35188500 DOI: 10.1039/d1cp05507k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanism for the photocatalytic activation of Pt(IV) anticancer prodrugs by riboflavin in the presence of NADH has been investigated by DFT. In the first step of the reaction, the oxidation kinetics of NADH to afford the catalytically active riboflavin hydroquinone is dramatically favoured by generation of the flavin triplet excited state. In the triplet, formation of a π-π stacked adduct promotes the hydride transfer from NADH to riboflavin with an almost barrierless pathway (2.7 kcal mol-1). In the singlet channel, conversely, the process is endergonic and requires overcoming a higher activation energy (19.2 kcal mol-1). In the second half of the reaction, the reduction of the studied Pt(IV) complexes by riboflavin hydroquinone occurs via an inner sphere mechanism, displaying free energy barriers smaller than 10 kcal mol-1. Pt reduction by bioreductants such as NADH and ascorbate involve instead less stabilized transition states (22.2-38.3 kcal mol-1), suggesting that riboflavin hydroquinone is an efficient reducing agent for Pt(IV) derivatives in biological settings.
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Affiliation(s)
- Stefano Scoditti
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende (CS), 87036, Italy.
| | - Eslam Dabbish
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende (CS), 87036, Italy.
| | - German E Pieslinger
- CONICET - Universidad de Buenos Aires, Instituto de Química y Fisicoquímica Biológicas (IQUIFIB), Buenos Aires, Argentina
| | - Elixabete Rezabal
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia, 20018, Spain. .,Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia, 20018, Spain
| | - Xabier Lopez
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia, 20018, Spain. .,Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia, 20018, Spain
| | - Emilia Sicilia
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende (CS), 87036, Italy.
| | - Luca Salassa
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, Donostia, 20018, Spain. .,Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia, Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, Paseo Manuel de Lardizabal 3, Donostia, 20018, Spain.,Ikerbasque, Basque Foundation for Science, Bilbao, 48011, Spain
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12
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Poyac L, Scoditti S, dumail X, Granier M, Clément S, Gramage-Doria R, Devillers CH, Richeter S. Electronic, steric and catalytic properties of N-heterocyclic carbene rhodium(I) complexes linked to (metallo)porphyrins. Chem Commun (Camb) 2022; 58:13270-13273. [DOI: 10.1039/d2cc05547c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Electronic and steric properties of NHC ligands functionalized with porphyrins were investigated. When porphyrins are used as NHC-wingtips, nickel(II) in the macrocyle significantly improves the catalytic activity of the neighbouring...
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13
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Scoditti S, Mazzone G, Sicilia E. Computational Analysis of Photophysical Properties and Reactivity of a New Phototherapeutic Cyclometalated Au(III)-Hydride Complex. Chemistry 2021; 27:15528-15535. [PMID: 34546592 DOI: 10.1002/chem.202102701] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 07/24/2021] [Indexed: 01/25/2023]
Abstract
Gold(III) complexes have recently emerged as new versatile and efficacious metal containing anticancer agents. In an attempt to reconcile the specific affinity of such complexes for target sulfur containing biomolecules with their capability to strongly bind thiol-containing compounds widely distributed in non-tumoral cells, a new series of cyclometalated Au(III)-hydride complexes has been proposed as photoactivatable anticancer prodrugs. Here, the computational exploration of the photophysical properties and reactivity in dark and under light irradiation of the first member of the series, named 1 a, is reported. Complex 1 a low hydricity in dark together with facile hydride substitution leading to H2 elimination under excitation by visible light have been examined by means of DFT and TD-DFT computations. Both singlet and triplet excited states have been characterized, allowing the identification of the active species involved in photoactivation pathways leading to the controlled detachment of the hydride ligand. Also the viable two-photon activation at the ideal phototherapeutic window has been investigated.
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Affiliation(s)
- Stefano Scoditti
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, 87036, Rende, CS, Italy
| | - Gloria Mazzone
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, 87036, Rende, CS, Italy
| | - Emilia Sicilia
- Department of Chemistry and Chemical Technologies, University of Calabria, Via P. Bucci, 87036, Rende, CS, Italy
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14
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Scoditti S, Dabbish E, Russo N, Mazzone G, Sicilia E. Anticancer Activity, DNA Binding, and Photodynamic Properties of a N∧C∧N-Coordinated Pt(II) Complex. Inorg Chem 2021; 60:10350-10360. [PMID: 34170132 DOI: 10.1021/acs.inorgchem.1c00822] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the effort to discover new targets and improve the therapeutic efficacy of metal-containing anticancer compounds, transition metal complexes that can elicit cytotoxicity when irradiated with light of a proper wavelength and, then, candidates as potential photosensitizers for photodynamic therapy are actively being investigated. In this work, the cytotoxicity in the dark and the photophysical properties of the complex Pt(N∧C∧N)Cl, where the N∧C∧N ligand is 2,6-dipyrido-4-methyl-benzene chloride, are investigated in detail by means of a series of theoretical levels, that is density functional theory and its time-dependent extension together with molecular dynamics (MD) simulations. In the dark, cytotoxicity has been explored by simulating the steps of the mechanism of action of classical Pt(II) complexes. The suitability of the investigated complex to act as a photosensitizer has been verified by calculating spectroscopic properties for both the unperturbed complex and its aquated and guanine-bound forms. Furthermore, using MD simulation outcomes as a starting point, the photophysical properties of DNA-intercalated and -bound complexes have been evaluated with the goal of establishing how intercalation and binding affect sensitization activity.
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Affiliation(s)
- Stefano Scoditti
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, CS, Italy
| | - Eslam Dabbish
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, CS, Italy
| | - Nino Russo
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, CS, Italy
| | - Gloria Mazzone
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, CS, Italy
| | - Emilia Sicilia
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende, CS, Italy
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15
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Scoditti S, Vigna V, Dabbish E, Sicilia E. Iodido equatorial ligands influence on the mechanism of action of Pt(IV) and Pt(II) anti-cancer complexes: A DFT computational study. J Comput Chem 2021; 42:608-619. [PMID: 33469953 DOI: 10.1002/jcc.26483] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 11/08/2020] [Revised: 12/27/2020] [Accepted: 01/06/2021] [Indexed: 11/08/2022]
Abstract
A detailed computational exploration of the most relevant steps of iodido Pt(IV) complexes reduction and Pt(II) drugs mechanism of action and eventual deactivation is presented here inspired by the recent findings on iodido Pt(II) complexes and surprising re-evaluation of their cytotoxic activity. Pt(II) and Pt(IV) model systems are investigated and compared with cisplatin and its Pt(IV) derivative. Both monodeprotonated ascorbic acid and l-cysteine are used as reducing agents in the inner-sphere reduction mechanism of Pt(IV) complexes. Aquation mechanism of iodido Pt(II) complexes, interaction with guanine and sulfur containing compounds and reaction with the model protein hen egg white lysozyme are explored, due to a detected different behavior with respect to classical platinum drugs. The outcomes of such exploration allow to shed light on the role that the increased soft character together with bridging and leaving abilities of iodide over chloride could play in determining the cytotoxic profile of iodido Pt drugs.
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Affiliation(s)
- Stefano Scoditti
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende, Italy
| | - Vincenzo Vigna
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende, Italy
| | - Eslam Dabbish
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende, Italy
| | - Emilia Sicilia
- Department of Chemistry and Chemical Technologies, Università della Calabria, Arcavacata di Rende, Italy
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16
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Scoditti S, Dabbish E, Sicilia E. Is the cytotoxic activity of phenanthriplatin dependent on the specific size of the phenanthridine ligand π system? J Inorg Biochem 2021; 219:111447. [PMID: 33798829 DOI: 10.1016/j.jinorgbio.2021.111447] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/04/2021] [Accepted: 03/24/2021] [Indexed: 12/12/2022]
Abstract
The monofunctional Pt(II) drug phenanthriplatin is a leading preclinical anticancer drug, whose main characteristic is the presence of the extended aromatic system of the phenanthridine ligand, which allows intercalation. Intercalation, in turn, induces DNA unwinding and facilitates DNA binding. Aiming at verifying to what extent the peculiar cytotoxic activity of phenanthriplatin depends on the specific size of the aromatic system, two phenanthriplatin derivatives have been designed increasing the number of the rings in the N-heterocyclic ligand, and their reactivity has been computationally investigated. Both quantum mechanical DFT computations and molecular dynamics (MD) simulations have been employed to investigate some of the aspects that are considered important for the activity of Pt(II) monofunctional complexes. In particular, the substitution of the chlorido ligand with water, subsequent interaction of the aquated complexes with guanine as a model, eventual deactivation by the model N-acetyl methionine as well as intercalation into, binding to and distortion of DNA have been examined. The outcomes of such analysis have been compared with the analogous ones for the phenanthriplatin complex in order to highlight how the addition of one more ring to the phenanthridine ligand and, eventually, its identity influence the reactivity and, consequently, the cytotoxic profile of the complexes.
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Affiliation(s)
- Stefano Scoditti
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy
| | - Eslam Dabbish
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy.
| | - Emilia Sicilia
- Department of Chemistry and Chemical Technologies, Università della Calabria, 87036 Arcavacata di Rende (CS), Italy.
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17
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Donno M, Aversa C, Corsico R, Foresi A, Grassi V, Malerba M, Mastropasqua B, Scoditti S, Olivieri D. Efficacy and Safety of Moguisteine in Comparison with Dextromethorphan in Patients with Persistent Cough. ACTA ACUST UNITED AC 2012. [DOI: 10.1007/bf03257404] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Bonfitto P, Lamorgese V, De Vietro T, Malerba M, Rizzello L, Scoditti S, Zuin R. A randomized trial of cefepime and ceftazidime for the treatment of community-acquired pneumonia. J Chemother 1999; 11:273-7. [PMID: 10465129 DOI: 10.1179/joc.1999.11.4.273] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
We compared the effectiveness and safety of ceftazidime and cefepime in hospitalized patients with community-acquired pneumonia. The 148 enrolled patients received 2 g ceftazidime three times daily or 2 g cefepime twice daily. The clinical success rate was the same for both drugs. Even the microbiological effectiveness was similar. Both drug regimens were well tolerated. We conclude that 2 g ceftazidime three times daily were as effective as 2 g cefepime twice daily for the treatment of community-acquired pneumonia in hospitalized patients. The cost of ceftazidime treatment was, however, higher than the cost of cefepime treatment.
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Affiliation(s)
- P Bonfitto
- Division of Pneumology - S. Michele M. Laureto Hospital, Putignano, Italy
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19
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Lorusso V, Pezzella G, Catino A, Guida M, Scoditti S, Lorenzo R, Toma P, Dellatommasa S, Bisconti M, Mastria A, Durini E, Musca F, Serravezza G, Mazzotta S, Forcignano R, Delena M. Results of a clinical multicentric randomized phase-ii study of nonsmall cell lung-cancer treated with vinorelbine Cisplatin versus vinorelbine alone. Int J Oncol 1995; 6:65-8. [PMID: 21556502 DOI: 10.3892/ijo.6.1.65] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
From July 1992 to December 1993, 62 patients with non-small cell lung cancer (NSCLC) were admitted to a multicentric randomized study. The patients were treated with vinorelbine (V) alone at a dose of 25 mg/m(2)/i.v. weekly or with V at a dose of 25 mg/m(2)/i.v. on day 1 and 8 plus cisplatin at a dose of 80 mg/m(2)/i.v. on day 1 every 3-4 weeks (VP). An objective response was observed in 42% of patients treated with VP versus 12.5% of those treated with vinorelbine alone (p=0.038). There was no significant difference in the median survival duration between the two groups (38 versus 30 weeks for VP and V, respectively). Toxicity was tolerable but more severe in the VP regimen. These data suggest that V is an active agent in NSCLC and that the VP regimen may yield results comparable to other cisplatin combinations for treatment of these tumors.
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Affiliation(s)
- V Lorusso
- ONCOL INST,DIV MED ONCOL,I-70126 BARI,ITALY. ONCOL CTR,TARANTO,ITALY. HOSP GALATEO,LECCE,ITALY. HOSP F PANICO,TRICASE,ITALY. CIVIL HOSP,POGGIARDO,ITALY. CIVIL HOSP,CASARANO,ITALY
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20
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Aversa C, Montuori L, Frassanito M, Massari G, Scoditti S, Scorrano F. [A transversal epidemiological study of factors associated with risk of respiratory diseases in a school-age population of Southern Italy]. Arch Monaldi Mal Torace 1988; 43:249-56. [PMID: 3270495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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21
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Aversa C, Scorrano F, Scoditti S, Pancosta G, Stomeo S. [Protective action of broxaterol in bronchial spasm induced by ultrasonic mist]. Arch Monaldi Mal Torace 1988; 43:243-8. [PMID: 2908378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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22
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Scoditti A, Scoditti S, Melica A. [Case contribution to the knowledge of Marfan's syndrome: description of a clinical case]. Arch Monaldi Mal Torace 1988; 43:225-34. [PMID: 3270493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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23
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Aversa C, Giurgola S, Isola R, Scoditti S. [Respiratory rehabilitation with a new respiratory brake system]. Arch Monaldi Mal Torace 1987; 42:355-63. [PMID: 3155415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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24
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D'Amico P, De Fazio A, Peccarisi G, Zurlo V, Epifani V, Scoditti S. [Caseload and epidemiologico-statistic findings about cases of spontaneous hemothorax at the A. Tanzarella Hospital of Ostuni from 1978 to 1986]. Arch Monaldi Mal Torace 1987; 42:365-82. [PMID: 3509655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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25
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Scoditti S, Quitadamo M, Toma P, Paladini A, Quarta-Colosso M, Spirito F. [Echocardiographic findings in pulmonary arterial hypertension]. Arch Monaldi 1985; 40:239-46. [PMID: 2952100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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26
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Scoditti S, Lorenzo R, Campobasso M. [Gas analysis evaluation in pleural fluid]. Arch Monaldi 1984; 39:75-82. [PMID: 6442558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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27
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Scoditti S, Colella A, Campobasso M. [Amiodarone in subjects with pneumopathies]. Arch Monaldi 1984; 39:83-90. [PMID: 6532352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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28
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Gaballo S, Gala P, Rubino F, Scoditti S. [Changes in immunoglobulinic classes from the time of BCG vaccination to the appearance of tuberculin reaction]. Lotta Tuberc 1968; 38:95-103. [PMID: 4187119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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