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Beyeh NK, Puttreddy R. Methylresorcinarene: a reaction vessel to control the coordination geometry of copper(II) in pyridine N-oxide copper(II) complexes. Dalton Trans 2015; 44:9881-6. [PMID: 25939967 DOI: 10.1039/c5dt01143d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Pyridine and 2-picolinic acid N-oxides form 2 : 2 and 2 : 1 ligand : metal (L : M) discrete L2M2 and polymeric complexes with CuCl2 and Cu(NO3)2, respectively, with copper(ii) salts. The N-oxides also form 1 : 1 host-guest complexes with methylresorcinarene. In combination, the three components form a unique 2 : 2 : 1 host-ligand-metal complex. The methylresorcinarene acts as a reaction vessel/protecting group to control the coordination of copper(ii) from cis-see-saw to trans-square planar, and from octahedral to square planar coordination geometry. These processes were studied in solution and in the solid state via(1)H NMR spectroscopy and single crystal X-ray diffraction.
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Affiliation(s)
- Ngong Kodiah Beyeh
- University of Jyvaskyla, Department of Chemistry, P. O. Box 35, 40014 University of Jyvaskyla, Jyvaskyla, Finland.
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Filho JCC, Sarria ALF, Becceneri AB, Fuzer AM, Batalhão JR, da Silva CMP, Carlos RM, Vieira PC, Fernandes JB, Cominetti MR. Copper (II) and 2,2'-bipyridine complexation improves chemopreventive effects of naringenin against breast tumor cells. PLoS One 2014; 9:e107058. [PMID: 25192075 PMCID: PMC4156406 DOI: 10.1371/journal.pone.0107058] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 08/05/2014] [Indexed: 12/17/2022] Open
Abstract
Cancer is the second leading cause of death worldwide and there is epidemiological evidence that demonstrates this tendency is emerging. Naringenin (NGEN) is a trihydroxyflavanone that shows various biological effects such as antioxidant, anticancer, anti-inflammatory, and antiviral activities. It belongs to flavanone class, which represents flavonoids with a C6-C3-C6 skeleton. Flavonoids do not exhibit sufficient activity to be used for chemotherapy, however they can be chemically modified by complexation with metals such as copper (Cu) (II) for instance, in order to be applied for adjuvant therapy. This study investigated the effects of Cu(II) and 2,2′-bipyridine complexation with naringenin on MDA-MB-231 cells. We demonstrated that naringenin complexed with Cu(II) and 2,2′-bipyridine (NGENCuB) was more efficient inhibiting colony formation, proliferation and migration of MDA-MB-231 tumor cells, than naringenin (NGEN) itself. Furthermore, we verified that NGENCuB was more effective than NGEN inhibiting pro-MMP9 activity by zymography assays. Finally, through flow cytometry, we showed that NGENCuB is more efficient than NGEN inducing apoptosis in MDA-MB-231 cells. These results were confirmed by gene expression analysis in real time PCR. We observed that NGENCuB upregulated the expression of pro-apoptotic gene caspase-9, but did not change the expression of caspase-8 or anti-apoptotic gene Bcl-2. There are only few works investigating the effects of Cu(II) complexation with naringenin on tumor cells. To the best of our knowledge, this is the first work describing the effects of Cu(II) complexation of a flavonoid on MDA-MB-231 breast tumor cells.
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Affiliation(s)
| | | | | | - Angelina Maria Fuzer
- Departamento de Gerontologia, Universidade Federal de São Carlos, São Carlos, SP, Brazil
| | | | | | - Rose Maria Carlos
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP, Brazil
| | - Paulo Cezar Vieira
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, SP, Brazil
| | | | - Márcia Regina Cominetti
- Departamento de Gerontologia, Universidade Federal de São Carlos, São Carlos, SP, Brazil
- * E-mail:
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Synthesis, characterization, and cytotoxicity studies of Cu(II), Zn(II), and Fe(III) complexes of N-derivatized 3-hydroxy-4-pyridiones. J Inorg Biochem 2014; 132:59-66. [DOI: 10.1016/j.jinorgbio.2013.12.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 12/09/2013] [Accepted: 12/13/2013] [Indexed: 12/16/2022]
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Santini C, Pellei M, Gandin V, Porchia M, Tisato F, Marzano C. Advances in Copper Complexes as Anticancer Agents. Chem Rev 2013; 114:815-62. [DOI: 10.1021/cr400135x] [Citation(s) in RCA: 1128] [Impact Index Per Article: 102.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Carlo Santini
- Scuola
di Scienze e Tecnologie−Sez. Chimica, Università di Camerino, via S. Agostino 1, 62032 Camerino, Macerata, Italy
| | - Maura Pellei
- Scuola
di Scienze e Tecnologie−Sez. Chimica, Università di Camerino, via S. Agostino 1, 62032 Camerino, Macerata, Italy
| | - Valentina Gandin
- Dipartimento
di Scienze del Farmaco, Università di Padova, via Marzolo
5, 35131 Padova, Italy
| | | | | | - Cristina Marzano
- Dipartimento
di Scienze del Farmaco, Università di Padova, via Marzolo
5, 35131 Padova, Italy
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Structure–activity relationship disturbed by a solvolytic process: Study on the [Cu(II)-4-nitropyridine N-oxide derivative] system. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.09.060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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