1
|
Souza WA, Ramos LMS, de Almeida AM, Tezuka DY, Lopes CD, Moreira MB, Zanetti RD, Netto AVG, Ferreira FB, de Oliveira RJ, Guedes GP, de Albuquerque S, Silva JRL, Pereira-Maia EC, Resende JALC, de Almeida MV, Guerra W. Preparation, cytotoxic activity and DNA interaction studies of new platinum(II) complexes with 1,10-phenanthroline and 5-alkyl-1,3,4-oxadiazol-2(3H)-thione derivatives. J Inorg Biochem 2022; 237:111993. [PMID: 36108344 DOI: 10.1016/j.jinorgbio.2022.111993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 09/05/2022] [Accepted: 09/05/2022] [Indexed: 01/18/2023]
Abstract
This work describes the synthesis, characterization and in vitro anticancer activity of two platinum(II) complexes of the type [Pt(L1)2(1,10-phen)] 1 and [Pt(L2)2(1,10-phen)] 2, where L1 = 5-heptyl-1,3,4-oxadiazole-2-(3H)-thione, L2 = 5-nonyl-1,3,4-oxadiazole-2-(3H)-thione and 1,10-phen = 1,10-phenanthroline. As to the structure of these complexes, the X-ray structural analysis of 1 indicates that the geometry around the platinum(II) ion is distorted square-planar, where two 5-alkyl-1,3,4-oxadiazol-2-thione derivatives coordinate a platinum(II) ion through the sulfur atom. A chelating bidentate phenanthroline molecule completes the coordination sphere. We tested these complexes in two breast cancer cell lines, namely, MCF-7 (a hormone responsive cancer cell) and MDA-MB-231 (triple negative breast cancer cell). In both cells, the most lipophilic platinum compound, complex 2, was more active than cisplatin, one of the most widely used anticancer drugs nowadays. DNA binding studies indicated that such complexes are able to bind to ct-DNA with Kb values of 104 M-1. According to data from dichroism circular and fluorescence spectroscopy, these complexes appear to bind to the DNA in a non-intercalative, probably via minor groove. Molecular docking followed by semiempirical simulations indicated that these complexes showed favorable interactions with the minor groove of the double helix of ct-DNA in an A-T rich region. Thereafter, flow cytometry analysis showed that complex 2 induced apoptosis and necrosis in MCF-7 cells.
Collapse
Affiliation(s)
- Wesley A Souza
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil; Instituto de Ciências Exatas e da Terra, Campus Universitário do Araguaia, Universidade Federal do Mato Grosso, Pontal do Araguaia, MT, Brazil
| | - Luana M S Ramos
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil
| | - Angelina M de Almeida
- Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Daiane Y Tezuka
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Carla D Lopes
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Mariete B Moreira
- UNESP - Univ. Estadual Paulista, Institute of Chemistry, Araraquara, SP, Brazil; Departamento de Química, Universidade Estadual de Maringá, PR, Brazil
| | - Renan D Zanetti
- UNESP - Univ. Estadual Paulista, Institute of Chemistry, Araraquara, SP, Brazil
| | - Adelino V G Netto
- UNESP - Univ. Estadual Paulista, Institute of Chemistry, Araraquara, SP, Brazil
| | | | - Ronaldo Junio de Oliveira
- Laboratório de Biofísica Teórica, Departamento de Física, Instituto de Ciências Exatas, Naturais e Educação, Universidade Federal do Triângulo Mineiro, Uberaba, MG, Brazil
| | - Guilherme P Guedes
- Instituto de Química, Universidade Federal Fluminense, Campus Valonguinho, Niterói, RJ, Brazil
| | - Sérgio de Albuquerque
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Júlia R L Silva
- Departamento de Química, Universidade Federal de Minas Gerais, Campus Pampulha, Belo Horizonte, MG, Brazil
| | - Elene C Pereira-Maia
- Departamento de Química, Universidade Federal de Minas Gerais, Campus Pampulha, Belo Horizonte, MG, Brazil
| | - Jackson A L C Resende
- Instituto de Ciências Exatas e da Terra, Campus Universitário do Araguaia, Universidade Federal do Mato Grosso, Pontal do Araguaia, MT, Brazil
| | - Mauro V de Almeida
- Departamento de Química, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Wendell Guerra
- Instituto de Química, Universidade Federal de Uberlândia, Campus Santa Mônica, Uberlândia, MG, Brazil.
| |
Collapse
|