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Bergmann EV, Capeloto OA, Catanio ATS, Flizikowski GAS, Kimura NM, Freitas CF, Herculano LS, Astrath NGC, Malacarne LC. Photoactivation of Erythrosine in simulated body fluids. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 259:119867. [PMID: 33991815 DOI: 10.1016/j.saa.2021.119867] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/15/2021] [Accepted: 04/19/2021] [Indexed: 06/12/2023]
Abstract
Photodynamic Therapy (PDT) is a powerful technique for the treatment of cancer and non-cancerous diseases. The precise PDT treatment protocol definition must consider the performance difference between in vitroand in vivoapplications. This also occurs in other biological studies, and to partially overcome this difficulty, the simulated body fluids are generally applied as a prior understanding of the particularities of the different systems. However, in PDT these studies are scarce. In this work, we investigated the photoactivation of Erythrosine, a photosensitizer widely used in PDT, in different simulated body fluids. Differences in the photodegradation kinetics, triplet lifetime, and singlet oxygen generation were observed. The results can help to explain and to define PDT application protocols.
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Affiliation(s)
- Eduardo V Bergmann
- Departamento de Física, Universidade Estadual de Maringá, Maringá, PR 87020-900, Brazil
| | - Otávio A Capeloto
- Instituto de Saúde e Biotecnologia de Coari, Universidade Federal do Amazonas, Coari, AM 69460-000, Brazil
| | - Angelo T S Catanio
- Departamento de Física, Universidade Estadual de Maringá, Maringá, PR 87020-900, Brazil
| | | | - Newller M Kimura
- Departamento de Física, Universidade Estadual de Maringá, Maringá, PR 87020-900, Brazil
| | - Camila F Freitas
- Departamento de Química, Universidade Estadual de Maringá, Maringá, PR 87020-900, Brazil
| | - Leandro S Herculano
- Departamento de Física, Universidade Tecnológica Federal do Paraná, Medianeira, PR 85884-000, Brazil
| | - Nelson G C Astrath
- Departamento de Física, Universidade Estadual de Maringá, Maringá, PR 87020-900, Brazil.
| | - Luis C Malacarne
- Departamento de Física, Universidade Estadual de Maringá, Maringá, PR 87020-900, Brazil.
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Soret effect in lyotropic liquid crystal in the isotropic phase revealed by time-resolved thermal lens. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113381] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Camargo VG, Zanuto VS, Astrath NGC, Caetano W, Hioka N, Pereira PCS, Gonçalves RS, Lukasievicz GVB, Herculano LS, Malacarne LC. From Protohypericin to Hypericin: Photoconversion Analysis Using a Time-Resolved Thermal Lens Technique. APPLIED SPECTROSCOPY 2019; 73:936-944. [PMID: 31149836 DOI: 10.1177/0003702819846921] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Hypericin (Hyp) is a natural compound with interesting photophysical and pharmacological properties, which has been used in photodynamic therapy and photodynamic inactivation of microorganisms. Its synthesis is based on a series of chemical processes that ends with a light-drug interaction by the photoconversion of protohypericin (pHyp) to Hyp. Although this photosensitizer is used in a variety of medical applications, the photophysical and photochemical mechanisms involved in the final step related to the photo production of Hyp are not completely understood at the molecular level. Protohypericin concentration, solvents, light irradiation under different wavelengths, and a sort of variables could play an important role in predicting the yielding of this photoconversion process. Here, we used the high-sensitive and remote measurement characteristics of the time-resolved thermal lens technique to investigate the relation between the light-induced photoconversion rate of pHyp to Hyp and the initial concentration pHyp. The results show a linear dependence of the photoreaction rate with the concentration of pHyp, indicating that the overall reaction process includes steps comprising the formation of distinct intermediate species. We demonstrate the applicability of the thermal lens technique for the photochemical characterization of photosensitive drugs at low concentration levels.
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Affiliation(s)
- Vinicius G Camargo
- 1 Departamento de Física, Universidade Estadual de Maringá, Maringá - PR, Brazil
| | - Vitor S Zanuto
- 1 Departamento de Física, Universidade Estadual de Maringá, Maringá - PR, Brazil
| | - Nelson G C Astrath
- 1 Departamento de Física, Universidade Estadual de Maringá, Maringá - PR, Brazil
| | - Wilker Caetano
- 2 Departamento de Química, Universidade Estadual de Maringá, Maringá - PR, Brazil
| | - Noboru Hioka
- 2 Departamento de Química, Universidade Estadual de Maringá, Maringá - PR, Brazil
| | - Paulo C S Pereira
- 2 Departamento de Química, Universidade Estadual de Maringá, Maringá - PR, Brazil
| | - Renato S Gonçalves
- 2 Departamento de Química, Universidade Estadual de Maringá, Maringá - PR, Brazil
| | - Gustavo V B Lukasievicz
- 3 Departamento de Física, Universidade Tecnológica Federal do Paraná, Medianeira - PR, Brazil
| | - Leandro S Herculano
- 3 Departamento de Física, Universidade Tecnológica Federal do Paraná, Medianeira - PR, Brazil
| | - Luis C Malacarne
- 1 Departamento de Física, Universidade Estadual de Maringá, Maringá - PR, Brazil
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Herculano LS, Lukasievicz GVB, Sehn E, Caetano W, Pellosi DS, Hioka N, Astrath NGC, Malacarne LC. Photodegradation in Micellar Aqueous Solutions of Erythrosin Esters Derivatives. APPLIED SPECTROSCOPY 2015; 69:883-888. [PMID: 26036593 DOI: 10.1366/15-07865] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Strong light absorption and high levels of singlet oxygen production indicate erythrosin B as a viable candidate as a photosensitizer in photodynamic therapy or photodynamic inactivation of microorganisms. Under light irradiation, erythrosin B undergoes a photobleaching process that can decrease the production of singlet oxygen. In this paper, we use thermal lens spectroscopy to investigate photobleaching in micellar solutions of erythrosin ester derivatives: methyl, butyl, and decyl esters in low concentrations of non-ionic micellar aqueous solutions. Using a previously developed thermal lens model, it was possible to determine the photobleaching rate and fluorescence quantum efficiency for dye-micelle solutions. The results suggest that photobleaching is related to the intensity of the dye-micelle interaction and demonstrate that the thermal lens technique can be used as a sensitive tool for quantitative measurement of photochemical properties in very diluted solutions.
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Savi EL, Malacarne LC, Baesso ML, Pintro PTM, Croge C, Shen J, Astrath NGC. Investigation into photostability of soybean oils by thermal lens spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 145:125-129. [PMID: 25770935 DOI: 10.1016/j.saa.2015.02.106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 02/19/2015] [Accepted: 02/24/2015] [Indexed: 06/04/2023]
Abstract
Assessment of photochemical stability is essential for evaluating quality and the shelf life of vegetable oils, which are very important aspects of marketing and human health. Most of conventional methods used to investigate oxidative stability requires long time experimental procedures with high consumption of chemical inputs for the preparation or extraction of sample compounds. In this work we propose a time-resolved thermal lens method to analyze photostability of edible oils by quantitative measurement of photoreaction cross-section. An all-numerical routine is employed to solve a complex theoretical problem involving photochemical reaction, thermal lens effect, and mass diffusion during local laser excitation. The photostability of pure oil and oils with natural and synthetic antioxidants is investigated. The thermal lens results are compared with those obtained by conventional methods, and a complete set of physical properties of the samples is presented.
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Affiliation(s)
- E L Savi
- Departamento de Física, Universidade Estadual de Maringá, Maringá, PR 87020-900, Brazil
| | - L C Malacarne
- Departamento de Física, Universidade Estadual de Maringá, Maringá, PR 87020-900, Brazil
| | - M L Baesso
- Departamento de Física, Universidade Estadual de Maringá, Maringá, PR 87020-900, Brazil
| | - P T M Pintro
- Departamento de Agronomia, Universidade Estadual de Maringá, Maringá, PR 87020-900, Brazil
| | - C Croge
- Departamento de Agronomia, Universidade Estadual de Maringá, Maringá, PR 87020-900, Brazil
| | - J Shen
- Energy, Mining and Environment Portfolio, National Research Council Canada, Vancouver, BC V6T-1W5, Canada
| | - N G C Astrath
- Departamento de Física, Universidade Estadual de Maringá, Maringá, PR 87020-900, Brazil.
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