1
|
Latex membranes with methylene blue dye for antimicrobial photodynamic therapy. Photochem Photobiol Sci 2021; 20:1027-1032. [PMID: 34292539 DOI: 10.1007/s43630-021-00077-z] [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: 01/20/2021] [Accepted: 07/13/2021] [Indexed: 10/20/2022]
Abstract
The search for new materials that can be applied in the treatment of injured human tissues has led to the development of new dressings. Membranes have potential as dressing materials because they can be fitted to and interact with the tissue surface. In this study, we analyze the morphological properties and wettability of latex membranes, along with the incorporation of the photosensitizer methylene blue, in the context of the utility of the membranes in curative applications involving photodynamic therapy (PDT). It was observed that deposition of the photosensitizer into latex membranes increased both the surface roughness and wettability. Antifungal testing indicated that antimicrobial PDT assisted by the latex membranes incorporating methylene blue effectively inactivated Candida albicans.
Collapse
|
2
|
Costa Pedro MF, Kalck AS, dos Santos KF, Sousa MS, Romio KB, Souto PC, Silva JR, de Souza NC. Immobilization of triclosan and erythrosine in layer-by-layer films applied to inactivation of microorganisms. Photodiagnosis Photodyn Ther 2018; 22:158-165. [DOI: 10.1016/j.pdpdt.2018.04.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/14/2018] [Accepted: 04/18/2018] [Indexed: 11/29/2022]
|
3
|
Gorza FDS, da Silva RJ, Trescher TF, Pedro GC, de Sousa MAO, Souto PCS, Silva JR, de Souza NC. Immobilization of chlorophyll by using layer-by-layer technique for controlled release systems and photodynamic inactivation. Photodiagnosis Photodyn Ther 2016; 15:147-55. [PMID: 27375091 DOI: 10.1016/j.pdpdt.2016.06.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 06/15/2016] [Accepted: 06/28/2016] [Indexed: 12/16/2022]
Abstract
The development of systems for the controlled release of drugs is important because they allow the control of drug absorption and tissue distribution and also can reduce local toxicity. This study aimed to assemble and characterize two types of release systems, consisting of layer-by-layer films obtained from poly(allylamine) hydrochloride with chlorophyll (PAH/CHL films) or chlorophyll incorporated into dipalmitoylphosphatidylcholine liposomes (PAH/Lip+CHL films). For these systems, the molecular aggregation, growth process, thermally stimulated desorption, wettability, and controlling release of CHL was studied by using UV-vis spectroscopy and wetting contact angle analysis. In addition, experiments of photodynamic inactivation using PAH/CHL or PAH/Lip+CHL films with a 633-nm laser light were performed and the susceptibility of Candida albicans (C. albicans) to this approach was examined. Fluorescence and atomic force microscopies were used to investigate the surface morphology after the application of the photoinactivation procedure. A redshift of the UV-vis spectrum associated to films when compared with the spectrum of the CHL solution indicated a molecular aggregation of CHL molecules in the films. The film growth process was determined by a nucleation and a growth of spheroids or rods for either PAH/Lip+CHL or PAH/CHL films, respectively. Thermally activated desorption experiments indicated that interactions between CHL and PAH (126kJ/mol) in PAH/CHL or between Lip+CHL and PAH (140kJ/mol) in PAH/Lip+CHL films may be governed by electrostatic interactions. The wettability of PAH/Lip+CHL films was larger than that for PAH/CHL films, which can be attributed to hydrophilic groups on the surface of the DPPC liposomes. Release experiments revealed that free CHL in PAH/CHL films was released more slowly than its partner incorporated into liposomes. After the photodynamic inactivation, results of survival fraction and fluorescence microscopy revealed that C. albicans presented similar susceptibility for the two kinds of films. AFM supported the fluorescence one suggesting that cell death of C. albicans may occur due to damages to its cell wall by C. albicans.
Collapse
Affiliation(s)
- Filipe D S Gorza
- Grupo de Materiais Nanoestruturados, Universidade Federal de Mato Grosso, Barra do Garças, Mato Grosso, Brazil
| | - Romário J da Silva
- Grupo de Materiais Nanoestruturados, Universidade Federal de Mato Grosso, Barra do Garças, Mato Grosso, Brazil
| | - Tarquin F Trescher
- Grupo de Materiais Nanoestruturados, Universidade Federal de Mato Grosso, Barra do Garças, Mato Grosso, Brazil
| | - Graciela C Pedro
- Grupo de Materiais Nanoestruturados, Universidade Federal de Mato Grosso, Barra do Garças, Mato Grosso, Brazil
| | - Maria A Oliveira de Sousa
- Grupo de Materiais Nanoestruturados, Universidade Federal de Mato Grosso, Barra do Garças, Mato Grosso, Brazil
| | - Paula C S Souto
- Grupo de Materiais Nanoestruturados, Universidade Federal de Mato Grosso, Barra do Garças, Mato Grosso, Brazil
| | - Josmary R Silva
- Grupo de Materiais Nanoestruturados, Universidade Federal de Mato Grosso, Barra do Garças, Mato Grosso, Brazil
| | - Nara C de Souza
- Grupo de Materiais Nanoestruturados, Universidade Federal de Mato Grosso, Barra do Garças, Mato Grosso, Brazil.
| |
Collapse
|
4
|
Morphological analysis and interaction of chlorophyll and BSA. BIOMED RESEARCH INTERNATIONAL 2014; 2014:872701. [PMID: 24963490 PMCID: PMC4052157 DOI: 10.1155/2014/872701] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 04/21/2014] [Accepted: 04/21/2014] [Indexed: 12/04/2022]
Abstract
Interactions between proteins and drugs, which can lead to formation of stable drug-protein complexes, have important implications on several processes related to human health. These interactions can affect, for instance, free concentration, biological activity, and metabolism of the drugs in the blood stream. Here, we report on the UV-Visible spectroscopic investigation on the interaction of bovine serum albumin (BSA) with chlorophyll (Chl) in aqueous solution under physiological conditions. Binding constants at different temperatures—obtained by using the Benesi-Hildebrand equation—were found to be of the same order of magnitude (~104 M−1) indicating low affinity of Chl with BSA. We have found a hyperchromism, which suggested an interaction between BSA and Chl occurring through conformational changes of BSA caused by exposition of tryptophan to solvent. Films from BSA and Chl obtained at different Chl concentrations showed fractal structures, which were characterized by fractal dimension calculated from microscopic image analysis.
Collapse
|
5
|
Brito JB, Gomes DJ, Justina VD, Lima AM, Olivati CA, Silva JR, de Souza NC. Nanostructured films from phthalocyanine and carbon nanotubes: Surface morphology and electrical characterization. J Colloid Interface Sci 2012; 367:467-71. [DOI: 10.1016/j.jcis.2011.10.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 09/02/2011] [Accepted: 10/01/2011] [Indexed: 11/16/2022]
|
6
|
Asadzadeh Shahir A, Javadian S, Razavizadeh BBM, Gharibi H. Comprehensive Study of Tartrazine/Cationic Surfactant Interaction. J Phys Chem B 2011; 115:14435-44. [DOI: 10.1021/jp2051323] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Afshin Asadzadeh Shahir
- Department of Physical Chemistry, Tarbiat Modares University, P.O. Box 14115-117, Tehran, Iran
| | - Soheila Javadian
- Department of Physical Chemistry, Tarbiat Modares University, P.O. Box 14115-117, Tehran, Iran
| | - Bi Bi Marzieh Razavizadeh
- Khorasan Research Institute for Food Science & Technology, 12th km of Mashhad-Quchan Highway, P.O. Box 91735-139, Mashhad, Iran
| | - Hussein Gharibi
- Department of Physical Chemistry, Tarbiat Modares University, P.O. Box 14115-117, Tehran, Iran
| |
Collapse
|