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de Souza C, Carvalho JA, Abreu AS, de Paiva LP, Ambrósio JAR, Junior MB, de Oliveira MA, Mittmann J, Simioni AR. Polyelectrolytic gelatin nanoparticles as a drug delivery system for the promastigote form of Leishmania amazonensis treatment. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2020; 32:1-21. [PMID: 32847485 DOI: 10.1080/09205063.2020.1815495] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In this study, phthalocianato[bis(dimethylaminoethanoxy)] silicon (NzPC) was loaded onto gelatin nanoparticles functionalized with polyelectrolytes (polystyrene sulfonate/polyallylamine hydrochloride) by layer-by-layer (LbL) assembly for photodynamic therapy (PDT) application in promastigote form of Leishmania amazonensis treatment. The process yield, and encapsulation efficiency were 80.0% ± 1.8 and EE = 87.0% ± 1.1, respectively. The polyelectrolytic gelatin nanoparticles (PGN) had a mean diameter of 437.4 ± 72.85 nm, narrow distribution size with a polydispersity index of 0.086. The obvious switching of zeta potential indicates successful alternating deposition of the polyanion PSS and polycation PAH directly on the gelatin nanoparticles. Photosensitizer photophysical properties were shown to be preserved after gelatin nanoparticle encapsulation. The impact of the PDT in the viability and morphology of Leishmania amazonensis promastigote in culture medium was evaluated. The PGN-NzPc presented low toxicity at the dark and the PDT was capable of decreasing the viability in more than 80% in 0.1 µmol.L-1 concentration tested. The PDT also triggered significant morphological alterations in the Leishmania promastigotes. These results reinforce the idea that the use of PGN as photosensitizers carriers is useful for PDT of Leishmania promastigotes.
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Affiliation(s)
- Catarina de Souza
- Organic Synthesis Laboratory, Research and Development Institute - IPD, Vale do Paraíba University, São José dos Campos, SP, Brazil
| | - Janicy A Carvalho
- Departament of Chemistry, Center of Nanotechnology and Tissue Engineering- Photobiology and Photomedicine (CNET), University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Alexandro S Abreu
- Departament of Chemistry, Center of Nanotechnology and Tissue Engineering- Photobiology and Photomedicine (CNET), University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Lucas P de Paiva
- Organic Synthesis Laboratory, Research and Development Institute - IPD, Vale do Paraíba University, São José dos Campos, SP, Brazil
| | - Jéssica A R Ambrósio
- Organic Synthesis Laboratory, Research and Development Institute - IPD, Vale do Paraíba University, São José dos Campos, SP, Brazil
| | - Milton Beltrame Junior
- Organic Synthesis Laboratory, Research and Development Institute - IPD, Vale do Paraíba University, São José dos Campos, SP, Brazil
| | - Marco A de Oliveira
- Organic Synthesis Laboratory, Research and Development Institute - IPD, Vale do Paraíba University, São José dos Campos, SP, Brazil
| | - Josane Mittmann
- Distance Education Coordination, Vila Velha University, Vila Velha, ES, Brazil
| | - Andreza R Simioni
- Organic Synthesis Laboratory, Research and Development Institute - IPD, Vale do Paraíba University, São José dos Campos, SP, Brazil
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