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Faverzani Magnago R, Carolina de Aguiar A, Fagundes Valezan I, Mendes de Moraes F, Luiza Ziulkoski A, Dal Pont Morisso F, Alberto Kanis L, Modolon Zepon K. Polycaprolactone triol-based polyurethane film conjugated ibuprofen to sustained release: synthesis, physicochemical, cytotoxic, and release studies. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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de Oliveira JG, Pilz-Júnior HL, de Lemos AB, da Silva da Costa FA, Fernandes M, Gonçalves DZ, Variza PF, de Moraes FM, Morisso FDP, Magnago RF, Zepon KM, Kanis LA, da Silva OS, Prophiro JS. Polymer-based nanostructures loaded with piperine as a platform to improve the larvicidal activity against Aedes aegypti. Acta Trop 2022; 230:106395. [PMID: 35278367 DOI: 10.1016/j.actatropica.2022.106395] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 03/03/2022] [Accepted: 03/08/2022] [Indexed: 11/19/2022]
Abstract
Piperine is an alkaloid extracted from the seed of Piper spp., which has demonstrated a larvicidal effect against Ae. aegypti. The incorporation of piperine into nanostructured systems can increase the effectiveness of this natural product in the control of Ae. aegypti larvae. In this study, we evaluated the effectiveness of piperine loaded or not into two nanostructured systems (named NS-A and NS-B) prepared by the nanoprecipitation method. The Ae. aegypti larvae were exposed to different concentrations of piperine loaded or not (2 to 16 ppm) and the mortality was investigated after 24, 48, and 72 hours. The nanostructures prepared were spherical in shape with narrow size distribution and great encapsulation efficiency. The lethal concentration 50 (LC50) for non-loaded piperine were 13.015 ppm (24 hours), 8.098 ppm (48 hours), and 7.248 ppm (72 hours). The LC50 values found for NS-A were 35.378 ppm (24 hours), 12.091 ppm (48 hours), and 8.011 ppm (72 hours), whereas the values found for NS-B were 21.267 ppm (24 hours), 12.091 ppm (48 hours), and 8.011 ppm (72 hours). Collectively, these findings suggested that non-loaded piperine caused higher larval mortality in the first hours of exposure while the nanostructured systems promoted the slow release of piperine and thereby increased the larvicidal activity over time. Therefore, loading piperine into nanostructured systems might be an effective tool to improve the larval control of vector Ae. aegypti.
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Affiliation(s)
- Joice Guilherme de Oliveira
- Universidade do Sul de Santa Catarina - UNISUL. Programa de Pós-Graduação em Ciências da Saúde. Avenida José Acácio Moreira, 787, 88704-900, Tubarão, SC, Brazil
| | - Harry Luiz Pilz-Júnior
- Universidade Federal do Rio Grande do Sul - UFRGS. Instituto de Ciências Básicas da Saúde. Departamento de Microbiologia, Parasitologia e Imunologia. Rua Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil.
| | - Alessandra Bittencourt de Lemos
- Universidade Federal do Rio Grande do Sul - UFRGS. Instituto de Ciências Básicas da Saúde. Departamento de Microbiologia, Parasitologia e Imunologia. Rua Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
| | - Felipe Allan da Silva da Costa
- Universidade do Sul de Santa Catarina - UNISUL. Programa de Pós-Graduação em Ciências da Saúde. Avenida José Acácio Moreira, 787, 88704-900, Tubarão, SC, Brazil
| | - Millena Fernandes
- Universidade do Sul de Santa Catarina - UNISUL. Programa de Pós-Graduação em Ciências Ambientais. Avenida José Acácio Moreira, 787, 88704-900, Tubarão, SC, Brazil
| | - Douglas Zelinger Gonçalves
- Universidade do Sul de Santa Catarina - UNISUL. Programa de Pós-Graduação em Ciências da Saúde. Avenida José Acácio Moreira, 787, 88704-900, Tubarão, SC, Brazil
| | - Paula Fassicolo Variza
- Universidade do Sul de Santa Catarina - UNISUL. Programa de Pós-Graduação em Ciências da Saúde. Avenida José Acácio Moreira, 787, 88704-900, Tubarão, SC, Brazil
| | - Fernanda Mendes de Moraes
- Universidade do Sul de Santa Catarina - UNISUL. Programa de Pós-Graduação em Ciências da Saúde. Avenida José Acácio Moreira, 787, 88704-900, Tubarão, SC, Brazil
| | - Fernando Dal Pont Morisso
- Universidade Feevale. Pós-Graduação em Tecnologia de Materiais e Processos Industriais. 93525-075, Novo Hamburgo, RS, Brazil
| | - Rachel Faverzani Magnago
- Universidade do Sul de Santa Catarina - UNISUL. Programa de Pós-Graduação em Ciências Ambientais. Avenida José Acácio Moreira, 787, 88704-900, Tubarão, SC, Brazil
| | - Karine Modolon Zepon
- Universidade do Sul de Santa Catarina - UNISUL. Programa de Pós-Graduação em Ciências Ambientais. Avenida José Acácio Moreira, 787, 88704-900, Tubarão, SC, Brazil
| | - Luiz Alberto Kanis
- Universidade do Sul de Santa Catarina - UNISUL. Programa de Pós-Graduação em Ciências da Saúde. Avenida José Acácio Moreira, 787, 88704-900, Tubarão, SC, Brazil
| | - Onilda Santos da Silva
- Universidade Federal do Rio Grande do Sul - UFRGS. Instituto de Ciências Básicas da Saúde. Departamento de Microbiologia, Parasitologia e Imunologia. Rua Sarmento Leite, 500, 90050-170, Porto Alegre, RS, Brazil
| | - Josiane Somariva Prophiro
- Universidade do Sul de Santa Catarina - UNISUL. Programa de Pós-Graduação em Ciências da Saúde. Avenida José Acácio Moreira, 787, 88704-900, Tubarão, SC, Brazil; Universidade do Sul de Santa Catarina - UNISUL. Programa de Pós-Graduação em Ciências Ambientais. Avenida José Acácio Moreira, 787, 88704-900, Tubarão, SC, Brazil.
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Pereira NRL, Lopes B, Fagundes IV, de Moraes FM, Morisso FDP, Parma GOC, Zepon KM, Magnago RF. Bio-packaging based on cellulose acetate from banana pseudostem and containing Butia catarinensis extracts. Int J Biol Macromol 2022; 194:32-41. [PMID: 34863831 DOI: 10.1016/j.ijbiomac.2021.11.179] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/27/2021] [Accepted: 11/26/2021] [Indexed: 01/10/2023]
Abstract
Banana (Musa acuminata) pseudostem cellulose was extracted and acetylated (CA) to prepare membranes with potential use as bio-packages. The CA membrane was embedded by Butia seed (CA-BS) or Butia pulp (CA-BP) extracts obtained from Butia catarinenses (Butia). The produced CA, CA-BS, and CA-BP membranes were evaluated for their physical-chemical, mechanical, thermal, and antibacterial properties. The process for obtaining the cellulose yielded a material with about 92.17% cellulose (DS = 2.85). The purity, cellulose degree acetylation, and the incorporation of Butia extracts into the membranes were confirmed by FTIR. The CA-BS and CA-BP membranes showed a smaller contact angle and higher swelling ratio than the CA membrane. Furthermore, Butia seed or pulp extracts reduced the elastic modulus and deformation at break compared to the CA membrane. The DSC analysis suggested the compatibility between sections and the CA matrix, whereas the TGA analysis confirmed the thermal stability of the membranes. Moreover, less than 1% of the Butia seed and pulp extracts were put into a food simulant media from the membrane. Finally, the CA-BS and CA-BP membranes could inhibit the growth of Staphylococcus aureus and Escherichia coli on their surface, confirming the potential use of these membranes as bio-packaging for food preservation.
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Affiliation(s)
- Nathan Roberto Lohn Pereira
- Postgraduate program in Environmental Sciences and Chemical Engineering, Instituto Ânima, Universidade do Sul de Santa Catarina, Av. Pedra Branca, 25 - Cidade Universitária, 88137-270 Palhoça, SC, Brazil
| | - Bruna Lopes
- Postgraduate program in Environmental Sciences and Chemical Engineering, Instituto Ânima, Universidade do Sul de Santa Catarina, Av. Pedra Branca, 25 - Cidade Universitária, 88137-270 Palhoça, SC, Brazil
| | - Igor Valezan Fagundes
- Postgraduate program in Environmental Sciences and Chemical Engineering, Instituto Ânima, Universidade do Sul de Santa Catarina, Av. Pedra Branca, 25 - Cidade Universitária, 88137-270 Palhoça, SC, Brazil
| | | | - Fernando Dal Pont Morisso
- Postgraduate in Materials Technology and Industrial Processes, Universidade Feevale, 93525-075 Novo Hamburgo, RS, Brazil
| | - Gabriel Oscar Cremona Parma
- Postgraduate program in Environmental Sciences and Chemical Engineering, Instituto Ânima, Universidade do Sul de Santa Catarina, Av. Pedra Branca, 25 - Cidade Universitária, 88137-270 Palhoça, SC, Brazil
| | - Karine Modolon Zepon
- Postgraduate program in Environmental Sciences and Chemical Engineering, Instituto Ânima, Universidade do Sul de Santa Catarina, Av. Pedra Branca, 25 - Cidade Universitária, 88137-270 Palhoça, SC, Brazil
| | - Rachel Faverzani Magnago
- Postgraduate program in Environmental Sciences and Chemical Engineering, Instituto Ânima, Universidade do Sul de Santa Catarina, Av. Pedra Branca, 25 - Cidade Universitária, 88137-270 Palhoça, SC, Brazil.
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Prá M, Ferreira GK, de Mello AH, Uberti MF, Engel NA, Costa AB, Zepon KM, Francisco GG, Hlavac NRC, Terra SR, Garcez ML, Zaccaron RP, Mendes C, Tschoeke ACP, Kanis LA, Budni J, Silveira PCL, Petronilho F, da Silva Paula MM, Rezin GT. Treatment with isolated gold nanoparticles reverses brain damage caused by obesity. Mater Sci Eng C Mater Biol Appl 2021; 120:111392. [PMID: 33545808 DOI: 10.1016/j.msec.2020.111392] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 07/13/2020] [Accepted: 08/16/2020] [Indexed: 12/30/2022]
Abstract
In this study, we performed two experiments. In the first experiment, the objective was to link gold nanoparticles (GNPs) with sodium diclofenac and/or soy lecithin and to determine their concentration in tissues and their toxicity using hepatic and renal analyzes in mice to evaluate their safety as therapeutic agents in the subsequent treatment of obesity. In the second experiment, we evaluated the effect of GNPs on inflammatory and biochemical parameters in obese mice. In the first experiment, we synthesized and characterized 18 nm GNPs that were administered intraperitoneally in isolation or in association with sodium diclofenac and/or soy lecithin in mice once daily for 1 or 14 days. Twenty-four hours after the single or final administration, the animals were euthanized, following which the tissues were removed for evaluating the concentration of GNPs, and serum samples were collected for hepatic and renal analysis. Hepatic damage was evaluated based on the levels of alanine aminotransferase (ALT), whereas renal damage was evaluated based on creatinine levels. A higher concentration of GNPs was detected in the tissues upon administration for 14 days, and there were no signs of hepatic or renal damage. In the second experiment, the mice were used as animal models of obesity and were fed a high-fat diet (obese group) and control diet (control group). After eight weeks of high-fat diet administration, the mice were treated with saline or with GNPs (average size of 18 nm) at a concentration of 70 mg/L (70 mg/kg) once a day, for 14 days, for 10 weeks. Body weight and food intake were measured frequently. After the experiment ended, the animals were euthanized, serum samples were collected for glucose and lipid profile analysis, the mesenteric fat content was weighed, and the brains were removed for inflammatory and biochemical analysis. In obese mice, although GNP administration did not reduce body and mesenteric fat weight, it reduced food intake. The glucose levels were reversed upon administration of GNPs, whereas the lipid profile was not altered in any of the groups. GNPs exerted a beneficial effect on inflammation and oxidative stress parameters, without reverting mitochondrial dysfunction. Our results indicate that the intraperitoneal administration of GNPs for 14 days results in a significant GNP concentration in adipose tissues, which could be an interesting finding for the treatment of inflammation associated with obesity. Based on the efficacy of GNPs in reducing dietary intake, inflammation, and oxidative stress, they can be considered potential alternative agents for the treatment of obesity.
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Affiliation(s)
- Morgana Prá
- Laboratório de Neurobiologia dos Processos Inflamatórios e Metabólicos, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, SC, Brazil
| | | | - Aline Haas de Mello
- Laboratório de Neurobiologia dos Processos Inflamatórios e Metabólicos, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, SC, Brazil
| | - Marcela Fornari Uberti
- Laboratório de Neurobiologia dos Processos Inflamatórios e Metabólicos, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, SC, Brazil
| | - Nicole Alessandra Engel
- Laboratório de Neurobiologia dos Processos Inflamatórios e Metabólicos, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, SC, Brazil
| | - Ana Beatriz Costa
- Laboratório de Neurobiologia dos Processos Inflamatórios e Metabólicos, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, SC, Brazil
| | - Karine Modolon Zepon
- Laboratório de Tecnologia Farmacêutica, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, SC, Brazil
| | - Gabriela Guzatti Francisco
- Laboratório de Patologia Clínica, Faculdade de Medicina Veterinária, Universidade do Sul de Santa Catarina, Tubarão, SC, Brazil
| | - Nicole Regina Capacchi Hlavac
- Laboratório de Patologia Clínica, Faculdade de Medicina Veterinária, Universidade do Sul de Santa Catarina, Tubarão, SC, Brazil
| | - Silvia Resende Terra
- Laboratório de Patologia Clínica, Faculdade de Medicina Veterinária, Universidade do Sul de Santa Catarina, Tubarão, SC, Brazil
| | - Michelle Lima Garcez
- Programa de Pós-Graduação em Bioquímica, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil
| | - Rubya Pereira Zaccaron
- Laboratório de Fisiopatologia Experimental, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, Criciúma, SC, Brazil
| | - Carolini Mendes
- Laboratório de Fisiopatologia Experimental, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, Criciúma, SC, Brazil
| | | | - Luiz Alberto Kanis
- Laboratório de Tecnologia Farmacêutica, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, SC, Brazil
| | - Josiane Budni
- Laboratório de Neurologia Experimental, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, Criciúma, SC, Brazil
| | - Paulo Cesar Lock Silveira
- Laboratório de Fisiopatologia Experimental, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Extremo Sul Catarinense, Criciúma, SC, Brazil
| | - Fabrícia Petronilho
- Laboratório de Neurobiologia dos Processos Inflamatórios e Metabólicos, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, SC, Brazil
| | - Marcos Marques da Silva Paula
- Departamento de Física, Programa de Pós-Graduação em Ciência e Engenharia de Materiais, Universidade Federal do Amazonas, Manaus, AM, Brazil
| | - Gislaine Tezza Rezin
- Laboratório de Neurobiologia dos Processos Inflamatórios e Metabólicos, Programa de Pós-Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, SC, Brazil
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Zepon KM, Martins MM, Marques MS, Heckler JM, Dal Pont Morisso F, Moreira MG, Ziulkoski AL, Kanis LA. Smart wound dressing based on κ–carrageenan/locust bean gum/cranberry extract for monitoring bacterial infections. Carbohydr Polym 2019; 206:362-370. [DOI: 10.1016/j.carbpol.2018.11.014] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 11/01/2018] [Accepted: 11/07/2018] [Indexed: 01/31/2023]
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Zepon KM, Marques MS, da Silva Paula MM, Morisso FDP, Kanis LA. Facile, green and scalable method to produce carrageenan-based hydrogel containing in situ synthesized AgNPs for application as wound dressing. Int J Biol Macromol 2018; 113:51-58. [DOI: 10.1016/j.ijbiomac.2018.02.096] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 02/04/2018] [Accepted: 02/14/2018] [Indexed: 12/20/2022]
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Marques MS, Zepon KM, Petronilho FC, Soldi V, Kanis LA. Characterization of membranes based on cellulose acetate butyrate/poly(caprolactone)triol/doxycycline and their potential for guided bone regeneration application. Materials Science and Engineering: C 2017; 76:365-373. [DOI: 10.1016/j.msec.2017.03.095] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 12/20/2016] [Accepted: 03/12/2017] [Indexed: 01/22/2023]
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Custódio KM, Oliveira JGD, Moterle D, Zepon KM, Prophiro JS, Kanis LA. A biodegradable device for the controlled release of Piper nigrum (Piperaceae) standardized extract to control Aedes aegypti (Diptera, Culicidae) larvae. Rev Soc Bras Med Trop 2017; 49:687-692. [PMID: 28001214 DOI: 10.1590/0037-8682-0340-2016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 10/14/2016] [Indexed: 12/20/2022] Open
Abstract
INTRODUCTION: The significant increase in dengue, Zika, and chikungunya and the resistance of the Aedes aegypti mosquito to major insecticides emphasize the importance of studying alternatives to control this vector. The aim of this study was to develop a controlled-release device containing Piper nigrum extract and to study its larvicidal activity against Aedes aegypti. METHODS: Piper nigrum extract was produced by maceration, standardized in piperine, and incorporated into cotton threads, which were inserted into hydrogel cylinders manufactured by the extrusion of carrageenan and carob. The piperine content of the extract and thread reservoirs was quantified by chromatography. The release profile from the device was assessed in aqueous medium and the larvicidal and residual activities of the standardized extract as well as of the controlled-release device were examined in Aedes aegypti larvae. RESULTS The standardized extract contained 580mg/g of piperine and an LC50 value of 5.35ppm (24h) and the 3 cm thread reservoirs contained 13.83 ± 1.81mg of piperine. The device showed zero-order release of piperine for 16 days. The P. nigrum extract (25ppm) showed maximum residual larvicidal activity for 10 days, decreasing progressively thereafter. The device had a residual larvicidal activity for up to 37 days. CONCLUSIONS: The device provided controlled release of Piper nigrum extract with residual activity for 37 days. The device is easy to manufacture and may represent an effective alternative for the control of Aedes aegypti larvae in small water containers.
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Affiliation(s)
- Kauê Muller Custódio
- Grupo de Pesquisa em Tecnologia Farmacêutica, Programa de Pós Graduação em Ciências da Saúde - Universidade do Sul de Santa Catarina, Tubarão, Santa Catarina, Brazil
| | - Joice Guilherme de Oliveira
- Grupo de Pesquisa em Imunoparasitologia, Programa de Pós Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, Santa Catarina, Brazil
| | - Diego Moterle
- Grupo de Pesquisa em Tecnologia Farmacêutica, Programa de Pós Graduação em Ciências da Saúde - Universidade do Sul de Santa Catarina, Tubarão, Santa Catarina, Brazil
| | - Karine Modolon Zepon
- Grupo de Pesquisa em Tecnologia Farmacêutica, Programa de Pós Graduação em Ciências da Saúde - Universidade do Sul de Santa Catarina, Tubarão, Santa Catarina, Brazil
| | - Josiane Somariva Prophiro
- Grupo de Pesquisa em Imunoparasitologia, Programa de Pós Graduação em Ciências da Saúde, Universidade do Sul de Santa Catarina, Tubarão, Santa Catarina, Brazil
| | - Luiz Alberto Kanis
- Grupo de Pesquisa em Tecnologia Farmacêutica, Programa de Pós Graduação em Ciências da Saúde - Universidade do Sul de Santa Catarina, Tubarão, Santa Catarina, Brazil
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Zepon KM, Petronilho F, Soldi V, Salmoria GV, Kanis LA. Production and characterization of cornstarch/cellulose acetate/silver sulfadiazine extrudate matrices. Materials Science and Engineering: C 2014; 44:225-33. [DOI: 10.1016/j.msec.2014.08.011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 07/23/2014] [Accepted: 08/01/2014] [Indexed: 12/21/2022]
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Zepon KM, Kanis LA, Soldi V, Salmoria GV. Influência do pH nas propriedades físico-químicas, térmicas e mecânicas de filmes de poli(vinil álcool)/poli(ácido acrílico)/aciclovir. QUIM NOVA 2013. [DOI: 10.1590/s0100-40422013000200003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Kanis LA, Prophiro JS, Vieira EDS, Nascimento MPD, Zepon KM, Kulkamp-Guerreiro IC, Silva OSD. Larvicidal activity of Copaifera sp. (Leguminosae) oleoresin microcapsules against Aedes aegypti (Diptera: Culicidae) larvae. Parasitol Res 2011; 110:1173-8. [PMID: 21850452 DOI: 10.1007/s00436-011-2610-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Accepted: 08/04/2011] [Indexed: 11/24/2022]
Abstract
Studies have demonstrated the potential of Copaifera sp. oleoresin to control Aedes aegypti proliferation. However, the low water solubility is a factor that limits its applicability. Thus, the micro- or nanoencapsulation could be an alternative to allow its use in larval breeding places. The purpose of this study was to evaluate if achievable lethal concentrations could be obtained from Copaifera sp. oleoresin incorporated into polymers (synthetic or natural) and, mainly, if it can be sustained in the residual activity compared to the pure oil when tested against the A. aegypti larvae. Microcapsules were prepared by the process of emulsification/precipitation using the polymers of cellulose acetate (CA) and poly(ethylene-co-methyl acrylate) (PEMA), yielding four types of microcapsules: MicPEMA₁ and MicPEMA₂, and MicCA₁ and MicCA₂. When using only Copaifera sp. oleoresin, the larvicidal activity was observed at concentrations of LC₅₀ = 48 mg/L and LC₉₉ = 149 mg/L. For MicPEMA₁, the LC₅₀ and LC₉₉ were 78 and 389 mg/L, respectively. Using MicPEMA₂, the LC₅₀ was 120 mg/L and LC₉₉ > 500 mg/L. For microcapsules MicCA₁ and MicCA₂, the LC₅₀ and LC₉₉ were 42, 164, 140, and 398 mg/L, respectively. For a dose of 150 mg/L of pure oleoresin, the residual activity remained above 20% for 10 days, while the dose of 400 mg/L remained above 40% for 21 days. The MicPEMA₁ microcapsules showed a loss in residual activity up to the first day; however, it remained in activity above 40% for 17 days. The microcapsules of MicCA₁ showed similar LC₅₀ of pure oil with 150 mg/L.
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Affiliation(s)
- Luiz Alberto Kanis
- Grupo de Pesquisa em Tecnologia Farmacêutica-TECFARMA, Universidade do Sul de Santa Catarina, Av. José Acácio Moreira 787, Dehon 88704-900, Tubarão, SC, Brazil.
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Rechia LM, Morona JBDJ, Zepon KM, Soldi V, Kanis LA. Mechanical properties and total hydroxycinnamic derivative release of starch/glycerol/Melissa officinalis extract films. BRAZ J PHARM SCI 2010. [DOI: 10.1590/s1984-82502010000300012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The aim of this study was to investigate the mechanical properties of starch/glycerol/Melissa officinalis, a topical drug delivery system for labial herpes treatment. Four films were prepared with different concentrations of starch, glycerol, and Melissa officinalis extract. The results revealed that increasing the glycerol concentration in the film reduced elasticity modulus and tensile strength, exhibiting a plasticizing effect. The increase in free volume resulted in increased release of hydroxycinnamic derivatives expressed as rosmarinic acid.
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