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Martins RM, de Siqueira Martins S, Barbosa GLF, Fonseca MJV, Rochette PJ, Moulin VJ, de Freitas LAP, de Freitas LAP. Photoprotective effect of solid lipid nanoparticles of rutin against UVB radiation damage on skin biopsies and tissue-engineered skin. J Microencapsul 2022; 39:668-679. [PMID: 36476253 DOI: 10.1080/02652048.2022.2156631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Solid lipid nanoparticles (SLNs) containing rutin were prepared to enhance their photochemopreventive effect on the skin. SLNs were produced by the hot melt microemulsion technique. Two 3D skin models: ex vivo skin explants and 3D tissue engineering skin were used to evaluate the photochemopreventive effect of topical formulations containing rutin SLNs, against ultraviolet B (UVB) radiation, inducing sunburn cells, caspase-3, cyclobutane pyrimidine dimers, lipid peroxidation, and metalloproteinase formation. The rutin SLNs presented average size of 74.22 ± 2.77 nm, polydispersion index of 0.16 ± 0.04, encapsulation efficiency of 98.90 ± 0.25%, and zeta potential of -53.0 ± 1.61 mV. The rutin SLNs were able to efficiently protect against UVB induced in the analysed parameters in both skin models. Furthermore, the rutin SLNs inhibited lipid peroxidation and metalloproteinase formation. These results support the use of rutin SLNs as skin photochemopreventive agents for topical application to the skin.
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Affiliation(s)
- Rodrigo Molina Martins
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.,Pharmaceutical Sciences Postgraduate Center for Biological and Health Sciences, State University of Paraíba, Paraíba, Brazil.,Center of Higher Education and Development (CESED)-UNIFACISA, Campina Grande, Paraíba, Brazil
| | - Silvia de Siqueira Martins
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | | | - Maria José Vieira Fonseca
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Patrick J Rochette
- Centre de recherche du CHU de Québec, Université Laval, Quebec, Canada.,Department of Ophthalmology, Faculty of Medicine, Université Laval, Quebec, Canada.,Centre de recherche en organogénèse expérimentale de l'Université Laval/LOEX, Quebec, Canada
| | - Véronique J Moulin
- Centre de recherche du CHU de Québec, Université Laval, Quebec, Canada.,Centre de recherche en organogénèse expérimentale de l'Université Laval/LOEX, Quebec, Canada.,Department of Surgery, Faculty of Medicine, Université Laval, Quebec, Canada
| | - Luis Alexandre Pedro de Freitas
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Luis Alexandre Pedro de Freitas
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
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Oteiro AA, Delboni LA, Pedro de Freitas LA, Lara MG. Analysis of interactions between polymeric gel and esophageal mucosae by a multivariate experimental approach. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103413] [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: 10/18/2022]
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Garbuio DC, Zamarioli CM, de Melo MO, Campos PMBGM, de Carvalho EC, de Freitas LAP. Safety of a formulation containing chitosan microparticles with chamomile: blind controlled clinical trial. Rev Lat Am Enfermagem 2018; 26:e3075. [PMID: 30517572 PMCID: PMC6280169 DOI: 10.1590/1518-8345.2648.3075] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 08/26/2018] [Indexed: 01/30/2023] Open
Abstract
OBJECTIVE to evaluate the safety of a topical formulation containing chamomile microparticles coated with chitosan in the skin of healthy participants. METHOD phase I blind, controlled, non-randomized, single-dose clinical trial with control for skin, base formulation, and formulation with microparticles. The variables analyzed were irritation and hydration by the Wilcoxon and Kruskall-Wallis tests. RESULTS the study started with 35 participants with a mean age of 26.3 years. Of these, 30 (85.71%) were female, 29 (82.90%) were white skinned and 32 (91.40%) had no previous pathologies. One participant was removed from the study reporting erythema at the site of application, and four other participants for not attending the last evaluation. In the 30 participants who completed the study, the tested formulation did not cause erythema, peeling, burning, pruritus or pain; there was an improvement in cutaneous hydration in the site of application of the formulation with microparticles. In the evaluation of the barrier function, there was an increase in transepidermal water loss in all sites. CONCLUSION the formulation with chamomile microparticles is safe for topical use, not causing irritation and improving skin hydration over four weeks of use. Its effects on barrier function need further investigation. No. RBR-3h78kz in the Brazilian Registry of Clinical Trials (ReBEC).
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Affiliation(s)
| | - Cristina Mara Zamarioli
- Universidade de São Paulo, Escola de Enfermagem de Ribeirão Preto,
PAHO/WHO Collaborating Centre for Nursing Research Development, Ribeirão Preto, SP,
Brazil
| | - Maísa Oliveira de Melo
- Universidade de São Paulo, Faculdade de Ciências Farmacêuticas de
Ribeirão Preto, Ribeirão Preto, SP, Brazil
| | | | - Emília Campos de Carvalho
- Universidade de São Paulo, Escola de Enfermagem de Ribeirão Preto,
PAHO/WHO Collaborating Centre for Nursing Research Development, Ribeirão Preto, SP,
Brazil
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Teixeira CCC, de Paiva Junior E, de Freitas LAP. Fluidized Bed Hot-Melt Granulation as a Tool to Improve Curcuminoid Solubility. AAPS PharmSciTech 2018; 19:1061-1071. [PMID: 29147872 DOI: 10.1208/s12249-017-0909-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 10/17/2017] [Indexed: 11/30/2022] Open
Abstract
Curcumin is the main bioactive component of Curcuma longa L. and has recently aroused growing interest from the scientific community. Unfortunately, the medicinal properties attributed to curcuminoids are impaired by their low oral bioavailability or low solubility in aqueous solutions. Many strategies have been studied to improve curcumin solubility; however, the preparation of granules using hydrophilic materials has never been attempted. The aim of this work was to develop curcumin granules by fluidized bed hot-melt granulation using the hydrophilic carrier Gelucire® 50:13. A two-level factorial design was used to verify the influence of Gelucire® 50:13 and lactose contents found in the granules on their size, morphology, bulk and tapped densities, flow, moisture content, and water activity. The granules obtained were also evaluated by differential scanning calorimetry, thermogravimetric analysis, X-ray powder diffraction, and infrared spectrometry. The curcumin solubility and dissolution rates in water were determined by liquid chromatography. The best formulation provides an increase of curcumin solubility of 4642-fold and 3.8-fold compared to the physical mixture. The dissolution tests showed a maximum drug release from granules after 45 min of 70% at pH 1.2 and 80% at pH 5.8 and 7.4, while for non-granulated curcumin, the release was below 20% in all pH. The solid-state characterization and solubility measurement showed good stability of granules over 9 months. The results attest that the fluidized bed hot-melt granulation with hydrophilic binders is an attractive and promising alternative to obtain solid forms of curcumin with enhanced bioavailability.
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Pereira SV, Reis RA, Garbuio DC, Freitas LAPD. Dynamic maceration of Matricaria chamomilla inflorescences: optimal conditions for flavonoids and antioxidant activity. Revista Brasileira de Farmacognosia 2018. [DOI: 10.1016/j.bjp.2017.11.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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da Silva LS, Catalão CHR, Felippotti TT, de Oliveira- Pelegrin GR, Petenusci S, de Freitas LAP, Rocha MJA. Curcumin suppresses inflammatory cytokines and heat shock protein 70 release and improves metabolic parameters during experimental sepsis. Pharm Biol 2017; 55:269-276. [PMID: 27927067 PMCID: PMC6130593 DOI: 10.1080/13880209.2016.1260598] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 11/09/2016] [Indexed: 05/31/2023]
Abstract
CONTEXT Curcumin has been reported to have anti-inflammatory, antioxidant and hypoglycaemic properties, besides reducing mortality in sepsis. OBJECTIVE This study evaluates the biological activities of a curcumin dispersion formulated by spray-drying in experimental sepsis. MATERIALS AND METHODS Male Wistar rats were subjected to sepsis by caecal ligation and puncture (CLP), controls were sham operated. The animals were treated with curcumin dispersion (100 mg/kg, p.o.) or water for 7 days prior to CLP and at 2 h after surgery. One group was used to analyze curcumin absorption through HPLC; another had the survival rate assessed during 48 h; and from a third group, blood was collected by decapitation to analyze metabolic and inflammatory parameters. RESULTS The plasma curcumin levels reached 2.5 ng/mL at 4 h, dropped significantly (p < 0.001) at 6 h (1.2 ng/mL), and were undetectable at 24 h in both groups. Curcumin temporarily increased the survival rate of the septic rats by 20%. Moreover, it attenuated glycaemia (p < 0.05) and volemia (p < 0.05) alterations typically observed during sepsis, and decreased the levels of the proinflammatory cytokines IL-1β and IL-6 in plasma (p < 0.001) and peritoneal lavage fluid (p < 0.05) of septic rats. Serum HSP70 levels were decreased (p < 0.01) at 24 h after CLP. DISCUSSION AND CONCLUSION Our results show that the curcumin dispersion dose employed was not detrimental to the septic rats. In fact, it temporarily increased their survival rate, improved important metabolic parameters, reduced proinflammatory cytokines and HSP70 production.
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Affiliation(s)
- Letycia Silvano da Silva
- Department of Morphology, Physiology and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Carlos Henrique Rocha Catalão
- Department of Neuroscience and Behavior Sciences, Ribeirão Preto Medical School University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Tatiana Tocchini Felippotti
- Department of Morphology, Physiology and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | | | - Sérgio Petenusci
- Department of Morphology, Physiology and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Luis Alexandre Pedro de Freitas
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Maria José Alves Rocha
- Department of Morphology, Physiology and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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Souza C, de Freitas LAP, Maia Campos PMBG. Topical Formulation Containing Beeswax-Based Nanoparticles Improved In Vivo Skin Barrier Function. AAPS PharmSciTech 2017; 18:2505-2516. [PMID: 28213845 DOI: 10.1208/s12249-017-0737-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 02/01/2017] [Indexed: 11/30/2022] Open
Abstract
Lipid nanoparticles have shown many advantages for treatment/prevention of skin disorders with damaged skin barrier function. Beeswax is a favorable candidate for the development of nanosystems in the cosmetic and dermatological fields because of its advantages for the development of products for topical application. In the present study, beeswax-based nanoparticles (BNs) were prepared using the hot melt microemulsion technique and incorporated to a gel-cream formulation. The formulation was subsequently evaluated for its rheological stability and effect on stratum corneum water content (SCWC) and transepidermal water loss (TEWL) using in vivo biophysical techniques. BNs resulted in mean particle size of 95.72 ± 9.63 nm and zeta potential of -9.85 ± 0.57 mV. BN-loaded formulation showed shear thinning behavior, well adjusted by the Herschel-Bulkley model, and a small thixotropy index that were stable for 28 days at different temperatures. BN-loaded formulation was also able to simultaneously decrease the TEWL and increase the SCWC values 28 days after treatment. In conclusion, the novel beeswax-based nanoparticles showed potential for barrier recovery and open the perspective for its commercial use as a novel natural active as yet unexplored in the field of dermatology and cosmetics for treatment of skin diseases with damaged skin barrier function.
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Hamin Neto YAA, Coitinho LB, de Freitas LAP, Cabral H. Box-Behnken analysis and storage of spray-dried collagenolytic proteases from Myceliophthora thermophila submerged bioprocess. Prep Biochem Biotechnol 2017; 47:473-480. [PMID: 28278111 DOI: 10.1080/10826068.2017.1292289] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Enzymes do not have long-term storage stability in soluble forms, thus drying methods could minimize the loss of enzymatic activity, the spray dryer removes water under high temperatures and little time. The aims of this study were to improve the stability of enzymatic extract from Myceliophthora thermophila for potential applications in industry and to evaluate the best conditions to remove the water by spray drying technique. The parameters were tested according to Box-Behnken and evaluated by analysis of variance (ANOVA), all the parameters measured were found to influence the final enzyme activity and spray drying process yield ranged from 38.65 to 63.75%. Enzyme powders showed increased storage stability than extract and maintained about 100% of collagenolytic activity after 180 days of storage at 30°C. The results showed that the microbial enzymes maintained activity during the spray drying process and were stable during long-term storage; these are promising characteristics for industrial applications.
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Affiliation(s)
- Youssef Ali Abou Hamin Neto
- a Faculdade de Ciências Farmacêuticas de Ribeirão Preto , Universidade de São Paulo , Ribeirão Preto , SP , Brazil
| | - Luciana Barbosa Coitinho
- a Faculdade de Ciências Farmacêuticas de Ribeirão Preto , Universidade de São Paulo , Ribeirão Preto , SP , Brazil
| | | | - Hamilton Cabral
- a Faculdade de Ciências Farmacêuticas de Ribeirão Preto , Universidade de São Paulo , Ribeirão Preto , SP , Brazil
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Correia Teixeira CC, de Freitas Cabral TP, Barreto de Sousa JP, de Pádua Teixeira S, Kenupp Bastos J, Pedro de Freitas LA. Study of Quality Assurance For Peumus Boldus M Products By Botanic Profiling, Extraction Optimization, HPLC Quantification And Antioxidant Assay. ACTA ACUST UNITED AC 2016. [DOI: 10.5530/pj.2016.3.16] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Pereira SV, Colombo FB, de Freitas LAP. Ultrasound influence on the solubility of solid dispersions prepared for a poorly soluble drug. Ultrason Sonochem 2016; 29:461-469. [PMID: 26548840 DOI: 10.1016/j.ultsonch.2015.10.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Revised: 10/27/2015] [Accepted: 10/30/2015] [Indexed: 06/05/2023]
Abstract
Solid dispersions have been successfully used to enhance the solubility of several poorly water soluble drugs. Solid dispersions are produced by melting hydrophilic carriers and mixing in the poorly water soluble drug. Supersaturation is obtained by quickly cooling the mixture until it solidifies, thereby entrapping the drug. The effects of using ultrasound to homogenize the molten carrier and drug mixture were studied. In particular, the increase in drug solubility for the resulting solid dispersions was analyzed. Piroxicam, which has very low water solubility, was used as a model drug. A full factorial design was used to analyze how sonication parameters affected the solubility and in vitro release of the drug. The results show that the use of ultrasound can significantly increase the solubility and dissolution rate of the piroxicam solid dispersion. Pure piroxicam presented a solubility of 13.3 μg/mL. A maximum fourfold increase in solubility, reaching 53.8 μg/mL, was observed for a solid dispersion sonicated at 19 kHz for 10 min and 475 W. The in vitro dissolution rate test showed the sonicated solid dispersion reached a maximum rate of 18%/min, a sixfold increase over the piroxicam rate of 2.9%/min. Further solid state characterization by thermal, X-ray diffraction and Fourier transform infrared analyses also showed that the sonication process, in the described conditions, did not adversely alter the drug or significantly change its polymorphic form. Ultrasound is therefore an interesting technique to homogenize drug/carrier mixtures with the objective of increasing the solubility of drugs with poor water solubility.
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Affiliation(s)
- Simone Vieira Pereira
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Núcleo de Pesquisa em Produtos Naturais e Sintéticos - Universidade de São Paulo, Via do Café s/n, 14040-903 Ribeirão Preto, SP, Brazil
| | | | - Luis Alexandre Pedro de Freitas
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Núcleo de Pesquisa em Produtos Naturais e Sintéticos - Universidade de São Paulo, Via do Café s/n, 14040-903 Ribeirão Preto, SP, Brazil.
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Mendonça LM, Machado CDS, Teixeira CCC, Freitas LAPD, Bianchi MLP, Antunes LMG. Comparative study of curcumin and curcumin formulated in a solid dispersion: Evaluation of their antigenotoxic effects. Genet Mol Biol 2015; 38:490-8. [PMID: 26537603 PMCID: PMC4763312 DOI: 10.1590/s1415-475738420150046] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 05/28/2015] [Indexed: 01/20/2023] Open
Abstract
Curcumin (CMN) is the principal active component derived from the rhizome of
Curcuma longa (Curcuma longa L.). It is a
liposoluble polyphenolic compound that possesses great therapeutic potential. Its
clinical application is, however, limited by the low concentrations detected
following oral administration. One key strategy for improving the solubility and
bioavailability of poorly water-soluble drugs is solid dispersion, though it is not
known whether this technique might influence the pharmacological effects of CMN.
Thus, in this study, we aimed to evaluate the antioxidant and antigenotoxic effects
of CMN formulated in a solid dispersion (CMN SD) compared to unmodified CMN delivered
to Wistar rats. Cisplatin (cDDP) was used as the damage-inducing agent in these
evaluations. The comet assay results showed that CMN SD was not able to reduce the
formation of cDDP-DNA crosslinks, but it decreased the formation of micronuclei
induced by cDDP and attenuated cDDP-induced oxidative stress. Furthermore, at a dose
of 50 mg/kg b.w. both CMN SD and unmodified CMN increased the expression of
Tp53 mRNA. Our results showed that CMN SD did not alter the
antigenotoxic effects observed for unmodified CMN and showed effects similar to those
of unmodified CMN for all of the parameters evaluated. In conclusion, CMN SD
maintained the protective effects of unmodified CMN with the advantage of being
chemically water soluble, with maximization of absorption in the gastrointestinal
tract. Thus, the optimization of the physical and chemical properties of CMN SD may
increase the potential for the therapeutic use of curcumin.
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Affiliation(s)
- Leonardo Meneghin Mendonça
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Carla da Silva Machado
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Cristiane Cardoso Correia Teixeira
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Luis Alexandre Pedro de Freitas
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Maria Lourdes Pires Bianchi
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Lusânia Maria Greggi Antunes
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
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de Oliveira APM, Cunha TA, Serpa RC, Taveira SF, Lima EM, Almeida Diniz DG, de Freitas LAP, Marreto RN. Improvement of enalapril maleate chemical stability by high shear melting granulation. Pharm Dev Technol 2014; 20:1002-1008. [DOI: 10.3109/10837450.2014.959178] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Mendonça LM, da Silva Machado C, Teixeira CCC, de Freitas LAP, Bianchi MDLP, Antunes LMG. Curcumin reduces cisplatin-induced neurotoxicity in NGF-differentiated PC12 cells. Neurotoxicology 2012; 34:205-11. [PMID: 23036615 DOI: 10.1016/j.neuro.2012.09.011] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2012] [Revised: 09/18/2012] [Accepted: 09/25/2012] [Indexed: 10/27/2022]
Abstract
The potential neuroprotective benefits of curcumin against cisplatin neurotoxicity were investigated. Curcumin is a polyphenol derived from the rhizome of Curcuma longa whose pharmacological effects include antioxidant, anti-inflammatory and anti-cancer properties. Cisplatin is a potent chemotherapeutic drug with activity against a wide variety of tumors, although it has notorious side effects. Cisplatin neurotoxicity is clinically evident in patients that have undergone a full course of chemotherapy and develop a peripheral neuropathy that may affect the treatment regimen and the patient's qualify of life. In this study, we examined whether curcumin can protect against cisplatin neurite outgrowth inhibition in PC12 cells, which is an indicator of the protective potential against neuropathy. We also investigated whether curcumin affects cisplatin effectiveness by analyzing the modulation of p53 gene expression and its effect on cisplatin cytotoxicity in HepG2 tumor cells. Non-cytotoxic concentrations of curcumin reduced in vitro neurotoxicity of cisplatin in PC12 cells. The treatment of PC12 cells with cisplatin (10μg/mL) significantly reduced neurite outgrowth. The tested concentration of curcumin (1.0 and 10μg/mL) did not result in neurite toxicity but nevertheless diminished cisplatin-induced inhibition of neurite outgrowth by up to 50% (p<0.05). Our results indicate that curcumin does not compromise cisplatin's anticancer activity. Curcumin neither suppressed p53 mRNA transcription nor protected tumor cells against cisplatin cytotoxicity. These results indicate that curcumin may reduce cisplatin-induced neurotoxicity, and clinical studies should potentially be considered.
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Affiliation(s)
- Leonardo Meneghin Mendonça
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
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Borges KB, Pupo MT, de Freitas LAP, Bonato PS. Box-Behnken design for the optimization of an enantioselective method for the simultaneous analysis of propranolol and 4-hydroxypropranolol by CE. Electrophoresis 2010; 30:2874-81. [PMID: 19691051 DOI: 10.1002/elps.200800821] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
An experimental design optimization (Box-Behnken design, BBD) was used to develop a CE method for the simultaneous resolution of propranolol (Prop) and 4-hydroxypropranolol enantiomers and acetaminophen (internal standard). The method was optimized using an uncoated fused silica capillary, carboxymethyl-beta-cyclodextrin (CM-beta-CD) as chiral selector and triethylamine/phosphoric acid buffer in alkaline conditions. A BBD for four factors was selected to observe the effects of buffer electrolyte concentration, pH, CM-beta-CD concentration and voltage on separation responses. Each factor was studied at three levels: high, central and low, and three center points were added. The buffer electrolyte concentration ranged from 25 to 75 mM, the pH ranged from 8 to 9, the CM-beta-CD concentration ranged from 3.5 to 4.5% w/v, and the applied run voltage ranged from 14 to 20 kV. The responses evaluated were resolution and migration time for the last peak. The obtained responses were processed by Minitab to evaluate the significance of the effects and to find the optimum analysis conditions. The best results were obtained using 4% w/v CM-beta-CD in 25 mM triethylamine/H3PO4 buffer at pH 9 as running electrolyte and 17 kV of voltage. Resolution values of 1.98 and 1.95 were obtained for Prop and 4-hydroxypropranolol enantiomers, respectively. The total analysis time was around of 15 min. The BBD showed to be an adequate design for the development of a CE method, resulting in a rapid and efficient optimization of the pH and concentration of the buffer, cyclodextrin concentration and applied voltage.
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Affiliation(s)
- Keyller Bastos Borges
- Department of Physics and Chemistry, Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
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