101
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Jug M, Mennini N, Melani F, Maestrelli F, Mura P. Phase solubility, 1H NMR and molecular modelling studies of bupivacaine hydrochloride complexation with different cyclodextrin derivates. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.10.046] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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102
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Fathi-Azarbayjani A, Qun L, Chan YW, Chan SY. Novel vitamin and gold-loaded nanofiber facial mask for topical delivery. AAPS PharmSciTech 2010; 11:1164-70. [PMID: 20661676 PMCID: PMC2974145 DOI: 10.1208/s12249-010-9475-z] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2009] [Accepted: 06/22/2010] [Indexed: 11/30/2022] Open
Abstract
L-ascorbic acid has been widely used in cosmetic and dermatological products because of its ability to scavenge free radicals and destroy oxidizing agents. However, it is chemically unstable and can easily be oxidized. The current cosmetic facial masks available in the market are pre-moistened, which means that the aqueous fluid content of the mask may oxidize some of the unstable active ingredients such as ascorbic acid. This work presents an anti-wrinkle nanofiber face mask containing ascorbic acid, retinoic acid, gold nanoparticles, and collagen. This novel face mask will only be wetted when applied to the skin, thus enhancing product stability. Once moistened, the content of the mask will gradually dissolve and release the active ingredients and ensure maximum skin penetration. The high surface area-to-volume ratio of the nanofiber mask will ensure maximum contact with the skin surface and help to enhance the skin permeation to restore its healthy appearance. Electrospun fiber mats may provide an attractive alternative to the commercial facial cotton masks.
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Affiliation(s)
- Anahita Fathi-Azarbayjani
- />Department of Pharmacy, National University of Singapore, Block S4, level 2, Science Drive 4, 117543 Singapore, Singapore
| | - Lin Qun
- />Department of Pharmacy, National University of Singapore, Block S4, level 2, Science Drive 4, 117543 Singapore, Singapore
| | - Yew Weng Chan
- />Department of Anesthesiology, Singapore General Hospital, 169608 Singapore, Singapore
| | - Sui Yung Chan
- />Department of Pharmacy, National University of Singapore, Block S4, level 2, Science Drive 4, 117543 Singapore, Singapore
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103
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Peng M, Liu Y, Zhang H, Cui Y, Zhai G, Chen C. Photostability Study of Doxorubicin Aqueous Solution Enhanced by Inclusion Interaction between Doxorubicin and Hydroxypropyl-β-cyclodextrin. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.201090223] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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104
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Silva DL, Couto Tavares E, Souza Conegero L, Fátima Â, Pilli RA, Fernandes SA. NMR studies of inclusion complexation of the pyrrolizidine alkaloid retronecine and p-sulfonic acid calix[6]arene. J INCL PHENOM MACRO 2010. [DOI: 10.1007/s10847-010-9825-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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106
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Grillo R, de Melo NFS, de Araújo DR, de Paula E, Rosa AH, Fraceto LF. Polymeric alginate nanoparticles containing the local anesthetic bupivacaine. J Drug Target 2010; 18:688-99. [DOI: 10.3109/10611861003649738] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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107
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de Araujo DR, Cereda CMS, Brunetto GB, Vomero VU, Pierucci A, Neto HS, de Oliveira ALR, Fraceto LF, Braga ADFDA, de Paula E. Pharmacological and local toxicity studies of a liposomal formulation for the novel local anaesthetic ropivacaine. J Pharm Pharmacol 2010. [DOI: 10.1211/jpp.60.11.0005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Abstract
This study reports an investigation of the pharmacological activity, cytotoxicity and local effects of a liposomal formulation of the novel local anaesthetic ropivacaine (RVC) compared with its plain solution. RVC was encapsulated into large unilamellar vesicles (LUVs) composed of egg phosphatidylcholine, cholesterol and α-tocopherol (4:3:0.07, mole%). Particle size, partition coefficient determination and in-vitro release studies were used to characterize the encapsulation process. Cytotoxicity was evaluated by the tetrazolium reduction test using sciatic nerve Schwann cells in culture. Local anaesthetic activity was assessed by mouse sciatic and rat infraorbital nerve blockades. Histological analysis was performed to verify the myotoxic effects evoked by RVC formulations. Plain (RVCPLAIN) and liposomal RVC (RVCLUV) samples were tested at 0.125%, 0.25% and 0.5% concentrations. Vesicle size distribution showed liposomal populations of 370 and 130 nm (85 and 15%, respectively), without changes after RVC encapsulation. The partition coefficient value was 132 ± 26 and in-vitro release assays revealed a decrease in RVC release rate (1.5 fold, P < 0.001) from liposomes. RVCLUV presented reduced cytotoxicity (P < 0.001) when compared with RVCPLAIN. Treatment with RVCLUV increased the duration (P < 0.001) and intensity of the analgesic effects either on sciatic nerve blockade (1.4–1.6 fold) and infraorbital nerve blockade tests (1.5 fold), in relation to RVCPLAIN. Regarding histological analysis, no morphological tissue changes were detected in the area of injection and sparse inflammatory cells were observed in only one of the animals treated with RVCPLAIN or RVCluv at 0.5%. Despite the differences between these preclinical studies and clinical conditions, we suggest RVCLUV as a potential new formulation, since RVC is a new and safe local anaesthetic agent.
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Affiliation(s)
- Daniele Ribeiro de Araujo
- Department of Biochemistry, Institute of Biology, State University of Campinas - UNICAMP, Campinas, SP, Brazil
| | - Cintia Maria Saia Cereda
- Department of Biochemistry, Institute of Biology, State University of Campinas - UNICAMP, Campinas, SP, Brazil
| | - Giovanna Bruschini Brunetto
- Department of Biochemistry, Institute of Biology, State University of Campinas - UNICAMP, Campinas, SP, Brazil
| | - Viviane Urbini Vomero
- Department of Anatomy, Institute of Biology, State University of Campinas - UNICAMP, Campinas, SP, Brazil
| | - Amauri Pierucci
- Department of Anatomy, Institute of Biology, State University of Campinas - UNICAMP, Campinas, SP, Brazil
| | - Humberto Santo Neto
- Department of Anatomy, Institute of Biology, State University of Campinas - UNICAMP, Campinas, SP, Brazil
| | | | - Leonardo Fernandes Fraceto
- Department of Biochemistry, Institute of Biology, State University of Campinas - UNICAMP, Campinas, SP, Brazil
- Department of Environmental Engineering, State University of São Paulo - UNESP, Sorocaba, SP, Brazil
| | | | - Eneida de Paula
- Department of Biochemistry, Institute of Biology, State University of Campinas - UNICAMP, Campinas, SP, Brazil
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108
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Fathi-Azarbayjani A, Chan SY. Single and Multi-Layered Nanofibers for Rapid and Controlled Drug Delivery. Chem Pharm Bull (Tokyo) 2010; 58:143-6. [DOI: 10.1248/cpb.58.143] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | - Sui Yung Chan
- Department of Pharmacy, National University of Singapore
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110
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Ansari MT, Iqbal I, Sunderland VB. Dihydroartemisinin-cyclodextrin complexation: Solubility and stability. Arch Pharm Res 2009; 32:155-65. [DOI: 10.1007/s12272-009-1130-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2008] [Revised: 12/30/2008] [Accepted: 12/31/2008] [Indexed: 10/21/2022]
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111
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Grillo R, de Melo NF, Moraes CM, de Lima R, Menezes CM, Ferreira EI, Rosa AH, Fraceto LF. Study of the interaction between hydroxymethylnitrofurazone and 2-hydroxypropyl-β-cyclodextrin. J Pharm Biomed Anal 2008; 47:295-302. [DOI: 10.1016/j.jpba.2008.01.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2007] [Revised: 01/08/2008] [Accepted: 01/08/2008] [Indexed: 11/29/2022]
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112
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Hydroxymethylnitrofurazone:dimethyl-beta-cyclodextrin inclusion complex: a physical-chemistry characterization. J Biol Phys 2007; 33:445-53. [PMID: 19669530 DOI: 10.1007/s10867-008-9054-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2007] [Accepted: 01/03/2008] [Indexed: 10/22/2022] Open
Abstract
Hydroxymethylnitrofurazone (NFOH) is active against Trypanosoma cruzi; however, its low solubility and high toxicity precludes its current use in treatment of parasitosis. Cyclodextrin can be used as a drug carrier system, as it is able to form inclusion (host-guest) complexes with a wide variety of organic (guest) molecules. Several reports have shown the interesting use of modified beta-cyclodextrins in pharmaceutical formulation, to improve the bioavailability of drugs and to decrease their toxicity. The aim of this work was to characterize inclusion complexes formed between NFOH and dimethyl-beta-cyclodextrin (DM-beta-CD) by complexation/release kinetics and solubility isotherm experiments using ultraviolet (UV)-visible spectrophotometry and by the measurement of the dynamics information obtained from T(1) relaxation times and diffusion (DOSY) experiments using nuclear magnetic resonance (NMR) spectroscopy. The complex was prepared at different NFOH and DM-beta-CD molar ratios. The UV-visible measurements were recorded in a spectrophotometer, and NMR experiments were recorded at 20 degrees C on a NMR spectrometer (Varian Inova) operating at 500 MHz. Longitudinal relaxation times were obtained by the conventional inversion-recovery method and the DOSY experiments were carried out using the BPPSTE sequence. The kinetics of complexation revealed that 30 h is enough for stabilization of the NFOH absorbance in presence of cyclodextrin. Solubility isotherm studies show a favorable complexation and increase in solubility when NFOH interacts with cyclodextrin. The analysis of the NMR-derived diffusion coefficients and T(1) relaxation times shows that in the presence of DM-beta-CD, NFOH decreases its mobility in solution, indicating that this antichagasic compound interacts with the cyclodextrin cavity. The release kinetics assays showed that NFOH changes its release profile when in the presence of cyclodextrin due to complexation. This study was focused on the physicochemical characterization of drug-delivery formulations that may serve as potentially new therapeutic options for the treatment of Chagas' disease.
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