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do Nascimento JR, de Matos Monteiro Lira BS, do Nascimento MO, Lopes GLN, Ferreira GM, de Souza Nunes GC, Gonçalves RS, Carvalho ALM, Vilegas W, da Rocha CQ. Innovative Microemulsion Loaded with Unusual Dimeric Flavonoids from Fridericia platyphylla (Cham.) L.G. Lohmann Roots. AAPS PharmSciTech 2023; 24:212. [PMID: 37848719 DOI: 10.1208/s12249-023-02655-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 09/13/2023] [Indexed: 10/19/2023] Open
Abstract
Fridericia platyphylla (Cham.) L.G. Lohmann is a species native to the Brazilian cerrado, with promising bioactivity. The organic fraction of the roots is rich in unusual dimeric flavonoids, reported as potential candidates for cancer treatment. The exploration of these flavonoids is very important, considering their diverse biological activities and the need for innovative therapeutic options. This work aimed to develop and characterize a microemulsion loaded with a non-polar fraction (DCM). The constituents were chosen, and the pseudo-ternary diagram was constructed to determine the region of microemulsion formation. The microemulsions blank (ME), with 3% (ME3) and 5% (ME5) of fraction DCM, were characterized in terms of droplet size, zeta potential, and polydispersity index. Both MEs showed particle sizes <100 nm; only ME3 exhibited better values for polydispersity index and zeta potential and was therefore selected for further study. The organoleptic and physicochemical characteristics were evaluated, revealing limpidity and transparency typical of these microstructures, physiologically acceptable pH, refractive index of 1.42±0.01, and density of 1.017 g/cm3±0.01. The stability tests showed good stability profiles even after exposure to extreme thermal conditions, with minimal changes in pH and the content of the incorporated fraction. The in vitro release study demonstrated that ME3 enabled the controlled release of the fraction, with a cumulative amount released over 60% within 6 h. Furthermore, fraction DCM and ME3 exhibited no toxicity in Tenebrio molitor larvae. The developed microemulsion exhibited excellent properties, so this study represents the first successful attempt to develop a formulation that incorporates the dimeric flavonoid fraction.
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Affiliation(s)
| | | | | | | | - Glaucio Monteiro Ferreira
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | | | | | | | - Wagner Vilegas
- Institut of Biosciences, Coastal Campus of São Vicente, Paulista State University-UNESP, São Vicente, São Paulo, Brazil
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Razzaq FA, Asif M, Asghar S, Iqbal MS, Khan IU, Khan SUD, Irfan M, Syed HK, Khames A, Mahmood H, Ibrahim AY, El Sisi AM. Glimepiride-Loaded Nanoemulgel; Development, In Vitro Characterization, Ex Vivo Permeation and In Vivo Antidiabetic Evaluation. Cells 2021; 10:cells10092404. [PMID: 34572054 PMCID: PMC8467883 DOI: 10.3390/cells10092404] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 08/04/2021] [Accepted: 08/11/2021] [Indexed: 11/16/2022] Open
Abstract
Glimepiride (GMP), an oral hypoglycemic agent is extensively employed in the treatment of type 2 diabetes. Transdermal delivery of GMP has been widely investigated as a promising alternative to an oral approach but the delivery of GMP is hindered owing to its low solubility and permeation. The present study was designed to formulate topical nanoemulgel GMP system and previously reported solubility enhanced glimepiride (GMP/βCD/GEL-44/16) in combination with anti-diabetic oil to enhance the hypoglycemic effect. Nanoemulsions were developed using clove oil, Tween-80, and PEG-400 and were gelled using xanthan gum (3%, w/w) to achieve the final nanoemulgel formulations. All of the formulations were evaluated in terms of particle size, zeta potential, pH, conductivity, viscosity, and in vitro skin permeation studies. In vivo hypoglycemic activity of the optimized nanoemulgel formulations was evaluated using a streptozocin-induced diabetes model. It was found that a synergistic combination of GMP with clove oil improved the overall drug permeation across the skin membrane and the hypoglycemic activity of GMP. The results showed that GMP/βCD/GEL-44/16-loaded nanoemulgel enhanced the in vitro skin permeation and improved the hypoglycemic activity in comparison with pure and marketed GMP. It is suggested that topical nano emulsion-based GMP gel and GMP/βCD/GEL-44/16 could be an effective alternative for oral therapy in the treatment of diabetes.
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Affiliation(s)
- Fizza Abdul Razzaq
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad 38000, Pakistan; (F.A.R.); (S.A.); (I.U.K.); (M.I.); (H.M.)
| | - Muhammad Asif
- Department of Pharmacology, Faculty of Pharmacy, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;
| | - Sajid Asghar
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad 38000, Pakistan; (F.A.R.); (S.A.); (I.U.K.); (M.I.); (H.M.)
| | - Muhammad Shahid Iqbal
- Department of Clinical Pharmacy, College of Pharmacy, Prince Sattam bin Abdulaziz University, Al-kharj 11942, Saudi Arabia;
| | - Ikram Ullah Khan
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad 38000, Pakistan; (F.A.R.); (S.A.); (I.U.K.); (M.I.); (H.M.)
| | - Salah-Ud-Din Khan
- Department of Biochemistry, College of Medicine, Imam Mohammad ibn Saud Islamic University (IMSIU), Riyadh 11432, Saudi Arabia;
| | - Muhammad Irfan
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad 38000, Pakistan; (F.A.R.); (S.A.); (I.U.K.); (M.I.); (H.M.)
| | - Haroon Khalid Syed
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad 38000, Pakistan; (F.A.R.); (S.A.); (I.U.K.); (M.I.); (H.M.)
- Correspondence: or
| | - Ahmed Khames
- Department of Pharmaceutics and Industrial Pharmacy, College of Pharmacy, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Hira Mahmood
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad 38000, Pakistan; (F.A.R.); (S.A.); (I.U.K.); (M.I.); (H.M.)
| | - Asim Y. Ibrahim
- Faculty of Pharmacy, Omdurman Islamic University, P.O. Box 382, Omdurman 14415, Sudan;
| | - Amani M. El Sisi
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Beni-Suef University, Beni-Suef 62521, Egypt;
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Bashir M, Ahmad J, Asif M, Khan SUD, Irfan M, Y Ibrahim A, Asghar S, Khan IU, Iqbal MS, Haseeb A, Khalid SH, As Abourehab M. Nanoemulgel, an Innovative Carrier for Diflunisal Topical Delivery with Profound Anti-Inflammatory Effect: in vitro and in vivo Evaluation. Int J Nanomedicine 2021; 16:1457-1472. [PMID: 33654396 PMCID: PMC7910103 DOI: 10.2147/ijn.s294653] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 01/28/2021] [Indexed: 11/25/2022] Open
Abstract
Purpose Rheumatoid arthritis is an autoimmune disorder that directly affects joints. However, other body organs including heart, eyes, skin, blood vessels and lungs may also be affected. The purpose of this study was to design and evaluate a nanoemulgel formulation of diflunisal (DIF) and solubility enhanced diflunisal (DIF-IC) for enhanced topical anti-inflammatory activity. Methodology Nanoemulsion formulations of both DIF and DIF-IC were prepared and incorporated in three different gelling agents, namely carboxymethylcellulose sodium (CMC-Na), sodium alginate (Na-ALG) and xanthan gum (XG). All the formulations were evaluated in term of particle size, pH, conductivity, viscosity, zeta potential and in vitro drug release. The formulation 2 (NE2) of both DIF and DIF-IC which expressed optimum release and satisfactory physicochemical properties was incorporated with gelling agents to produce final nanoemulgel formulations. The optimized nanoemulgel formulation was subjected to three different in vivo anti-inflammatory models including carrageenan-induced paw edema model, histamine-induced paw edema model and formalin-induced paw edema model. Results DIF-IC-loaded nanoemulgel formulations yielded significantly enhanced in vitro skin permeation than DIF-loaded nanoemulgel. The nanoemulgel formulation of DIF-IC formulated with XG produced improved in vivo anti-inflammatory activity. Conclusion It was recommended that DIF-IC-based nanoemulgel formulation prepared with XG could be a better option for effective topical treatment of inflammatory conditions.
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Affiliation(s)
- Mehreen Bashir
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Junaid Ahmad
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Muhammad Asif
- Department of Pharmacology, Faculty of Pharmacy, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Salah-Ud-Din Khan
- Department of Biochemistry, College of Medicine, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
| | - Muhammad Irfan
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Asim Y Ibrahim
- Faculty of Pharmacy, Omdurman Islamic University, Omdurman, Sudan
| | - Sajid Asghar
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Ikram Ullah Khan
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Muhammad Shahid Iqbal
- Department of Clinical Pharmacy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Alkharj, Saudi Arabia
| | - Abdul Haseeb
- Department of Clinical Pharmacy, College of Pharmacy, Umm Al-Qura University, Makkah, 21955, Saudi Arabia
| | - Syed Haroon Khalid
- Department of Pharmaceutics, Faculty of Pharmaceutical Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Mohammed As Abourehab
- Department of Pharmaceutics, Faculty of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia.,Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Minia University, Minia, Egypt
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Microemulsion systems: from the design and architecture to the building of a new delivery system for multiple-route drug delivery. Drug Deliv Transl Res 2020; 11:2108-2133. [PMID: 33164165 DOI: 10.1007/s13346-020-00872-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/15/2020] [Indexed: 02/04/2023]
Abstract
Poorly soluble active pharmaceutical ingredients (APIs) create major problems in drug dosage form formulation resulting in significant delays in drug pharmaceutical screening, impairing the drug dosage form production. Aiming to minimize the use of excipients for increasing drug apparent solubility and, as a result, its bioavailability, exploration of innovative approaches is an earnest need. Microemulsion is an alternative drug delivery system that emerged as a valuable tool to achieve safe formulations for insoluble compounds and to improve their biopharmaceutical properties and pharmacokinetics. This review aims to present the state of the art of microemulsion systems, bringing an overview about their origin and how they can be properly produced and thoroughly characterized by different approaches. Furthermore, comments on regulatory issues regarding stability assessment and toxicity evaluation are discussed. The review concludes with a current opinion on microemulsion systems. The overall objective of this work was to describe all the potentialities of microemulsion systems as a drug carrier for therapeutic purposes, highlighting the unique features of this nanotechnological platform. Display Image.
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Banerjee S, Roy S, Datta A, Mondal P, Mishra M, Perumalsamy B, Thirumurugan R, Dharumadurai D, Das S, Guin PS. Solubilization of sodium 3‐amino‐2‐hydroxyanthraquinone‐1‐sulphonate in sodium dodecyl sulfate micelles explains its permeation in
A549
human lung cancer cell. J CHIN CHEM SOC-TAIP 2020. [DOI: 10.1002/jccs.202000328] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Somenath Banerjee
- Department of Chemistry Shibpur Dinobundhoo Institution (College) Howrah West Bengal India
- Department of Chemistry Jadavpur University Kolkata West Bengal India
| | - Sanjay Roy
- Department of Chemistry Netaji Subhas Open University, Regional Centre Kalyani Nadia West Bengal India
| | - Arup Datta
- Department of Chemistry Shibpur Dinobundhoo Institution (College) Howrah West Bengal India
| | - Palash Mondal
- Department of Chemistry Vivekananda Mahavidyalaya Burdwan West Bengal India
| | - Monali Mishra
- National Centre for Alternatives to Animal Experiments (NCAAE), Bharathidasan University Tiruchirappalli Tamil Nadu India
| | - Balaji Perumalsamy
- National Centre for Alternatives to Animal Experiments (NCAAE), Bharathidasan University Tiruchirappalli Tamil Nadu India
| | - Ramasamy Thirumurugan
- National Centre for Alternatives to Animal Experiments (NCAAE), Bharathidasan University Tiruchirappalli Tamil Nadu India
| | - Dhanasekaran Dharumadurai
- National Centre for Alternatives to Animal Experiments (NCAAE), Bharathidasan University Tiruchirappalli Tamil Nadu India
- Department of Microbiology School of Life Sciences, Bharathidasan University Tiruchirappalli Tamil Nadu India
| | - Saurabh Das
- Department of Chemistry Jadavpur University Kolkata West Bengal India
| | - Partha Sarathi Guin
- Department of Chemistry Shibpur Dinobundhoo Institution (College) Howrah West Bengal India
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Jang S, Lee S, Park H. β-Cyclodextrin Inhibits Monocytic Adhesion to Endothelial Cells through Nitric Oxide-Mediated Depletion of Cell Adhesion Molecules. Molecules 2020; 25:molecules25163575. [PMID: 32781622 PMCID: PMC7464935 DOI: 10.3390/molecules25163575] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 08/03/2020] [Accepted: 08/05/2020] [Indexed: 11/16/2022] Open
Abstract
Cyclodextrins (CDs) are used as drug delivery agents. In this study, we examined whether CDs have an inflammatory effect on endothelial cells. First, we found that β-CD promoted cell proliferation in bovine aortic endothelial cells and elevated nitric oxide (NO) production through dephosphorylation of threonine-495 (T-495) in endothelial nitric oxide synthetase (eNOS). Dephosphorylation of T-495 is known to activate eNOS. Phosphorylation of T-495 was found to be catalyzed by protein kinase Cε (PKCε). We then found that β-CD inhibits binding of PKCε to diacylglycerol (DAG) via formation of a β-CD-DAG complex, indicating that β-CD inactivates PKCε. Furthermore, β-CD controls activation of PKCε by reducing the recruitment of PKCε into the plasma membrane. Finally, β-CD inhibits expression of intercellular and vascular cell adhesion molecule-1 by increasing NO via control of PKCε/eNOS and suppression of THP-1 cell adhesion to endothelial cells. These findings imply that β-CD plays an important role in anti-inflammatory processes.
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Affiliation(s)
| | | | - Heonyong Park
- Correspondence: ; Tel.: +82-41-550-3489; Fax: +82-41-559-7941
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Moreira-Oliveira SS, Amaral-Machado L, de Oliveira WN, Alencar ÉN, Zatta KC, de Souza LBFC, Medeiros ADC, Chaves GM, Egito EST. Buccal Bullfrog ( Rana catesbeiana Shaw) Oil Emulsion: A Mucoadhesive System Intended for Treatment of Oral Candidiasis. Pharmaceutics 2018; 10:E257. [PMID: 30513861 PMCID: PMC6320908 DOI: 10.3390/pharmaceutics10040257] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Revised: 11/05/2018] [Accepted: 11/07/2018] [Indexed: 11/17/2022] Open
Abstract
Oral candidiasis (OC) is an infectious disease caused by microorganisms of the genus Candida, leading to lesions in the buccal cavity. Its treatment consists of the administration of topical or systemic antifungal agents, which may compromise the patient compliance due to its side effects, highlighting the need for alternative treatments. In this scenario, bullfrog oil, an animal oil composed of a pool of saturated and unsaturated fatty acids, is introduced as a potential antifungal raw material. Thus, the aim of this work was to produce a mucoadhesive emulsified system able to deliver the bullfrog oil in the buccal cavity to treat the OC. The emulsion was produced and characterized by visual inspection, droplet size, polydispersity index (PdI), and zeta potential over the course of 60 days. In addition, its mucoadhesive ability was evaluated using an in vitro mucin model. The antifungal activity, evaluated by the broth microdilution assay and the biocompatibility, performed against human erythrocytes, were also carried out. The emulsion showed a droplet size of 320.79 ± 35.60 nm, a PdI of 0.49 ± 0.08, and a zeta potential of -38.53 ± 6.23 mV, with no significant changes over 60 days. The mucoadhesive properties of the system was improved by the use of pharmaceutical excipients. The antifungal activity showed that the bullfrog oil and the emulsion were able to inhibit the growth of different Candida species. Furthermore, the emulsion showed no significant hemolytic effect. Overall, the system showed suitable physicochemical characteristics and biocompatibility, with substantial in vitro antifungal activity, suggesting that this system can be further investigated for OC treatment.
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Affiliation(s)
- Susiane S Moreira-Oliveira
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte (UFRN), Av. General Gustavo Cordeiro de Faria-SN-Petrópolis, Natal 59012-570, Brazil.
| | - Lucas Amaral-Machado
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte (UFRN), Av. General Gustavo Cordeiro de Faria-SN-Petrópolis, Natal 59012-570, Brazil.
| | - Wógenes Nunes de Oliveira
- Graduate Program in Pharmaceutical Sciences, UFRN, Av. General Gustavo Cordeiro de Faria-SN-Petrópolis, Natal 59012-570, Brazil.
| | - Éverton N Alencar
- Laboratory of Dispersed Systems (LaSiD), UFRN, Av. General Gustavo Cordeiro de Faria-SN-Petrópolis, Natal 59012-570, Brazil.
| | - Kelly Cristine Zatta
- Faculty of Pharmacy, Federal University of Rio Grande do Sul (UFRGS), Av. Ipiranga-2752-Santana, Porto Alegre 90610-000, Brazil.
| | - Luanda B F C de Souza
- Graduate Program in Pharmaceutical Sciences, UFRN, Av. General Gustavo Cordeiro de Faria-SN-Petrópolis, Natal 59012-570, Brazil.
| | - Aldo da Cunha Medeiros
- Department of Surgery, UFRN Av. General Gustavo Cordeiro de Faria-SN-Petrópolis, Natal 59012-570, Brazil.
| | - Guilherme Maranhão Chaves
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte (UFRN), Av. General Gustavo Cordeiro de Faria-SN-Petrópolis, Natal 59012-570, Brazil.
- Graduate Program in Pharmaceutical Sciences, UFRN, Av. General Gustavo Cordeiro de Faria-SN-Petrópolis, Natal 59012-570, Brazil.
| | - Eryvaldo S T Egito
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte (UFRN), Av. General Gustavo Cordeiro de Faria-SN-Petrópolis, Natal 59012-570, Brazil.
- Graduate Program in Pharmaceutical Sciences, UFRN, Av. General Gustavo Cordeiro de Faria-SN-Petrópolis, Natal 59012-570, Brazil.
- Laboratory of Dispersed Systems (LaSiD), UFRN, Av. General Gustavo Cordeiro de Faria-SN-Petrópolis, Natal 59012-570, Brazil.
- Laboratório de Sistemas Dispersos, Departamento de Farmácia, Universidade Federal do Rio Grande do Norte, Rua Praia de Areia Branca, 8948, Natal 59094-450, RN, Brazil.
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Thakur S, Riyaz B, Patil A, Kaur A, Kapoor B, Mishra V. Novel drug delivery systems for NSAIDs in management of rheumatoid arthritis: An overview. Biomed Pharmacother 2018; 106:1011-1023. [DOI: 10.1016/j.biopha.2018.07.027] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 07/05/2018] [Accepted: 07/05/2018] [Indexed: 12/21/2022] Open
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Oliveira WN, Amaral-Machado L, Alencar EN, Marcelino HR, Genre J, Silva-Rocha WP, Gondim AD, Chaves GM, Fernandes-Pedrosa MF, Egito EST. Getting the Jump on the Development of Bullfrog Oil Microemulsions: a Nanocarrier for Amphotericin B Intended for Antifungal Treatment. AAPS PharmSciTech 2018; 19:2585-2597. [PMID: 29916194 DOI: 10.1208/s12249-018-1093-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Accepted: 05/29/2018] [Indexed: 12/11/2022] Open
Abstract
Amphotericin B (AmB), a potent antifungal drug, presents physicochemical characteristics that impair the development of suitable dosage forms. In order to overcome the AmB insolubility, several lipid carriers such as microemulsions have been developed. In this context, the bullfrog oil stands out as an eligible oily phase component, since its cholesterol composition may favor the AmB incorporation. Thus, the aim of this study was to develop a microemulsion based on bullfrog oil containing AmB. Moreover, its thermal stability, antifungal activity, and cytotoxicity in vitro were evaluated. The microemulsion formulation was produced using the pseudo-ternary phase diagram (PTPD) approach and the AmB was incorporated based on the pH variation technique. The antifungal activity was evaluated by determination of minimal inhibitory concentration (MIC) against different species of Candida spp. and Trichosporon asahii. The bullfrog oil microemulsion, stabilized with 16.8% of a surfactant blend, presented an average droplet size of 26.50 ± 0.14 nm and a polydispersity index of 0.167 ± 0.006. This system was able to entrap AmB up to 2 mg mL-1. The use of bullfrog oil as oily phase allowed an improvement of the thermal stability of the system. The MIC assay results revealed a growth inhibition for different strains of Candida spp. and were able to enhance the activity of AmB against T. asahii. The microemulsion was also able to reduce the AmB toxicity. Finally, the developed microemulsion showed to be a suitable system to incorporate AmB, improving the system's thermal stability, increasing the antifungal activity, and reducing the toxicity of this drug.
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Roy S, Sarathi Sengupta P, Sarathi Guin P. Electrochemical and UV–Vis spectroscopic studies on the interaction of sodium 1,4-dihydroxy-9,10-anthrauinone-2-sulphonate with cetyltrimethylammonium bromide micelles. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.01.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Granada A, Otsuka I, Caon T, Silva MAS, Soldi V, Borsali R. Novel hybrid block copolymer nanocarrier systems to load lipophilic drugs prepared by microphase inversion method. JOURNAL OF POLYMER RESEARCH 2017. [DOI: 10.1007/s10965-017-1351-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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da Silva GBRF, Alécio AC, Scarpa MVC, do Egito EST, Sequinel R, Hatanaka RR, Oliveira JE, Oliveira AGD. An analytical GC-MS method to quantify methyl dihydrojasmonate in biocompatible oil-in-water microemulsions: physicochemical characterization and in vitro release studies. Pharm Dev Technol 2017; 23:151-157. [PMID: 28565943 DOI: 10.1080/10837450.2017.1337792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Microemulsions (MEs) loaded with methyl dihydrojasmonate (MJ) were developed to improve the aqueous solubility of this drug. The composition of the formulations ranged according to the oil/surfactant ratio (O/S). The MEs were characterized according to diameter of droplets, X-ray diffraction and polarized light microscopy. The MJ identification and quantification was performed by gas chromatography-mass spectrometry (GC-MS). The MJ showed a retention time of ∼16.7 min for all samples. The obtained correlation coefficient from the calibration graph was 0.991. The developed analytical method was effective enough to quantify low and high concentrations of MJ. The increase of the O/S ME ratio led to a reduction of the droplet diameter. All formulations showed an amorphous structure and the behavior varied between isotropic and anisotropic systems. A decrease in the release of MJ with the increase of the O/S ratio in the formulations was observed. The analytical method developed for the quantitative determination of MJ is suitable to detect and quantify the drug compound from different compositions of MEs in the in vitro release test, and by analogy in other prolonged effects related to the drug reservoir effect of these systems was observed, revealing that ME can be a promising nanocarrier for MJ delivery to tumor cells.
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Affiliation(s)
- Gisela Bevilacqua Rolfsen Ferreira da Silva
- a Faculdade de Ciências Farmacêuticas, Departamento de Fármacos e Medicamentos, PPG em Ciências Farmacêuticas , Unesp-Universidade Estadual Paulista , Araraquara , SP , Brazil
| | - Alberto Camilo Alécio
- b Instituto de Quimica, Centro de Monitoramento e Pesquisa da Qualidade de Combustíveis (CEMPEQC) , Unesp-Universidade Estadual Paulista , Araraquara , SP , Brazil
| | - Maria Virginia Costa Scarpa
- a Faculdade de Ciências Farmacêuticas, Departamento de Fármacos e Medicamentos, PPG em Ciências Farmacêuticas , Unesp-Universidade Estadual Paulista , Araraquara , SP , Brazil
| | | | - Rodrigo Sequinel
- b Instituto de Quimica, Centro de Monitoramento e Pesquisa da Qualidade de Combustíveis (CEMPEQC) , Unesp-Universidade Estadual Paulista , Araraquara , SP , Brazil
| | - Rafael Rodrigues Hatanaka
- b Instituto de Quimica, Centro de Monitoramento e Pesquisa da Qualidade de Combustíveis (CEMPEQC) , Unesp-Universidade Estadual Paulista , Araraquara , SP , Brazil
| | - José Eduardo Oliveira
- b Instituto de Quimica, Centro de Monitoramento e Pesquisa da Qualidade de Combustíveis (CEMPEQC) , Unesp-Universidade Estadual Paulista , Araraquara , SP , Brazil
| | - Anselmo Gomes de Oliveira
- a Faculdade de Ciências Farmacêuticas, Departamento de Fármacos e Medicamentos, PPG em Ciências Farmacêuticas , Unesp-Universidade Estadual Paulista , Araraquara , SP , Brazil
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Azum N, Rub MA, Asiri AM. Self-association and micro-environmental properties of sodium salt of ibuprofen with BRIJ-56 under the influence of aqueous/urea solution. J DISPER SCI TECHNOL 2016. [DOI: 10.1080/01932691.2016.1144197] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Naved Azum
- Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Malik Abdul Rub
- Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Abdullah M. Asiri
- Center of Excellence for Advanced Materials Research, King Abdulaziz University, Jeddah, Saudi Arabia
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
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15
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Preparation, in-vitro release and antioxidant potential of formulation of apigenin with hydroxypropyl-β-cyclodextrin modified microemulsion. J INCL PHENOM MACRO 2016. [DOI: 10.1007/s10847-016-0644-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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16
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Arruda GJB, Rossanezi G, Scarpa MV, Egito ESTD, Oliveira AGD. ESTRATÉGIAS TECNOLÓGICAS PARA FORMULAÇÕES DE ANFOTERICINA B EM SISTEMAS LIPÍDICOS DISPONÍVEIS NO MERCADO FARMACÊUTICO E OUTROS PROMISSORES SISTEMAS DE ADMINISTRAÇÃO. ACTA ACUST UNITED AC 2016. [DOI: 10.14450/2318-9312.v28.e2.a2016.pp59-67] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A anfotericina B (AmB) é um fármaco antifúngico utilizado no tratamento de micoses sistêmicas desde sua descoberta nos anos de 1950. O objetivo deste trabalho foi estabelecer o estado da arte das estratégias tecnológicas envolvidas nas formas de administração da AmB, nas intervenções diretas nos aspectos de melhoria de solubilidade do fármaco, que possibilitem sua administração por via intravenosa (iv) e minimizem sua toxicidade. Devido à limitada utilidade clínica do sal de desoxicolato (Fungizon®) em razão de sua alta toxicidade, sistemas de liberação mais eficientes foram desenvolvidos. Neste trabalho, são apresentadas as principais formulações disponíveis no mercado farmacêutico e outras formulações lipídicas promissoras, as quais se mostraram mais eficazes como veículos de solubilização e menos tóxicas quando comparadas com a AmB esoxicolato, mas ainda não fazem parte da rotina hospitalar para o tratamento de micoses profundas.
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17
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Datta A, Roy S, Mondal P, Guin PS. Spectroscopic, computational and electrochemical studies on 2-(4-nitrophenyl)-1H-benzo[d]imidazole and its interaction with cationic surfactant cetyltrimethylammonium bromide. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.04.049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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Das A, Roy S, Mondal P, Datta A, Mahali K, Loganathan G, Dharumadurai D, Sengupta PS, Akbarsha MA, Guin PS. Studies on the interaction of 2-amino-3-hydroxy-anthraquinone with surfactant micelles reveal its nucleation in human MDA-MB-231 breast adinocarcinoma cells. RSC Adv 2016. [DOI: 10.1039/c6ra00062b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Structural, spectroscopic and biochemical studies on 2-amino-3-hydroxy-anthraquinone (AQ) were carried out.
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Affiliation(s)
- Amit Das
- Ramsaday College
- Howrah-711401
- India
- Department of Chemistry
- Shibpur Dinobundhoo Institution (College)
| | - Sanjay Roy
- Department of Chemistry
- Shibpur Dinobundhoo Institution (College)
- Howrah-711 102
- India
| | - Palash Mondal
- Department of Chemistry (UG & PG)
- Burdwan 713103
- India
| | - Arup Datta
- Department of Chemistry
- Shibpur Dinobundhoo Institution (College)
- Howrah-711 102
- India
| | | | - Gayathri Loganathan
- Department of Microbiology
- School of Life Sciences
- Bharathidasan University
- Tiruchirappalli-620024
- India
| | - Dhanasekaran Dharumadurai
- Department of Microbiology
- School of Life Sciences
- Bharathidasan University
- Tiruchirappalli-620024
- India
| | | | - Mohammad A. Akbarsha
- Mahathma Gandhi-Doerenkamp Center
- Bharathidasan University
- Tiruchirappalli-620024
- India
- Department of Food Science and Nutrition
| | - Partha Sarathi Guin
- Department of Chemistry
- Shibpur Dinobundhoo Institution (College)
- Howrah-711 102
- India
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19
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Investigation on the interaction of 1-amino-4-hydroxy-9,10-anthraquinone with calf thymus DNA and CTAB micelles. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2015.08.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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20
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Rahimi M, Mobedi H, Behnamghader A. In situforming poly(lactic acid-co-glycolic acid) implants containing leuprolide acetate/β-cyclodextrin complexes: preparation, characterization, andin vitrodrug release. INT J POLYM MATER PO 2015. [DOI: 10.1080/00914037.2015.1055633] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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21
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Aloisio C, Longhi MR, De Oliveira AG. Development and Characterization of a Biocompatible Soybean Oil-Based Microemulsion for the Delivery of Poorly Water-Soluble Drugs. J Pharm Sci 2015; 104:3535-43. [PMID: 26149419 DOI: 10.1002/jps.24555] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 05/19/2015] [Accepted: 06/04/2015] [Indexed: 11/11/2022]
Abstract
The aim of this work was the development and characterization of a biocompatible microemulsion (ME) containing soybean oil (O), phosphatidylcholine/sodium oleate/Eumulgin®HRE40 as the surfactant mixture (S) and water or buffer solution as the aqueous phase (W), for oral delivery of the poorly water-soluble drugs sulfamerazine (SMR) and indomethacin (INM). A wide range of combinations to obtain clear oil-in-water (o/w) ME was observed from pseudo-ternary phase diagrams, which was greater after the incorporation of both drugs, suggesting that they acted as stabilizers. Drug partition studies indicated a lower affinity of the drugs for the oil domain when they were ionized and with increased temperature, explained by the fact that both drugs were introduced inside the oil domain, determined by nuclear magnetic resonance. High concentrations of SMR and INM were able to be incorporated (22.0 and 62.3 mg/mL, respectively). The ME obtained presented an average droplet size of 100 nm and a negative surface charge. A significant increase in the release of SMR was observed with the ME with the highest percentage of O, because of the solubilizing properties of the ME. Also, a small retention effect was observed for INM, which may be explained by the differences in the partitioning properties of the drugs.
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Affiliation(s)
- Carolina Aloisio
- Unidad de Investigación y Desarrollo en Ciencia y Tecnología Farmacéutica (UNITEFA-CONICET), Departamento de Farmacia, Facultad de Ciencias Químicas-Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, X5000HUA, Argentina.,UNESP-Universidade Estadual Paulista, Faculdade de Ciências Farmacêuticas, Araraquara, São Paulo, 14801-902, Brazil
| | - Marcela R Longhi
- Unidad de Investigación y Desarrollo en Ciencia y Tecnología Farmacéutica (UNITEFA-CONICET), Departamento de Farmacia, Facultad de Ciencias Químicas-Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba, X5000HUA, Argentina
| | - Anselmo Gomes De Oliveira
- UNESP-Universidade Estadual Paulista, Faculdade de Ciências Farmacêuticas, Araraquara, São Paulo, 14801-902, Brazil
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22
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Noori S, Naqvi AZ, Ansari WH, Kabir-ud-Din. Effect of Asymmetric Dimeric Zwitterionic Surfactants on Micellization Behavior of Amphiphilic Drugs. J SOLUTION CHEM 2015. [DOI: 10.1007/s10953-015-0338-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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23
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El-Say KM, Abd-Allah FI, Lila AE, Hassan AESA, Kassem AEA. Diacerein niosomal gel for topical delivery: development,in vitroandin vivoassessment. J Liposome Res 2015; 26:57-68. [DOI: 10.3109/08982104.2015.1029495] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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24
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Martins L, Arrais M, de Souza A, Marsaioli A. 1H NMR studies of binary and ternary dapsone supramolecular complexes with different drug carriers: EPC liposome, SBE-β-CD and β-CD. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2014; 52:665-672. [PMID: 25042274 DOI: 10.1002/mrc.4087] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 05/07/2014] [Accepted: 05/10/2014] [Indexed: 06/03/2023]
Abstract
Binary and ternary systems composed of dapsone, sulfobutylether-β-cyclodextrin (SBE-β-CD), β-CD and egg phosphatidylcholine (EPC) were evaluated using 1D ROESY, saturation transfer difference NMR and diffusion experiments (DOSY) revealing the binary complexes Dap/β-CD (K(a) 1396 l mol(-1)), Dap/SBE-β-CD (K(a) 246 l mol(-1)), Dap/EPC (K(a) 84 l mol(-1)) and the ternary complex Dap/β-CD/EPC (K(a) 18 l mol(-1)) in which dapsone is more soluble.
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Affiliation(s)
- Lucas Martins
- University of Campinas, Chemistry Institute, Campinas, Brazil
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25
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Rahimi M, Mobedi H, Behnamghader A. Aqueous stability of leuprolide acetate: effect of temperature, dissolved oxygen, pH and complexation with β-cyclodextrin. Pharm Dev Technol 2014; 21:108-15. [PMID: 25331295 DOI: 10.3109/10837450.2014.971377] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In the present research, the aqueous stability of leuprolide acetate (LA) in phosphate buffered saline (PBS) medium was studied (pH = 2.0-7.4). For this purpose, the effect of temperature, dissolved oxygen and pH on the stability of LA during 35 days was investigated. Results showed that the aqueous stability of LA was higher at low temperatures. Degassing of the PBS medium partially increased the stability of LA at 4 °C, while did not change at 37 °C. The degradation of LA was accelerated at lower pH values. In addition, complexes of LA with different portions of β-cyclodextrin (β-CD) were prepared through freeze-drying procedure and characterized by Fourier transform infrared (FTIR) and differential scanning calorimetry (DSC) analyses. Studying their aqueous stability at various pH values (2.0-7.4) showed LA/β-CD complexes exhibited higher stability when compared with LA at all pH values. The stability of complexes was also improved by increasing the portion of LA/β-CD up to 1/10.
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Affiliation(s)
- Mehdi Rahimi
- a Department of Biomedical Engineering, Science and Research Branch , Islamic Azad University , Tehran , Iran
| | - Hamid Mobedi
- b Department of Novel Drug Delivery Systems , Iran Polymer and Petrochemical Institute , Tehran , Iran , and
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26
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Zhang J, Lv Y, Zhao S, Wang B, Tan M, Xie H, Lv G, Ma X. Effect of lipolysis on drug release from self-microemulsifying drug delivery systems (SMEDDS) with different core/shell drug location. AAPS PharmSciTech 2014; 15:731-40. [PMID: 24554238 DOI: 10.1208/s12249-014-0096-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 01/28/2014] [Indexed: 11/30/2022] Open
Abstract
The objective of this study is to investigate the effect of lipolysis on the release of poorly water-soluble drug from SMEDDS in the perspective of drug core/shell location. For this purpose, four SMEDDS formulations with various core/shell properties were developed based on long-chain lipid or medium-chain lipid as well as different surfactant/oil ratios. Poorly water-soluble drugs, hymecromone and resveratrol, were significantly solubilized in all SMEDDS formulations and the diluted microemulsions. Fluorescence spectra analysis indicated that hymecromone was mainly located in the shell of microemulsions, while resveratrol was located in the core. The effect of lipolysis on the release rates of drugs with different core/shell locations were investigated by a modified in vitro drug release model. For the drug located in the shell, hymecromone, the release profiles were not affected during the lipolysis process and no significant differences were observed among four formulations. For the drug located in the core, resveratrol, the release rates were increased to various degrees depending on the extent of digestion. In conclusion, the drug core/shell location plays an important role for determining the effect of lipolysis on drug release from SMEDDS formulation.
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27
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Micellar interaction study of synthetic antioxidant (BHA) and sodium dodecyl sulfate (SDS) in aqueous solution for potential pharmaceutical/food applications. J Mol Liq 2013. [DOI: 10.1016/j.molliq.2013.08.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Centkowska K, Sznitowska M. Modified-release ointment with nitroglycerin β-cyclodextrin inclusion complex for treatment of anal fissures. J Pharm Pharmacol 2013; 65:1463-72. [DOI: 10.1111/jphp.12120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Accepted: 06/20/2013] [Indexed: 11/30/2022]
Abstract
Abstract
Objectives
The aim was to evaluate ointments for local treatment of anal fissures. Nitroglycerin (NTG) was complexed with β-cyclodextrin (β-CD) to provide prolonged NTG release, with the intention of decreasing systemic drug absorption and thus reducing side effects.
Methods
Gels, creams and anhydrous water-emulsifying (AWE) ointment with NTG-CD were compared with preparations containing uncomplexed NTG (diluted with crospovidone, NTG-cP). The in-vitro NTG release and ex-vivo skin absorption were studied.
Key findings
The prolonged-release ointment with the NTG-CD complex was formulated using AWE base or w/o cream (20% water); release of NTG from a hydrogel was very fast with both the complexed and uncomplexed forms. From the AWE ointment base, 16.4% or 4.5% of the total NTG dose was released after 6 h when NTG-cP or NTG-CD was incorporated, respectively. With the complexed form, NTG absorption to the skin after a 5-h application was 18.1 or 11.1 μg/g from AWE ointment or cream, respectively; absorption of the uncomplexed NTG was higher: 52.3 or 21.9 μg/g from AWE ointment and cream, respectively.
Conclusions
Complexation with β-CD results in prolonged release of NTG from AWE ointment and w/o cream, which was confirmed by the ex-vivo skin absorption results.
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Affiliation(s)
- Katarzyna Centkowska
- Department of Pharmaceutical Technology, Medical University of Gdansk, Gdansk, Poland
| | - Malgorzata Sznitowska
- Department of Pharmaceutical Technology, Medical University of Gdansk, Gdansk, Poland
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29
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Co-solubilization of the Hydrophobic Drugs Carbamazepine and Nifedipine in Aqueous Nonionic Surfactant Media. J SOLUTION CHEM 2013. [DOI: 10.1007/s10953-013-0036-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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30
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Shinde U, Pokharkar S, Modani S. Design and evaluation of microemulsion gel system of nadifloxacin. Indian J Pharm Sci 2013; 74:237-47. [PMID: 23439454 PMCID: PMC3574534 DOI: 10.4103/0250-474x.106066] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Revised: 06/14/2012] [Accepted: 06/19/2012] [Indexed: 11/22/2022] Open
Abstract
Topical microemulsion systems for the antiacne agent, nadifloxacin were designed and developed to overcome the problems associated with the cutaneous delivery due to poor water solubility. The solubility of nadifloxacin in oils, surfactants and cosurfactants was evaluated to screen the components of the microemulsion. Various surfactants and cosurfactants were screened for their ability to emulsify the selected oily phase. The pseudoternary diagrams were constructed to identify the area of microemulsion existence. The influence of km (surfactant/cosurfactant) ratio on the microemulsion existence region was determined and optimum systems were designed. The systems were assessed for drug-loading efficiency and characterised for optical birefringence, pH and refractive index, robustness to dilution, globule size, drug content and thermodynamic stability. Optimised microemulsion systems were formulated into gel form and evaluated for viscosity, spreadability, drug content, ex vivo skin permeation and antibacterial activity. The maximum solubility of nadifloxacin in the microemulsion system was found to be 0.25%. The nadifloxacin microemulsions had a small and uniform globule size (67.3-121.23 nm). The stability results revealed that all formulations showed a stable globule size and the polydispersity index under stress conditions. Incorporation of nadifloxacin in microemulsion gel increased the ex vivo skin permeation and antibacterial activity when compared to marketed cream.
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Affiliation(s)
- Ujwala Shinde
- Department of Pharmaceutics, Bombay College of Pharmacy, Kalina, Santacruz (E), Mumbai-400 098, India
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31
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Assumpção JUCV, Campos ML, Ferraz Nogueira Filho MA, Pestana KC, Baldan HM, Formariz Pilon TP, de Oliveira AG, Peccinini RG. Biocompatible microemulsion modifies the pharmacokinetic profile and cardiotoxicity of doxorubicin. J Pharm Sci 2012; 102:289-96. [PMID: 23150468 DOI: 10.1002/jps.23368] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Revised: 09/22/2012] [Accepted: 10/19/2012] [Indexed: 11/11/2022]
Abstract
Doxorubicin (DOX) is an anthracycline antibiotic with a broad antitumor spectrum. However, the clinical use of DOX is limited because of its cardiotoxicity, a dose-dependent effect. Colloidal drug delivery systems, such as microemulsions (MEs), allow the incorporation of drugs, modifying the pharmacokinetic (PK) profile and toxic effects. In this study, we evaluated the PK profile and cardiotoxicity of a new DOX ME (DOX-ME). The PK profile of DOX-ME was determined and compared with that of the conventional DOX after single-dose administration (6 mg/kg, intravenous) in male Wistar rats (n = 12 per group). The cardiotoxicity of DOX formulations was evaluated by serum creatine kinase MB (CKMB) activity in both animal groups before and after drug administration. The plasma DOX measurements were performed by high-performance liquid chromatography with fluorescence detection, and the CKMB levels were assayed using the CKMB Labtest® kit. The ME system showed a significant increase in plasma DOX concentrations and lower distribution volume when compared with conventional DOX. Serum CKMB activity increased after conventional DOX administration but was unchanged in the DOX-ME group. These results demonstrate modifications in drug access to susceptible sites using DOX-ME. DOX-ME displayed features that make it a promising system for future therapeutic application.
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Bourkaib N, Zhou J, Yao J, Fang Z, Mezghrani O. Combination of β-cyclodextrin inclusion complex and self-microemulsifying drug delivery system for photostability and enhanced oral bioavailability of methotrexate: novel technique. Drug Dev Ind Pharm 2012; 39:918-27. [DOI: 10.3109/03639045.2012.718785] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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33
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Shazly GA, Ibrahim MA, Badran MM, Zoheir KMA. Utilizing Pluronic F-127 and Gelucire 50/13 Solid Dispersions for Enhanced Skin Delivery of Flufenamic Acid. Drug Dev Res 2012. [DOI: 10.1002/ddr.21013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | | | | | - Khairy M. A. Zoheir
- Department of Pharmacology; College of Pharmacy; King Saud University; Riyadh; Kingdom of Saudi Arabia
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34
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Pharmacokinetic study of an oral piroxicam formulation containing different molar ratios of β-cyclodextrins. J INCL PHENOM MACRO 2012. [DOI: 10.1007/s10847-012-0166-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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35
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Jain R, Vikas. Voltammetric behaviour of antimalarial drug artesunate in solubilized systems. Colloids Surf B Biointerfaces 2011; 88:729-33. [DOI: 10.1016/j.colsurfb.2011.08.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Revised: 08/09/2011] [Accepted: 08/10/2011] [Indexed: 10/17/2022]
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36
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Radia O, Rogalska E, Moulay-Hassane G. Preparation of meloxicam-β-cyclodextrin-polyethylene glycol 6000 ternary system: characterization, in vitro and in vivo bioavailability. Pharm Dev Technol 2011; 17:632-7. [PMID: 21428700 DOI: 10.3109/10837450.2011.565347] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Ternary complexes of meloxicam (ML), a poorly water-soluble anti-inflammatory drug, with β-cyclodextrin (βCD) and polyethylene glycol (PEG) 6000 were prepared from an equimolar (ML-βCD) and 10% of PEG. Characterization of the ternary complex was carried out by differential scanning calorimetry and X-ray diffractometry. The solubility of ML increased as a function of increasing the concentration of βCD and PEG 6000. Ternary system increased significantly ML solubility in water. Ternary complexes improved drug release compared with ML and ML-βCD. The oral bioavailability of ML-βCD-PEG was investigated by administration to rat and compared with ML and ML-βCD. The results confirmed that the oral bioavailability of ML was significantly improved by complexation with βCD in the presence of PEG.
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Affiliation(s)
- Ourezki Radia
- Laboratoire de chromatographie, Faculté de chimie, El-Alia, Bab-Ezzouar, Alger, Algeria
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37
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Abdulkarim MF, Abdullah GZ, Chitneni M, Salman IM, Ameer OZ, Yam MF, Mahdi ES, Sattar MA, Basri M, Noor AM. Topical piroxicam in vitro release and in vivo anti-inflammatory and analgesic effects from palm oil esters-based nanocream. Int J Nanomedicine 2010; 5:915-24. [PMID: 21116332 PMCID: PMC2990385 DOI: 10.2147/ijn.s13305] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION During recent years, there has been growing interest in use of topical vehicle systems to assist in drug permeation through the skin. Drugs of interest are usually those that are problematic when given orally, such as piroxicam, a highly effective anti-inflammatory, anti-pyretic, and analgesic, but with the adverse effect of causing gastrointestinal ulcers. The present study investigated the in vitro and in vivo pharmacodynamic activity of a newly synthesized palm oil esters (POEs)-based nanocream containing piroxicam for topical delivery. METHODS A ratio of 25:37:38 of POEs: external phase: surfactants (Tween 80:Span 20, in a ratio 80:20), respectively was selected as the basic composition for the production of a nanocream with ideal properties. Various nanocreams were prepared using phosphate-buffered saline as the external phase at three different pH values. The abilities of these formulae to deliver piroxicam were assessed in vitro using a Franz diffusion cell fitted with a cellulose acetate membrane and full thickness rat skin. These formulae were also evaluated in vivo by comparing their anti-inflammatory and analgesic activities with those of the currently marketed gel. RESULTS After eight hours, nearly 100% of drug was transferred through the artificial membrane from the prepared formula F3 (phosphate-buffered saline at pH 7.4 as the external phase) and the marketed gel. The steady-state flux through rat skin of all formulae tested was higher than that of the marketed gel. Pharmacodynamically, nanocream formula F3 exhibited the highest anti- inflammatory and analgesic effects as compared with the other formulae. CONCLUSION The nanocream containing the newly synthesized POEs was successful for trans-dermal delivery of piroxicam.
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Kaur N, Puri R, Jain SK. Drug-cyclodextrin-vesicles dual carrier approach for skin targeting of anti-acne agent. AAPS PharmSciTech 2010; 11:528-37. [PMID: 20333488 PMCID: PMC2902332 DOI: 10.1208/s12249-010-9411-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2009] [Accepted: 03/02/2010] [Indexed: 11/30/2022] Open
Abstract
In the present study attempt was made for preparation of isotretinoin-hydroxypropyl beta cyclodextrin (HP-beta-CD) inclusion complex and encapsulate this complex in elastic liposomes to study the effect of dual carrier approach on skin targeting of isotretinoin. The isotretinoin HP-beta-CD complex was prepared by freeze-drying method and characterized by IR spectroscopy. The drug and drug-CD complex loaded elastic liposomal formulation were prepared and characterized in vitro, ex-vivo and in vivo for shape, size, entrapment efficiency, no. of vesicles per cubic mm, in vitro skin permeation and deposition study, photodegradation and skin toxicity assay. The transdermal flux for different vesicular formulations was observed between 10.5 +/- 0.5 to 13.9 +/- 1.6 microg/cm(2)/h. This is about 15-21 folds higher than that obtained from drug solution (0.7 +/- 0.1 microg/cm(2)/h) and 4-5 folds higher than obtained with drug-CD complex solution (2.7 +/- 0.1 microg/cm(2)/h). The amount of drug deposit was found to increase significantly (p < 0.05) by cyclodextrin complexation (30.1 +/- 0.1 microg). The encapsulation of this complex in elastic liposomal formulation further increases its skin deposition (262.2 +/- 21 microg). The results of skin irritation study using Draize test also showed the significant reduction in skin irritation potential of isotretinoin elastic liposomal formulation in comparison to free drug. The results of the present study demonstrated that isotretinoin elastic liposomal formulation possesses great potential for skin targeting, prolonging drug release, reduction of photodegradation, reducing skin irritation and improving topical delivery of isotretinoin.
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Affiliation(s)
- Navjot Kaur
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Patiala, Punjab 147 002 India
| | - Richa Puri
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Patiala, Punjab 147 002 India
| | - Subheet Kumar Jain
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Patiala, Punjab 147 002 India
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39
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Tiwari G, Tiwari R, Rai AK. Cyclodextrins in delivery systems: Applications. JOURNAL OF PHARMACY AND BIOALLIED SCIENCES 2010; 2:72-9. [PMID: 21814436 PMCID: PMC3147107 DOI: 10.4103/0975-7406.67003] [Citation(s) in RCA: 248] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2010] [Revised: 03/26/2010] [Accepted: 04/13/2010] [Indexed: 11/06/2022] Open
Abstract
Cyclodextrins (CDs) are a family of cyclic oligosaccharides with a hydrophilic outer surface and a lipophilic central cavity. CD molecules are relatively large with a number of hydrogen donors and acceptors and, thus in general, they do not permeate lipophilic membranes. In the pharmaceutical industry, CDs have mainly been used as complexing agents to increase aqueous solubility of poorly soluble drugs and to increase their bioavailability and stability. CDs are used in pharmaceutical applications for numerous purposes, including improving the bioavailability of drugs. Current CD-based therapeutics is described and possible future applications are discussed. CD-containing polymers are reviewed and their use in drug delivery is presented. Of specific interest is the use of CD-containing polymers to provide unique capabilities for the delivery of nucleic acids. Studies in both humans and animals have shown that CDs can be used to improve drug delivery from almost any type of drug formulation. Currently, there are approximately 30 different pharmaceutical products worldwide containing drug/CD complexes in the market.
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Affiliation(s)
- Gaurav Tiwari
- Jaipur National University, Jagatpura, Jaipur, Rajasthan, India
| | - Ruchi Tiwari
- Department of pharmaceutics, Pranveer Singh Institute of Technology, Kalpi Road, Bhauti, Kanpur 208020, Uttar Pradesh, India
| | - Awani K. Rai
- Department of pharmaceutics, Pranveer Singh Institute of Technology, Kalpi Road, Bhauti, Kanpur 208020, Uttar Pradesh, India
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40
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Arantes LM, Scarelli C, Marsaioli AJ, de Paula E, Fernandes SA. Proparacaine complexation with beta-cyclodextrin and p-sulfonic acid calix[6]arene, as evaluated by varied (1)H-NMR approaches. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2009; 47:757-763. [PMID: 19557725 DOI: 10.1002/mrc.2460] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This study focused on the use of NMR techniques as a tool for the investigation of complex formation between proparacaine and cyclodextrins (CDs) or p-sulfonic acid calix[6]arene. The pH dependence of the complexation of proparacaine with beta-CD and p-sulfonic acid calix[6]arene was studied and binding constants were determined by (1)H NMR spectroscopy [diffusion-ordered spectroscopy (DOSY)] for the charged and uncharged forms of the local anesthetic in beta-CD and p-sulfonic acid calix[6]arene. The stoichiometries of the complexes was determined and rotating frame Overhauser enhancement spectroscopy (ROESY) 1D experiments revealed details of the molecular insertion of proparacaine into the beta-CD and p-sulfonic acid calix[6]arene cavities. The results unambiguously demonstrate that pH is an important factor for the development of supramolecular architectures based on beta-CD and p-sulfonic acid calix[6]arene as the host molecules. Such host-guest complexes were investigated in view of their potential use as new therapeutic formulations, designed to increase the bioavailability and/or to decrease the systemic toxicity of proparacaine in anesthesia procedures.
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Affiliation(s)
- Lucas Micquéias Arantes
- Grupo de Química Supramolecular e Biomimética (GQSB), Departamento de Química, Universidade Federal de Viçosa (UFV), Viçosa, 36570-000, MG, Brazil
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41
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Azeem A, Khan ZI, Aqil M, Ahmad FJ, Khar RK, Talegaonkar S. Microemulsions as a Surrogate Carrier for Dermal Drug Delivery. Drug Dev Ind Pharm 2009; 35:525-47. [DOI: 10.1080/03639040802448646] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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42
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Peira E, Chirio D, Carlotti M, Spagnolo R, Trotta M. Formulation studies of microemulsions for topical applications of acyclovir. J Drug Deliv Sci Technol 2009. [DOI: 10.1016/s1773-2247(09)50035-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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43
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Čudina O, Brborić J, Janković I, Karljiković-Rajić K, Vladimirov S. Study of valsartan interaction with micelles as a model system for biomembranes. Colloids Surf B Biointerfaces 2008; 65:80-4. [DOI: 10.1016/j.colsurfb.2008.03.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2007] [Revised: 03/04/2008] [Accepted: 03/06/2008] [Indexed: 11/30/2022]
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44
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Formariz TP, Chiavacci LA, Sarmento VHV, Franzini CM, Silva- AA, Scarpa MV, Santilli CV, Egito EST, Oliveira AG. Structural changes of biocompatible neutral microemulsions stabilized by mixed surfactant containing soya phosphatidylcholine and their relationship with doxorubicin release. Colloids Surf B Biointerfaces 2008; 63:287-95. [PMID: 18313903 DOI: 10.1016/j.colsurfb.2007.12.021] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2007] [Revised: 12/13/2007] [Accepted: 12/18/2007] [Indexed: 10/22/2022]
Abstract
Depending on the composition, the mixture of surfactant, oil and water, may form supramolecular aggregates with different structures which can significantly influence the drug release. In this work several microemulsion (ME) systems containing soya phosphatidylcholine (SPC) and eumulgin HRE40 (EU) as surfactant, cholesterol (O) as oil phase, and ultra-pure water as an aqueous phase were studied. MEs with and without the antitumoral drug doxorubicin (DOX) were prepared. The microstructures of the systems were characterized by photon correlation spectroscopy, rheological behavior, polarized light microscopy, small-angle X-ray scattering (SAXS) and X-ray diffraction (XRD). The results reveal that the diameter of the oil droplets was dependent on the surfactant (S) amount added to formulations. The apparent viscosity was dependent on the O/S ratio. High O/S ratio leads to the crystallization of cholesterol polymorphs phases which restricts the mobility of the DOX molecules into the ME structure. Droplets with short-range spatial correlation were formed from the ME with the low O/S ratio. The increase of the cholesterol fraction in the O/S mixture leads to the formation of ordered structures with lamellar arrangements. These different structural organizations directly influenced the drug release profiles. The in vitro release assay showed that the increase of the O/S ratio in the formulations inhibited the constant rate of DOX release. Since the DOX release ratio was directly dependent on the ratio of O/S following an exponential decay profile, this feature can be used to control the DOX release from the ME formulations.
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Affiliation(s)
- T P Formariz
- Departamento de Fármacos e Medicamentos, Faculdade de Ciências Farmacêuticas, UNESP, Rodovia Araraquara-Jaú km 01, 14801-902 Araraquara, SP, Brazil
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45
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Heuschkel S, Goebel A, Neubert RHH. Microemulsions--modern colloidal carrier for dermal and transdermal drug delivery. J Pharm Sci 2008; 97:603-31. [PMID: 17696162 DOI: 10.1002/jps.20995] [Citation(s) in RCA: 165] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Microemulsions are modern colloidal drug carrier systems. They form spontaneously combining appropriate amounts of a lipophilic and a hydrophilic ingredient, as well as a surfactant and a co-surfactant. Due to their special features, microemulsions offer several advantages for pharmaceutical use, such as ease of preparation, long-term stability, high solubilization capacity for hydrophilic and lipophilic drugs, and improved drug delivery. The article summarizes the level of research with respect to dermal and transdermal application. A large number of in vitro as well as some in vivo studies demonstrated that drugs incorporated into microemulsions penetrate efficiently into the skin. The enhancing activity seems to be attributable to a variety of factors depending on the composition and the resulting microstructure of the formulations. However, an extended use in practice depends on the choice of well-tolerated ingredients, mainly surfactants, and the restriction of their amounts in order to guarantee skin compatibility.
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Affiliation(s)
- Sandra Heuschkel
- Faculty of Biosciences, Institute for Pharmacy, Pharmaceutics and Biopharmaceutics, Martin Luther University Halle-Wittenberg, Wolfgang-Langenbeck-Str. 4, 06120 Halle/Saale, Germany
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46
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Misiuk W, Zalewska M. Study on the Inclusion Interactions of β‐Cyclodextrin and Its Derivative with Clomipramine by Spectroscopy and Its Analytic Application. ANAL LETT 2008. [DOI: 10.1080/00032710801910650] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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47
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Santos P, Watkinson A, Hadgraft J, Lane M. Application of Microemulsions in Dermal and Transdermal Drug Delivery. Skin Pharmacol Physiol 2008; 21:246-59. [DOI: 10.1159/000140228] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2007] [Accepted: 12/18/2007] [Indexed: 11/19/2022]
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48
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Formariz TP, Chiavacci LA, Sarmento VHV, Santilli CV, Tabosa do Egito ES, Oliveira AG. Relationship between structural features and in vitro release of doxorubicin from biocompatible anionic microemulsion. Colloids Surf B Biointerfaces 2007; 60:28-35. [PMID: 17614263 DOI: 10.1016/j.colsurfb.2007.05.017] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2007] [Revised: 05/18/2007] [Accepted: 05/21/2007] [Indexed: 10/23/2022]
Abstract
In this work structural features of anionic microemulsions, containing the pharmaceutical biocompatible components soya phosphatidylcholine (SPC), eumulgin HRE 40 (EU) and sodium oleate (SO) as surfactant, cholesterol (CHO) as oil phase and aqueous buffer were studied. Microemulsions were formulated with and without the antitumor drug doxorubicin (DOX). The various microstructures characterized in the pseudo-ternary phase diagram were analyzed by polarized light microscopy, small-angle X-ray scattering (SAXS) and X-ray diffraction (XRD) as well as by their ability to incorporate and release DOX. The experimental results demonstrated a correlation between the composition, the structural features and drug delivery. It was found that at higher cholesterol contents, the crystallization of CHO polymorph phases changed the mobility of DOX molecules. Droplets were formed with short-range spatial correlation from a microemulsion (ME) with a low surfactant:oil ratio. More ordered structures with lamellar arrangements formed by the increasing of the CHO proportions in the formulation may be due to CHO crystallization. The in vitro release of DOX showed that the presence of a high content of crystalline CHO prolongs the release of DOX from ME. The retention of DOX in the internal oil phase of the ME may modulate the drug release for a prolonged time. These results clearly demonstrate the potential of ME as a drug-delivery system.
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Affiliation(s)
- T P Formariz
- Departamento de Fármacos e Medicamentos, Faculdade de Ciências Farmacêuticas-UNESP, Rodovia Araraquara-Jaú km 01, 14801-902 Araraquara, SP, Brazil
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49
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Wang HY, Han J, Feng XG. Spectroscopic study of orange G-beta-cyclodextrin complex and its analytical application. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2007; 66:578-85. [PMID: 16859980 DOI: 10.1016/j.saa.2006.03.035] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2005] [Revised: 03/04/2006] [Accepted: 03/30/2006] [Indexed: 05/11/2023]
Abstract
The mechanism of the inclusion of orange G and beta-cyclodextrin (beta-CD) has been studied by using both spectrophotometry and infrared spectroscopy. Effects of the pH, concentrations of beta-CD, and ionic strength on the inclusion complex of beta-CD and orange G were examined. The result showed that orange G reacts with beta-CD to form a 1:1 host-guest complex with an apparent formation constant of 3.03 x 10(3)mol(-1)l. The thermodynamic parameters of inclusion complex, DeltaG(0), DeltaH(0), and DeltaS(0) were obtained. Based on the enhancement of the absorbance of orange G produced through complex formation, a ratiometric method spectrophotometrically for the determination of orange G in bulk aqueous solution in the presence of beta-CD was developed, which overcome the effect of condition change on the determination of orange G. The linear relationship between the absorbance and orange G concentration was obtained in the range of 1.0 x 10(-5) to 4.0 x 10(-5)mol l(-1), with a correlation coefficient of 0.9998. The detection limit was 3.6 x 10(-6)mol l(-1). The principal advantage of the proposed method is high accuracy because ratiometry was used in measurement.
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Affiliation(s)
- Huai You Wang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, People's Republic of China.
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50
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Fernandes SA, Cabeça LF, Marsaioli AJ, de Paula E. Investigation of tetracaine complexation with beta-cyclodextrins and p-sulphonic acid calix[6]arenes by nOe and PGSE NMR. J INCL PHENOM MACRO 2007. [DOI: 10.1007/s10847-006-9224-9] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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