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      Topical Delivery of Flurbiprofen from Pluronic Lecithin Organogel

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          Abstract

          The purpose of this research is to formulate and evaluate the suitability of pluronic lecithin organogels containing flurbiprofen for topical application. Four formulations were developed using flurbiprofen, lecithin, Pluronic F127, isopropyl palmitate, water, sorbic acid and potassium sorbate were coded as FL1, FL2, FL3 and FL4. All the formulations carried 30% w/w of lecithin phase and 70% w/w of Pluronic phase. The formulated organogels were evaluated for appearance and feel psychorheologically, in vitro diffusion study, drug content, viscosity and pH. Release of flurbiprofen from all formulations was monitored via dialysis membrane-70 and Wistar rat skin as a semipermeable membrane into phosphate buffer saline (0.2 M, pH 7.4) using Keshary-Chien diffusion cell. The viscosities of different formulations were determined by using Brookfield Viscometer at 25°. An attempt has been made to explore the potential of pluronic lecithin organogels for topical delivery of flurbiprofen.

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          Influence of lecithin on some physical chemical properties of poloxamer gels: rheological, microscopic and in vitro permeation studies.

          M.Vitória L.B Bentley, Juliana Marchetti, Nágila M.P.S. Ricardo … (1999)
          Thermoreversible gels may be used in delivery systems which require a sol-gel transition at body temperature. The influence of the addition of lecithin, a permeation enhancer, on the rheological and in vitro permeation properties of poloxamer 407 gels was investigated. Light microscopy and rheological parameters were used to characterize the microscopic structure of the formulations which showed non Newtonian behaviour, pseudoplastic flow with a yield value. Increased concentrations of lecithin increased the thixotropy, yield value, apparent viscosity, and the gelation temperature of the gels. Light microscopy showed the formation of micellar structures by the addition of lecithin, which may account for changes in rheological properties. In vitro permeation of a model drug, triamcinolone acetonide, was decreased when the lecithin concentration was increased. The presence of lecithin in the poloxamer gel improved the characteristics for topical drug delivery.
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            In-vitro transcutaneous delivery of ketoprofen and polyunsaturated fatty acids from a pluronic lecithin organogel vehicle containing fish oil.

            Suzanne H Richards, J. Thomas, Douglas C. Heard … (2006)
            This work explored the use of pluronic lecithin organogel (PLO) as a base for the delivery of bioactive polyunsaturated fatty acids from fish oil, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA) and ketoprofen. PLO was adapted to contain fish oil, ketoprofen, or both, and 1,8-cineole as penetration enhancer, and used to determine the in-vitro permeation from infinite and finite dosing protocols across full thickness porcine skin. Oruvail gel (2.5% ketoprofen) was included for comparison. No EPA or DHA was found to permeate skin when applied as an infinite dose. From multiple finite doses, small amount (max. 0.22%) of fish oil were found to permeate the skin. This indicates retention of fish oil within the gel matrix and that the viable domain of full thickness skin was a significant barrier. Greater amounts of EPA and DHA were delivered in the presence of ketoprofen indicating co-transport resulting from selective complexation, although no enhancement was observed using 1,8-cineole. Unlike EPA and DHA, substantial amounts of ketoprofen permeated when applied as infinite doses. Oruvail, a Carbopol 940-based hydrogel containing 2.5% ketoprofen and ethanol, delivered the greatest amount, although similar to the PLO gel containing 5% ketoprofen. The addition of propylene glycol enhanced permeation, although the presence of fish oil in the PLO gel inhibited ketoprofen permeation. When applied as multiple finite doses a maximum of 76 microm cm(-2) (1.12%) was delivered, which was reduced by the presence of 1,8-cineole. Greater permeation was again observed with Oruvail by a factor of two and with half the ketoprofen dose. To conclude, a PLO-based gel is capable of delivering EPA and DHA via a repeat finite dosing regimen, although there is evidence for the retention of these very lipophilic molecules within the gel matrix. Although to a lesser extent than EPA and DHA, ketoprofen was also substantially retained, as exemplified by the superior delivery rates from Oruvail. Finally, this work has highlighted the importance of using an appropriate topical dosing method to match the intended use of a product.
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              Topical delivery of aceclofenac from lecithin organogels: preformulation study.

              I M Shaikh, K R Jadhav, P S Gide … (2006)
              The purpose of this research is to evaluate the suitability of lecithin organogels containing aceclofenac for topical application. The present article focuses on the preformulation part of the whole research work. Thin layer chromatography was carried out to determine lecithin's purity. The excipients for formulating lecithin organogel were screened. Lecithin organogels are thermo reversible in nature and hence gelation temperature study was carried out to determine the temperature where Sol-Gel and Gel-Sol transformation takes place. Partition coefficient of the drug was estimated. Drug solubility in plain oil and organogel containing reverse micelles was estimated. Effect of water added on the properties of lecithin organogels such as X-ray diffraction pattern, conductivity and viscosity were determined. Microscopy of the gel sample has been carried out at different magnifications. The pseudo ternary phase diagram has been constructed to determine the organogel existence region. The permeation study of aceclofenac from different concentrations of lecithin organogels [200 mM, 300 mM and 400 mM] has been determined using cellulose acetate membrane (0.45 micro) and excised rat skin. Lecithin organogel in ethyl oleate has desired stability and consistency. A single spot on the TLC plate confirms the purity of soy lecithin to be used in organogel formation. Aceclofenac solubility was found to be more in lecithin/oil reverse micellar system as compared to its solubility in oil. The X-ray diffraction pattern confirms the incorporation of water in micellar gel network. The physical properties of organogels are affected by water incorporated and concentration of gelator. The permeation of aceclofenac through artificial membrane and excised rat skin demonstrated the same trend and were in the following order 200 mM>300 mM>400 mM. The results showed that organogel exhibits useful pharmaceutical properties.
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                Author and article information

                Journal
                Journal ID (nlm-ta): Indian J Pharm Sci
                Journal ID (publisher-id): IJPhS
                Title: Indian Journal of Pharmaceutical Sciences
                Publisher: Medknow Publications (India )
                ISSN (Print): 0250-474X
                ISSN (Electronic): 1998-3743
                Publication date (Print): Jan-Feb 2009
                Volume: 71
                Issue: 1
                Pages: 87-90
                Affiliations
                Department of Pharmaceutics, R. C. Patel Institute of Pharmaceutical Education and Research, Shirpur-425 405, India
                Author notes
                [* ] Address for correspondence E-mail: veenabelgamwar@ 123456rediffmail.com
                Article
                Publisher ID: IJPhS-71-87
                DOI: 10.4103/0250-474X.51955
                PMC ID: 2810062
                PubMed ID: 20177469
                SO-VID: cce067a3-edef-453b-9e10-cd70c3d23701
                Copyright © © Indian Journal of Pharmaceutical Sciences
                License:

                This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                Date received : 07 April 2008
                Date revision received : 27 August 2008
                Date accepted : 14 February 2009
                Categories
                Subject: Short Communication

                ScienceOpen disciplines: Pharmacology & Pharmaceutical medicine
                Keywords: flurbiprofen,topical delivery,pluronic lecithin organogel
                Data availability:
                ScienceOpen disciplines: Pharmacology & Pharmaceutical medicine
                Keywords: flurbiprofen, topical delivery, pluronic lecithin organogel

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