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Characterization of gelation process and drug release profile of thermosensitive liquid lecithin/poloxamer 407 based gels as carriers for percutaneous delivery of ibuprofen

Authorized Users Only
2015
Authors
Đekić, Ljiljana
Krajišnik, Danina
Martinović, Martina
Đorđević, Dragana
Primorac, Marija
Article (Published version)
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Abstract
Suitability of liquid lecithin (i.e., solution of lecithin in soy bean oil with similar to 60% w/w of phospholipids) for formation of gels, upon addition of water solution of poloxamer 407, was investigated, and formulated systems were evaluated as carriers for percutaneous delivery of ibuprofen. Formulation study of pseudoternary system liquid lecithin/poloxamer 407/water at constant liquid lecithin/poloxamer 407 mass ratio (2.0) revealed that minimum concentrations of liquid lecithin and poloxamer 407 required for formation of gel like systems were 15.75% w/w and 13.13% w/w, respectively, while the maximum content of water was 60.62% w/w. The systems comprising water concentrations in a range from 55 to 60.62% w/w were soft semisolids suitable for topical application, and they were selected for physicochemical and biopharmaceutical evaluation. Analysis of conductivity results and light microscopy examination revealed that investigated systems were water dilutable dispersions of spher...ical oligolamellar associates of phospholipids and triglyceride molecules in the copolymer water solution. Rheological behavior evaluation results indicated that the investigated gels were thermosensitive shear thinning systems. Ibuprofen (5% w/w) was incorporated by dispersing into the previously prepared carriers. Drug-loaded systems were physically stable at storage temperature from 5 +/- 3 degrees C to 40 +/- 2 degrees C, for 30 days. In vitro ibuprofen release was in accordance with the Higuchi model (r(H) > 0.95) and sustained for 12 h. The obtained results implicated that formulated LLPBGs, optimized regarding drug release and organoleptic properties, represent promising carriers for sustained percutaneous drug delivery of poorly soluble drugs.

Keywords:
Liquid lecithin / Poloxamer 407 / Thermosensitive gels / Gelation process / Sustained drug release / Ibuprofen
Source:
International Journal of Pharmaceutics, 2015, 490, 1-2, 180-189
Publisher:
  • Elsevier Science BV, Amsterdam
Projects:
  • Novel encapsulation and enzyme technologies for designing of new biocatalysts and biologically active compounds targeting enhancement of food quality, safety and competitiveness (RS-46010)

DOI: 10.1016/j.ijpharm.2015.05.040

ISSN: 0378-5173

PubMed: 26002567

WoS: 000356836700021

Scopus: 2-s2.0-84931275476
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URI
http://farfar.pharmacy.bg.ac.rs/handle/123456789/2468
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  • Radovi istraživača / Researchers’ publications
Institution
Pharmacy

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