Son yıllarda emülsiyon tipi ilaç taşıyıcı sistemler üzerine araştırmalar yoğunlaşmaktadır. Gerek hazırlama yöntemlerinin göreceli olarak kolaylığı gerek mikroemülsiyonlarda olduğu gibi kararlılığı yüksek formülasyonların elde edilebilmesi ve farmasötik uygulamalarda ve endüstriyel ölçeklendirmede kolay yer bulabilmeleri nedeni ile sıklıkla tercih edilen ilaç taşıyıcı sistemler olarak tanımlanmaktadırlar. Başarılı bir emülsiyon formülasyonunun geliştirilmesinde en önemli etken, uygun bir emülgatör seçilmesidir. Emülsiyon tipi ilaç taşıyıcı sistemleri; klasik emülsiyonlar, mikroemülsiyonlar ve nanoemülsiyonlar olarak inceleyebiliriz. Mikro ve nanoemülsiyon kavramları yaygın olarak birbiri yerine kullanılan 2 kavram olmakla birlikte, bu 2 kavram arasında terminolojik, formülasyon süreçleri, damlacık boyutu-şekli ve stabiliteleri bakımından temel farklılıklar bulunmaktadır. Mikroemülsiyonlar; berrak, termodinamik olarak kararlı, izotropik sıvı karışımlardır. Yağ, su, yüzey etken madde ve yardımcı yüzey etken madde kullanılarak hazırlanırlar. Geleneksel emülsiyonlara oranla nano boyuta kadar inebilen çok küçük damlacıkları içerirler. Mikroemülsiyonlar, enerji gereksinimi olmadan kendiliğinden oluşmaları, stabilitelerinin yüksek olması, yüksek çözündürme kapasitesine sahip olmaları ve hızlı bir şekilde emilerek, yüksek biyoyararlanım göstermeleri nedeni ile hem ilaç hem de kozmetik alanda sıklıkla tercih edilen emülsiyon şekilleridir. Nanoemülsiyonlar ise nano ölçekli damlacıkların dağılımı yönünden mikroemülsiyonlara çok benzemekle birlikte, kendiliğinden oluşan mikroemülsiyonlardan farklı olarak mekanik kuvvet uygulanarak üretilirler. Nanoemülsiyonlar, hazırlanmalarında çok daha az miktarda yüzey etken maddeye ihtiyaç duyulması ve filtrasyonla sterilizasyona imkân sağlamaları gibi avantajlara sahiptirler. Bu çalışmada, mikro ve nanoemülsiyonların özelliklerinden, sağladıkları avantaj ve dezavantajlardan, formülasyon bileşenlerinden, hazırlanma yöntemlerinden ve kullanım alanlarından söz edilerek, emülsiyon sistemleri karşılaştırmalı olarak değerlendirilecektir.
Anahtar Kelimeler: Mikroemülsiyon; nanoemülsiyon; emülsiyon hazırlama yöntemleri; mikroemülsiyon ve nanoemülsiyonlar arasındaki farklar; mikro ve nanoemülsiyonların kullanım alanları
In recent years, research on emulsion type drug delivery systems has been intensified. They are often defined as preferred drug delivery systems because of the relatively ease of preparation methods and the ability to obtain stable formulations, such as microemulsions, and their availability in pharmaceutical applications and industrial scaling. The most important factor in the development of an ideal emulsion formulation is the selection of a suitable emulsifier. Emulsion- type drug delivery systems; classical emulsions, microemulsions and nanoemulsions. Although micro and nanoemulsion concepts are commonly used interchangeably, there are fundamental differences between these two concepts in terms of terminological, formulation processes, droplet size-shape and stability. Microemulsions; are clear, thermodynamically stable, isotropic liquid mixtures. They are prepared using oil, water, surfactant and cosurfactant. They contain very small droplets that can go down to nano size compared to conventional emulsions. Microemulsions are frequently preferred emulsion forms in both pharmaceutical and cosmetic fields because they form spontaneously without energy requirement and they have high stability, high dissolution capacity and high bioavailability by absorbing rapidly. Nanoemulsions are similar to microemulsions in terms of the distribution of nano-scale droplets, but they are produced by applying mechanical force unlike microemulsions. Nanoemulsions have the advantage that they require a much smaller amount of surfactant in their preparation and allow filtration sterilization. In this review, the characteristics, advantages and disadvantages, formulation components, methods of preparation and uses of the micro and nanoemulsions will be evaluated comparatively.
Keywords: Microemulsion; nanoemulsion; emulsion preparation methods; differences between microemulsion and nanoemulsions; application areas of micro and nanoemulsions
- Çelebi N. [Emulsions]. Acartürk F, Ağabeyoğlu İ, Çelebi N, Değim T, Değim Z, Doğanay T, et al, editörler. Modern Farmasötik Teknoloji. 2. Baskı. Ankara: TEB Eczacılık Akademisi; 2009. p.277-99.
- Çomoğlu T, Gönül N. Microemulsions. J Fac Pharm. 1997;26(2):95-108.
- Li H, Pan T, Cui Y, Li X, Gao J, Yang W, et al. Improved oral bioavailability of poorly water-soluble glimepiride by utilizing microemulsion technique. Int J Nanomed. 2016;11(1):3777-88. [Crossref] [PubMed] [PMC]
- Shah P, Bhalodia D, Shelat P. Nanoemulsion: a pharmaceutical review. Systematic Reviews in Pharm. 2010;1(1):24-32. [Crossref]
- Anton N, Vandamme TF. Nano-emulsions and micro-emulsions: clarifications of the critical differences. Pharm Res. 2011;28(5):978-85. [Crossref] [PubMed]
- McClements DJ. Nanoemulsions versus microemulsions: terminology, differences, and similarities. The Royal Society of Chem. 2012;8(1):1719-29. [Crossref]
- Mason TG, Wilking JN, Meleson K, Chang CB, Graves SM. Nanoemulsions: formation, structure, and physical properties. J Physics. 2006;18(41):635-66. [Crossref]
- Solans C, Solé I. Nano-emulsions: formation by low-energy methods. Curr Opin Colloid Int Sci. 2012;17(5):246-54. [Crossref]
- Tadros T, Izquierdo P, Esquena J, Solans C. Formation and stability of nano-emulsions. Adv Colloid and Int Sci. 2004;108:303-18. [Crossref] [PubMed]
- Tiwari SB, Amiji MM. Improved oral delivery of paclitaxel following administration in nanoemulsion formulations. J Nanosci Nanotechnol. 2006;6(9-10):3215-21. [Crossref] [PubMed]
- Karasulu HY. Microemulsions as novel drug carriers: the formation, stability, applications and toxicity. Expert Opin Drug Deliv. 2008;5(1):119-35. [Crossref] [PubMed]
- Nastiti CMRR, Ponto T, Abd E, Grice JE, Benson HAE, Roberts MS. Topical nano and microemulsions for skin delivery. Pharmaceutics. 2017;9(4):37. [Crossref] [PubMed] [PMC]
- Muzaffar F, Singh US, Chauhan L. Review on microemulsion as futuristic drug delivery. Int J Pharm Pharm Sci. 2013;5(3):39-53.
- Danielsson I, Friman R, Sjöblom J. Equilibria and structures of microemulsions and liquid crystals in water-surfactant-oil systems. J Colloid and Int Sci. 1982;85(2):442-51. [Crossref]
- Kreilgaard M. Influence of microemulsions on cutaneous drug delivery. Adv Drug Deliv Rev. 2002;54 Suppl 1:S77-98. [Crossref]
- Kogan A, Garti N. Microemulsions as transdermal drug delivery vehicles. Adv Colloid Interface Sci. 2006;123:369-85. [Crossref] [PubMed]
- Santos P, Watkinson AC, Hadgraft J, Lane ME. Application of microemulsions in dermal and transdermal drug delivery. Skin Pharmacol Physiol. 2008;21(5):246-59. [Crossref] [PubMed]
- Lee KL. Applications and use of microemulsions. J Power Sour. 2010;195(6):135-49.
- Lawrence MJ, Rees GD. Microemulsion-based media as novel drug delivery systems. Adv Drug Deliv Rev. 2012;64:175-93. [Crossref]
- Jha SK, Dey S, Karki S. Microemulsions-potential carrier for improved drug delivery. Asian J Biomed Pharm Sci. 2011;1(1):39-52.
- Constantinides PP. Lipid microemulsions for improving drug dissolution and oral absorption: physical and biopharmaceutical aspects. Pharm Res. 1995;12(11):1561-72. [Crossref] [PubMed]
- Akhtar N, Khan RA. Liposomal systems as viable drug delivery technology for skin cancer sites with an outlook on lipid-based delivery vehicles and diagnostic imaging inputs for skin conditions'. Prog Lipid Res. 2016;2(1):192-230. [Crossref] [PubMed]
- Moghimipour E, Salimi A, Eftekhari S. Design and characterization of microemulsion systems for naproxen. Adv Pharm Bull. 2013;3(1):63-71.
- Jain J, Fernandes C, Patravale V. Formulation development of parenteral phospholipid-based microemulsion of etoposide. AAPS PharmSci. 2010;11(2):826-31. [Crossref] [PubMed] [PMC]
- Pratap SB, Brajesh K, Jain SK, Kausar S. Development and characterization of a nanoemulsion gel formulation for transdermal delivery of carvedilol. Int J Drug Dev Res. 2012;4(1):151-61.
- Koroleva MY, Yurtov EV. Nanoemulsions: the properties, methods of preparation and promosing applications. Russian Chemical Rev. 2008;81(1):21-43. [Crossref]
- Kale SN, Deore SL. Emulsion micro emulsion and nano emulsion: a review. Syst Rev Pharm. 2017;8(1):39-47. [Crossref]
- Mahajan HS, Mahajan MS, Nerkar PP, Agrawal A. Nanoemulsion-based intranasal drug delivery system of saquinavir mesylate for brain targeting. Drug Deliv. 2014;21(2):148-54. [Crossref] [PubMed]
- Baboota S, Shakeel F, Ahuja A, Ali J, Shafiq S. Design, development and evaluation of novel nanoemulsion formulations for transdermal potential of celecoxib. Acta Pharm. 2007;57(3):315-32. [Crossref] [PubMed]
- Bhosale RR, Osmani RA, Ghodake PP, Shaikh SM, Chavan SR. Nanoemulsion: a review on novel profusion in advanced drug delivery. Indian J Pharm Biol Res. 2014;2(1):122-7. [Crossref]
- Loureiro A, Abreu AS, Sárria MP, Figueiredo MC, Saraiva LM, Bernardes GJ, et al. Functionalized protein nanoemulsions by incorporation of chemically modified BSA. RSC Adv. 2015;5(7):4976-83. [Crossref]
- Xia F, Fan W, Jiang S, Ma Y, Lu Y, Qi J, et al. Size-dependent translocation of nanoemulsions via oral delivery. ACS Applied Mat Inter. 2017;9(26):21660-72. [Crossref] [PubMed]
- Colombo M, Figueiró F, de Fraga Dias A, Teixeira HF, Battastini AMO, Koester LS. Kaempferol-loaded mucoadhesive nanoemulsion for intranasal administration reduces glioma growth in vitro. Int J Pharm. 2018;543(1-2):214-23. [Crossref] [PubMed]
- Kumar M, Misra A, Babbar AK, Mishra AK, Mishra P, Pathak K. Intranasal nanoemulsion based brain targeting drug delivery system of risperidone. Int J Pharm. 2008;358(1-2):285-91. [Crossref] [PubMed]
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