Design and optimization of a new self-nanoemulsifying drug delivery system

Wang, Lijuan; Dong, Jianfeng; Chen, Jing; Eastoe, Julian; Li, Xuefeng

doi:10.1016/j.jcis.2008.10.077

Cited by 351 publications

(228 citation statements)

References 31 publications

(32 reference statements)

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“…Equally an adequate dosage form must be 115 chosen for the administration of these lipid systems, because liquids produce some disadvantages; the large quantity of surfactants in the formulations can induce gastrointestinal irritation (Tang et al, 2008). An optimal alternative to tackle these disadvantages are hard gelatine capsules (Wang et al, 2009;Halbaut et al, 1996), pellets (Abdalla et al, 2008), tablets (Attama et al, 2003), gelatine hollow type suppositories (Kim and Ku, 2000), and so on. There 120 have been relatively few studies that introduce SNEEDS in a systemic way, especially with respect to dosage form development, preparation techniques (Tang et al, 2008) and quantification of the release patterns of these emulsions from their dosage forms (Nazzal et al, 2002).…”

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confidence: 99%

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Design and optimization of self-nanoemulsifying drug delivery systems (SNEDDS) for enhanced dissolution of gemfibrozil

Villar

Naveros

Campmany

et al. 2012

International Journal of Pharmaceutics

140

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Self nanoemulsifying drug delivery systems of gemfibrozil were developed under Quality by Design approach for improvement of dissolution and oral absorption. Preliminary screening was performed to select proper components combination. Box-Behnken experimental design was employed as statistical tool to optimize the formulation variables, X1 (Cremophor® EL), X2 (Capmul® MCM -C8), and X3 (lemon essential oil). Systems were assessed for visual characteristics (emulsification efficacy), turbidity, droplet size, polydispersity index and drug release. Different pH media were also assayed for optimization. Following optimization, the values of formulation components (X1, X2, and X3) were 32. 43%, 29.73% and 21.62 %, respectively (16.22% of gemfibrozil). Transmission electron microscopy demonstrated spherical droplet morphology. SNEEDS release study was compared to commercial tablets. Optimized SNEDDS formulation of gemfibrozil showed a significant increase in dissolution rate compared to conventional tablets. Both formulations followed Weibull mathematical model release with a significant difference in td parameter in favour of the SNEDDS. Equally amodelistic parameters were calculated being the dissolution efficiency significantly higher for SNEDDS, confirming that the developed SNEDDS formulation was superior to commercial formulation with respect to in vitro dissolution profile. This paper provides an overview of the SNEDDS of the gemfibrozil as a promising alternative to improve oral absorption. She is an expert in nanotechnology (colloids and nanoparticles) with a wide experience. She has extensive curriculum of published paper about this subject Jose Luis Arias Mediano Ph. D. Professor reseracher, Pharmacy and Pharmaceutical Technology , University of Granada jlarias@ugr.es He is an expert in nanotechnology (colloids and nanoparticles) with a wide experience in this type of investigation. Also is reviewer in specialized pharmaceutical journal. He is an expert in nanotechnology (colloids and nanoparticles) with a wide experience in this type of investigation. Also is reviewer of Pharmaceutical science journals. IJP AUTHOR CHECKLISTDear Author, It frequently happens that on receipt of an article for publication, we find that certain elements of the manuscript, or related information, is missing. This is regrettable of course since it means there will be a delay in processing the article while we obtain the missing details.In order to avoid such delays in the publication of your article, if accepted, could you please run through the list of items below and make sure you have completed the items. Overall Manuscript Electronic artwork format? ---------------------------------------------------TIFF

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“…Besides their small droplets size also provides a large interfacial surface area for drug release and absorption and hence bioavailability (Wang et al, 2009). For this reason it has been developed self-nanoemulsifying drug delivery system 750 (SNEDDS) in which Gem is loaded in the oily phase.…”

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confidence: 99%

Design and optimization of self-nanoemulsifying drug delivery systems (SNEDDS) for enhanced dissolution of gemfibrozil

Villar

Naveros

Campmany

et al. 2012

International Journal of Pharmaceutics

140

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“…Malcolmson et al (1998) and Warisnoicharoen et al (2000) also reported that particle size depends on the surfactant structure and chain length. Wang et al (2009) found that structure of Tween had a greater effect on the decrease of droplet size than that of Span. These authors also found that the formation of nanoemulsions with smaller droplet size depends on the CH chain length of the surfactant.…”

Section: Resultsmentioning

confidence: 97%

Development of Paprika Oleoresin Dispersions for Improving the Bioaccessibility of Carotenoids

Pascual-Mathey¹

2018

Rev. Mex. Ing. Quim.

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Red pepper (Capsicum annuum L.) oleoresin contain a diversity of carotenoids, which has been associated with lower risk for different chronic diseases like various types of cancer, cardiovascular disease and age-related macular degeneration. However, they are very sensitive to pro-oxidant conditions, heat and light. Previous attempts have been made to improve bioavailability and stability of carotenoids, of which emulsions have proven to be a feasible method. Conventional (CE) and nano (NE) emulsions loaded with paprika oleoresin carotenoids (POC; 1% wt/wt) were fabricated using surfactants blend (Tween 40 and Span 20) with a hydrophilic-lipophilic balance (HLB), ranging from 12 to 15.6, and surfactant: POC ratio of 1:1 (wt/wt). POC bioaccessibility was studied using an in vitro model to simulate oral, gastric and small intestine phases of the gastrointestinal tract (GIT). In general, higher HLB values produced CE's and NE's with smaller particle size and negative value of zeta potential. The smaller the droplet size, the higher was POC bioaccessibility. NE prepared with a HLB of 15.6 had a particle size of 38.93 nm and a bioaccessibility of 74%. Bioaccessibility of unemulsified POC was practically nil. Conventional and nanoemulsions protected paprika oleoresin carotenoids deterioration during simulated gastrointestinal tract.Keywords: nanoemulsions, paprika oleoresin, gastrointestinal tract, bioaccessibility. ResumenLa oleorresina de paprika (Capsicum annuum L.) contiene una diversidad de carotenoides que se han relacionado con la disminución de enfermedades crónico degenerativas, cáncer, enfermedades cardiovasculares y degeneración macular. Los carotenoides son muy sensibles a condiciones pro-oxidantes, calor y luz, por lo que algunas investigaciones se han enfocado en mejorar su biodisponibilidad y estabilidad, de las cuales las emulsiones han demostrado ser un buen método. En este trabajo, se realizaron emulsiones convencionales (CE) y nanoemulsiones (NE) de carotenoides de oleorresina de paprika (POC, 1% p/p) utilizando surfactantes (Tween 40 y Span 20) con un balance hidrófilo-lipófilo (HLB) de 12 y 15.6, a una relación surfactante: POC de 1:1 (p/p). La bioaccesibilidad se estudió utilizando un modelo gastrointestinal (GIT) para simular las fases oral, estómago e intestino delgado. Los valores más altos de HLB produjeron CE y NE con menores tamaños de partícula y potencial zeta negativo. A menor tamaño de gota, mayor fue la bioaccesibilidad, mientras que para POC no emulsificada fue prácticamente nula. La NE con HLB de 15.6 mostró un tamaño de partícula de 38.93 nm y bioaccesibilidad del 74%. Las NE y CE protegieron los carotenoides de la oleorresina de paprika al pasar el GIT simulado.

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“…The third class of emulsions is miniemulsion (nanoemulsion) which has droplet size between macroemulsion and microemulsion (100-400 nm). These emulsions have appearance of white-blue color [11,12,17,[42][43][44]. Macroemulsions and miniemulsions are thermodynamically unstable but can be kinetically stable which means that under a certain condition of pressure and temperature their stability is dependent on time.…”

Section: Emulsionsmentioning

confidence: 99%