Abstract
The purpose of this study was to evaluate the effect of topical application of nanoliposomal avocado/soybean unsaponifiables (NANOCEN) on inflammation inhibition and pain relief in mice. NANOCEN was prepared by the injection method and characterized for vesicle size, charge, entrapment efficiency, in vitro release, and 1-month vesicle stability. The analysis of ASU formulation showed that liposomes had an average size of around 146 nm with a surface charge of − 43 mV. SEM and TEM imaging confirmed the spherical shape of the nanovesicles in ASU formulation. Moreover, ASU nanoliposomes had a high entrapment efficiency (96%) and exhibited significantly (p < 0.0001) sustained release of the drug in vitro model. The topical NANOCEN (ASU 2%) showed robust anti-inflammatory (p < 0.01) and analgesic effect (p < 0.01) superior to ibuprofen 5%. The histopathology of the inflamed tissues confirmed that the topical ASU formulation potentially (p < 0.001) inhibited infiltration of inflammatory cells. Our findings suggest that the topical formulation of NANOCEN may have local applications for pain relief in medicine.
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Acknowledgements
This research has been supported by Tehran University of Medical Sciences and Health Services grant (no. 96-04-158-37121).
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Conceptualization: Ramin Goudarzi
Data curation: Alireza Partoazar, Sima Amini
Formal analysis: Alireza Partoazar
Funding acquisition: Tehran University of Medical Sciences
Methodology: Alireza Partoazar, Sima Amini
Project administration: Ramin Goudarzi
Resources: Ramin Goudarzi, Alireza Partoazar
Supervision: Alireza Partoazar
Validation: Ahmad Reza Dehpour
Writing—original draft: Ramin Goudarzi, Sima Amini
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The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the article. Dr. Ramin Goudarzi owns equity in Pharmin USA which manufactures and distributes Arthrocen.
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Goudarzi, R., Amini, S., Dehpour, A.R. et al. Estimation of Anti-inflammatory and Analgesic Effects of Topical NANOCEN (Nanoliposomal Arthrocen) on Mice. AAPS PharmSciTech 20, 233 (2019). https://doi.org/10.1208/s12249-019-1445-5
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DOI: https://doi.org/10.1208/s12249-019-1445-5