| Full text | |
| Author(s): |
Ghezzi, Martina
[1]
;
Pescina, Silvia
[1]
;
Delledonne, Andrea
[2]
;
Ferraboschi, Ilaria
[2]
;
Sissa, Cristina
[2]
;
Terenziani, Francesca
[2]
;
Remiro, Paula De Freitas Rosa
[1, 3]
;
Santi, Patrizia
[1]
;
Nicoli, Sara
[1]
Total Authors: 9
|
| Affiliation: | [1] Univ Parma, Dept Food & Drug, Parco Area Sci 27-A, I-43124 Parma - Italy
[2] Univ Parma, Dept Chem Life Sci & Environm Sustainabil, Parco Area Sci 17-A, I-43124 Parma - Italy
[3] Univ Campinas UNICAMP, Sch Chem Engn, Dept Engn Mat & Bioproc, Av Albert Einstein 500, Cidade Univ, BR-13083852 Campinas - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | PHARMACEUTICS; v. 13, n. 9 SEP 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
Imiquimod (IMQ) is an immunostimulant drug approved for the topical treatment of actinic keratosis, external genital-perianal warts as well as superficial basal cell carcinoma that is used off-label for the treatment of different forms of skin cancers, including some malignant melanocytic proliferations such as lentigo maligna, atypical nevi and other in situ melanoma-related diseases. Imiquimod skin delivery has proven to be a real challenge due to its very low water-solubility and reduced skin penetration capacity. The aim of the work was to improve the drug solubility and skin retention using micelles of d-alpha-tocopheryl polyethylene glycol 1000 succinate (TPGS), a water-soluble derivative of vitamin E, co-encapsulating various lipophilic compounds with the potential ability to improve imiquimod affinity for the micellar core, and thus its loading into the nanocarrier. The formulations were characterized in terms of particle size, zeta potential and stability over time and micelles performance on the skin was evaluated through the quantification of imiquimod retention in the skin layers and the visualization of a micelle-loaded fluorescent dye by two-photon microscopy. The results showed that imiquimod solubility strictly depends on the nature and concentration of the co-encapsulated compounds. The micellar formulation based on TPGS and oleic acid was identified as the most interesting in terms of both drug solubility (which was increased from few mu g/mL to 1154.01 +/- 112.78 mu g/mL) and micellar stability (which was evaluated up to 6 months from micelles preparation). The delivery efficiency after the application of this formulation alone or incorporated in hydrogels showed to be 42- and 25-folds higher than the one of the commercial creams. (AU) | |
| FAPESP's process: | 19/19151-5 - Evaluation of imiquimod penetration into skin and buccal mucosa before and after micronization using supercritical technology |
| Grantee: | Paula de Freitas Rosa Remiro |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |