| Autor: |
Fonseca-Santos B; Rector Miguel Calmon Avenue, Department of Biotechnology, Health Sciences Institute, Federal University of Bahia (UFBA), Campus of Canela, Salvador 40110-902, BA, Brazil.; School of Pharmaceutical Sciences, São Paulo State University-UNESP, Araraquara 14800-903, SP, Brazil., Araujo GA; School of Pharmaceutical Sciences, São Paulo State University-UNESP, Araraquara 14800-903, SP, Brazil., Ferreira PS; School of Pharmaceutical Sciences, São Paulo State University-UNESP, Araraquara 14800-903, SP, Brazil., Victorelli FD; School of Pharmaceutical Sciences, São Paulo State University-UNESP, Araraquara 14800-903, SP, Brazil., Pironi AM; School of Pharmaceutical Sciences, São Paulo State University-UNESP, Araraquara 14800-903, SP, Brazil., Araújo VHS; School of Pharmaceutical Sciences, São Paulo State University-UNESP, Araraquara 14800-903, SP, Brazil., Carvalho SG; School of Pharmaceutical Sciences, São Paulo State University-UNESP, Araraquara 14800-903, SP, Brazil., Chorilli M; School of Pharmaceutical Sciences, São Paulo State University-UNESP, Araraquara 14800-903, SP, Brazil. |
| Abstrakt: |
Skin inflammation is a symptom of many skin diseases, such as eczema, psoriasis, and dermatitis, which cause rashes, redness, heat, or blistering. The use of natural products with anti-inflammatory properties has gained importance in treating these symptoms. Ursolic acid (UA), a promising natural compound that is used to treat skin diseases, exhibits low aqueous solubility, resulting in poor absorption and low bioavailability. Designing topical formulations focuses on providing adequate delivery via application to the skin surface. The aim of this study was to formulate and characterize lipid-surfactant-based systems for the delivery of UA. Microemulsions and liquid crystalline systems (LCs) were characterized by polarized light microscopy (PLM), rheology techniques, and textural and bioadhesive assays. PLM supported the self-assembly of these systems and elucidated their formation. Rheologic examination revealed pseudoplastic and thixotropic behavior appropriate, and assays confirmed the ability of these formulations to adhere to the skin. In vivo studies were performed, and inflammation induced by croton oil was assessed for response to microemulsions and LCs. UA anti-inflammatory activities of ~60% and 50% were demonstrated by two microemulsions and 40% and 35% by two LCs, respectively. These data support the continued development of colloidal systems to deliver UA to ameliorate skin inflammation. |
