Gelatin-based microspheres crosslinked with glutaraldehyde and rutin oriented to cosmetics

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Graziola, Fabiana ; Candido, Thalita Marcilio ; de Oliveira, Camila Areias ; Peres, Daniela D'Almeida ; Issa, Michele Georges ; Mota, Joana ; Rosado, Catarina ; Consiglieri, Vladi Olga ; Kaneko, Telma Mary ; Robles Velasco, Maria Valeria ; Baby, Andre Rolim

• Document type: Journal article
• Source: Brazilian Journal of Pharmaceutical Sciences; v. 52, n. 4, p. 603-612, OCT-DEC 2016.
• Web of Science Citations: 5

Abstract

Glutaraldehyde (GTA) has been extensively used as a gelatin crosslinking agent, however, new natural ones have been suggested as more biocompatible. Polyphenols are possible candidates and the flavonols, such as rutin (RUT), also exhibit potential synergism with sunscreens and antioxidant agents used in cosmetics. In this work, gelatin microspheres (M0) were obtained and crosslinked with GTA 10 mM (MG) or RUT 10 mM (MR), dissolved in acetone: NaOH 0,01M (70:30 v/v). MG exhibited crosslinking extent of 54.4%. Gelatin, M0, MG and MR did not elicit any signs of skin damage, regarding the formation of erythema, the barrier function disruption and negative interference in the stratum corneum hydration. Oily dispersions containing M0, MG or MR, isolated or combined with benzophenone-3 or octyl methoxycinnamate, suggested that the microspheres, at a 5.0% w/w, had no additional chemical or physical photoprotective effect in vitro. Crosslinking with RUT had occurred, but in a lower degree than GTA. Microspheres had not improved sun protection parameters, although, non-treated gelatin interfered positively with the SPF for both UV filters. The in vivo studies demonstrated that these materials had very good skin compatibility. (AU)

• FAPESP's process: 12/04435-9 - Gelatin particle systems containing flavonoid: development, characterization and application in sunscreen formulations
• Grantee: André Rolim Baby
• Support Opportunities: Regular Research Grants
• FAPESP's process: 12/19972-0 - Technological development, safety assessment and clinical effectiveness of rutin-loaded gelatin micro/nanoparticles
• Grantee: Camila Areias de Oliveira
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)