Evaluation of copaiba oil as enhancer of ibuprofen skin permeation

Abstract The administration of medications on the skin through transcutaneous routes is a practice that has been used by mankind for millennia. Some studies have been reporting the use of terpenes and natural oils rich in terpenes as an enhancer of cutaneous penetration. Copaiba oil, due to its rich content of terpenes, presents itself as a great choice of penetration enhancer for drugs administered on the skin. In this study, we developed two cream formulations containing 5% of ibuprofen (IBU) and copaiba oil: IBCO5 and IBCO10 with 5% and 10% of copaiba oil respectively. Ex vivo cutaneous penetration/permeation studies of IBU were performed using pig ear skin as biological membrane in the Franz-type diffusion cells. The steady-state flux of IBU samples, IBCO5 (35.72 ± 6.35) and IBCO10 (29.78 ± 2.41) were significantly higher when compared with control without copaiba oil (10.32 ±1.52) and with a commercial product (14.44 ± 2.39). In the penetration analysis, the amount of IBU found in the samples IBCO5 and IBCO10 was markedly higher in the dermis than epidermis. Our results showed that copaiba oil possesses attracting properties in promoting skin penetration and permeation of IBU when added into cream formulations.

Desenvolvimento e estabilidade de formulação cosmética obtida com corante natural azul / Development and stability of cosmetic formulation obtained with natural blue dye

Introdução: Dentre os corantes de fontes naturais disponíveis no mercado, os mais comuns são aquelas capazes de conferir as cores vermelha, roxa, laranja e amarela, sendo a coloração azul relativamente escassa. A espécie Ravenala madagascariensis, também conhecida como árvore dos viajantes, é uma planta oriunda da Ilha de Madagascar, África do Sul, característica por sementes recobertas por arilos fibrosos de coloração azul intensa. Objetivo: Descrever uma metodologia capaz de extrair e incorporar os corantes azuis presentes nos arilos em uma formulação dermocosmética estável. Metodologia: Foi realizado screening com distintos líquidos extratores para a obtenção do extrato dos arilos. O extrato em ciclometicone foi incorporado em preparações cosméticas empregando-se as bases Polawax® e Cold cream. Após a avaliação dos aspectos sensoriais, a formulação preparada com Polawax foi direcionada para avaliação de estabilidade acelerada (15 dias) de acordo com o protocolo definido pela ANVISA. Resultados: O melhor processo extrativo foi obtido pela utilização do ciclometicone, que é um excipiente compatível com o preparo de formulações cosméticas. O produto contendo 1% do extrato dos arilos em ciclometicone, incorporado à base Polawax, foi avaliado em relação às variáveis aspecto, cor (azul), odor, sensação ao tato e pH (5,5) e não apresentou alterações no ensaio de estabilidade acelerado. Conclusão: Com a metodologia apresentada, foi possível extrair e preparar uma formulação dermocosmética estável com nova proposta de corante azul, aplicável como excipiente para formulações.

Introduction: Among the dyes from natural sources available in the market, the most common are those capable of giving the colors red, purple, orange and yellow, being the blue coloration relatively scarce. The Ravenala madagascariensis species, also known as the traveler's tree, is a plant from Madagascar Island, South Africa, characterized by seeds covered by intense blue colored fibrous aryls. Objective: To describe a methodology capable of extracting and incorporating the blue dyes present in aryls in a stable dermocosmetic formulation. Methodology:Screening with different extracting liquids was performed to obtain the extract of the arils. The cyclomethicone extract was incorporated into cosmetic preparations using the Polawax® and Cold cream bases. After evaluation of sensory aspects, the formulation prepared with Polawax was directed to accelerated stability evaluation (15 days) according to the protocol defined by ANVISA. Results: The best extraction process was obtained by the use of cyclomethicone, which is an excipient compatible with the preparation of cosmetic formulations. The product containing 1% of the cyclomethicone aryl extract, incorporated into the Polawax base, was evaluated in relation to the variables appearance, color (blue), odor, touch sensation and pH (5.5) and showed no changes in the stability test accelerated. Conclusion:With the methodology presented, it was possible to extract and prepare a stable dermocosmetic formulation with new blue dye proposal, applicable as an excipient for formulations.