Copaiba oleoresin has topical antinociceptive activity in a UVB radiation-induced skin-burn model in mice.

Copaiba oleoresin has topical antinociceptive activity in a UVB radiation-induced skin-burn model in mice.:

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Copaiba oleoresin has topical antinociceptive activity in a UVB radiation-induced skin-burn model in mice.

J Ethnopharmacol. 2019 Dec 12;:112476

Authors: Becker G, Brusco I, Casoti R, Lay Marchiori MC, Cruz L, Trevisan G, Oliveira SM

Abstract

ETHNOPHARMACOLOGICAL RELEVANCE: Copaiba oleoresin, extracted from Copaifera L., is used as a wound healing, analgesic, antimicrobial and, mainly, anti-inflammatory agent. Thus, in this study we investigated the antinociceptive and anti-inflammatory effects of a topical formulation containing Copaiba oleoresin (3%) in a UVB radiation-induced skin burn model (0.75 J/cm2) in mice and performed a cream-formulation stability study.

MATERIALS AND METHODS: The chemical composition of Copaiba oleoresin was analyzed using gas chromatography (GC-MS). The topical antinociceptive (evaluated through mechanical allodynia and thermal hyperalgesia) and the anti-inflammatory (dermal thickness and inflammatory cell infiltration) effects of treatments were assessed. The cream-formulation stability study was performed after two months, and organoleptic characteristics, pH, spreadability and rheological characteristics were analyzed.

RESULTS: Copaiba oleoresin cream was able to prevent UVB radiation-induced mechanical allodynia on the 2nd, 3rd and 4th day after UVB radiation exposure with a maximum inhibition (Imax) of 64.6 ± 7% (2nd day) observed; it also reduced the thermal hyperalgesia on the 1st and 2nd days post UVB radiation, with a Imax of 100% observed on the 2nd day. Moreover, topical treatment with Copaiba oleoresin cream inhibited the inflammatory cell infiltration, but did not reduce the dermal thickness. Such effects can be attributed, at least in part, to the presence of biological components, such as β-caryophyllene and other sesquiterpenes identified by GC-MS.

CONCLUSION: Our results demonstrate that the topical formulation containing Copaiba oleoresin presented antinociceptive and anti-inflammatory effects in mice subjected to a UVB radiation and that the cream-formulation was stable for two months. Thus, use of Copaiba oleoresin is a promising strategy for the treatment of inflammatory pain associated with sunburn.

PMID: 31838179 [PubMed - as supplied by publisher]

Copaifera

Plants

Description

Copaifera is a genus of flowering plants in the legume family, Fabaceae. The scientific name means "copal-bearer", since economically important resins and essential oils can be acquired from them. They are also important for production of biodiesel and wood, especially Copaifera langsdorffii. Wikipedia

Scientific name: Copaifera

Higher classification: Legumes

Order: Fabales

Rank: Genus

Lower classi