Anti-inflammatory and Antioxidant Properties of Almond-Skin Acetonic Extract in Zebrafish (Danio rerio) Copper-Sulphate-induced Inflammation

Rúben Barbosa; Ana Martins; Ivo Vaz Oliveira; Maria Inês Dias; Sandra M. Monteiro; Carlos Venâncio; Luís Félix

doi:10.1055/a-2654-9426

Planta Medica, Inhaltsverzeichnis

Planta Med
DOI: 10.1055/a-2654-9426

Original Papers

Anti-inflammatory and Antioxidant Properties of Almond-Skin Acetonic Extract in Zebrafish (Danio rerio) Copper-Sulphate-induced Inflammation

Authors

Rúben Barbosa

¹School of Life and Environmental Sciences (ECVA), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal
Ana Martins

¹School of Life and Environmental Sciences (ECVA), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal
Ivo Vaz Oliveira

²Centre for the Research and Technology of Agroenvironmental and Biological Sciences, CITAB, Inov4Agro, UTAD, Vila Real, Portugal
Maria Inês Dias

³Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, Bragança, Portugal

⁴Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, Bragança, Portugal
Sandra M. Monteiro

²Centre for the Research and Technology of Agroenvironmental and Biological Sciences, CITAB, Inov4Agro, UTAD, Vila Real, Portugal
Carlos Venâncio

²Centre for the Research and Technology of Agroenvironmental and Biological Sciences, CITAB, Inov4Agro, UTAD, Vila Real, Portugal

⁵Animal and Veterinary Research Centre (CECAV), UTAD, Vila Real, Portugal
Luís Félix

²Centre for the Research and Technology of Agroenvironmental and Biological Sciences, CITAB, Inov4Agro, UTAD, Vila Real, Portugal

Abstract

This study aimed to assess the properties of an acetone-based almond-skin (Prunus dulcis) extract and examine its effects on chemically induced inflammation by evaluating associated oxidative changes in an in vivo model. The phytochemical composition was analysed by LC-MS/MS while the antioxidant capacity was evaluated using DPPH, ABTS, and FRAP assays. The neutrophil migration was assessed using a CuSO₄-induced inflammation model in a transgenic zebrafish line (Tg(mpx : GFP)ⁱ¹¹⁴). Three days post-fertilisation zebrafish larvae were treated with 5 and 25 µg/mL extract for 1 h and then exposed to 10 µM CuSO₄ for 40 min. Following exposure, various biochemical markers were assessed, along with neurobehavioral effects. The polyphenolic profile revealed a high flavonoid content and good antioxidant properties confirmed by the DPPH, ABTS, and FRAP assays. The extract reduced neutrophil migration in a concentration-dependent manner, indicating anti-inflammatory activity. Additionally, it decreased reactive oxygen species (ROS) production and cell death without affecting mitochondrial membrane potential. The extract also mitigated oxidative damage, as shown by reduced malondialdehyde and protein carbonylation levels, alongside decreased antioxidant response markers. Neurobehavioral effects induced by CuSO₄ were alleviated, as evidenced by improved touch-evoked responses. These findings suggest that almond-skin extract holds significant antioxidant and anti-inflammatory properties, possibly through modulation of ROS and calcium signalling pathways.

Keywords

antioxidant - anti-inflammatory - zebrafish - copper - almond skin

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Referenzen

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