Differences in Chemical Composition and Antioxidant Activity of Three Propolis Samples Collected in the Same Apiary
Öz
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Propolis, a complex
mixture of resinous and balsamic material collected by honeybees from plant
material and mixed with bees’ salivary secretions, is composed by different
groups of compounds that have been linked with diverse bioactivities. In
particular, flavonoids, phenolic acids and their esters were associated to
valuable biological properties such as antioxidant and free radical
scavenging1,2. Propolis possess substantial variability of
chemical composition and bioactive profiles, even from the same origin but
collected in different years3. However, Portuguese propolis
samples from an apiary named Gerês (G), normally obtained by mixing propolis
from three places - Bugalho (b), Toutelo (t) and Felgueiras (f) - show
similar chemical and biological profiles over the years (Freitas, under
reviewing). Recently, a new propolis place - Roca (r) - was added to the
apiary. In this work we have studied three Gerês propolis samples collected
in 2017 (G17), but composed by different combinations of source places: G17-r;
G17-rt and G17-tf. Total phenolic, total flavonoid and ortho-diphenol
contents were determined for the ethanolic extracts (EE) obtained from the
three propolis samples and DPPH• scavenging assay was performed to evaluate the
in vitro antioxidant capacity of
G17.EEs. All propolis samples showed antioxidant capacity, having one of the
extracts, namely G17-r.EE, the highest scavenging ability of DPPH•. This extract was also
the one with higher content in phenolic, flavonoid and ortho-diphenol
compounds. Note: Ana
Freitas and Ana Gomes contributed equally to this work. Acknowledgments: Financial support provided by
FCT (PD/BD/128276/2017), under the Doctoral Programme Agrichains -
PD/00122/2012. |
Anahtar Kelimeler
Kaynakça
- 1. Silva-Carvalho, R., Baltazar, F., Almeida-Aguiar, C. 2015. Evidence-Based Complementary and Alternative Medicine 2015.
- 2. Cruz, M., Antunes, P., Paulo, L., Ferreira, A. M., Cunha, A., Almeida-Aguiar, C., Oliveira, R. 2016. RSC Advances 6(55), 49806-49816.
- 3. Veloz, J. J., Saavedra, N., Lillo, A., Alvear, M., Barrientos, L., Salazar, L. A. 2015. BioMed Research International 2015.