Non-toxic Salvia sclareoides Brot. extracts as a source of functional food ingredients: Phenolic profile, antioxidant activity and prion binding properties

Salvia sclareoides is an aromatic herb native to Portugal, of which phenolic content (Folin–Ciocalteau method), chemical profile (HPLC/DAD), antioxidant activity (DPPH, β-carotene/linoleic acid assays), acute toxicity (MTT method, adapted for non-adherent cells), genotoxicity (short-term chromosomal aberration assay) and prion binding properties were evaluated in the acetone, water, ethanol, methanol and n-butanol extracts. The latter presented the highest phenolic content and antioxidant activity (DPPH assay), and was the single one with the flavonoids (+)-catechin, kaempferol O-glucoside and quercetin. Vanillic acid was the major component of all extracts but gallic, gentisic, caffeic, syringic, coumaric and ferulic acids were also found in some extracts. Only the n-butanol extract had components binding to the cellular form of human prion protein detected by NMR which showed specificity for two regions of the folded domain and for the unstructured N-terminal region. Extracts were not cytotoxic nor genotoxic, reinforcing the potential of S. sclareoides for nutraceutical purposes.

Description

Estudo de produção agronómica de espécis da salvia com vista à avaliação dos seus constituintes para o potencial controlo da doença de Alzaimer

Keywords

Salvia sclareoides Phenolic profile Antioxidant activity Cytotoxicity Genotoxicity Prion binding

URI

http://hdl.handle.net/10400.15/882

Citation

Justino,J.;Rauter,A.;Dias,C.;Martins.A.;Branco,I.;Goulart,M. (2012).Non-toxic Salvia sclareoides Brot. extracts as a source of functional food ingredients: Phenolic profile, antioxidant activity and prion binding properties.Food Chemistry,132,1930-1935. Disponível em : http://www.sciencedirect.com/science/article/pii/S0308814611017833