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Title: Chemical Composition and Biological Activities of Centranthus longiflorus Stems Extracts Recovered Using Ired-Irrad®, an Innovative Infrared Technology, Compared to Water Bath and Ultrasound
Authors: Rajha, Hiba N.
Chokr, Ali
Safi, Carl
van den Broek, Lambertus
van Erven, Gijs
Maroun, Richard
Debs, Esperance 
Rammal, Hassan
Louka, Nicolas M.
Affiliations: Department of Biology 
Editors: Alexander Prosekov
Natalia Politaeva
Keywords: Centranthus longiflorus
Antibacterial activity
Phenolic compounds
Issue Date: 2023-05-30
Publisher: MDPI
Part of: life
Volume: 13
Issue: 6
Start page: 1
End page: 19
Extraction of polyphenols from Centranthus longiflorus stems was conducted using ultrasound and infrared Ired-Irrad® techniques, and compared to the conventional water bath method. Response surface methodology was used to analyse the effect of time, temperature, and ethanol percentage, as well as to optimize the three extraction methods. The highest phenolic content (81 mg GAE/g DM) and antioxidant activity (76% DPPH inhibition) were recorded with the Ired-Irrad® extract obtained under the optimal conditions: 55 °C, 127 min, 48% (v/v) ethanol. Biological activities (antioxidant, antibacterial and antibiofilm) of the three extracts were assessed. All C. longiflorus stems extracts showed limited antibacterial effects regardless of the extraction method (MIC = 50 mg/mL), whereas Ired-Irrad® extract exhibited the highest biofilm eradication and prevention capacities (93% against Escherichia coli and 97% against Staphylococcus epidermidis, respectively). This bioactivity is likely related to abundant caffeoylquinic acid and quercetin rutinoside, as identified by RP-UHPLC-PDA-MS analysis. The results obtained further promote the effectiveness of Ired-Irrad® as a highly flexible and cost-efficient extraction technique.
ISSN: 2075-1729
DOI: 10.3390/life13061288
Open URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Biology

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