doi: 10.17113/ftb.54.03.16.4622 

Antioxidant and Angiotensin-Converting Enzyme Inhibitory Activity of Eucalyptus camaldulensis and Litsea glaucescens Infusions Fermented with Kombucha Consortium

Claudia I. Gamboa-Gómez¹, Rubén F. González-Laredo¹, José Alberto Gallegos-Infante¹, Mª del Mar Larrosa Pérez², Martha R. Moreno-Jiménez¹, Ana G. Flores-Rueda¹ and Nuria E. Rocha-Guzmán^1*

¹Durango Institute of Technology, Felipe Pescador 1830 Ote., MX-34080 Durango, Durango, Mexico
²European University of Madrid, Calle Tajo, s/n, Villaviciosa de Odón, ES-28670 Madrid, Spain



 

Article history:
Received  January 26, 2016
Accepted  May 11, 2016

 

Key words:
herbal infusions, fermented beverages, kombucha, antioxidant activity, polyphenols

 

Summary:
Physicochemical properties, consumer acceptance, antioxidant and angiotensin-converting enzyme (ACE) inhibitory activities of infusions and fermented beverages of Eucalyptus camaldulensis and Litsea glaucescens were compared. Among physicochemical parameters, only the pH of fermented beverages decreased compared with the unfermented infusions. No relevant changes were reported in consumer preference between infusions and fermented beverages. Phenolic profile measured by UPLC MS/MS analysis demonstrated significant concentration changes of these compounds in plant infusions and fermented beverages. Fermentation induced a decrease in the concentration required to stabilize 50 % of DPPH radical (i.e. lower IC50). Additionally, it enhanced the antioxidant activity measured by the nitric oxide scavenging assay (14 % of E. camaldulensis and 49 % of L. glaucescens); whereas relevant improvements in the fermented beverage were not observed in the lipid oxidation assay compared with unfermented infusions. The same behaviour was observed in the inhibitory activity of ACE; however, both infusions and fermented beverages had lower IC50 than positive control (captopril). The present study demonstrated that fermentation has an influence on the concentration of phenolics and their potential bioactivity. E. camaldulensis and L. glaucescens can be considered as natural sources of biocompounds with antihypertensive potential used either as infusions or fermented beverages.




 
 

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