2019
DOI: 10.1111/1471-0307.12659
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Angiotensin‐converting enzyme inhibition, antioxidant activity and cytotoxicity of bioactive peptides from fermented bovine colostrum

Abstract: Fermented bovine colostrum rich in bioactive peptides was obtained using Candida lipolytica strains in co-culture with kefir grains. During fermentation, the pH and total titratable acidity of the product were daily measured. The hydrolysis degree and the electrophoretic pattern of watersoluble extracts (WSE) of fermented colostrum were analysed. Fractions enriched in peptides with a molecular weight lower than 10 kDa were separated by ultracentrifugation. They showed better modulation of angiotensin-convertin… Show more

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Cited by 45 publications
(26 citation statements)
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“…The capacity to scavenge ABTS free radicals was evaluated by Trolox equivalent antioxidant capacity (TEAC) assay [ 74 ]. Briefly, the stock solution of 7 mM ABTS containing 2.45 mM potassium persulfate was diluted to reach an OD value of 0.7 ± 0.02 at 734 nm (control).…”
Section: Methodsmentioning
confidence: 99%
“…The capacity to scavenge ABTS free radicals was evaluated by Trolox equivalent antioxidant capacity (TEAC) assay [ 74 ]. Briefly, the stock solution of 7 mM ABTS containing 2.45 mM potassium persulfate was diluted to reach an OD value of 0.7 ± 0.02 at 734 nm (control).…”
Section: Methodsmentioning
confidence: 99%
“…From our previous results, several yeast strains were identified as active producers of lipase and protease by using bovine colostrum and cow milk fat as substrates [26][27][28]. Y. lipolytica A-101 and W29 produced a lipase after 54 h of incubation at 25 • C (2.3 mm) on the spirit blue agar medium supplemented with butter fat [29].…”
Section: Discussionmentioning
confidence: 99%
“…Hence, the antimicrobial potential of the fermented products could be associated with the production of organic acids, also including small chain saturated fatty acids, peptides (bacteriocins), carbon dioxide, hydrogen peroxide, ethanol, and diacetyl [30]. Our previous results stated that the fermented product obtained by bovine colostrum fermentation with kefir grains enhanced with a selected Candida lypolitica inoculum showed an inhibition zone ranging between 3.0 and 5.0 mm against B. subtilis MIUG B1, while for A. niger MIUG M64, spore inhibition was observed [26,28].…”
Section: Discussionmentioning
confidence: 99%
“…However, the exact mechanism underlying the antioxidant activity and the structure–antioxidant activity relationship of peptides are not fully understood. Even so, many studies have shown that these antioxidant peptides are capable of scavenging free radicals (Gallego, Mora, & Toldrá, 2018; Gaspar‐Pintiliescu et al., 2020; Solieri et al., 2015; Tkaczewska et al., 2019), lipid peroxidation (Ayyash, Liu, et al., 2019; Jemil, Mora, et al., 2016; Tonolo et al., 2019), reducing ferric ion (Fe 3+ ) to ferrous ion (Fe 2+ ) (Cao et al., 2019; Jemil, Mora, et al., 2016; Tkaczewska et al., 2019), and chelating the transition of metal ions (Jemil, Mora, et al., 2016; Tkaczewska et al., 2019; Yu et al., 2020). As compared to the parent proteins, peptides exert greater antioxidant activities due to the higher accessibility of the functional site chain (R‐group) to the reactive species and the electron‐dense peptide bonds (Siow & Gan, 2016).…”
Section: Structure–activity Relationship Of Bpsmentioning
confidence: 99%