Novel Feed Including Olive Oil Mill Wastewater Bioactive Compounds Enhanced the Redox Status of Lambs

Makri, Sotiria; Kafantaris, Ioannis; Savva, Salomi; Ntanou, Polyxeni; Stagos, Dimitrios; Argyroulis, Ioannis; Kotsampasi, Β.; Christodoulou, V.; Gerasopoulos, Konstantinos; Petrotos, Konstantinos; Komiotis, Dimitri; Kouretas, Demetrios

doi:10.21873/invivo.11237

Cited by 23 publications

(24 citation statements)

References 50 publications

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“…partially contributes to the beneficial effects of OMW when it is incorporated in a biofunctional feed, as it can be deduced by our results in combination with the findings of a previous relevant study (3).…”

Section: Discussionsupporting

confidence: 86%

“…Olive mill wastewater (OMW). OMW, which is a byproduct of olive oil production, was obtained from a local olive oil mill in Larissa, (Greece) without any further processing, in October 2014 (3). The chemical composition of OMW has already been published from our research group (9).…”

Section: Methodsmentioning

confidence: 99%

“…Feed and silage preparation. OMW was added in the conventional lamb feed as a corn silage with specific ratio between solid and liquid compounds, according to the process previously published by our group (3,7,32). Control silage contained 60% corn and 40% water as solid and liquid constituents, respectively, whereas experimental/biofunctional silage (i.e., feed supplemented with OMW) contained 52.5% corn and 7.5% OMW (equal to 60% solid material) and 40% water.…”

Section: Methodsmentioning

confidence: 99%

“…Nowadays, there is an increasing interest regarding the beneficial health implications of bioactive compounds and especially polyphenols. They are present in natural products (i.e., fruits, cereals, vegetables), have the ability to scavenge free radicals, and when consumed by animals contribute to their protection against chronic diseases and the improvement of their welfare (3,(27)(28)(29). Polyphenols present in olive oil and especially in its byproducts are capable of protecting human erythrocytes from oxidative damage, since they scavenge reactive oxygen species (ROS) (30).…”

mentioning

confidence: 99%

“…Polyphenols present in olive oil and especially in its byproducts are capable of protecting human erythrocytes from oxidative damage, since they scavenge reactive oxygen species (ROS) (30). Recent studies of our group have already demonstrated that feed supplemented with byproducts from the agricultural and the agro-industrial sector, such as grape pomace, olive oil mill wastes and sheep/goat whey protein, increase the antioxidant capacity of blood and of vital organs from livestock and laboratory animals, acting protectively in general (3,7,(31)(32)(33)(34)(35).…”

mentioning

confidence: 99%

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Biofunctional Feed Supplemented With By-products of Olive Oil Production Improves Tissue Antioxidant Profile of Lambs

Makri

Raftopoulou

Kafantaris

et al. 2020

In Vivo

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Background/Aim: Olive mill wastewater (OMW) is a byproduct of olive oil production. The aim of the study was to estimate the redox profile of lambs' vital organs after consumption of an OMW-supplemented feed. Materials and Methods: Twenty-four lambs received breast milk until day 15. Then, they were divided in two groups: control and OMW, n=12 each. The control group received standard ration, while the OMW group received OMW enriched feed along with mother's milk until day 42 and animals (n=6 per group) were sacrificed. The remaining 12 received the feeds until day 70 and sacrificed. Tissue samples were collected at day 42 and 70 and specific redox biomarkers were assessed. Results: Overall, the OMW feed improved tissue redox profile by affecting the glutathione S-transferase (GST) activity and γ-glutamate-cysteine ligase (γ-GCL) expression in all tested tissues. Superoxide dismutase (SOD) activity was not affected. Conclusion: The polyphenol-rich byproduct reinforced lamb redox profile and may putatively improve their wellness and productivity. Olive oil is an extract derived from olives and it has been mostly used in the Mediterranean basin since the 8 th millennium BC (1). Olive oil production rates vary between countries, such as Spain, Italy, Tunisia and Portugal, which according to the Food and Agriculture Organization of the United Nations are among the leading producers of olive oil worldwide (FAOSTAT). According to the same source, Greece is responsible for an average annual production of 344,615 tons of olive oil from 1993 to 2014 being, thus, third in the ranking of olive oil producer countries. On the basis of the Integrated Pollution Prevention and Control (IPPC) Directive, European industries produce 72% of the olive oil produced annually worldwide (Spain: 45%, Italy: 15%, Greece: 10%) (2). The extraction and production of olive oil in Greece is carried out in approximately 2,800 small-scale agro-industrial units scattered throughout the country (3, 4). Although olive oil production is a fundamental procedure for the economy of every country, it is known that it can promote environmental pollution due to the generation of two waste streams, namely olive mill residual solids and olive mill wastewater (OMW) (3). OMW is mainly characterized not only by high organic content and complex organic substances but also by the presence of diverse phenolic compounds (5). These compounds are monocyclic and polymeric aromatic molecules and are responsible for the dark color, the phytotoxicity, the antibacterial properties and the unpleasant odor of OMW (3, 5, 6). OMW has an acidic pH, ranging between 4 and 5, and mostly consists of polyphenols and tannins, while the 2-15% of its organic fraction is also rich in phenolic compounds with a concentration range between 3 and 10 g/l (3, 5). Olive mill residues are reach in polyphenolic compounds, such as caffeic acid, coumaric acid, ferulic acid, gallic acid, hydroxybenzoic acid, kaempherol and quercetin. However, oleuropein, tyrosol and hydroxytyrosol are the most cru...

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Section: Discussionsupporting

confidence: 86%

Section: Methodsmentioning

confidence: 99%