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Webinar #1: Oxidative Stress in Animal Production

Thu, 04 Mar 2021 10:00:39 GMT

Speakers: Prof Peter Surai, Dr Mario Estevez and Dr. Pierre-André Geraert

The basis of oxidative stress (Prof Peter Surai) and its impact on meat quality (Dr Mario Estevez) & share questions and answers during the roundtable.

Questions and Anwers

Q: A comment on flavonoïds, even if they are absorbed at low level some of them play an indirect role in inducing at gene level endogenous antioxidant systems.

Reinforcing the anti-oxidant defenses of the gut definitely improve its resistance to aggressive factors such as dietary ones (induced by mycotoxins for instance) or induced by microorganisms (bacteria, virus). Polyphenols and flavonoids may bring antioxidant benefits reinforcing the host response to xenobiotics.

Q: Is there a significant difference on the meat between chicken fed with Organic selenium and another fed with mineral selenium?

We assume that you mean organoleptic properties: improving the antioxidant status of the meat often is "indirectly" perceived by consumers influencing their choice. The conservation of the meat is also improved reducing the changes in color, texture,.. during storage or processing. Drip losses are clearly reduced when birds receive an organic selenium source compared to a mineral one.

Q: Oxidative impaires male fertility .. What about female ?

Indeed, the spermatozoids are clearly affected by oxidation. But ovocytes and particularly their membrane is also rich in polyunsaturated fats and prone to oxidation. Most parameters linked to egg production such as the export of vitellogenin by the hepatocyte toward the ovary is conditioned by membrane phospholipids. Preserving them from oxidation will help to enhance fertility. Hatchability is also clearly affected by oxidative stress situations and can be restored by using the right antioxidant solution.

Q: You said free radicals are used as weapons against bacteria, play a role of messenger: what about (too) high antioxidant intake?

Indeed, you're right. Free radicals are normal elements in the metabolism that help our body to get rid of xenobiotics. Antioxidant have to be balanced and an excess of one will not compensate for a deficiency of another and might event counteract the benefits of their nature. Proposing a balanced of efficient antioxidant solutions is thus key to improve animal performance under challenging conditions.

Q: Is oxidative stress affecting fertility ?

yes indeed, hot conditions and ageing are good examples of oxidative stress that affect fertility. An optimal balance of antioxidants has long been shown to improve fertility in a wide range of animal species including human.

Q: Is oxidized fat in the diet a source of oxidative stress?

Yes, oxidized fat can induce some toxicity depending the level and thus increase oxidative stress to the animal. It has long been worked at, but nowadays it is sometimes difficult to link the actual used index (iodine, …) to the decreased performance. However, lipid peroxydes have clearly a negative effect on sensitive molecules to oxidation. Antioxidant systems can help to alleviate those negative effects, particularly the selenoprotein Glutathione peroxidase 2 have been demonstrated to detoxify different lipid peroxides.

Scientific Background on Oxidative Stress in Animal Production

Thu, 04 Mar 2021 09:59:49 GMT

Speakers: Prof Peter Surai, Dr Mario Estevez and Dr Pierre-André Geraert

Prof Peter Surai and Dr Mario Estevez share their expert insights on Scientific Background on Oxidative Stress in Animal Production.

Webinar #1: Oxidative Stress in Animal Production
On the basis of oxidative stress (Prof Peter Surai) and its impact on meat quality (Dr Mario Estevez) & share questions and answers during the roundtable.

Antioxidant-Prooxidant balance in the gut: health implication for poultry and...

Thu, 31 Oct 2019 00:00:00 GMT

Speaker: Prof Peter SURAI (Feed-Food Ltd, Glasgow, UK)

Presentation:
Optimizing the gut redox balance strengthens the intestinal frontier and helps to guarantee optimal performance under stressful conditions.

Poultry & Swine Conferences 2019

Poultry: Gut health:
Dietary fibres, short chain fatty acids or probiotics are potential means to improve the gut functioning. Indeed, modifying the gut microbiota, enhancing butyrogenic producing bacteria, reducing gut inflammation, optimizing redox balance contribute to better performance and stress resistance.

Redox balance at the gut level: from dietary antioxidants to microbiota

Tue, 23 Oct 2018 00:00:00 GMT

Speaker: Prof Peter SURAI, Feed-Food Ltd, Scotland, UK

Redox balance in the gut is critical to guarantee gut homeostasis. Lots of Reactive Oxygen Species are produced at the gut level in relationship with its high metabolism and exposure to mycotoxins, oxidized fat, microbiota. Maintaining the optimal balance between pro-oxidant and anti-oxidant compounds is thus important to guarantee gut efficacy. Selenium-based anti-oxidants have demonstrated their importance to protect gut from oxidation.

Advancia Academy 2018: Strengthening intestinal frontier: key for performance- Presentation

Prof Peter SURAI presentation introduction

Wed, 10 Oct 2018 00:00:00 GMT

Speaker: Prof Peter SURAI (Feed-Food Ltd, Scotland), introduces his presentation:

Redox balance at the gut level: from dietary antioxidants to microbiota

Advancia Academy 2018: Strengthening intestinal frontier: key for performance - Presentation

Nutritional modulation of the antioxidant capacities in poultry

Mon, 11 Jun 2018 00:00:00 GMT

Speaker: Prof Peter SURAI

By optimizing the anti-oxidant balance, selenium plays an important role in supporting performance of animals.

PSA Oxidative Stress session 2017

During the 2017 Poultry Science Association annual meeting, five speakers addressed the issue from different viewpoints as part of the Oxidative Stress Symposium.

Oxidative stress: selenium in layer and breeder nutrition

Tue, 23 Jan 2018 00:00:00 GMT

Speaker: Peter SURAI

Layers are often facing oxidative stress situations and can be helped with pure organic selenium source.

Layers are often facing stressful situations, environmental, nutritional, internal… which have oxidative components. Reducing the production of the free radicals or the consequence of those free radicals wil prevent degradation of performance. Pure organic Selenium plays a key role as chief orchestra of the antioxidant balance of layers and breeders through active selenoproteins containing SeCys.

EggDay 2017