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Micotoxinas y estrés oxidativo: un cuello de botella del rendimiento 4/5

Mon, 08 Nov 2021 09:52:08 GMT

Doctor: Dr. Peter Surai, Vitagene and Health Research Centre, Reino Unido

Es bien sabido que las micotoxinas afectan a los animales de diferentes formas, y el rendimiento animal no es la única preocupación. Como resultado, la cantidad de productos, tiempo y dinero que el productor debe destinar al control de micotoxinas se convierte en un verdadero enigma.

La serie Mycoinfo, de seminarios web de Adisseo tiene como objetivo reunir a expertos para abordar de manera integral la situación en lo que respecta al manejo de micotoxinas.

Durante esta cuarta sesión, el Dr. Peter Surai, del Vitagene and Health Research Center, Reino Unido, abordará las micotoxinas y el estrés oxidativo: un cuello de botella en el rendimiento.

Sulfur Amino Acids: a molecular switch for oxidative stress signaling

Thu, 17 Jun 2021 00:00:00 GMT

Speaker: Dr Alain LESCURE, UPR ARN CNRS, Université de Strasbourg, Institut de Biologie Moléculaire & Cellulaire, Strasbourg, France

Beyond their role in protein synthesis, sulfur amino acids have important signaling roles in the redox balance and the antioxidant mechanisms.

Advancia 2016:
Sulfur amino acids: more than essential amino acids! 10 years of new research to demonstrate their roles in cell signaling, modulating lipid and energy metabolisms and promoting antioxidant mechanisms. Watch scientists testimonials on Amino Acids research.

Mycotoxin and oxidative stress: a performance bottleneck - MycoInfo 4/5

Wed, 26 May 2021 00:00:00 GMT

Speaker: Dr Peter Surai, Vitagene and Health Research Centre, UK

It is well-known that mycotoxins impact animals in different ways, and the performance of animals is not the only concern. As a consequence, the amount of inventiveness, time and money the producer should allocate to mycotoxin control becomes a real puzzle.

Adisseo MycoInfo's Webinar series aim to gather experts around a table to together draw up a picture of a holistic mycotoxin management. During this fourth session, Dr. Peter Surai, Vitagene and Health Research Centre, UK, will address Mycotoxin and Oxidative Stress: a performance bottleneck.

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.

Efficiency and Oxidative Metabolism: the difficult balance

Mon, 11 Jun 2018 00:00:00 GMT

Speaker: Prof Walter BOTTJE

Improving the oxidative metabolism of the mitochondria is key for feed efficiency.

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

Oxidative Stress

Mon, 18 Dec 2017 00:00:00 GMT

Speaker: Dr. Mickael Briens

Dr. Mickael Briens explains what is Oxidative Stress, its impact in production and some solutions to control it.

Nutriciencia Brasil 2017

Professores e pesquisadores discutem sobre os desafios constantemente enfrentados pelos produtores de frango.