Maîtrise par l’alimentation des teneurs en acides gras et en composés vitaminiques du lait de vache

Ferlay, Anne; Graulet, Benoı̂t; Chilliard, Yves

doi:10.20870/productions-animales.2013.26.2.3146

Cited by 14 publications

(8 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Cow’s milk contains approximately 0.5 µg/L of vitamin B12, while colostrum is four to 10 times more than milk [ 3 ]. It has been shown that the composition and management of the diet in dairy herds can affect the concentration of vitamin B12 in milk, mainly because the ruminal synthesis of vitamin B12 is affected by the diet [ 40 , 64 , 65 ] and because the vitamin is partially secreted by milk [ 66 ]. Furthermore, the variability in the concentration of vitamin B12 between cows could be partly explained by genetic factors [ 40 , 41 ].…”

Section: Cobalt Metabolism: Absorption Storage and Excretionmentioning

confidence: 99%

Relationship between Vitamin B12 and Cobalt Metabolism in Domestic Ruminant: An Update

González-Montaña

Escalera-Valente

Alonso

et al. 2020

Animals

View full text Add to dashboard Cite

Cobalt, as a trace element, is essential for rumen microorganisms for the formation of vitamin B12. In the metabolism of mammals, vitamin B12 is an essential part of two enzymatic systems involved in multiple metabolic reactions, such as in the metabolism of carbohydrates, lipids, some amino acids and DNA. Adenosylcobalamin and methylcobalamin are coenzymes of methylmalonyl coenzyme A (CoA) mutase and methionine synthetase and are essential for obtaining energy through ruminal metabolism. Signs of cobalt deficiency range from hyporexia, reduced growth and weight loss to liver steatosis, anemia, impaired immune function, impaired reproductive function and even death. Cobalt status in ruminant animals can be assessed by direct measurement of blood or tissue concentrations of cobalt or vitamin B12, as well as the level of methylmalonic acid, homocysteine or transcobalamin in blood; methylmalonic acid in urine; some variables hematological; food consumption or growth of animals. In general, it is assumed that the requirement for cobalt (Co) is expressed around 0.11 ppm (mg/kg) in the dry matter (DM) diet; current recommendations seem to advise increasing Co supplementation and placing it around 0.20 mg Co/kg DM. Although there is no unanimous criterion about milk production, fattening or reproductive rates in response to increased supplementation with Co, in some investigations, when the total Co of the diet was approximately 1 to 1.3 ppm (mg/kg), maximum responses were observed in the milk production.

show abstract

Section: Cobalt Metabolism: Absorption Storage and Excretionmentioning

confidence: 99%

Relationship between Vitamin B12 and Cobalt Metabolism in Domestic Ruminant: An Update

González-Montaña

Escalera-Valente

Alonso

et al. 2020

Animals

View full text Add to dashboard Cite

show abstract

“…Furthermore, another study using multiparous cows, presented that vitamin B 12 concentration significantly decreased in serum from 5.7 ng/ml at 55 days prepartum to 2.3, 2.0 and 1.9 ng/ml at 20, 7 and 120 days after parturition respectively (Kincaid and Socha 2007 ). Synthesis of B 12 and folic acid in the rumen of dairy cattle has been measured to be 73.0–79.8 and 16.5–21.0 mg/day respectively (Santschi et al 2005 ; Schwab et al 2006 ), and these rates of synthesis significantly affect the amount of vitamins secreted into milk (Ferlay et al 2013 ). Some studies reported that vitamin B 12 deficiency is sometimes mitigated by high folate concentration (Selhub et al 2009 ), and that vitamin B 12 secretion into the milk can be managed in dairy animals through dietary supplementation of vitamin B 12 .…”

Section: Folates and Vitamin B 12 Interactionmentioning

confidence: 99%

Folate promotes S-adenosyl methionine reactions and the microbial methylation cycle and boosts ruminants production and reproduction

Abbasi

Wang

et al. 2018

AMB Expr

View full text Add to dashboard Cite

Folate has gained significant attention due to its vital role in biological methylation and epigenetic machinery. Folate, or vitamin (B9), is only produced through a de novo mechanism by plants and micro-organisms in the rumen of mature animals. Although limited research has been conducted on folate in ruminants, it has been noted that ruminal synthesis could not maintain folate levels in high yielding dairy animals. Folate has an essential role in one-carbon metabolism and is a strong antiproliferative agent. Folate increases DNA stability, being crucial for DNA synthesis and repair, the methylation cycle, and preventing oxidation of DNA by free radicals. Folate is also critical for cell division, metabolism of proteins, synthesis of purine and pyrimidine, and increasing the de novo delivery of methyl groups and S-adenosylmethionine. However, in ruminants, metabolism of B12 and B9 vitamins are closely connected and utilization of folate by cells is significantly affected by B12 vitamin concentration. Supplementation of folate through diet, particularly in early lactation, enhanced metabolic efficiency, lactational performance, and nutritional quality of milk. Impaired absorption, oxidative degradation, or deficient supply of folate in ruminants affects DNA stability, cell division, homocysteine remethylation to methionine, de novo synthesis of S-adenosylmethionine, and increases DNA hypomethylation, uracil misincorporation into DNA, chromosomal damage, abnormal cell growth, oxidative species, premature birth, low calf weight, placental tube defects, and decreases production and reproduction of ruminant animals. However, more studies are needed to overcome these problems and reduce enormous dietary supplement waste and impaired absorption of folate in ruminants. This review was aimed to highlight the vital role of folic acid in ruminants performance.

show abstract

“…Par ailleurs, comparativement au pâturage de prairies temporaires, le pâturage de prairies permanentes diversifiées est à l'origine d'une augmentation dans le lait et le fromage de la teneur en acide α-linolénique et d'une réduction de la teneur en acides gras saturés les plus délétères vis-à-vis des maladies cardiovasculaires, notamment l'acide palmitique (Ferlay et al 2013). Les fromages issus des prairies les plus diversifiées présentent également une palette d'arômes plus étendue et une flaveur globale moins intense que les fromages issus de prairies moins diversifiées.…”

Section: / Les Processus Biologiques Sous-jacents Aux Services Rendusunclassified

La diversité des services rendus par les territoires d’élevage herbagers fournissant des produits de qualité dans des environnements préservés

et al. 2018

View full text Add to dashboard Cite

Les zones herbagères de moyenne et de haute montagne fournissent un bouquet de services équilibré qui comprend des services d’approvisionnement (produits de qualité et disposant d’une bonne image auprès des consommateurs), des services environnementaux et de vitalité territoriale. Afin d’expliciter les déterminants de cette diversité, quatre études de cas ont été retenues à des échelles géographiques différentes : AOP Cantal et Laguiole dans le Massif central, région de Franche-Comté, alpages suisses. Une même grille d’analyse a été appliquée à chacune de ces études de cas. Le contexte qui conduit à la situation actuelle est présenté dans une perspective historique, avant que soient analysés leurs principaux services d’approvisionnement, environnementaux et de vitalité territoriale. Chaque étude de cas est synthétisée par une formalisation inspirée d’une analyse en termes de système socio-écologique. Nous discutons par la suite des leviers permettant de mieux concilier les performances productives, environnementales et sociales de l’élevage dans ces territoires. Un levier biotechnique majeur est la recherche d’autonomie fourragère qui permet de réduire les coûts de production tout en bénéficiant à la qualité nutritionnelle des laits et des fromages. Il existe par ailleurs des liens forts entre la nature de la gouvernance des filières et le bouquet de services fournis. Une gouvernance territoriale de filières crée de la valeur en valorisant les ressources locales, et en régulant le système de production par des organisations dédiées ; elle bénéficie conjointement aux services de vitalité territoriale et de qualité de l’environnement. A l’inverse, une gouvernance sectorielle apparait moins favorable. Le développement de formes hybrides de gouvernance (par exemple alimentaire territoriale) constitue l’un des leviers importants.

show abstract

Maîtrise par l’alimentation des teneurs en acides gras et en composés vitaminiques du lait de vache

Cited by 14 publications

References 61 publications

Relationship between Vitamin B12 and Cobalt Metabolism in Domestic Ruminant: An Update

Relationship between Vitamin B12 and Cobalt Metabolism in Domestic Ruminant: An Update

Folate promotes S-adenosyl methionine reactions and the microbial methylation cycle and boosts ruminants production and reproduction

La diversité des services rendus par les territoires d’élevage herbagers fournissant des produits de qualité dans des environnements préservés

Contact Info

Product

Resources

About