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Invited review : role of rumen biohydrogenation intermediates and rumen microbes in diet-induced milk fat depression : an update

(2020) JOURNAL OF DAIRY SCIENCE. 103(9). p.7655-7681
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Abstract
To meet the energy requirements of high-yielding dairy cows, grains and fats have increasingly been incorporated in ruminant diets. Moreover, lipid supplements have been included in ruminant diets under experimental or practical conditions to increase the concentrations of bioactive n-3 fatty acids and conjugated linoleic acids in milk and meat. Nevertheless, those feeding practices have dramatically increased the incidence of milk fat depression in dairy cattle. Although induction of milk fat depression may be a management tool, most often, diet-induced milk fat depression is unintended and associated with a direct economic loss. In this review, we give an update on the role of fatty acids, particularly originating from rumen biohydrogenation, as well as of rumen microbes in diet-induced milk fat depression. Although this syndrome seems to be multi-etiological, the best-known causal factor remains the shift in rumen biohydrogenation pathway from the formation of mainly trans-11 intermediates toward greater accumulation of trans-10 intermediates, referred to as the trans-11 to trans-10 shift. The microbial etiology of this trans-11 to trans-10 shift is not well understood yet and it seems that unraveling the microbial mechanisms of diet-induced milk fat depression is challenging. Potential strategies to avoid diet-induced milk fat depression are supplementation with rumen stabilizers, selection toward more tolerant animals, tailored management of cows at risk, selection toward more efficient fiber-digesting cows, or feeding less concentrates and grains.
Keywords
Food Science, Animal Science and Zoology, Genetics, biohydrogenating bacteria, biohydrogenation theory, mammary lipogenesis, ruminant, trans-10 shift, CONJUGATED LINOLEIC-ACID, SUBACUTE RUMINAL ACIDOSIS, DRIED DISTILLERS GRAINS, ENTERIC METHANE PRODUCTION, BACTERIAL COMMUNITY COMPOSITION, MESSENGER-RNA ABUNDANCE, DAIRY-COW DIETS, FED FISH-OIL, VACCENIC ACID, MARINE-ALGAE

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MLA
Dewanckele, Lore, et al. “Invited Review : Role of Rumen Biohydrogenation Intermediates and Rumen Microbes in Diet-Induced Milk Fat Depression : An Update.” JOURNAL OF DAIRY SCIENCE, vol. 103, no. 9, 2020, pp. 7655–81, doi:10.3168/jds.2019-17662.
APA
Dewanckele, L., Toral, P. G., Vlaeminck, B., & Fievez, V. (2020). Invited review : role of rumen biohydrogenation intermediates and rumen microbes in diet-induced milk fat depression : an update. JOURNAL OF DAIRY SCIENCE, 103(9), 7655–7681. https://doi.org/10.3168/jds.2019-17662
Chicago author-date
Dewanckele, Lore, P.G. Toral, Bruno Vlaeminck, and Veerle Fievez. 2020. “Invited Review : Role of Rumen Biohydrogenation Intermediates and Rumen Microbes in Diet-Induced Milk Fat Depression : An Update.” JOURNAL OF DAIRY SCIENCE 103 (9): 7655–81. https://doi.org/10.3168/jds.2019-17662.
Chicago author-date (all authors)
Dewanckele, Lore, P.G. Toral, Bruno Vlaeminck, and Veerle Fievez. 2020. “Invited Review : Role of Rumen Biohydrogenation Intermediates and Rumen Microbes in Diet-Induced Milk Fat Depression : An Update.” JOURNAL OF DAIRY SCIENCE 103 (9): 7655–7681. doi:10.3168/jds.2019-17662.
Vancouver
1.
Dewanckele L, Toral PG, Vlaeminck B, Fievez V. Invited review : role of rumen biohydrogenation intermediates and rumen microbes in diet-induced milk fat depression : an update. JOURNAL OF DAIRY SCIENCE. 2020;103(9):7655–81.
IEEE
[1]
L. Dewanckele, P. G. Toral, B. Vlaeminck, and V. Fievez, “Invited review : role of rumen biohydrogenation intermediates and rumen microbes in diet-induced milk fat depression : an update,” JOURNAL OF DAIRY SCIENCE, vol. 103, no. 9, pp. 7655–7681, 2020.
@article{8695902,
  abstract     = {{To meet the energy requirements of high-yielding dairy cows, grains and fats have increasingly been incorporated in ruminant diets. Moreover, lipid supplements have been included in ruminant diets under experimental or practical conditions to increase the concentrations of bioactive n-3 fatty acids and conjugated linoleic acids in milk and meat. Nevertheless, those feeding practices have dramatically increased the incidence of milk fat depression in dairy cattle. Although induction of milk fat depression may be a management tool, most often, diet-induced milk fat depression is unintended and associated with a direct economic loss. In this review, we give an update on the role of fatty acids, particularly originating from rumen biohydrogenation, as well as of rumen microbes in diet-induced milk fat depression. Although this syndrome seems to be multi-etiological, the best-known causal factor remains the shift in rumen biohydrogenation pathway from the formation of mainly trans-11 intermediates toward greater accumulation of trans-10 intermediates, referred to as the trans-11 to trans-10 shift. The microbial etiology of this trans-11 to trans-10 shift is not well understood yet and it seems that unraveling the microbial mechanisms of diet-induced milk fat depression is challenging. Potential strategies to avoid diet-induced milk fat depression are supplementation with rumen stabilizers, selection toward more tolerant animals, tailored management of cows at risk, selection toward more efficient fiber-digesting cows, or feeding less concentrates and grains.}},
  author       = {{Dewanckele, Lore and Toral, P.G. and Vlaeminck, Bruno and Fievez, Veerle}},
  issn         = {{0022-0302}},
  journal      = {{JOURNAL OF DAIRY SCIENCE}},
  keywords     = {{Food Science,Animal Science and Zoology,Genetics,biohydrogenating bacteria,biohydrogenation theory,mammary lipogenesis,ruminant,trans-10 shift,CONJUGATED LINOLEIC-ACID,SUBACUTE RUMINAL ACIDOSIS,DRIED DISTILLERS GRAINS,ENTERIC METHANE PRODUCTION,BACTERIAL COMMUNITY COMPOSITION,MESSENGER-RNA ABUNDANCE,DAIRY-COW DIETS,FED FISH-OIL,VACCENIC ACID,MARINE-ALGAE}},
  language     = {{eng}},
  number       = {{9}},
  pages        = {{7655--7681}},
  title        = {{Invited review : role of rumen biohydrogenation intermediates and rumen microbes in diet-induced milk fat depression : an update}},
  url          = {{http://dx.doi.org/10.3168/jds.2019-17662}},
  volume       = {{103}},
  year         = {{2020}},
}

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