Cited by 249Ruminant Nutrition and Digestive PhysiologyMilk Quality and Mastitis in Dairy CowsLipid metabolism and biosynthesis

Expression and nutritional regulation of lipogenic genes in the ruminant lactating mammary gland

Bernard, L., Leroux, C., Chilliard, Y.·2007·Advances in Experimental Medicine and Biology

Abstract

The effect of nutrition on milk fat yield and composition has largely been investigated in cows and goats, with some differences for fatty acid (FA) composition responses and marked species differences in milk fat yield response. Recently, the characterization of lipogenic genes in ruminant species allowed in vivo studies focused on the effect of nutrition on mammary expression of these genes, in cows (mainly fed milk fat-depressing diets) and goats (fed lipid-supplemented diets). These few studies demonstrated some similarities in the regulation of gene expression between the two species, although the responses were not always in agreement with milk FA secretion responses. A central role for trans-10 C18:1 and trans-10, cis-12 CLA as regulators of milk fat synthesis has been proposed. However, trans-10 C18:1 does not directly control milk fat synthesis in cows, despite the fact that it largely responds to dietary factors, with its concentration being negatively correlated with milk fat yield response in cows and, to a lesser extent, in goats. Milk trans-10, cis-12 CLA is often correlated with milk fat depression in cows but not in goats and, when postruminally infused, acts as an inhibitor of the expression of key lipogenic genes in cows. Recent evidence has also proven the inhibitory effect of the trans-9, cis-11 CLA isomer. The molecular mechanisms by which nutrients regulate lipogenic gene expression have yet to be well identified, but a central role for SREBP-1 has been outlined as mediator of FA effects, whereas the roles of PPARs and STAT5 need to be determined. It is expected that the development of in vitro functional systems for lipid synthesis and secretion will allow future progress toward (1) the identification of the inhibitors and activators of fat synthesis, (2) the knowledge of cellular mechanisms, and (3) the understanding of differences between ruminant species.

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Crossref · 10.1007/978-0-387-74087-4_2

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Authors
Bernard, L., Leroux, C., & Chilliard, Y.
Affiliations
Unité Mixte de Recherche sur les Herbivores (FR)
Corresponding author
Bernard, L.
Venue
Advances in Experimental Medicine and Biology
Published
2007-12-25
Volume
606
Pages
67-108
OpenAlex
W2124307313
Cited by
249
References
190
Citations by year
2026: 6 · 2025: 7 · 2024: 9 · 2023: 12 · 2022: 7 · 2021: 16 · 2020: 14 · 2019: 11 · 2018: 12 · 2017: 21 · 2016: 18 · 2015: 17 · 2014: 21 · 2013: 15 · 2012: 15
FWCI
34.30
Type
book chapter
Language
en
Open access
closed
Locations
  • Springer eBooks (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Ruminant Nutrition and Digestive Physiology
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Milk Quality and Mastitis in Dairy Cows
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
Keywords
lipogenic gene expression, mammary gland, milk fat synthesis, ruminant nutrition, trans-10, cis-12 CLA, SREBP1, peroxisome proliferator-activated receptors, STAT5, milk fat depression, cattle, goats, fatty acid composition, species differences
MeSH terms
Animals, Animal Nutritional Physiological Phenomena, Gene Expression Regulation, Lactation, Mammary Glands, Animal, Ruminants, Lipogenesis

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