English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Adipose tissue is essential for whole-body energy homeostasis and can be affected by dietary nutrient levels and many organic compounds such as vitamins or amino acids. The fat of animal origin is not appreciated by consumers because it is considered to be unhealthy (Liu et al., 2014). However, the quantity and distribution of fat in the body, as well as fatty acid composition in the adipose tissue, are important contributors to various aspects of meat quality (Siebert et al., 2006). Because of the consumer’s increasing awareness of nutrition for healthcare on one hand and the need of reaching a certain level of fat in the meat to guarantee its organoleptic quality on the other, a better knowledge of adipogenesis in meat of farm animals would be desirable. Therefore, understanding adipose tissue physiology and regulating its development safely and effectively have become the important aspects of meat production. Carotenoids, that play an important role as provitamin A and antioxidants, are C40 lipophilic ABSTRACT. Adipose tissue in meat, especially subcutaneous fat, is not appreciated by consumers as it is considered unhealthy. The effects of β-carotene (βC) on the expression of ten genes related to carotenoid, vitamin A (VA) or lipid metabolism were evaluated in subcutaneous and omental (visceral) adipose tissue of Simmental crossbred steers receiving various βC treatments (0, 600, 1200 and 1800 mg/d). Two carotenoid oxidative cleavage genes (β-carotene15,15′-monooxygenase (BCMO1) and β-carotene-9′,10’-dioxygenase (BCO2)) were up-regulated and three VA metabolic genes (retinoid X receptor α (RXRA), retinal reductase (RALDH) and lecithin-retinol acyltransferase (LRAT)) were down-regulated in subcutaneous and omental adipose tissues. Gene encoding peroxisome proliferator-activated receptor γ (PPARG) involved in adipocyte differentiation and lipogenesis was down-regulated in both examined fat tissues. For the omental adipose tissue, the lipogenesis gene (fatty acid synthase (FAS)) and the two lipolysis genes (hormone-sensitive lipase (HSL) and adipose triglyceride lipase (ATGL)) were down-regulated, but another lipogenesis gene (acetyl-CoA carboxylase (ACC)) was up-regulated. First of all, the addition of βC in the diet may inhibit the expression of the major adipogenesis gene – PPARG, and increase the expression of genes involved in βC catabolism in adipose tissue of beef cattle. An effective βC dose to regulate the expression of genes connected with carotenoid, VA and lipid metabolism would be at least 600 mg/d. Received: 17 January 2019 Revised: 31 October 2019 Accepted: 18 February 2020

journal of animal and feed sciences

β-carotene as a dietary factor affecting expression of genes connected with carotenoid, vitamin A and lipid metabolism in the subcutaneous and omental adipose tissue of beef cattle