AI Article Synopsis
- This study assessed how flavonoids from mulberry leaves (FML) impacted various metabolic factors in finishing pigs, such as blood lipid levels and enzyme activities related to fat processing.
- Researchers used 120 pigs, dividing them into five groups fed different levels of FML over a 58-day period after a 7-day adaptation.
- Results indicated that FML supplementation improved growth rates and altered lipid profiles by lowering harmful lipid levels while also changing the size of fat cells in various tissues and enhancing beneficial fatty acid content.
Article Abstract
This study evaluated the effects of flavonoids from mulberry leaves (FML) on plasma biochemical indices, serum activities of lipid metabolism-related enzymes, fat morphology, fatty acid composition, and lipid metabolism in different adipose tissues of finishing pigs. We used 120 Chinese hybrid barrows of Berkshire and Bama mini-pigs with an average initial body weight of 45.11 ± 4.23 kg. The pigs were randomly assigned to five treatment groups and fed a control diet based on corn, soybean meal, and wheat bran or a control diet supplemented with 0.02%, 0.04%, 0.08%, or 0.16% FML. Each experimental group had six replicates (pens), with four pigs per pen. After a 7-d adaptation period, the feeding trial was conducted for 58 d. Blood and adipose tissue samples were collected from 30 pigs (one pig per pen) at the end of the test. The results showed that FML supplementation significantly decreased the feed intake to body gain ratio, the plasma concentrations of total cholesterol and free fatty acids, and the serum activity of 3-hydroxy-3-methylglutaryl coenzyme A reductase (linear or quadratic effects, < 0.05), and decreased the plasma triglyceride concentration (quadratic, = 0.07). Increasing FML supplementation increased the average daily gain and serum activities of lipoprotein lipase (linear and quadratic effects, < 0.05) and adipose triglyceride lipase (linear, < 0.05). Dietary FML supplementation decreased the adipocyte area in the dorsal subcutaneous adipose (DSA) tissue of finishing pigs (linear, = 0.05) and increased the adipocyte area in the visceral adipose tissue (quadratic, < 0.01). Increasing FML supplementation decreased the C20:1 content in DSA, abdominal subcutaneous adipose, and visceral adipose tissues of finishing pigs ( < 0.05) and increased the C18:3n3 and n-3 PUFA contents ( < 0.05). The lipid metabolism genes were regulated by the PPARγ-LXRα-ABCA1 signaling pathway, and their expressions differed in different adipose tissues. These findings suggest that FML improved growth performance, regulated lipid metabolism, inhibited fat production, and improved fatty acid distribution in the adipose tissue of finishing pigs, thereby improving pig fat's nutritional quality and health value.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10864206 | PMC |
| http://dx.doi.org/10.1016/j.aninu.2023.11.003 | DOI Listing |
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