Effects of Sweet Potato Residue Replace Distillers' Grains on Intramuscular Fat Deposition Related Genes Expression in Fattening Cattle

ZHANG Haibo

doi:10.3969/j.issn.1006-267x.2018.11.045

2018 , Vol. 30 >Issue 11: 4676 - 4682

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.11.045

Molecular Nutrition

Effects of Sweet Potato Residue Replace Distillers' Grains on Intramuscular Fat Deposition Related Genes Expression in Fattening Cattle

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College of Life Science and Environmetal Resource, Yichun University, Yichun 336000, China

Received date: 2018-05-03

Online published: 2018-11-20

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Abstract

This experiment was conducted to study the effects of sweet potato residue replace distillers' grains on the intramuscular fat (IMF) deposition related genes expression in fattening cattle. Thirty crossbred fattening steers (Yellow breed×Simmental cattle) were randomly divided into 3 groups with 10 cattle in each group and 1 cattle in each repetition. Group A (control group) was fed a basal diet, and sweet potato residue was used in groups B and C to replace 50% and 100% distiller's grains on the basal diet. The test lasted for 9 weeks. The results showed as follows:1) the average daily gain and IMF content in group C were significantly lower than those in groups A and B (P<0.05). 2) The serum contents of triglyceride, total cholesterol, high density lipoprotein and low density lipoprotein in group C were significantly lower than those in group A (P<0.05). 3) The activities of fatty acid synthetase (FAS) and acetyl coenzyme A carboxylase activity (ACC) in longissimus dorsi muscle in group C were significantly lower than those in groups A and B (P<0.05), and the activities of hormone sensitive lipase (HSL) and carnitine transferase 1 (CPT-1) were significantly higher than those in groups A and B (P<0.05). The activities of FAS and ACC in longissimus dorsi muscle in group B were significantly lower than those in group A (P<0.05), and the activities of HSL and CPT-1 were significantly higher than those in group A (P<0.05). 4) The gene expression levels of sterol regulator element binding protein-1 (SREBP-1), FAS, ACC, peroxidase activation receptor γ (PPARγ) in longissimus dorsi muscle in group C were significantly lower than those in groups A and B (P<0.05), and the gene expression levels of HSL and CPT-1 were significantly higher than those in groups A and B (P<0.05). The gene expression levels of SREBP-1, FAS, ACC, PPARγ in longissimus dorsi muscle in group B were significantly lower than those in group A (P<0.05), and the gene expression levels of HSL and CPT-1 were significantly higher than those in group A (P<0.05). The results indicate that increasing the replacement ratio of sweet potato residue to distillers' grains can down-regulate the longissimus dorsi muscle fatty acid synthesis related genes (SREBP-1, FAS, ACC and PPARγ) expression, and up-regulate the fatty acid decomposition related genes (HSL and CPT-1) expression, reducing the longissimus dorsi muscle IMF deposition.

Key words： fattening cattle; sweet potato residue; intramuscular fat; gene expression; distiller's grains

Cite this article

ZHANG Haibo . Effects of Sweet Potato Residue Replace Distillers' Grains on Intramuscular Fat Deposition Related Genes Expression in Fattening Cattle[J]. Chinese Journal of Animal Nutrition, 2018 , 30(11) : 4676 -4682 . DOI: 10.3969/j.issn.1006-267x.2018.11.045

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