title: Nicotinic acid supplementation in diet favored intramuscular fat deposition and lipid metabolism in finishing steers.
abstract: Nicotinic acid (NA) acting as the precursor of NAD(+)/NADH and NADP(+)/NADPH, participates in many biochemical processes, e.g. lipid metabolism. The main purpose of this study was to investigate the effects of dietary NA on carcass traits, meat quality, blood metabolites, and fat deposition in Chinese crossbred finishing steers. Sixteen steers with the similar body weight and at the age of 24 months were randomly allocated into control group (feeding basal diet) and NA group (feeding basal diet + 1000 mg/kg NA). All experimental cattle were fed a 90% concentrate diet and 10% forage straw in a 120-day feeding experiment. The results showed that supplemental NA in diet increased longissimus area, intramuscular fat content (17.14% vs. 9.03%), marbling score (8.08 vs. 4.30), redness (a*), and chroma (C*) values of LD muscle, but reduced carcass fat content (not including imtramuscular fat), pH24 h and moisture content of LD muscle, along with no effect on backfat thickness. Besides, NA supplementation increased serum HDL-C concentration, but decreased the serum levels of LDL-C, triglyceride, non-esterified fatty acid, total cholesterol, and glycated serum protein. In addition, NA supplementation increased G6PDH and ICDH activities of LD muscle. These results suggested that NA supplementation in diet improves the carcass characteristics and beef quality, and regulates the compositions of serum metabolites. Based on the above results, NA should be used as the feed additive in cattle industry.
authors.affiliation: Jiangxi Provincial Key Laboratory for Animal Nutrition/Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang 330045, China.
authors.forename: Zhu-Qing
authors.initials: ZQ
authors.lastname: Yang
authors.affiliation: Jiangxi Provincial Key Laboratory for Animal Nutrition/Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang 330045, China.
authors.forename: Lin-Bin
authors.initials: LB
authors.lastname: Bao
authors.affiliation: Jiangxi Provincial Key Laboratory for Animal Nutrition/Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang 330045, China.
authors.forename: Xiang-Hui
authors.initials: XH
authors.lastname: Zhao
authors.affiliation: Jiangxi Provincial Key Laboratory for Animal Nutrition/Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang 330045, China.
authors.forename: Can-Yu
authors.initials: CY
authors.lastname: Wang
authors.affiliation: Jiangxi Provincial Key Laboratory for Animal Nutrition/Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang 330045, China.
authors.forename: Shan
authors.initials: S
authors.lastname: Zhou
authors.affiliation: Jiangxi Provincial Key Laboratory for Animal Nutrition/Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang 330045, China.
authors.forename: Lu-Hua
authors.initials: LH
authors.lastname: Wen
authors.affiliation: Jiangxi Provincial Key Laboratory for Animal Nutrition/Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang 330045, China.
authors.forename: Chuan-Bian
authors.initials: CB
authors.lastname: Fu
authors.affiliation: Jiangxi Provincial Key Laboratory for Animal Nutrition/Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang 330045, China.
authors.forename: Jian-Ming
authors.initials: JM
authors.lastname: Gong
authors.affiliation: Jiangxi Provincial Key Laboratory for Animal Nutrition/Engineering Research Center of Feed Development, Jiangxi Agricultural University, Nanchang 330045, China qumingren@126.com.
authors.forename: Ming-Ren
authors.initials: MR
authors.lastname: Qu
mesh_terms: D000818:Animals; D002417:Cattle; D004032:Diet / Q000379:methods*; D019587:Dietary Supplements; D005223:Fats / Q000378:metabolism*; D000960:Hypolipidemic Agents / Q000008:administration & dosage*; D050356:Lipid Metabolism; D008460:Meat / Q000032:analysis*; D009525:Niacin / Q000008:administration & dosage*; D000069466:Red Meat
chemical_list: D005223:Fats; D000960:Hypolipidemic Agents; D009525:Niacin
keywords: Chinese crossbred steers; Nicotinic acid; blood metabolites; intramuscular fat; meat quality