PMID- 35445947 OWN - NLM STAT- MEDLINE DCOM- 20220425 LR - 20220425 IS - 1573-7438 (Electronic) IS - 0049-4747 (Linking) VI - 54 IP - 3 DP - 2022 Apr 20 TI - Monensin supplementation downregulated the expression signature of genes involved in cholesterol synthesis in the ruminal epithelium and adipose tissue of lambs. PG - 167 LID - 10.1007/s11250-022-03168-w [doi] AB - To understand the metabolic mechanisms regulating lipid metabolism by monensin, Afshari male lambs (n = 16) with 41.0 +/- 2.4 kg body weight (BW, mean +/- SD) at approximately 180 days of age were randomly assigned equally to two dietary treatments. After a 21-day pre-adaptation period, all animals in two groups continued to receive the basal diet, but one group received no monensin supplementation (control) while the other group received 30 mg/day of monensin per animal. Individual BW was recorded weekly to determine the average daily body weight gain (ADG). At the end of the 56-day experimental period, lambs were weighed and slaughtered. Monensin supplementation did not affect BW, ADG, and rumen fermentation characteristics. However, monensin significantly downregulated the sterol regulatory element-binding protein (SREBP)-2 gene expression in all sample tissues (p < 0.05). Also, monensin downregulated expressions of SREBP-1c and peroxisome proliferator-activated receptor (PPAR)-gamma in back fat tissues. Monensin increased the expression of 3-hydroxy-3-methylglutaryl-CoA synthase (HMGCS)-2, but it decreased the mRNA abundance of HMGCS-1 in the rumen epithelial tissues (p < 0.05). Our data suggest that monensin downregulates cholesterol synthesis via inhibition of HMGCS-1 and impairment of the SREBP pathway, probably due to a crosstalk among different tissues to control energy metabolism. CI - (c) 2022. The Author(s), under exclusive licence to Springer Nature B.V. FAU - Mirzaei-Alamouti, H AU - Mirzaei-Alamouti H AD - Department of Animal Science, University of Zanjan, 45371-38791, Zanjan, Iran. alamoutih@znu.ac.ir. FAU - Moradi, S AU - Moradi S AD - Department of Animal Science, University of Zanjan, 45371-38791, Zanjan, Iran. FAU - Patra, A K AU - Patra AK AD - Department of Animal Nutrition, Bengal University of Animal and Fishery Sciences, West, Kolkata, 700037, India. FAU - Mansouryar, M AU - Mansouryar M AD - Zist Dam Group, University Incubator Center, University of Zanjan, 45371-38791, Zanjan, Iran. mansooryar@znu.ac.ir. LA - eng PT - Journal Article PT - Randomized Controlled Trial, Veterinary DEP - 20220420 PL - United States TA - Trop Anim Health Prod JT - Tropical animal health and production JID - 1277355 RN - 0 (Sterol Regulatory Element Binding Protein 1) RN - 906O0YJ6ZP (Monensin) RN - 97C5T2UQ7J (Cholesterol) SB - IM MH - Adipose Tissue MH - Animal Feed/analysis MH - Animals MH - Body Weight MH - Cholesterol/metabolism MH - Diet/veterinary MH - Dietary Supplements MH - Epithelium/metabolism MH - Male MH - *Monensin/metabolism/pharmacology MH - *Rumen/metabolism MH - Sheep MH - Sheep, Domestic MH - Sterol Regulatory Element Binding Protein 1/metabolism OTO - NOTNLM OT - 3-Hydroxy-3-methylglutaryl-CoA synthase OT - Growth performance OT - Monensin OT - Ruminal fermentation OT - Sheep OT - Sterol regulatory element-binding protein EDAT- 2022/04/22 06:00 MHDA- 2022/04/26 06:00 CRDT- 2022/04/21 12:07 PHST- 2021/10/14 00:00 [received] PHST- 2022/04/07 00:00 [accepted] PHST- 2022/04/21 12:07 [entrez] PHST- 2022/04/22 06:00 [pubmed] PHST- 2022/04/26 06:00 [medline] AID - 10.1007/s11250-022-03168-w [pii] AID - 10.1007/s11250-022-03168-w [doi] PST - epublish SO - Trop Anim Health Prod. 2022 Apr 20;54(3):167. doi: 10.1007/s11250-022-03168-w.