title: The impact of Salmonella Enteritidis on lipid accumulation in chicken hepatocytes.
abstract: Salmonella enterica serovar Enteritidis (SE) is a public health concern and infected chickens serve as a reservoir that potentially transmits to humans through food. Although SE seldom causes systemic disease in chickens, virulent SE strains can colonize in intestines and lead a persistent infection of the liver. The liver is the primary organ for lipid metabolism in chickens and the site for production and assembly of main components in yolk. We performed a time-course experiment using LMH-2A cells that were infected with SE and co-incubated with β-oestradiol to evaluate if SE infection affected lipid metabolism and subsequently changed lipoprotein formation for egg yolk. The results indicated that lipid accumulation significantly increased in infected LMH-2A cells while the viability of these cells was only slightly decreased. The mRNA expressions of lipid transportation and most lipogenetic genes including sterol regulatory element binding protein 1, acetyl-CoA carboxylase, fatty-acid synthase, long-chain-fatty-acid-CoA ligase 1, peroxisome proliferator-activated receptor-γ, and very-low-density lipoproteins (VLDLs) II were significantly up-regulated while the expression of lipogenetic-related stearoyl-CoA denaturase 1 was down-regulated. Moreover, decline in lipid transportation of hepatocytes was evidenced by the down-regulation of oestrogen receptor α which promotes VLDLy formation, an increase of intra-cellular accumulation of Apoprotein B (ApoB) protein, and a decrease of cellular excretion of VLDL protein. Conclusively, SE infection could elevate lipid synthesis and reduce lipid transportation in the chicken hepatocytes. These changes may lead excessive lipid accumulation in liver and slower lipoprotein deposition in yolk.
authors.affiliation: a Zoonoses Research Center and School of Veterinary Medicine , National Taiwan University , Taipei City , Taiwan (ROC).
authors.forename: Chia-Lan
authors.initials: CL
authors.lastname: Wang
authors.affiliation: a Zoonoses Research Center and School of Veterinary Medicine , National Taiwan University , Taipei City , Taiwan (ROC).
authors.forename: Yang-Chi
authors.initials: YC
authors.lastname: Fan
authors.affiliation: b Department of Basic Sciences, College of Veterinary Medicine , Mississippi State University , Starkville , MS , USA.
authors.forename: Chinling
authors.initials: C
authors.lastname: Wang
authors.affiliation: a Zoonoses Research Center and School of Veterinary Medicine , National Taiwan University , Taipei City , Taiwan (ROC).|c Animal Health Research Institute, Council of Agriculture , New Taipei City , Taiwan (ROC).
authors.forename: Hsiang-Jung
authors.initials: HJ
authors.lastname: Tsai
authors.affiliation: a Zoonoses Research Center and School of Veterinary Medicine , National Taiwan University , Taipei City , Taiwan (ROC).
authors.forename: Chung-Hsi
authors.initials: CH
authors.lastname: Chou
mesh_terms: D000818:Animals; D001692:Biological Transport; D002478:Cells, Cultured; D002645:Chickens / Q000378:metabolism / Q000382:microbiology*; D003066:Coenzyme A Ligases / Q000235:genetics; D004197:Disease Reservoirs; D015536:Down-Regulation; D015964:Gene Expression Regulation, Bacterial; D022781:Hepatocytes / Q000378:metabolism / Q000382:microbiology; D050356:Lipid Metabolism; D008079:Lipoproteins, VLDL / Q000235:genetics; D008099:Liver / Q000378:metabolism / Q000382:microbiology; D010063:Ovum / Q000378:metabolism / Q000382:microbiology; D047492:Peroxisome Proliferator-Activated Receptors / Q000235:genetics; D012481:Salmonella Infections, Animal / Q000382:microbiology*; D012477:Salmonella enteritidis / Q000502:physiology*; D013230:Stearoyl-CoA Desaturase / Q000235:genetics; D051780:Sterol Regulatory Element Binding Protein 1 / Q000235:genetics; D015854:Up-Regulation; D000098859:Long-Chain-Fatty-Acid-CoA Ligase
chemical_list: D008079:Lipoproteins, VLDL; D047492:Peroxisome Proliferator-Activated Receptors; D051780:Sterol Regulatory Element Binding Protein 1; D013230:Stearoyl-CoA Desaturase; D003066:Coenzyme A Ligases; D000098859:Long-Chain-Fatty-Acid-CoA Ligase
keywords: LMH-2A cells; Salmonella Enteritidis; VLDL; egg production; liver lipid accumulation