title: Proteomic analysis of mouse choroid plexus cell line ECPC-4 treated with lipid A.
abstract: OBJECTIVE
  Choroid plexus (CP) epithelial cells have multiple functions in the cerebral ventricles, including cerebrospinal fluid (CSF) production and forming part of the blood-CSF barrier. They are also responsible for producing inflammatory mediators involved in meningitis. The present study aimed to elucidate the functions of the CP epithelial cells during CNS inflammation.
  
  
  METHODS
  We analyzed the proteome and phosphoproteome in lipid A-treated ECPC-4 mouse CP cells by gel electrophoresis and mass spectrometry.
  
  
  RESULTS
  Levels of 10 proteins and seven phosphoproteins were significantly altered by lipid A in time-dependent manners, including V-type proton ATPase subunit B (ATP6V), protein 40 kD, elongation factor-1δ, coatomer subunit ε (COPE), vimentin (isoform CRA a), purine nucleoside phosphorylase, eukaryotic initiation factor-4F splicing variant, put. β-actin, peroxiredoxin-6 isoform 1, and immunoglobulin heavy chain variable region. These proteins could be classified as having cytoskeleton/intermediate filament, protein-folding, signal-transduction, cell-growth, metabolism, and redox-regulation functions. The identified phosphoproteins were HSP 84, γ-actin, HSP 70 cognate, vimentin, tubulin β-4B chain, protein disulfide-isomerase A6 precursor, and heterogenous nuclear ribonucleoprotein, which could be classified as having cytoskeleton/intermediate filament, protein-folding, and metabolism functions.
  
  
  CONCLUSIONS
  These results indicate that lipid A can change the levels of proteins and phosphoproteins in ECPC-4 cells, suggesting that the identified proteins and phosphoproteins may play important roles in inflammation of the CP.
authors.affiliation: Laboratory of Molecular Cellular Biology, School of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe, 650-8586, Japan. takano@pharm.kobegakuin.ac.jp.
authors.forename: Masaoki
authors.initials: M
authors.lastname: Takano
authors.affiliation: Laboratory of Molecular Cellular Biology, School of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe, 650-8586, Japan.
authors.forename: Mieko
authors.initials: M
authors.lastname: Otani
authors.affiliation: Laboratory of Molecular Cellular Biology, School of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe, 650-8586, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Kaji
authors.affiliation: Laboratory of Molecular Cellular Biology, School of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe, 650-8586, Japan.
authors.forename: Keiji
authors.initials: K
authors.lastname: Sano
authors.affiliation: Laboratory of Physiology, School of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe, 650-8586, Japan.
authors.forename: Michiko
authors.initials: M
authors.lastname: Hamada-Kanazawa
authors.affiliation: Department of Pharmaceutical Health Care, Faculty of Pharmaceutical Sciences, Himeji Dokkyo University, 7-2-1 Kamiohno, Himeji, 670-8524, Japan.
authors.forename: Shogo
authors.initials: S
authors.lastname: Matsuyama
mesh_terms: D000818:Animals; D002460:Cell Line; D002831:Choroid Plexus / Q000166:cytology*; D020756:Coatomer Protein / Q000235:genetics / Q000378:metabolism; D004847:Epithelial Cells / Q000187:drug effects* / Q000378:metabolism; D008050:Lipid A / Q000494:pharmacology*; D051379:Mice; D010750:Phosphoproteins / Q000235:genetics / Q000378:metabolism; D040901:Proteomics; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D053719:Tandem Mass Spectrometry; D025262:Vacuolar Proton-Translocating ATPases / Q000235:genetics / Q000378:metabolism
chemical_list: D020756:Coatomer Protein; D008050:Lipid A; D010750:Phosphoproteins; D025262:Vacuolar Proton-Translocating ATPases
keywords: Choroid plexus; Epithelial cell; Lipid A; Phosphoproteome; Proteome