title: Modulation of GDP-fucose level for generating proteins with reduced rate of fucosylation (WO2010141855).
abstract: BACKGROUND
  The application (WO2010141855) is in the field of glycobiology, and involves the control of the rate of fucosylation of proteins by exogenous factors.
  
  
  OBJECTIVE
  It aims at controlling the rate of protein fucosylation with inhibitors (drugs or nucleic acid antagonists) of enzymes involved in the synthesis of GDP-fucose.
  
  
  METHODS
  Mammalian cell lines were cultured in the presence of inhibitors, for example, siRNA. The rates of GDP-fucose in cells and during protein fucosylation were characterized.
  
  
  RESULTS
  The level of protein fucosylation decreases rapidly in response to a decrease in GDP-fucose level.
  
  
  CONCLUSIONS
  The relationship between the rate of fucosylation of proteins and the level of GDP-fucose in a cell is non-linear. Reduction in the rate of protein fucosylation can be achieved with a minimal reduction of the level of GDP-fucose in cells. The paradigm may be used to synthesize proteins and antibodies, with a reduced rate of fucosylation. The application claims that the use of drugs or nucleic acid antagonists that inhibit the enzymes involved in GDP-fucose biosynthesis optimizes the level of GDP-fucose present in cells, and reduces the rate of fucosylation of glycoproteins.
authors.affiliation: Dublin City University , School of Biotechnology, Glasnevin, Dublin 9 , Ireland. philippe.taupin@dcu.ie
authors.forename: Philippe
authors.initials: P
authors.lastname: Taupin
mesh_terms: D000818:Animals; D016466:CHO Cells; D002460:Cell Line; D006224:Cricetinae; D003412:Cricetulus; D004791:Enzyme Inhibitors / Q000494:pharmacology; D005643:Fucose / Q000378:metabolism*; D005647:Fucosyltransferases / Q000037:antagonists & inhibitors; D006023:Glycoproteins / Q000096:biosynthesis*; D006154:Guanosine Diphosphate Fucose / Q000096:biosynthesis*; D007700:Kinetics; D010330:Patents as Topic; D011506:Proteins / Q000378:metabolism*; D034741:RNA, Small Interfering / Q000494:pharmacology
chemical_list: D004791:Enzyme Inhibitors; D006023:Glycoproteins; D011506:Proteins; D034741:RNA, Small Interfering; D006154:Guanosine Diphosphate Fucose; D005643:Fucose; D005647:Fucosyltransferases