title: [Expression and significance of GCS gene in human pancreatic cancer cell SW1990 and its drug-resistant sublines].
abstract: OBJECTIVE
  To study the expression and significance of GCS gene in human pancreatic cancer cell line SW1990 and its drug-resistant sublines.
  
  
  METHODS
  SW1990 and its drug-resistant sublines, SW1990/FU, SW1990/ADM and SW1990/GEM were cultured in vitro. CCK-8 (Cell Counting kit-8) was used to detect the drug resistance of the sublines. Relative quantitation of GCS mRNA expression was evaluated by real-time PCR and Western blot was adopted to evaluate the expression of GCS protein.
  
  
  RESULTS
  The drug resistance indexes of SW1990/FU, SW1990/ADM and SW1990/GEM were 339.7, 11.9 and 56.6, respectively. The GCS mRNA and protein were expressed in all SW1990 and its drug-resistant sublines. There was a higher expression of GCS mRNA in all the sublines and a significant difference of GCS protein expression was detected in SW1990/ADM and SW1990/GEM compared with SW1990.
  
  
  CONCLUSIONS
  GCS gene is expressed in SW1990 and its drug-resistance sublines. The high expression of GCS protein in SW1990/ADM and SW1990/GEM might be one reason of resistance to ADM and GEM in the sublines.
authors.affiliation: Department of General Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing 100730, China.
authors.forename: Guang-bo
authors.initials: GB
authors.lastname: Bu
authors.forename: Yu-pei
authors.initials: YP
authors.lastname: Zhao
authors.forename: Ge
authors.initials: G
authors.lastname: Chen
authors.forename: Tai-ping
authors.initials: TP
authors.lastname: Zhang
authors.forename: Li-jun
authors.initials: LJ
authors.lastname: Li
authors.forename: Yuan-de
authors.initials: YD
authors.lastname: Wu
mesh_terms: D045744:Cell Line, Tumor; D019008:Drug Resistance, Neoplasm / Q000235:genetics*; D015870:Gene Expression; D005964:Glucosyltransferases / Q000096:biosynthesis / Q000235:genetics*; D006801:Humans; D015151:Immunoblotting; D010190:Pancreatic Neoplasms / Q000201:enzymology / Q000235:genetics* / Q000473:pathology; D012333:RNA, Messenger / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D012333:RNA, Messenger; D005964:Glucosyltransferases; C023246:ceramide glucosyltransferase