title: [Establishment, characterization, and biological analysis of pancreatic adenocarcinoma cell strain SW1990/FU].
abstract: OBJECTIVE
  To establish a 5-fluorouracil (5-FU)-resistant pancreatic adenocarcinoma (PAC) cell strain, and to investigate its biological characteristics.
  
  
  METHODS
  The PAC cell strain SW1990 was selected into a multidrug-resistant cell strain stepwise with 5-FU, one of the most common drugs used in PAC chemotherapy, for 12 months and subsequently named SW1990/FU. The cell strain was characterized in terms of morphology, biology, and cross-resistance to adriamycin(ADM), mitomycin-C (MMC), and gemcitabine. BHLB/c-m nude mice tumor growth and CEA and CA19-9 levels were analyzed. In addition, karyotyping and FACS analysis were performed in SW1990/FU and SW1990.
  
  
  RESULTS
  The SW1990/FU cell strain was 132.7 times more resistant to 5-FU than the parental SW1990 cells, and exhibited cross-resistance to other agents. Compared to the parental cells, SW1990/FU cells exhibited a smaller growth rate, delayed cell-doubling time, and specific changes in chromosomes 18. Tumor diameters in multidrug resistance and parental cells inoculated in in vivo experiments were (1.5 +/- 0.30) cm and (0.8 +/- 0.15) cm, respectively.
  
  
  CONCLUSIONS
  Morphological adaptation and intracellular changes can be induced by drug challenge in PAC cells. SW1990/FU may be used as an experimental system for the search to overcome drug resistance and to elucidate possible mechanisms of acquired drug resistance in human pancreatic cancer.
authors.affiliation: Department of General Surgery, PUMC Hospital, CAMS and PUMC, Beijing 100730, China.
authors.forename: Jun-chao
authors.initials: JC
authors.lastname: Guo
authors.forename: Yu-pei
authors.initials: YP
authors.lastname: Zhao
authors.forename: Quan
authors.initials: Q
authors.lastname: Liao
authors.forename: Ge
authors.initials: G
authors.lastname: Chen
authors.forename: Li-yang
authors.initials: LY
authors.lastname: Zhang
mesh_terms: D000230:Adenocarcinoma / Q000188:drug therapy / Q000473:pathology*; D000818:Animals; D000964:Antimetabolites, Antineoplastic / Q000494:pharmacology; D002453:Cell Cycle / Q000187:drug effects; D045744:Cell Line, Tumor; D019008:Drug Resistance, Neoplasm / Q000235:genetics; D005472:Fluorouracil / Q000494:pharmacology*; D006801:Humans; D051379:Mice; D008819:Mice, Nude; D010190:Pancreatic Neoplasms / Q000188:drug therapy / Q000473:pathology*
chemical_list: D000964:Antimetabolites, Antineoplastic; D005472:Fluorouracil