title: [Establishment and biological characteristics of vincristine: resistant cell line from human squamous cell carcinoma].
abstract: OBJECTIVE
  To establish a VCR-resistant cell line from human squamous cell carcinoma.
  
  
  METHODS
  The cell line Tca8113 was utilized. The VCR concentration was increased gradually in consecutively passage of cultures.
  
  
  RESULTS
  A VCR-resistant cell line Tca8113/V100 from Tca8113 was established, the cells grew steadily in 100 mumol/L medium and with 19.2 times of resistance to VCR. The cell line was also resistant to ADM, PYM, CDDP, MTX, 5-Fu at different degrees. The doubling time of the cells was 37.2 hours and showed microscopically and ultrastructurally typical squamous cell carcinoma when inoculated in nude mice. Blot hybridization showed the cells had increased espression of MDR-1mRNA.
  
  
  CONCLUSIONS
  These results indicate that the cell line has multidrug resistant ability, and the reason for this may be over expression of MDR-1 gene. This cell line provides an important model for the study on drug-resistant cell both in cellular and molecular level, and on the mechanism of drug resistance.
authors.affiliation: School of Stomatology, Beijing Medical University, Beijing 100081.
authors.forename: J
authors.initials: J
authors.lastname: Zhang
authors.forename: P
authors.initials: P
authors.lastname: Du
authors.forename: J
authors.initials: J
authors.lastname: Zhang
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000235:genetics; D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology*; D002294:Carcinoma, Squamous Cell / Q000235:genetics / Q000473:pathology; D002455:Cell Division / Q000187:drug effects; D019008:Drug Resistance, Neoplasm; D006801:Humans; D020128:Inhibitory Concentration 50; D009062:Mouth Neoplasms / Q000235:genetics / Q000473:pathology; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D014407:Tumor Cells, Cultured / Q000187:drug effects; D014750:Vincristine / Q000494:pharmacology*
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000972:Antineoplastic Agents, Phytogenic; D012333:RNA, Messenger; D014750:Vincristine