title: AZT on telomerase activity and cell proliferation in HS 839.T melanoma cells.
abstract: OBJECTIVE
  To evaluate telomerase activity and proliferation of HS839.T melanoma cells, subjected to the action of AZT.
  
  
  METHODS
  Cells were grown in triplicate, AZT at different concentrations: 50, 100 and 200 μM, was added and left for 24 and 48 hours, and its effects were compared with the control group. Telomerase activity was detected by PCR and cell proliferation was evaluated by MTT.
  
  
  RESULTS
  After 24 hours, there was no inhibition of cell proliferation or telomerase activity when compared to the control group. After 48 hours, there was a momentary decrease, suggesting that the cell lines used in this study are sensitive to AZT, but quickly recover both the enzyme activity and cell proliferation.
  
  
  CONCLUSIONS
  The action of AZT on the melanoma cells studied, at the concentrations and times tested, did not inhibit telomerase activity nor affect cell proliferation.
authors.affiliation: Plastic Surgery Division, Department of Surgery, EPM, UNIFESP, Sao Paulo, Brazil.
authors.forename: Celestino Prospero de
authors.initials: CP
authors.lastname: Souza Sobrinho
authors.forename: Alfredo
authors.initials: A
authors.lastname: Gragnani
authors.forename: Ivan Dunshee Abranches Oliveira
authors.initials: ID
authors.lastname: Santos
authors.forename: Andrea Fernandes
authors.initials: AF
authors.lastname: Oliveira
authors.forename: Monica Vanucci Nunes
authors.initials: MV
authors.lastname: Lipay
authors.forename: Lydia Masako
authors.initials: LM
authors.lastname: Ferreira
mesh_terms: D000328:Adult; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D008545:Melanoma / Q000201:enzymology / Q000473:pathology*; D012878:Skin Neoplasms / Q000201:enzymology / Q000473:pathology*; D019098:Telomerase / Q000037:antagonists & inhibitors / Q000378:metabolism*; D013997:Time Factors; D015215:Zidovudine / Q000008:administration & dosage / Q000494:pharmacology*
chemical_list: D015215:Zidovudine; D019098:Telomerase