title: Dichlorotriazinyl aminofluorescein inhibits human keratocyte proliferation in vitro.
abstract: OBJECTIVE
  Dichlorotriazinyl aminofluorescein (DTAF) has been used to stain corneal stromal collagen as part of in vivo experimentation. Toxicity of this drug, if present, might alter the observed wound healing. To determine if this drug has any deleterious effect on keratocytes, we evaluated it in vitro.
  
  
  METHODS
  Human keratocytes in 96 well plates were exposed to different concentrations of DTAF (10e-7, 10e-6, 10e-5, 10e-4, 10e-3, 10e-2, and 10e-1 mg/ml of media). Exposure times of 1 and 24 hours at each concentration of DTAF were evaluated. The cell number was measured 1 and 3 days after exposure to the drug using a coulter-counter and a hemocytometer.
  
  
  RESULTS
  The proliferation of keratocytes after 24 hours of exposure to the drug was inhibited in a dose dependent manner by DTAF, but 1 hour exposure of keratocytes to the drug did not inhibit keratocyte proliferation.
  
  
  CONCLUSIONS
  These results suggest that DTAF has inhibitory effects on human keratocyte proliferation after 24 hours of exposure, while exposure limited to 1 hour does not induce such a change.
authors.affiliation: Doheny Eye Institute, University of Southern California School of Medicine, Los Angeles, USA.
authors.forename: R
authors.initials: R
authors.lastname: Rofougaran
authors.forename: A
authors.initials: A
authors.lastname: Pakkar
authors.forename: W R
authors.initials: WR
authors.lastname: Wee
authors.forename: P J
authors.initials: PJ
authors.lastname: McDonnell
mesh_terms: D002452:Cell Count; D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured / Q000187:drug effects; D002648:Child; D004396:Coloring Agents / Q000494:pharmacology*; D003319:Corneal Stroma / Q000166:cytology* / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D005452:Fluoresceins / Q000494:pharmacology*; D006801:Humans; D008297:Male
chemical_list: D004396:Coloring Agents; D005452:Fluoresceins; C039083:5-((4,6-dichloro-1,3,5-triazin-2-yl)amino)fluorescein