Dichlorotriazinyl aminofluorescein inhibits human keratocyte proliferation in vitro

Roya Rofougaran, Alireza Pakkar, Won Ryang Wee, Peter J. McDonnell

Research output: Contribution to journalArticlepeer-review


PURPOSE: Dichlorotriazinyl aminofiuorescein (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 I 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 I hour exposure of keratocytes to the drug did not inhibit keratocyte proliferation. CONCLUSION: 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.

Original languageEnglish (US)
Pages (from-to)568-570
Number of pages3
JournalJournal of Refractive Surgery
Issue number6
StatePublished - Sep 1 1997
Externally publishedYes

ASJC Scopus subject areas

  • Surgery
  • Ophthalmology


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