title: Effects of topical antiglaucoma drugs on apoptosis rates of conjunctival epithelial cells in glaucoma patients.
abstract: BACKGROUND
  To investigate the effects of topical antiglaucoma drugs on apoptosis rates of conjunctival epithelial cells in vivo.
  
  
  METHODS
  Specimens were obtained from the bulbar conjunctiva of 30 patients who underwent either cataract or glaucoma surgery. Of these 30 patients, 14 had glaucoma and received topical antiglaucoma drugs. The 16 patients in the control group had neither systemic nor ocular disease except cataract and they did not receive any medications. TUNEL (terminal deoxynucleotidyl transferase-mediated dUTP nick-end labelling) method was used to show the apoptosis of the conjunctival epithelial cells.
  
  
  RESULTS
  Increased apoptosis rates were detected in specimens of patients who were on topical antiglaucoma therapy (mean +/- SD 0.208 +/- 0.154) when compared with the healthy subjects (mean +/- SD 0.083 +/- 0.102; P = 0.013). The apoptosis rates did not differ according to type, number or duration of drugs.
  
  
  CONCLUSIONS
  The apoptosis observed in the conjunctival epithelial cells might be due to the preservative benzalkonium chloride in the antiglaucoma medications because the apoptosis rates did not differ in patients using different types of medications.
authors.affiliation: Department of Ophthalmology, Faculty of Medicine, Hacettepe University, Ankara, Turkey.
authors.forename: Aysun Sanal
authors.initials: AS
authors.lastname: Doğan
authors.forename: Mehmet
authors.initials: M
authors.lastname: Orhan
authors.forename: Figen
authors.initials: F
authors.lastname: Söylemezoğlu
authors.forename: Murat
authors.initials: M
authors.lastname: Irkeç
authors.forename: Banu
authors.initials: B
authors.lastname: Bozkurt
mesh_terms: D000287:Administration, Topical; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000959:Antihypertensive Agents / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D003228:Conjunctiva / Q000473:pathology*; D004847:Epithelial Cells / Q000473:pathology; D005260:Female; D005901:Glaucoma / Q000473:pathology*; D006801:Humans; D020287:In Situ Nick-End Labeling; D008297:Male; D008875:Middle Aged; D009883:Ophthalmic Solutions
chemical_list: D000959:Antihypertensive Agents; D009883:Ophthalmic Solutions