Aims: To evaluate conjunctival expression of trefoil factor family (TFF)1, MUC5AC and human leucocyte antigen (HLA)-DR in patients with glaucoma treated with topical drugs, and to determine whether these parameters can predict the outcome of glaucoma surgery.
Methods: 77 conjunctival impression cytology specimens were collected from 77 patients with glaucoma (66 receiving drops with preservative and 11 treated with preservative-free drops) and 43 controls. TFF1, MUC5AC and HLA-DR expression was analysed using flow cytometry. Trabeculectomy was performed in 56 patients; success was defined as an intraocular pressure (IOP) ⩽15 mm Hg without any IOP-lowering drug at 6 months.
Results: The expression of TFF1, MUC5AC and HLA-DR was significantly higher in patients than in controls (p = 0.01, 0.05 and 0.004, respectively). A higher expression of MUC5AC was found in patients treated with preserved drops than in those receiving unpreserved drops (p = 0.04). A higher MUC5AC expression and a lower HLA-DR expression was observed in successful glaucoma surgeries than in failures.
Conclusions: TFF1 and MUC5AC secretions are probably a response to mild ocular surface changes caused by long-term use of topical treatment. Their increased expression could be a predicting factor of further successful glaucoma surgery.
- HLA, human leucocyte antigen
- IOP, intraocular pressure
- PBS, phosphate-buffered saline
- TTF, trefoil factor family
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Published Online First 29 June 2006
Competing interests: None.
This work has been partly presented as a poster at the ARVO meeting, 2005.
Ethical approval: The protocol of this prospective, observational, case–control study was approved by the local ethics committee of the Burgundy region, located in Dijon, France.