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BMC Ophthalmology
Published in: BMC Ophthalmology 1/2014

Open Access 01-12-2014 | Research article

Five-year incidence of Nd:YAG laser capsulotomy and association with in vitro proliferation of lens epithelial cells from individual specimens: a case control study

Authors: Karin Sundelin, Nawaf Almarzouki, Yalda Soltanpour, Anne Petersen, Madeleine Zetterberg

Published in: BMC Ophthalmology | Issue 1/2014

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Abstract

Background

The aims of this study were to determine the 5-year incidence of posterior capsule opacification (PCO) requiring Nd:YAG laser capsulotomy in a representative mixed cohort of cataract patients, to determine risk factors for PCO and to investigate possible association with growth of human lens epithelial cells (HLEC) in vitro.

Methods

Pieces of the anterior lens capsule and adhering HLEC were obtained at cataract surgery and cultured individually. After one and two weeks respectively, cultured cells were stained with carboxy-fluorescein diacetate succinimidyl ester (CFDA SE), after which image processing software was used to determine the area of the confluent cell layer. The 5-year incidence of Nd:YAG laser capsulotomy in this cohort was determined through medical records and by mail or telephone interviews. For statistic analyses Mann–Whitney U-test, Fisher’s exact test and binary logistic regression were used.

Results

Data on treatment/no treatment for PCO was obtained from 270 patients with a median follow-up time of 57 months (range 50–64 months). The three-year cumulative incidence of PCO was 5.2% and the cumulative 5-year incidence was 11.9%. Patients who had undergone Nd:YAG laser capsulotomy were significantly younger (median 71 years) than patients who did not receive treatment for PCO (median 75 years, p = 0.022). Logistic regression demonstrated that apart from younger age, follow-up time and type of intraocular lens (IOL) were associated with risk of PCO, with hydrophilic 1-piece IOLs conferring a higher risk than hydrophobic acrylic 1-piece or 3-piece IOLs (adjusted OR = 9.4, 95% CI 2.5-35.7, p = 0.001). Of the 270 patients from whom information could be retrieved regarding PCO treatment, in vitro cell culture could be established and quantified from 185 patients. No significant difference in cell growth in vitro was shown between patients subsequently requiring/not requiring Nd:YAG laser capsulotomy.

Conclusions

The cumulative 5-year incidence of 11.9% is comparable or slightly higher than reported in other recent studies. The type of IOL was the most important risk factor for PCO in this study, whereas intrinsic proliferative capacity of the individual’s lens epithelial cells seems to be less important for subsequent PCO development.
Appendix
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Metadata
Title
Five-year incidence of Nd:YAG laser capsulotomy and association with in vitro proliferation of lens epithelial cells from individual specimens: a case control study
Authors
Karin Sundelin
Nawaf Almarzouki
Yalda Soltanpour
Anne Petersen
Madeleine Zetterberg
Publication date
01-12-2014
Publisher
BioMed Central
Published in
BMC Ophthalmology / Issue 1/2014
Electronic ISSN: 1471-2415
DOI
https://doi.org/10.1186/1471-2415-14-116

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