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Isoforms of TGF-β in the aqueous humor of patients with pseudoexfoliation syndrome and a possible association with the long-term stability of the capsular bag after cataract surgery

  • Basic Science
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Abstract

Background

Pseudoexfoliation syndrome (PEXS) may go along with capsular bag shrinkage and luxation. In the present study, we focus on an association of isoforms of TGF-β with capsular bag luxation.

Methods

Aqueous humor was collected intraoperatively from 20 healthy controls and from 73 otherwise healthy patients with PEXS [PEXS without complications (PEX, n = 33), late PEXS with glaucoma (PEXG, n = 30) and with IOL and capsular bag luxation (PEXL, n = 10)]. The concentrations of TGF-β1, TGF-β2 and TGF-β3 were compared using the Bio-Plex® multiplex beads system based on the non-parametric Kruskal–Wallis H test (p < 0.01).

Results

Concentrations of TGF-β 1, TGF-β 2 and TGF-β 3 were higher in the sub-groups PEX and PEXG than in controls (TGF-β 1; p = 0.009 and 0.0005; TGF-β 2; p = 0.002 and 0.005 and TGF-β 3; 0.0005 and 0.0005; respectively), whereas for TGF β2, no significant difference between controls and PEXL was revealed (p = 1.0). TGF-β2 concentrations were elevated in a similar degree in early PEX and PEXG, but not in PEXL compared to controls (p = 0.002). The concentrations of of TGF-β 1 and TGF-β 3 increased in parallel with the progression of disease. The levels of TGF-β 3, however, did not attain pathophysiological levels (>100 pg/ml) in any group.

Conclusions

A stage-dependent increase in the concentrations of TGF-β1 and TGF-β3, but not of TGF-β2, accords to the shrinkage of the capsular bag. This could increase the tension on the zonular fibers and contribute to luxation of the capsular bag.

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Authors and Affiliations

  1. Swiss Eye Institute and Berner Augenklinik am Lindenhofspital, Bremgartenstrasse 119, CH-3012, Bern, Switzerland

    Justus G. Garweg, Souska Zandi, Christin Gerhardt & Isabel B. Pfister

  2. University of Bern, Bern, Switzerland

    Justus G. Garweg, Christin Gerhardt & Isabel B. Pfister

Authors
  1. Justus G. Garweg
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  2. Souska Zandi
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  3. Christin Gerhardt
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  4. Isabel B. Pfister
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Correspondence to Justus G. Garweg.

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Financial disclosures

SZ: none; IP: none; CG: none. JGG advises several pharmaceutical companies (including Novartis, Bayer, Alcon, Allergan and AbbVie). None of the authors received financial support for this study or have conflicts of interest with the data that are presented therein.

Funding

The study was partially supported by a grant from the Lindenhof Foundation.

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Garweg, J.G., Zandi, S., Gerhardt, C. et al. Isoforms of TGF-β in the aqueous humor of patients with pseudoexfoliation syndrome and a possible association with the long-term stability of the capsular bag after cataract surgery. Graefes Arch Clin Exp Ophthalmol 255, 1763–1769 (2017). https://doi.org/10.1007/s00417-017-3724-8

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  • DOI: https://doi.org/10.1007/s00417-017-3724-8

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