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Acta Ophthalmol. 2013 Mar;91(2):e92-8. doi: 10.1111/aos.12013. Epub 2012 Dec 20.

Antioxidants reduce TGF-beta2-induced gene expressions in human optic nerve head astrocytes.

Author information

1
Department of Ophthalmology, Ludwig-Maximilians-University, Munich, Germany. alice.yu@med.uni-muenchen.de

Abstract

PURPOSE:

The goal of the present study was to investigate whether the antioxidants vitamin E, vitamin C and vitamin B1 can reduce the transforming growth factor-beta2 (TGF-β2)-induced gene expressions in cultured human optic nerve head (ONH) astrocytes.

METHODS:

Cultured human ONH astrocytes were pretreated with different concentrations of vitamin E, vitamin C and vitamin B1 and then exposed to 1.0 ng/ml TGF-β2 for 24 hr. Expression of the heat shock proteins Hsp27 and αB-crystallin, the extracellular matrix (ECM) component fibronectin and the ECM-modulating protein connective tissue growth factor (CTGF) was detected by immunohistochemistry or real-time PCR analysis.

RESULTS:

TGF-β2 increased the expression of Hsp27, αB-crystallin, fibronectin and CTGF in human ONH astrocytes. Pretreatment with different concentrations of vitamin E, vitamin C and vitamin B1 reduced the TGF-β2-stimulated gene expressions.

CONCLUSION:

In cultured human ONH astrocytes, the TGF-β2-stimulated gene expressions could be reduced by pretreatment with vitamin E, vitamin C and vitamin B1. Therefore, the use of antioxidants in glaucomatous optic neuropathy might be a promising approach to prevent TGF-β2-induced cellular changes in ONH astrocytes.

PMID:
23280001
DOI:
10.1111/aos.12013
[Indexed for MEDLINE]
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