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BioMed Research International
Volume 2013 (2013), Article ID 761823, 7 pages
http://dx.doi.org/10.1155/2013/761823
Research Article

Increased Expression of CCN2 in the Red Flashing Light-Induced Myopia in Guinea Pigs

Department of Ophthalmology, Qilu Hospital, Shandong University, 107 Wenhua Xi Road, Jinan 250012, China

Received 6 April 2013; Revised 11 June 2013; Accepted 18 June 2013

Academic Editor: Youhua Liu

Copyright © 2013 Hong Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Visual environment plays an important role in the occurrence of myopia. We previously showed that the different flashing lights could result in distinct effects on the ocular growth and development of myopia. CCN2 has been reported to regulate various cellular functions and biological processes. However, whether CCN2 signaling was involved in the red flashing light-induced myopia still remains unknown. In the present study, we investigated the effects of the red flashing lights exposure on the refraction and axial length of the eyes in vivo and then evaluated their effects on the expression of CCN2 and TGF-β in sclera tissues. Our data showed that the eyes exposed to the red flashing light became more myopic with a significant increase of the axial length and decrease of the refraction. Both CCN2 and TGF-β, as well as p38 MAPK and PI3K, were highly expressed in the sclera tissues exposed to the red flashing light. Both CCN2 and TGF-β were found to have the same gene expression profile in vivo. In conclusion, our findings found that CCN2 signaling pathway plays an important role in the red flashing light-induced myopia in vivo. Moreover, our study establishes a useful animal model for experimental myopia research.