Netrin-1 promotes epithelium repair in corneal injury
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Corresponding Author:

Yi Shao. Department of Ophthalmology, the First Affiliated Hospital of Nanchang University, No.17, Yongwaizheng Street, Donghu District, Nanchang 330006, Jiangxi Province, China. freebee99@163.com

Fund Project:

Supported by the National Natural Science Foundation of China (No.81300729; No.81160118; No.81460092; No.81660158); Natural Science Foundation of Fujian Province (No.2015J05170).

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    Abstract:

    AIM: To explore netrin-1 functions on corneal epithelium in vitro and in vivo. METHODS: In vitro the human corneal epithelial (HCE) cells were treated with serum free DMEM-F12 basic media containing 0, 50, 100, 200, 300, 500, 800, and 1000 ng/mL of netrin-1, respectively. The cells viability was detected by cell counting kit-8 (CCK-8). The wound-healing assay was applied to assess the migration proficiency of HCE cells. Flow cytometry was used to analyze the cell-cycle distribution and apoptosis. In vivo, normal c57 (6wk) mice were demarcated with a trephine in the middle of the cornea to produce a 3-mm circular wound. Mice corneas were inflicted no epithelium with a 3-mm wound displayed, but remained the limbal epithelium intact. A blunt scalpel blade was used to remove the corneal epithelian cells, followed by topical netrin-1 application (200 ng/mL), and the group treated by PBS as control. The treated group was injected netrin-1 into the normal c57 mice inferior subconjunctival 4h before trauma. Mouse corneal inflammation and neovascularization were observed under slit lamp microscope. The apoptosis of corneal cells was determined by TUNEL staining. CONCLUSION: Netrin-1 can reduce HCE apoptosis as well as promote its proliferation and migration. Topical application of netrin-1 promotes the injuryed cornea epithelial wound repair and inhibits apoptosis of corneal epithelial cells. These findings may offer potential therapies to repair the defects of corneal epithelial based on netrin-1.

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Han Y, Jiang N, Su T,/et al.Netrin-1 promotes epithelium repair in corneal injury. Int J Ophthalmol 2020;13(2):206-212

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Publication History
  • Received:August 10,2018
  • Revised:December 25,2019
  • Online: February 03,2020