Regulatory mechanism of melatonin on the retinal ganglion cell photoreaction in mice

Li,Jianqiao; Hong,Jiongwan; Zhou,Fang; Tang,Shibo; Wu,Xinyi

doi:10.3892/etm.2017.4672

August-2017 Volume 14 Issue 2

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August-2017 Volume 14 Issue 2

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Article Open Access

Regulatory mechanism of melatonin on the retinal ganglion cell photoreaction in mice

Authors:
- Jianqiao Li
- Jiongwan Hong
- Fang Zhou
- Shibo Tang
- Xinyi Wu
View Affiliations / Copyright

Affiliations: Department of Ophthalmology, Qilu Hospital of Shandong University, Jinan, Shandong 250012, P.R. China, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, Guangdong 510060, P.R. China

Copyright: © Li et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
Pages: 1491-1495
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Published online on: June 26, 2017

https://doi.org/10.3892/etm.2017.4672
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Abstract

The study aimed to analyze the regulatory mechanism of melatonin (MLT) on the retinal ganglion cell photoreaction in mice. Forty-eight, 3-week‑old healthy ICR mice, regardless of gender, were randomly divided into 4 groups. Group A was exposed to an illumination/dark time of 0 h/24 h, 6 h/18 h in group B, 12 h/12 h in group C and 18 h/6 h in group D, for up to 6 weeks. Four mice in each group were sacrificed at week 1, 3 and 6, respectively, for harvesting of retinal ganglion cells. ELISA was used to detect nocturnal plasma MLT levels at midnight. Immunohistochemistry was used to detect the expression of the retinal MLT receptor and the expression levels of inducible nitric oxide synthase (iNOS) and c-fos protein. The plasma MLT levels, MLT receptor levels and c-fos protein expression levels of group C, after 1, 3 and 6 weeks of light application, were the highest, followed by groups B and D, while group A had the lowest levels. For each illumination time, the iNOS levels of group C were the lowest and group A was the highest. Differences were all statistically significant (P<0.05). In conclusion, appropriate illumination regimens can increase c-fos protein, decrease iNOS activity and regulate the physiological activities of the retinal ganglion cells by regulating the expressions of MLT and its receptor.

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Journals

International Journal of Molecular Medicine

International Journal of Oncology

Molecular Medicine Reports

Oncology Reports

Experimental and Therapeutic Medicine

Oncology Letters

Biomedical Reports

Molecular and Clinical Oncology

World Academy of Sciences Journal

International Journal of Functional Nutrition

International Journal of Epigenetics

Medicine International

Regulatory mechanism of melatonin on the retinal ganglion cell photoreaction in mice

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