Paired Immunoglobulin-like Receptor B Inhibition in Müller Cells Promotes Neurite Regeneration After Retinal Ganglion Cell Injury in vitro.
10.1007/s12264-020-00510-w
- Author:
Rongdi YUAN
1
;
Mei YANG
1
;
Wei FAN
1
;
Jian LAN
1
;
Yuan-Guo ZHOU
2
Author Information
1. Department of Ophthalmology, Xinqiao Hospital, Army Medical University, Chongqing, 400037, China.
2. The Molecular Biology Centre, State Key Laboratory of Trauma, Burn and Combined Injury, Research Institute of Surgery and Daping Hospital, Army Medical University, Chongqing, 400042, China. yuanguo.zhou@gmail.com.
- Publication Type:Journal Article
- Keywords:
Ciliary neurotrophic factor;
Müller cell;
Neurite regeneration;
Retina ganglion cell injury
- From:
Neuroscience Bulletin
2020;36(9):972-984
- CountryChina
- Language:English
-
Abstract:
In the central nervous system (CNS), three types of myelin-associated inhibitors (MAIs) have major inhibitory effects on nerve regeneration. They include Nogo-A, myelin-associated glycoprotein, and oligodendrocyte-myelin glycoprotein. MAIs possess two co-receptors, Nogo receptor (NgR) and paired immunoglobulin-like receptor B (PirB). Previous studies have confirmed that the inhibition of NgR only results in a modest increase in regeneration in the CNS; however, the inhibitory effects of PirB with regard to nerve regeneration after binding to MAIs remain controversial. In this study, we demonstrated that PirB is expressed in primary cultures of retinal ganglion cells (RGCs), and the inhibitory effects of the three MAIs on the growth of RGC neurites are not significantly decreased after direct PirB knockdown using adenovirus PirB shRNA. Interestingly, we found that retinal Müller cells expressed PirB and that its knockdown enhanced the regeneration of co-cultured RGC neurites. PirB knockdown also activated the JAK/Stat3 signaling pathway in Müller cells and upregulated ciliary neurotrophic factor levels. These findings indicate that PirB plays a novel role in retinal Müller cells and that its action in these cells may indirectly affect the growth of RGC neurites. The results also reveal that PirB in Müller cells affects RGC neurite regeneration. Our findings provide a novel basis for the use of PirB as a target molecule to promote nerve regeneration.
