Nogo-A-targeting Antibody Promotes Visual Recovery and Inhibits Neuroinflammation After Retinal Injury
Overview
General Medicine
Authors
Affiliations
N-Methyl-D-aspartate (NMDA)-induced neuronal cell death is involved in a large spectrum of diseases affecting the brain and the retina such as Alzheimer's disease and diabetic retinopathy. Associated neurological impairments may result from the inhibition of neuronal plasticity by Nogo-A. The objective of the current study was to determine the contribution of Nogo-A to NMDA excitotoxicity in the mouse retina. We observed that Nogo-A is upregulated in the mouse vitreous during NMDA-induced inflammation. Intraocular injection of a function-blocking antibody specific to Nogo-A (11C7) was carried out 2 days after NMDA-induced injury. This treatment significantly enhanced visual function recovery in injured animals. Strikingly, the expression of potent pro-inflammatory molecules was downregulated by 11C7, among which TNFα was the most durably decreased cytokine in microglia/macrophages. Additional analyses suggest that TNFα downregulation may stem from cofilin inactivation in microglia/macrophages. 11C7 also limited gliosis presumably via P.Stat3 downregulation. Diabetic retinopathy was associated with increased levels of Nogo-A in the eyes of donors. In summary, our results reveal that Nogo-A-targeting antibody can stimulate visual recovery after retinal injury and that Nogo-A is a potent modulator of excitotoxicity-induced neuroinflammation. These data may be used to design treatments against inflammatory eye diseases.
Luo Y, Qu J, He Z, Zhang M, Zou Z, Li L Cell Transplant. 2023; 32:9636897231210069.
PMID: 37982384 PMC: 10664427. DOI: 10.1177/09636897231210069.
Anti-inflammatory Effects of Siponimod in a Mouse Model of Excitotoxicity-Induced Retinal Injury.
Basavarajappa D, Gupta V, Chitranshi N, Viswanathan D, Gupta V, Vander Wall R Mol Neurobiol. 2023; 60(12):7222-7237.
PMID: 37542647 PMC: 10657799. DOI: 10.1007/s12035-023-03535-0.
Microglial Nogo delays recovery following traumatic brain injury in mice.
Glotfelty E, Hsueh S, Claybourne Q, Bedolla A, Kopp K, Wallace T Glia. 2023; 71(10):2473-2494.
PMID: 37401784 PMC: 10528455. DOI: 10.1002/glia.24436.
Nogo-A and LINGO-1: Two Important Targets for Remyelination and Regeneration.
Kalafatakis I, Papagianni F, Theodorakis K, Karagogeos D Int J Mol Sci. 2023; 24(5).
PMID: 36901909 PMC: 10003089. DOI: 10.3390/ijms24054479.
Sharif N Curr Res Neurobiol. 2023; 3:100037.
PMID: 36685768 PMC: 9846481. DOI: 10.1016/j.crneur.2022.100037.