Log in

Concentration-Dependent Inner Retina Layer Damage and Optic Nerve Degeneration in a NMDA Model

  • Published:
Journal of Molecular Neuroscience Aims and scope Submit manuscript

Abstract

The intravitreal injection of N-methyl-d-aspartate (NMDA), a glutamate analogue, is an established model for fast retinal ganglion cell (RGC) degeneration. Yet, NMDA does not cause specific RGC damage. Now, the effects on the whole retina were analyzed. Additionally, the related effects for the structure and apoptotic levels of the optic nerve were investigated. Therefore, different NMDA concentrations were intravitreally injected in rats (20, 40, or 80 nmol NMDA or PBS). At days 3 and 14, Brn-3a+ RGCs were degenerated. A damage of calretinin+ amacrine cells was also recognized at day 14. Only a slight damage was observed in regard to PKCα+ bipolar cells, while rhodopsin+ photoreceptors remained intact. A long-lasting retinal microglia response was observed from day 3 up to day 14. Furthermore, a partial degeneration of the optic nerve was noted. At day 3, the SMI-32+ neurofilaments were just slightly affected, whereas the neurofilament structure was further degenerated at day 14. However, the luxol fast blue (LFB)-stained myelin structure remained intact from day 3 up to day 14. Interestingly, apoptotic mechanisms, like FasL and Fas co-localization as well as caspase 3 activation, were restricted to the optic nerve of the highest NMDA group at this late stage of degeneration. The degeneration of the optic nerve is probably only a side effect of neuronal degeneration of the inner retinal layers. The intact myelin structure might form a barrier against the direct influence of NMDA. In conclusion, this model is very suitable to test therapeutic agents, but it is important to analyze all inner retina layers and the optic nerve to determine their efficacy in this model more precisely.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Subscribe and save

Springer+ Basic
EUR 32.99 /Month
  • Get 10 units per month
  • Download Article/Chapter or Ebook
  • 1 Unit = 1 Article or 1 Chapter
  • Cancel anytime
Subscribe now

Buy Now

Price includes VAT (France)

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10

Similar content being viewed by others

Abbreviations

AIF:

Apoptosis-inducing factor

BCA:

Bicinchoninic acid assay

FasL:

Fas ligand

Fas:

Fas receptor

GFAP:

Glial fibrillary acid protein

HE:

Hematoxylin and eosin

IOP:

Intraocular pressure

LIF:

Leukemia inhibitory factor

MAPK:

MAP kinase

NMDA:

N-Methyl-d-aspartate

NMDA-R:

N-Methyl-d-aspartate receptor

PKCα:

Protein kinase Cα

RGCs:

Retinal ganglion cells

References

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Stephanie C. Joachim.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Kuehn, S., Rodust, C., Stute, G. et al. Concentration-Dependent Inner Retina Layer Damage and Optic Nerve Degeneration in a NMDA Model. J Mol Neurosci 63, 283–299 (2017). https://doi.org/10.1007/s12031-017-0978-x

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12031-017-0978-x

Keywords

Navigation