Nuclear factor-kappa B p65 in NMDA-induced retinal neurotoxicity

• Published in: Brain research. Molecular brain research. Vol. 131; no. 1; pp. 8 - 16
• Main Authors: Kitaoka, Yasushi, Kumai, Toshio, Kitaoka, Yuka, Lam, Tim T., Munemasa, Yasunari, Isenoumi, Kazuyuki, Motoki, Masamitsu, Kuribayashi, Kohei, Kogo, Jiro, Kobayashi, Shinichi, Ueno, Satoki
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 24-11-2004; Elsevier
• Subjects: Animals; Antisense oligodeoxynucleotides; Biological and medical sciences; Cell Death - drug effects; Electrophoretic mobility shift assay; Excitatory Amino Acid Agonists - toxicity; Eye and associated structures. Visual pathways and centers. Vision; Fundamental and applied biological sciences. Psychology; Male; Microinjections; N-methyl- d-aspartate; N-Methylaspartate - toxicity; Neuroprotection; Neuroprotective Agents - pharmacology; NF-kappa B - genetics; NF-kappa B - metabolism; Nuclear factor-κB; Oligodeoxyribonucleotides, Antisense - pharmacology; Rats; Rats, Wistar; Retina; Retina - drug effects; Retina - pathology; Retinal Diseases - chemically induced; Retinal Diseases - pathology; Retinal Diseases - therapy; Thy-1 mRNA; Transcription Factor RelA; Transcription factors; Vertebrates: nervous system and sense organs; Neuroprotection; Transcription factors; N-methyl- d-aspartate; Electrophoretic mobility shift assay; Antisense oligodeoxynucleotides; Retina; Nuclear factor-κB; Neurotransmitters, modulators, transporters, and receptors; Thy-1 mRNA; Eye; Visual system; Neurotoxicity; Electrophoretic mobility; NMDA; N-methyl-D-aspartate; Transcription factor NFκB; Transcription factor
• ISSN: 0169-328X; 1872-6941
• DOI: 10.1016/j.molbrainres.2004.07.021

Transcription factors of the nuclear factor-kappa B (NF-κB)/Rel family may be involved in neuronal cell death or survival. We examined the role of NF-κB p65 in
N-methyl-
d-aspartate (NMDA)-induced neurotoxicity in the rat retina. Western blot analysis showed that elevated levels of retinal NF-κB p65 protein at days 1 and 5 after intravitreal NMDA injection. Immunohistochemistry localized increased NF-κB p65 immunoreactivity in the ganglion cell layer (GCL) and the inner nuclear layer (INL) after NMDA injection especially in retinal ganglion cells (RGCs), displaced amacrine cells, and amacrine cells. Concomitant with the early increase in NF-κB p65 protein levels, there was an increase in NF-κB DNA binding activity after NMDA injection as shown by electrophoretic mobility shift assay (EMSA). These increases in NF-κB p65 protein levels and NF-κB DNA binding activity were totally abolished by simultaneous injection of NF-κB p65 antisense oligodeoxynucleotide (AS ODN). A partial but significant protective effect on the inner retina was noted when the AS ODN was given together with NMDA as shown by morphological analysis, morphometry of cells in the GCL and morphometry of inner plexiform layer thickness as well as quantitative real-time PCR of Thy-1 mRNA levels. These results suggest that activated NF-κB p65 may participate in NMDA-induced retinal neuronal cell death and that inhibition of NF-κB activation such as the use of AS ODN may be a viable neuroprotective strategy for protective RGCs and other inner retinal neurons.