Abstract | BACKGROUND AND PURPOSE: METHODS: We examined the postmortem brains and the spinal cords of three FALS cases (A4V SOD1 mutant). Transgenic mice expressing the G93A mutant human SOD1 (mutant SOD1-Tg mice), transgenic mice expressing the wild-type human SOD1 (wild-type SOD1-Tg mice), and non-Tg wild-type mice were also subjected to the immunohistochemical analysis. RESULTS: In all the FALS patients, LBHIs were observed in the cytoplasm of the anterior horn cells, and these inclusions were immunopositive intensely for pan 14-3-3, 14-3-3β, and 14-3-3γ. In the mutant SOD1-Tg mice, a high degree of immunoreactivity for misfolded SOD1 (C4F6) was observed in the cytoplasm, with an even greater degree of immunoreactivity present in the cytoplasmic aggregates of the anterior horn cells in the lumbar spinal cord. Furthermore, we have found increased 14-3-3β and 14-3-3γ immunoreactivities in the mutant SOD1-Tg mice. Double immunofluorescent staining showed that C4F6 and 14-3-3 proteins were partially co-localized in the spinal cord with FALS and the mutant SOD1-Tg mice. In comparison, the wild-type SOD1-Tg and non-Tg wild-type mice showed no or faint immunoreactivity for C4F6 and 14-3-3 proteins (pan 14-3-3, 14-3-3β, and 14-3-3γ) in any neuronal compartments. DISCUSSION: These results suggest that 14-3-3 proteins may be associated with the formation of SOD1-containing inclusions, in FALS patients and the mutant SOD1-Tg mice.
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Authors | Yoko Okamoto, Yoshitomo Shirakashi, Masafumi Ihara, Makoto Urushitani, Miki Oono, Yasuhiro Kawamoto, Hirofumi Yamashita, Shun Shimohama, Shinsuke Kato, Asao Hirano, Hidekazu Tomimoto, Hidefumi Ito, Ryosuke Takahashi |
Journal | PloS one
(PLoS One)
Vol. 6
Issue 5
Pg. e20427
( 2011)
ISSN: 1932-6203 [Electronic] United States |
PMID | 21655264
(Publication Type: Journal Article)
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Chemical References |
- 14-3-3 Proteins
- SOD1 protein, human
- Sod1 protein, mouse
- Superoxide Dismutase
- Superoxide Dismutase-1
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Topics |
- 14-3-3 Proteins
(genetics, metabolism)
- Aged
- Amyotrophic Lateral Sclerosis
(metabolism)
- Animals
- Humans
- Hyalin
(metabolism)
- Immunohistochemistry
- In Vitro Techniques
- Inclusion Bodies
(metabolism)
- Lewy Bodies
(metabolism)
- Male
- Mice
- Mice, Transgenic
- Middle Aged
- Superoxide Dismutase
(genetics, metabolism)
- Superoxide Dismutase-1
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