Abstract
Although the aberrant assembly of mutant superoxide dismutase 1 (mSOD1) is implicated in the pathogenesis of familial amyotrophic lateral sclerosis (ALS), the molecular basis of superoxide dismutase 1 (SOD1) oligomerization remains undetermined. We investigated the roles of transglutaminase 2 (TG2), an endogenous cross-linker in mSOD1-linked ALS. TG2 interacted preferentially with mSOD1 and promoted its oligomerization in transfected cells. Purified TG2 directly oligomerized recombinant mutant SOD1 and the apo-form of the wild-type SOD1 proteins in a calcium-dependent manner, indicating that misfolded SOD1 is a substrate of TG2. Moreover, the non-cell-autonomous effect of extracellular TG2 on the neuroinflammation was suggested, since the TG2-mediated soluble SOD1 oligomers induced tumor necrosis factor-α, interleukin-1β, and nitric oxide in microglial BV2 cells. TG2 was up-regulated in the spinal cord of pre-symptomatic G93A SOD1 transgenic mice and in the hypoglossal nuclei of mice suffering nerve ligation. Furthermore, inhibition of spinal TG2 by cystamine significantly delayed the progression and reduced SOD1 oligomers and microglial activation. These results indicate a novel role of TG2 in SOD1 oligomer-mediated neuroinflammation, as well as in the involvement in the intracellular aggregation of misfolded SOD1 in ALS.
| Original language | English |
|---|---|
| Pages (from-to) | 403-418 |
| Number of pages | 16 |
| Journal | Journal of Neurochemistry |
| Volume | 128 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Feb 1 2014 |
Fingerprint
Keywords
- amyotrophic lateral sclerosis
- microglia
- non-cell-autonomous
- oligomer
- superoxide dismutase 1
- transglutaminase 2
ASJC Scopus subject areas
- Biochemistry
- Cellular and Molecular Neuroscience
Cite this
Transglutaminase 2 accelerates neuroinflammation in amyotrophic lateral sclerosis through interaction with misfolded superoxide dismutase 1. / Oono, Miki; Okado-Matsumoto, Ayako; Shodai, Akemi; Ido, Akemi; Ohta, Yasuyuki; Abe, Koji; Ayaki, Takashi; Ito, Hidefumi; Takahashi, Ryosuke; Taniguchi, Naoyuki; Urushitani, Makoto.
In: Journal of Neurochemistry, Vol. 128, No. 3, 01.02.2014, p. 403-418.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Transglutaminase 2 accelerates neuroinflammation in amyotrophic lateral sclerosis through interaction with misfolded superoxide dismutase 1
AU - Oono, Miki
AU - Okado-Matsumoto, Ayako
AU - Shodai, Akemi
AU - Ido, Akemi
AU - Ohta, Yasuyuki
AU - Abe, Koji
AU - Ayaki, Takashi
AU - Ito, Hidefumi
AU - Takahashi, Ryosuke
AU - Taniguchi, Naoyuki
AU - Urushitani, Makoto
PY - 2014/2/1
Y1 - 2014/2/1
N2 - Although the aberrant assembly of mutant superoxide dismutase 1 (mSOD1) is implicated in the pathogenesis of familial amyotrophic lateral sclerosis (ALS), the molecular basis of superoxide dismutase 1 (SOD1) oligomerization remains undetermined. We investigated the roles of transglutaminase 2 (TG2), an endogenous cross-linker in mSOD1-linked ALS. TG2 interacted preferentially with mSOD1 and promoted its oligomerization in transfected cells. Purified TG2 directly oligomerized recombinant mutant SOD1 and the apo-form of the wild-type SOD1 proteins in a calcium-dependent manner, indicating that misfolded SOD1 is a substrate of TG2. Moreover, the non-cell-autonomous effect of extracellular TG2 on the neuroinflammation was suggested, since the TG2-mediated soluble SOD1 oligomers induced tumor necrosis factor-α, interleukin-1β, and nitric oxide in microglial BV2 cells. TG2 was up-regulated in the spinal cord of pre-symptomatic G93A SOD1 transgenic mice and in the hypoglossal nuclei of mice suffering nerve ligation. Furthermore, inhibition of spinal TG2 by cystamine significantly delayed the progression and reduced SOD1 oligomers and microglial activation. These results indicate a novel role of TG2 in SOD1 oligomer-mediated neuroinflammation, as well as in the involvement in the intracellular aggregation of misfolded SOD1 in ALS.
AB - Although the aberrant assembly of mutant superoxide dismutase 1 (mSOD1) is implicated in the pathogenesis of familial amyotrophic lateral sclerosis (ALS), the molecular basis of superoxide dismutase 1 (SOD1) oligomerization remains undetermined. We investigated the roles of transglutaminase 2 (TG2), an endogenous cross-linker in mSOD1-linked ALS. TG2 interacted preferentially with mSOD1 and promoted its oligomerization in transfected cells. Purified TG2 directly oligomerized recombinant mutant SOD1 and the apo-form of the wild-type SOD1 proteins in a calcium-dependent manner, indicating that misfolded SOD1 is a substrate of TG2. Moreover, the non-cell-autonomous effect of extracellular TG2 on the neuroinflammation was suggested, since the TG2-mediated soluble SOD1 oligomers induced tumor necrosis factor-α, interleukin-1β, and nitric oxide in microglial BV2 cells. TG2 was up-regulated in the spinal cord of pre-symptomatic G93A SOD1 transgenic mice and in the hypoglossal nuclei of mice suffering nerve ligation. Furthermore, inhibition of spinal TG2 by cystamine significantly delayed the progression and reduced SOD1 oligomers and microglial activation. These results indicate a novel role of TG2 in SOD1 oligomer-mediated neuroinflammation, as well as in the involvement in the intracellular aggregation of misfolded SOD1 in ALS.
KW - amyotrophic lateral sclerosis
KW - microglia
KW - non-cell-autonomous
KW - oligomer
KW - superoxide dismutase 1
KW - transglutaminase 2
UR - http://www.scopus.com/inward/record.url?scp=84897019327&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84897019327&partnerID=8YFLogxK
U2 - 10.1111/jnc.12441
DO - 10.1111/jnc.12441
M3 - Article
C2 - 24032595
AN - SCOPUS:84897019327
VL - 128
SP - 403
EP - 418
JO - Journal of Neurochemistry
JF - Journal of Neurochemistry
SN - 0022-3042
IS - 3
ER -