CIIA prevents SOD1(G93A)-induced cytotoxicity by blocking ASK1-mediated signaling

Jae Keun Lee, Sang Gil Hwang, Jin Hee Shin, Jaekyung Shim, Eui Ju Choi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Amyotrophic lateral sclerosis (ALS) is an adult-onset neurodegenerative disease with higher selectivity in degeneration of motor neurons. However, the molecular mechanism by which the ALS-linked mutants of human superoxide dismutase 1 (SOD1) gene induce neurotoxicity remains obscure yet. Here, we show that depletion of CIIA expression by RNA interference (RNAi) promoted cytotoxicity caused by ALS-linked G93A mutant of the SOD1 gene. The RNAi-mediated knockdown of CIIA also enhanced the SOD1(G93A)-induced interaction between ASK1 and TRAF2 as well as ASK1 activity. Furthermore, endogenous silencing of CIIA by RNAi augmented the effects of SOD1(G93A) on reduction of mitochondria membrane potential (Δψm), release of cytochrome c into the cytoplasm, and caspase activation. Together, our results suggest that CIIA negatively modulates ASK1-mediated cytotoxic signaling processes in a SOD1(G93A)-expressing cellular model of ALS.

Original languageEnglish
Article number179
JournalFrontiers in Cellular Neuroscience
Issue numberJUN
Publication statusPublished - 2014


  • ALS (amyotrophic lateral sclerosis)
  • ASK1 (apoptosis signal-regulating kinase 1)
  • Cytotoxicity
  • Mitochondria
  • ROS (reactive oxygen species)

ASJC Scopus subject areas

  • Cellular and Molecular Neuroscience


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