Journal articles
Stathmin 1/2-triggered microtubule loss mediates Golgi fragmentation in mutant SOD1 motor neurons
Abstract : Background: Pathological Golgi fragmentation represents a constant pre-clinical feature of many neurodegenerative diseases including amyotrophic lateral sclerosis (ALS) but its molecular mechanisms remain hitherto unclear.
Results: Here, we show that the severe Golgi fragmentation in transgenic mutant SOD1 G85R and SOD1 G93A mouse motor neurons is associated with defective polymerization of Golgi-derived microtubules, loss of the COPI coat subunit β-COP, cytoplasmic dispersion of the Golgi tether GM130, strong accumulation of the ER-Golgi v-SNAREs GS15 and GS28 as well as tubular/vesicular Golgi fragmentation. Data mining, transcriptomic and protein analyses demonstrate that both SOD1 mutants cause early presymptomatic and rapidly progressive up-regulation of the microtubule-destabilizing proteins Stathmins 1 and 2. Remarkably, mutant SOD1-triggered Golgi fragmentation and Golgi SNARE accumulation are recapitulated by Stathmin 1/2 overexpression but completely rescued by Stathmin 1/2 knockdown or the microtubule-stabilizing drug Taxol.
Conclusions: We conclude that Stathmin-triggered microtubule destabilization mediates Golgi fragmentation in mutant SOD1-linked ALS and potentially also in related motor neuron diseases.
Cited literature [71 references]
https://hal-amu.archives-ouvertes.fr/hal-01463801
Contributor : Gilbert Baillat Connect in order to contact the contributor
Submitted on : Tuesday, February 14, 2017 - 9:05:27 AM
Last modification on : Monday, December 13, 2021 - 9:14:07 AM
Long-term archiving on: : Monday, May 15, 2017 - 12:20:13 PM
Contributor : Gilbert Baillat Connect in order to contact the contributor
Submitted on : Tuesday, February 14, 2017 - 9:05:27 AM
Last modification on : Monday, December 13, 2021 - 9:14:07 AM
Long-term archiving on: : Monday, May 15, 2017 - 12:20:13 PM
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mol degenr 2016.pdf
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