Cimarosti H, Ashikaga E, Jaafari N, Dearden L, Rubin P, Wilkinson KA, Henley JM. Enhanced SUMOylation and SENP-1 protein levels following oxygen and glucose deprivation in neurones.
J Cereb Blood Flow Metab 2012;
32:17-22. [PMID:
21989481 PMCID:
PMC3308141 DOI:
10.1038/jcbfm.2011.146]
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Abstract
Here, we show that oxygen and glucose deprivation (OGD) causes increased small ubiquitin-like modifier (SUMO)-1 and SUMO-2/3 conjugation to substrate proteins in cultured hippocampal neurones. Surprisingly, the SUMO protease SENP-1, which removes SUMO from conjugated proteins, was also increased by OGD, suggesting that the neuronal response to OGD involves a complex interplay between SUMOylation and deSUMOylation. Importantly, decreasing global SUMOylation in cultured hippocampal neurones by overexpression of the catalytic domain of SENP-1 increased neuronal vulnerability to OGD-induced cell death. Taken together, these results suggest a neuroprotective role for neuronal SUMOylation after OGD.
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