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Proteasome inhibition results in increased poly‐ADP‐ribosylation: Implications for neuron death
Author(s) -
Keller Jeffrey N.,
Markesbery William R.
Publication year - 2000
Publication title -
journal of neuroscience research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.72
H-Index - 160
eISSN - 1097-4547
pISSN - 0360-4012
DOI - 10.1002/1097-4547(20000815)61:4<436::aid-jnr10>3.0.co;2-z
Subject(s) - lactacystin , proteasome , neuroprotection , toxicity , neuron , programmed cell death , pharmacology , chemistry , proteasome inhibitor , biology , biochemistry , apoptosis , neuroscience , organic chemistry
This study demonstrates the ability of proteasome inhibitors (lactacystin, MG 115, MG 132) adenosine diphosphate to induce a time‐ and dose‐dependent increase in poly‐ADP‐ribosylation (PAR) in the neural PC6 cell line, a subclone of PC12 cells. Elevated levels of PAR contribute to the toxicity associated with impaired proteasome activity, based on the ability of PAR inhibitors to ameliorate the toxicity associated with the application of lactacystin, MG 115, and MG 132. Proteasome inhibitors induced the accumulation of PAR and neuron death in primary hippocampal neuron cultures, which were both ameliorated by treatment with PAR inhibitors. Together, these data indicate a role for increased PAR in the toxicity associated with proteasome inhibition, and suggest that inhibitors of PAR may provide neuroprotection in conditions where proteasome inhibition occurs. J. Neurosci. Res. 61:436–442, 2000. © 2000 Wiley‐Liss, Inc.