Journal
EBIOMEDICINE
Volume 11, Issue -, Pages 253-261Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ebiom.2016.08.020
Keywords
Ryanodine receptor; Nitric oxide; Calcium; Seizures; Neurodegeneration
Funding
- JSPS KAKENHI Grant [JP21229004, JP25221304, JP13J00025, JP15K08227, JP15H05648, JP23659037, JP15K06774]
- Takeda Science Foundation
- Mochida Memorial Foundation
- Grants-in-Aid for Scientific Research [16K08507, 14J12293, 15K08227, 25117002, 15K06774, 16K08543] Funding Source: KAKEN
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Status epilepticus (SE) is a life-threatening emergency that can cause neurodegeneration with debilitating neurological disorders. However, the mechanism by which convulsive SE results in neurodegeneration is not fully understood. It has been shown that epileptic seizures produce markedly increased levels of nitric oxide (NO) in the brain, and that NO induces Ca2+ release from the endoplasmic reticulum via the type 1 ryanodine receptor (RyR1), which occurs through S-nitrosylation of the intracellular Ca2+ release channel. Here, we show that through genetic silencing of NO-induced activation of the RyR1 intracellular Ca2+ release channel, neurons were rescued from seizure-dependent cell death. Furthermore, dantrolene, an inhibitor of RyR1, was protective against neurodegeneration caused by SE. These results demonstrate that NO-induced Ca2+ release via RyR is involved in SE-induced neurodegeneration, and provide a rationale for the use of RyR1 inhibitors for the prevention of brain damage following SE. (C) 2016 The Authors. Published by Elsevier B.V.
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