ABHD6 blockade exerts antiepileptic activity in PTZ-induced seizures and in spontaneous seizures in R6/2 mice.

Abstract:

:The serine hydrolase α/β-hydrolase domain 6 (ABHD6) hydrolyzes the most abundant endocannabinoid (eCB) in the brain, 2-arachidonoylglycerol (2-AG), and controls its availability at cannabinoid receptors. We show that ABHD6 inhibition decreases pentylenetetrazole (PTZ)-induced generalized tonic-clonic and myoclonic seizure incidence and severity. This effect is retained in Cnr1(-/-) or Cnr2(-/-) mice, but blocked by addition of a subconvulsive dose of picrotoxin, suggesting the involvement of GABAA receptors. ABHD6 inhibition also blocked spontaneous seizures in R6/2 mice, a genetic model of juvenile Huntington's disease known to exhibit dysregulated eCB signaling. ABHD6 blockade retained its antiepileptic activity over chronic dosing and was not associated with psychomotor or cognitive effects. While the etiology of seizures in R6/2 mice remains unsolved, involvement of the hippocampus is suggested by interictal epileptic discharges, increased expression of vGLUT1 but not vGAT, and reduced Neuropeptide Y (NPY) expression. We conclude that ABHD6 inhibition may represent a novel antiepileptic strategy.

journal_name

Neuron

journal_title

Neuron

authors

Naydenov AV,Horne EA,Cheah CS,Swinney K,Hsu KL,Cao JK,Marrs W,Blankman JL,Tu S,Cherry AE,Fung S,Wen A,Li W,Saporito MS,Selley DE,Cravatt BF,Oakley JC,Stella N

doi

10.1016/j.neuron.2014.06.030

subject

Has Abstract

pub_date

2014-07-16 00:00:00

pages

361-371

issue

2

eissn

0896-6273

issn

1097-4199

journal_volume

83

pub_type

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