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2016 ; 41
(7
): 1768-78
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Effect of the Putative Lithium Mimetic Ebselen on Brain Myo-Inositol, Sleep, and
Emotional Processing in Humans
#MMPMID26593266
Singh N
; Sharpley AL
; Emir UE
; Masaki C
; Herzallah MM
; Gluck MA
; Sharp T
; Harmer CJ
; Vasudevan SR
; Cowen PJ
; Churchill GC
Neuropsychopharmacology
2016[Jun]; 41
(7
): 1768-78
PMID26593266
show ga
Lithium remains the gold standard in treating bipolar disorder but has unwanted
toxicity and side effects. We previously reported that ebselen inhibits inositol
monophosphatase (IMPase) and exhibits lithium-like effects in animal models
through lowering of inositol. Ebselen has been tested in clinical trials for
other disorders, enabling us to determine for the first time the effect of a
blood-brain barrier-penetrant IMPase inhibitor on human central nervous system
(CNS) function. We now report that in a double-blind, placebo-controlled trial
with healthy participants, acute oral ebselen reduced brain myo-inositol in the
anterior cingulate cortex, consistent with CNS target engagement. Ebselen
decreased slow-wave sleep and affected emotional processing by increasing
recognition of some emotions, decreasing latency time in the acoustic startle
paradigm, and decreasing the reinforcement of rewarding stimuli. In summary,
ebselen affects the phosphoinositide cycle and has CNS effects on surrogate
markers that may be relevant to the treatment of bipolar disorder that can be
tested in future clinical trials.