From Wikipedia, the free encyclopedia
Chemical compound
Loreclezole is a
sedative and an
anticonvulsant which acts as a
GABAA receptor
positive allosteric modulator .
[1] The binding site of loreclezole has been shown experimentally to be shared by
valerenic acid , an extract of the root of the
valerian plant.
[2] Structurally, loreclezole is a triazole derivative. In animal seizure models, loreclezole is protective against
pentylenetetrazol seizures but is less active in the maximal electroshock test.
[3] In addition, at low, nontoxic doses, the drug has anti-absence activity in a genetic model of generalized absence epilepsy. Consequently, loreclezole has a profile of activity similar to that of
benzodiazepines . A potential benzodiazepine-like interaction with GABA receptors is suggested by the observation that the anticonvulsant effects of loreclezole can be reversed by benzodiazepine receptor inverse agonists. The benzodiazepine antagonist
flumazenil , however, fails to alter the anticonvulsant activity of loreclezole, indicating that loreclezole is not a benzodiazepine receptor agonist. Using native rat and cloned human GABA-A receptors, loreclezole strongly potentiated GABA-activated chloride current. However, activity of the drug did not require the presence of the γ-subunit and was not blocked by flumazenil, confirming that loreclezole does not interact with the benzodiazepine recognition site.
References
^ Wingrove PB, Wafford KA, Bain C, Whiting PJ (May 1994).
"The modulatory action of loreclezole at the gamma-aminobutyric acid type A receptor is determined by a single amino acid in the beta 2 and beta 3 subunit" . Proceedings of the National Academy of Sciences of the United States of America . 91 (10): 4569–73.
Bibcode :
1994PNAS...91.4569W .
doi :
10.1073/pnas.91.10.4569 .
PMC
43827 .
PMID
8183949 .
^ Khom S, Baburin I, Timin E, Hohaus A, Trauner G, Kopp B, Hering S (July 2007). "Valerenic acid potentiates and inhibits GABA(A) receptors: molecular mechanism and subunit specificity". Neuropharmacology . 53 (1): 178–87.
doi :
10.1016/j.neuropharm.2007.04.018 .
PMID
17585957 .
S2CID
7613630 .
^ Rogawski M (1996).
"Epilepsy" . In Pullan L, Patel J (eds.). Neurotherapeutics: Emerging Strategies . Humana Press. pp. 193–273.
Ionotropic
GABAA Tooltip γ-Aminobutyric acid A receptor
Positive modulators (abridged; see
here for a full list):
α-EMTBL
Alcohols (e.g.,
drinking alcohol ,
2M2B )
Anabolic steroids
Avermectins (e.g.,
ivermectin )
Barbiturates (e.g.,
phenobarbital )
Benzodiazepines (e.g.,
diazepam )
Bromide compounds (e.g.,
potassium bromide )
Carbamates (e.g.,
meprobamate )
Carbamazepine
Chloralose
Chlormezanone
Clomethiazole
Dihydroergolines (e.g.,
ergoloid (dihydroergotoxine) )
Etazepine
Etifoxine
Fenamates (e.g.,
mefenamic acid )
Flavonoids (e.g.,
apigenin ,
hispidulin )
Fluoxetine
Flupirtine
Imidazoles (e.g.,
etomidate )
Kava constituents (e.g.,
kavain )
Lanthanum
Loreclezole
Monastrol
Neuroactive steroids (e.g.,
allopregnanolone ,
cholesterol ,
THDOC )
Niacin
Niacinamide
Nonbenzodiazepines (e.g.,
β-carbolines (e.g.,
abecarnil ),
cyclopyrrolones (e.g.,
zopiclone ),
imidazopyridines (e.g.,
zolpidem ),
pyrazolopyrimidines (e.g.,
zaleplon ))
Norfluoxetine
Petrichloral
Phenols (e.g.,
propofol )
Phenytoin
Piperidinediones (e.g.,
glutethimide )
Propanidid
Pyrazolopyridines (e.g.,
etazolate )
Quinazolinones (e.g.,
methaqualone )
Retigabine (ezogabine)
ROD-188
Skullcap constituents (e.g.,
baicalin )
Stiripentol
Sulfonylalkanes (e.g.,
sulfonmethane (sulfonal) )
Topiramate
Valerian constituents (e.g.,
valerenic acid )
Volatiles /
gases (e.g.,
chloral hydrate ,
chloroform ,
diethyl ether ,
paraldehyde ,
sevoflurane )
Negative modulators:
1,3M1B
3M2B
11-Ketoprogesterone
17-Phenylandrostenol
α3IA
α5IA (LS-193,268)
β-CCB
β-CCE
β-CCM
β-CCP
β-EMGBL
Anabolic steroids
Amiloride
Anisatin
β-Lactams (e.g.,
penicillins ,
cephalosporins ,
carbapenems )
Basmisanil
Bemegride
Bicyclic phosphates (
TBPS ,
TBPO ,
IPTBO )
BIDN
Bilobalide
Bupropion
CHEB
Chlorophenylsilatrane
Cicutoxin
Cloflubicyne
Cyclothiazide
DHEA
DHEA-S
Dieldrin
(+)-DMBB
DMCM
DMPC
EBOB
Etbicyphat
FG-7142 (ZK-31906)
Fiproles (e.g.,
fipronil )
Flavonoids (e.g.,
amentoflavone ,
oroxylin A )
Flumazenil
Fluoroquinolones (e.g.,
ciprofloxacin )
Flurothyl
Furosemide
Golexanolone
Iomazenil (123 I)
IPTBO
Isopregnanolone (sepranolone)
L-655,708
Laudanosine
Lindane
MaxiPost
Morphine
Morphine-3-glucuronide
MRK-016
Naloxone
Naltrexone
Nicardipine
Nonsteroidal antiandrogens (e.g.,
apalutamide ,
bicalutamide ,
enzalutamide ,
flutamide ,
nilutamide )
Oenanthotoxin
Pentylenetetrazol (pentetrazol)
Phenylsilatrane
Picrotoxin (i.e.,
picrotin ,
picrotoxinin and
dihydropicrotoxinin )
Pregnenolone sulfate
Propybicyphat
PWZ-029
Radequinil
Ro 15-4513
Ro 19-4603
RO4882224
RO4938581
Sarmazenil
SCS
Suritozole
TB-21007
TBOB
TBPS
TCS-1105
Terbequinil
TETS
Thujone
U-93631
Zinc
ZK-93426
GABAA -ρ Tooltip γ-Aminobutyric acid A-rho receptor
Metabotropic
GABAB Tooltip γ-Aminobutyric acid B receptor
Alcohols
Barbiturates
Benzodiazepines
Carbamates
Flavonoids
Imidazoles
Kava constituents
Monoureides
Neuroactive steroids
Nonbenzodiazepines
Phenols
Piperidinediones
Pyrazolopyridines
Quinazolinones
Volatiles /
gases Others/unsorted
3-Hydroxybutanal
α-EMTBL
AA-29504
Alogabat
Avermectins (e.g.,
ivermectin )
Bromide compounds (e.g.,
lithium bromide ,
potassium bromide ,
sodium bromide )
Carbamazepine
Chloralose
Chlormezanone
Clomethiazole
Darigabat
DEABL
Deuterated etifoxine
Dihydroergolines (e.g.,
dihydroergocryptine ,
dihydroergosine ,
dihydroergotamine ,
ergoloid (dihydroergotoxine) )
DS2
Efavirenz
Etazepine
Etifoxine
Fenamates (e.g.,
flufenamic acid ,
mefenamic acid ,
niflumic acid ,
tolfenamic acid )
Fluoxetine
Flupirtine
Hopantenic acid
KRM-II-81
Lanthanum
Lavender oil
Lignans (e.g.,
4-O-methylhonokiol ,
honokiol ,
magnolol ,
obovatol )
Loreclezole
Menthyl isovalerate (validolum)
Monastrol
Niacin
Niacinamide
Org 25,435
Phenytoin
Propanidid
Retigabine (ezogabine)
Safranal
Seproxetine
Stiripentol
Sulfonylalkanes (e.g.,
sulfonmethane (sulfonal) ,
tetronal ,
trional )
Terpenoids (e.g.,
borneol )
Topiramate
Valerian constituents (e.g.,
isovaleric acid ,
isovaleramide ,
valerenic acid ,
valerenol )