Misplaced Pages

Iomazenil

Clinical data
Other names	Ro 16-0154
Identifiers
IUPAC name ethyl 7-iodanyl-5-methyl-6-oxo-4H-imidazobenzodiazepine-3-carboxylate
CAS Number	127985-21-1 127396-36-5 (I)
PubChem CID	65959
ChemSpider	59362
UNII	7DVX185FLQ I: B851121553
ChEMBL	ChEMBL2105020
CompTox Dashboard (EPA)	DTXSID00155549
Chemical and physical data
Formula	C15H14IN3O3
Molar mass	407.290 g/mol
3D model (JSmol)	Interactive image
SMILES CCOC(=O)c1c2n(cn1)-c3cccc(c3C(=O)N(C2)C)I
InChI InChI=1S/C15H14IN3O3/c1-3-22-15(21)13-11-7-18(2)14(20)12-9(16)5-4-6-10(12)19(11)8-17-13/h4-6,8H,3,7H2,1-2H3/i16-4 Key:FRIZVHMAECRUBR-KIWWSDKQSA-N

Iomazenil (also known as Ro16-0154, INN, USAN; benzodine) is an antagonist and partial inverse agonist of benzodiazepine and a potential treatment for alcohol use disorder. The compound was introduced in 1989 by pharmaceutical company Hoffmann-La Roche as an Iodine-123-labelled SPECT tracer for imaging benzodiazepine receptors (GABA_A receptors) in the brain. Iomazenil is an analogue of flumazenil (Ro15-1788).

Use in brain research

I-labelled iomazenil can be used to image epileptic seizure foci as an alternative to F-fludeoxyglucose PET imaging.

The effect of iomazenil of reducing levels of GABA in the brain was used by researchers to exacerbate symptoms in patients with schizophrenia in a laboratory study, supporting the theory that a GABA deficiency underlies that disease.

Alcohol treatment

Researchers at Yale University and Veterans Affairs Connecticut Healthcare System have been testing iomazenil as a potential treatment for drunkenness due to its ability to bind alcohol receptors in the brain.

See also

• GABA_A receptor negative allosteric modulator
• GABA_A receptor § Ligands

References

1. Höll K, Deisenhammer E, Dauth J, Carmann H, Schubiger PA (1989). "Imaging benzodiazepine receptors in the human brain by single photon emission computed tomography (SPECT)". International Journal of Radiation Applications and Instrumentation. Part B, Nuclear Medicine and Biology. 16 (8): 759–63. doi:10.1016/0883-2897(89)90158-x. PMID 2559905.
2. Kung HF, Kung MP, Choi SR (January 2003). "Radiopharmaceuticals for single-photon emission computed tomography brain imaging". Seminars in Nuclear Medicine. 33 (1): 2–13. doi:10.1053/snuc.2003.127296. PMID 12605353.
3. Goethals I, Van de Wiele C, Boon P, Dierckx R (February 2003). "Is central benzodiazepine receptor imaging useful for the identification of epileptogenic foci in localization-related epilepsies?". European Journal of Nuclear Medicine and Molecular Imaging. 30 (2): 325–8. doi:10.1007/s00259-002-1083-z. PMID 12552355. S2CID 27969321.
4. Ahn K, Gil R, Seibyl J, Sewell RA, D'Souza DC (February 2011). "Probing GABA receptor function in schizophrenia with iomazenil". Neuropsychopharmacology. 36 (3). Nature Publishing Group: 677–83. doi:10.1038/npp.2010.198. PMC 3055690. PMID 21068719.
5. Dobson R, Owen J (13 May 2012). "Tests begin on new drink-busting drug". Independent on Sunday. Retrieved 20 May 2012.

External links

• The MICAD Research Team (2004). [123I]Iomazenil. US National Center for Biotechnology Information (NCBI). PMID 20641688. {{cite book}}: |work= ignored (help)
• Clinical trial number NCT00982982 for "Effects of Delta-9-THC and Iomazenil in Healthy Humans" at ClinicalTrials.gov
• Clinical trial number NCT01590277 for "Ability of Partial Inverse Agonist, Iomazenil, to Block Ethanol Effects in Humans" at ClinicalTrials.gov

• Alcohol and health
• Carboxylate esters
• Ethyl esters
• Convulsants
• GABAA receptor negative allosteric modulators
• Imidazobenzodiazepines
• Iodobenzene derivatives