2. GPCR/G Protein Neuronal Signaling Immunology/Inflammation
  3. Histamine Receptor
  4. Irdabisant

Irdabisant  (Synonyms: CEP-26401)

Cat. No.: HY-109968 Purity: 99.38%
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Irdabisant (CEP-26401) is a selective, orally active and blood-brain barrier (BBB) penetrant histamine H3 receptor (H3R) inverse agonist/inverse agonist with Ki values of 7.2 nM and 2.0 nM for rat H3R and human H3R, respectively. Irdabisant has relatively low inhibitory activity against hERG current with an IC50 of 13.8 μM. Irdabisant has cognition-enhancing and wake-promoting activities in the rat social recognition model. Irdabisant can be used to research schizophrenia or cognitive impairment.

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Irdabisant Chemical Structure

Irdabisant Chemical Structure

CAS No. : 1005402-19-6

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10 mM * 1 mL in DMSO
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Based on 1 publication(s) in Google Scholar

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Irdabisant Related Antibodies

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Description

Irdabisant (CEP-26401) is a selective, orally active and blood-brain barrier (BBB) penetrant histamine H3 receptor (H3R) inverse agonist/inverse agonist with Ki values of 7.2 nM and 2.0 nM for rat H3R and human H3R, respectively. Irdabisant has relatively low inhibitory activity against hERG current with an IC50 of 13.8 μM. Irdabisant has cognition-enhancing and wake-promoting activities in the rat social recognition model. Irdabisant can be used to research schizophrenia or cognitive impairment[1][2].

IC50 & Target[1]

rat H3 receptor

7.2 nM (Ki)

human H3 receptor

2 nM (Ki)

Cellular Effect
Cell Line Type Value Description References
HEK293 IC50
13.8 μM
Compound: 8a, CEP-26401, irdabisant
Inhibition of recombinant human ERG channel expressed in human HEK 293 cells by patch clamp assay
Inhibition of recombinant human ERG channel expressed in human HEK 293 cells by patch clamp assay
[PMID: 21634396]
In Vitro

Irdabisant (CEP-26401, compound 8a) shows antagonist activity with Kb, app values of 1.0 nM and 0.4 nM for rat H3R and human H3R, respectively; shows inverse agonist activity with EC50 values of 2.0 nM and 1.1 nM for rat H3R and human H3R, respectively[1].
Irdabisant has moderate activity at Muscarinic M2 (Ki = 3.7 ± 0.0 μM) and Adrenergic α1A (Ki = 9.8 ± 0.3 μM) receptors, Dopamine transporters (Ki = 11 ± 2 μM), Norepinephrine transporters (Ki = 10 ± 1 μM), and phosphodiesterase PDE3 (IC50 = 15 ± 1 μM)[1].
Irdabisant inhibits the cytochrome P450 enzymes CYP1A2, 2C9, 2C19, 2D6, and 3A4 with IC50 values of greater than 30 μM, indicating less potential for drug-drug interactions[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Irdabisant Related Antibodies
In Vivo

CEP-26401 (0.01-0.3 mg/kg; p.o.; single dosage) dose-dependently inhibits H3R agonist RAMH-induced dipsogenia[1].
CEP-26401 (0.0001-0.1 mg/kg; i.v. or p.o.; single dosage) improves performance in the rat social recognition model of short-term memory[1].
CEP-26401 (3-30 mg/kg; p.o.; single dosage) exhibits wake-promoting activity in rat[2].
CEP-26401 (3-30 mg/kg; i.p.) increases prepulse inhibition (PPI) in DBA/2NCrl mice[2].
CEP-26401 (1 mg/kg for i.v. and 3 mg/kg for p.o.; single dosage) is rapidly absorbed with high oral bioavailability in rat and monkey, and shows a moderate clearance in monkey and dog compared to the rat[1].
Pharmacokinetic Parameters of Irdabisant (compound 8a) in rats, dogs and monkeys[1].

Rat Dog Monkey
i.v. t1/2 (h) 2.6 2.9 5.4
i.v. Vd (L/kg) 9.4 3.5 ± 1.1 3.8 ± 0.9
i.v. CL (mL/min/kg) 42 13.2 ± 1.5 7.7 ± 1.8
p.o. t1/2 (L/kg) 2.9 2.7 5.0
p.o. AUC (ng·h/mL) 984 1190 ± 180 1919 ± 611
p.o. Cmax (ng/mL) 270 230 ± 70 760 ± 74
p.o. F (%) 83 22 ± 2 83 ± 18
Brain to plasma ratio 2.6 ± 0.2 2.4 ± 0.4 /

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Model: Male Sprague-Dawley rats (i.p. 10 mg/kg RAMH-induced dipsogenia model)[1]
Dosage: 0.01-0.3 mg/kg
Administration: p.o.; single dosage
Result: Dose-dependently inhibited H3R agonist RAMH (HY-100999)-induced dipsogenia (which manifests as water drinking) with an EC50 value of 0.06 mg/kg.
Animal Model: Male Sprague-Dawley rats (adult rats were briefly exposed to a juvenile rat for build social recognition model)[2]
Dosage: 0.0001, 0.001, 0.01 and 0.1 mg/kg for i.p.; 0.01 and 0.1 mg/kg for p.o.
Administration: i.v. or p.o.; single dosage
Result: Effectively reduced the ratio of investigation duration (RID) at doses over the range from 0.001 to 0.1 mg/kg i.p. and at 0.01 and 0.1 mg/kg p.o., demonstrating potent enhancement of short-term sensory memory in this model.
Animal Model: Male Sprague-Dawley rats[2]
Dosage: 3, 10 and 30 mg/kg
Administration: p.o.; single dosage
Result: Exhibited robust wake promotion with the treated animals awake 90% of the time up to 3 h postdosing at 30 mg/kg.
Animal Model: Male DBA/2NCrl mice (19-27 g; 7-9 weeks)[2]
Dosage: 3, 10 and 30 mg/kg
Administration: i.p.; single dosage
Result: Increased prepulse inhibition (PPI) in DBA/2NCrl mice, whereas the antipsychotic Risperidone (HY-11018) is effective at 0.3 and 1 mg/kg i.p..
Animal Model: Male Sprague-Dawley rats, male beagle dogs and male cynomolgus monkeys[1]
Dosage: 1 mg/kg for i.v. and 3 mg/kg for p.o.
Administration: i.v. and p.o.
Result: Exhibited rapid absorption with high oral bioavailability in rat and monkey, and showed a moderate clearance in monkey and dog compared to the rat.
Clinical Trial
Molecular Weight

313.39

Formula

C18H23N3O2
CAS No.
Appearance

Solid

Color

Off-white to light yellow

SMILES

C[C@H](CCC1)N1CCCOC2=CC=C(C(C=C3)=NNC3=O)C=C2
Shipping

Room temperature in continental US; may vary elsewhere.
Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 6 months
-20°C 1 month
Solvent & Solubility
In Vitro: 

DMSO : 50 mg/mL (159.55 mM; ultrasonic and warming and heat to 60°C; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 3.1909 mL 15.9546 mL 31.9091 mL
5 mM 0.6382 mL 3.1909 mL 6.3818 mL
View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

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Please enter the basic information of animal experiments:

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Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
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Working solution concentration: mg/mL
Purity & Documentation
References

Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 3.1909 mL 15.9546 mL 31.9091 mL 79.7728 mL
5 mM 0.6382 mL 3.1909 mL 6.3818 mL 15.9546 mL
10 mM 0.3191 mL 1.5955 mL 3.1909 mL 7.9773 mL
15 mM 0.2127 mL 1.0636 mL 2.1273 mL 5.3182 mL
20 mM 0.1595 mL 0.7977 mL 1.5955 mL 3.9886 mL
25 mM 0.1276 mL 0.6382 mL 1.2764 mL 3.1909 mL
30 mM 0.1064 mL 0.5318 mL 1.0636 mL 2.6591 mL
40 mM 0.0798 mL 0.3989 mL 0.7977 mL 1.9943 mL
50 mM 0.0638 mL 0.3191 mL 0.6382 mL 1.5955 mL
60 mM 0.0532 mL 0.2659 mL 0.5318 mL 1.3295 mL
80 mM 0.0399 mL 0.1994 mL 0.3989 mL 0.9972 mL
100 mM 0.0319 mL 0.1595 mL 0.3191 mL 0.7977 mL
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Irdabisant Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

Irdabisant1005402-19-6CEP-26401CEP26401CEP 26401Histamine Receptorblood-brain barrierhERGsocial recognition modelschizophreniaSD ratsDBA/2NCrl micebeagle dogscynomolgus monkeysInhibitorinhibitorinhibit

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