Home Neuronal Signaling GluR antagonist CTEP (RO4956371) For research use only.

CTEP (RO4956371)

CTEP (RO4956371) is a novel, long-acting, orally bioavailable allosteric antagonist of mGlu5 receptor with IC50 of 2.2 nM, shows >1000-fold selectivity over other mGlu receptors.

CTEP (RO4956371) Chemical Structure

CTEP (RO4956371) Chemical Structure

CAS No. 871362-31-1

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CTEP (RO4956371) Related Products

Signaling Pathway

GluR Signaling Pathways

GluR Signaling Pathway

Biological Activity

Description CTEP (RO4956371) is a novel, long-acting, orally bioavailable allosteric antagonist of mGlu5 receptor with IC50 of 2.2 nM, shows >1000-fold selectivity over other mGlu receptors.
Targets
mGlu5 [1]
2.2 nM
In vitro
In vitro CTEP inhibits quisqualate-induced Ca2+ mobilization with an IC50 of 11.4 nM and [3H]IP accumulation with an IC50 of 6.4 nM in HEK293 cells stably expressing human mGlu5. CTEP inhibits the constitutive activity of human mGlu5 by approximately 50% with an IC50 of 40.1 nM in HEK293 cells stably expressing human mGlu5. [1]
In Vivo
In vivo CTEP is significantly active at doses of 0.1 mg/kg and 0.3 mg/kg in treatment of anxiety in mouse. CTEP significantly increases drinking time at doses of 0.3 mg/kg and 1.0 mg/kg in the Vogel conflict drinking test in rat, whereas it has no effect at lower doses. The half-life of CTEP (oral) is 18 h, and the B/P ratio based on total drug concentrations in plasma and whole brain homogenates is 2.6 in mice. After single oral doses of 4.5 and 8.7 mg/kg CTEP formulated as microsuspension in a saline/Tween vehicle administrated to adult C57BL/6 mice is rapidly absorbed and achieves close to maximal exposure after approximately 30 min. Chronic administration in adult mice with a dose of 2 mg/kg p.o. every 48 h for 2 months reaches a minimal CTEP brain exposure of 240 ng/g. CTEP fully displaces [3H]ABP688 in mouse brain regions known to express mGlu5, and 50% displacement is achieved with doses producing an average compound concentration of 77.5 ng/g measured in whole brain homogenate. [1] CTEP (2 mg/kg p.o. bid) achieves uninterrupted mGlu5 occupancy per 48 hours in mice. CTEP (2 mg/kg p.o.) treatment corrects elevated hippocampal long-term depression, excessive protein synthesis, and audiogenic seizures in the Fmr1 knockout mouse. [2]
Animal Research Animal Models Male Sprague-Dawley rats
Dosages 1.0 mg/kg
Administration orally
NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT05915208 Recruiting
Histiocytosis|Langerhans Cell Histiocytosis|Erdheim-Chester Disease|Rosai Dorfman Disease|Xanthogranuloma|Malignant Histiocytoses
University of Alabama at Birmingham
 September 1 2022 --
NCT02424916 Completed
Metastatic Melanoma
Nantes University Hospital|UMR892
 May 26 2015 Phase 1|Phase 2

Chemical Information & Solubility

Molecular Weight 391.77 Formula

C19H13ClF3N3O
CAS No. 871362-31-1 SDF Download CTEP (RO4956371) SDF
Smiles CC1=C(N=C(N1C2=CC=C(C=C2)OC(F)(F)F)C)C#CC3=CC(=NC=C3)Cl
Storage (From the date of receipt)

In vitro
Batch:

DMSO : 78 mg/mL ( (199.09 mM) Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Ethanol : 10 mg/mL

Water : Insoluble


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In vivo
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Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )

Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
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Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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Frequently Asked Questions

Question 1:
Do you have advice for CTEP administration in mouse via injection?

Answer:
The IP formula for S2861 CTEP is 2% DMSO+40% PEG300+2% Tween-80 +H2O.

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