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MGluR5 inhibitor

Product Name
MGluR5 inhibitor
CAS No.
871362-31-1
Chemical Name
MGluR5 inhibitor
Synonyms
CTEP;CS-1999;RO4956371;CTEP (RO4956371);MGluR5 inhibitor;CTEP, 10 mM in DMSO;MGluR5 inhibitor(CTEP);MGluR5 inhibitor USP/EP/BP;Metabotropic glutamate receptors,CTEP,RO4956371,inhibit,mGluR,Inhibitor,RO-4956371;2-chloro-4-[2-[2,5-dimethyl-1-[4-(trifluoromethoxy)phenyl]imidazol-4-yl]ethynyl]pyridine
CBNumber
CB72645136
Molecular Formula
C19H13ClF3N3O
Formula Weight
391.77
MOL File
871362-31-1.mol
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MGluR5 inhibitor Property

Boiling point:
523.0±60.0 °C(Predicted)
Density 
1.30±0.1 g/cm3(Predicted)
storage temp. 
2-8°C
solubility 
insoluble in EtOH; insoluble in H2O; ≥19.6 mg/mL in DMSO
form 
powder
pka
5.01±0.70(Predicted)
color 
white to beige
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H320Causes eye irritation

H335May cause respiratory irritation

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P330Rinse mouth.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
SML2306
Product name
CTEP
Purity
≥98% (HPLC)
Packaging
5mg
Price
$159
Updated
2025/07/31
Sigma-Aldrich
Product number
SML2306
Product name
CTEP
Purity
≥98% (HPLC)
Packaging
25mg
Price
$462
Updated
2025/07/31
Cayman Chemical
Product number
28773
Product name
CTEP
Packaging
5mg
Price
$121
Updated
2024/03/01
Cayman Chemical
Product number
28773
Product name
CTEP
Packaging
50mg
Price
$961
Updated
2024/03/01
Cayman Chemical
Product number
28773
Product name
CTEP
Packaging
10mg
Price
$230
Updated
2024/03/01
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MGluR5 inhibitor Chemical Properties,Usage,Production

Uses

CTEP (RO 4956371) is a novel, long-acting, orally bioavailable allosteric antagonist of mGlu5 receptor with IC50 of 2.2 nM, and shows > 1000-fold selectivity over other mGlu receptors. CTEP is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.

Biological Activity

ctep is a potent, long-acting, and orally bioavailable inhibitor of metabotropic glutamate receptor 5 (mglu5) with ic50 value of 11.4nm [1].ctep is a negative allosteric modulator of mglu5 and has inverse agonist activity. in the in vitro binding assay, ctep binds to human, mouse and rat mglu5 with kd values of 1.7nm, 1.8nm and 1.5 nm, respectively. in hek293 cells expressing mglu5, ctep inhibits quisqualate-induced ca2+ mobilization and inositol phosphate accumulation with ic50 value of 11.4nm and 6.4nm, respectively. in addition, it shows an ic50 value of 40.1nm in the ip accumulation assay, demonstrating its inverse agonist activity. ctep is proved to be a highly selective inhibitor of mglu5. it shows no significant activity against mglu1, mglu2, mglu3, mglu4, mglu6, mglu7 or mglu8 at concentration up to 10μm [1].in the in vivo vogel conflict drinking test, ctep markedly increases drinking time at doses of 0.3mg/kg. in adult c57bl/6 mice brain, ctep displaces the mglu5 antagonist abp688 in the regions expressing mglu5 by 50% at dose of 77.5 ng/g [1].

Biochem/physiol Actions

CTEP is a high-affinity, orally active, potent and selective metabotropic glutamate receptor 5 (mGlu5 or mGluR5) negative allosteric modulator (NAM) and inverse agonist (human/mouse/rat mGlu5 Kd = 1.7/1.8/1.5 nM; IC50 against quisqualate stimulation = 6.4/16.8/8/8 by IP accumulation or 11.4/42/4/6.9 by Ca2+ mobilization using human/mouse/rat mGlu5 HEK293 transfectants; IC50 = 40.1 nM against constitutive IP level in human mGlu5 HEK293) with >1000-fold selectivity over 103 molecular targets, including all known mGluRs. CTEP is an excellent tool compound for long-term in vivo studies (in mice and rats) with good pharmacokinetic properties (B/P ratio = 2.6, oral bioavailability ~100%, T1/2 ~18 hrs post 4.5 mg/kg p.o. in mice) and reported to display 30- to 100-fold higher in vivo potency than MPEP and fenobam in two rodent behavioral models sensitive to antianxiety drugs.

in vivo

CTEP (RO 4956371) is significantly active at doses of 0.1 mg/kg and 0.3 mg/kg in treatment of anxiety in mouse. CTEP (RO 4956371) 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 (RO 4956371) (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 (RO 4956371) 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 (RO 4956371) brain exposure of 240 ng/g. CTEP (RO 4956371) 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 (RO 4956371) (2 mg/kg, p.o. bid) achieves uninterrupted mGlu5 occupancy per 48 hours in mice. CTEP (RO 4956371) (2 mg/kg, p.o.) treatment corrects elevated hippocampal long-term depression, excessive protein synthesis, and audiogenic seizures in the Fmr1 knockout mouse[2].

target

mGlu5 receptor

IC 50

mGlu5 Receptor: 2.2 nM (IC50)

References

[1] lindemann l, jaeschke g, michalon a, et al. ctep: a novel, potent, long-acting, and orally bioavailable metabotropic glutamate receptor 5 inhibitor. journal of pharmacology and experimental therapeutics, 2011, 339(2): 474-486.

MGluR5 inhibitor Preparation Products And Raw materials

Raw materials

Preparation Products

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  • CTEP
  • MGluR5 inhibitor
  • CTEP (RO4956371)
  • Pyridine, 2-chloro-4-[2-[2,5-dimethyl-1-[4-(trifluoromethoxy)phenyl]-1H-imidazol-4-yl]ethynyl]-
  • RO4956371
  • MGluR5 inhibitor(CTEP)
  • CS-1999
  • 2-chloro-4-[2-[2,5-dimethyl-1-[4-(trifluoromethoxy)phenyl]imidazol-4-yl]ethynyl]pyridine
  • MGluR5 inhibitor USP/EP/BP
  • Metabotropic glutamate receptors,CTEP,RO4956371,inhibit,mGluR,Inhibitor,RO-4956371
  • CTEP, 10 mM in DMSO
  • 871362-31-1
  • C19H13ClF3N3O
  • Inhibitors