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Sigma-Aldrich

mGluR5 Antagonist, MTEP

The mGluR5 Antagonist, MTEP, also referenced under CAS 329205-68-7, controls the biological activity of mGluR5. This small molecule/inhibitor is primarily used for Neuroscience applications.

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Synonym(s):
mGluR5 Antagonist, MTEP, 3-((2-Methyl-1,3-thiazol-4-yl)ethynyl)pyridine
Empirical Formula (Hill Notation):
C11H8N2S
CAS Number:
329205-68-7
Molecular Weight:
200.26

Quality Level

100

Assay

≥98% (HPLC)

form

solid

manufacturer/tradename

Calbiochem®

storage condition

OK to freeze
protect from light

color

white to yellow

solubility

methanol: 1 mg/mL
DMSO: 5 mg/mL

shipped in

ambient

storage temp.

2-8°C

InChI

1S/C11H8N2S/c1-9-13-11(8-14-9)5-4-10-3-2-6-12-7-10/h2-3,6-8H,1H3

InChI key

NRBNGHCYDWUVLC-UHFFFAOYSA-N

General description

A brain-permeable (thiazole-pyridine)alkyne compound that acts as a potent, selective and non-competitive mGluR5 (metabotropic glutamate receptor subtype-5) antagonist (IC50 = 5 nM in Ca2+-flux assay; Ki = 16 nM) with in vivo anxiolytic activity in a rodent model (ED50 = 1 mg/kg, ip and 7 mg/kg, po). Devoid of any side effects seen with MPEP and benzodiazepines. Reported to weakly affect the activities of other enzymes and receptors tested (IC50 = 30 µM for MAO-A, >100 µM for mGlu1R, 2R & 7R, and >300 µM for NR2BR).

Biochem/physiol Actions

Cell permeable: yes
Primary Target
mGluR5
Product does not compete with ATP.
Reversible: no
Target IC50: 5 nM in Ca2+-flux assay
Target Ki: 16 nM for mGluR5 (metabotropic glutamate receptor subtype-5)

Packaging

Packaged under inert gas

Warning

Toxicity: Standard Handling (A)

Reconstitution

Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 6 months at -20°C.

Other Notes

Bradbury, M.J., et al. 2005. J. Pharmacol. Exp. Ther.313, 395.
Busse, C.S., et al. 2004. Neuropsychopharmacology29, 1971.
Roppe, J.R., et al. 2004. Bioorg. Med. Chem. Lett.14, 3993.
Klodzinska, A., et al. 2004. Neuropharmacology47, 342.
Cosford, N.D.P., et al. 2003. J. Med. Chem.46, 204.
Brodkin, J., et al. 2002. Eur. J. Neurosci.16, 2241.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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J Brodkin et al.
The European journal of neuroscience, 16(11), 2241-2244 (2002-12-11)
It hs been suggested that metabotropic glutamate receptor subtype 5 (mGluR5) play a role in the expression of anxiety, based on anxiolytic-like effects of the selective mGluR5 antagonist MPEP (2-methyl-6-(phenylethynyl)pyridine) in rodent models of anxiety, including stress-induced hyperthermia (SIH). To
Chris S Busse et al.
Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology, 29(11), 1971-1979 (2004-08-12)
Previous reports have demonstrated the anxiolytic effect of the potent and systemically active metabotropic glutamate subtype 5 (mGlu5) receptor antagonist 2-methyl-6-(phenylethynyl)pyridine (MPEP) in rodents. Here, we present evidence for the anxiolytic activity of a novel mGlu5 receptor antagonist, 3-[(2-methyl-1,3-thiazol-4-yl)ethynyl]pyridine (MTEP)
Jeffrey R Roppe et al.
Bioorganic & medicinal chemistry letters, 14(15), 3993-3996 (2004-07-01)
Structure-activity relationship studies leading to the discovery of a new, orally active mGlu5 receptor antagonist are described. The title compound, 5-[(2-methyl-1,3-thiazol-4-yl)ethynyl]-2,3'-bipyridine, is highly potent in vitro, has good in vivo receptor occupancy, and is efficacious in the rat fear-potentiated startle
Margaret J Bradbury et al.
The Journal of pharmacology and experimental therapeutics, 313(1), 395-402 (2004-12-14)
The metabotropic glutamate receptor subtype mGlu5 modulates central reward pathways. Many transmitter systems within reward pathways affect feeding. We examined the potential role of mGlu5 in body weight regulation using genetic and pharmacological approaches. Adult mice lacking mGlu5, mGluR5-/-, weighed
Nicholas D P Cosford et al.
Journal of medicinal chemistry, 46(2), 204-206 (2003-01-10)
2-Methyl-6-(phenylethynyl)pyridine (3), a potent noncompetitive mGlu5 receptor antagonist widely used to characterize the pharmacology of mGlu5 receptors, suffers from a number of shortcomings as a therapeutic agent, including off-target activity and poor aqueous solubility. Seeking to improve the properties of
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