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CGP 71683 hydrochloride

Highly selective and potent non-peptide NPY Y5 receptor antagonist CAS# 192322-50-2

CGP 71683 hydrochloride

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Quality Control of CGP 71683 hydrochloride

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Chemical structure

CGP 71683 hydrochloride

3D structure

Chemical Properties of CGP 71683 hydrochloride

Cas No. 192322-50-2 SDF Download SDF
PubChem ID 9849276 Appearance Powder
Formula C26H30ClN5O2S M.Wt 512.07
Type of Compound N/A Storage Desiccate at -20°C
Solubility DMSO : 160 mg/mL (312.46 mM; Need ultrasonic)
Chemical Name N-[[4-[[(4-aminoquinazolin-2-yl)amino]methyl]cyclohexyl]methyl]naphthalene-1-sulfonamide;hydrochloride
SMILES C1CC(CCC1CNC2=NC3=CC=CC=C3C(=N2)N)CNS(=O)(=O)C4=CC=CC5=CC=CC=C54.Cl
Standard InChIKey DIQDKUNCSVFGHH-UHFFFAOYSA-N
Standard InChI InChI=1S/C26H29N5O2S.ClH/c27-25-22-9-3-4-10-23(22)30-26(31-25)28-16-18-12-14-19(15-13-18)17-29-34(32,33)24-11-5-7-20-6-1-2-8-21(20)24;/h1-11,18-19,29H,12-17H2,(H3,27,28,30,31);1H
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Biological Activity of CGP 71683 hydrochloride

DescriptionExtremely selective, non-peptide NPY Y5 receptor antagonist. Displays > 1000-fold selectivity over Y1, Y2 and Y4 receptors; IC50 values are 1.4, 2765, 7187 and 5637 nM at cloned rat Y5, Y1, Y2 and Y4 receptors respectively. Potently inhibits NPY-induced food intake following i.p. administration in diabetic, free-feeding and fasted rats.

CGP 71683 hydrochloride Dilution Calculator

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CGP 71683 hydrochloride Molarity Calculator

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Preparing Stock Solutions of CGP 71683 hydrochloride

1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 1.9529 mL 9.7643 mL 19.5286 mL 39.0572 mL 48.8215 mL
5 mM 0.3906 mL 1.9529 mL 3.9057 mL 7.8114 mL 9.7643 mL
10 mM 0.1953 mL 0.9764 mL 1.9529 mL 3.9057 mL 4.8821 mL
50 mM 0.0391 mL 0.1953 mL 0.3906 mL 0.7811 mL 0.9764 mL
100 mM 0.0195 mL 0.0976 mL 0.1953 mL 0.3906 mL 0.4882 mL
* Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations.

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References on CGP 71683 hydrochloride

Antinociception produced by systemic R(+)-baclofen hydrochloride is attenuated by CGP 35348 administered to the spinal cord or ventromedial medulla of rats.[Pubmed:8773775]

Brain Res. 1996 Apr 29;718(1-2):129-37.

This study examined the sites in the central nervous system at which subcutaneously-administered R(+)-baclofen hydrochloride (baclofen), the most active isomer of this prototypic gamma-aminobutyric acid (GABA)B receptor agonist, acts to produce antinociception in the rat. To determine whether baclofen acts in the spinal cord, either saline or the GABAB receptor antagonist CGP 35348 was injected intrathecally in rats pretreated 24 min earlier with 1 or 3 mg/kg s.c. baclofen. Intrathecal (i.t.) injection of 3 or 10 micrograms of CGP 35348 antagonized the increase in tail-flick and hot-plate latency produced by either dose of baclofen. To determine whether baclofen acts at sites in the ventromedial medulla (VMM), either saline or CGP 35348 was microinjected in the nucleus raphe magnus or nucleus reticularis gigantocellularis pars alpha of rats pretreated 24 min earlier with 1 or 3 mg/kg s.c. baclofen. Microinjection of 0.5 or 3 micrograms of CGP 35348 at sites in the VMM produced at best only a very modest attenuation of the antinociceptive effects of baclofen. These data suggest that systemically-administered baclofen acts at sites in both the spinal cord and the VMM, but that its antinociceptive effects are likely to be mediated to a greater extent by a spinal, rather than medullary site of action. However, a definitive comparison of the relative contribution of GABAB receptors in these two regions is precluded by differences in the diffusion and concentrations of the antagonist in the spinal cord and brainstem. Finally, microinjection of 0.5 or 3.0 micrograms of CGP 35348 in the nucleus raphe magnus or nucleus reticularis gigantocellularis pars alpha of saline-pretreated rats did not alter tail-flick or hot-plate latency. This finding suggests that, unlike GABAA receptors, GABAB receptors do not mediate the tonic GABAergic input to neurons in these nuclei.

Receptor subtypes Y1 and Y5 mediate neuropeptide Y induced feeding in the guinea-pig.[Pubmed:11959807]

Br J Pharmacol. 2002 Apr;135(8):2029-37.

1. Neuropeptide Y (NPY) is one of the most potent stimulants of food intake. It has been debated which receptor subtype mediates this response. Initially Y(1) was proposed, but later Y(5) was announced as a 'feeding' receptor in rats and mice. Very little is known regarding other mammals. The present study attempts to characterize the role of NPY in feeding behaviour in the distantly related guinea-pig. When infused intracerebroventricularly, NPY dose-dependently increased food intake. 2. PYY, (Leu(31),Pro(34))NPY and NPY(2 - 36) stimulated feeding, whereas NPY(13 - 36) had no effect. These data suggest that either Y(1) or Y(5) receptors or both may mediate NPY induced food intake in guinea-pigs. 3. The Y(1) receptor antagonists, BIBO 3304 and H 409/22 displayed nanomolar affinity for the Y(1) receptor (K(i) values 1.1+/-0.2 nM and 5.6+/-0.9 nM, respectively), but low affinity for the Y(2) or Y(5) receptors. When guinea-pigs were pretreated with BIBO 3304 and H 409/22, the response to NPY was inhibited. 4. The Y(5) antagonist, CGP 71683A had high affinity for the Y(5) receptor (K(i) 1.3+/-0.05 nM) without having any significant activities at the Y(1) and Y(2) receptors. When CGP 71683A was infused into brain ventricles, the feeding response to NPY was attenuated. 5. The present study shows that NPY stimulates feeding in guinea-pigs through Y(1) and Y(5) receptors. As the guinea-pig is very distantly related to the rat and mouse, this suggests that both Y(1) and Y(5) receptors may mediate NPY-induced hyperphagia also in other orders of mammals.

Potent and selective tools to investigate neuropeptide Y receptors in the central and peripheral nervous systems: BIB03304 (Y1) and CGP71683A (Y5).[Pubmed:10737674]

Can J Physiol Pharmacol. 2000 Feb;78(2):116-25.

We have evaluated 3 newly developed neuropeptide Y receptor antagonists in various in vitro binding and bioassays: BIBO3304 (Y1), T4[NPY33-36]4 (Y2), and CGP71683A (Y5). In rat brain homogenates, BIBO3304 competes for the same population of [125I][Leu31,Pro34] peptide YY (PYY) binding sites (75%) as BIBP3226, but with a 10 fold greater affinity (IC50 of 0.2 +/- 0.04 nM for BIBO3304 vs. 2.4 +/- 0.07 nM for BIBP3226),while CGP71683A has high affinity for 25% of specific [125I][Leu31,Pro34]PYY binding sites. Both BIBO3304 and CGP71683A (at 1.0 microM) were unable to compete for a significant proportion of specific [125I]PYY3-36/Y2 sites. The purported Y2 antagonist T4[NPY33-36]4 competed against [125I]PYY3-36 binding sites with an affinity of 750 nM. These results were confirmed in HEK 293 cells transfected with either the rat Y1, Y2, Y4, or Y5 receptor cDNA. BIBO3304, but not CGP71683A, competed with high affinity for [125I][Leu31,Pro34]PYY binding sites in HEK 293 cells transfected with the rat Y1 receptor cDNA, whereas the reverse profile was observed upon transfection with the rat Y5 receptor cDNA. Additionally, both molecules were inactive at Y2 and Y4 receptor subtypes expressed in HEK 293 cells. Receptor autoradiographic studies revealed the presence of [125I][Leu31,Pro34]PYY/BIBO3304-insensitive sites in the rat brain as reported previously for BIBP3226. Finally, the selective antagonistic properties of BIBO3304 were demonstrated in a Y1 bioassay (rabbit saphenous vein; pA2 value of 9.04) while being inactive in Y2 (rat vas deferens) and Y4 (rat colon) bioassays. These results confirm the high affinity and selectivity of BIBO3304 and CGP71683A for the Y1 and Y5 receptor subtypes, respectively, while the purported Y2 antagonist, T4[NPY33-36]4 possesses rather low affinity for this receptor.

Food intake in free-feeding and energy-deprived lean rats is mediated by the neuropeptide Y5 receptor.[Pubmed:9854049]

J Clin Invest. 1998 Dec 15;102(12):2136-45.

The new neuropeptide Y (NPY) Y5 receptor antagonist CGP 71683A displayed high affinity for the cloned rat NPY Y5 subtype, but > 1, 000-fold lower affinity for the cloned rat NPY Y1, Y2, and Y4 subtypes. In LMTK cells transfected with the human NPY Y5 receptor, CGP 71683A was without intrinsic activity and antagonized NPY-induced Ca2+ transients. CGP 71683A was given intraperitoneally (dose range 1-100 mg/kg) to a series of animal models of high hypothalamic NPY levels. In lean satiated rats CGP 71683A significantly antagonized the increase in food intake induced by intracerebroventricular injection of NPY. In 24-h fasted and streptozotocin diabetic rats CGP 71683A dose-dependently inhibited food intake. During the dark phase, CGP 71683A dose-dependently inhibited food intake in free-feeding lean rats without affecting the normal pattern of food intake or inducing taste aversion. In free-feeding lean rats, intraperitoneal administration of CGP 71683A for 28 d inhibited food intake dose-dependently with a maximum reduction observed on days 3 and 4. Despite the return of food intake to control levels, body weight and the peripheral fat mass remained significantly reduced. The data demonstrate that the NPY Y5 receptor subtype plays a role in NPY-induced food intake, but also suggest that, with chronic blockade, counterregulatory mechanisms are induced to restore appetite.

Description

CGP71683 hydrochloride is a competitive neuropeptide Y5 receptor antagonist with a Ki of 1.3 nM, and shows no obvious activity at Y1 receptor (Ki, >4000 nM) and Y2 receptor (Ki, 200 nM) in cell membranes.

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