GB83 is a novel, potent and selective antagonist of human protease activated receptor 2 (PAR2) with IC50 of 2µM. Itreversibly inhibits PAR2 activation by both proteases and other PAR2 agonists
Physicochemical Properties
| Molecular Formula | C32H44N4O4 |
| Molecular Weight | 548.71616 |
| Exact Mass | 548.336 |
| CAS # | 1252806-86-2 |
| PubChem CID | 49788574 |
| Appearance | White to off-white solid powder |
| LogP | 5.95 |
| Hydrogen Bond Donor Count | 2 |
| Hydrogen Bond Acceptor Count | 5 |
| Rotatable Bond Count | 9 |
| Heavy Atom Count | 40 |
| Complexity | 882 |
| Defined Atom Stereocenter Count | 3 |
| SMILES | CCC(C)C(C(=O)N1CCC2(CCC3=CC=CC=C32)CC1)NC(=O)C(CC4CCCCC4)NC(=O)C5=CC=NO5 |
| InChi Key | ZXMXAOYWSLZLQM-MCOVPRHSSA-N |
| InChi Code | InChI=1S/C32H44N4O4/c1-3-22(2)28(31(39)36-19-16-32(17-20-36)15-13-24-11-7-8-12-25(24)32)35-29(37)26(21-23-9-5-4-6-10-23)34-30(38)27-14-18-33-40-27/h7-8,11-12,14,18,22-23,26,28H,3-6,9-10,13,15-17,19-21H2,1-2H3,(H,34,38)(H,35,37)/t22-,26-,28-/m0/s1 |
| Chemical Name | N-((S)-3-Cyclohexyl-1-((2S,3S)-1-(2,3-dihydrospiro[indene-1,4'-piperidine]-1'-yl)-3-methyl-1-oxopentan-2-ylamino)-1-oxopropan-2-yl)isoxazole-5-carboxamide |
| Synonyms | GB83 GB 83 GB-83 |
| HS Tariff Code | 2934.99.9001 |
| Storage |
Powder-20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month |
| Shipping Condition | Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs) |
Biological Activity
| ln Vitro | Nodose ganglion (NG) neurons are not affected by the supernatant of MET-1 (Microbial Ecosystem Therapeutic Agent-1) when GB83 (10 µM) is present [2]. |
| ln Vivo | In PAR2 KO mice, GB83 (5 µg; i.p.) reverses the discomfort and synovitis caused by neutrophil elastase [1]. |
| Animal Protocol |
Animal/Disease Models: 8-14 weeks, 20-30 g male C57Bl/6 mice (PAR2 KO mice) [1] Doses: 5 µg Route of Administration: intraperitoneal (ip) injection; 10 minutes before neutrophil elastase administration And three times each at 110 and 230 minutes after administration. Experimental Results: Dramatically blocked the neutrophil elastase-induced increase in vascular perfusion and the number of rolling adherent leukocytes, and also Dramatically attenuated hindpaw allodynia. |
| References |
[1]. Neutrophil elastase induces inflammation and pain in mouse knee joints via activation of proteinase-activated receptor-2. Br J Pharmacol. 2016 Feb;173(4):766-77. [2]. Protease-dependent excitation of nodose ganglion neurons by commensal gut bacteria. J Physiol. 2020 Jun;598(11):2137-2151. |
Solubility Data
| Solubility (In Vitro) | May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples |
| Solubility (In Vivo) |
Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples. Injection Formulations (e.g. IP/IV/IM/SC) Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline) *Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution. Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil) Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals). Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)] *Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline) Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline) Injection Formulation 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline) Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil) Injection Formulation 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Oral Formulations Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium) Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals). Oral Formulation 3: Dissolved in PEG400 Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose Oral Formulation 6: Mixing with food powders Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently. (Please use freshly prepared in vivo formulations for optimal results.) |
| Preparing Stock Solutions | 1 mg | 5 mg | 10 mg | |
| 1 mM | 1.8224 mL | 9.1121 mL | 18.2242 mL | |
| 5 mM | 0.3645 mL | 1.8224 mL | 3.6448 mL | |
| 10 mM | 0.1822 mL | 0.9112 mL | 1.8224 mL |