SR9009 (SR-9009; Stenabolic) is a novel and potent synthetic REV-ERBα/β agonist with the potential to be used for sleep disorders. It activates REV-ERBα and REV-ERBβ with IC50 values of 670 nM and 800 nM, respectively. Synchronizing rhythms of behaviour and metabolic processes is important for cardiovascular health and preventing metabolic diseases. The nuclear receptors REV-ERB-α and REV-ERB-β have an integral role in regulating the expression of core clock proteins driving rhythms in activity and metabolism. Administration of synthetic REV-ERB ligands alters circadian behaviour and the circadian pattern of core clock gene expression in the hypothalami of mice. The circadian pattern of expression of an array of metabolic genes in the liver, skeletal muscle and adipose tissue was also altered, resulting in increased energy expenditure. Treatment of diet-induced obese mice with a REV-ERB agonist decreased obesity by reducing fat mass and markedly improving dyslipidaemia and hyperglycaemia. These results indicate that synthetic REV-ERB ligands that pharmacologically target the circadian rhythm may be beneficial in the treatment of sleep disorders as well as metabolic diseases.

Physicochemical Properties

Molecular Formula	C20H24CLN3O4S
Molecular Weight	437.94
Exact Mass	437.118
CAS #	1379686-30-2
Related CAS #	1379686-30-2
PubChem CID	57394020
Appearance	White to off-white solid powder
Density	1.3±0.1 g/cm3
Boiling Point	547.2±45.0 °C at 760 mmHg
Flash Point	284.7±28.7 °C
Vapour Pressure	0.0±1.5 mmHg at 25°C
Index of Refraction	1.608
LogP	4.17
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	6
Rotatable Bond Count	8
Heavy Atom Count	29
Complexity	556
Defined Atom Stereocenter Count	0
InChi Key	MMJJNHOIVCGAAP-UHFFFAOYSA-N
InChi Code	InChI=1S/C20H24ClN3O4S/c1-2-28-20(25)23-10-9-16(13-23)12-22(11-15-3-5-17(21)6-4-15)14-18-7-8-19(29-18)24(26)27/h3-8,16H,2,9-14H2,1H3
Chemical Name	Ethyl 3-[[(4-chlorophenyl)methyl-[(5-nitrothiophen-2-yl)methyl]amino]methyl]pyrrolidine-1-carboxylate
Synonyms	SR-9009; SR 9009; ethyl 3-[[(4-chlorophenyl)methyl-[(5-nitrothiophen-2-yl)methyl]amino]methyl]pyrrolidine-1-carboxylate; Stenabolic (SR9009); X5DCA09N30; CHEMBL1961796; SR9009; Stenabolic
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

Targets	IC50: 670 nM (Rev-ErbBα); 800 nM (Rev-ErbBβ)[1]
ln Vitro	In a dose-dependent manner, SR9009 promotes the production of the Gal4-responsive luciferase reporter gene and the chimeric Gal4 DNA binding domain (DBD)-REV-ERB ligand binding domain (LBD) α or β (SR9009: REV-ERBα IC50=670 nM, REV-ERBβ IC50=800 nM). In co-transfection tests with full-length REV-ERBα and a luciferase reporter powered by the Bmal1 promoter, SR9009 potently suppresses transcription (IC50=710 nM). In HepG2 cells, SR9009 inhibits BMAL1 mRNA expression in a way that is dependent on REV-ERBα/β. Circular dichroism analysis (Kd=800 nM) was also used to confirm direct binding of SR9009 to REV-ERBα [1].
ln Vivo	Mice given SR9009 (100 mg/kg, ip) had a more marked decrease in body weight. In addition, plasma glucose (19%) and non-esterified fatty acids (NEFA) were decreased by 23% in rats treated with SR9009. Triglyceride (TG) synthesis-related genes were shown to express less in white adipose tissue (WAT) after treatment with SR9009; this effect was also noted in lean mice [1].
Enzyme Assay	In this study, researchers developed two REV-ERBα/β agonists with sufficient plasma/brain exposure to allow evaluation of their effects in vivo. Both SR9009 and SR9009 (Fig. 1a, Supplementary Fig. 1) dose-dependently increased the REV-ERB-dependent repressor activity assessed in HEK293 cells expressing a chimeric Gal4 DNA Binding Domain (DBD) - REV-ERB ligand binding domain (LBD) α or β and a Gal4-responsive luciferase reporter (Fig. 1b) (SR9009: REV-ERBα IC50=670 nM, REV-ERBβ IC50=800 nM; SR9011: REV-ERBα IC50=790 nM, REV-ERBβ IC50=560 nM). The REV-ERB ligand GSK4112 (Supplementary Fig. 2), which exhibits no plasma exposure displays limited activity (Fig. 1b). Both SR9011 and SR9009 potently and efficaciously suppressed transcription in a cotransfection assay using full-length REV-ERBα along with a luciferase reporter driven by the Bmal1 promoter (Fig. 1c) (SR9009 IC50=710 nM; SR9011 IC50=620 nM). SR9011 and SR9009 suppressed the expression of BMAL1 mRNA in HepG2 cells in a REV-ERBα/β-dependent manner (Supplementary Fig. 3). Consistent with both compounds functioning as direct agonists of REV-ERB, we noted that the compounds increased the recruitment of the CoRNR box peptide fragment of NCoR using a biochemical assay (Supplementary Fig. 4). Direct binding of the SR9009 to REV-ERBα was also confirmed using circular dichrosim analysis (Supplementary Fig. 5) (Kd=800 nM). Neither compound exhibited activity at other nuclear receptors12,13 (Supplementary Fig. 6)[1].
Cell Assay	HEK293 cells are grown in 96-well plates (1×106/well) and are transiently transfected using Lipofectamine. Cells are transfected with a total of 200 ng of DNA per well consisting of the pGL4 mIL-17 firefly luciferase reporter construct, the pGL4 mIL-17 + CNS-5 firefly luciferase reporter construct, or the pGL4 mIL-17 2kB RORE mutant (100 ng/well) , an actin promoter Renilla reniformis luciferase reporter (50 ng/well), and either control vector alone or the test DNA (full-length RORα or full-length RORγ at 50 ng/well). All 48 human nuclear receptors are represented in the specificity assay and SR9009 is tested at a concentration of 20 μM. The format of the assay is a cotransfection assay with Gal4 DNA binding domain-nuclear receptor fusions in HEK293 cells[1].
Animal Protocol	For circadian gene expression experiments male C57BL6 mice (8–10 weeks of age) were either maintained on a L:D (12h:12h) cycle or on constant darkness. At circadian time (CT) 0 animals were administered a single dose of 100 mg/kg SR9009 or SR9011 (i.p.) and groups of animals (n=6) were sacrificed at CT0, CT6, CT12 and CT18. Gene expression was determined by real time QPCR.[1]
References	[1]. Regulation of circadian behaviour and metabolism by synthetic REV-ERB agonists. Nature. 2012 Mar 29;485(7396):62-68.
Additional Infomation	SR-9009 is a REV-ERB agonist. SR-9011 has been demonstrated that it is specifically lethal to cancer cells and oncogene-induced senescent cells, including melanocytic naevi, and has no effect on the viability of normal cells or tissues. Synchronizing rhythms of behaviour and metabolic processes is important for cardiovascular health and preventing metabolic diseases. The nuclear receptors REV-ERB-α and REV-ERB-β have an integral role in regulating the expression of core clock proteins driving rhythms in activity and metabolism. Here we describe the identification of potent synthetic REV-ERB agonists with in vivo activity. Administration of synthetic REV-ERB ligands alters circadian behaviour and the circadian pattern of core clock gene expression in the hypothalami of mice. The circadian pattern of expression of an array of metabolic genes in the liver, skeletal muscle and adipose tissue was also altered, resulting in increased energy expenditure. Treatment of diet-induced obese mice with a REV-ERB agonist decreased obesity by reducing fat mass and markedly improving dyslipidaemia and hyperglycaemia. These results indicate that synthetic REV-ERB ligands that pharmacologically target the circadian rhythm may be beneficial in the treatment of sleep disorders as well as metabolic diseases.[1]

Solubility Data

Solubility (In Vitro)

DMSO:≥ 30mg/mL Water:N/A Ethanol:N/A

Solubility (In Vivo)

Solubility in Formulation 1: 20 mg/mL (45.67 mM) in 5% DMSO 10% Cremophor EL + 85% ddH2O (add these co-solvents sequentially from left to right, and one by one), suspension solution; with sonication. Solubility in Formulation 2: 2.5 mg/mL (5.71 mM) in 5% DMSO + 40% PEG300 + 5% Tween80 + 50% Saline (add these co-solvents sequentially from left to right, and one by one), suspension solution; with ultrasonication. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 3: 2.5 mg/mL (5.71 mM) in 5% DMSO + 95% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), suspension solution; with ultrasonication. 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. Solubility in Formulation 4: 2.08 mg/mL (4.75 mM) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), suspension solution; with ultrasonication. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 20.8 mg/mL clear DMSO stock solution to 400 μL of PEG300 and mix evenly; then add 50 μL of Tween-80 to the above solution and mix evenly; then add 450 μL of normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 5: 2.08 mg/mL (4.75 mM) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), suspension solution; with ultrasonication. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 20.8 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly. 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. Solubility in Formulation 6: ≥ 2.08 mg/mL (4.75 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 20.8 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	2.2834 mL	11.4171 mL	22.8342 mL
	5 mM	0.4567 mL	2.2834 mL	4.5668 mL
	10 mM	0.2283 mL	1.1417 mL	2.2834 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.