SB273005 (SB 273005; SB-273005) is a novel and potent integrin inhibitor with potential usefulness in bone resorption, osteoporosis and arthritis. It inhibits integrin αvβ3 receptor and αvβ5 receptor with Ki values of 1.2 nM and 0.3 nM, respectively. SB 273005 binds αvβ3 and αvβ5 with low nM affinity, but binds weakly to integrins αIIbβ3 and α5β1. SB 273005 inhibits αvβ3-mediated cell adhesion with an IC50 value of 3 nM, endothelial cell migration with an IC50 of 1.8 nM, and osteoclast-mediated bone resorption with an IC50 of 11 nM in vitro.

Physicochemical Properties

Molecular Formula	C22H24F3N3O4
Molecular Weight	451.44
Exact Mass	451.171
Elemental Analysis	C, 58.53; H, 5.36; F, 12.63; N, 9.31; O, 14.18
CAS #	205678-31-5
Related CAS #	205678-31-5
PubChem CID	9868426
Appearance	White to off-white solid powder
Density	1.3±0.1 g/cm3
Boiling Point	662.9±55.0 °C at 760 mmHg
Flash Point	354.7±31.5 °C
Vapour Pressure	0.0±2.1 mmHg at 25°C
Index of Refraction	1.563
LogP	3.16
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	9
Rotatable Bond Count	8
Heavy Atom Count	32
Complexity	648
Defined Atom Stereocenter Count	1
SMILES	FC(C([H])([H])N1C([C@]([H])(C([H])([H])C(=O)O[H])C([H])([H])C2C([H])=C([H])C(=C([H])C=2C1([H])[H])OC([H])([H])C([H])([H])C1C([H])=C([H])C([H])=C(N([H])C([H])([H])[H])N=1)=O)(F)F
InChi Key	KSSPHFGIOASRDE-HNNXBMFYSA-N
InChi Code	InChI=1S/C22H24F3N3O4/c1-26-19-4-2-3-17(27-19)7-8-32-18-6-5-14-9-15(11-20(29)30)21(31)28(12-16(14)10-18)13-22(23,24)25/h2-6,10,15H,7-9,11-13H2,1H3,(H,26,27)(H,29,30)/t15-/m0/s1
Chemical Name	2-[(4S)-8-[2-[6-(Methylamino)pyridin-2-yl]ethoxy]-3-oxo-2-(2,2,2-trifluoroethyl)-4,5-dihydro-1H-2-benzazepin-4-yl]acetic acid
Synonyms	SB-273005; SB 273005; SB273005
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	In vitro activity: In vitro, SB273005 inhibits human osteoclast-mediated bone resorption with IC50 of 11 nM. In blood containing MDA-MB-231 cells, a combination of SB273005 and lamifiban inhibits tumor cell adhesion to vascular extracellular matrix (ECM). Kinase Assay: SB 273005 binds αvβ3 and αvβ5 with low nM affinity, but binds weakly to integrins αIIbβ3 and α5β1. SB 273005 inhibits αvβ3-mediated cell adhesion with an IC50 value of 3 nM, endothelial cell migration with an IC50 of 1.8 nM, and osteoclast-mediated bone resorption with an IC50 of 11 nM in vitro.
ln Vivo	In rat models of bone resorption and osteoporosis, SB273005 (30 mg/kg, p.o.) inhibits the parathyroid hormone-stimulated calcemic response, and inhibits bone loss. In rat with adjuvant-induced arthritis, SB273005 (60 mg/kg, p.o.) significantly reduces the symptoms of adjuvant-induced arthritis. SB273005 (1000 mg/kg/day, p.o.) causes acute, transient necrosis of vascular smooth muscle cell (VSMC) in aorta and renal arteries of mice. In pregnant mice, SB273005 reverses the reduction of Th1 cell-produced IL-2 levels and the increase of Th2 cell-derived IL-10 levels.
Animal Protocol	Dissolved in 1% methylcellulose; 30 mg/kg; i.p. injection Thyroidectomized parathyroidectomized (TPTx) rat model of bone resorption, and ovariectomized (Ovx) rat model of osteoporosis
References	J Med Chem.2000 Jan 13;43(1):22-6;Arthritis Rheum.2001 Jan;44(1):128-37.

Solubility Data

Solubility (In Vitro)

DMSO: 90 mg/mL (199.4 mM) Water:<1 mg/mL Ethanol:16 mg/mL (35.4 mM)

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	2.2151 mL	11.0757 mL	22.1513 mL
	5 mM	0.4430 mL	2.2151 mL	4.4303 mL
	10 mM	0.2215 mL	1.1076 mL	2.2151 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.