In Vivo (Add solvents to the product individually and in order.)
Homogeneous suspension
CMC-NA
≥5mg/ml
Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution
5%DMSO
40%PEG300
5%Tween80
50%ddH2O
Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.
0.510mg/ml
(1.07mM)
Taking the 1 mL working solution as an example, add 50 μL of 10.2 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to clarify; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.
Clear solution
5% DMSO
95% Corn oil
Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.
0.510mg/ml
(1.07mM)
Taking the 1 mL working solution as an example, add 50 μL of 10.2 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.
* <1 mg/ml means slightly soluble or insoluble. * Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations. * Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)
Preparing Stock Solutions
Biological Activity
Description
VR23 is a potent proteasome inhibitor with IC50 of 1 nM, 50-100 nM, and 3 μM for trypsin-like proteasomes, chymotrypsin-like proteasomes, and caspase-like proteasomes, respectively.
Targets
Trypsin-like proteasomes (in Hela cells)
Chymotrypsin-like proteasomes (in Hela cells)
Caspase-like proteasomes (in Hela cells)
1 nM
100 nM
3 μM
In vitro
In HeLa cells, VR23 induces ubiquitinated proteins accumulation. In RPMI 8226 and KAS 6 cells, this compound inhibits cell growth with IC50 of 2.94 and 1.46 μM, respectively. It is also equally effective on both bortezomib (BTZ)-sensitive and -resistant RPMI 8226 and ANBL6 cells. When used in combination of bortezomib in the cells above, this chemical shows synergistic effects on cell growth inhibition. In addition, it selectively induces cancer cell apoptosis by causing the accumulation of ubiquitinated cyclin E.
In Vivo
In ATH490 athymic mice engrafted with MDA-MB-231 metastatic breast cancer cells, VR23 (30mg/kg, i.p.) shows effective antitumor and antiangiogenic activities. This compound also reduces adverse effects caused by paclitaxel in mice.
Exponentially growing cells on a 96-well clustered plate are treated with different concentrations of drugs or left untreated (control) for 6 hours. Proteasomes extracted with 0.5% NP40 buffer are mixed with equal amounts of samples in 100 μL total volume, and then incubated with 25 μmol/L of fluorogenic substrates (LRR- specific for trypsin-like activity, LLE-specific for caspase-like activity, and SUVY-specific for chymotrypsin-like activity) in black-bottom 96-well plates at 37°C. Fluorescence is monitored every 5 minutes at the wavelength of 360 nm (excitation) and 480 nm (emission).
RPMI 8226, KAS 6, 184B5, and MCF10A cells; bortezomib-resistant RPMI 8226 cells and bortezomib-resistant ANBL6 cells
Concentrations
~20 μM
Incubation Time
--
Method
Clonogenic and SRB assays are carried out. IC50 values are calculated using a sigmoidal dose-response curve (variable slope) using a Graph Pad Prism V 4.02 version.
Prolonged unfolded protein reaction is involved in the induction of chronic myeloid leukemia cell death upon oprozomib treatment
[ Cancer Sci, 2020, 112(1):133-143]
RETURN POLICY
Selleck Chemical’s Unconditional Return Policy ensures a smooth online shopping experience for our customers. If you are in any way unsatisfied with your purchase, you may return any item(s) within 7 days of receiving it. In the event of product quality issues, either protocol related or product related problems, you may return any item(s) within 365 days from the original purchase date. Please follow the instructions below when returning products.
SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.
NOT FOR HUMAN, VETERINARY DIAGNOSTIC OR THERAPEUTIC USE.
