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| 2mg |
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| 5mg |
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| 10mg |
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| 25mg |
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| 50mg |
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Purity: ≥98%
Obatoclax Mesylate (also known as GX15 070), the mesylate salt of obatoclax, is a potent inhibitor of Bcl-2 (B-cell leukemia protein-2) protein with a Ki of 0.22 μM in a cell-free assay. Obatoclax interacts with BCL-2 and other members of the BCL-2 family that share the BH3-binding site, such as BCL-XL, MCL-1, A1, and BCL-B. Obatoclax mesylate, a pan-BCL-2 inhibitor, exhibits antitumor activity in mouse xenografts of solid tumor and myeloma cell lines and is being studied for the treatment of refractory malignancies. It directly induces apoptosis in cultured acute myeloid leukemia (AML) cells as well as primary patient samples. In many cancers, including those of the lymphatic system, breast, lung, prostate, and colon, the Bcl-2 protein family is overexpressed. Obatoclax is a Bcl-2 inhibitor, and as such, it has anticancer properties.
| Targets |
Bcl-2 (Ki=220 nM); Mcl-1 (Ki=1-7 μM); Bcl-xL (Ki=1-7 μM); Bcl-W (Ki=1-7 μM); Bcl-B (Ki=1-7 μM)
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| ln Vitro |
Obatoclax Mesylate (GX15-070 Mesylate) inhibits BCL-2, BCL-XL, MCL-1, BCL-w, A1, and BCL-b with Ki values≈1-7 μM[2].
Obatoclax Mesylate (50-200 nM; 24-72 hours) induces a dose- and time-dependent reduction of cell numbers in all human colorectal cancer cell lines. Particularly, for HCT116, HT-29, and LoVo cells, the IC50 for cell proliferation at 72 h is 25.85, 40.69, and 40.01 nM, respectively[1].
Obatoclax Mesylate (400 nM; for 24 hours) induces autophagy in OSCC cells[3].
Obatoclax Mesylate (50-200 nM; for 24 hours) provokes a dose-dependent increase in the G1-phase cell populations[1].
?Obatoclax Mesylate (25-200 nM; for 24 hours) indicates a marked drop in cyclin D1 levels as low as 50 nM[1].
Obatoclax Mesylate causes cyclin D1 to degrade in either a T286 phosphorylation-dependent or -independent manner. The steady-state levels of p-Cyclin D (T286) in HCT116 and LoVo cells started to decrease after exposure to obatoclax Mesylate (200 nM; 1, 3, 6, 12, 24 hours). In HT-29 cells, obatoclax mesylate barely affects ERK1/2 activity while inhibiting GSK3 and activating p38MAPK[1].
Obatoclax Mesylate (50-450 nM) potently inhibits the clonogenic potential of oral cancer cells[1].
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| ln Vivo |
Obatoclax Mesylate (GX15-070 Mesylate; 1.15-5 mg/kg; intravenously injected; five consecutive days) In xenograft mouse models, Obatoclax Mesylate demonstrates potent antitumor activity in a dose-dependent manner[4].
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| Enzyme Assay |
A predicted binding affinity for Obatoclax binding to BCL-2 is calculated using the SIE scoring function. [4] As a control in determining the reliability of the calculation, predicted binding affinities Ki) are calculated for a set of 12 small molecules with experimentally measured binding affinities to BCL-2.
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| Cell Assay |
Obatoclax is dissolved in DMSO at a stock concentration of 5 mM. Cell viability is assayed by MTT. Human MM cells (HMCLs), peripheral blood lymphocytes (PBLs), bone marrow stromal cells (BMSCs) are seeded in 96-well plates at a density of 2 × 104 per well for HMCLs or 5~10 × 103 for PBLs. Various concentrations of Obatoclax are added to the cells, with or without IGF-1 (50 ng/mL) or IL-6 (10 ng/mL). Cells are incubated for 48-72 hours and cell viability is determined.
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| Animal Protocol |
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| References |
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| Molecular Formula |
C20H19N3O.CH4O3S
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| Molecular Weight |
413.49
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| Exact Mass |
317.1528
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| Elemental Analysis |
C, 61.00; H, 5.61; N, 10.16; O, 15.48; S, 7.75
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| CAS # |
803712-79-0
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| Related CAS # |
Obatoclax;803712-67-6
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| Appearance |
Solid powder
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| SMILES |
S(C([H])([H])[H])(=O)(=O)O[H].O(C([H])([H])[H])C1=C([H])/C(=C2\C([H])=C3C([H])=C([H])C([H])=C([H])C3=N\2)/N([H])/C/1=C(\[H])/C1=C(C([H])([H])[H])C([H])=C(C([H])([H])[H])N1[H]
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| InChi Key |
ZFKXDVMHNXPEIY-PEZBNFGJSA-N
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| InChi Code |
InChI=1S/C20H19N3O.CH4O3S/c1-12-8-13(2)21-16(12)10-19-20(24-3)11-18(23-19)17-9-14-6-4-5-7-15(14)22-17;1-5(2,3)4/h4-11,21-22H,1-3H3;1H3,(H,2,3,4)/b19-10-;
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| Chemical Name |
(Z)-2-(2-((3,5-dimethyl-1H-pyrrol-2-yl)methylene)-3-methoxy-2H-pyrrol-5-yl)-1H-indole methanesulfonate
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| Synonyms |
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| HS Tariff Code |
2934.99.9001
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| Storage |
Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month |
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| Shipping Condition |
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
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| Solubility (In Vitro) |
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| Solubility (In Vivo) |
Solubility in Formulation 1: ≥ 0.83 mg/mL (2.01 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (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 8.3 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 2: ≥ 0.83 mg/mL (2.01 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (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 8.3 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. View More
Solubility in Formulation 3: 30% PEG400+0.5% Tween80+5% Propylene glycol : 30 mg/mL |
| Preparing Stock Solutions | 1 mg | 5 mg | 10 mg | |
| 1 mM | 2.4184 mL | 12.0922 mL | 24.1844 mL | |
| 5 mM | 0.4837 mL | 2.4184 mL | 4.8369 mL | |
| 10 mM | 0.2418 mL | 1.2092 mL | 2.4184 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.
Calculation results
Working concentration： mg/mL；
Method for preparing DMSO stock solution： mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.
Method for preparing in vivo formulation:：Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O，mix and clarify.
(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
(2) Be sure to add the solvent(s) in order.
| NCT Number | Status | Interventions | Conditions | Sponsor/Collaborators | Start Date | Phases |
| NCT00427856 | Completed | Drug: Obatoclax mesylate Drug: Rituximab |
Lymphoma, Follicular | Gemin X | March 2007 | Phase 2 |
| NCT00413114 | Completed | Drug: Obatoclax mesylate (GX15-070MS) |
Myelodysplastic Syndromes | Gemin X | December 2006 | Phase 2 |
| NCT00600964 | Completed | Drug: GX15-070MS | Chronic Lymphocytic Leukemia | Gemin X | September 2004 | Phase 1 |
 Obatoclax induces massive necrosis in mouse and human thyroid cancer cells.Oncotarget.2016 Jun 7;7(23):34453-71. |
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 Obatoclax blocks late authophagy, unrelated to cell death.Oncotarget.2016 Jun 7;7(23):34453-71. |
 Obatoclax autofluorescence reveals its accumulation in lysosomes.Oncotarget.2016 Jun 7;7(23):34453-71. |
 Obatoclax induces morphological and functional alterations in lysosomes.Oncotarget.2016 Jun 7;7(23):34453-71. |
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 Lysosomal acidic environment is critical for necrotic death induced by Obatoclax.Oncotarget.2016 Jun 7;7(23):34453-71. |
 Mouse and human thyroid cancer cells are sensitive to lysosomal destabilization.Oncotarget.2016 Jun 7;7(23):34453-71. |
 Obatoclax does not induce massive LMP, and its effect is independent of BCL2 proteins.Oncotarget.2016 Jun 7;7(23):34453-71. |
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