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| Cas No.: | 1073529-41-5 |
| Chemical Name: | 4-OXO-3,3-DIPHENYL-[1,2]DIAZETIDINE-1,2-DICARBOXYLIC ACID DIMETHYL ESTER |
| SMILES: | O=C(N1N(C(OC)=O)[C@@](C2=CC=CC=C2)(C3CCCC3)C1=O)OC |
| Formula: | C18H16N2O5 |
| M.Wt: | 340.330044746399 |
| Purity: | >98% |
| Sotrage: | 2 years -20°C Powder, 2 weeks 4°C in DMSO, 6 months -80°C in DMSO |
| Description: | ABL127 is a selective and covalent inhibitor of protein methylesterase 1 (PME-1) with IC50s of 6.4 nM and 4.2 nM in HEK293T and MDA-MB-231 cells, respectively. |
| Target: | IC50: 6.4 nM (PME-1 in HEK293T), 4.2 nM (PME-1 in MDA-MB-231)[1] |
| In Vivo: | No significant decrease in tumor burden can be assessed in these pilot studies[1]. Gel-based profiles indicate that brain PME-1 is inactivated by ABL127, but overlapping serine hydrolase activities preclude a confident assessment of the extent of inactivation[2]. |
| In Vitro: | Three described PME-1 inhibitors are tested in this assay and a thermal shift with 100 μM ABL127 is detected. Using 25 or 50 μM ABL127 also shows a shift in protein melting temperature. It is found that treatment of Ishikawa cells with ABL127 and AMZ-30 significantly decreases cell proliferation similarly to depletion of PME-1 with shRNA. It is also found that treatment of ECC-1 cells with ABL127 or AMZ-30 affects cell invasion in a dose-dependent manner. The treatment of EC cells with ABL127 leads to a significant ~45 % increase in protein phosphatase 2A (PP2A) activity, while treatment with AMZ-30 leads to a modest ~10 % increase in PP2A activity[1]. |
| Kinase Assay: | Human PME-1 protein lacking the last three amino acids (PME-1des3) is purified from Sf9 cells. The assay is completed by first conducting a 10 min pre-incubation of 1 μM PME-1des3 with 100 μM ABL127, 100 μM AMZ-30, 100 μM EHT, or vehicle (0.05 % DMSO) in the presence of SYBR Orange (1:1000, v/v) at 37°C in 1× NEB buffer 2 (50 mM NaCl, 10 mM Tris-HCl, 10 mM MgCl2, 1 mM DTT, pH 7.9 at 25 °C); a thermal gradient is performed increasing temperature by 2°C per minute increments from 37 to 95°C, and fluorescence (492 to 610 nm) is acquired on a thermal cycler[1]. |
| Cell Assay: | Cells are subjected to 5 μg/mL puromycin selection for 10 to 14 days and are clonally expanded. Validated clones are incubated with media and compounds (including ABL127) for the indicated times for phenotypic assays[1]. |
| Animal Administration: | ECC-1 cells are subcutaneously inoculated into the flanks of female SCID mice and are allowed to grow until tumors reached ~400 mm3. A single intratumoral dose of ABL127 diluted in 10% DMSO/PBS is administered. The highest concentration tested is 5 mg/kg of ABL127 due to poor solubility of the compound[1]. |
| References: | [1]. Pusey M, et al. Inhibition of protein methylesterase 1 decreased cancerous phenotypes in endometrial adenocarcinoma cell lines and xenograft tumor models. Tumour Biol. 2016 Sep;37(9):11835-11842. [2]. Bachovchin DA, et al. Academic cross-fertilization by public screening yields a remarkable class of protein phosphatase methylesterase-1 inhibitors. Proc Natl Acad Sci U S A. 2011 Apr 26;108(17):6811-6. |