A Study on Hydrolytic Stability of Isatin N-Mannich Bases
作者:D. D. Orlova、D. S. Novikova、A. V. Garabadzhiu、V. G. Tribulovich
DOI:10.1134/s1070363218010085
日期:2018.1
Stability parameters of biologically active compounds with N-Mannich base motif in their structure, which is susceptible to hydrolysis, have been studied. A procedure for the synthesis of small molecule compounds reactivating the function of the p53 tumor suppressor protein was developed, and the dependence of the Mannich base degradation rate on the structure of the compounds was established. For the hydrolysis reaction we determined the rate constants and calculated rho, Delta G#, Delta H, and Delta S. Modifications of active compounds that retain the activity at the maximum possible stability were proposed.
A series of isatin Schiff base derivatives were identified during in silk screening of the small molecule library for novel activators of p53. The compounds selected based on molecular docking results were further validated by a high-content screening assay using U2OS human osteosarcoma cells with an integrated EGFP-expressing p53-dependent reporter. The hit compounds activated and stabilized p53, as shown by Western blotting, at higher rates than the well-known positive control Nutlin-3. Thus, the p53-activating compounds identified by this approach represent useful molecular probes for various cancer studies.
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