Biopolym. Cell. 2012; 28(3):223-228.
http://dx.doi.org/10.7124/bc.000052
Bioorganic Chemistry
Glycyrrhetinic acid and its derivatives as inhibitors of poly(ADP-ribose)polymerases 1 and 2, apurinic/apyrimidinic endonuclease 1 and DNA polymerase β
1Zakharenko A. L., 2Salomatina O. V., 1Sukhanova M. V., 1Kutuzov M. M., 1Ilina E. S., 1Khodyreva S. N., 3Schreiber V., 2Salakhutdinov N. F., 1Lavrik O. I.
  1. Novosibirsk Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences
    8, Akademika Lavrentieva Ave., Novosibirsk, Russian Federation, 630090
  2. N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences
    9, Akademika Lavrentieva Ave., Novosibirsk, Russian Federation, 630090
  3. UMR7242, University of Strasbourg, CNRS, ESBS
    Cedex Illkirch Cedex, France, 67412

Abstract

Aim. For strengthening the efficiency of monofunctional alkylating antineoplastic drugs it is important to lower the capacity of base excision repair (BER) system which corrects the majority of DNA damages caused by these reagents. The objective was to create inhibitors of the key BER enzymes (PARP1, PARP2, DNA polymerase β, and APE1) by the directed modification of glycyrrhetinic acid (GA). Methods. Amides of GA were produced from the GA acetate by formation of the corresponding acyl chloride, amidation with the appropriate amine and subsequent deacylation. Small library of 2-cyano substituted derivatives of GA methyl esters was obtained by the structural modification of GA framework and carboxylic acid group. The inhibitory capacity of the compounds was estimated by comparison of the enzyme activities in specific tests in the presence of compounds versus their absence. Results. None of tested compounds inhibits PARP1 significantly. Unmodified GA and its morpholinic derivative were shown to be weak inhibitors of PARP2. The derivatives of GA containing keto-group in 11 triterpene framework were shown to be moderate inhibitors of pol β. Compound 3, containing 12-oxo-9(11)-en moiety in the ring C, was shown to be a single inhibitor of APE1 among all compounds studied. Conclusions. The class of GA derivatives, selective pol β inhibitors, was found out. The selective inhibitor of APE1 and weak selective inhibitor of PARP2 were also revealed.
Keywords: DNA polymerase β, poly(ADP-ribose)polymerases 1 and 2, apurinic/apyrimidinic endonuclease 1, glycyrrhetinic acid, inhibitor
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