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THE EFFECT OF CHITOSAN ON THE SYNTHESIS OF L-S-NITROSOCYSTEINE THAT PARTICIPATES IN THE REGULATION OF THE M2 PYRUVATE KINASE ISOENZYME ACTIVITY ASSOCIATED WITH EHRLICH ASCITES CELLS PROLIFERATION IN VITRO

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Ignacak J., Zagajewski J., Pałka I., Wiśniewska-Wrona M., Niekraszewicz A.

Progress on Chemistry and Application of Chitin and its Derivatives

2010

vol. 15

149 - 158

L-S-nitrosocysteine formation in EAT tumor cells and normal CRL-1636 cells incubated with microcrystalline chitosan was confirmed by RP-HPLC. The metabolite was identified based on UV-VIS spectra. The formation of L-S-nitrosocysteine in EAT tumor cells contributes to decreasing the level of L-cysteine in these cells. L-cysteine as an effector of the bifunctional M2 isoenzyme of pyruvate kinase (PK) initiates its histone kinase activity, which is responsible for histone H1 phosphorylation. A decrease of L-cysteine level in EAT tumor cells contributes to lack of histone H1 phosphorylation by the M2 PK isoenzyme and by the same token to inhibition of EAT cell proliferation.

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1 Progress on Chemistry and Application of Chitin and its Derivatives

1 2010

1 Ignacak J.

1 Niekraszewicz A.

1 Pałka I.

1 Wiśniewska-Wrona M.

1 Zagajewski J.

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THE EFFECT OF CHITOSAN ON THE SYNTHESIS OF L-S-NITROSOCYSTEINE THAT PARTICIPATES IN THE REGULATION OF THE M2 PYRUVATE KINASE ISOENZYME ACTIVITY ASSOCIATED WITH EHRLICH ASCITES CELLS PROLIFERATION IN VITRO