Platelet glyoxalases in thrombocytosis

Abstract
In platelets of patients suffering from thrombocytosis due to myeloproliferative disorders, glyoxalase I activity is significantly higher than in controls (P < 0.01), while glyoxalase II levels are the same (P < 0.3). The endocellular concentration of glutathione is also increased in patients. Km values for methylglyoxal (glyoxalase I) and S-lactoylglutathione (glyoxalase II) are identical both in normal and pathological subjects, as are the thermostability of the 2 enzymes. The higher activity observed for glyoxalase I in patients could be related to a specific role of this enzyme in platelets.

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