The reaction of K2PtCl4 with anticancer-alkylating agent mechlorethamine hydrochloride (CH3NH(C2H4Cl)2 x
HCl = HN2xHCl), in the molar ratio 1 : 2, affords the complex [H2N2]2[PtCl4]. In vitro antimicrobial and lipoxygenase
inhibitory activities of the complex and its precursor were evaluated. Antimicrobial activity of the HN2xHCl and
[H2N2]2[PtCl4] complex was investigated against 29 species of microorganisms. Testing is performed by microdilution
method. Minimum inhibitory concentration (MIC) and minimum microbicidal concentration (MMC) have been determined.
The difference between antimicrobial activity of precursor and corresponding platinum(II) complex is noticed and
the activity of the precursor was higher. Tested compounds demonstrated the high and significant antifungal activity and
low to moderate antibacterial activity. It was shown that the gram-positive bacteria were more sensitive than the gramnegative.
UV absorbance-based enzyme assays were performed with HN2xHCl and [H2N2]2[PtCl4] complex, in order to
evaluate their in vitro inhibitory activity of soybean lipoxygenase (LOX), also. Assay with LOX showed significantly
greater inhibitory activity of the complex, than the precursor.
Keywords: Antibacterial activity, Antifungal activity, Mechlorethamine hydrochloride, Platinum(II) complex, Soybean
lipoxygenase inhibition, DNA, RNA, proteins, purine bases, histidine
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