Abstract
Methylglycine, also known sarcosine, is dramatically used in drug molecules and its metal complexes can interact to DNA and also do cleavage. Hence, to study the influence of methylglycine ligand on biological behavior of metal complexes, two water-soluble platinum (II) complexes with the formula cis-[Pt(NH3)2(CH3-gly)]NO3 and cis-[Pt(NH2-CH3)2(CH3-gly)]NO3 (where CH3-gly is methylglycine) have been synthesized and characterized by spectroscopic methods, molar conductivity measurements, and elemental analyzes. The anticancer activity of synthesized complexes was tested against human breast adenocarcinoma cell line of MCF7 using MTT assay and results showed excellent anticancer activity with Cc50 values of 126 and 292 μM after 24 h incubation time, for both complexes of cis-[Pt(NH3)2(CH3gly)]NO3 and cis-[Pt(NH2-CH3)2(CH3gly)]NO3, respectively. Also, the interaction between Pt(II) complexes with calf thymus DNA was extensively studied by means of absorption spectroscopy, fluorescence titration spectra displacement with ethidium bromide (EtBr), and circular dichroism studied in Tris-buffer. The obtained spectroscopic results revealed that two complexes can bind to highly polymerized calf thymus DNA cooperatively and denature at micromolar concentrations. The fluorescence data indicate that quenching effect for cis-[Pt(NH3)2(CH3gly)]NO3 (Ksv = 9.48 mM−1) was higher than that of cis-[Pt(NH2-CH3)2(CH3gly)]NO3 (Ksv = 1.98 mM−1). These results were also confirmed by circular dichrosim spectra. Consequently, docking data showed that cis-[Pt(NH3)2(CH3gly)]NO3 with more interaction energy binds on DNA via groove binding which is more compatible with experimental results.
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Abbreviations
- CT-DNA:
-
Calf thymus DNA
- Methylgly:
-
Methyl glycine
- CD:
-
Circular dichroism
- EB:
-
Ethidium bromide
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The Research Council of Chemistry & Chemical Engineering Research Center of Iran is gratefully acknowledged for supporting this work.
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Shams Abyaneh, F.S., Eslami Moghadam, M., Divsalar, A. et al. Improving of Anticancer Activity and Solubility of Cisplatin by Methylglycine and Methyl Amine Ligands Against Human Breast Adenocarcinoma Cell Line. Appl Biochem Biotechnol 186, 271–291 (2018). https://doi.org/10.1007/s12010-018-2715-5
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DOI: https://doi.org/10.1007/s12010-018-2715-5