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Synthesis, Molecular Structure, DNA/Protein Binding, Cytotoxicity, Apoptosis, Reactive Oxygen Species, and Mitochondrial Membrane Potential of Dibenzoxanthenes Derivatives

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Journal J Membr Biol
Date 2015 Sep 25
PMID 26400779
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Abstract

Two dibenzoxanthene isomers 3 and 4 were synthesized and characterized. The crystal structures of the two compounds were solved by single-crystal X-ray diffraction. Binding of two compounds with calf thymus DNA (CT DNA) and BSA (bovine serum albumin) has been thoroughly investigated by UV-Vis and fluorescence spectroscopy. The DNA-binding constants were determined to be 2.51 (± 0.09) × 10(3) for compound 3 and 4.55 (± 0.10) × 10(3) for compound 4. Two compounds can cleave pBR322 DNA upon irradiation. Significant nuclear damages of BEL-7402 cells were observed with compound treatment in a comet assay. The cytotoxicity in vitro was investigated by MTT method. These compounds have been found to induce nuclear condensation and fragmentation in BEL-7402 cells. The two compounds can enhance intracellular reactive oxygen species and decrease the mitochondrial membrane potential. The compounds activated caspase-3 and caspase-7, down-regulated the expression levels of anti-apoptotic protein Bcl-2, and up-regulated the expression levels of pro-apoptotic protein Bax. These compounds induce apoptosis of BEL-7402 cells through an ROS-mediated mitochondrial dysfunction pathway.

References
1.
Satyanarayana S, Dabrowiak J, Chaires J . Tris(phenanthroline)ruthenium(II) enantiomer interactions with DNA: mode and specificity of binding. Biochemistry. 1993; 32(10):2573-84. DOI: 10.1021/bi00061a015. View

2.
SAINT-RUF G, Poupelin J . The effect of dibenzoxanthenes on the paralyzing action of zoxazolamine. Naturwissenschaften. 1975; 62(12):584-5. DOI: 10.1007/BF01166986. View

3.
Hecht S . Bleomycin: new perspectives on the mechanism of action. J Nat Prod. 2000; 63(1):158-68. DOI: 10.1021/np990549f. View

4.
Cory S, Huang D, Adams J . The Bcl-2 family: roles in cell survival and oncogenesis. Oncogene. 2003; 22(53):8590-607. DOI: 10.1038/sj.onc.1207102. View

5.
Sathyadevi P, Krishnamoorthy P, Bhuvanesh N, Kalaiselvi P, Vijaya Padma V, Dharmaraj N . Organometallic ruthenium(II) complexes: synthesis, structure and influence of substitution at azomethine carbon towards DNA/BSA binding, radical scavenging and cytotoxicity. Eur J Med Chem. 2012; 55:420-31. DOI: 10.1016/j.ejmech.2012.08.001. View