Computational And Biological Studies Of Platinum(II) Complex Of Tryptathrin Schiff Base

Abstract A series of tryptanthrin alkaloid based ligands (L1-L7) and corresponding platinum(II) complexes were synthesized and characterized by various spectroscopic techniques, LC-MS, magnetic measurement, and electronic spectra. DFT studies were performed for structure optimization. Viscosity measurement, UV-Vis spectroscopy, and molecular docking studies were used to determine the binding mode between CT-DNA and complexes; the intercalation mode of bindings was concluded from the study. The Kb values for compounds-DNA binding were found in the range of 0.42 × 105 – 3.90 × 105 M− 1. The binding study of complexes with BSA was evaluated by fluorescence quenching study, and the value of Ksv, binding constant (Ka), and binding site(n) were in the range of 1.14–2.70 × 103 M− 1, 0.13–0.55 × 105 M− 1, and 0.94–1.16, respectively. Bacteriostatic activity of the synthesized compound was performed against gram + ve and gram -ve bacteria. MIC values of complexes and ligands were found in the range of 35–75 µM and 150–245 µM, respectively. BSLB was performed to check the cytotoxicity of the synthesized compounds. The LC50 values of the ligands and complexes were found in the range of 9.24–11.18 µg/mL and 5.9–7.94 µg/mL, respectively. Anticancer activity against the MG-63 cell line was performed to check potency against the cancer cell line. The IC50 values of the synthesized compounds were found in the range of 10.9 µg/mL 28.7µg/mL. IC50 value of the complex III is 10.9 µg/mL, which is comparable with the standard drug cisplatin.