title: Synthesis of carbohydrate-conjugate heterobimetallic Cu(II)-Sn(2)(IV) and Zn(II)-Sn(2)(IV) complexes; their interactions with CT DNA and nucleotides; DNA cleavage, in-vitro cytotoxicity.
abstract: The new heterobimetallic Ni(II)-Sn(2)(IV) (1), Cu(II)-Sn(2)(IV) (2) and Zn(II)-Sn(2)(IV) (3) complexes, containing D-glucosamine, 1,8-diamino-3,6-diazaoctane and imidazole were isolated and characterized by spectral and analytical methods. The proposed geometry of Ni(II) and Cu(II) in 1 and 2 was square pyramidal, Zn(II) in 3 exhibited tetrahedral while Sn(IV) exhibits hexacoordinate environment, respectively. The X-ray powder diffraction (XRPD) confirmed the amorphous nature of all the complexes. The interaction studies of 2 and 3 with CT DNA were carried out by various biophysical techniques to show the mode of binding. The interaction of 2 and 3 with nucleotides viz 5'-GMP and 5'-TMP, respectively were further confirmed by (1)H, (31)P and (119)Sn NMR spectroscopy. The complex 2 exhibited effective cleavage activity with pBR322 DNA. Furthermore, the cytotoxicity of 2 was examined on a panel of human tumor cell lines of different histological origins and showed good activity against Colo205 and A2780 (GI50 < 10 μg/ml).
authors.affiliation: Department of Chemistry, Aligarh Muslim University, Aligarh, UP 202002, India. tsartaj62@yahoo.com
authors.forename: Sartaj
authors.initials: S
authors.lastname: Tabassum
authors.forename: Rais Ahmad
authors.initials: RA
authors.lastname: Khan
authors.forename: Farukh
authors.initials: F
authors.lastname: Arjmand
authors.forename: Aarti S
authors.initials: AS
authors.lastname: Juvekar
authors.forename: Surekha M
authors.initials: SM
authors.lastname: Zingde
mesh_terms: D002241:Carbohydrates / Q000737:chemistry*; D045744:Cell Line, Tumor; D003300:Copper / Q000737:chemistry*; D004247:DNA / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D006801:Humans; D006860:Hydrogen Bonding; D006868:Hydrolysis; D066298:In Vitro Techniques; D009682:Magnetic Resonance Spectroscopy; D013055:Spectrophotometry, Infrared; D013324:Strontium / Q000737:chemistry*; D014961:X-Ray Diffraction; D015032:Zinc / Q000737:chemistry*
chemical_list: D002241:Carbohydrates; D003300:Copper; D004247:DNA; D015032:Zinc; D013324:Strontium