Aluminium(III), chromium(III) and iron(III) complexes with 5-iodouracil and 5-iodouracil-histidine and their antitumour activity.

Abstract

Complexes of the type [Al(HL)(OH)Cl(2)], [M(HL)(OH)(2)Cl] and [M'(HL)(L')(OH)Cl], where HL = 5-iodouracil; HL' = histidine; M = Cr(III), Fe(III) and M' = Al(III), Cr(III), Fe(III), were synthesized and characterized. The complexes are polymeric showing high decomposition points and are insoluble in water and common organic solvents. The mu(eff) values, electronic spectral bands and ESR spectra suggest a polymeric 6-coordinate spin-free octahedral stereochemistry for the Cr(III) and Fe(III) complexes. 5-Iodouracil acts as a monodentate ligand coordinating to the metal ion through the O atom of C((4)) = O while histidine through the O atom of -COO(- ) and the N atom of -NH(2) group. In vivo antitumour effect of 5-iodouracil and its complexes was examined on C(3)H /He mice against P815 murine mastocytoma. As evident from their T/C values, Cr(III) and Fe(III) complexes display significant and higher antitumour activity compared to the 5-iodouracil ligand. The in vitro results of the complexes on the same cells indicate that Cr(III) and Fe(III) complexes show higher inhibition on (3)H-thymidine and (3)H-uridine incorporation in DNA and RNA replication, respectively, at a dose of 5 microg/mL.

• Authors: Vinod P Singh, Shweta Singh, K K Narang, D Bhattacharya
• Journal: Journal of enzyme inhibition and medicinal chemistry (J Enzyme Inhib Med Chem) Vol. 24 Issue 1 Pg. 105-10 (Feb 2009) ISSN: 1475-6374 [Electronic] England
• PMID: 18618327 (Publication Type: Journal Article)

Chemical References

• Antineoplastic Agents
• Metals, Heavy
• iodouracil
• Chromium
• Histidine
• Uracil
• RNA
• DNA
• Aluminum
• Iron

Topics

• Aluminum
• Animals
• Antineoplastic Agents (chemistry, pharmacology)
• Chromium
• DNA (antagonists & inhibitors)
• Histidine
• Iron
• Mastocytoma
• Metals, Heavy (chemistry, pharmacology)
• Mice
• Mice, Inbred Strains
• RNA (antagonists & inhibitors)
• Uracil (analogs & derivatives, chemistry, pharmacology)