Metal Cu(II) and Zn(II) bipyridyls as inhibitors of lactate dehydrogenase
- 2 June 2007
- journal article
- Published by Springer Science and Business Media LLC in BioMetals
- Vol. 21 (2), 117-126
- https://doi.org/10.1007/s10534-007-9098-3
Abstract
Metal complex-protein interaction is an evolving concept for determining cellular targets of metallodrugs. Lacatate dehydrogenase (LDH) is critically implicated in tumor growth and therefore, considered to be an important target protein for anti-tumor metal complexes. Due to efficient biocompatibility of copper (Cu(2+)) and zinc (Zn(2+)), we synthesized CubpyAc(2) . H(2)O (Cu-bpy) and ZnbpyAc(2) . H(2)O (Zn-bpy; where bpy = 2,2' bipyridine, Ac = CH(3)COO(-)) complexes and evaluated their interaction with and modulation of LDH in mouse tissues. The increasing concentration of both the complexes showed a significant shift in UV-Vis spectra of LDH. The binding constant data (Kc = 1 x 10(3) M(-1) for Cu-bpy and 7 x 10(6) M(-1) for Zn-bpy) suggested that Zn-bpy-LDH interaction is stronger than that of Cu-bpy-LDH. LDH modulating potential of the complexes were monitored by perfusing the mice tissues with non-toxic doses of Cu-bpy and Zn-bpy followed by activity measurement and analysis of LDH isozymes on non-denaturing polyacrylamide gel electrophoresis (PAGE). As compared to the control sets, Cu-bpy caused a significant decline (P < 0.05-0.001) in the activity of LDH in all the tissues studied. However, Zn-bpy showed inhibition of LDH only in liver (P < 0.01), kidney (P < 0.001) and heart (P < 0.01), but with no effect in spleen, brain and skeletal muscle tissues. PAGE analysis suggested that all the five LDH isozymes are equally sensitive to both the complexes in the respective tissues. The results suggest that Cu- and Zn-bpy are able to interact with and inhibit LDH, a tumor growth supportive target protein at tissue level.Keywords
This publication has 63 references indexed in Scilit:
- Copper-1,10-Phenanthroline-Induced Apoptosis in Liver Carcinoma Bel-7402 Cells Associates with Copper Overload, Reactive Oxygen Species Production, Glutathione Depletion and Oxidative DNA DamageBioMetals, 2006
- The Wide Pharmacological Versatility of Semicarbazones, Thiosemicarbazones and Their Metal ComplexesMini-Reviews in Medicinal Chemistry, 2004
- Ruthenium metallopharmaceuticalsCoordination Chemistry Reviews, 2003
- Evaluation of 2-deoxy-D-glucose as a chemotherapeutic agent: mechanism of cell deathBritish Journal of Cancer, 2002
- Comparison of the effects of ammonia on brain mitochondrial function in rats and gulf toadfishAmerican Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 2002
- Handbook on MetalloproteinsPublished by Taylor & Francis Ltd ,2001
- An Analog of the Human Albumin N-Terminus (Asp-Ala-His-Lys) Prevents Formation of Copper-Induced Reactive Oxygen SpeciesBiochemical and Biophysical Research Communications, 2001
- The Galvanization of Biology: A Growing Appreciation for the Roles of ZincScience, 1996
- Serum Ultrafiltrable Copper, Total Copper and Caeruloplasmin Concentrations in Gynaecological CarcinomasAnnals of Clinical Biochemistry: International Journal of Laboratory Medicine, 1993
- Nature and Development of Lactic DehydrogenasesScience, 1962