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[Effect of platinum and palladium compounds on mitochondrial enzymatic systems]
Abstract:
Effect of platinum and palladium complexes on respiration and ATPase activity in bovine heart tissue as well as on respiration of submitochondrial particles was studied. The highest inhibitory activity was exhibited by the complexes of platinum and palladium with pi-ligands in internal coorhdinational sphere such as ethylene-C H4, norbornadiene-C7H8 and allyl-C3H5. The electron density at the central atom of the complex was not responsible for the inhibitory affect of platinum and palladium on mitochondria.
Insights
Platinum and palladium complexes with pi-ligands strongly inhibit mitochondrial respiration and ATPase activity. Inhibitory effects on bovine heart mitochondria were linked to ligand type, not central atom electron density.
Area of Science:
- Biochemistry
- Mitochondrial Physiology
- Inorganic Chemistry
Context:
- Mitochondria are crucial for cellular energy production.
- Platinum and palladium complexes are investigated for biological activity.
- Understanding their effects on mitochondrial function is important.
Purpose:
- To investigate the impact of platinum and palladium complexes on mitochondrial respiration and ATPase activity.
- To identify structural features of these complexes responsible for inhibitory effects.
Summary:
- Platinum and palladium complexes, particularly those with pi-ligands (ethylene, norbornadiene, allyl), significantly inhibited respiration and ATPase activity in bovine heart mitochondria and submitochondrial particles.
- The electron density of the central platinum or palladium atom did not correlate with the observed inhibitory potency.
Impact:
- Provides insights into the mechanism of mitochondrial inhibition by metal complexes.
- Highlights the role of ligand structure in determining biological activity.
- Informs the design of novel metal-based compounds with specific biological effects.