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Salen-manganese complexes are superoxide dismutase-mimics
Biochemical and Biophysical Research Communications
|April 30, 1993
Summary
Manganese (salen) complexes show significant superoxide dismutase (SOD) activity, acting as effective mimics. Their stability and catalytic power suggest potential therapeutic applications for conditions involving excess oxygen free radicals.
Area of Science:
- Coordination Chemistry
- Biochemistry
- Medicinal Chemistry
Background:
- Manganese complexes are known to possess superoxide dismutase (SOD) activity.
- Superoxide radicals (O2..) are implicated in various pathological conditions.
Purpose of the Study:
- To evaluate the SOD-mimicking capabilities of various (salen)-manganese complexes.
- To assess the influence of complex charge and assay conditions on SOD activity.
Main Methods:
- Synthesis and characterization of neutral and cationic (salen)-manganese complexes.
- In vitro assays to measure the ability of complexes to scavenge superoxide radicals.
- Evaluation of the effect of bovine serum albumin and EDTA on complex activity.
Main Results:
- Both neutral and cationic (salen)-manganese complexes demonstrated significant SOD-mimic activity.
- Complex activity was generally unaffected by bovine serum albumin.
- EDTA inhibited the activity of most tested complexes, suggesting a role for manganese ions.
Conclusions:
- Certain (salen)-manganese complexes exhibit potent SOD-mimic properties.
- The stability and catalytic efficiency of these complexes indicate potential therapeutic value.
- Further research is warranted for applications in diseases associated with oxidative stress.