Four different methods were used to measure the “in vitro” antioxidant capacity of three cobalt complexes recently proposed as anticancer active principles: a new biosensor method and a new pulse voltammetric, or pulse polarographic method, together with two other methods - one fluorimetric and the other spectrophotometric. Results obtained using the different methods are discussed and compared with the anti-metastatic effect recently measured “in vivo” by Russian authors. The good correlation found between anti-tumoral and anti-metastatic activity ranking and in vitro antioxidant activity found by the new voltammetric method suggests interesting hypotheses based on the anti-tumoral effect of these complexes.
Keywords: superoxide dismutase, ORAC Spectrofluorimetric Method, Differential Pulse Voltammetry, pH value, antioxidant
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