Assay for erythrocyte superoxide dismutase activity in patients with lung cancer and effects on pollution and smoke trace elements |
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Authors: | M C Martin-Mateo L M Molpeceres G Ramos |
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Institution: | (1) Department of Biochemistry, Molecular Biology & Physiology, Faculty of Science, Paseo del Prado de la Magdalena s/n, 47005 Valladolid, Spain;(2) Service of Thoracic Surgery, University Hospital, Valladolid, Spain |
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Abstract: | The antioxidative effect of CuZnSOD, which catalyzes the dismutation of Superoxide anion (O2-), provides a defense against the oxygen toxicity. The object of the study is to evaluate the erythrocytes Superoxide dismutase
(SOD) activity in two groups of persons (Group I, healthy blood donors; Group II, lung cancer patients), using the spectrophotometric
assay of NADH oxidation and the indirect method (2–27).
The effect of trace elements, such as A13-, Cr3+, Fe3+, Hg2+, NI2+, and Pb2+ (producing free radicals oxygen and present in pollution and smoke) is also evaluated.
The results show the decrease of SOD activity in lung cancer patients with respect to healthy individuals. Likewise, in those
patients the enzymatic activity is bigger in early stage (I,II) with respect to advanced one (III) (p < 0.05). The lesser activity when the samples are incubated with Ni or Pb point out that these metals play a role in neoplasm
development. In short, the oxidant-antioxidant balance is altered in lung cancer patients. |
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Keywords: | CuZn Superoxide dismutase (SOD EC 1 15 1 1 ) Superoxide radical (O2-) lung cancer erythrocytes aluminium (Al3+) chromium (Cr3+) iron (Fe3+) mercury (Hg2+) lead (Pb2+) nickel (Ni2+) |
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