Abstract
Manganese-containing superoxide dismutase (Mn-SOD) activity in lung cancer tissues from 5 patients with pulmonary carcinoma were measured by the nitrite formation method, lipid peroxide (LPO) values being measured by spectrophotometry of thiobarbituric acid reaction. The results obtained show that Mn-SOD activity exhibits most evidently in lung cancer tissues, less evidently in peripheral tissues around the lung cancer, but the least in normal peripheral lung tissues, indicating a declined tendency as definitely proved by statistical treatment (P<0.01). In addition, LPO values are found to be lower in lung cancer tissues than those in normal peripheral tissues.
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