RT Journal Article
SR Electronic
T1 Disturbance of systemic antioxidant profile in nonsmall cell lung carcinoma
JF European Respiratory Journal
JO Eur Respir J
FD European Respiratory Society
SP 273
OP 278
DO 10.1183/09031936.00000106
VO 29
IS 2
A1 J. C. Ho
A1 M. Chan-Yeung
A1 S. P. Ho
A1 J. C. Mak
A1 M. S. Ip
A1 G. C. Ooi
A1 M. P. Wong
A1 K. W. Tsang
A1 W. K. Lam
YR 2007
UL http://erj.ersjournals.com/content/29/2/273.abstract
AB The present study aimed to determine the alterations of antioxidant activities in erythrocytes from patients with nonsmall cell lung carcinoma (NSCLC). A comparative study of the systemic antioxidant activities in red blood cell lysate from subjects with NSCLC and healthy control subjects was conducted. The antioxidants catalase, superoxide dismutase (SOD) and glutathione peroxidase (GPx) were measured using chemical kinetic reactions under spectrophotometry. In total, 189 cases of mostly advanced-stage IIIB or stage IV NSCLC and 202 healthy controls were studied. In subjects with lung cancer, there was similar catalase activity, lower SOD activity (median (interquartile range) 13.4 (9.0–27.2) versus 48.7 (27.0–64.3) U·(ghaemoglobulin(Hb)-1), and higher GPx activity (175.2 (126.6–288.3) versus 49.2 (39.5–59.2) mU·(gHb)-1) compared with controls. The antioxidant activities in lung cancer subjects were not associated with age, sex, smoking status, or tumour cell types. However, more advanced disease (stage IV compared with stage IIIB) was associated with lower SOD activity. Using multivariable analysis, the presence of lung cancer independently predicted SOD and GPx activities. In conclusion, nonsmall cell lung carcinoma in Chinese subjects is associated with alterations in systemic antioxidant activities, which may play an important role in carcinogenesis.