Elevation of sialyl stage-specific mouse embryonic antigen levels in pleural effusion in patients with adenocarcinoma of the lung.
Sialyl stage-specific mouse embryonic antigen (SSEA-1) levels were measured in pleural effusions obtained from patients with lung cancer and benign pulmonary disease, using a solid-phase immunoradiometric sandwich assay. The mean (+/- SEM) levels (unit/ml) of pleural fluid sialyl SSEA-1 were 3620 +/- 1419 in adenocarcinoma (n = 25), 123 +/- 30 in nonadenocarcinoma (n = 13) and 95 +/- 19 in benign pulmonary disease (n = 13), respectively. The positive rate was 64% in adenocarcinoma, 7.7% in nonadenocarcinoma, and 0% in benign pulmonary disease, respectively, when a cutoff level was defined as the mean + 3 SD value (300 unit/ml) based on pleural fluid sialyl SSEA-1 levels in benign pulmonary disease. There was a significant positive correlation between pleural fluid levels of sialyl SSEA-1 and those of carcinoembryonic antigen in adenocarcinoma patients (r = 0.8246, P less than 0.01). Pleural fluid sialyl SSEA-1 levels correlated with cytologic findings in adenocarcinoma patients. These observations suggest that sialyl SSEA-1 in pleural effusion is a useful marker to discriminate malignant from nonmalignant and adenocarcinoma from nonadenocarcinoma of the lung.
Iguchi
H
H
Department of Biochemistry, National Kyushu Cancer Center, Fukuoka, Japan.
Hara
N
N
Miyazaki
K
K
Ohtsu
Y
Y
Sonoda
F
F
Ohta
M
M
D000230:Adenocarcinoma / Q000276:immunology*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000951:Antigens, Neoplasm / Q000032:analysis*; D002272:Carcinoembryonic Antigen / Q000032:analysis; D005260:Female; D006017:Glycolipids / Q000032:analysis*; D006801:Humans; D016256:Lewis X Antigen; D008175:Lung Neoplasms / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D010996:Pleural Effusion / Q000276:immunology*; D011863:Radioimmunoassay
D000951:Antigens, Neoplasm; D002272:Carcinoembryonic Antigen; D006017:Glycolipids; D016256:Lewis X Antigen