title: Serum sialyl lewis X-i antigen levels in non-small cell lung cancer: correlation with distant metastasis and survival.
abstract: To evaluate the correlation between serum levels of sialyl Lewis X-i antigen and distant metastasis and survival in patients with non-small cell lung cancer (NSCLC), we measured the serum levels of the tumor marker in 371 patients with untreated NSCLC. The sialyl Lewis X-i antigen level was measured using a RIA kit. In patients with adenocarcinoma or other NSCLC subtypes, there was a correlation between serum sialyl Lewis X-i antigen and stage of the disease (P = 0.0001 and P = 0.0015, respectively). Levels of the marker varied significantly depending on the number of metastatic organs in adenocarcinoma (P = 0.0089) and in other NSCLC subtypes (P = 0.002). Univariate analysis showed that survival of NSCLC patients with high (more than 100 units/ml) sialyl Lewis X-i antigen levels was significantly poorer than that of patients with low antigen levels (P = 0.0001). Multivariate analysis using Cox's proportional hazard model showed that high sialyl Lewis X-i antigen levels correlated significantly with poor survival (P = 0.004). Our data suggest that a high serum level of sialyl Lewis X-i antigen seems to be an indicator of the presence of metastasis and might indicate the need for a careful investigation of all putative metastatic sites. The serum levels of sialyl Lewis X-i antigen may reflect the extension of metastasis and would be helpful in considering treatment options.
authors.affiliation: Department of Pulmonary Medicine, Institute of Clinical Medicine, University of Tsukuba, Tsukuba City,
authors.forename: H
authors.initials: H
authors.lastname: Satoh
authors.forename: H
authors.initials: H
authors.lastname: Ishikawa
authors.forename: H
authors.initials: H
authors.lastname: Kamma
authors.forename: Y T
authors.initials: YT
authors.lastname: Yamashita
authors.forename: H
authors.initials: H
authors.lastname: Takahashi
authors.forename: M
authors.initials: M
authors.lastname: Ohtsuka
authors.forename: S
authors.initials: S
authors.lastname: Hasegawa
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000097:blood*; D002289:Carcinoma, Non-Small-Cell Lung / Q000097:blood* / Q000401:mortality / Q000473:pathology / Q000628:therapy; D005260:Female; D006801:Humans; D007983:Lewis Blood Group Antigens / Q000097:blood; D008175:Lung Neoplasms / Q000097:blood* / Q000401:mortality / Q000473:pathology / Q000628:therapy; D008297:Male; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009367:Neoplasm Staging; D009844:Oligosaccharides / Q000097:blood*; D000080506:Sialyl Lewis X Antigen; D016019:Survival Analysis; D013997:Time Factors
chemical_list: D014408:Biomarkers, Tumor; D007983:Lewis Blood Group Antigens; D009844:Oligosaccharides; D000080506:Sialyl Lewis X Antigen