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Elevated pretreatment serum concentration of YKL-40—An independent prognostic biomarker for poor survival in patients with metastatic nonsmall cell lung cancer†
Article first published online: 19 AUG 2010
Copyright © 2010 American Cancer Society
Volume 116, Issue 17, pages 4114–4121, 1 September 2010
How to Cite
Thöm, I., Andritzky, B., Schuch, G., Burkholder, I., Edler, L., Johansen, J. S., Bokemeyer, C., Schumacher, U. and Laack, E. (2010), Elevated pretreatment serum concentration of YKL-40—An independent prognostic biomarker for poor survival in patients with metastatic nonsmall cell lung cancer. Cancer, 116: 4114–4121. doi: 10.1002/cncr.25196
Preliminary results from this study were presented as a poster at the 3th European Society for Medical Oncology Congress, Stockholm, Sweden, September 12-16, 2008.
- Issue published online: 23 AUG 2010
- Article first published online: 19 AUG 2010
- Manuscript Accepted: 24 NOV 2009
- Manuscript Revised: 11 NOV 2009
- Manuscript Received: 23 AUG 2009
- nonsmall cell lung cancer;
- bone lesions
The glycoprotein YKL-40 is synthesized both by cancer cells and by tumor-associated macrophages and plays a functional role in tumor progression. Consequently, high serum YKL-40 levels have been associated with a poor prognosis in patients with several cancer types. However, the role of YKL-40 has not been established in nonsmall cell lung cancer (NSCLC).
Pretreatment serum levels of YKL-40 were determined in 189 patients with NSCLC (143 men and 46 women; median age, 62 years;, age range, 41-76 years). Twelve percent of patients had stage IIIB disease, and 88% had stage IV disease. Ninety-eight patients received combined gemcitabine and vinorelbine, and 91 received combined gemcitabine, vinorelbine, and cisplatin as first-line chemotherapy. The median overall survival was 37 weeks.
Patients had a median serum YKL-40 level of 209 ng/mL (range, 19-2153 ng/mL). No correlation was observed between overall survival and the type of chemotherapy regimen used, tumor stage, sex, or histologic types. Patients with high serum YKL-40 levels (greater than the median level for all patients [209 ng/mL]) had a significantly shorter survival than patients with serum YKL-40 levels below the median (median survival, 32 weeks vs 41 weeks; P = .007). In multivariate analysis, the serum YKL-40 level, the presence of bone lesions, and the serum lactate dehydrogenase level were independent, statistically significant prognostic factors.
The pretreatment serum YKL-40 level was identified as a new, independent prognostic biomarker in patients with metastatic NSCLC and may help to determine the individual prognosis of these patients. Cancer 2010. © 2010 American Cancer Society.