Complement factor H autoantibodies are associated with early stage NSCLC.

Published

Journal Article

PURPOSE: To discover diagnostic biomarkers associated with early-stage non-small cell lung cancer (NSCLC), we searched for autoantibodies preferentially present in stage I patients compared with patients with advanced-stage disease. Here we describe an autoantibody against complement factor H (CFH) and this autoantibody's association with early-stage NSCLC. EXPERIMENTAL DESIGN: Immunoblots were used to detect autoantibodies in the sera of stage I NSCLC patients. An autoantibody recognizing a 150 kDa protein was discovered, and the protein was identified by mass spectrometry. The association of the autoantibody with early-stage disease was suggested by the results of immunoblot analysis with sera from 28 stage I patients and 28 stage III/IV patients. This association was confirmed by protein microarray of sera from 125 NSCLC patients of all stages as well as 125 controls matched by age, gender, and smoking history. RESULTS: The immunoreactive protein was identified as CFH. By immunoblot analysis, anti-CFH autoantibody was found in 50% of stage I NSCLC patients and 11% of late-stage NSCLC patients (P = 0.003). By protein microarray analysis, patients with stage I NSCLC had a significantly higher incidence of anti-CFH antibody than those with late-stage NSCLC (P = 0.0051). The percentage of sera with a positive level of CFH autoantibody was 30.4% in stage I, 21.1% in stage II, 12.5% in stage III, 7.4% in stage IV, and 8.0% in the control group. CONCLUSIONS: These findings suggest that in patients with NSCLC, CFH autoantibody is a molecular marker associated with early-stage disease.

Full Text

Duke Authors

Cited Authors

  • Amornsiripanitch, N; Hong, S; Campa, MJ; Frank, MM; Gottlin, EB; Patz, EF

Published Date

  • June 15, 2010

Published In

Volume / Issue

  • 16 / 12

Start / End Page

  • 3226 - 3231

PubMed ID

  • 20515868

Pubmed Central ID

  • 20515868

International Standard Serial Number (ISSN)

  • 1078-0432

Digital Object Identifier (DOI)

  • 10.1158/1078-0432.CCR-10-0321

Language

  • eng

Conference Location

  • United States