Copyright © 2005 Elsevier B.V. All rights reserved.
Detection of autoantibodies to survivin and livin in sera from patients with breast cancer
Received 15 February 2005;
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Abstract
Background
Survivin and livin are highly expressed in cancer cells and transformed cells, but show little or no expression in normal differentiated tissues. Human antibody responses to tumor-associated antigens have been detected, but little is known about the response to survivin and livin in breast cancer patients.
Methods
We examined the prevalence of anti-survivin and livin antibodies in breast cancer patients with a specific enzyme-linked immunosorbent assay (ELISA) using recombinant protein.
Results
Using a cutoff value for positivity determined as the mean absorbance + 2SD for healthy control samples, sera from 11 of 46 breast cancer patients (23.9%) were positive by the ELISA using recombinant survivin protein. Of 46 samples from the same breast cancer patients, 15 (32.6%) were positive for anti-livin antibodies. In addition, 24 (52.2%) were positive for 1 or both ELISAs using the respective proteins. Intensity of anti-livin antibody responses did not correlate with intensity of anti-survivin responses.
Conclusions
Anti-livin antibodies were detected in sera from breast cancer patients by an anti-livin ELISA using full-length recombinant livin protein. Like survivin, livin may act as a major cancer antigen in breast cancer patients.
Keywords: Survivin; Livin; Autoantibody; Breast cancer
Article Outline
- 1. Introduction
- 2. Materials and methods
- 2.1. Samples
- 2.2. Immunoassays for anti-livin antibody and anti-survivin antibody
- 2.3. Preabsorption of samples with recombinant survivin, livin or GFP
- 2.4. Statistical analysis
- 3. Results
- 3.1. Detection of anti-livin and anti-survivin antibodies
- 3.2. Preabsorption of anti-livin and anti-survivin antibodies
- 4. Discussion
- References






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