| Title: |
Methyl-binding domain protein-based DNA isolation from human blood serum combines DNA analyses and serum-autoantibody testing |
| Authors: |
Wielscher, M; Pulverer, W; Peham, J; Hofner, M; Rappaport, CF; Singer, C; Jungbauer, C; Nöhammer, C; Weinhäusel, A |
| Publisher Information: |
BioMed Central |
| Publication Year: |
2011 |
| Collection: |
Imperial College London: Spiral |
| Subject Terms: |
Pathology; 0605 Microbiology; 1107 Immunology |
| Description: |
BACKGROUND: Circulating cell free DNA in serum as well as serum-autoantibodies and the serum proteome have great potential to contribute to early cancer diagnostics via non invasive blood tests. However, most DNA preparation protocols destroy the protein fraction and therefore do not allow subsequent protein analyses. In this study a novel approach based on methyl binding domain protein (MBD) is described to overcome the technical difficulties of combining DNA and protein analysis out of one single serum sample. METHODS: Serum or plasma samples from 98 control individuals and 54 breast cancer patients were evaluated upon silica membrane- or MBD affinity-based DNA isolation via qPCR targeting potential DNA methylation markers as well as by protein-microarrays for tumor-autoantibody testing. RESULTS: In control individuals, an average DNA level of 22.8 ± 25.7 ng/ml was detected applying the silica membrane based protocol and 8.5 ± 7.5 ng/ml using the MBD-approach, both values strongly dependent on the serum sample preparation methods used. In contrast to malignant and benign tumor serum samples, cell free DNA concentrations were significantly elevated in sera of metastasizing breast cancer patients. Technical evaluation revealed that serum upon MBD-based DNA isolation is suitable for protein-array analyses when data are consistent to untreated serum samples. CONCLUSION: MBD affinity purification allows DNA isolations under native conditions retaining the protein function, thus for example enabling combined analyses of DNA methylation and autoantigene-profiles from the same serum sample and thereby improving minimal invasive diagnostics. |
| Document Type: |
article in journal/newspaper |
| Language: |
unknown |
| Relation: |
BMC Clinical Pathology; http://hdl.handle.net/10044/1/41498 |
| DOI: |
10.1186/1472-6890-11-11 |
| Availability: |
http://hdl.handle.net/10044/1/41498; https://doi.org/10.1186/1472-6890-11-11 |
| Rights: |
This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| Accession Number: |
edsbas.8CBC1C74 |
| Database: |
BASE |