In:
Cancer Research, American Association for Cancer Research (AACR), Vol. 70, No. 8_Supplement ( 2010-04-15), p. LB-134-LB-134
Abstract:
Millions of Formalin Fixed Paraffin Embedded (FFPE) cancer tissue samples currently present in the US and worldwide provide an enormous, invaluable repository to the discovery of biomarkers in cancer research, drug development, diagnosis and treatment of diseases. However, the processes of fixation and storage of FFPE samples lead to degradation and base modification with chemical residues. This degraded FFPE DNA is inefficiently amplified in the Infinium® whole genome amplification (WGA) step leading to poor performance in the Infinium® assay. In this study, FFPE DNA (100 ng input) was restored through a treatment with DNA polymerase, DNA repair enzyme, ligase, and modified Infinium® WGA reaction conditions. Canonical genotype cluster files were generated by creating artificially degraded Coriell DNAs and processing the samples through the restoration process and Infinium® assay. Results of genotyping on high density HumanCytoSNP-12 BeadChip®, featuring approximately 300k SNPs indicated that even highly degraded samples which show initial call rates of 40-70% can be successfully restored to a state that achieved call rates of greater than 90%, at a concordance greater than 99.0%, and associated standard deviation of log intensity less than 0.4. In general, over 80% of FFPE samples, which passed a QC assay metric were successfully restored and genotyped. Infinium® genotyping of restored DNA from a collection of tumor FFPE samples confirmed the presence of genomic aberrations around known cancer genes. Finally, we further demonstrated that paired sample analysis using canonical genotype clusters provide improved precision in CNV and LOH analysis compared to single sample analysis. Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 101st Annual Meeting of the American Association for Cancer Research; 2010 Apr 17-21; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2010;70(8 Suppl):Abstract nr LB-134.
Type of Medium:
Online Resource
ISSN:
0008-5472
,
1538-7445
DOI:
10.1158/1538-7445.AM10-LB-134
Language:
English
Publisher:
American Association for Cancer Research (AACR)
Publication Date:
2010
detail.hit.zdb_id:
2036785-5
detail.hit.zdb_id:
1432-1
detail.hit.zdb_id:
410466-3
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