Recovery of genomic DNA from residual frozen archival blood clots suitable for amplification and use in genotyping assays

被引:14
|
作者
Iovannisci, DM
Ha, TT
Shaw, GM
机构
[1] Res Ctr Oakland, Oakland, CA USA
[2] Calif Birth Defects Monitoring Program, March Dimes Birth Defects Fdn, Berkeley, CA USA
来源
GENETIC TESTING | 2006年 / 10卷 / 01期
关键词
D O I
10.1089/gte.2006.10.44
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
A greatly neglected source of DNA potentially useful for genetic or forensic studies is the clot remaining from blood samples collected for serum chemistry measurements. We have investigated the utility of residual clots remaining from venipunctures collected for California's Expanded Maternal Serum Alpha-Fetoprotein Screening Program. We report a protocol based on the salting out method for the extraction of DNA from samples which have been archived and frozen for up to 2.5 years. As much as 57 mu g of high-quality DNA can be obtained from a 2-ml clot as determined by PicoGreen (R) ( Molecular Probes, Inc., Eugene, OR) fluorescence measurements. Quality of the purified DNA was evaluated by its ability to serve as template in polymerase chain reaction (PCR) amplifications, using primers that flank the polymorphic regions of six genes of pharmacogenetic interest distributed throughout the human genome. Sizes of the gene regions successfully amplified range from 215 bp to 2064 bp, using as little as 10 ng of template DNA. Because many genotyping protocols routinely recommend the design of amplicons in the 100-200 bp range, and 10-50 ng of template, we conclude that the clot remaining after serum has been removed from blood collected for serum chemistry measurements can serve as a reliable source of DNA for genotyping studies.
引用
收藏
页码:44 / 49
页数:6
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