Standardization of DNA isolation from low cell numbers for chimerism analysis by PCR of short tandem repeats

Mirjam van der Burg, H Kreyenberg, A Willasch, Barbara Barendregt, S Preuner, F Watzinger, T Lion, E Roosnek, J Harvey, M Alcoceba, MG Diaz, P Bader, Jacques Dongen

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33 Citations (Scopus)

Abstract

Analysis of short tandem repeats (STR) by PCR analysis is routinely used in chimerism diagnostics to monitor donor engraftment and to diagnose relapse. Some applications require chimerism analysis of low cell numbers, but no standardized protocol is available for DNA isolation from 1000 to 30 000 cells. The EU-supported EuroChimerism Consortium (project QLRT-2001-01485) selected four different protocols for 'small-scale' DNA isolation, which were tested by six laboratories for their ability to recover reproducible amounts of good quality DNA, suited for PCR-based STR analysis. The protocols included two direct lysis methods with and without detergents and proteinase K, and two commercial column-based kits. The direct lysis method using detergents and proteinase K showed the highest DNA recovery and the best performance in the multiplex PowerPlex16 STR assay. DNA isolated with this method also showed the highest sensitivity in chimerism analysis using singleplex PCR reactions of EuroChimerism STR markers. Sensitivity was reached ranging from 1 to 20% of recipient cells in a donor background. In conclusion, the direct lysis method using detergents and proteinase K is a standardized DNA isolation method well suited for chimerism studies on low cell numbers. Leukemia (2011) 25, 1467-1470; doi: 10.1038/leu.2011.118; published online 17 June 2011
Original languageUndefined/Unknown
Pages (from-to)1467-1470
Number of pages4
JournalLeukemia
Volume25
Issue number9
DOIs
Publication statusPublished - 2011

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