Abstract
Highly polymorphic microsatellite markers provide useful genetic markers for detection of complete or mixed chimerism in patients after allogeneic BMT (allo-BMT). We report application of automated DNA sizing technology for detection of post-BMT chimerism using fresh peripheral blood, BM, or archival blood smears and various DNA isolation techniques. Donors' and recipients' DNA was amplified with fluorescent PCR primers specific for short tandem repeat (STR) marker loci: FGA, VWA, TH01, F13A1, D21S11. Chimerism was assessed in 14 recipients after allo-BMT. A complete chimerism was detected in 10 patients, in 3 patients we observed fluctuations of chimerism status, and mixed chimerism was assessed in 1 patient. We show that DNA from different types of biologic specimens (whole peripheral blood, BM suspension, archival blood smears), prepared according to the various isolation techniques (salting-out method, phenol chloroform extraction, Chelex procedure) and amplified with fluorescent PCR primers for microsatellite markers, enable identification of chimerism status following allo-BMT in children.
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