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Quantification of chimerism within peripheral blood, bone marrow and purified leukocyte subsets: comparison of singleplex and multiplex PCR amplification of short tandem repeat (STR) loci

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Beck O, Seidl C, Lehrnbecher T, Kreyenberg H, Schwabe D, Klingebiel T, Seifried E, Bader P, Koehl U. Quantification of chimerism within peripheral blood, bone marrow and purified leukocyte subsets: comparison of singleplex and multiplex PCR amplification of short tandem repeat (STR) loci.

Eur J Haematol 2005 © Blackwell Munksgaard 2005. Abstract: 

Objective and Methods: Chimerism analysis has become a routine diagnostic procedure after haematopoietic allogeneic stem cell transplantation for early detection of relapse of disease or graft failure. Whereas some centres developed individual in-house short tandem repeat (STR) systems, others prefer commercial multiplex PCR systems. However, little is known about inter-assay variation, which could have a significant impact on treatment decision. We therefore compared two commercial multiplex PCR kits with our in-house STR system using different sample sources, such as peripheral blood (PB), bone marrow (BM) and specific leukocyte subsets.Results: Fifty samples of eighteen paediatric patients were analysed. For neither material, PB, BM and leukocyte subtypes, a significant difference between the STR systems tested was observed. Chimerism analyses of each single STR primer, which is component of both the in-house and the commercial STR system, did not reveal significant differences.Conclusion: Our analysis demonstrates that similar results can be obtained with both assays, even when using various sample sources. Further evaluation of different test systems will help to increase interlaboratory standardisation of chimerism analyses for early clinical intervention.
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Keywords: cell subsets; chimerism analysis; short tandem repeats; stem cell transplantation

Document Type: Research Article

Affiliations: 1: Paediatric Haematology and Oncology, J.W. Goethe University Frankfurt/Main, Germany 2: Institute for Transfusion Medicine and Immunohaematology, RCBDS Hessia, Frankfurt, Germany

Publication date: March 1, 2006

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